11130695999

Committed 01 Oct 2024 05:48PM UTC coverage: 33.585% (+4.0%) from 29.567%

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Merge pull request #2119 from Omikhleia/feat-math-sqrt

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/core/settings.lua

--- core settings instance
--- @module SILE.settings

local deprecator = function ()
   SU.deprecated("SILE.settings.*", "SILE.settings:*", "0.13.0", "0.15.0")
end

--- @type settings
local settings = pl.class()

function settings:_init ()
   self.state = {}
   self.declarations = {}
   self.stateQueue = {}
   self.defaults = {}
   self.hooks = {}

   self:declare({
      parameter = "document.language",
      type = "string",
      default = "en",
      hook = function (language)
         if SILE.scratch.loaded_languages and not SILE.scratch.loaded_languages[language] then
            SU.warn(([[Setting document.language to '%s', but support for '%s' has not been loaded!

  Consider invoking \language[main=%s] which loads language support before
  setting it or manually calling SILE.languageSupport.loadLanguage("%s").
            ]]):format(language, language, language, language))
         end
         fluent:set_locale(language)
      end,
      help = "Locale for localized language support",
   })

   self:declare({
      parameter = "document.parindent",
      type = "glue",
      default = SILE.types.node.glue("1bs"),
      help = "Glue at start of paragraph",
   })

   self:declare({
      parameter = "document.baselineskip",
      type = "vglue",
      default = SILE.types.node.vglue("1.2em plus 1pt"),
      help = "Leading",
   })

   self:declare({
      parameter = "document.lineskip",
      type = "vglue",
      default = SILE.types.node.vglue("1pt"),
      help = "Leading",
   })

   self:declare({
      parameter = "document.parskip",
      type = "vglue",
      default = SILE.types.node.vglue("0pt plus 1pt"),
      help = "Leading",
   })

   self:declare({
      parameter = "document.spaceskip",
      type = "length or nil",
      default = nil,
      help = "The length of a space (if nil, then measured from the font)",
   })

   self:declare({
      parameter = "document.rskip",
      type = "glue or nil",
      default = nil,
      help = "Skip to be added to right side of line",
   })

   self:declare({
      parameter = "document.lskip",
      type = "glue or nil",
      default = nil,
      help = "Skip to be added to left side of line",
   })

   self:declare({
      parameter = "document.zenkakuchar",
      default = "あ",
      type = "string",
      help = "The character measured to determine the length of a zenkaku width (全角幅)",
   })

   SILE.registerCommand(
      "set",
      function (options, content)
         local makedefault = SU.boolean(options.makedefault, false)
         local reset = SU.boolean(options.reset, false)
         local value = options.value
         if content and (type(content) == "function" or content[1]) then
            if makedefault then
               SU.warn(
                  "Are you sure meant to set default settings *and* pass content to ostensibly apply them to temporarily?"
               )
            end
            self:temporarily(function ()
               if options.parameter then
                  local parameter = SU.required(options, "parameter", "\\set command")
                  self:set(parameter, value, makedefault, reset)
               end
               SILE.process(content)
            end)
         else
            local parameter = SU.required(options, "parameter", "\\set command")
            self:set(parameter, value, makedefault, reset)
         end
      end,
      "Set a SILE parameter <parameter> to value <value> (restoring the value afterwards if <content> is provided)",
      nil,
      true
   )
end

--- Stash the current values of all settings in a stack to be returned to later
function settings:pushState ()
   if not self then
      return deprecator()
   end
   table.insert(self.stateQueue, self.state)
   self.state = pl.tablex.copy(self.state)
end

--- Return the most recently pushed set of values in the setting stack
function settings:popState ()
   if not self then
      return deprecator()
   end
   local previous = self.state
   self.state = table.remove(self.stateQueue)
   for parameter, oldvalue in pairs(previous) do
      if self.hooks[parameter] then
         local newvalue = self.state[parameter]
         if oldvalue ~= newvalue then
            self:runHooks(parameter, newvalue)
         end
      end
   end
end

--- Declare a new setting
--- @tparam table specs { parameter, type, default, help, hook, ... } declaration specification
function settings:declare (spec)
   if not spec then
      return deprecator()
   end
   if spec.name then
      SU.deprecated(
         "'name' argument of SILE.settings:declare",
         "'parameter' argument of SILE.settings:declare",
         "0.10.10",
         "0.11.0"
      )
   end
   if self.declarations[spec.parameter] then
      SU.debug("settings", "Attempt to re-declare setting:", spec.parameter)
      return
   end
   self.declarations[spec.parameter] = spec
   self.hooks[spec.parameter] = {}
   if spec.hook then
      self:registerHook(spec.parameter, spec.hook)
   end
   self:set(spec.parameter, spec.default, true)
end

--- Reset all settings to their registered default values.
function settings:reset ()
   if not self then
      return deprecator()
   end
   for k, _ in pairs(self.state) do
      self:set(k, self.defaults[k])
   end
end

--- Restore all settings to the value they had in the top-level state,
-- that is at the tap of the settings stack (normally the document level).
function settings:toplevelState ()
   if not self then
      return deprecator()
   end
   if #self.stateQueue ~= 0 then
      for parameter, _ in pairs(self.state) do
         -- Bypass self:set() as the latter performs some tests and a cast,
         -- but the setting might not have been defined in the top level state
         -- (in which case, assume the default value).
         self.state[parameter] = self.stateQueue[1][parameter] or self.defaults[parameter]
      end
   end
end

--- Get the value of a setting
-- @tparam string parameter The full name of the setting to fetch.
-- @return Value of setting
function settings:get (parameter)
   -- HACK FIXME https://github.com/sile-typesetter/sile/issues/1699
   -- See comment on set() below.
   if parameter == "current.parindent" then
      return SILE.typesetter and SILE.typesetter.state.parindent
   end
   if not parameter then
      return deprecator()
   end
   if not self.declarations[parameter] then
      SU.error("Undefined setting '" .. parameter .. "'")
   end
   if type(self.state[parameter]) ~= "nil" then
      return self.state[parameter]
   else
      return self.defaults[parameter]
   end
end

--- Set the value of a setting
-- @tparam string parameter The full name of the setting to change.
-- @param value The new value to change it to.
-- @tparam[opt=false] boolean makedefault Whether to make this the new default value.
-- @tparam[opt=false] boolean reset Whether to reset the value to the current default value.
function settings:set (parameter, value, makedefault, reset)
   -- HACK FIXME https://github.com/sile-typesetter/sile/issues/1699
   -- Anything dubbed current.xxx should likely NOT be a "setting" (subject
   -- to being pushed/popped via temporary stacking) and actually has its
   -- own lifecycle (e.g. reset for the next paragraph).
   -- These should be rather typesetter states, or something to that extent
   -- yet to clarify. Notably, current.parindent falls in that category,
   -- BUT probably current.hangAfter and current.hangIndent too.
   -- To avoid breaking too much code yet without being sure of the solution,
   -- we implement a hack of sorts for current.parindent only.
   -- Note moreover that current.parindent is currently probably a bad concept
   -- anyway:
   --   - It can be nil (= document.parindent applies)
   --   - It can be a zero-glue (\noindent, ragged environments, etc.)
   --   - It can be a valued glue set to document.parindent
   --     (e.g. from \indent, and document.parindent thus applies)
   --   - It could be another valued glue (uh, use case to ascertain)
   -- What we would _likely_ only need to track is whether document.parindent
   -- applies or not on the paragraph just composed afterwards...
   if parameter == "current.parindent" then
      if SILE.typesetter and not SILE.typesetter.state.hmodeOnly then
         SILE.typesetter.state.parindent = SU.cast("glue or nil", value)
      end
      return
   end
   if type(self) ~= "table" then
      return deprecator()
   end
   if not self.declarations[parameter] then
      SU.error("Undefined setting '" .. parameter .. "'")
   end
   if reset then
      if makedefault then
         SU.error("Can't set a new default and revert to and old default setting at the same time!")
      end
      value = self.defaults[parameter]
   else
      value = SU.cast(self.declarations[parameter].type, value)
   end
   self.state[parameter] = value
   if makedefault then
      self.defaults[parameter] = value
   end
   self:runHooks(parameter, value)
end

--- Register a callback hook to be run when a setting changes.
-- @tparam string parameter Name of the setting to add a hook to.
-- @tparam function func Callback function accepting one argument (the new value).
function settings:registerHook (parameter, func)
   table.insert(self.hooks[parameter], func)
end

--- Trigger execution of callback hooks for a given setting.
-- @tparam string parameter The name of the parameter changes.
-- @param value The new value of the setting, passed as the first argument to the hook function.
function settings:runHooks (parameter, value)
   if self.hooks[parameter] then
      for _, func in ipairs(self.hooks[parameter]) do
         SU.debug("classhooks", "Running setting hook for", parameter)
         func(value)
      end
   end
end

--- Isolate a block of processing so that setting changes made during the block don't last past the block.
-- (Under the hood this just uses `:pushState()`, the processes the function, then runs `:popState()`)
-- @tparam function func A function wrapping the actions to take without affecting settings for future use.
function settings:temporarily (func)
   if not func then
      return deprecator()
   end
   self:pushState()
   func()
   self:popState()
end

--- Create a settings wrapper function that applies current settings to later content processing.
--- @treturn function a closure function accepting one argument (content) to process using
--- typesetter settings as they are at the time of closure creation.
function settings:wrap ()
   if not self then
      return deprecator()
   end
   local clSettings = pl.tablex.copy(self.state)
   return function (content)
      table.insert(self.stateQueue, self.state)
      self.state = clSettings
      SILE.process(content)
      self:popState()
   end
end

return settings

1	--- core settings instance
2	--- @module SILE.settings
3
4	local deprecator = function ()
5	SU.deprecated("SILE.settings.", "SILE.settings:", "0.13.0", "0.15.0")	×
6	end
7
8	--- @type settings
9	local settings = pl.class()	99✔
10
11	function settings:_init ()	99✔
12	self.state = {}	99✔
13	self.declarations = {}	99✔
14	self.stateQueue = {}	99✔
15	self.defaults = {}	99✔
16	self.hooks = {}	99✔
17
18	self:declare({	198✔
19	parameter = "document.language",
20	type = "string",
21	default = "en",
22	hook = function (language)
23	if SILE.scratch.loaded_languages and not SILE.scratch.loaded_languages[language] then	527✔
24	SU.warn(([[Setting document.language to '%s', but support for '%s' has not been loaded!	16✔
25
26	Consider invoking \language[main=%s] which loads language support before
27	setting it or manually calling SILE.languageSupport.loadLanguage("%s").
28	]]):format(language, language, language, language))	8✔
29	end
30	fluent:set_locale(language)	527✔
31	end,
32	help = "Locale for localized language support",
33	})
34
35	self:declare({	198✔
36	parameter = "document.parindent",
37	type = "glue",
38	default = SILE.types.node.glue("1bs"),	297✔
39	help = "Glue at start of paragraph",
40	})
41
42	self:declare({	198✔
43	parameter = "document.baselineskip",
44	type = "vglue",
45	default = SILE.types.node.vglue("1.2em plus 1pt"),	198✔
46	help = "Leading",
47	})
48
49	self:declare({	198✔
50	parameter = "document.lineskip",
51	type = "vglue",
52	default = SILE.types.node.vglue("1pt"),	198✔
53	help = "Leading",
54	})
55
56	self:declare({	198✔
57	parameter = "document.parskip",
58	type = "vglue",
59	default = SILE.types.node.vglue("0pt plus 1pt"),	198✔
60	help = "Leading",
61	})
62
63	self:declare({	99✔
64	parameter = "document.spaceskip",
65	type = "length or nil",
66	default = nil,
67	help = "The length of a space (if nil, then measured from the font)",
68	})
69
70	self:declare({	99✔
71	parameter = "document.rskip",
72	type = "glue or nil",
73	default = nil,
74	help = "Skip to be added to right side of line",
75	})
76
77	self:declare({	99✔
78	parameter = "document.lskip",
79	type = "glue or nil",
80	default = nil,
81	help = "Skip to be added to left side of line",
82	})
83
84	self:declare({	99✔
85	parameter = "document.zenkakuchar",
86	default = "あ",
87	type = "string",
88	help = "The character measured to determine the length of a zenkaku width (全角幅)",
89	})
90
91	SILE.registerCommand(	198✔
92	"set",	99✔
93	function (options, content)
94	local makedefault = SU.boolean(options.makedefault, false)	42✔
95	local reset = SU.boolean(options.reset, false)	42✔
96	local value = options.value	42✔
97	if content and (type(content) == "function" or content[1]) then	42✔
98	if makedefault then	8✔
99	SU.warn(	×
100	"Are you sure meant to set default settings and pass content to ostensibly apply them to temporarily?"
101	)
102	end
103	self:temporarily(function ()	16✔
104	if options.parameter then	8✔
105	local parameter = SU.required(options, "parameter", "\\set command")	8✔
106	self:set(parameter, value, makedefault, reset)	8✔
107	end
108	SILE.process(content)	8✔
109	end)
110	else
111	local parameter = SU.required(options, "parameter", "\\set command")	34✔
112	self:set(parameter, value, makedefault, reset)	34✔
113	end
114	end,
115	"Set a SILE parameter <parameter> to value <value> (restoring the value afterwards if <content> is provided)",	99✔
116	nil,	99✔
117	true
118	)	99✔
119	end
120
121	--- Stash the current values of all settings in a stack to be returned to later
122	function settings:pushState ()	99✔
123	if not self then	619✔
124	return deprecator()	×
125	end
126	table.insert(self.stateQueue, self.state)	619✔
127	self.state = pl.tablex.copy(self.state)	1,238✔
128	end
129
130	--- Return the most recently pushed set of values in the setting stack
131	function settings:popState ()	99✔
132	if not self then	619✔
133	return deprecator()	×
134	end
135	local previous = self.state	619✔
136	self.state = table.remove(self.stateQueue)	1,238✔
137	for parameter, oldvalue in pairs(previous) do	34,000✔
138	if self.hooks[parameter] then	33,381✔
139	local newvalue = self.state[parameter]	33,381✔
140	if oldvalue ~= newvalue then	33,381✔
141	self:runHooks(parameter, newvalue)	841✔
142	end
143	end
144	end
145	end
146
147	--- Declare a new setting
148	--- @tparam table specs { parameter, type, default, help, hook, ... } declaration specification
149	function settings:declare (spec)	99✔
150	if not spec then	5,484✔
151	return deprecator()	×
152	end
153	if spec.name then	5,484✔
154	SU.deprecated(	×
155	"'name' argument of SILE.settings:declare",
156	"'parameter' argument of SILE.settings:declare",
157	"0.10.10",
158	"0.11.0"
159	)
160	end
161	if self.declarations[spec.parameter] then	5,484✔
162	SU.debug("settings", "Attempt to re-declare setting:", spec.parameter)	650✔
163	return	650✔
164	end
165	self.declarations[spec.parameter] = spec	4,834✔
166	self.hooks[spec.parameter] = {}	4,834✔
167	if spec.hook then	4,834✔
168	self:registerHook(spec.parameter, spec.hook)	99✔
169	end
170	self:set(spec.parameter, spec.default, true)	4,834✔
171	end
172
173	--- Reset all settings to their registered default values.
174	function settings:reset ()	99✔
175	if not self then	×
176	return deprecator()	×
177	end
178	for k, _ in pairs(self.state) do	×
179	self:set(k, self.defaults[k])	×
180	end
181	end
182
183	--- Restore all settings to the value they had in the top-level state,
184	-- that is at the tap of the settings stack (normally the document level).
185	function settings:toplevelState ()	99✔
186	if not self then	51✔
187	return deprecator()	×
188	end
189	if #self.stateQueue ~= 0 then	51✔
190	for parameter, _ in pairs(self.state) do	2,653✔
191	-- Bypass self:set() as the latter performs some tests and a cast,
192	-- but the setting might not have been defined in the top level state
193	-- (in which case, assume the default value).
194	self.state[parameter] = self.stateQueue[1][parameter] or self.defaults[parameter]	2,602✔
195	end
196	end
197	end
198
199	--- Get the value of a setting
200	-- @tparam string parameter The full name of the setting to fetch.
201	-- @return Value of setting
202	function settings:get (parameter)	99✔
203	-- HACK FIXME https://github.com/sile-typesetter/sile/issues/1699
204	-- See comment on set() below.
205	if parameter == "current.parindent" then	106,834✔
206	return SILE.typesetter and SILE.typesetter.state.parindent	610✔
207	end
208	if not parameter then	106,224✔
209	return deprecator()	×
210	end
211	if not self.declarations[parameter] then	106,224✔
212	SU.error("Undefined setting '" .. parameter .. "'")	×
213	end
214	if type(self.state[parameter]) ~= "nil" then	106,224✔
215	return self.state[parameter]	76,451✔
216	else
217	return self.defaults[parameter]	29,773✔
218	end
219	end
220
221	--- Set the value of a setting
222	-- @tparam string parameter The full name of the setting to change.
223	-- @param value The new value to change it to.
224	-- @tparam[opt=false] boolean makedefault Whether to make this the new default value.
225	-- @tparam[opt=false] boolean reset Whether to reset the value to the current default value.
226	function settings:set (parameter, value, makedefault, reset)	99✔
227	-- HACK FIXME https://github.com/sile-typesetter/sile/issues/1699
228	-- Anything dubbed current.xxx should likely NOT be a "setting" (subject
229	-- to being pushed/popped via temporary stacking) and actually has its
230	-- own lifecycle (e.g. reset for the next paragraph).
231	-- These should be rather typesetter states, or something to that extent
232	-- yet to clarify. Notably, current.parindent falls in that category,
233	-- BUT probably current.hangAfter and current.hangIndent too.
234	-- To avoid breaking too much code yet without being sure of the solution,
235	-- we implement a hack of sorts for current.parindent only.
236	-- Note moreover that current.parindent is currently probably a bad concept
237	-- anyway:
238	-- - It can be nil (= document.parindent applies)
239	-- - It can be a zero-glue (\noindent, ragged environments, etc.)
240	-- - It can be a valued glue set to document.parindent
241	-- (e.g. from \indent, and document.parindent thus applies)
242	-- - It could be another valued glue (uh, use case to ascertain)
243	-- What we would _likely_ only need to track is whether document.parindent
244	-- applies or not on the paragraph just composed afterwards...
245	if parameter == "current.parindent" then	10,888✔
246	if SILE.typesetter and not SILE.typesetter.state.hmodeOnly then	965✔
247	SILE.typesetter.state.parindent = SU.cast("glue or nil", value)	1,828✔
248	end
249	return	965✔
250	end
251	if type(self) ~= "table" then	9,923✔
252	return deprecator()	×
253	end
254	if not self.declarations[parameter] then	9,923✔
255	SU.error("Undefined setting '" .. parameter .. "'")	×
256	end
257	if reset then	9,923✔
258	if makedefault then	4✔
259	SU.error("Can't set a new default and revert to and old default setting at the same time!")	×
260	end
261	value = self.defaults[parameter]	4✔
262	else
263	value = SU.cast(self.declarations[parameter].type, value)	19,838✔
264	end
265	self.state[parameter] = value	9,923✔
266	if makedefault then	9,923✔
267	self.defaults[parameter] = value	4,861✔
268	end
269	self:runHooks(parameter, value)	9,923✔
270	end
271
272	--- Register a callback hook to be run when a setting changes.
273	-- @tparam string parameter Name of the setting to add a hook to.
274	-- @tparam function func Callback function accepting one argument (the new value).
275	function settings:registerHook (parameter, func)	99✔
276	table.insert(self.hooks[parameter], func)	99✔
277	end
278
279	--- Trigger execution of callback hooks for a given setting.
280	-- @tparam string parameter The name of the parameter changes.
281	-- @param value The new value of the setting, passed as the first argument to the hook function.
282	function settings:runHooks (parameter, value)	99✔
283	if self.hooks[parameter] then	10,764✔
284	for _, func in ipairs(self.hooks[parameter]) do	11,291✔
285	SU.debug("classhooks", "Running setting hook for", parameter)	527✔
286	func(value)	527✔
287	end
288	end
289	end
290
291	--- Isolate a block of processing so that setting changes made during the block don't last past the block.
292	-- (Under the hood this just uses `:pushState()`, the processes the function, then runs `:popState()`)
293	-- @tparam function func A function wrapping the actions to take without affecting settings for future use.
294	function settings:temporarily (func)	99✔
295	if not func then	524✔
296	return deprecator()	×
297	end
298	self:pushState()	524✔
299	func()	524✔
300	self:popState()	524✔
301	end
302
303	--- Create a settings wrapper function that applies current settings to later content processing.
304	--- @treturn function a closure function accepting one argument (content) to process using
305	--- typesetter settings as they are at the time of closure creation.
306	function settings:wrap ()	99✔
UNCOV 307	if not self then	×
308	return deprecator()	×
309	end
UNCOV 310	local clSettings = pl.tablex.copy(self.state)	×
311	return function (content)
UNCOV 312	table.insert(self.stateQueue, self.state)	×
UNCOV 313	self.state = clSettings	×
UNCOV 314	SILE.process(content)	×
UNCOV 315	self:popState()	×
316	end
317	end
318
319	return settings	99✔

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