Fix plotter issues

package.json

@@ -1,7 +1,8 @@
 {
   "name": "arduino-serial-plotter-webapp",
-  "version": "0.0.15",
-  "dependencies": {},
+  "version": "0.0.17",
+  "dependencies": {
+  },
   "license": "AGPL",
   "scripts": {
     "start": "react-scripts start",
@@ -32,6 +33,7 @@
     ]
   },
   "devDependencies": {
+    "@arduino/arc": "^0.9.1",
     "@testing-library/jest-dom": "^5.14.1",
     "@testing-library/react": "^11.2.7",
     "@testing-library/user-event": "^12.8.3",
@@ -52,6 +54,7 @@
     "node-sass": "^6.0.1",
     "prettier": "^2.4.1",
     "react": "^17.0.2",
+    "react-aria": "^3.0.0",
     "react-chartjs-2": "^3.3.0",
     "react-custom-scrollbars": "^4.2.1",
     "react-dom": "^17.0.2",

src/ChartPlotter.tsx

@@ -1,4 +1,10 @@
-import React, { useState, useRef, useImperativeHandle, useEffect } from "react";
+import React, {
+  useState,
+  useRef,
+  useImperativeHandle,
+  useEffect,
+  useCallback,
+} from "react";
 
 import { Line } from "react-chartjs-2";
 
@@ -11,10 +17,11 @@ import ChartStreaming from "chartjs-plugin-streaming";
 import { ChartJSOrUndefined } from "react-chartjs-2/dist/types";
 import { MessageToBoard } from "./MessageToBoard";
 
-Chart.register(ChartStreaming);
-
 // eslint-disable-next-line
 import Worker from "worker-loader!./msgAggregatorWorker";
+import { Snackbar } from "@arduino/arc";
+
+Chart.register(ChartStreaming);
 const worker = new Worker();
 
 function _Chart(
@@ -124,9 +131,21 @@ function _Chart(
     },
   });
 
+  const enableTooltips = useCallback(
+    (newState: boolean) => {
+      (opts.plugins as any).tooltip.enabled = newState;
+      opts.datasets!.line!.pointHoverRadius = newState ? 3 : 0;
+      setOpts(opts);
+      chartRef.current?.update();
+    },
+    [opts]
+  );
+
   useEffect(() => {
     if (!config.connected) {
       setConnected(false);
+      // when disconnected, force tooltips to be enabled
+      enableTooltips(true);
       return;
     }
 
@@ -135,8 +154,11 @@ function _Chart(
       // cleanup buffer state
       worker.postMessage({ command: "cleanup" });
       setConnected(true);
+
+      // restore the tooltips state (which match the pause state when connected)
+      enableTooltips(pause);
     }
-  }, [config.connected, connected]);
+  }, [config.connected, connected, pause, enableTooltips]);
 
   const togglePause = (newState: boolean) => {
     if (newState === pause) {
@@ -146,9 +168,8 @@ function _Chart(
       (chartRef.current as any).options.scales.x.realtime.pause = pause;
     }
     setPause(newState);
-    (opts.plugins as any).tooltip.enabled = newState;
-    opts.datasets!.line!.pointHoverRadius = newState ? 3 : 0;
-    setOpts(opts);
+    worker.postMessage({ command: "cleanup" });
+    enableTooltips(newState);
   };
 
   const setInterpolate = (interpolate: boolean) => {
@@ -221,6 +242,22 @@ function _Chart(
           <Line data={initialData} ref={chartRef as any} options={opts} />
         </div>
         <MessageToBoard config={config} wsSend={wsSend} />
+
+        {!connected && (
+          <Snackbar
+            anchorOrigin={{
+              horizontal: "center",
+              vertical: "bottom",
+            }}
+            autoHideDuration={7000}
+            className="snackbar"
+            closeable
+            isOpen
+            message="Board disconnected"
+            theme={config.darkTheme ? "dark" : "light"}
+            turnOffAutoHide
+          />
+        )}
       </div>
     </>
   );

src/fakeMessagsGenerators.ts

@@ -26,7 +26,7 @@ const genNamedVarValPair = (i: number) => {
 export const namedVariables = () => {
   const messages: string[] = [];
 
-  for (let i = 1; i <= 7; i++) {
+  for (let i = 1; i <= 9; i++) {
     let pair = genNamedVarValPair(i);
     messages.push(pair);
   }

src/index.scss

@@ -73,6 +73,13 @@ body {
   margin: 0;
 }
 
+.snackbar {
+  outline: none;
+  * {
+    outline: none;
+  }
+}
+
 .chart-container {
   display: flex;
   flex-direction: column;
@@ -216,6 +223,11 @@ body {
         }
       }
 
+      .pause-button {
+        width: 47px;
+        text-align: center;
+      }
+
       .clear-button {
         border: none;
         background: none;

src/msgAggregatorWorker.ts

@@ -8,6 +8,7 @@ ctx.addEventListener("message", (event) => {
 
   if (command === "cleanup") {
     buffer = "";
+    discardFirstLine = true;
   }
 
   if (data) {
@@ -16,6 +17,7 @@ ctx.addEventListener("message", (event) => {
 });
 
 let buffer = "";
+let discardFirstLine = true;
 const separator = "\r\n";
 var re = new RegExp(`(${separator})`, "g");
 
@@ -25,8 +27,26 @@ export const parseSerialMessages = (
   datasetNames: string[];
   parsedLines: { [key: string]: number }[];
 } => {
+  // when the serial is real fast, the first line can be incomplete and contain incomplete messages
+  // so we need to discard it and start aggregating from the first encountered separator
+  let joinMessages = messages.join("");
+  if (discardFirstLine) {
+    const firstSeparatorIndex = joinMessages.indexOf(separator);
+    if (firstSeparatorIndex > -1) {
+      joinMessages = joinMessages.substring(
+        firstSeparatorIndex + separator.length
+      );
+      discardFirstLine = false;
+    } else {
+      return {
+        datasetNames: [],
+        parsedLines: [],
+      };
+    }
+  }
+
   //add any leftover from the buffer to the first line
-  const messagesAndBuffer = (buffer + messages.join(""))
+  const messagesAndBuffer = ((buffer || "") + joinMessages)
     .split(re)
     .filter((message) => message.length > 0);
 

src/utils.ts

@@ -84,7 +84,10 @@ export const addDataPoints = (
     // add missing datasets to the chart
     existingDatasetNames.length < 8 &&
       datasetNames.forEach((datasetName) => {
-        if (!existingDatasetNames.includes(datasetName)) {
+        if (
+          !existingDatasetNames.includes(datasetName) &&
+          existingDatasetNames.length < 8
+        ) {
           const newDataset = {
             data: [],
             label: datasetName,