if not modules then modules = { } end modules ['mtx-server-ctx-fonttest'] = {
    version   = 1.001,
    comment   = "Font Feature Tester",
    author    = "Hans Hagen",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

-- probably too much but who cares

dofile(resolvers.findfile("trac-lmx.lua","tex"))
dofile(resolvers.findfile("font-ini.lua","tex"))
dofile(resolvers.findfile("font-con.lua","tex"))
-- dofile(resolvers.findfile("font-oti.lua","tex"))
-- dofile(resolvers.findfile("font-otf.lua","tex"))
-- dofile(resolvers.findfile("font-otp.lua","tex"))
dofile(resolvers.findfile("font-otr.lua","tex"))
dofile(resolvers.findfile("font-cff.lua","tex"))
-- dofile(resolvers.findfile("font-ttf.lua","tex"))
-- dofile(resolvers.findfile("font-ott.lua","tex"))
dofile(resolvers.findfile("font-dsp.lua","tex"))
dofile(resolvers.findfile("font-onr.lua","tex"))
dofile(resolvers.findfile("font-syn.lua","tex"))
dofile(resolvers.findfile("font-mis.lua","tex"))

local format, gsub, concat, match, find = string.format, string.gsub, table.concat, string.match, string.find

local formatters      = string.formatters

local report          = logs.reporter("ctx-fonttest")

local sample_line     = "This is a sample line!"
local tempname        = "mtx-server-ctx-fonttest-temp"
local temppath        = caches.setfirstwritablefile("temp","mtx-server-ctx-fonttest")
local basename        = "mtx-server-ctx-fonttest-data.lua"
local basepath        = temppath

local remove_suffixes = { "tex", "pdf", "log" }
local what_options    = { "trace", "basemode" }

for i=1,#remove_suffixes do
    os.remove(file.join(temppath,file.addsuffix(tempname,remove_suffixes[i])))
end

local foolcache = 0

local function makename(name,new)
    if new then
        foolcache = foolcache > 25 and 1 or foolcache + 1
    end
    return formatters["%s-%02i"](name,foolcache)
end

-- nowadays i would use the more advanced template mechanism with named variables

local process_templates = { }

--   %\definedfont[name:%s*sample]

process_templates.default = formatters [ [[
\starttext
    \setupdirections[bidi=one]
    \definefontfeature[sample][analyze=yes,%s]
    \definedfont[name:%s*none]
    \startTEXpage[offset=3pt]
        \detokenize{%s}
        \blank
        \definedfont[name:%s*sample]
        \detokenize{%s}
    \stopTEXpage
\stoptext
]] ]

process_templates.cache = formatters [ [[
\starttext
    \definedfont[name:%s]
    \startTEXpage[offset=3pt]
        cached: \detokenize{%s}
    \stopTEXpage
\stoptext
]] ]

process_templates.trace = formatters [ [[
\usemodule[fnt-20]

\definefontfeature[sample][%s]

\setupcolors[state=start]

\setupdirections[bidi=global]

\setvariables
  [otftracker]
  [title=Test Run,
   font=name:%s,
   direction=0,
   features=sample,
   sample={‍\detokenize{%s}}]
]] ]

local javascripts = formatters [ [[
function selected_radio(name) {
    var form = document.forms["main-form"] ;
    var script = form.elements[name] ;
	if (script) {
        var n = script.length ;
        if (n) {
            for (var i=0; i<n; i++) {
                if (script[i].checked) {
                    return script[i].value ;
                }
            }
		}
	}
    return "" ;
}

function reset_valid() {
    var fields = document.getElementsByTagName("span") ;
    for (var i=0; i<fields.length; i++) {
        var e = fields[i]
        if (e) {
            if (e.className == "valid") {
                e.className = "" ;
            }
        }
    }
}

function set_valid() {
    var script = selected_radio("script") ;
    var language = selected_radio("language") ;
    if (script && language) {
        var s = feature_hash[script] ;
        if (s) {
            for (l in s) {
                var e = document.getElementById("t-l-" + l) ;
                if (e) {
                    e.className = "valid" ;
                }
            }
            var l = s[language] ;
            if (l) {
                for (i in l) {
                    var e = document.getElementById("t-f-" + i) ;
                    if (e) {
                        e.className = "valid" ;
                    }
                }
            }
            var e = document.getElementById("t-s-" + script) ;
            if (e) {
                e.className = "valid" ;
            }
        }
    }
}

function check_form() {
    reset_valid() ;
    set_valid() ;
}

function check_script() {
    reset_valid() ;
    set_valid() ;
}

function check_language() {
    reset_valid() ;
    set_valid() ;
}

function check_feature() {
    // not needed
}
]] ]

local jitmode = false -- assumes local use (one user as shared)

local run_context_normal = formatters["mtxrun --path=%q --script context --once --batchmode %q"]
local run_context_jitted = formatters["mtxrun --path=%q --script context --once --batchmode --jit %q"]

local function runcontext(temppath,filename)
    local start = os.clock()
    local command = (jitmode and run_context_jitted or run_context_normal)(temppath,filename)
    report("temppath: %s",temppath)
    report("filename: %s",filename)
    report("command: %s",command)
    os.execute(command)
    return os.clock() - start
end

local function identifyfonts()
    local command = "mtxrun --script font --reload"
    report("command: %s",command)
    os.execute(command)
end

local cache = { }

local function showfeatures(f)
    if f then
        report("processing font '%s'",f)
        local features = cache[f]
        if features == nil then
            features = fonts.helpers.getfeatures(resolvers.findfile(f))
            if not features then
                report("building cache for '%s'",f)
                local usedname = file.addsuffix(tempname,"tex")
                io.savedata(file.join(temppath,usedname),process_templates.cache(f,f))
                runcontext(temppath,usedname)
                features = fonts.helpers.getfeatures(f)
            end
            cache[f] = features or false
            report("caching info of '%s'",f)
        else
            report("using cached info of '%s'",f)
        end
        if features then
            local scr, lan, fea, rev = { }, { }, { }, { }
            local function show(what)
                local data = features[what]
                if data and next(data) then
                    for f,ff in next, data do
                        if find(f,"<") then
                            -- ignore aat for the moment
                        else
                            fea[f] = true
                            for s, ss in next, ff do
                                if find(s,"%*") then
                                    -- ignore *
                                else
                                    scr[s] = true
                                    local rs = rev[s] if not rs then rs = {} rev[s] = rs end
                                    for k, l in next, ss do
                                        if find(k,"%*") then
                                            -- ignore *
                                        else
                                            lan[k] = true
                                            local rsk = rs[k] if not rsk then rsk = { } rs[k] = rsk end
                                            rsk[f] = true
                                        end
                                    end
                                end
                            end
                        end
                    end
                end
            end
            for what, v in table.sortedhash(features) do
                show(what)
            end
            -- we could json this
            local stupid = { }
            stupid[#stupid+1] = "var feature_hash = new Array ;"
            for s, sr in next, rev do
                stupid[#stupid+1] = formatters["feature_hash['%s'] = new Array ;"](s)
                for l, lr in next, sr do
                    stupid[#stupid+1] = formatters["feature_hash['%s']['%s'] = new Array ;"](s,l)
                    for f, fr in next, lr do
                        stupid[#stupid+1] = formatters["feature_hash['%s']['%s']['%s'] = true ;"](s,l,f)
                    end
                end
            end
            -- gpos feature script languages
            return {
                scripts = scr,
                languages = lan,
                features = fea,
                javascript = concat(stupid,"\n")
            }
        end
    end
end

local template_h = formatters [ [[
<tr>
    <th>safe name&nbsp;&nbsp;&nbsp;&nbsp;</th>
    <th>family name&nbsp;&nbsp;&nbsp;&nbsp;</th>
    <th>style-variant-weight-width&nbsp;&nbsp;&nbsp;&nbsp;</th>
    <th>font name&nbsp;&nbsp;&nbsp;&nbsp;</th>
    <th>weight&nbsp;&nbsp;&nbsp;&nbsp;</th>
    <th>filename</th>
</tr>]] ]

local template_d = formatters [ [[
<tr>
    <td><a href='mtx-server-ctx-fonttest.lua?selection=%s'>%s</a>&nbsp;&nbsp;&nbsp;&nbsp;</td>
    <td>%s&nbsp;&nbsp;&nbsp;&nbsp;</td>
    <td>%s-%s-%s-%s&nbsp;&nbsp;&nbsp;&nbsp;</td>
    <td>%s&nbsp;&nbsp;&nbsp;&nbsp;</td>
    <td>%s&nbsp;&nbsp;&nbsp;&nbsp;</td>
    <td>%s</td>
</tr>]] ]

local function select_font()
    local t = fonts.names.list(".*",false,true)
    if t then
        local listoffonts = { }
        listoffonts[#listoffonts+1] = "<h1>Fonts</h1><br/>"
        listoffonts[#listoffonts+1] = "<table>"
        listoffonts[#listoffonts+1] = template_h()
        for k, v in table.sortedhash(t) do
            local kind = v.format
            if kind == "otf" or kind == "ttf" or kind == "ttc" then
                local fontname = v.fontname
                listoffonts[#listoffonts+1] = template_d(
                    fontname,
                    fontname,
                    v.familyname or "",
                    t.variant    or "normal",
                    t.weight     or "normal",
                    t.width      or "normal",
                    t.style      or "normal",
                    v.rawname    or fontname,
                    v.fontweight or "",
                    v.filename   or ""
                )
            end
        end
        listoffonts[#listoffonts+1] = "</table>"
        return concat(listoffonts,"\n")
    end
    return "<b>no fonts</b>"
end

local edit_template = formatters [ [[
    <textarea name='sampletext' rows='5' cols='100'>%s</textarea>
    <br/> <br/>name:&nbsp;<input type='text' name='name' size='20' value=%q/>&nbsp;&nbsp; title:&nbsp;<input type='text' name='title' size='40' value=%q/>
    <br/> <br/>scripts:&nbsp;%s
    <br/> <br/>languages:&nbsp;%s
    <br/> <br/>features:&nbsp;%s
    <br/> <br/>options:&nbsp;%s
]] ]

--  <embed src="%s#toolbar=0&amp;navpanes=0&amp;scrollbar=0" width="100%%"/>

local result_template = formatters [ [[
    <br/> <br/>
    <embed src="%s#view=Fit&amp;toolbar=0&amp;navpanes=0&amp;scrollbar=0" width="100%%"/>
    <br/> <br/> results:&nbsp;
    <a href='%s' target="source">tex file</a>&nbsp;&nbsp;
    <a href='%s' target="result">pdf file</a>&nbsp;&nbsp;
    (runtime: %s)
    <br/> <br/>
]] ]

local main_template = formatters [ [[
    <h1>Font: %s</h1><br/>
    %s
    %s
]] ]

scripts.webserver.registerpath(temppath)

local function get_specification(name)
    return fonts.names.resolvedspecification(name or "")
end

local function edit_font(currentfont,detail,tempname,runtime)
    report("entering edit mode for '%s'",currentfont)
    local specification = get_specification(currentfont)
    if specification then
        local htmldata = showfeatures(specification.filename)
        if htmldata then
            local features, languages, scripts, options = { }, { }, { }, { }
            local sorted = table.sortedkeys(htmldata.scripts)
            for k=1,#sorted do
                local v = sorted[k]
                local s = fonts.handlers.otf.tables.scripts[v] or v
                if detail and v == detail.script then
                    scripts[#scripts+1] = formatters["<input title='%s' id='s-%s' type='radio' name='script' value='%s' onclick='check_script()' checked='checked'/>&nbsp;<span id='t-s-%s'>%s</span>"](s,v,v,v,v)
                else
                    scripts[#scripts+1] = formatters["<input title='%s' id='s-%s' type='radio' name='script' value='%s' onclick='check_script()' />&nbsp;<span id='t-s-%s'>%s</span>"](s,v,v,v,v)
                end
            end
            local sorted = table.sortedkeys(htmldata.languages)
            for k=1,#sorted do
                local v = sorted[k]
                local l = fonts.handlers.otf.tables.languages[v] or v
                if detail and v == detail.language then
                    languages[#languages+1] = formatters["<input title='%s' id='l-%s' type='radio' name='language' value='%s' onclick='check_language()' checked='checked'/>&nbsp;<span id='t-l-%s'>%s</span>"](l,v,v,v,v)
                else
                    languages[#languages+1] = formatters["<input title='%s' id='l-%s' type='radio' name='language' value='%s' onclick='check_language()' />&nbsp;<span id='t-l-%s'>%s</span>"](l,v,v,v,v)
                end
            end
            local sorted = table.sortedkeys(htmldata.features)
            for k=1,#sorted do
                local v = sorted[k]
                local f = fonts.handlers.otf.tables.features[v] or v
                if detail and detail["f-"..v] then
                    features[#features+1] = formatters["<input title='%s' id='f-%s' type='checkbox' name='f-%s' onclick='check_feature()' checked='checked'/>&nbsp;<span id='t-f-%s'>%s</span>"](f,v,v,v,v)
                else
                    features[#features+1] = formatters["<input title='%s' id='f-%s' type='checkbox' name='f-%s' onclick='check_feature()' />&nbsp;<span id='t-f-%s'>%s</span>"](f,v,v,v,v)
                end
            end
            for k=1,#what_options do
                local v = what_options[k]
                if detail and detail["o-"..v] then
                    options[#options+1] = formatters["<input id='o-%s' type='checkbox' name='o-%s' checked='checked'/>&nbsp;%s"](v,v,v)
                else
                    options[#options+1] = formatters["<input id='o-%s' type='checkbox' name='o-%s'/>&nbsp;%s"](v,v,v)
                end
            end
            local e = edit_template(
                detail and detail.sampletext or sample_line,
                detail and detail.name or "no name",
                detail and detail.title or "",
                concat(scripts,"  "),
                concat(languages,"  "),
                concat(features,"  "),
                concat(options,"  ")
            )
            if tempname then
                local pdffile, texfile = file.replacesuffix(tempname,"pdf"), file.replacesuffix(tempname,"tex")
                local r = result_template(pdffile,texfile,pdffile,runtime and formatters["%0.3f"](runtime) or "-")
                return main_template(currentfont,e,r), htmldata.javascript or ""
            else
                return main_template(currentfont,e,""), htmldata.javascript or ""
            end
        else
            return "error, nothing set up yet"
        end
    else
        return "error, no info about font"
    end
end

local function process_font(currentfont,detail) -- maybe just fontname
    local features = {
        "mode=node",
        formatters["language=%s"](detail.language or "dflt"),
        formatters["script=%s"](detail.script or "dflt"),
    }
    for k,v in next, detail do
        local f = match(k,"^f%-(.*)$")
        if f then
            features[#features+1] = formatters["%s=yes"](f)
        end
    end
    local variant = process_templates.default
    if detail["o-trace"] then
        variant = process_templates.trace
    end
    local sample = string.strip(detail.sampletext or "")
    if sample == "" then sample = sample_line end
    report("sample text: %s",sample)
    dir.mkdirs(temppath)
    local tempname = makename(tempname,true)
    local usedname = file.addsuffix(tempname,"tex")
    local fullname = file.join(temppath,usedname)
    local data = variant(concat(features,","),currentfont,sample,currentfont,sample)
    io.savedata(fullname,data)
    io.flush()
    local runtime = runcontext(temppath,usedname)
    return edit_font(currentfont,detail,tempname,runtime)
end

local tex_template = formatters [ [[
<h1>Font: %s</h1><br/>
<pre><tt>
%s
</tt></pre>
]] ]

local function show_source(currentfont,detail)
    local tempname = makename(tempname)
    if tempname and tempname ~= "" then
        local data = io.loaddata(file.join(temppath,file.replacesuffix(tempname,"tex"))) or "no source yet"
        return tex_template(currentfont,data)
    else
        return "no source file"
    end
end

local function show_log(currentfont,detail)
    local tempname = makename(tempname)
    if tempname and tempname ~= "" then
        local data = io.loaddata(file.join(temppath,file.replacesuffix(tempname,'log'))) or "no log file yet"
        data = gsub(data,"[%s%%]*begin of optionfile.-end of optionfile[%s%%]*","\n")
        return tex_template(currentfont,data)
    else
        return "no log file"
    end
end

-- much nicer would be an lmx template

local function show_font(currentfont,detail)
    local specification = get_specification(currentfont)
    local features = fonts.helpers.getfeatures(specification.filename)
    local result = { }
    result[#result+1] = formatters["<h1>Font: %s</h1><br/>"](currentfont)
    result[#result+1] = "<table>"
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>fontname   </td><td style='width:20em'>%s</td>"]     (specification.fontname   or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>designsize </td><td style='width:20em'>%s</td></tr>"](specification.designsize or "-")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>fullname   </td><td style='width:20em'>%s</td>"]     (specification.fullname   or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>minimumsize</td><td style='width:20em'>%s</td></tr>"](specification.minsize    or "-")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>filename   </td><td style='width:20em'>%s</td>"]     (specification.fontfile   or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>maximumsize</td><td style='width:20em'>%s</td></tr>"](specification.maxsize    or "-")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>rawname    </td><td style='width:20em'>%s</td>"]     (specification.rawname    or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>fontweight </td><td style='width:20em'>%s</td></tr>"](specification.fontweight or "-")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>familyname </td><td style='width:20em'>%s</td>"]     (specification.familyname or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>angle      </td><td style='width:20em'>%s</td></tr>"](specification.angle      or "-")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>subfamily  </td><td style='width:20em'>%s</td>"]     (specification.subfamily  or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>variant    </td><td style='width:20em'>%s</td></tr>"](specification.variant    ~= "" and specification.variant   or "normal")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>format     </td><td style='width:20em'>%s</td>"]     (specification.format     or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>style      </td><td style='width:20em'>%s</td></tr>"](specification.style      ~= "" and specification.style     or "normal")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>pfmwidth   </td><td style='width:20em'>%s</td>"]     (specification.pfmwidth   ~= "" and specification.pfmwidth  or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>weight     </td><td style='width:20em'>%s</td></tr>"](specification.weight     ~= "" and specification.weight    or "normal")
    result[#result+1] = formatters["<tr><td class='tc' style='width:10em'>pfmheight  </td><td style='width:20em'>%s</td>"]     (specification.pfmweight  ~= "" and specification.pfmweight or "-")
    result[#result+1] = formatters["    <td class='tc' style='width:10em'>width      </td><td style='width:20em'>%s</td></tr>"](specification.width      ~= "" and specification.width     or "normal")
    result[#result+1] = "</table>"
    if features then
        for what, v in table.sortedhash(features) do
            local data = features[what]
            if data and next(data) then
                result[#result+1] = formatters["<h1>%s features</h1><br/>"](what)
                result[#result+1] = "<table>"
                result[#result+1] = "<tr><th>feature</th><th>tag&nbsp;</th><th>script&nbsp;</th><th>languages&nbsp;</th></tr>"
                for f,ff in table.sortedhash(data) do
                    local done = false
                    for s, ss in table.sortedhash(ff) do
                        if s == "*"  then s       = "all" end
                        if ss  ["*"] then ss["*"] = nil ss.all = true end
                        if done then
                            f = ""
                        else
                            done = true
                        end
                        local title = fonts.handlers.otf.tables.features[f] or ""
                        result[#result+1] = formatters["<tr><td width='50%%'>%s&nbsp;&nbsp;</td><td><tt>%s&nbsp;&nbsp;</tt></td><td><tt>%s&nbsp;&nbsp;</tt></td><td><tt>%s&nbsp;&nbsp;</tt></td></tr>"](title,f,s,concat(table.sortedkeys(ss)," "))
                    end
                end
                result[#result+1] = "</table>"
            end
        end
    else
        result[#result+1] = "<br/><br/>This font has no features."
    end
    return concat(result,"\n")
end

local info_template = formatters [ [[
<pre><tt>
version   : %s
comment   : %s
author    : %s
copyright : %s

maillist  : ntg-context at ntg.nl
webpage   : www.pragma-ade.nl
wiki      : contextgarden.net
</tt></pre>
]] ]

local function info_about()
    local m = modules ['mtx-server-ctx-fonttest']
    return info_template(m.version,m.comment,m.author,m.copyright)
end

local save_template = formatters [ [[
    the current setup has been saved:
    <br/> <br/>
    <table>
    <tr><td class='tc'>name&nbsp;      </td><td>%s</td></tr>
    <tr><td class='tc'>title&nbsp;     </td><td>%s</td></tr>
    <tr><td class='tc'>font&nbsp;      </td><td>%s</td></tr>
    <tr><td class='tc'>script&nbsp;    </td><td>%s</td></tr>
    <tr><td class='tc'>language&nbsp;  </td><td>%s</td></tr>
    <tr><td class='tc'>features&nbsp;  </td><td>%s</td></tr>
    <tr><td class='tc'>options&nbsp;   </td><td>%s</td></tr>
    <tr><td class='tc'>sampletext&nbsp;</td><td>%s</td></tr>
    </table>
]] ]

local function loadbase()
    local datafile = file.join(basepath,basename)
    local storage = io.loaddata(datafile) or ""
    if storage == "" then
        storage = { }
    else
        report("loading '%s'",datafile)
        storage = loadstring(storage)
        storage = (storage and storage()) or { }
    end
    return storage
end

local function loadstored(detail,currentfont,name)
    local storage = loadbase()
    storage = storage and storage[name]
    if storage then
        currentfont = storage.font
        detail.script = storage.script or detail.script
        detail.language = storage.language or detail.language
        detail.title = storage.title or detail.title
        detail.sampletext = storage.text or detail.sampletext
        detail.name = name or "no name"
        for k,v in next, storage.features do
            detail["f-"..k] = v
        end
        for k,v in next, storage.options do
            detail["o-"..k] = v
        end
    end
    detail.loadname = nil
    return detail, currentfont
end

local function savebase(storage,name)
    local datafile = file.join(basepath,basename)
    report("saving '%s' in '%s'",name or "data",datafile)
    io.savedata(datafile,table.serialize(storage,true))
end

local function deletestored(detail,currentfont,name)
    local storage = loadbase()
    if storage and name and storage[name] then
        report("deleting '%s' from base",name)
        storage[name] = nil
        savebase(storage)
    end
    detail.deletename = nil
    return detail, ""
end

local function save_font(currentfont,detail)
    local specification = get_specification(currentfont)
    local name, title, script, language, features, options, text = currentfont, "", "dflt", "dflt", { }, { }, ""
    if detail then
        local htmldata = showfeatures(specification.filename)
        script = detail.script or script
        language = detail.language or language
        text = string.strip(detail.sampletext or text)
        name = string.strip(detail.name or name)
        title = string.strip(detail.title or title)
        for k,v in next, htmldata.features do
            if detail["f-"..k] then features[k] = true end
        end
        for k=1,#what_options do
            local v = what_options[k]
            if detail["o-"..v] then options[k] = true end
        end
    end
    if name == "" then
        name = "no name"
    end
    local storage = loadbase()
    storage[name] = {
        font = currentfont, title = title, script = script, language = language, features = features, options = options, text = text,
    }
    savebase(storage,name)
    return save_template(name,title,currentfont,script,language,concat(table.sortedkeys(features)," "),concat(table.sortedkeys(options)," "),text)
end

local function load_font(currentfont)
    local datafile = file.join(basepath,basename)
    local storage = loadbase(datafile)
    local result = {}
    result[#result+1] = "<tr><th>del&nbsp;</th><th>name&nbsp;</th><th>font&nbsp;</th><th>fontname&nbsp;</th><th>script&nbsp;</th><th>language&nbsp;</th><th>features&nbsp;</th><th>title&nbsp;</th><th>sampletext&nbsp;</th></tr>"
    for k,v in table.sortedhash(storage) do
        local fontname, fontfile = get_specification(v.font)
        result[#result+1] = formatters["<tr><td><a href='mtx-server-ctx-fonttest.lua?deletename=%s'>x</a>&nbsp;</td><td><a href='mtx-server-ctx-fonttest.lua?loadname=%s'>%s</a>&nbsp;</td><td>%s&nbsp;</td<td>%s&nbsp;</td><td>%s&nbsp;</td><td>%s&nbsp;</td><td>%s&nbsp;</td><td>%s&nbsp;</td><td>%s&nbsp;</td></tr>"](
            k,k,k,v.font,fontname,v.script,v.language,concat(table.sortedkeys(v.features)," "),v.title or "no title",v.text or "")
    end
    if #result == 1 then
        return "nothing saved yet"
    else
        return formatters["<table>%s</table>"](concat(result,"\n"))
    end
end

local function reset_font(currentfont)
    return edit_font(currentfont)
end

local extras_template = formatters [ [[
    <a href='mtx-server-ctx-fonttest.lua?extra=reload'>remake font database</a> (take some time)<br/><br/>
]] ]

local function do_extras(detail,currentfont,extra)
    return extras_template()
end

local extras = { }

local function do_extra(detail,currentfont,extra)
    local e = extras[extra]
    if e then e(detail,currentfont,extra) end
    return do_extras(detail,currentfont,extra)
end

function extras.reload()
    identifyfonts()
    return do_extras()
end

local status_template = formatters [ [[
    <input type="hidden" name="currentfont" value="%s" />
]] ]

local variables = {
    ['color-background-one'] = lmx.get('color-background-green'),
    ['color-background-two'] = lmx.get('color-background-blue'),
    ['title']                = 'ConTeXt Font Tester',
    ['formaction']           = "mtx-server-ctx-fonttest.lua",
}

-- todo: use lmx file

function doit(configuration,filename,hashed)

    local start = os.clock()

    local detail = url.query(hashed.query or "")

    local currentfont = detail.currentfont
    local action      = detail.action
    local selection   = detail.selection

    if action == "luajittex" then
        jitmode = true
    elseif action == "luatex" then
        jitmode = false
    end

    local loadname    = detail.loadname
    local deletename  = detail.deletename
    local extra       = detail.extra

    if loadname and loadname ~= "" then
        detail, currentfont = loadstored(detail,currentfont,loadname)
        action = "process"
    elseif deletename and deletename ~= "" then
        detail, currentfont = deletestored(detail,currentfont,deletename)
        action = "load"
    elseif selection and selection ~= "" then
        currentfont = selection
    elseif extra and extra ~= "" then
        do_extra(detail,currentfont,extra)
        action = "extras"
    end

    local fontname, fontfile = get_specification(currentfont)

    if fontfile then
        variables.title = formatters['ConTeXt Font Tester: %s (%s)'](fontname,fontfile)
    else
        variables.title = 'ConTeXt Font Tester'
    end

    if jitmode then
        variables.title = variables.title .. " (using LuaJit vm)"
    end

    -- lua table and adapt

    report("action: %s",action or "no action")

    local buttons = { 'process', 'select', 'save', 'load', 'edit', 'reset', 'features', 'source', 'log', 'info', 'extras', jitmode and "luatex" or "luajittex" }
    local menu    = { }

    for i=1,#buttons do
        local button = buttons[i]
        menu[#menu+1] = formatters["<button name='action' value='%s' type='submit'>%s</button>"](button,button)
    end

    variables.menu           = concat(menu,"&nbsp;")
    variables.status         = status_template(currentfont or "")
    variables.maintext       = ""
    variables.javascriptdata = ""
    variables.javascripts    = ""
    variables.javascriptinit = ""

    local result

    if action == "select" then
        variables.maintext = select_font()
    elseif action == "info" then
        variables.maintext = info_about()
    elseif action == "extras" then
        variables.maintext = do_extras()
    elseif currentfont and currentfont ~= "" then
        if action == "save" then
            variables.maintext = save_font(currentfont,detail)
        elseif action == "load" then
            variables.maintext = load_font(currentfont,detail)
        elseif action == "source" then
            variables.maintext = show_source(currentfont,detail)
        elseif action == "log" then
            variables.maintext = show_log(currentfont,detail)
        elseif action == "features" then
            variables.maintext = show_font(currentfont,detail)
        else
            local e, s
            if action == "process" then
                e, s = process_font(currentfont,detail)
            elseif action == "reset" then
                e, s = reset_font(currentfont)
            elseif action == "edit" then
                e, s = edit_font(currentfont,detail)
            else
                e, s = process_font(currentfont,detail)
            end
            variables.maintext       = e
            variables.javascriptdata = s
            variables.javascripts    = javascripts
            variables.javascriptinit = "check_form()"
        end
    else
        variables.maintext = select_font()
    end

    result = { content = lmx.convert('context-fonttest.lmx',false,variables) }

    report("time spent on page: %0.03f seconds",os.clock()-start)

    return result

end

return doit, true

--~ make_lmx_page("test")
