@podlite/schema
Version:
AST tools for Podlite markup language
79 lines • 2.86 kB
JavaScript
import makeAttrs from './helpers/config';
export default () => tree => {
const isNodesEqual = (n1, n2) =>
// if nodes items
(n1.name === 'item' || n1.name === 'defn') &&
n2.name === n1.name &&
n1['level'] === n2.level &&
isNumbered(n1) === isNumbered(n2);
const isNumbered = node => Boolean(makeAttrs(node, {}).exists('numbered'));
const group = (a, level = 1) => {
const isInListMode = a => {
return a.length > 0 && a[a.length - 1].type === 'list';
};
const getList = a => {
if (isInListMode(a))
return a[a.length - 1];
};
const isInsertableToList = (l, i) => (i.name && i.name === 'item' && i.type && i.type === 'block') || i.type === 'blankline';
let lastItem = {};
let result = a.reduce((a, i) => {
// skip items out of level
if (i.name === 'item' && i.type === 'block' && i.level < level) {
return [...a, i];
}
if (i.name === 'item' &&
i.type === 'block' &&
(!isInListMode(a) ||
// different type of list and item
// at the same level
(i.level === level && getList(a).list !== (isNumbered(i) ? 'ordered' : 'itemized')))) {
// create empty list
// list = ['ordered', 'variable', 'itemized']
a.push({
type: 'list',
level: i.level,
content: [],
list: isNumbered(i) ? 'ordered' : 'itemized',
});
}
// main logic
if (isInListMode(a) && isInsertableToList(getList(a), i)) {
// getlist and push item to them
getList(a).content.push(i);
}
else {
a.push(i);
}
return a;
}, []);
// convert grouped items into object 'itemlist'
/**
* { type = 'list',
* ordered = [true, false]
* content = [ .... ]
* list = ['ordered', 'variable', 'itemized']
*/
return result.map(item => {
// process any item with content ( except formatting codes)
if (item.content && item.type !== 'fcode') {
item.content = group(item.content, item.level + 1);
}
return item;
});
};
const visit = node => {
if (Array.isArray(node)) {
node = group(node);
}
else {
if (node.type === 'block' && node.name !== 'table') {
node.content = group(node.content);
}
}
return node;
};
tree = visit(tree);
return tree;
};
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