Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Documents / DocumentReference.cs / 2 / DocumentReference.cs
//---------------------------------------------------------------------------- //// Copyright (C) 2004 by Microsoft Corporation. All rights reserved. // // // Description: // Implements the DocumentReference element // // History: // 05/13/2004 - [....] ([....]) - Created. // // //--------------------------------------------------------------------------- namespace System.Windows.Documents { using MS.Internal; using MS.Internal.AppModel; using MS.Internal.Documents; using MS.Internal.Utility; using MS.Internal.Navigation; using MS.Internal.PresentationFramework; // SecurityHelper using System.Reflection; using System.Windows; // DependencyID etc. using System.Windows.Navigation; using System.Windows.Markup; using System.Windows.Threading; // Dispatcher using System; using System.ComponentModel; using System.Diagnostics; using System.IO; using System.IO.Packaging; using System.Net; using System.Security; //===================================================================== ////// DocumentReference is the class that references a Document. /// Each document /// public sealed class DocumentReference : FrameworkElement, IUriContext { //------------------------------------------------------------------- // // Connstructors // //---------------------------------------------------------------------- #region Constructors ////// Default DocumentReference constructor /// ////// Automatic determination of current Dispatcher. Use alternative constructor /// that accepts a Dispatcher for best performance. /// public DocumentReference() : base() { _Init(); } #endregion Constructors //------------------------------------------------------------------- // // Public Methods // //---------------------------------------------------------------------- #region Public Methods ////// Synchonrously download and parse the document based on the Source specification. /// If a document was attached earlier and forceReload == false, the attached /// document will be returned. forceReload == true results in downloading of the referenced /// document based on Source specification, any previously attached document is ignored /// in this case. /// Regardless of forceReload, the document will be loaded based on Source specification if /// it hasn't been loaded earlier. /// /// Force reloading the document instead of using cached value ///The document tree public FixedDocument GetDocument(bool forceReload) { DocumentsTrace.FixedDocumentSequence.IDF.Trace(string.Format("DocumentReference.GetDocument ({0}, {1})", Source == null ? new Uri("", UriKind.RelativeOrAbsolute) : Source, forceReload)); VerifyAccess(); FixedDocument idp = null; if (_doc != null) { idp = _doc; } else { if (!forceReload) { idp = CurrentlyLoadedDoc; } if (idp == null) { FixedDocument idpReloaded = _LoadDocument(); if (idpReloaded != null) { DocumentsTrace.FixedDocumentSequence.IDF.Trace(string.Format("DocumentReference.GetDocument Loaded IDP {0}", idpReloaded.GetHashCode())); // save the doc's identity _docIdentity = idpReloaded; idp = idpReloaded; } } } if (idp != null) { LogicalTreeHelper.AddLogicalChild(this.Parent, idp); } return idp; } ////// Attach a document to this DocumentReference /// You can only attach a document if it is not attached before or it is not created from URI before. /// /// public void SetDocument(FixedDocument doc) { VerifyAccess(); _docIdentity = null; _doc = doc; } #endregion Public Methods //-------------------------------------------------------------------- // // Public Properties // //--------------------------------------------------------------------- #region Public Properties ////// Dynamic Property to reference an external document stream. /// public static readonly DependencyProperty SourceProperty = DependencyProperty.Register( "Source", typeof(Uri), typeof(DocumentReference), new FrameworkPropertyMetadata( (Uri) null, new PropertyChangedCallback(OnSourceChanged))); static void OnSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { DocumentsTrace.FixedDocumentSequence.IDF.Trace(string.Format("DocumentReference.Source_Invaidated")); DocumentReference docRef = (DocumentReference)d; if (!object.Equals(e.OldValue, e.NewValue)) { Uri oldSource = (Uri) e.OldValue; Uri newSource = (Uri) e.NewValue; DocumentsTrace.FixedDocumentSequence.IDF.Trace(string.Format("====Nuke old doc {0} with new {1}", oldSource == null ? "null" : oldSource.ToString(), newSource == null? "null" : newSource.ToString())); // drop loaded document if source changed docRef._doc = null; // // #966803: Source change won't be a support scenario. // } } ////// Get/Set Source property that references an external page stream. /// public Uri Source { get { return (Uri) GetValue(SourceProperty); } set { SetValue(SourceProperty, value); } } #endregion Public Properties #region IUriContext ////// Uri IUriContext.BaseUri { get { return (Uri)GetValue(BaseUriHelper.BaseUriProperty); } set { SetValue(BaseUriHelper.BaseUriProperty, value); } } #endregion IUriContext //-------------------------------------------------------------------- // // Public Events // //--------------------------------------------------------------------- #region Public Event #endregion Public Event //------------------------------------------------------------------- // // Internal Methods // //--------------------------------------------------------------------- #region Internal Methods #if DEBUG internal void Dump() { DocumentsTrace.FixedDocumentSequence.Content.Trace(string.Format(" This {0}", this.GetHashCode())); DocumentsTrace.FixedDocumentSequence.Content.Trace(string.Format(" Source {0}", this.Source == null ? "null" : this.Source.ToString())); DocumentsTrace.FixedDocumentSequence.Content.Trace(string.Format(" _doc {0}", _doc == null ? 0 : _doc.GetHashCode())); DocumentsTrace.FixedDocumentSequence.Content.Trace(string.Format(" _docIdentity {0}", _docIdentity == null ? 0 : _docIdentity.GetHashCode())); } #endif #endregion Internal Methods //-------------------------------------------------------------------- // // Internal Properties // //--------------------------------------------------------------------- #region Internal Properties // return most recent result of GetDocument, if it is still alive internal FixedDocument CurrentlyLoadedDoc { get { return _docIdentity; } } #endregion Internal Properties //-------------------------------------------------------------------- // // private Properties // //---------------------------------------------------------------------- #region Private Properties #endregion Private Properties //------------------------------------------------------------------- // // Private Methods // //---------------------------------------------------------------------- #region Private Methods private void _Init() { this.InheritanceBehavior = InheritanceBehavior.SkipToAppNow; } ////// /// Critical as it access the base uri through GetUriToNavigate /// [SecurityCritical] private Uri _ResolveUri() { Uri uriToNavigate = this.Source; if (uriToNavigate != null) { uriToNavigate = BindUriHelper.GetUriToNavigate(this, ((IUriContext)this).BaseUri, uriToNavigate); } return uriToNavigate; } // sync load a document ////// Critical as it access the base uri through _resolveUri /// TreatAsSafe since it does not disclose this /// [SecurityCritical, SecurityTreatAsSafe] private FixedDocument _LoadDocument() { FixedDocument idp = null; Uri uriToLoad = _ResolveUri(); if (uriToLoad != null) { ContentType mimeType = null; Stream docStream = null; docStream = WpfWebRequestHelper.CreateRequestAndGetResponseStream(uriToLoad, out mimeType); if (docStream == null) { throw new ApplicationException(SR.Get(SRID.DocumentReferenceNotFound)); } ParserContext pc = new ParserContext(); pc.BaseUri = uriToLoad; if (BindUriHelper.IsXamlMimeType(mimeType)) { XpsValidatingLoader loader = new XpsValidatingLoader(); idp = loader.Load(docStream, ((IUriContext)this).BaseUri, pc, mimeType) as FixedDocument; } else if (MS.Internal.MimeTypeMapper.BamlMime.AreTypeAndSubTypeEqual(mimeType)) { idp = XamlReader.LoadBaml(docStream, pc, null, true) as FixedDocument; } else { throw new ApplicationException(SR.Get(SRID.DocumentReferenceUnsupportedMimeType)); } idp.DocumentReference = this; } return idp; } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //--------------------------------------------------------------------- #region Private Fields private FixedDocument _doc; private FixedDocument _docIdentity; // used to cache the identity of the IDF so the IDF knows where it come from. #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
- OletxCommittableTransaction.cs
- DbReferenceCollection.cs
- HostingEnvironment.cs
- ListViewAutomationPeer.cs
- DefaultEventAttribute.cs
- ItemContainerGenerator.cs
- EventRecord.cs
- RequestCache.cs
- WebConfigurationManager.cs
- HttpListenerElement.cs
- FilteredDataSetHelper.cs
- WindowsListViewSubItem.cs
- AuthenticationManager.cs
- CompositeClientFormatter.cs
- StrongTypingException.cs
- InvalidCommandTreeException.cs
- GridViewAutoFormat.cs
- PerformanceCounterPermissionAttribute.cs
- TypeUnloadedException.cs
- RelationshipSet.cs
- ContentOperations.cs
- OletxResourceManager.cs
- ReadOnlyCollectionBuilder.cs
- Quad.cs
- ComPlusServiceLoader.cs
- DispatchWrapper.cs
- ByteArrayHelperWithString.cs
- DbConnectionFactory.cs
- ZipIOExtraFieldElement.cs
- XamlContextStack.cs
- GlyphingCache.cs
- NonBatchDirectoryCompiler.cs
- ConfigurationSectionGroupCollection.cs
- ProcessThread.cs
- Environment.cs
- AppliedDeviceFiltersDialog.cs
- _NativeSSPI.cs
- ReferenceConverter.cs
- RenderDataDrawingContext.cs
- DrawingState.cs
- MailBnfHelper.cs
- PathFigure.cs
- CompilerGeneratedAttribute.cs
- streamingZipPartStream.cs
- BeginGetFileNameFromUserRequest.cs
- ObjectAssociationEndMapping.cs
- WsatStrings.cs
- ChildrenQuery.cs
- ChannelDispatcherCollection.cs
- PositiveTimeSpanValidatorAttribute.cs
- WebPartTransformerCollection.cs
- Types.cs
- PageContentCollection.cs
- BitmapEffectDrawing.cs
- querybuilder.cs
- CmsInterop.cs
- UIEndRequest.cs
- ItemMap.cs
- StylusPointPropertyInfoDefaults.cs
- TagMapInfo.cs
- MetabaseServerConfig.cs
- TextEditorDragDrop.cs
- InputMethodStateChangeEventArgs.cs
- TaskFactory.cs
- FileDialogCustomPlace.cs
- SecureStringHasher.cs
- ListViewGroupConverter.cs
- CodeObjectCreateExpression.cs
- ISAPIWorkerRequest.cs
- Stopwatch.cs
- CommandHelpers.cs
- Registry.cs
- CallSiteBinder.cs
- _ShellExpression.cs
- Condition.cs
- ElasticEase.cs
- SHA256Managed.cs
- TraceHandler.cs
- SparseMemoryStream.cs
- httpstaticobjectscollection.cs
- PropVariant.cs
- RowSpanVector.cs
- PersianCalendar.cs
- SHA512Managed.cs
- LineGeometry.cs
- FontFaceLayoutInfo.cs
- Configuration.cs
- PenThread.cs
- SystemMulticastIPAddressInformation.cs
- ExecutionEngineException.cs
- InputBinder.cs
- DesignTimeParseData.cs
- InteropExecutor.cs
- BlockCollection.cs
- MatrixAnimationBase.cs
- DummyDataSource.cs
- safelink.cs
- CodeSubDirectoriesCollection.cs
- TraceLevelStore.cs
- DesigntimeLicenseContext.cs