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/*
* 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 "WebFontImpl.h"
#include <skia/ext/platform_canvas.h>
#include "WebFontDescription.h"
#include "WebTextRun.h"
#include "core/platform/graphics/Font.h"
#include "core/platform/graphics/FontCache.h"
#include "core/platform/graphics/GraphicsContext.h"
#include "platform/fonts/FontDescription.h"
#include "platform/graphics/TextRun.h"
#include "public/platform/WebFloatPoint.h"
#include "public/platform/WebFloatRect.h"
#include "public/platform/WebRect.h"
using namespace WebCore;
namespace WebKit {
WebFont* WebFont::create(const WebFontDescription& desc)
{
return new WebFontImpl(desc, desc.letterSpacing, desc.wordSpacing);
}
WebFontImpl::WebFontImpl(const FontDescription& desc, float letterSpacing, float wordSpacing)
: m_font(desc, letterSpacing, wordSpacing)
{
m_font.update(0);
}
WebFontDescription WebFontImpl::fontDescription() const
{
return WebFontDescription(m_font.fontDescription(), m_font.letterSpacing(), m_font.wordSpacing());
}
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 WebKit