Sha256: beb4a4bec20aca797c733dc7fa5601e2ae93b3b0ce039fec402c481b7ea87537
Contents?: true
Size: 1.1 KB
Versions: 46
Compression:
Stored size: 1.1 KB
Contents
"use strict";
const { domSymbolTree } = require("../helpers/internal-constants");
const { nodeRoot, isFollowing, isInclusiveAncestor } = require("../helpers/node");
// Returns 0 if equal, +1 for after and -1 for before
// https://dom.spec.whatwg.org/#concept-range-bp-after
function compareBoundaryPointsPosition(bpA, bpB) {
const { node: nodeA, offset: offsetA } = bpA;
const { node: nodeB, offset: offsetB } = bpB;
if (nodeRoot(nodeA) !== nodeRoot(nodeB)) {
throw new Error(`Internal Error: Boundary points should have the same root!`);
}
if (nodeA === nodeB) {
if (offsetA === offsetB) {
return 0;
} else if (offsetA < offsetB) {
return -1;
}
return 1;
}
if (isFollowing(nodeA, nodeB)) {
return compareBoundaryPointsPosition(bpB, bpA) === -1 ? 1 : -1;
}
if (isInclusiveAncestor(nodeA, nodeB)) {
let child = nodeB;
while (domSymbolTree.parent(child) !== nodeA) {
child = domSymbolTree.parent(child);
}
if (domSymbolTree.index(child) < offsetA) {
return 1;
}
}
return -1;
}
module.exports = {
compareBoundaryPointsPosition
};
Version data entries
46 entries across 46 versions & 2 rubygems