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Optimise getStateQualifier()

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Another fix for #1864, this time we’re caching state qualifiers as they
are expensive to compute.
This commit is contained in:
Jermolene
2015-07-06 11:23:12 +01:00
parent c6e48ebc2d
commit 848a7f4e74
1 changed files with 14 additions and 7 deletions
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21
core/modules/widgets/widget.js
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@@ -195,16 +195,23 @@ Widget.prototype.hasVariable = function(name,value) {
Construct a qualifying string based on a hash of concatenating the values of a given variable in the parent chain
*/
Widget.prototype.getStateQualifier = function(name) {
this.qualifiers = this.qualifiers || Object.create(null);
name = name || "transclusion";
var output = [],
node = this;
while(node && node.parentWidget) {
if($tw.utils.hop(node.parentWidget.variables,name)) {
output.push(node.getVariable(name));
if(this.qualifiers[name]) {
return this.qualifiers[name];
} else {
var output = [],
node = this;
while(node && node.parentWidget) {
if($tw.utils.hop(node.parentWidget.variables,name)) {
output.push(node.getVariable(name));
}
node = node.parentWidget;
}
node = node.parentWidget;
var value = $tw.utils.hashString(output.join(""));
this.qualifiers[name] = value;
return value;
}
return $tw.utils.hashString(output.join(""));
};
/*