StyleRuleBase* StyleRuleBase::copy() const {
switch (type()) {
case Style:
return toStyleRule(this)->copy();
case Page:
return toStyleRulePage(this)->copy();
case FontFace:
return toStyleRuleFontFace(this)->copy();
case Media:
return toStyleRuleMedia(this)->copy();
case Supports:
return toStyleRuleSupports(this)->copy();
case Import:
// FIXME: Copy import rules.
NOTREACHED();
return nullptr;
case Keyframes:
return toStyleRuleKeyframes(this)->copy();
case Viewport:
return toStyleRuleViewport(this)->copy();
case Namespace:
return toStyleRuleNamespace(this)->copy();
case Charset:
case Keyframe:
ASSERT_NOT_REACHED();
return nullptr;
}
ASSERT_NOT_REACHED();
return nullptr;
}
bool StyleSheetContents::wrapperInsertRule(StyleRuleBase* rule,
unsigned index) {
ASSERT(m_isMutable);
SECURITY_DCHECK(index <= ruleCount());
if (index < m_importRules.size() ||
(index == m_importRules.size() && rule->isImportRule())) {
// Inserting non-import rule before @import is not allowed.
if (!rule->isImportRule())
return false;
StyleRuleImport* importRule = toStyleRuleImport(rule);
if (importRule->mediaQueries())
setHasMediaQueries();
m_importRules.insert(index, importRule);
m_importRules[index]->setParentStyleSheet(this);
m_importRules[index]->requestStyleSheet();
// FIXME: Stylesheet doesn't actually change meaningfully before the
// imported sheets are loaded.
return true;
}
// Inserting @import rule after a non-import rule is not allowed.
if (rule->isImportRule())
return false;
index -= m_importRules.size();
if (index < m_namespaceRules.size() ||
(index == m_namespaceRules.size() && rule->isNamespaceRule())) {
// Inserting non-namespace rules other than import rule before @namespace is
// not allowed.
if (!rule->isNamespaceRule())
return false;
// Inserting @namespace rule when rules other than import/namespace/charset
// are present is not allowed.
if (!m_childRules.isEmpty())
return false;
StyleRuleNamespace* namespaceRule = toStyleRuleNamespace(rule);
m_namespaceRules.insert(index, namespaceRule);
// For now to be compatible with IE and Firefox if namespace rule with same
// prefix is added irrespective of adding the rule at any index, last added
// rule's value is considered.
// TODO ([email protected]): As per spec last valid rule should be
// considered, which means if namespace rule is added in the middle of
// existing namespace rules, rule which comes later in rule list with same
// prefix needs to be considered.
parserAddNamespace(namespaceRule->prefix(), namespaceRule->uri());
return true;
}
if (rule->isNamespaceRule())
return false;
index -= m_namespaceRules.size();
m_childRules.insert(index, rule);
return true;
}
void StyleSheetContents::parserAppendRule(StyleRuleBase* rule) {
if (rule->isImportRule()) {
// Parser enforces that @import rules come before anything else
ASSERT(m_childRules.isEmpty());
StyleRuleImport* importRule = toStyleRuleImport(rule);
if (importRule->mediaQueries())
setHasMediaQueries();
m_importRules.append(importRule);
m_importRules.last()->setParentStyleSheet(this);
m_importRules.last()->requestStyleSheet();
return;
}
if (rule->isNamespaceRule()) {
// Parser enforces that @namespace rules come before all rules other than
// import/charset rules
ASSERT(m_childRules.isEmpty());
StyleRuleNamespace& namespaceRule = toStyleRuleNamespace(*rule);
parserAddNamespace(namespaceRule.prefix(), namespaceRule.uri());
m_namespaceRules.append(&namespaceRule);
return;
}
m_childRules.append(rule);
}
CSSRule* StyleRuleBase::createCSSOMWrapper(CSSStyleSheet* parentSheet,
CSSRule* parentRule) const {
CSSRule* rule = nullptr;
StyleRuleBase* self = const_cast<StyleRuleBase*>(this);
switch (type()) {
case Style:
rule = CSSStyleRule::create(toStyleRule(self), parentSheet);
break;
case Page:
rule = CSSPageRule::create(toStyleRulePage(self), parentSheet);
break;
case FontFace:
rule = CSSFontFaceRule::create(toStyleRuleFontFace(self), parentSheet);
break;
case Media:
rule = CSSMediaRule::create(toStyleRuleMedia(self), parentSheet);
break;
case Supports:
rule = CSSSupportsRule::create(toStyleRuleSupports(self), parentSheet);
break;
case Import:
rule = CSSImportRule::create(toStyleRuleImport(self), parentSheet);
break;
case Keyframes:
rule = CSSKeyframesRule::create(toStyleRuleKeyframes(self), parentSheet);
break;
case Namespace:
rule = CSSNamespaceRule::create(toStyleRuleNamespace(self), parentSheet);
break;
case Viewport:
rule = CSSViewportRule::create(toStyleRuleViewport(self), parentSheet);
break;
case Keyframe:
case Charset:
ASSERT_NOT_REACHED();
return nullptr;
}
if (parentRule)
rule->setParentRule(parentRule);
return rule;
}
void StyleRuleBase::finalizeGarbageCollectedObject()
{
switch (type()) {
case Charset:
toStyleRuleCharset(this)->~StyleRuleCharset();
return;
case Style:
toStyleRule(this)->~StyleRule();
return;
case Page:
toStyleRulePage(this)->~StyleRulePage();
return;
case FontFace:
toStyleRuleFontFace(this)->~StyleRuleFontFace();
return;
case Media:
toStyleRuleMedia(this)->~StyleRuleMedia();
return;
case Supports:
toStyleRuleSupports(this)->~StyleRuleSupports();
return;
case Import:
toStyleRuleImport(this)->~StyleRuleImport();
return;
case Keyframes:
toStyleRuleKeyframes(this)->~StyleRuleKeyframes();
return;
case Keyframe:
toStyleRuleKeyframe(this)->~StyleRuleKeyframe();
return;
case Namespace:
toStyleRuleNamespace(this)->~StyleRuleNamespace();
return;
case Viewport:
toStyleRuleViewport(this)->~StyleRuleViewport();
return;
case Unknown:
return;
}
ASSERT_NOT_REACHED();
}
void StyleRuleBase::destroy()
{
switch (type()) {
case Charset:
delete toStyleRuleCharset(this);
return;
case Style:
delete toStyleRule(this);
return;
case Page:
delete toStyleRulePage(this);
return;
case FontFace:
delete toStyleRuleFontFace(this);
return;
case Media:
delete toStyleRuleMedia(this);
return;
case Supports:
delete toStyleRuleSupports(this);
return;
case Import:
delete toStyleRuleImport(this);
return;
case Keyframes:
delete toStyleRuleKeyframes(this);
return;
case Keyframe:
delete toStyleRuleKeyframe(this);
return;
case Namespace:
delete toStyleRuleNamespace(this);
return;
case Viewport:
delete toStyleRuleViewport(this);
return;
case Unknown:
return;
}
ASSERT_NOT_REACHED();
}
