restructure the reader

webUI/react/src/components/reader/PageNumber.tsx

@@ -0,0 +1,32 @@
+import { makeStyles } from '@material-ui/core/styles';
+import React from 'react';
+
+const useStyles = (settings: IReaderSettings) => makeStyles({
+    pageNumber: {
+        display: settings.showPageNumber ? 'block' : 'none',
+        position: 'fixed',
+        bottom: '50px',
+        right: settings.staticNav ? 'calc((100vw - 325px)/2)' : 'calc((100vw - 25px)/2)',
+        width: '50px',
+        textAlign: 'center',
+        backgroundColor: 'rgba(0, 0, 0, 0.3)',
+        borderRadius: '10px',
+    },
+});
+
+interface IProps {
+    settings: IReaderSettings
+    curPage: number
+    pageCount: number
+}
+
+export default function PageNumber(props: IProps) {
+    const { settings, curPage, pageCount } = props;
+    const classes = useStyles(settings)();
+
+    return (
+        <div className={classes.pageNumber}>
+            {`${curPage + 1} / ${pageCount}`}
+        </div>
+    );
+}