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
- XamlWriter.cs
- CodeTypeReferenceExpression.cs
- PointLight.cs
- SpecialNameAttribute.cs
- Code.cs
- ContainerSelectorActiveEvent.cs
- ImageListImageEditor.cs
- TreeChangeInfo.cs
- WindowsTokenRoleProvider.cs
- ButtonBase.cs
- RootProfilePropertySettingsCollection.cs
- CompressedStack.cs
- Configuration.cs
- ServiceHostingEnvironment.cs
- Assert.cs
- CharConverter.cs
- RoleGroup.cs
- SortedSet.cs
- Asn1IntegerConverter.cs
- WindowsListViewGroupHelper.cs
- FaultHandlingFilter.cs
- Errors.cs
- ContainerUtilities.cs
- MenuEventArgs.cs
- MinimizableAttributeTypeConverter.cs
- RectValueSerializer.cs
- SizeConverter.cs
- HMACMD5.cs
- AxisAngleRotation3D.cs
- DataTableMapping.cs
- DropDownButton.cs
- Win32MouseDevice.cs
- CheckedListBox.cs
- RoleExceptions.cs
- DesignerProperties.cs
- Int16Storage.cs
- ConfigurationPermission.cs
- SQLSingleStorage.cs
- ButtonBase.cs
- UnsafeNativeMethods.cs
- MarkupObject.cs
- WebAdminConfigurationHelper.cs
- ArithmeticException.cs
- SignatureResourcePool.cs
- Trace.cs
- AssemblyBuilder.cs
- NumberFormatInfo.cs
- CompiledQuery.cs
- LZCodec.cs
- FlowDocumentPageViewerAutomationPeer.cs
- storepermission.cs
- TextRangeEditTables.cs
- ResolveMatchesApril2005.cs
- OraclePermissionAttribute.cs
- DataGridViewLinkCell.cs
- SafeArrayTypeMismatchException.cs
- VisualTreeHelper.cs
- ExtensionCollection.cs
- Oid.cs
- DataSourceHelper.cs
- COM2DataTypeToManagedDataTypeConverter.cs
- KerberosSecurityTokenProvider.cs
- SqlFacetAttribute.cs
- MailMessageEventArgs.cs
- EnumConverter.cs
- PackageFilter.cs
- PropertyRecord.cs
- SqlUtils.cs
- handlecollector.cs
- FormParameter.cs
- PropertyGridEditorPart.cs
- CorrelationManager.cs
- Int32Converter.cs
- ModelTreeEnumerator.cs
- CallbackException.cs
- FixedBufferAttribute.cs
- ListViewPagedDataSource.cs
- TraceXPathNavigator.cs
- QueryConverter.cs
- ReliabilityContractAttribute.cs
- Stylesheet.cs
- SqlConnectionString.cs
- ParagraphVisual.cs
- PersistenceException.cs
- SchemaImporterExtensionsSection.cs
- DesignerLinkAdapter.cs
- DriveNotFoundException.cs
- ReliabilityContractAttribute.cs
- COM2ComponentEditor.cs
- X509UI.cs
- TemplateBindingExtension.cs
- StyleTypedPropertyAttribute.cs
- FormattedTextSymbols.cs
- DataGridViewRowsRemovedEventArgs.cs
- PerformanceCounterPermissionAttribute.cs
- EncodingNLS.cs
- Interlocked.cs
- AxHostDesigner.cs
- SqlBulkCopy.cs
- RelationshipSet.cs