| /* |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "web/WebFontImpl.h" |
| |
| #include "platform/fonts/FontCache.h" |
| #include "platform/fonts/FontDescription.h" |
| #include "platform/graphics/GraphicsContext.h" |
| #include "platform/text/TextRun.h" |
| #include "public/platform/WebFloatPoint.h" |
| #include "public/platform/WebFloatRect.h" |
| #include "public/platform/WebRect.h" |
| #include "public/web/WebFontDescription.h" |
| #include "public/web/WebTextRun.h" |
| #include <skia/ext/platform_canvas.h> |
| |
| using namespace WebCore; |
| |
| namespace blink { |
| |
| WebFont* WebFont::create(const WebFontDescription& desc) |
| { |
| return new WebFontImpl(desc); |
| } |
| |
| WebFontImpl::WebFontImpl(const FontDescription& desc) |
| : m_font(desc) |
| { |
| m_font.update(nullptr); |
| } |
| |
| WebFontDescription WebFontImpl::fontDescription() const |
| { |
| return WebFontDescription(m_font.fontDescription()); |
| } |
| |
| int WebFontImpl::ascent() const |
| { |
| return m_font.fontMetrics().ascent(); |
| } |
| |
| int WebFontImpl::descent() const |
| { |
| return m_font.fontMetrics().descent(); |
| } |
| |
| int WebFontImpl::height() const |
| { |
| return m_font.fontMetrics().height(); |
| } |
| |
| int WebFontImpl::lineSpacing() const |
| { |
| return m_font.fontMetrics().lineSpacing(); |
| } |
| |
| float WebFontImpl::xHeight() const |
| { |
| return m_font.fontMetrics().xHeight(); |
| } |
| |
| void WebFontImpl::drawText(WebCanvas* canvas, const WebTextRun& run, const WebFloatPoint& leftBaseline, |
| WebColor color, const WebRect& clip, bool canvasIsOpaque, |
| int from, int to) const |
| { |
| FontCachePurgePreventer fontCachePurgePreventer; |
| WebCore::FloatRect textClipRect(clip); |
| TextRun textRun(run); |
| TextRunPaintInfo runInfo(textRun); |
| runInfo.from = from; |
| runInfo.to = to == -1 ? textRun.length() : to; |
| runInfo.bounds = textClipRect; |
| GraphicsContext gc(canvas); |
| |
| gc.save(); |
| gc.setCertainlyOpaque(canvasIsOpaque); |
| gc.setFillColor(color); |
| gc.clip(textClipRect); |
| m_font.drawText(&gc, runInfo, leftBaseline); |
| gc.restore(); |
| } |
| |
| int WebFontImpl::calculateWidth(const WebTextRun& run) const |
| { |
| FontCachePurgePreventer fontCachePurgePreventer; |
| return m_font.width(run, 0); |
| } |
| |
| int WebFontImpl::offsetForPosition(const WebTextRun& run, float position) const |
| { |
| FontCachePurgePreventer fontCachePurgePreventer; |
| return m_font.offsetForPosition(run, position, true); |
| } |
| |
| WebFloatRect WebFontImpl::selectionRectForText(const WebTextRun& run, const WebFloatPoint& leftBaseline, int height, int from, int to) const |
| { |
| FontCachePurgePreventer fontCachePurgePreventer; |
| return m_font.selectionRectForText(run, leftBaseline, height, from, to); |
| } |
| |
| } // namespace blink |