text: /*
   * 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"
  
  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) const
  {
      FontCachePurgePreventer fontCachePurgePreventer;
      FloatRect textClipRect(clip);
      TextRun textRun(run);
      TextRunPaintInfo runInfo(textRun);
      runInfo.bounds = textClipRect;
      OwnPtr<GraphicsContext> gc = GraphicsContext::deprecatedCreateWithCanvas(canvas);
  
      gc->save();
      gc->setFillColor(color);
      gc->clip(textClipRect);
      gc->drawText(m_font, runInfo, leftBaseline);
      gc->restore();
  }
  
  int WebFontImpl::calculateWidth(const WebTextRun& run) const
  {
      return m_font.width(run, 0);
  }
  
  int WebFontImpl::offsetForPosition(const WebTextRun& run, float position) const
  {
      return m_font.offsetForPosition(run, position, true);
  }
  
  WebFloatRect WebFontImpl::selectionRectForText(const WebTextRun& run, const WebFloatPoint& leftBaseline, int height, int from, int to) const
  {
      return m_font.selectionRectForText(run, leftBaseline, height, from, to);
  }
  
  } // namespace blink
  