Source code

Revision control

Copy as Markdown

Other Tools

Test Info:

<!DOCTYPE html>
<meta charset="UTF-8">
<style>
body {
padding: 0;
margin: 0;
font-size: 2px;
line-height: 1;
}
</style>
<body>
<script>
// This is the constant in nsTextFrame.cpp of the number of lines
// which a text run can be built up to.
const NUM_LINES_TO_BUILD_TEXT_RUNS = 200;
// Since the font-size is small, we need lots of blocks so that it can
// be seen clearer whether difference is fuzzy or real failure.
let x = '\u2588'.repeat(100) + '<br>';
for (let i = 0; i < NUM_LINES_TO_BUILD_TEXT_RUNS / 2 - 1; i++) {
document.write(x)
}
// We want this piece to be in whatever place inside the first
// NUM_LINES_TO_BUILD_TEXT_RUNS lines.
document.write('あ\nあ<br>');
// And we want another NUM_LINES_TO_BUILD_TEXT_RUNS lines to check.
for (let i = 0; i < NUM_LINES_TO_BUILD_TEXT_RUNS * 1.5; i++) {
document.write(x)
}
</script>