X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/d3b1ea255664edd2deef17f900a655613d20820d..16e7b37c7914d753890c1a05a9335f3b43751eb8:/wp-includes/js/hoverIntent.js diff --git a/wp-includes/js/hoverIntent.js b/wp-includes/js/hoverIntent.js index bed4129c..c0fdf652 100644 --- a/wp-includes/js/hoverIntent.js +++ b/wp-includes/js/hoverIntent.js @@ -1 +1,115 @@ -(function(a){a.fn.hoverIntent=function(l,j){var m={sensitivity:7,interval:100,timeout:0};m=a.extend(m,j?{over:l,out:j}:l);var o,n,h,d;var e=function(f){o=f.pageX;n=f.pageY};var c=function(g,f){f.hoverIntent_t=clearTimeout(f.hoverIntent_t);if((Math.abs(h-o)+Math.abs(d-n)) + */ +(function($) { + $.fn.hoverIntent = function(handlerIn,handlerOut,selector) { + + // default configuration values + var cfg = { + interval: 100, + sensitivity: 6, + timeout: 0 + }; + + if ( typeof handlerIn === "object" ) { + cfg = $.extend(cfg, handlerIn ); + } else if ($.isFunction(handlerOut)) { + cfg = $.extend(cfg, { over: handlerIn, out: handlerOut, selector: selector } ); + } else { + cfg = $.extend(cfg, { over: handlerIn, out: handlerIn, selector: handlerOut } ); + } + + // 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.sqrt( (pX-cX)*(pX-cX) + (pY-cY)*(pY-cY) ) < cfg.sensitivity ) { + $(ob).off("mousemove.hoverIntent",track); + // set hoverIntent state to true (so mouseOut can be called) + ob.hoverIntent_s = true; + 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 = false; + return cfg.out.apply(ob,[ev]); + }; + + // A private function for handling mouse 'hovering' + var handleHover = function(e) { + // copy objects to be passed into t (required for event object to be passed in IE) + var ev = $.extend({},e); + var ob = this; + + // cancel hoverIntent timer if it exists + if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); } + + // if e.type === "mouseenter" + if (e.type === "mouseenter") { + // 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).on("mousemove.hoverIntent",track); + // start polling interval (self-calling timeout) to compare mouse coordinates over time + if (!ob.hoverIntent_s) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );} + + // else e.type == "mouseleave" + } else { + // unbind expensive mousemove event + $(ob).off("mousemove.hoverIntent",track); + // if hoverIntent state is true, then call the mouseOut function after the specified delay + if (ob.hoverIntent_s) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );} + } + }; + + // listen for mouseenter and mouseleave + return this.on({'mouseenter.hoverIntent':handleHover,'mouseleave.hoverIntent':handleHover}, cfg.selector); + }; +})(jQuery);