1/*
2 * Copyright (C) 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "ActiveDOMObject.h"
29#include "CSSFontFaceSet.h"
30#include "DOMPromiseProxy.h"
31#include "EventTarget.h"
32#include "JSDOMPromiseDeferred.h"
33
34namespace WebCore {
35
36class DOMException;
37
38class FontFaceSet final : public RefCounted<FontFaceSet>, private CSSFontFaceSetClient, public EventTargetWithInlineData, private ActiveDOMObject {
39 WTF_MAKE_ISO_ALLOCATED(FontFaceSet);
40public:
41 static Ref<FontFaceSet> create(Document&, const Vector<RefPtr<FontFace>>& initialFaces);
42 static Ref<FontFaceSet> create(Document&, CSSFontFaceSet& backing);
43 virtual ~FontFaceSet();
44
45 bool has(FontFace&) const;
46 size_t size() const;
47 FontFaceSet& add(FontFace&);
48 bool remove(FontFace&);
49 void clear();
50
51 using LoadPromise = DOMPromiseDeferred<IDLSequence<IDLInterface<FontFace>>>;
52 void load(const String& font, const String& text, LoadPromise&&);
53 ExceptionOr<bool> check(const String& font, const String& text);
54
55 enum class LoadStatus { Loading, Loaded };
56 LoadStatus status() const;
57
58 using ReadyPromise = DOMPromiseProxyWithResolveCallback<IDLInterface<FontFaceSet>>;
59 ReadyPromise& ready() { return m_readyPromise; }
60
61 CSSFontFaceSet& backing() { return m_backing; }
62
63 class Iterator {
64 public:
65 explicit Iterator(FontFaceSet&);
66 RefPtr<FontFace> next();
67
68 private:
69 Ref<FontFaceSet> m_target;
70 size_t m_index { 0 }; // FIXME: There needs to be a mechanism to handle when fonts are added or removed from the middle of the FontFaceSet.
71 };
72 Iterator createIterator() { return Iterator(*this); }
73
74 using RefCounted::ref;
75 using RefCounted::deref;
76
77private:
78 struct PendingPromise : RefCounted<PendingPromise> {
79 static Ref<PendingPromise> create(LoadPromise&& promise)
80 {
81 return adoptRef(*new PendingPromise(WTFMove(promise)));
82 }
83 ~PendingPromise();
84
85 private:
86 PendingPromise(LoadPromise&&);
87
88 public:
89 Vector<Ref<FontFace>> faces;
90 LoadPromise promise;
91 bool hasReachedTerminalState { false };
92 };
93
94 FontFaceSet(Document&, const Vector<RefPtr<FontFace>>&);
95 FontFaceSet(Document&, CSSFontFaceSet&);
96
97 // CSSFontFaceSetClient
98 void startedLoading() final;
99 void completedLoading() final;
100 void faceFinished(CSSFontFace&, CSSFontFace::Status) final;
101
102 // ActiveDOMObject
103 const char* activeDOMObjectName() const final { return "FontFaceSet"; }
104 bool canSuspendForDocumentSuspension() const final;
105
106 // EventTarget
107 EventTargetInterface eventTargetInterface() const final { return FontFaceSetEventTargetInterfaceType; }
108 ScriptExecutionContext* scriptExecutionContext() const final { return ActiveDOMObject::scriptExecutionContext(); }
109 void refEventTarget() final { ref(); }
110 void derefEventTarget() final { deref(); }
111
112 // Callback for ReadyPromise.
113 FontFaceSet& readyPromiseResolve();
114
115 Ref<CSSFontFaceSet> m_backing;
116 HashMap<RefPtr<FontFace>, Vector<Ref<PendingPromise>>> m_pendingPromises;
117 ReadyPromise m_readyPromise;
118};
119
120}
121