DesignerTextBoxAdapter.cs source code in C# .NET

                        
Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Design / Adapters / DesignerTextBoxAdapter.cs / 1305376 / DesignerTextBoxAdapter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System.Globalization; 
using System.IO; 
using System.Web.Mobile;
using System.Web.UI.MobileControls; 
using System.Web.UI.MobileControls.Adapters;

namespace System.Web.UI.Design.MobileControls.Adapters
{ 
    [
        System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, 
        Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode) 
    ]
    [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.")] 
    internal class DesignerTextBoxAdapter : HtmlTextBoxAdapter
    {
        // required width may differ a little bit from actual exact pixel value
        private const int SAFETY_MARGIN = 12; 
        // size after which we simply assume the control is too large to fit
        // into its container. 
        private const int LARGESIZE_THRESHOLD = 100; 

        public override MobileCapabilities Device 
        {
            get
            {
                return DesignerCapabilities.Instance; 
            }
        } 
 
        public override void Render(HtmlMobileTextWriter writer)
        { 
            // Invalid text writers are not supported in this Adapter.
            if (!(writer is DesignerTextWriter))
            {
                return; 
            }
 
            byte templateStatus; 
            bool pwd = Control.Password;
            int size = Control.Size; 
            int fittingSize;

            int maxWidth = DesignerAdapterUtil.GetMaxWidthToFit(Control, out templateStatus);
 
            if (maxWidth == 0)
            { 
                if (templateStatus == DesignerAdapterUtil.CONTROL_IN_TEMPLATE_NONEDIT) 
                {
                    maxWidth = DesignerAdapterUtil.CONTROL_MAX_WIDTH_IN_TEMPLATE; 
                }
                else if (DesignerAdapterUtil.InMobileUserControl(Control))
                {
                    maxWidth = Constants.ControlMaxsizeAtToplevel; 
                }
            } 
 
            if (maxWidth == 0)
            { 
                return;
            }

            bool restoreEmptyFontName = false; 
            if (String.IsNullOrEmpty((String) Style[Style.FontNameKey, true]))
            { 
                // MSHTMLHostUtil is using another font by default. 
                // Setting the font name to the one that is actually
                // used by default for the desig-time rendering 
                // assures that the requiredWidth returned by
                // MSHTMLHostUtil.GetHtmlFragmentWidth is accurate.
                Style[Style.FontNameKey] = "Arial";
                restoreEmptyFontName = true; 
            }
 
            int requiredWidth = 0; 
            DesignerTextWriter tw;
            tw = new DesignerTextWriter(false); 
            tw.EnterLayout(Style);
            String enterLayout = tw.ToString();

            tw = new DesignerTextWriter(false); 
            tw.ExitLayout(Style);
            String exitLayout = tw.ToString(); 
 
            tw = new DesignerTextWriter(false);
            tw.WriteBeginTag("input"); 
            tw.WriteStyleAttribute(Style, null);
            if (size > 0)
            {
                tw.WriteAttribute("size", "{0}"); 
            }
            tw.Write("/>"); 
            String htmlFragment = tw.ToString(); 

            MSHTMLHostUtil.ApplyStyle(enterLayout, exitLayout, null); 

            if (size < LARGESIZE_THRESHOLD)
            {
                requiredWidth = MSHTMLHostUtil.GetHtmlFragmentWidth(size > 0 ? String.Format(CultureInfo.InvariantCulture, htmlFragment, size) : htmlFragment); 
            }
 
            if (requiredWidth + SAFETY_MARGIN > maxWidth || size >= LARGESIZE_THRESHOLD) 
            {
                if (size == 0) 
                {
                    tw = new DesignerTextWriter(false);
                    tw.WriteBeginTag("input");
                    tw.WriteStyleAttribute(Style, null); 
                    tw.WriteAttribute("size", "{0}");
                    tw.Write("/>"); 
                    htmlFragment = tw.ToString(); 
                }
                fittingSize = 0; 
                do
                {
                    fittingSize++;
                    requiredWidth = MSHTMLHostUtil.GetHtmlFragmentWidth(String.Format(CultureInfo.InvariantCulture, htmlFragment, fittingSize)); 
                }
                while (requiredWidth + SAFETY_MARGIN <= maxWidth); 
 
                if (fittingSize > 1)
                { 
                    fittingSize--;
                }
            }
            else 
            {
                fittingSize = size; 
            } 

            if (restoreEmptyFontName) 
            {
                Style[Style.FontNameKey] = String.Empty;
            }
 
            Alignment alignment = (Alignment) Style[Style.AlignmentKey, true];
            String width = DesignerAdapterUtil.GetWidth(Control); 
 
            writer.Write("
"); 

            ((DesignerTextWriter)writer).EnterZeroFontSizeTag(); 
            writer.EnterLayout(Style); 

            writer.WriteBeginTag("input"); 
            ((DesignerTextWriter)writer).WriteStyleAttribute(Style, null);
            if (!String.IsNullOrEmpty(Control.Text))
            {
                writer.Write(" value=\""); 
                writer.WriteText(Control.Text, true);
                writer.Write("\" "); 
            } 
            if (fittingSize > 0)
            { 
                writer.WriteAttribute("size", fittingSize.ToString(CultureInfo.InvariantCulture));
            }
            if (pwd)
            { 
                writer.WriteAttribute("type", "password");
            } 
            writer.Write("/>"); 

            writer.ExitLayout(Style); 
            ((DesignerTextWriter)writer).ExitZeroFontSizeTag();
            writer.Write("
");
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

                        

                        
                        

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