Add save command and keyboard shortcuts to editor.

spec/atom/editor-spec.coffee

@@ -163,9 +163,6 @@ describe "Editor", ->
         expect(editor.gutter.find('.line-number:eq(3)').text()).toBe '4'
         expect(editor.gutter.find('.line-number:eq(4)').text()).toBe '7'
 
-
-
-
   describe "cursor movement", ->
     describe ".setCursorScreenPosition({row, column})", ->
       beforeEach ->
@@ -906,3 +903,49 @@ describe "Editor", ->
         expect(editor.lines.find('.line:eq(5)').text()).toBe '      current = items.shift();'
 
         expect(editor.getCursorBufferPosition()).toEqual [4, 29]
+
+  describe ".save()", ->
+    describe "when the current buffer has a path", ->
+      tempFilePath = null
+
+      beforeEach ->
+        tempFilePath = '/tmp/temp.txt'
+        expect(fs.remove(tempFilePath))
+        editor.setBuffer new Buffer(tempFilePath)
+        expect(editor.buffer.path).toBe tempFilePath
+
+      it "saves the current buffer to disk", ->
+        editor.buffer.setText 'Edited!'
+        expect(fs.exists(tempFilePath)).toBeFalsy()
+
+        editor.save()
+
+        expect(fs.exists(tempFilePath)).toBeTruthy()
+        expect(fs.read(tempFilePath)).toBe 'Edited!'
+
+    describe "when the current buffer has no path", ->
+      selectedFilePath = null
+      beforeEach ->
+        editor.setBuffer new Buffer()
+        expect(editor.buffer.path).toBeUndefined()
+        editor.buffer.setText 'Save me to a new path'
+        spyOn($native, 'saveDialog').andCallFake -> selectedFilePath
+
+      it "presents a 'save as' dialog", ->
+        editor.save()
+        expect($native.saveDialog).toHaveBeenCalled()
+
+      describe "when a path is chosen", ->
+        it "saves the buffer to the chosen path", ->
+          selectedFilePath = '/tmp/temp.txt'
+
+          editor.save()
+
+          expect(fs.exists(selectedFilePath)).toBeTruthy()
+          expect(fs.read(selectedFilePath)).toBe 'Save me to a new path'
+
+      describe "when dialog is cancelled", ->
+        it "does not save the buffer", ->
+          selectedFilePath = null
+          editor.save()
+          expect(fs.exists(selectedFilePath)).toBeFalsy()

src/atom/editor.coffee

@@ -46,6 +46,7 @@ class Editor extends View
 
   bindKeys: ->
     window.keymap.bindKeys '*:not(.editor *)',
+      'meta-s': 'save'
       right: 'move-right'
       left: 'move-left'
       down: 'move-down'
@@ -56,7 +57,7 @@ class Editor extends View
       'shift-down': 'select-down'
       enter: 'newline'
       backspace: 'backspace'
-      delete: 'delete'
+      'delete': 'delete'
       'meta-x': 'cut'
       'meta-c': 'copy'
       'meta-v': 'paste'
@@ -65,6 +66,7 @@ class Editor extends View
       'alt-meta-w': 'toggle-soft-wrap'
       'alt-meta-f': 'fold-selection'
 
+    @on 'save', => @save()
     @on 'move-right', => @moveCursorRight()
     @on 'move-left', => @moveCursorLeft()
     @on 'move-down', => @moveCursorDown()
@@ -237,6 +239,13 @@ class Editor extends View
       @removeClass 'soft-wrap'
       $(window).off 'resize', @_setMaxLineLength
 
+  save: ->
+    if not @buffer.path
+      path = $native.saveDialog()
+      return if not path
+      @buffer.path = path
+
+    @buffer.save()
 
   clipScreenPosition: (screenPosition, options={}) ->
     @renderer.clipScreenPosition(screenPosition, options)