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Issue #2490 - Part 3: Give CSS rules a PreCreate hook so we can safely wrappercache them.

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This commit is contained in:
Moonchild 2024-03-30 11:38:44 +01:00 • committed by roytam1
commit e510cc84af
2 changed files with 84 additions and 16 deletions
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77
dom/base/nsDOMClassInfo.cpp
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@ -189,14 +189,18 @@ static nsDOMClassInfoData sClassInfoData[] = {
// Misc Core related classes
// CSS classes
NS_DEFINE_CLASSINFO_DATA(CSSStyleRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
NS_DEFINE_CLASSINFO_DATA(CSSImportRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
NS_DEFINE_CLASSINFO_DATA(CSSMediaRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
NS_DEFINE_CLASSINFO_DATA(CSSNameSpaceRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
NS_DEFINE_CLASSINFO_DATA(CSSStyleRule, nsCSSRuleSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSImportRule, nsCSSRuleSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSMediaRule, nsCSSRuleSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSNameSpaceRule, nsCSSRuleSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
// XUL classes
#ifdef MOZ_XUL
@ -221,13 +225,16 @@ static nsDOMClassInfoData sClassInfoData[] = {
#endif
NS_DEFINE_CLASSINFO_DATA(CSSMozDocumentRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSSupportsRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSFontFaceRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(ContentFrameMessageManager,
nsMessageManagerSH<nsEventTargetSH>,
@ -246,18 +253,23 @@ static nsDOMClassInfoData sClassInfoData[] = {
NS_DEFINE_CLASSINFO_DATA(CSSKeyframeRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSKeyframesRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSCounterStyleRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSPageRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CLASSINFO_DATA(CSSFontFeatureValuesRule, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
DOM_DEFAULT_SCRIPTABLE_FLAGS |
nsIXPCScriptable::WANT_PRECREATE)
NS_DEFINE_CHROME_XBL_CLASSINFO_DATA(XULControlElement, nsDOMGenericSH,
DOM_DEFAULT_SCRIPTABLE_FLAGS)
@ -1982,6 +1994,39 @@ nsEventTargetSH::PreserveWrapper(nsISupports *aNative)
target->PreserveWrapper(aNative);
}
// CSS rule helper
NS_IMETHODIMP
nsCSSRuleSH::PreCreate(nsISupports *nativeObj, JSContext *cx,
JSObject *aGlobalObj, JSObject **parentObj)
{
JS::Rooted<JSObject*> globalObj(cx, aGlobalObj);
nsCOMPtr<nsIDOMCSSRule> rule = do_QueryInterface(nativeObj);
if (!rule) {
return NS_ERROR_UNEXPECTED;
}
css::Rule* cssRule = rule->GetCSSRule();
if (!cssRule) {
// A DOMCSSStyleRule whose actual underlying rule has gone away. There
// isn't much a caller can do with this thing anyway, and only chrome code
// can get its hands on it to start with, so just wrap in the current
// global.
*parentObj = globalObj;
return NS_OK;
}
nsIDocument* doc = cssRule->GetDocument();
if (!doc) {
*parentObj = globalObj;
return NS_OK;
}
nsIGlobalObject* global = doc->GetScopeObject();
if (!global) {
return NS_ERROR_UNEXPECTED;
}
*parentObj = global->GetGlobalJSObject();
return *parentObj ? NS_OK : NS_ERROR_FAILURE;
}
// nsIDOMEventListener::HandleEvent() 'this' converter helper
NS_INTERFACE_MAP_BEGIN(nsEventListenerThisTranslator)