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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/views/javascript_app_modal_event_blocker.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/events/event.h"
#include "ui/wm/core/window_animations.h"
#include "ui/wm/core/window_util.h"
namespace {
// Returns the toplevel window for the deepest transient ancestor of |window|.
aura::Window* GetTopmostTransientParent(aura::Window* window) {
aura::Window* topmost = wm::GetToplevelWindow(window);
while (topmost && wm::GetTransientParent(topmost))
topmost = wm::GetToplevelWindow(wm::GetTransientParent(topmost));
return topmost;
}
} // namespace
JavascriptAppModalEventBlockerAura::JavascriptAppModalEventBlockerAura(
aura::Window* modal_window)
: modal_window_(modal_window), browser_view_with_modal_dialog_(nullptr) {
aura::Window* topmost_transient_parent =
GetTopmostTransientParent(modal_window);
browser_view_with_modal_dialog_ =
BrowserView::GetBrowserViewForNativeWindow(topmost_transient_parent);
// |browser_view_with_modal_dialog_| is nullptr if the dialog was opened by an
// extension background page.
aura::Env::GetInstance()->AddPreTargetHandler(
this, ui::EventTarget::Priority::kSystem);
// WindowModalityController will cancel touches as appropriate.
}
JavascriptAppModalEventBlockerAura::~JavascriptAppModalEventBlockerAura() {
aura::Env::GetInstance()->RemovePreTargetHandler(this);
}
bool JavascriptAppModalEventBlockerAura::ShouldStopPropagationTo(
ui::EventTarget* target) {
// Stop propagation if:
// -|target| is a browser window or a transient child of a browser window.
// -|target| is not the browser window which hosts |modal_window_| and not
// a transient child of that browser window.
// WindowModalityController will stop the transient parent from handling the
// event if the user clicks the modal window's transient parent (as opposed to
// clicking the modal window itself).
aura::Window* window =
GetTopmostTransientParent(static_cast<aura::Window*>(target));
if (!window)
return false;
BrowserView* browser_view =
BrowserView::GetBrowserViewForNativeWindow(window);
return browser_view && browser_view != browser_view_with_modal_dialog_;
}
void JavascriptAppModalEventBlockerAura::OnKeyEvent(ui::KeyEvent* event) {
if (ShouldStopPropagationTo(event->target()))
event->StopPropagation();
}
void JavascriptAppModalEventBlockerAura::OnMouseEvent(ui::MouseEvent* event) {
if (event->type() != ui::ET_MOUSE_CAPTURE_CHANGED &&
ShouldStopPropagationTo(event->target())) {
if (event->type() == ui::ET_MOUSE_PRESSED)
wm::AnimateWindow(modal_window_, wm::WINDOW_ANIMATION_TYPE_BOUNCE);
event->StopPropagation();
}
}
void JavascriptAppModalEventBlockerAura::OnScrollEvent(ui::ScrollEvent* event) {
if (ShouldStopPropagationTo(event->target()))
event->StopPropagation();
}
void JavascriptAppModalEventBlockerAura::OnTouchEvent(ui::TouchEvent* event) {
if (event->type() != ui::ET_TOUCH_CANCELLED &&
ShouldStopPropagationTo(event->target())) {
if (event->type() == ui::ET_TOUCH_PRESSED)
wm::AnimateWindow(modal_window_, wm::WINDOW_ANIMATION_TYPE_BOUNCE);
event->StopPropagation();
}
}
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