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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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120 if (state == InPerformLayout) | 120 if (state == InPerformLayout) |
121 return true; | 121 return true; |
122 // We can redundant arrive in the layout clean state. This situation | 122 // We can redundant arrive in the layout clean state. This situation |
123 // can happen when we call layout recursively and we unwind the stack. | 123 // can happen when we call layout recursively and we unwind the stack. |
124 if (state == LayoutClean) | 124 if (state == LayoutClean) |
125 return true; | 125 return true; |
126 if (state == StyleClean) | 126 if (state == StyleClean) |
127 return true; | 127 return true; |
128 return false; | 128 return false; |
129 } | 129 } |
130 if (m_state == CompositingClean) { | |
131 if (state == InStyleRecalc) | |
132 return true; | |
133 if (state == InCompositingUpdate) | |
134 return true; | |
135 if (state == InPaintInvalidation) | |
136 return true; | |
137 return false; | |
138 } | |
139 if (m_state == InPaintInvalidation) { | 130 if (m_state == InPaintInvalidation) { |
140 if (state == PaintInvalidationClean) | 131 if (state == PaintInvalidationClean) |
141 return true; | 132 return true; |
142 return false; | 133 return false; |
143 } | 134 } |
144 if (m_state == PaintInvalidationClean) { | 135 if (m_state == PaintInvalidationClean) { |
145 if (state == InStyleRecalc) | 136 if (state == InStyleRecalc) |
146 return true; | 137 return true; |
147 if (state == InPreLayout) | 138 if (state == InPreLayout) |
148 return true; | 139 return true; |
149 if (state == InCompositingUpdate) | |
150 return true; | |
151 return false; | 140 return false; |
152 } | 141 } |
153 return false; | 142 return false; |
154 } | 143 } |
155 | 144 |
156 bool DocumentLifecycle::canRewindTo(State state) const | 145 bool DocumentLifecycle::canRewindTo(State state) const |
157 { | 146 { |
158 // This transition is bogus, but we've whitelisted it anyway. | 147 // This transition is bogus, but we've whitelisted it anyway. |
159 if (s_deprecatedTransitionStack && m_state == s_deprecatedTransitionStack->f
rom() && state == s_deprecatedTransitionStack->to()) | 148 if (s_deprecatedTransitionStack && m_state == s_deprecatedTransitionStack->f
rom() && state == s_deprecatedTransitionStack->to()) |
160 return true; | 149 return true; |
161 return m_state == StyleClean || m_state == AfterPerformLayout || m_state ==
LayoutClean || m_state == CompositingClean || m_state == PaintInvalidationClean; | 150 return m_state == StyleClean || m_state == AfterPerformLayout || m_state ==
LayoutClean || m_state == PaintInvalidationClean; |
162 } | 151 } |
163 | 152 |
164 #endif | 153 #endif |
165 | 154 |
166 void DocumentLifecycle::advanceTo(State state) | 155 void DocumentLifecycle::advanceTo(State state) |
167 { | 156 { |
168 ASSERT(canAdvanceTo(state)); | 157 ASSERT(canAdvanceTo(state)); |
169 m_state = state; | 158 m_state = state; |
170 } | 159 } |
171 | 160 |
172 void DocumentLifecycle::ensureStateAtMost(State state) | 161 void DocumentLifecycle::ensureStateAtMost(State state) |
173 { | 162 { |
174 ASSERT(state == VisualUpdatePending || state == StyleClean || state == Layou
tClean); | 163 ASSERT(state == VisualUpdatePending || state == StyleClean || state == Layou
tClean); |
175 if (m_state <= state) | 164 if (m_state <= state) |
176 return; | 165 return; |
177 ASSERT(canRewindTo(state)); | 166 ASSERT(canRewindTo(state)); |
178 m_state = state; | 167 m_state = state; |
179 } | 168 } |
180 | 169 |
181 } | 170 } |
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