md/assets/scripts/renderers/wx-renderer.js
yanglbme 5d13acb1e0 feat: close brackets automatically
自动关闭括号
2019-12-07 18:03:26 +08:00

192 lines
6.4 KiB
JavaScript

let WxRenderer = function (opts) {
this.opts = opts;
let ENV_USE_REFERENCES = true;
let ENV_STRETCH_IMAGE = true;
let footnotes = [];
let footnoteIndex = 0;
let styleMapping = null;
const CODE_FONT_FAMILY = "Menlo, Operator Mono, Consolas, Monaco, monospace";
let merge = (base, extend) => Object.assign({}, base, extend);
this.buildTheme = themeTpl => {
let mapping = {};
let base = merge(themeTpl.BASE, {
'font-family': this.opts.fonts,
'font-size': this.opts.size
});
let base_block = merge(base, {});
for (let ele in themeTpl.inline) {
if (themeTpl.inline.hasOwnProperty(ele)) {
let style = themeTpl.inline[ele];
if (ele === 'codespan') {
style['font-family'] = CODE_FONT_FAMILY;
style['white-space'] = 'normal';
}
mapping[ele] = merge(base, style);
}
}
for (let ele in themeTpl.block) {
if (themeTpl.block.hasOwnProperty(ele)) {
let style = themeTpl.block[ele];
if (ele === 'code') {
style['font-family'] = CODE_FONT_FAMILY;
}
mapping[ele] = merge(base_block, style);
}
}
return mapping;
};
let getStyles = (tokenName, addition) => {
let arr = [];
let dict = styleMapping[tokenName];
if (!dict) return '';
for (const key in dict) {
arr.push(key + ':' + dict[key]);
}
return `style="${arr.join(';') + (addition || '')}"`;
};
let addFootnote = (title, link) => {
footnotes.push([++footnoteIndex, title, link]);
return footnoteIndex;
};
this.buildFootnotes = () => {
let footnoteArray = footnotes.map(x => {
if (x[1] === x[2]) {
return `<code style="font-size: 90%; opacity: 0.6;">[${x[0]}]</code>: <i>${x[1]}</i><br/>`;
}
return `<code style="font-size: 90%; opacity: 0.6;">[${x[0]}]</code> ${x[1]}: <i>${x[2]}</i><br/>`;
});
return `<h4 ${getStyles('h4')}>引用链接</h4><p ${getStyles('footnotes')}>${footnoteArray.join('\n')}</p>`;
};
this.buildAddition = () => {
return `
<style>
.preview-wrapper pre::before {
font-family: "SourceSansPro", "HelveticaNeue", Arial, sans-serif;
position: absolute;
top: 0;
right: 0;
color: #ccc;
text-align: center;
font-size: 0.8em;
padding: 5px 10px 0;
line-height: 15px;
height: 15px;
font-weight: 600;
}
</style>
`;
}
this.setOptions = newOpts => {
this.opts = merge(this.opts, newOpts);
};
this.hasFootnotes = () => footnotes.length !== 0;
this.getRenderer = () => {
footnotes = [];
footnoteIndex = 0;
styleMapping = this.buildTheme(this.opts.theme);
let renderer = new marked.Renderer();
renderer.heading = (text, level) => {
switch (level) {
case 1:
return `<h1 ${getStyles('h1')}>${text}</h1>`;
case 2:
return `<h2 ${getStyles('h2')}>${text}</h2>`;
case 3:
return `<h3 ${getStyles('h3')}>${text}</h3>`;
default:
return `<h4 ${getStyles('h4')}>${text}</h4>`;
}
};
renderer.paragraph = text => `<p ${getStyles('p')}>${text}</p>`;
renderer.blockquote = text => {
text = text.replace(/<p.*?>/, `<p ${getStyles('blockquote_p')}>`);
return `<blockquote ${getStyles('blockquote')}>${text}</blockquote>`;
};
renderer.code = (text, infoString) => {
text = text.replace(/</g, "&lt;");
text = text.replace(/>/g, "&gt;");
let lines = text.split('\n');
let codeLines = [];
let numbers = [];
for (let i = 0; i < lines.length; i++) {
const line = lines[i];
codeLines.push(`<code class="prettyprint"><span class="code-snippet_outer">${(line || '<br>')}</span></code>`);
numbers.push('<li></li>');
}
let lang = infoString || '';
return `
<section class="code-snippet__fix code-snippet__js">
<ul class="code-snippet__line-index code-snippet__js">${numbers.join('')}</ul>
<pre class="code-snippet__js" data-lang="${lang}">
${codeLines.join('')}
</pre>
</section>
`;
};
renderer.codespan = (text, infoString) => `<code ${getStyles('codespan')}>${text}</code>`;
renderer.listitem = text => `<span ${getStyles('listitem')}><span style="margin-right: 10px;"><%s/></span>${text}</span>`;
renderer.list = (text, ordered, start) => {
text = text.replace(/<\/*p.*?>/g, '');
let segments = text.split(`<%s/>`);
if (!ordered) {
text = segments.join('•');
return `<p ${getStyles('ul')}>${text}</p>`;
}
text = segments[0];
for (let i = 1; i < segments.length; i++) {
text = text + i + '.' + segments[i];
}
return `<p ${getStyles('ol')}>${text}</p>`;
};
renderer.image = (href, title, text) => {
let subText = '';
if (text) {
subText = `<figcaption ${getStyles('figcaption')}>${text}</figcaption>`;
}
let figureStyles = getStyles('figure');
let imgStyles = getStyles(ENV_STRETCH_IMAGE ? 'image' : 'image_org');
return `<figure ${figureStyles}><img ${imgStyles} src="${href}" title="${title}" alt="${text}"/>${subText}</figure>`;
};
renderer.link = (href, title, text) => {
if (href.indexOf('https://mp.weixin.qq.com') === 0) {
return `<a href="${href}" title="${(title || text)}" ${getStyles('wx_link')}>${text}</a>`;
} else if (href === text) {
return text;
} else {
if (ENV_USE_REFERENCES) {
let ref = addFootnote(title || text, href);
return `<span ${getStyles('link')}>${text}<sup>[${ref}]</sup></span>`;
} else {
return `<a href="${href}" title="${(title || text)}" ${getStyles('link')}>${text}</a>`;
}
}
};
renderer.strong = text => `<strong ${getStyles('strong')}>${text}</strong>`;
renderer.em = text => `<p ${getStyles('p', ';font-style: italic;')}>${text}</p>`;
renderer.table = (header, body) => `<table class="preview-table"><thead ${getStyles('thead')}>${header}</thead><tbody>${body}</tbody></table>`;
renderer.tablecell = (text, flags) => `<td ${getStyles('td')}>${text}</td>`;
renderer.hr = () => `<hr style="border-style: solid;border-width: 1px 0 0;border-color: rgba(0,0,0,0.1);-webkit-transform-origin: 0 0;-webkit-transform: scale(1, 0.5);transform-origin: 0 0;transform: scale(1, 0.5);">`;
return renderer;
}
};