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/*
* Copyright (C) 2013 Google, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_CUSTOM_FONT_DATA_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_CUSTOM_FONT_DATA_H_
#include "third_party/blink/renderer/core/css/css_font_face_source.h"
#include "third_party/blink/renderer/platform/fonts/custom_font_data.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
namespace blink {
class CSSCustomFontData final : public CustomFontData {
public:
enum FallbackVisibility { kInvisibleFallback, kVisibleFallback };
static scoped_refptr<CSSCustomFontData> Create(
RemoteFontFaceSource* source,
FallbackVisibility visibility) {
return base::AdoptRef(new CSSCustomFontData(source, visibility));
}
~CSSCustomFontData() override = default;
bool ShouldSkipDrawing() const override {
if (font_face_source_)
font_face_source_->PaintRequested();
return fallback_visibility_ == kInvisibleFallback && is_loading_;
}
void BeginLoadIfNeeded() const override {
if (!is_loading_ && font_face_source_) {
is_loading_ = true;
font_face_source_->BeginLoadIfNeeded();
}
}
bool IsLoading() const override { return is_loading_; }
bool IsLoadingFallback() const override { return true; }
void ClearFontFaceSource() override { font_face_source_ = nullptr; }
private:
CSSCustomFontData(RemoteFontFaceSource* source, FallbackVisibility visibility)
: font_face_source_(source),
fallback_visibility_(visibility),
is_loading_(false) {
if (source)
is_loading_ = source->IsLoading();
}
// TODO(Oilpan): consider moving (Custom)FontFace hierarchy to the heap,
// thereby making this reference a Member<>.
WeakPersistent<RemoteFontFaceSource> font_face_source_;
FallbackVisibility fallback_visibility_;
mutable bool is_loading_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_CUSTOM_FONT_DATA_H_