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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 Mouse() {
var self = this;
/************************************************************************/
var __ws = null;
var __online = true;
var __current_pos = {x: 0, y:0};
var __sent_pos = {x: 0, y:0};
var __wheel_delta = {x: 0, y: 0};
var __stream_hovered = false;
var __init__ = function() {
$("hid-mouse-led").title = "Mouse free";
$("stream-box").onmouseenter = __hoverStream;
$("stream-box").onmouseleave = __leaveStream;
$("stream-box").onmousedown = (event) => __buttonHandler(event, true);
$("stream-box").onmouseup = (event) => __buttonHandler(event, false);
$("stream-box").oncontextmenu = (event) => event.preventDefault();
$("stream-box").onmousemove = __moveHandler;
$("stream-box").onwheel = __wheelHandler;
$("stream-box").ontouchstart = (event) => __touchMoveHandler(event);
tools.forEach($$$("[data-mouse-button]"), function(el_button) {
var button = el_button.getAttribute("data-mouse-button");
tools.setOnDown(el_button, () => __sendButton(button, true));
tools.setOnUp(el_button, () => __sendButton(button, false));
});
setInterval(__sendMove, 100);
};
/************************************************************************/
self.setSocket = function(ws) {
__ws = ws;
if (ws) {
$("stream-box").classList.add("stream-box-mouse-enabled");
} else {
$("stream-box").classList.remove("stream-box-mouse-enabled");
}
__updateLeds();
};
self.setState = function(state) {
__online = state.online;
__updateLeds();
};
var __hoverStream = function() {
__stream_hovered = true;
__updateLeds();
};
var __leaveStream = function() {
__stream_hovered = false;
__updateLeds();
};
var __updateLeds = function() {
var is_captured = (__stream_hovered || tools.browser.is_ios);
var led = "led-gray";
var title = "Mouse free";
if (__ws) {
if (__online) {
if (is_captured) {
led = "led-green";
title = "Mouse captured";
}
} else {
led = "led-yellow";
title = (is_captured ? "Mouse captured, HID offline" : "Mouse free, HID offline");
}
} else {
if (is_captured) {
title = "Mouse captured, Pi-KVM offline";
}
}
$("hid-mouse-led").className = led;
$("hid-mouse-led").title = title;
};
var __buttonHandler = function(event, state) {
// https://www.w3schools.com/jsref/event_button.asp
event.preventDefault();
switch (event.button) {
case 0: __sendButton("left", state); break;
case 2: __sendButton("right", state); break;
}
};
var __touchMoveHandler = function(event) {
event.preventDefault();
if (event.touches[0].target && event.touches[0].target.getBoundingClientRect) {
var rect = event.touches[0].target.getBoundingClientRect();
__current_pos = {
x: Math.round(event.touches[0].clientX - rect.left),
y: Math.round(event.touches[0].clientY - rect.top),
};
__sendMove();
}
};
var __moveHandler = function(event) {
var rect = event.target.getBoundingClientRect();
__current_pos = {
x: Math.round(event.clientX - rect.left),
y: Math.round(event.clientY - rect.top),
};
};
var __sendButton = function(button, state) {
tools.debug("Mouse: button", (state ? "pressed:" : "released:"), button);
__sendMove();
if (__ws) {
__ws.send(JSON.stringify({
event_type: "mouse_button",
button: button,
state: state,
}));
}
};
var __sendMove = function() {
var pos = __current_pos;
if (pos.x !== __sent_pos.x || pos.y !== __sent_pos.y) {
var el_stream_image = $("stream-image");
var to = {
x: __translate(pos.x, 0, el_stream_image.clientWidth, -32768, 32767),
y: __translate(pos.y, 0, el_stream_image.clientHeight, -32768, 32767),
};
tools.debug("Mouse: moved:", to);
if (__ws) {
__ws.send(JSON.stringify({
event_type: "mouse_move",
to: to,
}));
}
__sent_pos = pos;
}
};
var __translate = function(x, a, b, c, d) {
return Math.round((x - a) / (b - a) * (d - c) + c);
};
var __wheelHandler = function(event) {
// https://learn.javascript.ru/mousewheel
if (event.preventDefault) {
event.preventDefault();
}
var delta = {x: 0, y: 0};
__wheel_delta.y += event.deltaY;
if (Math.abs(__wheel_delta.y) >= 100) {
delta.y = __wheel_delta.y / Math.abs(__wheel_delta.y) * (-5);
__wheel_delta.y = 0;
}
if (delta.y) {
tools.debug("Mouse: scrolled:", delta);
if (__ws) {
__ws.send(JSON.stringify({
event_type: "mouse_wheel",
delta: delta,
}));
}
}
};
__init__();
}
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