fix #402 (#412)

packages/react-bootstrap-table2-paginator/src/page.js

@@ -1,12 +1,39 @@
+/* eslint no-param-reassign: 0 */
+
+const getNormalizedPage = (
+  page,
+  pageStartIndex
+) => {
+  const offset = Math.abs(1 - pageStartIndex);
+  return page + offset;
+};
+
+const endIndex = (
+  page,
+  sizePerPage,
+  pageStartIndex
+) => (getNormalizedPage(page, pageStartIndex) * sizePerPage) - 1;
+
+const startIndex = (
+  end,
+  sizePerPage,
+) => end - (sizePerPage - 1);
+
+export const alignPage = (store, pageStartIndex, sizePerPage) => {
+  const end = endIndex(store.page, sizePerPage, pageStartIndex);
+  const dataSize = store.data.length;
+
+  if (end - 1 > dataSize) {
+    return pageStartIndex;
+  }
+  return store.page;
+};
+
 export const getByCurrPage = (store, pageStartIndex) => {
   const dataSize = store.data.length;
   if (!dataSize) return [];
-  const getNormalizedPage = () => {
-    const offset = Math.abs(1 - pageStartIndex);
-    return store.page + offset;
-  };
-  const end = (getNormalizedPage() * store.sizePerPage) - 1;
-  const start = end - (store.sizePerPage - 1);
+  const end = endIndex(store.page, store.sizePerPage, pageStartIndex);
+  const start = startIndex(end, store.sizePerPage);
 
   const result = [];
   for (let i = start; i <= end; i += 1) {

packages/react-bootstrap-table2-paginator/src/wrapper.js

@@ -4,7 +4,7 @@ import PropTypes from 'prop-types';
 
 import Const from './const';
 import Pagination from './pagination';
-import { getByCurrPage } from './page';
+import { getByCurrPage, alignPage } from './page';
 
 export default (Base, {
   remoteResolver
@@ -49,17 +49,21 @@ export default (Base, {
     componentWillReceiveProps(nextProps) {
       let needNewState = false;
       let { currPage, currSizePerPage } = this.state;
-      const { page, sizePerPage, pageStartIndex, onPageChange } = nextProps.pagination.options;
+      const { page, sizePerPage, onPageChange } = nextProps.pagination.options;
+
+      const pageStartIndex = typeof nextProps.pagination.options.pageStartIndex !== 'undefined' ?
+        nextProps.pagination.options.pageStartIndex : Const.PAGE_START_INDEX;
 
       if (typeof page !== 'undefined' && currPage !== page) { // user defined page
         currPage = page;
         needNewState = true;
       } else if (nextProps.isDataChanged) {
+        currPage = alignPage(this.props.store, pageStartIndex, currSizePerPage);
         needNewState = true;
       }
 
       if (typeof currPage === 'undefined') {
-        currPage = typeof pageStartIndex !== 'undefined' ? pageStartIndex : Const.PAGE_START_INDEX;
+        currPage = pageStartIndex;
       }
 
       if (typeof sizePerPage !== 'undefined') {

packages/react-bootstrap-table2-paginator/test/page.test.js

@@ -1,5 +1,5 @@
 import Store from 'react-bootstrap-table-next/src/store';
-import { getByCurrPage } from '../src/page';
+import { getByCurrPage, alignPage } from '../src/page';
 
 describe('Page Functions', () => {
   let data;
@@ -48,4 +48,40 @@ describe('Page Functions', () => {
       });
     });
   });
+
+  describe('alignPage', () => {
+    const pageStartIndex = 1;
+    const sizePerPage = 10;
+    describe('if the length of store.data is less than the end page index', () => {
+      beforeEach(() => {
+        data = [];
+        for (let i = 0; i < 15; i += 1) {
+          data.push({ id: i, name: `test_name${i}` });
+        }
+        store = new Store('id');
+        store.data = data;
+        store.page = 2;
+      });
+
+      it('should return pageStartIndex argument', () => {
+        expect(alignPage(store, pageStartIndex, sizePerPage)).toEqual(pageStartIndex);
+      });
+    });
+
+    describe('if the length of store.data is large than the end page index', () => {
+      beforeEach(() => {
+        data = [];
+        for (let i = 0; i < 30; i += 1) {
+          data.push({ id: i, name: `test_name${i}` });
+        }
+        store = new Store('id');
+        store.data = data;
+        store.page = 2;
+      });
+
+      it('should return current page', () => {
+        expect(alignPage(store, pageStartIndex, sizePerPage)).toEqual(store.page);
+      });
+    });
+  });
 });

packages/react-bootstrap-table2-paginator/test/wrapper.test.js

@@ -176,23 +176,6 @@ describe('Wrapper', () => {
           expect(props.store.page).toEqual(instance.state.currPage);
         });
       });
-
-      describe('when nextProps.isDataChanged is true, currPage is undefined and options.pageStartIndex exists', () => {
-        beforeEach(() => {
-          nextProps.isDataChanged = true;
-          nextProps.pagination.options.pageStartIndex = 0;
-          instance.state.currPage = undefined;
-          instance.componentWillReceiveProps(nextProps);
-        });
-
-        it('should setting currPage state correctly', () => {
-          expect(instance.state.currPage).toBe(nextProps.pagination.options.pageStartIndex);
-        });
-
-        it('should saving store.page correctly', () => {
-          expect(props.store.page).toEqual(instance.state.currPage);
-        });
-      });
     });
   });