Add keyBindingsForCommandMatchingElement to keymap

spec/keymap-spec.coffee

@@ -324,3 +324,26 @@ describe "Keymap", ->
         bindings = keymap.keyBindingsMatchingElement(fragment.find('.grandchild-node'))
         expect(bindings).toHaveLength 3
         expect(bindings[0].command).toEqual "command-and-grandchild-node"
+
+  describe ".keyBindingsForCommandMatchingElement(element)", ->
+    beforeEach ->
+      keymap.add 'nature',
+        '.green':
+          'ctrl-c': 'cultivate'
+        '.green-2':
+          'ctrl-o': 'cultivate'
+        '.brown':
+          'ctrl-h': 'harvest'
+        '.blue':
+          'ctrl-c': 'fly'
+
+    it "finds a keymap for an element", ->
+      el = $$ -> @div class: 'green'
+      bindings = keymap.keyBindingsForCommandMatchingElement('cultivate', el)
+      expect(bindings).toHaveLength 1
+      expect(bindings[0].keystroke).toEqual "ctrl-c"
+
+    it "no keymap an element without that map", ->
+      el = $$ -> @div class: 'brown'
+      bindings = keymap.keyBindingsForCommandMatchingElement('cultivate', el)
+      expect(bindings).toHaveLength 0

src/keymap.coffee

@@ -43,12 +43,29 @@ class Keymap
     keyBindings = @keyBindingsForKeystroke(keystroke)
     @keyBindingsMatchingElement(element, keyBindings)
 
+  # Public: Returns a array of {KeyBinding}s (sorted by selector specificity)
+  # that match a command.
+  #
+  # * command:
+  #   The string representing the command (tree-view:toggle)
+  # * element:
+  #   The DOM node that will match a {KeyBinding}'s selector.
+  keyBindingsForCommandMatchingElement: (command, element) ->
+    keyBindings = @keyBindingsForCommand(command)
+    @keyBindingsMatchingElement(element, keyBindings)
+
   # Public: Returns an array of {KeyBinding}s that match a keystroke
   # * keystroke:
   #   The string representing the keys pressed (e.g. ctrl-P)
   keyBindingsForKeystroke: (keystroke) ->
     keystroke = KeyBinding.normalizeKeystroke(keystroke)
-    keyBindings = @keyBindings.filter (keyBinding) -> keyBinding.matches(keystroke)
+    @keyBindings.filter (keyBinding) -> keyBinding.matches(keystroke)
+
+  # Public: Returns an array of {KeyBinding}s that match a command
+  # * keystroke:
+  #   The string representing the keys pressed (e.g. ctrl-P)
+  keyBindingsForCommand: (command) ->
+    @keyBindings.filter (keyBinding) -> keyBinding.command == command
 
   # Public: Returns a array of {KeyBinding}s (sorted by selector specificity)
   # whos selector matches the element.