mutationobserver to hide if fully covered. (#207)

Author: tonyhallett

README.md

@@ -130,6 +130,7 @@ ThresholdForCrapScore              When [crap score](https://testing.googleblog.
 
 StickyCoverageTable                Set to true for coverage table to have a sticky thead.
 NamespacedClasses                  Set to false to show classes in report in short form. Affects grouping.
+HideFullyCovered                   Set to true to hide classes, namespaces and assemblies that are fully covered.
 
 RunSettingsOnly					   Specify false for global and project options to be used for coverlet data collector configuration elements when not specified in runsettings
 CoverletCollectorDirectoryPath	   Specify path to directory containing coverlet collector files if you need functionality that the FCC version does not provide.

SharedProject/Core/ReportGenerator/ReportGeneratorUtil.cs

@@ -765,6 +765,62 @@ private string HideGroupingCss()
 ";
 		}
 
+		private string ObserveAndHideFullyCovered()
+        {
+            if (!appOptionsProvider.Get().HideFullyCovered)
+            {
+				return "";
+            }
+			return @"
+var targetNode = document;//document.querySelector('table.overview.table-fixed.stripped');
+
+var config = { attributes: false, childList: true, subtree: true };
+
+var callback = function(mutationsList, observer) {
+	var fullyCoveredTds = document.querySelectorAll('td.covered100.green')
+
+	for (var i = 0; i < fullyCoveredTds.length; i++)
+	{
+		var td = fullyCoveredTds[i];
+		var parent = td.parentNode;
+		if (parent.nodeName === 'TABLE')
+		{
+			parent = parent.parentNode;
+			if (parent.nodeName === 'COVERAGE-BAR')
+			{
+				parent = parent.parentNode;
+				if (parent.nodeName === 'TD' || parent.nodeName === 'TH')
+				{
+					parent = parent.parentNode;
+					var coverageBars = parent.querySelectorAll('td>coverage-bar');
+					if(coverageBars.length == 0){
+						coverageBars = parent.querySelectorAll('th>coverage-bar');
+					}
+					var shouldHide = true;
+					// currently there is no option to hide branch coverage.
+					if(coverageBars.length === 2){
+						var branchCoverageBar = coverageBars[1];
+						// includes gray
+						var td = branchCoverageBar.querySelector('table>td.covered100');
+						if(!td){
+							shouldHide = false;
+						}
+					}
+					if(shouldHide){
+						parent.style.setProperty('display', 'none');
+					}
+				}
+			}
+
+		}
+	}
+};
+
+var observer = new MutationObserver(callback);
+observer.observe(targetNode, config);
+";
+        }
+
 		private string HackGroupingToAllowAll(int groupingLevel)
         {
 			return $@"
@@ -933,6 +989,7 @@ public string ProcessUnifiedHtml(string htmlForProcessing, string reportOutputFo
 					<script type=""text/javascript"">
 						{GetStickyTableHead()}
 						{HackGroupingToAllowAll(groupingLevel)}
+						{ObserveAndHideFullyCovered()}
 						function getRuleBySelector(cssRules,selector){{
 						for(var i=0;i<cssRules.length;i++){{
 							if(cssRules[i].selectorText == selector){{

SharedProject/Options/AppOptions.cs

@@ -163,6 +163,10 @@ You can also ignore additional attributes by adding to this list (short name or
         [Description("Set to false to show classes in report in short form.")]
         public bool NamespacedClasses { get; set; } = true;
 
+        [Category(reportCategory)]
+        [Description("Set to true to hide classes, namespaces and assemblies that are fully covered.")]
+        public bool HideFullyCovered { get; set; }
+
         [SuppressMessage("Usage", "VSTHRD010:Invoke single-threaded types on Main thread")]
         public override void SaveSettingsToStorage()
         {

SharedProject/Options/IAppOptions.cs

@@ -24,5 +24,6 @@ public interface IAppOptions
         bool CoverageColoursFromFontsAndColours { get; }
         bool StickyCoverageTable { get; }
         bool NamespacedClasses { get; }
+        bool HideFullyCovered { get; }
     }
 }