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Client.js
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Client.js
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/*
* Copyright (c) 2013-2022 Antoine Martin <antoine@xpra.org>
* Copyright (c) 2016 David Brushinski <dbrushinski@spikes.com>
* Copyright (c) 2014 Joshua Higgins <josh@kxes.net>
* Copyright (c) 2015-2016 Spikes, Inc.
* Licensed under MPL 2.0
*
* xpra client
*
* requires:
* Protocol.js
* Window.js
* Keycodes.js
*/
const XPRA_CLIENT_FORCE_NO_WORKER = false;
const CLIPBOARD_IMAGES = true;
const CLIPBOARD_EVENT_DELAY = 100;
const DECODE_WORKER = !!window.createImageBitmap;
const SHOW_START_MENU = true;
const FILE_SIZE_LIMIT = 4 * 1024 * 1024 * 1024; //are we even allowed to allocate this much memory?
const FILE_CHUNKS_SIZE = 128 * 1024;
const MAX_CONCURRENT_FILES = 5;
const CHUNK_TIMEOUT = 10 * 1000;
const TEXT_PLAIN = "text/plain";
const UTF8_STRING = "UTF8_STRING";
const TEXT_HTML = "text/html";
const FLOAT_MENU_SELECTOR = "#float_menu";
const PASTEBOARD_SELECTOR = "#pasteboard";
const WINDOW_PREVIEW_SELECTOR = "#window_preview";
const BELL_SOUND = "data:audio/wav;base64,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";
const METADATA_SUPPORTED = [
"fullscreen", "maximized",
"iconic", "above", "below",
"title", "size-hints",
"class-instance", "transient-for", "window-type",
"has-alpha", "decorations", "override-redirect",
"tray", "modal", "opacity",
]
// This option adds the CSS class .gpu-trigger to the windows.
// The article at https://www.urbaninsight.com/article/improving-html5-app-performance-gpu-accelerated-css-transitions
// states that adding 'transform: transale3d(0,0,0);' is the strongest CSS indication for the browser to enable hardware acceleration.
const TRY_GPU_TRIGGER = true;
function truncate(input) {
if (!input) {
return input;
}
const s = input.toString();
if (s.length > 5) {
return s.slice(0, 5) + "..."; // eslint-disable-line prefer-template
}
return s;
}
class XpraClient {
constructor(container) {
// the container div is the "screen" on the HTML page where we
// are able to draw our windows in.
this.container = document.querySelector(`#${container}`);
if (!this.container) {
throw new Error("invalid container element");
}
// assign callback for window resize event
if (window.jQuery) {
jQuery(window).resize(
jQuery.debounce(250, (e) => this._screen_resized(e))
);
}
this.protocol = null;
this.init_settings();
this.init_state();
}
init_settings() {
//server:
this.host = null;
this.port = null;
this.ssl = null;
this.webtransport = false;
this.path = "";
this.username = "";
this.passwords = [];
this.insecure = false;
this.uri = "";
this.packet_encoder = null;
//connection options:
this.sharing = false;
this.open_url = true;
this.steal = true;
this.remote_logging = true;
this.debug_categories = [];
this.start_new_session = null;
this.clipboard_enabled = false;
this.clipboard_poll = false;
this.clipboard_preferred_format = TEXT_PLAIN;
this.file_transfer = false;
this.remote_file_size_limit = 0;
this.remote_file_chunks = 0;
this.send_chunks_in_progress = new Map();
this.receive_chunks_in_progress = new Map();
this.keyboard_layout = null;
this.printing = false;
this.key_packets = [];
this.clipboard_delayed_event_time = 0;
this.scale = 1;
this.vrefresh = -1;
this.bandwidth_limit = 0;
this.reconnect = true;
this.reconnect_count = 5;
this.reconnect_in_progress = false;
this.reconnect_delay = 1000; //wait 1 second before retrying
this.reconnect_attempt = 0;
this.swap_keys = Utilities.isMacOS();
this.HELLO_TIMEOUT = 30_000;
this.PING_TIMEOUT = 15_000;
this.PING_GRACE = 2000;
this.PING_FREQUENCY = 5000;
this.INFO_FREQUENCY = 1000;
this.uuid = Utilities.getHexUUID();
this.offscreen_api = false;
this.try_gpu = TRY_GPU_TRIGGER;
this.init_encodings();
}
init_encodings() {
this.encoding = "auto";
//basic set of encodings:
//(more may be added after checking via the DecodeWorker)
this.supported_encodings = [
"jpeg",
"png",
"png/P",
"png/L",
"rgb",
"rgb32",
"rgb24",
"scroll",
"void",
];
//extra encodings we enable if validated via the decode worker:
//(we also validate jpeg and png as a sanity check)
this.check_encodings = [
"jpeg",
"png",
"png/P",
"png/L",
"rgb",
"rgb32",
"rgb24",
"scroll",
"webp",
"void",
"avif",
];
let video_max_size = [1024, 768];
if (this.offscreen_api) {
video_max_size = [4096, 4096];
}
this.encoding_options = {
"": this.encoding,
"icons" : {
"max_size": [30, 30],
},
"transparency": true,
"rgb_lz4": (lz4 && lz4.decode != "undefined"),
"decoder-speed": { "video": 0 },
"color-gamut": Utilities.getColorGamut(),
"video_scaling": true,
"video_max_size": video_max_size,
"full_csc_modes": {
"mpeg1": ["YUV420P"],
"h264": ["YUV420P"],
"mpeg4+mp4": ["YUV420P"],
"h264+mp4": ["YUV420P"],
"vp8+webm": ["YUV420P"],
"webp": ["BGRX", "BGRA"],
"jpeg": ["BGRX", "BGRA", "BGR", "RGBX", "RGBA", "RGB", "YUV420P", "YUV422P", "YUV444P"],
"vp8": ["YUV420P"],
},
"h264": {
"score-delta": 80,
"YUV420P": {
"profile": "baseline",
"level": "2.1",
"cabac": false,
"deblocking-filter": false,
"fast-decode": true,
},
},
"h264+mp4": {
"score-delta": 50,
"YUV420P": {
"profile": "baseline",
"level": "3.0",
},
},
//prefer unmuxed VPX
"vp8": {
"score-delta": 70,
},
"mpeg4+mp4": {
"score-delta": 40,
},
"vp8+webm": {
"score-delta": 40,
},
};
}
init_state() {
// state
this.connected = false;
this.desktop_width = 0;
this.desktop_height = 0;
this.server_remote_logging = false;
this.server_start_time = -1;
this.client_start_time = new Date();
// some client stuff
this.capabilities = {};
this.RGB_FORMATS = ["RGBX", "RGBA", "RGB"];
this.disconnect_reason = null;
this.password_prompt_fn = null;
this.keycloak_prompt_fn = null;
// audio
this.audio = null;
this.audio_enabled = false;
this.audio_mediasource_enabled = MediaSourceUtil.getMediaSourceClass() != undefined;
this.audio_aurora_enabled = typeof AV !== "undefined" &&
AV != undefined &&
AV.Decoder != undefined &&
AV.Player.fromXpraSource != undefined;
this.audio_codecs = {};
this.audio_framework = null;
this.audio_aurora_ctx = null;
this.audio_codec = null;
this.audio_context = new AudioContext();
this.audio_state = null;
this.aurora_codecs = {};
this.mediasource_codecs = {};
// encryption
this.encryption = false;
this.encryption_key = null;
this.cipher_in_caps = null;
this.cipher_out_caps = null;
// detect locale change:
this.browser_language = Utilities.getFirstBrowserLanguage();
this.browser_language_change_embargo_time = 0;
this.key_layout = null;
this.last_keycode_pressed = 0;
this.last_key_packet = [];
// mouse
this.buttons_pressed = new Set();
this.last_button_event = [-1, false, -1, -1];
this.mousedown_event = null;
this.last_mouse_x = null;
this.last_mouse_y = null;
this.wheel_delta_x = 0;
this.wheel_delta_y = 0;
this.mouse_grabbed = false;
this.scroll_reverse_x = false;
this.scroll_reverse_y = "auto";
// clipboard
this.clipboard_direction = default_settings["clipboard_direction"] || "both";
this.clipboard_datatype = null;
this.clipboard_buffer = "";
this.clipboard_server_buffers = {};
this.clipboard_pending = false;
this.clipboard_targets = [TEXT_HTML, UTF8_STRING, "TEXT", "STRING", TEXT_PLAIN];
// printing / file-transfer:
this.remote_printing = false;
this.remote_file_transfer = false;
this.remote_open_files = false;
// hello
this.hello_timer = null;
this.info_timer = null;
this.info_request_pending = false;
this.server_last_info = {};
// ping
this.ping_timeout_timer = null;
this.ping_grace_timer = null;
this.ping_timer = null;
this.last_ping_server_time = 0;
this.last_ping_local_time = 0;
this.last_ping_echoed_time = 0;
this.server_ping_latency = 0;
this.client_ping_latency = 0;
this.server_load = null;
this.server_ok = false;
//packet handling
this.decode_worker = null;
// floating menu
this.toolbar_position = "top";
this.server_display = "";
this.server_platform = "";
this.server_resize_exact = false;
this.server_screen_sizes = [];
this.server_is_desktop = false;
this.server_is_shadow = false;
this.server_readonly = false;
this.server_connection_data = false;
this.xdg_menu = null;
// a list of our windows
this.id_to_window = {};
this.ui_events = 0;
this.pending_redraw = [];
this.draw_pending = 0;
// basic window management
this.topwindow = null;
this.topindex = 0;
this.focus = 0;
const me = this;
const screen_element = jQuery("#screen");
screen_element.mousedown((e) => this.on_mousedown(e));
screen_element.mouseup((e) => this.on_mouseup(e));
screen_element.mousemove((e) => this.on_mousemove(e));
const div = document.querySelector("#screen");
function on_mousescroll(e) {
me.on_mousescroll(e);
return e.preventDefault();
}
if (Utilities.isEventSupported("wheel")) {
div.addEventListener("wheel", on_mousescroll, false);
}
else {
this.warn("browser does not support scroll wheel events");
}
}
send() {
this.debug("network", "sending a", arguments[0], "packet");
if (this.protocol) {
this.protocol.send.apply(this.protocol, arguments);
}
}
send_log(level, arguments_) {
if (this.remote_logging && this.server_remote_logging && this.connected) {
try {
const sargs = [];
for (const argument of arguments_) {
sargs.push(unescape(encodeURIComponent(String(argument))));
}
this.send([PACKET_TYPES.logging, level, sargs]);
} catch {
this.cerror("remote logging failed");
for (const index in arguments_) {
const argument = arguments_[index];
this.clog(" argument", index, typeof argument, ":", `'${argument}'`);
}
}
}
}
exc() {
//first argument is the exception:
const exception = arguments[0];
let arguments_ = [...arguments];
arguments_ = arguments_.splice(1);
if (arguments_.length > 0) {
this.cerror(arguments_);
}
if (exception.stack) {
try {
//logging.ERROR = 40
this.send_log(40, [exception.stack]);
} catch {
//we tried our best
}
}
}
error() {
//logging.ERROR = 40
this.send_log(40, arguments);
Reflect.apply(this.cerror, this, arguments);
}
cerror() {
Utilities.cerror.apply(Utilities, arguments);
}
warn() {
//logging.WARN = 30
this.send_log(30, arguments);
Reflect.apply(this.cwarn, this, arguments);
}
cwarn() {
Utilities.cwarn.apply(Utilities, arguments);
}
log() {
//logging.INFO = 20
this.send_log(20, arguments);
Reflect.apply(this.clog, this, arguments);
}
clog() {
Utilities.clog.apply(Utilities, arguments);
}
debug() {
const category = arguments[0];
const arguments_ = [...arguments];
if (this.debug_categories.includes(category)) {
if (category != "network") {
//logging.DEBUG = 10
this.send_log(10, arguments_);
}
Reflect.apply(this.cdebug, this, arguments);
}
}
cdebug() {
Utilities.cdebug.apply(Utilities, arguments);
}
init(ignore_blacklist) {
this.on_connection_progress("Initializing", "", 20);
this.init_audio(ignore_blacklist);
this.init_packet_handlers();
this.init_keyboard();
if (this.scale !== 1) {
this.container.style.width = `${100 * this.scale}%`;
this.container.style.height = `${100 * this.scale}%`;
this.container.style.transform = `scale(${1 / this.scale})`;
this.container.style.transformOrigin = "top left";
}
}
init_packet_handlers() {
// the client holds a list of packet handlers
this.packet_handlers = {
[PACKET_TYPES.ack_file_chunk]: this._process_ack_file_chunk,
[PACKET_TYPES.bell]: this._process_bell,
[PACKET_TYPES.challenge]: this._process_challenge,
[PACKET_TYPES.clipboard_request]: this._process_clipboard_request,
[PACKET_TYPES.clipboard_token]: this._process_clipboard_token,
[PACKET_TYPES.close]: this._process_close,
[PACKET_TYPES.configure_override_redirect]: this._process_configure_override_redirect,
[PACKET_TYPES.cursor]: this._process_cursor,
[PACKET_TYPES.desktop_size]: this._process_desktop_size,
[PACKET_TYPES.disconnect]: this._process_disconnect,
[PACKET_TYPES.draw]: this._process_draw,
[PACKET_TYPES.encodings]: this._process_encodings,
[PACKET_TYPES.eos]: this._process_eos,
[PACKET_TYPES.error]: this._process_error,
[PACKET_TYPES.hello]: this._process_hello,
[PACKET_TYPES.info_response]: this._process_info_response,
[PACKET_TYPES.initiate_moveresize]: this._process_initiate_moveresize,
[PACKET_TYPES.lost_window]: this._process_lost_window,
[PACKET_TYPES.new_override_redirect]: this._process_new_override_redirect,
[PACKET_TYPES.new_tray]: this._process_new_tray,
[PACKET_TYPES.new_window]: this._process_new_window,
[PACKET_TYPES.notify_close]: this._process_notify_close,
[PACKET_TYPES.notify_show]: this._process_notify_show,
[PACKET_TYPES.open]: this._process_open,
[PACKET_TYPES.open_url]: this._process_open_url,
[PACKET_TYPES.ping]: this._process_ping,
[PACKET_TYPES.ping_echo]: this._process_ping_echo,
[PACKET_TYPES.pointer_position]: this._process_pointer_position,
[PACKET_TYPES.raise_window]: this._process_raise_window,
[PACKET_TYPES.send_file]: this._process_send_file,
[PACKET_TYPES.send_file_chunk]: this._process_send_file_chunk,
[PACKET_TYPES.set_clipboard_enabled]: this._process_set_clipboard_enabled,
[PACKET_TYPES.setting_change]: this._process_setting_change,
[PACKET_TYPES.sound_data]: this._process_sound_data,
[PACKET_TYPES.startup_complete]: this._process_startup_complete,
[PACKET_TYPES.window_icon]: this._process_window_icon,
[PACKET_TYPES.window_metadata]: this._process_window_metadata,
[PACKET_TYPES.window_move_resize]: this._process_window_move_resize,
[PACKET_TYPES.window_resized]: this._process_window_resized,
};
}
on_connection_progress(state, details, progress) {
//can be overriden
this.clog(state, details);
}
callback_close(reason) {
if (reason === undefined) {
reason = "unknown reason";
}
this.clog(`connection closed: ${reason}`);
}
connect() {
let details = `${this.host}:${this.port}${this.path}`;
if (this.ssl) {
details += " with ssl";
}
this.schedule_hello_timer();
this.on_connection_progress("Connecting to server", details, 40);
// open the web socket, started it in a worker if available
// check we have enough information for encryption
if (this.encryption && (!this.encryption_key || this.encryption_key == "")) {
this.disconnect("no key specified for encryption");
return;
}
this.initialize_workers();
}
initialize_workers() {
const safe_encodings = [
"jpeg",
"png",
"png/P",
"png/L",
"rgb",
"rgb32",
"rgb24",
"scroll",
"void",
];
// detect websocket in webworker support and degrade gracefully
if (!window.Worker) {
// no webworker support
this.supported_encodings = safe_encodings;
this.offscreen_api = false;
this.decode_worker = false;
this.clog("no webworker support at all.");
this._do_connect(false);
return;
}
this.offscreen_api = DECODE_WORKER && XpraOffscreenWorker.isAvailable(this.ssl);
if (this.offscreen_api) {
this.set_encoding_option('video_max_size',[4096, 4096]);
}
this.clog("we have webworker support");
// spawn worker that checks for a websocket
const worker = new Worker("js/lib/wsworker_check.js");
worker.addEventListener(
"message",
(e) => {
const data = e.data;
switch (data["result"]) {
case true:
// yey, we can use websocket in worker!
this.clog("we can use websocket in webworker");
this._do_connect(true);
break;
case false:
this.clog("we can't use websocket in webworker, won't use webworkers");
this._do_connect(false);
break;
default:
this.clog("client got unknown message from worker");
this._do_connect(false);
}
},
false
);
// ask the worker to check for websocket support, when we receive a reply
// through the eventlistener above, _do_connect() will finish the job
worker.postMessage({ cmd: "check" });
if (!DECODE_WORKER) {
this.supported_encodings = safe_encodings;
this.decode_worker = false;
return;
}
let decode_worker;
if (this.offscreen_api) {
this.clog("using offscreen decode worker");
decode_worker = new Worker("js/OffscreenDecodeWorker.js");
} else {
this.clog("using decode worker");
decode_worker = new Worker("js/DecodeWorker.js");
}
decode_worker.addEventListener(
"message",
(e) => {
const data = e.data;
if (data["draw"]) {
this.do_process_draw(data["draw"], data["start"]);
return;
}
if (data["error"]) {
const message = data["error"];
const packet = data["packet"];
const wid = packet[1];
const width = packet[2];
const height = packet[3];
const coding = packet[6];
const packet_sequence = packet[8];
this.clog("decode error on ", coding, "packet sequence", packet_sequence, ":", message);
if (!this.offscreen_api) {
this.clog(" pixel data:", packet[7]);
}
this.do_send_damage_sequence(packet_sequence, wid, width, height, -1, message);
return;
}
switch (data["result"]) {
case true: {
const formats = [...data["formats"]];
this.clog("we can decode using a worker:", decode_worker);
this.supported_encodings = formats;
this.clog("full list of supported encodings:", this.supported_encodings);
this.decode_worker = decode_worker;
break;
}
case false:
this.clog(`we can't decode using a worker: ${data["errors"]}`);
this.decode_worker = false;
break;
default:
this.clog("client got unknown message from the decode worker");
this.decode_worker = false;
}
},
false
);
this.clog("decode worker will check:", this.check_encodings);
decode_worker.postMessage({
cmd: "check",
encodings: this.check_encodings,
});
}
_do_connect(with_worker) {
if (this.webtransport) {
this.protocol = new XpraWebTransportProtocol();
}
else {
const use_worker = with_worker && !XPRA_CLIENT_FORCE_NO_WORKER;
this.protocol = use_worker ? new XpraProtocolWorkerHost() : new XpraProtocol();
}
this.open_protocol();
}
open_protocol() {
// set protocol to deliver packets to our packet router
this.protocol.set_packet_handler((packet) => this._route_packet(packet));
// make uri
let uri = "";
if (this.webtransport) {
uri = "https";
}
else {
if (this.ssl) {
uri = "wss";
}
else {
uri = "ws";
}
}
uri += "://";
uri += this.host;
if (this.port) {
uri += `:${this.port}`;
}
uri += this.path;
// do open
this.uri = uri;
this.on_connection_progress("Opening WebSocket connection", uri, 50);
this.protocol.open(uri);
console.log("open_protocol() done");
}
request_refresh(wid) {
this.send([PACKET_TYPES.buffer_refresh, wid, 0, 100,
{
"refresh-now": true,
batch: { reset: true },
},
{}, //no client_properties
]);
}
redraw_windows() {
for (const wid in this.id_to_window) {
const win = this.id_to_window[wid];
this.request_redraw(win);
}
}
remove_windows() {
for (const wid in this.id_to_window) {
const win = this.id_to_window[wid];
window.removeWindowListItem(win.wid);
win.destroy();
}
}
send_close_window(win) {
this.send([PACKET_TYPES.close_window, win.wid]);
}
close_protocol() {
this.connected = false;
if (this.protocol) {
this.protocol.close();
this.protocol = null;
}
}
clear_timers() {
this.stop_info_timer();
this.cancel_hello_timer();
if (this.ping_timer) {
clearTimeout(this.ping_timer);
this.ping_timer = null;
}
if (this.ping_timeout_timer) {
clearTimeout(this.ping_timeout_timer);
this.ping_timeout_timer = null;
}
if (this.ping_grace_timer) {
clearTimeout(this.ping_grace_timer);
this.ping_grace_timer = null;
}
}
set_encoding(encoding) {
// add an encoding to our hello.encodings list
this.clog("encoding:", encoding);
this.encoding = encoding;
}
set_encoding_option(option, value) {
this.clog("encoding: ", option, "=", value);
this.encoding_options[option] = value;
}
_route_packet(packet) {
// ctx refers to `this` because we came through a callback
const packet_type = Utilities.s(packet[0]);
this.debug("network", "received a", packet_type, "packet");
const function_ = this.packet_handlers[packet_type];
if (function_ == undefined) {
this.cerror("no packet handler for ", packet_type);
this.clog(packet);
} else {
function_.call(this, packet);
}
}
_screen_resized(event) {
// send the desktop_size packet so server knows we changed size
if (!this.connected) {
return;
}
if (this.container.clientWidth == this.desktop_width && this.container.clientHeight == this.desktop_height) {
// unchanged
return;
}
this.desktop_width = this.container.clientWidth;
this.desktop_height = this.container.clientHeight;
const newsize = [this.desktop_width, this.desktop_height];
const packet = [PACKET_TYPES.desktop_size, newsize[0], newsize[1], this._get_screen_sizes()];
this.send(packet);
// call the screen_resized function on all open windows
for (const index in this.id_to_window) {
const win = this.id_to_window[index];
win.screen_resized();
// Force fullscreen on a a given window name from the provided settings
if (
default_settings !== undefined &&
default_settings.auto_fullscreen !== undefined &&
default_settings.auto_fullscreen.length > 0
) {
const pattern = new RegExp(`.*${default_settings.auto_fullscreen}.*`);
if (win.fullscreen === false && pattern.test(win.metadata.title)) {
clog(`auto fullscreen window: ${win.metadata.title}`);
win.set_fullscreen(true);
win.screen_resized();
}
}
// Make a DESKTOP-type window fullscreen automatically.
// This resizes things like xfdesktop according to the window size.
if (this.fullscreen === false && this.client.is_window_desktop(win)) {
clog(`auto fullscreen desktop window: ${this.metadata.title}`);
this.set_fullscreen(true);
this.screen_resized();
}
}
// Re-position floating toolbar menu
this.position_float_menu();
}
/**
* Keyboard
*/
init_keyboard() {
this.query_keyboard_map();
// modifier keys:
this.num_lock_modifier = null;
this.alt_modifier = null;
this.control_modifier = "control";
this.meta_modifier = null;
this.altgr_modifier = null;
this.altgr_state = false;
this.capture_keyboard = false;
// assign the key callbacks
document.addEventListener("keydown", (e) => {
const preview_element = $(WINDOW_PREVIEW_SELECTOR);
if (e.code === "Escape" && preview_element.is(":visible")) {
client.toggle_window_preview();
return e.stopPropagation() || e.preventDefault();
}
if (e.code === "Tab") {
if (preview_element.is(":visible")) {
// Select next for previous window.
const number_slides = $(".window-preview-item-container").length;
const current_slide = preview_element.slick("slickCurrentSlide");
let next_index = current_slide;
next_index = e.shiftKey
? (current_slide - 1) % number_slides
: (current_slide + 1) % number_slides;
preview_element.slick("goTo", next_index, true);
return e.stopPropagation() || e.preventDefault();
} else if (e.altKey) {
// Alt+Tab shows window preview. and goes to the next window.
client.toggle_window_preview((e, slick) => {
const number_slides = slick.slideCount;
const current_slide = slick.currentSlide;
const next_index = (current_slide + 1) % number_slides;
setTimeout(() => {
slick.goTo(next_index, true);
}, 10);
});
return e.stopPropagation() || e.preventDefault();
}
}
const r = this._keyb_onkeydown(e);
if (!r) {
e.preventDefault();
}
});
document.addEventListener("keyup", (e) => {
if (
(e.code === "Tab" || e.code.startsWith("Alt")) &&
$(WINDOW_PREVIEW_SELECTOR).is(":visible")
) {
if (e.code.startsWith("Alt")) {
client.toggle_window_preview();
}
return e.stopPropagation() || e.preventDefault();
}
const r = this._keyb_onkeyup(e);
if (!r) {
e.preventDefault();
}
});
}
query_keyboard_map() {
const keyboard = navigator.keyboard;
this.keyboard_map = {};
if (!navigator.keyboard) {
return;
}
keyboard.getLayoutMap().then((keyboardLayoutMap) => {
clog("got a keyboard layout map:", keyboardLayoutMap);
clog("keys:", [...keyboardLayoutMap.keys()]);
for (const key of keyboardLayoutMap.keys()) {
const value = keyboardLayoutMap[key];
cdebug("keyboard", key, "=", value);
this.keyboard_map[key] = value;
}
});
if (keyboard.addEventListener) {
keyboard.addEventListener("layoutchange", () =>
this.clog("keyboard layout has changed!")
);
}
}
_keyb_get_modifiers(event) {
/**
* Returns the modifiers set for the current event.
* We get the list of modifiers using "get_event_modifiers"
* then we translate them.
*/
//convert generic modifiers "meta" and "alt" into their x11 name:
const modifiers = get_event_modifiers(event);
return this.translate_modifiers(modifiers);
}
translate_modifiers(modifiers) {
/**
* We translate "alt" and "meta" into their keymap name.
* (usually "mod1")
* And also swap keys for macos clients.
*/
//convert generic modifiers "meta" and "alt" into their x11 name:
const alt = this.alt_modifier;
let control = this.control_modifier;
let meta = this.meta_modifier;
const altgr = this.altgr_modifier;
if (this.swap_keys) {
meta = this.control_modifier;
control = this.meta_modifier;
}
const new_modifiers = [...modifiers];
let index = modifiers.indexOf("meta");
if (index >= 0 && meta) new_modifiers[index] = meta;
index = modifiers.indexOf("control");
if (index >= 0 && control) new_modifiers[index] = control;
index = modifiers.indexOf("alt");
if (index >= 0 && alt) new_modifiers[index] = alt;
index = modifiers.indexOf("numlock");
if (index >= 0) {
if (this.num_lock_modifier) {
new_modifiers[index] = this.num_lock_modifier;
} else {
new_modifiers.splice(index, 1);
}
}
index = modifiers.indexOf("capslock");
if (index >= 0) {
new_modifiers[index] = "lock";
}
//add altgr?
if (this.altgr_state && altgr && !new_modifiers.includes(altgr)) {
new_modifiers.push(altgr);
//remove spurious modifiers:
index = new_modifiers.indexOf(alt);
if (index >= 0) new_modifiers.splice(index, 1);
index = new_modifiers.indexOf(control);
if (index >= 0) new_modifiers.splice(index, 1);
}
return new_modifiers;
}
_check_browser_language(key_layout) {
/**
* This function may send the new detected keyboard layout.
* (ignoring the keyboard_layout preference)
*/
const now = performance.now();
if (now < this.browser_language_change_embargo_time) {
return;
}
let new_layout;
if (key_layout) {
new_layout = key_layout;
} else {
//we may have used a different layout for a specific key,
//and now this new key doesn't need it anymore,
//so we may want to switch back to the original layout:
const l = Utilities.getFirstBrowserLanguage();
if (l && this.browser_language != l) {
//if the browser language has changed,
//this takes precedence over the configuration
this.clog("browser language changed from", this.browser_language, "to", l);
this.browser_language = l;
new_layout = Utilities.getKeyboardLayout();
} else {
//this will honour the setting supplied by the user on the connect page
//or default to Utilities.getKeyboardLayout()
new_layout = this._get_keyboard_layout() || "us";
}
}
if (new_layout != undefined && this.key_layout != new_layout) {
this.key_layout = new_layout;
this.clog("keyboard layout changed from", this.key_layout, "to", key_layout);
this.send([PACKET_TYPES.layout_changed, new_layout, ""]);
//changing the language too quickly can cause problems server side,
//wait a bit before checking again:
this.browser_language_change_embargo_time = now + 1000;
} else {
//check again after 100ms minimum
this.browser_language_change_embargo_time = now + 100;
}
}
_keyb_process(pressed, event) {
if (this.server_readonly) {
return true;
}
if (!this.capture_keyboard) {
return true;
}
/**
* Process a key event: key pressed or key released.
* Figure out the keycode, keyname, modifiers, etc
* And send the event to the server.
*/
let keyname = event.code || "";
const keycode = event.which || event.keyCode;
if (keycode == 229) {
//this usually fires when we have received the event via "oninput" already
return;
}
let keystring = event.key || String.fromCharCode(keycode);
let unpress_now = false;