1 files changed, 113 insertions, 0 deletions
diff --git a/app/assets/javascripts/line_highlighter.js b/app/assets/javascripts/line_highlighter.js
new file mode 100644
index 00000000000..97da6c9917e
--- /dev/null
+++ b/app/assets/javascripts/line_highlighter.js
@@ -0,0 +1,113 @@
+// Generated by CoffeeScript 1.10.0
+(function() {
+  var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
+
+  this.LineHighlighter = (function() {
+    LineHighlighter.prototype.highlightClass = 'hll';
+
+    LineHighlighter.prototype._hash = '';
+
+    function LineHighlighter(hash) {
+      var range;
+      if (hash == null) {
+        hash = location.hash;
+      }
+      this.setHash = bind(this.setHash, this);
+      this.highlightLine = bind(this.highlightLine, this);
+      this.clickHandler = bind(this.clickHandler, this);
+      this._hash = hash;
+      this.bindEvents();
+      if (hash !== '') {
+        range = this.hashToRange(hash);
+        if (range[0]) {
+          this.highlightRange(range);
+          $.scrollTo("#L" + range[0], {
+            offset: -150
+          });
+        }
+      }
+    }
+
+    LineHighlighter.prototype.bindEvents = function() {
+      $('#blob-content-holder').on('mousedown', 'a[data-line-number]', this.clickHandler);
+      return $('#blob-content-holder').on('click', 'a[data-line-number]', function(event) {
+        return event.preventDefault();
+      });
+    };
+
+    LineHighlighter.prototype.clickHandler = function(event) {
+      var current, lineNumber, range;
+      event.preventDefault();
+      this.clearHighlight();
+      lineNumber = $(event.target).closest('a').data('line-number');
+      current = this.hashToRange(this._hash);
+      if (!(current[0] && event.shiftKey)) {
+        this.setHash(lineNumber);
+        return this.highlightLine(lineNumber);
+      } else if (event.shiftKey) {
+        if (lineNumber < current[0]) {
+          range = [lineNumber, current[0]];
+        } else {
+          range = [current[0], lineNumber];
+        }
+        this.setHash(range[0], range[1]);
+        return this.highlightRange(range);
+      }
+    };
+
+    LineHighlighter.prototype.clearHighlight = function() {
+      return $("." + this.highlightClass).removeClass(this.highlightClass);
+    };
+
+    LineHighlighter.prototype.hashToRange = function(hash) {
+      var first, last, matches;
+      matches = hash.match(/^#?L(\d+)(?:-(\d+))?$/);
+      if (matches && matches.length) {
+        first = parseInt(matches[1]);
+        last = matches[2] ? parseInt(matches[2]) : null;
+        return [first, last];
+      } else {
+        return [null, null];
+      }
+    };
+
+    LineHighlighter.prototype.highlightLine = function(lineNumber) {
+      return $("#LC" + lineNumber).addClass(this.highlightClass);
+    };
+
+    LineHighlighter.prototype.highlightRange = function(range) {
+      var i, lineNumber, ref, ref1, results;
+      if (range[1]) {
+        results = [];
+        for (lineNumber = i = ref = range[0], ref1 = range[1]; ref <= ref1 ? i <= ref1 : i >= ref1; lineNumber = ref <= ref1 ? ++i : --i) {
+          results.push(this.highlightLine(lineNumber));
+        }
+        return results;
+      } else {
+        return this.highlightLine(range[0]);
+      }
+    };
+
+    LineHighlighter.prototype.setHash = function(firstLineNumber, lastLineNumber) {
+      var hash;
+      if (lastLineNumber) {
+        hash = "#L" + firstLineNumber + "-" + lastLineNumber;
+      } else {
+        hash = "#L" + firstLineNumber;
+      }
+      this._hash = hash;
+      return this.__setLocationHash__(hash);
+    };
+
+    LineHighlighter.prototype.__setLocationHash__ = function(value) {
+      return history.pushState({
+        turbolinks: false,
+        url: value
+      }, document.title, value);
+    };
+
+    return LineHighlighter;
+
+  })();
+
+}).call(this);