143 lines
4.9 KiB
C#
143 lines
4.9 KiB
C#
#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Globalization;
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using System.IO;
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using System.Text;
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#if CORE || GDI
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using System.Drawing;
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using GdiFontFamily = System.Drawing.FontFamily;
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#endif
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#if WPF
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using System.Windows.Media;
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using System.Windows.Markup;
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using WpfFontFamily = System.Windows.Media.FontFamily;
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#endif
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using PdfSharp.Fonts;
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using PdfSharp.Fonts.OpenType;
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using PdfSharp.Internal;
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using PdfSharp.Pdf;
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namespace PdfSharp.Drawing
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{
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/// <summary>
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/// Global cache of all internal font family objects.
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/// </summary>
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internal sealed class FontFamilyCache
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{
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FontFamilyCache()
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{
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_familiesByName = new Dictionary<string, FontFamilyInternal>(StringComparer.OrdinalIgnoreCase);
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}
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public static FontFamilyInternal GetFamilyByName(string familyName)
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{
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try
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{
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Lock.EnterFontFactory();
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FontFamilyInternal family;
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Singleton._familiesByName.TryGetValue(familyName, out family);
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return family;
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}
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finally { Lock.ExitFontFactory(); }
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}
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/// <summary>
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/// Caches the font family or returns a previously cached one.
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/// </summary>
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public static FontFamilyInternal CacheOrGetFontFamily(FontFamilyInternal fontFamily)
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{
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try
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{
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Lock.EnterFontFactory();
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// Recall that a font family is uniquely identified by its case insensitive name.
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FontFamilyInternal existingFontFamily;
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if (Singleton._familiesByName.TryGetValue(fontFamily.Name, out existingFontFamily))
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{
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#if DEBUG_
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if (fontFamily.Name == "xxx")
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fontFamily.GetType();
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#endif
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return existingFontFamily;
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}
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Singleton._familiesByName.Add(fontFamily.Name, fontFamily);
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return fontFamily;
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}
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finally { Lock.ExitFontFactory(); }
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}
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/// <summary>
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/// Gets the singleton.
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/// </summary>
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static FontFamilyCache Singleton
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{
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get
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{
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// ReSharper disable once InvertIf
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if (_singleton == null)
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{
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try
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{
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Lock.EnterFontFactory();
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if (_singleton == null)
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_singleton = new FontFamilyCache();
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}
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finally { Lock.ExitFontFactory(); }
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}
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return _singleton;
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}
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}
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static volatile FontFamilyCache _singleton;
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internal static string GetCacheState()
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{
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StringBuilder state = new StringBuilder();
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state.Append("====================\n");
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state.Append("Font families by name\n");
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Dictionary<string, FontFamilyInternal>.KeyCollection familyKeys = Singleton._familiesByName.Keys;
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int count = familyKeys.Count;
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string[] keys = new string[count];
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familyKeys.CopyTo(keys, 0);
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Array.Sort(keys, StringComparer.OrdinalIgnoreCase);
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foreach (string key in keys)
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state.AppendFormat(" {0}: {1}\n", key, Singleton._familiesByName[key].DebuggerDisplay);
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state.Append("\n");
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return state.ToString();
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}
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/// <summary>
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/// Maps family name to internal font family.
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/// </summary>
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readonly Dictionary<string, FontFamilyInternal> _familiesByName;
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}
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}
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