Item.cs source code in C# .NET

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/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / MS / Internal / Shaping / Item.cs / 1 / Item.cs

                            //+------------------------------------------------------------------------ 
//
//  Microsoft Windows Client Platform
//  Copyright (C) Microsoft Corporation, 2001
// 
//  File:      Item.cs
// 
//  Contents:  Avalon item description & script system 
//
//  Created:   12-17-2001 [....] ([....]) 
//
//-----------------------------------------------------------------------

using System; 
using System.Collections;
using System.Globalization; 
 

namespace MS.Internal.Shaping 
{
    /// 
    /// Run sharing the same character properties and glyph variation.
    ///  
    /// 
    /// Generated by itemizer and consumed by shaping engine 
    ///  
    internal struct Item
    { 
        internal Item(
            ScriptID script,
            ItemFlags flags
            ) 
        {
            _script = script; 
            _flags = flags; 
            _digitCulture = null;
        } 

        public static bool operator ==(
            Item left,
            Item right 
            )
        { 
            return left._script == right._script 
                 && left._flags == right._flags;
        } 

        public static bool operator !=(
            Item left,
            Item right 
            )
        { 
            return !(left == right); 
        }
 
        public override bool Equals(object o)
        {
            if (o == null)
                return false; 

            if (o is Item) 
                return this == (Item)o; 

            return false; 
        }

        public override int GetHashCode()
        { 
            return (int)_script ^ (int)Flags;
        } 
 
        /// 
        /// Shaping engine script identifier 
        /// 
        internal ScriptID Script
        {
            get { return _script; } 
            set { _script = value; }
        } 
 

        ///  
        /// Character-based flags for the item
        /// 
        internal ItemFlags Flags
        { 
            get { return _flags; }
            set { _flags = value; } 
        } 

 
        /// 
        /// Digit culture if it's a ScriptID.Digit item and we're doing number
        /// substitution. Otherwise, null.
        ///  
        internal CultureInfo DigitCulture
        { 
            get { return _digitCulture; } 
            set { _digitCulture = value; }
        } 


        private ScriptID        _script;
        private ItemFlags       _flags; 
        private CultureInfo     _digitCulture;
    } 
 
    [Flags]
    internal enum ItemFlags : ushort 
    {
        Default = 0,

        ///  
        /// Display glyph using vertical glyph form
        ///  
        VerticalForm = 0x0001, 

        ///  
        /// Display glyph using glyph of the mirrored code point form
        /// 
        PairMirrorForm = 0x0002,
 
        /// 
        /// Display glyph using mirrored glyph form 
        ///  
        SingleMirrorForm = 0x0004,
 
        /// 
        /// The OR of both variants
        /// 
        GlyphVariant = VerticalForm, 

        ///  
        /// Item displays sideway to the baseline 
        /// 
        DisplaySideway = 0x0008, 

        /// 
        /// Item containing combining marks that need precomposition
        ///  
        HasCombiningMark = 0x0010,
 
        ///  
        /// Item containing extended character
        ///  
        HasExtendedCharacter = 0x0020,

        /// 
        /// Set if the previous item ended with ZWJ 
        /// 
        LeadingJoin = 0x0040, 
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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