Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / PtsHost / OptimalBreakSession.cs / 1305600 / OptimalBreakSession.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: OptimalBreakSession // // Description: OptimalBreakSession is unmanaged resouce handle to TextParagraphCache // // History: // 06/07/2005 : ghermann - created // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Windows; using System.Security; // SecurityCritical using System.Windows.Documents; using MS.Internal.Text; using MS.Internal.PtsHost.UnsafeNativeMethods; using System.Windows.Media.TextFormatting; namespace MS.Internal.PtsHost { // --------------------------------------------------------------------- // Break record for line - holds decoration information // --------------------------------------------------------------------- internal sealed class OptimalBreakSession : UnmanagedHandle { // ------------------------------------------------------------------ // Constructor. // // PtsContext - Context // TextParagraphCache - Contained line break // ----------------------------------------------------------------- internal OptimalBreakSession(TextParagraph textParagraph, TextParaClient textParaClient, TextParagraphCache TextParagraphCache, OptimalTextSource optimalTextSource) : base(textParagraph.PtsContext) { _textParagraph = textParagraph; _textParaClient = textParaClient; _textParagraphCache = TextParagraphCache; _optimalTextSource = optimalTextSource; } ////// Dispose the break session / paragraph cache /// public override void Dispose() { try { if(_textParagraphCache != null) { _textParagraphCache.Dispose(); } if(_optimalTextSource != null) { _optimalTextSource.Dispose(); } } finally { _textParagraphCache = null; _optimalTextSource = null; } base.Dispose(); } #region Internal Properties internal TextParagraphCache TextParagraphCache { get { return _textParagraphCache; } } internal TextParagraph TextParagraph { get { return _textParagraph; } } internal TextParaClient TextParaClient { get { return _textParaClient; } } internal OptimalTextSource OptimalTextSource { get { return _optimalTextSource; } } #endregion Internal Properties #region Private Fields private TextParagraphCache _textParagraphCache; private TextParagraph _textParagraph; private TextParaClient _textParaClient; private OptimalTextSource _optimalTextSource; #endregion Private Fields } // ---------------------------------------------------------------------- // LineBreakpoint - Unmanaged handle for TextBreakpoint / optimal break session // ---------------------------------------------------------------------- internal sealed class LineBreakpoint : UnmanagedHandle { // ----------------------------------------------------------------- // Constructor. // // PtsContext - Context // TextBreakpoint - Contained breakpoint // ------------------------------------------------------------------ internal LineBreakpoint(OptimalBreakSession optimalBreakSession, TextBreakpoint textBreakpoint) : base(optimalBreakSession.PtsContext) { _textBreakpoint = textBreakpoint; _optimalBreakSession = optimalBreakSession; } ////// Dispose the text breakpoint /// public override void Dispose() { if(_textBreakpoint != null) { _textBreakpoint.Dispose(); } base.Dispose(); } #region Internal Properties internal OptimalBreakSession OptimalBreakSession { get { return _optimalBreakSession; } } #endregion Internal Properties #region Private Fields private TextBreakpoint _textBreakpoint; private OptimalBreakSession _optimalBreakSession; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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