From: Nick Holland <nick.holland@partner.samsung.com>
Date: Mon, 3 Aug 2015 06:52:45 +0000 (+0100)
Subject: Added getNaturalSize, getWidthForHeight, getHeightForWidth JS API's
X-Git-Tag: dali_1.0.52~7
X-Git-Url: http://review.tizen.org/git/?p=platform%2Fcore%2Fuifw%2Fdali-toolkit.git;a=commitdiff_plain;h=1b74a860953d1584ae2a3eecbdd1508f6a614557

Added getNaturalSize, getWidthForHeight, getHeightForWidth JS API's

Change-Id: I8056dedb24bf9cb27dc3d824ef752a1f67d9ccf0
---

diff --git a/plugins/dali-script-v8/src/actors/actor-api.cpp b/plugins/dali-script-v8/src/actors/actor-api.cpp
index b36f68a..f712893 100644
--- a/plugins/dali-script-v8/src/actors/actor-api.cpp
+++ b/plugins/dali-script-v8/src/actors/actor-api.cpp
@@ -499,6 +499,93 @@ void ActorApi::GetActorType( const v8::FunctionCallbackInfo<v8::Value>& args )
   args.GetReturnValue().Set( v8String );
 }
 /**
+ * Return the natural size of the actor.
+ *
+ * @for Actor
+ * @method getNaturalSize
+ * @return {Object} { x, y, z }
+ */
+void ActorApi::GetNaturalSize( const v8::FunctionCallbackInfo<v8::Value>& args )
+{
+  v8::Isolate* isolate = args.GetIsolate();
+  v8::HandleScope handleScope( isolate );
+  Actor actor = GetActor( isolate, args );
+
+  Vector3 size( actor.GetNaturalSize() );
+
+  v8::Local<v8::Object> sizeObject = v8::Object::New( isolate );
+
+  sizeObject->Set( v8::String::NewFromUtf8( isolate, "x" ), v8::Integer::New( isolate, size.width ) );
+  sizeObject->Set( v8::String::NewFromUtf8( isolate, "y" ), v8::Integer::New( isolate, size.height ) );
+  sizeObject->Set( v8::String::NewFromUtf8( isolate, "z" ), v8::Integer::New( isolate, size.depth ) );
+
+  args.GetReturnValue().Set( sizeObject );
+}
+
+/**
+ *  Calculate the width of the actor given a height
+ *
+ * The natural size is used for default calculation.
+ * size 0 is treated as aspect ratio 1:1.
+ * @for Actor
+ * @method getWidthForHeight
+ * @param {Float} height to use
+ * @return {Float} Return the width based on the height
+ * @example
+ *   myTextLabel.getWidthForHeight(40);
+ *
+ * // DALi uses this formula internally
+ * // width = naturalSize.width * height / naturalSize.height;
+ *
+ *
+ */
+void ActorApi::GetWidthForHeight( const v8::FunctionCallbackInfo<v8::Value>& args )
+{
+  v8::Isolate* isolate = args.GetIsolate();
+  v8::HandleScope handleScope( isolate );
+  Actor actor = GetActor( isolate, args );
+
+  bool found;
+  float height = V8Utils::GetFloatParameter( PARAMETER_0, found, isolate, args, 0.f );
+  if( !found )
+  {
+    DALI_SCRIPT_EXCEPTION( isolate, "missing height parameter");
+    return;
+  }
+  args.GetReturnValue().Set( v8::Number::New( isolate, actor.GetWidthForHeight( height ) ) );
+}
+
+/**
+ *  Calculate the height of the actor given a width
+ *
+ * The natural size is used for default calculation.
+ * size 0 is treated as aspect ratio 1:1.
+ * @for Actor
+ * @method getHeightForWidth
+ * @param {Float} width to use
+ * @return {Float} Return the height based on the width
+ * @example
+ *   myTextLabel.getHeightForWidth(250);
+ *
+ * // DALi uses this formula internally
+ * // height = naturalSize.height * width / naturalSize.width
+ */
+void ActorApi::GetHeightForWidth( const v8::FunctionCallbackInfo<v8::Value>& args )
+{
+  v8::Isolate* isolate = args.GetIsolate();
+  v8::HandleScope handleScope( isolate );
+  Actor actor = GetActor( isolate, args );
+
+  bool found;
+  float width = V8Utils::GetFloatParameter( PARAMETER_0, found, isolate, args, 0.f );
+  if( !found )
+  {
+    DALI_SCRIPT_EXCEPTION( isolate, "missing width parameter");
+    return;
+  }
+  args.GetReturnValue().Set( v8::Number::New( isolate, actor.GetHeightForWidth( width ) ) );
+}
+/**
  * Move an actor relative to its existing position.
  * @example
  *
diff --git a/plugins/dali-script-v8/src/actors/actor-api.h b/plugins/dali-script-v8/src/actors/actor-api.h
index 8543f11..82f41d3 100644
--- a/plugins/dali-script-v8/src/actors/actor-api.h
+++ b/plugins/dali-script-v8/src/actors/actor-api.h
@@ -64,6 +64,9 @@ namespace ActorApi
   void ScreenToLocal( const v8::FunctionCallbackInfo< v8::Value >& args );
   void SetKeyboardFocusable( const v8::FunctionCallbackInfo< v8::Value >& args );
   void IsKeyboardFocusable( const v8::FunctionCallbackInfo< v8::Value >& args );
+  void GetNaturalSize( const v8::FunctionCallbackInfo< v8::Value >& args );
+  void GetWidthForHeight( const v8::FunctionCallbackInfo<v8::Value>& args );
+  void GetHeightForWidth( const v8::FunctionCallbackInfo<v8::Value>& args );
   void TranslateBy( const v8::FunctionCallbackInfo< v8::Value >& args );
   void RotateBy( const v8::FunctionCallbackInfo< v8::Value >& args );
   void ScaleBy( const v8::FunctionCallbackInfo< v8::Value >& args );
diff --git a/plugins/dali-script-v8/src/actors/actor-wrapper.cpp b/plugins/dali-script-v8/src/actors/actor-wrapper.cpp
index b242721..9b81f41 100644
--- a/plugins/dali-script-v8/src/actors/actor-wrapper.cpp
+++ b/plugins/dali-script-v8/src/actors/actor-wrapper.cpp
@@ -183,6 +183,9 @@ const ActorFunctions ActorFunctionTable[]=
     // ignore. GetCurrentAnchorPoint()  use Actor.anchorPoint
     // ignore. SetSize() use Actor.size
     // ignore. GetCurrentSize() use Actor.size
+    { "GetNaturalSize",   ActorApi::GetNaturalSize,    ACTOR_API },
+    { "GetWidthForHeight",ActorApi::GetWidthForHeight, ACTOR_API },
+    { "GetHeightForWidth",ActorApi::GetHeightForWidth, ACTOR_API },
     // ignore. SetPosition(....) use Actor.position
     // ignore. SetX, SetY, SetZ,  use Actor.position.x, Actor.position.y, Actor.position.z
     { "TranslateBy",         ActorApi::TranslateBy,              ACTOR_API },