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379 lines
11 KiB
JavaScript
379 lines
11 KiB
JavaScript
import defaultTheme from "./themes/default-theme";
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import prettier from "prettier/standalone";
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import prettierMarkdown from "prettier/parser-markdown";
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import prettierCss from "prettier/parser-postcss";
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// 设置自定义颜色
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export function setColorWithTemplate(template) {
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return function (color) {
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let customTheme = JSON.parse(JSON.stringify(template));
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customTheme.block.h1["border-bottom"] = `2px solid ${color}`;
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customTheme.block.h2["background"] = color;
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customTheme.block.h3["border-left"] = `3px solid ${color}`;
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customTheme.block.h4["color"] = color;
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customTheme.inline.strong["color"] = color;
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return customTheme;
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};
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}
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export const setColorWithCustomTemplate = function setColorWithCustomTemplate(
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template,
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color
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) {
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let customTheme = JSON.parse(JSON.stringify(template));
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customTheme.block.h1["border-bottom"] = `2px solid ${color}`;
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customTheme.block.h2["background"] = color;
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customTheme.block.h3["border-left"] = `3px solid ${color}`;
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customTheme.block.h4["color"] = color;
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customTheme.inline.strong["color"] = color;
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return customTheme;
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};
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// 设置自定义字体大小
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export function setFontSizeWithTemplate(template) {
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return function (fontSize) {
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let customTheme = JSON.parse(JSON.stringify(template));
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customTheme.block.h1["font-size"] = `${fontSize * 1.14}px`;
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customTheme.block.h2["font-size"] = `${fontSize * 1.1}px`;
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customTheme.block.h3["font-size"] = `${fontSize}px`;
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customTheme.block.h4["font-size"] = `${fontSize}px`;
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return customTheme;
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};
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}
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export const setColor = setColorWithTemplate(defaultTheme);
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export const setFontSize = setFontSizeWithTemplate(defaultTheme);
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export function customCssWithTemplate(jsonString, color, theme) {
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let customTheme = JSON.parse(JSON.stringify(theme));
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// block
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customTheme.block.h1["border-bottom"] = `2px solid ${color}`;
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customTheme.block.h2["background"] = color;
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customTheme.block.h3["border-left"] = `3px solid ${color}`;
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customTheme.block.h4["color"] = color;
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customTheme.inline.strong["color"] = color;
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customTheme.block.h1 = Object.assign(customTheme.block.h1, jsonString.h1);
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customTheme.block.h2 = Object.assign(customTheme.block.h2, jsonString.h2);
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customTheme.block.h3 = Object.assign(customTheme.block.h3, jsonString.h3);
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customTheme.block.h4 = Object.assign(customTheme.block.h4, jsonString.h4);
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customTheme.block.p = Object.assign(customTheme.block.p, jsonString.p);
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customTheme.block.hr = Object.assign(customTheme.block.hr, jsonString.hr);
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customTheme.block.blockquote = Object.assign(
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customTheme.block.blockquote,
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jsonString.blockquote
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);
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customTheme.block.blockquote_p = Object.assign(
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customTheme.block.blockquote_p,
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jsonString.blockquote_p
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);
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customTheme.block.image = Object.assign(
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customTheme.block.image,
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jsonString.image
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);
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// inline
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customTheme.inline.strong = Object.assign(
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customTheme.inline.strong,
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jsonString.strong
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);
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customTheme.inline.codespan = Object.assign(
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customTheme.inline.codespan,
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jsonString.codespan
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);
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customTheme.inline.link = Object.assign(
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customTheme.inline.link,
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jsonString.link
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);
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customTheme.inline.wx_link = Object.assign(
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customTheme.inline.wx_link,
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jsonString.wx_link
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);
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customTheme.block.ul = Object.assign(customTheme.block.ul, jsonString.ul);
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customTheme.block.ol = Object.assign(customTheme.block.ol, jsonString.ol);
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customTheme.inline.listitem = Object.assign(
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customTheme.inline.listitem,
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jsonString.li
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);
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return customTheme;
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}
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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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export function css2json(css) {
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// 移除CSS所有注释
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let open, close;
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while (
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(open = css.indexOf("/*")) !== -1 &&
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(close = css.indexOf("*/")) !== -1
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) {
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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 && css.indexOf("{") !== -1 && css.indexOf("}") !== -1) {
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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
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.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
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.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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}
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/**
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* 将编辑器内容保存到 LocalStorage
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* @param {*} editor
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* @param {*} name
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*/
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export function saveEditorContent(editor, name) {
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const content = editor.getValue(0);
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if (content) {
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localStorage.setItem(name, content);
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} else {
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localStorage.removeItem(name);
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}
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}
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/**
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* 格式化文档
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* @param {文档内容} content
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*/
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export function formatDoc(content) {
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const doc = prettier.format(content, {
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parser: "markdown",
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plugins: [prettierMarkdown],
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});
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return doc;
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}
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/**
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* 格式化css
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* @param {css内容}} content
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*/
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export function formatCss(content) {
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const doc = prettier.format(content, {
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parser: "css",
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plugins: [prettierCss],
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});
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return doc;
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}
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/**
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* 导出原始 Markdown 文档
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* @param {文档内容} doc
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*/
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export function downloadMD(doc) {
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let downLink = document.createElement("a");
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downLink.download = "content.md";
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downLink.style.display = "none";
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let blob = new Blob([doc]);
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downLink.href = URL.createObjectURL(blob);
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document.body.appendChild(downLink);
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downLink.click();
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document.body.removeChild(downLink);
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}
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/**
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* 导出 HTML 生成内容
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*/
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export function exportHTML() {
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const element = document.querySelector("#output");
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setStyles(element);
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const htmlStr = element.innerHTML;
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const downLink = document.createElement("a");
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downLink.download = "content.html";
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downLink.style.display = "none";
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let blob = new Blob([
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`<html><head><meta charset="utf-8" /></head><body><div style="width: 750px; margin: auto;">${htmlStr}</div></body></html>`,
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]);
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downLink.href = URL.createObjectURL(blob);
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document.body.appendChild(downLink);
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downLink.click();
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document.body.removeChild(downLink);
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function setStyles(element) {
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switch (true) {
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case isPre(element):
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case isCode(element):
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case isSpan(element):
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element.setAttribute("style", getElementStyles(element));
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default:
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}
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if (element.children.length) {
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Array.from(element.children).forEach((child) => setStyles(child));
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}
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// 判断是否是包裹代码块的 pre 元素
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function isPre(element) {
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return (
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element.tagName === "PRE" &&
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Array.from(element.classList).includes("code__pre")
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);
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}
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// 判断是否是包裹代码块的 code 元素
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function isCode(element) {
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return (
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element.tagName === "CODE" &&
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Array.from(element.classList).includes("prettyprint")
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);
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}
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// 判断是否是包裹代码字符的 span 元素
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function isSpan(element) {
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return (
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element.tagName === "SPAN" &&
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(isCode(element.parentElement) ||
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isCode(element.parentElement.parentElement))
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);
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}
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}
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}
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/**
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* 生成列表字符串
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* @param {*} data 对应内容集合
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* @param {*} rows 行
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* @param {*} cols 列
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*/
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export function createTable({ data, rows, cols }) {
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let table = "";
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let currRow = [];
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for (let i = 0; i < rows + 2; ++i) {
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table += "|\t";
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currRow = [];
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for (let j = 0; j < cols; ++j) {
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const rowIdx = i > 1 ? i - 1 : i;
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i === 1
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? currRow.push("---\t")
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: currRow.push(data[`k_${rowIdx}_${j}`] || "");
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}
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table += currRow.join("\t|\t");
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table += "\t|\n";
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}
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return table;
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}
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export const toBase64 = (file) =>
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new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.readAsDataURL(file);
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reader.onload = () => resolve(reader.result.split(",").pop());
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reader.onerror = (error) => reject(error);
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});
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export function checkImage(file) {
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// check filename suffix
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const isValidSuffix = /\.(gif|jpg|jpeg|png|GIF|JPG|PNG)$/.test(file.name);
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if (!isValidSuffix) {
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return {
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ok: false,
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msg: "请上传 JPG/PNG/GIF 格式的图片",
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};
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}
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// check file size
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const maxSize = 10;
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const valid = file.size / 1024 / 1024 <= maxSize;
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if (!valid) {
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return {
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ok: false,
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msg: `由于公众号限制，图片大小不能超过 ${maxSize}M`,
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};
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}
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return { ok: true };
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}
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/**
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* 获取一个 DOM 元素的所有样式，
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* @param {DOM 元素} element DOM 元素
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* @param {排除的属性} excludes 如果某些属性对结果有不良影响，可以使用这个参数来排除
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* @returns 行内样式拼接结果
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*/
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function getElementStyles(element, excludes = ["width", "height"]) {
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const styles = getComputedStyle(element, null);
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return Object.entries(styles)
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.filter(([key]) => styles.getPropertyValue(key) && !excludes.includes(key))
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.map(([key, value]) => `${key}:${value};`)
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.join("");
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}
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/**
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* 移除左边多余空格
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* @param {*} str
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* @returns
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*/
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export function removeLeft(str) {
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const lines = str.split('\n')
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// 获取应该删除的空白符数量
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const minSpaceNum = lines.filter(item => item.trim())
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.map(item => item.match(/(^\s+)?/)[0].length)
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.sort((a, b) => a - b)[0]
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// 删除空白符
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const newStr = lines
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.map(item => item.slice(minSpaceNum))
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.join('\n')
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return newStr
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}
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