dali-toolkit/internal/text/markup-processor-strikethrough.cpp

   1 /*
   2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // FILE HEADER
  19 #include <dali-toolkit/internal/text/markup-processor-strikethrough.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/public-api/common/dali-vector.h>
  23
  24 // INTERNAL INCLUDES
  25 #include <dali-toolkit/internal/text/markup-processor-attribute-helper-functions.h>
  26 #include <dali-toolkit/internal/text/markup-processor-helper-functions.h>
  27 #include <dali-toolkit/internal/text/strikethrough-character-run.h>
  28
  29 namespace Dali
  30 {
  31 namespace Toolkit
  32 {
  33 namespace Text
  34 {
  35 namespace
  36 {
  37 const std::string XHTML_COLOR_ATTRIBUTE("color");
  38 const std::string XHTML_HEIGHT_ATTRIBUTE("height");
  39 } // namespace
  40
  41 void ProcessColorAttribute(const Attribute& attribute, StrikethroughCharacterRun& strikethroughRun)
  42
  43 {
  44   ColorStringToVector4(attribute.valueBuffer, attribute.valueLength, strikethroughRun.properties.color);
  45   strikethroughRun.properties.colorDefined = true;
  46 }
  47
  48 void ProcessHeightAttribute(const Attribute& attribute, StrikethroughCharacterRun& strikethroughRun)
  49 {
  50   strikethroughRun.properties.height        = ProcessFloatAttribute(attribute);
  51   strikethroughRun.properties.heightDefined = true;
  52 }
  53
  54 void ProcessStrikethroughTag(const Tag& tag, StrikethroughCharacterRun& strikethroughRun)
  55 {
  56   for(Vector<Attribute>::ConstIterator it    = tag.attributes.Begin(),
  57                                        endIt = tag.attributes.End();
  58       it != endIt;
  59       ++it)
  60   {
  61     const Attribute& attribute(*it);
  62
  63     if(TokenComparison(XHTML_COLOR_ATTRIBUTE, attribute.nameBuffer, attribute.nameLength))
  64     {
  65       ProcessColorAttribute(attribute, strikethroughRun);
  66     }
  67     else if(TokenComparison(XHTML_HEIGHT_ATTRIBUTE, attribute.nameBuffer, attribute.nameLength))
  68     {
  69       ProcessHeightAttribute(attribute, strikethroughRun);
  70     }
  71   }
  72 }
  73
  74 void OverrideNestedStrikethroughCharacterRuns(Vector<StrikethroughCharacterRun>& strikethroughCharacterRuns)
  75 {
  76   // Handle nested tags
  77   // The inner tag inherit the attributes of the outer tag and override them when defined in the inner tag.
  78   // Example:
  79   // <s height='5.0f' color='blue'> outer tag before  <s color='green'> inner tag </s> outer tag after </s>
  80   // "outer tag before" and  "outer tag after" have height = 5.0f and color = 'blue'
  81   // "inner tag" has height = 5.0f and color = 'green'
  82
  83   if(strikethroughCharacterRuns.Count() > 0u)
  84   {
  85     Vector<StrikethroughCharacterRun>::ConstIterator preIt = strikethroughCharacterRuns.Begin();
  86
  87     Vector<StrikethroughCharacterRun>::Iterator      it    = strikethroughCharacterRuns.Begin() + 1;
  88     Vector<StrikethroughCharacterRun>::ConstIterator endIt = strikethroughCharacterRuns.End();
  89
  90     while(it != endIt)
  91     {
  92       const StrikethroughCharacterRun& run                = *it;
  93       const CharacterIndex&            characterIndex     = run.characterRun.characterIndex;
  94       const Length&                    numberOfCharacters = run.characterRun.numberOfCharacters;
  95
  96       const StrikethroughCharacterRun& preRun                = *preIt;
  97       const CharacterIndex&            preCharacterIndex     = preRun.characterRun.characterIndex;
  98       const Length&                    preNumberOfCharacters = preRun.characterRun.numberOfCharacters;
  99
 100       if((preCharacterIndex <= characterIndex) &&
 101          ((characterIndex + numberOfCharacters) <= (preCharacterIndex + preNumberOfCharacters)))
 102       {
 103         it->properties.CopyIfNotDefined(preIt->properties);
 104       }
 105
 106       it++;
 107       preIt++;
 108     }
 109   }
 110 }
 111
 112 } // namespace Text
 113
 114 } // namespace Toolkit
 115
 116 } // namespace Dali