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/*
* Copyright (C) 2016-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "HTMLSlotElement.h"
#include "ShadowRoot.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include "StyleScopeRuleSets.h"
namespace WebCore {
namespace Style {
template <typename TraverseFunction>
inline void traverseRuleFeaturesInShadowTree(Element& element, TraverseFunction&& function)
{
if (!element.shadowRoot())
return;
auto& shadowRuleSets = element.shadowRoot()->styleScope().resolver().ruleSets();
bool hasHostPseudoClassRulesMatchingInShadowTree = false;
bool hasHostPseudoClassRule = shadowRuleSets.hasMatchingUserOrAuthorStyle([&] (auto& style) {
hasHostPseudoClassRulesMatchingInShadowTree = style.hasHostPseudoClassRulesMatchingInShadowTree();
return !style.hostPseudoClassRules().isEmpty();
});
if (!hasHostPseudoClassRule && !hasHostPseudoClassRulesMatchingInShadowTree)
return;
function(shadowRuleSets.features(), hasHostPseudoClassRulesMatchingInShadowTree);
}
template <typename TraverseFunction>
inline void traverseRuleFeaturesForSlotted(Element& element, TraverseFunction&& function)
{
auto assignedShadowRoots = assignedShadowRootsIfSlotted(element);
for (auto& assignedShadowRoot : assignedShadowRoots) {
auto& ruleSets = assignedShadowRoot->styleScope().resolver().ruleSets();
if (!ruleSets.hasMatchingUserOrAuthorStyle([] (auto& style) { return !style.slottedPseudoElementRules().isEmpty(); }))
continue;
function(ruleSets.features(), false);
}
}
template <typename TraverseFunction>
inline void traverseRuleFeatures(Element& element, TraverseFunction&& function)
{
auto& ruleSets = element.styleResolver().ruleSets();
auto mayAffectShadowTree = [&] {
if (element.shadowRoot() && element.shadowRoot()->isUserAgentShadowRoot()) {
if (ruleSets.hasMatchingUserOrAuthorStyle([] (auto& style) { return style.hasShadowPseudoElementRules(); }))
return true;
#if ENABLE(VIDEO)
if (element.isMediaElement() && ruleSets.hasMatchingUserOrAuthorStyle([] (auto& style) { return !style.cuePseudoRules().isEmpty(); }))
return true;
#endif
}
if (is<HTMLSlotElement>(element) && ruleSets.hasMatchingUserOrAuthorStyle([] (auto& style) { return !style.slottedPseudoElementRules().isEmpty(); }))
return true;
return false;
};
function(ruleSets.features(), mayAffectShadowTree());
traverseRuleFeaturesInShadowTree(element, function);
traverseRuleFeaturesForSlotted(element, function);
// Ensure that the containing tree resolver also exists so it doesn't get created in the middle of invalidation.
if (element.isInShadowTree() && element.containingShadowRoot()) {
auto& host = *element.containingShadowRoot()->host();
if (host.isConnected())
Style::Scope::forNode(host).resolver();
}
}
}
}
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