gotty/js/src/hterm.ts

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import * as bare from "libapps";
export class Hterm {
elem: HTMLElement;
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term: bare.hterm.Terminal;
io: bare.hterm.IO;
columns: number;
rows: number;
// to "show" the current message when removeMessage() is called
message: string;
constructor(elem: HTMLElement) {
this.elem = elem;
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bare.hterm.defaultStorage = new bare.lib.Storage.Memory();
this.term = new bare.hterm.Terminal();
this.term.getPrefs().set("send-encoding", "raw");
this.term.decorate(this.elem);
this.io = this.term.io.push();
this.term.installKeyboard();
};
info(): { columns: number, rows: number } {
return { columns: this.columns, rows: this.rows };
};
output(data: string) {
if (this.term.io != null) {
this.term.io.writeUTF8(data);
}
};
showMessage(message: string, timeout: number) {
this.message = message;
if (timeout > 0) {
this.term.io.showOverlay(message, timeout);
} else {
this.term.io.showOverlay(message, null);
}
};
removeMessage(): void {
// there is no hideOverlay(), so show the same message with 0 sec
this.term.io.showOverlay(this.message, 0);
}
setWindowTitle(title: string) {
this.term.setWindowTitle(title);
};
setPreferences(value: object) {
Object.keys(value).forEach((key) => {
this.term.getPrefs().set(key, value[key]);
});
};
onInput(callback: (input: string) => void) {
this.io.onVTKeystroke = (data) => {
callback(data);
};
this.io.sendString = (data) => {
callback(data);
};
};
onResize(callback: (colmuns: number, rows: number) => void) {
this.io.onTerminalResize = (columns: number, rows: number) => {
this.columns = columns;
this.rows = rows;
callback(columns, rows);
};
};
deactivate(): void {
this.io.onVTKeystroke = function(){};
this.io.sendString = function(){};
this.io.onTerminalResize = function(){};
this.term.uninstallKeyboard();
}
reset(): void {
this.removeMessage();
this.term.installKeyboard();
}
close(): void {
this.term.uninstallKeyboard();
}
}