third_party/WebKit/Source/core/dom/StyleChangeReason.h

   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 #ifndef StyleChangeReason_h
   6 #define StyleChangeReason_h
   7
   8 #include "core/dom/QualifiedName.h"
   9 #include "wtf/NullPtr.h"
  10 #include "wtf/PassRefPtr.h"
  11 #include "wtf/text/AtomicString.h"
  12 #include "wtf/text/WTFString.h"
  13
  14 namespace blink {
  15
  16 class QualifiedName;
  17
  18 namespace StyleChangeReason {
  19 extern const char ActiveStylesheetsUpdate[];
  20 extern const char Animation[];
  21 extern const char Attribute[];
  22 extern const char CompositorProxy[];
  23 extern const char ControlValue[];
  24 extern const char Control[];
  25 extern const char DesignMode[];
  26 extern const char Drag[];
  27 extern const char FontSizeChange[];
  28 extern const char Fonts[];
  29 extern const char FullScreen[];
  30 extern const char Inline[];
  31 extern const char InlineCSSStyleMutated[];
  32 extern const char Inspector[];
  33 extern const char Language[];
  34 extern const char LinkColorChange[];
  35 extern const char PlatformColorChange[];
  36 extern const char PropagateInheritChangeToDistributedNodes[];
  37 extern const char PseudoClass[];
  38 extern const char SVGContainerSizeChange[];
  39 extern const char SVGCursor[];
  40 extern const char SVGFilterLayerUpdate[];
  41 extern const char Shadow[];
  42 extern const char SiblingSelector[];
  43 extern const char StyleInvalidator[];
  44 extern const char StyleSheetChange[];
  45 extern const char Validate[];
  46 extern const char ViewportUnits[];
  47 extern const char VisitedLink[];
  48 extern const char VisuallyOrdered[];
  49 extern const char WritingModeChange[];
  50 extern const char Zoom[];
  51 }
  52 typedef const char StyleChangeReasonString[];
  53
  54 namespace StyleChangeExtraData {
  55 extern const AtomicString& Active;
  56 extern const AtomicString& Disabled;
  57 extern const AtomicString& Focus;
  58 extern const AtomicString& Hover;
  59 extern const AtomicString& Past;
  60 extern const AtomicString& Unresolved;
  61
  62 void init();
  63 }
  64
  65 // |StyleChangeReasonForTracing| is used to trace the reason a
  66 // |Node::setNeedsStyleRecalc| call was made to show it in DevTools or in
  67 // about:tracing.
  68 // |StyleChangeReasonForTracing| is strictly only for the tracing purpose as
  69 // described above. Blink logic must not depend on this value.
  70 class StyleChangeReasonForTracing {
  71     DISALLOW_ALLOCATION();
  72 public:
  73     static StyleChangeReasonForTracing create(StyleChangeReasonString reasonString)
  74     {
  75         return StyleChangeReasonForTracing(reasonString, nullAtom);
  76     }
  77
  78     static StyleChangeReasonForTracing createWithExtraData(StyleChangeReasonString reasonString, const AtomicString& extraData)
  79     {
  80         return StyleChangeReasonForTracing(reasonString, extraData);
  81     }
  82
  83     static StyleChangeReasonForTracing fromAttribute(const QualifiedName& attributeName)
  84     {
  85         return StyleChangeReasonForTracing(StyleChangeReason::Attribute, attributeName.localName());
  86     }
  87
  88     String reasonString() const { return String(m_reason); }
  89     const AtomicString& extraData() const { return m_extraData; }
  90
  91 private:
  92     StyleChangeReasonForTracing(StyleChangeReasonString reasonString, const AtomicString& extraData)
  93         : m_reason(reasonString)
  94         , m_extraData(extraData)
  95     {
  96     }
  97
  98     // disable comparisons
  99     void operator==(const StyleChangeReasonForTracing&) const { }
 100     void operator!=(const StyleChangeReasonForTracing&) const { }
 101
 102     const char* m_reason;
 103     AtomicString m_extraData;
 104 };
 105
 106 } // namespace blink
 107
 108 #endif // StyleChangeReason_h