Blitz - WPT: text-wrap-balance-line-clamp-006.html

wpt / css / css-text / white-space / text-wrap-balance-line-clamp-006.html

/css/css-text/white-space/text-wrap-balance-line-clamp-006.html

<!DOCTYPE html>
<title>CSS test: balancing and line-clamp</title>
<meta charset="utf-8">
<link rel='author' title='Andreu Botella' href='mailto:abotella@igalia.com'>
<link rel='help' href='https://drafts.csswg.org/css-overflow-4/#line-clamp'>
<link rel='help' href='https://drafts.csswg.org/css-text-4/#text-wrap-style'>
<meta name="assert" content="If the element is affected by line-clamp, the clamping effect is applied first, then the remaining lines are balanced. If the clamp point is at the end of the line-clamp container, no ellipsis is shown, and so the width it would otherwise have does not affect the balancing.">
<link rel='match' href="reference/text-wrap-balance-line-clamp-006-ref.html">
<style>
div {
    border: solid;
    font-family: monospace;
    font-size: 4rem;
    line-height: 1rem;
    margin: 1ch;
    width: calc(15.1ch / 4); /* fits 15.1 characters at the span's font-size */
}
div span {
  font-size: 1rem;
}
.test {
    border-color: blue;

    text-wrap-style: balance;
    line-clamp: 2;
    /* This code is unnecessary in any browser that supports the unprefixed version of line-clamp,
        but neither does it have any detrimental effect,
        and it broadens the test to browsers that only support the prefixed version */

    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.ref {
    border-color: orange;
}
</style>

<p>Test passes if the box with a blue frame is identical to the orange one.

<div class="test">
  <span>1 2 3 4 5 6 7 8 9 0 1 2</span>
</div>

<div class="ref">
  <span>1 2 3 4 5 6 <br> 7 8 9 0 1 2</span>
</div>

<!--
Since the clamp point is at the end of the line-clamp container, the ellipsis
must not be shown, and it must not affect the balancing. Therefore the optimal
balancing must be:
    |---------------|
    |1 2 3 4 5 6    |
    |7 8 9 0 1 2    |
    |---------------|

Whereas if the ellipsis was taken into account, since its width is 4 times the
width of characters inside the <span>, it would result in this balancing:
    |---------------|
    |1 2 3 4 5 6 7  |
    |8 9 0 1 2....  |
    |---------------|
-->

/css/css-text/white-space/reference/text-wrap-balance-line-clamp-006-ref.html

<!DOCTYPE html>
<html lang="en" >
<meta charset="utf-8">
<title>CSS Test reference</title>
<link rel='author' title='Andreu Botella' href='mailto:abotella@igalia.com'>
<style>
div {
    border: solid;
    font-family: monospace;
    font-size: 4rem;
    line-height: 1rem;
    margin: 1ch;
    width: calc(15.1ch / 4);
}
div span {
  font-size: 1rem;
}
.test {
    border-color: blue;
}
.ref {
    border-color: orange;
}
</style>

<p>Test passes if the box with a blue frame is identical to the orange one.

<div class="test">
  <span>1 2 3 4 5 6 <br> 7 8 9 0 1 2</span>
</div>

<div class="ref">
  <span>1 2 3 4 5 6 <br> 7 8 9 0 1 2</span>
</div>