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packages/wepy-cli/core/plugins/template/parseClassAndStyle.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| const exprParser = require('../../util/exprParser'); | ||
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| exports = module.exports = function () { | ||
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| this.register('template-parse-ast-attr-:class', function parseBindClass ({item, name, expr}) { | ||
| let exprObj = exprParser.str2obj(expr); | ||
| item.bindClass = Object.keys(exprObj).map(name => { | ||
| let exp = exprObj[name].replace(/\'/ig, '\\\'').replace(/\"/ig, '\\"'); | ||
| name = name.replace(/\'/ig, '\\\'').replace(/\"/ig, '\\"'); | ||
| return `${exp} ? '${name}' : ''`; | ||
| }); | ||
| // return {} means remove :class | ||
| return {}; | ||
| }); | ||
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| this.register('template-parse-ast-attr-:style', function parseBindClass ({item, name, expr}) { | ||
| let exprObj = exprParser.str2obj(expr); | ||
| item.bindStyle = Object.keys(exprObj).map(name => { | ||
| let exp = exprObj[name].replace(/\'/ig, '\\\'').replace(/\"/ig, '\\"'); | ||
| name = name.replace(/\'/ig, '\\\'').replace(/\"/ig, '\\"'); | ||
| name = exprParser.hyphenate(name); | ||
| return `'${name}:' + ${exp} + ';'`; | ||
| }); | ||
| // return {} means remove :class | ||
| return {}; | ||
| }); | ||
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| }; | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,92 @@ | ||
| const camelizeRE = /-(\w)/g; | ||
| const hyphenateRE = /([^-])([A-Z])/g; | ||
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| const cached = (fn) => { | ||
| let cache = {}; | ||
| return ((str) => (cache[str] || (cache[str] = fn(str)))); | ||
| }; | ||
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| exports = module.exports = { | ||
| hyphenate: cached((str) => { | ||
| return str | ||
| .replace(hyphenateRE, '$1-$2') | ||
| .replace(hyphenateRE, '$1-$2') | ||
| .toLowerCase(); | ||
| }), | ||
| camelize: cached((str) => { | ||
| return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; }); | ||
| }), | ||
| /** | ||
| * str2obj parse a object string to a real object | ||
| * @param {String} str "{someKey: someCondition}" | ||
| * @return {Object} {someKey: someCondition} | ||
| */ | ||
| str2obj: cached((exp) => { | ||
| exp = exp.replace(/^\s/ig, '').replace(/\s$/ig, ''); | ||
| if (exp[0] === '{' && exp[exp.length - 1] === '}') { | ||
| exp = exp.substring(1, exp.length - 1); | ||
| let i = 0, len = exp.length; | ||
| let flagStack = [], flag = 'start'; | ||
| let classNames = [], result = {}, str = ''; | ||
| for (i = 0; i < len; i++) { | ||
| if ((exp[i] === '\'' || exp[i] === '"')) { | ||
| if (flagStack.length && flagStack[0] === exp[i]) { | ||
| flagStack.pop(); | ||
| if (flag === 'class') { | ||
| flag = ':'; | ||
| continue; | ||
| } else if (flag === 'expression') { | ||
| str += exp[i]; | ||
| continue; | ||
| } | ||
| } else { | ||
| if (flagStack.length === 0) { | ||
| flagStack.push(exp[i]); | ||
| if (flag === 'start') { | ||
| flag = 'class'; | ||
| continue; | ||
| } else if (flag === 'expression') { | ||
| str += exp[i]; | ||
| continue; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| // {abc: num < 1} or {'abc': num <１} | ||
| if (exp[i] === ':' && (flag === ':' || flag === 'class') && flagStack.length === 0) { | ||
| flag = 'expression'; | ||
| classNames.push(str); | ||
| str = ''; | ||
| continue; | ||
| } | ||
| if (exp[i] === ',' && flag === 'expression' && flagStack.length === 0) { | ||
| result[classNames[classNames.length - 1]] = str.replace(/^\s/ig, '').replace(/\s$/ig, '');; | ||
| str = ''; | ||
| flag = 'start'; | ||
| continue; | ||
| } | ||
| // get rid of the begining space | ||
| if (!str.length && exp[i] === ' ') | ||
| continue; | ||
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| // not started with '', like {abc: num < 1} | ||
| if (flag === 'start') { | ||
| flag = 'class'; | ||
| } | ||
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| if (flag === 'class' || flag === 'expression') { | ||
| str += exp[i]; | ||
| } | ||
| } | ||
| if (str.length) { | ||
| result[classNames[classNames.length - 1]] = str.replace(/^\s/ig, '').replace(/\s$/ig, ''); | ||
| } | ||
| return result; | ||
| } else { | ||
| throw ':class expression is not correct, it has to be {\'className\': mycondition}'; | ||
| } | ||
| }) | ||
| } | ||
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