LCOV - code coverage report
Current view: directory - parser/html - nsHtml5SpeculativeLoad.h (source / functions) Found Hit Coverage
Test: app.info Lines: 36 0 0.0 %
Date: 2012-06-02 Functions: 6 0 0.0 %

       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
      28                 :  * of those above. If you wish to allow use of your version of this file only
      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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