Add move-to-end-of-word and move-to-beginning-of-word.

Buffer.traverseRegexMatchesInRange matches text that at end of range, even if the match could have exceeded end of the range.

src/atom/buffer.coffee

@@ -154,9 +154,15 @@ class Buffer
 
       matchLength = match[0].length
       matchStartIndex = match.index
-      matchEndIndex = match.index + matchLength
+      matchEndIndex = matchStartIndex + matchLength
 
-      return if matchEndIndex > endIndex
+      if matchEndIndex > endIndex
+        regex.lastIndex = 0
+        if matchStartIndex < endIndex and match = regex.exec(text[matchStartIndex..endIndex])
+          matchLength = match[0].length
+          matchEndIndex = matchStartIndex + matchLength
+        else
+          return
 
       startPosition = @positionForCharacterIndex(matchStartIndex + lengthDelta)
       endPosition = @positionForCharacterIndex(matchEndIndex + lengthDelta)

src/atom/composite-cursor.coffee

@@ -60,8 +60,11 @@ class CompositeCursor
   moveToNextWord: ->
     @modifyCursors (cursor) -> cursor.moveToNextWord()
 
-  moveToPreviousWord: ->
-    @modifyCursors (cursor) -> cursor.moveToPreviousWord()
+  moveToBeginningOfWord: ->
+    @modifyCursors (cursor) -> cursor.moveToBeginningOfWord()
+
+  moveToEndOfWord: ->
+    @modifyCursors (cursor) -> cursor.moveToEndOfWord()
 
   moveToTop: ->
     @modifyCursors (cursor) -> cursor.moveToTop()

src/atom/cursor.coffee

@@ -117,16 +117,20 @@ class Cursor extends View
 
     @setBufferPosition(nextPosition or @editor.getEofPosition())
 
-  moveToPreviousWord: ->
+  moveToBeginningOfWord: ->
     bufferPosition = @getBufferPosition()
-    range = [[0, 0], bufferPosition]
-
-    nextPosition = null
+    range = [[0,0], bufferPosition]
     @editor.backwardsTraverseRegexMatchesInRange @wordRegex, range, (match, matchRange, { stop }) =>
-      nextPosition = matchRange.start
+      @setBufferPosition matchRange.start
       stop()
 
-    @setBufferPosition(nextPosition or [0, 0])
+  moveToEndOfWord: ->
+    bufferPosition = @getBufferPosition()
+    range = [bufferPosition, @editor.getEofPosition()]
+
+    @editor.traverseRegexMatchesInRange @wordRegex, range, (match, matchRange, { stop }) =>
+      @setBufferPosition matchRange.end
+      stop()
 
   moveToEndOfLine: ->
     { row } = @getBufferPosition()

src/atom/editor.coffee

@@ -110,6 +110,8 @@ class Editor extends View
     @on 'move-to-beginning-of-line', => @moveCursorToBeginningOfLine()
     @on 'move-to-end-of-line', => @moveCursorToEndOfLine()
     @on 'move-to-first-character-of-line', => @moveCursorToFirstCharacterOfLine()
+    @on 'move-to-beginning-of-word', => @moveCursorToBeginningOfWord()
+    @on 'move-to-end-of-word', => @moveCursorToEndOfWord()
     @on 'select-to-top', => @selectToTop()
     @on 'select-to-bottom', => @selectToBottom()
     @on 'select-to-end-of-line', => @selectToEndOfLine()
@@ -369,7 +371,8 @@ class Editor extends View
   moveCursorRight: -> @compositeCursor.moveRight()
   moveCursorLeft: -> @compositeCursor.moveLeft()
   moveCursorToNextWord: -> @compositeCursor.moveToNextWord()
-  moveCursorToPreviousWord: -> @compositeCursor.moveToPreviousWord()
+  moveCursorToBeginningOfWord: -> @compositeCursor.moveToBeginningOfWord()
+  moveCursorToEndOfWord: -> @compositeCursor.moveToEndOfWord()
   moveCursorToTop: -> @compositeCursor.moveToTop()
   moveCursorToBottom: -> @compositeCursor.moveToBottom()
   moveCursorToBeginningOfLine: -> @compositeCursor.moveToBeginningOfLine()

src/atom/keybindings/apple.coffee

@@ -4,4 +4,6 @@ window.keymap.bindKeys '.editor'
   'meta-down': 'move-to-bottom'
   'meta-shift-down': 'select-to-bottom'
   'meta-right': 'move-to-end-of-line'
-  'meta-left': 'move-to-beginning-of-line'
+  'meta-left': 'move-to-beginning-of-line'
+  'alt-left': 'move-to-beginning-of-word'
+  'alt-right': 'move-to-end-of-word'

src/atom/keybindings/emacs.coffee

@@ -3,8 +3,8 @@ window.keymap.bindKeys '.editor',
   'ctrl-b': 'move-left'
   'ctrl-p': 'move-up'
   'ctrl-n': 'move-down'
-  'alt-f': 'move-to-next-word'
-  'alt-b': 'move-to-previous-word'
+  'alt-f': 'move-to-end-of-word'
+  'alt-b': 'move-to-beginning-of-word'
   'ctrl-a': 'move-to-first-character-of-line'
   'ctrl-e': 'move-to-end-of-line'
   'ctrl-h': 'backspace'