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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/TypeCasts.h>
#include <LibWeb/CSS/CSSImportRule.h>
#include <LibWeb/CSS/CSSMediaRule.h>
#include <LibWeb/CSS/CSSRuleList.h>
#include <LibWeb/CSS/CSSSupportsRule.h>
#include <LibWeb/DOM/ExceptionOr.h>
namespace Web::CSS {
CSSRuleList::CSSRuleList(NonnullRefPtrVector<CSSRule>&& rules)
: m_rules(move(rules))
{
}
CSSRuleList::~CSSRuleList()
{
}
bool CSSRuleList::is_supported_property_index(u32 index) const
{
// The object’s supported property indices are the numbers in the range zero to one less than the number of CSSRule objects represented by the collection.
// If there are no such CSSRule objects, then there are no supported property indices.
return index < m_rules.size();
}
// https://drafts.csswg.org/cssom/#insert-a-css-rule
DOM::ExceptionOr<unsigned> CSSRuleList::insert_a_css_rule(NonnullRefPtr<CSSRule> rule, u32 index)
{
// 1. Set length to the number of items in list.
auto length = m_rules.size();
// 2. If index is greater than length, then throw an IndexSizeError exception.
if (index > length)
return DOM::IndexSizeError::create("CSS rule index out of bounds.");
// NOTE: These steps don't apply since we're receiving a parsed rule.
// 3. Set new rule to the results of performing parse a CSS rule on argument rule.
// 4. If new rule is a syntax error, throw a SyntaxError exception.
// FIXME: 5. If new rule cannot be inserted into list at the zero-index position index due to constraints specified by CSS, then throw a HierarchyRequestError exception. [CSS21]
// FIXME: 6. If new rule is an @namespace at-rule, and list contains anything other than @import at-rules, and @namespace at-rules, throw an InvalidStateError exception.
// 7. Insert new rule into list at the zero-indexed position index.
m_rules.insert(index, move(rule));
// 8. Return index.
return index;
}
// https://drafts.csswg.org/cssom/#remove-a-css-rule
DOM::ExceptionOr<void> CSSRuleList::remove_a_css_rule(u32 index)
{
// 1. Set length to the number of items in list.
auto length = m_rules.size();
// 2. If index is greater than or equal to length, then throw an IndexSizeError exception.
if (index >= length)
return DOM::IndexSizeError::create("CSS rule index out of bounds.");
// 3. Set old rule to the indexth item in list.
auto& old_rule = m_rules[index];
// FIXME: 4. If old rule is an @namespace at-rule, and list contains anything other than @import at-rules, and @namespace at-rules, throw an InvalidStateError exception.
(void)old_rule;
// 5. Remove rule old rule from list at the zero-indexed position index.
m_rules.remove(index);
// FIXME: 6. Set old rule’s parent CSS rule and parent CSS style sheet to null.
return {};
}
void CSSRuleList::for_each_effective_style_rule(Function<void(CSSStyleRule const&)> const& callback) const
{
for (auto& rule : m_rules) {
switch (rule.type()) {
case CSSRule::Type::Style:
callback(verify_cast<CSSStyleRule>(rule));
break;
case CSSRule::Type::Import: {
auto const& import_rule = verify_cast<CSSImportRule>(rule);
if (import_rule.has_import_result())
import_rule.loaded_style_sheet()->for_each_effective_style_rule(callback);
break;
}
case CSSRule::Type::Media:
verify_cast<CSSMediaRule>(rule).for_each_effective_style_rule(callback);
break;
case CSSRule::Type::Supports:
verify_cast<CSSSupportsRule>(rule).for_each_effective_style_rule(callback);
break;
case CSSRule::Type::__Count:
VERIFY_NOT_REACHED();
}
}
}
bool CSSRuleList::for_first_not_loaded_import_rule(Function<void(CSSImportRule&)> const& callback)
{
for (auto& rule : m_rules) {
if (rule.type() == CSSRule::Type::Import) {
auto& import_rule = verify_cast<CSSImportRule>(rule);
if (!import_rule.has_import_result()) {
callback(import_rule);
return true;
}
if (import_rule.loaded_style_sheet()->for_first_not_loaded_import_rule(callback)) {
return true;
}
} else if (rule.type() == CSSRule::Type::Media) {
return verify_cast<CSSMediaRule>(rule).for_first_not_loaded_import_rule(callback);
} else if (rule.type() == CSSRule::Type::Supports) {
return verify_cast<CSSSupportsRule>(rule).for_first_not_loaded_import_rule(callback);
}
}
return false;
}
void CSSRuleList::evaluate_media_queries(DOM::Window const& window)
{
for (auto& rule : m_rules) {
switch (rule.type()) {
case CSSRule::Type::Style:
break;
case CSSRule::Type::Import: {
auto& import_rule = verify_cast<CSSImportRule>(rule);
if (import_rule.has_import_result())
import_rule.loaded_style_sheet()->evaluate_media_queries(window);
break;
}
case CSSRule::Type::Media: {
auto& media_rule = verify_cast<CSSMediaRule>(rule);
if (media_rule.evaluate(window))
media_rule.css_rules().evaluate_media_queries(window);
break;
}
case CSSRule::Type::Supports: {
auto& supports_rule = verify_cast<CSSSupportsRule>(rule);
if (supports_rule.condition_matches())
supports_rule.css_rules().evaluate_media_queries(window);
break;
}
case CSSRule::Type::__Count:
VERIFY_NOT_REACHED();
}
}
}
}
|
