Move the value transfer into the event handlers

Before this commit, the work of moving the interim value out of the
`focus_field` and into the `search_field` and then clearing the
`focus_field` was split into separate places:

- `get_search_field_value` was doing the copying.
- and then we had to remember to clear the `focus_field`, if it existed, anytime we cleared the `search_field`

This commit moves all of that into one place, the event handlers where
the `focus_field` passes control back to the rest of Chosen.

Note: the `setTimeout`s are needed for the cut/paste events to make sure the
value being read from the `focus_field` happens after the events finish
changing the input's value.

coffee/chosen.jquery.coffee

@@ -107,11 +107,16 @@ class Chosen extends AbstractChosen
  @container.on 'click.chosen', (evt) -> evt.preventDefault(); return # gobble click of anchor
 
  @focus_field.on 'blur.chosen', (evt) => this.input_blur(evt); return
- @focus_field.on 'keyup.chosen', (evt) => this.keyup_checker(evt); return
- @focus_field.on 'keydown.chosen', (evt) => this.keydown_checker(evt); return
  @focus_field.on 'focus.chosen', (evt) => this.input_focus(evt); return
- @focus_field.on 'cut.chosen', (evt) => this.clipboard_event_checker(evt); return
- @focus_field.on 'paste.chosen', (evt) => this.clipboard_event_checker(evt); return
+
+ transfer_value = () =>
+ @search_field.val(@search_field.val() + @focus_field.val())
+ @focus_field.val('')
+
+ @focus_field.on 'keyup.chosen', (evt) => transfer_value(); this.keyup_checker(evt); return
+ @focus_field.on 'keydown.chosen', (evt) => transfer_value(); this.keydown_checker(evt); return
+ @focus_field.on 'cut.chosen', (evt) => setTimeout(transfer_value, 0); this.clipboard_event_checker(evt); return
+ @focus_field.on 'paste.chosen', (evt) => setTimeout(transfer_value, 0); this.clipboard_event_checker(evt); return
 
  destroy: ->
  $(@container[0].ownerDocument).off 'click.chosen', @click_test_action
@@ -256,7 +261,6 @@ class Chosen extends AbstractChosen
 
  @search_field.focus()
  @search_field.val this.get_search_field_value()
- @focus_field.val ""
 
  this.winnow_results()
  @form_field_jq.trigger("chosen:showing_dropdown", {chosen: this})
@@ -379,7 +383,6 @@ class Chosen extends AbstractChosen
  @form_field.options[item.options_index].selected = true
  @selected_option_count = null
  @search_field.val("")
- @focus_field.val("")
 
  if @is_multiple
  this.choice_build item
@@ -433,7 +436,7 @@ class Chosen extends AbstractChosen
  @selected_item.addClass("chosen-single-with-deselect")
 
  get_search_field_value: ->
- @search_field.val() + (@focus_field.val() || "")
+ @search_field.val()
 
  get_search_text: ->
  $.trim this.get_search_field_value()

coffee/chosen.proto.coffee

@@ -86,11 +86,16 @@ class @Chosen extends AbstractChosen
  @container.observe "click", (evt) => evt.preventDefault() # gobble click of anchor
 
  @focus_field.observe "blur", (evt) => this.input_blur(evt)
- @focus_field.observe "keyup", (evt) => this.keyup_checker(evt)
- @focus_field.observe "keydown", (evt) => this.keydown_checker(evt)
  @focus_field.observe "focus", (evt) => this.input_focus(evt)
- @focus_field.observe "cut", (evt) => this.clipboard_event_checker(evt)
- @focus_field.observe "paste", (evt) => this.clipboard_event_checker(evt)
+
+ transfer_value = () =>
+ @search_field.value = @search_field.value + @focus_field.value
+ @focus_field.value = ""
+
+ @focus_field.observe "keyup", (evt) => transfer_value(); this.keyup_checker(evt)
+ @focus_field.observe "keydown", (evt) => transfer_value(); this.keydown_checker(evt)
+ @focus_field.observe "cut", (evt) => setTimeout(transfer_value, 0); this.clipboard_event_checker(evt)
+ @focus_field.observe "paste", (evt) => setTimeout(transfer_value, 0); this.clipboard_event_checker(evt)
 
  destroy: ->
  @container.ownerDocument.stopObserving "click", @click_test_action
@@ -249,7 +254,6 @@ class @Chosen extends AbstractChosen
 
  @search_field.focus()
  @search_field.value = this.get_search_field_value()
- @focus_field?.value = ""
 
  this.winnow_results()
  @form_field.fire("chosen:showing_dropdown", {chosen: this})
@@ -372,7 +376,6 @@ class @Chosen extends AbstractChosen
  @form_field.options[item.options_index].selected = true
  @selected_option_count = null
  @search_field.value = ""
- @focus_field?.value = ""
 
  if @is_multiple
  this.choice_build item
@@ -425,7 +428,7 @@ class @Chosen extends AbstractChosen
  @selected_item.addClassName("chosen-single-with-deselect")
 
  get_search_field_value: ->
- @search_field.value + (@focus_field?.value || "")
+ @search_field.value
 
  get_search_text: ->
  this.get_search_field_value().strip()