New packages org (#2639)

New packages org

lib/core/pagination/pagination.component.ts

@@ -0,0 +1,210 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {
+    ChangeDetectionStrategy,
+    Component,
+    EventEmitter,
+    Input,
+    OnInit,
+    Output,
+    ViewEncapsulation
+} from '@angular/core';
+
+import { Pagination } from 'alfresco-js-api';
+import { PaginationQueryParams } from './pagination-query-params.interface';
+
+@Component({
+    selector: 'adf-pagination',
+    host: { 'class': 'adf-pagination' },
+    templateUrl: './pagination.component.html',
+    styleUrls: [ './pagination.component.scss' ],
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    encapsulation: ViewEncapsulation.None
+})
+export class PaginationComponent implements OnInit {
+
+    static DEFAULT_PAGE_SIZE: number = 25;
+
+    static DEFAULT_PAGINATION: Pagination = {
+        skipCount: 0,
+        maxItems: PaginationComponent.DEFAULT_PAGE_SIZE,
+        totalItems: 0
+    };
+
+    static ACTIONS = {
+        NEXT_PAGE: 'NEXT_PAGE',
+        PREV_PAGE: 'PREV_PAGE',
+        CHANGE_PAGE_SIZE: 'CHANGE_PAGE_SIZE',
+        CHANGE_PAGE_NUMBER: 'CHANGE_PAGE_NUMBER'
+    };
+
+    @Input()
+    supportedPageSizes: number[] = [ 25, 50, 100 ];
+
+    /** @deprecated */
+    /** "pagination" object already has "maxItems" */
+    @Input()
+    maxItems: number = PaginationComponent.DEFAULT_PAGE_SIZE;
+
+    @Input()
+    pagination: Pagination;
+
+    @Output()
+    change: EventEmitter<PaginationQueryParams> = new EventEmitter<PaginationQueryParams>();
+
+    @Output()
+    changePageNumber: EventEmitter<Pagination> = new EventEmitter<Pagination>();
+
+    @Output()
+    changePageSize: EventEmitter<Pagination> = new EventEmitter<Pagination>();
+
+    @Output()
+    nextPage: EventEmitter<Pagination> = new EventEmitter<Pagination>();
+
+    @Output()
+    prevPage: EventEmitter<Pagination> = new EventEmitter<Pagination>();
+
+    ngOnInit() {
+        if (!this.pagination) {
+            this.pagination = PaginationComponent.DEFAULT_PAGINATION;
+        }
+    }
+
+    get lastPage(): number {
+        const { maxItems, totalItems } = this.pagination;
+
+        return (totalItems && maxItems)
+            ? Math.ceil(totalItems / maxItems)
+            : 1;
+    }
+
+    get current(): number {
+        const { maxItems, skipCount } = this.pagination;
+
+        return (skipCount && maxItems)
+            ? Math.floor(skipCount / maxItems) + 1
+            : 1;
+    }
+
+    get isLastPage(): boolean {
+        const { current, lastPage } = this;
+        return current === lastPage;
+    }
+
+    get isFirstPage(): boolean {
+        return this.current === 1;
+    }
+
+    get next(): number {
+        const { isLastPage, current } = this;
+        return isLastPage ? current : current + 1;
+    }
+
+    get previous(): number {
+        const { isFirstPage, current } = this;
+        return isFirstPage ? 1 : current - 1;
+    }
+
+    get range(): number[] {
+        const { skipCount, maxItems, totalItems } = this.pagination;
+        const { isLastPage } = this;
+
+        const start = totalItems ? skipCount + 1 : 0;
+        const end = isLastPage ? totalItems : skipCount + maxItems;
+
+        return [ start, end ];
+    }
+
+    get pages(): number[] {
+        return Array(this.lastPage)
+            .fill('n')
+            .map((item, index) => (index + 1));
+    }
+
+    goNext() {
+        const { next, pagination: { maxItems } } = this;
+
+        this.handlePaginationEvent(PaginationComponent.ACTIONS.NEXT_PAGE, {
+            skipCount: (next - 1) * maxItems,
+            maxItems
+        });
+    }
+
+    goPrevious() {
+        const { previous, pagination: { maxItems } } = this;
+
+        this.handlePaginationEvent(PaginationComponent.ACTIONS.PREV_PAGE, {
+            skipCount: (previous - 1) * maxItems,
+            maxItems
+        });
+    }
+
+    onChangePageNumber(pageNumber: number) {
+        const { pagination: { maxItems } } = this;
+
+        this.handlePaginationEvent(PaginationComponent.ACTIONS.CHANGE_PAGE_NUMBER, {
+            skipCount: (pageNumber - 1) * maxItems,
+            maxItems
+        });
+    }
+
+    onChangePageSize(maxItems: number) {
+        this.handlePaginationEvent(PaginationComponent.ACTIONS.CHANGE_PAGE_SIZE, {
+            skipCount: 0,
+            maxItems
+        });
+    }
+
+    handlePaginationEvent(action: string, params: PaginationQueryParams) {
+        const {
+            NEXT_PAGE,
+            PREV_PAGE,
+            CHANGE_PAGE_NUMBER,
+            CHANGE_PAGE_SIZE
+        } = PaginationComponent.ACTIONS;
+
+        const {
+            change,
+            changePageNumber,
+            changePageSize,
+            nextPage,
+            prevPage,
+            pagination
+        } = this;
+
+        const data = Object.assign({}, pagination, params);
+
+        if (action === NEXT_PAGE) {
+            nextPage.emit(data);
+        }
+
+        if (action === PREV_PAGE) {
+            prevPage.emit(data);
+        }
+
+        if (action === CHANGE_PAGE_NUMBER) {
+            changePageNumber.emit(data);
+        }
+
+        if (action === CHANGE_PAGE_SIZE) {
+            changePageSize.emit(data);
+        }
+
+        change.emit(params);
+    }
+}