third_party/blink/renderer/core/css/css_font_face_source.cc

/*
 * Copyright (C) 2007, 2008, 2010, 2011 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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#include "third_party/blink/renderer/core/css/css_font_face_source.h"

#include "third_party/blink/renderer/core/css/css_font_face.h"
#include "third_party/blink/renderer/platform/fonts/font_cache_key.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/fonts/font_face_creation_params.h"
#include "third_party/blink/renderer/platform/fonts/simple_font_data.h"

namespace blink {

CSSFontFaceSource::~CSSFontFaceSource() = default;

const SimpleFontData* CSSFontFaceSource::GetFontData(
    const FontDescription& font_description,
    const FontSelectionCapabilities& font_selection_capabilities) {
  // If the font hasn't loaded or an error occurred, then we've got nothing.
  if (!IsValid()) {
    ReportFontLookup(font_description, nullptr);
    return nullptr;
  }

  if (IsLocalNonBlocking()) {
    // We're local. Just return a SimpleFontData from the normal cache.
    return CreateFontData(font_description, font_selection_capabilities);
  }

  bool is_unique_match = false;
  FontCacheKey key =
      font_description.CacheKey(FontFaceCreationParams(), is_unique_match);

  auto result = font_data_table_.insert(key, nullptr);
  if (result.is_new_entry) {
    result.stored_value->value =
        CreateFontData(font_description, font_selection_capabilities);
  }
  return result.stored_value->value.Get();
}

}  // namespace blink