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/**
* @license
* Copyright (C) 2018 "IoT.bzh"
* Author Sebastien Douheret <sebastien@iot.bzh>
*
* 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.
*/
import { Component, ElementRef, ViewChild, Input, Output, HostListener, EventEmitter, AfterViewInit } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { Terminal } from 'xterm';
import * as fit from 'xterm/lib/addons/fit/fit';
export interface ITerminalFont {
fontFamily: string;
fontSize: string;
lineHeight: number;
charWidth: number;
charHeight: number;
}
@Component({
selector: 'xds-terminal',
styles: [],
template: `
<div #terminalContainer></div>
`,
})
export class TerminalComponent implements AfterViewInit {
private _xterm: Terminal;
private _initDone: boolean;
@ViewChild('terminalContainer') termContainer: ElementRef;
@Output() stdin = new EventEmitter<any>();
@Output() resize = new EventEmitter<{ cols: number, rows: number }>();
constructor() {
this._initDone = false;
Terminal.applyAddon(fit);
this._xterm = new Terminal({
cursorBlink: true,
// useStyle: true,
scrollback: 1000,
rows: 24,
cols: 80,
});
}
// getting the nativeElement only possible after view init
ngAfterViewInit() {
// this now finds the #terminal element
this._xterm.open(this.termContainer.nativeElement);
// the number of rows will determine the size of the terminal screen
(<any>this._xterm).fit();
// Bind input key
this._xterm.on('data', (data) => {
// console.log(data.charCodeAt(0));
this.stdin.emit(this._sanitizeInput(data));
return false;
});
this._initDone = true;
}
@Input('stdout')
set writeData(data) {
if (this._initDone && data !== undefined) {
this._xterm.write(data);
}
}
@Input('disable')
set disable(value: boolean) {
if (!this._initDone) {
return;
}
this._xterm.setOption('disableStdin', value);
if (value) {
this._xterm.blur();
} else {
this._xterm.focus();
}
this._resize();
}
@HostListener('window:resize', ['$event'])
onWindowResize(event) {
this._resize();
}
/*** Private functions ***/
private _sanitizeInput(d) {
// TODO sanitize ?
return d;
}
private _resize() {
const geom = fit.proposeGeometry(this._xterm);
// console.log('DEBUG cols ' + String(geom.cols) + ' rows ' + String(geom.rows));
if (geom.cols < 0 || geom.cols > 2000 || geom.rows < 0 || geom.rows > 2000) {
return;
}
// Update xterm size
this._xterm.resize(geom.cols, geom.rows);
// Send resize event to update remote terminal
this.resize.emit({ cols: geom.cols, rows: geom.rows });
}
}
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