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Use calc.rem() on Typst 0.3.0+ #115

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Merged
merged 1 commit into from
Jan 7, 2024
Merged

Use calc.rem() on Typst 0.3.0+ #115

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46 changes: 28 additions & 18 deletions src/common.typ
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Original file line number Diff line number Diff line change
Expand Up @@ -9,24 +9,6 @@

// -- compat --

#let calc-mod(a, b) = {
calc.floor(a) - calc.floor(b * calc.floor(a / b))
}

// Returns the sign of the operand.
// -1 for negative, 1 for positive or zero.
#let calc-sign(x) = {
// For positive: true - false = 1 - 0 = 1
// For zero: true - false = 1 - 0 = 1
// For negative: false - true = 0 - 1 = -1
int(0 <= x) - int(x < 0)
}

// Polyfill for array sum (.sum() is Typst 0.3.0+).
#let array-sum(arr, zero: 0) = {
arr.fold(zero, (a, x) => a + x)
}

// get the types of things so we can compare with them
// (0.2.0-0.7.0: they're strings; 0.8.0+: they're proper types)
#let _array-type = type(())
Expand All @@ -51,6 +33,34 @@
// If types aren't strings, this means we're using 0.8.0+.
#let using-typst-v080-or-later = str(type(_str-type)) == "type"

// Attachments use "t" and "b" instead of "top" and "bottom" since v0.3.0.
#let using-typst-v030-or-later = using-typst-v080-or-later or $a^b$.body.has("t")

// This is true if types have fields in the current Typst version.
// This means we can use stroke.thickness, length.em, and so on.
#let typst-fields-supported = using-typst-v080-or-later

// This is true if calc.rem exists in the current Typst version.
// Otherwise, we use a polyfill.
#let typst-calc-rem-supported = using-typst-v030-or-later

// Remainder operation.
#let calc-mod = if typst-calc-rem-supported {
calc.rem
} else {
(a, b) => calc.floor(a) - calc.floor(b * calc.floor(a / b))
}

// Returns the sign of the operand.
// -1 for negative, 1 for positive or zero.
#let calc-sign(x) = {
// For positive: true - false = 1 - 0 = 1
// For zero: true - false = 1 - 0 = 1
// For negative: false - true = 0 - 1 = -1
int(0 <= x) - int(x < 0)
}

// Polyfill for array sum (.sum() is Typst 0.3.0+).
#let array-sum(arr, zero: 0) = {
arr.fold(zero, (a, x) => a + x)
}