/// <summary>The get minify css pivots.</summary>
/// <param name="contentItem">The content item.</param>
/// <param name="dpiValues">The dpi values.</param>
/// <param name="mergedResources">The merged resources.</param>
/// <param name="allDpiResources">The all Dpi Resources.</param>
/// <returns>The pivots of the css to minify</returns>
private static IEnumerable <MinifyCssPivot> GetMinifyCssPivots(ContentItem contentItem, IEnumerable <float> dpiValues, Dictionary <ResourcePivotKey[], IDictionary <string, IDictionary <string, string> > > mergedResources, IDictionary <string, IDictionary <string, string> > allDpiResources)
{
var contentResourcePivotKeys = contentItem.ResourcePivotKeys ?? new ResourcePivotKey[] { };
var dpiPivots = dpiValues.Select(
dpi =>
{
var dpiResolutionName = EverythingActivity.DpiToResolutionName(dpi);
IDictionary <string, string> dpiResources = null;
if (allDpiResources != null)
{
allDpiResources.TryGetValue(dpiResolutionName, out dpiResources);
}
var dpiResourcePivotKey = new ResourcePivotKey(Strings.DpiResourcePivotKey, dpiResolutionName);
return(new { dpi, dpiResolutionName, dpiResourcePivotKey, dpiResources });
});
// Make sure we do dpi each before pivot to make it optimal when parallel
var pivots = mergedResources.SelectMany(
mergedResourceValues =>
{
var mergedResource = mergedResourceValues.Value.Values.ToList();
return(dpiPivots.Select(
dpiPivot =>
{
var dpiSpecificMergedResources = mergedResource.ToList();
if (dpiPivot.dpiResources != null)
{
dpiSpecificMergedResources.Add(dpiPivot.dpiResources);
}
return new MinifyCssPivot(
dpiSpecificMergedResources,
contentResourcePivotKeys.Concat(mergedResourceValues.Key).Concat(new[] { dpiPivot.dpiResourcePivotKey }).ToArray(),
dpiPivot.dpi);
}));
});
return(pivots);
}
/// <summary>Determines if the resource pivot key should be temporary ignored.</summary>
/// <param name="resourcePivotKey">The resource pivot key.</param>
/// <returns>The <see cref="bool"/>.</returns>
private bool ShouldIgnore(ResourcePivotKey resourcePivotKey)
{
return(this.resourcePivots.ContainsKey(resourcePivotKey.GroupKey) &&
this.resourcePivots[resourcePivotKey.GroupKey].Any() &&
this.resourcePivots[resourcePivotKey.GroupKey].All(pivotToIgnore => resourcePivotKey.Key.IndexOf(pivotToIgnore, StringComparison.OrdinalIgnoreCase) == -1));
}