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https://github.com/LadybirdBrowser/ladybird
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LibWeb: Correctly resolve position-area computed value
This commit is contained in:
Tim Ledbetter
committed by
Jelle Raaijmakers
Jelle Raaijmakers
parent
eb571a1a46
commit
fda5ea8277
Notes:
github-actions[bot]
2025-09-29 10:49:20 +00:00
Author: https://github.com/tcl3 Commit: https://github.com/LadybirdBrowser/ladybird/commit/fda5ea8277b Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6340 Reviewed-by: https://github.com/gmta ✅
@@ -0,0 +1,197 @@
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<!DOCTYPE html>
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<title>CSS Anchor Positioning: position-area getComputedStyle()</title>
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<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#position-area-computed">
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<script src="../../resources/testharness.js"></script>
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<script src="../../resources/testharnessreport.js"></script>
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<script src="../../css/support/computed-testcommon.js"></script>
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<script src="../../css/support/inheritance-testcommon.js"></script>
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<div id="container">
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<div id="target"></div>
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</div>
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<script>
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// Keywords that refer to the physical horizontal/vertical axes.
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const horizontal = [
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"left",
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"right",
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"span-left",
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"span-right",
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"x-start",
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"x-end",
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"span-x-start",
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"span-x-end",
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"x-self-start",
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"x-self-end",
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"span-x-self-start",
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"span-x-self-end"
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];
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const vertical = [
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"top",
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"bottom",
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"span-top",
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"span-bottom",
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"y-start",
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"y-end",
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"span-y-start",
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"span-y-end",
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"y-self-start",
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"y-self-end",
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"span-y-self-start",
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"span-y-self-end"
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];
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// Keywords that refer to the logical block/inline axis.
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// Key is the full form of the keyword, value is the equivalent reduced keyword.
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const inline = {
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"inline-start": "start",
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"inline-end": "end",
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"span-inline-start": "span-start",
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"span-inline-end": "span-end",
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}
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const block = {
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"block-start": "start",
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"block-end": "end",
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"span-block-start": "span-start",
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"span-block-end": "span-end",
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}
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const self_inline = {
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"self-inline-start": "self-start",
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"self-inline-end": "self-end",
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"span-self-inline-start": "span-self-start",
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"span-self-inline-end": "span-self-end",
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}
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const self_block = {
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"self-block-start": "self-start",
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"self-block-end": "self-end",
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"span-self-block-start": "span-self-start",
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"span-self-block-end": "span-self-end",
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}
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// Keywords that refer to an ambiguous axis.
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// Key is the keyword, value is the equivalent keyword if the original keyword refers
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// to a block or inline axis.
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const start_end = {
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"start": { "block": "block-start", "inline": "inline-start" },
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"end": { "block": "block-end", "inline": "inline-end" },
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"span-start": { "block": "span-block-start", "inline": "span-inline-start" },
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"span-end": { "block": "span-block-end", "inline": "span-inline-end" },
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};
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const self_start_end = {
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"self-start": { "block": "self-block-start", "inline": "self-inline-start" },
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"self-end": { "block": "self-block-end", "inline": "self-inline-end" },
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"span-self-start": { "block": "span-self-block-start", "inline": "span-self-inline-start" },
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"span-self-end": { "block": "span-self-block-end", "inline": "span-self-inline-end" },
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};
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function test_single_keyword(keywords) {
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for (const keyword of keywords)
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test_computed_value("position-area", keyword);
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}
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function test_physical_keywords(horizontal_keywords, vertical_keywords) {
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for (const horizontal of horizontal_keywords) {
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for (const vertical of vertical_keywords) {
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test_computed_value("position-area", `${horizontal} ${vertical}`);
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test_computed_value("position-area", `${vertical} ${horizontal}`, `${horizontal} ${vertical}`);
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}
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}
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for (const keyword of horizontal_keywords) {
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test_computed_value("position-area", `${keyword} span-all`, keyword);
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test_computed_value("position-area", `span-all ${keyword}`, keyword);
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test_computed_value("position-area", `${keyword} center`);
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test_computed_value("position-area", `center ${keyword}`, `${keyword} center`);
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}
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for (const keyword of vertical_keywords) {
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test_computed_value("position-area", `span-all ${keyword}`, keyword);
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test_computed_value("position-area", `${keyword} span-all`, keyword);
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test_computed_value("position-area", `center ${keyword}`);
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test_computed_value("position-area", `${keyword} center`, `center ${keyword}`);
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}
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}
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function test_unambiguous_logical_keywords(block_keywords, inline_keywords) {
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for (const [block_long_keyword, block_short_keyword] of Object.entries(block_keywords)) {
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for (const [inline_long_keyword, inline_short_keyword] of Object.entries(inline_keywords)) {
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let expected_computed = `${block_short_keyword} ${inline_short_keyword}`;
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if (block_short_keyword == inline_short_keyword)
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expected_computed = block_short_keyword;
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test_computed_value("position-area", `${block_long_keyword} ${inline_long_keyword}`, expected_computed);
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test_computed_value("position-area", `${inline_long_keyword} ${block_long_keyword}`, expected_computed);
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}
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}
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for (const [long_keyword, short_keyword] of Object.entries(block_keywords)) {
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test_computed_value("position-area", `${long_keyword} span-all`, long_keyword);
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test_computed_value("position-area", `span-all ${long_keyword}`, long_keyword);
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test_computed_value("position-area", `${long_keyword} center`, `${short_keyword} center`);
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test_computed_value("position-area", `center ${long_keyword}`, `${short_keyword} center`);
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}
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for (const [long_keyword, short_keyword] of Object.entries(inline_keywords)) {
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test_computed_value("position-area", `${long_keyword} span-all`, long_keyword);
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test_computed_value("position-area", `span-all ${long_keyword}`, long_keyword);
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test_computed_value("position-area", `${long_keyword} center`, `center ${short_keyword}`);
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test_computed_value("position-area", `center ${long_keyword}`, `center ${short_keyword}`);
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}
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}
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function test_ambiguous_logical_keywords(keywords) {
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for (const keyword1 of Object.keys(keywords)) {
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for (const keyword2 of Object.keys(keywords)) {
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if (keyword1 == keyword2)
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test_computed_value("position-area", `${keyword1} ${keyword2}`, `${keyword1}`);
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else
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test_computed_value("position-area", `${keyword1} ${keyword2}`);
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}
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}
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for (const [keyword, { block: block_keyword, inline: inline_keyword }] of Object.entries(keywords)) {
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test_computed_value("position-area", `${keyword} span-all`, block_keyword);
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test_computed_value("position-area", `span-all ${keyword}`, inline_keyword);
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test_computed_value("position-area", `${keyword} center`);
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test_computed_value("position-area", `center ${keyword}`);
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};
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}
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// Test computed value when position-area is a single keyword.
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test_computed_value("position-area", "none");
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test_computed_value("position-area", "span-all");
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test_computed_value("position-area", "center");
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test_single_keyword(horizontal);
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test_single_keyword(vertical);
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test_single_keyword(Object.keys(inline));
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test_single_keyword(Object.keys(block));
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test_single_keyword(Object.keys(self_inline));
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test_single_keyword(Object.keys(self_block));
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test_single_keyword(Object.keys(start_end));
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test_single_keyword(Object.keys(self_start_end));
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// Test computed value when position-area are two keywords.
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test_physical_keywords(horizontal, vertical);
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test_unambiguous_logical_keywords(block, inline);
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test_unambiguous_logical_keywords(self_block, self_inline);
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test_ambiguous_logical_keywords(start_end);
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test_ambiguous_logical_keywords(self_start_end);
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test_computed_value("position-area", "span-all span-all", "span-all");
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test_computed_value("position-area", "span-all center");
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test_computed_value("position-area", "center span-all");
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test_computed_value("position-area", "center center", "center");
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assert_not_inherited("position-area", "none", "span-all");
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</script>
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