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/*
* Copyright (C) 2013 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_GENERIC_FONT_FAMILY_SETTINGS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_GENERIC_FONT_FAMILY_SETTINGS_H_
#include "base/feature_list.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include <unicode/uscript.h>
namespace blink {
PLATFORM_EXPORT BASE_DECLARE_FEATURE(kGenericFontSettingCache);
class PLATFORM_EXPORT GenericFontFamilySettings {
DISALLOW_NEW();
public:
GenericFontFamilySettings() = default;
explicit GenericFontFamilySettings(const GenericFontFamilySettings&);
bool UpdateStandard(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& Standard(UScriptCode = USCRIPT_COMMON) const;
// crbug.com/40535332. In the argument of UpdateFixed(), Osaka font should
// be represented as "Osaka", and Fixed() returns "Osaka-Mono" for it.
bool UpdateFixed(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& Fixed(UScriptCode = USCRIPT_COMMON) const;
bool UpdateSerif(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& Serif(UScriptCode = USCRIPT_COMMON) const;
bool UpdateSansSerif(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& SansSerif(UScriptCode = USCRIPT_COMMON) const;
bool UpdateCursive(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& Cursive(UScriptCode = USCRIPT_COMMON) const;
bool UpdateFantasy(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& Fantasy(UScriptCode = USCRIPT_COMMON) const;
bool UpdateMath(const AtomicString&, UScriptCode = USCRIPT_COMMON);
const AtomicString& Math(UScriptCode = USCRIPT_COMMON) const;
// Only called by InternalSettings to clear font family maps.
void Reset();
GenericFontFamilySettings& operator=(const GenericFontFamilySettings&);
private:
// UScriptCode uses -1 and 0 for UScriptInvalidCode and UScriptCommon.
// We need to use -2 and -3 for empty value and deleted value.
using UScriptCodeHashTraits = IntHashTraits<int, -1, -3>;
typedef HashMap<int, AtomicString, UScriptCodeHashTraits> ScriptFontFamilyMap;
void SetGenericFontFamilyMap(ScriptFontFamilyMap&,
const AtomicString&,
UScriptCode);
// Warning: Calling this method might result in a synchronous IPC call, which
// waits until the browser process to load a font and blocks the current
// thread.
const AtomicString& GenericFontFamilyForScript(const ScriptFontFamilyMap&,
UScriptCode) const;
// Returns true if the first available font of `new_family` could be different
// from `old_first_available_family`.
bool ShouldUpdateFontFamily(const AtomicString& old_first_available_family,
const AtomicString& new_family) const;
ScriptFontFamilyMap standard_font_family_map_;
ScriptFontFamilyMap serif_font_family_map_;
ScriptFontFamilyMap fixed_font_family_map_;
ScriptFontFamilyMap sans_serif_font_family_map_;
ScriptFontFamilyMap cursive_font_family_map_;
ScriptFontFamilyMap fantasy_font_family_map_;
ScriptFontFamilyMap math_font_family_map_;
// For the given font families, caches the first available font. If none of
// them is available, the value will be the first font of the given
// families. To save memory, the key should contain more than one font, in
// the format of ",font1, font2, ...".
mutable HashMap<AtomicString, AtomicString>
first_available_font_for_families_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_GENERIC_FONT_FAMILY_SETTINGS_H_
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