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137 lines
3.0 KiB
137 lines
3.0 KiB
// 定义模板引擎的语法
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defaults.openTag = '{{';
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defaults.closeTag = '}}';
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var filtered = function (js, filter) {
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var parts = filter.split(':');
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var name = parts.shift();
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var args = parts.join(':') || '';
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if (args) {
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args = ', ' + args;
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}
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return '$helpers.' + name + '(' + js + args + ')';
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}
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defaults.parser = function (code, options) {
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// var match = code.match(/([\w\$]*)(\b.*)/);
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// var key = match[1];
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// var args = match[2];
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// var split = args.split(' ');
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// split.shift();
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code = code.replace(/^\s/, '');
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var split = code.split(' ');
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var key = split.shift();
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var args = split.join(' ');
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switch (key) {
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case 'if':
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code = 'if(' + args + '){';
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break;
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case 'else':
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if (split.shift() === 'if') {
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split = ' if(' + split.join(' ') + ')';
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} else {
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split = '';
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}
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code = '}else' + split + '{';
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break;
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case '/if':
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code = '}';
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break;
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case 'each':
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var object = split[0] || '$data';
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var as = split[1] || 'as';
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var value = split[2] || '$value';
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var index = split[3] || '$index';
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var param = value + ',' + index;
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if (as !== 'as') {
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object = '[]';
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}
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code = '$each(' + object + ',function(' + param + '){';
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break;
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case '/each':
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code = '});';
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break;
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case 'echo':
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code = 'print(' + args + ');';
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break;
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case 'print':
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case 'include':
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code = key + '(' + split.join(',') + ');';
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break;
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default:
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// 过滤器（辅助方法）
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// {{value | filterA:'abcd' | filterB}}
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// >>> $helpers.filterB($helpers.filterA(value, 'abcd'))
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// TODO: {{ddd||aaa}} 不包含空格
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if (/^\s*\|\s*[\w\$]/.test(args)) {
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var escape = true;
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// {{#value | link}}
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if (code.indexOf('#') === 0) {
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code = code.substr(1);
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escape = false;
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}
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var i = 0;
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var array = code.split('|');
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var len = array.length;
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var val = array[i++];
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for (; i < len; i ++) {
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val = filtered(val, array[i]);
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}
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code = (escape ? '=' : '=#') + val;
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// 即将弃用 {{helperName value}}
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} else if (template.helpers[key]) {
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code = '=#' + key + '(' + split.join(',') + ');';
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// 内容直接输出 {{value}}
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} else {
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code = '=' + code;
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}
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break;
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}
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return code;
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};
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