/// <summary>Gets the unique object for all the settings, used for determining unique cache id.</summary>
/// <param name="imageHasher">The image Hasher.</param>
/// <param name="resourcePivotKeys">The resource Pivot Keys.</param>
/// <param name="dpiResources">The dpi Resources.</param>
/// <returns>The settings object.</returns>
private object GetVarBySettings(FileHasherActivity imageHasher, IEnumerable <ResourcePivotKey> resourcePivotKeys, IEnumerable <IDictionary <string, string> > dpiResources)
{
return(new
{
resourcePivotKeys,
dpiResources,
this.ShouldExcludeProperties,
this.ShouldValidateForLowerCase,
this.ShouldMergeMediaQueries,
this.ShouldOptimize,
this.ShouldAssembleBackgroundImages,
this.ShouldMinify,
this.ShouldPreventOrderBasedConflict,
this.ShouldMergeBasedOnCommonDeclarations,
this.IgnoreImagesWithNonDefaultBackgroundSize,
this.HackSelectors,
this.BannedSelectors,
this.NonMergeSelectors,
this.ImageAssembleReferencesToIgnore,
this.OutputUnit,
this.OutputUnitFactor,
this.ImageAssemblyPadding,
HashImages = imageHasher == null,
this.ForcedSpritingImageType,
this.ErrorOnInvalidSprite,
this.ImageAssembleScanDestinationFile,
this.ImageSpritingLogPath,
});
}
internal void Execute(ContentItem contentItem = null, FileHasherActivity imageHasher = null)
{
if (contentItem == null)
{
if (string.IsNullOrWhiteSpace(this.SourceFile))
{
throw new ArgumentException("MinifyCssActivity - The source file cannot be null or whitespace.");
}
if (!File.Exists(this.SourceFile))
{
throw new FileNotFoundException("MinifyCssActivity - The source file cannot be found.", this.SourceFile);
}
}
if (string.IsNullOrWhiteSpace(this.DestinationFile))
{
throw new ArgumentException("MinifyCssActivity - The destination file cannot be null or whitespace.");
}
if (contentItem == null)
{
contentItem = ContentItem.FromFile(this.SourceFile, Path.IsPathRooted(this.SourceFile) ? this.SourceFile.MakeRelativeToDirectory(this.context.Configuration.SourceDirectory) : this.SourceFile);
}
var minifyresult = this.Process(contentItem, imageHasher);
var css = minifyresult.Css.FirstOrDefault();
if (css != null)
{
css.WriteTo(this.DestinationFile);
}
if (minifyresult.SpritedImages != null && minifyresult.SpritedImages.Any())
{
foreach (var spritedImage in minifyresult.SpritedImages)
{
spritedImage.WriteToContentPath(this.context.Configuration.DestinationDirectory);
}
}
if (minifyresult.HashedImages != null && minifyresult.HashedImages.Any())
{
foreach (var hashedImage in minifyresult.HashedImages)
{
hashedImage.WriteToRelativeHashedPath(this.context.Configuration.DestinationDirectory);
}
}
}
/// <summary>Hash the images.</summary>
/// <param name="cssContent">The css content.</param>
/// <param name="imageHasher">The image Hasher.</param>
/// <param name="cacheSection">The cache section.</param>
/// <param name="threadContext">The context.</param>
/// <param name="sourceImages">The source Images.</param>
/// <param name="missingImage">The missing Image.</param>
/// <returns>The css with hashed images.</returns>
private static Tuple <string, IEnumerable <ContentItem> > HashImages(string cssContent, FileHasherActivity imageHasher, ICacheSection cacheSection, IWebGreaseContext threadContext, IDictionary <string, string> sourceImages, string missingImage)
{
return(threadContext.SectionedAction(SectionIdParts.MinifyCssActivity, SectionIdParts.ImageHash).Execute(() =>
{
var contentImagesToHash = new HashSet <string>();
var hashedContentItems = new List <ContentItem>();
var hashedImages = new Dictionary <string, string>();
cssContent = UrlHashRegexPattern.Replace(
cssContent,
match =>
{
var urlToHash = match.Groups["url"].Value;
var extraInfo = match.Groups["extra"].Value;
if (ResourcesResolver.LocalizationResourceKeyRegex.IsMatch(urlToHash))
{
return match.Value;
}
var normalizedHashUrl = urlToHash.NormalizeUrl();
var imageContentFile = sourceImages.TryGetValue(normalizedHashUrl);
if (imageContentFile == null && !string.IsNullOrWhiteSpace(missingImage))
{
imageContentFile = sourceImages.TryGetValue(missingImage);
}
if (imageContentFile == null)
{
throw new BuildWorkflowException("Could not find a matching source image for url: {0}".InvariantFormat(urlToHash));
}
if (contentImagesToHash.Add(normalizedHashUrl))
{
// Add the image as end result
var imageContentItem = ContentItem.FromFile(imageContentFile, normalizedHashUrl);
imageContentItem = imageHasher.Hash(imageContentItem);
cacheSection.AddSourceDependency(imageContentFile);
hashedContentItems.Add(imageContentItem);
imageContentFile =
Path.Combine(
imageHasher.BasePrefixToAddToOutputPath ?? Path.AltDirectorySeparatorChar.ToString(CultureInfo.InvariantCulture),
imageContentItem.RelativeHashedContentPath.Replace(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar));
hashedImages.Add(normalizedHashUrl, imageContentFile);
}
else
{
imageContentFile = hashedImages[normalizedHashUrl];
}
return "url(" + imageContentFile + extraInfo + ")";
});
return Tuple.Create(cssContent, (IEnumerable <ContentItem>)hashedContentItems);
}));
}
internal MinifyCssResult Process(ContentItem contentItem, FileHasherActivity imageHasher = null)
{
if (imageHasher != null)
{
this.availableSourceImages = this.context.GetAvailableFiles(this.context.Configuration.SourceDirectory, this.ImageDirectories, this.ImageExtensions, FileTypes.Image);
}
var cssContent = contentItem.Content;
var minifiedContentItems = new BlockingCollection <ContentItem>();
var hashedImageContentItems = new BlockingCollection <ContentItem>();
var spritedImageContentItems = new BlockingCollection <ContentItem>();
var mergedResources = ResourcePivotActivity.GetUsedGroupedResources(cssContent, this.MergedResources);
var dpiValues = this.Dpi;
if (dpiValues == null || !dpiValues.Any())
{
dpiValues = new HashSet <float>(new[] { 1f });
}
var pivots = GetMinifyCssPivots(contentItem, dpiValues, mergedResources, this.DpiResources).ToArray();
var nonIgnoredPivots = pivots.Where(p => !this.context.TemporaryIgnore(p.NewContentResourcePivotKeys)).ToArray();
var parsedStylesheetNode = CssParser.Parse(this.context, cssContent, false);
this.context.ParallelForEach(
item => new[] { SectionIdParts.MinifyCssActivity },
nonIgnoredPivots,
(threadContext, pivot, parallelLoopState) =>
{
ContentItem minifiedContentItem = null;
var resourceContentItem = ContentItem.FromContent(contentItem.Content, pivot.NewContentResourcePivotKeys);
var result = threadContext
.SectionedAction(SectionIdParts.MinifyCssActivity, SectionIdParts.Process)
.MakeCachable(resourceContentItem, this.GetVarBySettings(imageHasher, pivot.NewContentResourcePivotKeys, pivot.MergedResource))
.RestoreFromCacheAction(cacheSection =>
{
minifiedContentItem = cacheSection.GetCachedContentItem(CacheFileCategories.MinifiedCssResult, contentItem.RelativeContentPath, contentItem.AbsoluteDiskPath, pivot.NewContentResourcePivotKeys);
hashedImageContentItems.AddRange(cacheSection.GetCachedContentItems(CacheFileCategories.HashedImage));
spritedImageContentItems.AddRange(cacheSection.GetCachedContentItems(CacheFileCategories.HashedSpriteImage));
if (minifiedContentItem == null)
{
context.Log.Error("Css minify cache result is null");
return(false);
}
if (spritedImageContentItems.Any(hi => hi == null))
{
context.Log.Error("Sprited image cache result is null");
return(false);
}
if (hashedImageContentItems.Any(hi => hi == null))
{
context.Log.Error("Hashed image cache result is null");
return(false);
}
return(true);
})
.Execute(cacheSection =>
{
try
{
// Apply all configured visitors, including, validating, optimizing, minifying and spriting.
// Applying of resources
var stylesheetNode = ApplyResources(parsedStylesheetNode, pivot.MergedResource, threadContext) as StyleSheetNode;
// Validation
stylesheetNode = this.ApplyValidation(stylesheetNode, threadContext) as StyleSheetNode;
// Optimization
stylesheetNode = this.ApplyOptimization(stylesheetNode, threadContext) as StyleSheetNode;
// Spriting
stylesheetNode = this.ApplySpriting(stylesheetNode, pivot.Dpi, spritedImageContentItems, threadContext) as StyleSheetNode;
// Output css as string
var processedCssContent = threadContext.SectionedAction(SectionIdParts.MinifyCssActivity, SectionIdParts.PrintCss).Execute(() =>
this.ShouldMinify ? stylesheetNode.MinifyPrint() : stylesheetNode.PrettyPrint());
// TODO: Hash the images on the styielsheetnode not on the css result.
// Hash images on the result css
if (imageHasher != null)
{
var hashResult = HashImages(processedCssContent, imageHasher, cacheSection, threadContext, this.availableSourceImages, this.MissingImageUrl);
processedCssContent = hashResult.Item1;
hashedImageContentItems.AddRange(hashResult.Item2);
}
minifiedContentItem = ContentItem.FromContent(processedCssContent, this.DestinationFile, null, pivot.NewContentResourcePivotKeys);
cacheSection.AddResult(minifiedContentItem, CacheFileCategories.MinifiedCssResult);
}
catch (Exception ex)
{
context.Log.Error(ex, ex.ToString());
return(false);
}
return(true);
});
Safe.Lock(minifiedContentItems, () => minifiedContentItems.Add(minifiedContentItem));
if (!result)
{
context.Log.Error("An errror occurred while minifying '{0}' with resources '{1}'".InvariantFormat(contentItem.RelativeContentPath, pivot));
}
return(result);
});
return(new MinifyCssResult(
minifiedContentItems,
spritedImageContentItems.DistinctBy(hi => hi.RelativeContentPath).ToArray(),
hashedImageContentItems.DistinctBy(hi => hi.RelativeContentPath).ToArray()));
}