ThemeDirectoryCompiler.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Compilation / ThemeDirectoryCompiler.cs / 1305376 / ThemeDirectoryCompiler.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

 
 
namespace System.Web.Compilation {
 
using System;
using System.IO;
using System.Collections;
using System.Globalization; 
using System.CodeDom.Compiler;
using System.Configuration; 
using System.Security.Permissions; 
using System.Web.Hosting;
using System.Web.Util; 
using System.Web.UI;

internal static class ThemeDirectoryCompiler {
 
    internal const string skinExtension = ".skin";
 
    internal static VirtualPath GetAppThemeVirtualDir(string themeName) { 
        return HttpRuntime.AppDomainAppVirtualPathObject.SimpleCombineWithDir(HttpRuntime.ThemesDirectoryName + "/" + themeName);
    } 

    internal static VirtualPath GetGlobalThemeVirtualDir(string themeName) {
        return BuildManager.ScriptVirtualDir.SimpleCombineWithDir(HttpRuntime.GlobalThemesDirectoryName + "/" + themeName);
    } 

    // We need to Assert here since there could be user code on the stack (VSWhidbey 259563) 
    [PermissionSet(SecurityAction.Assert, Unrestricted=true)] 
    internal static BuildResultCompiledType GetThemeBuildResultType(HttpContext context, string themeName) {
        using (new ApplicationImpersonationContext()) { 
            return GetThemeBuildResultType(themeName);
        }
    }
 
    private static BuildResultCompiledType GetThemeBuildResultType(string themeName) {
 
        string appThemeCacheKey, globalThemeCacheKey = null; 

        // First, check if the application theme is cached 
        appThemeCacheKey = "Theme_" + Util.MakeValidTypeNameFromString(themeName);
        BuildResultCompiledType result = (BuildResultCompiledType)
            BuildManager.GetBuildResultFromCache(appThemeCacheKey);
 
        if (result == null) {
            // Then, check if the global theme is cached 
            globalThemeCacheKey = "GlobalTheme_" + themeName; 
            result = (BuildResultCompiledType) BuildManager.GetBuildResultFromCache(
                globalThemeCacheKey); 
        }

        // If we found a theme buildresulttype, return it
        if (result != null) 
            return result;
 
        bool gotLock = false; 

        try { 
            // Grab the compilation mutex
            CompilationLock.GetLock(ref gotLock);

            // Check the cache again now that we have the mutex 
            result = (BuildResultCompiledType)BuildManager.GetBuildResultFromCache(appThemeCacheKey);
            if (result == null) { 
                result = (BuildResultCompiledType)BuildManager.GetBuildResultFromCache( 
                    globalThemeCacheKey);
            } 

            if (result != null)
                return result;
 
        // Theme was not found in the caches; check if the directory exists.
        VirtualPath appVirtualDir, globalVirtualDir = null; 
 
        appVirtualDir = GetAppThemeVirtualDir(themeName);
        PageThemeBuildProvider themeBuildProvider = null; 

        VirtualPath virtualDir = appVirtualDir;

        string cacheKey = appThemeCacheKey; 
        // If the theme directories do not exist, simply throw
        if (appVirtualDir.DirectoryExists()) { 
            themeBuildProvider = new PageThemeBuildProvider(appVirtualDir); 
        }
        else { 
            globalVirtualDir = GetGlobalThemeVirtualDir(themeName);

            if (!globalVirtualDir.DirectoryExists()) {
                throw new HttpException(SR.GetString(SR.Page_theme_not_found, themeName)); 
            }
 
            virtualDir = globalVirtualDir; 
            cacheKey = globalThemeCacheKey;
            themeBuildProvider = new GlobalPageThemeBuildProvider(globalVirtualDir); 
        }

        // The directory exists (either app or global), so compile it
        DateTime utcStart = DateTime.UtcNow; 

        VirtualDirectory vdir = virtualDir.GetDirectory(); 
 
        // Add all the .skin files to it
        AddThemeFilesToBuildProvider(vdir, themeBuildProvider, true); 

        // Use predictable fixed names for theme assemblies.
        BuildProvidersCompiler bpc = new BuildProvidersCompiler(virtualDir,
            themeBuildProvider.AssemblyNamePrefix + BuildManager.GenerateRandomAssemblyName(themeName)); 

        // Add the single build provider to the BuildProvidersCompiler 
        bpc.SetBuildProviders(new SingleObjectCollection(themeBuildProvider)); 

        // Compile it 
        CompilerResults results = bpc.PerformBuild();

        // Get the Type we care about from the BuildProvider
        result = (BuildResultCompiledType) themeBuildProvider.GetBuildResult(results); 

        // Cache it for next time 
        BuildManager.CacheBuildResult(cacheKey, result, utcStart); 

        } 
        finally {
            // Always release the mutex if we had taken it
            if (gotLock) {
                CompilationLock.ReleaseLock(); 
            }
        } 
        return result; 
    }
 
    private static void AddThemeFilesToBuildProvider(VirtualDirectory vdir,
        PageThemeBuildProvider themeBuildProvider, bool topLevel) {

        // Go through all the files in the directory 
        foreach (VirtualFileBase child in vdir.Children) {
 
            // Recursive into subdirectories. 
            if (child.IsDirectory) {
                AddThemeFilesToBuildProvider(child as VirtualDirectory, themeBuildProvider, false); 
                continue;
            }

            // We only process .skin and .css files 
            string extension = Path.GetExtension(child.Name);
            if ((StringUtil.EqualsIgnoreCase(extension, skinExtension)) && topLevel) { 
                themeBuildProvider.AddSkinFile(child.VirtualPathObject); 
                continue;
            } 

            if (StringUtil.EqualsIgnoreCase(extension, ".css")) {
                themeBuildProvider.AddCssFile(child.VirtualPathObject);
                continue; 
            }
        } 
    } 
}
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ThemeDirectoryCompiler.cs source code in C# .NET

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