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/markup-tags-and-attributes.h>
  28 #include <dali-toolkit/internal/text/strikethrough-character-run.h>
  29
  30 namespace Dali
  31 {
  32 namespace Toolkit
  33 {
  34 namespace Text
  35 {
  36 void ProcessColorAttribute(const Attribute& attribute, StrikethroughCharacterRun& strikethroughRun)
  37
  38 {
  39   ColorStringToVector4(attribute.valueBuffer, attribute.valueLength, strikethroughRun.properties.color);
  40   strikethroughRun.properties.colorDefined = true;
  41 }
  42
  43 void ProcessHeightAttribute(const Attribute& attribute, StrikethroughCharacterRun& strikethroughRun)
  44 {
  45   strikethroughRun.properties.height        = ProcessFloatAttribute(attribute);
  46   strikethroughRun.properties.heightDefined = true;
  47 }
  48
  49 void ProcessStrikethroughTag(const Tag& tag, StrikethroughCharacterRun& strikethroughRun)
  50 {
  51   for(Vector<Attribute>::ConstIterator it    = tag.attributes.Begin(),
  52                                        endIt = tag.attributes.End();
  53       it != endIt;
  54       ++it)
  55   {
  56     const Attribute& attribute(*it);
  57
  58     if(TokenComparison(MARKUP::STRIKETHROUGH_ATTRIBUTES::COLOR, attribute.nameBuffer, attribute.nameLength))
  59     {
  60       ProcessColorAttribute(attribute, strikethroughRun);
  61     }
  62     else if(TokenComparison(MARKUP::STRIKETHROUGH_ATTRIBUTES::HEIGHT, attribute.nameBuffer, attribute.nameLength))
  63     {
  64       ProcessHeightAttribute(attribute, strikethroughRun);
  65     }
  66   }
  67 }
  68
  69 void OverrideNestedStrikethroughCharacterRuns(Vector<StrikethroughCharacterRun>& strikethroughCharacterRuns)
  70 {
  71   // Handle nested tags
  72   // The inner tag inherit the attributes of the outer tag and override them when defined in the inner tag.
  73   // Example:
  74   // <s height='5.0f' color='blue'> outer tag before  <s color='green'> inner tag </s> outer tag after </s>
  75   // "outer tag before" and  "outer tag after" have height = 5.0f and color = 'blue'
  76   // "inner tag" has height = 5.0f and color = 'green'
  77
  78   if(strikethroughCharacterRuns.Count() > 0u)
  79   {
  80     Vector<StrikethroughCharacterRun>::ConstIterator preIt = strikethroughCharacterRuns.Begin();
  81
  82     Vector<StrikethroughCharacterRun>::Iterator      it    = strikethroughCharacterRuns.Begin() + 1;
  83     Vector<StrikethroughCharacterRun>::ConstIterator endIt = strikethroughCharacterRuns.End();
  84
  85     while(it != endIt)
  86     {
  87       const StrikethroughCharacterRun& run                = *it;
  88       const CharacterIndex&            characterIndex     = run.characterRun.characterIndex;
  89       const Length&                    numberOfCharacters = run.characterRun.numberOfCharacters;
  90
  91       const StrikethroughCharacterRun& preRun                = *preIt;
  92       const CharacterIndex&            preCharacterIndex     = preRun.characterRun.characterIndex;
  93       const Length&                    preNumberOfCharacters = preRun.characterRun.numberOfCharacters;
  94
  95       if((preCharacterIndex <= characterIndex) &&
  96          ((characterIndex + numberOfCharacters) <= (preCharacterIndex + preNumberOfCharacters)))
  97       {
  98         it->properties.CopyIfNotDefined(preIt->properties);
  99       }
 100
 101       it++;
 102       preIt++;
 103     }
 104   }
 105 }
 106
 107 } // namespace Text
 108
 109 } // namespace Toolkit
 110
 111 } // namespace Dali