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Filter only computed properties that have some CSS rule associated #51

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Filter only computed properties that have some CSS rule associated #51

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34 changes: 33 additions & 1 deletion js/tools/Snapshooter.js
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,25 @@ function Snapshooter(root) {
return ':snappysnippet_prefix:' + node.tagName + '_' + idCounter++;
}

function findMatchedProperties(el) {
var sheets = document.styleSheets, ret = {};
el.matches = el.matches || el.webkitMatchesSelector || el.mozMatchesSelector
|| el.msMatchesSelector || el.oMatchesSelector;
for (var i in sheets) {
var rules = sheets[i].rules || sheets[i].cssRules;
for (var r in rules) {
if (el.matches(rules[r].selectorText)) {
var rule_style = rules[r].style;
for (var i = rule_style.length -1 ; i >=0; i--) {
ret[rule_style[i]] = true;
}
}
}
}
return ret;
}


function dumpCSS(node, pseudoElement) {
var styles;

Expand All @@ -124,7 +143,20 @@ function Snapshooter(root) {
}
}

return styleDeclarationToSimpleObject(styles);
var style_object = styleDeclarationToSimpleObject(styles);
var filtered_properties = findMatchedProperties(node);

var properties = Object.keys(style_object)

for (var i = properties.length-1; i >=0; i--) {
var property_name = properties[i];

if (!filtered_properties.hasOwnProperty(property_name)) {
delete style_object[property_name];
}
}

return style_object
}

function cssObjectForElement(element, omitPseudoElements) {
Expand Down