Relayout again for LTR / RTL order when layout direction is changed.
[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / controls / text-controls / text-label-impl.cpp
old mode 100644 (file)
new mode 100755 (executable)
index cd96e00..473730d
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@
 
 // EXTERNAL INCLUDES
 #include <dali/public-api/object/type-registry-helper.h>
+#include <dali/public-api/common/stage.h>
 #include <dali/devel-api/object/property-helper-devel.h>
 #include <dali/devel-api/adaptor-framework/image-loading.h>
 #include <dali/integration-api/debug.h>
@@ -60,6 +61,19 @@ namespace Internal
 namespace
 {
   const unsigned int DEFAULT_RENDERING_BACKEND = Dali::Toolkit::Text::DEFAULT_RENDERING_BACKEND;
+
+  /**
+   * @brief How the text visual should be aligned vertically inside the control.
+   *
+   * 0.0f aligns the text to the top, 0.5f aligns the text to the center, 1.0f aligns the text to the bottom.
+   * The alignment depends on the alignment value of the text label (Use Text::VerticalAlignment enumerations).
+   */
+  const float VERTICAL_ALIGNMENT_TABLE[ Text::VerticalAlignment::BOTTOM + 1 ] =
+  {
+    0.0f,  // VerticalAlignment::TOP
+    0.5f,  // VerticalAlignment::CENTER
+    1.0f   // VerticalAlignment::BOTTOM
+  };
 }
 
 namespace
@@ -116,6 +130,10 @@ DALI_PROPERTY_REGISTRATION( Toolkit,           TextLabel, "autoScrollStopMode",
 DALI_PROPERTY_REGISTRATION_READ_ONLY( Toolkit, TextLabel, "lineCount",                 INTEGER, LINE_COUNT                 )
 DALI_PROPERTY_REGISTRATION( Toolkit,           TextLabel, "lineWrapMode",              INTEGER, LINE_WRAP_MODE             )
 DALI_DEVEL_PROPERTY_REGISTRATION_READ_ONLY( Toolkit, TextLabel, "textDirection",       INTEGER, TEXT_DIRECTION             )
+DALI_DEVEL_PROPERTY_REGISTRATION( Toolkit,     TextLabel, "verticalLineAlignment",     INTEGER, VERTICAL_LINE_ALIGNMENT    )
+DALI_DEVEL_PROPERTY_REGISTRATION( Toolkit,     TextLabel, "textBackground",            MAP,     BACKGROUND                 )
+DALI_DEVEL_PROPERTY_REGISTRATION( Toolkit,     TextLabel, "ignoreSpacesAfterText",     BOOLEAN, IGNORE_SPACES_AFTER_TEXT   )
+DALI_DEVEL_PROPERTY_REGISTRATION( Toolkit,     TextLabel, "matchSystemLanguageDirection", BOOLEAN, MATCH_SYSTEM_LANGUAGE_DIRECTION )
 DALI_ANIMATABLE_PROPERTY_REGISTRATION_WITH_DEFAULT( Toolkit, TextLabel, "textColor",      Color::BLACK,     TEXT_COLOR     )
 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION( Toolkit,    TextLabel, "textColorRed",   TEXT_COLOR_RED,   TEXT_COLOR, 0  )
 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION( Toolkit,    TextLabel, "textColorGreen", TEXT_COLOR_GREEN, TEXT_COLOR, 1  )
@@ -346,7 +364,6 @@ void TextLabel::SetProperty( BaseObject* object, Property::Index index, const Pr
              // If request is enable (true) then start autoscroll as not already running
              else
              {
-               impl.mController->SetTextElideEnabled( false );
                impl.mController->SetAutoScrollEnabled( enableAutoScroll );
              }
           }
@@ -410,8 +427,12 @@ void TextLabel::SetProperty( BaseObject* object, Property::Index index, const Pr
         if( impl.mController )
         {
           const float lineSpacing = value.Get<float>();
-          impl.mController->SetDefaultLineSpacing( lineSpacing );
-          impl.mTextUpdateNeeded = true;
+
+          // Don't trigger anything if the line spacing didn't change
+          if( impl.mController->SetDefaultLineSpacing( lineSpacing ) )
+          {
+            impl.mTextUpdateNeeded = true;
+          }
         }
         break;
       }
@@ -489,8 +510,56 @@ void TextLabel::SetProperty( BaseObject* object, Property::Index index, const Pr
         }
         break;
       }
+      case Toolkit::DevelTextLabel::Property::VERTICAL_LINE_ALIGNMENT:
+      {
+        if( impl.mController && impl.mController->GetTextModel() )
+        {
+          DevelText::VerticalLineAlignment::Type alignment = static_cast<DevelText::VerticalLineAlignment::Type>( value.Get<int>() );
+
+          impl.mController->SetVerticalLineAlignment( alignment );
+
+          // Property doesn't affect the layout, only Visual must be updated
+          TextVisual::EnableRendererUpdate( impl.mVisual );
+
+          // No need to trigger full re-layout. Instead call UpdateRenderer() directly
+          TextVisual::UpdateRenderer( impl.mVisual );
+        }
+        break;
+      }
+      case Toolkit::DevelTextLabel::Property::BACKGROUND:
+      {
+        const bool update = SetBackgroundProperties( impl.mController, value, Text::EffectStyle::DEFAULT );
+        if( update )
+        {
+          impl.mTextUpdateNeeded = true;
+        }
+        break;
+      }
+      case Toolkit::DevelTextLabel::Property::IGNORE_SPACES_AFTER_TEXT:
+      {
+        impl.mController->SetIgnoreSpacesAfterText(value.Get< bool >());
+        break;
+      }
+      case Toolkit::DevelTextLabel::Property::MATCH_SYSTEM_LANGUAGE_DIRECTION:
+      {
+        impl.mController->SetMatchSystemLanguageDirection(value.Get< bool >());
+        break;
+      }
+    }
+
+    // Request relayout when text update is needed. It's necessary to call it
+    // as changing the property not via UI interaction brings no effect if only
+    // the mTextUpdateNeeded is changed.
+    if( impl.mTextUpdateNeeded )
+    {
+      // need to request relayout as size of text may have changed
+      impl.RequestTextRelayout();
     }
   }
+
+
+
+
 }
 
 Property::Value TextLabel::GetProperty( BaseObject* object, Property::Index index )
@@ -761,6 +830,29 @@ Property::Value TextLabel::GetProperty( BaseObject* object, Property::Index inde
         }
         break;
       }
+      case Toolkit::DevelTextLabel::Property::VERTICAL_LINE_ALIGNMENT:
+      {
+        if( impl.mController )
+        {
+          value = impl.mController->GetVerticalLineAlignment();
+        }
+        break;
+      }
+      case Toolkit::DevelTextLabel::Property::BACKGROUND:
+      {
+        GetBackgroundProperties( impl.mController, value, Text::EffectStyle::DEFAULT );
+        break;
+      }
+      case Toolkit::DevelTextLabel::Property::IGNORE_SPACES_AFTER_TEXT:
+      {
+        value = impl.mController->IsIgnoreSpacesAfterText();
+        break;
+      }
+      case Toolkit::DevelTextLabel::Property::MATCH_SYSTEM_LANGUAGE_DIRECTION:
+      {
+        value = impl.mController->IsMatchSystemLanguageDirection();
+        break;
+      }
     }
   }
 
@@ -792,6 +884,11 @@ void TextLabel::OnInitialize()
   // Enable the text ellipsis.
   mController->SetTextElideEnabled( true );   // If false then text larger than control will overflow
 
+  // Sets layoutDirection value
+  Dali::Stage stage = Dali::Stage::GetCurrent();
+  Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>( stage.GetRootLayer().GetProperty( Dali::Actor::Property::LAYOUT_DIRECTION ).Get<int>() );
+  mController->SetLayoutDirection( layoutDirection );
+
   Layout::Engine& engine = mController->GetLayoutEngine();
   engine.SetCursorWidth( 0u ); // Do not layout space for the cursor.
 }
@@ -881,7 +978,10 @@ void TextLabel::OnRelayout( const Vector2& size, RelayoutContainer& container )
 
   Vector2 contentSize( size.x - ( padding.start + padding.end ), size.y - ( padding.top + padding.bottom ) );
 
-  const Text::Controller::UpdateTextType updateTextType = mController->Relayout( contentSize );
+  // Support Right-To-Left
+  Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>( Self().GetProperty( Dali::Actor::Property::LAYOUT_DIRECTION ).Get<int>() );
+
+  const Text::Controller::UpdateTextType updateTextType = mController->Relayout( contentSize, layoutDirection );
 
   if( ( Text::Controller::NONE_UPDATED != ( Text::Controller::MODEL_UPDATED & updateTextType ) )
      || mTextUpdateNeeded )
@@ -892,16 +992,34 @@ void TextLabel::OnRelayout( const Vector2& size, RelayoutContainer& container )
     TextVisual::EnableRendererUpdate( mVisual );
 
     // Support Right-To-Left of padding
-    Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>( Self().GetProperty( Dali::Actor::Property::LAYOUT_DIRECTION ).Get<int>() );
     if( Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection )
     {
       std::swap( padding.start, padding.end );
     }
 
+    // Calculate the size of the visual that can fit the text
+    Size layoutSize = mController->GetTextModel()->GetLayoutSize();
+    layoutSize.x = contentSize.x;
+
+    const Vector2& shadowOffset = mController->GetTextModel()->GetShadowOffset();
+    if ( shadowOffset.y > Math::MACHINE_EPSILON_1 )
+    {
+      layoutSize.y += shadowOffset.y;
+    }
+
+    float outlineWidth = mController->GetTextModel()->GetOutlineWidth();
+    layoutSize.y += outlineWidth * 2.0f;
+    layoutSize.y = std::min( layoutSize.y, contentSize.y );
+
+    // Calculate the offset for vertical alignment only, as the layout engine will do the horizontal alignment.
+    Vector2 alignmentOffset;
+    alignmentOffset.x = 0.0f;
+    alignmentOffset.y = ( contentSize.y - layoutSize.y ) * VERTICAL_ALIGNMENT_TABLE[mController->GetVerticalAlignment()];
+
     Property::Map visualTransform;
-    visualTransform.Add( Toolkit::Visual::Transform::Property::SIZE, contentSize )
+    visualTransform.Add( Toolkit::Visual::Transform::Property::SIZE, layoutSize )
                    .Add( Toolkit::Visual::Transform::Property::SIZE_POLICY, Vector2( Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE ) )
-                   .Add( Toolkit::Visual::Transform::Property::OFFSET, Vector2( padding.start, padding.top ) )
+                   .Add( Toolkit::Visual::Transform::Property::OFFSET, Vector2( padding.start, padding.top ) + alignmentOffset )
                    .Add( Toolkit::Visual::Transform::Property::OFFSET_POLICY, Vector2( Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE ) )
                    .Add( Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN )
                    .Add( Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN );
@@ -919,6 +1037,7 @@ void TextLabel::OnRelayout( const Vector2& size, RelayoutContainer& container )
 void TextLabel::RequestTextRelayout()
 {
   RelayoutRequest();
+  Toolkit::DevelControl::RequestLayout( *this );
 }
 
 void TextLabel::SetUpAutoScrolling()
@@ -961,7 +1080,7 @@ void TextLabel::SetUpAutoScrolling()
 
   Text::TypesetterPtr typesetter = Text::Typesetter::New( mController->GetTextModel() );
 
-  PixelData data = typesetter->Render( verifiedSize, Text::Typesetter::RENDER_TEXT_AND_STYLES, true, Pixel::RGBA8888 ); // ignore the horizontal alignment
+  PixelData data = typesetter->Render( verifiedSize, mController->GetTextDirection(), Text::Typesetter::RENDER_TEXT_AND_STYLES, true, Pixel::RGBA8888 ); // ignore the horizontal alignment
   Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D,
                                   data.GetPixelFormat(),
                                   data.GetWidth(),