/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIDOMWindow;

/**
 * This is the interface to the embeddable prompt service; the service that
 * implements nsIPrompt.  Its interface is designed to be just nsIPrompt, each
 * method modified to take a parent window parameter.
 *
 * Accesskeys can be attached to buttons and checkboxes by inserting an &
 * before the accesskey character in the checkbox message or button title.  For
 * a real &, use && instead.  (A "button title" generally refers to the text
 * label of a button.)
 *
 * One note: in all cases, the parent window parameter can be null.  However,
 * these windows are all intended to have parents.  So when no parent is
 * specified, the implementation should try hard to find a suitable foster
 * parent.
 *
 * Implementations are free to choose how they present the various button
 * types.  For example, while prompts that give the user a choice between OK
 * and Cancel are required to return a boolean value indicating whether or not
 * the user accepted the prompt (pressed OK) or rejected the prompt (pressed
 * Cancel), the implementation of this interface could very well speak the
 * prompt to the user instead of rendering any visual user-interface.  The
 * standard button types are merely idioms used to convey the nature of the
 * choice the user is to make.
 *
 * Because implementations of this interface may loosely interpret the various
 * button types, it is advised that text messages passed to these prompts do
 * not refer to the button types by name.  For example, it is inadvisable to
 * tell the user to "Press OK to proceed."  Instead, such a prompt might be
 * rewritten to ask the user: "Would you like to proceed?"
 */
[scriptable, uuid(1630C61A-325E-49ca-8759-A31B16C47AA5)]
interface nsIPromptService : nsISupports
{
  /**
   * Puts up an alert dialog with an OK button.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   */
  void alert(in nsIDOMWindow aParent,
             in wstring aDialogTitle,
             in wstring aText);

  /**
   * Puts up an alert dialog with an OK button and a labeled checkbox.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aCheckMsg
   *        Text to appear with the checkbox.
   * @param aCheckState
   *        Contains the initial checked state of the checkbox when this method
   *        is called and the final checked state after this method returns.
   */
  void alertCheck(in nsIDOMWindow aParent,
                  in wstring aDialogTitle,
                  in wstring aText,
                  in wstring aCheckMsg,
                  inout boolean aCheckState);

  /**
   * Puts up a dialog with OK and Cancel buttons.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   *
   * @return true for OK, false for Cancel
   */
  boolean confirm(in nsIDOMWindow aParent,
                  in wstring aDialogTitle,
                  in wstring aText);

  /**
   * Puts up a dialog with OK and Cancel buttons and a labeled checkbox.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aCheckMsg
   *        Text to appear with the checkbox.
   * @param aCheckState
   *        Contains the initial checked state of the checkbox when this method
   *        is called and the final checked state after this method returns.
   *
   * @return true for OK, false for Cancel
   */
  boolean confirmCheck(in nsIDOMWindow aParent,
                       in wstring aDialogTitle,
                       in wstring aText,
                       in wstring aCheckMsg,
                       inout boolean aCheckState);

  /**
   * Button Flags
   *
   * The following flags are combined to form the aButtonFlags parameter passed
   * to confirmEx.  See confirmEx for more information on how the flags may be
   * combined.
   */
   
  /**
   * Button Position Flags
   */
  const unsigned long BUTTON_POS_0              = 1;
  const unsigned long BUTTON_POS_1              = 1 << 8;
  const unsigned long BUTTON_POS_2              = 1 << 16;
     
  /**
   * Button Title Flags (used to set the labels of buttons in the prompt)
   */
  const unsigned long BUTTON_TITLE_OK            = 1;
  const unsigned long BUTTON_TITLE_CANCEL        = 2;
  const unsigned long BUTTON_TITLE_YES           = 3;
  const unsigned long BUTTON_TITLE_NO            = 4;
  const unsigned long BUTTON_TITLE_SAVE          = 5;
  const unsigned long BUTTON_TITLE_DONT_SAVE     = 6;
  const unsigned long BUTTON_TITLE_REVERT        = 7;
  const unsigned long BUTTON_TITLE_IS_STRING     = 127;
  
  /**
   * Button Default Flags (used to select which button is the default one)
   */
  const unsigned long BUTTON_POS_0_DEFAULT       = 0;
  const unsigned long BUTTON_POS_1_DEFAULT       = 1 << 24;
  const unsigned long BUTTON_POS_2_DEFAULT       = 1 << 25;

  /**
   * Causes the buttons to be initially disabled.  They are enabled after a
   * timeout expires.  The implementation may interpret this loosely as the
   * intent is to ensure that the user does not click through a security dialog
   * too quickly.  Strictly speaking, the implementation could choose to ignore
   * this flag.
   */
  const unsigned long BUTTON_DELAY_ENABLE        = 1 << 26;

  /**
   * Selects the standard set of OK/Cancel buttons.
   */
  const unsigned long STD_OK_CANCEL_BUTTONS      = (BUTTON_TITLE_OK     * BUTTON_POS_0) +
                                                   (BUTTON_TITLE_CANCEL * BUTTON_POS_1);

  /**
   * Selects the standard set of Yes/No buttons.
   */
  const unsigned long STD_YES_NO_BUTTONS         = (BUTTON_TITLE_YES * BUTTON_POS_0) +
                                                   (BUTTON_TITLE_NO  * BUTTON_POS_1);


  /**
   * Puts up a dialog with up to 3 buttons and an optional, labeled checkbox.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aButtonFlags
   *        A combination of Button Flags.
   * @param aButton0Title
   *        Used when button 0 uses TITLE_IS_STRING
   * @param aButton1Title
   *        Used when button 1 uses TITLE_IS_STRING
   * @param aButton2Title
   *        Used when button 2 uses TITLE_IS_STRING
   * @param aCheckMsg
   *        Text to appear with the checkbox.  Null if no checkbox.
   * @param aCheckState    
   *        Contains the initial checked state of the checkbox when this method
   *        is called and the final checked state after this method returns.
   *
   * @return index of the button pressed.
   *
   * Buttons are numbered 0 - 2. The implementation can decide whether the
   * sequence goes from right to left or left to right.  Button 0 is the
   * default button unless one of the Button Default Flags is specified.
   *
   * A button may use a predefined title, specified by one of the Button Title
   * Flags values.  Each title value can be multiplied by a position value to
   * assign the title to a particular button.  If BUTTON_TITLE_IS_STRING is
   * used for a button, the string parameter for that button will be used.  If
   * the value for a button position is zero, the button will not be shown.
   *
   * In general, aButtonFlags is constructed per the following example:
   *
   *   aButtonFlags = (BUTTON_POS_0) * (BUTTON_TITLE_AAA) +
   *                  (BUTTON_POS_1) * (BUTTON_TITLE_BBB) +
   *                   BUTTON_POS_1_DEFAULT;
   *
   * where "AAA" and "BBB" correspond to one of the button titles.
   */
  PRInt32 confirmEx(in nsIDOMWindow aParent,
                    in wstring aDialogTitle,
                    in wstring aText,
                    in unsigned long aButtonFlags,
                    in wstring aButton0Title,
                    in wstring aButton1Title,
                    in wstring aButton2Title,
                    in wstring aCheckMsg,
                    inout boolean aCheckState);

  /**
   * Puts up a dialog with an edit field and an optional, labeled checkbox.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aValue
   *        Contains the default value for the dialog field when this method
   *        is called (null value is ok).  Upon return, if the user pressed
   *        OK, then this parameter contains a newly allocated string value.
   *        Otherwise, the parameter's value is unmodified.
   * @param aCheckMsg
   *        Text to appear with the checkbox.  If null, check box will not be shown.
   * @param aCheckState
   *        Contains the initial checked state of the checkbox when this method
   *        is called and the final checked state after this method returns.
   *
   * @return true for OK, false for Cancel.
   */                        
  boolean prompt(in nsIDOMWindow aParent,
                 in wstring aDialogTitle,
                 in wstring aText,
                 inout wstring aValue, 
                 in wstring aCheckMsg,
                 inout boolean aCheckState);

  /**
   * Puts up a dialog with an edit field, a password field, and an optional,
   * labeled checkbox.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aUsername
   *        Contains the default value for the username field when this method
   *        is called (null value is ok).  Upon return, if the user pressed OK,
   *        then this parameter contains a newly allocated string value.
   *        Otherwise, the parameter's value is unmodified.
   * @param aPassword
   *        Contains the default value for the password field when this method
   *        is called (null value is ok).  Upon return, if the user pressed OK,
   *        then this parameter contains a newly allocated string value.
   *        Otherwise, the parameter's value is unmodified.
   * @param aCheckMsg
   *        Text to appear with the checkbox.  If null, check box will not be shown.
   * @param aCheckState
   *        Contains the initial checked state of the checkbox when this method
   *        is called and the final checked state after this method returns.
   *
   * @return true for OK, false for Cancel.
   */                        
  boolean promptUsernameAndPassword(in nsIDOMWindow aParent,
                                    in wstring aDialogTitle,
                                    in wstring aText,
                                    inout wstring aUsername,
                                    inout wstring aPassword,
                                    in wstring aCheckMsg,
                                    inout boolean aCheckState);

  /**
   * Puts up a dialog with a password field and an optional, labeled checkbox.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aPassword
   *        Contains the default value for the password field when this method
   *        is called (null value is ok).  Upon return, if the user pressed OK,
   *        then this parameter contains a newly allocated string value.
   *        Otherwise, the parameter's value is unmodified.
   * @param aCheckMsg
   *        Text to appear with the checkbox.  If null, check box will not be shown.
   * @param aCheckState
   *        Contains the initial checked state of the checkbox when this method
   *        is called and the final checked state after this method returns.
   *
   * @return true for OK, false for Cancel.
   */                        
  boolean promptPassword(in nsIDOMWindow aParent,
                         in wstring aDialogTitle,
                         in wstring aText,
                         inout wstring aPassword,
                         in wstring aCheckMsg,
                         inout boolean aCheckState);

  /**
   * Puts up a dialog box which has a list box of strings from which the user
   * may make a single selection.
   *
   * @param aParent
   *        The parent window or null.
   * @param aDialogTitle
   *        Text to appear in the title of the dialog.
   * @param aText
   *        Text to appear in the body of the dialog.
   * @param aCount
   *        The length of the aSelectList array parameter.
   * @param aSelectList
   *        The list of strings to display.
   * @param aOutSelection
   *        Contains the index of the selected item in the list when this
   *        method returns true.
   *
   * @return true for OK, false for Cancel.
   */                                                 
  boolean select(in nsIDOMWindow aParent,
                 in wstring aDialogTitle,
                 in wstring aText,
                 in  PRUint32 aCount,
                 [array, size_is(aCount)] in wstring aSelectList,
                 out long aOutSelection);
};
