Source/core/dom/WheelController.cpp - Issue 206603002: Add EventHandlerRegistry

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Issue 206603002: Add EventHandlerRegistry (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Refactoring WIP. Created 6 years, 9 months ago

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1 /*

2 * Copyright (C) 2013 Google, Inc. All rights reserved.

3 *

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

5 * modification, are permitted provided that the following conditions

6 * are met:

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

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

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

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

11 * documentation and/or other materials provided with the distribution.

12 *

13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY

14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

24 */

25

26 #include "config.h"

27 #include "core/dom/WheelController.h"

28

29 #include "core/dom/Document.h"

30 #include "core/events/ThreadLocalEventNames.h"

31 #include "core/events/WheelEvent.h"

32 #include "core/frame/LocalFrame.h"

33 #include "core/page/Page.h"

34 #include "core/page/scrolling/ScrollingCoordinator.h"

35

36 namespace WebCore {

37

38 WheelController::WheelController(Document& document)

39 : DOMWindowLifecycleObserver(document.domWindow())

40 , m_wheelEventHandlerCount(0)

41 {

42 }

43

44 WheelController::~WheelController()

45 {

46 }

47

48 const char* WheelController::supplementName()

49 {

50 return "WheelController";

51 }

52

53 WheelController* WheelController::from(Document& document)

54 {

55 WheelController* controller = static_cast<WheelController*>(DocumentSuppleme nt::from(document, supplementName()));

56 if (!controller) {

57 controller = new WheelController(document);

58 DocumentSupplement::provideTo(document, supplementName(), adoptPtr(contr oller));

59 }

60 return controller;

61 }

62

63 static void wheelEventHandlerCountChanged(Document& document)

64 {

65 Page* page = document.page();

66 if (!page)

67 return;

68

69 ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator();

70 if (!scrollingCoordinator)

71 return;

72

73 FrameView* frameView = document.view();

74 if (!frameView)

75 return;

76

77 scrollingCoordinator->frameViewWheelEventHandlerCountChanged(frameView);

78 }

79

80 void WheelController::didAddWheelEventHandler(Document& document)

81 {

82 ++m_wheelEventHandlerCount;

83 Page* page = document.page();

84 LocalFrame* mainFrame = page ? page->mainFrame() : 0;

85 if (mainFrame)

86 mainFrame->notifyChromeClientWheelEventHandlerCountChanged();

87

88 wheelEventHandlerCountChanged(document);

89 }

90

91 void WheelController::didRemoveWheelEventHandler(Document& document)

92 {

93 ASSERT(m_wheelEventHandlerCount > 0);

94 --m_wheelEventHandlerCount;

95 Page* page = document.page();

96 LocalFrame* mainFrame = page ? page->mainFrame() : 0;

97 if (mainFrame)

98 mainFrame->notifyChromeClientWheelEventHandlerCountChanged();

99

100 wheelEventHandlerCountChanged(document);

101 }

102

103 void WheelController::didAddEventListener(DOMWindow* window, const AtomicString& eventType)

104 {

105 if (eventType != EventTypeNames::wheel && eventType != EventTypeNames::mouse wheel)

106 return;

107

108 Document* document = window->document();

109 ASSERT(document);

110 didAddWheelEventHandler(*document);

111 }

112

113 void WheelController::didRemoveEventListener(DOMWindow* window, const AtomicStri ng& eventType)

114 {

115 if (eventType != EventTypeNames::wheel && eventType != EventTypeNames::mouse wheel)

116 return;

117

118 Document* document = window->document();

119 ASSERT(document);

120 didRemoveWheelEventHandler(*document);

121 }

122

123 } // namespace WebCore

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« Source/core/dom/EventHandlerRegistry.h ('K') | « Source/core/dom/WheelController.h ('k') | Source/core/frame/LocalFrame.cpp » ('j') | Source/core/page/scrolling/ScrollingCoordinator.cpp » ('J')