Use LineWrapper to calculate pixelPositionFromPoint

spec/atom/editor-spec.coffee

@@ -50,7 +50,7 @@ describe "Editor", ->
         buffer.insert([1,0], "/*")
         expect(editor.lines.find('.line:eq(2) span:eq(0)')).toMatchSelector '.comment'
 
-    describe "when soft-wrap is enabled", ->
+    fdescribe "when soft-wrap is enabled", ->
       beforeEach ->
         editor.attachToDom()
         editor.width(editor.charWidth * 50)
@@ -60,7 +60,7 @@ describe "Editor", ->
         expect(editor.lines.find('pre:eq(3)').text()).toBe "    var pivot = items.shift(), current, left = [], "
         expect(editor.lines.find('pre:eq(4)').text()).toBe "right = [];"
 
-        editor.cursor.setPosition([3, 52])
+        editor.cursor.setPosition([3, 51])
         expect(editor.cursor.position()).toEqual(editor.lines.find('pre:eq(4)').position())
 
         editor.cursor.setPosition([4, 0])

src/atom/editor.coffee

@@ -191,18 +191,9 @@ class Editor extends View
 
     new Point(row, column)
 
-  pixelPositionFromPoint: ({row, column}) ->
-    segmentsAbove = 0
-    segmentsAbove += @lineWrapper.segmentsForRow(i).length for i in [0...row]
-
-    for segment in @lineWrapper.segmentsForRow(row)
-      if column > segment.lastIndex
-        segmentsAbove++
-        column -= segment.textLength
-      else
-        break
-
-    { top: segmentsAbove * @lineHeight, left: column * @charWidth }
+  pixelPositionFromPoint: (position) ->
+    { row, column } = @lineWrapper.displayPositionFromBufferPosition(position)
+    { top: row * @lineHeight, left: column * @charWidth }
 
   pointFromPixelPosition: ({top, left}) ->
     { row: Math.floor(top / @lineHeight), column: Math.floor(left / @charWidth) }