Merge pull request #90 from ttsukagoshi/text-too-long

Update error message for cells with too much text

src/sheetsl.ts

@@ -290,9 +290,15 @@ export function translateRange(): void {
         if (cellValue === '') {
           return '';
         }
-        if (getBlobBytes(encodeURIComponent(cellValue)) > THRESHOLD_BYTES) {
+        const textBytes = getBlobBytes(encodeURIComponent(cellValue));
+        if (textBytes > THRESHOLD_BYTES) {
+          const cellValueString = cellValue.toString();
+          const truncatedCellValue = cellValueString.slice(
+            0,
+            Math.floor((cellValueString.length * THRESHOLD_BYTES) / textBytes)
+          );
           throw new Error(
-            `[${ADDON_NAME}] Cell content is too long. Please consider splitting the content into multiple cells:\n${cellValue}`
+            `[${ADDON_NAME}] Cell content length exceeds Google's limits. Please consider splitting the content into multiple cells. The following is the estimated maximum length of the cell in question:\n${truncatedCellValue}\n\nPlease note that this is a rough estimate and that the actual acceptable text length might differ slightly.`
           );
         } else {
           Utilities.sleep(1000); // Interval to avoid concentrated access to API