1 --[[--

2 ui.paginate{

3 selector = selector, -- a selector for items from the database

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

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

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

7 content = function()

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

9 end

10 }

11

12 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 cgi.params, and not via the param.get(...) function, in order to pass page selections automatically to sub-views.

13

14 --]]--

15

16 function ui.paginate(args)

17 local selector = args.selector

18 local per_page = args.per_page or 10

19 local name = args.name or 'page'

20 local content = args.content

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

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

23 count_selector:add_from(selector)

24 count_selector:single_object_mode()

25 local count = count_selector:exec().count

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

27 local current_page = atom.integer:load(cgi.params[name]) or 1

28 if current_page > page_count then

29 current_page = page_count

30 end

31 selector:limit(per_page)

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

33 local id = param.get_id_cgi()

34 local params = param.get_all_cgi()

35 local function pagination_elements()

36 if page_count > 1 then

37 for page = 1, page_count do

38 if page > 1 then

39 slot.put(" ")

40 end

41 params[name] = page

42 local attr = {}

43 if current_page == page then

44 attr.class = "active"

45 end

46 ui.link{

47 attr = attr,

48 module = request.get_module(),

49 view = request.get_view(),

50 id = id,

51 params = params,

52 text = tostring(page)

53 }

54 end

55 end

56 end

57 ui.container{

58 attr = { class = 'ui_paginate' },

59 content = function()

60 ui.container{

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

62 content = pagination_elements

63 }

64 ui.container{

65 attr = { class = 'ui_paginate_content' },

66 content = content

67 }

68 ui.container{

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

70 content = pagination_elements

71 }

72 end

73 }

74 end