1 : /* ***** BEGIN LICENSE BLOCK *****
2 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3 : *
4 : * The contents of this file are subject to the Mozilla Public License Version
5 : * 1.1 (the "License"); you may not use this file except in compliance with
6 : * the License. You may obtain a copy of the License at
7 : * http://www.mozilla.org/MPL/
8 : *
9 : * Software distributed under the License is distributed on an "AS IS" basis,
10 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11 : * for the specific language governing rights and limitations under the
12 : * License.
13 : *
14 : * The Original Code is HTML Parser C++ Translator code.
15 : *
16 : * The Initial Developer of the Original Code is
17 : * Mozilla Foundation.
18 : * Portions created by the Initial Developer are Copyright (C) 2010
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * Henri Sivonen <hsivonen@iki.fi>
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef nsHtml5SpeculativeLoad_h_
39 : #define nsHtml5SpeculativeLoad_h_
40 :
41 : #include "nsString.h"
42 :
43 : class nsHtml5TreeOpExecutor;
44 :
45 : enum eHtml5SpeculativeLoad {
46 : #ifdef DEBUG
47 : eSpeculativeLoadUninitialized,
48 : #endif
49 : eSpeculativeLoadBase,
50 : eSpeculativeLoadImage,
51 : eSpeculativeLoadScript,
52 : eSpeculativeLoadStyle,
53 : eSpeculativeLoadManifest,
54 : eSpeculativeLoadSetDocumentCharset
55 : };
56 :
57 : class nsHtml5SpeculativeLoad {
58 : public:
59 : nsHtml5SpeculativeLoad();
60 : ~nsHtml5SpeculativeLoad();
61 :
62 0 : inline void InitBase(const nsAString& aUrl) {
63 0 : NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
64 : "Trying to reinitialize a speculative load!");
65 0 : mOpCode = eSpeculativeLoadBase;
66 0 : mUrl.Assign(aUrl);
67 0 : }
68 :
69 0 : inline void InitImage(const nsAString& aUrl,
70 : const nsAString& aCrossOrigin) {
71 0 : NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
72 : "Trying to reinitialize a speculative load!");
73 0 : mOpCode = eSpeculativeLoadImage;
74 0 : mUrl.Assign(aUrl);
75 0 : mCrossOrigin.Assign(aCrossOrigin);
76 0 : }
77 :
78 0 : inline void InitScript(const nsAString& aUrl,
79 : const nsAString& aCharset,
80 : const nsAString& aType,
81 : const nsAString& aCrossOrigin) {
82 0 : NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
83 : "Trying to reinitialize a speculative load!");
84 0 : mOpCode = eSpeculativeLoadScript;
85 0 : mUrl.Assign(aUrl);
86 0 : mCharset.Assign(aCharset);
87 0 : mTypeOrCharsetSource.Assign(aType);
88 0 : mCrossOrigin.Assign(aCrossOrigin);
89 0 : }
90 :
91 0 : inline void InitStyle(const nsAString& aUrl, const nsAString& aCharset) {
92 0 : NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
93 : "Trying to reinitialize a speculative load!");
94 0 : mOpCode = eSpeculativeLoadStyle;
95 0 : mUrl.Assign(aUrl);
96 0 : mCharset.Assign(aCharset);
97 0 : }
98 :
99 : /**
100 : * "Speculative" manifest loads aren't truly speculative--if a manifest
101 : * gets loaded, we are committed to it. There can never be a <script>
102 : * before the manifest, so the situation of having to undo a manifest due
103 : * to document.write() never arises. The reason why a parser
104 : * thread-discovered manifest gets loaded via the speculative load queue
105 : * as opposed to tree operation queue is that the manifest must get
106 : * processed before any actual speculative loads such as scripts. Thus,
107 : * manifests seen by the parser thread have to maintain the queue order
108 : * relative to true speculative loads. See bug 541079.
109 : */
110 0 : inline void InitManifest(const nsAString& aUrl) {
111 0 : NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
112 : "Trying to reinitialize a speculative load!");
113 0 : mOpCode = eSpeculativeLoadManifest;
114 0 : mUrl.Assign(aUrl);
115 0 : }
116 :
117 : /**
118 : * "Speculative" charset setting isn't truly speculative. If the charset
119 : * is set via this operation, we are committed to it unless chardet or
120 : * a late meta cause a reload. The reason why a parser
121 : * thread-discovered charset gets communicated via the speculative load
122 : * queue as opposed to tree operation queue is that the charset change
123 : * must get processed before any actual speculative loads such as style
124 : * sheets. Thus, encoding decisions by the parser thread have to maintain
125 : * the queue order relative to true speculative loads. See bug 675499.
126 : */
127 0 : inline void InitSetDocumentCharset(nsACString& aCharset,
128 : PRInt32 aCharsetSource) {
129 0 : NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
130 : "Trying to reinitialize a speculative load!");
131 0 : mOpCode = eSpeculativeLoadSetDocumentCharset;
132 0 : CopyUTF8toUTF16(aCharset, mCharset);
133 0 : mTypeOrCharsetSource.Assign((PRUnichar)aCharsetSource);
134 0 : }
135 :
136 : void Perform(nsHtml5TreeOpExecutor* aExecutor);
137 :
138 : private:
139 : eHtml5SpeculativeLoad mOpCode;
140 : nsString mUrl;
141 : /**
142 : * If mOpCode is eSpeculativeLoadStyle or eSpeculativeLoadScript
143 : * then this is the value of the "charset" attribute. For
144 : * eSpeculativeLoadSetDocumentCharset it is the charset that the
145 : * document's charset is being set to. Otherwise it's empty.
146 : */
147 : nsString mCharset;
148 : /**
149 : * If mOpCode is eSpeculativeLoadSetDocumentCharset, this is a
150 : * one-character string whose single character's code point is to be
151 : * interpreted as a charset source integer. Otherwise, it is empty or
152 : * the value of the type attribute.
153 : */
154 : nsString mTypeOrCharsetSource;
155 : /**
156 : * If mOpCode is eSpeculativeLoadImage or eSpeculativeLoadScript,
157 : * this is the value of the "crossorigin" attribute. If the
158 : * attribute is not set, this will be a void string.
159 : */
160 : nsString mCrossOrigin;
161 : };
162 :
163 : #endif // nsHtml5SpeculativeLoad_h_
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