2 // System.Web.UI.HtmlControls.HtmlHead
5 // Lluis Sanchez Gual (lluis@novell.com)
7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.ComponentModel;
32 using System.Collections;
33 using System.Security.Permissions;
34 using System.Web.UI.WebControls;
36 namespace System.Web.UI.HtmlControls
38 // CAS - no InheritanceDemand here as the class is sealed
39 [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
41 [ControlBuilder (typeof(HtmlHeadBuilder))]
42 public sealed class HtmlHead: HtmlGenericControl, IPageHeader, IParserAccessor
46 ArrayList styleSheets;
47 StyleSheetBag styleSheet;
49 public HtmlHead(): base("head") {}
51 public HtmlHead (string tag) : base (tag)
55 protected internal override void OnInit (EventArgs e)
57 Page.SetHeader (this);
60 protected internal override void RenderChildren (HtmlTextWriter writer)
62 base.RenderChildren (writer);
63 if (metadata != null) {
64 foreach (DictionaryEntry entry in metadata) {
65 writer.AddAttribute ("name", entry.Key.ToString ());
66 writer.AddAttribute ("content", entry.Value.ToString ());
67 writer.RenderBeginTag (HtmlTextWriterTag.Meta);
68 writer.RenderEndTag ();
72 if (styleSheet != null)
73 styleSheet.Render (writer);
76 protected internal override void AddedControl (Control control, int index)
78 if (control is HtmlTitle)
79 title = (HtmlTitle) control;
81 base.AddedControl (control, index);
84 protected internal override void RemovedControl (Control control)
89 base.RemovedControl (control);
92 IList IPageHeader.LinkedStyleSheets {
94 if (styleSheets == null) styleSheets = new ArrayList ();
99 IDictionary IPageHeader.Metadata {
101 if (metadata == null) metadata = new Hashtable ();
106 IStyleSheet IPageHeader.StyleSheet {
108 if (styleSheet == null) styleSheet = new StyleSheetBag ();
113 string IPageHeader.Title {
114 get { return title.Text; }
115 set { title.Text = value; }
119 internal class StyleSheetBag: IStyleSheet
121 ArrayList entries = new ArrayList ();
123 internal class StyleEntry
126 public string Selection;
127 public IUrlResolutionService UrlResolver;
130 public StyleSheetBag ()
134 public void CreateStyleRule (Style style, string selection, IUrlResolutionService urlResolver)
136 StyleEntry entry = new StyleEntry ();
138 entry.UrlResolver = urlResolver;
139 entry.Selection = selection;
143 public void RegisterStyle (Style style, IUrlResolutionService urlResolver)
145 for (int n=0; n<entries.Count; n++) {
146 if (((StyleEntry)entries[n]).Style == style)
150 string name = "aspnet_" + entries.Count;
151 style.SetRegisteredCssClass (name);
152 CreateStyleRule (style, "." + name, urlResolver);
155 public void Render (HtmlTextWriter writer)
157 writer.AddAttribute ("type", "text/css");
158 writer.RenderBeginTag (HtmlTextWriterTag.Style);
160 foreach (StyleEntry entry in entries) {
161 CssStyleCollection sts = entry.Style.GetStyleAttributes (entry.UrlResolver);
162 writer.Write ("\n" + entry.Selection + " {" + sts.BagToString () + "}");
165 writer.RenderEndTag ();