Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Mobile/UI/MobileControls/Adapters/ChtmlFormAdapter.cs

@@ -0,0 +1,154 @@
+//------------------------------------------------------------------------------
+// <copyright file="ChtmlFormAdapter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+using System.Globalization;
+using System.Security.Permissions;
+
+#if COMPILING_FOR_SHIPPED_SOURCE
+namespace System.Web.UI.MobileControls.ShippedAdapterSource
+#else
+namespace System.Web.UI.MobileControls.Adapters
+#endif
+
+{
+    /*
+     * ChtmlFormAdapter class.
+     *
+     * Copyright (c) 2000 Microsoft Corporation
+     */
+    /// <include file='doc\ChtmlFormAdapter.uex' path='docs/doc[@for="ChtmlFormAdapter"]/*' />
+    [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 ChtmlFormAdapter : HtmlFormAdapter
+    {
+        private static readonly String _contentTypeMetaTag = "<meta http-equiv=\"Content-Type\" content=\"{0}; charset={1}\">\r\n";
+        
+        /// <include file='doc\ChtmlFormAdapter.uex' path='docs/doc[@for="ChtmlFormAdapter.ShouldRenderFormTag"]/*' />
+        protected override bool ShouldRenderFormTag()
+        {
+            if (!Device.RequiresOutputOptimization || Control.PageCount > 1)
+            {
+                return true;
+            }
+
+            return IsFormTagNeeded(Control);
+        }
+
+        // Recursive method to check if there is any descendant control
+        // requires the form tag.  For unknown cases, the method returns true
+        // in case the unknown rendering requires the form tag.
+        private bool IsFormTagNeeded(Control control)
+        {
+            // Check itself first
+            if (!control.Visible)
+            {
+                return false;
+            }
+
+            MobileControl mobileControl = control as MobileControl;
+            if (mobileControl != null)
+            {
+                // Since we don't have control over what content is included
+                // in the template, to be safe we just generate the form tag.
+                if (mobileControl.IsTemplated)
+                {
+                    return true;
+                }
+
+                HtmlControlAdapter adapter = mobileControl.Adapter as HtmlControlAdapter;
+                if (adapter != null && adapter.RequiresFormTag)
+                {
+                    return true;
+                }
+            }
+            else if (!(control is UserControl) &&
+                     !(control is LiteralControl))
+            {
+                // UserControl simply acts as a container, so the checking
+                // should be delegated to its children below.
+                // LiteralControl is a plain text control.  Also, it is
+                // generated for the spaces in between mobile control tags so
+                // we don't want to consider it as a form required control.
+                // For other cases, we should generate form tag as we don't
+                // know the content that will be generated.
+                return true;
+            }
+
+            // No problem with the current control so far, now recursively
+            // check its children.
+            if (control.HasControls())
+            {
+                foreach (Control child in control.Controls)
+                {
+                    if (IsFormTagNeeded(child))
+                    {
+                        // This is to get out of recursive loop without
+                        // further checking on other controls.
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        /// <include file='doc\ChtmlFormAdapter.uex' path='docs/doc[@for="ChtmlFormAdapter.RenderExtraHeadElements"]/*' />
+        protected override bool RenderExtraHeadElements(HtmlMobileTextWriter writer)
+        {
+            bool result = false;
+            
+            String metaTagName = Device.RequiredMetaTagNameValue;
+            if (metaTagName != null)
+            {
+                if (writer != null)
+                {
+                    writer.Write("<meta NAME=\"" + metaTagName + "\" CONTENT=\"True\">\r\n");
+                }
+                result = true;
+            }
+
+            String charset = Page.Response.Charset;
+            if (Device.RequiresContentTypeMetaTag &&
+                charset != null && charset.Length > 0)
+            {
+                if (writer != null)
+                {
+                    writer.Write(String.Format(CultureInfo.InvariantCulture, _contentTypeMetaTag, Device.PreferredRenderingMime, charset));
+                }
+                result = true;
+            }
+
+            return result;
+        }
+
+        /// <include file='doc\ChtmlFormAdapter.uex' path='docs/doc[@for="ChtmlFormAdapter.RenderPagerTag"]/*' />
+        protected internal override void RenderPagerTag(
+            HtmlMobileTextWriter writer,
+            int pageToNavigate,
+            String text)
+        {
+            writer.EnterLayout(Style);
+            writer.EnterFormat(Style);
+            writer.WriteBeginTag("input");
+
+            // Specially encode the page number with the control id.
+            // The corresponding code that handles postback should know how
+            // to extract the page number correctly.
+            writer.Write(" name=\"");
+            writer.Write(Control.UniqueID);
+            writer.Write(Constants.PagePrefix);
+            writer.Write(pageToNavigate.ToString(CultureInfo.InvariantCulture));
+            writer.Write("\"");
+
+            writer.WriteAttribute("type", "submit");
+            writer.WriteAttribute("value", text, true);
+            writer.Write("/>");
+            writer.ExitFormat(Style);
+            writer.ExitLayout(Style);
+        }
+    }
+}