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// Copyright (c) 2014 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.

package org.cef.handler;

import org.cef.browser.CefBrowser;
import org.cef.callback.CefJSDialogCallback;
import org.cef.misc.BoolRef;

/**
 * Implement this interface to handle events related to JavaScript dialogs. The
 * methods of this class will be called on the UI thread.
 */
public interface CefJSDialogHandler {
    /**
     * Supported JavaScript dialog types.
     */
    public static enum JSDialogType {
        JSDIALOGTYPE_ALERT,
        JSDIALOGTYPE_CONFIRM,
        JSDIALOGTYPE_PROMPT,
    }

    /**
     * Called to run a JavaScript dialog. Set suppress_message to true and
     * return false to suppress the message (suppressing messages is preferable
     * to immediately executing the callback as this is used to detect presumably
     * malicious behavior like spamming alert messages in onbeforeunload). Set
     * suppress_message to false and return false to use the default
     * implementation (the default implementation will show one modal dialog at a
     * time and suppress any additional dialog requests until the displayed dialog
     * is dismissed). Return true if the application will use a custom dialog or
     * if the callback has been executed immediately. Custom dialogs may be either
     * modal or modeless. If a custom dialog is used the application must execute
     * callback once the custom dialog is dismissed.
     *
     * @param browser The corresponding browser.
     * @param origin_url The originating url.
     * @param dialog_type the dialog type.
     * @param message_text the text to be displayed.
     * @param default_prompt_text value will be specified for prompt dialogs only.
     * @param callback execute callback once the custom dialog is dismissed.
     * @param suppress_message set to true to suppress displaying the message.
     * @return false to use the default dialog implementation. Return true if the
     * application will use a custom dialog.
     */
    public boolean onJSDialog(CefBrowser browser, String origin_url, JSDialogType dialog_type,
                              String message_text, String default_prompt_text, CefJSDialogCallback callback,
                              BoolRef suppress_message);

    /**
     * Called to run a dialog asking the user if they want to leave a page. Return
     * false to use the default dialog implementation. Return true if the
     * application will use a custom dialog or if the callback has been executed
     * immediately. Custom dialogs may be either modal or modeless. If a custom
     * dialog is used the application must execute callback once the custom
     * dialog is dismissed.
     *
     * @param browser The corresponding browser.
     * @param message_text The text to be displayed.
     * @param is_reload true if the page is reloaded.
     * @param callback execute callback once the custom dialog is dismissed.
     * @return false to use the default dialog implementation. Return true if the
     * application will use a custom dialog.
     */
    public boolean onBeforeUnloadDialog(CefBrowser browser, String message_text, boolean is_reload,
                                        CefJSDialogCallback callback);

    /**
     * Called to cancel any pending dialogs and reset any saved dialog state. Will
     * be called due to events like page navigation irregardless of whether any
     * dialogs are currently pending.
     */
    public void onResetDialogState(CefBrowser browser);

    /**
     * Called when the default implementation dialog is closed.
     */
    public void onDialogClosed(CefBrowser browser);
}