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356 lines
12 KiB
356 lines
12 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 <prerequisites.h>
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#include <core/engine.h>
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#include <graphics/textarea.h>
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#include <graphics/graphics.h>
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TextArea::TextArea() :
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m_align(AlignLeftCenter),
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m_color(Color::white),
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m_cursorPos(-1),
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m_startRenderPos(0),
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m_cursorVisible(false)
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{
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}
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TextArea::TextArea(FontPtr font,
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const std::string& text,
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const Rect& screenCoords,
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AlignmentFlag 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_startRenderPos(0),
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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 textLength = m_text.length();
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const TexturePtr& texture = m_font->getTexture();
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for(int i=0;i<textLength;++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) {
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assert(m_cursorPos <= textLength);
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const int delay = 500;
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int ticks = g_engine.getCurrentFrameTicks();
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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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// when cursor is at 0 or is the first visible element
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if(m_cursorPos == 0 || m_cursorPos == m_startRenderPos)
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cursorRect = Rect(m_drawArea.left()-1, m_drawArea.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.getCurrentFrameTicks();
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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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int textLength = m_text.length();
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// prevent glitches
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if(!m_screenCoords.isValid() || !m_font)
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return;
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// map glyphs positions
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Size textBoxSize;
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const 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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int glyph;
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// resize just on demand
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if(textLength > (int)m_glyphsCoords.size()) {
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m_glyphsCoords.resize(textLength);
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m_glyphsTexCoords.resize(textLength);
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}
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// readjust start view area based on cursor position
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if(m_cursorPos >= 0 && textLength > 0) {
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assert(m_cursorPos <= textLength);
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if(m_cursorPos < m_startRenderPos) // cursor is before the previuos first rendered glyph, so we need to update
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{
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m_startInternalPos.x = glyphsPositions[m_cursorPos].x;
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m_startInternalPos.y = glyphsPositions[m_cursorPos].y - m_font->getTopMargin();
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m_startRenderPos = m_cursorPos;
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} else if(m_cursorPos > m_startRenderPos || // cursor is after the previuos first rendered glyph
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(m_cursorPos == m_startRenderPos && textLength == m_cursorPos)) // cursor is at the previuos rendered element, and is the last text element
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{
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Rect virtualRect(m_startInternalPos, m_screenCoords.size()); // previus rendered virtual rect
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int pos = m_cursorPos - 1; // element before cursor
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glyph = (uchar)m_text[pos]; // glyph of the element before cursor
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Rect glyphRect(glyphsPositions[pos], glyphsSize[glyph]);
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// if the cursor is not on the previus rendered virtual rect we need to update it
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if(!virtualRect.contains(glyphRect.topLeft()) || !virtualRect.contains(glyphRect.bottomRight())) {
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// calculate where is the first glyph visible
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Point startGlyphPos;
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startGlyphPos.y = std::max(glyphRect.bottom() - virtualRect.height(), 0);
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startGlyphPos.x = std::max(glyphRect.right() - virtualRect.width(), 0);
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// find that glyph
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for(pos = 0; pos < textLength; ++pos) {
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glyph = (uchar)m_text[pos];
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glyphRect = Rect(glyphsPositions[pos], glyphsSize[glyph]);
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glyphRect.setTop(std::max(glyphRect.top() - m_font->getTopMargin() - m_font->getGlyphSpacing().height(), 0));
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glyphRect.setLeft(std::max(glyphRect.left() - m_font->getGlyphSpacing().width(), 0));
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// first glyph entirely visible found
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if(glyphRect.topLeft() >= startGlyphPos) {
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m_startInternalPos.x = glyphsPositions[pos].x;
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m_startInternalPos.y = glyphsPositions[pos].y - m_font->getTopMargin();
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m_startRenderPos = pos;
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break;
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}
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}
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}
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}
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} else {
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m_startInternalPos = Point(0,0);
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}
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m_drawArea = m_screenCoords;
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if(m_align & AlignBottom) {
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m_drawArea.translate(0, m_screenCoords.height() - textBoxSize.height());
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} else if(m_align & AlignVerticalCenter) {
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m_drawArea.translate(0, (m_screenCoords.height() - textBoxSize.height()) / 2);
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} else { // AlignTop
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}
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if(m_align & AlignRight) {
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m_drawArea.translate(m_screenCoords.width() - textBoxSize.width(), 0);
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} else if(m_align & AlignHorizontalCenter) {
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m_drawArea.translate((m_screenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // AlignLeft
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}
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for(int i = 0; i < textLength; ++i) {
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glyph = (uchar)m_text[i];
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m_glyphsCoords[i].clear();
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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 & AlignBottom) {
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glyphScreenCoords.translate(0, m_screenCoords.height() - textBoxSize.height());
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} else if(m_align & AlignVerticalCenter) {
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glyphScreenCoords.translate(0, (m_screenCoords.height() - textBoxSize.height()) / 2);
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} else { // AlignTop
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// nothing to do
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}
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if(m_align & AlignRight) {
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glyphScreenCoords.translate(m_screenCoords.width() - textBoxSize.width(), 0);
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} else if(m_align & AlignHorizontalCenter) {
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glyphScreenCoords.translate((m_screenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // AlignLeft
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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(FontPtr font)
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{
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if(m_font != font) {
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m_font = font;
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recalculate();
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}
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}
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void TextArea::setText(const std::string& text)
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{
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if(m_text != text) {
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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.getCurrentFrameTicks();
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}
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recalculate();
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}
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}
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void TextArea::setScreenCoords(const Rect& screenCoords)
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{
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if(screenCoords != m_screenCoords) {
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m_screenCoords = screenCoords;
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recalculate();
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}
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}
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void TextArea::setAlign(AlignmentFlag align)
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{
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if(m_align != align) {
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m_align = align;
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recalculate();
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}
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}
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void TextArea::setCursorPos(int pos)
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{
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if(pos != m_cursorPos) {
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if(pos < 0)
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m_cursorPos = 0;
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else if((uint)pos >= m_text.length())
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m_cursorPos = m_text.length();
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else
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m_cursorPos = pos;
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recalculate();
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}
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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.getCurrentFrameTicks();
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} else
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m_cursorPos = -1;
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recalculate();
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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.getCurrentFrameTicks();
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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 && m_text.length() > 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()) {
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m_text.erase(m_text.begin() + (--m_cursorPos));
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m_cursorTicks = g_engine.getCurrentFrameTicks();
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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.getCurrentFrameTicks();
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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.getCurrentFrameTicks();
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}
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}
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recalculate();
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}
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int TextArea::getTextPos(Point pos)
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{
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int textLength = m_text.length();
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// find any glyph that is actually on the
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int candidatePos = -1;
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for(int i=0;i<textLength;++i) {
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Rect clickGlyphRect = m_glyphsCoords[i];
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clickGlyphRect.addTop(m_font->getTopMargin() + m_font->getGlyphSpacing().height());
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clickGlyphRect.addLeft(m_font->getGlyphSpacing().width()+1);
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if(clickGlyphRect.contains(pos))
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return i;
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else if(pos.y >= clickGlyphRect.top() && pos.y <= clickGlyphRect.bottom()) {
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if(pos.x <= clickGlyphRect.left())
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candidatePos = i;
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else if(pos.x >= clickGlyphRect.right())
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candidatePos = i+1;
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}
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}
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return candidatePos;
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}
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