efl: Split Efl.Container and Efl.Content

When I first implemented the Efl.Container interface I made a mistake of
mixing "single slot" content API's with "multiple children" content
API's.  This should fix that, by separating API's that are for a single
part and those that deal with a list of children.

  Efl.Content: Single slot. This will be used a lot by efl_part()
objects, and for the default content of widgets (eg. the window
content).

  Efl.Container: Multiple children. Used by lists, boxes, layouts
(edje/elm), etc...

I didn't see any class that implemented both interfaces (note: Layout
implements Container and Button implements Content, so technically
Button implements both through inheritance).

For now the eo_prefix is not changed in Efl.Container. I wonder if it
should be reset (to efl_container) or not. This would only affect the C
API.

Ref T5328

unsorted/elementary/button_example_01.js

@@ -1,7 +1,7 @@
 efl = require('efl');
 
 function setIcon(widget, icon) {
-    container = widget.part("icon").cast("Efl.Container");
+    container = widget.part("icon").cast("Efl.Content");
     container.setContent(icon);
 }
 

unsorted/elementary/layout_example.js

@@ -29,7 +29,7 @@ bt = new efl.Efl.Ui.Image(ly);
 bt.setIcon('chat');
 bt.setHintMin(20, 20);
 // elm_layout_icon_set(ly, bt);
-icon_container = ly.part('elm.swallow.icon').cast('Efl.Container');
+icon_container = ly.part('elm.swallow.icon').cast('Efl.Content');
 icon_container.setContent(bt);
 ly.emitSignal('elm,state,icon,visible', 'elm');
 
@@ -37,7 +37,7 @@ bt = new efl.Efl.Ui.Image(ly);
 bt.setIcon('close');
 bt.setHintMin(20, 20);
 // elm_layout_end_set(ly, bt);
-end_container = ly.part('elm.swallow.end').cast('Efl.Container');
+end_container = ly.part('elm.swallow.end').cast('Efl.Content');
 end_container.setContent(bt);
 ly.emitSignal('elm,state,end,visible', 'elm');
 
@@ -56,7 +56,7 @@ ly.setVisible(true);
 bt = new efl.Efl.Ui.Button(ly);
 bt.setPartText(null, "Button 1");
 console.log("Will get part");
-element_container = ly.part('example/custom').cast('Efl.Container');
+element_container = ly.part('example/custom').cast('Efl.Content');
 console.log("Will setcontent on part");
 element_container.setContent(bt);
 

unsorted/elementary/popup_example_01.js

@@ -16,7 +16,7 @@ popup.on('timeout', function()
 			       popup.setVisible(false);
 			   });
 
-content_container = popup.part("elm.swallow.content").cast("Efl.Container");
+content_container = popup.part("elm.swallow.content").cast("Efl.Content");
 content_container.setContent(content);
 
 popup.setPartText("title,text", "Title");

unsorted/elementary/radio_example_01.js

@@ -21,7 +21,7 @@ radio_g.setStateValue(1);
 radio_g.setValue(1);
 ic = new efl.Efl.Ui.Image(win);
 ic.setIcon("home");
-radio_g.part("icon").cast("Efl.Container").setContent(ic);
+radio_g.part("icon").cast("Efl.Content").setContent(ic);
 bx.packEnd(radio_g);
 radio_g.setHintWeight(1.0, 1.0);
 radio_g.setHintAlign(-1.0, -1.0);
@@ -34,7 +34,7 @@ radio.setStateValue(2);
 radio.addGroup(radio_g);
 ic = new efl.Efl.Ui.Image(win);
 ic.setIcon("file");
-radio.part("icon").cast("Efl.Container").setContent(ic);
+radio.part("icon").cast("Efl.Content").setContent(ic);
 bx.packEnd(radio);
 radio.setHintWeight(1.0, 1.0);
 radio.setHintAlign(-1.0, -1.0);

unsorted/elementary/slider_example.js

@@ -24,12 +24,12 @@ sl.setPartText("elm.text", "Counter");
 ic = new efl.Efl.Ui.Image(win);
 ic.setIcon("home");
 // ic.setResizable(false, false);
-sl.part("icon").cast("Efl.Container").setContent(ic);
+sl.part("icon").cast("Efl.Content").setContent(ic);
 
 ic = new efl.Efl.Ui.Image(win);
 ic.setIcon("folder");
 // ic.setResizable(false, false);
-sl.part("end").cast("Efl.Container").setContent(ic);
+sl.part("end").cast("Efl.Content").setContent(ic);
 
 sl.setHintAlign(-1.0, 0.5);
 sl.setHintWeight(1.0, 1.0);

unsorted/elementary/twitter_example_01.js

@@ -58,7 +58,7 @@ twit.get('statuses/user_timeline', {screen_name: user_acount, count:10}, functio
         var entry = new efl.Elm.Entry(win);
         entry.setPartText("elm.text", text);
         entry.setEditable(false);
-        part = layout.part("tweet_text").cast("Efl.Container");
+        part = layout.part("tweet_text").cast("Efl.Content");
         part.setContent(entry);
 
         layout.setHintMin(127, 96);
@@ -68,7 +68,7 @@ twit.get('statuses/user_timeline', {screen_name: user_acount, count:10}, functio
         var icon = new efl.Efl.Ui.Image(win);
         icon.fillInside = true;
         icon_array.push(icon);
-        user_icon = layout.part("user_icon").cast("Efl.Container");
+        user_icon = layout.part("user_icon").cast("Efl.Content");
         user_icon.setContent(icon);
         item = tweet_box.packEnd(layout);
         layout.setVisible(true);