home page is restored, so is context view

backup.rails2.3/hoverIntent.js

@@ -0,0 +1,84 @@
+(function($){
+	/* hoverIntent by Brian Cherne */
+	$.fn.hoverIntent = function(f,g) {
+		// default configuration options
+		var cfg = {
+			sensitivity: 7,
+			interval: 100,
+			timeout: 400
+		};
+		// override configuration options with user supplied object
+		cfg = $.extend(cfg, g ? { over: f, out: g } : f );
+
+		// instantiate variables
+		// cX, cY = current X and Y position of mouse, updated by mousemove event
+		// pX, pY = previous X and Y position of mouse, set by mouseover and polling interval
+		var cX, cY, pX, pY;
+
+		// A private function for getting mouse position
+		var track = function(ev) {
+			cX = ev.pageX;
+			cY = ev.pageY;
+		};
+
+		// A private function for comparing current and previous mouse position
+		var compare = function(ev,ob) {
+			ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
+			// compare mouse positions to see if they've crossed the threshold
+			if ( ( Math.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {
+				$(ob).unbind("mousemove",track);
+				// set hoverIntent state to true (so mouseOut can be called)
+				ob.hoverIntent_s = 1;
+				return cfg.over.apply(ob,[ev]);
+			} else {
+				// set previous coordinates for next time
+				pX = cX; pY = cY;
+				// use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
+				ob.hoverIntent_t = setTimeout( function(){compare(ev, ob);} , cfg.interval );
+			}
+		};
+
+		// A private function for delaying the mouseOut function
+		var delay = function(ev,ob) {
+			ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
+			ob.hoverIntent_s = 0;
+			return cfg.out.apply(ob,[ev]);
+		};
+
+		// A private function for handling mouse 'hovering'
+		var handleHover = function(e) {
+			// next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut
+			var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
+			while ( p && p != this ) { try { p = p.parentNode; } catch(e) { p = this; } }
+			if ( p == this ) { return false; }
+
+			// copy objects to be passed into t (required for event object to be passed in IE)
+			var ev = jQuery.extend({},e);
+			var ob = this;
+
+			// cancel hoverIntent timer if it exists
+			if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }
+
+			// else e.type == "onmouseover"
+			if (e.type == "mouseover") {
+				// set "previous" X and Y position based on initial entry point
+				pX = ev.pageX; pY = ev.pageY;
+				// update "current" X and Y position based on mousemove
+				$(ob).bind("mousemove",track);
+				// start polling interval (self-calling timeout) to compare mouse coordinates over time
+				if (ob.hoverIntent_s != 1) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}
+
+			// else e.type == "onmouseout"
+			} else {
+				// unbind expensive mousemove event
+				$(ob).unbind("mousemove",track);
+				// if hoverIntent state is true, then call the mouseOut function after the specified delay
+				if (ob.hoverIntent_s == 1) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}
+			}
+		};
+
+		// bind the function to the two event listeners
+		return this.mouseover(handleHover).mouseout(handleHover);
+	};
+	
+})(jQuery);