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//------------------------------------------------------------------------------
// <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);
}
}
}
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