annotate johndyer-mediaelement-13fa20a/src/js/mep-feature-progress.js @ 25:4a4bd554b4c1 tip

Closing this sub branch.

(function($) {
	// progress/loaded bar
	MediaElementPlayer.prototype.buildprogress = function(player, controls, layers, media) {

		$('<div class="mejs-time-rail">'+
			'<span class="mejs-time-total">'+
				'<span class="mejs-time-loaded"></span>'+
				'<span class="mejs-time-current"></span>'+
				'<span class="mejs-time-handle"></span>'+
				'<span class="mejs-time-float">' + 
					'<span class="mejs-time-float-current">00:00</span>' + 
					'<span class="mejs-time-float-corner"></span>' + 
				'</span>'+
			'</span>'+
		'</div>')
			.appendTo(controls);

		var 
			t = this,
			total = controls.find('.mejs-time-total'),
			loaded  = controls.find('.mejs-time-loaded'),
			current  = controls.find('.mejs-time-current'),
			handle  = controls.find('.mejs-time-handle'),
			timefloat  = controls.find('.mejs-time-float'),
			timefloatcurrent  = controls.find('.mejs-time-float-current'),
			handleMouseMove = function (e) {
				// mouse position relative to the object
				var x = e.pageX,
					offset = total.offset(),
					width = total.outerWidth(),
					percentage = 0,
					newTime = 0;


				if (x > offset.left && x <= width + offset.left && media.duration) {
					percentage = ((x - offset.left) / width);
					newTime = (percentage <= 0.02) ? 0 : percentage * media.duration;

					// seek to where the mouse is
					if (mouseIsDown) {
						media.setCurrentTime(newTime);
					}

					// position floating time box
					var pos = x - offset.left;
					timefloat.css('left', pos);
					timefloatcurrent.html( mejs.Utility.secondsToTimeCode(newTime) );
				}
			},
			mouseIsDown = false,
			mouseIsOver = false;

		// handle clicks
		//controls.find('.mejs-time-rail').delegate('span', 'click', handleMouseMove);
		total
			.bind('mousedown', function (e) {
				mouseIsDown = true;
				handleMouseMove(e);
				return false;
			});

		controls.find('.mejs-time-rail')
			.bind('mouseenter', function(e) {
				mouseIsOver = true;
			})
			.bind('mouseleave',function(e) {
				mouseIsOver = false;
			});

		$(document)
			.bind('mouseup', function (e) {
				mouseIsDown = false;
				//handleMouseMove(e);
			})
			.bind('mousemove', function (e) {
				if (mouseIsDown || mouseIsOver) {
					handleMouseMove(e);
				}
			});

		// loading
		media.addEventListener('progress', function (e) {
			player.setProgressRail(e);
			player.setCurrentRail(e);
		}, false);

		// current time
		media.addEventListener('timeupdate', function(e) {
			player.setProgressRail(e);
			player.setCurrentRail(e);
		}, false);
		
		
		// store for later use
		t.loaded = loaded;
		t.total = total;
		t.current = current;
		t.handle = handle;
	}
	MediaElementPlayer.prototype.setProgressRail = function(e) {

		var
			t = this,
			target = (e != undefined) ? e.target : t.media,
			percent = null;			

		// newest HTML5 spec has buffered array (FF4, Webkit)
		if (target && target.buffered && target.buffered.length > 0 && target.buffered.end && target.duration) {
			// TODO: account for a real array with multiple values (only Firefox 4 has this so far) 
			percent = target.buffered.end(0) / target.duration;
		} 
		// Some browsers (e.g., FF3.6 and Safari 5) cannot calculate target.bufferered.end()
		// to be anything other than 0. If the byte count is available we use this instead.
		// Browsers that support the else if do not seem to have the bufferedBytes value and
		// should skip to there. Tested in Safari 5, Webkit head, FF3.6, Chrome 6, IE 7/8.
		else if (target && target.bytesTotal != undefined && target.bytesTotal > 0 && target.bufferedBytes != undefined) {
			percent = target.bufferedBytes / target.bytesTotal;
		}
		// Firefox 3 with an Ogg file seems to go this way
		else if (e && e.lengthComputable && e.total != 0) {
			percent = e.loaded/e.total;
		}

		// finally update the progress bar
		if (percent !== null) {
			percent = Math.min(1, Math.max(0, percent));
			// update loaded bar
			if (t.loaded && t.total) {
				t.loaded.width(t.total.width() * percent);
			}
		}
	}
	MediaElementPlayer.prototype.setCurrentRail = function() {

		var t = this;
	
		if (t.media.currentTime != undefined && t.media.duration) {

			// update bar and handle
			if (t.total && t.handle) {
				var 
					newWidth = t.total.width() * t.media.currentTime / t.media.duration,
					handlePos = newWidth - (t.handle.outerWidth(true) / 2);

				t.current.width(newWidth);
				t.handle.css('left', handlePos);
			}
		}

	}	

})(mejs.$);