Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / MS / Internal / TextFormatting / DrawingState.cs / 1 / DrawingState.cs
//------------------------------------------------------------------------ // // Microsoft Windows Client Platform // Copyright (C) Microsoft Corporation // // File: DrawingState.cs // // Contents: Drawing state of full text // // Created: 1-29-2005 Worachai Chaoweeraprasit (wchao) // //----------------------------------------------------------------------- using System; using System.Diagnostics; using System.Windows; using System.Windows.Media; namespace MS.Internal.TextFormatting { ////// Formatting state of full text /// internal sealed class DrawingState : IDisposable { private TextMetrics.FullTextLine _currentLine; // full text line currently formatted private DrawingContext _drawingContext; // current drawing context private Point _lineOrigin; // line origin XY relative to drawing context reference location private Point _vectorToLineOrigin; // vector to line origin in UV relative to paragraph start private MatrixTransform _antiInversion; // anti-inversion transform applied on drawing surface private bool _overrideBaseGuidelineY; // a flag indicating whether a new guideline overrides the line's Y guideline private double _baseGuidelineY; // the Y guideline of the text line. ////// Construct drawing state for full text /// internal DrawingState( DrawingContext drawingContext, Point lineOrigin, MatrixTransform antiInversion, TextMetrics.FullTextLine currentLine ) { _drawingContext = drawingContext; _antiInversion = antiInversion; _currentLine = currentLine; if (antiInversion == null) { _lineOrigin = lineOrigin; } else { _vectorToLineOrigin = lineOrigin; } if (_drawingContext != null) { // LineServices draws GlyphRun and TextDecorations in multiple // callbacks and GlyphRuns may have different baselines. Pushing guideline // for each DrawGlyphRun are too costly. We optimize for the common case where // GlyphRuns and TextDecorations in the TextLine share the same baseline. _baseGuidelineY = lineOrigin.Y + currentLine.Baseline; _drawingContext.PushGuidelineY1(_baseGuidelineY); } } ////// Set guideline Y for a drawing operation if necessary. It is a no-op if the Y value is the same /// as the guideline Y of the line. Otherwise, it will push the Y to override the guideline of the line. /// A SetGuidelineY() must be paired with an UnsetGuidelineY() to ensure balanced push and pop. /// internal void SetGuidelineY(double runGuidelineY) { if (_drawingContext == null) return; Invariant.Assert(!_overrideBaseGuidelineY); if (runGuidelineY != _baseGuidelineY) { // Push a new guideline to override the line's guideline _drawingContext.PushGuidelineY1(runGuidelineY); _overrideBaseGuidelineY = true; // the new Guideline Y overrides the line's guideline until next unset. } } ////// Unset guideline Y for a drawing operation if necessary. It is a no-op if the Y value is the same /// as the guideline Y of the line. Otherwise, it will push the Y to override the guideline of the line. /// A SetGuidelineY() must be paired with an UnsetGuidelineY() to ensure balanced push and pop. /// internal void UnsetGuidelineY() { if (_overrideBaseGuidelineY) { _drawingContext.Pop(); _overrideBaseGuidelineY = false; } } ////// Clean up internal state. /// public void Dispose() { // clear the guideline at line's baseline if (_drawingContext != null) { _drawingContext.Pop(); } } ////// Current drawing context /// internal DrawingContext DrawingContext { get { return _drawingContext; } } ////// Anti-inversion transform applied on drawing surface /// internal MatrixTransform AntiInversion { get { return _antiInversion; } } ////// Origin XY of the current line relative to the drawing context reference location /// internal Point LineOrigin { get { return _lineOrigin; } } ////// Vector to line origin in UV relative to paragraph start /// internal Point VectorToLineOrigin { get { return _vectorToLineOrigin; } } ////// Line currently being drawn /// internal TextMetrics.FullTextLine CurrentLine { get { return _currentLine; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------ // // Microsoft Windows Client Platform // Copyright (C) Microsoft Corporation // // File: DrawingState.cs // // Contents: Drawing state of full text // // Created: 1-29-2005 Worachai Chaoweeraprasit (wchao) // //----------------------------------------------------------------------- using System; using System.Diagnostics; using System.Windows; using System.Windows.Media; namespace MS.Internal.TextFormatting { ////// Formatting state of full text /// internal sealed class DrawingState : IDisposable { private TextMetrics.FullTextLine _currentLine; // full text line currently formatted private DrawingContext _drawingContext; // current drawing context private Point _lineOrigin; // line origin XY relative to drawing context reference location private Point _vectorToLineOrigin; // vector to line origin in UV relative to paragraph start private MatrixTransform _antiInversion; // anti-inversion transform applied on drawing surface private bool _overrideBaseGuidelineY; // a flag indicating whether a new guideline overrides the line's Y guideline private double _baseGuidelineY; // the Y guideline of the text line. ////// Construct drawing state for full text /// internal DrawingState( DrawingContext drawingContext, Point lineOrigin, MatrixTransform antiInversion, TextMetrics.FullTextLine currentLine ) { _drawingContext = drawingContext; _antiInversion = antiInversion; _currentLine = currentLine; if (antiInversion == null) { _lineOrigin = lineOrigin; } else { _vectorToLineOrigin = lineOrigin; } if (_drawingContext != null) { // LineServices draws GlyphRun and TextDecorations in multiple // callbacks and GlyphRuns may have different baselines. Pushing guideline // for each DrawGlyphRun are too costly. We optimize for the common case where // GlyphRuns and TextDecorations in the TextLine share the same baseline. _baseGuidelineY = lineOrigin.Y + currentLine.Baseline; _drawingContext.PushGuidelineY1(_baseGuidelineY); } } ////// Set guideline Y for a drawing operation if necessary. It is a no-op if the Y value is the same /// as the guideline Y of the line. Otherwise, it will push the Y to override the guideline of the line. /// A SetGuidelineY() must be paired with an UnsetGuidelineY() to ensure balanced push and pop. /// internal void SetGuidelineY(double runGuidelineY) { if (_drawingContext == null) return; Invariant.Assert(!_overrideBaseGuidelineY); if (runGuidelineY != _baseGuidelineY) { // Push a new guideline to override the line's guideline _drawingContext.PushGuidelineY1(runGuidelineY); _overrideBaseGuidelineY = true; // the new Guideline Y overrides the line's guideline until next unset. } } ////// Unset guideline Y for a drawing operation if necessary. It is a no-op if the Y value is the same /// as the guideline Y of the line. Otherwise, it will push the Y to override the guideline of the line. /// A SetGuidelineY() must be paired with an UnsetGuidelineY() to ensure balanced push and pop. /// internal void UnsetGuidelineY() { if (_overrideBaseGuidelineY) { _drawingContext.Pop(); _overrideBaseGuidelineY = false; } } ////// Clean up internal state. /// public void Dispose() { // clear the guideline at line's baseline if (_drawingContext != null) { _drawingContext.Pop(); } } ////// Current drawing context /// internal DrawingContext DrawingContext { get { return _drawingContext; } } ////// Anti-inversion transform applied on drawing surface /// internal MatrixTransform AntiInversion { get { return _antiInversion; } } ////// Origin XY of the current line relative to the drawing context reference location /// internal Point LineOrigin { get { return _lineOrigin; } } ////// Vector to line origin in UV relative to paragraph start /// internal Point VectorToLineOrigin { get { return _vectorToLineOrigin; } } ////// Line currently being drawn /// internal TextMetrics.FullTextLine CurrentLine { get { return _currentLine; } } } } // 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
- StringReader.cs
- SqlUdtInfo.cs
- GeneratedContractType.cs
- VisualStyleElement.cs
- MessageTransmitTraceRecord.cs
- NamespaceInfo.cs
- CodeArrayCreateExpression.cs
- AppDomainFactory.cs
- StrokeNodeOperations.cs
- StylusPoint.cs
- ComboBox.cs
- GenerateHelper.cs
- TemplateComponentConnector.cs
- ProfileModule.cs
- WebExceptionStatus.cs
- UIElement3DAutomationPeer.cs
- MailAddressCollection.cs
- WmpBitmapEncoder.cs
- QueryResponse.cs
- WinOEToolBoxItem.cs
- MultitargetUtil.cs
- ObservableCollectionDefaultValueFactory.cs
- ExpressionEvaluator.cs
- SourceFileBuildProvider.cs
- ConfigurationSettings.cs
- ListParagraph.cs
- Point3DAnimationUsingKeyFrames.cs
- HMACSHA512.cs
- CompilerParameters.cs
- DbProviderFactory.cs
- ExtendedPropertyCollection.cs
- EdmEntityTypeAttribute.cs
- MLangCodePageEncoding.cs
- DrawToolTipEventArgs.cs
- SocketStream.cs
- DataGridViewTopLeftHeaderCell.cs
- ActivityExecutor.cs
- AsyncPostBackErrorEventArgs.cs
- WS2007HttpBindingElement.cs
- SslStream.cs
- SystemIcmpV6Statistics.cs
- OdbcFactory.cs
- RandomNumberGenerator.cs
- SpecularMaterial.cs
- RequestQueryParser.cs
- SingleResultAttribute.cs
- ExtensionSimplifierMarkupObject.cs
- ProfileInfo.cs
- MenuEventArgs.cs
- SymbolPair.cs
- BindingContext.cs
- EnumUnknown.cs
- PlatformCulture.cs
- SqlAliaser.cs
- BindStream.cs
- ChainOfResponsibility.cs
- Divide.cs
- Opcode.cs
- ZipPackagePart.cs
- AffineTransform3D.cs
- MenuItemAutomationPeer.cs
- FixUp.cs
- HtmlCalendarAdapter.cs
- AttributeEmitter.cs
- InternalPolicyElement.cs
- CancelEventArgs.cs
- CodeVariableDeclarationStatement.cs
- backend.cs
- CatalogZone.cs
- HttpDebugHandler.cs
- Math.cs
- GridViewDeleteEventArgs.cs
- TableRowCollection.cs
- WindowsTreeView.cs
- XmlSchemaSet.cs
- EventManager.cs
- BamlLocalizabilityResolver.cs
- AttributeCollection.cs
- EnumMemberAttribute.cs
- DetailsViewUpdatedEventArgs.cs
- DesignerObjectListAdapter.cs
- PreservationFileReader.cs
- HttpStreams.cs
- DecoderNLS.cs
- SqlCacheDependencyDatabase.cs
- KnownTypeDataContractResolver.cs
- Html32TextWriter.cs
- LinkedResource.cs
- ResourceSetExpression.cs
- ResourceReader.cs
- SchemaHelper.cs
- MatrixKeyFrameCollection.cs
- CheckBoxFlatAdapter.cs
- PropertyPathWorker.cs
- State.cs
- MeshGeometry3D.cs
- DataGridTextBoxColumn.cs
- StyleCollection.cs
- PathFigureCollectionConverter.cs
- MultipartIdentifier.cs