Wrap line at boundary if it includes a CJK character

spec/display-buffer-spec.coffee

@@ -130,6 +130,12 @@ describe "DisplayBuffer", ->
             expect(displayBuffer.tokenizedLineForScreenRow(10).text).toBe '    return '
             expect(displayBuffer.tokenizedLineForScreenRow(11).text).toBe '    sort(left).concat(pivot).concat(sort(right));'
 
+          it "wraps the line at the boundary if it includes a CJK character", ->
+            buffer.setTextInRange([[0, 0], [1, 0]], 'abcd efg유私ﾌ业余爱\n')
+            displayBuffer.setEditorWidthInChars(10)
+            expect(displayBuffer.tokenizedLineForScreenRow(0).text).toBe 'abcd efg유私'
+            expect(displayBuffer.tokenizedLineForScreenRow(1).text).toBe 'ﾌ业余爱'
+
         describe "when there is no whitespace before the boundary", ->
           it "wraps the line exactly at the boundary since there's no more graceful place to wrap it", ->
             buffer.setTextInRange([[0, 0], [1, 0]], 'abcdefghijklmnopqrstuvwxyz\n')

src/tokenized-line.coffee

@@ -1,5 +1,5 @@
 _ = require 'underscore-plus'
-{isPairedCharacter} = require './text-utils'
+{isPairedCharacter, isCjkCharacter} = require './text-utils'
 Token = require './token'
 {SoftTab, HardTab, PairedCharacter, SoftWrapIndent} = require './special-token-symbols'
 
@@ -321,8 +321,11 @@ class TokenizedLine
     return unless maxColumn?
     return unless @text.length > maxColumn
 
-    if /\s/.test(@text[maxColumn])
-       # search forward for the start of a word past the boundary
+    if isCjkCharacter(@text[maxColumn])
+      # always wrap when a CJK character is at the wrap boundary
+      return maxColumn
+    else if /\s/.test(@text[maxColumn])
+      # search forward for the start of a word past the boundary
       for column in [maxColumn..@text.length]
         return column if /\S/.test(@text[column])