md/assets/scripts/renderers/wx-renderer.js

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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;
let CODE_FONT_FAMILY = "Menlo, Operator Mono, Consolas, Monaco, monospace";
let merge = function (base, extend) {
return Object.assign({}, base, extend)
};
this.buildTheme = function (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 = function (tokenName, addition) {
let arr = [];
let dict = styleMapping[tokenName];
if (!dict) return '';
for (const key in dict) {
arr.push(key + ':' + dict[key])
}
return `style="${ arr.join(';') + (addition || '') }"`
};
let addFootnote = function (title, link) {
footnoteIndex += 1;
footnotes.push([footnoteIndex, title, link]);
return footnoteIndex
};
this.buildFootnotes = function () {
let footnoteArray = footnotes.map(function (x) {
if (x[1] === x[2]) {
return `<code style="font-size: 90%; opacity: 0.6;">[${ 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 `<h3 ${ getStyles('h3') }>References</h3><p ${ getStyles('footnotes') }>${ footnoteArray.join('\n') }</p>`
};
this.buildAddition = function () {
return '<style>.preview-wrapper pre::before{' +
'font-family:"SourceSansPro","HelveticaNeue",Arial,sans-serif;' +
'position:absolute;' +
'top:0;' +
'right:0;' +
'color:#ccc;' +
'text-align:right;' +
'font-size:0.8em;' +
'padding:5px10px0;' +
'line-height:15px;' +
'height:15px;' +
'font-weight:600;' +
'}</style>'
};
this.setOptions = function (newOpts) {
this.opts = merge(this.opts, newOpts)
};
this.hasFootnotes = function () {
return footnotes.length !== 0
};
this.getRenderer = function () {
footnotes = [];
footnoteIndex = 0;
styleMapping = this.buildTheme(this.opts.theme);
let renderer = new marked.Renderer();
FuriganaMD.register(renderer);
renderer.heading = function (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 = function (text) {
return `<p ${ getStyles('p') }>${ text }</p>`
};
renderer.blockquote = function (text) {
text = text.replace(/<p.*?>/, `<p ${ getStyles('blockquote_p') }>`);
return `<blockquote ${ getStyles('blockquote') }>${ text }</blockquote>`
};
renderer.code = function (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><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 prettyprint" data-lang="${ lang }">`
+ codeLines.join('')
+ `</pre></section>`
};
renderer.codespan = function (text, infoString) {
return `<code ${ getStyles('codespan') }>${ text }</code>`
};
renderer.listitem = function (text) {
return `<span ${ getStyles('listitem') }><span style="margin-right: 10px;"><%s/></span>${ text }</span>`;
};
renderer.list = function (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 = function (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 }"/>${ subText }</figure>`
};
renderer.link = function (href, title, text) {
if (href.indexOf('https://mp.weixin.qq.com') === 0) {
return `<a href="${ 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 = function (text) {
return `<strong ${ getStyles('strong') }>${ text }</strong>`;
};
renderer.em = function (text) {
return `<p ${ getStyles('p', ';font-style: italic;')}>${ text }</p>`
};
renderer.table = function (header, body) {
return `<table class="preview-table"><thead ${ getStyles('thead') }>${ header }</thead><tbody>${ body }</tbody></table>`;
};
renderer.tablecell = function (text, flags) {
return `<td ${ getStyles('td') }>${ text }</td>`;
};
renderer.hr = function () {
return `<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
}
};