Pure location assignment (#4352)

3 files changed, 149 insertions, 0 deletions

diff --git a/tests/suite/introspection/counter.typ b/tests/suite/introspection/counter.typ
index 8a5315f9..c0b17921 100644
--- a/tests/suite/introspection/counter.typ
+++ b/tests/suite/introspection/counter.typ
@@ -76,3 +76,31 @@ At Beta, it was #context {
 // Hint: 2-28 try wrapping this in a `context` expression
 // Hint: 2-28 the `context` expression should wrap everything that depends on this function
 #counter("key").at(<label>)
+
+--- issue-2480-counter-reset ---
+#let q = counter("question")
+#let step-show =  q.step() + q.display("1")
+#let g = grid(step-show, step-show, gutter: 2pt)
+
+#g
+#pagebreak()
+#step-show
+#q.update(10)
+#g
+
+--- issue-2480-counter-reset-2 ---
+#set block(spacing: 3pt)
+#let c = counter("c")
+#let foo() = context {
+  c.step()
+  c.display("1")
+  str(c.get().first())
+}
+
+#foo()
+#block(foo())
+#foo()
+#foo()
+#block(foo())
+#block(foo())
+#foo()
diff --git a/tests/suite/layout/measure.typ b/tests/suite/layout/measure.typ
index 10c3c818..71a6b32a 100644
--- a/tests/suite/layout/measure.typ
+++ b/tests/suite/layout/measure.typ
@@ -20,3 +20,75 @@
   assert(d2.width < 400pt)
   assert(d2.height > 50pt)
 }
+
+--- measure-counter-width ---
+// Measure a counter. Tests that the introspector-assisted location assignment
+// is able to take `here()` from the context into account to find the closest
+// matching element instaed of any single one. Crucially, we need to reuse
+// the same `context c.display()` to get the same span, hence `it`.
+#let f(it) = context [
+  Is #measure(it).width wide: #it \
+]
+
+#let c = counter("c")
+#let it = context c.display()
+
+#c.update(10000)
+#f(it)
+#c.update(100)
+#f(it)
+#c.update(1)
+#f(it)
+
+--- measure-citation-in-flow ---
+// Try measuring a citation that appears inline with other stuff. The
+// introspection-assisted location assignment will ensure that the citation
+// in the measurement is matched up with the real one.
+#context {
+  let it = [@netwok]
+  let size = measure(it)
+  place(line(length: size.width))
+  v(1mm)
+  it + [ is cited]
+}
+
+#show bibliography: none
+#bibliography("/assets/bib/works.bib")
+
+--- measure-citation-in-flow-different-span ---
+// When the citation has a different span, it stops working.
+#context {
+  // Error: 22-29 cannot format citation in isolation
+  // Hint: 22-29 check whether this citation is measured without being inserted into the document
+  let size = measure[@netwok]
+  place(line(length: size.width))
+  v(1mm)
+  [@netwok is cited]
+}
+
+#show bibliography: none
+#bibliography("/assets/bib/works.bib")
+
+--- measure-citation-deeply-nested ---
+// Nested the citation deeply to test that introspector-assisted measurement
+// is able to deal with memoization boundaries.
+#context {
+  let it = box(pad(x: 5pt, grid(stack[@netwok])))
+  [#measure(it).width]
+  it
+}
+
+#show bibliography: none
+#bibliography("/assets/bib/works.bib")
+
+--- measure-counter-multiple-times ---
+// When the thing we measure appears multiple times, we measure as if it was
+// the first one.
+#context {
+  let c = counter("c")
+  let u(n) = c.update(n)
+  let it = context c.get().first() * h(1pt)
+  let size = measure(it)
+  table(columns: 5, u(17), it, u(1), it, u(5))
+  [#size.width] // 17pt
+}
diff --git a/tests/suite/layout/table.typ b/tests/suite/layout/table.typ
index 4090ef95..fe138f60 100644
--- a/tests/suite/layout/table.typ
+++ b/tests/suite/layout/table.typ
@@ -139,6 +139,55 @@
   [G], [H]
 )
 
+--- table-contextual-measurement ---
+// Test that table cells with varying contextual results are properly
+// measured.
+#let c = counter("c")
+#let k = context square(width: c.get().first() * 5pt)
+#let u(n) = [#n] + c.update(n)
+#table(
+  columns: 3,
+  u(1), k, u(2),
+  k, u(4), k,
+  k, k, k,
+)
+
+--- table-header-citation ---
+#set page(height: 60pt)
+#table(
+  table.header[@netwok],
+  [A],
+  [A],
+)
+
+#show bibliography: none
+#bibliography("/assets/bib/works.bib")
+
+--- table-header-counter ---
+#set page(height: 60pt)
+#let c = counter("c")
+#table(
+  table.header(c.step() + context c.display()),
+  [A],
+  [A],
+)
+
+--- table-header-footer-madness ---
+#set page(height: 100pt)
+#let c = counter("c")
+#let it = context c.get().first() * v(10pt)
+#table(
+  table.header(c.step()),
+  [A],
+  [A],
+  [A],
+  [A],
+  [A],
+  [A],
+  [A],
+  table.footer(it),
+)
+
 --- table-cell-override ---
 // Cell override
 #table(