WIP: Testing changes that cause lines to wrap

spec/atom/line-wrapper-spec.coffee

@@ -48,8 +48,9 @@ describe "LineWrapper", ->
         expect(screenLines[2].endColumn).toBe 65
         expect(_.pluck(screenLines[2], 'value').join('')).toBe 'right.push(current);'
 
-  fdescribe "when the buffer changes", ->
+  describe "when the buffer changes", ->
     changeHandler = null
+    longText = '0123456789ABCDEF'
 
     beforeEach ->
       changeHandler = jasmine.createSpy('changeHandler')
@@ -65,8 +66,25 @@ describe "LineWrapper", ->
           [event] = changeHandler.argsForCall[0]
           expect(event.oldRange).toEqual(new Range([0, 10], [0, 10]))
           expect(event.newRange).toEqual(new Range([0, 10], [0, 11]))
+          changeHandler.reset()
+
+          # below a wrapped line
+          buffer.insert([4, 10], 'foo')
+          expect(tokensText(wrapper.tokensForScreenRow(5))).toContain 'fooitems'
+          expect(changeHandler).toHaveBeenCalled()
+          [event] = changeHandler.argsForCall[0]
+          expect(event.oldRange).toEqual(new Range([5, 10], [5, 10]))
+          expect(event.newRange).toEqual(new Range([5, 10], [5, 13]))
+
 
       describe "when the update causes the line to wrap once", ->
+        fit "updates tokens for the corresponding screen lines and emits a change event", ->
+          buffer.insert([2, 4], longText)
+          expect(tokensText(wrapper.tokensForScreenRow(2))).toBe '    0123456789ABCDEFif (items.length <= 1) return '
+          expect(tokensText(wrapper.tokensForScreenRow(3))).toBe 'items;'
+          expect(tokensText(wrapper.tokensForScreenRow(4))).toBe '    var pivot = items.shift(), current, left = [], '
+
+          # LEFT OFF HERE: Test change event
 
       describe "when the update causes the line to wrap multiple times", ->
 

src/atom/line-wrapper.coffee

@@ -1,6 +1,7 @@
 _ = require 'underscore'
-Point = require 'point'
 EventEmitter = require 'event-emitter'
+Point = require 'point'
+Range = require 'range'
 
 getWordRegex = -> /\b[^\s]+/g
 
@@ -11,7 +12,9 @@ class LineWrapper
     @buildWrappedLines()
     @highlighter.on 'change', (e) =>
       @wrappedLines[e.oldRange.start.row] = @buildWrappedLineForBufferRow(e.newRange.start.row)
-      @trigger 'change', e
+      oldRange = @screenRangeFromBufferRange(e.oldRange)
+      newRange = @screenRangeFromBufferRange(e.newRange)
+      @trigger 'change', { oldRange, newRange }
 
   setMaxLength: (@maxLength) ->
     @buildWrappedLines()
@@ -58,6 +61,12 @@ class LineWrapper
 
     { screenLines }
 
+
+  screenRangeFromBufferRange: (bufferRange) ->
+    start = @screenPositionFromBufferPosition(bufferRange.start)
+    end = @screenPositionFromBufferPosition(bufferRange.end)
+    new Range(start,end)
+
   screenPositionFromBufferPosition: (bufferPosition) ->
     bufferPosition = Point.fromObject(bufferPosition)
     row = 0