/*
 * 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 CSSCustomFontData_h
#define CSSCustomFontData_h

#include "core/css/CSSFontFaceSource.h"
#include "platform/fonts/CustomFontData.h"
#include "platform/heap/Handle.h"

namespace blink {

class CSSCustomFontData final : public CustomFontData {
 public:
  enum FallbackVisibility { InvisibleFallback, VisibleFallback };

  static PassRefPtr<CSSCustomFontData> create(RemoteFontFaceSource* source,
                                              FallbackVisibility visibility) {
    return adoptRef(new CSSCustomFontData(source, visibility));
  }

  ~CSSCustomFontData() override {}

  bool shouldSkipDrawing() const override {
    if (m_fontFaceSource)
      m_fontFaceSource->paintRequested();
    return m_fallbackVisibility == InvisibleFallback && m_isLoading;
  }

  void beginLoadIfNeeded() const override {
    if (!m_isLoading && m_fontFaceSource) {
      m_isLoading = true;
      m_fontFaceSource->beginLoadIfNeeded();
    }
  }

  bool isLoading() const override { return m_isLoading; }
  bool isLoadingFallback() const override { return true; }
  void clearFontFaceSource() override { m_fontFaceSource = 0; }

 private:
  CSSCustomFontData(RemoteFontFaceSource* source, FallbackVisibility visibility)
      : m_fontFaceSource(source),
        m_fallbackVisibility(visibility),
        m_isLoading(false) {
    if (source)
      m_isLoading = source->isLoading();
  }

  // TODO(Oilpan): consider moving (Custom)FontFace hierarchy to the heap,
  // thereby making this reference a Member<>.
  WeakPersistent<RemoteFontFaceSource> m_fontFaceSource;
  FallbackVisibility m_fallbackVisibility;
  mutable bool m_isLoading;
};

}  // namespace blink

#endif  // CSSCustomFontData_h
