jbe/bsw@0: --[[--
jbe/bsw@0: ui.paginate{
jbe@569:   selector         = selector,          -- a selector for items from the database (will be modified)
jbe@569:   anchor           = anchor,            -- optional name of anchor in document to jump to
jbe@569:   per_page         = per_page,          -- items per page, defaults to 10
jbe@569:   container_attr   = container_attr,    -- html attr for the container element
jbe@569:   link_attr        = link_attr,         -- html attr for each page link
jbe@569:   active_link_attr = active_link_attr,  -- alternative html attr for the active page link
jbe@569:   name             = name,              -- name of the CGI get variable, defaults to "page"
jbe@569:   position         = position,          -- position of page links relative to content: "before", "after", or "both" (default)
jbe@569:   content          = function()
jbe@569:     ...                                 -- code block which should be encapsulated with page selection links
jbe/bsw@0:   end
jbe/bsw@0: }
jbe/bsw@0: 
jbe@223: 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.
jbe@1: 
jbe/bsw@0: --]]--
jbe/bsw@0: 
jbe/bsw@0: function ui.paginate(args)
jbe@569:   local selector         = args.selector
jbe@569:   local anchor           = args.anchor
jbe@569:   local per_page         = args.per_page or 10
jbe@569:   local container_attr   = args.container_attr or { class = 'ui_paginate' }
jbe@569:   local link_attr        = args.link_attr or {}
jbe@569:   local active_link_attr = args.active_link_attr or link_attr
jbe@569:   local name             = args.name or 'page'
jbe@569:   local position         = args.position or 'both'
jbe@569:   local content          = args.content
jbe/bsw@0:   local count_selector = selector:get_db_conn():new_selector()
jbe/bsw@0:   count_selector:add_field('count(1)')
jbe/bsw@0:   count_selector:add_from(selector)
jbe/bsw@0:   count_selector:single_object_mode()
jbe/bsw@0:   local count = count_selector:exec().count
jbe@8:   local page_count = 1
jbe@8:   if count > 0 then
jbe@8:     page_count = math.floor((count - 1) / per_page) + 1
jbe@8:   end
jbe@223:   local current_page = atom.integer:load(request.get_param{name=name}) or 1
jbe/bsw@2:   if current_page > page_count then
jbe/bsw@2:     current_page = page_count
jbe/bsw@2:   end
jbe/bsw@0:   selector:limit(per_page)
jbe/bsw@0:   selector:offset((current_page - 1) * per_page)
jbe@92:   local id     = request.get_id_string()
jbe@92:   local params = request.get_param_strings()
jbe/bsw@0:   local function pagination_elements()
jbe/bsw@0:     if page_count > 1 then
jbe/bsw@0:       for page = 1, page_count do
jbe/bsw@0:         if page > 1 then
jbe/bsw@0:           slot.put(" ")
jbe/bsw@0:         end
jbe/bsw@0:         params[name] = page
jbe@569:         local attr
jbe/bsw@0:         if current_page == page then
jbe@569:           attr = table.new(active_link_attr)
jbe@568:           if attr.class then
jbe@568:             attr.class = attr.class .. " active"
jbe@568:           else
jbe@568:             attr.class = "active"
jbe@568:           end
jbe@569:         else
jbe@569:           attr = table.new(link_attr)
jbe/bsw@0:         end
jbe/bsw@0:         ui.link{
jbe/bsw@11:           attr   = attr,
jbe/bsw@0:           module = request.get_module(),
jbe/bsw@0:           view   = request.get_view(),
jbe/bsw@0:           id     = id,
jbe/bsw@0:           params = params,
jbe@568:           anchor = anchor,
jbe@223:           text   = tostring(page)
jbe/bsw@0:         }
jbe/bsw@0:       end
jbe/bsw@0:     end
jbe/bsw@0:   end
jbe/bsw@0:   ui.container{
jbe@568:     attr = container_attr,
jbe/bsw@0:     content = function()
jbe@568:       if position == 'before' or position == 'both' then
jbe@568:         ui.container{
jbe@568:           attr = { class = 'ui_paginate_head ui_paginate_select' },
jbe@568:           content = pagination_elements
jbe@568:         }
jbe@568:       end
jbe/bsw@0:       ui.container{
jbe/bsw@0:         attr = { class = 'ui_paginate_content' },
jbe/bsw@0:         content = content
jbe/bsw@0:       }
jbe@568:       if position == 'after' or position == 'both' then
jbe@568:         ui.container{
jbe@568:           attr = { class = 'ui_paginate_foot ui_paginate_select' },
jbe@568:           content = pagination_elements
jbe@568:         }
jbe@568:       end
jbe/bsw@0:     end
jbe/bsw@0:   }
jbe/bsw@0: end