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 | |
34 | namespace WebCore { |
35 | |
36 | class DOMException; |
37 | |
38 | class FontFaceSet final : public RefCounted<FontFaceSet>, private CSSFontFaceSetClient, public EventTargetWithInlineData, private ActiveDOMObject { |
39 | WTF_MAKE_ISO_ALLOCATED(FontFaceSet); |
40 | public: |
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 | |
77 | private: |
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 | |