Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / MS / Internal / Text / SimpleLine.cs / 1 / SimpleLine.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: SimpleLine.cs // // Description: Text line formatter. // // History: // 09/10/2003 : grzegorz - created. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Globalization; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Media.TextFormatting; namespace MS.Internal.Text { // --------------------------------------------------------------------- // Text line formatter. // --------------------------------------------------------------------- internal sealed class SimpleLine : Line { // ------------------------------------------------------------------ // // TextSource Implementation // // ----------------------------------------------------------------- #region TextSource Implementation // ------------------------------------------------------------------ // Get a text run at specified text source position. // ------------------------------------------------------------------ public override TextRun GetTextRun(int dcp) { Debug.Assert(dcp >= 0, "Character index must be non-negative."); TextRun run; // There is only one run of text. if (dcp < _content.Length) { // LineLayout may ask for dcp != 0. This case may only happen during partial // validation of TextRunCache. // Example: // 1) TextRunCache and LineMetrics array were created during measure process. // 2) Before OnRender is called somebody invalidates render only property. // This invalidates TextRunCache. // 3) Before OnRender is called InputHitTest is invoked. Because LineMetrics // array is valid, we don't have to recreate all lines. There is only // need to recreate the N-th line (line that has been hit). // During line recreation LineLayout will not refetch all runs from the // beginning of TextBlock control - it will ask for the run at the beginning // of the current line. // For this reason set 'offsetToFirstChar' to 'dcp' value. run = new TextCharacters(_content, dcp, _content.Length - dcp, _textProps); } else { run = new TextEndOfParagraph(_syntheticCharacterLength); } return run; } // ----------------------------------------------------------------- // Get text immediately before specified text source position. // ------------------------------------------------------------------ public override TextSpanGetPrecedingText(int dcp) { Debug.Assert(dcp >= 0, "Character index must be non-negative."); CharacterBufferRange charString = CharacterBufferRange.Empty; CultureInfo culture = null; if (dcp > 0) { charString = new CharacterBufferRange( _content, 0, Math.Min(dcp, _content.Length) ); culture = _textProps.CultureInfo; } return new TextSpan ( dcp, new CultureSpecificCharacterBufferRange(culture, charString) ); } /// /// TextFormatter to map a text source character index to a text effect character index /// /// text source character index ///the text effect index corresponding to the text effect character index public override int GetTextEffectCharacterIndexFromTextSourceCharacterIndex( int textSourceCharacterIndex ) { return textSourceCharacterIndex; } #endregion TextSource Implementation //------------------------------------------------------------------- // // Internal Methods // //------------------------------------------------------------------- #region Internal Methods // ----------------------------------------------------------------- // Constructor. // // owner - owner of the line. // ------------------------------------------------------------------ internal SimpleLine(System.Windows.Controls.TextBlock owner, string content, TextRunProperties textProps) : base(owner) { Debug.Assert(content != null); _content = content; _textProps = textProps; } #endregion Internal Methods //------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------- #region Private Fields // ------------------------------------------------------------------ // Content of the line. // ----------------------------------------------------------------- private readonly string _content; // ------------------------------------------------------------------ // Text properties. // ----------------------------------------------------------------- private readonly TextRunProperties _textProps; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: SimpleLine.cs // // Description: Text line formatter. // // History: // 09/10/2003 : grzegorz - created. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Globalization; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Media.TextFormatting; namespace MS.Internal.Text { // --------------------------------------------------------------------- // Text line formatter. // --------------------------------------------------------------------- internal sealed class SimpleLine : Line { // ------------------------------------------------------------------ // // TextSource Implementation // // ----------------------------------------------------------------- #region TextSource Implementation // ------------------------------------------------------------------ // Get a text run at specified text source position. // ------------------------------------------------------------------ public override TextRun GetTextRun(int dcp) { Debug.Assert(dcp >= 0, "Character index must be non-negative."); TextRun run; // There is only one run of text. if (dcp < _content.Length) { // LineLayout may ask for dcp != 0. This case may only happen during partial // validation of TextRunCache. // Example: // 1) TextRunCache and LineMetrics array were created during measure process. // 2) Before OnRender is called somebody invalidates render only property. // This invalidates TextRunCache. // 3) Before OnRender is called InputHitTest is invoked. Because LineMetrics // array is valid, we don't have to recreate all lines. There is only // need to recreate the N-th line (line that has been hit). // During line recreation LineLayout will not refetch all runs from the // beginning of TextBlock control - it will ask for the run at the beginning // of the current line. // For this reason set 'offsetToFirstChar' to 'dcp' value. run = new TextCharacters(_content, dcp, _content.Length - dcp, _textProps); } else { run = new TextEndOfParagraph(_syntheticCharacterLength); } return run; } // ----------------------------------------------------------------- // Get text immediately before specified text source position. // ------------------------------------------------------------------ public override TextSpanGetPrecedingText(int dcp) { Debug.Assert(dcp >= 0, "Character index must be non-negative."); CharacterBufferRange charString = CharacterBufferRange.Empty; CultureInfo culture = null; if (dcp > 0) { charString = new CharacterBufferRange( _content, 0, Math.Min(dcp, _content.Length) ); culture = _textProps.CultureInfo; } return new TextSpan ( dcp, new CultureSpecificCharacterBufferRange(culture, charString) ); } /// /// TextFormatter to map a text source character index to a text effect character index /// /// text source character index ///the text effect index corresponding to the text effect character index public override int GetTextEffectCharacterIndexFromTextSourceCharacterIndex( int textSourceCharacterIndex ) { return textSourceCharacterIndex; } #endregion TextSource Implementation //------------------------------------------------------------------- // // Internal Methods // //------------------------------------------------------------------- #region Internal Methods // ----------------------------------------------------------------- // Constructor. // // owner - owner of the line. // ------------------------------------------------------------------ internal SimpleLine(System.Windows.Controls.TextBlock owner, string content, TextRunProperties textProps) : base(owner) { Debug.Assert(content != null); _content = content; _textProps = textProps; } #endregion Internal Methods //------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------- #region Private Fields // ------------------------------------------------------------------ // Content of the line. // ----------------------------------------------------------------- private readonly string _content; // ------------------------------------------------------------------ // Text properties. // ----------------------------------------------------------------- private readonly TextRunProperties _textProps; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SecurityTokenResolver.cs
- PathGeometry.cs
- Wrapper.cs
- LocalTransaction.cs
- DataGridCell.cs
- Adorner.cs
- Policy.cs
- KerberosRequestorSecurityToken.cs
- TraceEventCache.cs
- ProxyHwnd.cs
- FrameworkElement.cs
- StylusCollection.cs
- RandomDelaySendsAsyncResult.cs
- MaskDesignerDialog.cs
- MimeWriter.cs
- DefaultValidator.cs
- DetailsView.cs
- Psha1DerivedKeyGenerator.cs
- NamespaceEmitter.cs
- ExceptionHandlersDesigner.cs
- ZipPackage.cs
- StrokeCollectionConverter.cs
- SystemWebSectionGroup.cs
- PaginationProgressEventArgs.cs
- AutoGeneratedFieldProperties.cs
- TcpClientSocketManager.cs
- Exceptions.cs
- TraceListeners.cs
- SymmetricAlgorithm.cs
- EntityContainerEntitySetDefiningQuery.cs
- UnaryQueryOperator.cs
- DetailsViewPageEventArgs.cs
- ExpressionParser.cs
- HttpHandlerAction.cs
- GuidelineSet.cs
- Variant.cs
- CaseCqlBlock.cs
- __ComObject.cs
- XmlSchemaSimpleTypeRestriction.cs
- UnicastIPAddressInformationCollection.cs
- HtmlControlPersistable.cs
- FastEncoderWindow.cs
- WebContext.cs
- OrthographicCamera.cs
- GlyphingCache.cs
- _BufferOffsetSize.cs
- WindowsButton.cs
- SchemaObjectWriter.cs
- DataBindingList.cs
- StrokeCollection.cs
- DictionaryMarkupSerializer.cs
- ListControlStringCollectionEditor.cs
- EventManager.cs
- ControlAdapter.cs
- Math.cs
- PropertyEmitter.cs
- ImpersonateTokenRef.cs
- BufferAllocator.cs
- MethodImplAttribute.cs
- IOException.cs
- MetaModel.cs
- PersonalizationStateQuery.cs
- ToolStrip.cs
- StrokeCollection2.cs
- SplineKeyFrames.cs
- SqlCacheDependency.cs
- StrongNameMembershipCondition.cs
- FillBehavior.cs
- RemoteWebConfigurationHostServer.cs
- ToolStripComboBox.cs
- MachineKeyConverter.cs
- ExternalException.cs
- EditBehavior.cs
- EntityProviderServices.cs
- TryExpression.cs
- FontUnit.cs
- RequestCacheValidator.cs
- ButtonBase.cs
- TabItemAutomationPeer.cs
- ScrollChrome.cs
- PropertyCondition.cs
- basenumberconverter.cs
- PageAsyncTaskManager.cs
- NativeRecognizer.cs
- ScriptManagerProxy.cs
- Drawing.cs
- basecomparevalidator.cs
- VisualTreeHelper.cs
- TreeView.cs
- AmbientLight.cs
- nulltextcontainer.cs
- DynamicValueConverter.cs
- TypeDescriptionProvider.cs
- DataGridViewSelectedRowCollection.cs
- basemetadatamappingvisitor.cs
- CompilerParameters.cs
- SingleResultAttribute.cs
- SqlMultiplexer.cs
- DispatcherHooks.cs
- NativeMethods.cs