1 --[[--

2 ui.paginate{

3 selector = selector, -- a selector for items from the database (will be modified)

4 anchor = anchor, -- optional name of anchor in document to jump to

5 per_page = per_page, -- items per page, defaults to 10

6 container_attr = container_attr, -- html attr for the container element

7 name = name, -- name of the CGI get variable, defaults to "page"

8 page = page, -- directly specify a page, and ignore 'name' parameter

9 content = function()

10 ... -- code block which should be encapsulated with page selection links

11 end

12 }

13

14 This function preceeds and appends the output of the given 'content' function with page selection links. The passed selector will be modified to show only a limited amount ('per_page') of items. The currently displayed page will be determined directly by request.get_param{...}, and not via the param.get(...) function, in order to pass page selections automatically to sub-views.

15

16 --]]--

17

18 function ui.paginate(args)

19 local selector = args.selector

20 local per_page = args.per_page or 10

21 local name = args.name or 'page'

22 local content = args.content

23 local count_selector = selector:get_db_conn():new_selector()

24 count_selector:add_field('count(1)')

25 count_selector:add_from(selector)

26 count_selector:single_object_mode()

27 local count = count_selector:exec().count

28 local page_count = 1

29 if count > 0 then

30 page_count = math.floor((count - 1) / per_page) + 1

31 end

32 local current_page = atom.integer:load(request.get_param{name=name}) or 1

33 if current_page > page_count then

34 current_page = page_count

35 end

36 selector:limit(per_page)

37 selector:offset((current_page - 1) * per_page)

38 local id = request.get_id_string()

39 local params = request.get_param_strings()

40 local function pagination_elements()

41 if page_count > 1 then

42 for page = 1, page_count do

43 if page > 1 then

44 slot.put(" ")

45 end

46 params[name] = page

47 local attr = {}

48 if current_page == page then

49 attr.class = "active"

50 end

51 ui.link{

52 attr = attr,

53 module = request.get_module(),

54 view = request.get_view(),

55 id = id,

56 params = params,

57 anchor = args.anchor,

58 text = tostring(page)

59 }

60 end

61 end

62 end

63 ui.container{

64 attr = args.container_attr or { class = 'ui_paginate' },

65 content = function()

66 ui.container{

67 attr = { class = 'ui_paginate_head ui_paginate_select' },

68 content = pagination_elements

69 }

70 ui.container{

71 attr = { class = 'ui_paginate_content' },

72 content = content

73 }

74 ui.container{

75 attr = { class = 'ui_paginate_foot ui_paginate_select' },

76 content = pagination_elements

77 }

78 end

79 }

80 end