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authorLloyd Bryant <lloyd_bryant@netzero.net>2008-07-18 00:48:14 +0000
committerLloyd Bryant <lloyd_bryant@netzero.net>2008-07-18 00:48:14 +0000
commit159285c5aa24611ceee7e3847a87bf9ea5f7fb7a (patch)
treefa48eb8bb8ed1e62ede1e7a2f95632c2243facab /src/textmanager.cpp
parent4dbc9b7af344d3ff006a40e3e0c06ce160f365f9 (diff)
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+/***************************************************************************
+ * Copyright (C) 2008 by Douglas Boffey *
+ * *
+ * DougABoffey@netscape.net *
+ * 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 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed with The Mana Experiment *
+ * 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, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+
+#include "textmanager.h"
+
+#include <cstring>
+
+#include "text.h"
+
+TextManager *textManager = 0;
+
+TextManager::TextManager()
+{
+}
+
+void TextManager::addText(Text *text)
+{
+ place(text, 0, text->mX, text->mY, text->mHeight);
+ mTextList.push_back(text);
+}
+
+void TextManager::moveText(Text *text, int x, int y)
+{
+ text->mX = x;
+ text->mY = y;
+ place(text, text, text->mX, text->mY, text->mHeight);
+}
+
+void TextManager::removeText(const Text *text)
+{
+ for (TextList::iterator ptr = mTextList.begin(),
+ pEnd = mTextList.end(); ptr != pEnd; ++ptr)
+ {
+ if (*ptr == text)
+ {
+ mTextList.erase(ptr);
+ return;
+ }
+ }
+}
+
+TextManager::~TextManager()
+{
+}
+
+void TextManager::draw(Graphics *graphics, int xOff, int yOff)
+{
+ for (TextList::iterator bPtr = mTextList.begin(), ePtr = mTextList.end();
+ bPtr != ePtr; ++bPtr)
+ {
+ (*bPtr)->draw(graphics, xOff, yOff);
+ }
+}
+
+void TextManager::place(const Text *textObj, const Text *omit,
+ int &x, int &y, int h)
+{
+ int xLeft = textObj->mX;
+ int xRight = xLeft + textObj->mWidth - 1;
+ const int TEST = 100; // Number of lines to test for text
+ bool occupied[TEST]; // is some other text obscuring this line?
+ std::memset(&occupied, 0, sizeof(occupied)); // set all to false
+ int wantedTop = (TEST - h) / 2; // Entry in occupied at top of text
+ int occupiedTop = y - wantedTop; // Line in map representing to of occupied
+
+ for (TextList::const_iterator ptr = mTextList.begin(),
+ pEnd = mTextList.end(); ptr != pEnd; ++ptr)
+ {
+ if (*ptr != omit &&
+ (*ptr)->mX <= xRight &&
+ (*ptr)->mX + (*ptr)->mWidth > xLeft)
+ {
+ int from = (*ptr)->mY - occupiedTop;
+ int to = from + (*ptr)->mHeight - 1;
+ if (to < 0 || from >= TEST) // out of range considered
+ {
+ continue;
+ }
+ if (from < 0)
+ {
+ from = 0;
+ }
+ if (to >= TEST)
+ {
+ to = TEST - 1;
+ }
+ for (int i = from; i <= to; ++i)
+ {
+ occupied[i] = true;
+ }
+ }
+ }
+ bool ok = true;
+ for (int i = wantedTop; i < wantedTop + h; ++i)
+ {
+ ok = ok && !occupied[i];
+ }
+ if (ok)
+ {
+ return;
+ }
+ // Have to move it up or down, so find nearest spaces either side
+ int consec = 0;
+ int upSlot = -1; // means not found
+ for (int seek = wantedTop + h - 2; seek >= 0; --seek)
+ {
+ if (occupied[seek])
+ {
+ consec = 0;
+ }
+ else
+ {
+ if (++consec == h)
+ {
+ upSlot = seek;
+ break;
+ }
+ }
+ }
+ int downSlot = -1;
+ consec = 0;
+ for (int seek = wantedTop + 1; seek < TEST; ++seek)
+ {
+ if (occupied[seek])
+ {
+ consec = 0;
+ }
+ else
+ {
+ if (++consec == h)
+ {
+ downSlot = seek - h + 1;
+ break;
+ }
+ }
+ }
+ if (upSlot == -1 && downSlot == -1) // no good solution, so leave as is
+ {
+ return;
+ }
+ if (upSlot == -1) // must go down
+ {
+ y += downSlot - wantedTop;
+ return;
+ }
+ if (downSlot == -1) // must go up
+ {
+ y -= wantedTop - upSlot;
+ return;
+ }
+ if (wantedTop - upSlot > downSlot - wantedTop) // down is better
+ {
+ y += downSlot - wantedTop;
+ }
+ else
+ {
+ y -= wantedTop - upSlot;
+ }
+}