Include saedit2

48 files changed, 7390 insertions, 0 deletions

diff --git a/saedit/.gitignore b/saedit/.gitignore
new file mode 100644
index 0000000..e680e74
--- /dev/null
+++ b/saedit/.gitignore
@@ -0,0 +1,6 @@
+*~
+*.swp
+*.o
+*/*.o
+glade/libsaedit.so
+saedit
diff --git a/saedit/.gitlab-ci.yml b/saedit/.gitlab-ci.yml
new file mode 100644
index 0000000..0807941
--- /dev/null
+++ b/saedit/.gitlab-ci.yml
@@ -0,0 +1,6 @@
+before_script:
+  - apt-get update -qq && apt-get install -y -qq gtk+3.0 gtksourceview-3.0
+
+saedit:
+  script:
+    - make all
diff --git a/saedit/LICENSE b/saedit/LICENSE
new file mode 100644
index 0000000..eb82ba2
--- /dev/null
+++ b/saedit/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    saedit2
+    Copyright (C) 2018  Danil Sagunov
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    saedit2  Copyright (C) 2018  Danil Sagunov
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/saedit/Makefile b/saedit/Makefile
new file mode 100644
index 0000000..207eeaf
--- /dev/null
+++ b/saedit/Makefile
@@ -0,0 +1,33 @@
+CC ?= gcc
+
+CFLAGS += `pkg-config --cflags gtk+-3.0 gtksourceview-3.0`
+CFLAGS += -fPIC -Itreefolderview -Ispritedrawingarea
+CFLAGS += -Wall -Wdeclaration-after-statement -ansi
+CFLAGS += -Werror -Wextra -Wstrict-prototypes
+CFLAGS += -Wno-unused-parameter
+
+LDFLAGS += `pkg-config --libs gtk+-3.0 gtksourceview-3.0`
+LDFLAGS += -rdynamic -Ltreefolderview -Lspritedrawingarea
+
+FLAGS = ${CFLAGS} ${LDFLAGS}
+
+all: saedit glade/libsaedit.so
+
+saedit: main.o treefolderview/treefolderview.o xml.o  \
+	spritedrawingarea/spritedrawingarea.o \
+	context.o imageset.o action.o animation.o common.o \
+	interactor.o callbacks.o errors.o config.o file.o \
+	buffer.o spritedrawingarea/sdalayer.o xmlsetup.o \
+	drawfuncs.o
+	${CC} $^ -o saedit ${FLAGS}
+
+glade/libsaedit.so: treefolderview/treefolderview.o \
+	spritedrawingarea/spritedrawingarea.o \
+	spritedrawingarea/sdalayer.o
+	${CC} $^ -o glade/libsaedit.so ${FLAGS} -shared
+
+%.o: %.c
+	${CC} $^ -c -o $@ ${CFLAGS}
+
+clean:
+	rm -f *.o */*.o *~ glade/libsaedit.so saedit
diff --git a/saedit/README.md b/saedit/README.md
new file mode 100644
index 0000000..4be496d
--- /dev/null
+++ b/saedit/README.md
@@ -0,0 +1,7 @@
+# Instructions
+
+1. Run make
+2. Fix dependencies until if exits successfully
+3. Run ./saedit binary, which will have been created if it ran successfully.
+
+Bugs report to Vasily.
diff --git a/saedit/action.c b/saedit/action.c
new file mode 100644
index 0000000..a9b31e2
--- /dev/null
+++ b/saedit/action.c
@@ -0,0 +1,176 @@
+#include "action.h"
+#include "animation.h"
+#include "imageset.h"
+#include "context.h"
+
+Action *
+action_new (
+	const SpriteContext *context,
+	const XMLNode *node, 
+	gint included_from
+) {
+	Action *action;
+	GList  *list;
+	gchar  *imgset_name;
+	gboolean fail = FALSE;
+	Imageset *imageset;
+
+	g_return_val_if_fail (g_strcmp0 (node->name, "action") == 0, NULL);
+	
+	action = (Action *) g_new0 (Action, 1);
+
+	action->name = xml_node_get_attr_value (node, "name");
+	if (action->name == NULL) {
+		/* TODO: report error */
+		fail = TRUE;
+	}
+
+	imgset_name = xml_node_get_attr_value (node, "imageset");
+	if (imgset_name == NULL) {
+		/* TODO: report error */
+		fail = TRUE;
+	} else {
+		imageset = sprite_context_get_imageset (context, imgset_name);
+		if (imageset == NULL) {
+			/* TODO: report error */
+			fail = TRUE;
+		}
+	}
+
+	if (fail) {
+		g_free (action);
+		return NULL;
+	}
+
+	action->hp = xml_node_get_int_attr_value (node, "hp", 100);
+
+	list = node->sub_nodes;
+	while (list != NULL) {
+		XMLNode *current = (XMLNode *) list->data;
+		
+		if (g_strcmp0 (current->name, "animation") == 0) {
+			action_add_animation (
+				action,
+				imageset,
+				current,
+				included_from
+			);
+		} else {
+			/* TODO: action contains something unknown */
+		}
+
+		list = g_list_next (list);
+	}
+
+	return action;
+}
+
+void
+action_add_animation (
+	Action *action,
+	const Imageset *imageset,
+	const XMLNode *node,
+	gint included_from
+) {
+	Animation *animation;
+
+	g_return_if_fail (g_strcmp0 (node->name, "animation") == 0);
+
+	animation = animation_new (imageset, node, included_from);
+	if (animation == NULL)
+		return;
+
+	if (g_list_find_custom (
+		action->animations, animation,
+		(GCompareFunc) animation_compare_by_direction) != NULL
+	) {
+		animation_free (animation);
+		return;
+	}
+
+	action->animations = g_list_append (action->animations, animation);
+}
+
+void
+action_free (Action *action) {
+	g_list_free_full (
+		action->animations,
+		(GDestroyNotify) animation_free
+	);
+
+	g_free (action->name);
+	g_free (action);
+}
+
+gint
+action_compare_by_hp_and_name (
+	const Action *first,
+	const Action *second
+) {
+	if (first->hp != second->hp) {
+		return first->hp - second->hp;
+	}
+	return g_strcmp0 (first->name, second->name);
+}
+
+gboolean
+action_hp_and_name_equals (
+	const Action *action,
+	gint hp,
+	const gchar *name
+) {
+	return
+		action->hp == hp &&
+		g_strcmp0 (action->name, name) == 0;
+}
+
+const Animation *
+action_get_animation (
+	const Action *action,
+	const gchar *direction
+) {
+	GList *animation = action->animations;
+	g_return_val_if_fail (animation != NULL, NULL);
+	
+	while (direction != NULL && animation != NULL) {
+		Animation *current = (Animation *) animation->data;
+		g_assert (current != NULL);
+		if (animation_direction_equals (current, direction))
+			return current;
+		
+		animation = g_list_next (animation);
+	}
+
+	return (Animation *) action->animations->data;
+}
+
+void
+action_get_hp_and_name (
+	const Action *action,
+	gint *hp,
+	gchar **name
+) {
+	if (hp != NULL)
+		*hp = action->hp;
+	if (name != NULL)
+		*name = action->name;
+}
+
+GList *
+action_get_directions (const Action *action) {
+	GList *result = NULL;
+	GList *animations = action->animations;
+
+	while (animations != NULL) {
+		Animation *animation = (Animation *) animations->data;
+		result = g_list_append (result, animation->direction);
+		animations = g_list_next (animations);
+	}
+
+	return result;
+}
+
+gchar *
+get_action_id (gint hp, const gchar *name) {
+	return g_strdup_printf ("%d:%s", hp, name);
+}
diff --git a/saedit/action.h b/saedit/action.h
new file mode 100644
index 0000000..57da155
--- /dev/null
+++ b/saedit/action.h
@@ -0,0 +1,59 @@
+#ifndef ACTION_H
+#define ACTION_H
+
+#include <glib.h>
+#include "common.h"
+#include "imageset.h"
+#include "animation.h"
+#include "xml.h"
+
+typedef struct {
+	gchar *name;
+	gint hp;
+	GList *animations;
+} Action;
+
+void
+action_free (Action *action);
+
+gint
+action_compare_by_hp_and_name (
+	const Action *first,
+	const Action *second
+);
+
+gboolean
+action_hp_and_name_equals (
+	const Action *action,
+	gint hp,
+	const gchar *name
+);
+
+void
+action_add_animation (
+	Action  *action,
+	const Imageset *imageset,
+	const XMLNode *node,
+	gint included_from
+);
+
+const Animation *
+action_get_animation (
+	const Action *action,
+	const gchar *direction
+);
+
+void
+action_get_hp_and_name (
+	const Action *action,
+	gint *hp,
+	gchar **name
+);
+
+GList *
+action_get_directions (const Action *action);
+
+gchar *
+get_action_id (gint hp, const gchar *name);
+
+#endif
diff --git a/saedit/animation.c b/saedit/animation.c
new file mode 100644
index 0000000..997b420
--- /dev/null
+++ b/saedit/animation.c
@@ -0,0 +1,386 @@
+#include "animation.h"
+#include <string.h>
+
+static void
+animation_add_element_pause (
+	Animation *animation,
+	gint delay,
+	gint rand,
+	gint line_no
+) {
+	AnimElement *elem = animation_element_new ();
+	elem->delay  = delay;
+	elem->rand   = rand;
+	elem->type   = ELEMENT_PAUSE;
+	elem->line_no = line_no;
+
+	animation->elements = g_list_append (animation->elements, elem);
+}
+
+static void
+animation_add_element_end (
+	Animation *animation,
+	gint rand,
+	gint line_no
+) {
+	AnimElement *elem = animation_element_new ();
+	elem->type    = ELEMENT_END;
+	elem->rand    = rand;
+	elem->line_no = line_no;
+
+	animation->elements = g_list_append (animation->elements, elem);
+}
+
+static void
+animation_add_element_frame (
+	Animation *animation,
+	const Imageset *imageset,
+	gint index,
+	gint offsetX,
+	gint offsetY,
+	gint delay,
+	gint rand,
+	gint line_no
+) {
+	gint x, y;
+	AnimElement *elem = animation_element_new ();
+
+	elem->type    = ELEMENT_FRAME;
+
+	imageset_get_offset (imageset, &x, &y);
+	offsetX += x;
+	offsetY += y;
+
+	imageset_get_size (imageset, &x, &y);
+	offsetX -= x / 2;
+	offsetY -= y;
+
+	elem->offsetX = offsetX;
+	elem->offsetY = offsetY;
+	
+	elem->delay   = delay;
+	elem->rand    = rand;
+	elem->line_no = line_no;
+
+	elem->sprite = imageset_get_sprite_by_index (imageset, index);
+	if (elem->sprite == NULL) {
+		/* TODO: report this */
+		g_free (elem);
+		return;
+	}
+
+	animation->elements = g_list_append (animation->elements, elem);
+}
+
+static void
+animation_add_element_goto (
+	Animation *animation,
+	gchar *label,
+	gint   rand,
+	gint   line_no
+) {
+	AnimElement *elem = animation_element_new ();
+	elem->type = ELEMENT_GOTO;
+	elem->str  = label;
+	elem->rand = rand;
+	elem->line_no = line_no;
+
+	animation->elements = g_list_append (animation->elements, elem);
+}
+
+static void
+animation_add_element_jump (
+	Animation *animation,
+	gchar *action,
+	gint   rand,
+	gint   line_no
+) {
+	AnimElement *elem = animation_element_new ();
+	elem->type = ELEMENT_JUMP;
+	elem->str  = action;
+	elem->rand = rand;
+	elem->line_no = line_no;
+
+	animation->elements = g_list_append (animation->elements, elem);
+}
+
+static void
+animation_add_element_label (
+	Animation *animation,
+	gchar *name,
+	gint line_no
+) {
+	AnimElement *elem = animation_element_new ();
+	elem->type = ELEMENT_LABEL;
+	elem->str  = name;
+	elem->line_no = line_no;
+
+	animation->elements = g_list_append (animation->elements, elem);
+}
+
+static void
+animation_add_sequence (
+	Animation     *animation,
+	const Imageset *imageset,
+	const XMLNode *node,
+	gint           offsetX,
+	gint           offsetY,
+	gint           delay,
+	gint           rand,
+	gint           line_no
+) {
+	gchar *value, **tokens;
+	gint start  = xml_node_get_int_attr_value (node, "start", -1);
+	gint end    = xml_node_get_int_attr_value (node,   "end", -1);
+	gint repeat = xml_node_get_int_attr_value_limited (
+		node, "repeat", 1, 0, 100
+	);
+
+	g_return_if_fail (g_strcmp0 (node->name, "sequence") == 0);
+
+	if (repeat < 1) {
+		/* TODO: show error */
+		return;
+	}
+
+	value = xml_node_get_attr_value (node, "value");
+
+	if (value == NULL) {
+		if (start < 0 || end < 0) {
+			/* TODO: show error */
+			return;
+		}
+		value = g_strdup_printf ("%d-%d", start, end);
+	}
+
+	tokens = g_strsplit (value, ",", 0);
+	g_free (value);
+
+	while (repeat > 0) {
+		gchar **token = tokens;
+
+		while (*token != NULL) {
+			if (g_strcmp0 (*token, "p") == 0) {
+				animation_add_element_pause (
+					animation,
+					delay,
+					rand,
+					line_no
+				);
+			} else {
+				gint start = -1, end = -1, d;
+				gchar *delim = strchr (*token, '-');
+
+				if (delim == NULL) {
+					try_strtoint (*token, &start);
+					end = start;
+				} else {
+					*delim = 0;
+					try_strtoint (   *token, &start);
+					try_strtoint (delim + 1,   &end);
+					*delim = '-';
+				}
+
+				if (start < 0 || end < 0) {
+					/* TODO: show error */
+					g_strfreev (tokens);
+					return;
+				}
+
+				d = start <= end ? +1 : -1;
+				end += d;
+
+				while (start != end) {
+					animation_add_element_frame (
+						animation,
+						imageset,
+						start,
+						offsetX,
+						offsetY,
+						delay,
+						rand,
+						line_no
+					);
+					start += d;
+				}
+			}
+			++token;
+		}
+		--repeat;
+	}
+
+	g_strfreev (tokens);
+}
+
+static void
+animation_add_elements_from_node (
+	Animation *animation,
+	const Imageset *imageset,
+	const XMLNode *node,
+	gint  included_from
+) {
+	gchar *name = node->name;
+
+	gint   offsetX, offsetY;
+	gint   delay, rand;
+	gchar *str;
+	gint   line_no;
+
+	imageset_get_offset (imageset, &offsetX, &offsetY);
+
+	offsetX += xml_node_get_int_attr_value (node, "offsetX", 0);
+	offsetY += xml_node_get_int_attr_value (node, "offsetY", 0);
+
+	delay = xml_node_get_int_attr_value_limited (
+		node, "delay", 0, 
+		0, 100000
+	);
+
+	rand = xml_node_get_int_attr_value_limited (
+		node, "rand", 100,
+		0, 100
+	);
+
+	line_no = included_from;
+	if (line_no == -1)
+		line_no = node->line_no;
+
+	if (g_strcmp0 (name, "frame") == 0) {
+		gint index = xml_node_get_int_attr_value (node, "index", -1);
+		
+		if (index < 0) {
+			/* TODO: report error */
+			return;
+		}
+
+		animation_add_element_frame (
+			animation,
+			imageset,
+			index,
+			offsetX, offsetY,
+			delay, rand,
+			line_no
+		);
+	} else
+
+	if (g_strcmp0 (name, "pause") == 0) {
+		animation_add_element_pause (
+			animation, delay, rand, line_no
+		);
+	} else
+
+	if (g_strcmp0 (name, "end") == 0) {
+		animation_add_element_end (animation, rand, line_no);
+	} else
+
+	if (g_strcmp0 (name, "jump") == 0) {
+		str = xml_node_get_attr_value (node, "action");
+		animation_add_element_jump (
+			animation, str, rand, line_no
+		);
+	} else
+
+	if (g_strcmp0 (name, "label") == 0) {
+		str = xml_node_get_attr_value (node, "name");
+		if (str == NULL) {
+			/* TODO: report error */
+			return;
+		}
+
+		animation_add_element_label (animation, str, line_no);
+	} else
+	
+	if (g_strcmp0 (name, "goto") == 0) {
+		str = xml_node_get_attr_value (node, "label");
+		if (str == NULL) {
+			/* TODO: report error */
+			return;
+		}
+
+		animation_add_element_goto (
+			animation, str, rand, line_no
+		);
+	} else
+
+	if (g_strcmp0 (name, "sequence") == 0) {
+		animation_add_sequence (
+			animation, 
+			imageset,
+			node,
+			offsetX, offsetY,
+			delay, rand,
+			line_no
+		);
+	} else
+
+	{
+		/* TODO: unknown tag */
+		return;
+	}
+}
+
+Animation *
+animation_new (
+	const Imageset *imageset,
+	const XMLNode *node,
+	gint included_from
+) {
+	Animation *animation;
+	gchar     *dir;
+	GList     *sub_node;
+
+	g_return_val_if_fail (g_strcmp0 (node->name, "animation") == 0, NULL);
+	
+	dir = xml_node_get_attr_value (node, "direction");
+
+	if (dir == NULL)
+		dir = "";
+
+	animation = (Animation *) g_new0 (Animation, 1);
+	animation->direction = dir;
+
+	sub_node = node->sub_nodes;
+	while (sub_node != NULL) {
+		animation_add_elements_from_node (
+			animation,
+			imageset,
+			(XMLNode *) sub_node->data,
+			included_from
+		);
+		sub_node = g_list_next (sub_node);
+	}
+
+	return animation;
+}
+
+gint
+animation_compare_by_direction (
+	const Animation *first,
+	const Animation *second
+) {
+	return g_strcmp0 (first->direction, second->direction);
+}
+
+gboolean
+animation_direction_equals (
+	const Animation *animation,
+	const gchar *direction
+) {
+	return g_strcmp0 (animation->direction, direction) == 0;
+}
+
+void
+animation_free (Animation *animation) {
+	g_list_free_full (
+		animation->elements,
+		(GDestroyNotify) g_free
+	);
+
+	g_free (animation->direction);
+	g_free (animation);
+}
+
+AnimElement *
+animation_element_new () {
+	return (AnimElement *) g_new0 (AnimElement, 1);
+}
diff --git a/saedit/animation.h b/saedit/animation.h
new file mode 100644
index 0000000..6c4d05f
--- /dev/null
+++ b/saedit/animation.h
@@ -0,0 +1,59 @@
+#ifndef ANIMATION_H
+#define ANIMATION_H
+
+#include <gdk/gdk.h>
+#include <glib.h>
+#include "common.h"
+#include "xml.h"
+#include "imageset.h"
+
+typedef struct {
+	gchar *direction;
+	GList *elements;
+} Animation;
+
+Animation *
+animation_new (
+	const Imageset *imageset,
+	const XMLNode *node,
+	gint included_from
+);
+
+void
+animation_free (Animation *animation);
+
+gint
+animation_compare_by_direction (
+	const Animation *first,
+	const Animation *second
+);
+
+gboolean
+animation_direction_equals (
+	const Animation *animation,
+	const gchar *direction
+);
+
+enum {
+	ELEMENT_END = 0,
+	ELEMENT_FRAME,
+	ELEMENT_JUMP,
+	ELEMENT_GOTO,
+	ELEMENT_PAUSE,
+	ELEMENT_LABEL,
+	ELEMENT_COUNT
+};
+
+typedef struct {
+	gint   type;
+	gint   delay;
+	gint   offsetX, offsetY;
+	gint   rand;
+	gchar *str;
+	gint   line_no;
+	GdkPixbuf *sprite;
+} AnimElement;
+
+AnimElement *animation_element_new (void);
+
+#endif
diff --git a/saedit/buffer.c b/saedit/buffer.c
new file mode 100644
index 0000000..5c51bcc
--- /dev/null
+++ b/saedit/buffer.c
@@ -0,0 +1,87 @@
+#include <gtksourceview/gtksource.h>
+#include "main.h"
+#include "buffer.h"
+
+gchar *
+buffer_get_text () {
+	GtkTextIter start, end;
+	GtkTextBuffer *buffer =
+		GTK_TEXT_BUFFER (gtk_text_view_get_buffer (
+			GTK_TEXT_VIEW (source_view)
+		));
+
+	gtk_text_buffer_get_start_iter (buffer, &start);
+	gtk_text_buffer_get_end_iter (buffer, &end);
+
+	return gtk_text_buffer_get_text (buffer, &start, &end, TRUE);
+}
+
+void
+buffer_set_text (
+	const gchar *text,
+	const guint len
+) {
+	GtkTextBuffer *buffer =
+		GTK_TEXT_BUFFER (gtk_text_view_get_buffer (
+			GTK_TEXT_VIEW (source_view)
+		));
+
+	gtk_text_buffer_set_text (buffer, text, len);
+}
+
+void
+buffer_mark_line (gint line_no) {
+	GtkTextIter iter, end;
+	GtkSourceBuffer *buffer = GTK_SOURCE_BUFFER (
+		gtk_text_view_get_buffer (GTK_TEXT_VIEW (source_view))
+	);
+
+	gtk_text_buffer_get_start_iter (GTK_TEXT_BUFFER (buffer), &iter);
+	gtk_text_buffer_get_end_iter   (GTK_TEXT_BUFFER (buffer),  &end);
+
+	gtk_source_buffer_remove_source_marks (
+		buffer,
+		&iter,
+		&end,
+		"active-line"
+	);
+
+	if (line_no == -1)
+		return;
+
+	gtk_text_iter_set_line (&iter, line_no);
+	gtk_text_view_scroll_to_mark (
+		GTK_TEXT_VIEW (source_view),
+		(GtkTextMark *) gtk_source_buffer_create_source_mark (
+			buffer,
+			NULL, 
+			"active-line", 
+			&iter
+		),
+		0.0,
+		TRUE,
+		0.0,
+		0.5
+	);
+}
+
+
+void
+buffer_set_modified (gboolean modified) {
+	GtkTextBuffer *buffer =
+		GTK_TEXT_BUFFER (gtk_text_view_get_buffer (
+			GTK_TEXT_VIEW (source_view)
+		));
+
+	gtk_text_buffer_set_modified (buffer, modified);
+}
+
+gboolean
+buffer_get_modified () {
+	GtkTextBuffer *buffer =
+		GTK_TEXT_BUFFER (gtk_text_view_get_buffer (
+			GTK_TEXT_VIEW (source_view)
+		));
+
+	return gtk_text_buffer_get_modified (buffer);
+}
diff --git a/saedit/buffer.h b/saedit/buffer.h
new file mode 100644
index 0000000..2926687
--- /dev/null
+++ b/saedit/buffer.h
@@ -0,0 +1,22 @@
+#ifndef _BUFFER_H_
+#define _BUFFER_H_
+
+gchar *
+buffer_get_text (void);
+
+void
+buffer_set_text (
+	const gchar *text,
+	const guint len
+);
+
+void
+buffer_mark_line (gint line_no);
+
+void
+buffer_set_modified (gboolean modified);
+
+gboolean
+buffer_get_modified (void);
+
+#endif
diff --git a/saedit/callbacks.c b/saedit/callbacks.c
new file mode 100644
index 0000000..f27fc47
--- /dev/null
+++ b/saedit/callbacks.c
@@ -0,0 +1,432 @@
+#include "main.h"
+#include "errors.h"
+#include "config.h"
+#include "file.h"
+#include "buffer.h"
+#include <string.h>
+
+void
+store_append_action (const Action *action, gpointer user_data) {
+	int hp;
+	gchar *name;
+	GtkTreeIter iter;
+
+	action_get_hp_and_name (action, &hp, &name);
+	gtk_list_store_append (store_actions, &iter);
+
+	gtk_list_store_set (
+		store_actions,
+		&iter,
+		0, name,
+		1, hp,
+		2, get_action_id (hp, name),
+		-1
+	);
+}
+
+void
+parse_buffer_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+) {
+	gchar *buffer_text;
+	GError *error = NULL;
+	GList *actions;
+
+	release_context ();
+
+	buffer_text = buffer_get_text ();
+
+	context = sprite_context_new (
+		config_keys_get_data_folder_path ()
+	);
+	interactor = interactor_new (context);
+
+	sprite_context_add_sprite (
+		context,
+		xml_parse_buffer (buffer_text, &error),
+		-1
+	);
+
+	if (error != NULL) {
+		post_error ("XML parser", error->message);
+		g_error_free (error);
+	}
+
+	g_free (buffer_text);
+
+	interactor_set_updated_callback (interactor, intr_updated);
+
+	actions = sprite_context_get_actions (context);
+	g_list_foreach (actions, (GFunc) store_append_action, NULL);
+	g_list_free (actions);
+
+	gtk_widget_queue_draw (d_area);
+}
+
+void
+append_direction (const gchar *direction, gpointer user_data) {
+	gchar *display;
+
+	g_return_if_fail (direction != NULL);
+
+	if (strlen (direction) == 0)
+		display = g_strdup ("<empty>");
+	else
+		display = g_strdup (direction);
+
+	gtk_combo_box_text_append (
+		cb_directions,
+		direction,
+		display
+	);
+
+	g_free (display);
+}
+
+void
+action_changed_cb (GtkComboBox *cbox, gpointer user_data) {
+	GList *directions;
+	GtkTreeIter iter;
+	gint hp;
+	gchar *name;
+	const Action *action;
+	gboolean w_run;
+
+	g_return_if_fail (cbox == cb_actions);
+
+	if (interactor == NULL)
+		return;
+
+	if (!gtk_combo_box_get_active_iter (cbox, &iter))
+		return;
+
+	gtk_tree_model_get (
+		GTK_TREE_MODEL (store_actions),
+		&iter,
+		0, &name,
+		1, &hp,
+		-1
+	);
+
+	w_run = interactor_loop_running (interactor);
+	if (w_run)
+		interactor_loop_stop (interactor);
+
+	gtk_combo_box_text_remove_all (cb_directions);
+
+	action = sprite_context_get_action (context, hp, name);
+	g_return_if_fail (action != NULL);
+
+	directions = action_get_directions (action);
+	g_list_foreach (directions, (GFunc) append_direction, NULL);
+	g_list_free (directions);
+
+	interactor_set_action (interactor, hp, name);
+
+	if (w_run)
+		interactor_loop_start (interactor, 10, 10);
+}
+
+void
+direction_changed_cb (GtkComboBox *cbox, gpointer user_data) {
+	gchar *active_text;
+
+	g_return_if_fail (cbox == GTK_COMBO_BOX (cb_directions));
+
+	if (interactor == NULL)
+		return;
+
+	active_text = gtk_combo_box_text_get_active_text (cb_directions);
+
+	if (active_text == NULL)
+		return;
+
+	interactor_set_direction (
+		interactor,
+		active_text
+	);
+}
+
+void 
+play_pause_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+) {
+	if (interactor == NULL)
+		return;
+
+	if (interactor_loop_running (interactor))
+		interactor_loop_stop (interactor);
+	else
+		interactor_loop_start (interactor, 10, 10);
+}
+
+void 
+next_frame_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+) {
+	if (interactor == NULL)
+		return;
+
+	interactor_skip_current_frame (interactor);
+}
+
+void 
+first_frame_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+) {
+	if (interactor == NULL)
+		return;
+
+	interactor_loop_stop (interactor);
+	interactor_reset_animation (interactor);
+}
+
+void
+choose_df_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	TreeFolderView *tfview;
+	GtkWidget *dialog;
+	gint res;
+	gchar *filename;
+
+	g_return_if_fail (IS_TREE_FOLDER_VIEW (user_data));
+
+	tfview = TREE_FOLDER_VIEW (user_data);
+	dialog = gtk_file_chooser_dialog_new (
+		"Choose data folder",
+		GTK_WINDOW (main_window),
+		GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
+		"Cancel", GTK_RESPONSE_CANCEL,
+		"Open", GTK_RESPONSE_ACCEPT,
+		NULL
+	);
+
+	gtk_file_chooser_set_filename (
+		GTK_FILE_CHOOSER (dialog),
+		tree_folder_view_get_filename (tfview)
+	);
+
+	res = gtk_dialog_run (GTK_DIALOG (dialog));
+
+	if (res == GTK_RESPONSE_ACCEPT) {
+		filename = gtk_file_chooser_get_filename (
+			GTK_FILE_CHOOSER (dialog)
+		);
+
+		config_keys_set_data_folder_path (filename);
+		config_keys_save ();
+
+		tree_folder_view_set_filename (
+			tfview,
+			filename
+		);
+
+		g_free (filename);
+	}
+		
+	gtk_widget_destroy (dialog);
+}
+
+void
+open_file_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	GtkWidget *dialog;
+	GtkFileChooser *chooser;
+	gint res;
+	gchar *data_folder;
+
+	dialog = gtk_file_chooser_dialog_new (
+		NULL,
+		GTK_WINDOW (main_window),
+		GTK_FILE_CHOOSER_ACTION_OPEN,
+		"_Cancel", GTK_RESPONSE_CANCEL,
+		"_Open", GTK_RESPONSE_ACCEPT,
+		NULL
+	);
+	
+	data_folder = config_keys_get_data_folder_path ();
+
+	chooser = GTK_FILE_CHOOSER (dialog);
+	gtk_file_chooser_set_current_folder (
+		chooser,
+		data_folder
+	);
+
+	res = gtk_dialog_run (GTK_DIALOG (dialog));
+
+	if (res == GTK_RESPONSE_ACCEPT) {
+		gchar *filename = gtk_file_chooser_get_filename (chooser);
+		open_file (filename);
+		g_free (filename);
+	}
+
+	gtk_widget_destroy (dialog);
+	g_free (data_folder);
+}
+
+void save_file_as_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	GtkWidget *dialog;
+	GtkFileChooser *chooser;
+	gint res;
+	gchar *data_folder;
+
+	dialog = gtk_file_chooser_dialog_new (
+		NULL,
+		GTK_WINDOW (main_window),
+		GTK_FILE_CHOOSER_ACTION_SAVE,
+		"_Cancel", GTK_RESPONSE_CANCEL,
+		"_Save", GTK_RESPONSE_ACCEPT,
+		NULL
+	);
+	
+	data_folder = config_keys_get_data_folder_path ();
+
+	chooser = GTK_FILE_CHOOSER (dialog);
+	gtk_file_chooser_set_do_overwrite_confirmation (chooser, TRUE);
+
+	if (get_opened_file_name () != NULL) {
+		gtk_file_chooser_set_current_name (
+			chooser,
+			get_opened_file_name ()
+		);
+	} else {
+		gtk_file_chooser_set_current_folder (
+			chooser,
+			data_folder
+		);
+	}
+
+	res = gtk_dialog_run (GTK_DIALOG (dialog));
+
+	if (res == GTK_RESPONSE_ACCEPT) {
+		gchar *filename = gtk_file_chooser_get_filename (chooser);
+		save_file (filename);
+		g_free (filename);
+	}
+
+	gtk_widget_destroy (dialog);
+	g_free (data_folder);
+}
+
+void
+save_file_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	const gchar *filename;
+
+	filename = get_opened_file_name ();
+
+	if (filename == NULL) {
+		save_file_as_activated_cb (item, user_data);
+		return;
+	}
+
+	save_file (NULL);
+}
+
+void
+zoom_adjustment_value_changed_cb (
+	GtkAdjustment *adjustment,
+	gpointer user_data
+) {
+	sprite_drawing_area_set_scale_factor (
+		SPRITE_DRAWING_AREA (user_data),
+		gtk_adjustment_get_value (adjustment)
+	);
+	gtk_widget_queue_draw (GTK_WIDGET (user_data));
+}
+
+void
+tfview_file_activated_cb (
+	TreeFolderView *tfview,
+	gchar *filename,
+	gpointer user_data
+) {
+	open_file (filename);
+}
+
+void
+sourceview_buffer_modified_changed_cb (
+	GtkTextBuffer *textbuffer,
+	gpointer user_data
+) {
+	update_window_title ();
+}
+
+void
+new_file_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	open_file (NULL);
+}
+
+void
+view_reset_to_center_activate_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	sprite_drawing_area_set_center (
+		SPRITE_DRAWING_AREA (d_area),
+		0, 0
+	);
+
+	gtk_widget_queue_draw (d_area);
+}
+
+void
+show_tile_grid_toggled_cb (
+	GtkCheckMenuItem *item,
+	gpointer user_data
+) {
+	sda_layer_set_visible (
+		tile_grid_layer, 
+		gtk_check_menu_item_get_active (item)
+	);
+
+	gtk_widget_queue_draw (d_area);
+}
+
+void
+show_pixel_grid_toggled_cb (
+	GtkCheckMenuItem *item,
+	gpointer user_data
+) {
+	sda_layer_set_visible (
+		pixel_grid_layer, 
+		gtk_check_menu_item_get_active (item)
+	);
+
+	gtk_widget_queue_draw (d_area);
+}
+
+void
+menuitem_about_activate_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+) {
+	gtk_dialog_run (GTK_DIALOG (user_data));
+}
+
+void
+about_dialog_response_cb (
+	GtkDialog *dialog,
+	gint response_id,
+	gpointer user_data
+) {
+	if (response_id == GTK_RESPONSE_DELETE_EVENT) {
+		gtk_widget_hide (GTK_WIDGET (dialog));
+	}
+}
diff --git a/saedit/callbacks.h b/saedit/callbacks.h
new file mode 100644
index 0000000..7107353
--- /dev/null
+++ b/saedit/callbacks.h
@@ -0,0 +1,96 @@
+#ifndef _CALLBACKS_H_
+#define _CALLBACKS_H_
+
+void
+parse_buffer_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+);
+
+void
+action_changed_cb (GtkComboBox *cbox, gpointer user_data);
+
+void
+direction_changed_cb (GtkComboBox *cbox, gpointer user_data) {
+
+void 
+play_pause_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+);
+
+void 
+first_frame_clicked_cb (
+	GtkToolButton *button,
+	gpointer user_data
+);
+
+void
+choose_df_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+);
+
+void
+open_file_activated_cb (
+	GtkMenuIterm *item,
+	gpointer user_data
+);
+
+void
+save_file_activated_cb (
+	GtkMenuIterm *item,
+	gpointer user_data
+);
+
+void
+zoom_adjustment_value_changed_cb (
+	GtkAdjustment *adjustment,
+	gpointer user_data
+);
+
+void
+tfview_file_activated_cb (
+	TreeFolderView *tfview,
+	gchar *filename,
+	gpointer user_data
+);
+
+void
+new_file_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+);
+
+void
+save_file_as_activated_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+);
+
+void
+show_tile_grid_toggled_cb (
+	GtkCheckMenuItem *item,
+	gpointer user_data
+);
+
+void
+show_pixel_grid_toggled_cb (
+	GtkCheckMenuItem *item,
+	gpointer user_data
+);
+
+void
+menuitem_about_activate_cb (
+	GtkMenuItem *item,
+	gpointer user_data
+);
+
+void
+about_dialog_response_cb (
+	GtkDialog *dialog,
+	gint response_id,
+	gpointer user_data
+);
+
+#endif
diff --git a/saedit/common.c b/saedit/common.c
new file mode 100644
index 0000000..9bb8a30
--- /dev/null
+++ b/saedit/common.c
@@ -0,0 +1,22 @@
+#include "common.h"
+
+#include <stdlib.h>
+#include <errno.h>
+
+gboolean
+try_strtoint (
+	const gchar *str,
+	gint        *result
+) {
+	gchar *endptr;
+	gint   retval;
+
+	errno = 0;
+	retval = strtol (str, &endptr, 10);
+
+	if (*endptr != 0 || errno != 0)
+		return FALSE;
+
+	*result = retval;
+	return TRUE;
+}
diff --git a/saedit/common.h b/saedit/common.h
new file mode 100644
index 0000000..1715e41
--- /dev/null
+++ b/saedit/common.h
@@ -0,0 +1,12 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#include <glib.h>
+
+gboolean
+try_strtoint (
+	const gchar *str,
+	gint        *result
+);
+
+#endif
diff --git a/saedit/config.c b/saedit/config.c
new file mode 100644
index 0000000..1e20411
--- /dev/null
+++ b/saedit/config.c
@@ -0,0 +1,191 @@
+#include "config.h"
+#include "xml.h"
+#include <unistd.h>
+#include <sys/stat.h>
+
+static GKeyFile *_config_keyfile = NULL;
+
+gchar *
+_config_get_config_folder (void) {
+	return g_strjoin (
+		"/",
+		g_get_user_config_dir (),
+		"saedit2",
+		NULL
+	);
+}
+
+gchar *
+_config_get_key_file_path (void) {
+	gchar *dir = _config_get_config_folder ();
+	gchar *result;
+
+	result = g_strjoin (
+		"/",
+		dir,
+		"config.ini",
+		NULL
+	);
+
+	g_free (dir);
+	return result;
+}
+
+void
+config_keys_load () {
+	gchar *filename;
+
+	_config_keyfile = g_key_file_new ();
+
+	filename = _config_get_key_file_path ();
+
+	g_key_file_load_from_file (
+		_config_keyfile,
+		filename,
+		0,
+		NULL
+	);
+
+	g_free (filename);
+}
+
+gchar *
+config_keys_get_data_folder_path () {
+	gchar *result;
+
+	if (_config_keyfile == NULL)
+		config_keys_load ();
+	
+	result = g_key_file_get_value (
+		_config_keyfile,
+		"Default",
+		"Data Folder",
+		NULL
+	);
+
+	if (result == NULL)
+		result = g_strdup ("");
+
+	return result;
+}
+
+void
+config_keys_set_data_folder_path (const gchar *filename) {
+	if (_config_keyfile == NULL)
+		config_keys_load ();
+
+	g_key_file_set_value (
+		_config_keyfile,
+		"Default",
+		"Data Folder",
+		filename
+	);
+}
+
+gint
+config_keys_get_tile_size () {
+	/* TODO */
+	return 32;
+}
+
+void
+config_keys_save () {
+	gchar *filename;
+
+	if (_config_keyfile == NULL)
+		return;
+
+	filename = _config_get_config_folder ();
+	mkdir (filename, S_IRWXU);
+	g_free (filename);
+
+	filename = _config_get_key_file_path ();
+
+	g_key_file_save_to_file (
+		_config_keyfile,
+		filename,
+		NULL
+	);
+
+	g_free (filename);
+}
+
+static XMLNode *_config_paths_xml_root = NULL;
+
+void
+config_data_paths_load () {
+	gchar *filename;
+	gchar *df_path;
+
+	df_path = config_keys_get_data_folder_path ();
+
+	filename = g_strjoin (
+		"/",
+		df_path,
+		"paths.xml",
+		NULL
+	);
+
+	_config_paths_xml_root = xml_parse_file (filename);
+
+	g_free (df_path);
+	g_free (filename);
+}
+
+gchar *
+config_data_paths_get_sprites_path () {
+	XMLNode *node;
+	GList *list;
+	gchar *name;
+
+	if (_config_paths_xml_root == NULL)
+		config_data_paths_load ();
+
+	node = _config_paths_xml_root;
+	
+	if (node != NULL) {
+		list = node->sub_nodes;
+		while (TRUE) {
+			list = g_list_find_custom (
+					list,
+					"option",
+					xml_node_compare_with_name_func
+			);
+
+			if (list == NULL)
+				break;
+
+			name = xml_node_get_attr_value (list->data, "name");
+			if (name != NULL && g_strcmp0 (name, "sprites") == 0) {
+				g_free (name);
+				return xml_node_get_attr_value (list->data, "value");
+			}
+
+			g_free(name);
+			list = list->next;
+		}
+	}
+
+	return g_strdup ("");
+}
+
+gchar *
+config_data_path_get_full_sprite_path (const gchar *rel_path) {
+	gchar *data_folder, *sprites_path, *filename;
+
+	data_folder = config_keys_get_data_folder_path ();
+	sprites_path = config_data_paths_get_sprites_path ();
+
+	filename = g_strjoin (
+		"/",
+		data_folder,
+		sprites_path,
+		rel_path,
+		NULL
+	);
+
+	g_free (sprites_path);
+	g_free (data_folder);
+
+	return filename;
+}
diff --git a/saedit/config.h b/saedit/config.h
new file mode 100644
index 0000000..cae98bd
--- /dev/null
+++ b/saedit/config.h
@@ -0,0 +1,32 @@
+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+
+#include <glib.h>
+
+void
+config_keys_load (void);
+
+void
+config_keys_save (void);
+
+gchar *
+config_keys_get_data_folder_path (void);
+
+void
+config_keys_set_data_folder_path (
+	const gchar *filename
+);
+
+gint
+config_keys_get_tile_size (void);
+
+void
+config_data_paths_load (void);
+
+gchar *
+config_data_paths_get_sprites_path (void);
+
+gchar *
+config_data_path_get_full_sprite_path (const gchar *rel_path);
+
+#endif
diff --git a/saedit/context.c b/saedit/context.c
new file mode 100644
index 0000000..2a14de5
--- /dev/null
+++ b/saedit/context.c
@@ -0,0 +1,227 @@
+#include <gtk/gtk.h>
+#include "context.h"
+#include "imageset.h"
+#include "action.h"
+#include "animation.h"
+#include "xml.h"
+#include "config.h"
+#include "xmlsetup.h"
+
+struct _SpriteContext {
+	gchar *cdf_filename;
+	GList *imagesets;
+	GList *actions;
+	GList *includes;
+};
+
+SpriteContext *
+sprite_context_new (
+	const gchar *cdf_filename
+) {
+	SpriteContext *context = (SpriteContext *) g_new0 (SpriteContext, 1);
+	context->cdf_filename = g_strdup (cdf_filename);
+	return context;
+}
+
+void
+sprite_context_add_imageset (
+	SpriteContext *context,
+	XMLNode *node
+) {
+	Imageset *imgset;
+
+	g_return_if_fail (g_strcmp0 (node->name, "imageset") == 0);
+
+	imgset = imageset_new (node, context->cdf_filename);
+	if (imgset == NULL)
+		return;
+
+	if (g_list_find_custom (
+		context->imagesets, imgset,
+		(GCompareFunc) imageset_compare_by_name) != NULL
+	) {
+		imageset_free (imgset);
+		return;
+	}
+
+	context->imagesets = g_list_append (context->imagesets, imgset);
+}
+
+void
+sprite_context_add_action (
+	SpriteContext *context,
+	XMLNode *node,
+	gint included_from
+) {
+	Action *action;
+
+	g_return_if_fail (g_strcmp0 (node->name, "action") == 0);
+
+	action = action_new (context, node, included_from);
+	if (action == NULL)
+		return;
+
+	if (g_list_find_custom (
+		context->actions, action,
+		(GCompareFunc) action_compare_by_hp_and_name) != NULL
+	) {
+		action_free (action);
+		return;
+	}
+
+	context->actions = g_list_append (context->actions, action);
+}
+
+void
+sprite_context_add_sprite (
+	SpriteContext *context,
+	XMLNode *node,
+	gint included_from
+) {
+	GList *list;
+	g_return_if_fail (node != NULL);
+	g_return_if_fail (g_strcmp0 (node->name, "sprite") == 0);
+
+	list = node->sub_nodes;	
+	for (; list != NULL; list = g_list_next (list)) {
+		XMLNode *current = (XMLNode *) list->data;
+		gchar *name = current->name;
+		if (g_strcmp0 (name, "include") == 0) {
+			XMLNode *sprite;
+			gchar *filename, *file;
+
+			file = xml_node_get_attr_value (current, "file");
+			if (file == NULL) {
+				/* TODO: report error */
+				continue;
+			}
+
+			if (g_list_find_custom (
+				context->includes, file, 
+				(GCompareFunc) g_strcmp0) != NULL
+			) {
+				/* TODO: such file was already included */
+				g_free (file);
+				continue;
+			}
+
+			context->includes = g_list_append (
+				context->includes, file
+			);
+
+			filename = config_data_path_get_full_sprite_path (file);
+
+			sprite = xml_parse_file (filename);
+			g_free (filename);
+
+			if (sprite == NULL) {
+				/* TODO: report error */
+				continue;
+			}
+
+			if (g_strcmp0 (sprite->name, "sprite") != 0) {
+				/* TODO: report error */
+				continue;
+			}
+
+			if (included_from == -1)
+				included_from = current->line_no;
+
+			sprite_context_add_sprite (
+				context,
+				sprite,
+				included_from
+			);
+
+			xml_free (sprite);
+		} else
+		if (g_strcmp0 (name, "imageset") == 0) {
+			sprite_context_add_imageset (context, current);
+		} else
+		if (g_strcmp0 (name, "action") == 0) {
+			sprite_context_add_action (context, current, included_from);
+		} else
+		if (g_strcmp0 (name, "saedit") == 0) {
+			if (included_from == -1) { /* we are in the main context */
+				xml_setup_setup (current);
+			}
+		} else {
+			/* TODO: sprite contains something unknown */
+		}
+	}
+}
+
+Action *
+sprite_context_get_action (
+	const SpriteContext *context,
+	gint hp,
+	const gchar *name
+) {
+	GList *action = context->actions;
+
+	while (action != NULL) {
+		if (action_hp_and_name_equals (
+			(Action *) action->data,
+			hp,
+			name
+		)) {
+			return (Action *) action->data;
+		}
+
+		action = g_list_next (action);
+	}
+
+	return NULL;
+}
+
+Imageset *
+sprite_context_get_imageset (
+	const SpriteContext *context,
+	const gchar *name
+) {
+	GList *imageset = context->imagesets;
+
+	while (imageset != NULL) {
+		if (imageset_name_equals (
+			(Imageset *) imageset->data,
+			name
+		)) {
+			return (Imageset *) imageset->data;
+		}
+
+		imageset = g_list_next (imageset);
+	}
+
+	return NULL;
+}
+
+GList *
+sprite_context_get_actions (
+	const SpriteContext *context
+) {
+	return g_list_copy (context->actions);
+}
+
+void
+sprite_context_free (
+	SpriteContext *context
+) {
+	g_list_free_full (
+		context->imagesets,
+		(GDestroyNotify) imageset_free
+	);
+
+	g_list_free_full (
+		context->actions,
+		(GDestroyNotify) action_free
+	);
+
+	g_list_free_full (
+		context->includes,
+		(GDestroyNotify) g_free
+	);
+
+	g_free (context->cdf_filename);
+
+	g_free (context);
+}
diff --git a/saedit/context.h b/saedit/context.h
new file mode 100644
index 0000000..9d41fde
--- /dev/null
+++ b/saedit/context.h
@@ -0,0 +1,50 @@
+#ifndef CONTEXT_H
+#define CONTEXT_H
+
+#include "xml.h"
+#include "imageset.h"
+#include "action.h"
+
+typedef struct _SpriteContext SpriteContext;
+
+SpriteContext *
+sprite_context_new (
+	const gchar *client_data_folder
+);
+
+void
+sprite_context_add_sprite (
+	SpriteContext *context,
+	XMLNode *node,
+	gboolean is_include
+);
+
+Action *
+action_new (
+	const SpriteContext *context,
+	const XMLNode *node,
+	gint  included_from
+);
+
+Action *
+sprite_context_get_action (
+	const SpriteContext *context,
+	gint hp,
+	const gchar *name
+);
+
+Imageset *
+sprite_context_get_imageset (
+	const SpriteContext *context,
+	const gchar *name
+);
+
+GList *
+sprite_context_get_actions (
+	const SpriteContext *context
+);
+
+void
+sprite_context_free (SpriteContext *context);
+
+#endif
diff --git a/saedit/drawfuncs.c b/saedit/drawfuncs.c
new file mode 100644
index 0000000..97a769e
--- /dev/null
+++ b/saedit/drawfuncs.c
@@ -0,0 +1,107 @@
+#include "interactor.h"
+#include "drawfuncs.h"
+#include "spritedrawingarea.h"
+#include "config.h"
+
+void
+interactor_sprite_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+) {
+	const GdkPixbuf *sprite;
+	gint offsetX, offsetY;
+	Interactor *interactor = *((Interactor **) user_data);
+
+	if (interactor == NULL)
+		return;
+
+	sprite = interactor_get_sprite (interactor);
+
+	if (sprite == NULL)
+		return;
+
+	interactor_get_offset (interactor, &offsetX, &offsetY);
+
+	gdk_cairo_set_source_pixbuf (
+		cr, sprite,
+		offsetX,
+		offsetY + config_keys_get_tile_size () / 2
+	);
+	cairo_pattern_set_filter (
+		cairo_get_source (cr),
+		CAIRO_FILTER_NEAREST
+	);
+	cairo_paint (cr);
+}
+
+void
+background_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+) {
+	GdkRGBA *rgba = (GdkRGBA *) user_data;
+
+	gdk_cairo_set_source_rgba (cr, rgba);
+
+	cairo_rectangle (
+		cr,
+		-SPRITE_DRAWING_AREA_FIELD_SIZE,
+		-SPRITE_DRAWING_AREA_FIELD_SIZE,
+		2 * SPRITE_DRAWING_AREA_FIELD_SIZE,
+		2 * SPRITE_DRAWING_AREA_FIELD_SIZE
+	);
+	cairo_fill (cr);
+}
+
+void
+tile_grid_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+) {
+	gint x;
+	gint field_size = SPRITE_DRAWING_AREA_FIELD_SIZE;
+	gint tile_size = config_keys_get_tile_size ();
+
+	cairo_set_line_width (cr, 1.0);
+	cairo_set_operator (cr, CAIRO_OPERATOR_XOR);
+	cairo_set_source_rgba (cr, 0, 0, 0, 0.5);
+	cairo_translate (cr, 0.5, 0.5);
+
+	x = -tile_size / 2;
+	while (x >= -field_size)
+		x -= tile_size;
+
+	for (; x <= field_size; x += tile_size) {
+		cairo_move_to (cr, x, -field_size);
+		cairo_line_to (cr, x,  field_size);
+		cairo_move_to (cr, -field_size, x);
+		cairo_line_to (cr,  field_size, x);
+	}
+
+	cairo_stroke (cr);
+}
+
+void
+pixel_grid_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+) {
+	gint x;
+	gint field_size = SPRITE_DRAWING_AREA_FIELD_SIZE;
+
+	cairo_set_line_width (cr, 0.1);
+	cairo_set_source_rgb (cr, 0, 0, 0);
+	
+	for (x = -field_size; x <= field_size; ++x) {
+		cairo_move_to (cr, x, -field_size);
+		cairo_line_to (cr, x,  field_size);
+		cairo_move_to (cr, -field_size, x);
+		cairo_line_to (cr,  field_size, x);
+	}
+
+	cairo_stroke (cr);
+}
diff --git a/saedit/drawfuncs.h b/saedit/drawfuncs.h
new file mode 100644
index 0000000..1c1154e
--- /dev/null
+++ b/saedit/drawfuncs.h
@@ -0,0 +1,33 @@
+#ifndef _DRAW_FUNCS_H_
+#define _DRAW_FUNCS_H_
+
+#include "spritedrawingarea.h"
+
+void
+interactor_sprite_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+);
+
+void
+background_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+);
+
+void
+tile_grid_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+);
+
+void
+pixel_grid_layer_draw_func (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+);
+#endif
diff --git a/saedit/errors.c b/saedit/errors.c
new file mode 100644
index 0000000..ff3a710
--- /dev/null
+++ b/saedit/errors.c
@@ -0,0 +1,23 @@
+#include "errors.h"
+#include "main.h"
+
+void
+post_error (
+	const gchar *error_context,
+	const gchar *error_message
+) {
+	GtkWidget *dialog;
+
+	dialog = gtk_message_dialog_new_with_markup (
+		GTK_WINDOW (main_window),
+		GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
+		GTK_MESSAGE_ERROR,
+		GTK_BUTTONS_CLOSE,
+		"<b>%s error:</b> %s",
+		error_context,
+		error_message
+	);
+
+	gtk_dialog_run (GTK_DIALOG (dialog));
+	gtk_widget_destroy (dialog);
+}
diff --git a/saedit/errors.h b/saedit/errors.h
new file mode 100644
index 0000000..58b12e6
--- /dev/null
+++ b/saedit/errors.h
@@ -0,0 +1,12 @@
+#ifndef _ERRORS_H_
+#define _ERRORS_H_
+
+#include <glib.h>
+
+void
+post_error (
+	const gchar *error_context,
+	const gchar *error_message
+);
+
+#endif
diff --git a/saedit/file.c b/saedit/file.c
new file mode 100644
index 0000000..5496c86
--- /dev/null
+++ b/saedit/file.c
@@ -0,0 +1,103 @@
+#include <gtksourceview/gtksource.h>
+#include "errors.h"
+#include "buffer.h"
+#include "main.h"
+#include "file.h"
+
+#include <string.h>
+
+
+gchar *opened_file_name = NULL;
+
+gboolean
+show_unsaved_changes_dialog () {
+	gint result;
+	GtkWidget *dialog;
+
+	if (!buffer_get_modified ()) {
+		return FALSE;
+	}
+	
+	dialog = gtk_message_dialog_new (
+		GTK_WINDOW (main_window),
+		GTK_DIALOG_MODAL,
+		GTK_MESSAGE_WARNING,
+		GTK_BUTTONS_YES_NO,
+		"There are unsaved changes in the current file. "
+		"Do you wish to proceed?"
+	);
+
+	result = gtk_dialog_run (GTK_DIALOG (dialog));
+	gtk_widget_destroy (dialog);
+
+	return result == GTK_RESPONSE_NO;
+}
+
+void
+open_file (
+	const gchar *filename
+) {
+	gsize len;
+	gchar *text;
+
+	if (show_unsaved_changes_dialog ())
+		return;
+
+	release_context ();
+
+	if (filename != NULL) {
+		g_file_get_contents (
+			filename,
+			&text,
+			&len,
+			NULL
+		);
+	} else {
+		text = g_strdup ("");
+		len = 0;
+	}
+
+	g_free (opened_file_name);
+	opened_file_name = g_strdup (filename);
+
+	buffer_set_text (text, len);
+	buffer_set_modified (FALSE);
+
+	update_window_title ();
+
+	g_free (text);
+}
+
+void
+save_file (const gchar *filename) {
+	GError *error = NULL;
+	gboolean success;
+	gchar *text = buffer_get_text ();
+
+	success = g_file_set_contents (
+		filename == NULL ? opened_file_name : filename,
+		text,
+		strlen (text),
+		&error
+	);
+
+	if (!success) {
+		post_error ("Saving", error->message);
+	} else {
+		if (filename != NULL) {
+			g_free (opened_file_name);
+			opened_file_name = g_strdup (filename);
+		}
+
+		buffer_set_modified (FALSE);
+		update_window_title ();
+	}
+
+	g_free (text);
+}
+
+const gchar *
+get_opened_file_name () {
+	return opened_file_name;
+}
+
diff --git a/saedit/file.h b/saedit/file.h
new file mode 100644
index 0000000..9354879
--- /dev/null
+++ b/saedit/file.h
@@ -0,0 +1,16 @@
+#ifndef _FILE_H_
+#define _FILE_H_
+
+gboolean
+show_unsaved_changes_dialog (void);
+
+const gchar *
+get_opened_file_name (void);
+
+void
+open_file (const gchar *filename);
+
+void
+save_file (const gchar *filename);
+
+#endif
diff --git a/saedit/glade.sh b/saedit/glade.sh
new file mode 100755
index 0000000..77f5b18
--- /dev/null
+++ b/saedit/glade.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+GLADE_CATALOG_SEARCH_PATH=glade GLADE_MODULE_SEARCH_PATH=glade glade $*
diff --git a/saedit/glade/saedit-catalog.xml b/saedit/glade/saedit-catalog.xml
new file mode 100644
index 0000000..4f304a7
--- /dev/null
+++ b/saedit/glade/saedit-catalog.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glade-catalog name="saedit" library="saedit" depends="gtk+">
+	<glade-widget-classes>
+		<glade-widget-class
+			name="TreeFolderView"
+			generic-name="treefolderview"
+			title="TreeFolderView"
+		/>
+		<glade-widget-class
+			name="SpriteDrawingArea"
+			generic-name="spritedrawingarea"
+			title="SpriteDrawingArea"
+		/>
+		<glade-widget-class
+			name="GtkSourceBuffer"
+			generic-name="sourcebuffer"
+			title="GtkSourceBuffer"
+		/>
+	</glade-widget-classes>
+
+	<glade-widget-group name="saedit" title="SAEdit">
+		<glade-widget-class-ref name="TreeFolderView"/>
+		<glade-widget-class-ref name="SpriteDrawingArea"/>
+		<glade-widget-class-ref name="GtkSourceBuffer"/>
+	</glade-widget-group>
+</glade-catalog>
diff --git a/saedit/iface.ui b/saedit/iface.ui
new file mode 100644
index 0000000..dd1cab9
--- /dev/null
+++ b/saedit/iface.ui
@@ -0,0 +1,577 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.22.1 -->
+<interface>
+  <requires lib="gtk+" version="3.12"/>
+  <requires lib="gtksourceview" version="3.0"/>
+  <requires lib="saedit" version="0.0"/>
+  <object class="GtkAccelGroup" id="accelgroup1"/>
+  <object class="GtkFileFilter" id="filefilter-xml">
+    <patterns>
+      <pattern>*.xml</pattern>
+    </patterns>
+  </object>
+  <object class="GtkListStore" id="liststore-actions">
+    <columns>
+      <!-- column-name name -->
+      <column type="gchararray"/>
+      <!-- column-name hp -->
+      <column type="gint"/>
+      <!-- column-name id -->
+      <column type="gchararray"/>
+    </columns>
+  </object>
+  <object class="GtkSourceBuffer" id="sourceview-buffer">
+    <signal name="modified-changed" handler="sourceview_buffer_modified_changed_cb" swapped="no"/>
+  </object>
+  <object class="GtkAdjustment" id="zoom-adjustment">
+    <property name="lower">1</property>
+    <property name="upper">10</property>
+    <property name="value">1</property>
+    <property name="step_increment">0.10000000000000001</property>
+    <property name="page_increment">0.5</property>
+    <signal name="value-changed" handler="zoom_adjustment_value_changed_cb" object="drawingarea-main" swapped="no"/>
+  </object>
+  <object class="GtkWindow" id="window-main">
+    <property name="can_focus">False</property>
+    <property name="icon">logo.svg</property>
+    <signal name="delete-event" handler="window_main_delete_event_cb" swapped="no"/>
+    <signal name="destroy" handler="gtk_main_quit" swapped="no"/>
+    <child>
+      <placeholder/>
+    </child>
+    <child>
+      <object class="GtkBox" id="vbox1">
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkMenuBar" id="menubar3">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <child>
+              <object class="GtkMenuItem" id="menuitem9">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="label" translatable="yes">_File</property>
+                <property name="use_underline">True</property>
+                <child type="submenu">
+                  <object class="GtkMenu" id="menu7">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="accel_group">accelgroup1</property>
+                    <child>
+                      <object class="GtkImageMenuItem" id="menuitem-file-new">
+                        <property name="label">gtk-new</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_underline">True</property>
+                        <property name="use_stock">True</property>
+                        <signal name="activate" handler="new_file_activated_cb" swapped="no"/>
+                        <accelerator key="n" signal="activate" modifiers="GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkImageMenuItem" id="menuitem-file-open">
+                        <property name="label">gtk-open</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_underline">True</property>
+                        <property name="use_stock">True</property>
+                        <signal name="activate" handler="open_file_activated_cb" swapped="no"/>
+                        <accelerator key="o" signal="activate" modifiers="GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkImageMenuItem" id="menuitem-file-save">
+                        <property name="label">gtk-save</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_underline">True</property>
+                        <property name="use_stock">True</property>
+                        <signal name="activate" handler="save_file_activated_cb" swapped="no"/>
+                        <accelerator key="s" signal="activate" modifiers="GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkImageMenuItem" id="menuitem-file-save-as">
+                        <property name="label">gtk-save-as</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_underline">True</property>
+                        <property name="use_stock">True</property>
+                        <signal name="activate" handler="save_file_as_activated_cb" swapped="no"/>
+                        <accelerator key="s" signal="activate" modifiers="GDK_SHIFT_MASK | GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkSeparatorMenuItem" id="&lt;separator&gt;">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkMenuItem" id="menuitem-choose-df">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Choose data folder...</property>
+                        <signal name="activate" handler="choose_df_activated_cb" object="treefolderview-main" swapped="no"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkSeparatorMenuItem" id="separatormenuitem3">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkImageMenuItem" id="imagemenuitem25">
+                        <property name="label">gtk-quit</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_underline">True</property>
+                        <property name="use_stock">True</property>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkMenuItem" id="menuitem11">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="label" translatable="yes">_View</property>
+                <property name="use_underline">True</property>
+                <child type="submenu">
+                  <object class="GtkMenu">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <child>
+                      <object class="GtkMenuItem" id="menuitem-view-reset-to-center">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Reset to center</property>
+                        <property name="use_underline">True</property>
+                        <signal name="activate" handler="view_reset_to_center_activate_cb" swapped="no"/>
+                        <accelerator key="r" signal="activate" modifiers="GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkSeparatorMenuItem">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkCheckMenuItem" id="menuitem-show-tile-grid">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Tile grid</property>
+                        <property name="use_underline">True</property>
+                        <property name="active">True</property>
+                        <signal name="toggled" handler="show_tile_grid_toggled_cb" swapped="no"/>
+                        <accelerator key="g" signal="activate" modifiers="GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkCheckMenuItem" id="menuitem-show-pixel-grid">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Pixel grid</property>
+                        <property name="use_underline">True</property>
+                        <signal name="toggled" handler="show_pixel_grid_toggled_cb" swapped="no"/>
+                        <accelerator key="g" signal="activate" modifiers="GDK_SHIFT_MASK | GDK_CONTROL_MASK"/>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkMenuItem" id="menuitem12">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="label" translatable="yes">_Help</property>
+                <property name="use_underline">True</property>
+                <child type="submenu">
+                  <object class="GtkMenu" id="menu9">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <child>
+                      <object class="GtkImageMenuItem" id="menuitem-about">
+                        <property name="label">gtk-about</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_underline">True</property>
+                        <property name="use_stock">True</property>
+                        <signal name="activate" handler="menuitem_about_activate_cb" object="about-dialog" swapped="no"/>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkPaned" id="paned2">
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="position">1</property>
+            <child>
+              <object class="GtkScrolledWindow" id="scrolledwindow">
+                <property name="width_request">100</property>
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <child>
+                  <object class="TreeFolderView" id="treefolderview-main">
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="filter">filefilter-xml</property>
+                    <property name="filename">/home/</property>
+                    <signal name="file-activated" handler="tfview_file_activated_cb" object="sourceview-main" swapped="no"/>
+                    <child internal-child="selection">
+                      <object class="GtkTreeSelection" id="treeview-selection1"/>
+                    </child>
+                  </object>
+                </child>
+              </object>
+              <packing>
+                <property name="resize">False</property>
+                <property name="shrink">False</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkPaned" id="paned3">
+                <property name="width_request">100</property>
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="orientation">vertical</property>
+                <property name="position">100</property>
+                <child>
+                  <object class="GtkBox" id="box1">
+                    <property name="height_request">100</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="orientation">vertical</property>
+                    <child>
+                      <object class="GtkBox">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="SpriteDrawingArea" id="drawingarea-main">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="events">GDK_BUTTON_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_STRUCTURE_MASK</property>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="fill">True</property>
+                            <property name="position">0</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkScale" id="zoom-scale">
+                            <property name="visible">True</property>
+                            <property name="can_focus">True</property>
+                            <property name="orientation">vertical</property>
+                            <property name="adjustment">zoom-adjustment</property>
+                            <property name="inverted">True</property>
+                            <property name="restrict_to_fill_level">False</property>
+                            <property name="round_digits">1</property>
+                            <property name="has_origin">False</property>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="fill">True</property>
+                            <property name="position">1</property>
+                          </packing>
+                        </child>
+                      </object>
+                      <packing>
+                        <property name="expand">True</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkBox" id="box2">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="GtkLabel" id="label1">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Action:</property>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="fill">True</property>
+                            <property name="padding">5</property>
+                            <property name="position">0</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkComboBox" id="cbox-actions">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="model">liststore-actions</property>
+                            <property name="id_column">2</property>
+                            <signal name="changed" handler="action_changed_cb" swapped="no"/>
+                            <child>
+                              <object class="GtkCellRendererText" id="cellrenderertext1"/>
+                              <attributes>
+                                <attribute name="text">0</attribute>
+                              </attributes>
+                            </child>
+                            <child>
+                              <object class="GtkCellRendererText" id="cellrenderertext2">
+                                <property name="xalign">1</property>
+                                <property name="alignment">right</property>
+                              </object>
+                              <attributes>
+                                <attribute name="text">1</attribute>
+                              </attributes>
+                            </child>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="fill">True</property>
+                            <property name="position">1</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkLabel" id="label2">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Direction: </property>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="fill">True</property>
+                            <property name="padding">5</property>
+                            <property name="position">2</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkComboBoxText" id="cboxtext-directions">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="button_sensitivity">on</property>
+                            <signal name="changed" handler="direction_changed_cb" swapped="no"/>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="fill">True</property>
+                            <property name="position">3</property>
+                          </packing>
+                        </child>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">1</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkToolbar" id="toolbar-animation">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="GtkToolButton" id="button-parse-buffer">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Parse buffer</property>
+                            <property name="stock_id">gtk-execute</property>
+                            <signal name="clicked" handler="parse_buffer_clicked_cb" swapped="no"/>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkSeparatorToolItem" id="&lt;separator&gt;1">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkToolButton" id="button-anim-first">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">First frame</property>
+                            <property name="stock_id">gtk-goto-first</property>
+                            <signal name="clicked" handler="first_frame_clicked_cb" swapped="no"/>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkToolButton" id="button-anim-prev">
+                            <property name="visible">True</property>
+                            <property name="sensitive">False</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Previous frame</property>
+                            <property name="stock_id">gtk-go-back</property>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkToolButton" id="button-anim-play">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Play/Pause</property>
+                            <property name="use_underline">True</property>
+                            <property name="icon_name">media-playback-start</property>
+                            <signal name="clicked" handler="play_pause_clicked_cb" swapped="no"/>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkToolButton" id="button-anim-next">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Next frame</property>
+                            <property name="use_underline">True</property>
+                            <property name="stock_id">gtk-go-forward</property>
+                            <signal name="clicked" handler="next_frame_clicked_cb" swapped="no"/>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkToolButton" id="button-anim-last">
+                            <property name="visible">True</property>
+                            <property name="sensitive">False</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Last frame</property>
+                            <property name="use_underline">True</property>
+                            <property name="stock_id">gtk-goto-last</property>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="homogeneous">True</property>
+                          </packing>
+                        </child>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">2</property>
+                      </packing>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="resize">True</property>
+                    <property name="shrink">False</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkScrolledWindow" id="scrolledwindow1">
+                    <property name="width_request">100</property>
+                    <property name="height_request">100</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <child>
+                      <object class="GtkSourceView" id="sourceview-main">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="left_margin">2</property>
+                        <property name="right_margin">2</property>
+                        <property name="buffer">sourceview-buffer</property>
+                        <property name="monospace">True</property>
+                        <property name="show_line_numbers">True</property>
+                        <property name="show_line_marks">True</property>
+                        <property name="tab_width">4</property>
+                        <property name="indent_width">4</property>
+                        <property name="auto_indent">True</property>
+                        <property name="insert_spaces_instead_of_tabs">True</property>
+                      </object>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="resize">True</property>
+                    <property name="shrink">False</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
+                <property name="resize">True</property>
+                <property name="shrink">False</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+  <object class="GtkAboutDialog" id="about-dialog">
+    <property name="can_focus">False</property>
+    <property name="destroy_with_parent">True</property>
+    <property name="type_hint">dialog</property>
+    <property name="transient_for">window-main</property>
+    <property name="program_name">Sprite Animation Editor</property>
+    <property name="version">alpha2</property>
+    <property name="copyright" translatable="yes">Copyleft (ɔ) Vasily_Makarov</property>
+    <property name="comments" translatable="yes">Editor, parser and player for the TMW/Evol project animations. Greatly inspired by the project developers team.</property>
+    <property name="authors">Danil "Vasily Makarov" Sagunov &lt;vasily@evolonline.org&gt;</property>
+    <property name="logo">logo.svg</property>
+    <property name="license_type">gpl-3-0</property>
+    <signal name="response" handler="about_dialog_response_cb" swapped="no"/>
+    <child>
+      <placeholder/>
+    </child>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can_focus">False</property>
+            <property name="layout_style">end</property>
+            <child>
+              <placeholder/>
+            </child>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <placeholder/>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>
diff --git a/saedit/imageset.c b/saedit/imageset.c
new file mode 100644
index 0000000..9ae2ea0
--- /dev/null
+++ b/saedit/imageset.c
@@ -0,0 +1,130 @@
+#include "imageset.h"
+#include <string.h>
+
+struct _Imageset {
+	gchar *name;
+	gint width, height;
+	gint offsetX, offsetY;
+
+	GdkPixbuf *pixbuf;
+};
+
+Imageset *
+imageset_new (
+	const XMLNode *node,
+	const gchar *cdf_filename
+) {
+	Imageset *imgset; 
+	gchar    *src, *filename;
+	GError   *err = NULL;
+	gboolean  fail = FALSE;
+
+	g_return_val_if_fail (g_strcmp0 (node->name, "imageset") == 0, NULL);
+
+	imgset = (Imageset *) g_new0 (Imageset, 1);
+
+	imgset->name = xml_node_get_attr_value (node, "name");
+	if (imgset->name == NULL) {
+		/* TODO: report error */
+		fail = TRUE;
+	}
+
+	src = xml_node_get_attr_value (node, "src");
+	if (src == NULL) {
+		/* TODO: report error */
+		fail = TRUE;
+	} else {
+		gchar *delim = strchr (src, '|');
+		if (delim != NULL)
+			*delim = 0;
+		/* TODO: process palettes? */
+	}
+
+	imgset->width  = xml_node_get_int_attr_value (node,  "width", -1);
+	imgset->height = xml_node_get_int_attr_value (node, "height", -1);
+	if (imgset->width <= 0 || imgset->height <= 0) {
+		/* TODO: report error */
+		fail = TRUE;
+	}
+
+	imgset->offsetX = xml_node_get_int_attr_value (node, "offsetX", 0);
+	imgset->offsetY = xml_node_get_int_attr_value (node, "offsetY", 0);
+
+	filename = g_strconcat (cdf_filename, "/", src, NULL);
+	imgset->pixbuf = gdk_pixbuf_new_from_file (filename, &err);
+
+	if (imgset->pixbuf == NULL) {
+		/* TODO handle err and report error */
+		fail = TRUE;
+	}
+
+	if (fail) {
+		imageset_free (imgset);
+		return NULL;
+	}
+
+	return imgset;
+}
+
+gint
+imageset_compare_by_name (
+	const Imageset *first,
+	const Imageset *second
+) {
+	return g_strcmp0 (first->name, second->name);
+}
+
+GdkPixbuf *
+imageset_get_sprite_by_index (
+	const Imageset *imageset,
+	gint index
+) {
+	gint w = gdk_pixbuf_get_width (imageset->pixbuf);
+	w /= imageset->width;
+
+	g_return_val_if_fail (index >= 0, NULL);
+
+	return gdk_pixbuf_new_subpixbuf (
+		imageset->pixbuf,
+		(index % w) * imageset->width,
+		(index / w) * imageset->height,
+		imageset->width,
+		imageset->height
+	);
+}
+
+void
+imageset_free (Imageset *imgset) {
+	g_free (imgset->name);
+	if (imgset->pixbuf != NULL)
+		g_object_unref (imgset->pixbuf);
+	g_free (imgset);
+}
+
+gboolean
+imageset_name_equals (
+	const Imageset *imageset,
+	const gchar *name
+) {
+	return g_strcmp0 (imageset->name, name) == 0;
+}
+
+void
+imageset_get_offset (
+	const Imageset *imageset,
+	gint *offsetX,
+	gint *offsetY
+) {
+	*offsetX = imageset->offsetX;
+	*offsetY = imageset->offsetY;
+}
+
+void
+imageset_get_size (
+	const Imageset *imageset,
+	gint *width,
+	gint *height
+) {
+	*width = imageset->width;
+	*height = imageset->height;
+}
diff --git a/saedit/imageset.h b/saedit/imageset.h
new file mode 100644
index 0000000..3496d65
--- /dev/null
+++ b/saedit/imageset.h
@@ -0,0 +1,50 @@
+#ifndef IMAGESET_H
+#define IMAGESET_H
+
+#include <gdk/gdk.h>
+#include "common.h"
+#include "xml.h"
+
+typedef struct _Imageset Imageset;
+
+Imageset *
+imageset_new (
+	const XMLNode *node,
+	const gchar *cdf_filename
+);
+
+void
+imageset_free (Imageset *imageset);
+
+gint
+imageset_compare_by_name (
+	const Imageset *first,
+	const Imageset *second
+);
+
+GdkPixbuf *
+imageset_get_sprite_by_index (
+	const Imageset *imageset,
+	gint index
+);
+
+gboolean
+imageset_name_equals (
+	const Imageset *imageset,
+	const gchar *name
+);
+
+void
+imageset_get_offset (
+	const Imageset *imageset,
+	gint *offsetX,
+	gint *offsetY
+);
+
+void
+imageset_get_size (
+	const Imageset *imageset,
+	gint *width,
+	gint *height
+);
+#endif
diff --git a/saedit/interactor.c b/saedit/interactor.c
new file mode 100644
index 0000000..85e55fa
--- /dev/null
+++ b/saedit/interactor.c
@@ -0,0 +1,439 @@
+#include <glib.h>
+#include <stdlib.h>
+
+#include "interactor.h"
+#include "imageset.h"
+#include "action.h"
+#include "animation.h"
+#include "errors.h"
+
+struct _Interactor {
+	const SpriteContext *context;
+	const Action *action;
+	const Animation *animation;
+	gchar *direction;
+	gboolean rand_checked;
+	GList *element;
+	gint delay;
+
+	guint loop_tag;
+	guint tick_length;
+
+	InteractionUpdatedFunc updated_cb;
+
+	GList *repeaters;
+};
+
+static gboolean
+interactor_updated_func (Interactor *interactor) {
+	g_return_val_if_fail (interactor->updated_cb != NULL, FALSE);
+
+	interactor->updated_cb (interactor);
+	return FALSE;
+}
+
+static void
+interactor_updated (Interactor *interactor) {
+	if (interactor->updated_cb == NULL)
+		return;
+
+	g_main_context_invoke (
+		NULL,
+		(GSourceFunc) interactor_updated_func,
+		interactor
+	);
+}
+
+static AnimElement *
+interactor_get_element (const Interactor *interactor) {
+	if (interactor->element == NULL)
+		return NULL;
+	return (AnimElement *) interactor->element->data;
+}
+
+Interactor *
+interactor_new (
+	const SpriteContext *context
+) {
+	Interactor *interactor = g_new0 (Interactor, 1);
+
+	interactor->context = context;
+	interactor->repeaters = NULL;
+	return interactor;
+}
+
+gboolean
+interactor_reset_animation (
+	Interactor *interactor
+) {
+	GList *l;
+
+	for (l = interactor->repeaters; l != NULL; l = l->next)
+		interactor_reset_animation ((Interactor *) l->data);
+
+	if (interactor->action == NULL)
+		return FALSE;
+
+	interactor->animation = action_get_animation (
+		interactor->action,
+		interactor->direction
+	);
+
+	g_return_val_if_fail (interactor->animation != NULL, FALSE);
+
+	interactor->element = interactor->animation->elements;
+	interactor->delay = 0;
+	interactor->rand_checked = TRUE;
+	interactor_updated (interactor);
+	interactor_play (interactor, 0);
+
+	return TRUE;
+}
+
+gboolean
+interactor_set_action (
+	Interactor *interactor,
+	gint hp,
+	const gchar *name
+) {
+	Action *action;
+	GList *l;
+
+	for (l = interactor->repeaters; l != NULL; l = l->next)
+		interactor_set_action ((Interactor *) l->data, hp, name);
+
+	if (	
+		interactor->action != NULL &&
+		action_hp_and_name_equals (interactor->action, hp, name)
+	)
+		return FALSE;
+
+	action = sprite_context_get_action (
+		interactor->context, hp, name
+	);
+
+	if (action == NULL)
+		return FALSE;
+
+	interactor->action = action;
+	return interactor_reset_animation (interactor);
+}
+
+gboolean
+interactor_set_direction (
+	Interactor *interactor,
+	const gchar *direction
+) {
+	GList *l;
+
+	for (l = interactor->repeaters; l != NULL; l = l->next)
+		interactor_set_direction ((Interactor *) l->data, direction);
+
+	if (g_strcmp0 (interactor->direction, direction) != 0) {
+		if (interactor->direction != NULL)
+			g_free (interactor->direction);
+
+		interactor->direction = g_strdup (direction);
+		return interactor_reset_animation (interactor);
+	}
+
+	return FALSE;
+} 
+
+static gboolean
+_animation_element_rand_check (
+	const AnimElement *element
+) {
+	if (element->rand == 100) return TRUE;
+	if (element->rand == 0)   return FALSE;
+	return rand() % 100 < element->rand;
+}
+
+gboolean
+interactor_play (
+	Interactor *interactor,
+	gint time
+) {
+	gboolean updated = FALSE;
+	GList *l;
+
+	for (l = interactor->repeaters; l != NULL; l = l->next)
+		interactor_play ((Interactor *) l->data, time);
+	
+	g_return_val_if_fail (time >= 0, FALSE);
+
+	if (interactor->action == NULL)
+		return FALSE;
+	if (interactor->animation == NULL)
+		return FALSE;
+	g_return_val_if_fail (interactor->element != NULL, FALSE);
+
+	interactor->delay += time;
+
+	while (TRUE) {
+		AnimElement *element = interactor_get_element (interactor);
+		gint e_delay = element->delay;
+
+		if (	interactor->rand_checked || 
+			_animation_element_rand_check (element)
+		) {
+			interactor->rand_checked = TRUE;
+
+			if (interactor->delay < e_delay)
+				break;
+
+			interactor->delay -= e_delay;
+			interactor->rand_checked = FALSE;
+			updated = TRUE;
+
+			if (element->type == ELEMENT_END) {
+				interactor_reset_animation (interactor);
+				return FALSE;
+			} else
+
+			if (element->type == ELEMENT_FRAME) {
+				if (e_delay == 0)
+					break;
+			} else
+
+			if (element->type == ELEMENT_PAUSE) {
+				if (e_delay == 0)
+					break;
+			} else
+
+			if (element->type == ELEMENT_JUMP) {
+				gint delay = interactor->delay;
+
+				gboolean found = interactor_set_action (
+					interactor,
+					interactor->action->hp,
+					element->str
+				);
+
+				if (!found) {
+					/* TODO: report about this */
+					return FALSE;
+				}
+
+				return interactor_play (
+					interactor,
+					delay
+				);
+			} else
+
+			if (element->type == ELEMENT_LABEL) {
+
+			} else
+
+			if (element->type == ELEMENT_GOTO) {
+				GList *nelem = 
+					interactor->animation->elements;
+
+				while (nelem != NULL) {
+					AnimElement *current =
+						(AnimElement *) nelem->data;
+					if (current->type == ELEMENT_LABEL) {
+						if (g_strcmp0 (
+							current->str,
+							element->str) == 0
+						)
+							break;
+					}
+
+					nelem = g_list_next (nelem);
+				}
+
+				if (nelem != NULL) {
+					interactor->element = nelem;
+					continue;
+				} else {
+					post_error ("Playback", "Specified goto label not found");
+					return FALSE;
+				}
+			}
+		}
+
+		interactor->element = g_list_next (interactor->element);
+		if (interactor->element == NULL)
+			interactor->element = interactor->animation->elements;
+	}
+
+	if (updated)
+		interactor_updated (interactor);
+
+	return TRUE;
+}
+
+const GdkPixbuf *
+interactor_get_sprite (const Interactor *interactor) {
+	if (interactor->element == NULL)
+		return NULL;
+	return interactor_get_element (interactor)->sprite;
+}
+
+void
+interactor_get_offset (
+	const Interactor *interactor,
+	gint *offsetX,
+	gint *offsetY
+) {
+	AnimElement *element = interactor_get_element (interactor);
+	if (element == NULL)
+		return;
+
+	*offsetX = element->offsetX;
+	*offsetY = element->offsetY;
+}
+
+gboolean
+interactor_loop_tick (Interactor *interactor) {
+	gboolean result = interactor_play (
+		interactor, 
+		interactor->tick_length
+	);
+
+	if (result == FALSE) {
+		interactor->loop_tag = 0;
+		interactor_updated (interactor);
+	}
+
+	return result;
+}
+
+void
+interactor_loop_start (
+	Interactor *interactor,
+	const guint interval,
+	const guint tick_length
+) {
+	if (interactor->loop_tag != 0)
+		return;
+	
+	interactor->tick_length = tick_length;
+	interactor->loop_tag = g_timeout_add (
+		interval,
+		(GSourceFunc) interactor_loop_tick,
+		interactor
+	);
+
+	interactor_updated (interactor);
+}
+
+gboolean
+interactor_loop_stop (Interactor *interactor) {
+	if (interactor->loop_tag == 0)
+		return FALSE;
+
+	g_source_remove (interactor->loop_tag);
+	interactor->loop_tag = 0;
+
+	interactor_updated (interactor);
+
+	return TRUE;
+}
+
+gboolean
+interactor_loop_running (
+	const Interactor *interactor
+) {
+	if (interactor == NULL)
+		return FALSE;
+	return interactor->loop_tag != 0;
+}
+
+void
+interactor_free (Interactor *interactor) {
+	interactor_loop_stop (interactor);
+	g_list_free (interactor->repeaters);
+	g_free (interactor);
+}
+
+void
+interactor_free_with_repeaters (Interactor *interactor) {
+	interactor_loop_stop (interactor);
+
+	g_list_free_full (
+		interactor->repeaters,
+		(GDestroyNotify) interactor_free_with_repeaters
+	);
+
+	g_free (interactor);
+}
+
+void
+interactor_set_updated_callback (
+	Interactor *interactor,
+	InteractionUpdatedFunc callback
+) {
+	interactor->updated_cb = callback;
+}
+
+gint
+interactor_get_line_no (
+	Interactor *interactor
+) {
+	AnimElement *element = interactor_get_element (interactor);
+
+	if (element == NULL)
+		return -1;
+
+	return element->line_no;
+}
+
+const gchar *
+interactor_get_animation_direction (
+	const Interactor *interactor
+) {
+	if (interactor->animation == NULL)
+		return NULL;
+	return interactor->animation->direction;
+}
+
+const gchar *
+interactor_get_direction (
+	const Interactor *interactor
+) {
+	return interactor->direction;
+}
+
+gboolean
+interactor_get_action_hp_and_name (
+	const Interactor *interactor,
+	gint *hp,
+	gchar **name
+) {
+	if (interactor->action == NULL)
+		return FALSE;
+
+	action_get_hp_and_name (interactor->action, hp, name);
+	return TRUE;
+}
+
+void
+interactor_skip_current_frame (
+	Interactor *interactor
+) {
+	AnimElement *element;
+	
+	interactor_loop_stop (interactor);
+	element = interactor_get_element (interactor);
+
+	if (element != NULL) {
+		g_return_if_fail (interactor->delay <= element->delay);
+		interactor_play (
+			interactor,
+			element->delay - interactor->delay
+		);
+	}
+}
+
+void
+interactor_add_repeater (
+	Interactor *interactor,
+	Interactor *repeater
+) {
+	interactor->repeaters = g_list_append (
+		interactor->repeaters,
+		repeater
+	);
+}
diff --git a/saedit/interactor.h b/saedit/interactor.h
new file mode 100644
index 0000000..5d0ddfc
--- /dev/null
+++ b/saedit/interactor.h
@@ -0,0 +1,110 @@
+#ifndef _INTERACTOR_H_
+#define _INTERACTOR_H_
+
+#include "context.h"
+
+typedef struct _Interactor Interactor;
+
+Interactor *
+interactor_new (
+	const SpriteContext *context
+);
+
+gboolean
+interactor_set_action (
+	Interactor *interactor,
+	gint hp,
+	const gchar *name
+);
+
+gboolean
+interactor_reset_animation (
+	Interactor *interactor
+);
+
+gboolean
+interactor_set_direction (
+	Interactor *interactor,
+	const gchar *direction
+);
+
+gboolean
+interactor_play (
+	Interactor *interactor,
+	gint time
+);
+
+const GdkPixbuf *
+interactor_get_sprite (const Interactor *interactor);
+
+void
+interactor_loop_start (
+	Interactor *interactor,
+	const guint interval,
+	const guint tick_length
+);
+
+gboolean
+interactor_loop_stop (Interactor *interactor);
+
+void
+interactor_free (Interactor *interactor);
+
+void
+interactor_free_with_repeaters (Interactor *interactor);
+
+typedef void
+(*InteractionUpdatedFunc) (Interactor *interactor);
+
+void
+interactor_set_updated_callback (
+	Interactor *interactor,
+	InteractionUpdatedFunc callback
+);
+
+void
+interactor_get_offset (
+	const Interactor *interactor,
+	gint *offsetX,
+	gint *offsetY
+);
+
+gint
+interactor_get_line_no (
+	Interactor *interactor
+);
+
+const gchar *
+interactor_get_animation_direction (
+	const Interactor *interactor
+);
+
+const gchar *
+interactor_get_direction (
+	const Interactor *interactor
+);
+
+gboolean
+interactor_get_action_hp_and_name (
+	const Interactor *interactor,
+	gint *hp,
+	gchar **name
+);
+
+gboolean
+interactor_loop_running (
+	const Interactor *interactor
+);
+
+void
+interactor_skip_current_frame (
+	Interactor *interactor
+);
+
+void
+interactor_add_repeater (
+	Interactor *interactor,
+	Interactor *repeater
+);
+
+#endif
diff --git a/saedit/logo.svg b/saedit/logo.svg
new file mode 100644
index 0000000..a68864a
--- /dev/null
+++ b/saedit/logo.svg
@@ -0,0 +1,657 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="256"
+   height="256"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   sodipodi:docname="logo.svg">
+  <defs
+     id="defs4">
+    <linearGradient
+       y2="445.16745"
+       x2="726.91016"
+       y1="388.45044"
+       x1="726.91016"
+       gradientTransform="matrix(0.2400412,0,0,1.0091871,-59.607089,50.7501)"
+       gradientUnits="userSpaceOnUse"
+       id="linearGradient2980"
+       xlink:href="#linearGradient3164"
+       inkscape:collect="always" />
+    <linearGradient
+       y2="445.16745"
+       x2="726.91016"
+       y1="388.45044"
+       x1="726.91016"
+       gradientTransform="matrix(1.2809327,0,0,1.0091871,-753.11664,-9.2499)"
+       gradientUnits="userSpaceOnUse"
+       id="linearGradient2978"
+       xlink:href="#linearGradient3164"
+       inkscape:collect="always" />
+    <radialGradient
+       r="7.1330748"
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+       inkscape:collect="always" />
+    <linearGradient
+       y2="502.34891"
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+           inkscape:connector-curvature="0" />
+      </g>
+    </g>
+  </g>
+</svg>
diff --git a/saedit/main.c b/saedit/main.c
new file mode 100644
index 0000000..103e0c4
--- /dev/null
+++ b/saedit/main.c
@@ -0,0 +1,235 @@
+#include <gtksourceview/gtksource.h>
+#include "xml.h"
+#include "config.h"
+#include "spritedrawingarea.h"
+#include "action.h"
+#include "errors.h"
+#include "file.h"
+#include "buffer.h"
+#include "xmlsetup.h"
+#include "drawfuncs.h"
+
+#include "main.h"
+#include <string.h>
+
+void
+intr_updated (Interactor *interactor) {
+	gtk_widget_queue_draw (d_area);
+
+	gtk_tool_button_set_icon_name (
+		GTK_TOOL_BUTTON (tbtn_play),
+		interactor_loop_running (interactor) ?
+			"media-playback-pause" :
+			"media-playback-start"
+	);
+
+	if (interactor != NULL) {
+		gboolean result;
+		gint hp;
+		gchar *id, *name;
+
+		buffer_mark_line (
+			interactor_get_line_no (interactor) - 1
+		);
+
+		result = interactor_get_action_hp_and_name (
+			interactor,
+			&hp, &name
+		);
+
+		if (!result)
+			return;
+
+		id = get_action_id (hp, name);
+		gtk_combo_box_set_active_id (cb_actions, id);
+		g_free (id);
+
+		gtk_combo_box_set_active_id (
+			GTK_COMBO_BOX (cb_directions),
+			interactor_get_animation_direction (interactor)
+		);
+	} else
+		buffer_mark_line (-1);
+}
+
+void
+release_context () {
+	xml_setup_clear ();
+
+	if (interactor != NULL) {
+		interactor_free (interactor);
+		interactor = NULL;
+		intr_updated (interactor);
+	}
+
+	gtk_combo_box_text_remove_all (cb_directions);
+	gtk_list_store_clear (store_actions);
+
+	if (context != NULL) {
+		sprite_context_free (context);
+		context = NULL;
+	}
+}
+
+void
+update_window_title () {
+	gchar *title, *data_folder, *file_name;
+	const gchar *opened_file_name;
+
+	gboolean modified = buffer_get_modified ();
+	data_folder = config_keys_get_data_folder_path ();
+	opened_file_name = get_opened_file_name ();
+
+	if (
+		opened_file_name != NULL && 
+		g_str_has_prefix (opened_file_name, data_folder)
+	) {
+		file_name = g_strconcat (
+			"<Data Folder>",
+			opened_file_name + strlen (data_folder),
+			NULL
+		);
+	} else {
+		file_name = g_strdup (opened_file_name);
+	}
+
+	if (file_name == NULL) {
+		file_name = g_strdup ("New animation");
+	}
+
+	title = g_strconcat (
+		modified ? "*" : "",
+		file_name,
+		NULL
+	);
+
+	gtk_window_set_title (GTK_WINDOW (main_window), title);
+	g_free (title);
+	g_free (file_name);
+}
+
+void
+setup_source_view (GtkSourceView *source_view) {
+	GtkSourceLanguageManager *langman;
+	GtkSourceMarkAttributes  *attrs;
+	
+	langman = gtk_source_language_manager_get_default();
+
+	gtk_source_buffer_set_language (
+		GTK_SOURCE_BUFFER (
+			gtk_text_view_get_buffer (
+				GTK_TEXT_VIEW (source_view)
+			)
+		),
+		gtk_source_language_manager_get_language (langman, "xml")
+	);
+
+	attrs = gtk_source_mark_attributes_new ();
+	gtk_source_mark_attributes_set_icon_name (attrs, "media-record");
+	gtk_source_view_set_mark_attributes (
+		source_view, "active-line", attrs, 0 
+	);
+
+	gtk_widget_show_all (GTK_WIDGET (source_view));
+}
+
+GtkWidget *
+gtk_builder_get_widget (
+	GtkBuilder *builder,
+	const gchar *name
+) {
+	return GTK_WIDGET (
+		gtk_builder_get_object (builder, name)
+	);
+}
+
+gboolean
+window_main_delete_event_cb (
+	GtkWidget *widget,
+	GdkEvent *event,
+	gpointer user_data
+) {
+	return show_unsaved_changes_dialog ();
+}
+
+int
+main (int argc, char *argv[]) {
+	GtkBuilder *builder;
+	gchar *path;
+
+	gtk_init (&argc, &argv);
+
+	builder = gtk_builder_new ();
+	gtk_builder_add_from_file (builder, "iface.ui", NULL);
+	gtk_builder_connect_signals (builder, NULL);
+
+	main_window   = gtk_builder_get_widget (builder,         "window-main");
+	tf_view       = gtk_builder_get_widget (builder, "treefolderview-main");
+	d_area        = gtk_builder_get_widget (builder,    "drawingarea-main");
+	source_view   = gtk_builder_get_widget (builder,     "sourceview-main");
+	tbtn_play     = gtk_builder_get_widget (builder,    "button-anim-play");
+
+	cb_actions    = GTK_COMBO_BOX (
+		gtk_builder_get_widget (builder,     "cbox-actions")
+	);
+	cb_directions = GTK_COMBO_BOX_TEXT (
+		gtk_builder_get_widget (builder,  "cboxtext-directions")
+	);
+
+	store_actions = GTK_LIST_STORE (
+		gtk_builder_get_object (builder, "liststore-actions")
+	);
+
+	zoom_adj = GTK_ADJUSTMENT (
+		gtk_builder_get_object (builder, "zoom-adjustment")
+	);
+
+	g_object_unref (builder);
+
+	setup_source_view (GTK_SOURCE_VIEW (source_view));
+
+	update_window_title ();
+
+	path = config_keys_get_data_folder_path ();
+	tree_folder_view_set_filename (
+		TREE_FOLDER_VIEW (tf_view),
+		path
+	);
+	g_free (path);
+
+	sprite_drawing_area_add_layer (
+		SPRITE_DRAWING_AREA (d_area),
+		sda_layer_new (interactor_sprite_layer_draw_func, &interactor)
+	);
+
+	tile_grid_layer = sda_layer_new (
+		tile_grid_layer_draw_func,
+		NULL
+	);
+
+	sda_layer_set_z_index (tile_grid_layer, 512);
+
+	sprite_drawing_area_add_layer (
+		SPRITE_DRAWING_AREA (d_area),
+		tile_grid_layer
+	);
+
+	pixel_grid_layer = sda_layer_new (
+		pixel_grid_layer_draw_func,
+		NULL
+	);
+
+	sda_layer_set_z_index (pixel_grid_layer, 512 + 1);
+	sda_layer_set_visible (pixel_grid_layer, FALSE);
+
+	sprite_drawing_area_add_layer (
+		SPRITE_DRAWING_AREA (d_area),
+		pixel_grid_layer
+	);
+
+	gtk_widget_show_all (main_window);
+
+	gtk_main();
+	
+	return 0;
+}
diff --git a/saedit/main.h b/saedit/main.h
new file mode 100644
index 0000000..1e482f3
--- /dev/null
+++ b/saedit/main.h
@@ -0,0 +1,51 @@
+#ifndef _MAIN_H_
+#define _MAIN_H_
+
+#include <gtk/gtk.h>
+#include "treefolderview.h"
+#include "context.h"
+#include "interactor.h"
+#include "spritedrawingarea.h"
+
+GtkWidget  *main_window;
+GtkWidget  *d_area;
+GtkWidget  *source_view;
+GtkWidget  *tf_view;
+GtkWidget  *tbtn_play;
+
+GtkComboBox     *cb_actions;
+GtkComboBoxText *cb_directions;
+GtkListStore    *store_actions;
+GtkAdjustment	*zoom_adj;
+
+SpriteContext *context;
+Interactor    *interactor;
+
+SDALayer *tile_grid_layer;
+SDALayer *pixel_grid_layer;
+
+void
+buffer_set_modified (gboolean modified);
+
+gboolean
+buffer_get_modified (void);
+
+void
+release_context (void);
+
+void
+intr_updated (Interactor *interactor);
+
+void
+update_window_title (void);
+
+GtkWidget *
+window_main_get_source_view (void);
+
+void
+update_window_title (void);
+
+void
+release_context (void);
+
+#endif
diff --git a/saedit/spritedrawingarea/sdalayer.c b/saedit/spritedrawingarea/sdalayer.c
new file mode 100644
index 0000000..9794b80
--- /dev/null
+++ b/saedit/spritedrawingarea/sdalayer.c
@@ -0,0 +1,271 @@
+#include "spritedrawingarea.h"
+#include "sdalayer.h"
+#include "sdalayerprivate.h"
+
+enum {
+	PROP_0,
+	PROP_VISIBLE,
+	PROP_OFFSET_X,
+	PROP_OFFSET_Y,
+	PROP_DRAW_FUNC,
+	PROP_USER_DATA,
+	PROP_Z_INDEX,
+	PROP_COUNT
+};
+
+static void
+sda_layer_get_property (
+	GObject *object,
+	guint prop_id,
+	GValue *value,
+	GParamSpec *pspec
+) {
+	SDALayer *layer = SDA_LAYER (object);
+	SDALayerPrivate *priv = layer->priv;
+
+	switch (prop_id) {
+		case PROP_VISIBLE:
+			g_value_set_boolean (
+				value, priv->visible
+			);
+			break;
+
+		case PROP_OFFSET_X:
+			g_value_set_int (
+				value, priv->offset_x
+			);
+			break;
+
+		case PROP_OFFSET_Y:
+			g_value_set_int (
+				value, priv->offset_y
+			);
+			break;
+
+		case PROP_Z_INDEX:
+			g_value_set_int (
+				value, priv->z_index
+			);
+			break;
+
+		case PROP_DRAW_FUNC:
+			g_value_set_pointer (
+				value, (gpointer) priv->draw_func
+			);
+			break;
+
+		case PROP_USER_DATA:
+			g_value_set_pointer (
+				value, priv->user_data
+			);
+			break;
+
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+static void
+sda_layer_set_property (
+	GObject *object,
+	guint prop_id,
+	const GValue *value,
+	GParamSpec *pspec
+) {
+	SDALayer *layer = SDA_LAYER (object);
+	SDALayerPrivate *priv = layer->priv;
+
+	switch (prop_id) {
+		case PROP_VISIBLE:
+			priv->visible = g_value_get_boolean (value); 
+			break;
+
+		case PROP_OFFSET_X:
+			priv->offset_x = g_value_get_int (value);
+			break;
+
+		case PROP_OFFSET_Y:
+			priv->offset_y = g_value_get_int (value);
+			break;
+
+		case PROP_Z_INDEX:
+			priv->z_index = g_value_get_int (value);
+			break;
+
+		case PROP_DRAW_FUNC:
+			priv->draw_func = (SDALayerDrawFunc) g_value_get_pointer (value);
+			break;
+
+		case PROP_USER_DATA:
+			priv->user_data = g_value_get_pointer (value);
+			break;
+
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+void
+sda_layer_init (
+	SDALayer *layer,
+	SDALayerClass *class
+) {
+	layer->priv = G_TYPE_INSTANCE_GET_PRIVATE (
+		layer,
+		SDA_TYPE_LAYER,
+		SDALayerPrivate
+	);
+	
+	layer->priv->draw_func = NULL;
+	layer->priv->user_data = NULL;
+}
+
+void
+sda_layer_class_init (
+	SDALayerClass *klass,
+	gpointer class_data
+) {
+	GObjectClass *object_class;
+
+	g_type_class_add_private (klass, sizeof (SDALayerPrivate));
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->set_property = sda_layer_set_property;
+	object_class->get_property = sda_layer_get_property;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_VISIBLE,
+		g_param_spec_boolean (
+			"visible",
+			"Visible",
+			"Whether this layer is visible",
+			TRUE,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_OFFSET_X,
+		g_param_spec_int (
+			"offset-x",
+			"Offset X",
+			"The X coordinate of the layer offset",
+			-SPRITE_DRAWING_AREA_FIELD_SIZE,
+			 SPRITE_DRAWING_AREA_FIELD_SIZE,
+			0,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_OFFSET_Y,
+		g_param_spec_int (
+			"offset-y",
+			"Offset y",
+			"The Y coordinate of the layer offset",
+			-SPRITE_DRAWING_AREA_FIELD_SIZE,
+			 SPRITE_DRAWING_AREA_FIELD_SIZE,
+			0,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_DRAW_FUNC,
+		g_param_spec_pointer (
+			"draw-func",
+			"Draw function",
+			"A function invoked to draw the layer",
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_USER_DATA,
+		g_param_spec_pointer (
+			"user-data",
+			"User data",
+			"Data that will be propagated to the draw"
+			" function upon call",
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_Z_INDEX,
+		g_param_spec_int (
+			"z-index",
+			"Z-index",
+			"Z-index of the layer",
+			-1024, 1024, 0,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+}
+
+GType
+sda_layer_get_type (void) {
+	static GType sda_layer_type = 0;
+
+	if (sda_layer_type == 0) {
+		const GTypeInfo sda_layer_info = {
+			sizeof (SDALayerClass),
+			NULL, 	/* base_init */
+			NULL, 	/* base_finalize */
+			(GClassInitFunc) sda_layer_class_init,
+			NULL, 	/* class_finalize */
+			NULL,	/* class_data */
+			sizeof (SDALayer),
+			0,	/* n_preallocs */
+			(GInstanceInitFunc) sda_layer_init,
+			NULL,	/* value_table */
+		};
+
+		sda_layer_type = g_type_register_static (
+			G_TYPE_OBJECT,
+			"SDALayer",
+			&sda_layer_info,
+			0
+		);
+	}
+
+	return sda_layer_type;
+}
+
+SDALayer *sda_layer_new (
+	SDALayerDrawFunc draw_func,
+	gpointer user_data
+) {
+	return g_object_new (
+		SDA_TYPE_LAYER,
+		"draw-func", draw_func,
+		"user-data", user_data,
+		NULL
+	);
+}
+
+gint
+sda_layer_compare_by_z_index (
+	const SDALayer *a,
+	const SDALayer *b
+) {
+	return a->priv->z_index - b->priv->z_index;
+}
+
+void
+sda_layer_set_z_index (SDALayer *layer, gint z_index) {
+	g_object_set (layer, "z-index", z_index, NULL);
+}
+
+void
+sda_layer_set_visible (SDALayer *layer, gboolean visible) {
+	g_object_set (layer, "visible", visible, NULL);
+}
diff --git a/saedit/spritedrawingarea/sdalayer.h b/saedit/spritedrawingarea/sdalayer.h
new file mode 100644
index 0000000..e1bac04
--- /dev/null
+++ b/saedit/spritedrawingarea/sdalayer.h
@@ -0,0 +1,54 @@
+#ifndef _SDALAYER_H_
+#define _SDALAYER_H_
+
+#include <glib-object.h>
+#include <cairo.h>
+
+G_BEGIN_DECLS
+
+#define SDA_TYPE_LAYER (sda_layer_get_type ())
+#define SDA_LAYER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SDA_TYPE_LAYER, SDALayer))
+#define SDA_LAYER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), SDA_TYPE_LAYER, SDALayerClass))
+#define IS_SDA_LAYER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SDA_TYPE_LAYER))
+#define IS_SDA_LAYER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), SDA_TYPE_LAYER))
+#define SDA_LAYER_GET_CLASS(obj) ((obj), SDA_TYPE_LAYER, SDALayerClass)
+
+typedef struct _SDALayer SDALayer;
+typedef struct _SDALayerClass SDALayerClass;
+typedef struct _SDALayerPrivate SDALayerPrivate;
+
+struct _SDALayerClass {
+	GObjectClass parent_class;
+};
+
+GType
+sda_layer_get_type (void);
+
+typedef void
+(* SDALayerDrawFunc) (
+	SDALayer *layer,
+	cairo_t *cr,
+	gpointer user_data
+);
+
+SDALayer *
+sda_layer_new (
+	SDALayerDrawFunc draw_func,
+	gpointer user_data
+);
+
+gint
+sda_layer_compare_by_z_index (
+	const SDALayer *a,
+	const SDALayer *b
+);
+
+void
+sda_layer_set_z_index (SDALayer *layer, gint z_index);
+
+void
+sda_layer_set_visible (SDALayer *layer, gboolean visible);
+
+G_END_DECLS
+
+#endif
diff --git a/saedit/spritedrawingarea/sdalayerprivate.h b/saedit/spritedrawingarea/sdalayerprivate.h
new file mode 100644
index 0000000..daf47bc
--- /dev/null
+++ b/saedit/spritedrawingarea/sdalayerprivate.h
@@ -0,0 +1,19 @@
+#ifndef _SDALAYERPRIVATE_H_
+#define _SDALAYERPRIVATE_H_
+
+struct _SDALayerPrivate {
+	gboolean visible;
+	gint offset_x, offset_y;
+	gint z_index;
+
+	SDALayerDrawFunc draw_func;
+	gpointer user_data;
+};
+
+struct _SDALayer {
+	GObject object;
+
+	SDALayerPrivate *priv;
+};
+
+#endif
diff --git a/saedit/spritedrawingarea/spritedrawingarea.c b/saedit/spritedrawingarea/spritedrawingarea.c
new file mode 100644
index 0000000..376c8e1
--- /dev/null
+++ b/saedit/spritedrawingarea/spritedrawingarea.c
@@ -0,0 +1,437 @@
+#include "spritedrawingarea.h"
+#include "sdalayer.h"
+#include "sdalayerprivate.h"
+
+struct _SpriteDrawingAreaPrivate {
+	gint center_x, center_y;
+	gdouble scale_factor;
+
+	gboolean drag_active;
+	gdouble drag_x, drag_y;
+
+	GList *layers;
+};
+
+enum {
+	PROP_0,
+	PROP_CENTER_X,
+	PROP_CENTER_Y,
+	PROP_SCALE_FACTOR,
+	PROP_COUNT
+};
+
+void
+sprite_drawing_area_get_center (
+	SpriteDrawingArea *sdarea,
+	gint *center_x,
+	gint *center_y
+) {
+	g_object_get (
+		sdarea,
+		"center-x", center_x,
+		"center-y", center_y,
+		NULL
+	);
+}
+
+void
+sprite_drawing_area_set_center (
+	SpriteDrawingArea *sdarea,
+	gint center_x,
+	gint center_y
+) {
+	g_object_set (
+		sdarea,
+		"center-x", center_x,
+		"center-y", center_y,
+		NULL
+	);
+}
+
+gdouble
+sprite_drawing_area_get_scale_factor (
+	SpriteDrawingArea *sdarea
+) {
+	gdouble result;
+
+	g_object_get (
+		sdarea,
+		"scale-factor", &result,
+		NULL
+	);
+
+	return result;
+}
+
+void
+sprite_drawing_area_set_scale_factor (
+	SpriteDrawingArea *sdarea,
+	gdouble scale_factor
+) {
+	g_object_set (
+		sdarea,
+		"scale-factor", scale_factor,
+		NULL
+	);
+}
+
+static gboolean
+_sprite_drawing_area_draw_handler (
+	GtkWidget *widget,
+	cairo_t *cr,
+	gpointer user_data
+) {
+	SpriteDrawingArea *sdarea = SPRITE_DRAWING_AREA (widget);
+	GList *l;
+
+	gint width  = gtk_widget_get_allocated_width (widget);
+	gint height = gtk_widget_get_allocated_height (widget);
+
+	gdouble scale = sprite_drawing_area_get_scale_factor (sdarea);
+
+	gint center_x, center_y;
+
+	sprite_drawing_area_get_center (sdarea, &center_x, &center_y);
+
+	cairo_translate (
+		cr,
+		0.5 * (gdouble) width,
+		0.5 * (gdouble) height
+	);
+
+	cairo_scale (cr, scale, scale);
+
+	cairo_translate (
+		cr,
+		-center_x,
+		-center_y
+	);
+
+	sdarea->priv->layers = g_list_sort (
+		sdarea->priv->layers,
+		(GCompareFunc) sda_layer_compare_by_z_index
+	);
+
+	for (l = sdarea->priv->layers; l != NULL; l = l->next) {
+		SDALayer *layer = SDA_LAYER (l->data);
+
+		if (!layer->priv->visible)
+			continue;
+
+		cairo_save (cr);
+
+		cairo_translate (
+			cr,
+			layer->priv->offset_x,
+			layer->priv->offset_y
+		);
+
+		if (layer->priv->draw_func != NULL)
+			layer->priv->draw_func (layer, cr, layer->priv->user_data);
+
+		cairo_restore (cr);
+	}
+
+	return FALSE;
+}
+
+static void
+sprite_drawing_area_get_property (
+	GObject *object,
+	guint prop_id,
+	GValue *value,
+	GParamSpec *pspec
+) {
+	SpriteDrawingArea *sdarea = SPRITE_DRAWING_AREA (object);
+
+	switch (prop_id) {
+		case PROP_CENTER_X:
+			g_value_set_int (
+				value, sdarea->priv->center_x
+			);
+			break;
+
+		case PROP_CENTER_Y:
+			g_value_set_int (
+				value, sdarea->priv->center_y
+			);
+			break;
+
+		case PROP_SCALE_FACTOR:
+			g_value_set_double (
+				value, sdarea->priv->scale_factor
+			);
+			break;
+
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+static void
+sprite_drawing_area_set_property (
+	GObject *object,
+	guint prop_id,
+	const GValue *value,
+	GParamSpec *pspec
+) {
+	SpriteDrawingArea *sdarea = SPRITE_DRAWING_AREA (object);
+
+	switch (prop_id) {
+		case PROP_CENTER_X:
+			sdarea->priv->center_x = g_value_get_int (value); 
+			break;
+
+		case PROP_CENTER_Y:
+			sdarea->priv->center_y = g_value_get_int (value);
+			break;
+
+		case PROP_SCALE_FACTOR:
+			sdarea->priv->scale_factor = g_value_get_double (value);
+			break;
+
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+gboolean
+_sprite_drawing_area_drag_start_callback (
+	GtkWidget *widget,
+	GdkEvent *event,
+	gpointer user_data
+) {
+	SpriteDrawingArea *sdarea = SPRITE_DRAWING_AREA (widget);
+
+	if (event->button.button != 1)
+		return FALSE;
+
+	sdarea->priv->drag_active = TRUE;
+	sdarea->priv->drag_x = event->button.x;
+	sdarea->priv->drag_y = event->button.y;
+
+	return FALSE;
+}
+
+gboolean
+_sprite_drawing_area_drag_end_callback (
+		GtkWidget *widget,
+		GdkEvent *event,
+		gpointer user_data
+) {
+	SpriteDrawingArea *sdarea = SPRITE_DRAWING_AREA (widget);
+
+	if (event->button.button != 1)
+		return FALSE;
+
+	sdarea->priv->drag_active = FALSE;
+	return FALSE;
+}
+
+gboolean
+_sprite_drawing_area_drag_motion_callback (
+		GtkWidget *widget,
+		GdkEvent *event,
+		gpointer user_data
+) {
+	SpriteDrawingArea *sdarea = SPRITE_DRAWING_AREA (widget);
+
+	gdouble event_x, event_y;
+
+	gint center_x, center_y;
+	gint delta_x, delta_y;
+
+	gdouble scale_factor;
+
+	if ((event->motion.state & GDK_BUTTON1_MASK) == 0)
+		return FALSE;
+
+	if (!sdarea->priv->drag_active)
+		return FALSE;
+
+	event_x = event->motion.x;
+	event_y = event->motion.y;
+
+	sprite_drawing_area_get_center (sdarea, &center_x, &center_y);
+
+	scale_factor = sprite_drawing_area_get_scale_factor (sdarea);
+
+	delta_x = 
+		(gint) (event_x / scale_factor + 0.5) - (gint) (sdarea->priv->drag_x / scale_factor + 0.5);
+	delta_y =
+		(gint) (event_y / scale_factor + 0.5) - (gint) (sdarea->priv->drag_y / scale_factor + 0.5);
+
+	sprite_drawing_area_set_center (
+		sdarea,
+		center_x - delta_x,
+		center_y - delta_y
+	);
+
+	sdarea->priv->drag_x = event_x;
+	sdarea->priv->drag_y = event_y;
+
+	gtk_widget_queue_draw (widget);
+	return FALSE;
+}
+
+static void
+sprite_drawing_area_init (
+	SpriteDrawingArea *sdarea,
+	SpriteDrawingAreaClass *klass
+) {
+	/* Setting up private */
+	sdarea->priv = G_TYPE_INSTANCE_GET_PRIVATE (
+		sdarea,
+		TYPE_SPRITE_DRAWING_AREA,
+		SpriteDrawingAreaPrivate
+	);
+
+	sdarea->priv->layers = NULL;
+
+	g_signal_connect (
+		sdarea,
+		"button-press-event",
+		(GCallback) _sprite_drawing_area_drag_start_callback,
+		NULL
+	);
+
+	g_signal_connect (
+		sdarea,
+		"button-release-event",
+		(GCallback) _sprite_drawing_area_drag_end_callback,
+		NULL
+	);
+
+	g_signal_connect (
+		sdarea,
+		"motion-notify-event",
+		(GCallback) _sprite_drawing_area_drag_motion_callback,
+		NULL
+	);
+}
+
+static void
+sprite_drawing_area_class_init (
+	SpriteDrawingAreaClass *klass,
+	gpointer class_data
+) {
+	GObjectClass *object_class;
+
+	g_type_class_add_private (klass, sizeof (SpriteDrawingAreaPrivate));
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->set_property = sprite_drawing_area_set_property;
+	object_class->get_property = sprite_drawing_area_get_property;
+
+	g_signal_override_class_handler (
+		"draw",
+		TYPE_SPRITE_DRAWING_AREA,
+		(GCallback) _sprite_drawing_area_draw_handler
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_CENTER_X,
+		g_param_spec_int (
+			"center-x",
+			"Center X",
+			"The X coordinate of the point on the field "
+			"camera is centered on, in pixels",
+			-SPRITE_DRAWING_AREA_FIELD_SIZE,
+			 SPRITE_DRAWING_AREA_FIELD_SIZE,
+			0,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_CENTER_Y,
+		g_param_spec_int (
+			"center-y",
+			"Center Y",
+			"The Y coordinate of the point on the field "
+			"camera is centered on, in pixels",
+			-SPRITE_DRAWING_AREA_FIELD_SIZE,
+			 SPRITE_DRAWING_AREA_FIELD_SIZE,
+			0,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_SCALE_FACTOR,
+		g_param_spec_double (
+			"scale-factor",
+			"Scale factor",
+			"The scaling factor that is used in making "
+			"the camera zooming effect",
+			0.01, 100.0, 1.0,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+}
+
+GType
+sprite_drawing_area_get_type (void) {
+	static GType sdarea_type = 0;
+
+	if (sdarea_type == 0) {
+		const GTypeInfo sdarea_info = {
+			sizeof (SpriteDrawingAreaClass),
+			NULL, 	/* base_init */
+			NULL, 	/* base_finalize */
+			(GClassInitFunc) sprite_drawing_area_class_init,
+			NULL, 	/* class_finalize */
+			NULL,	/* class_data */
+			sizeof (SpriteDrawingArea),
+			0,	/* n_preallocs */
+			(GInstanceInitFunc) sprite_drawing_area_init,
+			NULL,	/* value_table */
+		};
+
+		sdarea_type = g_type_register_static (
+			GTK_TYPE_DRAWING_AREA,
+			"SpriteDrawingArea",
+			&sdarea_info,
+			0
+		);
+
+	}
+
+	return sdarea_type;
+}
+
+GtkWidget *
+sprite_drawing_area_new (void) {
+	GtkWidget *sdarea = GTK_WIDGET (
+		g_object_new (TYPE_SPRITE_DRAWING_AREA, NULL)
+	);
+	return sdarea;
+}
+
+void
+sprite_drawing_area_add_layer (
+	SpriteDrawingArea *sdarea,
+	SDALayer *layer
+) {
+	sdarea->priv->layers = g_list_insert_sorted (
+		sdarea->priv->layers,
+		layer,
+		(GCompareFunc) sda_layer_compare_by_z_index
+	);
+}
+
+void
+sprite_drawing_area_remove_layer (
+	SpriteDrawingArea *sdarea,
+	SDALayer *layer
+) {
+	sdarea->priv->layers = g_list_remove (
+		sdarea->priv->layers,
+		layer
+	);
+}
diff --git a/saedit/spritedrawingarea/spritedrawingarea.h b/saedit/spritedrawingarea/spritedrawingarea.h
new file mode 100644
index 0000000..ee3aa6d
--- /dev/null
+++ b/saedit/spritedrawingarea/spritedrawingarea.h
@@ -0,0 +1,71 @@
+#ifndef __SPRITE_DRAWING_AREA_H__
+#define __SPRITE_DRAWING_AREA_H__
+
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+#include "sdalayer.h"
+
+G_BEGIN_DECLS
+
+#define TYPE_SPRITE_DRAWING_AREA (sprite_drawing_area_get_type ())
+#define SPRITE_DRAWING_AREA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_SPRITE_DRAWING_AREA, SpriteDrawingArea))
+#define SPRITE_DRAWING_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_SPRITE_DRAWING_AREA, SpriteDrawingAreaClass))
+#define IS_SPRITE_DRAWING_AREA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_SPRITE_DRAWING_AREA))
+#define IS_SPRITE_DRAWING_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_SPRITE_DRAWING_AREA))
+#define SPRITE_DRAWING_AREA_GET_CLASS(obj) ((obj), TYPE_SPRITE_DRAWING_AREA, SpriteDrawingAreaClass)
+
+typedef struct _SpriteDrawingArea SpriteDrawingArea;
+typedef struct _SpriteDrawingAreaPrivate SpriteDrawingAreaPrivate;
+typedef struct _SpriteDrawingAreaClass SpriteDrawingAreaClass;
+
+struct _SpriteDrawingArea {
+	GtkDrawingArea darea;
+
+	SpriteDrawingAreaPrivate *priv;
+};
+
+struct _SpriteDrawingAreaClass {
+	GtkDrawingAreaClass darea_class;
+
+	void (* draw_field) (
+		GtkWidget *sdarea,
+		gpointer data
+	);
+};
+
+static const gint SPRITE_DRAWING_AREA_FIELD_SIZE = 1024;
+
+GType
+sprite_drawing_area_get_type (void);
+
+GtkWidget*
+sprite_drawing_area_new (void);
+
+void
+sprite_drawing_area_set_scale_factor (
+	SpriteDrawingArea *sdarea,
+	gdouble scale_factor
+);
+
+void
+sprite_drawing_area_add_layer (
+	SpriteDrawingArea *sdarea,
+	SDALayer *layer
+);
+
+void
+sprite_drawing_area_remove_layer (
+	SpriteDrawingArea *sdarea,
+	SDALayer *layer
+);
+
+void
+sprite_drawing_area_set_center (
+	SpriteDrawingArea *sdarea,
+	gint center_x,
+	gint center_y
+);
+
+G_END_DECLS
+
+#endif
diff --git a/saedit/treefolderview/treefolderview.c b/saedit/treefolderview/treefolderview.c
new file mode 100644
index 0000000..e1b02f0
--- /dev/null
+++ b/saedit/treefolderview/treefolderview.c
@@ -0,0 +1,400 @@
+#include "treefolderview.h"
+#include "treefolderviewprivate.h"
+
+enum {
+	STORE_COLUMN_FILE_NAME,
+	STORE_COLUMN_IS_FOLDER,
+	STORE_COLUMN_FILE_ICON,
+	STORE_COLUMN_FILE_INFO,
+	STORE_COLUMN_WAS_EXPANDED,
+	STORE_COLUMN_COUNT
+};
+
+enum {
+	SIGNAL_FILE_ACTIVATED,
+	SIGNAL_COUNT
+};
+
+struct _TreeFolderViewPrivate {
+	gchar *filename;
+	GtkFileFilter *file_filter;
+};
+
+static guint tfview_signals [SIGNAL_COUNT] = { 0 };
+
+static GtkTreeStore *
+tree_folder_view_get_store (TreeFolderView *tfview) {
+	GtkTreeModelFilter *model;
+	
+	model = GTK_TREE_MODEL_FILTER (gtk_tree_view_get_model (GTK_TREE_VIEW (tfview)));
+	return GTK_TREE_STORE (gtk_tree_model_filter_get_model (model));
+}
+
+static gboolean
+file_filter_filter_file_info (GtkFileFilter *filter, GFileInfo *info) {
+	gboolean result;
+	gchar *mimetype = NULL;
+	GtkFileFilterFlags required;
+	GtkFileFilterInfo filter_info = { 0, };
+
+	if (filter == NULL)
+		return TRUE;
+
+	required = gtk_file_filter_get_needed (filter);
+
+	filter_info.contains |= GTK_FILE_FILTER_DISPLAY_NAME;
+	filter_info.display_name = g_file_info_get_display_name (info);
+
+	if (required & GTK_FILE_FILTER_MIME_TYPE) {
+		const gchar *ctype = g_file_info_get_content_type (info);
+		if (ctype != NULL) {
+			mimetype = g_content_type_get_mime_type (ctype);
+			if (mimetype != NULL) {
+				filter_info.contains |= GTK_FILE_FILTER_MIME_TYPE;
+				filter_info.mime_type = mimetype;
+			}
+		}
+	}
+
+	if (required & GTK_FILE_FILTER_FILENAME) {
+		filter_info.filename = g_file_info_get_name (info);
+		filter_info.contains |= GTK_FILE_FILTER_FILENAME;
+	}
+
+	result = gtk_file_filter_filter (filter, &filter_info);
+
+	g_free(mimetype);
+
+	return result;
+}
+
+static gchar *
+tree_folder_view_get_file_path_from_tree_path (
+	TreeFolderView *tfview,
+	GtkTreePath *path
+) {
+	GtkTreeIter iter;
+	GtkTreeModel *model;
+
+	model = GTK_TREE_MODEL (tree_folder_view_get_store (tfview));
+	gtk_tree_model_get_iter (model, &iter, path);
+
+	return tree_folder_view_get_file_path_from_iter (tfview, &iter);
+}
+
+static gchar *
+tree_folder_view_get_file_path_from_iter (
+	TreeFolderView *tfview,
+	GtkTreeIter *file_iter
+) {
+	gchar *result, *data;
+	GPtrArray *names;
+	GtkTreeIter iter;
+	GtkTreeModel *model;
+	GtkTreePath *_path;
+
+	model = GTK_TREE_MODEL (tree_folder_view_get_store (tfview));
+	_path = gtk_tree_model_get_path (model, file_iter);
+
+	names = g_ptr_array_new_with_free_func ((GDestroyNotify) g_free);
+
+	while (gtk_tree_path_get_depth (_path) > 0)  {
+		gtk_tree_model_get_iter (model, &iter, _path);
+		gtk_tree_model_get (
+			model, &iter, 
+			STORE_COLUMN_FILE_NAME, &data, -1
+		);
+		g_ptr_array_insert (names, 0, data);
+		gtk_tree_path_up (_path);
+	}
+
+	g_ptr_array_insert (names, 0, g_strdup (tfview->priv->filename));
+	g_ptr_array_add (names, NULL);
+	result = g_strjoinv ("/", (gchar **) names->pdata);
+
+	g_ptr_array_free (names, TRUE);
+	gtk_tree_path_free (_path);
+
+	return result;
+}
+
+static void
+tree_folder_view_row_expanded (
+	GtkTreeView *tree_view,
+	GtkTreeIter *filter_iter,
+	GtkTreePath *path
+) {
+	gboolean w_exp;
+	gchar *file_path;
+	GtkTreeIter iter, citer;
+	GtkTreeStore *store;
+
+	gtk_tree_model_filter_convert_iter_to_child_iter (
+		GTK_TREE_MODEL_FILTER (gtk_tree_view_get_model (tree_view)),
+		&iter,
+		filter_iter
+	);
+
+	store = tree_folder_view_get_store (
+		TREE_FOLDER_VIEW (tree_view)
+	);
+	
+	gtk_tree_model_get (
+		GTK_TREE_MODEL (store), &iter,
+		STORE_COLUMN_WAS_EXPANDED, &w_exp,
+		-1
+	);
+
+	if (w_exp)
+		return;
+
+	gtk_tree_store_set (
+		store, &iter,
+		STORE_COLUMN_WAS_EXPANDED, TRUE,
+		-1
+	);
+
+	if (!gtk_tree_model_iter_has_child (GTK_TREE_MODEL (store), &iter))
+		return;
+
+	gtk_tree_model_iter_children (GTK_TREE_MODEL (store), &citer, &iter);
+	do {
+		file_path = tree_folder_view_get_file_path_from_iter (
+			TREE_FOLDER_VIEW (tree_view),
+			&citer
+		);
+
+		tree_store_append_file_children (
+			store,
+			&citer,
+			file_path,
+			FALSE
+		);
+
+		g_free (file_path);
+	} while (gtk_tree_model_iter_next (GTK_TREE_MODEL (store), &citer));
+}
+
+static gboolean
+tree_model_filter_file_visible_func (
+	GtkTreeModel *model,
+	GtkTreeIter *iter,
+	gpointer data
+) {
+	gboolean is_folder;
+	GFileInfo *info;
+	GtkFileFilter *filter;
+	TreeFolderView *tfview;
+
+	tfview = TREE_FOLDER_VIEW (data);
+
+	gtk_tree_model_get (
+		model, iter,
+		STORE_COLUMN_FILE_INFO, &info,
+		STORE_COLUMN_IS_FOLDER, &is_folder,
+		-1
+	);
+
+	if (info == NULL)
+		return FALSE;
+
+	if (g_file_info_get_is_hidden (info))
+		return FALSE;
+
+	if (is_folder)
+		return TRUE;
+
+	filter = tree_folder_view_get_filter (tfview);
+	return file_filter_filter_file_info (filter, info);
+}
+
+static void
+tree_store_append_file_children (
+	GtkTreeStore *store,
+	GtkTreeIter *iter,
+	const gchar *path,
+	gboolean expanded
+) {
+	gchar *npath;
+	const gchar *name;
+	GDir *dir;
+
+	dir = g_dir_open (path, 0, NULL);
+
+	if (dir == NULL)
+		return;
+
+	while ((name = g_dir_read_name (dir)) != NULL) {
+		npath = g_strconcat (path, "/", name, NULL);
+		
+		tree_store_append_file_recursive (
+			store,
+			iter,
+			npath,
+			name,
+			expanded
+		);
+			
+		g_free(npath);
+	}
+
+	g_dir_close (dir);
+}
+
+static gint
+tree_store_append_file_recursive (
+	GtkTreeStore *store,
+	GtkTreeIter *parent_iter,
+	const gchar *path,
+	const gchar *display_name,
+	gboolean append_children
+) {
+	GFile *file;
+	GFileInfo *info;
+	GtkTreeIter iter;
+
+	file = g_file_new_for_path (path);
+	info = g_file_query_info (file, "*", 0, NULL, NULL);
+	g_object_unref (file);
+
+	gtk_tree_store_append (store, &iter, parent_iter);
+	gtk_tree_store_set (
+		store, &iter,
+		STORE_COLUMN_FILE_NAME, display_name,
+		STORE_COLUMN_FILE_ICON, g_content_type_get_icon (g_file_info_get_content_type (info)),
+		STORE_COLUMN_FILE_INFO, info,
+		STORE_COLUMN_IS_FOLDER, FALSE, 
+		STORE_COLUMN_WAS_EXPANDED, FALSE,
+		-1
+	);
+
+	if (g_file_info_get_file_type (info) != G_FILE_TYPE_DIRECTORY)
+		return 0;
+
+	gtk_tree_store_set (
+		store, &iter, 
+		STORE_COLUMN_IS_FOLDER, TRUE,
+		STORE_COLUMN_FILE_ICON, g_themed_icon_new ("folder"), -1
+	);
+
+	if (!append_children)
+		return 1;
+
+	tree_store_append_file_children (store, &iter, path, FALSE);
+	
+	return 1;
+}
+
+static gint
+tree_store_iter_compare_func (
+	GtkTreeModel *model,
+	GtkTreeIter *a,
+	GtkTreeIter *b,
+	gpointer user_data
+) {
+	gboolean isf_a, isf_b;
+	gint cmp;
+	gchar *val_a, *val_b;
+
+	gtk_tree_model_get (model, a, STORE_COLUMN_IS_FOLDER, &isf_a, -1);
+	gtk_tree_model_get (model, b, STORE_COLUMN_IS_FOLDER, &isf_b, -1);
+
+	if (isf_a != isf_b)
+		return isf_b;
+	
+	gtk_tree_model_get (model, a, STORE_COLUMN_FILE_NAME, &val_a, -1);
+	gtk_tree_model_get (model, b, STORE_COLUMN_FILE_NAME, &val_b, -1);
+
+	cmp = g_strcmp0 (val_a, val_b);
+	g_free (val_a);
+	g_free (val_b);
+
+	return cmp;
+}
+
+static void
+tree_folder_view_row_activated (
+	GtkTreeView *tree_view, 
+	GtkTreePath *filter_path, 
+	GtkTreeViewColumn *col
+) {
+	gboolean is_folder;
+	GtkTreeIter iter;
+	GtkTreePath *path;
+	GtkTreeStore *store;
+
+	path = gtk_tree_model_filter_convert_path_to_child_path (
+		GTK_TREE_MODEL_FILTER (gtk_tree_view_get_model (tree_view)),
+		filter_path
+	);
+	
+	store = tree_folder_view_get_store (TREE_FOLDER_VIEW (tree_view));
+
+	gtk_tree_model_get_iter (GTK_TREE_MODEL (store), &iter, path);
+	gtk_tree_model_get (
+		GTK_TREE_MODEL (store), &iter,
+		STORE_COLUMN_IS_FOLDER, &is_folder, -1
+	);
+
+	if (is_folder)
+		return;
+
+	g_signal_emit (
+		tree_view, 
+		tfview_signals[SIGNAL_FILE_ACTIVATED], 
+		0,
+		tree_folder_view_get_file_path_from_tree_path (
+			TREE_FOLDER_VIEW (tree_view),
+			path
+		)
+	);
+
+	gtk_tree_path_free (path);
+}
+
+void
+tree_folder_view_set_filename (
+	TreeFolderView *tfview, 
+	const gchar *filename
+) {
+	GtkTreeStore *store = tree_folder_view_get_store (tfview);
+
+	/* TODO: values inside are not freed */
+	gtk_tree_store_clear (store);
+
+	g_free (tfview->priv->filename);
+	tfview->priv->filename = g_strdup (filename);
+
+	if (filename != NULL) {
+		tree_store_append_file_children (
+			store,
+			NULL,
+			filename,
+			TRUE
+		);
+	}
+}
+
+GtkFileFilter *
+tree_folder_view_get_filter (TreeFolderView *tfview) {
+	return tfview->priv->file_filter;
+}
+
+void
+tree_folder_view_set_filter (TreeFolderView *tfview, GtkFileFilter *filter) {
+	if (G_IS_OBJECT (tfview->priv->file_filter))
+		g_object_unref (tfview->priv->file_filter);
+	
+	tfview->priv->file_filter = filter;
+	g_object_ref (filter);
+	
+	gtk_tree_model_filter_refilter (
+		GTK_TREE_MODEL_FILTER (gtk_tree_view_get_model (GTK_TREE_VIEW (tfview))));
+}
+
+gchar *
+tree_folder_view_get_filename (TreeFolderView *tfview) {
+	return g_strdup (tfview->priv->filename);
+}
+
+#include "type.c"
diff --git a/saedit/treefolderview/treefolderview.h b/saedit/treefolderview/treefolderview.h
new file mode 100644
index 0000000..78aeefc
--- /dev/null
+++ b/saedit/treefolderview/treefolderview.h
@@ -0,0 +1,64 @@
+#ifndef __TREE_FOLDER_VIEW_H__
+#define __TREE_FOLDER_VIEW_H__
+
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define TYPE_TREE_FOLDER_VIEW (tree_folder_view_get_type ())
+#define TREE_FOLDER_VIEW(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_TREE_FOLDER_VIEW, TreeFolderView))
+#define TREE_FOLDER_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_TREE_FOLDER_VIEW, TreeFolderViewClass))
+#define IS_TREE_FOLDER_VIEW(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_TREE_FOLDER_VIEW))
+#define IS_TREE_FOLDER_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_TREE_FOLDER_VIEW))
+#define TREE_FOLDER_VIEW_GET_CLASS(obj) ((obj), TYPE_TREE_FOLDER_VIEW, TreeFolderViewClass)
+
+typedef struct _TreeFolderView TreeFolderView;
+typedef struct _TreeFolderViewPrivate TreeFolderViewPrivate;
+typedef struct _TreeFolderViewClass TreeFolderViewClass;
+
+struct _TreeFolderView {
+	GtkTreeView tview;
+
+	TreeFolderViewPrivate *priv;
+};
+
+struct _TreeFolderViewClass {
+	GtkTreeViewClass tview_class;
+
+	void (* file_activated) (
+		TreeFolderView *tfview,
+		gchar *filename
+	);
+};
+
+GType
+tree_folder_view_get_type (void);
+
+GtkWidget*
+tree_folder_view_new (void);
+
+void
+tree_folder_view_set_filename  (
+	TreeFolderView *tfview,
+	const gchar    *filename
+);
+
+GtkFileFilter*
+tree_folder_view_get_filter  (TreeFolderView *tfview);
+
+void
+tree_folder_view_set_filter  (
+	TreeFolderView *tfview,
+	GtkFileFilter *filter
+);
+
+gchar *
+tree_folder_view_get_filename (TreeFolderView *tfview);
+
+gchar *
+tree_folder_view_get_display_name (TreeFolderView *tfview);
+
+G_END_DECLS
+
+#endif
diff --git a/saedit/treefolderview/treefolderviewprivate.h b/saedit/treefolderview/treefolderviewprivate.h
new file mode 100644
index 0000000..01119fc
--- /dev/null
+++ b/saedit/treefolderview/treefolderviewprivate.h
@@ -0,0 +1,45 @@
+#ifndef __TREE_FOLDER_VIEW_PRIVATE_H__
+#define __TREE_FOLDER_VIEW_PRIVATE_H__
+
+enum {
+	PROP_0,
+	PROP_FILTER,
+	PROP_FILENAME,
+	PROP_MODEL,
+	PROP_COUNT
+};
+
+static GtkTreeStore *
+tree_folder_view_get_store (TreeFolderView *tfview);
+
+static gchar *
+tree_folder_view_get_file_path_from_tree_path (
+	TreeFolderView *tfview,
+	GtkTreePath *path
+);
+
+static gchar *
+tree_folder_view_get_file_path_from_iter (
+	TreeFolderView *tfview,
+	GtkTreeIter *file_iter
+);
+
+static void
+tree_store_append_file_children (
+	GtkTreeStore *store,
+	GtkTreeIter *iter,
+	const gchar *path,
+	gboolean expanded
+);
+
+static gint
+tree_store_append_file_recursive (
+	GtkTreeStore *store,
+	GtkTreeIter *parent_iter,
+	const gchar *path,
+	const gchar *display_name,
+	gboolean append_children
+);
+
+#endif
+
diff --git a/saedit/treefolderview/type.c b/saedit/treefolderview/type.c
new file mode 100644
index 0000000..fbb0f21
--- /dev/null
+++ b/saedit/treefolderview/type.c
@@ -0,0 +1,250 @@
+static void
+tree_folder_view_init (
+	TreeFolderView *tfview,
+	TreeFolderViewClass *klass
+) {
+	GType *types;
+	GtkCellRenderer *renderer;
+	GtkTreeModel *model;
+	GtkTreeStore *store;
+	GtkTreeView *tview;
+	GtkTreeViewColumn *col;
+
+	tview = GTK_TREE_VIEW (tfview);
+
+	/* Setting up TreeView properties */
+	gtk_tree_view_set_headers_visible (tview, FALSE);
+	gtk_tree_view_set_enable_tree_lines (tview, TRUE);
+	
+	/* Setting up only column */
+	col = gtk_tree_view_column_new ();
+
+	/* Filename renderer */
+	renderer = gtk_cell_renderer_text_new ();
+	gtk_tree_view_column_pack_end (col, renderer, TRUE);
+	gtk_tree_view_column_set_attributes (
+		col,
+		renderer,
+		"text", STORE_COLUMN_FILE_NAME,
+		NULL
+	);
+
+	/* Filetype renderer */
+	renderer = gtk_cell_renderer_pixbuf_new();
+	gtk_tree_view_column_pack_end (col, renderer, FALSE);
+	gtk_tree_view_column_set_attributes (
+		col,
+		renderer,
+		"gicon", STORE_COLUMN_FILE_ICON,
+		NULL
+	);
+
+	gtk_tree_view_append_column (tview, col);
+	
+	/* Setting up TreeStore */
+	types = g_new (GType, STORE_COLUMN_COUNT);
+	types [STORE_COLUMN_FILE_NAME] = G_TYPE_STRING;
+	types [STORE_COLUMN_FILE_ICON] = G_TYPE_ICON;
+	types [STORE_COLUMN_FILE_INFO] = G_TYPE_FILE_INFO;
+	types [STORE_COLUMN_IS_FOLDER] = G_TYPE_BOOLEAN;
+	types [STORE_COLUMN_WAS_EXPANDED] = G_TYPE_BOOLEAN;
+
+	store = gtk_tree_store_newv (STORE_COLUMN_COUNT, types);
+	g_free(types);
+
+	gtk_tree_sortable_set_sort_func (
+		GTK_TREE_SORTABLE (store),
+		STORE_COLUMN_FILE_NAME,
+		(GtkTreeIterCompareFunc) tree_store_iter_compare_func,
+		NULL,
+		NULL
+	);
+
+	gtk_tree_sortable_set_sort_column_id (
+		GTK_TREE_SORTABLE (store),
+		STORE_COLUMN_FILE_NAME,
+		GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID
+	);
+
+	/* Setting up TreeModelFilter */
+	model = gtk_tree_model_filter_new (GTK_TREE_MODEL (store), NULL);
+	gtk_tree_model_filter_set_visible_func (
+		GTK_TREE_MODEL_FILTER (model),
+		(GtkTreeModelFilterVisibleFunc) tree_model_filter_file_visible_func,
+		(gpointer) tview,
+		NULL
+	);
+	gtk_tree_view_set_model (tview, model);
+	
+	/* Setting up private */
+	tfview->priv = G_TYPE_INSTANCE_GET_PRIVATE (
+		tfview,
+		TYPE_TREE_FOLDER_VIEW,
+		TreeFolderViewPrivate
+	);
+}
+
+static void
+tree_folder_view_set_property (
+	GObject *object,
+	guint prop_id,
+	const GValue *value,
+	GParamSpec *pspec
+) {
+	TreeFolderView *tfview = TREE_FOLDER_VIEW (object);
+
+	switch (prop_id) {
+		case PROP_FILTER:
+			tree_folder_view_set_filter (
+				tfview,
+				GTK_FILE_FILTER (g_value_get_object (value))
+			);
+			break;
+		case PROP_FILENAME:
+			tree_folder_view_set_filename (
+				tfview,
+				g_value_get_string (value)
+			);
+			break;
+		case PROP_MODEL:
+			g_warning(
+				"\"model\" property of GtkTreeView is overriden "
+				"in TreeFolderView and shouldn't be changed"
+			);
+			break;
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+static void
+tree_folder_view_get_property (
+	GObject *object,
+	guint prop_id,
+	GValue *value,
+	GParamSpec *pspec
+) {
+	TreeFolderView *tfview = TREE_FOLDER_VIEW (object);
+
+	switch (prop_id) {
+		case PROP_FILTER:
+			g_value_set_object (
+				value, tree_folder_view_get_filter (tfview)
+			);
+			break;
+		case PROP_FILENAME:
+			g_value_set_string (
+				value, tree_folder_view_get_filename (tfview)
+			);
+			break;
+		case PROP_MODEL:
+			g_value_set_object (
+				value, gtk_tree_view_get_model (GTK_TREE_VIEW (tfview))
+			);
+			break;
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+static void
+tree_folder_view_class_init (
+	TreeFolderViewClass *klass,
+	gpointer class_data
+) {
+	GObjectClass *object_class;
+	GtkTreeViewClass *tree_view_class;
+	
+	object_class = G_OBJECT_CLASS (klass);
+	tree_view_class = GTK_TREE_VIEW_CLASS (klass);
+
+	tree_view_class->row_activated = tree_folder_view_row_activated;
+	tree_view_class->row_expanded = tree_folder_view_row_expanded;
+
+	tfview_signals [SIGNAL_FILE_ACTIVATED] = g_signal_new (
+		"file-activated",
+		TYPE_TREE_FOLDER_VIEW,
+		G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+		G_STRUCT_OFFSET (TreeFolderViewClass, file_activated),
+		NULL, NULL, NULL,
+		G_TYPE_NONE, 1,
+		G_TYPE_STRING
+	);
+
+	g_type_class_add_private (klass, sizeof (TreeFolderViewPrivate));
+
+	object_class->set_property = tree_folder_view_set_property;
+	object_class->get_property = tree_folder_view_get_property;
+ 
+	g_object_class_install_property (
+		object_class,
+		PROP_FILTER,
+		g_param_spec_object (
+			"filter",
+			"File filter",
+			"File filter for selecting "
+			"which files should be displayed.",
+			GTK_TYPE_FILE_FILTER,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_install_property (
+		object_class,
+		PROP_FILENAME,
+		g_param_spec_string (
+			"filename",
+			"Folder filename",
+			"Full path to a folder "
+			"which contents are displayed.",
+			NULL,
+			G_PARAM_READWRITE | G_PARAM_CONSTRUCT
+		)
+	);
+
+	g_object_class_override_property (
+		object_class,
+		PROP_MODEL,
+		"model"
+	);
+}
+
+GType
+tree_folder_view_get_type (void) {
+	static GType tfview_type = 0;
+
+	if (tfview_type == 0) {
+		const GTypeInfo tfview_info = {
+			sizeof (TreeFolderViewClass),
+			NULL, 	/* base_init */
+			NULL, 	/* base_finalize */
+			(GClassInitFunc) tree_folder_view_class_init,
+			NULL, 	/* class_finalize */
+			NULL,	/* class_data */
+			sizeof (TreeFolderView),
+			0,	/* n_preallocs */
+			(GInstanceInitFunc) tree_folder_view_init,
+			NULL,	/* value_table */
+		};
+
+		tfview_type = g_type_register_static (
+			GTK_TYPE_TREE_VIEW,
+			"TreeFolderView",
+			&tfview_info,
+			0
+		);
+
+	}
+
+	return tfview_type;
+}
+
+GtkWidget *
+tree_folder_view_new (void) {
+	GtkWidget *tfview = GTK_WIDGET (
+		g_object_new (TYPE_TREE_FOLDER_VIEW, NULL)
+	);
+	return tfview;
+}
diff --git a/saedit/xml.c b/saedit/xml.c
new file mode 100644
index 0000000..90c4d76
--- /dev/null
+++ b/saedit/xml.c
@@ -0,0 +1,385 @@
+#include "xml.h"
+#include <string.h>
+
+gchar **
+xml_attr_new (
+	const gchar *name,
+	const gchar *value
+) {
+	gchar **attr = g_new0(gchar*, 2);
+	attr[0] = g_strdup(name);
+	attr[1] = g_strdup(value);
+	return attr;
+}
+
+gchar *
+xml_node_get_attr_value (
+	const XMLNode *node,
+	const gchar *attr_name
+) {
+	gchar **attr = node->attributes;
+	guint i;
+	for (i = 0; i < g_strv_length(attr); i += 2)
+		if (g_str_equal(attr[i], attr_name))
+			return g_strdup (attr[i + 1]);
+	return NULL;
+}
+
+gint
+xml_node_get_int_attr_value (
+	const XMLNode *node,
+	const gchar *attr_name,
+	gint retval
+) {
+	gchar *val = xml_node_get_attr_value (node, attr_name);
+
+	if (val != NULL) {
+		try_strtoint (val, &retval);
+		g_free (val);
+	}
+	
+	return retval;
+}
+
+gint
+xml_node_get_int_attr_value_limited (
+	const XMLNode *node,
+	const gchar   *attr_name,
+	gint           retval,
+	gint           lower,
+	gint           upper
+) {
+	g_assert (lower <= upper);
+
+	retval = xml_node_get_int_attr_value (
+		node, attr_name, retval
+	);
+
+	if (retval < lower)
+		retval = lower;
+
+	if (retval > upper)
+		retval = upper;
+	return retval;
+}
+
+gint 
+xml_node_compare_with_name_func (
+	gconstpointer a,
+	gconstpointer b
+) {
+	return g_strcmp0((gchar *) b, ((XMLNode *) a)->name);
+}
+
+gint
+xml_node_compare_with_action_node_by_imageset_name_func (
+	gconstpointer a, 
+	gconstpointer b
+) {
+	return g_strcmp0("action", ((XMLNode *) a)->name) ||
+	       g_strcmp0((gchar *) b, xml_node_get_attr_value((XMLNode *) a, "imageset"));
+}
+
+gint
+xml_node_compare_with_attr_func (
+	const XMLNode *node,
+	const gchar **attr
+) {
+	return g_strcmp0(attr[1],
+	                 xml_node_get_attr_value(node, attr[0]));
+}
+
+static GMarkupParser parser;
+
+void _xml_free_g_func (XMLNode *node, gpointer user_data) {
+	xml_free (node);
+}
+
+void xml_free (XMLNode *node) {
+	g_free (node->name);
+
+	g_free (node->text);
+
+	g_strfreev (node->attributes);
+
+	g_list_foreach (node->sub_nodes, (GFunc) _xml_free_g_func, NULL);
+	g_list_free (node->sub_nodes);
+
+	g_slice_free (XMLNode, node);
+}
+
+static void _start_root_element_cb (	GMarkupParseContext *context,
+				        const gchar         *element_name,
+				        const gchar        **attribute_names,
+				        const gchar        **attribute_values,
+				        gpointer             user_data,
+				        GError             **error
+) {
+	XMLNode **node = (XMLNode **) user_data;
+	XMLNode  *p;
+	GArray   *attributes;
+
+	g_assert (node != NULL);
+
+	p = g_slice_new0 (XMLNode);
+	p->name = g_strdup (element_name);
+
+	attributes = g_array_new (TRUE, TRUE, sizeof (gchar *));
+	while (*attribute_names != NULL && *attribute_values != NULL) {
+		gchar *p2;
+		p2 = g_strdup (*attribute_names++);
+		g_array_append_val (attributes, p2);
+		p2 = g_strdup (*attribute_values++);
+		g_array_append_val (attributes, p2);
+	}
+
+	p->attributes = (gchar **) g_array_free (attributes, FALSE);
+
+	g_markup_parse_context_push (context, &parser, p);
+	*node = p;
+}
+
+
+static void _start_element_cb (
+	GMarkupParseContext *context,
+   	const gchar         *element_name,
+   	const gchar        **attribute_names,
+  	const gchar        **attribute_values,
+   	gpointer             user_data,
+   	GError             **error
+) {
+	XMLNode *p, *node = (XMLNode *) user_data;
+	GArray  *attributes;
+	gint char_n, line_n;
+
+	if (node->text) {
+		g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT, " ");
+		return;
+	}
+
+	p = g_slice_new0 (XMLNode);
+
+	node->sub_nodes = g_list_append (node->sub_nodes, p);
+	g_markup_parse_context_push (context, &parser, p);
+
+	p->name = g_strdup (element_name);
+
+	attributes = g_array_new (TRUE, TRUE, sizeof (gchar *));
+	while (*attribute_names != NULL && *attribute_values != NULL) {
+		gchar *p2;
+		p2 = g_strdup (*attribute_names++);
+		g_array_append_val (attributes, p2);
+		p2 = g_strdup (*attribute_values++);
+		g_array_append_val (attributes, p2);
+	}
+
+	p->attributes = (gchar **)g_array_free (attributes, FALSE);
+
+	g_markup_parse_context_get_position(context, &line_n, &char_n);
+	p->line_no = line_n - (char_n <= 1 ? 1 : 0);
+}
+
+static void 
+_end_element_cb (
+	GMarkupParseContext *context,
+	const gchar         *element_name,
+	gpointer             user_data,
+	GError             **error
+) {
+	XMLNode *p = (XMLNode *) g_markup_parse_context_pop (context);
+
+	if (p->text && p->sub_nodes) {
+		g_warning ("Error");
+	}
+
+	if (p->text == NULL && p->sub_nodes == NULL) {
+		p->text = g_strdup ("");
+	}
+}
+
+static gboolean
+_is_space (
+	const gchar *text,
+	gsize text_len
+) {
+	gsize i = 0;
+
+	for (i = 0; text[i] != '\0' && i < text_len; i++) {
+		switch (text[i]) {
+		case '\t':
+		case ' ':
+		case '\n':
+		case '\r':
+			continue;
+		default:
+			return FALSE;
+		}
+	}
+
+	return TRUE;
+}
+
+static void 
+_text_cb (	
+	GMarkupParseContext *context,
+	const gchar         *text,
+	gsize                text_len,
+	gpointer             user_data,
+	GError             **error
+) {
+	XMLNode *p = (XMLNode *)user_data;
+
+	if (_is_space (text, text_len)) {
+		return;
+	}
+
+	if (p->sub_nodes || p->text) {
+		g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT, " ");
+		return;
+	}
+
+	p->text = g_strndup (text, text_len);
+}
+
+static GMarkupParser parser = {
+	_start_element_cb,
+	_end_element_cb,
+	_text_cb,
+	0,
+	0,
+};
+
+XMLNode *
+xml_parse_file (const gchar *filename) {
+	gboolean retval = FALSE;
+	GError *error = NULL;
+	GMarkupParseContext *context;
+	XMLNode *node;
+
+	static const GMarkupParser root_parser = {
+		_start_root_element_cb,
+		_end_element_cb,
+		_text_cb,
+		0,
+		0,
+	};
+
+	FILE *pf = fopen (filename, "r");
+
+	if (pf == NULL) {
+		return NULL;
+	}
+
+	do {
+		context = g_markup_parse_context_new (&root_parser, 0, &node, 0);
+
+		while (!feof (pf)) {
+			gchar buf[1024];
+			gssize len = 0;
+
+			len = fread (buf, 1, sizeof (buf), pf);
+			retval = g_markup_parse_context_parse (context, buf, len, &error);
+
+			if (!retval)
+				break;
+		}
+		fclose (pf);
+
+		if (!retval)
+			break;
+
+		retval = g_markup_parse_context_end_parse (context, &error);
+		if (!retval)
+			break;
+
+		g_markup_parse_context_free (context);
+
+		return node;
+	} while (0);
+
+	g_warning ("Parse %s failed: %s", filename, error->message);
+	g_error_free (error);
+	g_markup_parse_context_free (context);
+	return NULL;
+}
+
+XMLNode *
+xml_parse_buffer (const gchar *buffer, GError **error) {
+	gboolean retval;
+
+	GMarkupParseContext *context;
+	XMLNode *node;
+
+	static const GMarkupParser root_parser = {
+		_start_root_element_cb,
+		_end_element_cb,
+		_text_cb,
+		0,
+		0,
+	};
+
+	context = g_markup_parse_context_new (&root_parser, 0, &node, 0);
+
+	do {
+		retval = g_markup_parse_context_parse (context, buffer, strlen (buffer), error);
+		if (!retval)
+			break;
+
+		retval = g_markup_parse_context_end_parse (context, error);
+		if (!retval)
+			break;
+		g_markup_parse_context_free (context);
+		return node;
+	} while (0);
+
+	g_markup_parse_context_free (context);
+	return NULL;
+}
+
+
+static void output_indent (int level, GString *output) {
+	gint i;
+	for (i = 0; i < level; i++) {
+		g_string_append (output, "    ");
+	}
+}
+
+static void xml_output_indent (
+	const XMLNode *node, 
+	int level,
+	GString *output
+) {
+	gchar **attrs;
+
+	output_indent (level, output);
+	g_string_append_printf (output, "<%s", node->name);
+
+	attrs = node->attributes;
+
+	while (attrs != NULL && *attrs != NULL) {
+		g_string_append_printf (output, " %s", *(attrs++));
+		g_string_append_printf (output, "=\"%s\"", *(attrs++));
+	}
+
+	if (node->sub_nodes != NULL) {
+		GList *sub_node;
+		g_string_append (output, ">\n");
+
+		for (sub_node = node->sub_nodes; sub_node != NULL; sub_node = sub_node->next) {
+			xml_output_indent (sub_node->data, level + 1, output);
+		}
+		output_indent (level, output);
+		g_string_append_printf (output, "</%s>\n",node->name);
+	} else if (node->text != NULL) {
+		gchar *text = g_markup_escape_text (node->text, -1);
+		g_string_append_printf (output, ">%s</%s>\n", text, node->name);
+		g_free (text);
+	} else {
+		g_string_append (output, "/>\n");
+	}
+}
+
+void xml_output (const XMLNode *node, GString *output) {
+	xml_output_indent (node, 0, output);
+}
+
diff --git a/saedit/xml.h b/saedit/xml.h
new file mode 100644
index 0000000..2622f17
--- /dev/null
+++ b/saedit/xml.h
@@ -0,0 +1,70 @@
+#ifndef XML_H
+#define XML_H
+
+#include <stdio.h>
+#include <glib.h>
+#include "common.h"
+
+typedef struct {
+	gchar  *name;
+	gchar  *text;
+	gchar **attributes;
+	gint    line_no;
+	GList  *sub_nodes;
+} XMLNode;
+
+
+XMLNode *
+xml_parse_file (
+	const gchar *name
+);
+
+XMLNode *
+xml_parse_buffer (
+	const gchar *buffer,
+	GError **error
+);
+
+void xml_free (XMLNode *node);
+void xml_output (
+	const XMLNode  *node,
+	GString        *output
+);
+
+gchar **
+xml_attr_new (
+	const gchar *name,
+	const gchar *value
+);
+
+gchar *
+xml_node_get_attr_value (
+	const XMLNode *node,
+	const gchar   *attr_name
+);
+
+gint
+xml_node_get_int_attr_value (
+	const XMLNode *node,
+	const gchar *attr_name,
+	gint retval
+);
+
+gint
+xml_node_get_int_attr_value_limited (
+	const XMLNode *node,
+	const gchar   *attr_name,
+	gint           retval,
+	gint           lower,
+	gint           upper
+);
+
+
+gint	 xml_node_compare_with_name_func(gconstpointer a, gconstpointer b);
+
+/*
+gint	 xml_node_compare_with_action_node_by_imageset_name_func(gconstpointer a, gconstpointer b);
+gint	 xml_node_compare_with_attr_func(const XMLNode *node, const gchar **attr);
+*/
+
+#endif
diff --git a/saedit/xmlsetup.c b/saedit/xmlsetup.c
new file mode 100644
index 0000000..1036436
--- /dev/null
+++ b/saedit/xmlsetup.c
@@ -0,0 +1,165 @@
+#include "main.h"
+#include "xml.h"
+#include "xmlsetup.h"
+#include "config.h"
+#include "drawfuncs.h"
+
+GList *_xml_setup_layers = NULL;
+GList *_xml_setup_interactors = NULL;
+
+void
+xml_setup_setup (XMLNode *node) {
+	GList *l;
+	
+	g_return_if_fail (g_strcmp0 (node->name, "saedit") == 0);
+
+	for (l = node->sub_nodes; l != NULL; l = l->next) {
+		XMLNode *current = (XMLNode *) l->data;
+
+		if (g_strcmp0 (current->name, "layer") == 0) {
+			SDALayer *layer = NULL;
+			gint z_index = -1;
+			gint offset_x, offset_y;
+			gchar *type = xml_node_get_attr_value (current, "type");
+
+			if (type == NULL) {
+				/* TODO: layer type is not specified */
+				continue;
+			} 
+
+			if (g_strcmp0 (type, "repeater") == 0) {
+				Interactor **repeater;
+				SpriteContext *repeater_context;
+				XMLNode *sprite = NULL;
+				gchar *file;
+
+				file = xml_node_get_attr_value (current, "file");
+
+				if (file == NULL) {
+					/* TODO: file is not specified */
+				} else {
+					gchar *filename =
+						config_data_path_get_full_sprite_path (file);
+					
+					sprite = xml_parse_file (filename);
+
+
+					g_free (file);
+					g_free (filename);
+				}
+
+				repeater_context = sprite_context_new (
+					config_keys_get_data_folder_path ()
+				);
+
+				sprite_context_add_sprite (repeater_context, sprite, 0);
+				repeater = (Interactor **) g_new0 (gpointer, 1);
+				*repeater = interactor_new (repeater_context);
+
+				layer = sda_layer_new (
+					interactor_sprite_layer_draw_func,
+					repeater
+				);
+
+				interactor_add_repeater (interactor, *repeater);
+
+				_xml_setup_interactors = g_list_append (
+					_xml_setup_interactors,
+					repeater
+				);
+			} else 
+			if (g_strcmp0 (type, "background") == 0) {
+				GdkRGBA *rgba = (GdkRGBA *) g_new0 (GdkRGBA, 1);
+				gchar *color;
+
+				color = xml_node_get_attr_value (current, "color");
+
+				if (color != NULL && gdk_rgba_parse (rgba, color)) {
+					layer = sda_layer_new (
+						background_layer_draw_func,
+						rgba
+					);
+				} else {
+					/* TODO: color not specified or wrong */
+				}
+			} else {
+				/* TODO: unknown type of layer */
+			}
+
+			g_free (type);
+
+			if (layer == NULL) {
+				continue;
+			}
+
+			z_index = xml_node_get_int_attr_value (
+				current,
+				"zindex",
+				z_index
+			);
+
+			offset_x = xml_node_get_int_attr_value (
+				current,
+				"offsetX",
+				0
+			);
+
+			offset_y = xml_node_get_int_attr_value (
+				current,
+				"offsetY",
+				0
+			);
+
+			g_object_set (
+				G_OBJECT (layer),
+				"z-index", z_index,
+				"offset-x", offset_x,
+				"offset-y", offset_y,
+				NULL
+			);
+
+			sprite_drawing_area_add_layer (
+				SPRITE_DRAWING_AREA (d_area),
+				layer
+			);
+
+			_xml_setup_layers = g_list_append (
+				_xml_setup_layers,
+				layer
+			);
+		} else {
+			/* TODO: unknown tag in the setup */
+		}
+	}
+}
+
+void
+xml_setup_clear () {
+	GList *l;
+
+	for (l = _xml_setup_interactors; l != NULL; l = l->next) {
+		Interactor **intr = (Interactor **) l->data;
+		interactor_free (*intr);
+	}
+
+	for (l = _xml_setup_layers; l != NULL; l = l->next) {
+		SDALayer *layer = (SDALayer *) l->data;
+		gpointer user_data;
+
+		g_object_get (layer, "user-data", &user_data, NULL);
+		g_free (user_data);
+
+		sprite_drawing_area_remove_layer (
+			SPRITE_DRAWING_AREA (d_area),
+			layer
+		);
+
+		g_object_unref (layer);
+	}
+
+	g_list_free (_xml_setup_interactors);
+	g_list_free (_xml_setup_layers);
+
+	_xml_setup_interactors = NULL;
+	_xml_setup_layers = NULL;
+}
diff --git a/saedit/xmlsetup.h b/saedit/xmlsetup.h
new file mode 100644
index 0000000..37c9b65
--- /dev/null
+++ b/saedit/xmlsetup.h
@@ -0,0 +1,10 @@
+#ifndef _XML_SETUP_H_
+#define _XML_SETUP_H_
+
+void
+xml_setup_setup (XMLNode *node);
+
+void
+xml_setup_clear (void);
+
+#endif