mirror of
https://github.com/typst/typst
synced 2025-07-27 14:27:56 +08:00
24bac30c84
Previously there was always a short fall when scaling delimiters, even if the user requested a specific size. This is no longer the case; the short fall is only present in the default for `lr` (`x => x - 0.1em`) - the size of the delimiters is now actually what was specified in the size argument. This also makes the default for `lr` much clearer to the user. A slight hack was used by exploiting the `name` property in the `func` attribute macro so that the default value in the docs for `lr.size` would clearly show what the default function was (instead of just its name `default_lr_size` which is meaningless and inaccessible to the user).
130 lines
3.3 KiB
Rust
130 lines
3.3 KiB
Rust
use crate::foundations::{Content, Packed, elem};
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use crate::math::{EquationElem, Mathy};
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/// A base with optional attachments.
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///
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/// ```example
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/// $ attach(
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/// Pi, t: alpha, b: beta,
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/// tl: 1, tr: 2+3, bl: 4+5, br: 6,
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/// ) $
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/// ```
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#[elem(Mathy)]
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pub struct AttachElem {
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/// The base to which things are attached.
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#[required]
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pub base: Content,
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/// The top attachment, smartly positioned at top-right or above the base.
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///
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/// You can wrap the base in `{limits()}` or `{scripts()}` to override the
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/// smart positioning.
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pub t: Option<Content>,
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/// The bottom attachment, smartly positioned at the bottom-right or below
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/// the base.
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///
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/// You can wrap the base in `{limits()}` or `{scripts()}` to override the
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/// smart positioning.
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pub b: Option<Content>,
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/// The top-left attachment (before the base).
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pub tl: Option<Content>,
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/// The bottom-left attachment (before base).
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pub bl: Option<Content>,
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/// The top-right attachment (after the base).
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pub tr: Option<Content>,
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/// The bottom-right attachment (after the base).
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pub br: Option<Content>,
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}
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impl Packed<AttachElem> {
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/// If an AttachElem's base is also an AttachElem, merge attachments into the
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/// base AttachElem where possible.
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pub fn merge_base(&self) -> Option<Self> {
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// Extract from an EquationElem.
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let mut base = &self.base;
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while let Some(equation) = base.to_packed::<EquationElem>() {
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base = &equation.body;
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}
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// Move attachments from elem into base where possible.
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if let Some(base) = base.to_packed::<AttachElem>() {
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let mut elem = self.clone();
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let mut base = base.clone();
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macro_rules! merge {
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($content:ident) => {
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if !base.$content.is_set() && elem.$content.is_set() {
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base.$content = elem.$content.clone();
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elem.$content.unset();
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}
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};
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}
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merge!(t);
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merge!(b);
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merge!(tl);
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merge!(tr);
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merge!(bl);
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merge!(br);
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elem.base = base.pack();
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return Some(elem);
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}
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None
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}
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}
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/// Grouped primes.
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///
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/// ```example
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/// $ a'''_b = a^'''_b $
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/// ```
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///
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/// # Syntax
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/// This function has dedicated syntax: use apostrophes instead of primes. They
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/// will automatically attach to the previous element, moving superscripts to
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/// the next level.
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#[elem(Mathy)]
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pub struct PrimesElem {
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/// The number of grouped primes.
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#[required]
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pub count: usize,
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}
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/// Forces a base to display attachments as scripts.
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///
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/// ```example
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/// $ scripts(sum)_1^2 != sum_1^2 $
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/// ```
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#[elem(Mathy)]
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pub struct ScriptsElem {
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/// The base to attach the scripts to.
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#[required]
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pub body: Content,
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}
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/// Forces a base to display attachments as limits.
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///
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/// ```example
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/// $ limits(A)_1^2 != A_1^2 $
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/// ```
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#[elem(Mathy)]
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pub struct LimitsElem {
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/// The base to attach the limits to.
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#[required]
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pub body: Content,
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/// Whether to also force limits in inline equations.
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///
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/// When applying limits globally (e.g., through a show rule), it is
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/// typically a good idea to disable this.
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#[default(true)]
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pub inline: bool,
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}
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