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Bug 497543 - Part 5 - Don't capture thumbnails while the page is scrolled; r=dietrich

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This commit is contained in:
Tim Taubert 2012-01-25 22:47:39 +01:00
parent ac0a33bc78
commit f3cecae283
1 changed files with 17 additions and 6 deletions
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23
browser/base/content/browser-thumbnails.js
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@ -51,15 +51,16 @@ let gBrowserThumbnails = {
handleEvent: function Thumbnails_handleEvent(aEvent) {
switch (aEvent.type) {
case "scroll":
let browser = aEvent.currentTarget;
if (this._timeouts.has(browser))
this._delayedCapture(browser);
break;
case "TabSelect":
this._delayedCapture(aEvent.target.linkedBrowser);
break;
case "TabClose": {
let browser = aEvent.target.linkedBrowser;
if (this._timeouts.has(browser)) {
clearTimeout(this._timeouts.get(browser));
this._timeouts.delete(browser);
}
this._clearTimeout(aEvent.target.linkedBrowser);
break;
}
}
@ -85,9 +86,11 @@ let gBrowserThumbnails = {
_delayedCapture: function Thumbnails_delayedCapture(aBrowser) {
if (this._timeouts.has(aBrowser))
clearTimeout(this._timeouts.get(aBrowser));
else
aBrowser.addEventListener("scroll", this, true);
let timeout = setTimeout(function () {
this._timeouts.delete(aBrowser);
this._clearTimeout(aBrowser);
this._capture(aBrowser);
}.bind(this), this._captureDelayMS);
@ -115,5 +118,13 @@ let gBrowserThumbnails = {
// Not a http channel, we just assume a success status code.
return true;
}
},
_clearTimeout: function Thumbnails_clearTimeout(aBrowser) {
if (this._timeouts.has(aBrowser)) {
aBrowser.removeEventListener("scroll", this, false);
clearTimeout(this._timeouts.get(aBrowser));
this._timeouts.delete(aBrowser);
}
}
};