webmcp

view framework/env/ui/paginate.lua @ 569:5b19007574de

New argument active_link_attr for env.ui.paginate{...}
author jbe
date Wed Oct 13 17:21:44 2021 +0200 (11 months ago)
parents c43f251262d8
children
line source
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 link_attr = link_attr, -- html attr for each page link
8 active_link_attr = active_link_attr, -- alternative html attr for the active page link
9 name = name, -- name of the CGI get variable, defaults to "page"
10 position = position, -- position of page links relative to content: "before", "after", or "both" (default)
11 content = function()
12 ... -- code block which should be encapsulated with page selection links
13 end
14 }
16 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.
18 --]]--
20 function ui.paginate(args)
21 local selector = args.selector
22 local anchor = args.anchor
23 local per_page = args.per_page or 10
24 local container_attr = args.container_attr or { class = 'ui_paginate' }
25 local link_attr = args.link_attr or {}
26 local active_link_attr = args.active_link_attr or link_attr
27 local name = args.name or 'page'
28 local position = args.position or 'both'
29 local content = args.content
30 local count_selector = selector:get_db_conn():new_selector()
31 count_selector:add_field('count(1)')
32 count_selector:add_from(selector)
33 count_selector:single_object_mode()
34 local count = count_selector:exec().count
35 local page_count = 1
36 if count > 0 then
37 page_count = math.floor((count - 1) / per_page) + 1
38 end
39 local current_page = atom.integer:load(request.get_param{name=name}) or 1
40 if current_page > page_count then
41 current_page = page_count
42 end
43 selector:limit(per_page)
44 selector:offset((current_page - 1) * per_page)
45 local id = request.get_id_string()
46 local params = request.get_param_strings()
47 local function pagination_elements()
48 if page_count > 1 then
49 for page = 1, page_count do
50 if page > 1 then
51 slot.put(" ")
52 end
53 params[name] = page
54 local attr
55 if current_page == page then
56 attr = table.new(active_link_attr)
57 if attr.class then
58 attr.class = attr.class .. " active"
59 else
60 attr.class = "active"
61 end
62 else
63 attr = table.new(link_attr)
64 end
65 ui.link{
66 attr = attr,
67 module = request.get_module(),
68 view = request.get_view(),
69 id = id,
70 params = params,
71 anchor = anchor,
72 text = tostring(page)
73 }
74 end
75 end
76 end
77 ui.container{
78 attr = container_attr,
79 content = function()
80 if position == 'before' or position == 'both' then
81 ui.container{
82 attr = { class = 'ui_paginate_head ui_paginate_select' },
83 content = pagination_elements
84 }
85 end
86 ui.container{
87 attr = { class = 'ui_paginate_content' },
88 content = content
89 }
90 if position == 'after' or position == 'both' then
91 ui.container{
92 attr = { class = 'ui_paginate_foot ui_paginate_select' },
93 content = pagination_elements
94 }
95 end
96 end
97 }
98 end

Impressum / About Us