zxing-js/library

/*
* Copyright 2013 ZXing authors
*
* 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.
*/

// package com.google.zxing.pdf417.decoder;

// import com.google.zxing.NotFoundException;
import NotFoundException from '../../NotFoundException';
// import com.google.zxing.ResultPoint;
import ResultPoint from '../../ResultPoint';
// import com.google.zxing.common.BitMatrix;
import BitMatrix from '../../common/BitMatrix';
import { int } from '../../../customTypings';

/**
 * @author Guenther Grau
 */
export default /*final*/ class BoundingBox {

  private /*final*/ image: BitMatrix;
  private /*final*/ topLeft: ResultPoint;
  private /*final*/ bottomLeft: ResultPoint;
  private /*final*/ topRight: ResultPoint;
  private /*final*/ bottomRight: ResultPoint;
  private /*final*/ minX: int;
  private /*final*/ maxX: int;
  private /*final*/ minY: int;
  private /*final*/ maxY: int;

  constructor( image: BitMatrix|BoundingBox,
               topLeft?: ResultPoint,
               bottomLeft?: ResultPoint,
               topRight?: ResultPoint,
               bottomRight?: ResultPoint)  {
    if (image instanceof BoundingBox) {
      this.constructor_2(image);
    } else {
      this.constructor_1(image, topLeft, bottomLeft, topRight, bottomRight);
    }
  }

  /**
   *
   * @param image
   * @param topLeft
   * @param bottomLeft
   * @param topRight
   * @param bottomRight
   *
   * @throws NotFoundException
   */
  private constructor_1( image: BitMatrix,
               topLeft: ResultPoint,
               bottomLeft: ResultPoint,
               topRight: ResultPoint,
               bottomRight: ResultPoint)  {
    const leftUnspecified = topLeft == null || bottomLeft == null;
    const rightUnspecified = topRight == null || bottomRight == null;
    if (leftUnspecified && rightUnspecified) {
      throw new NotFoundException();
    }
    if (leftUnspecified) {
      topLeft = new ResultPoint(0, topRight.getY());
      bottomLeft = new ResultPoint(0, bottomRight.getY());
    } else if (rightUnspecified) {
      topRight = new ResultPoint(image.getWidth() - 1, topLeft.getY());
      bottomRight = new ResultPoint(image.getWidth() - 1, bottomLeft.getY());
    }
    this.image = image;
    this.topLeft = topLeft;
    this.bottomLeft = bottomLeft;
    this.topRight = topRight;
    this.bottomRight = bottomRight;
    this.minX = <int> Math.trunc(Math.min(topLeft.getX(), bottomLeft.getX()));
    this.maxX = <int> Math.trunc(Math.max(topRight.getX(), bottomRight.getX()));
    this.minY = <int> Math.trunc(Math.min(topLeft.getY(), topRight.getY()));
    this.maxY = <int> Math.trunc(Math.max(bottomLeft.getY(), bottomRight.getY()));
  }

  private constructor_2(boundingBox: BoundingBox) {
    this.image = boundingBox.image;
    this.topLeft = boundingBox.getTopLeft();
    this.bottomLeft = boundingBox.getBottomLeft();
    this.topRight = boundingBox.getTopRight();
    this.bottomRight = boundingBox.getBottomRight();
    this.minX = boundingBox.getMinX();
    this.maxX = boundingBox.getMaxX();
    this.minY = boundingBox.getMinY();
    this.maxY = boundingBox.getMaxY();
  }

  /**
   * @throws NotFoundException
   */
  static merge( leftBox: BoundingBox, rightBox: BoundingBox): BoundingBox {
    if (leftBox == null) {
      return rightBox;
    }
    if (rightBox == null) {
      return leftBox;
    }
    return new BoundingBox(leftBox.image, leftBox.topLeft, leftBox.bottomLeft, rightBox.topRight, rightBox.bottomRight);
  }

  /**
   * @throws NotFoundException
   */
  addMissingRows(missingStartRows: int, missingEndRows: int, isLeft: boolean): BoundingBox {
    let newTopLeft: ResultPoint = this.topLeft;
    let newBottomLeft: ResultPoint = this.bottomLeft;
    let newTopRight: ResultPoint = this.topRight;
    let newBottomRight: ResultPoint = this.bottomRight;

    if (missingStartRows > 0) {
      let top: ResultPoint = isLeft ? this.topLeft : this.topRight;
      let newMinY: int = <int> Math.trunc(top.getY() - missingStartRows);
      if (newMinY < 0) {
        newMinY = 0;
      }
      let newTop: ResultPoint = new ResultPoint(top.getX(), newMinY);
      if (isLeft) {
        newTopLeft = newTop;
      } else {
        newTopRight = newTop;
      }
    }

    if (missingEndRows > 0) {
      let bottom: ResultPoint = isLeft ? this.bottomLeft : this.bottomRight;
      let newMaxY: int = <int> Math.trunc(bottom.getY() + missingEndRows);
      if (newMaxY >= this.image.getHeight()) {
        newMaxY = this.image.getHeight() - 1;
      }
      let newBottom: ResultPoint = new ResultPoint(bottom.getX(), newMaxY);
      if (isLeft) {
        newBottomLeft = newBottom;
      } else {
        newBottomRight = newBottom;
      }
    }

    return new BoundingBox(this.image, newTopLeft, newBottomLeft, newTopRight, newBottomRight);
  }

  getMinX(): int {
    return this.minX;
  }

  getMaxX(): int {
    return this.maxX;
  }

  getMinY(): int {
    return this.minY;
  }

  getMaxY(): int {
    return this.maxY;
  }

   getTopLeft(): ResultPoint {
    return this.topLeft;
  }

   getTopRight(): ResultPoint {
    return this.topRight;
  }

   getBottomLeft(): ResultPoint {
    return this.bottomLeft;
  }

   getBottomRight(): ResultPoint {
    return this.bottomRight;
  }

}