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export function fillEmpty(headings) {
for (let i = 0; i < headings.length; i += 1) {
let j = headings[i - 1]?.level || 0;
if (headings[i].level - j > 1) {
while (j < headings[i].level) {
headings.splice(i, 0, { level: j + 1, text: '' });
j += 1;
}
}
}
return headings;
}
const exitHeadingBranch = (heading, targetLevel) => {
let currentHeading = heading;
while (currentHeading.level > targetLevel) {
currentHeading = currentHeading.parent;
}
return currentHeading;
};
export function toTree(headings) {
fillEmpty(headings);
const tree = [];
let currentHeading;
for (let i = 0; i < headings.length; i += 1) {
const heading = headings[i];
if (heading.level === 1) {
const h = { ...heading, subHeadings: [] };
tree.push(h);
currentHeading = h;
} else if (heading.level > currentHeading.level) {
const h = { ...heading, subHeadings: [], parent: currentHeading };
currentHeading.subHeadings.push(h);
currentHeading = h;
} else if (heading.level <= currentHeading.level) {
currentHeading = exitHeadingBranch(currentHeading, heading.level - 1);
const h = { ...heading, subHeadings: [], parent: currentHeading };
(currentHeading?.subHeadings || headings).push(h);
currentHeading = h;
}
}
return tree;
}
export function getHeadings(editor) {
const headings = [];
editor.state.doc.descendants((node) => {
if (node.type.name !== 'heading') return false;
headings.push({
level: node.attrs.level,
text: node.textContent,
});
return true;
});
return toTree(headings);
}
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