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[anchor-position] Update layout on anchor attribute changes
This patch also adds WPTs for the anchor attribute (without popovers) to support the HTML PR whatwg/html#9144 Fixed: 1432016 Change-Id: I3e80326268008e6beaf74389bb32c01050406a81
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html/dom/elements/global-attributes/the-anchor-attribute-001.tentative.html
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| <!DOCTYPE html> | ||
| <link rel="help" href="https://github.com/whatwg/html/pull/9144"> | ||
| <link rel="author" href="mailto:xiaochengh@chromium.org"> | ||
| <script src="/resources/testharness.js"></script> | ||
| <script src="/resources/testharnessreport.js"></script> | ||
|
|
||
| <style> | ||
| body { | ||
| margin: 0; | ||
| } | ||
| #anchor { | ||
| width: 100px; | ||
| height: 100px; | ||
| margin-left: 50px; | ||
| margin-top: 50px; | ||
| background: orange; | ||
| } | ||
| #target { | ||
| position: absolute; | ||
| left: anchor(right); | ||
| top: anchor(top); | ||
| width: 100px; | ||
| height: 100px; | ||
| background: lime; | ||
| } | ||
| </style> | ||
| <div id="anchor"></div> | ||
| <div id="target" anchor="anchor"></div> | ||
|
|
||
| <script> | ||
| test(() => { | ||
| assert_equals(target.offsetLeft, 150); | ||
| assert_equals(target.offsetTop, 50); | ||
| }, 'The anchor attribute should position the target element next to its implicit anchor'); | ||
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| test(() => { | ||
| assert_equals(target.anchorElement, anchor); | ||
| }, 'The element.anchorElement IDL should reflect the element pointed to by the anchor attribute'); | ||
| </script> |
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html/dom/elements/global-attributes/the-anchor-attribute-002.tentative.html
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| <!DOCTYPE html> | ||
| <link rel="help" href="https://github.com/whatwg/html/pull/9144"> | ||
| <link rel="author" href="mailto:xiaochengh@chromium.org"> | ||
| <script src="/resources/testharness.js"></script> | ||
| <script src="/resources/testharnessreport.js"></script> | ||
|
|
||
| <style> | ||
| body { | ||
| margin: 0; | ||
| } | ||
| .anchor { | ||
| width: 100px; | ||
| height: 100px; | ||
| margin-left: 50px; | ||
| margin-top: 50px; | ||
| background: orange; | ||
| } | ||
| .target { | ||
| position: absolute; | ||
| left: anchor(right, 123px); | ||
| top: anchor(top, 456px); | ||
| width: 100px; | ||
| height: 100px; | ||
| background: lime; | ||
| } | ||
| </style> | ||
| <div class="anchor" id="anchor1"></div> | ||
| <div class="anchor" id="anchor2"></div> | ||
| <div class="target" id="target1" anchor="anchor1"></div> | ||
| <div class="target" id="target2" anchor="anchor1"></div> | ||
|
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||
| <script> | ||
| test(() => { | ||
| document.body.offsetLeft; // Force layout | ||
| target1.setAttribute('anchor', 'anchor2'); | ||
| assert_equals(target1.offsetLeft, 150); | ||
| assert_equals(target1.offsetTop, 200); | ||
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| target1.setAttribute('anchor', 'anchor1'); | ||
| assert_equals(target1.offsetLeft, 150); | ||
| assert_equals(target1.offsetTop, 50); | ||
| }, 'Layout should be updated when anchor attribute changes to another element'); | ||
|
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||
| test(() => { | ||
| document.body.offsetLeft; // Force layout | ||
| target2.setAttribute('anchor', 'nonexist-anchor'); | ||
| assert_equals(target2.offsetLeft, 123); | ||
| assert_equals(target2.offsetTop, 456); | ||
| }, 'Layout should be updated when anchor attribute changes to a non-existent element'); | ||
| </script> |