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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_FONT_FACE_SET_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_FONT_FACE_SET_H_
#include "base/macros.h"
#include "third_party/blink/public/platform/task_type.h"
#include "third_party/blink/renderer/bindings/core/v8/iterable.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/core/css/font_face.h"
#include "third_party/blink/renderer/core/dom/events/event_listener.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/fonts/font_selector.h"
// Mac OS X 10.6 SDK defines check() macro that interferes with our check()
// method
#ifdef check
#undef check
#endif
namespace blink {
class FontFaceCache;
using FontFaceSetIterable = SetlikeIterable<Member<FontFace>>;
class CORE_EXPORT FontFaceSet : public EventTargetWithInlineData,
public ExecutionContextClient,
public FontFaceSetIterable,
public FontFace::LoadFontCallback {
DEFINE_WRAPPERTYPEINFO();
public:
FontFaceSet(ExecutionContext& context)
: ExecutionContextClient(&context),
ready_(MakeGarbageCollected<ReadyProperty>(GetExecutionContext())) {}
~FontFaceSet() override = default;
DEFINE_ATTRIBUTE_EVENT_LISTENER(loading, kLoading)
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingdone, kLoadingdone)
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingerror, kLoadingerror)
bool check(const String& font, const String& text, ExceptionState&);
ScriptPromise load(ScriptState*, const String& font, const String& text);
virtual ScriptPromise ready(ScriptState*) = 0;
ExecutionContext* GetExecutionContext() const override {
return ExecutionContextClient::GetExecutionContext();
}
const AtomicString& InterfaceName() const override {
return event_target_names::kFontFaceSet;
}
FontFaceSet* addForBinding(ScriptState*, FontFace*, ExceptionState&);
void clearForBinding(ScriptState*, ExceptionState&);
bool deleteForBinding(ScriptState*, FontFace*, ExceptionState&);
bool hasForBinding(ScriptState*, FontFace*, ExceptionState&) const;
void AddFontFacesToFontFaceCache(FontFaceCache*);
wtf_size_t size() const;
virtual AtomicString status() const = 0;
void Trace(Visitor*) override;
protected:
static const int kDefaultFontSize;
static const char kDefaultFontFamily[];
virtual bool ResolveFontStyle(const String&, Font&) = 0;
virtual bool InActiveContext() const = 0;
virtual FontSelector* GetFontSelector() const = 0;
virtual const HeapLinkedHashSet<Member<FontFace>>& CSSConnectedFontFaceList()
const = 0;
bool IsCSSConnectedFontFace(FontFace* font_face) const {
return CSSConnectedFontFaceList().Contains(font_face);
}
virtual void FireDoneEventIfPossible() = 0;
void AddToLoadingFonts(FontFace*);
void RemoveFromLoadingFonts(FontFace*);
void HandlePendingEventsAndPromisesSoon();
bool ShouldSignalReady() const;
void FireDoneEvent();
using ReadyProperty = ScriptPromiseProperty<Member<FontFaceSet>,
Member<DOMException>>;
bool is_loading_ = false;
bool should_fire_loading_event_ = false;
bool pending_task_queued_ = false;
HeapLinkedHashSet<Member<FontFace>> non_css_connected_faces_;
HeapHashSet<Member<FontFace>> loading_fonts_;
FontFaceArray loaded_fonts_;
FontFaceArray failed_fonts_;
Member<ReadyProperty> ready_;
class IterationSource final : public FontFaceSetIterable::IterationSource {
public:
explicit IterationSource(const HeapVector<Member<FontFace>>& font_faces)
: index_(0), font_faces_(font_faces) {}
bool Next(ScriptState*,
Member<FontFace>&,
Member<FontFace>&,
ExceptionState&) override;
void Trace(Visitor* visitor) override {
visitor->Trace(font_faces_);
FontFaceSetIterable::IterationSource::Trace(visitor);
}
private:
wtf_size_t index_;
HeapVector<Member<FontFace>> font_faces_;
};
class LoadFontPromiseResolver final
: public GarbageCollected<LoadFontPromiseResolver>,
public FontFace::LoadFontCallback {
USING_GARBAGE_COLLECTED_MIXIN(LoadFontPromiseResolver);
public:
LoadFontPromiseResolver(FontFaceArray faces, ScriptState* script_state)
: num_loading_(faces.size()),
error_occured_(false),
resolver_(MakeGarbageCollected<ScriptPromiseResolver>(script_state)) {
font_faces_.swap(faces);
}
void LoadFonts();
ScriptPromise Promise() { return resolver_->Promise(); }
void NotifyLoaded(FontFace*) override;
void NotifyError(FontFace*) override;
void Trace(Visitor*) override;
private:
HeapVector<Member<FontFace>> font_faces_;
int num_loading_;
bool error_occured_;
Member<ScriptPromiseResolver> resolver_;
};
private:
FontFaceSetIterable::IterationSource* StartIteration(
ScriptState*,
ExceptionState&) override;
void HandlePendingEventsAndPromises();
void FireLoadingEvent();
DISALLOW_COPY_AND_ASSIGN(FontFaceSet);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_FONT_FACE_SET_H_
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