Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / 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
- EntityTypeEmitter.cs
- OperatorExpressions.cs
- WebPartManagerInternals.cs
- WebEvents.cs
- securestring.cs
- WmlCommandAdapter.cs
- ObjRef.cs
- FreeFormDesigner.cs
- ProcessModelInfo.cs
- BamlBinaryReader.cs
- HttpDebugHandler.cs
- TempFiles.cs
- SourceElementsCollection.cs
- SchemaNamespaceManager.cs
- TimeSpanHelper.cs
- EncodingNLS.cs
- MiniAssembly.cs
- WizardSideBarListControlItem.cs
- Int64Storage.cs
- BamlResourceDeserializer.cs
- DrawingGroup.cs
- IPAddressCollection.cs
- COMException.cs
- XMLSyntaxException.cs
- BaseAsyncResult.cs
- PropertyStore.cs
- XPathDocumentBuilder.cs
- SortedList.cs
- DeviceContext2.cs
- ImmutableObjectAttribute.cs
- ControlIdConverter.cs
- SafeSecurityHandles.cs
- ResourceIDHelper.cs
- MenuAdapter.cs
- ColorContext.cs
- SqlMultiplexer.cs
- UpdateExpressionVisitor.cs
- XmlSchemaGroup.cs
- BufferAllocator.cs
- DefaultCompensation.cs
- Int16AnimationUsingKeyFrames.cs
- odbcmetadatacolumnnames.cs
- CompilationUtil.cs
- Delegate.cs
- DetailsViewInsertEventArgs.cs
- DrawingAttributeSerializer.cs
- MaskedTextProvider.cs
- XmlFileEditor.cs
- OrderingQueryOperator.cs
- RotateTransform3D.cs
- TraceHandler.cs
- CharEntityEncoderFallback.cs
- TypeResolvingOptions.cs
- SqlClientFactory.cs
- Timer.cs
- TraceListener.cs
- indexingfiltermarshaler.cs
- HeaderLabel.cs
- RuleSetReference.cs
- DataGridTextBoxColumn.cs
- WindowsFormsSectionHandler.cs
- FixedSOMTextRun.cs
- WeakEventTable.cs
- Button.cs
- IdleTimeoutMonitor.cs
- BulletChrome.cs
- DefaultMemberAttribute.cs
- DataGridColumnDropSeparator.cs
- CustomErrorsSectionWrapper.cs
- ArrayExtension.cs
- PixelFormats.cs
- ResetableIterator.cs
- BindableTemplateBuilder.cs
- coordinatorfactory.cs
- Guid.cs
- SurrogateEncoder.cs
- PropertyTabChangedEvent.cs
- HijriCalendar.cs
- ComplexBindingPropertiesAttribute.cs
- DeferredElementTreeState.cs
- ImmutableDispatchRuntime.cs
- User.cs
- NetworkInterface.cs
- OdbcException.cs
- VariantWrapper.cs
- XamlReader.cs
- ToolStripSettings.cs
- ChtmlSelectionListAdapter.cs
- QilName.cs
- TypeDelegator.cs
- ToolTipService.cs
- Processor.cs
- WorkflowApplicationException.cs
- XmlDomTextWriter.cs
- WorkflowMarkupSerializerMapping.cs
- XmlAnyElementAttribute.cs
- ByteBufferPool.cs
- ReachUIElementCollectionSerializer.cs
- DatatypeImplementation.cs
- QueryOutputWriterV1.cs