-- This is largely untested as we didn't really look at the font in detail
-- because it is in development.
--
-- todo : check first variant size after update

local common  = fonts.goodies.load("common-math.lfg")
local presets = common.mathematics.tweaks.presets

-- local integral_variants = { bottomright = -0.20 }
-- local integral_bottom   = { bottomright = -0.25 }

return {
    name = "plex-math",
    version = "1.00",
    comment = "Goodies that complement IBM Plex (beta).",
    author = "Hans Hagen & Mikael Sundqvist",
    copyright = "ConTeXt development team",
    mathematics = {
        parameters = {
         -- FractionRuleThickness             =   60,
         -- AccentTopShiftUp                  =  -25,
         -- FlattenedAccentTopShiftUp         =  -25,
         -- AccentBaseDepth                   =   30,
         -- DelimiterPercent                  =   85,
         -- DelimiterShortfall                =  400,
         -- DelimiterDisplayPercent           =   90,
         -- DelimiterDisplayShortfall         =  400,
         -- DisplayOperatorMinHeight          = 1800, -- 1333 in font
         -- SubscriptShiftDown                = 177, -- 277 in font
         -- SuperscriptShiftUp                = 0, -- 381 in font
         -- SubscriptShiftDownWithSuperscript = "1.3*SubscriptShiftDown", -- trial and error
            PrimeShiftUp                      = "1.1*SuperscriptShiftUp",
            PrimeShiftUpCramped               = "1.1*SuperscriptShiftUp",
         -- PrimeBaselineDropMax              = "0.5*SuperscriptBaselineDropMax",
        },
        tweaks = {
            aftercopying = {
                {
                    tweak    = "version",
                    expected = "Version 240212 beta",
                },
                presets.braille { },
                -- {
                --     tweak   = "fixprimes",
                --     factor  = 0.63,
                -- },
                {
                    tweak = "addmirrors",
                },
             -- presets.scripttocalligraphic { },
             -- presets.rsfstoscript         { rscale = 1.02 },
             -- presets.rsfsuprighttoscript  { rscale = 1.02 },
             -- presets.moderntocalligraphic { rscale = 1.02 },
             -- presets.eulertocalligraphic  { rscale = 1.02 },
                presets.xitsarabic           { rscale = 1.05 },
                presets.fallbacks            { },
                presets.moveitalics          { correct = true },
                presets.moveitalics          { correct = true, letters = true },
                presets.moveintegrals        { factor = 1.5 }, -- we need to check this
                presets.wipeitalics          { },
                -- We don't have italic correction in for instance math italic f which means that
                -- we also didn't fix it. Therefore we need at least some reasonable kerns. Using
                -- a dimension tweak before the above (e.g. 0.2 italic and 0.8 width) doesn't work
                -- because once the advance is set the move is blocked and the ic stil wiped. So,
                -- we kern. Actually the upright (ascii) f has italic correction.
                {
                    tweak = "checkaccents",
                },
             -- {
             --     tweak = "kerns",
             --     list  = {
             --         [0x002F]                = { topleft  = -0.2,  bottomright = -0.2  },
             --         ["0x7D.parts.top"]      = { topright = -0.15,                     }, -- right brace top
             --         ["0x7D.parts.bottom"]   = {                   bottomright = -0.15 }, -- right brace bottom
             --         ["0x7D.variants.*"]     = { topright = -0.05, bottomright = -0.05 }, -- right brace variants
             --         ["0x29.parts.top"]      = { topright = -0.15,                     }, -- right parenthesis top
             --         ["0x29.parts.bottom"]   = {                   bottomright = -0.15 }, -- right parenthesis bottom
             --         ["0x29.variants.*"]     = { topright = -0.1,  bottomright = -0.1  }, -- right parenthesis variants
             --         ["0x221A.parts.top"]    = { topright =  0.2,                      }, -- right radical top
             --         ["0x221A.parts.bottom"] = {                   bottomright =  0.2  }, -- right radical bottom
             --         ["0x221A.variants.*"]   = { topright =  0.2,  bottomright =  0.2  }, -- right radical variants
             --         [0x27E9]                = { topright = -0.1,  bottomright = -0.1  }, -- angle
             --         ["0x27E9.variants.*"]   = { topright = -0.2,  bottomright = -0.2  },
             --         [0x27EB]                = { topright = -0.1,  bottomright = -0.1  },
             --         ["0x27EB.variants.*"]   = { topright = -0.2,  bottomright = -0.2  },
             --         --
             --         [0x00393] = { bottomright = -0.30, }, -- upright Gamma
             --         --
             --         ["0x222B.parts.bottom"] = { bottomright = -0.20 }, -- int
             --         ["0x222C.parts.bottom"] = { bottomright = -0.15 }, -- iint
             --         ["0x222D.parts.bottom"] = { bottomright = -0.10 }, -- iiint
             --         ["0x2A0C.parts.bottom"] = { bottomright = -0.05 }, -- iiiint
             --     },
             -- },
             -- -- Accents are a mess. We migrate the extensibles from the combiners to the base accent
             -- -- and then need to tweak the width (which is auto set because it was zero with a large
             -- -- accent anchor offset). First we copy and fix.
                {
                    tweak = "extendaccents",
                },
             -- Needs to be done (radical broken in fonts)
             -- {
             --     tweak   = "radicaldegreeanchors",
             --     list = {
             --         [0x221A]                = { location = "left", hfactor  = .1, vfactor  = .65 },
             --         ["0x221A.variants.*"]   = { location = "left", hfactor  = .1, vfactor  = .6 },
             --         ["0x221A.variants.1"]   = { location = "left", hfactor  = .1, vfactor  = .65 },
             --         ["0x221A.variants.2"]   = { location = "left", hfactor  = .1, vfactor  = .65 },
             --         ["0x221A.parts.bottom"] = { location = "left", hfactor  = .1, vfactor  = 1.1 },
             --     }
             -- },
                {
                    tweak = "flattenaccents",
                },
                {
                    tweak = "fixaccents",
                },
                {
                    tweak = "copyaccents",
                },
                presets.addmathkerns { },
                {
                    tweak = "checkspacing",
                },
                {
                    tweak = "addscripts",
                },
                {
                    tweak = "accentdimensions",
                },
                -- Assume the font will be complete
                -- {
                --     tweak = "addrules",
                -- },
                -- Maybe not, since font is squarish
             -- {
             --     tweak    = "replacerules",
             --     fraction = { height = .254, yoffset = .746, leftoffset = .1, rightoffset = .1,  },
             --     radical  = { height = .17, leftoffset = .1, rightoffset = .1, yoffset = .485, yscale = .65  },
             --     stacker  = { height = .254, yoffset = .746 },
             -- },
                {
                    tweak = "wipecues",
                },
             -- {
             --     tweak   = "addbars",
             --     advance = 0.175,
             -- },
                {
                    tweak = "addactuarian",
                },
                {
                    tweak = "addequals",
                },
                {
                    tweak   = "addfourier",
                    variant = 1,
                },
                {
                    tweak = "addprimed",
                },
                -- this is the mkiv section
                {
                    tweak   = "emulatelmtx",
                    feature = "emulatelmtx",
                    comment = "this is for mkiv",
                },
            },
        },
        alternates = {
            dotless = { feature = 'dtls', value = 1, comment = "Mathematical Dotless Forms" },
        },
        bigslots = {
            2, 4, 6, 9
        },
    },
}