1 files changed, 81 insertions, 2 deletions
diff --git a/src/js/dashboard-common.js b/src/js/dashboard-common.js
index ef24457..e34e18a 100644
--- a/src/js/dashboard-common.js
+++ b/src/js/dashboard-common.js
@@ -24,7 +24,86 @@
 
 /******************************************************************************/
 
-uDom.onLoad(function() {
+self.uBlockDashboard = self.uBlockDashboard || {};
+
+/******************************************************************************/
+
+// Helper for client panes:
+//   Remove literal duplicate lines from a set based on another set.
+
+self.uBlock.mergeNewLines = function(text, newText) {
+    var lineBeg, textEnd, lineEnd;
+    var line, hash, bucket;
+
+    // Step 1: build dictionary for existing lines.
+    var fromDict = Object.create(null);
+    lineBeg = 0;
+    textEnd = text.length;
+    while ( lineBeg < textEnd ) {
+        lineEnd = text.indexOf('\n', lineBeg);
+        if ( lineEnd === -1 ) {
+            lineEnd = text.indexOf('\r', lineBeg);
+            if ( lineEnd === -1 ) {
+                lineEnd = textEnd;
+            }
+        }
+        line = text.slice(lineBeg, lineEnd).trim();
+        lineBeg = lineEnd + 1;
+        if ( line.length === 0 ) {
+            continue;
+        }
+        hash = line.slice(0, 8);
+        bucket = fromDict[hash];
+        if ( bucket === undefined ) {
+            fromDict[hash] = line;
+        } else if ( typeof bucket === 'string' ) {
+            fromDict[hash] = [bucket, line];
+        } else /* if ( Array.isArray(bucket) ) */ {
+            bucket.push(line);
+        }
+    }
+
+    // Step 2: use above dictionary to filter out duplicate lines.
+    var out = [ '' ];
+    lineBeg = 0;
+    textEnd = newText.length;
+    while ( lineBeg < textEnd ) {
+        lineEnd = newText.indexOf('\n', lineBeg);
+        if ( lineEnd === -1 ) {
+            lineEnd = newText.indexOf('\r', lineBeg);
+            if ( lineEnd === -1 ) {
+                lineEnd = textEnd;
+            }
+        }
+        line = newText.slice(lineBeg, lineEnd).trim();
+        lineBeg = lineEnd + 1;
+        if ( line.length === 0 ) {
+            if ( out[out.length - 1] !== '' ) {
+                out.push('');
+            }
+            continue;
+        }
+        bucket = fromDict[line.slice(0, 8)];
+        if ( bucket === undefined ) {
+            out.push(line);
+            continue;
+        }
+        if ( typeof bucket === 'string' && line !== bucket ) {
+            out.push(line);
+            continue;
+        }
+        if ( bucket.indexOf(line) === -1 ) {
+            out.push(line);
+            /* continue; */
+        }
+    }
+
+    return text.trim() + '\n' + out.join('\n');
+};
+
+/******************************************************************************/
+
+(function() {
     // Open links in the proper window
     uDom('a').attr('target', '_blank');
     uDom('a[href*="dashboard.html"]').attr('target', '_parent');
@@ -34,4 +113,4 @@ uDom.onLoad(function() {
             .descendants('.whatisthis-expandable')
             .toggleClass('whatisthis-expanded');
     });
-});
+})();