+
+class Uporzadkuj extends Excercise
+ constructor: (element) ->
+ super element
+ $('ol, ul', @element).sortable({ items: "> li" })
+
+ check_question: (question) ->
+ positions = @get_value_list(question, 'original', true)
+ sorted = positions.sort()
+ pkts = $('.question-piece', question)
+
+ correct = 0
+ all = 0
+
+ for pkt in [0...pkts.length]
+ all +=1
+ if pkts.eq(pkt).data('pos') == sorted[pkt]
+ correct += 1
+ @piece_correct pkts.eq(pkt)
+ else
+ @piece_incorrect pkts.eq(pkt)
+ return [correct, all]
+
+
+# XXX propozycje="1/0"
+class Luki extends Excercise
+ constructor: (element) ->
+ super element
+
+ check: ->
+ all = 0
+ correct = 0
+ $(".question-piece", @element).each (i, qpiece) =>
+ if $(qpiece).data('solution') == $(qpiece).val()
+ @piece_correct qpiece
+ correct += 1
+ else
+ @piece_incorrect qpiece
+ all += 1
+
+ @show_score [correct, all]
+
+
+class Zastap extends Excercise
+ constructor: (element) ->
+ super element
+ $(".paragraph", @element).each (i, par) =>
+ @wrap_words $(par), $('<span class="zastap question-piece"/>')
+ spans = $("> span", par).attr("contenteditable", "true")
+ spans.click (ev) =>
+ spans.filter(':not(:empty)').removeClass('editing')
+ $(ev.target).addClass('editing')
+
+
+ check: ->
+ all = 0
+ correct = 0
+ $(".question-piece", @element).each (i, qpiece) =>
+ txt = $(qpiece).data('original')
+ should_be_changed = false
+ if not txt?
+ txt = $(qpiece).data('solution')
+ should_be_changed = true
+ if not txt?
+ return
+
+ if should_be_changed
+ all += 1
+
+ if txt != $(qpiece).text()
+ @piece_incorrect qpiece
+ else
+ if should_be_changed
+ @piece_correct qpiece
+ correct += 1
+
+ @show_score [correct, all]
+
+ wrap_words: (element, wrapper) ->
+ # This function wraps each word of element in wrapper, but does not descend into child-tags of element.
+ # It doesn't wrap things between words (defined by ignore RE below). Warning - ignore must begin with ^
+ ignore = /^[ \t.,:;()]+/
+
+ insertWrapped = (txt, elem) ->
+ nw = wrapper.clone()
+ $(document.createTextNode(txt))
+ .wrap(nw).parent().attr("data-original", txt).insertBefore(elem)
+
+ for j in [element.get(0).childNodes.length-1..0]
+ chld = element.get(0).childNodes[j]
+ if chld.nodeType == document.TEXT_NODE
+ len = chld.textContent.length
+ wordb = 0
+ i = 0
+ while i < len
+ space = ignore.exec(chld.textContent.substr(i))
+ if space?
+ if wordb < i
+ insertWrapped(chld.textContent.substr(wordb, i-wordb), chld)
+
+ $(document.createTextNode(space[0])).insertBefore(chld)
+ i += space[0].length
+ wordb = i
+ else
+ i = i + 1
+ if wordb < len - 1
+ insertWrapped(chld.textContent.substr(wordb, len - 1 - wordb), chld)
+ $(chld).remove()
+
+
+class Przyporzadkuj extends Excercise
+ is_multiple: ->
+ for qp in $(".question-piece", @element)
+ if $(qp).data('solution').split(/[ ,]+/).length > 1
+ return true
+ return false
+
+ constructor: (element) ->
+ super element
+
+ @multiple = @is_multiple()
+
+ $(".question", @element).each (i, question) =>
+ draggable_opts =
+ revert: 'invalid'
+ if @multiple
+ helper_opts = { helper: "clone" }
+ else helper_opts = {}
+
+ $(".draggable", question).draggable($.extend({}, draggable_opts,
+ helper_opts))
+
+ $(".predicate .droppable", question).droppable
+ accept: (draggable) ->
+ $draggable = $(draggable)
+ if not $draggable.is(".draggable")
+ return false
+ $predicate = $(this)
+
+ for added in $predicate.find("li")
+ if $(added).text() == $draggable.text()
+ return false
+ return true
+
+ drop: (ev, ui) =>
+ added = ui.draggable.clone()
+
+ added.attr('style', '')
+ $(ev.target).append(added)
+ added.draggable(draggable_opts)
+
+ if not @multiple or ui.draggable.closest(".predicate").length > 0
+ ui.draggable.remove()
+
+
+ $(".subject", question).droppable
+ accept: ".draggable"
+ drop: (ev, ui) =>
+ # this is to prevent a situation of dragging out and
+ # dropping back to the same place
+ if $(ui.draggable).closest(".subject").length > 0
+ return
+
+
+ added = ui.draggable.clone()
+
+ added.attr('style', '')
+ if not @multiple
+ $(ev.target).append(added)
+ added.draggable($.extend({}, draggable_opts, helper_opts))
+
+ ui.draggable.remove()
+
+ check_question: (question) ->
+ # subjects placed in predicates
+ count = 0
+ all = 0
+ all_multiple = 0
+ for qp in $(".predicate .question-piece", question)
+ pred = $(qp).closest("[data-predicate]")
+ v = @get_value_optional_list qp, 'solution'
+ mandatory = v[0]
+ optional = v[1]
+ all_multiple += mandatory.length + optional.length
+ pn = pred.data('predicate')
+ if mandatory.indexOf(pn) >= 0 or optional.indexOf(pn) >= 0
+ count += 1
+ @piece_correct qp
+ else
+ @piece_incorrect qp
+ all += 1
+
+ if @multiple
+ for qp in $(".subject .question-piece", question)
+ v = @get_value_optional_list qp, 'solution'
+ mandatory = v[0]
+ optional = v[1]
+ all_multiple += mandatory.length + optional.length
+ return [count, all_multiple]
+ else
+ return [count, all]
+
+
+
+