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Code Issues Projects Releases Packages Wiki Activity Actions 9

LibWeb: Mark relevant properties as "positional-value-list-shorthands"

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Some shorthand properties work differently to normal in that mapping of
provided values to longhands isn't necessarily 1-to-1 and depends on the
number of values provided, for example `margin`, `border-width`, `gap`,
etc.

These properties have distinct behaviors in how they are parsed and
serialized, having them marked allows us to implement theses behaviors
in a generic way.

No functionality changes.
This commit is contained in:
Callum Law 2025-07-10 20:21:45 +12:00 • committed by Sam Atkins
commit 9ed85ddd63
Notes: github-actions[bot] 2025-07-15 13:27:30 +00:00
3 changed files with 72 additions and 16 deletions
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20
Libraries/LibWeb/CSS/Properties.json
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@ -509,6 +509,7 @@
"border-block-color": {
"inherited": false,
"initial": "currentcolor",
"positional-value-list-shorthand": true,
"longhands": [
"border-block-start-color",
"border-block-end-color"
@ -581,6 +582,7 @@
"border-block-style": {
"inherited": false,
"initial": "none",
"positional-value-list-shorthand": true,
"longhands": [
"border-block-start-style",
"border-block-end-style"
@ -593,6 +595,7 @@
"border-block-width": {
"inherited": false,
"initial": "medium",
"positional-value-list-shorthand": true,
"longhands": [
"border-block-start-width",
"border-block-end-width"
@ -679,6 +682,7 @@
"border-color": {
"affects-layout": false,
"initial": "currentcolor",
"positional-value-list-shorthand": true,
"longhands": [
"border-top-color",
"border-right-color",
@ -791,6 +795,7 @@
"border-inline-color": {
"inherited": false,
"initial": "currentcolor",
"positional-value-list-shorthand": true,
"longhands": [
"border-inline-start-color",
"border-inline-end-color"
@ -863,6 +868,7 @@
"border-inline-style": {
"inherited": false,
"initial": "none",
"positional-value-list-shorthand": true,
"longhands": [
"border-inline-start-style",
"border-inline-end-style"
@ -875,6 +881,7 @@
"border-inline-width": {
"inherited": false,
"initial": "medium",
"positional-value-list-shorthand": true,
"longhands": [
"border-inline-start-width",
"border-inline-end-width"
@ -1011,6 +1018,7 @@
},
"border-style": {
"initial": "none",
"positional-value-list-shorthand": true,
"longhands": [
"border-top-style",
"border-right-style",
@ -1089,6 +1097,7 @@
},
"border-width": {
"initial": "medium",
"positional-value-list-shorthand": true,
"longhands": [
"border-top-width",
"border-right-width",
@ -1767,6 +1776,7 @@
"normal"
],
"percentages-resolve-to": "length",
"positional-value-list-shorthand": true,
"longhands": [
"row-gap",
"column-gap"
@ -2018,6 +2028,7 @@
"inset": {
"inherited": false,
"initial": "auto",
"positional-value-list-shorthand": true,
"longhands": [
"top",
"right",
@ -2036,6 +2047,7 @@
},
"inset-block": {
"initial": "auto",
"positional-value-list-shorthand": true,
"longhands": [
"inset-block-start",
"inset-block-end"
@ -2066,6 +2078,7 @@
},
"inset-inline": {
"initial": "auto",
"positional-value-list-shorthand": true,
"longhands": [
"inset-inline-start",
"inset-inline-end"
@ -2212,6 +2225,7 @@
"margin": {
"inherited": false,
"initial": "0",
"positional-value-list-shorthand": true,
"longhands": [
"margin-top",
"margin-right",
@ -2233,6 +2247,7 @@
},
"margin-block": {
"initial": "0",
"positional-value-list-shorthand": true,
"longhands": [
"margin-block-start",
"margin-block-end"
@ -2277,6 +2292,7 @@
},
"margin-inline": {
"initial": "0",
"positional-value-list-shorthand": true,
"longhands": [
"margin-inline-start",
"margin-inline-end"
@ -2613,6 +2629,7 @@
"overflow-x",
"overflow-y"
],
"positional-value-list-shorthand": true,
"inherited": false,
"initial": "visible",
"max-values": 2,
@ -2639,6 +2656,7 @@
"padding": {
"inherited": false,
"initial": "0",
"positional-value-list-shorthand": true,
"longhands": [
"padding-top",
"padding-right",
@ -2657,6 +2675,7 @@
},
"padding-block": {
"initial": "0",
"positional-value-list-shorthand": true,
"longhands": [
"padding-block-start",
"padding-block-end"
@ -2695,6 +2714,7 @@
},
"padding-inline": {
"initial": "0",
"positional-value-list-shorthand": true,
"longhands": [
"padding-inline-start",
"padding-inline-end"