themed-select-padding-no-clip-ref.html

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<!doctype html>

<title>Bug 1561794 - padding-inline-end does not clip display text for themed comboboxes.</title>

<style>

  select, .unthemed {

    font: 16px / 1 monospace;

    width: 20ch;

    display: block;

  .unthemed {

    box-sizing: border-box;

    border: 1px solid grey;

</style>

<!--- Ensure the text isn't chopped -->

<select><option>XXXXXXXXXXXX</option></select>

<select><option>X XXXXXXXXXX</option></select>

<!--- Test that the display text doesn't overflow the select. -->

<select style="overflow: hidden"><option>XXXXXXXXXXXXXXXXXX</option></select>

<!-- Test that this only affects themed comboboxes -->

<div class="unthemed" style="padding-right: 15ch"><div style="padding: 1px 4px; overflow: hidden;">XXXXXXXXXX</div></div>

<select id="src" style="padding-left: 10ch; padding-right: 10ch"><option>XXXXXXXXXX</option></select>

<select id="ref" style="padding-left: 10ch;"><option>XXXXXXXXXX</option></select>

<script>

  // This one is a bit special, because we want `ref` to have the same size as

  // `src`, which for some reason, with or without the patch for this bug,

  // grows outside the specified width. Given this width depends on scrollbar,

  // width, which is platform dependent, we just calculate it from `src`, and

  // then hide it.

//

  // We just really want to test that the padding right doesn't clip the text

  // anyhow.

  ref.style.width = getComputedStyle(src).width;

  src.style.display = "none";

</script>