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1 /* | |
2 * Copyright (C) 2011 Google 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 are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promo te products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #ifndef PageSerializer_h | |
32 #define PageSerializer_h | |
33 | |
34 #include "core/CoreExport.h" | |
35 #include "platform/heap/Handle.h" | |
36 #include "platform/weborigin/KURL.h" | |
37 #include "platform/weborigin/KURLHash.h" | |
38 #include "wtf/ListHashSet.h" | |
39 #include "wtf/PassOwnPtr.h" | |
40 #include "wtf/Vector.h" | |
41 #include "wtf/text/WTFString.h" | |
42 | |
43 namespace blink { | |
44 | |
45 class Attribute; | |
46 class CSSRule; | |
47 class CSSStyleSheet; | |
48 class CSSValue; | |
49 class Document; | |
50 class Element; | |
51 class FontResource; | |
52 class ImageResource; | |
53 class LocalFrame; | |
54 class Node; | |
55 class Page; | |
56 class LayoutObject; | |
57 class Resource; | |
58 class SharedBuffer; | |
59 class StylePropertySet; | |
60 | |
61 struct SerializedResource; | |
62 | |
63 // This class is used to serialize frame's contents back to text (typically HTML
). | |
64 // It serializes frame's document and resources such as images and CSS styleshee
ts. | |
65 // TODO(lukasza): Rename this class to FrameSerializer. | |
66 class CORE_EXPORT PageSerializer final { | |
67 STACK_ALLOCATED(); | |
68 public: | |
69 class Delegate { | |
70 public: | |
71 // Controls whether HTML serialization should skip the given attribute. | |
72 virtual bool shouldIgnoreAttribute(const Attribute&) | |
73 { | |
74 return false; | |
75 } | |
76 | |
77 // Method allowing the Delegate control which URLs are written into the | |
78 // generated html document. | |
79 // | |
80 // When URL of the element needs to be rewritten, this method should | |
81 // return true and populate |rewrittenLink| with a desired value of the | |
82 // html attribute value to be used in place of the original link. | |
83 // (i.e. in place of img.src or iframe.src or object.data). | |
84 // | |
85 // If no link rewriting is desired, this method should return false. | |
86 virtual bool rewriteLink(const Element&, String& rewrittenLink) | |
87 { | |
88 return false; | |
89 } | |
90 | |
91 // Tells whether to skip serialization of a subresource with a given URI
. | |
92 // Used to deduplicate resources across multiple frames. | |
93 virtual bool shouldSkipResource(const KURL&) | |
94 { | |
95 return false; | |
96 } | |
97 }; | |
98 | |
99 // Constructs a serializer that will write output to the given vector of | |
100 // SerializedResources and uses the Delegate for controlling some | |
101 // serialization aspects. Callers need to ensure that both arguments stay | |
102 // alive until the PageSerializer gets destroyed. | |
103 PageSerializer(Vector<SerializedResource>&, Delegate&); | |
104 | |
105 // Initiates the serialization of the frame. All serialized content and | |
106 // retrieved resources are added to the Vector passed to the constructor. | |
107 // The first resource in that vector is the frame's serialized content. | |
108 // Subsequent resources are images, css, etc. | |
109 void serializeFrame(const LocalFrame&); | |
110 | |
111 static String markOfTheWebDeclaration(const KURL&); | |
112 | |
113 private: | |
114 // Serializes the stylesheet back to text and adds it to the resources if UR
L is not-empty. | |
115 // It also adds any resources included in that stylesheet (including any imp
orted stylesheets and their own resources). | |
116 void serializeCSSStyleSheet(CSSStyleSheet&, const KURL&); | |
117 | |
118 // Serializes the css rule (including any imported stylesheets), adding refe
renced resources. | |
119 void serializeCSSRule(CSSRule*); | |
120 | |
121 bool shouldAddURL(const KURL&); | |
122 | |
123 void addToResources(Resource *, PassRefPtr<SharedBuffer>, const KURL&); | |
124 void addImageToResources(ImageResource*, const KURL&); | |
125 void addFontToResources(FontResource*); | |
126 | |
127 void retrieveResourcesForProperties(const StylePropertySet*, Document&); | |
128 void retrieveResourcesForCSSValue(CSSValue*, Document&); | |
129 | |
130 Vector<SerializedResource>* m_resources; | |
131 ListHashSet<KURL> m_resourceURLs; | |
132 | |
133 Delegate& m_delegate; | |
134 }; | |
135 | |
136 } // namespace blink | |
137 | |
138 #endif // PageSerializer_h | |
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