mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-14 02:31:59 +00:00
92 lines
3.3 KiB
Plaintext
92 lines
3.3 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; 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 nsISimpleEnumerator;
|
|
|
|
/**
|
|
* nsIArray
|
|
*
|
|
* An indexed collection of elements. Provides basic functionality for
|
|
* retrieving elements at a specific position, searching for
|
|
* elements. Indexes are zero-based, such that the last element in the
|
|
* array is stored at the index length-1.
|
|
*
|
|
* For an array which can be modified, see nsIMutableArray below.
|
|
*
|
|
* Neither interface makes any attempt to protect the individual
|
|
* elements from modification. The convention is that the elements of
|
|
* the array should not be modified. Documentation within a specific
|
|
* interface should describe variations from this convention.
|
|
*
|
|
* It is also convention that if an interface provides access to an
|
|
* nsIArray, that the array should not be QueryInterfaced to an
|
|
* nsIMutableArray for modification. If the interface in question had
|
|
* intended the array to be modified, it would have returned an
|
|
* nsIMutableArray!
|
|
*
|
|
* null is a valid entry in the array, and as such any nsISupports
|
|
* parameters may be null, except where noted.
|
|
*/
|
|
[scriptable, uuid(114744d9-c369-456e-b55a-52fe52880d2d)]
|
|
interface nsIArray : nsISupports
|
|
{
|
|
/**
|
|
* length
|
|
*
|
|
* number of elements in the array.
|
|
*/
|
|
readonly attribute unsigned long length;
|
|
|
|
/**
|
|
* queryElementAt()
|
|
*
|
|
* Retrieve a specific element of the array, and QueryInterface it
|
|
* to the specified interface. null is a valid result for
|
|
* this method, but exceptions are thrown in other circumstances
|
|
*
|
|
* @param index position of element
|
|
* @param uuid the IID of the requested interface
|
|
* @param result the object, QI'd to the requested interface
|
|
*
|
|
* @throws NS_ERROR_NO_INTERFACE when an entry exists at the
|
|
* specified index, but the requested interface is not
|
|
* available.
|
|
* @throws NS_ERROR_ILLEGAL_VALUE when index > length-1
|
|
*
|
|
*/
|
|
void queryElementAt(in unsigned long index,
|
|
in nsIIDRef uuid,
|
|
[iid_is(uuid), retval] out nsQIResult result);
|
|
|
|
/**
|
|
* indexOf()
|
|
*
|
|
* Get the position of a specific element. Note that since null is
|
|
* a valid input, exceptions are used to indicate that an element
|
|
* is not found.
|
|
*
|
|
* @param startIndex The initial element to search in the array
|
|
* To start at the beginning, use 0 as the
|
|
* startIndex
|
|
* @param element The element you are looking for
|
|
* @returns a number >= startIndex which is the position of the
|
|
* element in the array.
|
|
* @throws NS_ERROR_FAILURE if the element was not in the array.
|
|
*/
|
|
unsigned long indexOf(in unsigned long startIndex,
|
|
in nsISupports element);
|
|
|
|
/**
|
|
* enumerate the array
|
|
*
|
|
* @returns a new enumerator positioned at the start of the array
|
|
* @throws NS_ERROR_FAILURE if the array is empty (to make it easy
|
|
* to detect errors), or NS_ERROR_OUT_OF_MEMORY if out of memory.
|
|
*/
|
|
nsISimpleEnumerator enumerate();
|
|
};
|