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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 "third_party/blink/public/platform/web_font.h"
#include "third_party/blink/public/platform/web_float_point.h"
#include "third_party/blink/public/platform/web_float_rect.h"
#include "third_party/blink/public/platform/web_font_description.h"
#include "third_party/blink/public/platform/web_rect.h"
#include "third_party/blink/public/platform/web_text_run.h"
#include "third_party/blink/renderer/platform/fonts/font.h"
#include "third_party/blink/renderer/platform/fonts/font_cache.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/fonts/text_run_paint_info.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/paint/drawing_recorder.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_record_builder.h"
#include "third_party/blink/renderer/platform/text/text_run.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
WebFont* WebFont::Create(const WebFontDescription& description) {
return new WebFont(description);
}
class WebFont::Impl final {
USING_FAST_MALLOC(WebFont::Impl);
public:
explicit Impl(const WebFontDescription& description) : font_(description) {
font_.Update(nullptr);
}
const Font& GetFont() const { return font_; }
private:
Font font_;
};
WebFont::WebFont(const WebFontDescription& description)
: private_(std::make_unique<Impl>(description)) {}
WebFont::~WebFont() = default;
WebFontDescription WebFont::GetFontDescription() const {
return WebFontDescription(private_->GetFont().GetFontDescription());
}
static inline const SimpleFontData* GetFontData(const Font& font) {
const SimpleFontData* font_data = font.PrimaryFont();
DCHECK(font_data);
return font_data;
}
int WebFont::Ascent() const {
const SimpleFontData* font_data = GetFontData(private_->GetFont());
return font_data ? font_data->GetFontMetrics().Ascent() : 0;
}
int WebFont::Descent() const {
const SimpleFontData* font_data = GetFontData(private_->GetFont());
return font_data ? font_data->GetFontMetrics().Descent() : 0;
}
int WebFont::Height() const {
const SimpleFontData* font_data = GetFontData(private_->GetFont());
return font_data ? font_data->GetFontMetrics().Height() : 0;
}
int WebFont::LineSpacing() const {
const SimpleFontData* font_data = GetFontData(private_->GetFont());
return font_data ? font_data->GetFontMetrics().LineSpacing() : 0;
}
float WebFont::XHeight() const {
const SimpleFontData* font_data = private_->GetFont().PrimaryFont();
DCHECK(font_data);
return font_data ? font_data->GetFontMetrics().XHeight() : 0;
}
void WebFont::DrawText(cc::PaintCanvas* canvas,
const WebTextRun& run,
const WebFloatPoint& left_baseline,
SkColor color) const {
FontCachePurgePreventer font_cache_purge_preventer;
TextRun text_run(run);
TextRunPaintInfo run_info(text_run);
PaintRecordBuilder builder;
GraphicsContext& context = builder.Context();
{
DrawingRecorder recorder(context, builder, DisplayItem::kWebFont);
context.Save();
context.SetFillColor(color);
context.DrawText(private_->GetFont(), run_info, left_baseline,
kInvalidDOMNodeId);
context.Restore();
}
builder.EndRecording(*canvas);
}
int WebFont::CalculateWidth(const WebTextRun& run) const {
return private_->GetFont().Width(run, nullptr);
}
int WebFont::OffsetForPosition(const WebTextRun& run, float position) const {
return private_->GetFont().OffsetForPosition(
run, position, IncludePartialGlyphs, DontBreakGlyphs);
}
WebFloatRect WebFont::SelectionRectForText(const WebTextRun& run,
const WebFloatPoint& left_baseline,
int height,
int from,
int to) const {
return private_->GetFont().SelectionRectForText(run, left_baseline, height,
from, to);
}
} // namespace blink
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