stmux/bin/stmux-6-border.js

Simple Terminal Multiplexing for Node Environments

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
/*
**  stmux -- Simple Terminal Multiplexing for Node Environments
**  Copyright (c) 2017-2024 Dr. Ralf S. Engelschall <rse@engelschall.com>
**
**  Permission is hereby granted, free of charge, to any person obtaining
**  a copy of this software and associated documentation files (the
**  "Software"), to deal in the Software without restriction, including
**  without limitation the rights to use, copy, modify, merge, publish,
**  distribute, sublicense, and/or sell copies of the Software, and to
**  permit persons to whom the Software is furnished to do so, subject to
**  the following conditions:
**
**  The above copyright notice and this permission notice shall be included
**  in all copies or substantial portions of the Software.
**
**  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
**  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
**  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
**  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
**  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
**  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
**  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

class stmuxBorder {
  /*  determine border of terminal  */
  border(term, side) {
    let x1, x2, y1, y2;
    if (side === "left" || side === "right") {
      y1 = term.position.top;
      y2 = y1 + term.position.height - 1;
      if (side === "left") x1 = term.position.left;else x1 = term.position.left + term.position.width - 1;
      x2 = x1;
    } else if (side === "top" || side === "bottom") {
      x1 = term.position.left;
      x2 = x1 + term.position.width - 1;
      if (side === "top") y1 = term.position.top;else y1 = term.position.top + term.position.height - 1;
      y2 = y1;
    }
    return {
      x1,
      x2,
      y1,
      y2,
      side
    };
  }

  /*  find touches  */
  touches(a1, a2, b1, b2) {
    /*  +--a--+
                +--b--+  */
    if (a2 < b1) return 0;
    /*          +--a--+
        +--b--+  */else if (a1 > b2) return 0;
    /*  +---a---+
         +--b--+   */else if (a1 <= b1 && b2 <= a2) return b2 - b1;
    /*   +--a--+
        +---b---+  */else if (b1 <= a1 && a2 <= b2) return a2 - a1;
    /*     +--a--+
        +--b--+   */else if (b1 < a1 && b2 <= a2) return b2 - a1;
    /*  +--a--+
           +--b--+   */else if (a1 <= b1 && b2 > a2) return a2 - b1;
    /*  actually cannot happen!?  */else return 0;
  }
}
exports.default = stmuxBorder;