Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Text / SimpleLine.cs / 1305600 / SimpleLine.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: SimpleLine.cs // // Description: Text line formatter. // // History: // 09/10/2003 : [....] - 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
- AutoGeneratedFieldProperties.cs
- PerfCounterSection.cs
- Interlocked.cs
- FeatureSupport.cs
- ToolStripItemDataObject.cs
- _Connection.cs
- SerializationEventsCache.cs
- ChangeProcessor.cs
- WebPartCatalogAddVerb.cs
- SqlHelper.cs
- MSAANativeProvider.cs
- Point3D.cs
- Stack.cs
- CompatibleComparer.cs
- PolicyException.cs
- PenCursorManager.cs
- CompiledELinqQueryState.cs
- DataGridViewSelectedRowCollection.cs
- DateTimeUtil.cs
- StaticFileHandler.cs
- DetailsViewModeEventArgs.cs
- AsyncContentLoadedEventArgs.cs
- COAUTHINFO.cs
- MetadataCollection.cs
- ListItemCollection.cs
- UserNameSecurityToken.cs
- PrintDialog.cs
- DynamicObjectAccessor.cs
- HttpValueCollection.cs
- DecoderNLS.cs
- WeakReference.cs
- ComponentResourceKeyConverter.cs
- RemoteWebConfigurationHostServer.cs
- StrongNameHelpers.cs
- WebPartCatalogCloseVerb.cs
- BitmapImage.cs
- BitStream.cs
- SocketManager.cs
- BitmapEditor.cs
- FormattedTextSymbols.cs
- DataControlImageButton.cs
- DataGridViewColumnHeaderCell.cs
- DbProviderFactory.cs
- QuotedPrintableStream.cs
- Rect.cs
- PtsHelper.cs
- ObjectViewQueryResultData.cs
- Regex.cs
- ToolStripDropDownItemDesigner.cs
- WmpBitmapEncoder.cs
- TextProviderWrapper.cs
- WebProxyScriptElement.cs
- MatrixAnimationBase.cs
- XmlAtomErrorReader.cs
- IsolatedStorageException.cs
- DbMetaDataFactory.cs
- DesignTimeVisibleAttribute.cs
- Evidence.cs
- LogicalExpr.cs
- SiteMapNodeItemEventArgs.cs
- TextBox.cs
- RewritingValidator.cs
- PtsHelper.cs
- XmlArrayAttribute.cs
- WebPartTransformerCollection.cs
- Set.cs
- SoapIgnoreAttribute.cs
- ConfigurationLockCollection.cs
- SQLDateTimeStorage.cs
- ImageMap.cs
- IItemProperties.cs
- MetadataPropertyCollection.cs
- OptimalBreakSession.cs
- StrokeIntersection.cs
- SubMenuStyle.cs
- Utility.cs
- BulletedListDesigner.cs
- ControlBuilder.cs
- LinearGradientBrush.cs
- Compiler.cs
- AsymmetricSignatureDeformatter.cs
- Stroke2.cs
- BinaryUtilClasses.cs
- WindowsListBox.cs
- _IPv4Address.cs
- BitmapEffectCollection.cs
- PropertyConverter.cs
- ResourcePool.cs
- AttributedMetaModel.cs
- QueueProcessor.cs
- DesignParameter.cs
- XsltException.cs
- XmlCDATASection.cs
- TextCollapsingProperties.cs
- Binding.cs
- CreateUserErrorEventArgs.cs
- RemotingServices.cs
- FileSystemEventArgs.cs
- RequiredFieldValidator.cs
- SafeNativeMethods.cs