third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.h - Issue 1511003003: Use refs for non-null GraphicsContext, Scrollbar, etc. in scrollbar related code

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Issue 1511003003: Use refs for non-null GraphicsContext, Scrollbar, etc. in scrollbar related code (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@ScrollbarRemove

Patch Set: yet another mac fix Created 5 years ago

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1 /*	1 /*

2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.	2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.

3 *	3 *

4 * Redistribution and use in source and binary forms, with or without	4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions	5 * modification, are permitted provided that the following conditions

6 * are met:	6 * are met:

7 * 1. Redistributions of source code must retain the above copyright	7 * 1. Redistributions of source code must retain the above copyright

8 * notice, this list of conditions and the following disclaimer.	8 * notice, this list of conditions and the following disclaimer.

9 * 2. Redistributions in binary form must reproduce the above copyright	9 * 2. Redistributions in binary form must reproduce the above copyright

10 * notice, this list of conditions and the following disclaimer in the	10 * notice, this list of conditions and the following disclaimer in the

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29 #include "platform/scroll/ScrollbarTheme.h"	29 #include "platform/scroll/ScrollbarTheme.h"

30	30

31 namespace blink {	31 namespace blink {

32	32

33 class PlatformMouseEvent;	33 class PlatformMouseEvent;

34	34

35 class LayoutScrollbarTheme final : public ScrollbarTheme {	35 class LayoutScrollbarTheme final : public ScrollbarTheme {

36 public:	36 public:

37 ~LayoutScrollbarTheme() override { }	37 ~LayoutScrollbarTheme() override { }

38	38

39 int scrollbarThickness(ScrollbarControlSize controlSize) override { return S crollbarTheme::theme()->scrollbarThickness(controlSize); }	39 int scrollbarThickness(ScrollbarControlSize controlSize) override { return S crollbarTheme::theme().scrollbarThickness(controlSize); }

40	40

41 ScrollbarButtonsPlacement buttonsPlacement() const override { return Scrollb arTheme::theme()->buttonsPlacement(); }	41 ScrollbarButtonsPlacement buttonsPlacement() const override { return Scrollb arTheme::theme().buttonsPlacement(); }

42	42

43 void paintScrollCorner(GraphicsContext*, const DisplayItemClient&, const Int Rect& cornerRect) override;	43 void paintScrollCorner(GraphicsContext&, const DisplayItemClient&, const Int Rect& cornerRect) override;

44	44

45 bool shouldCenterOnThumb(const ScrollbarThemeClient* scrollbar, const Platfo rmMouseEvent& event) override { return ScrollbarTheme::theme()->shouldCenterOnTh umb(scrollbar, event); }	45 bool shouldCenterOnThumb(const ScrollbarThemeClient& scrollbar, const Platfo rmMouseEvent& event) override { return ScrollbarTheme::theme().shouldCenterOnThu mb(scrollbar, event); }

46 bool shouldSnapBackToDragOrigin(const ScrollbarThemeClient* scrollbar, const PlatformMouseEvent& event) override { return ScrollbarTheme::theme()->shouldSna pBackToDragOrigin(scrollbar, event); }	46 bool shouldSnapBackToDragOrigin(const ScrollbarThemeClient& scrollbar, const PlatformMouseEvent& event) override { return ScrollbarTheme::theme().shouldSnap BackToDragOrigin(scrollbar, event); }

47	47

48 double initialAutoscrollTimerDelay() override { return ScrollbarTheme::theme ()->initialAutoscrollTimerDelay(); }	48 double initialAutoscrollTimerDelay() override { return ScrollbarTheme::theme ().initialAutoscrollTimerDelay(); }

49 double autoscrollTimerDelay() override { return ScrollbarTheme::theme()->aut oscrollTimerDelay(); }	49 double autoscrollTimerDelay() override { return ScrollbarTheme::theme().auto scrollTimerDelay(); }

50	50

51 void registerScrollbar(ScrollbarThemeClient* scrollbar) override { return Sc rollbarTheme::theme()->registerScrollbar(scrollbar); }	51 void registerScrollbar(ScrollbarThemeClient& scrollbar) override { return Sc rollbarTheme::theme().registerScrollbar(scrollbar); }

52 void unregisterScrollbar(ScrollbarThemeClient* scrollbar) override { return ScrollbarTheme::theme()->unregisterScrollbar(scrollbar); }	52 void unregisterScrollbar(ScrollbarThemeClient& scrollbar) override { return ScrollbarTheme::theme().unregisterScrollbar(scrollbar); }

53	53

54 int minimumThumbLength(const ScrollbarThemeClient*) override;	54 int minimumThumbLength(const ScrollbarThemeClient&) override;

55	55

56 void buttonSizesAlongTrackAxis(const ScrollbarThemeClient*, int& beforeSize, int& afterSize);	56 void buttonSizesAlongTrackAxis(const ScrollbarThemeClient&, int& beforeSize, int& afterSize);

57	57

58 static LayoutScrollbarTheme* layoutScrollbarTheme();	58 static LayoutScrollbarTheme* layoutScrollbarTheme();

59	59

60 protected:	60 protected:

61 bool hasButtons(const ScrollbarThemeClient*) override;	61 bool hasButtons(const ScrollbarThemeClient&) override;

62 bool hasThumb(const ScrollbarThemeClient*) override;	62 bool hasThumb(const ScrollbarThemeClient&) override;

63	63

64 IntRect backButtonRect(const ScrollbarThemeClient*, ScrollbarPart, bool pain ting = false) override;	64 IntRect backButtonRect(const ScrollbarThemeClient&, ScrollbarPart, bool pain ting = false) override;

65 IntRect forwardButtonRect(const ScrollbarThemeClient*, ScrollbarPart, bool p ainting = false) override;	65 IntRect forwardButtonRect(const ScrollbarThemeClient&, ScrollbarPart, bool p ainting = false) override;

66 IntRect trackRect(const ScrollbarThemeClient*, bool painting = false) overri de;	66 IntRect trackRect(const ScrollbarThemeClient&, bool painting = false) overri de;

67	67

68 void paintScrollbarBackground(GraphicsContext, const ScrollbarThemeClient) override;	68 void paintScrollbarBackground(GraphicsContext&, const ScrollbarThemeClient&) override;

69 void paintTrackBackground(GraphicsContext, const ScrollbarThemeClient, con st IntRect&) override;	69 void paintTrackBackground(GraphicsContext&, const ScrollbarThemeClient&, con st IntRect&) override;

70 void paintTrackPiece(GraphicsContext, const ScrollbarThemeClient, const In tRect&, ScrollbarPart) override;	70 void paintTrackPiece(GraphicsContext&, const ScrollbarThemeClient&, const In tRect&, ScrollbarPart) override;

71 void paintButton(GraphicsContext, const ScrollbarThemeClient, const IntRec t&, ScrollbarPart) override;	71 void paintButton(GraphicsContext&, const ScrollbarThemeClient&, const IntRec t&, ScrollbarPart) override;

72 void paintThumb(GraphicsContext, const ScrollbarThemeClient, const IntRect &) override;	72 void paintThumb(GraphicsContext&, const ScrollbarThemeClient&, const IntRect &) override;

73 void paintTickmarks(GraphicsContext, const ScrollbarThemeClient, const Int Rect&) override;	73 void paintTickmarks(GraphicsContext&, const ScrollbarThemeClient&, const Int Rect&) override;

74	74

75 IntRect constrainTrackRectToTrackPieces(const ScrollbarThemeClient*, const I ntRect&) override;	75 IntRect constrainTrackRectToTrackPieces(const ScrollbarThemeClient&, const I ntRect&) override;

76 };	76 };

77	77

78 } // namespace blink	78 } // namespace blink

79	79

80 #endif // LayoutScrollbarTheme_h	80 #endif // LayoutScrollbarTheme_h

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