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
- Matrix3DValueSerializer.cs
- QueueProcessor.cs
- BookmarkScopeManager.cs
- GACIdentityPermission.cs
- NullableLongSumAggregationOperator.cs
- CompilerGlobalScopeAttribute.cs
- CursorConverter.cs
- DefaultValueTypeConverter.cs
- Int32EqualityComparer.cs
- Version.cs
- CodeLinePragma.cs
- DateTimeConverter2.cs
- StrokeRenderer.cs
- InkCanvasSelectionAdorner.cs
- ObjectStateManagerMetadata.cs
- ObjectQueryExecutionPlan.cs
- DrawingContextWalker.cs
- DataRowView.cs
- WindowsListViewItemCheckBox.cs
- ManagedWndProcTracker.cs
- Calendar.cs
- FormsAuthenticationTicket.cs
- Rect.cs
- CodeThrowExceptionStatement.cs
- XmlILModule.cs
- Base64Encoder.cs
- WebPartTransformerCollection.cs
- BindingContext.cs
- XmlSchemaSimpleType.cs
- DataBindingHandlerAttribute.cs
- DeclarationUpdate.cs
- LabelLiteral.cs
- M3DUtil.cs
- PreProcessInputEventArgs.cs
- Point3DConverter.cs
- DataGridViewTextBoxColumn.cs
- EditingMode.cs
- ObjectStateEntryDbDataRecord.cs
- MenuCommand.cs
- Point.cs
- HitTestWithPointDrawingContextWalker.cs
- CryptoStream.cs
- RectangleHotSpot.cs
- SelectionChangedEventArgs.cs
- TimeStampChecker.cs
- AncillaryOps.cs
- MetadataArtifactLoaderComposite.cs
- LiteralLink.cs
- TransportSecurityHelpers.cs
- HttpClientCertificate.cs
- PaintEvent.cs
- GroupItem.cs
- Wildcard.cs
- ConfigurationSectionHelper.cs
- ValueUtilsSmi.cs
- ApplicationInterop.cs
- CqlGenerator.cs
- SchemaInfo.cs
- PropertyGridEditorPart.cs
- TransformGroup.cs
- ObjectAnimationBase.cs
- WindowPattern.cs
- ConfigurationSection.cs
- EntityDataSourceEntityTypeFilterConverter.cs
- _ChunkParse.cs
- Configuration.cs
- DiagnosticsConfigurationHandler.cs
- SubMenuStyle.cs
- TextSelection.cs
- OSFeature.cs
- OuterProxyWrapper.cs
- _ShellExpression.cs
- AuthorizationRule.cs
- XPathMultyIterator.cs
- MessageFilter.cs
- AttachedAnnotationChangedEventArgs.cs
- SQLDouble.cs
- RequestCachingSection.cs
- BindingExpressionUncommonField.cs
- HashHelper.cs
- COM2Enum.cs
- FormView.cs
- CallbackValidatorAttribute.cs
- XmlNavigatorStack.cs
- SchemaElementLookUpTable.cs
- SiteOfOriginContainer.cs
- ReflectionPermission.cs
- SerializationInfoEnumerator.cs
- ImageProxy.cs
- SerializationSectionGroup.cs
- SvcFileManager.cs
- CaseInsensitiveComparer.cs
- Serializer.cs
- SmtpSection.cs
- FileLogRecordHeader.cs
- _ShellExpression.cs
- XPathExpr.cs
- InputReport.cs
- CfgParser.cs
- GridViewDeletedEventArgs.cs