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/guest_view/web_view/web_view_guest.h"
10 #include "chrome/browser/ui/browser_finder.h"
11 #include "components/web_modal/web_contents_modal_dialog_host.h"
12 #include "components/web_modal/web_contents_modal_dialog_manager.h"
13 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
14 #include "ui/views/border.h"
15 #include "ui/views/widget/widget.h"
16 #include "ui/views/widget/widget_observer.h"
17 #include "ui/views/window/dialog_delegate.h"
18
19 using web_modal::ModalDialogHost;
20 using web_modal::ModalDialogHostObserver;
21
22 namespace {
23 // The name of a key to store on the window handle to associate
24 // BrowserModalDialogHostObserverViews with the Widget.
25 const char* const kBrowserModalDialogHostObserverViewsKey =
26 "__BROWSER_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";
27
28 // Applies positioning changes from the ModalDialogHost to the Widget.
29 class BrowserModalDialogHostObserverViews
30 : public views::WidgetObserver,
31 public ModalDialogHostObserver {
32 public:
BrowserModalDialogHostObserverViews(ModalDialogHost * host,views::Widget * target_widget,const char * const native_window_property)33 BrowserModalDialogHostObserverViews(ModalDialogHost* host,
34 views::Widget* target_widget,
35 const char *const native_window_property)
36 : host_(host),
37 target_widget_(target_widget),
38 native_window_property_(native_window_property) {
39 DCHECK(host_);
40 DCHECK(target_widget_);
41 host_->AddObserver(this);
42 target_widget_->AddObserver(this);
43 }
44
~BrowserModalDialogHostObserverViews()45 virtual ~BrowserModalDialogHostObserverViews() {
46 if (host_)
47 host_->RemoveObserver(this);
48 target_widget_->RemoveObserver(this);
49 target_widget_->SetNativeWindowProperty(native_window_property_, NULL);
50 }
51
52 // WidgetObserver overrides
OnWidgetClosing(views::Widget * widget)53 virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE {
54 delete this;
55 }
56
57 // WebContentsModalDialogHostObserver overrides
OnPositionRequiresUpdate()58 virtual void OnPositionRequiresUpdate() OVERRIDE {
59 UpdateBrowserModalDialogPosition(target_widget_, host_);
60 }
61
OnHostDestroying()62 virtual void OnHostDestroying() OVERRIDE {
63 host_->RemoveObserver(this);
64 host_ = NULL;
65 }
66
67 private:
68 ModalDialogHost* host_;
69 views::Widget* target_widget_;
70 const char* const native_window_property_;
71
72 DISALLOW_COPY_AND_ASSIGN(BrowserModalDialogHostObserverViews);
73 };
74
UpdateModalDialogPosition(views::Widget * widget,web_modal::ModalDialogHost * dialog_host,const gfx::Size & size)75 void UpdateModalDialogPosition(views::Widget* widget,
76 web_modal::ModalDialogHost* dialog_host,
77 const gfx::Size& size) {
78 // Do not forcibly update the dialog widget position if it is being dragged.
79 if (widget->HasCapture())
80 return;
81
82 gfx::Point position = dialog_host->GetDialogPosition(size);
83 views::Border* border = widget->non_client_view()->frame_view()->border();
84 // Border may be null during widget initialization.
85 if (border) {
86 // Align the first row of pixels inside the border. This is the apparent
87 // top of the dialog.
88 position.set_y(position.y() - border->GetInsets().top());
89 }
90
91 if (widget->is_top_level()) {
92 position +=
93 views::Widget::GetWidgetForNativeView(dialog_host->GetHostView())->
94 GetClientAreaBoundsInScreen().OffsetFromOrigin();
95 }
96
97 widget->SetBounds(gfx::Rect(position, size));
98 }
99
100 } // namespace
101
UpdateWebContentsModalDialogPosition(views::Widget * widget,web_modal::WebContentsModalDialogHost * dialog_host)102 void UpdateWebContentsModalDialogPosition(
103 views::Widget* widget,
104 web_modal::WebContentsModalDialogHost* dialog_host) {
105 gfx::Size size = widget->GetRootView()->GetPreferredSize();
106 gfx::Size max_size = dialog_host->GetMaximumDialogSize();
107 // Enlarge the max size by the top border, as the dialog will be shifted
108 // outside the area specified by the dialog host by this amount later.
109 views::Border* border =
110 widget->non_client_view()->frame_view()->border();
111 // Border may be null during widget initialization.
112 if (border)
113 max_size.Enlarge(0, border->GetInsets().top());
114 size.SetToMin(max_size);
115 UpdateModalDialogPosition(widget, dialog_host, size);
116 }
117
UpdateBrowserModalDialogPosition(views::Widget * widget,web_modal::ModalDialogHost * dialog_host)118 void UpdateBrowserModalDialogPosition(views::Widget* widget,
119 web_modal::ModalDialogHost* dialog_host) {
120 UpdateModalDialogPosition(widget, dialog_host,
121 widget->GetRootView()->GetPreferredSize());
122 }
123
ShowWebModalDialogViews(views::WidgetDelegate * dialog,content::WebContents * initiator_web_contents)124 views::Widget* ShowWebModalDialogViews(
125 views::WidgetDelegate* dialog,
126 content::WebContents* initiator_web_contents) {
127 WebViewGuest* web_view_guest = WebViewGuest::FromWebContents(
128 initiator_web_contents);
129 // For embedded WebContents, use the embedder's WebContents for constrained
130 // window.
131 content::WebContents* web_contents =
132 web_view_guest && web_view_guest->embedder_web_contents() ?
133 web_view_guest->embedder_web_contents() : initiator_web_contents;
134 views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
135 web_modal::WebContentsModalDialogManager::FromWebContents(web_contents)->
136 ShowModalDialog(widget->GetNativeWindow());
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::WebContentsModalDialogManager* manager =
144 web_modal::WebContentsModalDialogManager::FromWebContents(web_contents);
145 const gfx::NativeWindow parent =
146 manager->delegate()->GetWebContentsModalDialogHost()->GetHostView();
147 return views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent);
148 }
149
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