This source file includes following definitions.
- create
- fontDescription
- ascent
- descent
- height
- lineSpacing
- xHeight
- drawText
- calculateWidth
- offsetForPosition
- selectionRectForText
#include "config.h"
#include "WebFontImpl.h"
#include <skia/ext/platform_canvas.h>
#include "WebFontDescription.h"
#include "WebTextRun.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"
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);
}
}