Add lineText and lineTextOffset to buffer.scan

spec/text-buffer-spec.coffee

@@ -602,6 +602,17 @@ describe 'TextBuffer', ->
       it "clips the range to the end of the buffer", ->
         expect(buffer.getTextInRange([[12], [13, Infinity]])).toBe buffer.lineForRow(12)
 
+  describe ".scan(regex, fn)", ->
+    it "retunrns lineText and lineTextOffset", ->
+      matches = []
+      buffer.scan /current/, (match) ->
+        matches.push(match)
+      expect(matches.length).toBe 1
+
+      expect(matches[0].matchText).toEqual 'current'
+      expect(matches[0].lineText).toEqual '    var pivot = items.shift(), current, left = [], right = [];'
+      expect(matches[0].lineTextOffset).toBe 0
+
   describe ".scanInRange(range, regex, fn)", ->
     describe "when given a regex with a ignore case flag", ->
       it "does a case-insensitive search", ->

src/text-buffer.coffee

@@ -6,6 +6,7 @@ File = require './file'
 EventEmitter = require './event-emitter'
 Subscriber = require './subscriber'
 guid = require 'guid'
+{P} = require 'scandal'
 
 # Private: Represents the contents of a file.
 #
@@ -501,7 +502,10 @@ class TextBuffer
   # regex - A {RegExp} representing the text to find
   # iterator - A {Function} that's called on each match
   scan: (regex, iterator) ->
-    @scanInRange(regex, @getRange(), iterator)
+    @scanInRange regex, @getRange(), (result) =>
+      result.lineText = @lineForRow(result.range.start.row)
+      result.lineTextOffset = 0
+      iterator(result)
 
   # Scans for text in a given range, calling a function on each match.
   #
@@ -538,7 +542,8 @@ class TextBuffer
       range = new Range(startPosition, endPosition)
       keepLooping = true
       replacementText = null
-      iterator({match, range, stop, replace })
+      matchText = match[0]
+      iterator({ match, matchText, range, stop, replace })
 
       if replacementText?
         @change(range, replacementText)