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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* internal abstract interface for containers (roughly origins within
* the CSS cascade) that provide style rules matching an element or
* pseudo-element
*/
#ifndef nsIStyleRuleProcessor_h___
#define nsIStyleRuleProcessor_h___
#include "mozilla/MemoryReporting.h"
#include "nsISupports.h"
#include "nsChangeHint.h"
struct RuleProcessorData;
struct ElementRuleProcessorData;
struct PseudoElementRuleProcessorData;
struct AnonBoxRuleProcessorData;
#ifdef MOZ_XUL
struct XULTreeRuleProcessorData;
#endif
struct StateRuleProcessorData;
struct PseudoElementStateRuleProcessorData;
struct AttributeRuleProcessorData;
class nsPresContext;
// IID for the nsIStyleRuleProcessor interface
// {c1d6001e-4fcb-4c40-bce1-5eba80bfd8f3}
#define NS_ISTYLE_RULE_PROCESSOR_IID \
{ 0xc1d6001e, 0x4fcb, 0x4c40, \
{0xbc, 0xe1, 0x5e, 0xba, 0x80, 0xbf, 0xd8, 0xf3} }
/* The style rule processor interface is a mechanism to separate the matching
* of style rules from style sheet instances.
* Simple style sheets can and will act as their own processor.
* Sheets where rule ordering interlaces between multiple sheets, will need to
* share a single rule processor between them (CSS sheets do this for cascading order)
*
* @see nsIStyleRule (for significantly more detailed comments)
*/
class nsIStyleRuleProcessor : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISTYLE_RULE_PROCESSOR_IID)
// Shorthand for:
// nsCOMArray<nsIStyleRuleProcessor>::nsCOMArrayEnumFunc
typedef bool (* EnumFunc)(nsIStyleRuleProcessor*, void*);
/**
* Find the |nsIStyleRule|s matching the given content node and
* position the given |nsRuleWalker| at the |nsRuleNode| in the rule
* tree representing that ordered list of rules (with higher
* precedence being farther from the root of the lexicographic tree).
*/
virtual void RulesMatching(ElementRuleProcessorData* aData) = 0;
/**
* Just like the previous |RulesMatching|, except for a given content
* node <em>and pseudo-element</em>.
*/
virtual void RulesMatching(PseudoElementRuleProcessorData* aData) = 0;
/**
* Just like the previous |RulesMatching|, except for a given anonymous box.
*/
virtual void RulesMatching(AnonBoxRuleProcessorData* aData) = 0;
#ifdef MOZ_XUL
/**
* Just like the previous |RulesMatching|, except for a given content
* node <em>and tree pseudo</em>.
*/
virtual void RulesMatching(XULTreeRuleProcessorData* aData) = 0;
#endif
/**
* Return whether style can depend on a change of the given document state.
*
* Document states are defined in nsIDocument.h.
*/
virtual bool
HasDocumentStateDependentStyle(StateRuleProcessorData* aData) = 0;
/**
* Return how (as described by nsRestyleHint) style can depend on a
* change of the given content state on the given content node. This
* test is used for optimization only, and may err on the side of
* reporting more dependencies than really exist.
*
* Event states are defined in mozilla/EventStates.h.
*/
virtual nsRestyleHint
HasStateDependentStyle(StateRuleProcessorData* aData) = 0;
virtual nsRestyleHint
HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) = 0;
/**
* This method will be called twice for every attribute change.
* During the first call, aData->mAttrHasChanged will be false and
* the attribute change will not have happened yet. During the
* second call, aData->mAttrHasChanged will be true and the
* change will have already happened. The bitwise OR of the two
* return values must describe the style changes that are needed due
* to the attribute change. It's up to the rule processor
* implementation to decide how to split the bits up amongst the two
* return values. For example, it could return the bits needed by
* rules that might stop matching the node from the first call and
* the bits needed by rules that might have started matching the
* node from the second call. This test is used for optimization
* only, and may err on the side of reporting more dependencies than
* really exist.
*/
virtual nsRestyleHint HasAttributeDependentStyle(
AttributeRuleProcessorData* aData,
mozilla::RestyleHintData& aRestyleHintDataResult) = 0;
/**
* Do any processing that needs to happen as a result of a change in
* the characteristics of the medium, and return whether this rule
* processor's rules have changed (e.g., because of media queries).
*/
virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) = 0;
/**
* Report the size of this style rule processor to about:memory. A
* processor may return 0.
*/
virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const = 0;
virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIStyleRuleProcessor,
NS_ISTYLE_RULE_PROCESSOR_IID)
#endif /* nsIStyleRuleProcessor_h___ */
|
