1 | /* |
2 | * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
3 | * Copyright (C) 2004, 2005, 2006, 2009, 2010, 2013 Apple Inc. All rights reserved. |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Library General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Library General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Library General Public License |
16 | * along with this library; see the file COPYING.LIB. If not, write to |
17 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
18 | * Boston, MA 02110-1301, USA. |
19 | * |
20 | */ |
21 | |
22 | #pragma once |
23 | |
24 | #include "HTMLFrameOwnerElement.h" |
25 | #include "OverlapTestRequestClient.h" |
26 | #include "RenderReplaced.h" |
27 | #include "Widget.h" |
28 | |
29 | namespace WebCore { |
30 | |
31 | class WidgetHierarchyUpdatesSuspensionScope { |
32 | public: |
33 | WidgetHierarchyUpdatesSuspensionScope() |
34 | { |
35 | s_widgetHierarchyUpdateSuspendCount++; |
36 | } |
37 | ~WidgetHierarchyUpdatesSuspensionScope() |
38 | { |
39 | ASSERT(s_widgetHierarchyUpdateSuspendCount); |
40 | if (s_widgetHierarchyUpdateSuspendCount == 1) |
41 | moveWidgets(); |
42 | s_widgetHierarchyUpdateSuspendCount--; |
43 | } |
44 | |
45 | static bool isSuspended() { return s_widgetHierarchyUpdateSuspendCount; } |
46 | static void scheduleWidgetToMove(Widget& widget, FrameView* frame) { widgetNewParentMap().set(&widget, frame); } |
47 | |
48 | private: |
49 | using WidgetToParentMap = HashMap<RefPtr<Widget>, FrameView*>; |
50 | static WidgetToParentMap& widgetNewParentMap(); |
51 | |
52 | WEBCORE_EXPORT void moveWidgets(); |
53 | WEBCORE_EXPORT static unsigned s_widgetHierarchyUpdateSuspendCount; |
54 | }; |
55 | |
56 | class RenderWidget : public RenderReplaced, private OverlapTestRequestClient { |
57 | WTF_MAKE_ISO_ALLOCATED(RenderWidget); |
58 | public: |
59 | virtual ~RenderWidget(); |
60 | |
61 | HTMLFrameOwnerElement& frameOwnerElement() const { return downcast<HTMLFrameOwnerElement>(nodeForNonAnonymous()); } |
62 | |
63 | Widget* widget() const { return m_widget.get(); } |
64 | WEBCORE_EXPORT void setWidget(RefPtr<Widget>&&); |
65 | |
66 | static RenderWidget* find(const Widget&); |
67 | |
68 | enum class ChildWidgetState { Valid, Destroyed }; |
69 | ChildWidgetState updateWidgetPosition() WARN_UNUSED_RETURN; |
70 | WEBCORE_EXPORT IntRect windowClipRect() const; |
71 | |
72 | bool requiresAcceleratedCompositing() const; |
73 | |
74 | void ref() { ++m_refCount; } |
75 | void deref(); |
76 | |
77 | protected: |
78 | RenderWidget(HTMLFrameOwnerElement&, RenderStyle&&); |
79 | |
80 | void willBeDestroyed() override; |
81 | void styleDidChange(StyleDifference, const RenderStyle* oldStyle) final; |
82 | void layout() override; |
83 | void paint(PaintInfo&, const LayoutPoint&) override; |
84 | bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override; |
85 | virtual void paintContents(PaintInfo&, const LayoutPoint&); |
86 | bool requiresLayer() const override; |
87 | |
88 | private: |
89 | void element() const = delete; |
90 | |
91 | bool isWidget() const final { return true; } |
92 | |
93 | bool needsPreferredWidthsRecalculation() const final; |
94 | RenderBox* embeddedContentBox() const final; |
95 | |
96 | void setSelectionState(SelectionState) final; |
97 | void setOverlapTestResult(bool) final; |
98 | |
99 | bool setWidgetGeometry(const LayoutRect&); |
100 | bool updateWidgetGeometry(); |
101 | |
102 | RefPtr<Widget> m_widget; |
103 | IntRect m_clipRect; // The rectangle needs to remain correct after scrolling, so it is stored in content view coordinates, and not clipped to window. |
104 | unsigned m_refCount { 1 }; |
105 | }; |
106 | |
107 | inline void RenderWidget::deref() |
108 | { |
109 | ASSERT(m_refCount); |
110 | if (!--m_refCount) |
111 | delete this; |
112 | } |
113 | |
114 | } // namespace WebCore |
115 | |
116 | SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderWidget, isWidget()) |
117 | |