Module:Graphical timeline
From Vigyanwiki
Documentation for this module may be created at Module:Graphical timeline/doc
local getArgs = require('Module:Arguments').getArgs
local compressSparseArray = require('Module:TableTools').compressSparseArray
local p = {}
-- =================
-- UTILITY FUNCTIONS
-- =================
-- Default colors for first 28 bars/periods
local defaultColor = {"#6ca","#ff9","#6cf","#c96","#fcc","#9f9","#96c","#cc6","#ccc","#f66","#6c6","#99f","#c66","#f9c",
"#396","#ff3","#06c","#963","#c9c","#9c6","#c63","#c96","#999","#c03","#393","#939","#996","#f69"}
-- The default width of annotations (in em)
local defaultAW = 8
-- Previous version default width (in em)
local oldDefaultAW = 7
-- Function to turn blank arguments back into nil
-- Parameters:
-- s = a string argument
-- Returns
-- if s is empty, turn back into nil (considered false by Lua)
local function ignoreBlank(s)
if s == "" then
return nil
end
return s
end
-- Function to suppress incorrect CSS values
-- Parameters:
-- val = dimensional value
-- unit = unit of value
-- nonneg = [bool] value needs to be non-negative
-- formatstr = optional format string
-- Returns:
-- correct string for html, or nil if val is negative
local function checkDim(val, unit, nonneg, formatstr)
if not val then
return nil
end
val = tonumber(val)
if not val or (nonneg and val < 0) then
return nil
end
if formatstr then
return mw.ustring.format(formatstr,val)..unit
end
return val..unit
end
-- function to scan argument list for pattern
-- Parameters:
-- args = an argument dict that will be scanned for one or more patterns
-- patterns = a list of Lua string patters to scan for
-- other = a list of other argument specification lists
-- each element o corresponds to a new argument to produce in the results
-- o[1] = key in new argument list
-- o[2] = prefix of old argument
-- o[3] = suffix of old argument
-- Returns:
-- new argument list that matches patterns specified, with new key names
--
-- This function makes the Lua module scalable, by specifying a list of string patterns that
-- contain relevant arguments for a single graphical element, e.g., "period(%d+)". These
-- patterns should have exactly one capture that returns a number.
--
-- When such a pattern is detected, the number is extracted and then other arguments
-- with the same number is searched for. Thus, if "period57" is detected, other relevant
-- arguments like "period57-text" are searched for and, if non-empty, are copied to the
-- output list with a new argument key. Thus, there is {"text","period","-text"}, and
-- "period(%d+)" detects period57, the code will look for "period57-text" in the input
-- and copy it's value to "text" on the output.
--
-- This function thus pulls all relevant arguments for a single graphical item out, and
-- makes an argument list to call a function to produce a single element (such as a bar or note)
function p._scanArgs(args,patterns,other)
local result = {}
for _, p in pairs(patterns) do
for k, v in pairs(args) do
local m = tonumber(mw.ustring.match(k,p))
-- if there is a matching argument, and it's not blank
-- and we haven't handled that match yet, then find other
-- arguments and copy them into output arg list.
-- We have to handle blank arguments for backward compatibility with the template
-- we check for an existing output with item m to save time
if m and v ~= "" and not result[m] then
local singleResult = {}
for _, o in ipairs(other) do
local foundVal = args[(o[2] or "")..m..(o[3] or "")]
if foundVal then
singleResult[o[1]] = foundVal
end
end
-- A hack: for any argument number m, there is a magic list of default
-- colors. We copy that default color for m into the new argument list, in
-- case it's useful. After this, m is discarded
singleResult.defaultColor = defaultColor[m]
result[m] = singleResult
end
end
end
-- Squeeze out all skipped values. Thus, continguous argument numbers are not
-- required: the module can get called with bar3, bar17, bar59 and it will only produce
-- three bars, in numerical order that they were called (3, 17, 59)
return compressSparseArray(result)
end
-- Function to compute the numeric step in the timescale
-- Parameters:
-- p1, p2 = lower and upper bounds of timescale
-- Returns:
-- round step size that produces ~10 steps between p1 and p2
--
-- Implements [[Template:Calculate increment]], except with a slight tweak:
-- The round value (0.1, 0.2, 0.5, 1.0) is selected based on minimum log
-- distance, so the thresholds are slightly tweaked
function p._calculateIncrement(p1, p2)
local d = math.abs(p1-p2)
if d < 1e-10 then
return 1e-10
end
local logd = math.log10(d)
local n = math.floor(logd)
local frac = logd-n
local prevPower = math.pow(10,n-1)
if frac < 0.5*math.log10(2) then
return prevPower
elseif frac < 0.5 then
return 2*prevPower
elseif frac < 0.5*math.log10(50) then
return 5*prevPower
else
return 10*prevPower
end
end
-- Signed power function for squashing timeline to be more readable
function p._signedPow(x,p)
if x < 0 then
return -math.pow(-x,p)
end
return math.pow(x,p)
end
-- Function to convert from time to location in HTML
-- Arguments:
-- t = time
-- from = earliest time in timeline
-- to = latest time in timeline
-- height = height of timeline (in some units)
-- scaling = method of scaling ('linear' or 'sqrt' or 'pow')
-- power = power law of scaling (if scaling='pow')
function p._scaleTime(t, from, to, height, scaling, power)
if scaling == 'pow' then
from = p._signedPow(from,power)
to = p._signedPow(to,power)
t = p._signedPow(t,power)
end
return height*(to-t)/(to-from)
end
-- Utility function to create HTML container for entire graphical timeline
-- Parameters:
-- container = HTML container for title
-- args = arguments passed to main
-- args["instance-id"] = unique string per Graphical timeline per page
-- args.embedded = is timeline embedded in another infobox?
-- args.align = float of timeline (default=right)
-- args.margin = uniform margin around timeline
-- args.bodyclass = CSS class for whole container
-- args.collapsible = make timeline collapsible
-- args.state = set collapse state
-- Returns;
-- html div object that is root of DOM for graphical timeline
--
-- CSS taken from previous version of [[Template:Grpahical timeline]]
local function createContainer(args)
args.align = args.align or "right"
local container = mw.html.create('table')
container:attr("id","Container"..(args["instance-id"] or ""))
container:attr("role","presentation")
container:addClass(args.bodyclass)
container:addClass("toccolours")
container:addClass("searchaux")
if not args.embedded then
if args.state == "collapsed" then
args.collapsible = true
container:addClass("mw-collapsed")
container:addClass("nomobile")
elseif args.state == "autocollapse" then
args.collapsible = true
container:addClass("autocollapse")
container:addClass("nomobile")
end
if args.collapsible then
container:addClass("mw-collapsible")
end
end
container:css("text-align","left")
container:css("padding","0 0.5em")
container:css("border-style",args.embedded and "none" or "solid")
if args.embedded then
container:css("margin","auto")
else
container:css("float",args.align)
if args.align == "right" or args.align == "left" then
container:css("clear",args.align)
end
local margins = {}
margins[1] = args.margin or "0.3em"
margins[2] = (args.align == "right" and 0) or args.margin or "1.4em"
margins[3] = args.margin or "0.8em"
margins[4] = (args.align == "left" and 0) or args.margin or "1.4em"
container:css("margin",table.concat(margins," "))
end
container:css("overflow","hidden")
return container
end
-- Utility function to create title for graphical timeline
-- Parameters:
-- args = arguments passed to main
-- args["instance-id"] = unique string per Graphical timeline per page
-- args["title-color"] = background color for title
-- args.title = title of timeline
-- Returns;
-- html div object that is the title
--
-- CSS taken from previous version of [[Template:Grpahical timeline]]
local function createTitle(container,args)
container:attr("id","Title"..(args["instance-id"] or ""))
local bottomPadding = args["link-to"] and (not args.embedded)
and (not args.collapsible) and "0" or "1em"
container:css("padding","1em 1em "..bottomPadding.." 1em")
local title = container:tag('div')
title:css("background-color",ignoreBlank(args["title-colour"] or args["title-color"] or "#77bb77"))
title:css("padding","0 0.2em 0 0.2em")
title:css("font-weight","bold")
title:css("text-align","center")
title:wikitext(args.title)
end
-- Utility function to create optional navbox header for timeline
-- Parameters:
-- container = container for navbox header
-- args = arguments passed to main
-- args.title = title of timeline
-- args["link-to"] = name of parent template (without namespace)
-- Returns;
-- html div object that is the navbox header
--
-- CSS taken from previous version of [[Template:Grpahical timeline]]
local function navboxHeader(container,args)
local frame = mw.getCurrentFrame()
container:attr("id","Navbox"..(args["instance-id"] or ""))
local topMargin = args.title and "0" or "0.2em"
container:css("padding","0")
container:css("margin",topMargin.." 1em 0 0")
container:css("text-align","right")
container:wikitext(frame:expandTemplate{title="Navbar",args={"Template:"..args["link-to"]}})
end
-- ==================
-- TIME AXIS AND BARS
-- ==================
--Function to create HTML time axis on left side of timeline
--Arguments:
-- container = HTML parent object
-- args = arguments passed to main
-- args.from = beginning (earliest) time of timeline
-- args.to = ending (latest) time of timeline
-- args.height = height of timeline
-- args["height-unit"] = unit of height (default args.unit)
-- args.unit = unit of measurement (default em)
-- args["instance-id"] = unique string per Graphical timeline per page
-- args["scale-increment"] = gap between time ticks (default=automatically computed)
-- args.scaling = method of scaling (linear or sqrt, linear by default)
-- args["label-freq"] = frequency of labels (per major tick)
-- Returns;
-- html div object for the time axis
--
-- CSS taken from previous version of [[Template:Grpahical timeline]]
function p._scalemarkers(container,args)
local height = tonumber(args.height) or 36
local unit = args["height-unit"] or args.unit or "em"
container:attr("id","Scale"..(args["instance-id"] or ""))
container:css("width","4.2em")
args.computedWidth = args.computedWidth+4.2
container:css("position","relative")
container:css("float","left")
container:css("font-size","100%")
container:css("height",checkDim(height,unit,true))
container:css("border-right","1px solid #242020")
local incr = args["scale-increment"] or p._calculateIncrement(args.from,args.to)
-- step through by half the desired increment, alternating small and large ticks
-- put labels every args["label-freq"] large ticks
local labelFreq = args["label-freq"] or 1
labelFreq = labelFreq*2 -- account for minor ticks
local halfIncr = incr/2
local tIndex = math.ceil(args.from/incr)*2 -- always start on a label
local toIndex = math.floor(args.to/halfIncr)
local tickCount = 0
while tIndex <= toIndex do
local t = tIndex*halfIncr
local div = container:tag("div")
div:css("float","right")
div:css("position","absolute")
div:css("right","-1px")
div:css("top",checkDim(p._scaleTime(t,args.from,args.to,height,args.scaling,args.power),
unit,nil,"%.2f"))
div:css("transform","translateY(-50%)")
local span = div:tag("span")
span:attr("name",showNum and "Number" or "Tick")
span:css("font-size","90%")
span:css("white-space:nowrap")
local text = ""
if tickCount%labelFreq == 0 then
if t < 0 then
text = mw.ustring.format("−%g ",-t)
else
text = mw.ustring.format("%g ",t)
end
end
if tickCount%2 == 0 then
text = text.."—"
else
text = text.."–"
end
span:wikitext(text)
tIndex = tIndex + 1
tickCount = tickCount + 1
end
end
-- Function to create timeline container div
-- Arguments:
-- container = HTML parent object
-- args = arguments passed to main
-- args["plot-colour"] = background color for timeline
-- args["instance-id"] = unique string per graphical timeline per page
-- args.height = height of timeline (36 by default)
-- args.width = width of timeline (10 by default)
-- args["height-unit"] = unit of height measurement (args.unit by default)
-- args["width-unit"] = unit of width measurement (args.unit by default)
-- args.unit = unit of measurement (em by default)
-- Returns:
-- timeline HTML object created
local function createTimeline(container,args)
local color = ignoreBlank(args["plot-colour"] or args["plot-color"])
container:attr("id","Timeline"..(args["instance-id"] or ""))
container:addClass("toccolours")
container:css("position","relative")
container:css("font-size","100%")
container:css("width","100%")
container:css("height",checkDim(args.height or 36,args["height-unit"] or args.unit or "em",true))
container:css("padding","0px")
container:css("float","left")
local width = args.width or 10
local widthUnit = args["width-unit"] or args.unit or "em"
container:css("width",checkDim(width,widthUnit,true))
if widthUnit == "em" then
args.computedWidth = args.computedWidth+width
elseif widthUnit == "px" then
args.computedWidth = args.computedWidth+width/13.3
else
args.computedWidth = args.computedWidth+10
end
container:css("border","none")
container:css("background-color",color)
return container
end
-- Function to draw single bar (or box)
-- Arguments:
-- container = parent HTML object for bar
-- args = arguments for this box
-- args.text = text to display
-- args.nudgedown = distance to nudge text down (in em)
-- args.nudgeup = distance to nudge text up (in em)
-- args.nudgeright = distance to nudge text right (in em)
-- args.nudgeleft = distance to nudge text left (in em)
-- args.colour = color of bar (default to color assigned to bar number)
-- args.left = fraction of timeline width for left edge of bar (default 0)
-- args.right = fraction of timeline width for right edge of bar (default 1)
-- args.to = beginning (bottom) of bar, in time units (default timeline begin)
-- args.from = end (top) of bar, in time units (default timeline end)
-- args.height = timeline height
-- args.width = timeline width
-- args["height-unit"] = units of timeline height (default args.unit)
-- args["width-unit"] = units of timeline width (default args.unit)
-- args.unit = units for timeline dimensions (default em)
-- args.border-style = CSS style for top/bottom of border (default "solid" if args.border)
function p._singleBar(container,args)
args.text = args.text or " "
args.nudgedown = (tonumber(args.nudgedown) or 0) - (tonumber(args.nudgeup) or 0)
args.nudgeright = (tonumber(args.nudgeright) or 0) - (tonumber(args.nudgeleft) or 0)
args.colour = args.colour or args.defaultColor
args.left = tonumber(args.left) or 0
args.right = tonumber(args.right) or 1
args.to = tonumber(args.to) or args["tl-to"]
args.from = tonumber(args.from) or args["tl-from"]
args.height = tonumber(args.height) or 36
args.width = tonumber(args.width) or 10
args["height-unit"] = args["height-unit"] or args.unit or "em"
args["width-unit"] = args["width-unit"] or args.unit or "em"
args.border = tonumber(args.border)
args["border-style"] = args["border-style"] or ((args.border or args["border-colour"]) and "solid") or "none"
-- the HTML element for the box/bar itself
local bar = container:tag('div')
bar:css("font-size","100%")
bar:css("background-color",ignoreBlank(args.colour or "#aaccff"))
bar:css("border-width",checkDim(args.border,args["height-unit"],true))
bar:css("border-color",ignoreBlank(args["border-colour"]))
bar:css("border-style",args["border-style"].." none")
bar:css("position","absolute")
bar:css("text-align","center")
bar:css("margin","0")
bar:css("padding","0")
local bar_top = p._scaleTime(args.to,args["tl-from"],args["tl-to"],args.height,args.scaling,args.power)
local bar_bottom = p._scaleTime(args.from,args["tl-from"],args["tl-to"],args.height,args.scaling,args.power)
local bar_height = bar_bottom-bar_top
bar:css("top",checkDim(bar_top,args["height-unit"],nil,"%.3f"))
if args["border-style"] ~= "none" and args.border then
bar_height = bar_height-2*args.border
end
bar:css("height",checkDim(bar_height,args["height-unit"],true,"%.3f"))
bar:css("left",checkDim(args.left*args.width,args["width-unit"],nil,"%.3f"))
bar:css("width",checkDim((args.right-args.left)*args.width,args["width-unit"],true,"%.3f"))
-- within the bar, use a div to nudge text away from center
local textParent = bar
if not args.alignBoxText then
local nudge = bar:tag('div')
nudge:css("font-size","100%")
nudge:css("position","relative")
nudge:css("top",checkDim(args.nudgedown,"em",nil))
nudge:css("left",checkDim(args.nudgeright,"em",nil))
textParent = nudge
end
-- put text div as child of nudge div (if exists)
local text = textParent:tag('div')
text:css("position","relative")
text:css("text-align","center")
text:css("font-size",ignoreBlank(args.textsize))
text:css("vertical-align","middle")
local text_bottom = -0.5*bar_height
text:css("display","block")
text:css("bottom",checkDim(text_bottom,args["height-unit"],nil,"%.3f"))
text:css("transform","translateY(-50%)")
text:css("z-index","5")
text:wikitext(ignoreBlank(args.text))
end
-- Function to render all bars/boxes in timeline
-- Arguments:
-- container = parent HTML object
-- args = arguments to main function
--
-- Global (main) arguments are parsed, individual box arguments are picked out
-- and passed to p._singleBar() above
--
-- The function looks for bar*-left, bar*-right, bar*-from, or bar*-to,
-- where * is a string of digits. That string of digits is then used to
-- find corresponding parameters of the individual bar.
-- For example, if bar23-left is found, then bar23-colour turns into local colour,
-- bar23-left turns into local left, bar23-from turns into local from, etc.
function p._bars(container,args)
local barArgs = p._scanArgs(args,{"^bar(%d+)-left$","^bar(%d+)-right$","^bar(%d+)-from","^bar(%d+)-to"},
{{"text","bar","-text"},
{"textsize","bar","-font-size"},
{"nudgedown","bar","-nudge-down"},
{"nudgeup","bar","-nudge-up"},
{"nudgeright","bar","-nudge-right"},
{"nudgeleft","bar","-nudge-left"},
{"colour","bar","-colour"},
{"colour","bar","-color"},
{"border","bar","-border-width"},
{"border-colour","bar","-border-colour"},
{"border-colour","bar","-border-color"},
{"border-style","bar","-border-style"},
{"left","bar","-left"},
{"right","bar","-right"},
{"from","bar","-from"},
{"to","bar","-to"}})
-- The individual bar arguments are placed into the barArgs table
-- Iterating through barArgs picks out the
for _, barg in ipairs(barArgs) do
-- barg is a table with the local arguments for one bar.
-- barg needs to have some global arguments copied into it:
barg["tl-from"] = args.from
barg["tl-to"] = args.to
barg.height = args.height
barg.width = args.width
barg["height-unit"] = args["height-unit"]
barg["width-unit"] = args["width-unit"]
barg.unit = args.unit
barg.scaling = args.scaling
barg.power = args.power
barg.alignBoxText = not args["disable-box-align"]
-- call _singleBar with the local arguments for one bar
p._singleBar(container,barg)
end
end
-- Function to draw a bar corresponding to a geological period
-- Arguments:
-- container = parent HTML object
-- args = global arguments passed to main
--
-- This function is just like _bars(), above, except with defaults for periods:
-- a period bar is triggered by period* (* = string of digits)
-- all other parameters start with "period", not "bar"
-- colour, from, and to parameters default to data from named period
-- text is a wikilink to period article
function p._periods(container,args)
local frame = mw.getCurrentFrame()
local periodArgs = p._scanArgs(args,{"^period(%d+)$"},
{{"text","period","-text"},
{"textsize","period","-font-size"},
{"period","period"},
{"nudgedown","period","-nudge-down"},
{"nudgeup","period","-nudge-up"},
{"nudgeright","period","-nudge-right"},
{"nudgeleft","period","-nudge-left"},
{"colour","period","-colour"},
{"colour","period","-color"},
{"border-width","period","-border-width"},
{"border-colour","period","-border-colour"},
{"border-colour","period","-border-color"},
{"border-style","period","-border-style"},
{"left","period","-left"},
{"right","period","-right"},
{"from","period","-from"},
{"to","period","-to"}})
-- Iterate through period* arguments, translating much like bar* arguments
-- Supply period defaults to local arguments, also
for _, parg in ipairs(periodArgs) do
parg.text = parg.text or ("[["..parg.period.."]]")
parg.textsize = "90%"
parg.colour = parg.colour or frame:expandTemplate{title="period color",args={parg.period}}
parg.from = parg.from or tonumber("-"..frame:expandTemplate{title="period start",args={parg.period}})
parg.to = parg.to or tonumber("-"..frame:expandTemplate{title="period end",args={parg.period}})
if tonumber(parg.from) < tonumber(args.from) then
parg.from = args.from
end
if tonumber(parg.to) > tonumber(args.to) then
parg.to = args.to
end
parg["tl-from"] = args.from
parg["tl-to"] = args.to
parg.height = args.height
parg.width = args.width
parg["height-unit"] = args["height-unit"]
parg["width-unit"] = args["width-unit"]
parg.unit = args.unit
parg.scaling = args.scaling
parg.power = args.power
parg.alignBoxText = not args["disable-box-align"]
p._singleBar(container,parg)
end
end
-- ===========
-- ANNOTATIONS
-- ===========
-- Function to render a single note (annotation)
-- Arguments:
-- container = parent HTML object
-- args = arguments for this single note
-- args.text = text to display in note
-- args.noarr = bool, true if no arrow should be used
-- args.height = height of timeline
-- args.unit = height units
-- args.at = position of annotation (in time units)
-- args.colour = color of text in note
-- args.textsize = size of text (default 90%)
-- args.nudgeright = nudge text (and arrow) to right (in em)
-- args.nudgeleft = nudge text (and arrow) to left (in em)
-- Following parameters are only applicable to "no arrow" case or when
-- args.alignArrow is false:
-- args.nudgedown = nudge text down (in em)
-- args.nudgeup = nudge text up (in em)
-- args.aw = annotation width (in em)
function p._singleNote(container,args)
-- Ensure some parameters default to sensible values
args.height = tonumber(args.height) or 36
args.at = tonumber(args.at) or 0.5*(args.to+args.from)
args.colour = args.colour or "black"
args.aw = tonumber(args.aw)
-- if string is centering, use old width to not break it
or mw.ustring.find(args.text,"center",1,true) and oldDefaultAW
or defaultAW
args.textsize = args.textsize or "90%"
-- Convert 4 nudge arguments to 2 numeric signed nudge dimensions (right, down)
args.nudgeright = (tonumber(args.nudgeright) or 0)-(tonumber(args.nudgeleft) or 0)
args.nudgedown = (tonumber(args.nudgedown) or 0)-(tonumber(args.nudgeup) or 0)
-- Two cases: no arrow, and arrow
-- For no arrow case, use previous CSS which works well to position text
if args.noarr then
-- First, place a bar that pushes annotation down to right spot
local bar = container:tag('div')
bar:addClass("annot-bar")
bar:css("width","auto")
bar:css("font-size","100%")
bar:css("position","absolute")
bar:css("text-align","center")
bar:css("margin-top",checkDim(p._scaleTime(args.at,args.from,args.to,args.height,args.scaling,args.power),
args.unit,nil,"%.3f"))
-- Now, nudge the text per nudge dimensions
local nudge = bar:tag('div')
nudge:addClass("annot-nudge")
nudge:css("font-size","100%")
nudge:css("float","left")
nudge:css("position","relative")
nudge:css("text-align","left")
nudge:css("top",checkDim(args.nudgedown-0.75,"em",nil))
nudge:css("left",checkDim(args.nudgeright,"em",nil))
nudge:css("width",checkDim(args.aw,"em",true))
-- Finally, place a dev for the text
local text = nudge:tag('div')
text:css("position","relative")
text:css("width","auto")
text:css("z-index","10")
text:css("font-size",ignoreBlank(args.textsize))
text:css("color",ignoreBlank(args.colour))
text:css("vertical-align","middle")
text:css("line-height","105%")
text:css("bottom","0")
text:wikitext(ignoreBlank(args.text))
else
-- In the arrow case, previous code didn't correctly line up the text
-- Now that we're in Lua, it's easy to use a table to hold the arrow against the text
-- One row: first td is arrow, second td is text
-- Table gets placed directly using top CSS and absolute position
local tbl = container:tag('table')
tbl:attr("role","presentation") -- warn screen readers this table is for layout only
-- choose a reasonable height for table, then position middle of that height in the timeline
tbl:css("position","absolute")
tbl:css("z-index","15")
local at_location = p._scaleTime(args.at,args.from,args.to,args.height,args.scaling,args.power)
tbl:css("top",checkDim(at_location,args.unit,nil,"%.3f"))
tbl:css("left",checkDim(args.nudgeright,"em",nil))
tbl:css("transform","translateY(-50%)")
tbl:css("padding","0")
tbl:css("margin","0")
tbl:css("font-size","100%")
local row = tbl:tag('tr')
local arrowCell = row:tag('td')
arrowCell:css("padding","0")
arrowCell:css("text-align","left")
arrowCell:css("vertical-align","middle")
local arrowSpan = arrowCell:tag('span')
arrowSpan:css("color",args.colour)
arrowSpan:wikitext("←") --- HTML for left-pointing arrow
local textCell = row:tag('td')
textCell:css("padding","0")
textCell:css("text-align","left")
textCell:css("vertical-align","middle")
local textParent = textCell
-- If disable-arrow-align is true, nudge the text per nudge dimensions:
if not args.alignArrow then
local nudge = textCell:tag('div')
nudge:addClass("annot-nudge")
nudge:css("font-size","100%")
nudge:css("float","left")
nudge:css("position","relative")
nudge:css("top",checkDim(args.nudgedown,"em",nil))
textParent = nudge
end
local text = textParent:tag('div')
text:css("z-index","10")
text:css("font-size",ignoreBlank(args.textsize))
text:css("color",ignoreBlank(args.colour))
text:css("display","block")
text:css("line-height","105%") --- don't crunch multiple lines of text
text:css("bottom","0")
text:wikitext(ignoreBlank(args.text))
end
end
-- Function to render all annotations in timeline
-- Arguments:
-- container = parent HTML object
-- args = arguments to main function
--
-- Global (main) arguments are parsed, individual box arguments are picked out
-- and passed to p._singleNote() above
--
-- The function looks for note*, where * is a string of digits
-- That string of digits is then used to find corresponding parameters of the individual note.
-- For example, if note23 is found, then note23-colour turns into local colour,
-- note-at turns into local at, note-texdt turns into local text, etc.
--
-- args["annotation-width"] overrides automatically determined width of annotation div
function p._annotations(container,args)
local noteArgs = p._scanArgs(args,{"^note(%d+)$"},
{{"text","note"},
{"noarr","note","-remove-arrow"},
{"noarr","note","-no-arrow"},
{"textsize","note","-size"},
{"textsize","note","-font-size"},
{"nudgedown","note","-nudge-down"},
{"nudgeup","note","-nudge-up"},
{"nudgeright","note","-nudge-right"},
{"nudgeleft","note","-nudge-left"},
{"colour","note","-colour"},
{"colour","note","-color"},
{"at","note","-at"}})
if #noteArgs == 0 then
return
end
-- a div to hold all of the notes
local notes= container:tag('td')
notes:attr("id","Annotations"..(args["instance-id"] or ""))
notes:css("padding","0")
notes:css("margin","0.7em 0 0.7em 0")
notes:css("float","left")
notes:css("position","relative")
-- Is there a "real" note? If so, leave room for it
-- real is: is non-empty and (has arrow or isn't nudged left)
local realNote = false
for _, narg in ipairs(noteArgs) do
local left = (tonumber(narg.nudgeleft) or 0)-(tonumber(narg.nudgeright) or 0)
if narg.text ~= "" and (not narg.noarr or left <= 0) then
realNote = true
args.hasRealNote = true -- record realNote boolean in args for further use
break
end
end
-- width of notes holder depends on whethere there are any "real" notes
-- width can be overriden
local aw = tonumber(args["annotations-width"]) or (realNote and defaultAW) or 0
aw = aw+2.25
notes:css("width",checkDim(aw,"em",true))
args.computedWidth = args.computedWidth+aw
local height = tonumber(args.height) or 36
local unit = args["height-unit"] or args.unit or "em"
notes:css("height",checkDim(height,unit,true))
for _, narg in ipairs(noteArgs) do
--- copy required global parameters to local note args
narg.from = args.from
narg.to = args.to
narg.height = args.height
narg.unit = args["height-unit"] or args["width-unit"] or "em"
narg.aw = args["annotations-width"]
narg.alignArrow = not args["disable-arrow-align"]
narg.scaling = args.scaling
narg.power = args.power
p._singleNote(notes,narg)
end
end
-- ====================
-- LEGENDS AND CAPTIONS
-- ====================
-- Function to render a single legend (below the timeline)
-- Arguments:
-- container = parent HTML object
-- args = argument table for this legend
-- args.colour = color to show in square
-- args.text = text that describes color
function p._singleLegend(container,args)
if not args.text then -- if no text, not a sensible legend
return
end
args.colour = args.colour or args.defaultColor or "transparent"
local row = container:tag('tr')
local squareCell = row:tag('td')
squareCell:css("padding",0)
local square = squareCell:tag('span')
square:css("background",ignoreBlank(args.colour))
square:css("padding","0em .1em")
square:css("border","solid 1px #242020")
square:css("height","1.5em")
square:css("width","1.5em")
square:css("margin",".25em .9em .25em .25em")
square:wikitext(" ")
local textCell = row:tag('td')
textCell:css("padding",0)
local text = textCell:tag('div')
text:wikitext(args.text)
end
function p._legends(container,args)
local legendArgs = p._scanArgs(args,{"^legend(%d+)$"},
{{"text","legend"},
{"colour","bar","-colour"},
{"colour","bar","-color"},
{"colour","legend","-colour"},
{"colour","legend","-color"}
})
if #legendArgs == 0 then
return
end
local legendRow = container:tag('tr')
local legendCell = container:tag('td')
legendCell:attr("id","Legend"..(args["instance-id"] or ""))
legendCell:attr("colspan",3)
legendCell:css("padding","0 0.2em 0.7em 1em")
local legend = legendCell:tag('table')
legend:attr("id","Legend"..(args["instance-id"] or ""))
legend:attr("role","presentation")
legend:addClass("toccolours")
legend:css("margin-left","3.1em")
legend:css("border-style","none")
legend:css("float","left")
legend:css("clear","both")
for _,larg in ipairs(legendArgs) do
p._singleLegend(legend,larg)
end
end
local helpString = [=[
----
'''Usage instructions'''
----
Copy the text below, adding multiple bars, legends and notes as required.
<br>Comments, enclosed in <code><!-</code><code>- -</code><code>-></code>, should be removed.
Remember:
* You must use <code>{</code><code>{!}</code><code>}</code> wherever you want a {{!}} to be
: rendered in the timeline
* Large borders will displace bars in many browsers
* Text should not be wider than its containing bar,
: as this may cause compatibility issues
* Units default to [[em (typography){{!}}em]], the height and width of an 'M'.
See {{tl|Graphical timeline}} for full documentation.
{{Graphical timeline/blank}}}}]=]
local function createCaption(container,args)
local captionRow = container:tag("tr")
local captionCell = captionRow:tag("td")
captionCell:attr("id","Caption"..(args["instance-id"] or ""))
captionCell:attr("colspan",3)
captionCell:css("padding","0")
captionCell:css("margin","0 0.2em 0.7em 0.2em")
local caption = captionCell:tag("div")
caption:attr("id","Caption"..(args["instance-id"] or ""))
caption:addClass("toccolours")
if args.embedded then
caption:css("margin","0 auto")
caption:css("float","left")
else
caption:css("margin","0 0.5em")
end
caption:css("border-style","none")
caption:css("clear","both")
caption:css("text-align","center")
local widthUnit = args["width-unit"] or args.unit or "em"
local aw = tonumber(args["annotations-width"]) or (args.hasRealNote and defaultAW) or -0.25
aw = aw+5+((widthUnit == "em" and tonumber(args.width)) or 10)
if aw > args.computedWidth then
args.computedWidth = aw
end
caption:css("width",checkDim(aw,"em",true))
caption:wikitext((args.caption or "")..((args.help and args.help ~= "off" and helpString) or ""))
end
function p._main(args)
-- For backward compatibility with template, all empty arguments are accepted.
-- But, for some parameters, empty will cause a Lua error, so for those, we convert
-- empty to nil.
for _, attr in pairs({"title","link-to","embedded","align","margin",
"height","width","unit","height-unit","width-unit","scale-increment",
"annotations-width","disable-arrow-align","disable-box-align","from","to"}) do
args[attr] = ignoreBlank(args[attr])
end
-- Check that to > from, and that they're both defined
local from = tonumber(args.from) or 0
local to = tonumber(args.to) or 0
if from > to then
args.from = to
args.to = from
else
args.from = from
args.to = to
end
if args.scaling == 'sqrt' then
args.scaling = 'pow'
args.power = 0.5
end
if args.scaling == 'pow' then
args.power = args.power or 0.5
end
args.computedWidth = 1.7
-- Create container table
local container = createContainer(args)
-- TITLE
if args.title and not args.embedded then
local titleRow = container:tag('tr')
local titleCell = titleRow:tag('td')
titleCell:attr("colspan",3)
createTitle(titleCell,args)
end
-- NAVBOX HEADER
if args["link-to"] and not args.embedded then
local navboxRow = container:tag('tr')
local navboxCell = navboxRow:tag('td')
navboxCell:attr("colspan",3)
navboxHeader(navboxCell,args)
end
local centralRow = container:tag('tr')
centralRow:css("vertical-align","top")
-- SCALEBAR
local scaleCell = centralRow:tag('td')
scaleCell:css("padding","0")
scaleCell:css("margin","0.7em 0 0.7em 0")
p._scalemarkers(scaleCell,args)
-- TIMELINE
local timelineCell = centralRow:tag('td')
timelineCell:css("padding","0")
timelineCell:css("margin","0.7em 0 0.7em 0")
local timeline = createTimeline(timelineCell,args)
-- PERIODS
p._periods(timeline,args)
-- BARS
p._bars(timeline,args)
-- ANNOTATIONS
p._annotations(centralRow,args)
-- LEGEND
p._legends(container,args)
-- CAPTION
createCaption(container,args)
container:css("min-width",checkDim(args.computedWidth,"em"))
return container
end
function p.main(frame)
local args = getArgs(frame,{frameOnly=false,parentOnly=false,parentFirst=true,removeBlanks=false})
return tostring(p._main(args):allDone())
end
return p
