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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 Keypad(keys_parent, key_callback) {
var self = this;
/************************************************************************/
var __merged = {};
var __keys = {};
var __modifiers = {};
var __init__ = function() {
var code;
var el_key;
for (el_key of $$$(keys_parent + " div.key")) {
code = el_key.getAttribute("data-code");
tools.setDefault(__keys, code, []);
__keys[code].push(el_key);
tools.setDefault(__merged, code, []);
__merged[code].push(el_key);
(function(el_key) {
tools.setOnDown(el_key, () => __clickHandler(el_key, true));
tools.setOnUp(el_key, () => __clickHandler(el_key, false));
el_key.onmouseout = function() {
if (__isPressed(el_key)) {
__clickHandler(el_key, false);
}
};
})(el_key);
}
for (el_key of $$$(keys_parent + " div.modifier")) {
code = el_key.getAttribute("data-code");
tools.setDefault(__modifiers, code, []);
__modifiers[code].push(el_key);
tools.setDefault(__merged, code, []);
__merged[code].push(el_key);
(function(el_key) {
tools.setOnDown(el_key, () => __toggleModifierHandler(el_key));
})(el_key);
}
};
/************************************************************************/
self.releaseAll = function(release_hook=false) {
for (var dict of [__keys, __modifiers]) {
for (var code in dict) {
if (__isActive(dict[code][0])) {
self.emit(code, false, release_hook);
}
}
}
};
self.emit = function(code, state, release_hook=false) {
if (code in __merged) {
__commonHandler(__merged[code][0], state, false);
if (release_hook) {
for (code in __keys) {
if (__isActive(__keys[code][0])) {
self.emit(code, false);
}
}
}
__unholdModifiers();
}
};
var __clickHandler = function(el_key, state) {
__commonHandler(el_key, state, false);
__unholdModifiers();
};
var __toggleModifierHandler = function(el_key) {
__commonHandler(el_key, !__isActive(el_key), true);
};
var __commonHandler = function(el_key, state, hold) {
if (state && !__isActive(el_key)) {
__deactivate(el_key);
__activate(el_key, (hold ? "holded" : "pressed"));
__process(el_key, true);
} else {
__deactivate(el_key);
__process(el_key, false);
}
};
var __unholdModifiers = function() {
for (var code in __modifiers) {
var el_key = __modifiers[code][0];
if (__isHolded(el_key)) {
__deactivate(el_key);
__process(el_key, false);
}
}
};
var __isPressed = function(el_key) {
var is_pressed = false;
for (el_key of __resolveKeys(el_key)) {
is_pressed = (is_pressed || el_key.classList.contains("pressed"));
}
return is_pressed;
};
var __isHolded = function(el_key) {
var is_holded = false;
for (el_key of __resolveKeys(el_key)) {
is_holded = (is_holded || el_key.classList.contains("holded"));
}
return is_holded;
};
var __isActive = function(el_key) {
var is_active = false;
for (el_key of __resolveKeys(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) {
for (el_key of __resolveKeys(el_key)) {
el_key.classList.add(cls);
}
};
var __deactivate = function(el_key) {
for (el_key of __resolveKeys(el_key)) {
el_key.classList.remove("pressed");
el_key.classList.remove("holded");
}
};
var __resolveKeys = function(el_key) {
var code = el_key.getAttribute("data-code");
return __merged[code];
};
var __process = function(el_key, state) {
var code = el_key.getAttribute("data-code");
key_callback(code, state);
};
__init__();
}
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