285 lines
9.9 KiB
C#
285 lines
9.9 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="Control.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.Adapters {
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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Globalization;
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using System.IO;
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using System.Security.Permissions;
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using System.Web.Security.Cryptography;
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using System.Web.UI.WebControls;
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using System.Web.Util;
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public abstract class PageAdapter : ControlAdapter {
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private IDictionary _radioButtonGroups = null;
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public virtual StringCollection CacheVaryByHeaders {
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get {
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return null;
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}
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}
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public virtual StringCollection CacheVaryByParams {
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get {
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return null;
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}
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}
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/// <devdoc>
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/// <para>Exposes the page ClientState string to the adapters</para>
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/// </devdoc>
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protected string ClientState {
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get {
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if (Page != null) {
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return Page.ClientState;
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}
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return null;
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}
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}
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/// <devdoc>
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/// The id separator used for control UniqueID/ClientID.
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/// </devdoc>
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internal virtual char IdSeparator {
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get {
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return Control.ID_SEPARATOR;
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}
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}
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internal String QueryString {
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get {
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string queryString = Page.ClientQueryString;
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if (Page.Request.Browser.RequiresUniqueFilePathSuffix) {
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if (!String.IsNullOrEmpty(queryString)) {
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queryString = String.Concat(queryString, "&");
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}
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queryString = String.Concat(queryString, Page.UniqueFilePathSuffix);
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}
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return queryString;
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}
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual NameValueCollection DeterminePostBackMode() {
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Debug.Assert(Control != null);
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if(Control != null) {
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return Control.Page.DeterminePostBackMode();
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}
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return null;
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}
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/// <summary>
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/// Returns an unvalidated name/value collection of the postback variables. This method will
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/// only be called if DeterminePostBackMode() returns a non-null value.
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/// This method exists to support the granular request validation feature added in .NET 4.5
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/// </summary>
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/// <returns>An unvalidated name/value collection of the postback variables.</returns>
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public virtual NameValueCollection DeterminePostBackModeUnvalidated() {
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if (Control != null) {
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return Control.Page.DeterminePostBackModeUnvalidated();
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}
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return null;
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual ICollection GetRadioButtonsByGroup(string groupName) {
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if (_radioButtonGroups == null) {
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return null;
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}
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return (ICollection)_radioButtonGroups[groupName];
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}
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protected internal virtual string GetPostBackFormReference(string formId) {
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return "document.forms['" + formId + "']";
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}
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public virtual PageStatePersister GetStatePersister() {
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return new HiddenFieldPageStatePersister(Page);
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void RegisterRadioButton(RadioButton radioButton) {
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string groupName = radioButton.GroupName;
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if (String.IsNullOrEmpty(groupName))
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return;
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ArrayList group = null;
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if (_radioButtonGroups == null) {
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_radioButtonGroups = new ListDictionary();
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}
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if (_radioButtonGroups.Contains(groupName)) {
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group = (ArrayList)_radioButtonGroups[groupName];
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}
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else {
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group = new ArrayList();
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_radioButtonGroups[groupName] = group;
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}
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group.Add(radioButton);
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void RenderBeginHyperlink(HtmlTextWriter writer, string targetUrl, bool encodeUrl, string softkeyLabel) {
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RenderBeginHyperlink(writer, targetUrl, encodeUrl, softkeyLabel, null /* accessKey */);
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void RenderBeginHyperlink(HtmlTextWriter writer, string targetUrl, bool encodeUrl, string softkeyLabel, string accessKey) {
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String url;
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// Valid values are null, String.Empty, and single character strings
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if ((accessKey != null) && (accessKey.Length > 1)) {
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throw new ArgumentOutOfRangeException("accessKey");
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}
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if (encodeUrl) {
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url = HttpUtility.HtmlAttributeEncode(targetUrl);
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}
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else {
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url = targetUrl;
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}
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writer.AddAttribute("href", url);
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if (!String.IsNullOrEmpty(accessKey)) {
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writer.AddAttribute("accessKey", accessKey);
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}
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writer.RenderBeginTag("a");
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}
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/// <devdoc>
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/// <para>[To be supplied.]</para>
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/// </devdoc>
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public virtual void RenderEndHyperlink(HtmlTextWriter writer) {
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writer.WriteEndTag("a");
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}
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public virtual void RenderPostBackEvent(HtmlTextWriter writer, string target, string argument, string softkeyLabel, string text) {
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RenderPostBackEvent(writer, target, argument, softkeyLabel, text, null /*postUrl */, null /* accesskey */);
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}
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/// <devdoc>
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/// <para>Renders a client widget corresponding to a postback event, for example a wml do or a post link. Note that this
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/// widget may not submit the form data, e.g. scriptless html where this renders a link. </para>
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/// </devdoc>
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public virtual void RenderPostBackEvent(HtmlTextWriter writer, string target, string argument, string softkeyLabel, string text, string postUrl, string accessKey) {
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RenderPostBackEvent(writer, target, argument, softkeyLabel, text, postUrl, accessKey, false /* encode */);
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}
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/// <devdoc>
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/// <para>Renders a client widget corresponding to a postback event, for example a wml do or a post link. Note that this
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/// widget may not submit the form data, e.g. scriptless html where this renders a link. </para>
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/// </devdoc>
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protected void RenderPostBackEvent(HtmlTextWriter writer, string target, string argument, string softkeyLabel, string text, string postUrl, string accessKey, bool encode) {
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// Default: render postback event as scriptless anchor (works for all markups). Override for specific markups.
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string amp = encode ? "&" : "&";
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bool isCrossPagePostBack = !String.IsNullOrEmpty(postUrl);
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writer.WriteBeginTag("a");
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writer.Write(" href=\"");
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string url = null;
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if (!isCrossPagePostBack) {
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if ((String)Browser["requiresAbsolutePostbackUrl"] == "true") {
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url = Page.Response.ApplyAppPathModifier(Page.Request.CurrentExecutionFilePath);
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}
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else {
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url = Page.RelativeFilePath;
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}
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}
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else {
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url = postUrl;
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Page.ContainsCrossPagePost = true;
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}
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writer.WriteEncodedUrl(url);
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writer.Write("?");
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string clientState = ClientState;
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if (clientState != null)
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{
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ICollection chunks = Page.DecomposeViewStateIntoChunks();
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// Default chunk count is 1
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if (chunks.Count > 1) {
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writer.Write(Page.ViewStateFieldCountID + "=" + chunks.Count + amp);
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}
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int count = 0;
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foreach (String state in chunks) {
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writer.Write(Page.ViewStateFieldPrefixID);
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if (count > 0) writer.Write(count.ToString(CultureInfo.CurrentCulture));
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writer.Write("=" + HttpUtility.UrlEncode(state));
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writer.Write(amp);
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++count;
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}
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}
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if (isCrossPagePostBack) {
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writer.Write(Page.previousPageID);
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writer.Write("=" + Page.EncryptString(Page.Request.CurrentExecutionFilePath, Purpose.WebForms_Page_PreviousPageID));
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writer.Write(amp);
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}
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writer.Write("__EVENTTARGET=" + HttpUtility.UrlEncode(target));
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writer.Write(amp);
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writer.Write("__EVENTARGUMENT=" + HttpUtility.UrlEncode(argument));
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//
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string queryStringText = QueryString;
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if (!String.IsNullOrEmpty(queryStringText)) {
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writer.Write(amp);
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writer.Write(queryStringText);
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}
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writer.Write("\"");
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if (!String.IsNullOrEmpty(accessKey)) {
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writer.WriteAttribute("accessKey", accessKey);
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}
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writer.Write(">");
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writer.Write(text);
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writer.WriteEndTag("a");
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}
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/// <devdoc>
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/// Transforms text for the target device. The default transformation is the identity transformation,
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/// which does not change the text.
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/// </devdoc>
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public virtual string TransformText(string text) {
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return text;
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}
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}
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}
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