build custom layer of Dojo to speed up loading of tt-rss (refs #293)

1 files changed, 106 insertions, 54 deletions

diff --git a/lib/dojo/dnd/Mover.js b/lib/dojo/dnd/Mover.js
index 6ea793efc..cdb995c08 100644
--- a/lib/dojo/dnd/Mover.js
+++ b/lib/dojo/dnd/Mover.js
@@ -5,61 +5,113 @@
 */
 
 
-if(!dojo._hasResource["dojo.dnd.Mover"]){
-dojo._hasResource["dojo.dnd.Mover"]=true;
+if(!dojo._hasResource["dojo.dnd.Mover"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.dnd.Mover"] = true;
 dojo.provide("dojo.dnd.Mover");
+
 dojo.require("dojo.dnd.common");
 dojo.require("dojo.dnd.autoscroll");
-dojo.declare("dojo.dnd.Mover",null,{constructor:function(_1,e,_2){
-this.node=dojo.byId(_1);
-this.marginBox={l:e.pageX,t:e.pageY};
-this.mouseButton=e.button;
-var h=this.host=_2,d=_1.ownerDocument,_3=dojo.connect(d,"onmousemove",this,"onFirstMove");
-this.events=[dojo.connect(d,"onmousemove",this,"onMouseMove"),dojo.connect(d,"onmouseup",this,"onMouseUp"),dojo.connect(d,"ondragstart",dojo.stopEvent),dojo.connect(d.body,"onselectstart",dojo.stopEvent),_3];
-if(h&&h.onMoveStart){
-h.onMoveStart(this);
-}
-},onMouseMove:function(e){
-dojo.dnd.autoScroll(e);
-var m=this.marginBox;
-this.host.onMove(this,{l:m.l+e.pageX,t:m.t+e.pageY},e);
-dojo.stopEvent(e);
-},onMouseUp:function(e){
-if(dojo.isWebKit&&dojo.isMac&&this.mouseButton==2?e.button==0:this.mouseButton==e.button){
-this.destroy();
-}
-dojo.stopEvent(e);
-},onFirstMove:function(e){
-var s=this.node.style,l,t,h=this.host;
-switch(s.position){
-case "relative":
-case "absolute":
-l=Math.round(parseFloat(s.left))||0;
-t=Math.round(parseFloat(s.top))||0;
-break;
-default:
-s.position="absolute";
-var m=dojo.marginBox(this.node);
-var b=dojo.doc.body;
-var bs=dojo.getComputedStyle(b);
-var bm=dojo._getMarginBox(b,bs);
-var bc=dojo._getContentBox(b,bs);
-l=m.l-(bc.l-bm.l);
-t=m.t-(bc.t-bm.t);
-break;
-}
-this.marginBox.l=l-this.marginBox.l;
-this.marginBox.t=t-this.marginBox.t;
-if(h&&h.onFirstMove){
-h.onFirstMove(this,e);
-}
-dojo.disconnect(this.events.pop());
-},destroy:function(){
-dojo.forEach(this.events,dojo.disconnect);
-var h=this.host;
-if(h&&h.onMoveStop){
-h.onMoveStop(this);
-}
-this.events=this.node=this.host=null;
-}});
+
+dojo.declare("dojo.dnd.Mover", null, {
+	constructor: function(node, e, host){
+		// summary:
+		//		an object, which makes a node follow the mouse. 
+		//		Used as a default mover, and as a base class for custom movers.
+		// node: Node
+		//		a node (or node's id) to be moved
+		// e: Event
+		//		a mouse event, which started the move;
+		//		only pageX and pageY properties are used
+		// host: Object?
+		//		object which implements the functionality of the move,
+		//	 	and defines proper events (onMoveStart and onMoveStop)
+		this.node = dojo.byId(node);
+		this.marginBox = {l: e.pageX, t: e.pageY};
+		this.mouseButton = e.button;
+		var h = this.host = host, d = node.ownerDocument, 
+			firstEvent = dojo.connect(d, "onmousemove", this, "onFirstMove");
+		this.events = [
+			dojo.connect(d, "onmousemove", this, "onMouseMove"),
+			dojo.connect(d, "onmouseup",   this, "onMouseUp"),
+			// cancel text selection and text dragging
+			dojo.connect(d, "ondragstart",   dojo.stopEvent),
+			dojo.connect(d.body, "onselectstart", dojo.stopEvent),
+			firstEvent
+		];
+		// notify that the move has started
+		if(h && h.onMoveStart){
+			h.onMoveStart(this);
+		}
+	},
+	// mouse event processors
+	onMouseMove: function(e){
+		// summary:
+		//		event processor for onmousemove
+		// e: Event
+		//		mouse event
+		dojo.dnd.autoScroll(e);
+		var m = this.marginBox;
+		this.host.onMove(this, {l: m.l + e.pageX, t: m.t + e.pageY}, e);
+		dojo.stopEvent(e);
+	},
+	onMouseUp: function(e){
+		if(dojo.isWebKit && dojo.isMac && this.mouseButton == 2 ? 
+				e.button == 0 : this.mouseButton == e.button){
+			this.destroy();
+		}
+		dojo.stopEvent(e);
+	},
+	// utilities
+	onFirstMove: function(e){
+		// summary:
+		//		makes the node absolute; it is meant to be called only once. 
+		// 		relative and absolutely positioned nodes are assumed to use pixel units
+		var s = this.node.style, l, t, h = this.host;
+		switch(s.position){
+			case "relative":
+			case "absolute":
+				// assume that left and top values are in pixels already
+				l = Math.round(parseFloat(s.left)) || 0;
+				t = Math.round(parseFloat(s.top)) || 0;
+				break;
+			default:
+				s.position = "absolute";	// enforcing the absolute mode
+				var m = dojo.marginBox(this.node);
+				// event.pageX/pageY (which we used to generate the initial
+				// margin box) includes padding and margin set on the body.
+				// However, setting the node's position to absolute and then
+				// doing dojo.marginBox on it *doesn't* take that additional
+				// space into account - so we need to subtract the combined
+				// padding and margin.  We use getComputedStyle and
+				// _getMarginBox/_getContentBox to avoid the extra lookup of
+				// the computed style. 
+				var b = dojo.doc.body;
+				var bs = dojo.getComputedStyle(b);
+				var bm = dojo._getMarginBox(b, bs);
+				var bc = dojo._getContentBox(b, bs);
+				l = m.l - (bc.l - bm.l);
+				t = m.t - (bc.t - bm.t);
+				break;
+		}
+		this.marginBox.l = l - this.marginBox.l;
+		this.marginBox.t = t - this.marginBox.t;
+		if(h && h.onFirstMove){
+			h.onFirstMove(this, e);
+		}
+		dojo.disconnect(this.events.pop());
+	},
+	destroy: function(){
+		// summary:
+		//		stops the move, deletes all references, so the object can be garbage-collected
+		dojo.forEach(this.events, dojo.disconnect);
+		// undo global settings
+		var h = this.host;
+		if(h && h.onMoveStop){
+			h.onMoveStop(this);
+		}
+		// destroy objects
+		this.events = this.node = this.host = null;
+	}
+});
+
 }