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--
-- Copyright (c) 2021-2023 Zeping Lee
-- Released under the MIT license.
-- Repository: https://github.com/zepinglee/citeproc-lua
--
local label = {}
local element
local ir_node
local output
local util
if kpse then
element = require("citeproc-element")
ir_node = require("citeproc-ir-node")
output = require("citeproc-output")
util = require("citeproc-util")
else
element = require("citeproc.element")
ir_node = require("citeproc.ir-node")
output = require("citeproc.output")
util = require("citeproc.util")
end
local Element = element.Element
local IrNode = ir_node.IrNode
local Rendered = ir_node.Rendered
local PlainText = output.PlainText
-- [Label](https://docs.citationstyles.org/en/stable/specification.html#label)
local Label = Element:derive("label")
Label.form = "long"
Label.plural = "contextual"
function Label:from_node(node)
local o = Label:new()
o:set_attribute(node, "variable")
o:set_attribute(node, "form")
o:set_attribute(node, "plural")
o:set_affixes_attributes(node)
o:set_formatting_attributes(node)
o:set_text_case_attribute(node)
o:set_strip_periods_attribute(node)
return o
end
function Label:build_ir(engine, state, context)
-- local variable = context:get_variable(self.variable, self.form)
local is_plural = false
if self.plural == "always" then
is_plural = true
elseif self.plural == "never" then
is_plural = false
elseif self.plural == "contextual" then
is_plural = self:_is_variable_plural(self.variable, context)
end
local variable = self.variable
if variable == "locator" then
variable = context:get_variable("label") or "page"
if variable == "sub verbo" then
-- bugreports_MovePunctuationInsideQuotesForLocator.txt
variable = "sub-verbo"
end
end
local text = context:get_simple_term(variable, self.form, is_plural)
if not text or text == "" then
return nil
end
local inlines = self:render_text_inlines(text, context)
return Rendered:new(inlines, self)
end
function Label:_is_variable_plural(variable, context)
local value = context:get_variable(variable)
if not value then
return false
end
local variable_type = util.variable_types[variable]
if variable_type == "name" then
return #variable > 1
elseif variable_type == "number" then
if util.startswith(variable, "number-of-") then
-- Issue #27: "number-of-pages": "91–129"
value = string.match(tostring(value), "%d+")
return value and tonumber(value) > 1
else
value = tostring(value)
local tokens = self:parse_number_tokens(value, context)
local num_numeric_tokens = 0
for _, token in ipairs(tokens) do
if token.type == "number" then
num_numeric_tokens = num_numeric_tokens + 1
end
end
return num_numeric_tokens > 1
end
end
return false
end
label.Label = Label
return label
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