Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / MS / Internal / Utility / BindUriHelper.cs / 4 / BindUriHelper.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2001 // // File: BindUriHelper.cs // // Description: BindUriHelper class. Allows bindToObject, bindToStream // // History: 04-13-01 - [....] - created //----------------------------------------------------------------------------- using System; using System.IO; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Text; using MS.Win32; using System.Security.Permissions; #if PRESENTATIONFRAMEWORK using System.Windows; using System.Windows.Navigation; using System.Windows.Media; using MS.Internal.PresentationFramework; using MS.Internal.AppModel; using System.Windows.Controls; using MS.Internal ; using System.Security; using System.IO.Packaging; using System.Reflection; using MS.Internal.Utility; using System.Net; // In order to avoid generating warnings about unknown message numbers and // unknown pragmas when compiling your C# source code with the actual C# compiler, // you need to disable warnings 1634 and 1691. (Presharp Documentation) #pragma warning disable 1634, 1691 namespace MS.Internal.Utility { // A BindUriHelper class // See also WpfWebRequestHelper. internal static partial class BindUriHelper { private const string PLACEBOURI = "http://microsoft.com/"; static private Uri placeboBase = new Uri(PLACEBOURI); private const string FRAGMENTMARKER = "#"; static internal Uri GetResolvedUri(Uri originalUri) { return GetResolvedUri(null, originalUri); } ////// /// ////// Relative Uri resolution logic /// /// if baseUriString != "" /// { /// if (baseUriString is absolute uri) /// { /// determine uriToNavigate as baseUriString + inputUri /// } /// else /// { /// determine uri to navigate wrt application's base uri + baseUriString + inputUri /// } /// } /// else /// { /// Get the element's NavigationService /// if(NavigationService.CurrentSource is absolute uri) /// { /// determine uriToNavigate as NavigationService.CurrentSource + inputUri /// } /// else // this will be more common /// { /// determine uriToNavigate wrt application's base uri (pack://application,,,/) + NavigationService.CurrentSource + inputUri /// } /// /// /// If no ns in tree, resolve against the application's base /// } /// /// /// /// ///static internal Uri GetUriToNavigate(DependencyObject element, Uri baseUri, Uri inputUri) { Uri uriToNavigate = inputUri; if ((inputUri == null) || (inputUri.IsAbsoluteUri == true)) { return uriToNavigate; } // BaseUri doesn't contain the last part of the path: filename, // so when the inputUri is fragment we cannot resolve with BaseUri, instead // we should resolve with the element's NavigationService's CurrentSource. if (StartWithFragment(inputUri)) { baseUri = null; } if (baseUri != null) { if (baseUri.IsAbsoluteUri == false) { uriToNavigate = GetResolvedUri(BindUriHelper.GetResolvedUri(null, baseUri), inputUri); } else { uriToNavigate = GetResolvedUri(baseUri, inputUri); } } else // we're in here when baseUri is not set i.e. it's null { Uri currentSource = null; // if the it is an INavigator (Frame, NavWin), we should use its CurrentSource property. // Otherwise we need to get NavigationService of the container that this element is hosted in, // and use its CurrentSource. if (element != null) { INavigator navigator = element as INavigator; if (navigator != null) { currentSource = navigator.CurrentSource; } else { NavigationService ns = null; ns = element.GetValue(NavigationService.NavigationServiceProperty) as NavigationService; currentSource = (ns == null) ? null : ns.CurrentSource; } } if (currentSource != null) { if (currentSource.IsAbsoluteUri) { uriToNavigate = GetResolvedUri(currentSource, inputUri); } else { uriToNavigate = GetResolvedUri(GetResolvedUri(null, currentSource), inputUri); } } else { // // For now we resolve to Application's base uriToNavigate = BindUriHelper.GetResolvedUri(null, inputUri); } } return uriToNavigate; } static internal bool StartWithFragment(Uri uri) { return uri.OriginalString.StartsWith(FRAGMENTMARKER, StringComparison.Ordinal); } // Return Fragment string for a given uri without the leading # static internal string GetFragment(Uri uri) { Uri workuri = uri; string fragment = String.Empty; string frag; if (uri.IsAbsoluteUri == false) { // this is a relative uri, and Fragement() doesn't work with relative uris. The base uri is completley irrelevant // here and will never affect the returned fragment, but the method requires something to be there. Therefore, // we will use "http://microsoft.com" as a convenient substitute. workuri = new Uri(placeboBase, uri); } frag = workuri.Fragment; if (frag != null && frag.Length > 0) { // take off the pound fragment = frag.Substring(1); } return fragment; } // In NavigationService we do not want to show users pack://application,,,/ with the // Source property or any event arguments. static internal Uri GetUriRelativeToPackAppBase(Uri original) { if (original == null) { return null; } Uri resolved = GetResolvedUri(original); Uri packUri = BaseUriHelper.PackAppBaseUri; Uri relative = packUri.MakeRelativeUri(resolved); return relative; } static internal bool IsXamlMimeType(ContentType mimeType) { if (MimeTypeMapper.XamlMime.AreTypeAndSubTypeEqual(mimeType) || MimeTypeMapper.FixedDocumentSequenceMime.AreTypeAndSubTypeEqual(mimeType) || MimeTypeMapper.FixedDocumentMime.AreTypeAndSubTypeEqual(mimeType) || MimeTypeMapper.FixedPageMime.AreTypeAndSubTypeEqual(mimeType)) { return true; } return false; } } } #endif // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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