Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { Point } from './Point.js';
import type { Rectangle } from './Rectangle.js';
import { Shape } from './Shape.js';
import { Table } from './Table.js';
import type { TableData } from './TableData.js';
export class LineStore {
public hLines: Array<Line> = [];
public vLines: Array<Line> = [];
public add(line: Line): void {
if (line.valid) {
if (line.direction === LineDirection.Horizontal) {
this.hLines.push(line);
} else if (line.direction === LineDirection.Vertical) {
this.vLines.push(line);
}
}
}
public addRectangle(rect: Rectangle): void {
for (const line of rect.getLines()) {
this.add(line);
}
}
public getTableData(): Array<TableData> {
const result: Array<TableData> = [];
const tables = this.getTables();
for (const table of tables) {
const data = table.toData();
if (data) {
result.push(data);
}
}
return result;
}
public getTables(): Array<Table> {
const result: Array<Table> = [];
while (this.hLines.length !== 0) {
const hLine = this.hLines.shift();
if (!hLine) continue;
const filled = this.tryFill(result, hLine);
if (filled) continue;
const table = new Table(hLine);
this.fillTable(table);
result.push(table);
}
while (this.vLines.length !== 0) {
const vLine = this.vLines.shift();
if (!vLine) continue;
const filled = this.tryFill(result, vLine);
if (filled) continue;
const table = new Table(vLine);
this.fillTable(table);
result.push(table);
}
const validTables = result.filter((t) => t.isValid);
for (const table of validTables) {
table.normalize();
}
return validTables;
}
public normalize(): void {
this.normalizeHorizontal();
this.normalizeVertical();
}
public normalizeHorizontal() {
this.hLines.sort((l1, l2) => l1.from.y - l2.from.y);
const newLines: Array<Line> = [];
let sameY: Array<Line> = [];
for (const line of this.hLines) {
if (sameY.length === 0) {
sameY.push(line);
} else if (Math.abs(sameY[0]?.from.y - line.from.y) < Shape.tolerance) {
sameY.push(line);
} else {
const merged = this.margeHorizontalLines(sameY);
newLines.push(...merged);
sameY = [line];
}
}
if (sameY.length > 0) {
const merged = this.margeHorizontalLines(sameY);
newLines.push(...merged);
}
this.hLines = newLines;
}
public normalizeVertical() {
this.vLines.sort((l1, l2) => l1.from.x - l2.from.x);
const newLines: Array<Line> = [];
let sameX: Array<Line> = [];
for (const line of this.vLines) {
if (sameX.length === 0) {
sameX.push(line);
} else if (Math.abs(sameX[0]?.from.x - line.from.x) < Shape.tolerance) {
sameX.push(line);
} else {
const merged = this.margeVerticalLines(sameX);
newLines.push(...merged);
sameX = [line];
}
}
if (sameX.length > 0) {
const merged = this.margeVerticalLines(sameX);
newLines.push(...merged);
}
this.vLines = newLines;
}
private fillTable(table: Table): void {
const newVLines: Array<Line> = [];
const newHLines: Array<Line> = [];
for (const vLine of this.vLines) {
if (!table.add(vLine)) {
newVLines.push(vLine);
}
}
for (const hLine of this.hLines) {
if (!table.add(hLine)) {
newHLines.push(hLine);
}
}
this.hLines = newHLines;
this.vLines = newVLines;
}
private tryFill(tables: Array<Table>, line: Line): boolean {
for (const table of tables) {
if (table.add(line)) {
this.fillTable(table);
return true;
}
}
return false;
}
private margeHorizontalLines(sameYLines: Array<Line>): Array<Line> {
const result: Array<Line> = [];
sameYLines.sort((l1, l2) => l1.from.x - l2.from.x);
const sameY = sameYLines[0]?.from.y;
if (sameY === undefined) return result;
let minX: number = Number.MAX_SAFE_INTEGER;
let maxX: number = Number.MIN_SAFE_INTEGER;
for (const line of sameYLines) {
if (line.from.x - maxX < Shape.tolerance) {
if (line.from.x < minX) {
minX = line.from.x;
}
if (line.to.x > maxX) {
maxX = line.to.x;
}
} else {
if (maxX > minX) {
result.push(new Line(new Point(minX, sameY), new Point(maxX, sameY)));
}
minX = line.from.x;
maxX = line.to.x;
}
}
const last = result[result.length - 1];
if (last) {
if (last.from.x !== minX && last.to.x !== maxX) {
result.push(new Line(new Point(minX, sameY), new Point(maxX, sameY)));
}
} else {
result.push(new Line(new Point(minX, sameY), new Point(maxX, sameY)));
}
return result;
}
private margeVerticalLines(sameXLines: Array<Line>): Array<Line> {
const result: Array<Line> = [];
sameXLines.sort((l1, l2) => l1.from.y - l2.from.y);
const sameX = sameXLines[0]?.from.x;
if (sameX === undefined) return result;
let minY: number = Number.MAX_SAFE_INTEGER;
let maxY: number = Number.MIN_SAFE_INTEGER;
for (const line of sameXLines) {
if (line.from.y - maxY < Shape.tolerance) {
if (line.from.y < minY) {
minY = line.from.y;
}
if (line.to.y > maxY) {
maxY = line.to.y;
}
} else {
if (maxY > minY) {
result.push(new Line(new Point(sameX, minY), new Point(sameX, maxY)));
}
minY = line.from.y;
maxY = line.to.y;
}
}
const last = result[result.length - 1];
if (last) {
if (last.from.y !== minY && last.to.y !== maxY) {
result.push(new Line(new Point(sameX, minY), new Point(sameX, maxY)));
}
} else {
result.push(new Line(new Point(sameX, minY), new Point(sameX, maxY)));
}
return result;
}
}
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