CSS Independent Transform Properties

Source/core/style/ComputedStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 59 matching lines @@
 #include "platform/fonts/FontBaseline.h"
 #include "platform/fonts/FontDescription.h"
 #include "platform/geometry/FloatRoundedRect.h"
 #include "platform/geometry/LayoutRectOutsets.h"
 #include "platform/graphics/Color.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/text/TextDirection.h"
 #include "platform/text/TextRun.h"
 #include "platform/text/UnicodeBidi.h"
+#include "platform/transforms/RotateTransformOperation.h"
+#include "platform/transforms/ScaleTransformOperation.h"
 #include "platform/transforms/TransformOperations.h"
+#include "platform/transforms/TranslateTransformOperation.h"

[alancutter (OOO until 2018), 2015/06/18 13:03:24]

Can these be forward declared?

 #include "public/platform/WebScrollBlocksOn.h"
 #include "wtf/Forward.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/Vector.h"
 
 template<typename T, typename U> inline bool compareEqual(const T& t, const U& u) { return t == static_cast<T>(u); }
 
 #define SET_VAR(group, variable, value) \
@@ skipping 745 matching lines @@
     ColumnSpan columnSpan() const { return static_cast<ColumnSpan>(rareNonInheritedData->m_multiCol->m_columnSpan); }
     EPageBreak columnBreakBefore() const { return static_cast<EPageBreak>(rareNonInheritedData->m_multiCol->m_breakBefore); }
     EPageBreak columnBreakInside() const { return static_cast<EPageBreak>(rareNonInheritedData->m_multiCol->m_breakInside); }
     EPageBreak columnBreakAfter() const { return static_cast<EPageBreak>(rareNonInheritedData->m_multiCol->m_breakAfter); }
     bool hasInlineTransform() const { return rareNonInheritedData->m_hasInlineTransform; }
     bool hasCompositorProxy() const { return rareNonInheritedData->m_hasCompositorProxy; }
     const TransformOperations& transform() const { return rareNonInheritedData->m_transform->m_operations; }
     const TransformOrigin& transformOrigin() const { return rareNonInheritedData->m_transform->m_origin; }
     const Length& transformOriginX() const { return transformOrigin().x(); }
     const Length& transformOriginY() const { return transformOrigin().y(); }
+    TranslateTransformOperation* translate() const { return rareNonInheritedData->m_transform->m_translate.get(); }
+    RotateTransformOperation* rotate() const { return rareNonInheritedData->m_transform->m_rotate.get(); }
+    ScaleTransformOperation* scale() const { return rareNonInheritedData->m_transform->m_scale.get(); }

[alancutter (OOO until 2018), 2015/06/18 13:03:24]

The returned pointer should be const.

[soonm, 2015/06/19 04:39:52]

As discussed, there is a use case for non-const raw ptr.

     float transformOriginZ() const { return transformOrigin().z(); }
-    bool hasTransform() const { return hasTransformOperations() || hasMotionPath() || hasCurrentTransformAnimation(); }
+    bool has3DTransform() const { return rareNonInheritedData->m_transform->has3DTransform(); }
+    bool hasTransform() const { return hasTransformOperations() || hasMotionPath() || hasCurrentTransformAnimation() || translate() || rotate() || scale(); }
     bool transformDataEquivalent(const ComputedStyle& otherStyle) const { return rareNonInheritedData->m_transform == otherStyle.rareNonInheritedData->m_transform; }
 
     StyleMotionPath* motionPath() const { return rareNonInheritedData->m_transform->m_motion.m_path.get(); }
     bool hasMotionPath() const { return rareNonInheritedData->m_transform->m_motion.m_path; }
     const Length& motionOffset() const { return rareNonInheritedData->m_transform->m_motion.m_offset; }
     float motionRotation() const { return rareNonInheritedData->m_transform->m_motion.m_rotation; }
     MotionRotationType motionRotationType() const { return rareNonInheritedData->m_transform->m_motion.m_rotationType; }
 
     TextEmphasisFill textEmphasisFill() const { return static_cast<TextEmphasisFill>(rareInheritedData->textEmphasisFill); }
     TextEmphasisMark textEmphasisMark() const;
     const AtomicString& textEmphasisCustomMark() const { return rareInheritedData->textEmphasisCustomMark; }
     TextEmphasisPosition textEmphasisPosition() const { return static_cast<TextEmphasisPosition>(rareInheritedData->textEmphasisPosition); }
     const AtomicString& textEmphasisMarkString() const;
 
     RubyPosition rubyPosition() const { return static_cast<RubyPosition>(rareInheritedData->m_rubyPosition); }
 
     TextOrientation textOrientation() const { return static_cast<TextOrientation>(rareInheritedData->m_textOrientation); }
 
     ObjectFit objectFit() const { return static_cast<ObjectFit>(rareNonInheritedData->m_objectFit); }
     LengthPoint objectPosition() const { return rareNonInheritedData->m_objectPosition; }
 
     // Return true if any transform related property (currently transform/motionPath, transformStyle3D or perspective)
     // indicates that we are transforming
     bool hasTransformRelatedProperty() const { return hasTransform() || preserves3D() || hasPerspective(); }
 
     enum ApplyTransformOrigin { IncludeTransformOrigin, ExcludeTransformOrigin };
     enum ApplyMotionPath { IncludeMotionPath, ExcludeMotionPath };
-    void applyTransform(TransformationMatrix&, const LayoutSize& borderBoxSize, ApplyTransformOrigin = IncludeTransformOrigin, ApplyMotionPath = IncludeMotionPath) const;
-    void applyTransform(TransformationMatrix&, const FloatRect& boundingBox, ApplyTransformOrigin = IncludeTransformOrigin, ApplyMotionPath = IncludeMotionPath) const;
-
+    enum ApplyIndependentTransformProperties { IncludeIndependentTransformProperties , ExcludeIndependentTransformProperties };
+    void applyTransform(TransformationMatrix&, const LayoutSize& borderBoxSize, ApplyTransformOrigin, ApplyMotionPath, ApplyIndependentTransformProperties) const;
+    void applyTransform(TransformationMatrix&, const FloatRect& boundingBox, ApplyTransformOrigin, ApplyMotionPath, ApplyIndependentTransformProperties) const;
     bool hasMask() const { return rareNonInheritedData->m_mask.hasImage() || rareNonInheritedData->m_maskBoxImage.hasImage(); }
 
     TextCombine textCombine() const { return static_cast<TextCombine>(rareNonInheritedData->m_textCombine); }
     bool hasTextCombine() const { return textCombine() != TextCombineNone; }
 
     TabSize tabSize() const { return rareInheritedData->m_tabSize; }
 
     // End CSS3 Getters
 
     // Apple-specific property getter methods
@@ skipping 443 matching lines @@
     void setColumnBreakInside(EPageBreak p) { ASSERT(p == PBAUTO || p == PBAVOID); SET_VAR(rareNonInheritedData.access()->m_multiCol, m_breakInside, p); }
     void setColumnBreakAfter(EPageBreak p) { SET_VAR(rareNonInheritedData.access()->m_multiCol, m_breakAfter, p); }
     void inheritColumnPropertiesFrom(const ComputedStyle& parent) { rareNonInheritedData.access()->m_multiCol = parent.rareNonInheritedData->m_multiCol; }
     void setHasInlineTransform(bool b) { SET_VAR(rareNonInheritedData, m_hasInlineTransform, b); }
     void setHasCompositorProxy(bool b) { SET_VAR(rareNonInheritedData, m_hasCompositorProxy, b); }
     void setTransform(const TransformOperations& ops) { SET_VAR(rareNonInheritedData.access()->m_transform, m_operations, ops); }
     void setTransformOriginX(const Length& v) { setTransformOrigin(TransformOrigin(v, transformOriginY(), transformOriginZ())); }
     void setTransformOriginY(const Length& v) { setTransformOrigin(TransformOrigin(transformOriginX(), v, transformOriginZ())); }
     void setTransformOriginZ(float f) { setTransformOrigin(TransformOrigin(transformOriginX(), transformOriginY(), f)); }
     void setTransformOrigin(const TransformOrigin& o) { SET_VAR(rareNonInheritedData.access()->m_transform, m_origin, o); }
+    void setTranslate(PassRefPtr<TranslateTransformOperation> v) { rareNonInheritedData.access()->m_transform.access()->m_translate = v; }
+    void setRotate(PassRefPtr<RotateTransformOperation> v) { rareNonInheritedData.access()->m_transform.access()->m_rotate = v; }
+    void setScale(PassRefPtr<ScaleTransformOperation> v) { rareNonInheritedData.access()->m_transform.access()->m_scale = v; }
+
     void setSpeak(ESpeak s) { SET_VAR(rareInheritedData, speak, s); }
     void setTextCombine(TextCombine v) { SET_VAR(rareNonInheritedData, m_textCombine, v); }
     void setTextDecorationColor(const StyleColor& c) { SET_VAR(rareNonInheritedData, m_textDecorationColor, c); }
     void setTextEmphasisColor(const StyleColor& c) { SET_VAR_WITH_SETTER(rareInheritedData, textEmphasisColor, setTextEmphasisColor, c); }
     void setTextEmphasisFill(TextEmphasisFill fill) { SET_VAR(rareInheritedData, textEmphasisFill, fill); }
     void setTextEmphasisMark(TextEmphasisMark mark) { SET_VAR(rareInheritedData, textEmphasisMark, mark); }
     void setTextEmphasisCustomMark(const AtomicString& mark) { SET_VAR(rareInheritedData, textEmphasisCustomMark, mark); }
     void setTextEmphasisPosition(TextEmphasisPosition position) { SET_VAR(rareInheritedData, textEmphasisPosition, position); }
     bool setTextOrientation(TextOrientation);
 
@@ skipping 288 matching lines @@
     static const AtomicString& initialHyphenationString() { return nullAtom; }
     static const AtomicString& initialLocale() { return nullAtom; }
     static EResize initialResize() { return RESIZE_NONE; }
     static ControlPart initialAppearance() { return NoControlPart; }
     static Order initialRTLOrdering() { return LogicalOrder; }
     static float initialTextStrokeWidth() { return 0; }
     static unsigned short initialColumnCount() { return 1; }
     static ColumnFill initialColumnFill() { return ColumnFillBalance; }
     static ColumnSpan initialColumnSpan() { return ColumnSpanNone; }
     static const TransformOperations& initialTransform() { DEFINE_STATIC_LOCAL(TransformOperations, ops, ()); return ops; }
+    static const PassRefPtr<TranslateTransformOperation> initialTranslate() { return TranslateTransformOperation::create(Length(0, Fixed), Length(0, Fixed), 0, TransformOperation::Translate3D); }

[Timothy Loh, 2015/06/19 01:16:45]

returning const values is... weird. I'm pretty sure there's no reason for the
const.

[soonm, 2015/06/19 04:39:52]

Done - Yep no need to be const here

+    static const PassRefPtr<RotateTransformOperation> initialRotate() { return RotateTransformOperation::create(0, 0, 1, 0, TransformOperation::Rotate3D); }
+    static const PassRefPtr<ScaleTransformOperation> initialScale() { return ScaleTransformOperation::create(1, 1, 1, TransformOperation::Scale3D); }
     static Length initialTransformOriginX() { return Length(50.0, Percent); }
     static Length initialTransformOriginY() { return Length(50.0, Percent); }
     static float initialTransformOriginZ() { return 0; }
     static TransformOrigin initialTransformOrigin() { return TransformOrigin(Length(50.0, Percent), Length(50.0, Percent), 0); }
     static EPointerEvents initialPointerEvents() { return PE_AUTO; }
     static ETransformStyle3D initialTransformStyle3D() { return TransformStyle3DFlat; }
     static const StyleMotionPath* initialMotionPath() { return nullptr; }
     static Length initialMotionOffset() { return Length(0, Fixed); }
     static float initialMotionRotation() { return 0; }
     static MotionRotationType initialMotionRotationType() { return MotionRotationAuto; }
@@ skipping 144 matching lines @@
     void appendContent(PassOwnPtr<ContentData>);
     void addAppliedTextDecoration(const AppliedTextDecoration&);
     bool hasTransformOperations() const { return !rareNonInheritedData->m_transform->m_operations.operations().isEmpty(); }
     void applyMotionPathTransform(TransformationMatrix&) const;
 
     bool diffNeedsFullLayoutAndPaintInvalidation(const ComputedStyle& other) const;
     bool diffNeedsFullLayout(const ComputedStyle& other) const;
     bool diffNeedsPaintInvalidationLayer(const ComputedStyle& other) const;
     bool diffNeedsPaintInvalidationObject(const ComputedStyle& other) const;
     void updatePropertySpecificDifferences(const ComputedStyle& other, StyleDifference&) const;
+
+    bool requireTransformOrigin(ApplyTransformOrigin applyOrigin, ApplyMotionPath) const;
 };
 
 // FIXME: Reduce/remove the dependency on zoom adjusted int values.
 // The float or LayoutUnit versions of layout values should be used.
 inline int adjustForAbsoluteZoom(int value, float zoomFactor)
 {
     if (zoomFactor == 1)
         return value;
     // Needed because computeLengthInt truncates (rather than rounds) when scaling up.
     float fvalue = value;
@@ skipping 92 matching lines @@
 }
 
 inline bool ComputedStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags.pseudoBits & PSEUDO_ELEMENT_MASK;
 }
 
 } // namespace blink
 
 #endif // ComputedStyle_h