CSSRule* ElementRuleCollector::findStyleRule(CSSRuleCollection* cssRules,
StyleRule* styleRule) {
if (!cssRules)
return nullptr;
CSSRule* result = 0;
for (unsigned i = 0; i < cssRules->length() && !result; ++i) {
CSSRule* cssRule = cssRules->item(i);
CSSRule::Type cssRuleType = cssRule->type();
if (cssRuleType == CSSRule::kStyleRule) {
CSSStyleRule* cssStyleRule = toCSSStyleRule(cssRule);
if (cssStyleRule->styleRule() == styleRule)
result = cssRule;
} else if (cssRuleType == CSSRule::kImportRule) {
CSSImportRule* cssImportRule = toCSSImportRule(cssRule);
result = findStyleRule(cssImportRule->styleSheet(), styleRule);
} else {
result = findStyleRule(cssRule->cssRules(), styleRule);
}
}
return result;
}
CSSRule* ElementRuleCollector::findStyleRule(CSSRuleCollection* cssRules, StyleRule* styleRule)
{
if (!cssRules)
return 0;
CSSRule* result = 0;
for (unsigned i = 0; i < cssRules->length() && !result; ++i) {
CSSRule* cssRule = cssRules->item(i);
CSSRule::Type cssRuleType = cssRule->type();
if (cssRuleType == CSSRule::STYLE_RULE) {
CSSStyleRule* cssStyleRule = toCSSStyleRule(cssRule);
if (cssStyleRule->styleRule() == styleRule)
result = cssRule;
} else if (cssRuleType == CSSRule::IMPORT_RULE) {
CSSImportRule* cssImportRule = toCSSImportRule(cssRule);
result = findStyleRule(cssImportRule->styleSheet(), styleRule);
} else {
result = findStyleRule(nestedRuleList(cssRule), styleRule);
}
}
return result;
}
void ElementRuleCollector::appendCSSOMWrapperForRule(CSSStyleSheet* parentStyleSheet, StyleRule* rule)
{
// |parentStyleSheet| is 0 if and only if the |rule| is coming from User Agent. In this case,
// it is safe to create CSSOM wrappers without parentStyleSheets as they will be used only
// by inspector which will not try to edit them.
RefPtrWillBeRawPtr<CSSRule> cssRule = nullptr;
if (parentStyleSheet)
cssRule = findStyleRule(parentStyleSheet, rule);
else
cssRule = rule->createCSSOMWrapper();
ASSERT(!parentStyleSheet || cssRule);
ensureRuleList()->rules().append(cssRule);
}
