Add delete line support bound to meta-d key

src/app/buffer.coffee

@@ -162,13 +162,19 @@ class Buffer
     new Point(row, index)
 
   deleteRow: (row) ->
-    range = null
-    if row == @getLastRow()
-      range = new Range([row - 1, @lineLengthForRow(row - 1)], [row, @lineLengthForRow(row)])
-    else
-      range = new Range([row, 0], [row + 1, 0])
+    @deleteRows(row, row)
 
-    @change(range, '')
+  deleteRows: (start, end) ->
+    startPoint = null
+    endPoint = null
+    if end == @getLastRow()
+      startPoint = [start - 1, @lineLengthForRow(start - 1)]
+      endPoint = [end, @lineLengthForRow(end)]
+    else
+      startPoint = [start, 0]
+      endPoint = [end + 1, 0]
+
+    @change(new Range(startPoint, endPoint), '')
 
   insert: (point, text) ->
     @change(new Range(point, point), text)

src/app/edit-session.coffee

@@ -167,6 +167,9 @@ class EditSession
   deleteToEndOfWord: ->
     @mutateSelectedText (selection) -> selection.deleteToEndOfWord()
 
+  deleteLine: ->
+    @mutateSelectedText (selection) -> selection.deleteLine()
+
   indentSelectedRows: ->
     @mutateSelectedText (selection) -> selection.indentSelectedRows()
 

src/app/editor.coffee

@@ -111,6 +111,7 @@ class Editor extends View
       'backspace-to-beginning-of-word': @backspaceToBeginningOfWord
       'delete': @delete
       'delete-to-end-of-word': @deleteToEndOfWord
+      'delete-line': @deleteLine
       'cut-to-end-of-line': @cutToEndOfLine
       'cut': @cutSelection
       'copy': @copySelection
@@ -209,6 +210,7 @@ class Editor extends View
   backspaceToBeginningOfWord: -> @activeEditSession.backspaceToBeginningOfWord()
   delete: -> @activeEditSession.delete()
   deleteToEndOfWord: -> @activeEditSession.deleteToEndOfWord()
+  deleteLine: -> @activeEditSession.deleteLine()
   cutToEndOfLine: -> @activeEditSession.cutToEndOfLine()
   insertText: (text) -> @activeEditSession.insertText(text)
   insertNewline: -> @activeEditSession.insertNewline()

src/app/keymaps/editor.coffee

@@ -11,6 +11,7 @@ window.keymap.bindKeys '.editor',
   'backspace': 'backspace'
   'shift-backspace': 'backspace'
   'delete': 'delete'
+  'meta-d': 'delete-line'
   'meta-x': 'cut'
   'meta-c': 'copy'
   'meta-v': 'paste'

src/app/selection.coffee

@@ -181,6 +181,17 @@ class Selection
       @editSession.buffer.delete(bufferRange) unless bufferRange.isEmpty()
       @cursor?.setBufferPosition(bufferRange.start)
 
+  deleteLine: ->
+    if @isEmpty()
+      @editSession.buffer.deleteRow(@cursor.getBufferPosition().row)
+    else
+      bufferRange = @getBufferRange()
+      start = bufferRange.start.row
+      end = bufferRange.end.row
+      if end isnt @editSession.buffer.getLastRow() and bufferRange.end.column is 0
+        end--
+      @editSession.buffer.deleteRows(start, end)
+
   indentSelectedRows: ->
     range = @getBufferRange()
     for row in [range.start.row..range.end.row]