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| 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 "components/app_modal_dialogs/app_modal_dialog_queue.h" | |
| 6 | |
| 7 #include "base/memory/singleton.h" | |
| 8 #include "components/app_modal_dialogs/app_modal_dialog.h" | |
| 9 | |
| 10 // static | |
| 11 AppModalDialogQueue* AppModalDialogQueue::GetInstance() { | |
| 12 return Singleton<AppModalDialogQueue>::get(); | |
| 13 } | |
| 14 | |
| 15 void AppModalDialogQueue::AddDialog(AppModalDialog* dialog) { | |
| 16 if (!active_dialog_) { | |
| 17 ShowModalDialog(dialog); | |
| 18 return; | |
| 19 } | |
| 20 app_modal_dialog_queue_.push_back(dialog); | |
| 21 } | |
| 22 | |
| 23 void AppModalDialogQueue::ShowNextDialog() { | |
| 24 AppModalDialog* dialog = GetNextDialog(); | |
| 25 if (dialog) | |
| 26 ShowModalDialog(dialog); | |
| 27 else | |
| 28 active_dialog_ = NULL; | |
| 29 } | |
| 30 | |
| 31 void AppModalDialogQueue::ActivateModalDialog() { | |
| 32 if (showing_modal_dialog_) { | |
| 33 // As part of showing a modal dialog we may end up back in this method | |
| 34 // (showing a dialog activates the WebContents, which can trigger a call | |
| 35 // to ActivateModalDialog). We ignore such a request as after the call to | |
| 36 // activate the tab contents the dialog is shown. | |
| 37 return; | |
| 38 } | |
| 39 if (active_dialog_) | |
| 40 active_dialog_->ActivateModalDialog(); | |
| 41 } | |
| 42 | |
| 43 bool AppModalDialogQueue::HasActiveDialog() const { | |
| 44 return active_dialog_ != NULL; | |
| 45 } | |
| 46 | |
| 47 AppModalDialogQueue::AppModalDialogQueue() | |
| 48 : active_dialog_(NULL), | |
| 49 showing_modal_dialog_(false) { | |
| 50 } | |
| 51 | |
| 52 AppModalDialogQueue::~AppModalDialogQueue() { | |
| 53 } | |
| 54 | |
| 55 void AppModalDialogQueue::ShowModalDialog(AppModalDialog* dialog) { | |
| 56 // Be sure and set the active_dialog_ field first, otherwise if | |
| 57 // ShowModalDialog triggers a call back to the queue they'll get the old | |
| 58 // dialog. Also, if the dialog calls |ShowNextDialog()| before returning, that | |
| 59 // would write NULL into |active_dialog_| and this function would then undo | |
| 60 // that. | |
| 61 active_dialog_ = dialog; | |
| 62 showing_modal_dialog_ = true; | |
| 63 dialog->ShowModalDialog(); | |
| 64 showing_modal_dialog_ = false; | |
| 65 } | |
| 66 | |
| 67 AppModalDialog* AppModalDialogQueue::GetNextDialog() { | |
| 68 while (!app_modal_dialog_queue_.empty()) { | |
| 69 AppModalDialog* dialog = app_modal_dialog_queue_.front(); | |
| 70 app_modal_dialog_queue_.pop_front(); | |
| 71 if (dialog->IsValid()) | |
| 72 return dialog; | |
| 73 delete dialog; | |
| 74 } | |
| 75 return NULL; | |
| 76 } | |
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