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

local integral_variants = {  bottomright = -0.20 }
local integral_bottom   = {  bottomright = -0.30 }

return {
    name = "termes-math",
    version = "1.00",
    comment = "Goodies that complement termes.",
    author = "Hans Hagen & Mikael Sundqvist",
    copyright = "ConTeXt development team",
    mathematics = {
        parameters = {
            AccentTopShiftUp                  =  -15,
            FlattenedAccentTopShiftUp         =  -15,
            AccentBaseDepth                   =   50,
            DelimiterPercent                  =   85,
            DelimiterShortfall                =  400,
            DelimiterDisplayPercent           =   90,
            DelimiterDisplayShortfall         =  400,
            DisplayOperatorMinHeight          = 1800, -- 1300 in font (only one)
            SuperscriptShiftUp                =  310, -- 339
            SubscriptShiftDown                =  200, -- 222
            SubscriptShiftDownWithSuperscript = "1.40*SubscriptShiftDown", -- 1.5* in math-act
            PrimeShiftUp                      = "1.35*SuperscriptShiftUp",
            PrimeShiftUpCramped               = "1.35*SuperscriptShiftUp",
        },
        tweaks = {
            aftercopying = {
                {
                    tweak    = "version",
                    expected = "Version 1.543",
                },
                {
                    tweak   = "fixprimes",
                    factor  = 0.76,
                },
                {
                    tweak = "addmirrors",
                },
                {
                    tweak   = "replacealphabets",
                    list    = {
                        {
                            source   = { first = 0x02980 }, -- triplebar
                            filename = "TeXGyreTermesMath-Companion.otf",
                        },
                    },
                },
                presets.scripttocalligraphic { },
                presets.rsfstoscript         { rscale  = 0.97 },
                presets.rsfsuprighttoscript  { rscale  = 0.97 },
                presets.moderntocalligraphic { rscale  = 0.97 },
                presets.eulertocalligraphic  { rscale  = 0.97 },
                presets.xitsarabic           { rscale  = 0.88 },
                presets.fallbacks            { },
                presets.moveitalics          { correct = true },
                presets.moveitalics          { correct = true, letters = true },
                presets.moveintegrals        { factor  = 1.5  },
                presets.wipeitalics          { },
                {
                    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 = -0.1,  bottomright = -0.1  }, -- right brace variants
                        ["0x29.parts.top"]      = { topright = -0.1,                      }, -- right parenthesis top
                        ["0x29.parts.bottom"]   = {                   bottomright = -0.1  }, -- right parenthesis bottom
                        ["0x29.variants.*"]     = { topright = -0.15, bottomright = -0.15 }, -- 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 = -0.20, }, -- 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",
                },
                {
                    tweak = "flattenaccents",
                },
                {
                    tweak = "fixaccents",
                },
                {
                    tweak   = "radicaldegreeanchors",
                    list = {
                        [0x221A]                = { location = "left", hfactor  = 0.0, vfactor = 0.6 },
                        ["0x221A.variants.*"]   = { location = "left", hfactor  = 0.0, vfactor = 0.6 },
                        ["0x221A.parts.bottom"] = { location = "left", hfactor  = 0.05, vfactor  = 1.1 },
                    }
                },
                -- First we set the dimensions of the initial accent which started out as zero but we want
                -- a proper width.
                -- {
                --     tweak = "dimensions",
                --     list  = {
                --         [0x00302] = { width = 1.4, anchor = 1.20, xoffset =  .10 }, -- widehat
                --         [0x00303] = { width = 1.4, anchor = 1.20, xoffset =  .10 }, -- widetilde
                --         [0x00306] = { width = 1.4, anchor = 1.20, xoffset =  .10 }, -- widebreve
                --         [0x0030C] = { width = 1.4, anchor = 1.20, xoffset = .10 }, -- widecheck
                --     },
                -- },
                -- Then we deal with all offsets and heights in one go. So we treat the initial accent
                -- as well as the variants here. Not in termes.
                -- We now copy these to the not wide slots so that we can set these to stretch as well,
                -- if only because it is less confusing and more consistent.
                {
                    tweak = "copyaccents",
                },
                -- So far for the accents.
                presets.addmathkerns { },
                {
                    tweak = "checkspacing",
                },
                {
                    tweak = "addscripts",
                },
                {
                    tweak = "accentdimensions",
                },
                {
                    tweak = "addrules",
                },
                {
                    tweak    = "replacerules",
                    fraction = { height = .2, xleftoffset = .115, xrightoffset = .115, yoffset = .81 },
                    radical  = { height = .2, leftoffset = .115, rightoffset = .115, yoffset = .81 },
                    stacker  = { height = .2, xleftoffset = .115, xrightoffset = .115, yoffset = .81 },
                },
                -- {
                --     tweak    = "replacerules",
                --  -- minus    = true, -- we have an extensible
                --     fraction = { height = .2, yoffset = .8 },
                --     radical  = { height = .2, yoffset = .8 },
                --     stacker  = { height = .2, yoffset = .8 },
                -- },
                -- {
                --     tweak   = "addbars",
                --     advance = 0.3,
                -- },
                {
                    tweak = "addactuarian",
                },
                {
                    tweak = "addprimed",
                },
                {
                    tweak = "addequals",
                },
                {
                    tweak = "addfourier",
                    variant = 1,
                },
                -- this is the mkiv section
                {
                    tweak   = "emulatelmtx",
                    feature = "emulatelmtx",
                    comment = "this is for mkiv",
                },
            },
        },
        bigslots = {
            1, 3, 5, 7
        },
        alternates = {
            dotless = { feature = 'dtls', value = 1, comment = "Mathematical Dotless Forms" },
        },
    },
}