react-virtualized#CellMeasurerCache TypeScript Examples

public _cache = new CellMeasurerCache({
    fixedWidth: true,
    defaultHeight: 44,
  });

LogList: React.FC<LogProps> = ({ logdata, fixedHeight, onScroll, downloadUrl, setFullscreen }) => {
  const { timezone } = useContext(TimezoneContext);
  const { t } = useTranslation();
  const rows = logdata.logs;
  const [stickBottom, setStickBottom] = useState(true);
  const [cache] = useState(
    new CellMeasurerCache({
      fixedWidth: true,
      minHeight: 25,
    }),
  );
  const _list = useRef<List>(null);
  const search = logdata.localSearch;
  const count = rows.length;

  const okCount = rows.reduce((okAmount, item) => {
    return typeof item === 'object' ? okAmount + 1 : okAmount;
  }, 0);

  const totalHeight = rows.reduce((val, _item, index) => {
    return val + (cache.getHeight(index, 0) || 0);
  }, 0);

  // Clear cached row heights on window resize events
  useEffect(() => {
    const listener = () => {
      cache.clearAll();
    };
    window.addEventListener('resize', listener);
    return () => window.removeEventListener('resize', listener);
  }, []); // eslint-disable-line

  // Force row height calculations after fetch ok

  useEffect(() => {
    if (_list?.current) {
      cache.clearAll();
      _list.current.recomputeRowHeights();
    }
  }, [okCount]); // eslint-disable-line

  useEffect(() => {
    if (stickBottom && _list) {
      _list.current?.scrollToRow(count);
    }
  }, [count, okCount, stickBottom]);

  //
  // Index tracking
  //

  const [scrollIndex, setIndex] = useState(0);
  const [debouncedIndex] = useDebounce(scrollIndex, 300);
  useEffect(() => {
    if (onScroll && !stickBottom) {
      onScroll(debouncedIndex);
    }
  }, [debouncedIndex, onScroll]); // eslint-disable-line

  //
  // Search features
  //

  const searchActive = search.result.active;
  const searchCurrent = search.result.current;
  const searchQuery = search.result.query;

  useEffect(() => {
    if (searchActive && search.result.result[searchCurrent]) {
      _list.current?.scrollToRow(search.result.result[searchCurrent].line);
    }
  }, [searchActive, searchCurrent, searchQuery]); //eslint-disable-line

  return (
    <div style={{ flex: '1 1 0' }} data-testid="loglist-wrapper">
      <LogActionBar
        data={logdata.logs}
        downloadlink={downloadUrl}
        setFullscreen={setFullscreen}
        search={logdata.localSearch}
        spaceAround={!!fixedHeight}
      />

      {rows.length === 0 && ['Ok', 'Error'].includes(logdata.preloadStatus) && logdata.status === 'NotAsked' && (
        <div data-testid="loglist-preload-empty">{t('task.no-preload-logs')}</div>
      )}

      {rows.length === 0 && logdata.status === 'Ok' && <div data-testid="loglist-empty">{t('task.no-logs')}</div>}

      {rows.length > 0 && (
        <LogListContainer data-testid="loglist-container">
          <AutoSizer disableHeight>
            {({ width }) => (
              <List
                ref={_list}
                overscanRowCount={5}
                rowCount={rows.length}
                rowHeight={cache.rowHeight}
                onRowsRendered={(data) => {
                  if (onScroll) {
                    setIndex(data.overscanStartIndex);
                  }
                }}
                deferredMeasurementCache={cache}
                onScroll={(args: { scrollTop: number; clientHeight: number; scrollHeight: number }) => {
                  if (args.scrollTop + args.clientHeight >= args.scrollHeight) {
                    setStickBottom(true);
                  } else if (stickBottom) {
                    setStickBottom(false);
                  }
                }}
                rowRenderer={({ index, style, key, parent }) => (
                  <CellMeasurer cache={cache} columnIndex={0} key={key} rowIndex={index} parent={parent}>
                    {() => {
                      const item = rows[index];

                      return (
                        <LogLine style={style} data-testid="log-line">
                          <LogLineNumber className="logline-number">{index}</LogLineNumber>
                          {getTimestamp(item, timezone)}
                          <LogLineText>
                            {typeof item === 'object' ? getLineText(item as Log, search.result) : 'Loading...'}
                          </LogLineText>
                        </LogLine>
                      );
                    }}
                  </CellMeasurer>
                )}
                height={fixedHeight ? fixedHeight - 16 : totalHeight < LIST_MAX_HEIGHT ? totalHeight : LIST_MAX_HEIGHT}
                width={width}
              />
            )}
          </AutoSizer>

          {!stickBottom && (
            <ScrollToBottomButton onClick={() => setStickBottom(true)} data-testid="loglist-stick-bottom">
              {t('run.scroll-to-bottom')}
            </ScrollToBottomButton>
          )}

          <PollLoader status={logdata.status} preloadStatus={logdata.preloadStatus} />
        </LogListContainer>
      )}
    </div>
  );
}

PodLogs = ({
  classes,
  tenant,
  namespace,
  podName,
  propLoading,
}: IPodLogsProps) => {
  const dispatch = useDispatch();
  const loadingTenant = useSelector(
    (state: AppState) => state.tenants.loadingTenant
  );
  const [highlight, setHighlight] = useState<string>("");
  const [logLines, setLogLines] = useState<string[]>([]);
  const [loading, setLoading] = useState<boolean>(true);

  const cache = new CellMeasurerCache({
    minWidth: 5,
    fixedHeight: false,
  });

  useEffect(() => {
    if (propLoading) {
      setLoading(true);
    }
  }, [propLoading]);

  useEffect(() => {
    if (loadingTenant) {
      setLoading(true);
    }
  }, [loadingTenant]);

  const renderLog = (logMessage: string, index: number) => {
    if (!logMessage) {
      return null;
    }
    // remove any non ascii characters, exclude any control codes
    logMessage = logMessage.replace(/([^\x20-\x7F])/g, "");

    // regex for terminal colors like e.g. `[31;4m `
    const tColorRegex = /((\[[0-9;]+m))/g;

    // get substring if there was a match for to split what
    // is going to be colored and what not, here we add color
    // only to the first match.
    let substr = logMessage.replace(tColorRegex, "");

    // in case highlight is set, we select the line that contains the requested string
    let highlightedLine =
      highlight !== ""
        ? logMessage.toLowerCase().includes(highlight.toLowerCase())
        : false;

    // if starts with multiple spaces add padding
    if (substr.startsWith("   ")) {
      return (
        <div
          key={index}
          className={`${highlightedLine ? classes.highlight : ""}`}
        >
          <span className={classes.tab}>{substr}</span>
        </div>
      );
    } else {
      // for all remaining set default class
      return (
        <div
          key={index}
          className={`${highlightedLine ? classes.highlight : ""}`}
        >
          <span className={classes.ansidefault}>{substr}</span>
        </div>
      );
    }
  };

  useEffect(() => {
    if (loading) {
      api
        .invoke(
          "GET",
          `/api/v1/namespaces/${namespace}/tenants/${tenant}/pods/${podName}`
        )
        .then((res: string) => {
          setLogLines(res.split("\n"));
          setLoading(false);
        })
        .catch((err: ErrorResponseHandler) => {
          dispatch(setErrorSnackMessage(err));
          setLoading(false);
        });
    }
  }, [loading, podName, namespace, tenant, dispatch]);

  function cellRenderer({ columnIndex, key, parent, index, style }: any) {
    return (
      // @ts-ignore
      <CellMeasurer
        cache={cache}
        columnIndex={columnIndex}
        key={key}
        parent={parent}
        rowIndex={index}
      >
        <div
          style={{
            ...style,
          }}
        >
          {renderLog(logLines[index], index)}
        </div>
      </CellMeasurer>
    );
  }

  return (
    <React.Fragment>
      <Grid item xs={12} className={classes.actionsTray}>
        <TextField
          placeholder="Highlight Line"
          className={classes.searchField}
          id="search-resource"
          label=""
          onChange={(val) => {
            setHighlight(val.target.value);
          }}
          InputProps={{
            disableUnderline: true,
            startAdornment: (
              <InputAdornment position="start">
                <SearchIcon />
              </InputAdornment>
            ),
          }}
          variant="standard"
        />
      </Grid>
      <Grid item xs={12}>
        <br />
      </Grid>
      <Grid item xs={12}>
        <Paper>
          <div className={classes.logList}>
            {logLines.length >= 1 && (
              // @ts-ignore
              <AutoSizer>
                {({ width, height }) => (
                  // @ts-ignore
                  <List
                    rowHeight={(item) => cache.rowHeight(item)}
                    overscanRowCount={15}
                    rowCount={logLines.length}
                    rowRenderer={cellRenderer}
                    width={width}
                    height={height}
                  />
                )}
              </AutoSizer>
            )}
          </div>
        </Paper>
      </Grid>
    </React.Fragment>
  );
}