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jbe/bsw@0
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1 --[[--
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2 ui.autofield{
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3 name = name, -- field name (also used by default as HTML name)
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4 html_name = html_name, -- explicit HTML name to be used instead of 'name'
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5 value = nihil.lift(value), -- initial value, nil causes automatic lookup of value, use nihil.lift(nil) for nil
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6 container_attr = container_attr, -- extra HTML attributes for the container (div) enclosing field and label
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7 attr = attr, -- extra HTML attributes for the field
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8 label = label, -- text to be used as label for the input field
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9 label_attr = label_attr, -- extra HTML attributes for the label
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10 readonly = readonly_flag -- set to true, to force read-only mode
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11 record = record, -- record to be used, defaults to record given to ui.form{...}
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12 ... -- extra arguments for applicable ui.field.* helpers
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13 }
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14
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15 This function automatically selects a ui.field.* helper to be used for a field of a record.
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16
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17 --]]--
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18
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19 function ui.autofield(args)
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20 local args = table.new(args)
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21 assert(args.name, "ui.autofield{...} needs a field 'name'.")
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22 if not args.record then
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23 local slot_state = slot.get_state_table()
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24 if not slot_state then
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25 error("ui.autofield{...} was called without an explicit record to be used, and is also not called inside a form.")
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26 elseif not slot_state.form_record then
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27 error("ui.autofield{...} was called without an explicit record to be used, and the form does not have a record assigned either.")
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28 else
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29 args.record = slot_state.form_record
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30 end
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31 end
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32 local class = args.record._class
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33 assert(class, "Used ui.autofield{...} on a record with no class information stored in the '_class' attribute.")
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34 local fields, field_info, ui_field_type, ui_field_options
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35 fields = class.fields
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36 if fields then
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37 field_info = fields[args.name]
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38 end
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39 if field_info then
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40 ui_field_type = field_info.ui_field_type
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41 ui_field_options = table.new(field_info.ui_field_options)
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42 end
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43 if not ui_field_type then
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44 ui_field_type = "text"
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45 end
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46 if not ui_field_options then
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47 ui_field_options = {}
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48 end
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49 local ui_field_func = ui.field[ui_field_type]
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50 if not ui_field_func then
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51 error(string.format("Did not find ui.field helper of type %q.", ui_field_type))
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52 end
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53 for key, value in pairs(ui_field_options) do
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54 if args[key] == nil then
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55 args[key] = value
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56 end
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57 end
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58 return ui_field_func(args)
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59 end
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