src/third_party/WebKit/Source/core/svg/SVGElementRareData.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/svg/SVGElementRareData.h"
   7
   8 #include "core/css/CSSCursorImageValue.h"
   9 #include "core/css/resolver/StyleResolver.h"
  10 #include "core/dom/Document.h"
  11 #include "core/svg/SVGCursorElement.h"
  12
  13 namespace blink {
  14
  15 MutableStylePropertySet* SVGElementRareData::ensureAnimatedSMILStyleProperties()
  16 {
  17     if (!m_animatedSMILStyleProperties)
  18         m_animatedSMILStyleProperties = MutableStylePropertySet::create(SVGAttributeMode);
  19     return m_animatedSMILStyleProperties.get();
  20 }
  21
  22 RenderStyle* SVGElementRareData::overrideComputedStyle(Element* element, RenderStyle* parentStyle)
  23 {
  24     ASSERT(element);
  25     if (!m_useOverrideComputedStyle)
  26         return 0;
  27     if (!m_overrideComputedStyle || m_needsOverrideComputedStyleUpdate) {
  28         // The style computed here contains no CSS Animations/Transitions or SMIL induced rules - this is needed to compute the "base value" for the SMIL animation sandwhich model.
  29         m_overrideComputedStyle = element->document().ensureStyleResolver().styleForElement(element, parentStyle, DisallowStyleSharing, MatchAllRulesExcludingSMIL);
  30         m_needsOverrideComputedStyleUpdate = false;
  31     }
  32     ASSERT(m_overrideComputedStyle);
  33     return m_overrideComputedStyle.get();
  34 }
  35
  36 void SVGElementRareData::trace(Visitor* visitor)
  37 {
  38 #if ENABLE(OILPAN)
  39     visitor->trace(m_outgoingReferences);
  40     visitor->trace(m_incomingReferences);
  41     visitor->trace(m_animatedSMILStyleProperties);
  42     visitor->trace(m_elementInstances);
  43     visitor->trace(m_correspondingElement);
  44     visitor->trace(m_owner);
  45     visitor->registerWeakMembers<SVGElementRareData, &SVGElementRareData::processWeakMembers>(this);
  46 #endif
  47 }
  48
  49 void SVGElementRareData::processWeakMembers(Visitor* visitor)
  50 {
  51 #if ENABLE(OILPAN)
  52         ASSERT(m_owner);
  53         if (!visitor->isAlive(m_cursorElement))
  54             m_cursorElement = nullptr;
  55
  56         if (!visitor->isAlive(m_cursorImageValue)) {
  57             // The owning SVGElement is still alive and if it is pointing to an SVGCursorElement
  58             // we unregister it when the CSSCursorImageValue dies.
  59             if (m_cursorElement) {
  60                 m_cursorElement->removeReferencedElement(m_owner);
  61                 m_cursorElement = nullptr;
  62             }
  63             m_cursorImageValue = nullptr;
  64         }
  65         ASSERT(!m_cursorElement || visitor->isAlive(m_cursorElement));
  66         ASSERT(!m_cursorImageValue || visitor->isAlive(m_cursorImageValue));
  67 #endif
  68 }
  69
  70
  71 }