Add $ address to command interpreter

spec/atom/command-interpreter-spec.coffee

@@ -21,6 +21,14 @@ describe "CommandInterpreter", ->
         interpreter.eval(editor, '4,7')
         expect(editor.selection.getBufferRange()).toEqual [[3, 0], [7, 0]]
 
+    describe "$", ->
+      it "selects EOF", ->
+        interpreter.eval(editor, '$')
+        expect(editor.selection.getBufferRange()).toEqual [[12,2], [12,2]]
+
+        interpreter.eval(editor, '1,$')
+        expect(editor.selection.getBufferRange()).toEqual [[0,0], [12,2]]
+
   describe "substitution", ->
     it "does nothing if there are no matches", ->
       editor.selection.setBufferRange([[6, 0], [6, 44]])

src/atom/command-interpreter/address-range.coffee

@@ -5,5 +5,5 @@ module.exports =
 class AddressRange extends Address
   constructor: (@startAddress, @endAddress) ->
 
-  getRange: ->
-    new Range(@startAddress.getRange().start, @endAddress.getRange().end)
+  getRange: (editor) ->
+    new Range(@startAddress.getRange(editor).start, @endAddress.getRange(editor).end)

src/atom/command-interpreter/address.coffee

@@ -1,4 +1,4 @@
 module.exports =
 class Address
   execute: (editor) ->
-    editor.getSelection().setBufferRange(@getRange())
+    editor.getSelection().setBufferRange(@getRange(editor))

src/atom/command-interpreter/eof-address.coffee

@@ -0,0 +1,9 @@
+Address = require 'command-interpreter/address'
+Range = require 'range'
+
+module.exports =
+class EofAddress extends Address
+  getRange: (editor) ->
+    lastRow = editor.getLastBufferRow()
+    column = editor.getBufferLineLength(lastRow)
+    new Range([lastRow, column], [lastRow, column])

src/atom/commands.pegjs

@@ -2,6 +2,7 @@
   var Substitution = require('command-interpreter/substitution');
   var LineAddress = require('command-interpreter/line-address');
   var AddressRange = require('command-interpreter/address-range');
+  var EofAddress = require('command-interpreter/eof-address');
 }
 
 start
@@ -19,6 +20,7 @@ addressRange
 
 primitiveAddress
   = lineNumber:integer { return new LineAddress(lineNumber) }
+  / '$' { return new EofAddress() }
 
 substitution
   = "s" _ "/" find:pattern "/" replace:pattern "/" _ options:[g]* {

src/atom/editor.coffee

@@ -341,7 +341,6 @@ class Editor extends View
     @lineHeight = fragment.outerHeight()
     fragment.remove()
 
-
   getCursor: -> @cursor
   moveCursorUp: -> @cursor.moveUp()
   moveCursorDown: -> @cursor.moveDown()
@@ -373,6 +372,8 @@ class Editor extends View
 
   setText: (text) -> @buffer.setText(text)
   getText: -> @buffer.getText()
+  getLastBufferRow: -> @buffer.lastRow()
+  getBufferLineLength: (row) -> @buffer.getLineLength(row)
 
   insertText: (text) ->
     { text, shouldOutdent } = @autoIndentText(text)