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 #include "platform/transforms/AffineTransform.h"
  13
  14 namespace blink {
  15
  16 MutableStylePropertySet* SVGElementRareData::ensureAnimatedSMILStyleProperties()
  17 {
  18     if (!m_animatedSMILStyleProperties)
  19         m_animatedSMILStyleProperties = MutableStylePropertySet::create(SVGAttributeMode);
  20     return m_animatedSMILStyleProperties.get();
  21 }
  22
  23 RenderStyle* SVGElementRareData::overrideComputedStyle(Element* element, RenderStyle* parentStyle)
  24 {
  25     ASSERT(element);
  26     if (!m_useOverrideComputedStyle)
  27         return 0;
  28     if (!m_overrideComputedStyle || m_needsOverrideComputedStyleUpdate) {
  29         // 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.
  30         m_overrideComputedStyle = element->document().ensureStyleResolver().styleForElement(element, parentStyle, DisallowStyleSharing, MatchAllRulesExcludingSMIL);
  31         m_needsOverrideComputedStyleUpdate = false;
  32     }
  33     ASSERT(m_overrideComputedStyle);
  34     return m_overrideComputedStyle.get();
  35 }
  36
  37 void SVGElementRareData::trace(Visitor* visitor)
  38 {
  39 #if ENABLE(OILPAN)
  40     visitor->trace(m_outgoingReferences);
  41     visitor->trace(m_incomingReferences);
  42     visitor->trace(m_animatedSMILStyleProperties);
  43     visitor->trace(m_elementInstances);
  44     visitor->trace(m_correspondingElement);
  45     visitor->trace(m_owner);
  46     visitor->registerWeakMembers<SVGElementRareData, &SVGElementRareData::processWeakMembers>(this);
  47 #endif
  48 }
  49
  50 void SVGElementRareData::processWeakMembers(Visitor* visitor)
  51 {
  52 #if ENABLE(OILPAN)
  53         ASSERT(m_owner);
  54         if (!visitor->isAlive(m_cursorElement))
  55             m_cursorElement = nullptr;
  56
  57         if (!visitor->isAlive(m_cursorImageValue)) {
  58             // The owning SVGElement is still alive and if it is pointing to an SVGCursorElement
  59             // we unregister it when the CSSCursorImageValue dies.
  60             if (m_cursorElement) {
  61                 m_cursorElement->removeReferencedElement(m_owner);
  62                 m_cursorElement = nullptr;
  63             }
  64             m_cursorImageValue = nullptr;
  65         }
  66         ASSERT(!m_cursorElement || visitor->isAlive(m_cursorElement));
  67         ASSERT(!m_cursorImageValue || visitor->isAlive(m_cursorImageValue));
  68 #endif
  69 }
  70
  71 AffineTransform* SVGElementRareData::animateMotionTransform()
  72 {
  73     if (!m_animateMotionTransform)
  74         m_animateMotionTransform = adoptPtr(new AffineTransform);
  75     return m_animateMotionTransform.get();
  76 }
  77
  78 }