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framework/admin/thirdparty/chosen/coffee/chosen.proto.coffee 20.4 KB
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  ###
  Chosen source: generate output using 'cake build'
  Copyright (c) 2011 by Harvest
  ###
  root = this
  
  class Chosen extends AbstractChosen
  
    setup: ->
      @current_value = @form_field.value
      @is_rtl = @form_field.hasClassName "chzn-rtl"
  
    finish_setup: ->
      @form_field.addClassName "chzn-done"
  
    set_default_values: ->
      super()
      
      # HTML Templates
      @single_temp = new Template('<a href="javascript:void(0)" class="chzn-single chzn-default" tabindex="-1"><span>#{default}</span><div><b></b></div></a><div class="chzn-drop" style="left:-9000px;"><div class="chzn-search"><input type="text" autocomplete="off" /></div><ul class="chzn-results"></ul></div>')
      @multi_temp = new Template('<ul class="chzn-choices"><li class="search-field"><input type="text" value="#{default}" class="default" autocomplete="off" style="width:25px;" /></li></ul><div class="chzn-drop" style="left:-9000px;"><ul class="chzn-results"></ul></div>')
      @choice_temp = new Template('<li class="search-choice" id="#{id}"><span>#{choice}</span><a href="javascript:void(0)" class="search-choice-close" rel="#{position}"></a></li>')
      @choice_noclose_temp = new Template('<li class="search-choice search-choice-disabled" id="#{id}"><span>#{choice}</span></li>')
      @no_results_temp = new Template('<li class="no-results">' + @results_none_found + ' "<span>#{terms}</span>"</li>')
  
    set_up_html: ->
      @container_id = @form_field.identify().replace(/[^\w]/g, '_') + "_chzn"
      
      @f_width = if @form_field.getStyle("width") then parseInt @form_field.getStyle("width"), 10 else @form_field.getWidth()
      
      container_props =
        'id': @container_id
        'class': "chzn-container#{ if @is_rtl then ' chzn-rtl' else '' }"
        'style': 'width: ' + (@f_width) + 'px' #use parens around @f_width so coffeescript doesn't think + ' px' is a function parameter
      
      base_template = if @is_multiple then new Element('div', container_props).update( @multi_temp.evaluate({ "default": @default_text}) ) else new Element('div', container_props).update( @single_temp.evaluate({ "default":@default_text }) )
  
      @form_field.hide().insert({ after: base_template })
      @container = $(@container_id)
      @container.addClassName( "chzn-container-" + (if @is_multiple then "multi" else "single") )
      @dropdown = @container.down('div.chzn-drop')
      
      dd_top = @container.getHeight()
      dd_width = (@f_width - get_side_border_padding(@dropdown))
      
      @dropdown.setStyle({"width": dd_width  + "px", "top": dd_top + "px"})
  
      @search_field = @container.down('input')
      @search_results = @container.down('ul.chzn-results')
      this.search_field_scale()
  
      @search_no_results = @container.down('li.no-results')
      
      if @is_multiple
        @search_choices = @container.down('ul.chzn-choices')
        @search_container = @container.down('li.search-field')
      else
        @search_container = @container.down('div.chzn-search')
        @selected_item = @container.down('.chzn-single')
        sf_width = dd_width - get_side_border_padding(@search_container) - get_side_border_padding(@search_field)
        @search_field.setStyle( {"width" : sf_width + "px"} )
      
      this.results_build()
      this.set_tab_index()
      @form_field.fire("liszt:ready", {chosen: this})
  
    register_observers: ->
      @container.observe "mousedown", (evt) => this.container_mousedown(evt)
      @container.observe "mouseup", (evt) => this.container_mouseup(evt)
      @container.observe "mouseenter", (evt) => this.mouse_enter(evt)
      @container.observe "mouseleave", (evt) => this.mouse_leave(evt)
      
      @search_results.observe "mouseup", (evt) => this.search_results_mouseup(evt)
      @search_results.observe "mouseover", (evt) => this.search_results_mouseover(evt)
      @search_results.observe "mouseout", (evt) => this.search_results_mouseout(evt)
      
      @form_field.observe "liszt:updated", (evt) => this.results_update_field(evt)
      @form_field.observe "liszt:activate", (evt) => this.activate_field(evt)
      @form_field.observe "liszt:open", (evt) => this.container_mousedown(evt)
  
      @search_field.observe "blur", (evt) => this.input_blur(evt)
      @search_field.observe "keyup", (evt) => this.keyup_checker(evt)
      @search_field.observe "keydown", (evt) => this.keydown_checker(evt)
      @search_field.observe "focus", (evt) => this.input_focus(evt)
  
      if @is_multiple
        @search_choices.observe "click", (evt) => this.choices_click(evt)
      else
        @container.observe "click", (evt) => evt.preventDefault() # gobble click of anchor
  
    search_field_disabled: ->
      @is_disabled = @form_field.disabled
      if(@is_disabled)
        @container.addClassName 'chzn-disabled'
        @search_field.disabled = true
        @selected_item.stopObserving "focus", @activate_action if !@is_multiple
        this.close_field()
      else
        @container.removeClassName 'chzn-disabled'
        @search_field.disabled = false
        @selected_item.observe "focus", @activate_action if !@is_multiple
  
    container_mousedown: (evt) ->
      if !@is_disabled
        target_closelink =  if evt? then evt.target.hasClassName "search-choice-close" else false
        if evt and evt.type is "mousedown" and not @results_showing
          evt.stop()
        if not @pending_destroy_click and not target_closelink
          if not @active_field
            @search_field.clear() if @is_multiple
            document.observe "click", @click_test_action
            this.results_show()
          else if not @is_multiple and evt and (evt.target is @selected_item || evt.target.up("a.chzn-single"))
            this.results_toggle()
  
          this.activate_field()
        else
          @pending_destroy_click = false
    
    container_mouseup: (evt) ->
      this.results_reset(evt) if evt.target.nodeName is "ABBR" and not @is_disabled
  
    blur_test: (evt) ->
      this.close_field() if not @active_field and @container.hasClassName("chzn-container-active")
  
    close_field: ->
      document.stopObserving "click", @click_test_action
      
      @active_field = false
      this.results_hide()
  
      @container.removeClassName "chzn-container-active"
      this.winnow_results_clear()
      this.clear_backstroke()
  
      this.show_search_field_default()
      this.search_field_scale()
  
    activate_field: ->
      @container.addClassName "chzn-container-active"
      @active_field = true
  
      @search_field.value = @search_field.value
      @search_field.focus()
  
    test_active_click: (evt) ->
      if evt.target.up('#' + @container_id)
        @active_field = true
      else
        this.close_field()
  
    results_build: ->
      @parsing = true
      @results_data = root.SelectParser.select_to_array @form_field
  
      if @is_multiple and @choices > 0
        @search_choices.select("li.search-choice").invoke("remove")
        @choices = 0
      else if not @is_multiple
        @selected_item.addClassName("chzn-default").down("span").update(@default_text)
        if @disable_search or @form_field.options.length <= @disable_search_threshold
          @container.addClassName "chzn-container-single-nosearch"
        else
          @container.removeClassName "chzn-container-single-nosearch"
  
      content = ''
      for data in @results_data
        if data.group
          content += this.result_add_group data
        else if !data.empty
          content += this.result_add_option data
          if data.selected and @is_multiple
            this.choice_build data
          else if data.selected and not @is_multiple
            @selected_item.removeClassName("chzn-default").down("span").update( data.html )
            this.single_deselect_control_build() if @allow_single_deselect
  
      this.search_field_disabled()
      this.show_search_field_default()
      this.search_field_scale()
      
      @search_results.update content
      @parsing = false
  
  
    result_add_group: (group) ->
      if not group.disabled
        group.dom_id = @container_id + "_g_" + group.array_index
        '<li id="' + group.dom_id + '" class="group-result">' + group.label.escapeHTML() + '</li>'
      else
        ""
    
    result_do_highlight: (el) ->
        this.result_clear_highlight()
  
        @result_highlight = el
        @result_highlight.addClassName "highlighted"
  
        maxHeight = parseInt @search_results.getStyle('maxHeight'), 10
        visible_top = @search_results.scrollTop
        visible_bottom = maxHeight + visible_top
  
        high_top = @result_highlight.positionedOffset().top
        high_bottom = high_top + @result_highlight.getHeight()
  
        if high_bottom >= visible_bottom
          @search_results.scrollTop = if (high_bottom - maxHeight) > 0 then (high_bottom - maxHeight) else 0
        else if high_top < visible_top
          @search_results.scrollTop = high_top
      
    result_clear_highlight: ->
      @result_highlight.removeClassName('highlighted') if @result_highlight
      @result_highlight = null
  
    results_show: ->
      if not @is_multiple
        @selected_item.addClassName('chzn-single-with-drop')
        if @result_single_selected
          this.result_do_highlight( @result_single_selected )
      else if @max_selected_options <= @choices
        @form_field.fire("liszt:maxselected", {chosen: this})
        return false
  
      dd_top = if @is_multiple then @container.getHeight() else (@container.getHeight() - 1)
      @form_field.fire("liszt:showing_dropdown", {chosen: this})
      @dropdown.setStyle {"top":  dd_top + "px", "left":0}
      @results_showing = true
  
      @search_field.focus()
      @search_field.value = @search_field.value
  
      this.winnow_results()
  
    results_hide: ->
      @selected_item.removeClassName('chzn-single-with-drop') unless @is_multiple
      this.result_clear_highlight()
      @form_field.fire("liszt:hiding_dropdown", {chosen: this})
      @dropdown.setStyle({"left":"-9000px"})
      @results_showing = false
  
  
    set_tab_index: (el) ->
      if @form_field.tabIndex
        ti = @form_field.tabIndex
        @form_field.tabIndex = -1
        @search_field.tabIndex = ti
  
    show_search_field_default: ->
      if @is_multiple and @choices < 1 and not @active_field
        @search_field.value = @default_text
        @search_field.addClassName "default"
      else
        @search_field.value = ""
        @search_field.removeClassName "default"
  
    search_results_mouseup: (evt) ->
      target = if evt.target.hasClassName("active-result") then evt.target else evt.target.up(".active-result")
      if target
        @result_highlight = target
        this.result_select(evt)
        @search_field.focus()
  
    search_results_mouseover: (evt) ->
      target = if evt.target.hasClassName("active-result") then evt.target else evt.target.up(".active-result")
      this.result_do_highlight( target ) if target
  
    search_results_mouseout: (evt) ->
      this.result_clear_highlight() if evt.target.hasClassName('active-result') or evt.target.up('.active-result')
  
  
    choices_click: (evt) ->
      evt.preventDefault()
      if( @active_field and not(evt.target.hasClassName('search-choice') or evt.target.up('.search-choice')) and not @results_showing )
        this.results_show()
  
    choice_build: (item) ->
      if @is_multiple and @max_selected_options <= @choices
        @form_field.fire("liszt:maxselected", {chosen: this})
        return false
      choice_id = @container_id + "_c_" + item.array_index
      @choices += 1
      @search_container.insert
        before: (if item.disabled then @choice_noclose_temp else @choice_temp).evaluate
          id:       choice_id
          choice:   item.html
          position: item.array_index
      if not item.disabled
        link = $(choice_id).down('a')
        link.observe "click", (evt) => this.choice_destroy_link_click(evt)
  
    choice_destroy_link_click: (evt) ->
      evt.preventDefault()
      if not @is_disabled
        @pending_destroy_click = true
        this.choice_destroy evt.target
  
    choice_destroy: (link) ->
      if this.result_deselect link.readAttribute("rel")
        @choices -= 1
        this.show_search_field_default()
  
        this.results_hide() if @is_multiple and @choices > 0 and @search_field.value.length < 1
  
        link.up('li').remove()
  
    results_reset: ->
      @form_field.options[0].selected = true
      @selected_item.down("span").update(@default_text)
      @selected_item.addClassName("chzn-default") if not @is_multiple
      this.show_search_field_default()
      this.results_reset_cleanup()
      @form_field.simulate("change") if typeof Event.simulate is 'function'
      this.results_hide() if @active_field
  
    results_reset_cleanup: ->
      @current_value = @form_field.value
      deselect_trigger = @selected_item.down("abbr")
      deselect_trigger.remove() if(deselect_trigger)
    
    result_select: (evt) ->
      if @result_highlight
        high = @result_highlight
        this.result_clear_highlight()
  
        if @is_multiple
          this.result_deactivate high
        else
          @search_results.descendants(".result-selected").invoke "removeClassName", "result-selected"
          @selected_item.removeClassName("chzn-default")
          @result_single_selected = high
        
        high.addClassName("result-selected")
          
        position = high.id.substr(high.id.lastIndexOf("_") + 1 )
        item = @results_data[position]
        item.selected = true
  
        @form_field.options[item.options_index].selected = true
  
        if @is_multiple
          this.choice_build item
        else
          @selected_item.down("span").update(item.html)
          this.single_deselect_control_build() if @allow_single_deselect
  
        this.results_hide() unless evt.metaKey and @is_multiple
  
        @search_field.value = ""
        
        @form_field.simulate("change") if typeof Event.simulate is 'function' && (@is_multiple || @form_field.value != @current_value)
        @current_value = @form_field.value
        
        this.search_field_scale()
  
    result_activate: (el) ->
      el.addClassName("active-result")
  
    result_deactivate: (el) ->
      el.removeClassName("active-result")
  
    result_deselect: (pos) ->
      result_data = @results_data[pos]
      
      if not @form_field.options[result_data.options_index].disabled
        result_data.selected = false
  
        @form_field.options[result_data.options_index].selected = false
        result = $(@container_id + "_o_" + pos)
        result.removeClassName("result-selected").addClassName("active-result").show()
  
        this.result_clear_highlight()
        this.winnow_results()
  
        @form_field.simulate("change") if typeof Event.simulate is 'function'
        this.search_field_scale()
        return true
      else
        return false
      
    single_deselect_control_build: ->
      @selected_item.down("span").insert { after: "<abbr class=\"search-choice-close\"></abbr>" } if @allow_single_deselect and not @selected_item.down("abbr")
  
    winnow_results: ->
      this.no_results_clear()
  
      results = 0
  
      searchText = if @search_field.value is @default_text then "" else @search_field.value.strip().escapeHTML()
      regexAnchor = if @search_contains then "" else "^"
      regex = new RegExp(regexAnchor + searchText.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&"), 'i')
      zregex = new RegExp(searchText.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&"), 'i')
  
      for option in @results_data
        if not option.disabled and not option.empty
          if option.group
            $(option.dom_id).hide()
          else if not (@is_multiple and option.selected)
            found = false
            result_id = option.dom_id
            
            if regex.test option.html
              found = true
              results += 1
            else if option.html.indexOf(" ") >= 0 or option.html.indexOf("[") == 0
              #TODO: replace this substitution of /\[\]/ with a list of characters to skip.
              parts = option.html.replace(/\[|\]/g, "").split(" ")
              if parts.length
                for part in parts
                  if regex.test part
                    found = true
                    results += 1
  
            if found
              if searchText.length
                startpos = option.html.search zregex
                text = option.html.substr(0, startpos + searchText.length) + '</em>' + option.html.substr(startpos + searchText.length)
                text = text.substr(0, startpos) + '<em>' + text.substr(startpos)
              else
                text = option.html
  
              $(result_id).update text if $(result_id).innerHTML != text
  
              this.result_activate $(result_id)
  
              $(@results_data[option.group_array_index].dom_id).setStyle({display: 'list-item'}) if option.group_array_index?
            else
              this.result_clear_highlight() if $(result_id) is @result_highlight
              this.result_deactivate $(result_id)
  
      if results < 1 and searchText.length
        this.no_results(searchText)
      else
        this.winnow_results_set_highlight()
  
    winnow_results_clear: ->
      @search_field.clear()
      lis = @search_results.select("li")
  
      for li in lis
        if li.hasClassName("group-result")
          li.show()
        else if not @is_multiple or not li.hasClassName("result-selected")
          this.result_activate li
  
    winnow_results_set_highlight: ->
      if not @result_highlight
  
        if not @is_multiple
          do_high = @search_results.down(".result-selected.active-result")
  
        if not do_high?
          do_high = @search_results.down(".active-result")
  
        this.result_do_highlight do_high if do_high?
    
    no_results: (terms) ->
      @search_results.insert @no_results_temp.evaluate( terms: terms )
    
    no_results_clear: ->
      nr = null
      nr.remove() while nr = @search_results.down(".no-results")
  
  
    keydown_arrow: ->
      actives = @search_results.select("li.active-result")
      if actives.length
        if not @result_highlight
          this.result_do_highlight actives.first()
        else if @results_showing
          sibs = @result_highlight.nextSiblings()
          nexts = sibs.intersect(actives)
          this.result_do_highlight nexts.first() if nexts.length
        this.results_show() if not @results_showing
  
    keyup_arrow: ->
      if not @results_showing and not @is_multiple
        this.results_show()
      else if @result_highlight
        sibs = @result_highlight.previousSiblings()
        actives = @search_results.select("li.active-result")
        prevs = sibs.intersect(actives)
  
        if prevs.length
          this.result_do_highlight prevs.first()
        else
          this.results_hide() if @choices > 0
          this.result_clear_highlight()
  
    keydown_backstroke: ->
      if @pending_backstroke
        this.choice_destroy @pending_backstroke.down("a")
        this.clear_backstroke()
      else
        next_available_destroy = @search_container.siblings().last()
        if next_available_destroy and next_available_destroy.hasClassName("search-choice") and not next_available_destroy.hasClassName("search-choice-disabled")
          @pending_backstroke = next_available_destroy
          @pending_backstroke.addClassName("search-choice-focus") if @pending_backstroke
          if @single_backstroke_delete
            @keydown_backstroke()
          else
            @pending_backstroke.addClassName("search-choice-focus")
  
    clear_backstroke: ->
      @pending_backstroke.removeClassName("search-choice-focus") if @pending_backstroke
      @pending_backstroke = null
  
    keydown_checker: (evt) ->
      stroke = evt.which ? evt.keyCode
      this.search_field_scale()
  
      this.clear_backstroke() if stroke != 8 and this.pending_backstroke
      
      switch stroke
        when 8
          @backstroke_length = this.search_field.value.length
          break
        when 9
          this.result_select(evt) if this.results_showing and not @is_multiple
          @mouse_on_container = false
          break
        when 13
          evt.preventDefault()
          break
        when 38
          evt.preventDefault()
          this.keyup_arrow()
          break
        when 40
          this.keydown_arrow()
          break
  
    search_field_scale: ->
      if @is_multiple
        h = 0
        w = 0
  
        style_block = "position:absolute; left: -1000px; top: -1000px; display:none;"
        styles = ['font-size','font-style', 'font-weight', 'font-family','line-height', 'text-transform', 'letter-spacing']
        
        for style in styles
          style_block += style + ":" + @search_field.getStyle(style) + ";"
        
        div = new Element('div', { 'style' : style_block }).update(@search_field.value.escapeHTML())
        document.body.appendChild(div)
  
        w = Element.measure(div, 'width') + 25
        div.remove()
  
        if( w > @f_width-10 )
          w = @f_width - 10
  
        @search_field.setStyle({'width': w + 'px'})
  
        dd_top = @container.getHeight()
        @dropdown.setStyle({"top":  dd_top + "px"})
  
  root.Chosen = Chosen
  
  # Prototype does not support version numbers so we add it ourselves
  if Prototype.Browser.IE 
    if /MSIE (\d+\.\d+);/.test(navigator.userAgent)
      Prototype.BrowserFeatures['Version'] = new Number(RegExp.$1);
  
  
  get_side_border_padding = (elmt) ->
    layout = new Element.Layout(elmt)
    side_border_padding = layout.get("border-left") + layout.get("border-right") + layout.get("padding-left") + layout.get("padding-right")
  
  root.get_side_border_padding = get_side_border_padding