@lightningjs/renderer
Version:
Lightning 3 Renderer
72 lines • 2.44 kB
JavaScript
/*
* If not stated otherwise in this file or this component's LICENSE file the
* following copyright and licenses apply:
*
* Copyright 2023 Comcast Cable Communications Management, LLC.
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//Bucket sort implementation for sorting CoreNode arrays by zIndex
export const bucketSortByZIndex = (nodes, min) => {
const buckets = [];
const bucketIndices = [];
//distribute nodes into buckets
for (let i = 0; i < nodes.length; i++) {
const node = nodes[i];
const index = node.props.zIndex - min;
//create bucket if it doesn't exist
if (buckets[index] === undefined) {
buckets[index] = [];
bucketIndices.push(index);
}
buckets[index].push(node);
}
//sort each bucket using insertion sort
for (let i = 1; i < bucketIndices.length; i++) {
const key = bucketIndices[i];
let j = i - 1;
while (j >= 0 && bucketIndices[j] > key) {
bucketIndices[j + 1] = bucketIndices[j];
j--;
}
bucketIndices[j + 1] = key;
}
//flatten buckets
let idx = 0;
for (let i = 0; i < bucketIndices.length; i++) {
const bucket = buckets[bucketIndices[i]];
for (let j = 0; j < bucket.length; j++) {
nodes[idx++] = bucket[j];
}
}
//clean up
buckets.length = 0;
bucketIndices.length = 0;
};
export const findChildIndexById = (node, children) => {
for (let i = 0; i < children.length; i++) {
const child = children[i];
// @ts-ignore - accessing protected property
if (child._id === node._id) {
return i;
}
}
return -1;
};
export const removeChild = (node, children) => {
const index = findChildIndexById(node, children);
if (index !== -1) {
children.splice(index, 1);
}
};
//# sourceMappingURL=collectionUtils.js.map