@jbrowse/core/esm/util/layouts/PrecomputedLayout.js

JBrowse 2 core libraries used by plugins

import Flatbush from "../flatbush/index.js";
export default class PrecomputedLayout {
    rectangles;
    totalHeight;
    maxHeightReached;
    index;
    indexData = [];
    constructor({ rectangles, totalHeight, maxHeightReached }) {
        this.rectangles = new Map(Object.entries(rectangles));
        this.totalHeight = totalHeight;
        this.maxHeightReached = maxHeightReached;
        this.buildIndex();
    }
    buildIndex() {
        if (this.rectangles.size === 0) {
            return;
        }
        this.index = new Flatbush(this.rectangles.size);
        this.indexData = [];
        for (const [name, rect] of this.rectangles) {
            this.index.add(rect[0], rect[1], rect[2], rect[3]);
            this.indexData.push({ name, rect });
        }
        this.index.finish();
    }
    addRect(id) {
        const rect = this.rectangles.get(id);
        if (!rect) {
            throw new Error(`id ${id} not found in precomputed feature layout`);
        }
        return rect[1];
    }
    getRectangles() {
        return this.rectangles;
    }
    getTotalHeight() {
        return this.totalHeight;
    }
    collides(_rect, _top) {
        throw new Error('Method not implemented.');
    }
    getByCoord(x, y) {
        if (!this.index) {
            return undefined;
        }
        const results = this.index.search(x, y, x + 1, y + 1);
        if (results.length > 0) {
            return this.indexData[results[0]]?.name;
        }
        return undefined;
    }
    getByID(id) {
        return this.rectangles.get(id);
    }
    addRectToBitmap(_rect, _data) {
        throw new Error('Method not implemented.');
    }
    discardRange(_left, _right) {
        throw new Error('Method not implemented.');
    }
    serializeRegion(_region) {
        throw new Error('Method not implemented.');
    }
    toJSON() {
        return {
            rectangles: Object.fromEntries(this.rectangles),
            totalHeight: this.totalHeight,
            maxHeightReached: false,
        };
    }
}