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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:
*
* 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 INC. AND ITS 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 APPLE INC. OR ITS 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 FontFaceSet_h
#define FontFaceSet_h
#include "bindings/core/v8/Iterable.h"
#include "bindings/core/v8/ScriptPromise.h"
#include "core/css/FontFace.h"
#include "core/dom/Document.h"
#include "core/dom/SuspendableObject.h"
#include "core/events/EventListener.h"
#include "core/events/EventTarget.h"
#include "platform/AsyncMethodRunner.h"
#include "platform/heap/Handle.h"
#include "wtf/Allocator.h"
#include "wtf/Vector.h"
// Mac OS X 10.6 SDK defines check() macro that interferes with our check()
// method
#ifdef check
#undef check
#endif
namespace blink {
class CSSFontSelector;
class ExceptionState;
class Font;
class FontFaceCache;
class ExecutionContext;
using FontFaceSetIterable = PairIterable<Member<FontFace>, Member<FontFace>>;
class FontFaceSet final : public EventTargetWithInlineData,
public Supplement<Document>,
public SuspendableObject,
public FontFaceSetIterable,
public FontFace::LoadFontCallback {
USING_GARBAGE_COLLECTED_MIXIN(FontFaceSet);
DEFINE_WRAPPERTYPEINFO();
WTF_MAKE_NONCOPYABLE(FontFaceSet);
public:
~FontFaceSet() override;
DEFINE_ATTRIBUTE_EVENT_LISTENER(loading);
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingdone);
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingerror);
bool check(const String& font, const String& text, ExceptionState&);
ScriptPromise load(ScriptState*, const String& font, const String& text);
ScriptPromise ready(ScriptState*);
FontFaceSet* addForBinding(ScriptState*, FontFace*, ExceptionState&);
void clearForBinding(ScriptState*, ExceptionState&);
bool deleteForBinding(ScriptState*, FontFace*, ExceptionState&);
bool hasForBinding(ScriptState*, FontFace*, ExceptionState&) const;
size_t size() const;
AtomicString status() const;
ExecutionContext* getExecutionContext() const override;
const AtomicString& interfaceName() const override;
Document* document() const;
void didLayout();
void beginFontLoading(FontFace*);
// FontFace::LoadFontCallback
void notifyLoaded(FontFace*) override;
void notifyError(FontFace*) override;
size_t approximateBlankCharacterCount() const;
// SuspendableObject
void suspend() override;
void resume() override;
void contextDestroyed(ExecutionContext*) override;
static FontFaceSet* from(Document&);
static void didLayout(Document&);
static size_t approximateBlankCharacterCount(Document&);
static const char* supplementName() { return "FontFaceSet"; }
void addFontFacesToFontFaceCache(FontFaceCache*, CSSFontSelector*);
DECLARE_VIRTUAL_TRACE();
private:
static FontFaceSet* create(Document& document) {
return new FontFaceSet(document);
}
FontFaceSetIterable::IterationSource* startIteration(
ScriptState*,
ExceptionState&) override;
class IterationSource final : public FontFaceSetIterable::IterationSource {
public:
explicit IterationSource(const HeapVector<Member<FontFace>>& fontFaces)
: m_index(0), m_fontFaces(fontFaces) {}
bool next(ScriptState*,
Member<FontFace>&,
Member<FontFace>&,
ExceptionState&) override;
DEFINE_INLINE_VIRTUAL_TRACE() {
visitor->trace(m_fontFaces);
FontFaceSetIterable::IterationSource::trace(visitor);
}
private:
size_t m_index;
HeapVector<Member<FontFace>> m_fontFaces;
};
class FontLoadHistogram {
DISALLOW_NEW();
public:
enum Status { NoWebFonts, HadBlankText, DidNotHaveBlankText, Reported };
FontLoadHistogram() : m_status(NoWebFonts), m_count(0), m_recorded(false) {}
void incrementCount() { m_count++; }
void updateStatus(FontFace*);
void record();
private:
Status m_status;
int m_count;
bool m_recorded;
};
explicit FontFaceSet(Document&);
bool inActiveDocumentContext() const;
void addToLoadingFonts(FontFace*);
void removeFromLoadingFonts(FontFace*);
void fireLoadingEvent();
void fireDoneEventIfPossible();
bool resolveFontStyle(const String&, Font&);
void handlePendingEventsAndPromisesSoon();
void handlePendingEventsAndPromises();
const HeapListHashSet<Member<FontFace>>& cssConnectedFontFaceList() const;
bool isCSSConnectedFontFace(FontFace*) const;
bool shouldSignalReady() const;
using ReadyProperty = ScriptPromiseProperty<Member<FontFaceSet>,
Member<FontFaceSet>,
Member<DOMException>>;
HeapHashSet<Member<FontFace>> m_loadingFonts;
bool m_shouldFireLoadingEvent;
bool m_isLoading;
Member<ReadyProperty> m_ready;
FontFaceArray m_loadedFonts;
FontFaceArray m_failedFonts;
HeapListHashSet<Member<FontFace>> m_nonCSSConnectedFaces;
Member<AsyncMethodRunner<FontFaceSet>> m_asyncRunner;
FontLoadHistogram m_histogram;
};
} // namespace blink
#endif // FontFaceSet_h
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