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Diffstat (limited to 'src/textmanager.cpp')
| -rw-r--r-- | src/textmanager.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/textmanager.cpp b/src/textmanager.cpp new file mode 100644 index 000000000..348ab829b --- /dev/null +++ b/src/textmanager.cpp @@ -0,0 +1,170 @@ +/* + * Support for non-overlapping floating text + * Copyright (C) 2008 Douglas Boffey <DougABoffey@netscape.net> + * + * This file is part of The Mana Client. + * + * 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 + * 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/>. + */ + +#include "textmanager.h" + +#include "text.h" + +#include <cstring> + +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(gcn::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 _UNUSED_, int &y, int h) +{ + int xLeft = textObj->mX; + int xRight1 = xLeft + textObj->mWidth; + const int TEST = 50; // Number of lines to test for text + const int nBeings = 50; + 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 + int cnt = 0; + + for (TextList::const_iterator ptr = mTextList.begin(), + pEnd = mTextList.end(); ptr != pEnd && cnt < nBeings; ++ptr, cnt ++) + { + if (*ptr != omit && + (*ptr)->mX + 1 <= xRight1 && + (*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; + } +} |