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grammar |
import preview_warning from Module:Preview warning |
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local p = {}
--[[
is_preview
This function returns a boolean indicating whether the page is a preview.
]]
local function is_preview(frame)
local revision_id = frame:preprocess('{{REVISIONID}}')▼
-- {{REVISIONID}} is usually the empty string when previewed.▼
end
--[[
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This function returns either the first argument or second argument passed to
this module, depending on whether
Usage:
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]]
function p.main(frame)
if is_preview(frame) then
▲ local revision_id = frame:preprocess('{{REVISIONID}}')
▲ -- {{REVISIONID}} is usually the empty string when previewed.
▲ if not revision_id == nil and not revision_id == '' then
return frame.args[1] or ''
else
return frame.args[2] or ''
end
end
--[[
preview_warning
This function returns a "preview warning", which is the first argument marked
up with HTML and some supporting text, depending on whether the page is being previewed.
Usage:
{{#invoke:If preview|preview_warning|value_if_preview|value_if_not_preview}}
]]
function p.warning(frame)
if not is_preview(frame) then return '' end
local warning = frame.args[1]:match('^%s*(.-)%s*$') or ''
if warning == '' then
warning = 'Something is wrong with this template'
end
return mw.ustring.format(
'%s<div class="preview-warning"><strong>Warning:</strong> %s (this message is shown only in preview)</div>',
frame:extensionTag{
name = 'templatestyles', { src = 'Module:Preview warning/styles.css' }
},
warning
)
end
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