%D \module
%D   [      file=s-fonts-statistics,
%D        version=2018.03.21, % guess
%D          title=\CONTEXT\ Style File,
%D       subtitle=Listing font statistics,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

\startmodule[fonts-statistics]

\startluacode

moduledata.fonts            = moduledata.fonts            or { }
moduledata.fonts.statistics = moduledata.fonts.statistics or { }

local context = context
local ctx_NC, ctx_BC, ctx_NR = context.NC, context.BC, context.NR

function moduledata.fonts.statistics.showusage()
    local t = table.load(tex.jobname.."-fonts-usage.lua")
    if t then
        local totalinstances = 0
        local totalfilesize  = 0
        local totalfilenames = #t
        if totalfilenames > 0 then
            context.starttabulate { "|r|r|c||" }
                context.FL()
                ctx_BC() context("used")
                ctx_BC() context("filesize")
                ctx_BC() context("version")
                ctx_BC() context("filename")
                ctx_NR()
                context.ML()
                for i=1,#t do
                    local ti = t[i]
                    local version   = tonumber(string.match(ti.version or "","^.-([%d%.]+)"))
                    local instances = ti.instances or 1
                    local filename  = file.basename(ti.filename) or "unknown"
                    local filesize  = ti.size or 0
                    totalinstances  = totalinstances + instances
                    totalfilesize   = totalfilesize + filesize
                    ctx_NC() context(instances)
                    ctx_NC() context("%0m",filesize)
                    ctx_NC() if version then context("%0.3f",version) end
                    ctx_NC() context.type(filename)
                    ctx_NR()
                end
                context.LL()
                ctx_BC() context(totalinstances)
                ctx_BC() context("%0m",totalfilesize)
                ctx_BC() context()
                ctx_BC() context("%i files loaded",totalfilenames)
                ctx_NR()
            context.stoptabulate()
        end
    end
end

\stopluacode

\installmodulecommandluasingle \showfontusage {moduledata.fonts.statistics.showusage}

\stopmodule

\continueifinputfile{s-fonts-statistics.mkiv}

\enabletrackers[fonts.usage]

\starttext

    \input klein

    \showfontusage

\stoptext