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Merge pull request #3279 from nazar-pc/case-convertion-performance-improvement

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Improved performance of Polymer.CaseMap.* functions
This commit is contained in:
Daniel Freedman 2016-02-05 16:48:15 -08:00
commit 2586ede5ac
1 changed files with 12 additions and 20 deletions
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32
src/lib/case-map.html
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@ -12,32 +12,24 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
Polymer.CaseMap = {
_caseMap: {},
_rx: {
dashToCamel: /-[a-z]/g,
camelToDash: /([A-Z])/g
},
dashToCamelCase: function(dash) {
var mapped = Polymer.CaseMap._caseMap[dash];
if (mapped) {
return mapped;
}
// TODO(sjmiles): is rejection test actually helping perf?
if (dash.indexOf('-') < 0) {
return Polymer.CaseMap._caseMap[dash] = dash;
}
return Polymer.CaseMap._caseMap[dash] = dash.replace(/-([a-z])/g,
function(m) {
return m[1].toUpperCase();
}
return this._caseMap[dash] || (
this._caseMap[dash] = dash.indexOf('-') < 0 ? dash : dash.replace(this._rx.dashToCamel,
function(m) {
return m[1].toUpperCase();
}
)
);
},
camelToDashCase: function(camel) {
var mapped = Polymer.CaseMap._caseMap[camel];
if (mapped) {
return mapped;
}
return Polymer.CaseMap._caseMap[camel] = camel.replace(/([a-z][A-Z])/g,
function (g) {
return g[0] + '-' + g[1].toLowerCase()
}
return this._caseMap[camel] || (
this._caseMap[camel] = camel.replace(this._rx.camelToDash, '-$1').toLowerCase()
);
}