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Move wheel event handling to RFB class

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The Mouse class does very little now so it mostly just obfuscate things.
Move everything directly in to the RFB class instead.
This commit is contained in:
Pierre Ossman
2020-06-10 13:59:10 +02:00
committed by Samuel Mannehed
parent 4a87038080
commit f84bc57bda
4 changed files with 221 additions and 209 deletions
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core/input/mouse.js
-70
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@@ -7,22 +7,16 @@
import * as Log from '../util/logging.js';
import { setCapture, stopEvent, getPointerEvent } from '../util/events.js';
const WHEEL_STEP = 10; // Delta threshold for a mouse wheel step
const WHEEL_LINE_HEIGHT = 19;
export default class Mouse {
constructor(target) {
this._target = target || document;
this._pos = null;
this._accumulatedWheelDeltaX = 0;
this._accumulatedWheelDeltaY = 0;
this._eventHandlers = {
'mousedown': this._handleMouseDown.bind(this),
'mouseup': this._handleMouseUp.bind(this),
'mousemove': this._handleMouseMove.bind(this),
'mousewheel': this._handleMouseWheel.bind(this),
'mousedisable': this._handleMouseDisable.bind(this)
};
@@ -61,68 +55,6 @@ export default class Mouse {
this._handleMouseButton(e, 0);
}
// Mouse wheel events are sent in steps over VNC. This means that the VNC
// protocol can't handle a wheel event with specific distance or speed.
// Therefor, if we get a lot of small mouse wheel events we combine them.
_generateWheelStepX() {
if (this._accumulatedWheelDeltaX < 0) {
this.onmousebutton(this._pos.x, this._pos.y, 1, 1 << 5);
this.onmousebutton(this._pos.x, this._pos.y, 0, 1 << 5);
} else if (this._accumulatedWheelDeltaX > 0) {
this.onmousebutton(this._pos.x, this._pos.y, 1, 1 << 6);
this.onmousebutton(this._pos.x, this._pos.y, 0, 1 << 6);
}
this._accumulatedWheelDeltaX = 0;
}
_generateWheelStepY() {
if (this._accumulatedWheelDeltaY < 0) {
this.onmousebutton(this._pos.x, this._pos.y, 1, 1 << 3);
this.onmousebutton(this._pos.x, this._pos.y, 0, 1 << 3);
} else if (this._accumulatedWheelDeltaY > 0) {
this.onmousebutton(this._pos.x, this._pos.y, 1, 1 << 4);
this.onmousebutton(this._pos.x, this._pos.y, 0, 1 << 4);
}
this._accumulatedWheelDeltaY = 0;
}
_handleMouseWheel(e) {
this._updateMousePosition(e);
let dX = e.deltaX;
let dY = e.deltaY;
// Pixel units unless it's non-zero.
// Note that if deltamode is line or page won't matter since we aren't
// sending the mouse wheel delta to the server anyway.
// The difference between pixel and line can be important however since
// we have a threshold that can be smaller than the line height.
if (e.deltaMode !== 0) {
dX *= WHEEL_LINE_HEIGHT;
dY *= WHEEL_LINE_HEIGHT;
}
this._accumulatedWheelDeltaX += dX;
this._accumulatedWheelDeltaY += dY;
// Generate a mouse wheel step event when the accumulated delta
// for one of the axes is large enough.
// Small delta events that do not pass the threshold get sent
// after a timeout.
if (Math.abs(this._accumulatedWheelDeltaX) > WHEEL_STEP) {
this._generateWheelStepX();
}
if (Math.abs(this._accumulatedWheelDeltaY) > WHEEL_STEP) {
this._generateWheelStepY();
}
stopEvent(e);
}
_handleMouseMove(e) {
this._updateMousePosition(e);
this.onmousemove(this._pos.x, this._pos.y);
@@ -172,7 +104,6 @@ export default class Mouse {
t.addEventListener('mousedown', this._eventHandlers.mousedown);
t.addEventListener('mouseup', this._eventHandlers.mouseup);
t.addEventListener('mousemove', this._eventHandlers.mousemove);
t.addEventListener('wheel', this._eventHandlers.mousewheel);
// Prevent middle-click pasting (see above for why we bind to document)
document.addEventListener('click', this._eventHandlers.mousedisable);
@@ -188,7 +119,6 @@ export default class Mouse {
t.removeEventListener('mousedown', this._eventHandlers.mousedown);
t.removeEventListener('mouseup', this._eventHandlers.mouseup);
t.removeEventListener('mousemove', this._eventHandlers.mousemove);
t.removeEventListener('wheel', this._eventHandlers.mousewheel);
document.removeEventListener('click', this._eventHandlers.mousedisable);