Add return statement to fix build break, a=bustage
[mozilla-central.git] / parser / html / nsHtml5SpeculativeLoad.h
blobd6c8c0ba87ee32b0dece15f1573b79f41e1f9291
1 /* ***** BEGIN LICENSE BLOCK *****
2 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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/
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.
14 * The Original Code is HTML Parser C++ Translator code.
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.
21 * Contributor(s):
22 * Henri Sivonen <hsivonen@iki.fi>
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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33 * the provisions above, a recipient may use your version of this file under
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36 * ***** END LICENSE BLOCK ***** */
38 #ifndef nsHtml5SpeculativeLoad_h_
39 #define nsHtml5SpeculativeLoad_h_
41 #include "nsString.h"
43 class nsHtml5TreeOpExecutor;
45 enum eHtml5SpeculativeLoad {
46 #ifdef DEBUG
47 eSpeculativeLoadUninitialized,
48 #endif
49 eSpeculativeLoadBase,
50 eSpeculativeLoadImage,
51 eSpeculativeLoadScript,
52 eSpeculativeLoadStyle,
53 eSpeculativeLoadManifest
56 class nsHtml5SpeculativeLoad {
57 public:
58 nsHtml5SpeculativeLoad();
59 ~nsHtml5SpeculativeLoad();
61 inline void InitBase(const nsAString& aUrl) {
62 NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
63 "Trying to reinitialize a speculative load!");
64 mOpCode = eSpeculativeLoadBase;
65 mUrl.Assign(aUrl);
68 inline void InitImage(const nsAString& aUrl) {
69 NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
70 "Trying to reinitialize a speculative load!");
71 mOpCode = eSpeculativeLoadImage;
72 mUrl.Assign(aUrl);
75 inline void InitScript(const nsAString& aUrl,
76 const nsAString& aCharset,
77 const nsAString& aType) {
78 NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
79 "Trying to reinitialize a speculative load!");
80 mOpCode = eSpeculativeLoadScript;
81 mUrl.Assign(aUrl);
82 mCharset.Assign(aCharset);
83 mType.Assign(aType);
86 inline void InitStyle(const nsAString& aUrl, const nsAString& aCharset) {
87 NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
88 "Trying to reinitialize a speculative load!");
89 mOpCode = eSpeculativeLoadStyle;
90 mUrl.Assign(aUrl);
91 mCharset.Assign(aCharset);
94 /**
95 * "Speculative" manifest loads aren't truly speculative--if a manifest
96 * gets loaded, we are committed to it. There can never be a <script>
97 * before the manifest, so the situation of having to undo a manifest due
98 * to document.write() never arises. The reason why a parser
99 * thread-discovered manifest gets loaded via the speculative load queue
100 * as opposed to tree operation queue is that the manifest must get
101 * processed before any actually speculative loads such as scripts. Thus,
102 * manifests seen by the parser thread have to maintain the queue order
103 * relative to true speculative loads. See bug 541079.
105 inline void InitManifest(const nsAString& aUrl) {
106 NS_PRECONDITION(mOpCode == eSpeculativeLoadUninitialized,
107 "Trying to reinitialize a speculative load!");
108 mOpCode = eSpeculativeLoadManifest;
109 mUrl.Assign(aUrl);
112 void Perform(nsHtml5TreeOpExecutor* aExecutor);
114 private:
115 eHtml5SpeculativeLoad mOpCode;
116 nsString mUrl;
117 nsString mCharset;
118 nsString mType;
121 #endif // nsHtml5SpeculativeLoad_h_