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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "public/platform/WebFont.h"
#include "platform/fonts/Font.h"
#include "platform/fonts/FontCache.h"
#include "platform/fonts/FontDescription.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/paint/DrawingRecorder.h"
#include "platform/graphics/paint/SkPictureBuilder.h"
#include "platform/text/TextRun.h"
#include "public/platform/WebFloatPoint.h"
#include "public/platform/WebFloatRect.h"
#include "public/platform/WebFontDescription.h"
#include "public/platform/WebRect.h"
#include "public/platform/WebTextRun.h"
namespace blink {
WebFont* WebFont::create(const WebFontDescription& description) {
return new WebFont(description);
}
class WebFont::Impl final {
public:
explicit Impl(const WebFontDescription& description) : m_font(description) {
m_font.update(nullptr);
}
const Font& getFont() const { return m_font; }
private:
Font m_font;
};
WebFont::WebFont(const WebFontDescription& description)
: m_private(new Impl(description)) {}
WebFont::~WebFont() {}
WebFontDescription WebFont::getFontDescription() const {
return WebFontDescription(m_private->getFont().getFontDescription());
}
static inline const SimpleFontData* getFontData(const Font& font) {
const SimpleFontData* fontData = font.primaryFont();
DCHECK(fontData);
return fontData;
}
int WebFont::ascent() const {
const SimpleFontData* fontData = getFontData(m_private->getFont());
return fontData ? fontData->getFontMetrics().ascent() : 0;
}
int WebFont::descent() const {
const SimpleFontData* fontData = getFontData(m_private->getFont());
return fontData ? fontData->getFontMetrics().descent() : 0;
}
int WebFont::height() const {
const SimpleFontData* fontData = getFontData(m_private->getFont());
return fontData ? fontData->getFontMetrics().height() : 0;
}
int WebFont::lineSpacing() const {
const SimpleFontData* fontData = getFontData(m_private->getFont());
return fontData ? fontData->getFontMetrics().lineSpacing() : 0;
}
float WebFont::xHeight() const {
const SimpleFontData* fontData = m_private->getFont().primaryFont();
DCHECK(fontData);
return fontData ? fontData->getFontMetrics().xHeight() : 0;
}
void WebFont::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;
IntRect intRect(clip);
SkPictureBuilder pictureBuilder(intRect);
GraphicsContext& context = pictureBuilder.context();
{
DrawingRecorder drawingRecorder(context, pictureBuilder,
DisplayItem::kWebFont, intRect);
context.save();
context.setFillColor(color);
context.clip(textClipRect);
context.drawText(m_private->getFont(), runInfo, leftBaseline);
context.restore();
}
pictureBuilder.endRecording()->playback(canvas);
}
int WebFont::calculateWidth(const WebTextRun& run) const {
return m_private->getFont().width(run, 0);
}
int WebFont::offsetForPosition(const WebTextRun& run, float position) const {
return m_private->getFont().offsetForPosition(run, position, true);
}
WebFloatRect WebFont::selectionRectForText(const WebTextRun& run,
const WebFloatPoint& leftBaseline,
int height,
int from,
int to) const {
return m_private->getFont().selectionRectForText(run, leftBaseline, height,
from, to);
}
} // namespace blink
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