Constify and use reference for RenderStyle in LayoutTheme

Source/core/layout/LayoutTheme.h

 /*
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 37 matching lines @@
 protected:
     LayoutTheme();
 
 public:
     virtual ~LayoutTheme() { }
 
     // This function is to be implemented in your platform-specific theme implementation to hand back the
     // appropriate platform theme.
     static LayoutTheme& theme();
 
-    static void setSizeIfAuto(RenderStyle*, const IntSize&);
+    static void setSizeIfAuto(RenderStyle&, const IntSize&);
 
     // This method is called whenever style has been computed for an element and the appearance
     // property has been set to a value other than "none".  The theme should map in all of the appropriate
     // metrics and defaults given the contents of the style.  This includes sophisticated operations like
     // selection of control size based off the font, the disabling of appearance when certain other properties like
     // "border" are set, or if the appearance is not supported by the theme.
-    void adjustStyle(RenderStyle*, Element*, const CachedUAStyle*);
+    void adjustStyle(RenderStyle&, Element*, const CachedUAStyle*);
 
     // This method is called to paint the widget as a background of the RenderObject.  A widget's foreground, e.g., the
     // text of a button, is always rendered by the engine itself.  The boolean return value indicates
     // whether the CSS border/background should also be painted.
     bool paint(RenderObject*, const PaintInfo&, const IntRect&);
     bool paintBorderOnly(RenderObject*, const PaintInfo&, const IntRect&);
     bool paintDecorations(RenderObject*, const PaintInfo&, const IntRect&);
 
     // The remaining methods should be implemented by the platform-specific portion of the theme, e.g.,
     // LayoutThemeMac.cpp for Mac OS X.
 
     // These methods return the theme's extra style sheets rules, to let each platform
     // adjust the default CSS rules in html.css, quirks.css or mediaControls.css.
     virtual String extraDefaultStyleSheet();
     virtual String extraQuirksStyleSheet() { return String(); }
     virtual String extraMediaControlsStyleSheet() { return String(); }
     virtual String extraFullScreenStyleSheet() { return String(); }
 
     // A method to obtain the baseline position for a "leaf" control.  This will only be used if a baseline
     // position cannot be determined by examining child content. Checkboxes and radio buttons are examples of
     // controls that need to do this.
     virtual int baselinePosition(const RenderObject*) const;
 
     // A method for asking if a control is a container or not.  Leaf controls have to have some special behavior (like
     // the baseline position API above).
     bool isControlContainer(ControlPart) const;
 
     // Whether or not the control has been styled enough by the author to disable the native appearance.
-    virtual bool isControlStyled(const RenderStyle*, const CachedUAStyle*) const;
+    virtual bool isControlStyled(const RenderStyle&, const CachedUAStyle*) const;
 
     // Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls issues paint invalidations,
     // the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control.
     virtual void adjustPaintInvalidationRect(const RenderObject*, IntRect&);
 
     // This method is called whenever a relevant state changes on a particular themed object, e.g., the mouse becomes pressed
     // or a control becomes disabled.
     virtual bool stateChanged(RenderObject*, ControlState) const;
 
     bool shouldDrawDefaultFocusRing(RenderObject*) const;
 
     // A method asking if the theme's controls actually care about redrawing when hovered.
-    virtual bool supportsHover(const RenderStyle*) const { return false; }
+    virtual bool supportsHover(const RenderStyle&) const { return false; }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
     // A method asking if the platform is able to show a calendar picker for a given input type.
     virtual bool supportsCalendarPicker(const AtomicString&) const;
 #endif
 
     // Text selection colors.
     Color activeSelectionBackgroundColor() const;
     Color inactiveSelectionBackgroundColor() const;
     Color activeSelectionForegroundColor() const;
@@ skipping 17 matching lines @@
     virtual Color platformDefaultCompositionBackgroundColor() const { return defaultCompositionBackgroundColor; }
     virtual void platformColorsDidChange();
 
     virtual double caretBlinkInterval() const { return 0.5; }
 
     // System fonts and colors for CSS.
     virtual void systemFont(CSSValueID systemFontID, FontStyle&, FontWeight&, float& fontSize, AtomicString& fontFamily) const = 0;
     void systemFont(CSSValueID systemFontID, FontDescription&);
     virtual Color systemColor(CSSValueID) const;
 
-    virtual int minimumMenuListSize(RenderStyle*) const { return 0; }
+    virtual int minimumMenuListSize(const RenderStyle&) const { return 0; }
 
-    virtual void adjustSliderThumbSize(RenderStyle*, Element*) const;
+    virtual void adjustSliderThumbSize(RenderStyle&, Element*) const;
 
-    virtual int popupInternalPaddingLeft(RenderStyle*) const { return 0; }
-    virtual int popupInternalPaddingRight(RenderStyle*) const { return 0; }
-    virtual int popupInternalPaddingTop(RenderStyle*) const { return 0; }
-    virtual int popupInternalPaddingBottom(RenderStyle*) const { return 0; }
+    virtual int popupInternalPaddingLeft(const RenderStyle&) const { return 0; }
+    virtual int popupInternalPaddingRight(const RenderStyle&) const { return 0; }
+    virtual int popupInternalPaddingTop(const RenderStyle&) const { return 0; }
+    virtual int popupInternalPaddingBottom(const RenderStyle&) const { return 0; }
     virtual bool popupOptionSupportsTextIndent() const { return false; }
 
     virtual ScrollbarControlSize scrollbarControlSizeForPart(ControlPart) { return RegularScrollbar; }
 
     // Method for painting the caps lock indicator
     virtual bool paintCapsLockIndicator(RenderObject*, const PaintInfo&, const IntRect&) { return 0; };
 
     // Returns the repeat interval of the animation for the progress bar.
     virtual double animationRepeatIntervalForProgressBar(RenderProgress*) const;
     // Returns the duration of the animation for the progress bar.
@@ skipping 37 matching lines @@
     virtual Color platformInactiveSelectionBackgroundColor() const;
     virtual Color platformActiveSelectionForegroundColor() const;
     virtual Color platformInactiveSelectionForegroundColor() const;
 
     virtual Color platformActiveListBoxSelectionBackgroundColor() const;
     virtual Color platformInactiveListBoxSelectionBackgroundColor() const;
     virtual Color platformActiveListBoxSelectionForegroundColor() const;
     virtual Color platformInactiveListBoxSelectionForegroundColor() const;
 
     // A method asking if the theme is able to draw the focus ring.
-    virtual bool supportsFocusRing(const RenderStyle*) const;
+    virtual bool supportsFocusRing(const RenderStyle&) const;
 
 #if !USE(NEW_THEME)
     // Methods for each appearance value.
-    virtual void adjustCheckboxStyle(RenderStyle*, Element*) const;
+    virtual void adjustCheckboxStyle(RenderStyle&, Element*) const;
     virtual bool paintCheckbox(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
-    virtual void setCheckboxSize(RenderStyle*) const { }
+    virtual void setCheckboxSize(RenderStyle&) const { }
 
-    virtual void adjustRadioStyle(RenderStyle*, Element*) const;
+    virtual void adjustRadioStyle(RenderStyle&, Element*) const;
     virtual bool paintRadio(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
-    virtual void setRadioSize(RenderStyle*) const { }
+    virtual void setRadioSize(RenderStyle&) const { }
 
-    virtual void adjustButtonStyle(RenderStyle*, Element*) const;
+    virtual void adjustButtonStyle(RenderStyle&, Element*) const;
     virtual bool paintButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustInnerSpinButtonStyle(RenderStyle*, Element*) const;
+    virtual void adjustInnerSpinButtonStyle(RenderStyle&, Element*) const;
     virtual bool paintInnerSpinButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 #endif
 
     virtual bool paintTextField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
     virtual bool paintTextArea(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustMenuListStyle(RenderStyle*, Element*) const;
+    virtual void adjustMenuListStyle(RenderStyle&, Element*) const;
     virtual bool paintMenuList(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustMenuListButtonStyle(RenderStyle*, Element*) const;
+    virtual void adjustMenuListButtonStyle(RenderStyle&, Element*) const;
     virtual bool paintMenuListButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
     virtual bool paintMeter(RenderObject*, const PaintInfo&, const IntRect&);
 
     virtual bool paintProgressBar(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
     virtual bool paintSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustSliderThumbStyle(RenderStyle*, Element*) const;
+    virtual void adjustSliderThumbStyle(RenderStyle&, Element*) const;
     virtual bool paintSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustSearchFieldStyle(RenderStyle*, Element*) const;
+    virtual void adjustSearchFieldStyle(RenderStyle&, Element*) const;
     virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const;
+    virtual void adjustSearchFieldCancelButtonStyle(RenderStyle&, Element*) const;
     virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const;
+    virtual void adjustSearchFieldDecorationStyle(RenderStyle&, Element*) const;
     virtual bool paintSearchFieldDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const;
+    virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle&, Element*) const;
     virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
     virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaOverlayPlayButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaVolumeSliderContainer(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaCastButton(RenderObject*, const PaintInfo&, const IntRect&) { return true; };
     virtual bool paintMediaControlsBackground(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaCurrentTime(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaTimeRemaining(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaFullScreenVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
     virtual bool paintMediaFullScreenVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&) { return true; }
 
-    virtual bool shouldUseFallbackTheme(RenderStyle*) const;
-    void adjustStyleUsingFallbackTheme(RenderStyle*, Element*);
+    virtual bool shouldUseFallbackTheme(const RenderStyle&) const;
+    void adjustStyleUsingFallbackTheme(RenderStyle&, Element*);
     bool paintUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
-    void adjustCheckboxStyleUsingFallbackTheme(RenderStyle*, Element*) const;
+    void adjustCheckboxStyleUsingFallbackTheme(RenderStyle&, Element*) const;
     bool paintCheckboxUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
-    void adjustRadioStyleUsingFallbackTheme(RenderStyle*, Element*) const;
+    void adjustRadioStyleUsingFallbackTheme(RenderStyle&, Element*) const;
     bool paintRadioUsingFallbackTheme(RenderObject*, const PaintInfo&, const IntRect&);
 
 public:
     // Methods for state querying
     ControlStates controlStatesForRenderer(const RenderObject*) const;
     bool isActive(const RenderObject*) const;
     bool isChecked(const RenderObject*) const;
     bool isIndeterminate(const RenderObject*) const;
     bool isEnabled(const RenderObject*) const;
     bool isFocused(const RenderObject*) const;
@@ skipping 14 matching lines @@
     static const RGBA32 defaultCompositionBackgroundColor = 0xFFFFDD55;
 
 #if USE(NEW_THEME)
     Theme* m_platformTheme; // The platform-specific theme.
 #endif
 };
 
 } // namespace blink
 
 #endif // LayoutTheme_h