| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/app_modal/app_modal_dialog_queue.h" |
| |
| #include "base/memory/singleton.h" |
| #include "components/app_modal/javascript_app_modal_dialog.h" |
| |
| namespace app_modal { |
| |
| // static |
| AppModalDialogQueue* AppModalDialogQueue::GetInstance() { |
| return base::Singleton<AppModalDialogQueue>::get(); |
| } |
| |
| void AppModalDialogQueue::AddDialog(JavaScriptAppModalDialog* dialog) { |
| if (!active_dialog_) { |
| ShowModalDialog(dialog); |
| return; |
| } |
| app_modal_dialog_queue_.push_back(dialog); |
| } |
| |
| void AppModalDialogQueue::ShowNextDialog() { |
| JavaScriptAppModalDialog* dialog = GetNextDialog(); |
| if (dialog) |
| ShowModalDialog(dialog); |
| else |
| active_dialog_ = nullptr; |
| } |
| |
| void AppModalDialogQueue::ActivateModalDialog() { |
| if (showing_modal_dialog_) { |
| // As part of showing a modal dialog we may end up back in this method |
| // (showing a dialog activates the WebContents, which can trigger a call |
| // to ActivateModalDialog). We ignore such a request as after the call to |
| // activate the tab contents the dialog is shown. |
| return; |
| } |
| if (active_dialog_) |
| active_dialog_->ActivateModalDialog(); |
| } |
| |
| bool AppModalDialogQueue::HasActiveDialog() const { |
| return active_dialog_ != nullptr; |
| } |
| |
| AppModalDialogQueue::AppModalDialogQueue() |
| : active_dialog_(nullptr), showing_modal_dialog_(false) {} |
| |
| AppModalDialogQueue::~AppModalDialogQueue() { |
| } |
| |
| void AppModalDialogQueue::ShowModalDialog(JavaScriptAppModalDialog* dialog) { |
| // Be sure and set the active_dialog_ field first, otherwise if |
| // ShowModalDialog triggers a call back to the queue they'll get the old |
| // dialog. Also, if the dialog calls |ShowNextDialog()| before returning, that |
| // would write nullptr into |active_dialog_| and this function would then undo |
| // that. |
| active_dialog_ = dialog; |
| showing_modal_dialog_ = true; |
| dialog->ShowModalDialog(); |
| showing_modal_dialog_ = false; |
| } |
| |
| JavaScriptAppModalDialog* AppModalDialogQueue::GetNextDialog() { |
| while (!app_modal_dialog_queue_.empty()) { |
| JavaScriptAppModalDialog* dialog = app_modal_dialog_queue_.front(); |
| app_modal_dialog_queue_.pop_front(); |
| if (dialog->IsValid()) |
| return dialog; |
| delete dialog; |
| } |
| return nullptr; |
| } |
| |
| } // namespace app_modal |