When the editor buffer changes and the path is not visible in the TreeView, It selects the closes ancestor entry of that file.

spec/extensions/tree-view-spec.coffee

@@ -204,13 +204,24 @@ describe "TreeView", ->
       expect(rootView.activeEditor().isFocused).toBeFalsy()
 
   describe "when a new file is opened in the active editor", ->
-    it "is selected in the tree view if visible", ->
+    it "is selected in the tree view if the file's entry visible", ->
       sampleJs.click()
       rootView.open(require.resolve('fixtures/sample.txt'))
 
       expect(sampleTxt).toHaveClass 'selected'
       expect(treeView.find('.selected').length).toBe 1
 
+    it "selected a file's parent dir if the file's entry is not visible", ->
+      # treeView.attachToDom()
+      rootView.open(require.resolve('fixtures/dir/a-dir/oh-git'))
+
+      dirView = treeView.root.find('.directory:contains(dir)').view()
+      expect(dirView).toHaveClass 'selected'
+
+      # dirView.expand()
+      # aDirView = dirView.find('.directory:contains(a-dir)').view()
+      # expect(aDirView).toHaveClass 'selected'
+
   describe "when a different editor becomes active", ->
     it "selects the file in that is open in that editor", ->
       sampleJs.click()

spec/spec-helper.coffee

@@ -15,7 +15,7 @@ beforeEach ->
   directoriesWithSubscriptions = []
 
 afterEach ->
-  $('#jasmine-content').empty()
+  # $('#jasmine-content').empty()
   document.title = defaultTitle
   ensureNoDirectorySubscriptions()
 

src/extensions/tree-view/tree-view.coffee

@@ -104,11 +104,15 @@ class TreeView extends View
     @selectEntryForPath(activeFilePath)
 
   selectEntryForPath: (path) ->
-    for element in @find(".entry")
-      view = $(element).view()
-      if view.getPath() == path
-        @selectEntry(view)
-        return
+    fn = (bestMatchEntry, element) ->
+      entry = $(element).view()
+      regex = new RegExp("^" + _.escapeRegExp(entry.getPath()))
+      if regex.test(path) and entry.getPath().length > bestMatchEntry.getPath().length
+        entry
+      else
+        bestMatchEntry
+
+    @selectEntry(@find(".entry").toArray().reduce(fn, @root))
 
   moveDown: ->
     selectedEntry = @selectedEntry()

src/stdlib/underscore-extensions.coffee

@@ -9,3 +9,39 @@ _.mixin
     sum = 0
     sum += elt for elt in array
     sum
+
+  escapeRegExp: (string) ->
+    # Referring to the table here:
+    # https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/regexp
+    # these characters should be escaped
+    # \ ^ $ * + ? . ( ) | { } [ ]
+    # These characters only have special meaning inside of brackets
+    # they do not need to be escaped, but they MAY be escaped
+    # without any adverse effects (to the best of my knowledge and casual testing)
+    # : ! , =
+    # my test "~!@#$%^&*(){}[]`/=?+\|-_;:'\",<.>".match(/[\#]/g)
+
+    specials = [
+      # order matters for these
+      "-"
+      "["
+      "]"
+      # order doesn't matter for any of these
+      "/"
+      "{"
+      "}"
+      "("
+      ")"
+      "*"
+      "+"
+      "?"
+      "."
+      "\\"
+      "^"
+      "$"
+      "|"]
+
+    # I choose to escape every character with '\'
+    # even though only some strictly require it when inside of []
+    regex = RegExp('[' + specials.join('\\') + ']', 'g')
+    string.replace(regex, "\\$&");