Make cursor invisible when exceeds the boundaries of the Text Control.

[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / text / text-controller-impl.cpp

diff --git a/dali-toolkit/internal/text/text-controller-impl.cpp b/dali-toolkit/internal/text/text-controller-impl.cpp
index 4f90795..1b68f13 100644 (file)
--- a/dali-toolkit/internal/text/text-controller-impl.cpp
+++ b/dali-toolkit/internal/text/text-controller-impl.cpp
@@ -109,7 +109,8 @@ EventData::EventData( DecoratorPtr decorator )
   mSelectionEnabled( true ),
   mHorizontalScrollingEnabled( true ),
   mVerticalScrollingEnabled( false ),
-  mUpdateCursorPosition( false )
+  mUpdateCursorPosition( false ),
+  mScrollAfterUpdateCursorPosition( false )
 {}
 
 EventData::~EventData()
@@ -170,7 +171,16 @@ bool Controller::Impl::ProcessInputEvents()
   // The cursor must also be repositioned after inserts into the model
   if( mEventData->mUpdateCursorPosition )
   {
+    // Updates the cursor position and scrolls the text to make it visible.
+
     UpdateCursorPosition();
+
+    if( mEventData->mScrollAfterUpdateCursorPosition )
+    {
+      ScrollToMakeCursorVisible();
+      mEventData->mScrollAfterUpdateCursorPosition = false;
+    }
+
     mEventData->mUpdateCursorPosition = false;
   }
 
@@ -230,7 +240,8 @@ void Controller::Impl::OnCursorKeyEvent( const Event& event )
     // TODO
   }
 
-  UpdateCursorPosition();
+  mEventData->mUpdateCursorPosition = true;
+  mEventData->mScrollAfterUpdateCursorPosition = true;
 }
 
 void Controller::Impl::HandleCursorKey( int keyCode )
@@ -257,13 +268,14 @@ void Controller::Impl::OnTapEvent( const Event& event )
   {
     ChangeState( EventData::EDITING );
 
-    const float xPosition = event.p2.mFloat - mAlignmentOffset.x;
-    const float yPosition = event.p3.mFloat - mAlignmentOffset.y;
+    const float xPosition = event.p2.mFloat - mEventData->mScrollPosition.x - mAlignmentOffset.x;
+    const float yPosition = event.p3.mFloat - mEventData->mScrollPosition.y - mAlignmentOffset.y;
 
     mEventData->mPrimaryCursorPosition = GetClosestCursorIndex( xPosition,
                                                                 yPosition );
 
-    UpdateCursorPosition();
+    mEventData->mUpdateCursorPosition = true;
+    mEventData->mScrollAfterUpdateCursorPosition = true;
   }
   else if( mEventData->mSelectionEnabled &&
            ( 2u == tapCount ) )
@@ -288,25 +300,14 @@ void Controller::Impl::OnPanEvent( const Event& event )
       Gesture::Continuing == state )
   {
     const Vector2& actualSize = mVisualModel->GetActualSize();
+    const Vector2 currentScroll = mEventData->mScrollPosition;
 
     if( mEventData->mHorizontalScrollingEnabled )
     {
       const float displacementX = event.p2.mFloat;
       mEventData->mScrollPosition.x += displacementX;
 
-      // Clamp between -space & 0 (and the text alignment).
-      if( actualSize.width > mControlSize.width )
-      {
-        const float space = ( actualSize.width - mControlSize.width ) + mAlignmentOffset.x;
-        mEventData->mScrollPosition.x = ( mEventData->mScrollPosition.x < -space ) ? -space : mEventData->mScrollPosition.x;
-        mEventData->mScrollPosition.x = ( mEventData->mScrollPosition.x > -mAlignmentOffset.x ) ? -mAlignmentOffset.x : mEventData->mScrollPosition.x;
-
-        mEventData->mDecoratorUpdated = true;
-      }
-      else
-      {
-        mEventData->mScrollPosition.x = 0.f;
-      }
+      ClampHorizontalScroll( actualSize );
     }
 
     if( mEventData->mVerticalScrollingEnabled )
@@ -314,19 +315,12 @@ void Controller::Impl::OnPanEvent( const Event& event )
       const float displacementY = event.p3.mFloat;
       mEventData->mScrollPosition.y += displacementY;
 
-      // Clamp between -space & 0 (and the text alignment).
-      if( actualSize.height > mControlSize.height )
-      {
-        const float space = ( actualSize.height - mControlSize.height ) + mAlignmentOffset.y;
-        mEventData->mScrollPosition.y = ( mEventData->mScrollPosition.y < -space ) ? -space : mEventData->mScrollPosition.y;
-        mEventData->mScrollPosition.y = ( mEventData->mScrollPosition.y > -mAlignmentOffset.y ) ? -mAlignmentOffset.y : mEventData->mScrollPosition.y;
+      ClampVerticalScroll( actualSize );
+    }
 
-        mEventData->mDecoratorUpdated = true;
-      }
-      else
-      {
-        mEventData->mScrollPosition.y = 0.f;
-      }
+    if( mEventData->mDecorator )
+    {
+      mEventData->mDecorator->UpdatePositions( mEventData->mScrollPosition - currentScroll );
     }
   }
 }
@@ -343,22 +337,27 @@ void Controller::Impl::OnGrabHandleEvent( const Event& event )
 
   if( GRAB_HANDLE_PRESSED == state )
   {
-    float xPosition = event.p2.mFloat + mEventData->mScrollPosition.x;
-    float yPosition = event.p3.mFloat + mEventData->mScrollPosition.y;
-
-    mEventData->mPrimaryCursorPosition = GetClosestCursorIndex( xPosition,
-                                                                yPosition );
-
-    UpdateCursorPosition();
+    // The event.p2 and event.p3 are in decorator coords. Need to transforms to text coords.
+    const float xPosition = event.p2.mFloat - mEventData->mScrollPosition.x - mAlignmentOffset.x;
+    const float yPosition = event.p3.mFloat - mEventData->mScrollPosition.y - mAlignmentOffset.y;
 
     //mDecorator->HidePopup();
     ChangeState ( EventData::EDITING );
+
+    const CharacterIndex newCursorPosition = GetClosestCursorIndex( xPosition, yPosition );
+
+    if( newCursorPosition != mEventData->mPrimaryCursorPosition )
+    {
+      mEventData->mPrimaryCursorPosition = newCursorPosition;
+      mEventData->mUpdateCursorPosition = true;
+    }
   }
   else if( mEventData->mGrabHandlePopupEnabled &&
            ( GRAB_HANDLE_RELEASED == state ) )
   {
     //mDecorator->ShowPopup();
     ChangeState ( EventData::EDITING_WITH_POPUP );
+    mEventData->mUpdateCursorPosition = true;
     mEventData->mDecoratorUpdated = true;
   }
 }
@@ -384,18 +383,18 @@ void Controller::Impl::RepositionSelectionHandles( float visualX, float visualY
 
   if( count )
   {
-    float primaryX   = positions[0].x;
-    float secondaryX = positions[count-1].x + glyphs[count-1].width;
+    float primaryX   = positions[0].x + mEventData->mScrollPosition.x;
+    float secondaryX = positions[count-1].x + glyphs[count-1].width + mEventData->mScrollPosition.x;
 
     // TODO - multi-line selection
     const Vector<LineRun>& lines = mVisualModel->mLines;
     float height = lines.Count() ? lines[0].ascender + -lines[0].descender : 0.0f;
 
-    mEventData->mDecorator->SetPosition( PRIMARY_SELECTION_HANDLE,   primaryX,   0.0f, height );
-    mEventData->mDecorator->SetPosition( SECONDARY_SELECTION_HANDLE, secondaryX, 0.0f, height );
+    mEventData->mDecorator->SetPosition( PRIMARY_SELECTION_HANDLE,     primaryX, mEventData->mScrollPosition.y, height );
+    mEventData->mDecorator->SetPosition( SECONDARY_SELECTION_HANDLE, secondaryX, mEventData->mScrollPosition.y, height );
 
     mEventData->mDecorator->ClearHighlights();
-    mEventData->mDecorator->AddHighlight( primaryX, 0.0f, secondaryX, height );
+    mEventData->mDecorator->AddHighlight( primaryX, mEventData->mScrollPosition.y, secondaryX, height + mEventData->mScrollPosition.y );
   }
 }
 
@@ -507,10 +506,6 @@ CharacterIndex Controller::Impl::GetClosestCursorIndex( float visualX,
     return logicalIndex;
   }
 
-  // Transform to visual model coords
-  visualX -= mEventData->mScrollPosition.x;
-  visualY -= mEventData->mScrollPosition.y;
-
   // Find which line is closest
   const LineIndex lineIndex = GetClosestLine( visualY );
   const LineRun& line = mVisualModel->mLines[lineIndex];
@@ -826,8 +821,8 @@ void Controller::Impl::UpdateCursorPosition()
                      cursorInfo );
 
   mEventData->mDecorator->SetPosition( PRIMARY_CURSOR,
-                                       cursorInfo.primaryPosition.x,
-                                       cursorInfo.primaryPosition.y,
+                                       cursorInfo.primaryPosition.x + mEventData->mScrollPosition.x + mAlignmentOffset.x,
+                                       cursorInfo.primaryPosition.y + mEventData->mScrollPosition.y + mAlignmentOffset.y,
                                        cursorInfo.primaryCursorHeight,
                                        cursorInfo.lineHeight );
 
@@ -835,8 +830,8 @@ void Controller::Impl::UpdateCursorPosition()
   {
     mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_BOTH );
     mEventData->mDecorator->SetPosition( SECONDARY_CURSOR,
-                                         cursorInfo.secondaryPosition.x,
-                                         cursorInfo.secondaryPosition.y,
+                                         cursorInfo.secondaryPosition.x + mEventData->mScrollPosition.x + mAlignmentOffset.x,
+                                         cursorInfo.secondaryPosition.y + mEventData->mScrollPosition.y + mAlignmentOffset.y,
                                          cursorInfo.secondaryCursorHeight,
                                          cursorInfo.lineHeight );
   }
@@ -849,6 +844,73 @@ void Controller::Impl::UpdateCursorPosition()
   mEventData->mDecoratorUpdated = true;
 }
 
+void Controller::Impl::ClampHorizontalScroll( const Vector2& actualSize )
+{
+  // Clamp between -space & 0 (and the text alignment).
+  if( actualSize.width > mControlSize.width )
+  {
+    const float space = ( actualSize.width - mControlSize.width ) + mAlignmentOffset.x;
+    mEventData->mScrollPosition.x = ( mEventData->mScrollPosition.x < -space ) ? -space : mEventData->mScrollPosition.x;
+    mEventData->mScrollPosition.x = ( mEventData->mScrollPosition.x > -mAlignmentOffset.x ) ? -mAlignmentOffset.x : mEventData->mScrollPosition.x;
+
+    mEventData->mDecoratorUpdated = true;
+  }
+  else
+  {
+    mEventData->mScrollPosition.x = 0.f;
+  }
+}
+
+void Controller::Impl::ClampVerticalScroll( const Vector2& actualSize )
+{
+  // Clamp between -space & 0 (and the text alignment).
+  if( actualSize.height > mControlSize.height )
+  {
+    const float space = ( actualSize.height - mControlSize.height ) + mAlignmentOffset.y;
+    mEventData->mScrollPosition.y = ( mEventData->mScrollPosition.y < -space ) ? -space : mEventData->mScrollPosition.y;
+    mEventData->mScrollPosition.y = ( mEventData->mScrollPosition.y > -mAlignmentOffset.y ) ? -mAlignmentOffset.y : mEventData->mScrollPosition.y;
+
+    mEventData->mDecoratorUpdated = true;
+  }
+  else
+  {
+    mEventData->mScrollPosition.y = 0.f;
+  }
+}
+
+void Controller::Impl::ScrollToMakeCursorVisible()
+{
+  if( NULL == mEventData )
+  {
+    // Nothing to do if there is no text input.
+    return;
+  }
+
+  const Vector2& primaryCursorPosition = mEventData->mDecorator->GetPosition( PRIMARY_CURSOR );
+
+  Vector2 offset;
+  bool updateDecorator = false;
+  if( primaryCursorPosition.x < 0.f )
+  {
+    offset.x = -primaryCursorPosition.x;
+    mEventData->mScrollPosition.x += offset.x;
+    updateDecorator = true;
+  }
+  else if( primaryCursorPosition.x > mControlSize.width )
+  {
+    offset.x = mControlSize.width - primaryCursorPosition.x;
+    mEventData->mScrollPosition.x += offset.x;
+    updateDecorator = true;
+  }
+
+  if( updateDecorator && mEventData->mDecorator )
+  {
+    mEventData->mDecorator->UpdatePositions( offset );
+  }
+
+  // TODO : calculate the Y scroll.
+}
+
 void Controller::Impl::RequestRelayout()
 {
   mControlInterface.RequestTextRelayout();