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Bug 482703 - less setAttribute()ing(speed up panning)

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This commit is contained in:
Taras Glek 2009-03-13 06:44:51 -07:00
parent 3dee8b150d
commit decd66cf1a
1 changed files with 14 additions and 3 deletions
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17
mobile/chrome/content/WidgetStack.js
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@ -1293,9 +1293,20 @@ WidgetStack.prototype = {
// presumably the caller is managing those directly for now.
if (state.frozen)
return;
state.widget.setAttribute("left", state.rect.x + state.offsetLeft);
state.widget.setAttribute("top", state.rect.y + state.offsetTop);
let w = state.widget;
let l = state.rect.x + state.offsetLeft;
let t = state.rect.y + state.offsetTop;
//cache left/top to avoid calling setAttribute unnessesarily
if (state._left != l) {
state._left = l;
w.setAttribute("left", l);
}
if (state._top != t) {
state._top = t;
w.setAttribute("top", t);
}
},
// constrain translate of rect by dx dy to bounds; return dx dy that can