| Index: LayoutTests/fast/css/invalidation/fieldset-disabled.html
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| diff --git a/LayoutTests/fast/css/invalidation/fieldset-disabled.html b/LayoutTests/fast/css/invalidation/fieldset-disabled.html
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| new file mode 100644
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| index 0000000000000000000000000000000000000000..37ea2e404635ebad7ae568b2dcea2b39ec33756c
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| --- /dev/null
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| +++ b/LayoutTests/fast/css/invalidation/fieldset-disabled.html
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| @@ -0,0 +1,42 @@
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| +<!DOCTYPE html>
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| +<script src="../../../resources/js-test.js"></script>
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| +<style>
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| +fieldset:disabled { background-color: green }
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| +fieldset + div { color: pink }
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| +</style>
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| +<fieldset id="fieldset">
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| +    <legend></legend>
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| +    <label for="field"></label>
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| +    <input type="text" name="field" id="field">
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| +    <div>
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| +        <div></div>
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| +        <div></div>
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| +        <div></div>
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| +        <div></div>
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| +    </div>
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| +</fieldset>
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| +<div>
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| +    <div></div>
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| +    <div></div>
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| +    <div></div>
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| +    <div></div>
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| +</div>
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| +<script>
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| +description("Use descendant invalidation set for :disabled fieldset.")
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| +
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| +var transparent = "rgba(0, 0, 0, 0)";
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| +var green = "rgb(0, 128, 0)";
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| +
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| +shouldBe("getComputedStyle(fieldset, '').backgroundColor", "transparent");
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| +
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| +fieldset.offsetTop; // Force recalc.
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| +fieldset.disabled = true;
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| +
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| +if (window.internals) {
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| +    // There are still instances of SubtreeStyleChange left when updating
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| +    // disabled state. This count should become lower.
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| +    shouldBe("internals.updateStyleAndReturnAffectedElementCount()", "7");
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| +}
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| +
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| +shouldBe("getComputedStyle(fieldset, '').backgroundColor", "green");
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| +</script>
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| 
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