kero/js/dataTable/page.js

/**
 * Module : kero dataTable page
 * Author : liuyk(liuyk@yonyou.com)
 * Date	  : 2016-08-01 14:34:01
 */

 
const setCurrentPage = function (pageIndex, notCacheCurrentPage) {
    if (pageIndex != this.pageIndex() && notCacheCurrentPage != true)
        this.cacheCurrentPage();
    this.pageIndex(pageIndex)
    var cachedPage = this.cachedPages[this.pageIndex()]
    if (cachedPage) {
        this.removeAllRows()
        this.setRows(cachedPage.rows)
        this.setRowsSelect(cachedPage.selectedIndcies)
    }
}


/**
 * 更新分页数据
 */
const updatePages = function (pages) {
    var pageSize = this.pageSize(), pageIndex = 0, page, r, row;
    var page, index, i, rows, focus, selectIndices, status, j, row, originRow;
    for (i = 0; i < pages.length; i++) {
        index = pages[i].index
        rows = pages[i].rows
        focus = pages[i].current
        selectIndices = pages[i].select
        status = pages[i].status
        if (status === 'del') {
            this.cachedPages[index] = null;
            continue;
        }
        if (!this.cachedPages[index]) {
            page = new Page({parent: this})
            page.rows = rows;
            for (var j = 0; j < page.rows.length; j++) {
                page.rows[j].rowId = page.rows[j].id
                delete page.rows[j].id
            }
            this.cachedPages[index] = page
        } else {
            //如果是当前页，先把this.rows数据更新到page中
            if (index == this.pageIndex()) {
                this.cacheCurrentPage();
            }
            page = this.cachedPages[index]
            for (var j = 0; j < rows.length; j++) {
                r = rows[j];
                if (!r.id)
                    r.id = Row.getRandomRowId()
                if (r.status == Row.STATUS.DELETE) {
                    this.removeRowByRowId(r.id)
                } else {
                    row = page.getRowByRowId(r.id)
                    if (row) {
                        page.updateRow(row, r);
                    } else {
                        r.rowId = r.id
                        delete r.id
                        page.rows.push(r);
                    }
                }
            }
        }
        page.selectedIndices = selectIndices;
        page.focus = focus;
    }
}

/**
 * 前端分页方法，不建议使用，建议在后端进行分页
 * @param allRows
 */
const setPages = function (allRows) {
    var pageSize = this.pageSize(), pageIndex = 0, page;
    this.cachedPages = [];
    for (var i = 0; i < allRows.length; i++) {
        pageIndex = Math.floor(i / pageSize);
        if (!this.cachedPages[pageIndex]) {
            page = new Page({parent: this})
            this.cachedPages[pageIndex] = page
        }
        page.rows.push(allRows[i])
    }
    if (this.pageIndex() > -1)
        this.setCurrentPage(this.pageIndex());
    this.totalRow(allRows.length);
    this.totalPages(pageIndex + 1);
}

const hasPage = function (pageIndex) {
    return (this.pageCache && this.cachedPages[pageIndex]) ? true : false
}

const clearCache = function () {
    this.cachedPages = []
}

const cacheCurrentPage = function () {
    if (this.pageCache && this.pageIndex() > -1) {
        var page = new Page({parent: this});
        page.focus = this.getFocusIndex();
        page.selectedIndices = this.selectedIndices().slice();
        var rows = this.rows.peek();
        for (var i = 0; i < rows.length; i++) {
            var r = rows[i].getData();
            r.rowId = r.id;
            delete r.id;
            page.rows.push(r)
        }
        this.cachedPages[this.pageIndex()] = page
    }
}


export {
    setCurrentPage,
    updatePages,
    setPages,
    hasPage,
    clearCache,
    cacheCurrentPage
}