FontEmbeddingManager.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / FontEmbeddingManager.cs / 1305600 / FontEmbeddingManager.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (c) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: The FontEmbeddingManager class handles physical and composite font embedding. 
//
//              See spec at http://avalon/text/DesignDocsAndSpecs/Font%20embedding%20APIs.htm 
//
//
// History:
//  01/27/2004 : mleonov - Created 
//
//--------------------------------------------------------------------------- 
 
using System;
using System.Text; 
using System.IO;
using System.Globalization;
using System.Collections;
using System.Collections.Generic; 
using System.Diagnostics;
using System.Windows; 
 
using MS.Internal.FontCache;
using MS.Internal.FontFace; 
using MS.Internal.Shaping;
using System.Security;

using SR=MS.Internal.PresentationCore.SR; 
using SRID=MS.Internal.PresentationCore.SRID;
 
// Allow suppression of presharp warnings 
#pragma warning disable 1634, 1691
 
namespace System.Windows.Media
{
    /// 
    /// The FontEmbeddingManager class handles physical and composite font embedding. 
    /// 
    public class FontEmbeddingManager 
    { 
        //-----------------------------------------------------
        // 
        //  Constructors
        //
        //-----------------------------------------------------
 
        #region Constructors
 
        ///  
        /// Creates a new instance of font usage manager.
        ///  
        public FontEmbeddingManager()
        {
            _collectedGlyphTypefaces = new Dictionary>(_uriComparer);
        } 

        #endregion Constructors 
 
        //------------------------------------------------------
        // 
        //  Public Methods
        //
        //-----------------------------------------------------
 
        #region Public Methods
 
        ///  
        /// Collects information about glyph typeface and index used by a glyph run.
        ///  
        /// Glyph run to obtain typeface and index information from.
        public void RecordUsage(GlyphRun glyphRun)
        {
            if (glyphRun == null) 
                throw new ArgumentNullException("glyphRun");
 
            // Suppress PRESharp parameter validation warning about glyphRun.GlyphTypeface because 
            // GlyphRun.GlyphTypeface property cannot be null.
#pragma warning suppress 56506 
            Uri glyphTypeface = glyphRun.GlyphTypeface.FontUri;

            Dictionary glyphSet;
 
            if (_collectedGlyphTypefaces.ContainsKey(glyphTypeface))
                glyphSet = _collectedGlyphTypefaces[glyphTypeface]; 
            else 
                glyphSet = _collectedGlyphTypefaces[glyphTypeface] = new Dictionary();
 
            foreach(ushort glyphIndex in glyphRun.GlyphIndices)
            {
                glyphSet[glyphIndex] = true;
            } 
        }
 
        ///  
        /// Returns the collection of glyph typefaces used by the previously added glyph runs.
        ///  
        /// The collection of glyph typefaces used by the previously added glyph runs.
        [CLSCompliant(false)]
        public ICollection GlyphTypefaceUris
        { 
            get
            { 
                return _collectedGlyphTypefaces.Keys; 
            }
        } 

        /// 
        /// Obtain the list of glyphs used by the glyph typeface specified by a Uri.
        ///  
        /// Specifies the Uri of a glyph typeface to obtain usage data for.
        /// A collection of glyph indices recorded previously. 
        ///  
        ///     Glyph typeface Uri does not point to a previously recorded glyph typeface.
        ///  
        [CLSCompliant(false)]
        public ICollection GetUsedGlyphs(Uri glyphTypeface)
        {
            Dictionary glyphsUsed = _collectedGlyphTypefaces[glyphTypeface]; 
            if (glyphsUsed == null)
            { 
                throw new ArgumentException(SR.Get(SRID.GlyphTypefaceNotRecorded), "glyphTypeface"); 
            }
            return glyphsUsed.Keys; 
        }

        #endregion Public Methods
 
        private class UriComparer : IEqualityComparer
        { 
            #region IEqualityComparer Members 

            public bool Equals(Uri x, Uri y) 
            {
                // We don't use Uri.Equals because it doesn't compare Fragment parts,
                // and we use Fragment part to store font face index.
                return String.Equals(x.ToString(), y.ToString(), StringComparison.OrdinalIgnoreCase); 
            }
 
            public int GetHashCode(Uri obj) 
            {
                return obj.GetHashCode(); 
            }

            #endregion
        } 

        //------------------------------------------------------ 
        // 
        //  Private Fields
        // 
        //------------------------------------------------------

        #region Private Fields
 
        /// 
        /// bool values in the dictionary don't matter, 
        /// we'll switch to Set class when it becomes available. 
        /// 
        private Dictionary>   _collectedGlyphTypefaces; 

        private static UriComparer _uriComparer = new UriComparer();

        #endregion Private Fields 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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