chrome/browser/ui/views/javascript_app_modal_event_blocker_x11.cc

   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
  14 namespace {
  15
  16 // Returns the toplevel window for the deepest transient ancestor of |window|.
  17 aura::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
  26 JavascriptAppModalEventBlockerX11::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
  42 JavascriptAppModalEventBlockerX11::~JavascriptAppModalEventBlockerX11() {
  43   aura::Env::GetInstance()->RemovePreTargetHandler(this);
  44 }
  45
  46 bool 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
  64 void JavascriptAppModalEventBlockerX11::OnKeyEvent(ui::KeyEvent* event) {
  65   if (ShouldStopPropagationTo(event->target()))
  66     event->StopPropagation();
  67 }
  68
  69 void 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
  78 void JavascriptAppModalEventBlockerX11::OnScrollEvent(ui::ScrollEvent* event) {
  79   if (ShouldStopPropagationTo(event->target()))
  80     event->StopPropagation();
  81 }
  82
  83 void 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 }