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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// Description:
// Implements the FixedDocument element
//
// FixedPage changes.mht
namespace System.Windows.Documents
{
using MS.Internal; // DoubleUtil
using MS.Internal.Documents;
using MS.Utility; // ExceptionStringTable
using MS.Internal.Utility;
using System.Windows.Threading; // Dispatcher
using System.Windows; // DependencyID etc.
using System.Windows.Automation.Peers; // AutomationPeer
using System.Windows.Documents; // DocumentPaginator
using System.Windows.Documents.DocumentStructures;
using System.Windows.Media; // Visual
using System.Windows.Markup; // IAddChild, ContentPropertyAttribute
using System.Windows.Shapes; // Glyphs
using System;
using System.IO;
using System.IO.Packaging;
using System.Net;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel; // DesignerSerializationVisibility
using System.Diagnostics;
using System.Globalization;
using System.Runtime.Serialization.Formatters.Binary;
using MS.Internal.Annotations.Component;
using System.Windows.Navigation;
using System.Windows.Controls;
using System.Text;
using MS.Internal.IO.Packaging;
using System.Security;
using PackUriHelper = System.IO.Packaging.PackUriHelper;
//=====================================================================
/// <summary>
/// FixedDocument is the spine of a portable, high fidelity fixed-format
/// document, where the pages are stitched together. The FixedDocument
/// elements provides and formats pages as requested. It also provides
/// a Text OM on top of the fixed-format document to allow for read-only
/// editing (selection, keyboard navigation, find, etc.).
/// </summary>
[ContentProperty("Pages")]
public class FixedDocument : FrameworkContentElement, IDocumentPaginatorSource, IAddChildInternal, IServiceProvider, IFixedNavigate, IUriContext
{
//--------------------------------------------------------------------
//
// Constructors
//
//---------------------------------------------------------------------
#region Constructors
static FixedDocument()
{
FocusableProperty.OverrideMetadata(typeof(FixedDocument), new FrameworkPropertyMetadata(true));
NavigationService.NavigationServiceProperty.OverrideMetadata(
typeof(FixedDocument),
new FrameworkPropertyMetadata(new PropertyChangedCallback(FixedHyperLink.OnNavigationServiceChanged)));
}
/// <summary>
/// Default FixedDocument constructor
/// </summary>
/// <remarks>
/// Automatic determination of current UIContext. Use alternative constructor
/// that accepts a UIContext for best performance.
/// </remarks>
public FixedDocument()
: base()
{
_Init();
}
#endregion Constructors
//--------------------------------------------------------------------
//
// Public Methods
//
//---------------------------------------------------------------------
#region IServiceProvider Members
/// <summary>
/// Returns service objects associated with this control.
/// </summary>
/// <remarks>
/// FixedDocument currently supports TextContainer.
/// </remarks>
/// <exception cref="ArgumentNullException">serviceType is NULL.</exception>
/// <param name="serviceType">
/// Specifies the type of service object to get.
/// </param>
object IServiceProvider.GetService(Type serviceType)
{
// Dispatcher.VerifyAccess();
ArgumentNullException.ThrowIfNull(serviceType);
if (serviceType == typeof(ITextContainer))
{
return this.FixedContainer;
}
if (serviceType == typeof(RubberbandSelector))
{
// create this on demand, but not through the property, only through the
// service, so it is only created when it's actually used
if (_rubberbandSelector == null)
{
_rubberbandSelector = new RubberbandSelector();
}
return _rubberbandSelector;
}
return null;
}
#endregion IServiceProvider Members
#region IAddChild
///<summary>
/// Called to Add the object as a Child.
///</summary>
/// <exception cref="ArgumentNullException">value is NULL.</exception>
/// <exception cref="ArgumentException">value is not of type PageContent.</exception>
/// <exception cref="InvalidOperationException">A PageContent cannot be added while previous partial page isn't completely Loaded.</exception>
///<param name="value">
/// Object to add as a child
///</param>
void IAddChild.AddChild(Object value)
{
ArgumentNullException.ThrowIfNull(value);
// Dispatcher.VerifyAccess();
PageContent fp = value as PageContent;
if (fp == null)
{
throw new ArgumentException(SR.Format(SR.UnexpectedParameterType, value.GetType(), typeof(PageContent)), "value");
}
if (fp.IsInitialized)
{
_pages.Add(fp);
}
else
{
DocumentsTrace.FixedFormat.FixedDocument.Trace($"Page {_pages.Count} Deferred");
if (_partialPage == null)
{
_partialPage = fp;
_partialPage.ChangeLogicalParent(this);
_partialPage.Initialized += new EventHandler(OnPageLoaded);
}
else
{
throw new InvalidOperationException(SR.PrevoiusPartialPageContentOutstanding);
}
}
}
///<summary>
/// Called when text appears under the tag in markup
///</summary>
///<param name="text">
/// Text to Add to the Object
///</param>
/// <ExternalAPI/>
void IAddChild.AddText(string text)
{
XamlSerializerUtil.ThrowIfNonWhiteSpaceInAddText(text, this);
}
#endregion
#region IUriContext
/// <summary>
/// <see cref="IUriContext.BaseUri" />
/// </summary>
Uri IUriContext.BaseUri
{
get { return (Uri) GetValue(BaseUriHelper.BaseUriProperty); }
set { SetValue(BaseUriHelper.BaseUriProperty, value); }
}
#endregion IUriContext
#region IFixedNavigate
void IFixedNavigate.NavigateAsync(string elementID)
{
if (IsPageCountValid == true)
{
FixedHyperLink.NavigateToElement(this, elementID);
}
else
{
_navigateAfterPagination = true;
_navigateFragment = elementID;
}
}
UIElement IFixedNavigate.FindElementByID(string elementID, out FixedPage rootFixedPage)
{
UIElement uiElementRet = null;
rootFixedPage = null;
if (Char.IsDigit(elementID[0]))
{
//
//We convert string to a page number here.
//
int pageNumber = Convert.ToInt32(elementID, CultureInfo.InvariantCulture);
//
// Metro defines all external page are 1 based. All internals are 0 based.
//
pageNumber --;
uiElementRet = GetFixedPage(pageNumber);
rootFixedPage = GetFixedPage(pageNumber);
}
else
{
//
// We need iterate through the PageContentCollect first.
//
PageContentCollection pc = this.Pages;
PageContent pageContent;
FixedPage fixedPage;
for (int i = 0, n = pc.Count; i < n; i++)
{
pageContent = pc[i];
//
// If PageStream is non null, it is not PPS. Otherwise, need to check LinkTargets collection
// of PageContent
//
if (pageContent.PageStream != null)
{
fixedPage = GetFixedPage(i);
if (fixedPage != null)
{
uiElementRet = ((IFixedNavigate)fixedPage).FindElementByID(elementID, out rootFixedPage);
if (uiElementRet != null)
{
break;
}
}
}
else
{
if (pageContent.ContainsID(elementID))
{
fixedPage = GetFixedPage(i);
if (fixedPage != null)
{
uiElementRet = ((IFixedNavigate)fixedPage).FindElementByID(elementID, out rootFixedPage);
if (uiElementRet == null)
{ // return that page if we can't find the named fragment
uiElementRet = fixedPage;
}
//
// we always break here because pageContent include the named fragment
//
break;
}
}
}
}
}
return uiElementRet;
}
internal NavigationService NavigationService
{
get { return (NavigationService) GetValue(NavigationService.NavigationServiceProperty); }
set { SetValue(NavigationService.NavigationServiceProperty, value); }
}
#endregion
#region LogicalTree
/// <summary>
/// Returns enumerator to logical children
/// </summary>
protected internal override IEnumerator LogicalChildren
{
get
{
// this.Dispatcher.VerifyAccess();
return this.Pages.GetEnumerator();
}
}
#endregion LogicalTree
#region IDocumentPaginatorSource Members
/// <summary>
/// An object which paginates content.
/// </summary>
public DocumentPaginator DocumentPaginator
{
get { return _paginator; }
}
#endregion IDocumentPaginatorSource Members
#region Document Overrides
/// <summary>
/// <see cref="System.Windows.Documents.DocumentPaginator.GetPage(int)"/>
/// </summary>
/// <exception cref="ArgumentOutOfRangeException">pageNumber is less than zero.</exception>
/// <param name="pageNumber">
/// The page number.
/// </param>
internal DocumentPage GetPage(int pageNumber)
{
DocumentsTrace.FixedFormat.IDF.Trace($"IDP.GetPage({pageNumber})");
// Make sure that the call is in the right context.
// Dispatcher.VerifyAccess();
// Page number cannot be negative.
if (pageNumber < 0)
{
throw new ArgumentOutOfRangeException("pageNumber", SR.IDPNegativePageNumber);
}
if (pageNumber < Pages.Count)
{
//
// If we are not out of bound, try next page
//
FixedPage page = SyncGetPage(pageNumber, false/*forceReload*/);
if (page == null)
{
return DocumentPage.Missing;
}
Debug.Assert(page != null);
Size fixedSize = ComputePageSize(page);
// Always measure with fixed size instead of using constraint
FixedDocumentPage dp = new FixedDocumentPage(this, page, fixedSize, pageNumber);
page.Measure(fixedSize);
page.Arrange(new Rect(new Point(), fixedSize));
return dp;
}
return DocumentPage.Missing;
}
/// <summary>
/// <see cref="System.Windows.Documents.DocumentPaginator.GetPageAsync(int,object)"/>
/// </summary>
/// <exception cref="ArgumentOutOfRangeException">pageNumber is less than zero.</exception>
/// <exception cref="ArgumentNullException">userState is NULL.</exception>
internal void GetPageAsync(int pageNumber, object userState)
{
DocumentsTrace.FixedFormat.IDF.Trace($"IDP.GetPageAsync({pageNumber}, {userState})");
// Make sure that the call is in the right context.
// Dispatcher.VerifyAccess();
// Page number cannot be negative.
if (pageNumber < 0)
{
throw new ArgumentOutOfRangeException("pageNumber", SR.IDPNegativePageNumber);
}
ArgumentNullException.ThrowIfNull(userState);
if (pageNumber < Pages.Count)
{
PageContent pc = Pages[pageNumber];
// Add to outstanding AsyncOp list
GetPageAsyncRequest asyncRequest = new GetPageAsyncRequest(pc, pageNumber, userState);
_asyncOps[userState] = asyncRequest;
DispatcherOperationCallback queueTask = new DispatcherOperationCallback(GetPageAsyncDelegate);
Dispatcher.BeginInvoke(DispatcherPriority.Background, queueTask, asyncRequest);
}
else
{
_NotifyGetPageAsyncCompleted(DocumentPage.Missing, pageNumber, null, false, userState);
}
}
/// <summary>
/// <see cref="DynamicDocumentPaginator.GetPageNumber"/>
/// </summary>
/// <exception cref="ArgumentNullException">contentPosition is NULL.</exception>
/// <exception cref="ArgumentException">ContentPosition does not exist within this element?s tree.</exception>
internal int GetPageNumber(ContentPosition contentPosition)
{
// Dispatcher.VerifyAccess();
ArgumentNullException.ThrowIfNull(contentPosition);
FixedTextPointer fixedTextPointer = contentPosition as FixedTextPointer;
if (fixedTextPointer == null)
{
throw new ArgumentException(SR.IDPInvalidContentPosition);
}
return fixedTextPointer.FixedTextContainer.GetPageNumber(fixedTextPointer);
}
/// <summary>
/// <see cref="System.Windows.Documents.DocumentPaginator.CancelAsync"/>
/// </summary>
/// <exception cref="ArgumentNullException">userState is NULL.</exception>
internal void CancelAsync(object userState)
{
DocumentsTrace.FixedFormat.IDF.Trace($"IDP.GetPageAsyncCancel([{userState}])");
// Dispatcher.VerifyAccess();
ArgumentNullException.ThrowIfNull(userState);
GetPageAsyncRequest asyncRequest;
if (_asyncOps.TryGetValue(userState,out asyncRequest))
{
if (asyncRequest != null)
{
asyncRequest.Cancelled = true;
asyncRequest.PageContent.GetPageRootAsyncCancel();
}
}
}
/// <summary>
/// <see cref="DynamicDocumentPaginator.GetObjectPosition"/>
/// </summary>
/// <exception cref="ArgumentNullException">element is NULL.</exception>
internal ContentPosition GetObjectPosition(Object o)
{
ArgumentNullException.ThrowIfNull(o);
DependencyObject element = o as DependencyObject;
if (element == null)
{
throw new ArgumentException(SR.FixedDocumentExpectsDependencyObject);
}
DocumentsTrace.FixedFormat.IDF.Trace($"IDF.GetContentPositionForElement({element})");
// Make sure that the call is in the right context.
// Dispatcher.VerifyAccess();
// walk up the logical parent chain to find the containing page
FixedPage fixedPage = null;
int pageIndex = -1;
if (element != this)
{
DependencyObject el = element;
while (el != null)
{
fixedPage = el as FixedPage;
if (fixedPage != null)
{
pageIndex = GetIndexOfPage(fixedPage);
if (pageIndex >= 0)
{
break;
}
el = fixedPage.Parent;
}
else
{
el = LogicalTreeHelper.GetParent(el);
}
}
}
else if (this.Pages.Count > 0)
{
// if FixedDocument is requested, return ContentPosition for the first page.
pageIndex = 0;
}
// get FixedTextPointer for element or page index
FixedTextPointer fixedTextPointer = null;
if (pageIndex >= 0)
{
FixedPosition fixedPosition;
FlowPosition flowPosition=null;
System.Windows.Shapes.Path p = element as System.Windows.Shapes.Path;
if (element is Glyphs || element is Image || (p != null && p.Fill is ImageBrush))
{
fixedPosition = new FixedPosition(fixedPage.CreateFixedNode(pageIndex, (UIElement)element), 0);
flowPosition = FixedContainer.FixedTextBuilder.CreateFlowPosition(fixedPosition);
}
if (flowPosition == null)
{
flowPosition = FixedContainer.FixedTextBuilder.GetPageStartFlowPosition(pageIndex);
}
fixedTextPointer = new FixedTextPointer(true, LogicalDirection.Forward, flowPosition);
}
return (fixedTextPointer != null) ? fixedTextPointer : ContentPosition.Missing;
}
/// <summary>
/// <see cref="DynamicDocumentPaginator.GetPagePosition"/>
/// </summary>
internal ContentPosition GetPagePosition(DocumentPage page)
{
FixedDocumentPage docPage = page as FixedDocumentPage;
if (docPage == null)
{
return ContentPosition.Missing;
}
return docPage.ContentPosition;
}
/// <summary>
/// <see cref="System.Windows.Documents.DocumentPaginator.IsPageCountValid"/>
/// </summary>
internal bool IsPageCountValid { get { return this.IsInitialized; } }
/// <summary>
/// <see cref="System.Windows.Documents.DocumentPaginator.PageCount"/>
/// </summary>
internal int PageCount { get { return Pages.Count; } }
/// <summary>
/// <see cref="System.Windows.Documents.DocumentPaginator.PageSize"/>
/// </summary>
internal Size PageSize
{
get { return new Size(_pageWidth, _pageHeight); }
set { _pageWidth = value.Width; _pageHeight = value.Height; }
}
internal bool HasExplicitStructure
{
get
{
return _hasExplicitStructure;
}
}
#endregion Document Overrides
//-------------------------------------------------------------- ------
//
// Public Properties
//
//---------------------------------------------------------------------
#region Public Properties
/// <summary>
/// Get a collection of PageContent that this FixedDocument contains.
/// </summary>
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Content)]
public PageContentCollection Pages
{
get
{
return _pages;
}
}
/// <summary>
///
/// </summary>
public static readonly DependencyProperty PrintTicketProperty
= DependencyProperty.RegisterAttached("PrintTicket", typeof(object), typeof(FixedDocument),
new FrameworkPropertyMetadata((object)null));
/// <summary>
/// Get/Set PrintTicket Property
/// </summary>
public object PrintTicket
{
get
{
object printTicket = GetValue(PrintTicketProperty);
return printTicket;
}
set
{
SetValue(PrintTicketProperty,value);
}
}
#endregion Public Properties
//--------------------------------------------------------------------
//
// Protected Methods
//
//---------------------------------------------------------------------
#region Protected Methods
/// <summary>
/// Creates AutomationPeer (<see cref="ContentElement.OnCreateAutomationPeer"/>)
/// </summary>
protected override AutomationPeer OnCreateAutomationPeer()
{
return new DocumentAutomationPeer(this);
}
#endregion Protected Methods
//--------------------------------------------------------------------
//
// Internal Methods
//
//---------------------------------------------------------------------
#region Internal Methods
internal int GetIndexOfPage(FixedPage p)
{
PageContentCollection pc = this.Pages;
for (int i = 0, n = pc.Count; i < n; i++)
{
if (pc[i].IsOwnerOf(p))
{
return i;
}
}
return -1;
}
internal bool IsValidPageIndex(int index)
{
return (index >= 0 && index < this.Pages.Count);
}
// Check index before trying to load page
internal FixedPage SyncGetPageWithCheck(int index)
{
if (IsValidPageIndex(index))
{
return SyncGetPage(index, false /*forceReload*/);
}
DocumentsTrace.FixedFormat.FixedDocument.Trace($"SyncGetPageWithCheck {index} is invalid page");
return null;
}
// Assumes index is valid
internal FixedPage SyncGetPage(int index, bool forceReload)
{
DocumentsTrace.FixedFormat.FixedDocument.Trace($"SyncGetPage {index}");
Debug.Assert(IsValidPageIndex(index));
PageContentCollection pc = this.Pages;
FixedPage fp;
try
{
fp = (FixedPage)pc[index].GetPageRoot(forceReload);
}
catch (Exception e)
{
if (e is InvalidOperationException || e is ApplicationException)
{
ApplicationException ae = new ApplicationException(string.Format(System.Globalization.CultureInfo.CurrentCulture, SR.ExceptionInGetPage, index), e);
throw ae;
}
else
{
throw;
}
}
return fp;
}
/// <summary>
/// Callback when a new PageContent is added
/// </summary>
internal void OnPageContentAppended(int index)
{
FixedContainer.FixedTextBuilder.AddVirtualPage();
_paginator.NotifyPaginationProgress(new PaginationProgressEventArgs(index, 1));
if (this.IsInitialized)
{
_paginator.NotifyPagesChanged(new PagesChangedEventArgs(index, 1));
}
}
//
// Make sure page has its width and height.
// If absoluteOnly is specified, it will overwrite relative size specified
// on page with default page size.
//
internal void EnsurePageSize(FixedPage fp)
{
Debug.Assert(fp != null);
double width = fp.Width;
if (double.IsNaN(width))
{
fp.Width = _pageWidth;
}
double height = fp.Height;
if (double.IsNaN(height))
{
fp.Height = _pageHeight;
}
}
// Note: This code is specifically written for PageViewer.
// Once PageViewer get away from inquring page size before
// displaying page, we should remove this function.
internal bool GetPageSize(ref Size pageSize, int pageNumber)
{
DocumentsTrace.FixedFormat.FixedDocument.Trace($"GetPageSize {pageNumber}");
if (pageNumber < Pages.Count)
{
// NOTE: it is wrong to call this method when page is outstanding.
// Unfortunately PageViewer + DocumentPaginator still is dependent on
// PageSize, so have to avoid throwing exception in this situation.
FixedPage p = null;
if (!_pendingPages.Contains(Pages[pageNumber]))
{
p = SyncGetPage(pageNumber, false /*forceReload*/);
}
#if DEBUG
else
{
DocumentsTrace.FixedFormat.FixedDocument.Trace($"====== GetPageSize {pageNumber} Warning sync call made while async outstanding =====");
}
#endif
// ComputePageSize will return appropriate value for null page
pageSize = ComputePageSize(p);
return true;
}
return false;
}
//
// Get absolute page size. If relative page size is specified
// in the page, it will be overwritten by default page size,
// which is absolute size.
//
internal Size ComputePageSize(FixedPage fp)
{
if (fp == null)
{
return new Size(_pageWidth, _pageHeight);
}
EnsurePageSize(fp);
return new Size(fp.Width, fp.Height);
}
#endregion Internal Methods
//--------------------------------------------------------------------
//
// Internal Properties
//
//---------------------------------------------------------------------
#region Internal Properties
// expose the hosted FixedContainer
internal FixedTextContainer FixedContainer
{
get
{
if (_fixedTextContainer == null)
{
_fixedTextContainer = new FixedTextContainer(this);
_fixedTextContainer.Highlights.Changed += new HighlightChangedEventHandler(OnHighlightChanged);
}
return _fixedTextContainer;
}
}
internal Dictionary<FixedPage, ArrayList> Highlights
{
get
{
return _highlights;
}
}
internal DocumentReference DocumentReference
{
get
{
return _documentReference;
}
set
{
_documentReference = value;
}
}
#endregion Internal Properties
//--------------------------------------------------------------------
//
// Private Methods
//
//---------------------------------------------------------------------
#region Private Methods
//---------------------------------------
// Initialization
//---------------------------------------
private void _Init()
{
_paginator = new FixedDocumentPaginator(this);
_pages = new PageContentCollection(this);
_highlights = new Dictionary<FixedPage, ArrayList>();
_asyncOps = new Dictionary<Object, GetPageAsyncRequest>();
_pendingPages = new List<PageContent>();
_hasExplicitStructure = false;
this.Initialized += new EventHandler(OnInitialized);
}
private void OnInitialized(object sender, EventArgs e)
{
if (_navigateAfterPagination)
{
FixedHyperLink.NavigateToElement(this, _navigateFragment);
_navigateAfterPagination = false;
}
//Currently we don't load the DocumentStructure part
//At least we need to validate if it's there
ValidateDocStructure();
if (PageCount > 0)
{
DocumentPage docPage = GetPage(0);
if (docPage != null)
{
FixedPage page = docPage.Visual as FixedPage;
if (page != null)
{
this.Language = page.Language;
}
}
}
_paginator.NotifyPaginationCompleted(e);
}
internal void ValidateDocStructure()
{
Uri baseUri = BaseUriHelper.GetBaseUri(this);
if (baseUri.Scheme.Equals(PackUriHelper.UriSchemePack, StringComparison.OrdinalIgnoreCase))
{
// avoid the case of pack://application,,,
if (baseUri.Host.Equals(BaseUriHelper.PackAppBaseUri.Host) != true &&
baseUri.Host.Equals(BaseUriHelper.SiteOfOriginBaseUri.Host) != true)
{
Uri structureUri = GetStructureUriFromRelationship(baseUri, _structureRelationshipName);
if (structureUri != null)
{
ContentType mimeType;
ValidateAndLoadPartFromAbsoluteUri(structureUri, true, "DocumentStructure", out mimeType);
if (!_documentStructureContentType.AreTypeAndSubTypeEqual(mimeType))
{
throw new FileFormatException(SR.InvalidDSContentType);
}
_hasExplicitStructure = true;
}
}
}
}
internal static StoryFragments GetStoryFragments(FixedPage fixedPage)
{
object o = null;
Uri baseUri = BaseUriHelper.GetBaseUri(fixedPage);
if (baseUri.Scheme.Equals(PackUriHelper.UriSchemePack, StringComparison.OrdinalIgnoreCase))
{
// avoid the case of pack://application,,,
if (baseUri.Host.Equals(BaseUriHelper.PackAppBaseUri.Host) != true &&
baseUri.Host.Equals(BaseUriHelper.SiteOfOriginBaseUri.Host) != true)
{
Uri structureUri = GetStructureUriFromRelationship(baseUri, _storyFragmentsRelationshipName);
if (structureUri != null)
{
ContentType mimeType;
o = ValidateAndLoadPartFromAbsoluteUri(structureUri, false, null, out mimeType);
if (!_storyFragmentsContentType.AreTypeAndSubTypeEqual(mimeType))
{
throw new FileFormatException(SR.InvalidSFContentType);
}
if (!(o is StoryFragments))
{
throw new FileFormatException(SR.InvalidStoryFragmentsMarkup);
}
}
}
}
return o as StoryFragments;
}
private static object ValidateAndLoadPartFromAbsoluteUri(Uri AbsoluteUriDoc, bool validateOnly, string rootElement, out ContentType mimeType)
{
mimeType = null;
Stream pageStream = null;
object o = null;
try
{
pageStream = WpfWebRequestHelper.CreateRequestAndGetResponseStream(AbsoluteUriDoc, out mimeType);
ParserContext pc = new ParserContext();
pc.BaseUri = AbsoluteUriDoc;
XpsValidatingLoader loader = new XpsValidatingLoader();
if (validateOnly)
{
loader.Validate(pageStream, null, pc, mimeType, rootElement);
}
else
{
o = loader.Load(pageStream, null, pc, mimeType);
}
}
catch (Exception e)
{
//System.Net.WebException will be thrown when the document structure does not exist in a non-container
//and System.InvalidOperation will be thrown when calling Package.GetPart() in a container.
//We ignore these but all others need to be rethrown
if (!(e is System.Net.WebException || e is System.InvalidOperationException))
{
throw;
}
}
return o;
}
/// <summary>
/// Retrieves the Uri for the DocumentStructure from the container's relationship
/// </summary>
static private Uri GetStructureUriFromRelationship(Uri contentUri, string relationshipName)
{
Uri absTargetUri = null;
if (contentUri != null && relationshipName != null)
{
Uri partUri = PackUriHelper.GetPartUri(contentUri);
if (partUri != null)
{
Uri packageUri = PackUriHelper.GetPackageUri(contentUri);
Package package = PreloadedPackages.GetPackage(packageUri);
if (package == null)
{
package = PackageStore.GetPackage(packageUri);
}
if (package != null)
{
PackagePart part = package.GetPart(partUri);
PackageRelationshipCollection resources = part.GetRelationshipsByType(relationshipName);
Uri targetUri = null;
foreach (PackageRelationship relationShip in resources)
{
targetUri = PackUriHelper.ResolvePartUri(partUri, relationShip.TargetUri);
}
if (targetUri != null)
{
absTargetUri = PackUriHelper.Create(packageUri, targetUri);
}
}
}
}
return absTargetUri;
}
private void OnPageLoaded(object sender, EventArgs e)
{
PageContent pc = (PageContent)sender;
if (pc == _partialPage)
{
DocumentsTrace.FixedFormat.FixedDocument.Trace($"Loaded Page {_pages.Count}");
_partialPage.Initialized -= new EventHandler(OnPageLoaded);
_pages.Add(_partialPage);
_partialPage = null;
}
}
internal FixedPage GetFixedPage(int pageNumber)
{
FixedPage fp = null;
FixedDocumentPage fdp = GetPage(pageNumber) as FixedDocumentPage;
if (fdp != null && fdp != DocumentPage.Missing)
{
fp = fdp.FixedPage;
}
return fp;
}
//---------------------------------------
// Text Editing
//---------------------------------------
private void OnHighlightChanged(object sender, HighlightChangedEventArgs args)
{
Debug.Assert(sender != null);
Debug.Assert(args != null);
Debug.Assert(args.Ranges != null);
DocumentsTrace.FixedTextOM.Highlight.Trace($"HightlightMoved From {0}-{0} To {0}-{0}");
Debug.Assert(args.Ranges.Count > 0 && ((TextSegment)args.Ranges[0]).Start.CompareTo(((TextSegment)args.Ranges[0]).End) < 0);
// REVIEW:benwest:7/9/2004: This code is reseting the entire highlight data structure
// on every highlight delta, which scales horribly. It should be possible
// to make incremental changes as new deltas arrive.
// Add new highlights, if any
ITextContainer tc = this.FixedContainer;
Highlights highlights = null;
// If this document is part of a FixedDocumentSequence, we should use
// the highlights that have been set on the sequence.
FixedDocumentSequence parent = this.Parent as FixedDocumentSequence;
if (parent != null)
highlights = parent.TextContainer.Highlights;
else
highlights = this.FixedContainer.Highlights;
StaticTextPointer highlightTransitionPosition;
StaticTextPointer highlightRangeStart;
object selected;
//Find out if any highlights have been removed. We need to invalidate those pages
List<FixedPage> oldHighlightPages = new List<FixedPage>();
foreach (FixedPage page in _highlights.Keys)
{
oldHighlightPages.Add(page);
}
_highlights.Clear();
highlightTransitionPosition = tc.CreateStaticPointerAtOffset(0);
while (true)
{
// Move to the next highlight start.
if (!highlights.IsContentHighlighted(highlightTransitionPosition, LogicalDirection.Forward))
{
highlightTransitionPosition = highlights.GetNextHighlightChangePosition(highlightTransitionPosition, LogicalDirection.Forward);
// No more highlights?
if (highlightTransitionPosition.IsNull)
break;
}
// highlightTransitionPosition is at the start of a new highlight run.
// Get the highlight data.
// NB: this code only recognizes typeof(TextSelection) + AnnotationHighlight.
// We should add code here to handle other properties: foreground/background/etc.
selected = highlights.GetHighlightValue(highlightTransitionPosition, LogicalDirection.Forward, typeof(TextSelection));
// Save the start position and find the end.
highlightRangeStart = highlightTransitionPosition;
//placeholder for highlight type
FixedHighlightType fixedHighlightType = FixedHighlightType.None;
Brush foreground = null;
Brush background = null;
// Store the highlight.
if (selected != DependencyProperty.UnsetValue)
{
//find next TextSelection change.
//This is to skip AnnotationHighlight
//change positions, since Annotation Highlight is invisible under TextSelection
do
{
highlightTransitionPosition = highlights.GetNextHighlightChangePosition(highlightTransitionPosition, LogicalDirection.Forward);
Debug.Assert(!highlightTransitionPosition.IsNull, "Highlight start not followed by highlight end!");
}
while (highlights.GetHighlightValue(highlightTransitionPosition, LogicalDirection.Forward, typeof(TextSelection)) != DependencyProperty.UnsetValue);
fixedHighlightType = FixedHighlightType.TextSelection;
foreground = null;
background = null;
}
else
{
//look for annotation highlight
AnnotationHighlightLayer.HighlightSegment highlightSegment = highlights.GetHighlightValue(highlightRangeStart,
LogicalDirection.Forward, typeof(HighlightComponent)) as AnnotationHighlightLayer.HighlightSegment;
if (highlightSegment != null)
{
//this is a visible annotation highlight
highlightTransitionPosition = highlights.GetNextHighlightChangePosition(highlightTransitionPosition, LogicalDirection.Forward);
Debug.Assert(!highlightTransitionPosition.IsNull, "Highlight start not followed by highlight end!");
fixedHighlightType = FixedHighlightType.AnnotationHighlight;
background = highlightSegment.Fill;
}
}
//generate fixed highlight if a highlight was has been found
if (fixedHighlightType != FixedHighlightType.None)
{
this.FixedContainer.GetMultiHighlights((FixedTextPointer)highlightRangeStart.CreateDynamicTextPointer(LogicalDirection.Forward),
(FixedTextPointer)highlightTransitionPosition.CreateDynamicTextPointer(LogicalDirection.Forward),
_highlights, fixedHighlightType, foreground, background);
}
}
ArrayList dirtyPages = new ArrayList();
IList ranges = args.Ranges;
// Find the dirty page
for (int i = 0; i < ranges.Count; i++)
{
TextSegment textSegment = (TextSegment)ranges[i];
int startPage = this.FixedContainer.GetPageNumber(textSegment.Start);
int endPage = this.FixedContainer.GetPageNumber(textSegment.End);
for (int count = startPage; count <= endPage; count ++)
{
if (dirtyPages.IndexOf(count) < 0)
{
dirtyPages.Add(count);
}
}
}
ICollection<FixedPage> newHighlightPages = _highlights.Keys as ICollection<FixedPage>;
//Also dirty the pages that had highlights before but not anymore
foreach (FixedPage page in oldHighlightPages)
{
if (!newHighlightPages.Contains(page))
{
int pageNo = GetIndexOfPage(page);
Debug.Assert(pageNo >= 0 && pageNo<PageCount);
if (pageNo >=0 && pageNo < PageCount && dirtyPages.IndexOf(pageNo) < 0)
{
dirtyPages.Add(pageNo);
}
}
}
dirtyPages.Sort();
foreach (int i in dirtyPages)
{
HighlightVisual hv = HighlightVisual.GetHighlightVisual(SyncGetPage(i, false /*forceReload*/));
if (hv != null)
{
hv.InvalidateHighlights();
}
}
}
//---------------------------------------
// IDP
//---------------------------------------
private object GetPageAsyncDelegate(object arg)
{
GetPageAsyncRequest asyncRequest = (GetPageAsyncRequest)arg;
PageContent pc = asyncRequest.PageContent;
DocumentsTrace.FixedFormat.IDF.Trace($"IDP.GetPageAsyncDelegate {Pages.IndexOf(pc)}");
// Initiate request for page if necessary
if (!_pendingPages.Contains(pc))
{
_pendingPages.Add(pc);
// Initiate an async loading of the page
pc.GetPageRootCompleted += new GetPageRootCompletedEventHandler(OnGetPageRootCompleted);
pc.GetPageRootAsync(false /*forceReload*/);
if (asyncRequest.Cancelled)
{
pc.GetPageRootAsyncCancel();
}
}
return null;
}
private void OnGetPageRootCompleted(object sender, GetPageRootCompletedEventArgs args)
{
DocumentsTrace.FixedFormat.IDF.Trace($"IDP.OnGetPageRootCompleted {Pages.IndexOf((PageContent)sender)}");
// Mark this page as no longer pending
PageContent pc = (PageContent)sender;
pc.GetPageRootCompleted -= new GetPageRootCompletedEventHandler(OnGetPageRootCompleted);
_pendingPages.Remove(pc);
// Notify all outstanding request for this particular page
ArrayList completedRequests = new ArrayList();
IEnumerator<KeyValuePair<Object, GetPageAsyncRequest>> ienum = _asyncOps.GetEnumerator();
try
{
while (ienum.MoveNext())
{
GetPageAsyncRequest asyncRequest = ienum.Current.Value;
// Process any outstanding request for this PageContent
if (asyncRequest.PageContent == pc)
{
completedRequests.Add(ienum.Current.Key);
DocumentPage result = DocumentPage.Missing;
if (!asyncRequest.Cancelled)
{
// Do synchronous measure since we have obtained the page
if (!args.Cancelled && (args.Error == null))
{
FixedPage c = (FixedPage)args.Result;
Size fixedSize = ComputePageSize(c);
// Measure / Arrange in GetVisual override of FixedDocumentPage, not here
result = new FixedDocumentPage(this, c, fixedSize, Pages.IndexOf(pc));
}
}
// this could throw
_NotifyGetPageAsyncCompleted(result, asyncRequest.PageNumber, args.Error, asyncRequest.Cancelled, asyncRequest.UserState);
}
}
}
finally
{
// Remove completed requests from current async ops list
foreach (Object userState in completedRequests)
{
_asyncOps.Remove(userState);
}
}
}
// Notify the caller of IDFAsync.MeasurePageAsync
private void _NotifyGetPageAsyncCompleted(DocumentPage page, int pageNumber, Exception error, bool cancelled, object userState)
{
DocumentsTrace.FixedFormat.IDF.Trace($"IDP._NotifyGetPageAsyncCompleted {page} {pageNumber} {error} {cancelled} {userState}");
_paginator.NotifyGetPageCompleted(new GetPageCompletedEventArgs(
page,
pageNumber,
error,
cancelled,
userState
));
}
#endregion Private Methods
//--------------------------------------------------------------------
//
// Private Properties
//
//---------------------------------------------------------------------
//--------------------------------------------------------------------
//
// Private Fields
//
//---------------------------------------------------------------------
#region Private Fields
private IDictionary<Object, GetPageAsyncRequest> _asyncOps;
private IList<PageContent> _pendingPages;
private PageContentCollection _pages;
private PageContent _partialPage; // the current partially loaded page.
private Dictionary<FixedPage, ArrayList> _highlights;
private double _pageWidth = 8.5 * 96.0d;
private double _pageHeight = 11 * 96.0d; // default page size
private FixedTextContainer _fixedTextContainer;
private RubberbandSelector _rubberbandSelector;
private bool _navigateAfterPagination = false ;
private string _navigateFragment;
private FixedDocumentPaginator _paginator;
private DocumentReference _documentReference;
private bool _hasExplicitStructure;
private const string _structureRelationshipName = "http://schemas.microsoft.com/xps/2005/06/documentstructure";
private const string _storyFragmentsRelationshipName = "http://schemas.microsoft.com/xps/2005/06/storyfragments";
private static readonly ContentType _storyFragmentsContentType = new ContentType("application/vnd.ms-package.xps-storyfragments+xml");
private static readonly ContentType _documentStructureContentType = new ContentType("application/vnd.ms-package.xps-documentstructure+xml");
// Caches the UIElement's DependencyObjectType
private static DependencyObjectType UIElementType = DependencyObjectType.FromSystemTypeInternal(typeof(UIElement));
#endregion Private Fields
//--------------------------------------------------------------------
//
// Nested Class
//
//---------------------------------------------------------------------
#region Nested Class
private class GetPageAsyncRequest
{
internal GetPageAsyncRequest(PageContent pageContent, int pageNumber, object userState)
{
PageContent = pageContent;
PageNumber = pageNumber;
UserState = userState;
Cancelled = false;
}
internal PageContent PageContent;
internal int PageNumber;
internal object UserState;
internal bool Cancelled;
}
#endregion Nested Class
}
//=====================================================================
//
// FixedDocument's implemenation of DocumentPage
//
internal sealed class FixedDocumentPage : DocumentPage, IServiceProvider
{
//--------------------------------------------------------------------
//
// Ctors
//
//---------------------------------------------------------------------
#region Ctors
internal FixedDocumentPage(FixedDocument panel, FixedPage page, Size fixedSize, int index) :
base(page, fixedSize, new Rect(fixedSize), new Rect(fixedSize))
{
Debug.Assert(panel != null && page != null);
_panel = panel;
_page = page;
_index = index;
}
#endregion Ctors;
//--------------------------------------------------------------------
//
// Public Methods
//
//---------------------------------------------------------------------
#region IServiceProvider
/// <summary>
/// Returns service objects associated with this control.
/// </summary>
/// <remarks>
/// FixedDocument currently supports TextView.
/// </remarks>
/// <param name="serviceType">
/// Specifies the type of service object to get.
/// </param>
object IServiceProvider.GetService(Type serviceType)
{
ArgumentNullException.ThrowIfNull(serviceType);
if (serviceType == typeof(ITextView))
{
return this.TextView;
}
return null;
}
#endregion IServiceProvider
//--------------------------------------------------------------------
//
// Public Methods
//
//---------------------------------------------------------------------
//--------------------------------------------------------------------
//
// Public Properties
//
//---------------------------------------------------------------------
public override Visual Visual
{
get
{
if (!_layedOut)
{
_layedOut = true;
UIElement e;
if ((e = ((object)base.Visual) as UIElement)!=null)
{
e.Measure(base.Size);
e.Arrange(new Rect(base.Size));
}
}
return base.Visual;
}
}
//--------------------------------------------------------------------
//
// Internal Properties
//
//---------------------------------------------------------------------
#region Internal Properties
internal ContentPosition ContentPosition
{
get
{
FlowPosition flowPosition = _panel.FixedContainer.FixedTextBuilder.GetPageStartFlowPosition(_index);
return new FixedTextPointer(true, LogicalDirection.Forward, flowPosition);
}
}
internal FixedPage FixedPage
{
get
{
return this._page;
}
}
internal int PageIndex
{
get
{
return this._panel.GetIndexOfPage(this._page);
}
}
internal FixedTextView TextView
{
get
{
if (_textView == null)
{
_textView = new FixedTextView(this);
}
return _textView;
}
}
internal FixedDocument Owner
{
get
{
return _panel;
}
}
internal FixedTextContainer TextContainer
{
get
{
return this._panel.FixedContainer;
}
}
#endregion Internal Properties
//--------------------------------------------------------------------
//
// Internal Event
//
//---------------------------------------------------------------------
//--------------------------------------------------------------------
//
// Private Fields
//
//---------------------------------------------------------------------
#region Private Fields
private readonly FixedDocument _panel;
private readonly FixedPage _page;
private readonly int _index;
private bool _layedOut;
// Text OM
private FixedTextView _textView;
#endregion Private Fields
}
}
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