stmux
Version:
Simple Terminal Multiplexing for Node Environments
82 lines (78 loc) • 2.84 kB
JavaScript
/*
** 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.
*/
export default 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
}
}