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101 lines
2.8 KiB
101 lines
2.8 KiB
3 years ago
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const cfg = require('./config.js'),
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isLetter = c => (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
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function CssHandler(tagStyle) {
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var styles = Object.assign(Object.create(null), cfg.userAgentStyles);
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for (var item in tagStyle)
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styles[item] = (styles[item] ? styles[item] + ';' : '') + tagStyle[item];
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this.styles = styles;
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}
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CssHandler.prototype.getStyle = function(data) {
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this.styles = new parser(data, this.styles).parse();
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}
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CssHandler.prototype.match = function(name, attrs) {
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var tmp, matched = (tmp = this.styles[name]) ? tmp + ';' : '';
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if (attrs.class) {
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var items = attrs.class.split(' ');
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for (var i = 0, item; item = items[i]; i++)
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if (tmp = this.styles['.' + item])
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matched += tmp + ';';
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}
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if (tmp = this.styles['#' + attrs.id])
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matched += tmp + ';';
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return matched;
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}
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module.exports = CssHandler;
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function parser(data, init) {
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this.data = data;
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this.floor = 0;
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this.i = 0;
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this.list = [];
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this.res = init;
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this.state = this.Space;
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}
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parser.prototype.parse = function() {
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for (var c; c = this.data[this.i]; this.i++)
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this.state(c);
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return this.res;
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}
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parser.prototype.section = function() {
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return this.data.substring(this.start, this.i);
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}
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// 状态机
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parser.prototype.Space = function(c) {
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if (c == '.' || c == '#' || isLetter(c)) {
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this.start = this.i;
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this.state = this.Name;
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} else if (c == '/' && this.data[this.i + 1] == '*')
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this.Comment();
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else if (!cfg.blankChar[c] && c != ';')
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this.state = this.Ignore;
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}
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parser.prototype.Comment = function() {
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this.i = this.data.indexOf('*/', this.i) + 1;
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if (!this.i) this.i = this.data.length;
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this.state = this.Space;
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}
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parser.prototype.Ignore = function(c) {
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if (c == '{') this.floor++;
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else if (c == '}' && !--this.floor) {
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this.list = [];
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this.state = this.Space;
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}
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}
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parser.prototype.Name = function(c) {
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if (cfg.blankChar[c]) {
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this.list.push(this.section());
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this.state = this.NameSpace;
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} else if (c == '{') {
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this.list.push(this.section());
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this.Content();
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} else if (c == ',') {
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this.list.push(this.section());
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this.Comma();
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} else if (!isLetter(c) && (c < '0' || c > '9') && c != '-' && c != '_')
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this.state = this.Ignore;
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}
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parser.prototype.NameSpace = function(c) {
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if (c == '{') this.Content();
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else if (c == ',') this.Comma();
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else if (!cfg.blankChar[c]) this.state = this.Ignore;
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}
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parser.prototype.Comma = function() {
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while (cfg.blankChar[this.data[++this.i]]);
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if (this.data[this.i] == '{') this.Content();
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else {
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this.start = this.i--;
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this.state = this.Name;
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}
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}
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parser.prototype.Content = function() {
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this.start = ++this.i;
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if ((this.i = this.data.indexOf('}', this.i)) == -1) this.i = this.data.length;
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var content = this.section();
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for (var i = 0, item; item = this.list[i++];)
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if (this.res[item]) this.res[item] += ';' + content;
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else this.res[item] = content;
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this.list = [];
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this.state = this.Space;
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}
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