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[Gecko Bug 1931466] Ensure inline elements inside an empty line has zero block-size and no baseline in scrolled block frames. #49313

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merged 1 commit into from
Nov 22, 2024
Merged

[Gecko Bug 1931466] Ensure inline elements inside an empty line has zero block-size and no baseline in scrolled block frames. #49313

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11 changes: 11 additions & 0 deletions css/css-inline/empty-span-size-001-ref.html
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,16 @@
border: 1px solid;
}

.oa {
height: 100px;
}

.filler {
height: 100px;
box-sizing: border-box;
border: 1px solid;
}

ul {
margin: 0;
}
Expand All @@ -21,6 +31,7 @@
}
</style>
<div class="container"></div><br>
<div class="container oa"><div class="filler"></div></div><br>
<div class="container"><span style="border: 1px solid; border-right: 2px solid;"></span></div><br>
<div class="container"><ul><li>&nbsp;</li><li>&nbsp;</li></ul></div><br>
<div class="container"><div class="button"></div><span>&nbsp;</span></div><br>
28 changes: 28 additions & 0 deletions css/css-inline/empty-span-size-001.html
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
<!DOCTYPE html>
<html class=reftest-wait>
<link rel="author" title="David Shin" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-inline-3/#invisible-line-boxes">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1931466">
Expand All @@ -21,18 +22,45 @@
vertical-align: top;
}

.oa {
overflow: hidden;
height: 100px;
}

.filler {
height: 100px;
box-sizing: border-box;
border: 1px solid;
}

.bad {
background: red;
}

ul {
margin: 0;
}

li {
width: 0;
}

</style>
<!-- Empty inline element in empty line has a height of zero. -->
<div class="container"><span class="inline"></span></div><br>
<!-- Empty inline element should not contribute to scrollable overflow. -->
<div class="container oa">
<div class="filler bad"></div>
<span id="scrollTarget"></span>
<div class="filler"></div>
</div><br>
<!-- ... But not if the line has a meaningful height. -->
<div class="container"><span class="inline"></span><span class="has-height"></span><span class="inline"></span></div><br>
<!-- ... Or if the line is present in some kind of context that gives a meaningful height. -->
<div class="container"><ul><li></li><li></li></ul></div><br>
<div class="container"><input type="button" value=""></div><br>
<script>
scrollTarget.scrollIntoView();
document.documentElement.className = "";
</script>
</html>