vusion-api
Version:
Vusion Node.js API
92 lines • 3.32 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const postcss = __importStar(require("postcss"));
const shared_1 = require("../utils/shared");
/**
* 样式 AST 处理器
* 该 class 可以在两端(node, browser)运行
*/
class StyleHandler {
constructor(code = '', options) {
this.dirty = false;
this.code = code;
this.ast = this.parse(code);
}
parse(code) {
return postcss.parse(code);
}
generate() {
return this.ast.toString();
}
/**
* 将另一个 that 的样式合并到当前样式中
* @TODO 目前对另一个 that 的样式 ast 有修改
* @param that 另一个 StyleHandler
* @param index 插入到的位置
*/
merge(that, index) {
const firstNode = that.ast.nodes[0];
if (firstNode)
firstNode.raws.before = '\n\n';
if (index === undefined)
index = this.ast.nodes.length;
const thisClasses = new Map();
this.ast.walkRules((rule) => {
const re = /\.[-_a-zA-Z0-9]+/g;
let cap;
while (cap = re.exec(rule.selector)) {
thisClasses.set(cap[0], true);
}
});
const classMap = {};
that.ast.walkRules((rule) => {
const re = /\.[-_a-zA-Z0-9]+/g;
let cap;
while (cap = re.exec(rule.selector)) {
let cls = (0, shared_1.uniqueInMap)(cap[0], thisClasses);
if (cls !== cap[0]) {
classMap[cap[0].slice(1)] = cls.slice(1);
rule.selector = rule.selector.slice(0, cap.index) + cls + rule.selector.slice(cap.index + cap[0].length);
}
}
});
this.ast.nodes.splice(index, 0, ...that.ast.nodes);
return { class: classMap };
}
/**
* 将另一个 that 的样式追加到当前样式后
* @TODO 目前对另一个 that 的样式 ast 有修改
* @param that 另一个 StyleHandler
*/
append(that) {
const firstNode = that.ast.nodes[0];
if (firstNode)
firstNode.raws.before = '\n\n';
this.ast.nodes.push(...that.ast.nodes);
}
}
exports.default = StyleHandler;
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