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/*****************************************************************************
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
*****************************************************************************/
function Keyboard() {
var self = this;
/************************************************************************/
var __ws = null;
var __online = true;
var __keys = [].slice.call($$$("div#keyboard-desktop div.keyboard-block div.keyboard-row div.key"));
var __modifiers = [].slice.call($$$("div#keyboard-desktop div.keyboard-block div.keyboard-row div.modifier"));
var __init__ = function() {
$("hid-keyboard-led").title = "Keyboard free";
$("keyboard-window").onkeydown = (event) => __keyboardHandler(event, true);
$("keyboard-window").onkeyup = (event) => __keyboardHandler(event, false);
$("keyboard-window").onfocus = __updateLeds;
$("keyboard-window").onblur = __updateLeds;
$("stream-window").onkeydown = (event) => __keyboardHandler(event, true);
$("stream-window").onkeyup = (event) => __keyboardHandler(event, false);
$("stream-window").onfocus = __updateLeds;
$("stream-window").onblur = __updateLeds;
window.addEventListener("focusin", __updateLeds);
window.addEventListener("focusout", __updateLeds);
tools.forEach($$("key"), function(el_key) {
tools.setOnDown(el_key, () => __clickHandler(el_key, true));
tools.setOnUp(el_key, () => __clickHandler(el_key, false));
el_key.onmouseout = function() {
if (__isPressed(el_key)) {
__clickHandler(el_key, false);
}
};
});
tools.forEach($$("modifier"), function(el_key) {
tools.setOnDown(el_key, () => __toggleModifierHandler(el_key));
});
if (tools.browser.is_mac) {
tools.info("Keyboard: enabled Mac-CMD-Hook");
}
};
/************************************************************************/
self.setSocket = function(ws) {
if (ws !== __ws) {
self.releaseAll();
__ws = ws;
}
__updateLeds();
};
self.setState = function(state) {
__online = state.online;
__updateLeds();
};
self.releaseAll = function() {
__keys.concat(__modifiers).forEach(function(el_key) {
if (__isActive(el_key)) {
self.fireEvent(el_key.getAttribute("data-key"), false);
}
});
};
self.fireEvent = function(code, state) {
__keyboardHandler({code: code}, state);
};
var __updateLeds = function() {
var is_captured = (
$("stream-window").classList.contains("window-active")
|| $("keyboard-window").classList.contains("window-active")
);
var led = "led-gray";
var title = "Keyboard free";
if (__ws) {
if (__online) {
if (is_captured) {
led = "led-green";
title = "Keyboard captured";
}
} else {
led = "led-yellow";
title = (is_captured ? "Keyboard captured, HID offline" : "Keyboard free, HID offline");
}
} else {
if (is_captured) {
title = "Keyboard captured, Pi-KVM offline";
}
}
$("hid-keyboard-led").className = led;
$("hid-keyboard-led").title = title;
};
var __keyboardHandler = function(event, state) {
if (event.preventDefault) {
event.preventDefault();
}
var el_key = document.querySelector(`[data-key='${event.code}']`);
if (el_key && !event.repeat) {
__commonHandler(el_key, state, "pressed");
if (tools.browser.is_mac) {
// https://bugs.chromium.org/p/chromium/issues/detail?id=28089
// https://bugzilla.mozilla.org/show_bug.cgi?id=1299553
if ((event.code === "MetaLeft" || event.code === "MetaRight") && !state) {
__keys.forEach(function(el_key) {
if (__isActive(el_key)) {
self.fireEvent(el_key.getAttribute("data-key"), false);
}
});
}
}
__unholdModifiers();
}
};
var __clickHandler = function(el_key, state) {
__commonHandler(el_key, state, "pressed");
__unholdModifiers();
};
var __toggleModifierHandler = function(el_key) {
__commonHandler(el_key, !__isActive(el_key), "holded");
};
var __unholdModifiers = function() {
__modifiers.forEach(function(el_key) {
if (__isHolded(el_key)) {
__deactivate(el_key);
__sendKey(el_key, false);
}
});
};
var __commonHandler = function(el_key, state, cls) {
if (state && !__isActive(el_key)) {
__deactivate(el_key);
__activate(el_key, cls);
__sendKey(el_key, true);
} else {
__deactivate(el_key);
__sendKey(el_key, false);
}
};
var __isPressed = function(el_key) {
var is_pressed = false;
tools.forEach(__resolveKeys(el_key), function(el_key) {
is_pressed = (is_pressed || el_key.classList.contains("pressed"));
});
return is_pressed;
};
var __isHolded = function(el_key) {
var is_holded = false;
tools.forEach(__resolveKeys(el_key), function(el_key) {
is_holded = (is_holded || el_key.classList.contains("holded"));
});
return is_holded;
};
var __isActive = function(el_key) {
var is_active = false;
tools.forEach(__resolveKeys(el_key), function(el_key) {
is_active = (is_active || el_key.classList.contains("pressed") || el_key.classList.contains("holded"));
});
return is_active;
};
var __activate = function(el_key, cls) {
tools.forEach(__resolveKeys(el_key), function(el_key) {
el_key.classList.add(cls);
});
};
var __deactivate = function(el_key) {
tools.forEach(__resolveKeys(el_key), function(el_key) {
el_key.classList.remove("pressed");
el_key.classList.remove("holded");
});
};
var __resolveKeys = function(el_key) {
var code = el_key.getAttribute("data-key");
return $$$(`[data-key='${code}']`);
};
var __sendKey = function(el_key, state) {
var code = el_key.getAttribute("data-key");
tools.debug("Keyboard: key", (state ? "pressed:" : "released:"), code);
if (__ws) {
__ws.send(JSON.stringify({
event_type: "key",
key: code,
state: state,
}));
}
};
__init__();
}
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