1// Copyright 2014 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/javascript_app_modal_event_blocker_x11.h"
6
7#include "chrome/browser/ui/views/frame/browser_view.h"
8#include "ui/aura/env.h"
9#include "ui/aura/window.h"
10#include "ui/events/event.h"
11#include "ui/wm/core/window_animations.h"
12#include "ui/wm/core/window_util.h"
13
14namespace {
15
16// Returns the toplevel window for the deepest transient ancestor of |window|.
17aura::Window* GetTopmostTransientParent(aura::Window* window) {
18  aura::Window* topmost = wm::GetToplevelWindow(window);
19  while (topmost && wm::GetTransientParent(topmost))
20    topmost = wm::GetToplevelWindow(wm::GetTransientParent(topmost));
21  return topmost;
22}
23
24}  // namespace
25
26JavascriptAppModalEventBlockerX11::JavascriptAppModalEventBlockerX11(
27    aura::Window* modal_window)
28    : modal_window_(modal_window),
29      browser_view_with_modal_dialog_(NULL) {
30  aura::Window* topmost_transient_parent =
31      GetTopmostTransientParent(modal_window);
32  browser_view_with_modal_dialog_ =
33      BrowserView::GetBrowserViewForNativeWindow(topmost_transient_parent);
34  // |browser_view_with_modal_dialog_| is NULL if the dialog was opened by an
35  // extension background page.
36
37  aura::Env::GetInstance()->PrependPreTargetHandler(this);
38
39  // WindowModalityController will cancel touches as appropriate.
40}
41
42JavascriptAppModalEventBlockerX11::~JavascriptAppModalEventBlockerX11() {
43  aura::Env::GetInstance()->RemovePreTargetHandler(this);
44}
45
46bool JavascriptAppModalEventBlockerX11::ShouldStopPropagationTo(
47    ui::EventTarget* target) {
48  // Stop propagation if:
49  // -|target| is a browser window or a transient child of a browser window.
50  // -|target| is not the browser window which hosts |modal_window_| and not
51  //  a transient child of that browser window.
52  // WindowModalityController will stop the transient parent from handling the
53  // event if the user clicks the modal window's transient parent (as opposed to
54  // clicking the modal window itself).
55  aura::Window* window =
56      GetTopmostTransientParent(static_cast<aura::Window*>(target));
57  if (!window)
58    return false;
59  BrowserView* browser_view =
60      BrowserView::GetBrowserViewForNativeWindow(window);
61  return browser_view && browser_view != browser_view_with_modal_dialog_;
62}
63
64void JavascriptAppModalEventBlockerX11::OnKeyEvent(ui::KeyEvent* event) {
65  if (ShouldStopPropagationTo(event->target()))
66    event->StopPropagation();
67}
68
69void JavascriptAppModalEventBlockerX11::OnMouseEvent(ui::MouseEvent* event) {
70  if (event->type() != ui::ET_MOUSE_CAPTURE_CHANGED &&
71      ShouldStopPropagationTo(event->target())) {
72    if (event->type() == ui::ET_MOUSE_PRESSED)
73      wm::AnimateWindow(modal_window_, wm::WINDOW_ANIMATION_TYPE_BOUNCE);
74    event->StopPropagation();
75  }
76}
77
78void JavascriptAppModalEventBlockerX11::OnScrollEvent(ui::ScrollEvent* event) {
79  if (ShouldStopPropagationTo(event->target()))
80    event->StopPropagation();
81}
82
83void JavascriptAppModalEventBlockerX11::OnTouchEvent(ui::TouchEvent* event) {
84  if (event->type() != ui::ET_TOUCH_CANCELLED &&
85      ShouldStopPropagationTo(event->target())) {
86    if (event->type() == ui::ET_TOUCH_PRESSED)
87      wm::AnimateWindow(modal_window_, wm::WINDOW_ANIMATION_TYPE_BOUNCE);
88    event->StopPropagation();
89  }
90}
91