/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 * Copyright (C) 2009 Google Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// This is based on the W3C standard HTML Editing APIs
// https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html#selection
//
// FIXME: Fix discrepancies from the standard, especially
// * unsigned types where should be unsigned
// * Nullability
// * RemoveRange(Range range) method
// http://crbug.com/391673
[
    ImplementedAs=DOMSelection,
    WillBeGarbageCollected,
] interface Selection {
    readonly attribute Node anchorNode;
    readonly attribute long anchorOffset;
    readonly attribute Node focusNode;
    readonly attribute long focusOffset;

    readonly attribute boolean isCollapsed;
    [RaisesException] void collapse(Node? node, optional long offset = 0);
    [RaisesException] void collapseToStart();
    [RaisesException] void collapseToEnd();

    // We mark offset as optional, defaulting to 0; this differs from spec.
    // http://crbug.com/384966
    [RaisesException, TypeChecking=Interface] void extend(Node node, optional long offset = 0);

    [RaisesException] void selectAllChildren([Default=Undefined] optional Node node);
    [CustomElementCallbacks] void deleteFromDocument();

    readonly attribute long rangeCount;
    [RaisesException] Range getRangeAt([Default=Undefined] optional long index);
    void addRange([Default=Undefined] optional Range range);
    void removeAllRanges();

    [NotEnumerable] stringifier;

    // Firefox extensions
    // https://developer.mozilla.org/En/DOM/Selection
    //
    [MeasureAs=SelectionContainsNode] boolean containsNode([Default = Undefined] optional Node node, [Default = Undefined] optional boolean allowPartial);

    // WebKit extensions
    [MeasureAs=SelectionBaseNode] readonly attribute Node baseNode;
    [MeasureAs=SelectionBaseOffset] readonly attribute long baseOffset;
    [MeasureAs=SelectionExtentNode] readonly attribute Node extentNode;
    [MeasureAs=SelectionExtentOffset] readonly attribute long extentOffset;

    // WebKit's "type" accessor returns "None", "Range" and "Caret"
    // IE's type accessor returns "none", "text" and "control"
    [MeasureAs=SelectionType] readonly attribute DOMString type;

    [MeasureAs=SelectionModify] void modify([Default=Undefined] optional DOMString alter,
                                            [Default=Undefined] optional DOMString direction,
                                            [Default=Undefined] optional DOMString granularity);
    [MeasureAs=SelectionSetBaseAndExtent, RaisesException] void setBaseAndExtent([Default=Undefined] optional Node baseNode,
                                                                                 [Default=Undefined] optional long baseOffset,
                                                                                 [Default=Undefined] optional Node extentNode,
                                                                                 [Default=Undefined] optional long extentOffset);
    [ImplementedAs=collapse, MeasureAs=SelectionSetPosition, RaisesException] void setPosition(Node? node, optional long offset = 0);

    // IE extensions
    // http://msdn.microsoft.com/en-us/library/ms535869(VS.85).aspx
    [MeasureAs=SelectionEmpty] void empty();
};