iridium/neko-custom
Archived
2
0
Fork 0
Code Pull Requests Activity

upgrade guacamole keyboard, #174.

Browse Source
This commit is contained in:
Miroslav Šedivý 2022-06-01 22:28:09 +02:00
parent c48309b648
commit 676f36c973
1 changed files with 231 additions and 233 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

462
client/src/utils/guacamole-keyboard.js
View File

@ -1,4 +1,5 @@
/* eslint-disable */
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
@ -35,7 +36,9 @@ Guacamole.Keyboard = function Keyboard(element) {
/**
* Reference to this Guacamole.Keyboard.
*
* @private
* @type {!Guacamole.Keyboard}
*/
var guac_keyboard = this;
@ -44,7 +47,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* instance with respect to other Guacamole.Keyboard instances.
*
* @private
* @type {Number}
* @type {!number}
*/
var guacKeyboardID = Guacamole.Keyboard._nextID++;
@ -54,7 +57,7 @@ Guacamole.Keyboard = function Keyboard(element) {
*
* @private
* @constant
* @type {String}
* @type {!string}
*/
var EVENT_MARKER = '_GUAC_KEYBOARD_HANDLED_BY_' + guacKeyboardID;
@ -63,9 +66,12 @@ Guacamole.Keyboard = function Keyboard(element) {
* with this Guacamole.Keyboard in focus.
*
* @event
* @param {Number} keysym The keysym of the key being pressed.
* @return {Boolean} true if the key event should be allowed through to the
* browser, false otherwise.
* @param {!number} keysym
* The keysym of the key being pressed.
*
* @return {!boolean}
* true if the key event should be allowed through to the browser,
* false otherwise.
*/
this.onkeydown = null;
@ -74,7 +80,8 @@ Guacamole.Keyboard = function Keyboard(element) {
* with this Guacamole.Keyboard in focus.
*
* @event
* @param {Number} keysym The keysym of the key being released.
* @param {!number} keysym
* The keysym of the key being released.
*/
this.onkeyup = null;
@ -84,14 +91,14 @@ Guacamole.Keyboard = function Keyboard(element) {
* reliably detect that quirk is to platform/browser-sniff.
*
* @private
* @type {Object.<String, Boolean>}
* @type {!Object.<string, boolean>}
*/
var quirks = {
/**
* Whether keyup events are universally unreliable.
*
* @type {Boolean}
* @type {!boolean}
*/
keyupUnreliable: false,
@ -99,7 +106,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* Whether the Alt key is actually a modifier for typable keys and is
* thus never used for keyboard shortcuts.
*
* @type {Boolean}
* @type {!boolean}
*/
altIsTypableOnly: false,
@ -107,7 +114,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* Whether we can rely on receiving a keyup event for the Caps Lock
* key.
*
* @type {Boolean}
* @type {!boolean}
*/
capsLockKeyupUnreliable: false
@ -137,26 +144,75 @@ Guacamole.Keyboard = function Keyboard(element) {
*
* @private
* @constructor
* @param {KeyboardEvent} [orig]
* The relevant DOM keyboard event.
*/
var KeyEvent = function() {
var KeyEvent = function KeyEvent(orig) {
/**
* Reference to this key event.
*
* @private
* @type {!KeyEvent}
*/
var key_event = this;
/**
* The JavaScript key code of the key pressed. For most events (keydown
* and keyup), this is a scancode-like value related to the position of
* the key on the US English "Qwerty" keyboard. For keypress events,
* this is the Unicode codepoint of the character that would be typed
* by the key pressed.
*
* @type {!number}
*/
this.keyCode = orig ? (orig.which || orig.keyCode) : 0;
/**
* The legacy DOM3 "keyIdentifier" of the key pressed, as defined at:
* http://www.w3.org/TR/2009/WD-DOM-Level-3-Events-20090908/#events-Events-KeyboardEvent
*
* @type {!string}
*/
this.keyIdentifier = orig && orig.keyIdentifier;
/**
* The standard name of the key pressed, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*
* @type {!string}
*/
this.key = orig && orig.key;
/**
* The location on the keyboard corresponding to the key pressed, as
* defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*
* @type {!number}
*/
this.location = orig ? getEventLocation(orig) : 0;
/**
* The state of all local keyboard modifiers at the time this event was
* received.
*
* @type {!Guacamole.Keyboard.ModifierState}
*/
this.modifiers = orig ? Guacamole.Keyboard.ModifierState.fromKeyboardEvent(orig) : new Guacamole.Keyboard.ModifierState();
/**
* An arbitrary timestamp in milliseconds, indicating this event's
* position in time relative to other events.
*
* @type {Number}
* @type {!number}
*/
this.timestamp = new Date().getTime();
/**
* Whether the default action of this key event should be prevented.
*
* @type {Boolean}
* @type {!boolean}
*/
this.defaultPrevented = false;
@ -165,7 +221,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* by a best-effort guess using available event properties and keyboard
* state.
*
* @type {Number}
* @type {number}
*/
this.keysym = null;
@ -174,7 +230,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* If false, the keysym may still be valid, but it's only a best guess,
* and future key events may be a better source of information.
*
* @type {Boolean}
* @type {!boolean}
*/
this.reliable = false;
@ -182,8 +238,9 @@ Guacamole.Keyboard = function Keyboard(element) {
* Returns the number of milliseconds elapsed since this event was
* received.
*
* @return {Number} The number of milliseconds elapsed since this
* event was received.
* @return {!number}
* The number of milliseconds elapsed since this event was
* received.
*/
this.getAge = function() {
return new Date().getTime() - key_event.timestamp;
@ -199,62 +256,23 @@ Guacamole.Keyboard = function Keyboard(element) {
* @private
* @constructor
* @augments Guacamole.Keyboard.KeyEvent
* @param {Number} keyCode The JavaScript key code of the key pressed.
* @param {String} keyIdentifier The legacy DOM3 "keyIdentifier" of the key
* pressed, as defined at:
* http://www.w3.org/TR/2009/WD-DOM-Level-3-Events-20090908/#events-Events-KeyboardEvent
* @param {String} key The standard name of the key pressed, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
* @param {Number} location The location on the keyboard corresponding to
* the key pressed, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
* @param {!KeyboardEvent} orig
* The relevant DOM "keydown" event.
*/
var KeydownEvent = function(keyCode, keyIdentifier, key, location) {
var KeydownEvent = function KeydownEvent(orig) {
// We extend KeyEvent
KeyEvent.apply(this);
/**
* The JavaScript key code of the key pressed.
*
* @type {Number}
*/
this.keyCode = keyCode;
/**
* The legacy DOM3 "keyIdentifier" of the key pressed, as defined at:
* http://www.w3.org/TR/2009/WD-DOM-Level-3-Events-20090908/#events-Events-KeyboardEvent
*
* @type {String}
*/
this.keyIdentifier = keyIdentifier;
/**
* The standard name of the key pressed, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*
* @type {String}
*/
this.key = key;
/**
* The location on the keyboard corresponding to the key pressed, as
* defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*
* @type {Number}
*/
this.location = location;
KeyEvent.call(this, orig);
// If key is known from keyCode or DOM3 alone, use that
this.keysym = keysym_from_key_identifier(key, location)
|| keysym_from_keycode(keyCode, location);
this.keysym = keysym_from_key_identifier(this.key, this.location)
|| keysym_from_keycode(this.keyCode, this.location);
/**
* Whether the keyup following this keydown event is known to be
* reliable. If false, we cannot rely on the keyup event to occur.
*
* @type {Boolean}
* @type {!boolean}
*/
this.keyupReliable = !quirks.keyupUnreliable;
@ -264,12 +282,12 @@ Guacamole.Keyboard = function Keyboard(element) {
this.reliable = true;
// Use legacy keyIdentifier as a last resort, if it looks sane
if (!this.keysym && key_identifier_sane(keyCode, keyIdentifier))
this.keysym = keysym_from_key_identifier(keyIdentifier, location, guac_keyboard.modifiers.shift);
if (!this.keysym && key_identifier_sane(this.keyCode, this.keyIdentifier))
this.keysym = keysym_from_key_identifier(this.keyIdentifier, this.location, this.modifiers.shift);
// If a key is pressed while meta is held down, the keyup will
// never be sent in Chrome (bug #108404)
if (guac_keyboard.modifiers.meta && this.keysym !== 0xFFE7 && this.keysym !== 0xFFE8)
if (this.modifiers.meta && this.keysym !== 0xFFE7 && this.keysym !== 0xFFE8)
this.keyupReliable = false;
// We cannot rely on receiving keyup for Caps Lock on certain platforms
@ -277,21 +295,21 @@ Guacamole.Keyboard = function Keyboard(element) {
this.keyupReliable = false;
// Determine whether default action for Alt+combinations must be prevented
var prevent_alt = !guac_keyboard.modifiers.ctrl && !quirks.altIsTypableOnly;
var prevent_alt = !this.modifiers.ctrl && !quirks.altIsTypableOnly;
// Determine whether default action for Ctrl+combinations must be prevented
var prevent_ctrl = !guac_keyboard.modifiers.alt;
var prevent_ctrl = !this.modifiers.alt;
// We must rely on the (potentially buggy) keyIdentifier if preventing
// the default action is important
if ((prevent_ctrl && guac_keyboard.modifiers.ctrl)
|| (prevent_alt && guac_keyboard.modifiers.alt)
|| guac_keyboard.modifiers.meta
|| guac_keyboard.modifiers.hyper)
if ((prevent_ctrl && this.modifiers.ctrl)
|| (prevent_alt && this.modifiers.alt)
|| this.modifiers.meta
|| this.modifiers.hyper)
this.reliable = true;
// Record most recently known keysym by associated key code
recentKeysym[keyCode] = this.keysym;
recentKeysym[this.keyCode] = this.keysym;
};
@ -305,24 +323,16 @@ Guacamole.Keyboard = function Keyboard(element) {
* @private
* @constructor
* @augments Guacamole.Keyboard.KeyEvent
* @param {Number} charCode The Unicode codepoint of the character that
* would be typed by the key pressed.
* @param {!KeyboardEvent} orig
* The relevant DOM "keypress" event.
*/
var KeypressEvent = function(charCode) {
var KeypressEvent = function KeypressEvent(orig) {
// We extend KeyEvent
KeyEvent.apply(this);
/**
* The Unicode codepoint of the character that would be typed by the
* key pressed.
*
* @type {Number}
*/
this.charCode = charCode;
KeyEvent.call(this, orig);
// Pull keysym from char code
this.keysym = keysym_from_charcode(charCode);
this.keysym = keysym_from_charcode(this.keyCode);
// Keypress is always reliable
this.reliable = true;
@ -332,68 +342,30 @@ Guacamole.Keyboard = function Keyboard(element) {
KeypressEvent.prototype = new KeyEvent();
/**
* Information related to the pressing of a key, which need not be a key
* Information related to the releasing of a key, which need not be a key
* associated with a printable character. The presence or absence of any
* information within this object is browser-dependent.
*
* @private
* @constructor
* @augments Guacamole.Keyboard.KeyEvent
* @param {Number} keyCode The JavaScript key code of the key released.
* @param {String} keyIdentifier The legacy DOM3 "keyIdentifier" of the key
* released, as defined at:
* http://www.w3.org/TR/2009/WD-DOM-Level-3-Events-20090908/#events-Events-KeyboardEvent
* @param {String} key The standard name of the key released, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
* @param {Number} location The location on the keyboard corresponding to
* the key released, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
* @param {!KeyboardEvent} orig
* The relevant DOM "keyup" event.
*/
var KeyupEvent = function(keyCode, keyIdentifier, key, location) {
var KeyupEvent = function KeyupEvent(orig) {
// We extend KeyEvent
KeyEvent.apply(this);
KeyEvent.call(this, orig);
/**
* The JavaScript key code of the key released.
*
* @type {Number}
*/
this.keyCode = keyCode;
/**
* The legacy DOM3 "keyIdentifier" of the key released, as defined at:
* http://www.w3.org/TR/2009/WD-DOM-Level-3-Events-20090908/#events-Events-KeyboardEvent
*
* @type {String}
*/
this.keyIdentifier = keyIdentifier;
/**
* The standard name of the key released, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*
* @type {String}
*/
this.key = key;
/**
* The location on the keyboard corresponding to the key released, as
* defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*
* @type {Number}
*/
this.location = location;
// If key is known from keyCode or DOM3 alone, use that
this.keysym = keysym_from_keycode(keyCode, location)
|| keysym_from_key_identifier(key, location); // keyCode is still more reliable for keyup when dead keys are in use
// If key is known from keyCode or DOM3 alone, use that (keyCode is
// still more reliable for keyup when dead keys are in use)
this.keysym = keysym_from_keycode(this.keyCode, this.location)
|| keysym_from_key_identifier(this.key, this.location);
// Fall back to the most recently pressed keysym associated with the
// keyCode if the inferred key doesn't seem to actually be pressed
if (!guac_keyboard.pressed[this.keysym])
this.keysym = recentKeysym[keyCode] || this.keysym;
this.keysym = recentKeysym[this.keyCode] || this.keysym;
// Keyup is as reliable as it will ever be
this.reliable = true;
@ -407,14 +379,16 @@ Guacamole.Keyboard = function Keyboard(element) {
* KeydownEvent, KeypressEvent, and KeyupEvent classes.
*
* @private
* @type {KeyEvent[]}
* @type {!KeyEvent[]}
*/
var eventLog = [];
/**
* Map of known JavaScript keycodes which do not map to typable characters
* to their X11 keysym equivalents.
*
* @private
* @type {!Object.<number, number[]>}
*/
var keycodeKeysyms = {
8: [0xFF08], // backspace
@ -438,9 +412,9 @@ Guacamole.Keyboard = function Keyboard(element) {
40: [0xFF54, 0xFF54, 0xFF54, 0xFFB2], // down arrow / KP 2
45: [0xFF63, 0xFF63, 0xFF63, 0xFFB0], // insert / KP 0
46: [0xFFFF, 0xFFFF, 0xFFFF, 0xFFAE], // delete / KP decimal
91: [0xFFEB], // left window key (hyper_l)
92: [0xFF67], // right window key (menu key?)
93: null, // select key
91: [0xFFE7], // left windows/command key (meta_l)
92: [0xFFE8], // right window/command key (meta_r)
93: [0xFF67], // menu key
96: [0xFFB0], // KP 0
97: [0xFFB1], // KP 1
98: [0xFFB2], // KP 2
@ -476,7 +450,9 @@ Guacamole.Keyboard = function Keyboard(element) {
/**
* Map of known JavaScript keyidentifiers which do not map to typable
* characters to their unshifted X11 keysym equivalents.
*
* @private
* @type {!Object.<string, number[]>}
*/
var keyidentifier_keysym = {
"Again": [0xFF66],
@ -584,14 +560,16 @@ Guacamole.Keyboard = function Keyboard(element) {
"UIKeyInputUpArrow": [0xFF52],
"Up": [0xFF52],
"Undo": [0xFF65],
"Win": [0xFFEB],
"Win": [0xFFE7, 0xFFE7, 0xFFE8],
"Zenkaku": [0xFF28],
"ZenkakuHankaku": [0xFF2A]
};
/**
* All keysyms which should not repeat when held down.
*
* @private
* @type {!Object.<number, boolean>}
*/
var no_repeat = {
0xFE03: true, // ISO Level 3 Shift (AltGr)
@ -604,12 +582,14 @@ Guacamole.Keyboard = function Keyboard(element) {
0xFFE8: true, // Right meta
0xFFE9: true, // Left alt
0xFFEA: true, // Right alt
0xFFEB: true, // Left hyper
0xFFEC: true // Right hyper
0xFFEB: true, // Left super/hyper
0xFFEC: true // Right super/hyper
};
/**
* All modifiers and their states.
*
* @type {!Guacamole.Keyboard.ModifierState}
*/
this.modifiers = new Guacamole.Keyboard.ModifierState();
@ -617,6 +597,8 @@ Guacamole.Keyboard = function Keyboard(element) {
* The state of every key, indexed by keysym. If a particular key is
* pressed, the value of pressed for that keysym will be true. If a key
* is not currently pressed, it will not be defined.
*
* @type {!Object.<number, boolean>}
*/
this.pressed = {};
@ -629,7 +611,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* of the key is explicitly known), it will not be defined.
*
* @private
* @tyle {Object.<Number, Boolean>}
* @type {!Object.<number, boolean>}
*/
var implicitlyPressed = {};
@ -640,6 +622,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* is (theoretically) still pressed.
*
* @private
* @type {!Object.<number, boolean>}
*/
var last_keydown_result = {};
@ -648,20 +631,24 @@ Guacamole.Keyboard = function Keyboard(element) {
* fired. This object maps keycodes to keysyms.
*
* @private
* @type {Object.<Number, Number>}
* @type {!Object.<number, number>}
*/
var recentKeysym = {};
/**
* Timeout before key repeat starts.
*
* @private
* @type {number}
*/
var key_repeat_timeout = null;
/**
* Interval which presses and releases the last key pressed while that
* key is still being held down.
*
* @private
* @type {number}
*/
var key_repeat_interval = null;
@ -671,11 +658,11 @@ Guacamole.Keyboard = function Keyboard(element) {
* undefined.
*
* @private
* @param {Number[]} keysyms
* @param {number[]} keysyms
* An array of keysyms, where the index of the keysym in the array is
* the location value.
*
* @param {Number} location
* @param {!number} location
* The location on the keyboard corresponding to the key pressed, as
* defined at: http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*/
@ -691,10 +678,10 @@ Guacamole.Keyboard = function Keyboard(element) {
* Returns true if the given keysym corresponds to a printable character,
* false otherwise.
*
* @param {Number} keysym
* @param {!number} keysym
* The keysym to check.
*
* @returns {Boolean}
* @returns {!boolean}
* true if the given keysym corresponds to a printable character,
* false otherwise.
*/
@ -773,13 +760,13 @@ Guacamole.Keyboard = function Keyboard(element) {
* correct in all cases.
*
* @private
* @param {Number} keyCode
* @param {!number} keyCode
* The keyCode from a browser keydown/keyup event.
*
* @param {String} keyIdentifier
* @param {string} keyIdentifier
* The legacy keyIdentifier from a browser keydown/keyup event.
*
* @returns {Boolean}
* @returns {!boolean}
* true if the keyIdentifier looks sane, false if the keyIdentifier
* appears incorrectly derived or is missing entirely.
*/
@ -816,8 +803,11 @@ Guacamole.Keyboard = function Keyboard(element) {
* not a modifier. The return value of this function depends on the
* return value of the keydown event handler, if any.
*
* @param {Number} keysym The keysym of the key to press.
* @return {Boolean} true if event should NOT be canceled, false otherwise.
* @param {number} keysym
* The keysym of the key to press.
*
* @return {boolean}
* true if event should NOT be canceled, false otherwise.
*/
this.press = function(keysym) {
@ -860,7 +850,8 @@ Guacamole.Keyboard = function Keyboard(element) {
/**
* Marks a key as released, firing the keyup event if registered.
*
* @param {Number} keysym The keysym of the key to release.
* @param {number} keysym
* The keysym of the key to release.
*/
this.release = function(keysym) {
@ -887,7 +878,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* Presses and releases the keys necessary to type the given string of
* text.
*
* @param {String} str
* @param {!string} str
* The string to type.
*/
this.type = function type(str) {
@ -923,27 +914,28 @@ Guacamole.Keyboard = function Keyboard(element) {
};
/**
* Given the remote and local state of a particular key, resynchronizes the
* remote state of that key with the local state through pressing or
* Resynchronizes the remote state of the given modifier with its
* corresponding local modifier state, as dictated by
* {@link KeyEvent#modifiers} within the given key event, by pressing or
* releasing keysyms.
*
* @private
* @param {Boolean} remoteState
* Whether the key is currently pressed remotely.
* @param {!string} modifier
* The name of the {@link Guacamole.Keyboard.ModifierState} property
* being updated.
*
* @param {Boolean} localState
* Whether the key is currently pressed remotely locally. If the state
* of the key is not known, this may be undefined.
* @param {!number[]} keysyms
* The keysyms which represent the modifier being updated.
*
* @param {Number[]} keysyms
* The keysyms which represent the key being updated.
*
* @param {KeyEvent} keyEvent
* @param {!KeyEvent} keyEvent
* Guacamole's current best interpretation of the key event being
* processed.
*/
var updateModifierState = function updateModifierState(remoteState,
localState, keysyms, keyEvent) {
var updateModifierState = function updateModifierState(modifier,
keysyms, keyEvent) {
var localState = keyEvent.modifiers[modifier];
var remoteState = guac_keyboard.modifiers[modifier];
var i;
@ -988,56 +980,50 @@ Guacamole.Keyboard = function Keyboard(element) {
};
/**
* Given a keyboard event, updates the local modifier state and remote
* key state based on the modifier flags within the event. This function
* pays no attention to keycodes.
* Given a keyboard event, updates the remote key state to match the local
* modifier state and remote based on the modifier flags within the event.
* This function pays no attention to keycodes.
*
* @private
* @param {KeyboardEvent} e
* The keyboard event containing the flags to update.
*
* @param {KeyEvent} keyEvent
* @param {!KeyEvent} keyEvent
* Guacamole's current best interpretation of the key event being
* processed.
*/
var syncModifierStates = function syncModifierStates(e, keyEvent) {
// Get state
var state = Guacamole.Keyboard.ModifierState.fromKeyboardEvent(e);
var syncModifierStates = function syncModifierStates(keyEvent) {
// Resync state of alt
updateModifierState(guac_keyboard.modifiers.alt, state.alt, [
updateModifierState('alt', [
0xFFE9, // Left alt
0xFFEA, // Right alt
0xFE03 // AltGr
], keyEvent);
// Resync state of shift
updateModifierState(guac_keyboard.modifiers.shift, state.shift, [
updateModifierState('shift', [
0xFFE1, // Left shift
0xFFE2 // Right shift
], keyEvent);
// Resync state of ctrl
updateModifierState(guac_keyboard.modifiers.ctrl, state.ctrl, [
updateModifierState('ctrl', [
0xFFE3, // Left ctrl
0xFFE4 // Right ctrl
], keyEvent);
// Resync state of meta
updateModifierState(guac_keyboard.modifiers.meta, state.meta, [
updateModifierState('meta', [
0xFFE7, // Left meta
0xFFE8 // Right meta
], keyEvent);
// Resync state of hyper
updateModifierState(guac_keyboard.modifiers.hyper, state.hyper, [
0xFFEB, // Left hyper
0xFFEC // Right hyper
updateModifierState('hyper', [
0xFFEB, // Left super/hyper
0xFFEC // Right super/hyper
], keyEvent);
// Update state
guac_keyboard.modifiers = state;
guac_keyboard.modifiers = keyEvent.modifiers;
};
@ -1047,7 +1033,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* inspection of other key events.
*
* @private
* @returns {Boolean}
* @returns {!boolean}
* true if all currently pressed keys were implicitly pressed, false
* otherwise.
*/
@ -1068,8 +1054,8 @@ Guacamole.Keyboard = function Keyboard(element) {
* can be).
*
* @private
* @return {Boolean} Whether the default action of the latest event should
* be prevented.
* @return {boolean}
* Whether the default action of the latest event should be prevented.
*/
function interpret_events() {
@ -1099,7 +1085,8 @@ Guacamole.Keyboard = function Keyboard(element) {
* looks like a key that may require AltGr.
*
* @private
* @param {Number} keysym The key that was just pressed.
* @param {!number} keysym
* The key that was just pressed.
*/
var release_simulated_altgr = function release_simulated_altgr(keysym) {
@ -1149,6 +1136,29 @@ Guacamole.Keyboard = function Keyboard(element) {
var keysym = null;
var accepted_events = [];
// Defer handling of Meta until it is known to be functioning as a
// modifier (it may otherwise actually be an alternative method for
// pressing a single key, such as Meta+Left for Home on ChromeOS)
if (first.keysym === 0xFFE7 || first.keysym === 0xFFE8) {
// Defer handling until further events exist to provide context
if (eventLog.length === 1)
return null;
// Drop keydown if it turns out Meta does not actually apply
if (eventLog[1].keysym !== first.keysym) {
if (!eventLog[1].modifiers.meta)
return eventLog.shift();
}
// Drop duplicate keydown events while waiting to determine
// whether to acknowledge Meta (browser may repeat keydown
// while the key is held)
else if (eventLog[1] instanceof KeydownEvent)
return eventLog.shift();
}
// If event itself is reliable, no need to wait for other events
if (first.reliable) {
keysym = first.keysym;
@ -1172,6 +1182,8 @@ Guacamole.Keyboard = function Keyboard(element) {
// Fire a key press if valid events were found
if (accepted_events.length > 0) {
syncModifierStates(first);
if (keysym) {
// Fire event
@ -1213,6 +1225,7 @@ Guacamole.Keyboard = function Keyboard(element) {
return first;
}
syncModifierStates(first);
return eventLog.shift();
} // end if keyup
@ -1233,11 +1246,11 @@ Guacamole.Keyboard = function Keyboard(element) {
* have the same keycode, such as left shift vs. right shift.
*
* @private
* @param {KeyboardEvent} e
* @param {!KeyboardEvent} e
* A JavaScript keyboard event, as received through the DOM via a
* "keydown", "keyup", or "keypress" handler.
*
* @returns {Number}
* @returns {!number}
* The location of the key event on the keyboard, as defined at:
* http://www.w3.org/TR/DOM-Level-3-Events/#events-KeyboardEvent
*/
@ -1261,10 +1274,10 @@ Guacamole.Keyboard = function Keyboard(element) {
* Guacamole.Keyboard. If the Event has already been marked as handled,
* false is returned.
*
* @param {Event} e
* @param {!Event} e
* The Event to mark.
*
* @returns {Boolean}
* @returns {!boolean}
* true if the given Event was successfully marked, false if the given
* Event was already marked.
*/
@ -1286,7 +1299,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* events signalled through this Guacamole.Keyboard's onkeydown and
* onkeyup handlers.
*
* @param {Element|Document} element
* @param {!(Element|Document)} element
* The Element to attach event listeners to for the sake of handling
* key or input events.
*/
@ -1301,17 +1314,11 @@ Guacamole.Keyboard = function Keyboard(element) {
// Ignore events which have already been handled
if (!markEvent(e)) return;
var keyCode;
if (window.event) keyCode = window.event.keyCode;
else if (e.which) keyCode = e.which;
// Fix modifier states
var keydownEvent = new KeydownEvent(keyCode, e.keyIdentifier, e.key, getEventLocation(e));
syncModifierStates(e, keydownEvent);
var keydownEvent = new KeydownEvent(e);
// Ignore (but do not prevent) the "composition" keycode sent by some
// browsers when an IME is in use (see: http://lists.w3.org/Archives/Public/www-dom/2010JulSep/att-0182/keyCode-spec.html)
if (keyCode === 229)
if (keydownEvent.keyCode === 229)
return;
// Log event
@ -1332,16 +1339,8 @@ Guacamole.Keyboard = function Keyboard(element) {
// Ignore events which have already been handled
if (!markEvent(e)) return;
var charCode;
if (window.event) charCode = window.event.keyCode;
else if (e.which) charCode = e.which;
// Fix modifier states
var keypressEvent = new KeypressEvent(charCode);
syncModifierStates(e, keypressEvent);
// Log event
eventLog.push(keypressEvent);
eventLog.push(new KeypressEvent(e));
// Interpret as many events as possible, prevent default if indicated
if (interpret_events())
@ -1360,16 +1359,8 @@ Guacamole.Keyboard = function Keyboard(element) {
e.preventDefault();
var keyCode;
if (window.event) keyCode = window.event.keyCode;
else if (e.which) keyCode = e.which;
// Fix modifier states
var keyupEvent = new KeyupEvent(keyCode, e.keyIdentifier, e.key, getEventLocation(e));
syncModifierStates(e, keyupEvent);
// Log event, call for interpretation
eventLog.push(keyupEvent);
eventLog.push(new KeyupEvent(e));
interpret_events();
}, true);
@ -1380,7 +1371,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* events is suspended, as such events may conflict with input events.
*
* @private
* @param {InputEvent} e
* @param {!InputEvent} e
* The "input" event to handle.
*/
var handleInput = function handleInput(e) {
@ -1406,7 +1397,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* with composition events.
*
* @private
* @param {CompositionEvent} e
* @param {!CompositionEvent} e
* The "compositionend" event to handle.
*/
var handleComposition = function handleComposition(e) {
@ -1442,7 +1433,7 @@ Guacamole.Keyboard = function Keyboard(element) {
* instance.
*
* @private
* @type {Number}
* @type {!number}
*/
Guacamole.Keyboard._nextID = 0;
@ -1454,31 +1445,36 @@ Guacamole.Keyboard.ModifierState = function() {
/**
* Whether shift is currently pressed.
* @type {Boolean}
*
* @type {!boolean}
*/
this.shift = false;
/**
* Whether ctrl is currently pressed.
* @type {Boolean}
*
* @type {!boolean}
*/
this.ctrl = false;
/**
* Whether alt is currently pressed.
* @type {Boolean}
*
* @type {!boolean}
*/
this.alt = false;
/**
* Whether meta (apple key) is currently pressed.
* @type {Boolean}
*
* @type {!boolean}
*/
this.meta = false;
/**
* Whether hyper (windows key) is currently pressed.
* @type {Boolean}
*
* @type {!boolean}
*/
this.hyper = false;
@ -1487,9 +1483,11 @@ Guacamole.Keyboard.ModifierState = function() {
/**
* Returns the modifier state applicable to the keyboard event given.
*
* @param {KeyboardEvent} e The keyboard event to read.
* @returns {Guacamole.Keyboard.ModifierState} The current state of keyboard
* modifiers.
* @param {!KeyboardEvent} e
* The keyboard event to read.
*
* @returns {!Guacamole.Keyboard.ModifierState}
* The current state of keyboard modifiers.
*/
Guacamole.Keyboard.ModifierState.fromKeyboardEvent = function(e) {