Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / textformatting / CharacterString.cs / 1305600 / CharacterString.cs
//------------------------------------------------------------------------ // // Microsoft Windows Client Platform // Copyright (C) Microsoft Corporation, 2003 // // File: CharacterBufferRange.cs // // Contents: A range of character buffer // // Spec: http://team/sites/Avalon/Specs/Text%20Formatting%20API.doc // // Created: 2-5-2004 Worachai Chaoweeraprasit (wchao) // //----------------------------------------------------------------------- using System; using System.Diagnostics; using System.Security; using MS.Internal; using SR = MS.Internal.PresentationCore.SR; using SRID = MS.Internal.PresentationCore.SRID; namespace System.Windows.Media.TextFormatting { ////// A string of characters /// public struct CharacterBufferRange : IEquatable{ private CharacterBufferReference _charBufferRef; private int _length; #region Constructor /// /// Construct character buffer reference from character array /// /// character array /// character buffer offset to the first character /// character length public CharacterBufferRange( char[] characterArray, int offsetToFirstChar, int characterLength ) : this( new CharacterBufferReference(characterArray, offsetToFirstChar), characterLength ) {} ////// Construct character buffer reference from string /// /// character string /// character buffer offset to the first character /// character length public CharacterBufferRange( string characterString, int offsetToFirstChar, int characterLength ) : this( new CharacterBufferReference(characterString, offsetToFirstChar), characterLength ) {} ////// Construct character buffer reference from unsafe character string /// /// pointer to character string /// character length ////// Critical: this stores a pointer to an unmanaged string of characters /// PublicOK: The caller needs unmanaged code permission in order to pass unsafe pointers to us. /// [SecurityCritical] [CLSCompliant(false)] public unsafe CharacterBufferRange( char* unsafeCharacterString, int characterLength ) : this( new CharacterBufferReference(unsafeCharacterString, characterLength), characterLength ) {} ////// Construct a character string from character buffer reference /// /// character buffer reference /// number of characters internal CharacterBufferRange( CharacterBufferReference characterBufferReference, int characterLength ) { if (characterLength < 0) { throw new ArgumentOutOfRangeException("characterLength", SR.Get(SRID.ParameterCannotBeNegative)); } int maxLength = (characterBufferReference.CharacterBuffer != null) ? characterBufferReference.CharacterBuffer.Count - characterBufferReference.OffsetToFirstChar : 0; if (characterLength > maxLength) { throw new ArgumentOutOfRangeException("characterLength", SR.Get(SRID.ParameterCannotBeGreaterThan, maxLength)); } _charBufferRef = characterBufferReference; _length = characterLength; } ////// Construct a character string from part of another character string /// internal CharacterBufferRange( CharacterBufferRange characterBufferRange, int offsetToFirstChar, int characterLength ) : this ( characterBufferRange.CharacterBuffer, characterBufferRange.OffsetToFirstChar + offsetToFirstChar, characterLength ) {} ////// Construct a character string object from string /// internal CharacterBufferRange( string charString ) : this( new StringCharacterBuffer(charString), 0, charString.Length ) {} ////// Construct character buffer from memory buffer /// internal CharacterBufferRange( CharacterBuffer charBuffer, int offsetToFirstChar, int characterLength ) : this( new CharacterBufferReference(charBuffer, offsetToFirstChar), characterLength ) {} ////// Construct a character string object by extracting text info from text run /// internal CharacterBufferRange(TextRun textRun) { _charBufferRef = textRun.CharacterBufferReference; _length = textRun.Length; } #endregion ////// Compute hash code /// public override int GetHashCode() { return _charBufferRef.GetHashCode() ^ _length; } ////// Test equality with the input object /// /// The object to test public override bool Equals(object obj) { if (obj is CharacterBufferRange) { return Equals((CharacterBufferRange)obj); } return false; } ////// Test equality with the input CharacterBufferRange /// /// The CharacterBufferRange value to test public bool Equals(CharacterBufferRange value) { return _charBufferRef.Equals(value._charBufferRef) && _length == value._length; } ////// Compare two CharacterBufferRange for equality /// /// left operand /// right operand ///whether or not two operands are equal public static bool operator == ( CharacterBufferRange left, CharacterBufferRange right ) { return left.Equals(right); } ////// Compare two CharacterBufferRange for inequality /// /// left operand /// right operand ///whether or not two operands are equal public static bool operator != ( CharacterBufferRange left, CharacterBufferRange right ) { return !(left == right); } ////// reference to the character buffer of a string /// public CharacterBufferReference CharacterBufferReference { get { return _charBufferRef; } } ////// number of characters in text source character store /// public int Length { get { return _length; } } ////// Getting an empty character string /// public static CharacterBufferRange Empty { get { return new CharacterBufferRange(); } } ////// Indicate whether the character string object contains no information /// internal bool IsEmpty { get { return _charBufferRef.CharacterBuffer == null || _length <= 0; } } ////// character memory buffer /// internal CharacterBuffer CharacterBuffer { get { return _charBufferRef.CharacterBuffer; } } ////// character offset relative to the beginning of buffer to /// the first character of the run. /// internal int OffsetToFirstChar { get { return _charBufferRef.OffsetToFirstChar; } } ////// Return a character from the range, index is relative to the beginning of the range /// internal char this[int index] { get { Invariant.Assert(index >= 0 && index < _length); return _charBufferRef.CharacterBuffer[_charBufferRef.OffsetToFirstChar + index]; } } } } // 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
- StringWriter.cs
- Environment.cs
- UInt64Storage.cs
- PerformanceCounterPermissionEntryCollection.cs
- MaskedTextBox.cs
- ToolStripItemImageRenderEventArgs.cs
- MouseGestureConverter.cs
- StringUtil.cs
- XmlSchemaImport.cs
- DoubleCollectionValueSerializer.cs
- AliasGenerator.cs
- PathSegmentCollection.cs
- PersonalizationAdministration.cs
- MappingModelBuildProvider.cs
- ConfigurationSection.cs
- DesignTimeTemplateParser.cs
- SapiRecoContext.cs
- MatrixCamera.cs
- ExpandSegment.cs
- EventEntry.cs
- Int32Collection.cs
- SchemaTableOptionalColumn.cs
- SQLByte.cs
- DataGridHyperlinkColumn.cs
- RectAnimationUsingKeyFrames.cs
- ResourceCategoryAttribute.cs
- OledbConnectionStringbuilder.cs
- DelegateOutArgument.cs
- ThreadInterruptedException.cs
- DispatcherEventArgs.cs
- EventRoute.cs
- userdatakeys.cs
- CultureTableRecord.cs
- Vector3DConverter.cs
- TargetInvocationException.cs
- SchemaMapping.cs
- LinkLabel.cs
- LineVisual.cs
- InlinedAggregationOperator.cs
- DataGridViewCellValueEventArgs.cs
- CultureSpecificCharacterBufferRange.cs
- FormsAuthentication.cs
- Int16Storage.cs
- Clock.cs
- RelationshipConverter.cs
- XPathEmptyIterator.cs
- CodeDomConfigurationHandler.cs
- QuadTree.cs
- DiffuseMaterial.cs
- DataGridViewRowHeaderCell.cs
- XPathAxisIterator.cs
- streamingZipPartStream.cs
- CreateRefExpr.cs
- HTTPNotFoundHandler.cs
- VoiceChangeEventArgs.cs
- XPathAncestorQuery.cs
- Task.cs
- VBIdentifierDesigner.xaml.cs
- TabControlCancelEvent.cs
- TabControlEvent.cs
- Pair.cs
- ObjectConverter.cs
- TransformedBitmap.cs
- AttachmentService.cs
- DataGridPagerStyle.cs
- DiagnosticStrings.cs
- CommonDialog.cs
- StructuredTypeInfo.cs
- MessageBox.cs
- ObjectSecurity.cs
- BrowserDefinition.cs
- ArgumentOutOfRangeException.cs
- EntityCodeGenerator.cs
- updatecommandorderer.cs
- SoundPlayerAction.cs
- ExpressionBuilder.cs
- ReadOnlyPropertyMetadata.cs
- RecipientInfo.cs
- ResizeGrip.cs
- RtfFormatStack.cs
- ColumnResizeAdorner.cs
- GridViewRowPresenterBase.cs
- ToolStripPanel.cs
- KeyPressEvent.cs
- SecurityTokenInclusionMode.cs
- RegistrationServices.cs
- InkCollectionBehavior.cs
- UnionCodeGroup.cs
- Operand.cs
- _TransmitFileOverlappedAsyncResult.cs
- CancellationTokenSource.cs
- RenderingBiasValidation.cs
- CommonRemoteMemoryBlock.cs
- ELinqQueryState.cs
- FormViewUpdatedEventArgs.cs
- LinkButton.cs
- KeyValuePair.cs
- XmlTextReader.cs
- OleDbTransaction.cs
- TypeElement.cs