Revert "Fix focus issue after calling ClearFocus api"
[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / focus-manager / keyboard-focus-manager-impl.cpp
index 28d305d..3555b3c 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2017 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.
@@ -29,6 +29,7 @@
 #include <dali/public-api/events/touch-data.h>
 #include <dali/public-api/object/type-registry.h>
 #include <dali/public-api/object/type-registry-helper.h>
+#include <dali/public-api/object/property-map.h>
 #include <dali/public-api/images/resource-image.h>
 #include <dali/integration-api/debug.h>
 
@@ -37,8 +38,9 @@
 #include <dali-toolkit/public-api/controls/control-impl.h>
 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
 #include <dali-toolkit/public-api/accessibility-manager/accessibility-manager.h>
-#include <dali-toolkit/devel-api/focus-manager/keyinput-focus-manager.h>
 #include <dali-toolkit/devel-api/controls/control-devel.h>
+#include <dali-toolkit/public-api/styling/style-manager.h>
+#include <dali-toolkit/devel-api/styling/style-manager-devel.h>
 
 namespace Dali
 {
@@ -115,16 +117,19 @@ KeyboardFocusManager::KeyboardFocusManager()
   mFocusChangedSignal(),
   mFocusGroupChangedSignal(),
   mFocusedActorEnterKeySignal(),
-  mCurrentFocusActor( 0 ),
+  mCurrentFocusActor(),
   mFocusIndicatorActor(),
+  mIsFocusIndicatorEnabled( -1 ),
   mFocusGroupLoopEnabled( false ),
-  mIsFocusIndicatorEnabled( false ),
   mIsWaitingKeyboardFocusChangeCommit( false ),
+  mClearFocusOnTouch( true ),
+  mEnableFocusIndicator( true ),
   mFocusHistory(),
-  mSlotDelegate( this )
+  mSlotDelegate( this ),
+  mCustomAlgorithmInterface(NULL)
 {
   // TODO: Get FocusIndicatorEnable constant from stylesheet to set mIsFocusIndicatorEnabled.
-  Toolkit::KeyInputFocusManager::Get().UnhandledKeyEventSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnKeyEvent);
+  Stage::GetCurrent().KeyEventSignal().Connect( mSlotDelegate, &KeyboardFocusManager::OnKeyEvent);
   Stage::GetCurrent().TouchSignal().Connect( mSlotDelegate, &KeyboardFocusManager::OnTouch );
 }
 
@@ -132,34 +137,54 @@ KeyboardFocusManager::~KeyboardFocusManager()
 {
 }
 
+void KeyboardFocusManager::GetConfigurationFromStyleManger()
+{
+    Toolkit::StyleManager styleManager = Toolkit::StyleManager::Get();
+    if( styleManager )
+    {
+      Property::Map config = Toolkit::DevelStyleManager::GetConfigurations( styleManager );
+      mIsFocusIndicatorEnabled = static_cast<int>(config["alwaysShowFocus"].Get<bool>());
+      mClearFocusOnTouch = mIsFocusIndicatorEnabled ? false : true;
+    }
+}
+
 bool KeyboardFocusManager::SetCurrentFocusActor( Actor actor )
 {
   DALI_ASSERT_DEBUG( !mIsWaitingKeyboardFocusChangeCommit && "Calling this function in the PreFocusChangeSignal callback?" );
 
-  if( actor )
+  if( mIsFocusIndicatorEnabled == -1 )
   {
-    return DoSetCurrentFocusActor( actor.GetId() );
+    GetConfigurationFromStyleManger();
   }
 
-  return false;
+  return DoSetCurrentFocusActor( actor );
 }
 
-bool KeyboardFocusManager::DoSetCurrentFocusActor( const unsigned int actorID )
+bool KeyboardFocusManager::DoSetCurrentFocusActor( Actor actor )
 {
-  Actor rootActor = Stage::GetCurrent().GetRootLayer();
-  Actor actor = rootActor.FindChildById( actorID );
   bool success = false;
 
+  Actor currentFocusedActor = GetCurrentFocusActor();
+
+  // If developer set focus on same actor, doing nothing
+  if( actor == currentFocusedActor )
+  {
+    if( !actor )
+    {
+      return false;
+    }
+    return true;
+  }
+
   // Check whether the actor is in the stage and is keyboard focusable.
-  if( actor && actor.IsKeyboardFocusable() )
+  if( actor && actor.IsKeyboardFocusable() && actor.OnStage() )
   {
-    if( mIsFocusIndicatorEnabled )
+    if( mIsFocusIndicatorEnabled && mEnableFocusIndicator )
     {
       actor.Add( GetFocusIndicatorActor() );
     }
-    // Send notification for the change of focus actor
-    Actor currentFocusedActor = GetCurrentFocusActor();
 
+    // Send notification for the change of focus actor
     if( !mFocusChangedSignal.Empty() )
     {
       mFocusChangedSignal.Emit(currentFocusedActor, actor);
@@ -170,27 +195,29 @@ bool KeyboardFocusManager::DoSetCurrentFocusActor( const unsigned int actorID )
     {
       // Do we need it to remember if it was previously DISABLED?
       currentlyFocusedControl.SetProperty(DevelControl::Property::STATE, DevelControl::NORMAL );
+      currentlyFocusedControl.ClearKeyInputFocus();
     }
 
     DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] Focus Changed\n", __FUNCTION__, __LINE__);
 
     // Save the current focused actor
-    mCurrentFocusActor = actorID;
+    mCurrentFocusActor = actor;
 
     Toolkit::Control newlyFocusedControl = Toolkit::Control::DownCast(actor);
     if( newlyFocusedControl )
     {
       newlyFocusedControl.SetProperty(DevelControl::Property::STATE, DevelControl::FOCUSED );
+      newlyFocusedControl.SetKeyInputFocus();
     }
 
     // Push Current Focused Actor to FocusHistory
-    mFocusHistory.PushBack( &actor.GetBaseObject() );
+    mFocusHistory.push_back( actor );
 
     // Delete first element before add new element when Stack is full.
-    if( mFocusHistory.Count() > MAX_HISTORY_AMOUNT )
+    if( mFocusHistory.size() > MAX_HISTORY_AMOUNT )
     {
-       FocusStackIterator beginPos = mFocusHistory.Begin();
-       mFocusHistory.Erase( beginPos );
+       FocusStackIterator beginPos = mFocusHistory.begin();
+       mFocusHistory.erase( beginPos );
     }
 
     DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] SUCCEED\n", __FUNCTION__, __LINE__);
@@ -206,8 +233,15 @@ bool KeyboardFocusManager::DoSetCurrentFocusActor( const unsigned int actorID )
 
 Actor KeyboardFocusManager::GetCurrentFocusActor()
 {
-  Actor rootActor = Stage::GetCurrent().GetRootLayer();
-  return rootActor.FindChildById(mCurrentFocusActor);
+  Actor actor = mCurrentFocusActor.GetHandle();
+  if( actor && ! actor.OnStage() )
+  {
+    // If the actor has been removed from the stage, then it should not be focused
+
+    actor.Reset();
+    mCurrentFocusActor.Reset();
+  }
+  return actor;
 }
 
 Actor KeyboardFocusManager::GetCurrentFocusGroup()
@@ -218,28 +252,39 @@ Actor KeyboardFocusManager::GetCurrentFocusGroup()
 void KeyboardFocusManager::MoveFocusBackward()
 {
   // Find Pre Focused Actor when the list size is more than 1
-  if( mFocusHistory.Count() > 1 )
+  if( mFocusHistory.size() > 1 )
   {
     // Delete current focused actor in history
-    FocusStackIterator endPos = mFocusHistory.End();
-    endPos = mFocusHistory.Erase( --endPos );
+    mFocusHistory.pop_back();
 
-    // If pre-focused actors are not on stage, remove them in stack
-    while( !Dali::Actor::DownCast(BaseHandle(mFocusHistory[ mFocusHistory.Count() - 1 ])).OnStage() )
+    // If pre-focused actors are not on stage or deleted, remove them in stack
+    while( mFocusHistory.size() > 0 )
     {
-      endPos = mFocusHistory.Erase( --endPos );
-    }
+      // Get pre focused actor
+      Actor target = mFocusHistory[ mFocusHistory.size() -1 ].GetHandle();
 
-    // Get pre focused actor
-    BaseObject* object = mFocusHistory[ mFocusHistory.Count() - 1 ];
-    BaseHandle handle( object );
-    Actor preFocusedActor = Dali::Actor::DownCast( handle );
-
-    // Delete pre focused actor in history because it will pushed again by SetCurrentFocusActor()
-    mFocusHistory.Erase( --endPos );
+      // Impl of Actor is not null
+      if( target && target.OnStage() )
+      {
+        // Delete pre focused actor in history because it will pushed again by SetCurrentFocusActor()
+        mFocusHistory.pop_back();
+        SetCurrentFocusActor( target );
+        break;
+      }
+      else
+      {
+        // Target is empty handle or off stage. Erase from queue
+        mFocusHistory.pop_back();
+      }
+    }
 
-    SetCurrentFocusActor( preFocusedActor );
- }
+    // if there is no actor which can get focus, then push current focus actor in stack again
+    if( mFocusHistory.size() == 0 )
+    {
+      Actor currentFocusedActor = GetCurrentFocusActor();
+      mFocusHistory.push_back( currentFocusedActor );
+    }
+  }
 }
 
 bool KeyboardFocusManager::IsLayoutControl(Actor actor) const
@@ -273,33 +318,106 @@ bool KeyboardFocusManager::MoveFocus(Toolkit::Control::KeyboardFocus::Direction
   bool succeed = false;
 
   // Go through the actor's hierarchy until we find a layout control that knows how to move the focus
-  Toolkit::Control parentLayoutControl = GetParentLayoutControl(currentFocusActor);
-  while(parentLayoutControl && !succeed)
+  Toolkit::Control parentLayoutControl = GetParentLayoutControl( currentFocusActor );
+  while( parentLayoutControl && !succeed )
   {
-    succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, currentFocusActor, direction);
-    parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
+    succeed = DoMoveFocusWithinLayoutControl( parentLayoutControl, currentFocusActor, direction );
+    parentLayoutControl = GetParentLayoutControl( parentLayoutControl );
   }
 
-  if(!succeed && !mPreFocusChangeSignal.Empty())
+  if( !succeed )
   {
-    // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
-    mIsWaitingKeyboardFocusChangeCommit = true;
-    Actor nextFocusableActor = mPreFocusChangeSignal.Emit(currentFocusActor, Actor(), direction);
-    mIsWaitingKeyboardFocusChangeCommit = false;
+    Actor nextFocusableActor;
+
+    Toolkit::Control currentFocusControl = Toolkit::Control::DownCast(currentFocusActor);
+
+    // If the current focused actor is a control, then find the next focusable actor via the focusable properties.
+    if( currentFocusControl )
+    {
+      int actorId = -1;
+      Property::Index index = Property::INVALID_INDEX;
+      Property::Value value;
+
+      // Find property index based upon focus direction
+      switch ( direction )
+      {
+        case Toolkit::Control::KeyboardFocus::LEFT:
+        {
+          index = Toolkit::DevelControl::Property::LEFT_FOCUSABLE_ACTOR_ID;
+          break;
+        }
+        case Toolkit::Control::KeyboardFocus::RIGHT:
+        {
+          index = Toolkit::DevelControl::Property::RIGHT_FOCUSABLE_ACTOR_ID;
+          break;
+        }
+        case Toolkit::Control::KeyboardFocus::UP:
+        {
+          index = Toolkit::DevelControl::Property::UP_FOCUSABLE_ACTOR_ID;
+          break;
+        }
+        case Toolkit::Control::KeyboardFocus::DOWN:
+        {
+          index = Toolkit::DevelControl::Property::DOWN_FOCUSABLE_ACTOR_ID;
+          break;
+        }
+        default:
+          break;
+      }
+
+      // If the focusable property is set then determine next focusable actor
+      if( index != Property::INVALID_INDEX)
+      {
+        value = currentFocusActor.GetProperty( index );
+        actorId = value.Get<int>();
+
+        // If actor's id is valid then find actor form actor's id. The actor should be on the stage.
+        if( actorId != -1 )
+        {
+          if( currentFocusActor.GetParent() )
+          {
+            nextFocusableActor = currentFocusActor.GetParent().FindChildById( actorId );
+          }
+
+          if( !nextFocusableActor )
+          {
+            nextFocusableActor = Stage::GetCurrent().GetRootLayer().FindChildById( actorId );
+          }
+        }
+      }
+    }
+
+    if( !nextFocusableActor )
+    {
+      // If the implementation of CustomAlgorithmInterface is provided then the PreFocusChangeSignal is no longer emitted.
+      if( mCustomAlgorithmInterface )
+      {
+        mIsWaitingKeyboardFocusChangeCommit = true;
+        nextFocusableActor = mCustomAlgorithmInterface->GetNextFocusableActor( currentFocusActor, Actor(), direction );
+        mIsWaitingKeyboardFocusChangeCommit = false;
+      }
+      else if( !mPreFocusChangeSignal.Empty() )
+      {
+        // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
+        mIsWaitingKeyboardFocusChangeCommit = true;
+        nextFocusableActor = mPreFocusChangeSignal.Emit( currentFocusActor, Actor(), direction );
+        mIsWaitingKeyboardFocusChangeCommit = false;
+      }
+    }
 
-    if ( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
+    if( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
     {
       // Whether the next focusable actor is a layout control
-      if(IsLayoutControl(nextFocusableActor))
+      if( IsLayoutControl( nextFocusableActor ) )
       {
         // If so, move the focus inside it.
-        Toolkit::Control layoutControl = Toolkit::Control::DownCast(nextFocusableActor);
-        succeed = DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
+        Toolkit::Control layoutControl = Toolkit::Control::DownCast( nextFocusableActor) ;
+        succeed = DoMoveFocusWithinLayoutControl( layoutControl, currentFocusActor, direction );
       }
       else
       {
         // Otherwise, just set focus to the next focusable actor
-        succeed = SetCurrentFocusActor(nextFocusableActor);
+        succeed = SetCurrentFocusActor( nextFocusableActor );
       }
     }
   }
@@ -432,11 +550,12 @@ void KeyboardFocusManager::ClearFocus()
     if( currentlyFocusedControl )
     {
       currentlyFocusedControl.SetProperty( DevelControl::Property::STATE, DevelControl::NORMAL );
+      currentlyFocusedControl.ClearKeyInputFocus();
     }
   }
 
-  mCurrentFocusActor = 0;
-  mIsFocusIndicatorEnabled = false;
+  mCurrentFocusActor.Reset();
+  mIsFocusIndicatorEnabled = 0;
 }
 
 void KeyboardFocusManager::SetFocusGroupLoop(bool enabled)
@@ -515,12 +634,15 @@ Actor KeyboardFocusManager::GetFocusIndicatorActor()
   {
     // Create the default if it hasn't been set and one that's shared by all the keyboard focusable actors
     mFocusIndicatorActor = Toolkit::ImageView::New( FOCUS_BORDER_IMAGE_PATH );
-    mFocusIndicatorActor.SetParentOrigin( ParentOrigin::CENTER );
 
     // Apply size constraint to the focus indicator
     mFocusIndicatorActor.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
   }
 
+  mFocusIndicatorActor.SetParentOrigin( ParentOrigin::CENTER );
+  mFocusIndicatorActor.SetAnchorPoint( AnchorPoint::CENTER );
+  mFocusIndicatorActor.SetPosition(0.0f, 0.0f);
+
   return mFocusIndicatorActor;
 }
 
@@ -533,6 +655,11 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 
   std::string keyName = event.keyPressedName;
 
+  if( mIsFocusIndicatorEnabled == -1 )
+  {
+    GetConfigurationFromStyleManger();
+  }
+
   bool isFocusStartableKey = false;
 
   if(event.state == KeyEvent::Down)
@@ -544,7 +671,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
         if(!mIsFocusIndicatorEnabled)
         {
           // Show focus indicator
-          mIsFocusIndicatorEnabled = true;
+          mIsFocusIndicatorEnabled = 1;
         }
         else
         {
@@ -567,7 +694,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
         if(!mIsFocusIndicatorEnabled)
         {
           // Show focus indicator
-          mIsFocusIndicatorEnabled = true;
+          mIsFocusIndicatorEnabled = 1;
         }
         else
         {
@@ -588,7 +715,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
       else
       {
@@ -603,7 +730,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
       else
       {
@@ -618,7 +745,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
       else
       {
@@ -633,7 +760,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
       else
       {
@@ -648,7 +775,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
       else
       {
@@ -664,7 +791,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
 
       isFocusStartableKey = true;
@@ -675,7 +802,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
 
       isFocusStartableKey = true;
@@ -695,7 +822,7 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
       if(!mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
       {
         // Show focus indicator
-        mIsFocusIndicatorEnabled = true;
+        mIsFocusIndicatorEnabled = 1;
       }
       else
       {
@@ -725,8 +852,11 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
     Actor actor = GetCurrentFocusActor();
     if( actor )
     {
-      // Make sure the focused actor is highlighted
-      actor.Add( GetFocusIndicatorActor() );
+      if( mEnableFocusIndicator )
+      {
+        // Make sure the focused actor is highlighted
+        actor.Add( GetFocusIndicatorActor() );
+      }
     }
     else
     {
@@ -739,9 +869,17 @@ void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 
 void KeyboardFocusManager::OnTouch(const TouchData& touch)
 {
+  // if mIsFocusIndicatorEnabled is -1, it means Configuration is not loaded.
+  // Try to load configuration.
+  if( mIsFocusIndicatorEnabled == -1 )
+  {
+    GetConfigurationFromStyleManger();
+  }
+
   // Clear the focus when user touch the screen.
   // We only do this on a Down event, otherwise the clear action may override a manually focused actor.
-  if( ( touch.GetPointCount() < 1 ) || ( touch.GetState( 0 ) == PointState::DOWN ) )
+  // If mClearFocusOnTouch is false, do not clear the focus even if user touch the screen.
+  if( (( touch.GetPointCount() < 1 ) || ( touch.GetState( 0 ) == PointState::DOWN )) && mClearFocusOnTouch )
   {
     ClearFocus();
   }
@@ -799,6 +937,26 @@ bool KeyboardFocusManager::DoConnectSignal( BaseObject* object, ConnectionTracke
   return connected;
 }
 
+void KeyboardFocusManager::SetCustomAlgorithm(CustomAlgorithmInterface& interface)
+{
+  mCustomAlgorithmInterface = &interface;
+}
+
+void KeyboardFocusManager::EnableFocusIndicator(bool enable)
+{
+  if( !enable && mFocusIndicatorActor )
+  {
+    mFocusIndicatorActor.Unparent();
+  }
+
+  mEnableFocusIndicator = enable;
+}
+
+bool KeyboardFocusManager::IsFocusIndicatorEnabled() const
+{
+  return mEnableFocusIndicator;
+}
+
 } // namespace Internal
 
 } // namespace Toolkit