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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Cascade: rolling back the cascade with presentation hints</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="help" href="https://www.w3.org/TR/css-cascade-5/#preshint">
+<link rel="help" href="https://www.w3.org/TR/css-cascade-5/#default">
+<link rel="help" href="https://www.w3.org/TR/css-cascade-5/#revert-layer">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/embedded-content-other.html#dimension-attributes">
+<meta name="assert" content="Checks that 'revert' considers presentational hints as part of the author origin,
+ and 'revert-layer' considers them an independent origin between the user origin and the author origin.">
+
+<style>
+@layer {
+ .revert-1 {
+ width: revert;
+ height: revert;
+ }
+ .revert-layer-1 {
+ width: revert-layer;
+ height: revert-layer;
+ }
+}
+
+.revert-2 {
+ width: revert;
+ height: revert;
+}
+.revert-layer-2 {
+ width: revert-layer;
+ height: revert-layer;
+}
+
+.revert-3 {
+ animation: revert-3 paused 2s -1s;
+}
+.revert-layer-3 {
+ animation: revert-layer-3 paused 2s -1s;
+}
+@keyframes revert-3 {
+ from, to {
+ width: revert;
+ height: revert;
+ }
+}
+@keyframes revert-layer-3 {
+ from, to {
+ width: revert-layer;
+ height: revert-layer;
+ }
+}
+</style>
+
+<div id="log"></div>
+
+<div id="tests">
+ <!-- 'revert' considers presentational hints as part of the author origin, so it rolls back to user origin.
+ The images should then get an 'auto' size, which will use the natural size of the resource. -->
+ <img class="revert-1" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="60"
+ height="33" data-expected-client-height="60">
+ <img class="revert-2" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="60"
+ height="33" data-expected-client-height="60">
+ <img class="revert-3" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="60"
+ height="33" data-expected-client-height="60">
+ <img style="width: revert; height: revert" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="60"
+ height="33" data-expected-client-height="60">
+
+ <!-- 'revert-layer' considers presentational hints as an independent origin, so it rolls back to them.
+ The images should then get size specified in the attributes. -->
+ <img class="revert-layer-1" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33">
+ <img class="revert-layer-2" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33">
+ <img class="revert-layer-3" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33">
+ <img style="width: revert-layer; height: revert-layer" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33">
+
+ <!-- 'revert' considers presentational hints as part of the author origin, so it rolls back to user origin.
+ The iframes should then get an 'auto' size, which will default to 300x150. -->
+ <iframe class="revert-1" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="300"
+ height="33" data-expected-client-height="150"></iframe>
+ <iframe class="revert-2" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="300"
+ height="33" data-expected-client-height="150"></iframe>
+ <iframe class="revert-3" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="300"
+ height="33" data-expected-client-height="150"></iframe>
+ <iframe style="width: revert; height: revert" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="300"
+ height="33" data-expected-client-height="150"></iframe>
+
+ <!-- 'revert-layer' considers presentational hints as an independent origin, so it rolls back to them.
+ The iframes should then get size specified in the attributes. -->
+ <iframe class="revert-layer-1" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33"></iframe>
+ <iframe class="revert-layer-2" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33"></iframe>
+ <iframe class="revert-layer-3" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33"></iframe>
+ <iframe style="width: revert-layer; height: revert-layer" src="/css/support/60x60-green.png"
+ width="44" data-expected-client-width="44"
+ height="33" data-expected-client-height="33"></iframe>
+</div>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<script>
+addEventListener("load", function() {
+ checkLayout("#tests > *", false);
+ done();
+}, {once: true});
+</script>