| 5 | const valueNs = `extendCurrValue${Date.now()}` |
| 6 | |
| 7 | function mergeExtend(style, rule, sheet, newStyle) { |
| 8 | const extendType = typeof style.extend |
| 9 | // Extend using a rule name. |
| 10 | if (extendType === 'string') { |
| 11 | if (!sheet) return |
| 12 | const refRule = sheet.getRule(style.extend) |
| 13 | if (!refRule) return |
| 14 | if (refRule === rule) { |
| 15 | warning(false, `[JSS] A rule tries to extend itself \n${rule.toString()}`) |
| 16 | return |
| 17 | } |
| 18 | const {parent} = refRule.options |
| 19 | if (parent) { |
| 20 | const originalStyle = parent.rules.raw[style.extend] |
| 21 | extend(originalStyle, rule, sheet, newStyle) |
| 22 | } |
| 23 | return |
| 24 | } |
| 25 | |
| 26 | // Extend using an array. |
| 27 | if (Array.isArray(style.extend)) { |
| 28 | for (let index = 0; index < style.extend.length; index++) { |
| 29 | const singleExtend = style.extend[index] |
| 30 | const singleStyle = |
| 31 | typeof singleExtend === 'string' ? {...style, extend: singleExtend} : style.extend[index] |
| 32 | extend(singleStyle, rule, sheet, newStyle) |
| 33 | } |
| 34 | return |
| 35 | } |
| 36 | |
| 37 | // Extend is a style object. |
| 38 | for (const prop in style.extend) { |
| 39 | if (prop === 'extend') { |
| 40 | extend(style.extend.extend, rule, sheet, newStyle) |
| 41 | continue |
| 42 | } |
| 43 | if (isObject(style.extend[prop])) { |
| 44 | if (!(prop in newStyle)) newStyle[prop] = {} |
| 45 | extend(style.extend[prop], rule, sheet, newStyle[prop]) |
| 46 | continue |
| 47 | } |
| 48 | newStyle[prop] = style.extend[prop] |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | function mergeRest(style, rule, sheet, newStyle) { |
| 53 | // Copy base style. |