daoji_h5/components/jyf-Parser/libs/CssHandler.js

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/*
解析和匹配 Css 的选择器
github地址https://github.com/jin-yufeng/Parser
文档地址https://jin-yufeng.github.io/Parser
authorJinYufeng
*/
const userAgentStyles = require("./config.js").userAgentStyles;
class CssHandler {
constructor(tagStyle = {}) {
this.styles = Object.assign({}, tagStyle);
};
getStyle(data) {
var style = '';
data = data.replace(/<[sS][tT][yY][lL][eE][\s\S]*?>([\s\S]*?)<\/[sS][tT][yY][lL][eE][\s\S]*?>/g, function() {
style += arguments[1];
return '';
})
this.styles = new CssParser(style, this.styles).parse();
return data;
};
parseCss(css) {
return new CssParser(css, {}, true).parse();
};
match(name, attrs) {
var tmp, matched = ((tmp = this.styles[name]) ? (tmp + ';') : '');
if (attrs.class) {
var classes = attrs.class.split(' ');
for (var i = 0; i < classes.length; i++)
if (tmp = this.styles['.' + classes[i]])
matched += (tmp + ';');
}
if (tmp = this.styles['#' + attrs.id])
matched += tmp;
return matched;
};
}
module.exports = CssHandler;
function isBlankChar(c) {
return c == ' ' || c == '\u00A0' || c == '\t' || c == '\r' || c == '\n' || c == '\f';
};
class CssParser {
constructor(data, tagStyle, api) {
this.data = data;
this.res = tagStyle;
if (!api)
for (var item in userAgentStyles) {
if (tagStyle[item]) tagStyle[item] = userAgentStyles[item] + ';' + tagStyle[item];
else tagStyle[item] = userAgentStyles[item];
}
this._floor = 0;
this._i = 0;
this._list = [];
this._comma = false;
this._sectionStart = 0;
this._state = this.Space;
};
parse() {
for (; this._i < this.data.length; this._i++)
this._state(this.data[this._i]);
return this.res;
};
// 状态机
Space(c) {
if (c == '.' || c == '#' || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
this._sectionStart = this._i;
this._state = this.StyleName;
} else if (c == '/' && this.data[this._i + 1] == '*')
this.Comment();
else if (!isBlankChar(c) && c != ';')
this._state = this.Ignore;
};
Comment() {
this._i = this.data.indexOf("*/", this._i);
if (this._i == -1) this._i = this.data.length;
this._i++;
this._state = this.Space;
};
Ignore(c) {
if (c == '{') this._floor++;
else if (c == '}' && --this._floor <= 0) {
this._list = [];
this._state = this.Space;
}
};
StyleName(c) {
if (isBlankChar(c)) {
this._list.push(this.data.substring(this._sectionStart, this._i));
this._state = this.NameSpace;
} else if (c == '{') {
this._list.push(this.data.substring(this._sectionStart, this._i));
this._floor = 1;
this._sectionStart = this._i + 1;
this.Content();
} else if (c == ',') {
this._list.push(this.data.substring(this._sectionStart, this._i));
this._sectionStart = this._i + 1;
this._comma = true;
} else if (!(c >= 'a' && c <= 'z') && !(c >= 'A' && c <= 'Z') && !(c >= '0' && c <= '9') && c != '.' && c != '#' &&
c != '-' && c != '_')
this._state = this.Ignore;
};
NameSpace(c) {
if (c == '{') {
this._floor = 1;
this._sectionStart = this._i + 1;
this.Content();
} else if (c == ',') {
this._comma = true;
this._sectionStart = this._i + 1;
this._state = this.StyleName;
} else if (!isBlankChar(c)) {
if (this._comma) {
this._state = this.StyleName;
this._sectionStart = this._i;
this._i--;
this._comma = false;
} else this._state = this.Ignore;
}
};
Content() {
this._i = this.data.indexOf('}', this._i);
if (this._i == -1) this._i = this.data.length;
// 去除空白符
var flag = false,
pos, content = this.data.substring(this._sectionStart, this._i);
for (var i = 0; i < content.length; i++) {
if (isBlankChar(content[i])) {
if (!flag) {
pos = i;
flag = true;
}
} else {
if (flag) {
if (pos == 0) content = content.substring(i);
else if (i - pos > 1) content = content.substring(0, pos) + (content[pos - 1] == ';' ? (pos--, '') : ' ') +
content.substring(i);
i = pos;
flag = false;
}
}
}
if (flag) content = content.substring(0, pos);
for (var i = 0; i < this._list.length; i++)
this.res[this._list[i]] = (this.res[this._list[i]] || '') + content;
this._list = [];
this._state = this.Space;
}
}