1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "views/controls/native/native_view_host.h"
#include "base/logging.h"
#include "app/gfx/canvas.h"
#include "views/controls/native/native_view_host_wrapper.h"
#include "views/focus/focus_manager.h"
#include "views/widget/widget.h"
namespace views {
// static
const char NativeViewHost::kViewClassName[] = "views/NativeViewHost";
////////////////////////////////////////////////////////////////////////////////
// NativeViewHost, public:
NativeViewHost::NativeViewHost()
: native_view_(NULL),
fast_resize_(false),
focus_native_view_(NULL) {
// By default we make this view the one that should be set as the focused view
// when the native view gets the focus.
focus_view_ = this;
// The native widget is placed relative to the root. As such, we need to
// know when the position of any ancestor changes, or our visibility relative
// to other views changed as it'll effect our position relative to the root.
SetNotifyWhenVisibleBoundsInRootChanges(true);
}
NativeViewHost::~NativeViewHost() {
}
void NativeViewHost::Attach(gfx::NativeView native_view) {
DCHECK(!native_view_);
native_view_ = native_view;
// If this NativeViewHost is the focus view, than it should obviously be
// focusable. If it is not, then it acts as a container and we don't want it
// to get focus through tab-traversal, so we make it not focusable.
SetFocusable(focus_view_ == this);
if (!focus_native_view_)
focus_native_view_ = native_view;
native_wrapper_->NativeViewAttached();
}
void NativeViewHost::Detach() {
DCHECK(native_view_);
native_wrapper_->NativeViewDetaching();
native_view_ = NULL;
focus_native_view_ = NULL;
}
void NativeViewHost::SetPreferredSize(const gfx::Size& size) {
preferred_size_ = size;
PreferredSizeChanged();
}
void NativeViewHost::NativeViewDestroyed() {
// TODO(beng): figure out if this should/could call Detach instead since as it
// stands right now this object is left in an inconsistent state.
native_view_ = NULL;
}
void NativeViewHost::GotNativeFocus() {
// Some NativeViewHost may not have an associated focus view. This is the
// case for containers for example. They might still get the native focus,
// if one non native view they contain gets focused. In that case, we should
// not change the focused view.
if (!focus_view_ || !focus_view_->IsFocusable())
return;
FocusManager* focus_manager = GetFocusManager();
if (!focus_manager) {
NOTREACHED();
return;
}
focus_manager->SetFocusedView(focus_view_);
}
////////////////////////////////////////////////////////////////////////////////
// NativeViewHost, View overrides:
gfx::Size NativeViewHost::GetPreferredSize() {
return preferred_size_;
}
void NativeViewHost::Layout() {
if (!native_view_ || !native_wrapper_.get())
return;
gfx::Rect vis_bounds = GetVisibleBounds();
bool visible = !vis_bounds.IsEmpty();
if (visible && !fast_resize_) {
if (vis_bounds.size() != size()) {
// Only a portion of the Widget is really visible.
int x = vis_bounds.x();
int y = vis_bounds.y();
native_wrapper_->InstallClip(x, y, vis_bounds.width(),
vis_bounds.height());
} else if (native_wrapper_->HasInstalledClip()) {
// The whole widget is visible but we installed a clip on the widget,
// uninstall it.
native_wrapper_->UninstallClip();
}
}
if (visible) {
// Since widgets know nothing about the View hierarchy (they are direct
// children of the Widget that hosts our View hierarchy) they need to be
// positioned in the coordinate system of the Widget, not the current
// view.
gfx::Point top_left;
ConvertPointToWidget(this, &top_left);
native_wrapper_->ShowWidget(top_left.x(), top_left.y(), width(), height());
} else {
native_wrapper_->HideWidget();
}
}
void NativeViewHost::Paint(gfx::Canvas* canvas) {
// The area behind our window is black, so during a fast resize (where our
// content doesn't draw over the full size of our native view, and the native
// view background color doesn't show up), we need to cover that blackness
// with something so that fast resizes don't result in black flash.
//
// It would be nice if this used some approximation of the page's
// current background color.
if (native_wrapper_->HasInstalledClip())
canvas->FillRectInt(SK_ColorWHITE, 0, 0, width(), height());
}
void NativeViewHost::VisibilityChanged(View* starting_from, bool is_visible) {
Layout();
}
void NativeViewHost::VisibleBoundsInRootChanged() {
Layout();
}
void NativeViewHost::ViewHierarchyChanged(bool is_add, View* parent,
View* child) {
if (is_add && GetWidget()) {
if (!native_wrapper_.get())
native_wrapper_.reset(NativeViewHostWrapper::CreateWrapper(this));
native_wrapper_->AddedToWidget();
} else if (!is_add) {
native_wrapper_->RemovedFromWidget();
}
}
std::string NativeViewHost::GetClassName() const {
return kViewClassName;
}
void NativeViewHost::Focus() {
FocusManager* focus_manager = GetFocusManager();
if (!focus_manager) {
NOTREACHED();
return;
}
focus_manager->FocusNativeView(focus_native_view_);
}
} // namespace views
|
