// Test the column layouter.

--- columns-rtl ---
// Test normal operation and RTL directions.
#set page(height: 3.25cm, width: 7.05cm, columns: 2)
#set text(lang: "ar", font: ("Noto Sans Arabic", "Libertinus Serif"))
#set columns(gutter: 30pt)

#box(fill: conifer, height: 8pt, width: 6pt) وتحفيز
العديد من التفاعلات الكيميائية. (DNA) من أهم الأحماض النووية التي تُشكِّل
إلى جانب كل من البروتينات والليبيدات والسكريات المتعددة
#box(fill: eastern, height: 8pt, width: 6pt)
الجزيئات الضخمة الأربعة الضرورية للحياة.

--- columns-in-fixed-size-rect ---
// Test the `columns` function.
#set page(width: auto)

#rect(width: 180pt, height: 100pt, inset: 8pt, columns(2, [
    A special plight has befallen our document.
    Columns in text boxes reigned down unto the soil
    to waste a year's crop of rich layouts.
    The columns at least were graciously balanced.
]))

--- columns-set-page ---
// Test columns for a sized page.
#set page(height: 5cm, width: 7.05cm, columns: 2)

Lorem ipsum dolor sit amet is a common blind text
and I again am in need of filling up this page
#align(bottom, rect(fill: eastern, width: 100%, height: 12pt))
#colbreak()

so I'm returning to this trusty tool of tangible terror.
Sure, it is not the most creative way of filling up
a page for a test but it does get the job done.

--- columns-in-auto-sized-rect ---
// Test the expansion behaviour.
#set page(height: 2.5cm, width: 7.05cm)

#rect(inset: 6pt, columns(2, [
    ABC \
    BCD
    #colbreak()
    DEF
]))

--- columns-more-with-gutter ---
// Test setting a column gutter and more than two columns.
#set page(height: 3.25cm, width: 7.05cm, columns: 3)
#set columns(gutter: 30pt)

#rect(width: 100%, height: 2.5cm, fill: conifer) #parbreak()
#rect(width: 100%, height: 2cm, fill: eastern) #parbreak()
#circle(fill: eastern)

--- columns-set-page-colbreak-pagebreak ---
// Test the `colbreak` and `pagebreak` functions.
#set page(height: 1cm, width: 7.05cm, columns: 2)

A
#colbreak()
#colbreak()
B
#pagebreak()
C
#colbreak()
D

--- columns-empty-second-column ---
// Test an empty second column.
#set page(width: 7.05cm, columns: 2)

#rect(width: 100%, inset: 3pt)[So there isn't anything in the second column?]

--- columns-page-width-auto ---
// Test columns when one of them is empty.
#set page(width: auto, columns: 3)

Arbitrary horizontal growth.

--- columns-page-height-auto ---
// Test columns in an infinitely high frame.
#set page(width: 7.05cm, columns: 2)

There can be as much content as you want in the left column
and the document will grow with it.

#rect(fill: conifer, width: 100%, height: 30pt)

Only an explicit #colbreak() `#colbreak()` can put content in the
second column.

--- columns-one ---
// Test a page with a single column.
#set page(height: auto, width: 7.05cm, columns: 1)

This is a normal page. Very normal.

--- columns-zero ---
// Test a page with zero columns.
// Error: 49-50 number must be positive
#set page(height: auto, width: 7.05cm, columns: 0)

--- columns-colbreak-after-place ---
// Test colbreak after only out-of-flow elements.
#set page(width: 7.05cm, columns: 2)
#place[OOF]
#colbreak()
In flow.

--- issue-columns-heading ---
// The well-known columns bug.
#set page(height: 70pt)

Hallo
#columns(2)[
  = A
  Text
  = B
  Text
]

--- colbreak-weak ---
#set page(columns: 2)
#colbreak(weak: true)
A
#colbreak(weak: true)
B