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Changes to reduce the number of times we traverse the parent hierarchy looking for virtual bindings when each event handler is called.

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This commit is contained in:
Kin Blas 2011-03-14 14:25:25 -07:00
parent 9a431c89a5
commit 562d89b762
1 changed files with 34 additions and 14 deletions
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48
js/jquery.mobile.vmouse.js
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@ -26,6 +26,7 @@
(function($, window, document, undefined) {
var dataPropertyName = "virtualMouseBindings",
virtualEventNames = "vmouseover vmousedown vmousemove vmouseup vclick vmouseout vmousecancel".split(" "),
touchEventProps = "clientX clientY pageX pageY screenX screenY".split(" "),
activeDocHandlers = {},
blockMouseEvents = false,
@ -81,6 +82,22 @@ function createVirtualEvent(event, eventType)
return event;
}
function getVirtualBindingFlags(element)
{
var flags = {};
var $ele = $(element);
while ($ele && $ele.length){
var b = $ele.data(dataPropertyName);
for (var k in b) {
if (b[k]){
flags[k] = flags.hasVirtualBinding = true;
}
}
$ele = $ele.parent();
}
return flags;
}
function getClosestElementWithVirtualBinding(element, eventType)
{
var $ele = $(element);
@ -163,11 +180,11 @@ function clearResetTimer()
}
}
function triggerVirtualEvent(eventType, event)
function triggerVirtualEvent(eventType, event, flags)
{
var defaultPrevented = false;
if (getClosestElementWithVirtualBinding(event.target, eventType)) {
if ((flags && flags[eventType]) || (!flags && getClosestElementWithVirtualBinding(event.target, eventType))) {
var ve = createVirtualEvent(event, eventType);
$(event.target).trigger(ve);
defaultPrevented = ve.isDefaultPrevented();
@ -195,7 +212,9 @@ function clearResetTimer()
function handleTouchStart(event)
{
if (getClosestElementWithVirtualBinding(event.target)){
var flags = getVirtualBindingFlags(event.target);
if (flags.hasVirtualBinding){
clearResetTimer();
disableMouseBindings();
@ -210,15 +229,15 @@ function handleTouchStart(event)
startScrollY = window.pageYOffset;
}
triggerVirtualEvent("vmouseover", event);
triggerVirtualEvent("vmousedown", event);
triggerVirtualEvent("vmouseover", event, flags);
triggerVirtualEvent("vmousedown", event, flags);
}
}
function handleScroll(event)
{
if (!didScroll){
triggerVirtualEvent("vmousecancel", event);
triggerVirtualEvent("vmousecancel", event, getVirtualBindingFlags(event.target));
}
didScroll = true;
@ -234,10 +253,11 @@ function handleTouchMove(event)
|| (scrollTopSupported && (startScrollX != window.pageXOffset || startScrollY != window.pageYOffset))
|| (Math.abs(t.pageX - startX) > scrollThreshold || Math.abs(t.pageY - startY) > scrollThreshold);
var flags = getVirtualBindingFlags(event.target);
if (didScroll && !didCancel){
triggerVirtualEvent("vmousecancel", event);
triggerVirtualEvent("vmousecancel", event, flags);
}
triggerVirtualEvent("vmousemove", event);
triggerVirtualEvent("vmousemove", event, flags);
startResetTimer();
}
@ -245,15 +265,16 @@ function handleTouchEnd(event)
{
disableTouchBindings();
triggerVirtualEvent("vmouseup", event);
var flags = getVirtualBindingFlags(event.target);
triggerVirtualEvent("vmouseup", event, flags);
if (!didScroll){
if (triggerVirtualEvent("vclick", event)){
if (triggerVirtualEvent("vclick", event, flags)){
// Push this element on the block list to prevent any clicks
// from getting to the bubble phase.
clickBlockList.push(event.target);
}
}
triggerVirtualEvent("vmouseout", event);
triggerVirtualEvent("vmouseout", event, flags);
didScroll = false;
startResetTimer();
@ -346,9 +367,8 @@ function getSpecialEventObject(eventType)
// Expose our custom events to the jQuery bind/unbind mechanism.
var vevents = "vmouseover vmousedown vmousemove vmouseup vclick vmouseout vmousecancel".split(" ");
for (var i = 0; i < vevents.length; i++){
$.event.special[vevents[i]] = getSpecialEventObject(vevents[i]);
for (var i = 0; i < virtualEventNames.length; i++){
$.event.special[virtualEventNames[i]] = getSpecialEventObject(virtualEventNames[i]);
}
// Add a capture click handler to block clicks.