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//
// Authors:
// Marek Habersack <grendel@twistedcode.net>
//
// (C) 2010 Novell, Inc (http://novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Web.UI;
namespace System.Web.UI.WebControls
{
sealed class StyleBlock : Control
{
List <NamedCssStyleCollection> cssStyles;
Dictionary <string, NamedCssStyleCollection> cssStyleIndex;
string stylePrefix;
List <NamedCssStyleCollection> CssStyles {
get {
if (cssStyles == null) {
cssStyles = new List <NamedCssStyleCollection> ();
cssStyleIndex = new Dictionary <string, NamedCssStyleCollection> (StringComparer.Ordinal);
}
return cssStyles;
}
}
public StyleBlock (string stylePrefix)
{
if (String.IsNullOrEmpty (stylePrefix))
throw new ArgumentNullException ("stylePrefix");
this.stylePrefix = stylePrefix;
}
public NamedCssStyleCollection RegisterStyle (string name = null)
{
if (name == null)
name = String.Empty;
return GetStyle (name);
}
public NamedCssStyleCollection RegisterStyle (Style style, string name = null)
{
if (style == null)
throw new ArgumentNullException ("style");
if (name == null)
name = String.Empty;
NamedCssStyleCollection cssStyle = GetStyle (name);
cssStyle.CopyFrom (style.GetStyleAttributes (null));
return cssStyle;
}
public NamedCssStyleCollection RegisterStyle (HtmlTextWriterStyle key, string value, string styleName = null)
{
if (styleName == null)
styleName = String.Empty;
NamedCssStyleCollection style = GetStyle (styleName);
style.Add (key, value);
return style;
}
NamedCssStyleCollection GetStyle (string name)
{
List <NamedCssStyleCollection> cssStyles = CssStyles;
NamedCssStyleCollection style;
if (!cssStyleIndex.TryGetValue (name, out style)) {
style = new NamedCssStyleCollection (name);
cssStyleIndex.Add (name, style);
cssStyles.Add (style);
}
if (style == null)
throw new InvalidOperationException (String.Format ("Internal error. Stylesheet for style {0} is null.", name));
return style;
}
protected internal override void Render (HtmlTextWriter writer)
{
if (cssStyles == null || cssStyles.Count == 0)
return;
writer.AddAttribute (HtmlTextWriterAttribute.Type, "text/css");
writer.RenderBeginTag (HtmlTextWriterTag.Style);
writer.WriteLine ("/* <![CDATA[ */");
string name, value;
foreach (var css in cssStyles) {
value = css.Collection.Value;
if (String.IsNullOrEmpty (value))
continue;
name = css.Name;
if (name != String.Empty)
name = name + " ";
writer.WriteLine ("#{0} {1}{{ {2} }}", stylePrefix, name, value);
}
writer.WriteLine ("/* ]]> */");
writer.RenderEndTag (); // </style>
}
}
}
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