Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / MS / Internal / Text / TextLineResult.cs / 1 / TextLineResult.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: Access to calculated information of a line of text created // by TextBlock. // // History: // 04/25/2003 : grzegorz - Moving from Avalon branch. // 06/25/2004 : grzegorz - Performance work. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Media; using MS.Internal.Documents; namespace MS.Internal.Text { ////// Provides access to calculated information of a line of text created /// by TextBlock. /// internal sealed class TextLineResult : LineResult { //------------------------------------------------------------------- // // LineResult Methods // //------------------------------------------------------------------- #region LineResult Methods ////// Retrieves a position matching distance within the line. /// /// Distance within the line. ////// A text position and its orientation matching or closest to the distance. /// internal override ITextPointer GetTextPositionFromDistance(double distance) { return _owner.GetTextPositionFromDistance(_dcp, distance, _layoutBox.Top, _index); } ////// /// /// ///internal override bool IsAtCaretUnitBoundary(ITextPointer position) { Debug.Assert(false); return false; } /// /// /// /// /// ///internal override ITextPointer GetNextCaretUnitPosition(ITextPointer position, LogicalDirection direction) { Debug.Assert(false); return null; } /// /// /// /// ///internal override ITextPointer GetBackspaceCaretUnitPosition(ITextPointer position) { Debug.Assert(false); return null; } /// /// /// /// /// ///internal override ReadOnlyCollection GetGlyphRuns(ITextPointer start, ITextPointer end) { Debug.Assert(false); return null; } /// /// Retrieves the position after last content character of the line, /// not including any line breaks. /// ////// The position after last content character of the line, /// not including any line breaks. /// internal override ITextPointer GetContentEndPosition() { EnsureComplexData(); return _owner.TextContainer.CreatePointerAtOffset(_dcp + _cchContent, LogicalDirection.Backward); } ////// Retrieves the position in the line pointing to the beginning of content /// hidden by ellipses. /// ////// The position in the line pointing to the beginning of content /// hidden by ellipses. /// internal override ITextPointer GetEllipsesPosition() { EnsureComplexData(); if (_cchEllipses != 0) { return _owner.TextContainer.CreatePointerAtOffset(_dcp + _cch - _cchEllipses, LogicalDirection.Forward); } return null; } ////// Retrieves the position after last content character of the line, /// not including any line breaks. /// ////// The position after last content character of the line, /// not including any line breaks. /// internal override int GetContentEndPositionCP() { EnsureComplexData(); return _dcp + _cchContent; } ////// Retrieves the position in the line pointing to the beginning of content /// hidden by ellipses. /// ////// The position in the line pointing to the beginning of content /// hidden by ellipses. /// internal override int GetEllipsesPositionCP() { EnsureComplexData(); return _dcp + _cch - _cchEllipses; } #endregion LineResult Methods //-------------------------------------------------------------------- // // LineResult Properties // //------------------------------------------------------------------- #region LineResult Properties ////// ITextPointer representing the beginning of the Line's contents. /// internal override ITextPointer StartPosition { get { if (_startPosition == null) { _startPosition = _owner.TextContainer.CreatePointerAtOffset(_dcp, LogicalDirection.Forward); } return _startPosition; } } ////// ITextPointer representing the end of the Line's contents. /// internal override ITextPointer EndPosition { get { if (_endPosition == null) { _endPosition = _owner.TextContainer.CreatePointerAtOffset(_dcp + _cch, LogicalDirection.Backward); } return _endPosition; } } ////// Character position representing the beginning of the Line's contents. /// internal override int StartPositionCP { get { return _dcp; } } ////// Character position representing the end of the Line's contents. /// internal override int EndPositionCP { get { return _dcp + _cch; } } ////// The bounding rectangle of the line. /// internal override Rect LayoutBox { get { return _layoutBox; } } ////// The dominant baseline of the line. /// Distance from the top of the line to the baseline. /// internal override double Baseline { get { return _baseline; } } #endregion LineResult Properties //-------------------------------------------------------------------- // // Constructors // //-------------------------------------------------------------------- #region Constructors ////// Constructor. /// /// Owner of the line. /// Index of the first character in the line. /// Number of all characters in the line. /// Rectangle of the line within a text paragraph. /// Distance from the top of the line to the baseline. /// Index of the line within the text block internal TextLineResult(System.Windows.Controls.TextBlock owner, int dcp, int cch, Rect layoutBox, double baseline, int index) { _owner = owner; _dcp = dcp; _cch = cch; _layoutBox = layoutBox; _baseline = baseline; _index = index; _cchContent = _cchEllipses = -1; } #endregion Constructors //------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------- #region Private Methods private void EnsureComplexData() { if (_cchContent == -1) { _owner.GetLineDetails(_dcp, _index, _layoutBox.Top, out _cchContent, out _cchEllipses); } } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //------------------------------------------------------------------- #region Private Fields ////// Owner of the line. /// private readonly System.Windows.Controls.TextBlock _owner; ////// Index of the first character in the line. /// private readonly int _dcp; ////// Number of all characters in the line. /// private readonly int _cch; ////// Rectangle of the line within a text paragraph. /// private readonly Rect _layoutBox; ////// Index of the line within the TextBlock /// private int _index; ////// The dominant baseline of the line. Distance from the top of the /// line to the baseline. /// private readonly double _baseline; ////// ITextPointer representing the beginning of the Line's contents. /// private ITextPointer _startPosition; ////// ITextPointer representing the end of the Line's contents. /// private ITextPointer _endPosition; ////// Number of characters of content of the line, not including any line breaks. /// private int _cchContent; ////// Number of characters hidden by ellipses. /// private int _cchEllipses; #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. // // // Description: Access to calculated information of a line of text created // by TextBlock. // // History: // 04/25/2003 : grzegorz - Moving from Avalon branch. // 06/25/2004 : grzegorz - Performance work. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Media; using MS.Internal.Documents; namespace MS.Internal.Text { ////// Provides access to calculated information of a line of text created /// by TextBlock. /// internal sealed class TextLineResult : LineResult { //------------------------------------------------------------------- // // LineResult Methods // //------------------------------------------------------------------- #region LineResult Methods ////// Retrieves a position matching distance within the line. /// /// Distance within the line. ////// A text position and its orientation matching or closest to the distance. /// internal override ITextPointer GetTextPositionFromDistance(double distance) { return _owner.GetTextPositionFromDistance(_dcp, distance, _layoutBox.Top, _index); } ////// /// /// ///internal override bool IsAtCaretUnitBoundary(ITextPointer position) { Debug.Assert(false); return false; } /// /// /// /// /// ///internal override ITextPointer GetNextCaretUnitPosition(ITextPointer position, LogicalDirection direction) { Debug.Assert(false); return null; } /// /// /// /// ///internal override ITextPointer GetBackspaceCaretUnitPosition(ITextPointer position) { Debug.Assert(false); return null; } /// /// /// /// /// ///internal override ReadOnlyCollection GetGlyphRuns(ITextPointer start, ITextPointer end) { Debug.Assert(false); return null; } /// /// Retrieves the position after last content character of the line, /// not including any line breaks. /// ////// The position after last content character of the line, /// not including any line breaks. /// internal override ITextPointer GetContentEndPosition() { EnsureComplexData(); return _owner.TextContainer.CreatePointerAtOffset(_dcp + _cchContent, LogicalDirection.Backward); } ////// Retrieves the position in the line pointing to the beginning of content /// hidden by ellipses. /// ////// The position in the line pointing to the beginning of content /// hidden by ellipses. /// internal override ITextPointer GetEllipsesPosition() { EnsureComplexData(); if (_cchEllipses != 0) { return _owner.TextContainer.CreatePointerAtOffset(_dcp + _cch - _cchEllipses, LogicalDirection.Forward); } return null; } ////// Retrieves the position after last content character of the line, /// not including any line breaks. /// ////// The position after last content character of the line, /// not including any line breaks. /// internal override int GetContentEndPositionCP() { EnsureComplexData(); return _dcp + _cchContent; } ////// Retrieves the position in the line pointing to the beginning of content /// hidden by ellipses. /// ////// The position in the line pointing to the beginning of content /// hidden by ellipses. /// internal override int GetEllipsesPositionCP() { EnsureComplexData(); return _dcp + _cch - _cchEllipses; } #endregion LineResult Methods //-------------------------------------------------------------------- // // LineResult Properties // //------------------------------------------------------------------- #region LineResult Properties ////// ITextPointer representing the beginning of the Line's contents. /// internal override ITextPointer StartPosition { get { if (_startPosition == null) { _startPosition = _owner.TextContainer.CreatePointerAtOffset(_dcp, LogicalDirection.Forward); } return _startPosition; } } ////// ITextPointer representing the end of the Line's contents. /// internal override ITextPointer EndPosition { get { if (_endPosition == null) { _endPosition = _owner.TextContainer.CreatePointerAtOffset(_dcp + _cch, LogicalDirection.Backward); } return _endPosition; } } ////// Character position representing the beginning of the Line's contents. /// internal override int StartPositionCP { get { return _dcp; } } ////// Character position representing the end of the Line's contents. /// internal override int EndPositionCP { get { return _dcp + _cch; } } ////// The bounding rectangle of the line. /// internal override Rect LayoutBox { get { return _layoutBox; } } ////// The dominant baseline of the line. /// Distance from the top of the line to the baseline. /// internal override double Baseline { get { return _baseline; } } #endregion LineResult Properties //-------------------------------------------------------------------- // // Constructors // //-------------------------------------------------------------------- #region Constructors ////// Constructor. /// /// Owner of the line. /// Index of the first character in the line. /// Number of all characters in the line. /// Rectangle of the line within a text paragraph. /// Distance from the top of the line to the baseline. /// Index of the line within the text block internal TextLineResult(System.Windows.Controls.TextBlock owner, int dcp, int cch, Rect layoutBox, double baseline, int index) { _owner = owner; _dcp = dcp; _cch = cch; _layoutBox = layoutBox; _baseline = baseline; _index = index; _cchContent = _cchEllipses = -1; } #endregion Constructors //------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------- #region Private Methods private void EnsureComplexData() { if (_cchContent == -1) { _owner.GetLineDetails(_dcp, _index, _layoutBox.Top, out _cchContent, out _cchEllipses); } } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //------------------------------------------------------------------- #region Private Fields ////// Owner of the line. /// private readonly System.Windows.Controls.TextBlock _owner; ////// Index of the first character in the line. /// private readonly int _dcp; ////// Number of all characters in the line. /// private readonly int _cch; ////// Rectangle of the line within a text paragraph. /// private readonly Rect _layoutBox; ////// Index of the line within the TextBlock /// private int _index; ////// The dominant baseline of the line. Distance from the top of the /// line to the baseline. /// private readonly double _baseline; ////// ITextPointer representing the beginning of the Line's contents. /// private ITextPointer _startPosition; ////// ITextPointer representing the end of the Line's contents. /// private ITextPointer _endPosition; ////// Number of characters of content of the line, not including any line breaks. /// private int _cchContent; ////// Number of characters hidden by ellipses. /// private int _cchEllipses; #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
- EventLogEntryCollection.cs
- DataRelation.cs
- LassoSelectionBehavior.cs
- ServiceModelSecurityTokenTypes.cs
- TableLayoutRowStyleCollection.cs
- XsltConvert.cs
- AssemblyBuilder.cs
- FacetValues.cs
- SQLByte.cs
- SafeArrayTypeMismatchException.cs
- ClipboardProcessor.cs
- DelayedRegex.cs
- ProviderIncompatibleException.cs
- Hash.cs
- ProfilePropertySettingsCollection.cs
- SemanticBasicElement.cs
- SignatureGenerator.cs
- XamlVector3DCollectionSerializer.cs
- ParentControlDesigner.cs
- AssemblyHash.cs
- ScrollViewerAutomationPeer.cs
- SharedUtils.cs
- WindowsStatic.cs
- AtomMaterializerLog.cs
- PcmConverter.cs
- CookieHandler.cs
- PointCollection.cs
- ContainsRowNumberChecker.cs
- ThumbAutomationPeer.cs
- XmlArrayItemAttribute.cs
- SelectQueryOperator.cs
- InfoCardServiceInstallComponent.cs
- UrlMapping.cs
- localization.cs
- FastPropertyAccessor.cs
- RoutedPropertyChangedEventArgs.cs
- PlanCompilerUtil.cs
- BasicBrowserDialog.designer.cs
- MultipleViewPatternIdentifiers.cs
- PointConverter.cs
- EncodingDataItem.cs
- TextPenaltyModule.cs
- XmlSchemaType.cs
- GradientStop.cs
- TextElementCollectionHelper.cs
- CapabilitiesState.cs
- MobileErrorInfo.cs
- ElementAction.cs
- SqlExpressionNullability.cs
- PersonalizationProvider.cs
- SequentialWorkflowRootDesigner.cs
- ProfileInfo.cs
- PositiveTimeSpanValidator.cs
- HitTestWithGeometryDrawingContextWalker.cs
- XmlDataFileEditor.cs
- _KerberosClient.cs
- ToolboxComponentsCreatedEventArgs.cs
- AllMembershipCondition.cs
- MappingItemCollection.cs
- GeneralTransform3D.cs
- ScriptingScriptResourceHandlerSection.cs
- MouseGestureConverter.cs
- MailHeaderInfo.cs
- EntryIndex.cs
- TrustManager.cs
- DataBoundControlAdapter.cs
- WebPartConnectionsCancelEventArgs.cs
- DBDataPermission.cs
- TypedTableHandler.cs
- DoubleConverter.cs
- MostlySingletonList.cs
- ExtenderProvidedPropertyAttribute.cs
- IImplicitResourceProvider.cs
- ElapsedEventArgs.cs
- FileDialog.cs
- StringStorage.cs
- CommentAction.cs
- TextEffectCollection.cs
- Menu.cs
- SystemBrushes.cs
- TaiwanCalendar.cs
- PrincipalPermission.cs
- SystemInfo.cs
- DbTypeMap.cs
- DbConnectionStringCommon.cs
- WebEvents.cs
- DataRowView.cs
- TreePrinter.cs
- RelatedView.cs
- StaticSiteMapProvider.cs
- Highlights.cs
- XmlSchemaObjectTable.cs
- TimeSpanSecondsConverter.cs
- BindingBase.cs
- PointUtil.cs
- ItemsPanelTemplate.cs
- ReflectionTypeLoadException.cs
- PublisherMembershipCondition.cs
- SQLBinary.cs
- TextTreeExtractElementUndoUnit.cs