1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/ui/views/constrained_window_views.h"
6
7 #include <algorithm>
8
9 #include "chrome/browser/ui/browser_finder.h"
10 #include "components/web_modal/popup_manager.h"
11 #include "components/web_modal/web_contents_modal_dialog_host.h"
12 #include "extensions/browser/guest_view/guest_view_base.h"
13 #include "ui/views/border.h"
14 #include "ui/views/widget/widget.h"
15 #include "ui/views/widget/widget_observer.h"
16 #include "ui/views/window/dialog_delegate.h"
17
18 using web_modal::ModalDialogHost;
19 using web_modal::ModalDialogHostObserver;
20
21 namespace {
22 // The name of a key to store on the window handle to associate
23 // BrowserModalDialogHostObserverViews with the Widget.
24 const char* const kBrowserModalDialogHostObserverViewsKey =
25 "__BROWSER_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";
26
27 // Applies positioning changes from the ModalDialogHost to the Widget.
28 class BrowserModalDialogHostObserverViews
29 : public views::WidgetObserver,
30 public ModalDialogHostObserver {
31 public:
BrowserModalDialogHostObserverViews(ModalDialogHost * host,views::Widget * target_widget,const char * const native_window_property)32 BrowserModalDialogHostObserverViews(ModalDialogHost* host,
33 views::Widget* target_widget,
34 const char *const native_window_property)
35 : host_(host),
36 target_widget_(target_widget),
37 native_window_property_(native_window_property) {
38 DCHECK(host_);
39 DCHECK(target_widget_);
40 host_->AddObserver(this);
41 target_widget_->AddObserver(this);
42 }
43
~BrowserModalDialogHostObserverViews()44 virtual ~BrowserModalDialogHostObserverViews() {
45 if (host_)
46 host_->RemoveObserver(this);
47 target_widget_->RemoveObserver(this);
48 target_widget_->SetNativeWindowProperty(native_window_property_, NULL);
49 }
50
51 // WidgetObserver overrides
OnWidgetClosing(views::Widget * widget)52 virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE {
53 delete this;
54 }
55
56 // WebContentsModalDialogHostObserver overrides
OnPositionRequiresUpdate()57 virtual void OnPositionRequiresUpdate() OVERRIDE {
58 UpdateBrowserModalDialogPosition(target_widget_, host_);
59 }
60
OnHostDestroying()61 virtual void OnHostDestroying() OVERRIDE {
62 host_->RemoveObserver(this);
63 host_ = NULL;
64 }
65
66 private:
67 ModalDialogHost* host_;
68 views::Widget* target_widget_;
69 const char* const native_window_property_;
70
71 DISALLOW_COPY_AND_ASSIGN(BrowserModalDialogHostObserverViews);
72 };
73
UpdateModalDialogPosition(views::Widget * widget,web_modal::ModalDialogHost * dialog_host,const gfx::Size & size)74 void UpdateModalDialogPosition(views::Widget* widget,
75 web_modal::ModalDialogHost* dialog_host,
76 const gfx::Size& size) {
77 // Do not forcibly update the dialog widget position if it is being dragged.
78 if (widget->HasCapture())
79 return;
80
81 gfx::Point position = dialog_host->GetDialogPosition(size);
82 views::Border* border = widget->non_client_view()->frame_view()->border();
83 // Border may be null during widget initialization.
84 if (border) {
85 // Align the first row of pixels inside the border. This is the apparent
86 // top of the dialog.
87 position.set_y(position.y() - border->GetInsets().top());
88 }
89
90 if (widget->is_top_level()) {
91 position +=
92 views::Widget::GetWidgetForNativeView(dialog_host->GetHostView())->
93 GetClientAreaBoundsInScreen().OffsetFromOrigin();
94 }
95
96 widget->SetBounds(gfx::Rect(position, size));
97 }
98
99 } // namespace
100
UpdateWebContentsModalDialogPosition(views::Widget * widget,web_modal::WebContentsModalDialogHost * dialog_host)101 void UpdateWebContentsModalDialogPosition(
102 views::Widget* widget,
103 web_modal::WebContentsModalDialogHost* dialog_host) {
104 gfx::Size size = widget->GetRootView()->GetPreferredSize();
105 gfx::Size max_size = dialog_host->GetMaximumDialogSize();
106 // Enlarge the max size by the top border, as the dialog will be shifted
107 // outside the area specified by the dialog host by this amount later.
108 views::Border* border =
109 widget->non_client_view()->frame_view()->border();
110 // Border may be null during widget initialization.
111 if (border)
112 max_size.Enlarge(0, border->GetInsets().top());
113 size.SetToMin(max_size);
114 UpdateModalDialogPosition(widget, dialog_host, size);
115 }
116
UpdateBrowserModalDialogPosition(views::Widget * widget,web_modal::ModalDialogHost * dialog_host)117 void UpdateBrowserModalDialogPosition(views::Widget* widget,
118 web_modal::ModalDialogHost* dialog_host) {
119 UpdateModalDialogPosition(widget, dialog_host,
120 widget->GetRootView()->GetPreferredSize());
121 }
122
ShowWebModalDialogViews(views::WidgetDelegate * dialog,content::WebContents * initiator_web_contents)123 views::Widget* ShowWebModalDialogViews(
124 views::WidgetDelegate* dialog,
125 content::WebContents* initiator_web_contents) {
126 extensions::GuestViewBase* guest_view =
127 extensions::GuestViewBase::FromWebContents(initiator_web_contents);
128 // For embedded WebContents, use the embedder's WebContents for constrained
129 // window.
130 content::WebContents* web_contents =
131 guest_view && guest_view->embedder_web_contents() ?
132 guest_view->embedder_web_contents() : initiator_web_contents;
133 views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
134 web_modal::PopupManager* popup_manager =
135 web_modal::PopupManager::FromWebContents(web_contents);
136 popup_manager->ShowModalDialog(widget->GetNativeWindow(), web_contents);
137 return widget;
138 }
139
CreateWebModalDialogViews(views::WidgetDelegate * dialog,content::WebContents * web_contents)140 views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,
141 content::WebContents* web_contents) {
142 DCHECK_EQ(ui::MODAL_TYPE_CHILD, dialog->GetModalType());
143 web_modal::PopupManager* popup_manager =
144 web_modal::PopupManager::FromWebContents(web_contents);
145 const gfx::NativeWindow parent = popup_manager->GetHostView();
146 return views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent);
147 }
148
149 // TODO(gbillock): Replace this with PopupManager calls.
CreateBrowserModalDialogViews(views::DialogDelegate * dialog,gfx::NativeWindow parent)150 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
151 gfx::NativeWindow parent) {
152 views::Widget* widget =
153 views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent);
154 if (!dialog->UseNewStyleForThisDialog())
155 return widget;
156
157 // Get the browser dialog management and hosting components from |parent|.
158 Browser* browser = chrome::FindBrowserWithWindow(parent);
159 if (browser) {
160 ChromeWebModalDialogManagerDelegate* manager = browser;
161 ModalDialogHost* host = manager->GetWebContentsModalDialogHost();
162 DCHECK_EQ(parent, host->GetHostView());
163 ModalDialogHostObserver* dialog_host_observer =
164 new BrowserModalDialogHostObserverViews(
165 host, widget, kBrowserModalDialogHostObserverViewsKey);
166 dialog_host_observer->OnPositionRequiresUpdate();
167 }
168 return widget;
169 }
170