X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=dali-toolkit%2Finternal%2Ftext%2Flogical-model-impl.cpp;h=2faca97dea759cee1646eda91adb1f3435035111;hb=a7646628bf0d87a7f9e02d8f4db52dea881579c7;hp=807f7fb65df7ee43c1452110275a0004790de39c;hpb=10d2080e1d25b75347daa2f8c2dcee494fbcb175;p=platform%2Fcore%2Fuifw%2Fdali-toolkit.git

diff --git a/dali-toolkit/internal/text/logical-model-impl.cpp b/dali-toolkit/internal/text/logical-model-impl.cpp
index 807f7fb..2faca97 100644
--- a/dali-toolkit/internal/text/logical-model-impl.cpp
+++ b/dali-toolkit/internal/text/logical-model-impl.cpp
@@ -391,15 +391,42 @@ void ReplaceBidirectionalInfo( CharacterIndex characterIndex,
 {
 }
 
+void LogicalModel::SetCharacterDirections( const CharacterDirection* const directions,
+                                           Length numberOfCharacters )
+{
+  if( 0u == numberOfCharacters )
+  {
+    mCharacterDirections.Clear();
+  }
+  else
+  {
+    mCharacterDirections.Resize( numberOfCharacters );
+    memcpy( mCharacterDirections.Begin(), directions, numberOfCharacters * sizeof( CharacterDirection ) );
+  }
+}
+
 void LogicalModel::GetCharacterDirections( CharacterDirection* directions,
                                            CharacterIndex characterIndex,
                                            Length numberOfCharacters ) const
 {
+  if( 0u == mCharacterDirections.Count() )
+  {
+    // Nothing to retrieve if the model has no right to left characters.
+    return;
+  }
+
+  memcpy( directions, mCharacterDirections.Begin() + characterIndex, numberOfCharacters * sizeof( CharacterDirection ) );
 }
 
 CharacterDirection LogicalModel::GetCharacterDirection( CharacterIndex characterIndex ) const
 {
-  return false;
+  if( characterIndex >= mCharacterDirections.Count() )
+  {
+    // The model has no right to left characters, so the vector of directions is void.
+    return false;
+  }
+
+  return *( mCharacterDirections.Begin() + characterIndex );
 }
 
 void LogicalModel::SetVisualToLogicalMap( const BidirectionalLineInfoRun* const bidirectionalInfo,
@@ -409,6 +436,7 @@ void LogicalModel::SetVisualToLogicalMap( const BidirectionalLineInfoRun* const
   {
     mVisualToLogicalMap.Clear();
     mLogicalToVisualMap.Clear();
+    mVisualToLogicalCursorMap.Clear();
   }
   else
   {
@@ -416,9 +444,14 @@ void LogicalModel::SetVisualToLogicalMap( const BidirectionalLineInfoRun* const
     mVisualToLogicalMap.Resize( numberOfCharacters );
     mLogicalToVisualMap.Resize( numberOfCharacters );
 
+    const Length numberOfCharactersPlus = numberOfCharacters + 1u;
+    mVisualToLogicalCursorMap.Resize( numberOfCharactersPlus );
+
     CharacterIndex* modelVisualToLogicalMapBuffer = mVisualToLogicalMap.Begin();
     CharacterIndex* modelLogicalToVisualMapBuffer = mLogicalToVisualMap.Begin();
 
+    CharacterIndex* modelVisualToLogicalCursorMap = mVisualToLogicalCursorMap.Begin();
+
     CharacterIndex lastIndex = 0u;
     for( unsigned int bidiIndex = 0u; bidiIndex < numberOfRuns; ++bidiIndex )
     {
@@ -453,6 +486,114 @@ void LogicalModel::SetVisualToLogicalMap( const BidirectionalLineInfoRun* const
     {
       *( modelLogicalToVisualMapBuffer + *( modelVisualToLogicalMapBuffer + index ) ) = index;
     }
+
+    // Sets the visual to logical conversion map for cursor positions.
+
+    const Length numberOfBidirectionalParagraphs = mBidirectionalParagraphInfo.Count();
+    BidirectionalParagraphInfoRun* bidirectionalParagraphInfoBuffer = mBidirectionalParagraphInfo.Begin();
+    BidirectionalParagraphInfoRun* bidirectionalParagraph = bidirectionalParagraphInfoBuffer;
+
+    const CharacterDirection* const modelCharacterDirections = mCharacterDirections.Begin();
+
+    Length bidirectionalParagraphIndex = 0u;
+    bool isRightToLeftParagraph = false;
+    for( CharacterIndex index = 0u; index < numberOfCharactersPlus; ++index )
+    {
+      if( bidirectionalParagraph &&
+          ( bidirectionalParagraph->characterRun.characterIndex == index ) )
+      {
+        isRightToLeftParagraph = *( modelCharacterDirections + index );
+      }
+
+      if( 0u == index )
+      {
+        if( isRightToLeftParagraph )
+        {
+          *( modelVisualToLogicalCursorMap + index ) = numberOfCharacters;
+        }
+        else // else logical position is zero.
+        {
+          *( modelVisualToLogicalCursorMap + index ) = 0u;
+        }
+      }
+      else if( numberOfCharacters == index )
+      {
+        if( isRightToLeftParagraph )
+        {
+          *( modelVisualToLogicalCursorMap + index ) = 0u;
+        }
+        else // else logical position is the number of characters.
+        {
+          *( modelVisualToLogicalCursorMap + index ) = numberOfCharacters;
+        }
+      }
+      else
+      {
+        // Get the character indexed by  index - 1 and index
+        // and calculate the logical position according the directions of
+        // both characters and the direction of the paragraph.
+
+        const CharacterIndex previousIndex = index - 1u;
+        const CharacterIndex logicalPosition0 = *( modelVisualToLogicalMapBuffer + previousIndex );
+        const CharacterIndex logicalPosition1 = *( modelVisualToLogicalMapBuffer + index );
+
+        const CharacterDirection direction0 = *( modelCharacterDirections + logicalPosition0 );
+        const CharacterDirection direction1 = *( modelCharacterDirections + logicalPosition1 );
+
+        if( direction0 == direction1 )
+        {
+          // Both glyphs have the same direction.
+          if( direction0 )
+          {
+            *( modelVisualToLogicalCursorMap + index ) = logicalPosition0;
+          }
+          else
+          {
+            *( modelVisualToLogicalCursorMap + index ) = logicalPosition1;
+          }
+        }
+        else
+        {
+          if( isRightToLeftParagraph )
+          {
+            if( direction1 )
+            {
+              *( modelVisualToLogicalCursorMap + index ) = logicalPosition1 + 1u;
+            }
+            else
+            {
+              *( modelVisualToLogicalCursorMap + index ) = logicalPosition0;
+            }
+          }
+          else
+          {
+            if( direction0 )
+            {
+              *( modelVisualToLogicalCursorMap + index ) = logicalPosition1;
+            }
+            else
+            {
+              *( modelVisualToLogicalCursorMap + index ) = logicalPosition0 + 1u;
+            }
+          }
+        }
+      }
+
+      if( bidirectionalParagraph &&
+          ( bidirectionalParagraph->characterRun.characterIndex + bidirectionalParagraph->characterRun.numberOfCharacters == index ) )
+      {
+        isRightToLeftParagraph = false;
+        ++bidirectionalParagraphIndex;
+        if( bidirectionalParagraphIndex < numberOfBidirectionalParagraphs )
+        {
+          bidirectionalParagraph = bidirectionalParagraphInfoBuffer + bidirectionalParagraphIndex;
+        }
+        else
+        {
+          bidirectionalParagraph = NULL;
+        }
+      }
+    }
   }
 }