ScriptResourceAttribute.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / Orcas / RTM / ndp / fx / src / xsp / System / Web / Extensions / ui / ScriptResourceAttribute.cs / 1 / ScriptResourceAttribute.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI { 
    using System; 
    using System.Collections;
    using System.Globalization; 
    using System.IO;
    using System.Reflection;
    using System.Resources;
    using System.Security.Permissions; 
    using System.Text;
    using System.Text.RegularExpressions; 
    using System.Threading; 
    using System.Web;
    using System.Web.Handlers; 
    using System.Web.Resources;
    using System.Web.Script.Serialization;
    using System.Web.Util;
 
    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)] 
    public sealed class ScriptResourceAttribute : Attribute { 
        private string _scriptName;
        private string _scriptResourceName; 
        private string _typeName;
        private static readonly Regex _webResourceRegEx = new Regex(
            @"<%\s*=\s*(?WebResource|ScriptResource)\(""(?[^""]*)""\)\s*%>",
            RegexOptions.Singleline | RegexOptions.Multiline); 

        public ScriptResourceAttribute(string scriptName, string scriptResourceName, string typeName) { 
            if (String.IsNullOrEmpty(scriptName)) { 
                throw new ArgumentException(AtlasWeb.Common_NullOrEmpty, "scriptName");
            } 
            if (String.IsNullOrEmpty(scriptResourceName)) {
                throw new ArgumentException(AtlasWeb.Common_NullOrEmpty, "scriptResourceName");
            }
            if (String.IsNullOrEmpty(typeName)) { 
                throw new ArgumentException(AtlasWeb.Common_NullOrEmpty, "typeName");
            } 
            _scriptName = scriptName; 
            _scriptResourceName = scriptResourceName;
            _typeName = typeName; 
        }

        public string ScriptName {
            get { 
                return _scriptName;
            } 
        } 

        public string ScriptResourceName { 
            get {
                return _scriptResourceName;
            }
        } 

        public string TypeName { 
            get { 
                return _typeName;
            } 
        }

        private static void CopyScriptToStringBuilderWithSubstitution(
            string content, Assembly assembly, bool zip, bool notifyScriptLoaded, StringBuilder output) { 

            // Looking for something of the form: WebResource("resourcename") 
            MatchCollection matches = _webResourceRegEx.Matches(content); 
            int startIndex = 0;
            foreach (Match match in matches) { 
                output.Append(content.Substring(startIndex, match.Index - startIndex));

                Group group = match.Groups["resourceName"];
                string embeddedResourceName = group.Value; 
                bool isScriptResource = String.Equals(
                    match.Groups["resourceType"].Value, "ScriptResource", StringComparison.Ordinal); 
                try { 
                    if (isScriptResource) {
                        output.Append(ScriptResourceHandler.GetScriptResourceUrl( 
                            assembly, embeddedResourceName, CultureInfo.CurrentUICulture, zip, notifyScriptLoaded));
                    }
                    else {
                        output.Append(ScriptResourceHandler.GetWebResourceUrl(assembly, embeddedResourceName)); 
                    }
                } 
                catch (HttpException e) { 
                    throw new HttpException(String.Format(CultureInfo.CurrentCulture,
                        AtlasWeb.ScriptResourceHandler_UnknownResource, 
                        embeddedResourceName), e);
                }

                startIndex = match.Index + match.Length; 
            }
 
            output.Append(content.Substring(startIndex, content.Length - startIndex)); 
        }
 
        internal static ResourceManager GetResourceManager(string resourceName, Assembly assembly) {
            if (String.IsNullOrEmpty(resourceName)) {
                return null;
            } 
            return new ResourceManager(GetResourceName(resourceName), assembly);
        } 
 
        private static string GetResourceName(string rawResourceName) {
            if (rawResourceName.EndsWith(".resources", StringComparison.OrdinalIgnoreCase)) { 
                return rawResourceName.Substring(0, rawResourceName.Length - 10);
            }
            return rawResourceName;
        } 

        internal static string GetScriptFromWebResourceInternal( 
            Assembly assembly, string resourceName, CultureInfo culture, 
            bool zip, bool notifyScriptLoaded,
            out Encoding encoding, out string contentType) { 

            ScriptResourceInfo resourceInfo = ScriptResourceInfo.GetInstance(assembly, resourceName);
            ScriptResourceInfo releaseResourceInfo = null;
            if (resourceName.EndsWith(".debug.js", StringComparison.OrdinalIgnoreCase)) { 
                // This is a debug script, we'll need to merge the debug resource
                // with the release one. 
                string releaseResourceName = resourceName.Substring(0, resourceName.Length - 9) + ".js"; 
                releaseResourceInfo = ScriptResourceInfo.GetInstance(assembly, releaseResourceName);
            } 
            if ((resourceInfo == ScriptResourceInfo.Empty) &&
                ((releaseResourceInfo == null) || (releaseResourceInfo == ScriptResourceInfo.Empty))) {

                throw new HttpException(AtlasWeb.ScriptResourceHandler_InvalidRequest); 
            }
 
            ResourceManager resourceManager = null; 
            ResourceSet neutralSet = null;
            ResourceManager releaseResourceManager = null; 
            ResourceSet releaseNeutralSet = null;
            CultureInfo previousCulture = Thread.CurrentThread.CurrentUICulture;

            try { 
                Thread.CurrentThread.CurrentUICulture = culture;
 
                if (!String.IsNullOrEmpty(resourceInfo.ScriptResourceName)) { 
                    resourceManager = GetResourceManager(resourceInfo.ScriptResourceName, assembly);
                    // The following may throw MissingManifestResourceException 
                    neutralSet = resourceManager.GetResourceSet(CultureInfo.InvariantCulture, true, true);
                }
                if ((releaseResourceInfo != null) &&
                    !String.IsNullOrEmpty(releaseResourceInfo.ScriptResourceName)) { 

                    releaseResourceManager = GetResourceManager(releaseResourceInfo.ScriptResourceName, assembly); 
                    releaseNeutralSet = releaseResourceManager.GetResourceSet(CultureInfo.InvariantCulture, true, true); 
                }
                if ((releaseResourceInfo != null) && 
                    !String.IsNullOrEmpty(releaseResourceInfo.ScriptResourceName) &&
                    !String.IsNullOrEmpty(resourceInfo.ScriptResourceName) &&
                    (releaseResourceInfo.TypeName != resourceInfo.TypeName)) {
                    throw new HttpException(String.Format( 
                        CultureInfo.CurrentCulture,
                        AtlasWeb.ScriptResourceHandler_TypeNameMismatch, 
                        releaseResourceInfo.ScriptResourceName)); 
                }
 
                StringBuilder builder = new StringBuilder();
                encoding = WriteScript(assembly,
                    resourceInfo, releaseResourceInfo,
                    resourceManager, neutralSet, 
                    releaseResourceManager, releaseNeutralSet,
                    zip, notifyScriptLoaded, builder); 
                contentType = resourceInfo.ContentType; 
                return builder.ToString();
            } 
            finally {
                Thread.CurrentThread.CurrentUICulture = previousCulture;

                if (releaseNeutralSet != null) { 
                    releaseNeutralSet.Dispose();
                } 
                if (neutralSet != null) { 
                    neutralSet.Dispose();
                } 
            }
        }

        private static void RegisterNamespace(StringBuilder builder, string typeName, bool isDebug) { 
            int lastDot = typeName.LastIndexOf('.');
            if (lastDot != -1) { 
                builder.Append("Type.registerNamespace('"); 
                builder.Append(typeName.Substring(0, lastDot));
                builder.Append("');"); 
                if (isDebug) builder.AppendLine();
            }
        }
 
        private static void WriteNotificationToStringBuilder(bool notifyScriptLoaded, StringBuilder builder, bool isDebug) {
            if (notifyScriptLoaded) { 
                // DevDiv Bugs 131109: Resources and notification should go on a new line even in release mode 
                // because main script may not end in a semi-colon or may end in a javascript comment.
                // Note: If resources exist, this newline isn't necessary because one was already output. 
                // But it is not worth keeping track of whether a newline has been output.
                // A newline is required for resources and notification, better to just output it for both.
                builder.AppendLine();
                builder.Append("if(typeof(Sys)!=='undefined')Sys.Application.notifyScriptLoaded();"); 
            }
        } 
 
        private static bool WriteResource(
            StringBuilder builder, 
            ResourceManager resourceManager,
            ResourceSet neutralSet,
            bool first,
            bool isDebug) { 

            foreach (DictionaryEntry res in neutralSet) { 
                string key = (string)res.Key; 
                string value = resourceManager.GetObject(key) as string;
                if (value != null) { 
                    if (first) {
                        first = false;
                    }
                    else { 
                        builder.Append(',');
                    } 
                    if (isDebug) builder.AppendLine(); 
                    builder.Append('"');
                    builder.Append(JavaScriptString.QuoteString(key)); 
                    builder.Append("\":\"");
                    builder.Append(JavaScriptString.QuoteString(value));
                    builder.Append('"');
                } 
            }
            return first; 
        } 

        private static void WriteResourceToStringBuilder( 
            ScriptResourceInfo resourceInfo,
            ScriptResourceInfo releaseResourceInfo,
            ResourceManager resourceManager,
            ResourceSet neutralSet, 
            ResourceManager releaseResourceManager,
            ResourceSet releaseNeutralSet, 
            StringBuilder builder) { 

            if ((resourceManager != null) || (releaseResourceManager != null)) { 
                string typeName = resourceInfo.TypeName;
                if (String.IsNullOrEmpty(typeName)) {
                    typeName = releaseResourceInfo.TypeName;
                } 
                WriteResources(builder, typeName, resourceManager, neutralSet,
                    releaseResourceManager, releaseNeutralSet, resourceInfo.IsDebug); 
            } 
        }
 
        private static void WriteResources(StringBuilder builder, string typeName,
            ResourceManager resourceManager, ResourceSet neutralSet,
            ResourceManager releaseResourceManager, ResourceSet releaseNeutralSet,
            bool isDebug) { 

            // DevDiv Bugs 131109: Resources and notification should go on a new line even in release mode 
            // because main script may not end in a semi-colon or may end in a javascript comment. 
            builder.AppendLine();
            RegisterNamespace(builder, typeName, isDebug); 
            builder.Append(typeName);
            builder.Append("={");
            bool first = true;
            if (resourceManager != null) { 
                first = WriteResource(builder, resourceManager, neutralSet, first, isDebug);
            } 
            if (releaseResourceManager != null) { 
                WriteResource(builder, releaseResourceManager, releaseNeutralSet, first, isDebug);
            } 
            if (isDebug) {
                builder.AppendLine();
                builder.AppendLine("};");
            } 
            else{
                builder.Append("};"); 
            } 
        }
 
        private static Encoding WriteScript(Assembly assembly,
            ScriptResourceInfo resourceInfo, ScriptResourceInfo releaseResourceInfo,
            ResourceManager resourceManager, ResourceSet neutralSet,
            ResourceManager releaseResourceManager, ResourceSet releaseNeutralSet, 
            bool zip, bool notifyScriptLoaded, StringBuilder output) {
 
            Encoding encoding = null; 
            using (StreamReader reader = new StreamReader(
                assembly.GetManifestResourceStream(resourceInfo.ScriptName), true)) { 

                encoding = reader.CurrentEncoding;

                if (resourceInfo.IsDebug) { 
                    // Output version information
                    AssemblyName assemblyName = assembly.GetName(); 
                    output.AppendLine("// Name:        " + resourceInfo.ScriptName); 
                    output.AppendLine("// Assembly:    " + assemblyName.Name);
                    output.AppendLine("// Version:     " + assemblyName.Version.ToString()); 
                    output.AppendLine("// FileVersion: " + AssemblyUtil.GetAssemblyFileVersion(assembly));
                }
                if (resourceInfo.PerformSubstitution) {
                    CopyScriptToStringBuilderWithSubstitution( 
                        reader.ReadToEnd(), assembly, zip, notifyScriptLoaded, output);
                } 
                else { 
                    output.Append(reader.ReadToEnd());
                } 
                WriteResourceToStringBuilder(resourceInfo, releaseResourceInfo,
                    resourceManager, neutralSet,
                    releaseResourceManager, releaseNeutralSet,
                    output); 
                WriteNotificationToStringBuilder(notifyScriptLoaded, output, resourceInfo.IsDebug);
            } 
            return encoding; 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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ScriptResourceAttribute.cs source code in C# .NET

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