CrazySquirrel/Utils

"use strict";
/**
 * Import additional classes
 */
import UtilsWindow from "./UtilsWindow";
/**
 * Class for working with document
 */
export default class Document {
  /**
   * Get document height
   * @returns {number}
   */
  public static getHeight(objWindow: any = window): number {
    if (UtilsWindow.isWindow(objWindow)) {
      return Math.max(
          objWindow.document.body.scrollHeight,
          objWindow.document.documentElement.scrollHeight,
          objWindow.document.body.offsetHeight,
          objWindow.document.documentElement.offsetHeight,
          objWindow.document.body.clientHeight,
          objWindow.document.documentElement.clientHeight,
      );
    } else {
      return NaN;
    }
  }

  /**
   * Get document width
   * @returns {number}
   */
  public static getWidth(objWindow: any = window): number {
    if (UtilsWindow.isWindow(objWindow)) {
      return Math.max(
          objWindow.document.body.scrollWidth,
          objWindow.document.documentElement.scrollWidth,
          objWindow.document.body.offsetWidth,
          objWindow.document.documentElement.offsetWidth,
          objWindow.document.body.clientWidth,
          objWindow.document.documentElement.clientWidth,
      );
    } else {
      return NaN;
    }
  }

  /**
   * Get document top scroll
   * @param objWindow
   * @return {number}
   */
  public static getScrollTop(objWindow: any = window): number {
    if (UtilsWindow.isWindow(objWindow)) {
      return (
          objWindow.pageYOffset ||
          (
              objWindow.document.documentElement &&
              objWindow.document.documentElement.scrollTop
          ) ||
          (
              objWindow.document.body &&
              objWindow.document.body.scrollTop
          )
      );
    } else {
      return NaN;
    }
  }

  /**
   * Get document left scroll
   * @param objWindow
   * @return {number}
   */
  public static getScrollLeft(objWindow: any = window): number {
    if (UtilsWindow.isWindow(objWindow)) {
      return (
          objWindow.pageXOffset ||
          (
              objWindow.document.documentElement &&
              objWindow.document.documentElement.scrollLeft
          ) ||
          (
              objWindow.document.body &&
              objWindow.document.body.scrollLeft
          )
      );
    } else {
      return NaN;
    }
  }

  /**
   * Get document scrolls
   * @param objWindow
   * @return {{left: number, top: number}}
   */
  public static getScroll(objWindow: any = window): {left: number, top: number} {
    if (UtilsWindow.isWindow(objWindow)) {
      return ({
        left: Document.getScrollLeft(objWindow),
        top: Document.getScrollTop(objWindow),
      });
    } else {
      return ({
        left: NaN,
        top: NaN,
      });
    }
  }
}