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