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[WO-294] optimize mail-list.loadVisibleBodies

This commit is contained in:
Tankred Hase 2014-03-25 15:19:47 +01:00
parent d3387ea15c
commit 483ad5210e
1 changed files with 8 additions and 2 deletions
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10
src/js/controller/mail-list.js
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@ -406,11 +406,11 @@ define(function(require) {
top = listBorder.top,
bottom = listBorder.bottom,
listItems = listEl.children[0].children,
i = listItems.length,
inViewport = false,
listItem, message,
isPartiallyVisibleTop, isPartiallyVisibleBottom, isVisible;
while (i--) {
for (var i = 0, len = listItems.length; i < len; i++) {
// the n-th list item (the dom representation of an email) corresponds to
// the n-th message model in the filteredMessages array
listItem = listItems.item(i).getBoundingClientRect();
@ -421,7 +421,13 @@ define(function(require) {
isVisible = listItem.top >= top && listItem.bottom <= bottom; // the list item is visible as a whole
if (isPartiallyVisibleTop || isVisible || isPartiallyVisibleBottom) {
// we are now iterating over visible elements
inViewport = true;
// load mail body of visible
scope.getBody(message);
} else if (inViewport) {
// we are leaving the viewport, so stop iterating over the items
break;
}
}
};