%D \module
%D   [       file=mtx-context-precache,
%D        version=2014.12.24,
%D          title=\CONTEXT\ Extra Trickry,
%D       subtitle=Precaching Fonts,
%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.

% begin help
%
% usage: context --extra=precache [no options yet]
%
% example: context --extra=precache
%
% end help

\startluacode

local lower      = string.lower
local filesuffix = file.suffix
local findfile   = resolvers.find_file

local report     = logs.reporter("fonts","precache")

function fonts.names.precache()
    local handlers = fonts.handlers
    if not handlers then
        report("no handlers available")
        return
    end
    local otfloader = handlers.otf and handlers.otf.load
    local afmloader = handlers.afm and handlers.afm.load
    if not (otfloader or afmloader) then
        report("no otf or afm handler available")
        return
    end
    fonts.names.load()
    local data = fonts.names.data
    if not data then
        report("no font data available")
        return
    end
    local specifications = data.specifications
    if not specifications then
        report("no font specifications available")
        return
    end
    local n = 0
    for i=1,#specifications do
        local specification = specifications[i]
        local filename      = specification.filename
        local cleanfilename = specification.cleanfilename
        local foundfile     = findfile(filename)
        if foundfile and foundfile ~= "" then
            local suffix = lower(filesuffix(foundfile))
            if suffix == "otf" or suffix == "ttf" then
                if otfloader then
                    report("caching otf file: %s",foundfile)
                    otfloader(foundfile) -- todo: ttc/sub
                    n = n + 1
                end
            elseif suffix == "afm" then
                if afmloader then
                    report("caching afm file: %s",foundfile)
                    afmloader(foundfile)
                    n = n + 1
                end
            end
        end
    end
    report("%s files out of %s cached",n,#specifications)
end

\stopluacode

\starttext

\setuppapersize
  [A4,landscape]

\setuplayout
  [width=middle,
   height=middle,
   footer=0pt,
   header=1cm,
   headerdistance=0cm,
   backspace=5mm,
   topspace=5mm]

\setupbodyfont
  [dejavu,6pt,tt]

\startmode[*first]
    \startluacode
        fonts.names.precache()
    \stopluacode
\stopmode

\startluacode
    fonts.names.load()

    local specifications = fonts.names.data.specifications

    local sorted = { }
    local hashed = { }

    for i=1,#specifications do
        local filename = specifications[i].cleanfilename
        sorted[i] = filename
        hashed[filename] = i
    end

    table.sort(sorted)

    local context  = context
    local basename = file.basename

    local NC   = context.NC
    local NR   = context.NR
    local HL   = context.HL
    local bold = context.bold

    context.starttabulate { "||||||||||" }
    HL()
    NC() bold("format")
    NC() bold("cleanfilename")
    NC() bold("filename")
 -- NC() bold("familyname")
 -- NC() bold("fontname")
    NC() bold("fullname")
    NC() bold("rawname")
    NC() bold("style")
    NC() bold("variant")
    NC() bold("weight")
    NC() bold("width")
    NC() NR()
    HL()
    for i=1,#sorted do
        local specification = specifications[hashed[sorted[i]]]
        NC() context(specification.format)
        NC() context(specification.cleanfilename)
        NC() context(basename(specification.filename))
     -- NC() context(specification.familyname)
     -- NC() context(specification.fontname)
        NC() context(specification.fullname)
        NC() context(specification.rawname)
        NC() context(specification.style)
        NC() context(specification.variant)
        NC() context(specification.weight)
        NC() context(specification.width)
        NC() NR()
    end
    context.stoptabulate()
\stopluacode

\stoptext