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Diffstat (limited to 'node_modules/postcss-merge-longhand/src/lib/decl/borders.js')
| -rw-r--r-- | node_modules/postcss-merge-longhand/src/lib/decl/borders.js | 860 |
1 files changed, 860 insertions, 0 deletions
diff --git a/node_modules/postcss-merge-longhand/src/lib/decl/borders.js b/node_modules/postcss-merge-longhand/src/lib/decl/borders.js new file mode 100644 index 00000000..2a2c0deb --- /dev/null +++ b/node_modules/postcss-merge-longhand/src/lib/decl/borders.js @@ -0,0 +1,860 @@ +'use strict'; +const { list } = require('postcss'); +const stylehacks = require('stylehacks'); +const insertCloned = require('../insertCloned.js'); +const parseTrbl = require('../parseTrbl.js'); +const hasAllProps = require('../hasAllProps.js'); +const getDecls = require('../getDecls.js'); +const getRules = require('../getRules.js'); +const getValue = require('../getValue.js'); +const mergeRules = require('../mergeRules.js'); +const minifyTrbl = require('../minifyTrbl.js'); +const minifyWsc = require('../minifyWsc.js'); +const canMerge = require('../canMerge.js'); +const trbl = require('../trbl.js'); +const isCustomProp = require('../isCustomProp.js'); +const canExplode = require('../canExplode.js'); +const getLastNode = require('../getLastNode.js'); +const parseWsc = require('../parseWsc.js'); +const { isValidWsc } = require('../validateWsc.js'); + +const wsc = ['width', 'style', 'color']; +const defaults = ['medium', 'none', 'currentcolor']; +const colorMightRequireFallback = + /(hsla|rgba|color|hwb|lab|lch|oklab|oklch)\(/i; + +/** + * @param {...string} parts + * @return {string} + */ +function borderProperty(...parts) { + return `border-${parts.join('-')}`; +} +/** + * @param {string} value + * @return {string} + */ +function mapBorderProperty(value) { + return borderProperty(value); +} + +const directions = trbl.map(mapBorderProperty); +const properties = wsc.map(mapBorderProperty); +/** @type {string[]} */ +const directionalProperties = directions.reduce( + (prev, curr) => prev.concat(wsc.map((prop) => `${curr}-${prop}`)), + /** @type {string[]} */ ([]) +); + +const precedence = [ + ['border'], + directions.concat(properties), + directionalProperties, +]; + +const allProperties = precedence.reduce((a, b) => a.concat(b)); + +/** + * @param {string} prop + * @return {number | undefined} + */ +function getLevel(prop) { + for (let i = 0; i < precedence.length; i++) { + if (precedence[i].includes(prop.toLowerCase())) { + return i; + } + } +} + +/** @type {(value: string) => boolean} */ +const isValueCustomProp = (value) => + value !== undefined && value.search(/var\s*\(\s*--/i) !== -1; + +/** + * @param {string[]} values + * @return {boolean} + */ +function canMergeValues(values) { + return !values.some(isValueCustomProp); +} + +/** + * @param {import('postcss').Declaration} decl + * @return {string} + */ +function getColorValue(decl) { + if (decl.prop.substr(-5) === 'color') { + return decl.value; + } + + return parseWsc(decl.value)[2] || defaults[2]; +} + +/** + * @param {[string, string, string]} values + * @param {[string, string, string]} nextValues + * @return {string[]} + */ +function diffingProps(values, nextValues) { + return wsc.reduce((prev, curr, i) => { + if (values[i] === nextValues[i]) { + return prev; + } + + return [...prev, curr]; + }, /** @type {string[]} */ ([])); +} + +/** + * @param {{values: [string, string, string], nextValues: [string, string, string], decl: import('postcss').Declaration, nextDecl: import('postcss').Declaration, index: number}} arg + * @return {void} + */ +function mergeRedundant({ values, nextValues, decl, nextDecl, index }) { + if (!canMerge([decl, nextDecl])) { + return; + } + + if (stylehacks.detect(decl) || stylehacks.detect(nextDecl)) { + return; + } + + const diff = diffingProps(values, nextValues); + + if (diff.length !== 1) { + return; + } + + const prop = /** @type {string} */ (diff.pop()); + const position = wsc.indexOf(prop); + + const prop1 = `${nextDecl.prop}-${prop}`; + const prop2 = `border-${prop}`; + + let props = parseTrbl(values[position]); + + props[index] = nextValues[position]; + + const borderValue2 = values.filter((e, i) => i !== position).join(' '); + const propValue2 = minifyTrbl(props); + + const origLength = (minifyWsc(decl.value) + nextDecl.prop + nextDecl.value) + .length; + const newLength1 = + decl.value.length + prop1.length + minifyWsc(nextValues[position]).length; + const newLength2 = borderValue2.length + prop2.length + propValue2.length; + + if (newLength1 < newLength2 && newLength1 < origLength) { + nextDecl.prop = prop1; + nextDecl.value = nextValues[position]; + } + + if (newLength2 < newLength1 && newLength2 < origLength) { + decl.value = borderValue2; + nextDecl.prop = prop2; + nextDecl.value = propValue2; + } +} + +/** + * @param {string | string[]} mapped + * @return {boolean} + */ +function isCloseEnough(mapped) { + return ( + (mapped[0] === mapped[1] && mapped[1] === mapped[2]) || + (mapped[1] === mapped[2] && mapped[2] === mapped[3]) || + (mapped[2] === mapped[3] && mapped[3] === mapped[0]) || + (mapped[3] === mapped[0] && mapped[0] === mapped[1]) + ); +} + +/** + * @param {string[]} mapped + * @return {string[]} + */ +function getDistinctShorthands(mapped) { + return [...new Set(mapped)]; +} +/** + * @param {import('postcss').Rule} rule + * @return {void} + */ +function explode(rule) { + rule.walkDecls(/^border/i, (decl) => { + if (!canExplode(decl, false)) { + return; + } + + if (stylehacks.detect(decl)) { + return; + } + + const prop = decl.prop.toLowerCase(); + + // border -> border-trbl + if (prop === 'border') { + if (isValidWsc(parseWsc(decl.value))) { + directions.forEach((direction) => { + insertCloned( + /** @type {import('postcss').Rule} */ (decl.parent), + decl, + { prop: direction } + ); + }); + + decl.remove(); + } + } + + // border-trbl -> border-trbl-wsc + if (directions.some((direction) => prop === direction)) { + let values = parseWsc(decl.value); + + if (isValidWsc(values)) { + wsc.forEach((d, i) => { + insertCloned( + /** @type {import('postcss').Rule} */ (decl.parent), + decl, + { + prop: `${prop}-${d}`, + value: values[i] || defaults[i], + } + ); + }); + + decl.remove(); + } + } + + // border-wsc -> border-trbl-wsc + wsc.some((style) => { + if (prop !== borderProperty(style)) { + return false; + } + + if (isCustomProp(decl)) { + decl.prop = decl.prop.toLowerCase(); + return false; + } + parseTrbl(decl.value).forEach((value, i) => { + insertCloned( + /** @type {import('postcss').Rule} */ (decl.parent), + decl, + { + prop: borderProperty(trbl[i], style), + value, + } + ); + }); + + return decl.remove(); + }); + }); +} + +/** + * @param {import('postcss').Rule} rule + * @return {void} + */ +function merge(rule) { + // border-trbl-wsc -> border-trbl + trbl.forEach((direction) => { + const prop = borderProperty(direction); + + mergeRules( + rule, + wsc.map((style) => borderProperty(direction, style)), + (rules, lastNode) => { + if (canMerge(rules, false) && !rules.some(stylehacks.detect)) { + insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode, + { + prop, + value: rules.map(getValue).join(' '), + } + ); + for (const node of rules) { + node.remove(); + } + + return true; + } + return false; + } + ); + }); + + // border-trbl-wsc -> border-wsc + wsc.forEach((style) => { + const prop = borderProperty(style); + + mergeRules( + rule, + trbl.map((direction) => borderProperty(direction, style)), + (rules, lastNode) => { + if (canMerge(rules) && !rules.some(stylehacks.detect)) { + insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode, + { + prop, + value: minifyTrbl(rules.map(getValue).join(' ')), + } + ); + + for (const node of rules) { + node.remove(); + } + + return true; + } + return false; + } + ); + }); + + // border-trbl -> border-wsc + mergeRules(rule, directions, (rules, lastNode) => { + if (rules.some(stylehacks.detect)) { + return false; + } + + const values = rules.map(({ value }) => value); + + if (!canMergeValues(values)) { + return false; + } + + const parsed = values.map((value) => parseWsc(value)); + + if (!parsed.every(isValidWsc)) { + return false; + } + + wsc.forEach((d, i) => { + const value = parsed.map((v) => v[i] || defaults[i]); + + if (canMergeValues(value)) { + insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode, + { + prop: borderProperty(d), + value: minifyTrbl( + /** @type {[string, string, string, string]} */ (value) + ), + } + ); + } else { + insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode + ); + } + }); + + for (const node of rules) { + node.remove(); + } + + return true; + }); + + // border-wsc -> border + // border-wsc -> border + border-color + // border-wsc -> border + border-dir + mergeRules(rule, properties, (rules, lastNode) => { + if (rules.some(stylehacks.detect)) { + return false; + } + + const values = rules.map((node) => parseTrbl(node.value)); + const mapped = [0, 1, 2, 3].map((i) => + [values[0][i], values[1][i], values[2][i]].join(' ') + ); + + if (!canMergeValues(mapped)) { + return false; + } + + const [width, style, color] = rules; + const reduced = getDistinctShorthands(mapped); + + if (isCloseEnough(mapped) && canMerge(rules, false)) { + const first = + mapped.indexOf(reduced[0]) !== mapped.lastIndexOf(reduced[0]); + + const border = insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode, + { + prop: 'border', + value: first ? reduced[0] : reduced[1], + } + ); + + if (reduced[1]) { + const value = first ? reduced[1] : reduced[0]; + const prop = borderProperty(trbl[mapped.indexOf(value)]); + + rule.insertAfter( + border, + Object.assign(lastNode.clone(), { + prop, + value, + }) + ); + } + for (const node of rules) { + node.remove(); + } + + return true; + } else if (reduced.length === 1) { + rule.insertBefore( + color, + Object.assign(lastNode.clone(), { + prop: 'border', + value: [width, style].map(getValue).join(' '), + }) + ); + rules + .filter((node) => node.prop.toLowerCase() !== properties[2]) + .forEach((node) => node.remove()); + + return true; + } + return false; + }); + + // border-wsc -> border + border-trbl + mergeRules(rule, properties, (rules, lastNode) => { + if (rules.some(stylehacks.detect)) { + return false; + } + + const values = rules.map((node) => parseTrbl(node.value)); + const mapped = [0, 1, 2, 3].map((i) => + [values[0][i], values[1][i], values[2][i]].join(' ') + ); + const reduced = getDistinctShorthands(mapped); + const none = 'medium none currentcolor'; + + if (reduced.length > 1 && reduced.length < 4 && reduced.includes(none)) { + const filtered = mapped.filter((p) => p !== none); + const mostCommon = reduced.sort( + (a, b) => + mapped.filter((v) => v === b).length - + mapped.filter((v) => v === a).length + )[0]; + const borderValue = reduced.length === 2 ? filtered[0] : mostCommon; + + rule.insertBefore( + lastNode, + Object.assign(lastNode.clone(), { + prop: 'border', + value: borderValue, + }) + ); + + directions.forEach((dir, i) => { + if (mapped[i] !== borderValue) { + rule.insertBefore( + lastNode, + Object.assign(lastNode.clone(), { + prop: dir, + value: mapped[i], + }) + ); + } + }); + + for (const node of rules) { + node.remove(); + } + + return true; + } + return false; + }); + + // border-trbl -> border + // border-trbl -> border + border-trbl + mergeRules(rule, directions, (rules, lastNode) => { + if (rules.some(stylehacks.detect)) { + return false; + } + + const values = rules.map((node) => { + const wscValue = parseWsc(node.value); + + if (!isValidWsc(wscValue)) { + return node.value; + } + + return wscValue.map((value, i) => value || defaults[i]).join(' '); + }); + + const reduced = getDistinctShorthands(values); + + if (isCloseEnough(values)) { + const first = + values.indexOf(reduced[0]) !== values.lastIndexOf(reduced[0]); + + rule.insertBefore( + lastNode, + Object.assign(lastNode.clone(), { + prop: 'border', + value: minifyWsc(first ? values[0] : values[1]), + }) + ); + + if (reduced[1]) { + const value = first ? reduced[1] : reduced[0]; + const prop = directions[values.indexOf(value)]; + rule.insertBefore( + lastNode, + Object.assign(lastNode.clone(), { + prop: prop, + value: minifyWsc(value), + }) + ); + } + + for (const node of rules) { + node.remove(); + } + + return true; + } + return false; + }); + + // border-trbl-wsc + border-trbl (custom prop) -> border-trbl + border-trbl-wsc (custom prop) + directions.forEach((direction) => { + wsc.forEach((style, i) => { + const prop = `${direction}-${style}`; + + mergeRules(rule, [direction, prop], (rules, lastNode) => { + if (lastNode.prop !== direction) { + return false; + } + + const values = parseWsc(lastNode.value); + + if (!isValidWsc(values)) { + return false; + } + + const wscProp = rules.filter((r) => r !== lastNode)[0]; + + if (!isValueCustomProp(values[i]) || isCustomProp(wscProp)) { + return false; + } + + const wscValue = values[i]; + + values[i] = wscProp.value; + + if (canMerge(rules, false) && !rules.some(stylehacks.detect)) { + insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode, + { + prop, + value: wscValue, + } + ); + lastNode.value = minifyWsc(/** @type {any} */ (values)); + + wscProp.remove(); + + return true; + } + return false; + }); + }); + }); + + // border-wsc + border (custom prop) -> border + border-wsc (custom prop) + wsc.forEach((style, i) => { + const prop = borderProperty(style); + mergeRules(rule, ['border', prop], (rules, lastNode) => { + if (lastNode.prop !== 'border') { + return false; + } + + const values = parseWsc(lastNode.value); + + if (!isValidWsc(values)) { + return false; + } + + const wscProp = rules.filter((r) => r !== lastNode)[0]; + + if (!isValueCustomProp(values[i]) || isCustomProp(wscProp)) { + return false; + } + + const wscValue = values[i]; + + values[i] = wscProp.value; + + if (canMerge(rules, false) && !rules.some(stylehacks.detect)) { + insertCloned( + /** @type {import('postcss').Rule} */ (lastNode.parent), + lastNode, + { + prop, + value: wscValue, + } + ); + lastNode.value = minifyWsc(/** @type {any} */ (values)); + wscProp.remove(); + + return true; + } + return false; + }); + }); + + // optimize border-trbl + let decls = getDecls(rule, directions); + + while (decls.length) { + const lastNode = decls[decls.length - 1]; + + wsc.forEach((d, i) => { + const names = directions + .filter((name) => name !== lastNode.prop) + .map((name) => `${name}-${d}`); + + let nodes = rule.nodes.slice(0, rule.nodes.indexOf(lastNode)); + + const border = getLastNode(nodes, 'border'); + + if (border) { + nodes = nodes.slice(nodes.indexOf(border)); + } + + const props = nodes.filter( + (node) => + node.type === 'decl' && + names.includes(node.prop) && + node.important === lastNode.important + ); + const rules = getRules( + /** @type {import('postcss').Declaration[]} */ (props), + names + ); + + if (hasAllProps(rules, ...names) && !rules.some(stylehacks.detect)) { + const values = rules.map((node) => (node ? node.value : null)); + const filteredValues = values.filter(Boolean); + const lastNodeValue = list.space(lastNode.value)[i]; + + values[directions.indexOf(lastNode.prop)] = lastNodeValue; + + let value = minifyTrbl(values.join(' ')); + + if ( + filteredValues[0] === filteredValues[1] && + filteredValues[1] === filteredValues[2] + ) { + value = /** @type {string} */ (filteredValues[0]); + } + + let refNode = props[props.length - 1]; + + if (value === lastNodeValue) { + refNode = lastNode; + let valueArray = list.space(lastNode.value); + valueArray.splice(i, 1); + lastNode.value = valueArray.join(' '); + } + + insertCloned( + /** @type {import('postcss').Rule} */ (refNode.parent), + /** @type {import('postcss').Declaration} */ (refNode), + { + prop: borderProperty(d), + value, + } + ); + + decls = decls.filter((node) => !rules.includes(node)); + for (const node of rules) { + node.remove(); + } + } + }); + + decls = decls.filter((node) => node !== lastNode); + } + + rule.walkDecls('border', (decl) => { + const nextDecl = decl.next(); + + if (!nextDecl || nextDecl.type !== 'decl') { + return false; + } + + const index = directions.indexOf(nextDecl.prop); + + if (index === -1) { + return; + } + + const values = parseWsc(decl.value); + const nextValues = parseWsc(nextDecl.value); + + if (!isValidWsc(values) || !isValidWsc(nextValues)) { + return; + } + + const config = { + values, + nextValues, + decl, + nextDecl, + index, + }; + + return mergeRedundant(config); + }); + + rule.walkDecls(/^border($|-(top|right|bottom|left)$)/i, (decl) => { + let values = parseWsc(decl.value); + + if (!isValidWsc(values)) { + return; + } + + const position = directions.indexOf(decl.prop); + let dirs = [...directions]; + + dirs.splice(position, 1); + wsc.forEach((d, i) => { + const props = dirs.map((dir) => `${dir}-${d}`); + + mergeRules(rule, [decl.prop, ...props], (rules) => { + if (!rules.includes(decl)) { + return false; + } + + const longhands = rules.filter((p) => p !== decl); + + if ( + longhands[0].value.toLowerCase() === + longhands[1].value.toLowerCase() && + longhands[1].value.toLowerCase() === + longhands[2].value.toLowerCase() && + values[i] !== undefined && + longhands[0].value.toLowerCase() === values[i].toLowerCase() + ) { + for (const node of longhands) { + node.remove(); + } + + insertCloned( + /** @type {import('postcss').Rule} */ (decl.parent), + decl, + { + prop: borderProperty(d), + value: values[i], + } + ); + + /** @type {string|null} */ (values[i]) = null; + } + return false; + }); + + const newValue = values.join(' '); + + if (newValue) { + decl.value = newValue; + } else { + decl.remove(); + } + }); + }); + + // clean-up values + rule.walkDecls(/^border($|-(top|right|bottom|left)$)/i, (decl) => { + decl.value = minifyWsc(decl.value); + }); + + // border-spacing-hv -> border-spacing + rule.walkDecls(/^border-spacing$/i, (decl) => { + const value = list.space(decl.value); + + // merge vertical and horizontal dups + if (value.length > 1 && value[0] === value[1]) { + decl.value = value.slice(1).join(' '); + } + }); + + // clean-up rules + decls = getDecls(rule, allProperties); + + while (decls.length) { + const lastNode = decls[decls.length - 1]; + const lastPart = lastNode.prop.split('-').pop(); + + // remove properties of lower precedence + const lesser = decls.filter( + (node) => + !stylehacks.detect(lastNode) && + !stylehacks.detect(node) && + !isCustomProp(lastNode) && + node !== lastNode && + node.important === lastNode.important && + /** @type {number} */ (getLevel(node.prop)) > + /** @type {number} */ (getLevel(lastNode.prop)) && + (node.prop.toLowerCase().includes(lastNode.prop) || + node.prop.toLowerCase().endsWith(/** @type {string} */ (lastPart))) + ); + + for (const node of lesser) { + node.remove(); + } + decls = decls.filter((node) => !lesser.includes(node)); + + // get duplicate properties + let duplicates = decls.filter( + (node) => + !stylehacks.detect(lastNode) && + !stylehacks.detect(node) && + node !== lastNode && + node.important === lastNode.important && + node.prop === lastNode.prop && + !(!isCustomProp(node) && isCustomProp(lastNode)) + ); + + if (duplicates.length) { + if (colorMightRequireFallback.test(getColorValue(lastNode))) { + const preserve = duplicates + .filter( + (node) => !colorMightRequireFallback.test(getColorValue(node)) + ) + .pop(); + + duplicates = duplicates.filter((node) => node !== preserve); + } + for (const node of duplicates) { + node.remove(); + } + } + + decls = decls.filter( + (node) => node !== lastNode && !duplicates.includes(node) + ); + } +} + +module.exports = { + explode, + merge, +}; |