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257 lines
8.3 KiB
257 lines
8.3 KiB
/* The MIT License
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*
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* Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "textarea.h"
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#include "graphics.h"
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#include "core/engine.h"
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TextArea::TextArea() :
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m_font(0),
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m_align(ALIGN_TOP_LEFT),
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m_color(Color::white),
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m_cursorPos(-1),
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m_cursorVisible(false)
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{
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}
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TextArea::TextArea(Font* font,
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const std::string& text,
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const Rect& screenCoords,
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int align,
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const Color& color) :
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m_font(font),
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m_text(text),
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m_screenCoords(screenCoords),
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m_align(align),
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m_color(color),
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m_cursorPos(-1),
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m_cursorVisible(false)
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{
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recalculate();
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}
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void TextArea::draw()
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{
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int numGlyphs = m_text.length();
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const TexturePtr& texture = m_font->getTexture();
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for(int i=0;i<numGlyphs;++i) {
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g_graphics.drawTexturedRect(m_glyphsCoords[i], texture, m_glyphsTexCoords[i], m_color);
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}
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// render cursor
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if(m_cursorVisible && m_cursorPos >= 0 && m_cursorPos <= numGlyphs) {
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const int delay = 500;
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int ticks = g_engine.getLastFrameTicks();
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// draw every 500ms
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if(ticks - m_cursorTicks <= delay) {
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Rect cursorRect;
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if(m_cursorPos == 0)
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cursorRect = Rect(m_drawArea.left()-1, m_drawArea.top(), 1, m_font->getGlyphHeight());
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else if(m_cursorPos == numGlyphs)
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cursorRect = Rect(m_glyphsCoords[m_cursorPos-1].right(), m_glyphsCoords[m_cursorPos-1].top(), 1, m_font->getGlyphHeight());
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else
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cursorRect = Rect(m_glyphsCoords[m_cursorPos-1].right(), m_glyphsCoords[m_cursorPos-1].top(), 1, m_font->getGlyphHeight());
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g_graphics.drawFilledRect(cursorRect, m_color);
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} else if(ticks - m_cursorTicks >= 2*delay) {
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m_cursorTicks = g_engine.getLastFrameTicks();
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}
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}
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}
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void TextArea::recalculate()
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{
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// prevent glitches from invalid rects
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if(!m_screenCoords.isValid())
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return;
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int textLenght = m_text.length();
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m_glyphsCoords.clear();
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m_glyphsTexCoords.clear();
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m_glyphsCoords.resize(textLenght);
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m_glyphsTexCoords.resize(textLenght);
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// map glyphs positions
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Size textBoxSize;
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std::vector<Point> glyphsPositions = m_font->calculateGlyphsPositions(m_text, m_align, &textBoxSize);
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const Rect *glyphsTextureCoords = m_font->getGlyphsTextureCoords();
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const Size *glyphsSize = m_font->getGlyphsSize();
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m_drawArea.setLeft(m_screenCoords.left());
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m_drawArea.setTop(m_screenCoords.top()+m_font->getTopMargin());
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m_drawArea.setRight(m_screenCoords.right());
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m_drawArea.setBottom(m_screenCoords.bottom());
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for(int i = 0; i < textLenght; ++i) {
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int glyph = (uchar)m_text[i];
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// skip invalid glyphs
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if(glyph < 32)
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continue;
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// calculate initial glyph rect and texture coords
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Rect glyphScreenCoords(glyphsPositions[i], glyphsSize[glyph]);
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Rect glyphTextureCoords = glyphsTextureCoords[glyph];
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// first translate to align position
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if(m_align & ALIGN_BOTTOM) {
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glyphScreenCoords.translate(0, m_screenCoords.height() - textBoxSize.height());
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} else if(m_align & ALIGN_VERTICAL_CENTER) {
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glyphScreenCoords.translate(0, (m_screenCoords.height() - textBoxSize.height()) / 2);
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} else { // ALIGN_TOP
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// nothing to do
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}
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if(m_align & ALIGN_RIGHT) {
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glyphScreenCoords.translate(m_screenCoords.width() - textBoxSize.width(), 0);
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} else if(m_align & ALIGN_HORIZONTAL_CENTER) {
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glyphScreenCoords.translate((m_screenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // ALIGN_TOP
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// nothing to do
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}
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// only render glyphs that are after startRenderPosition
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if(glyphScreenCoords.bottom() < m_startInternalPos.y || glyphScreenCoords.right() < m_startInternalPos.x)
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continue;
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// bound glyph topLeft to startRenderPosition
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if(glyphScreenCoords.top() < m_startInternalPos.y) {
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glyphTextureCoords.setTop(glyphTextureCoords.top() + (m_startInternalPos.y - glyphScreenCoords.top()));
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glyphScreenCoords.setTop(m_startInternalPos.y);
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}
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if(glyphScreenCoords.left() < m_startInternalPos.x) {
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glyphTextureCoords.setLeft(glyphTextureCoords.left() + (m_startInternalPos.x - glyphScreenCoords.left()));
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glyphScreenCoords.setLeft(m_startInternalPos.x);
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}
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// subtract startInternalPos
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glyphScreenCoords.translate(-m_startInternalPos);
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// translate rect to screen coords
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glyphScreenCoords.translate(m_screenCoords.topLeft());
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// only render if glyph rect is visible on screenCoords
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if(!m_screenCoords.intersects(glyphScreenCoords))
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continue;
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// bound glyph bottomRight to screenCoords bottomRight
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if(glyphScreenCoords.bottom() > m_screenCoords.bottom()) {
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glyphTextureCoords.setBottom(glyphTextureCoords.bottom() + (m_screenCoords.bottom() - glyphScreenCoords.bottom()));
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glyphScreenCoords.setBottom(m_screenCoords.bottom());
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}
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if(glyphScreenCoords.right() > m_screenCoords.right()) {
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glyphTextureCoords.setRight(glyphTextureCoords.right() + (m_screenCoords.right() - glyphScreenCoords.right()));
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glyphScreenCoords.setRight(m_screenCoords.right());
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}
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// render glyph
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m_glyphsCoords[i] = glyphScreenCoords;
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m_glyphsTexCoords[i] = glyphTextureCoords;
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}
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}
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void TextArea::setFont(Font* font)
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{
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m_font = font;
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recalculate();
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}
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void TextArea::setText(const std::string& text)
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{
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m_text = text;
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if(m_cursorPos >= 0) {
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m_cursorPos = 0;
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m_cursorTicks = g_engine.getLastFrameTicks();
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}
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recalculate();
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}
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void TextArea::setScreenCoords(Rect screenCoords)
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{
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m_screenCoords = screenCoords;
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recalculate();
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}
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void TextArea::setAlign(int align)
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{
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m_align = align;
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recalculate();
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}
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void TextArea::setStartInternalPos(Point startPos)
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{
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m_startInternalPos = startPos;
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recalculate();
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}
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void TextArea::enableCursor(bool enable)
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{
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if(enable) {
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m_cursorPos = 0;
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m_cursorTicks = g_engine.getLastFrameTicks();
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} else
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m_cursorPos = -1;
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}
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void TextArea::appendCharacter(char c)
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{
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if(m_cursorPos >= 0) {
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std::string tmp;
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tmp = c;
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m_text.insert(m_cursorPos, tmp);
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m_cursorPos++;
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m_cursorTicks = g_engine.getLastFrameTicks();
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recalculate();
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}
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}
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void TextArea::removeCharacter(bool right)
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{
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if(m_cursorPos >= 0) {
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if(right && (uint)m_cursorPos < m_text.length())
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m_text.erase(m_text.begin() + m_cursorPos);
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else if((uint)m_cursorPos <= m_text.length() && m_cursorPos > 0) {
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m_text.erase(m_text.begin() + (--m_cursorPos));
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m_cursorTicks = g_engine.getLastFrameTicks();
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}
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recalculate();
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}
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}
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void TextArea::moveCursor(bool right)
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{
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if(right) {
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if((uint)m_cursorPos+1 <= m_text.length()) {
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m_cursorPos++;
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m_cursorTicks = g_engine.getLastFrameTicks();
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}
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} else {
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if(m_cursorPos-1 >= 0) {
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m_cursorPos--;
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m_cursorTicks = g_engine.getLastFrameTicks();
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}
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}
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}
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