LCOV - code coverage report
Current view: directory - layout/generic - nsTextRunTransformations.h (source / functions) Found Hit Coverage
Test: app.info Lines: 21 0 0.0 %
Date: 2012-06-02 Functions: 13 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2                 :  * ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Novell code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Novell Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2006
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   robert@ocallahan.org
      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 NSTEXTRUNTRANSFORMATIONS_H_
      39                 : #define NSTEXTRUNTRANSFORMATIONS_H_
      40                 : 
      41                 : #include "gfxFont.h"
      42                 : 
      43                 : class nsTransformedTextRun;
      44                 : class nsStyleContext;
      45                 : 
      46               0 : class nsTransformingTextRunFactory {
      47                 : public:
      48               0 :   virtual ~nsTransformingTextRunFactory() {}
      49                 : 
      50                 :   // Default 8-bit path just transforms to Unicode and takes that path
      51                 :   nsTransformedTextRun* MakeTextRun(const PRUint8* aString, PRUint32 aLength,
      52                 :                                     const gfxFontGroup::Parameters* aParams,
      53                 :                                     gfxFontGroup* aFontGroup, PRUint32 aFlags,
      54                 :                                     nsStyleContext** aStyles, bool aOwnsFactory = true);
      55                 :   nsTransformedTextRun* MakeTextRun(const PRUnichar* aString, PRUint32 aLength,
      56                 :                                     const gfxFontGroup::Parameters* aParams,
      57                 :                                     gfxFontGroup* aFontGroup, PRUint32 aFlags,
      58                 :                                     nsStyleContext** aStyles, bool aOwnsFactory = true);
      59                 : 
      60                 :   virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext) = 0;
      61                 : };
      62                 : 
      63                 : /**
      64                 :  * Builds textruns that render their text using a font-variant (i.e.,
      65                 :  * smallcaps).
      66                 :  */
      67               0 : class nsFontVariantTextRunFactory : public nsTransformingTextRunFactory {
      68                 : public:
      69                 :   virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext);
      70                 : };
      71                 : 
      72                 : /**
      73                 :  * Builds textruns that transform the text in some way (e.g., capitalize)
      74                 :  * and then render the text using some other textrun implementation.
      75                 :  */
      76               0 : class nsCaseTransformTextRunFactory : public nsTransformingTextRunFactory {
      77                 : public:
      78                 :   // We could add an optimization here so that when there is no inner
      79                 :   // factory, no title-case conversion, and no upper-casing of SZLIG, we override
      80                 :   // MakeTextRun (after making it virtual in the superclass) and have it
      81                 :   // just convert the string to uppercase or lowercase and create the textrun
      82                 :   // via the fontgroup.
      83                 :   
      84                 :   // Takes ownership of aInnerTransformTextRunFactory
      85               0 :   nsCaseTransformTextRunFactory(nsTransformingTextRunFactory* aInnerTransformingTextRunFactory,
      86                 :                                 bool aAllUppercase = false)
      87                 :     : mInnerTransformingTextRunFactory(aInnerTransformingTextRunFactory),
      88               0 :       mAllUppercase(aAllUppercase) {}
      89                 : 
      90                 :   virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext);
      91                 : 
      92                 : protected:
      93                 :   nsAutoPtr<nsTransformingTextRunFactory> mInnerTransformingTextRunFactory;
      94                 :   bool                                    mAllUppercase;
      95                 : };
      96                 : 
      97                 : /**
      98                 :  * So that we can reshape as necessary, we store enough information
      99                 :  * to fully rebuild the textrun contents.
     100                 :  */
     101                 : class nsTransformedTextRun : public gfxTextRun {
     102                 : public:
     103                 :   static nsTransformedTextRun *Create(const gfxTextRunFactory::Parameters* aParams,
     104                 :                                       nsTransformingTextRunFactory* aFactory,
     105                 :                                       gfxFontGroup* aFontGroup,
     106                 :                                       const PRUnichar* aString, PRUint32 aLength,
     107                 :                                       const PRUint32 aFlags, nsStyleContext** aStyles,
     108                 :                                       bool aOwnsFactory);
     109                 : 
     110               0 :   ~nsTransformedTextRun() {
     111               0 :     if (mOwnsFactory) {
     112               0 :       delete mFactory;
     113                 :     }
     114               0 :   }
     115                 :   
     116                 :   void SetCapitalization(PRUint32 aStart, PRUint32 aLength,
     117                 :                          bool* aCapitalization,
     118                 :                          gfxContext* aRefContext);
     119                 :   virtual bool SetPotentialLineBreaks(PRUint32 aStart, PRUint32 aLength,
     120                 :                                         PRUint8* aBreakBefore,
     121                 :                                         gfxContext* aRefContext);
     122                 :   /**
     123                 :    * Called after SetCapitalization and SetPotentialLineBreaks
     124                 :    * are done and before we request any data from the textrun. Also always
     125                 :    * called after a Create.
     126                 :    */
     127               0 :   void FinishSettingProperties(gfxContext* aRefContext)
     128                 :   {
     129               0 :     if (mNeedsRebuild) {
     130               0 :       mNeedsRebuild = false;
     131               0 :       mFactory->RebuildTextRun(this, aRefContext);
     132                 :     }
     133               0 :   }
     134                 : 
     135                 :   // override the gfxTextRun impls to account for additional members here
     136                 :   virtual NS_MUST_OVERRIDE size_t SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf);
     137                 :   virtual NS_MUST_OVERRIDE size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf);
     138                 : 
     139                 :   nsTransformingTextRunFactory       *mFactory;
     140                 :   nsTArray<nsRefPtr<nsStyleContext> > mStyles;
     141                 :   nsTArray<bool>                      mCapitalize;
     142                 :   nsString                            mString;
     143                 :   bool                                mOwnsFactory;
     144                 :   bool                                mNeedsRebuild;
     145                 : 
     146                 : private:
     147               0 :   nsTransformedTextRun(const gfxTextRunFactory::Parameters* aParams,
     148                 :                        nsTransformingTextRunFactory* aFactory,
     149                 :                        gfxFontGroup* aFontGroup,
     150                 :                        const PRUnichar* aString, PRUint32 aLength,
     151                 :                        const PRUint32 aFlags, nsStyleContext** aStyles,
     152                 :                        bool aOwnsFactory)
     153                 :     : gfxTextRun(aParams, aString, aLength, aFontGroup, aFlags),
     154                 :       mFactory(aFactory), mString(aString, aLength),
     155               0 :       mOwnsFactory(aOwnsFactory), mNeedsRebuild(true)
     156                 :   {
     157               0 :     mCharacterGlyphs = reinterpret_cast<CompressedGlyph*>(this + 1);
     158                 : 
     159                 :     PRUint32 i;
     160               0 :     for (i = 0; i < aLength; ++i) {
     161               0 :       mStyles.AppendElement(aStyles[i]);
     162                 :     }
     163               0 :   }
     164                 : };
     165                 : 
     166                 : #endif /*NSTEXTRUNTRANSFORMATIONS_H_*/

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