Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Annotations / Anchoring / FixedPageProcessor.cs / 1305600 / FixedPageProcessor.cs
//------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // This processor looks for FixedPage elements. When generating // locators it produces a locator part identifying the FixedPage's // index in the parent FixedDocument. When resolving, it looks for // the FixedPage in the required index. When processing it // processes annotations for any FixedPage it finds. // // History: // 12/02/2003: rruiz: Added internal class for use by PageViewer // 10/20/2004: rruiz: Moved class to MS.Internal namespace. // 11/01/2004: ssimova: added processing for FixedPageProxys // //----------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Collections; using System.Collections.Generic; using System.Globalization; using System.Xml; using System.Windows; using System.Windows.Annotations; using System.Windows.Annotations.Storage; using System.Windows.Controls.Primitives; using System.Windows.Documents; using System.Windows.Media; using MS.Utility; namespace MS.Internal.Annotations.Anchoring { ////// This processor looks for FixedPage elements. When generating /// locators it produces a locator part identifying the FixedPage's /// index in the parent FixedDocument. When resolving, it looks for /// the FixedPage in the required index. When processing it /// processes annotations for any FixedPage it finds. /// internal class FixedPageProcessor : SubTreeProcessor { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors ////// Creates an instance of FixedPageProcessor. /// /// the manager that owns this processor ///manager is null public FixedPageProcessor(LocatorManager manager) : base(manager) { } #endregion Constructors //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- #region Public Methods ////// If the node is a 'chunk' of fingerprintable text, /// LocatorManager.ProcessAnnotations is called. /// /// node to process /// indicates the callback was called by /// this processor ////// a list of AttachedAnnotations loaded during the processing of /// the node; can be null if the node is not a FixedPage, or empty /// if the node is FixedPage, but annotations are not loaded /// ///node is null public override IListPreProcessNode(DependencyObject node, out bool calledProcessAnnotations) { if (node == null) throw new ArgumentNullException("node"); DocumentPageView dpv = node as DocumentPageView; if (dpv != null && (dpv.DocumentPage is FixedDocumentPage || dpv.DocumentPage is FixedDocumentSequenceDocumentPage)) { calledProcessAnnotations = true; return Manager.ProcessAnnotations(dpv); } calledProcessAnnotations = false; return null; } /// /// Generates locators identifying 'chunks'. If node is a chunk, /// generates a locator with a single locator part containing a /// fingerprint of the chunk. Otherwise null is returned. /// /// the node to generate a locator for /// return flag indicating whether the search /// should continue (presumably because the search was not exhaustive). /// This processor will always return true because it is possible to locate /// parts of the node (if it is FixedPage or FixedPageProxy) ///if node is a FixedPage or FixedPageProxy, a ContentLocator /// with a single locator part containing the page number; null if node is not /// FixedPage or FixedPageProxy ///node is null ///node points to a Document Page View which /// doesn't contain a FixedDocumentPage public override ContentLocator GenerateLocator(PathNode node, out bool continueGenerating) { if (node == null) throw new ArgumentNullException("node"); // Initial value continueGenerating = true; ContentLocator locator = null; DocumentPageView dpv = node.Node as DocumentPageView; int pageNb = -1; if (dpv != null) { // Only produce locator parts for FixedDocumentPages if (dpv.DocumentPage is FixedDocumentPage || dpv.DocumentPage is FixedDocumentSequenceDocumentPage) { pageNb = dpv.PageNumber; } } else { FixedTextSelectionProcessor.FixedPageProxy fPage = node.Node as FixedTextSelectionProcessor.FixedPageProxy; if (fPage != null) { pageNb = fPage.Page; } } if (pageNb >= 0) { locator = new ContentLocator(); ContentLocatorPart locatorPart = CreateLocatorPart(pageNb); locator.Parts.Add(locatorPart); } return locator; } ////// Searches the logical tree for a node matching the values of /// locatorPart. A match must be a chunk which produces the same /// fingerprint as in the locator part. /// /// locator part to be matched, must be of the type /// handled by this processor /// logical tree node to start search at /// return flag indicating whether the search /// should continue (presumably because the search was not exhaustive). This /// processor will return false if the startNode is a FixedPage /// with a different page number than the locator part's page number. /// Otherwise the return value will be true. /// inside the FixedPage(like TextSelection) ///returns a node that matches the locator part; null if no such /// node is found ///locatorPart or startNode are /// null ///locatorPart is of the incorrect /// type public override DependencyObject ResolveLocatorPart(ContentLocatorPart locatorPart, DependencyObject startNode, out bool continueResolving) { if (locatorPart == null) throw new ArgumentNullException("locatorPart"); if (startNode == null) throw new ArgumentNullException("startNode"); if (PageNumberElementName != locatorPart.PartType) throw new ArgumentException(SR.Get(SRID.IncorrectLocatorPartType, locatorPart.PartType.Namespace + ":" + locatorPart.PartType.Name), "locatorPart"); // Initial value continueResolving = true; int pageNumber = 0; string pageNumberString = locatorPart.NameValuePairs[ValueAttributeName]; if (pageNumberString != null) pageNumber = Int32.Parse(pageNumberString, NumberFormatInfo.InvariantInfo); else throw new ArgumentException(SR.Get(SRID.IncorrectLocatorPartType, locatorPart.PartType.Namespace + ":" + locatorPart.PartType.Name), "locatorPart"); // Get the actual FixedPage for the page number specified in the LocatorPart. We need // the actual FixedPage cause its what exists in the visual tree and what we'll use to // anchor the annotations to. FixedDocumentPage page = null; IDocumentPaginatorSource document = null; DocumentPageView dpv = null; if (_useLogicalTree) { document = startNode as FixedDocument; if (document != null) { page = document.DocumentPaginator.GetPage(pageNumber) as FixedDocumentPage; } else { document = startNode as FixedDocumentSequence; if (document != null) { FixedDocumentSequenceDocumentPage sequencePage = document.DocumentPaginator.GetPage(pageNumber) as FixedDocumentSequenceDocumentPage; if (sequencePage != null) { page = sequencePage.ChildDocumentPage as FixedDocumentPage; } } } } else { dpv = startNode as DocumentPageView; if (dpv != null) { page = dpv.DocumentPage as FixedDocumentPage; if (page == null) { FixedDocumentSequenceDocumentPage sequencePage = dpv.DocumentPage as FixedDocumentSequenceDocumentPage; if (sequencePage != null) { page = sequencePage.ChildDocumentPage as FixedDocumentPage; } } // If this was the wrong fixed page we want to stop searching this subtree if (page != null && dpv.PageNumber != pageNumber) { continueResolving = false; page = null; } } } if (page != null) { return page.FixedPage; } return null; } ////// Returns a list of XmlQualifiedNames representing the /// the locator parts this processor can resolve/generate. /// public override XmlQualifiedName[] GetLocatorPartTypes() { return (XmlQualifiedName[])LocatorPartTypeNames.Clone(); } #endregion Public Methods //------------------------------------------------------ // // Public Operators // //------------------------------------------------------ //----------------------------------------------------- // // Public Events // //------------------------------------------------------ //----------------------------------------------------- // // Public Properties // //----------------------------------------------------- #region Public Properties ////// Id used to register this processor with the LocatorManager. Registration /// is done by the framework and does not need to be repeated. Use this /// string in markup as a value for SubTreeProcessorIdProperty. /// public static readonly String Id = "FixedPage"; #endregion Public Properties //----------------------------------------------------- // // Internal Properties // //------------------------------------------------------ #region Internal Properties internal bool UseLogicalTree { set { _useLogicalTree = value; } } #endregion Internal Properties //----------------------------------------------------- // // Private Methods // //------------------------------------------------------ #region Private Methods ////// Creates an instance of the locator part type handled by this /// handler that represents node. /// /// FixedPage for which a locator part will be created ////// a locator part of the type handled by this handler representing /// the passed in node; null is returned if the locator part cannot /// be created for the node /// static internal ContentLocatorPart CreateLocatorPart(int page) { Debug.Assert(page >= 0, "page can not be negative"); ContentLocatorPart part = new ContentLocatorPart(PageNumberElementName); part.NameValuePairs.Add(ValueAttributeName, page.ToString(NumberFormatInfo.InvariantInfo)); return part; } #endregion Private Methods //------------------------------------------------------ // // Private Fields // //----------------------------------------------------- #region Private Fields // Name of the value attribute containing the hash private static readonly String ValueAttributeName = "Value"; // Name of the locator part produced by this processor. private static readonly XmlQualifiedName PageNumberElementName = new XmlQualifiedName("PageNumber", AnnotationXmlConstants.Namespaces.BaseSchemaNamespace); // ContentLocatorPart types understood by this processor private static readonly XmlQualifiedName[] LocatorPartTypeNames = new XmlQualifiedName[] { PageNumberElementName }; // Specifies whether the processor should use the logical tree to resolve locator parts. // If this is false (the default) only visible pages will be found. private bool _useLogicalTree = false; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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