WIP: Can place multiple cursors and insert text without newlines. Very broken.

spec/atom/editor-spec.coffee

@@ -756,6 +756,27 @@ describe "Editor", ->
         expect(range.end).toEqual({row: 5, column: 27})
         expect(editor.getCursorScreenPosition()).toEqual(row: 5, column: 27)
 
+  describe "multiple cursor placement", ->
+    fit "places multiple cursor with meta-click", ->
+      editor.attachToDom()
+      editor.lines.trigger mousedownEvent(editor: editor, point: [3, 0])
+      editor.lines.trigger mousedownEvent(editor: editor, point: [6, 0], metaKey: true)
+
+      [cursor1, cursor2] = editor.find('.cursor').map -> $(this).view()
+      expect(cursor1.position()).toEqual(top: 3 * editor.lineHeight, left: 0)
+      expect(cursor1.getBufferPosition()).toEqual [3, 0]
+      expect(cursor2.position()).toEqual(top: 6 * editor.lineHeight, left: 0)
+      expect(cursor2.getBufferPosition()).toEqual [6, 0]
+
+    fit "inserts text for all cursors", ->
+      editor.setCursorScreenPosition([3, 0])
+      editor.addCursorAtScreenPosition([6, 0])
+
+      editor.insertText("abc")
+
+      expect(editor.lineForBufferRow(3)).toBe "abc    var pivot = items.shift(), current, left = [], right = [];"
+      expect(editor.lineForBufferRow(6)).toBe "abc      current < pivot ? left.push(current) : right.push(current);"
+
   describe "buffer manipulation", ->
     describe "when text input events are triggered on the hidden input element", ->
       describe "when there is no selection", ->

src/atom/composite-cursor.coffee

@@ -0,0 +1,30 @@
+Cursor = require 'cursor'
+
+module.exports =
+class CompositeCursor
+  constructor: (@editor) ->
+    @cursors = []
+    @addCursor()
+
+  getCursors: ->
+    @cursors
+
+  addCursor: ->
+    cursor = new Cursor(@editor)
+    @cursors.push(cursor)
+    @editor.lines.append(cursor)
+    @editor.addSelectionForCursor(cursor)
+    cursor
+
+  addCursorAtScreenPosition: (screenPosition) ->
+    cursor = @addCursor()
+    cursor.setScreenPosition(screenPosition)
+
+  setScreenPosition: (screenPosition) ->
+    cursor.setScreenPosition(screenPosition) for cursor in @cursors
+
+  getScreenPosition: ->
+    @cursors[0].getScreenPosition()
+
+  handleBufferChange: (e) ->
+    cursor.handleBufferChange(e) for cursor in @cursors

src/atom/composite-selection.coffee

@@ -0,0 +1,14 @@
+Selection = require 'selection'
+
+module.exports =
+class CompositeSeleciton
+  constructor: (@editor) ->
+    @selections = []
+
+  addSelectionForCursor: (cursor) ->
+    selection = new Selection({@editor, cursor})
+    @selections.push(selection)
+    @editor.lines.append(selection)
+
+  insertText: (text) ->
+    selection.insertText(text) for selection in @selections

src/atom/cursor.coffee

@@ -12,10 +12,14 @@ class Cursor extends View
   bufferPosition: null
 
   initialize: (@editor) ->
+    @screenPosition = new Point(0, 0)
     @one 'attach', => @updateAppearance()
 
-  bufferChanged: (e) ->
-    @setBufferPosition(e.newRange.end)
+  handleBufferChange: (e) ->
+    { newRange, oldRange } = e
+    if oldRange.end.row == newRange.end.row == @getBufferPosition().row
+      delta = newRange.end.subtract(oldRange.end)
+      @setBufferPosition(@getBufferPosition().add(delta))
 
   setScreenPosition: (position, options={}) ->
     position = Point.fromObject(position)

src/atom/editor.coffee

@@ -1,12 +1,12 @@
 {View, $$} = require 'space-pen'
 AceOutdentAdaptor = require 'ace-outdent-adaptor'
 Buffer = require 'buffer'
-Cursor = require 'cursor'
+CompositeCursor = require 'composite-cursor'
+CompositeSelection = require 'composite-selection'
 Gutter = require 'gutter'
 Renderer = require 'renderer'
 Point = require 'point'
 Range = require 'range'
-Selection = require 'selection'
 EditSession = require 'edit-session'
 
 $ = require 'jquery'
@@ -102,11 +102,14 @@ class Editor extends View
     @on 'close', => @remove(); false
 
   buildCursorAndSelection: ->
-    @cursor = new Cursor(this)
-    @lines.append(@cursor)
+    @compositeSelection = new CompositeSelection(this)
+    @compositeCursor = new CompositeCursor(this)
 
-    @selection = new Selection(this)
-    @lines.append(@selection)
+  addCursorAtScreenPosition: (screenPosition) ->
+    @compositeCursor.addCursorAtScreenPosition(screenPosition)
+
+  addSelectionForCursor: (cursor) ->
+    @compositeSelection.addSelectionForCursor(cursor)
 
   handleEvents: ->
     @on 'focus', =>
@@ -130,7 +133,11 @@ class Editor extends View
       clickCount = e.originalEvent.detail
 
       if clickCount == 1
-        @setCursorScreenPosition @screenPositionFromMouseEvent(e)
+        screenPosition = @screenPositionFromMouseEvent(e)
+        if e.metaKey
+          @addCursorAtScreenPosition(screenPosition)
+        else
+          @setCursorScreenPosition(screenPosition)
       else if clickCount == 2
         @selection.selectWord()
       else if clickCount >= 3
@@ -142,7 +149,7 @@ class Editor extends View
       @insertText(e.originalEvent.data)
 
     @on 'cursor:position-changed', =>
-      position = @pixelPositionForScreenPosition(@cursor.getScreenPosition())
+      position = @pixelPositionForScreenPosition(@getCursorScreenPosition())
       if @softWrap
         position.left = Math.min(position.left, @horizontalScroller.width() - @charWidth)
       @hiddenInput.css(position)
@@ -213,7 +220,7 @@ class Editor extends View
     @editSession.scrollLeft = @horizontalScroller.scrollLeft()
 
   handleBufferChange: (e) ->
-    @cursor.bufferChanged(e) if @isFocused
+    @compositeCursor.handleBufferChange(e) if @isFocused
 
   handleRendererChange: (e) ->
     { oldRange, newRange } = e
@@ -349,8 +356,8 @@ class Editor extends View
 
   getCurrentScreenLine: -> @buffer.lineForRow(@getCursorScreenRow())
   getCurrentBufferLine: -> @buffer.lineForRow(@getCursorBufferRow())
-  setCursorScreenPosition: (position) -> @cursor.setScreenPosition(position)
-  getCursorScreenPosition: -> @cursor.getScreenPosition()
+  setCursorScreenPosition: (position) -> @compositeCursor.setScreenPosition(position)
+  getCursorScreenPosition: -> @compositeCursor.getScreenPosition()
   setCursorBufferPosition: (position) -> @cursor.setBufferPosition(position)
   getCursorBufferPosition: -> @cursor.getBufferPosition()
   setCursorScreenRow: (row) -> @cursor.setScreenRow(row)
@@ -376,11 +383,12 @@ class Editor extends View
   getBufferLineLength: (row) -> @buffer.getLineLength(row)
   getTextInRange: (range) -> @buffer.getTextInRange(range)
   getEofPosition: -> @buffer.getEofPosition()
+  lineForBufferRow: (row) -> @buffer.lineForRow(row)
 
   insertText: (text) ->
-    { text, shouldOutdent } = @autoIndentText(text)
-    @selection.insertText(text)
-    @autoOutdentText() if shouldOutdent
+    # { text, shouldOutdent } = @autoIndentText(text)
+    @compositeSelection.insertText(text)
+    # @autoOutdentText() if shouldOutdent
 
   autoIndentText: (text) ->
     if @autoIndent

src/atom/selection.coffee

@@ -12,9 +12,8 @@ class Selection extends View
   modifyingSelection: null
   regions: null
 
-  initialize: (@editor) ->
+  initialize: ({@editor, @cursor}) ->
     @regions = []
-    @cursor = @editor.cursor
     @cursor.on 'cursor:position-changed', =>
       if @modifyingSelection
         @updateAppearance()