Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Adapters / HtmlPageAdapter.cs / 1305376 / HtmlPageAdapter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System.Collections; using System.Collections.Specialized; using System.Diagnostics; using System.IO; using System.Text; using System.Web.Mobile; using System.Web.UI.MobileControls.Adapters; using System.Security.Permissions; #if COMPILING_FOR_SHIPPED_SOURCE namespace System.Web.UI.MobileControls.ShippedAdapterSource #else namespace System.Web.UI.MobileControls.Adapters #endif { /* * HtmlPageAdapter class. * * Copyright (c) 2000 Microsoft Corporation */ ///[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")] public class HtmlPageAdapter : HtmlControlAdapter, IPageAdapter { private IList _renderableForms = null; private int _optimumPageWeight = 0; private const int DefaultPageWeight = 4000; private readonly int _defaultPageWeight; private const String _postedFromOtherFile = "."; private IDictionary _cookielessDataDictionary = null; /// public HtmlPageAdapter() : this(DefaultPageWeight) { } /// protected internal HtmlPageAdapter(int defaultPageWeight) { _defaultPageWeight = defaultPageWeight; SetPreferredEncodings(HttpContext.Current); } /// public virtual int OptimumPageWeight { get { if (_optimumPageWeight == 0) { _optimumPageWeight = CalculateOptimumPageWeight(_defaultPageWeight); } return _optimumPageWeight; } } /////////////////////////////////////////////////////////////////////////// // Static method used for determining if device should use // this adapter /////////////////////////////////////////////////////////////////////////// /// public static bool DeviceQualifies(HttpContext context) { String type = ((MobileCapabilities)context.Request.Browser).PreferredRenderingType; bool javascriptSupported = context.Request.Browser.JavaScript; bool qualifies = (type == MobileCapabilities.PreferredRenderingTypeHtml32) && javascriptSupported; return qualifies; } /////////////////////////////////////////////////////////////////////////// // IControlAdapter implementation /////////////////////////////////////////////////////////////////////////// /// public override void Render(HtmlMobileTextWriter writer) { writer.BeginResponse(); if (RequiresPragmaNoCacheHeader()) { Page.Response.AppendHeader("Pragma", "no-cache"); } if (writer.SupportsMultiPart) { // -1 means it doesn't care about forms' total weight _renderableForms = Page.ActiveForm.GetLinkedForms(-1); Debug.Assert(_renderableForms != null, "_renderableForms is null"); foreach (Form form in _renderableForms) { RenderForm(writer, form); } } else { RenderForm(writer, Page.ActiveForm); } writer.EndResponse(); } private bool RequiresPragmaNoCacheHeader() { // We need to Assert ASP.NET Low permission because Request.ServerVariables // requires it. (new AspNetHostingPermission(AspNetHostingPermissionLevel.Low)).Assert(); String protocol = Page.Request.ServerVariables["SERVER_PROTOCOL"]; return (protocol == "HTTP/1.0"); } /// public virtual void RenderForm(HtmlMobileTextWriter writer, Form form) { writer.BeginFile(GetFormUrl(form), "text/html", Page.Response.Charset); writer.WriteFullBeginTag("html"); form.RenderControl(writer); if (Device.RequiresDBCSCharacter) { // Insert a comment with a space writer.Write(""); } writer.WriteEndTag("html"); writer.EndFile(); } /// public virtual bool IsFormRendered(Form form) { Debug.Assert(_renderableForms != null, "_renderableForms is null"); return _renderableForms.Contains(form); } /// public String GetFormUrl(Form form) { if (form == Page.ActiveForm) { return Page.Request.Url.ToString(); } else { return form.ClientID + ".html"; } } /// public virtual void RenderPostBackEvent(HtmlMobileTextWriter writer, String target, String argument) { writer.Write("javascript:__doPostBack('"); writer.Write(target); writer.Write("','"); writer.Write(argument); writer.Write("')"); } /// public virtual void RenderUrlPostBackEvent(HtmlMobileTextWriter writer, String target, String argument) { writer.WriteEncodedUrl(Page.RelativeFilePath); writer.Write("?"); // Encode ViewStateID=.....&__ET=controlid&__EA=value in URL // Note: the encoding needs to be agreed with the page // adapter which handles the post back info String pageState = Page.ClientViewState; if (pageState != null) { writer.WriteUrlParameter(MobilePage.ViewStateID, pageState); writer.Write("&"); } writer.WriteUrlParameter(EventSourceKey, target); writer.Write("&"); writer.WriteUrlParameter(EventArgumentKey, argument); RenderHiddenVariablesInUrl(writer); // Unique file path suffix is used for identify if query // string text is present. Corresponding code needs to agree // on this. Even if the query string is empty, we still need // to output the suffix to indicate this. (this corresponds // to the code that handles the postback) writer.Write('&'); writer.Write(Constants.UniqueFilePathSuffixVariable); String queryStringText = Page.QueryStringText; if (queryStringText != null && queryStringText.Length > 0) { writer.Write('&'); writer.Write(queryStringText); } } /// protected virtual String EventSourceKey { get { return MobilePage.HiddenPostEventSourceId; } } /// protected virtual String EventArgumentKey { get { return MobilePage.HiddenPostEventArgumentId; } } /// protected void RenderHiddenVariables(HtmlMobileTextWriter writer) { if (Page.HasHiddenVariables()) { String hiddenVariablePrefix = MobilePage.HiddenVariablePrefix; foreach (DictionaryEntry entry in Page.HiddenVariables) { if (entry.Value != null) { writer.WriteHiddenField(hiddenVariablePrefix + (String)entry.Key, (String)entry.Value); } } } } private void RenderHiddenVariablesInUrl(HtmlMobileTextWriter writer) { if (Page.HasHiddenVariables()) { String hiddenVariablePrefix = MobilePage.HiddenVariablePrefix; foreach (DictionaryEntry entry in Page.HiddenVariables) { writer.Write("&"); writer.WriteUrlParameter(hiddenVariablePrefix + (String)entry.Key, (String)entry.Value); } } } /// public virtual void RenderPostBackHeader(HtmlMobileTextWriter writer, Form form) { bool postBack = form.Action.Length == 0; RenderPageState(writer); writer.WriteHiddenField(EventSourceKey, postBack ? "" : _postedFromOtherFile); writer.WriteHiddenField(EventArgumentKey, ""); RenderHiddenVariables(writer); writer.Write("\r\n"); } /////////////////////////////////////////////////////////////////////////// // IPageAdapter implementation /////////////////////////////////////////////////////////////////////////// private MobilePage _page; /// public override MobilePage Page { get { return _page; } set { _page = value; } } /// public IDictionary CookielessDataDictionary { get { return _cookielessDataDictionary; } set { _cookielessDataDictionary = value; } } private bool _persistCookielessData = true; /// public bool PersistCookielessData { get { return _persistCookielessData; } set { _persistCookielessData = value; } } /// public virtual HtmlTextWriter CreateTextWriter(TextWriter writer) { return new HtmlMobileTextWriter(writer, Device); } /// public virtual NameValueCollection DeterminePostBackMode( HttpRequest request, String postEventSourceID, String postEventArgumentID, NameValueCollection baseCollection) { if (baseCollection != null && baseCollection[EventSourceKey] == _postedFromOtherFile) { return null; } return baseCollection; } /// public virtual IList CacheVaryByHeaders { get { return null; } } /// public virtual bool HandleError(Exception e, HtmlTextWriter writer) { return false; } internal void RenderPageState(HtmlMobileTextWriter writer) { String viewState = Page.ClientViewState; if (viewState != null) { writer.WriteHiddenField(MobilePage.ViewStateID, viewState); } } /// public virtual bool HandlePagePostBackEvent(String eventSource, String eventArgument) { return false; } internal static void SetPreferredEncodings(HttpContext context) { // context can be null when in design mode if (context == null) { return; } //handle preferred response and request encoding here MobileCapabilities caps = (MobileCapabilities)context.Request.Browser; if(caps != null) { string preferredResponseEncoding = (string)caps["preferredResponseEncoding"]; string preferredRequestEncoding = (string)caps["preferredRequestEncoding"]; if(preferredResponseEncoding != null && preferredResponseEncoding.Length > 0) { context.Response.ContentEncoding = Encoding.GetEncoding(preferredResponseEncoding); } if(preferredRequestEncoding != null && preferredRequestEncoding.Length > 0) { context.Request.ContentEncoding = Encoding.GetEncoding(preferredRequestEncoding); } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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