1/*
2 * Copyright (C) 2016-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "DocumentRuleSets.h"
29#include "HTMLSlotElement.h"
30#include "ShadowRoot.h"
31#include "StyleResolver.h"
32#include "StyleScope.h"
33
34namespace WebCore {
35namespace Style {
36
37template <typename TraverseFunction>
38inline void traverseRuleFeaturesInShadowTree(Element& element, TraverseFunction&& function)
39{
40 if (!element.shadowRoot())
41 return;
42 auto& shadowRuleSets = element.shadowRoot()->styleScope().resolver().ruleSets();
43 auto& authorStyle = shadowRuleSets.authorStyle();
44 bool hasHostPseudoClassRulesMatchingInShadowTree = authorStyle.hasHostPseudoClassRulesMatchingInShadowTree();
45 if (authorStyle.hostPseudoClassRules().isEmpty() && !hasHostPseudoClassRulesMatchingInShadowTree)
46 return;
47 function(shadowRuleSets.features(), hasHostPseudoClassRulesMatchingInShadowTree);
48}
49
50template <typename TraverseFunction>
51inline void traverseRuleFeaturesForSlotted(Element& element, TraverseFunction&& function)
52{
53 auto assignedShadowRoots = assignedShadowRootsIfSlotted(element);
54 for (auto& assignedShadowRoot : assignedShadowRoots) {
55 auto& ruleSets = assignedShadowRoot->styleScope().resolver().ruleSets();
56 if (ruleSets.authorStyle().slottedPseudoElementRules().isEmpty())
57 continue;
58 function(ruleSets.features(), false);
59 }
60}
61
62template <typename TraverseFunction>
63inline void traverseRuleFeatures(Element& element, TraverseFunction&& function)
64{
65 auto& ruleSets = element.styleResolver().ruleSets();
66
67 auto mayAffectShadowTree = [&] {
68 if (element.shadowRoot() && ruleSets.authorStyle().hasShadowPseudoElementRules())
69 return true;
70 if (is<HTMLSlotElement>(element) && !ruleSets.authorStyle().slottedPseudoElementRules().isEmpty())
71 return true;
72 return false;
73 };
74
75 function(ruleSets.features(), mayAffectShadowTree());
76
77 traverseRuleFeaturesInShadowTree(element, function);
78 traverseRuleFeaturesForSlotted(element, function);
79}
80
81}
82}
83
84