Add Editor::splitSelectionIntoLines

spec/editor-spec.coffee

@@ -1181,6 +1181,27 @@ describe "Editor", ->
               [[10, 0], [10, 0]]
             ]
 
+      describe ".splitSelectionIntoLines()", ->
+        it "splits all multi-line selections into one selection per line", ->
+          editor.setSelectedBufferRange([[0, 3], [2, 4]])
+          editor.splitSelectionIntoLines()
+          expect(editor.getSelectedBufferRanges()).toEqual [
+            [[0, 3], [0, 29]]
+            [[1, 0], [1, 30]]
+            [[2, 0], [2, 4]]
+          ]
+
+          editor.setSelectedBufferRange([[0, 3], [1, 10]])
+          editor.splitSelectionIntoLines()
+          expect(editor.getSelectedBufferRanges()).toEqual [
+            [[0, 3], [0, 29]]
+            [[1, 0], [1, 10]]
+          ]
+
+          editor.setSelectedBufferRange([[0, 0], [0, 3]])
+          editor.splitSelectionIntoLines()
+          expect(editor.getSelectedBufferRanges()).toEqual [[[0, 0], [0, 3]]]
+
       describe ".consolidateSelections()", ->
         it "destroys all selections but the most recent, returning true if any selections were destroyed", ->
           editor.setSelectedBufferRange([[3, 16], [3, 21]])

src/editor-view.coffee

@@ -183,6 +183,7 @@ class EditorView extends View
         'editor:newline-above': @insertNewlineAbove
         'editor:add-selection-below': @addSelectionBelow
         'editor:add-selection-above': @addSelectionAbove
+        'editor:split-selection-into-lines': @splitSelectionIntoLines
         'editor:toggle-soft-tabs': @toggleSoftTabs
         'editor:toggle-soft-wrap': @toggleSoftWrap
         'editor:fold-all': @foldAll
@@ -375,6 +376,9 @@ class EditorView extends View
   # {Delegates to: Editor.addSelectionAbove}
   addSelectionAbove: -> @editor.addSelectionAbove()
 
+  # {Delegates to: Editor.splitSelectionIntoLines}
+  splitSelectionIntoLines: -> @editor.splitSelectionIntoLines()
+
   # {Delegates to: Editor.selectToBeginningOfWord}
   selectToBeginningOfWord: -> @editor.selectToBeginningOfWord()
 

src/editor.coffee

@@ -1190,6 +1190,26 @@ class Editor extends Model
   addSelectionAbove: ->
     @expandSelectionsBackward (selection) => selection.addSelectionAbove()
 
+  # Public: Split any multi-line selections into one selection per line.
+  #
+  # This method breaks apart multi-line selections by adding new selections
+  # that select the entire line for all completely selected lines and leaves
+  # any partially selected lines at the start and end of the selection as-is.
+  #
+  # This method will not affect any single line selections.
+  splitSelectionIntoLines: ->
+    for selection in @getSelections()
+      range = selection.getBufferRange()
+      continue if range.isSingleLine()
+
+      selection.destroy()
+      {start, end} = range
+      @addSelectionForBufferRange([start, [start.row, Infinity]])
+      {row} = start
+      while ++row < end.row
+        @addSelectionForBufferRange([[row, 0], [row, Infinity]])
+      @addSelectionForBufferRange([[end.row, 0], [end.row, end.column]])
+
   # Public: Transposes the current text selections.
   #
   # The text in each selection is reversed so `abcd` would become `dcba`. The