Blitz - WPT: selection-background-painting-order.html

wpt / css / css-pseudo / selection-background-painting-order.html

/css/css-pseudo/selection-background-painting-order.html

<!doctype html>
<meta charset="utf-8">
<!-- see “Selection regression tests” in README.md -->
<title>CSS Pseudo-Elements Test: ::selection background always paints over unselected parts when selecting text</title>
<link rel="author" name="Delan Azabani" href="mailto:dazabani@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#highlight-painting">
<link rel="help" href="https://drafts.csswg.org/css-text-decor-4/#painting">
<link rel="help" href="https://www.w3.org/TR/CSS22/zindex.html#painting-order">
<link rel="match" href="selection-background-painting-order-ref1.html">
<link rel="match" href="selection-background-painting-order-ref2.html">
<meta name="assert" value="This test verifies that when selecting text, the ::selection background always paints over unselected parts.">
<script src="support/selections.js"></script>
<link rel="stylesheet" href="support/highlights.css">
<style>
    @font-face {
        font-family: CSSTest;
        src: url(/fonts/CSSTest/csstest-basic-italic.ttf);
    }
    main {
        font: 80px/1 CSSTest;
        margin: 0.5em;
        width: min-content;
    }
    main > span {
        background: black;
        color: orange;
    }
    main > span::selection {
        /*
            Safari on macOS: opaque selection backgrounds are made
            translucent in the used value, so we need to choose a
            background color with known but non-opaque alpha.
        */
        background: #0000FFC0;
        color: transparent;
    }
</style>
<p>Test passes if the blue rectangle below contains no proper orange, only orange dimmed by blue.
<main class="highlight_reftest"><span>ii∫∫∫</span></main>
<script>
    const target = document.querySelector("main > span");
    selectRangeWith(range => {
        range.selectNodeContents(target);
        range.setStart(target.childNodes[0], 0);
        range.setEnd(target.childNodes[0], 3);
    });
</script>

/css/css-pseudo/selection-background-painting-order-ref1.html

<!doctype html>
<meta charset="utf-8">
<link rel="author" name="Delan Azabani" href="mailto:dazabani@igalia.com">
<link rel="stylesheet" href="support/highlights.css">
<style>
    @font-face {
        font-family: CSSTest;
        src: url(/fonts/CSSTest/csstest-basic-italic.ttf);
    }
    main {
        font: 80px/1 CSSTest;
        margin: 0.5em;
        width: min-content;
    }
    .unselected {
        background: black;
    }
    .orange {
        color: orange;
    }
    .selected {
        background: #0000FFC0;
        color: transparent;
    }
</style>
<!--
    In this ref, the overhanging parts of the selected text are
    visible, being painted in orange. Gecko does this.
-->
<p>Test passes if the blue rectangle below contains no proper orange, only orange dimmed by blue.
<main class="highlight_reftest">
    <div class="hrt_layers">
        <div><span class="unselected">ii∫<span class="orange">∫∫</span></span></div>
        <div><span class="selected">ii∫</span>∫∫</div>
        ii∫∫∫
    </div>
</main>