90 lines
3 KiB
JavaScript
90 lines
3 KiB
JavaScript
|
/**
|
||
|
* The purpose of this file is to modify Markdown source such that templated code (embedded ruby currently) can be temporarily wrapped and unwrapped in codeblocks:
|
||
|
* 1. `wrap()`: temporarily wrap in codeblocks (useful for a WYSIWYG editing experience)
|
||
|
* 2. `unwrap()`: undo the temporarily wrapped codeblocks (useful for Markdown editing experience and saving edits)
|
||
|
*
|
||
|
* Without this `templater`, the templated code is otherwise interpreted as Markdown content resulting in loss of spacing, indentation, escape characters, etc.
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
const ticks = '```';
|
||
|
const marker = 'sse';
|
||
|
const wrapPrefix = `${ticks} ${marker}\n`; // Space intentional due to https://github.com/nhn/tui.editor/blob/6bcec75c69028570d93d973aa7533090257eaae0/libs/to-mark/src/renderer.gfm.js#L26
|
||
|
const wrapPostfix = `\n${ticks}`;
|
||
|
const markPrefix = `${marker}-${Date.now()}`;
|
||
|
|
||
|
const reHelpers = {
|
||
|
template: `.| |\\t|\\n(?!(\\n|${markPrefix}))`,
|
||
|
openTag: '<[a-zA-Z]+.*?>',
|
||
|
closeTag: '</.+>',
|
||
|
};
|
||
|
const reTemplated = new RegExp(`(^${wrapPrefix}(${reHelpers.template})+?${wrapPostfix}$)`, 'gm');
|
||
|
const rePreexistingCodeBlocks = new RegExp(`(^${ticks}.*\\n(.|\\s)+?${ticks}$)`, 'gm');
|
||
|
const reHtmlMarkup = new RegExp(
|
||
|
`^((${reHelpers.openTag}){1}(${reHelpers.template})*(${reHelpers.closeTag}){1})$`,
|
||
|
'gm',
|
||
|
);
|
||
|
const reEmbeddedRubyBlock = new RegExp(`(^<%(${reHelpers.template})+%>$)`, 'gm');
|
||
|
const reEmbeddedRubyInline = new RegExp(`(^.*[<|<]%(${reHelpers.template})+$)`, 'gm');
|
||
|
|
||
|
const patternGroups = {
|
||
|
ignore: [rePreexistingCodeBlocks],
|
||
|
// Order is intentional (general to specific) where HTML markup is marked first, then ERB blocks, then inline ERB
|
||
|
// Order in combo with the `mark()` algorithm is used to mitigate potential duplicate pattern matches (ERB nested in HTML for example)
|
||
|
allow: [reHtmlMarkup, reEmbeddedRubyBlock, reEmbeddedRubyInline],
|
||
|
};
|
||
|
|
||
|
const mark = (source, groups) => {
|
||
|
let text = source;
|
||
|
let id = 0;
|
||
|
const hash = {};
|
||
|
|
||
|
Object.entries(groups).forEach(([groupKey, group]) => {
|
||
|
group.forEach(pattern => {
|
||
|
const matches = text.match(pattern);
|
||
|
if (matches) {
|
||
|
matches.forEach(match => {
|
||
|
const key = `${markPrefix}-${groupKey}-${id}`;
|
||
|
text = text.replace(match, key);
|
||
|
hash[key] = match;
|
||
|
id += 1;
|
||
|
});
|
||
|
}
|
||
|
});
|
||
|
});
|
||
|
|
||
|
return { text, hash };
|
||
|
};
|
||
|
|
||
|
const unmark = (text, hash) => {
|
||
|
let source = text;
|
||
|
|
||
|
Object.entries(hash).forEach(([key, value]) => {
|
||
|
const newVal = key.includes('ignore') ? value : `${wrapPrefix}${value}${wrapPostfix}`;
|
||
|
source = source.replace(key, newVal);
|
||
|
});
|
||
|
|
||
|
return source;
|
||
|
};
|
||
|
|
||
|
const unwrap = source => {
|
||
|
let text = source;
|
||
|
const matches = text.match(reTemplated);
|
||
|
|
||
|
if (matches) {
|
||
|
matches.forEach(match => {
|
||
|
const initial = match.replace(`${wrapPrefix}`, '').replace(`${wrapPostfix}`, '');
|
||
|
text = text.replace(match, initial);
|
||
|
});
|
||
|
}
|
||
|
|
||
|
return text;
|
||
|
};
|
||
|
|
||
|
const wrap = source => {
|
||
|
const { text, hash } = mark(unwrap(source), patternGroups);
|
||
|
return unmark(text, hash);
|
||
|
};
|
||
|
|
||
|
export default { wrap, unwrap };
|