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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/javascript_dialogs/app_modal_dialog_queue.h"
#include "base/memory/singleton.h"
#include "components/javascript_dialogs/app_modal_dialog_controller.h"
namespace javascript_dialogs {
// static
AppModalDialogQueue* AppModalDialogQueue::GetInstance() {
return base::Singleton<AppModalDialogQueue>::get();
}
void AppModalDialogQueue::AddDialog(AppModalDialogController* dialog) {
if (!active_dialog_) {
ShowModalDialog(dialog);
return;
}
app_modal_dialog_queue_.push_back(dialog);
}
void AppModalDialogQueue::ShowNextDialog() {
AppModalDialogController* 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() = default;
void AppModalDialogQueue::ShowModalDialog(AppModalDialogController* 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;
}
AppModalDialogController* AppModalDialogQueue::GetNextDialog() {
while (!app_modal_dialog_queue_.empty()) {
AppModalDialogController* dialog = app_modal_dialog_queue_.front();
app_modal_dialog_queue_.pop_front();
if (dialog->IsValid())
return dialog;
delete dialog;
}
return nullptr;
}
} // namespace javascript_dialogs
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