Support outdenting when indent is < 1 tab length

spec/app/edit-session-spec.coffee

@@ -1291,6 +1291,27 @@ describe "EditSession", ->
           expect(buffer.lineForRow(1)).toBe "var sort = function(items) {"
           expect(editSession.getSelectedBufferRange()).toEqual [[1, 3 - editSession.tabLength], [1, 3 - editSession.tabLength]]
 
+        it "outdents when indent is less than a tab length", ->
+          editSession.insertText(' ')
+          editSession.outdentSelectedRows()
+          expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
+
+        it "outdents a single hard tab when indent is multiple hard tabs and and the session is using soft tabs", ->
+          editSession.insertText('\t\t')
+          editSession.outdentSelectedRows()
+          expect(buffer.lineForRow(0)).toBe "\tvar quicksort = function () {"
+          editSession.outdentSelectedRows()
+          expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
+
+        it "outdents when a mix of hard tabs and soft tabs are used", ->
+          editSession.insertText('\t   ')
+          editSession.outdentSelectedRows()
+          expect(buffer.lineForRow(0)).toBe "   var quicksort = function () {"
+          editSession.outdentSelectedRows()
+          expect(buffer.lineForRow(0)).toBe " var quicksort = function () {"
+          editSession.outdentSelectedRows()
+          expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
+
       describe "when one line is selected", ->
         it "outdents line and retains editSession", ->
           editSession.setSelectedBufferRange([[1,4], [1,14]])

src/app/edit-session.coffee

@@ -108,6 +108,7 @@ class EditSession
   setSoftWrap: (@softWrap) ->
 
   getTabText: -> new Array(@tabLength + 1).join(" ")
+  getTabLength: -> @tabLength
 
   clipBufferPosition: (bufferPosition) ->
     @buffer.clipPosition(bufferPosition)

src/app/selection.coffee

@@ -213,10 +213,10 @@ class Selection
   outdentSelectedRows: ->
     range = @getBufferRange()
     buffer = @editSession.buffer
-    leadingTabRegex = new RegExp("^#{@editSession.getTabText()}")
+    leadingTabRegex = new RegExp("^ {1,#{@editSession.getTabLength()}}|\t")
     for row in [range.start.row..range.end.row]
-      if leadingTabRegex.test buffer.lineForRow(row)
-        buffer.delete [[row, 0], [row, @editSession.tabLength]]
+      if matchLength = buffer.lineForRow(row).match(leadingTabRegex)?[0].length
+        buffer.delete [[row, 0], [row, matchLength]]
 
   toggleLineComments: ->
     @modifySelection =>