1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* Copyright (C) 2016 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.
*/
#include "config.h"
#include "IdChangeInvalidation.h"
#include "DocumentRuleSets.h"
#include "ElementChildIterator.h"
#include "ShadowRoot.h"
#include "StyleResolver.h"
#include "StyleScope.h"
namespace WebCore {
namespace Style {
static bool mayBeAffectedByHostRules(const Element& element, const AtomicString& changedId)
{
auto* shadowRoot = element.shadowRoot();
if (!shadowRoot)
return false;
auto& shadowRuleSets = shadowRoot->styleScope().resolver().ruleSets();
if (shadowRuleSets.authorStyle().hostPseudoClassRules().isEmpty())
return false;
return shadowRuleSets.features().idsInRules.contains(changedId);
}
static bool mayBeAffectedBySlottedRules(const Element& element, const AtomicString& changedId)
{
for (auto* shadowRoot : assignedShadowRootsIfSlotted(element)) {
auto& ruleSets = shadowRoot->styleScope().resolver().ruleSets();
if (ruleSets.authorStyle().slottedPseudoElementRules().isEmpty())
continue;
if (ruleSets.features().idsInRules.contains(changedId))
return true;
}
return false;
}
void IdChangeInvalidation::invalidateStyle(const AtomicString& changedId)
{
if (changedId.isEmpty())
return;
auto& ruleSets = m_element.styleResolver().ruleSets();
bool mayAffectStyle = ruleSets.features().idsInRules.contains(changedId)
|| mayBeAffectedByHostRules(m_element, changedId)
|| mayBeAffectedBySlottedRules(m_element, changedId);
if (!mayAffectStyle)
return;
if (m_element.shadowRoot() && ruleSets.authorStyle().hasShadowPseudoElementRules()) {
m_element.invalidateStyleForSubtree();
return;
}
m_element.invalidateStyle();
// This could be easily optimized for fine-grained descendant invalidation similar to ClassChangeInvalidation.
// However using ids for dynamic styling is rare and this is probably not worth the memory cost of the required data structures.
bool mayAffectDescendantStyle = ruleSets.features().idsMatchingAncestorsInRules.contains(changedId);
if (mayAffectDescendantStyle)
m_element.invalidateStyleForSubtree();
else
m_element.invalidateStyle();
}
}
}
|
