/src/mozilla-central/dom/base/VisualViewport.cpp
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1 | | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
3 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #include "VisualViewport.h" |
8 | | #include "nsIScrollableFrame.h" |
9 | | #include "nsIDocShell.h" |
10 | | |
11 | | using namespace mozilla; |
12 | | using namespace mozilla::dom; |
13 | | |
14 | | VisualViewport::VisualViewport(nsPIDOMWindowInner* aWindow) |
15 | | : DOMEventTargetHelper(aWindow) |
16 | 0 | { |
17 | 0 | } |
18 | | |
19 | | VisualViewport::~VisualViewport() |
20 | 0 | { |
21 | 0 | } |
22 | | |
23 | | /* virtual */ |
24 | | JSObject* |
25 | | VisualViewport::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) |
26 | 0 | { |
27 | 0 | return VisualViewport_Binding::Wrap(aCx, this, aGivenProto); |
28 | 0 | } |
29 | | |
30 | | CSSSize |
31 | | VisualViewport::VisualViewportSize() const |
32 | 0 | { |
33 | 0 | CSSSize size = CSSSize(0,0); |
34 | 0 |
|
35 | 0 | nsIPresShell* presShell = GetPresShell(); |
36 | 0 | if (presShell) { |
37 | 0 | if (presShell->IsVisualViewportSizeSet()) { |
38 | 0 | size = CSSRect::FromAppUnits( |
39 | 0 | presShell->GetVisualViewportSize()); |
40 | 0 | } else { |
41 | 0 | nsIScrollableFrame* sf = presShell->GetRootScrollFrameAsScrollable(); |
42 | 0 | if (sf) { |
43 | 0 | size = CSSRect::FromAppUnits(sf->GetScrollPortRect().Size()); |
44 | 0 | } |
45 | 0 | } |
46 | 0 | } |
47 | 0 | return size; |
48 | 0 | } |
49 | | |
50 | | double |
51 | | VisualViewport::Width() const |
52 | 0 | { |
53 | 0 | CSSSize size = VisualViewportSize(); |
54 | 0 | return size.width; |
55 | 0 | } |
56 | | |
57 | | double |
58 | | VisualViewport::Height() const |
59 | 0 | { |
60 | 0 | CSSSize size = VisualViewportSize(); |
61 | 0 | return size.height; |
62 | 0 | } |
63 | | |
64 | | double |
65 | | VisualViewport::Scale() const |
66 | 0 | { |
67 | 0 | double scale = 1; |
68 | 0 | nsIPresShell* presShell = GetPresShell(); |
69 | 0 | if (presShell) { |
70 | 0 | scale = presShell->GetResolution(); |
71 | 0 | } |
72 | 0 | return scale; |
73 | 0 | } |
74 | | |
75 | | CSSPoint |
76 | | VisualViewport::VisualViewportOffset() const |
77 | 0 | { |
78 | 0 | CSSPoint offset = CSSPoint(0,0); |
79 | 0 |
|
80 | 0 | nsIPresShell* presShell = GetPresShell(); |
81 | 0 | if (presShell) { |
82 | 0 | offset = CSSPoint::FromAppUnits(presShell->GetVisualViewportOffset()); |
83 | 0 | } |
84 | 0 | return offset; |
85 | 0 | } |
86 | | |
87 | | CSSPoint |
88 | | VisualViewport::LayoutViewportOffset() const |
89 | 0 | { |
90 | 0 | CSSPoint offset = CSSPoint(0,0); |
91 | 0 |
|
92 | 0 | nsIPresShell* presShell = GetPresShell(); |
93 | 0 | if (presShell) { |
94 | 0 | nsIScrollableFrame* sf = presShell->GetRootScrollFrameAsScrollable(); |
95 | 0 | if (sf) { |
96 | 0 | offset = CSSPoint::FromAppUnits(sf->GetScrollPosition()); |
97 | 0 | } |
98 | 0 | } |
99 | 0 | return offset; |
100 | 0 | } |
101 | | |
102 | | double |
103 | | VisualViewport::PageLeft() const |
104 | 0 | { |
105 | 0 | return VisualViewportOffset().X(); |
106 | 0 | } |
107 | | |
108 | | double |
109 | | VisualViewport::PageTop() const |
110 | 0 | { |
111 | 0 | return VisualViewportOffset().Y(); |
112 | 0 | } |
113 | | |
114 | | double |
115 | | VisualViewport::OffsetLeft() const |
116 | 0 | { |
117 | 0 | return PageLeft() - LayoutViewportOffset().X(); |
118 | 0 | } |
119 | | |
120 | | double |
121 | | VisualViewport::OffsetTop() const |
122 | 0 | { |
123 | 0 | return PageTop() - LayoutViewportOffset().Y(); |
124 | 0 | } |
125 | | |
126 | | nsIPresShell* |
127 | | VisualViewport::GetPresShell() const |
128 | 0 | { |
129 | 0 | nsCOMPtr<nsPIDOMWindowInner> window = GetOwner(); |
130 | 0 | if (!window) { |
131 | 0 | return nullptr; |
132 | 0 | } |
133 | 0 | |
134 | 0 | nsIDocShell* docShell = window->GetDocShell(); |
135 | 0 | if (!docShell) { |
136 | 0 | return nullptr; |
137 | 0 | } |
138 | 0 | |
139 | 0 | return docShell->GetPresShell(); |
140 | 0 | } |