| /* |
| * 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_ |