From 57b4d184f8c47c853ca49ffb56f99c0533c71d07 Mon Sep 17 00:00:00 2001
From: Guillaume Melquiond <guillaume.melquiond@gmail.com>
Date: Thu, 20 Sep 2007 22:17:21 +0000
Subject: Added support for unicode charset in textfields and chat.

Conflicts:

    src/Makefile.am
    src/game.cpp
    src/gui/browserbox.cpp
    src/gui/gui.cpp
    src/gui/textfield.cpp
    src/main.cpp

(cherry picked from mainline commit 7b67e852086ad3ccd98a622f890b245ab6a0a321)
---
 src/gui/textfield.cpp | 129 +++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 101 insertions(+), 28 deletions(-)

(limited to 'src/gui/textfield.cpp')

diff --git a/src/gui/textfield.cpp b/src/gui/textfield.cpp
index bd016a8d..d4709d3f 100644
--- a/src/gui/textfield.cpp
+++ b/src/gui/textfield.cpp
@@ -19,12 +19,15 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include "textfield.h"
+
 #include <algorithm>
 
 #include <guichan/font.hpp>
 
 #include <guichan/sdl/sdlinput.hpp>
 
+#include "sdlinput.h"
 #include "textfield.h"
 
 #include "../graphics.h"
@@ -34,6 +37,8 @@
 
 #include "../utils/dtor.h"
 
+#undef DELETE //Win32 compatibility hack
+
 int TextField::instances = 0;
 ImageRect TextField::skin;
 
@@ -123,34 +128,6 @@ void TextField::setNumeric(bool numeric)
     }
 }
 
-void TextField::keyPressed(gcn::KeyEvent &keyEvent)
-{
-    if (mNumeric)
-    {
-        while (true)
-        {
-            const gcn::Key &key = keyEvent.getKey();
-            if (key.isNumber())
-            {
-                break;
-            }
-            int value = key.getValue();
-            if (value == SDLK_LEFT || value == SDLK_RIGHT ||
-                value == SDLK_HOME || value == SDLK_END ||
-                value == SDLK_BACKSPACE || value == SDLK_DELETE)
-            {
-                break;
-            }
-            return;
-        }
-    }
-    gcn::TextField::keyPressed(keyEvent);
-    if (mListener)
-    {
-        mListener->listen(this);
-    }
-}
-
 int TextField::getValue() const
 {
     if (!mNumeric)
@@ -168,3 +145,99 @@ int TextField::getValue() const
     }
     return value;
 }
+
+void TextField::keyPressed(gcn::KeyEvent &keyEvent)
+{
+    int val = keyEvent.getKey().getValue();
+
+    if (val >= 32)
+    {
+        int l;
+        if (val < 128) l = 1;            // 0xxxxxxx
+        else if (val < 0x800) l = 2;     // 110xxxxx 10xxxxxx
+        else if (val < 0x10000) l = 3;   // 1110xxxx 10xxxxxx 10xxxxxx
+        else l = 4;                      // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+
+        char buf[4];
+        for (int i = 0; i < l; ++i)
+        {
+            buf[i] = val >> (6 * (l - i - 1));
+            if (i > 0) buf[i] = (buf[i] & 63) | 128;
+        }
+
+        if (l > 1) buf[0] |= 255 << (8 - l);
+
+        mText.insert(mCaretPosition, std::string(buf, buf + l));
+        mCaretPosition += l;
+    }
+
+    /* In UTF-8, 10xxxxxx is only used for inner parts of characters. So skip
+       them when processing key presses. */
+
+    switch (val)
+    {
+        case Key::LEFT:
+        {
+            while (mCaretPosition > 0)
+            {
+                --mCaretPosition;
+                if ((mText[mCaretPosition] & 192) != 128)
+                    break;
+            }
+        } break;
+
+        case Key::RIGHT:
+        {
+            unsigned sz = mText.size();
+            while (mCaretPosition < sz)
+            {
+                ++mCaretPosition;
+                if (mCaretPosition == sz ||
+                    (mText[mCaretPosition] & 192) != 128)
+                    break;
+            }
+        } break;
+
+        case Key::DELETE:
+        {
+            unsigned sz = mText.size();
+            while (mCaretPosition < sz)
+            {
+                --sz;
+                mText.erase(mCaretPosition, 1);
+                if (mCaretPosition == sz ||
+                    (mText[mCaretPosition] & 192) != 128)
+                    break;
+            }
+        } break;
+
+        case Key::BACKSPACE:
+        {
+            while (mCaretPosition > 0)
+            {
+                --mCaretPosition;
+                int v = mText[mCaretPosition];
+                mText.erase(mCaretPosition, 1);
+                if ((v & 192) != 128) break;
+            }
+        } break;
+
+        case Key::ENTER:
+            distributeActionEvent();
+            break;
+
+        case Key::HOME:
+            mCaretPosition = 0;
+            break;
+
+        case Key::END:
+            mCaretPosition = mText.size();
+            break;
+
+        case Key::TAB:
+            return;
+    }
+
+    keyEvent.consume();
+    fixScroll();
+}
-- 
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