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[DO NOT MERGE] Remove usb visibilityChangeListener #40

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[DO NOT MERGE] Remove usb visibilityChangeListener #40

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aad3204
Remove usb visibilityChangeListener
microbit-grace Nov 8, 2024
d22d72f
Temporarily publish
microbit-grace Nov 8, 2024
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Remove usb visibilityChangeListener
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@microbit-grace
microbit-grace committed Nov 8, 2024
commit aad3204617a18547cbef6d7a11b66d0b59b80f81
64 changes: 5 additions & 59 deletions lib/usb.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -73,44 +73,12 @@ export class MicrobitWebUSBConnection
};

private flashing: boolean = false;
private disconnectAfterFlash: boolean = false;
private visibilityReconnect: boolean = false;
private visibilityChangeListener = () => {
if (document.visibilityState === "visible") {
if (
this.visibilityReconnect &&
this.status !== ConnectionStatus.CONNECTED
) {
this.disconnectAfterFlash = false;
this.visibilityReconnect = false;
if (!this.flashing) {
this.log("Reconnecting visible tab");
this.connect();
}
}
} else {
if (!this.unloading && this.status === ConnectionStatus.CONNECTED) {
if (!this.flashing) {
this.log("Disconnecting hidden tab");
this.disconnect().then(() => {
this.visibilityReconnect = true;
});
} else {
this.log("Scheduling disconnect of hidden tab for after flash");
this.disconnectAfterFlash = true;
}
}
}
};

private unloading = false;

private beforeUnloadListener = () => {
// If serial is in progress when the page unloads with V1 DAPLink 0254 or V2 0255
// then it'll fail to reconnect with mismatched command/response errors.
// Try hard to disconnect as a workaround.
// https://github.com/microbit-foundation/python-editor-v3/issues/89
this.unloading = true;
this.stopSerialInternal();
// The user might stay on the page if they have unsaved changes and there's another beforeunload listener.
window.addEventListener(
Expand All @@ -119,7 +87,6 @@ export class MicrobitWebUSBConnection
const assumePageIsStayingOpenDelay = 1000;
setTimeout(() => {
if (this.status === ConnectionStatus.CONNECTED) {
this.unloading = false;
if (this.addedListeners.serialdata) {
this.startSerialInternal();
}
Expand Down Expand Up @@ -153,12 +120,6 @@ export class MicrobitWebUSBConnection
}
if (typeof window !== "undefined") {
window.addEventListener("beforeunload", this.beforeUnloadListener);
if (window.document) {
window.document.addEventListener(
"visibilitychange",
this.visibilityChangeListener,
);
}
}
}

Expand All @@ -168,12 +129,6 @@ export class MicrobitWebUSBConnection
}
if (typeof window !== "undefined") {
window.removeEventListener("beforeunload", this.beforeUnloadListener);
if (window.document) {
window.document.removeEventListener(
"visibilitychange",
this.visibilityChangeListener,
);
}
}
}

Expand Down Expand Up @@ -260,19 +215,11 @@ export class MicrobitWebUSBConnection
}
} finally {
progress(undefined, wasPartial);

if (this.disconnectAfterFlash) {
this.log("Disconnecting after flash due to tab visibility");
this.disconnectAfterFlash = false;
await this.disconnect();
this.visibilityReconnect = true;
} else {
if (this.addedListeners.serialdata) {
this.log("Reinstating serial after flash");
if (this.connection.daplink) {
await this.connection.daplink.connect();
await this.startSerialInternal();
}
if (this.addedListeners.serialdata) {
this.log("Reinstating serial after flash");
if (this.connection.daplink) {
await this.connection.daplink.connect();
await this.startSerialInternal();
}
}
}
Expand Down Expand Up @@ -334,7 +281,6 @@ export class MicrobitWebUSBConnection

private setStatus(newStatus: ConnectionStatus) {
this.status = newStatus;
this.visibilityReconnect = false;
this.log("USB connection status " + newStatus);
this.dispatchTypedEvent("status", new ConnectionStatusEvent(newStatus));
}
Expand Down