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112 lines
3.7 KiB
JavaScript
112 lines
3.7 KiB
JavaScript
// 设置自定义颜色
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function setColorWithTemplate(template) {
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return function (color) {
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let custom_theme = JSON.parse(JSON.stringify(template));
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custom_theme.block.h1['border-bottom'] = `2px solid ${color}`;
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custom_theme.block.h2['background'] = color;
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custom_theme.block.h3['border-left'] = `3px solid ${color}`;
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custom_theme.block.h4['color'] = color;
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custom_theme.inline.strong['color'] = color;
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return custom_theme;
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};
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}
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let setColor = setColorWithTemplate(default_theme);
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function customCssWithTemplate(template, color) {
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return function (jsonString) {
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let custom_theme = JSON.parse(JSON.stringify(template));
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custom_theme.block.h1 = jsonString.h1;
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custom_theme.block.h2 = jsonString.h2;
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custom_theme.block.h3 = jsonString.h3;
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custom_theme.block.h4 = jsonString.h4;
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custom_theme.block.p = jsonString.p;
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// color
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custom_theme.block.h1['border-bottom'] = `2px solid ${color}`;
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custom_theme.block.h2['background'] = color;
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custom_theme.block.h3['border-left'] = `3px solid ${color}`;
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custom_theme.block.h4['color'] = color;
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custom_theme.inline.strong['color'] = color;
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return custom_theme;
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};
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}
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let customCss = customCssWithTemplate(default_theme);
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/**
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* 将CSS形式的字符串转换为JSON
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*
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* @param {css字符串} css
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*/
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function css2json(css) {
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// 移除CSS所有注释
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while ((open = css.indexOf("/*")) !== -1 &&
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(close = css.indexOf("*/")) !== -1) {
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css = css.substring(0, open) + css.substring(close + 2);
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}
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// 初始化返回值
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let json = {};
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while (css.length > 0) {
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// 存储第一个左/右花括号的下标
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const lbracket = css.indexOf('{');
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const rbracket = css.indexOf('}');
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// 第一步：将声明转换为Object，如：
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// `font: 'Times New Roman' 1em; color: #ff0000; margin-top: 1em;`
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// ==>
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// `{"font": "'Times New Roman' 1em", "color": "#ff0000", "margin-top": "1em"}`
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// 辅助方法：将array转为object
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function toObject(array) {
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let ret = {};
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array.forEach(e => {
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const index = e.indexOf(':');
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const property = e.substring(0, index).trim();
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const value = e.substring(index + 1).trim();
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ret[property] = value;
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});
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return ret;
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}
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// 切割声明块并移除空白符，然后放入数组中
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let declarations = css.substring(lbracket + 1, rbracket)
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.split(";")
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.map(e => e.trim())
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.filter(e => e.length > 0); // 移除所有""空值
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// 转为Object对象
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declarations = toObject(declarations);
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// 第二步：选择器处理，每个选择器会与它对应的声明相关联，如：
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// `h1, p#bar {color: red}`
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// ==>
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// {"h1": {color: red}, "p#bar": {color: red}}
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let selectors = css.substring(0, lbracket)
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// 以,切割，并移除空格：`"h1, p#bar, span.foo"` => ["h1", "p#bar", "span.foo"]
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.split(",")
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.map(selector => selector.trim());
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// 迭代赋值
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selectors.forEach(selector => {
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// 若不存在，则先初始化
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if (!json[selector]) json[selector] = {};
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// 赋值到JSON
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Object.keys(declarations).forEach(key => {
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json[selector][key] = declarations[key];
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});
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});
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// 继续下个声明块
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css = css.slice(rbracket + 1).trim();
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}
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// 返回JSON形式的结果串
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return json;
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} |