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Set to 0 to show unlimited number of rows. @Input() limit? = 10; /** * Auto reload time in ms - per default every 5s * You can set it to 0, undefined or false to disable the auto reload feature in order to * trigger 'fetchData' if the reload button is clicked. */ @Input() autoReload: any = 5000; // Which row property is unique for a row. If the identifier is not specified in any // column, then the property name of the first column is used. Defaults to 'id'. @Input() identifier = 'id'; // If 'true', then the specified identifier is used anyway, although it is not specified // in any column. Defaults to 'false'. @Input() forceIdentifier = false; // Allows other components to specify which type of selection they want, // e.g. 'single' or 'multi'. @Input() selectionType: string = undefined; // By default selected item details will be updated on table refresh, if data has changed @Input() updateSelectionOnRefresh: 'always' | 'never' | 'onChange' = 'onChange'; @Input() autoSave = true; // Only needed to set if the classAddingTpl is used @Input() customCss?: { [css: string]: number | string | ((any) => boolean) }; /** * Should be a function to update the input data if undefined nothing will be triggered * * Sometimes it's useful to only define fetchData once. * Example: * Usage of multiple tables with data which is updated by the same function * What happens: * The function is triggered through one table and all tables will update */ @Output() fetchData = new EventEmitter(); /** * This should be defined if you need access to the selection object. * * Each time the table selection changes, this will be triggered and * the new selection object will be sent. * * @memberof TableComponent */ @Output() updateSelection = new EventEmitter(); /** * Use this variable to access the selected row(s). */ selection = new CdTableSelection(); tableColumns: CdTableColumn[]; cellTemplates: { [key: string]: TemplateRef<any>; } = {}; search = ''; rows = []; loadingIndicator = true; loadingError = false; paginationClasses = { pagerLeftArrow: 'i fa fa-angle-double-left', pagerRightArrow: 'i fa fa-angle-double-right', pagerPrevious: 'i fa fa-angle-left', pagerNext: 'i fa fa-angle-right' }; userConfig: CdUserConfig = {}; tableName: string; localStorage = window.localStorage; private saveSubscriber; private reloadSubscriber; private updating = false; // Internal variable to check if it is necessary to recalculate the // table columns after the browser window has been resized. private currentWidth: number; constructor(private ngZone: NgZone, private cdRef: ChangeDetectorRef) {} ngOnInit() { this._addTemplates(); if (!this.sorts) { // Check whether the specified identifier exists. const exists = _.findIndex(this.columns, ['prop', this.identifier]) !== -1; // Auto-build the sorting configuration. If the specified identifier doesn't exist, // then use the property of the first column. this.sorts = this.createSortingDefinition( exists ? this.identifier : this.columns[0].prop + '' ); // If the specified identifier doesn't exist and it is not forced to use it anyway, // then use the property of the first column. if (!exists && !this.forceIdentifier) { this.identifier = this.columns[0].prop + ''; } } this.initUserConfig(); this.columns.forEach((c) => { if (c.cellTransformation) { c.cellTemplate = this.cellTemplates[c.cellTransformation]; } if (!c.flexGrow) { c.flexGrow = c.prop + '' === this.identifier ? 1 : 2; } if (!c.resizeable) { c.resizeable = false; } }); this.filterHiddenColumns(); // Load the data table content every N ms or at least once. // Force showing the loading indicator if there are subscribers to the fetchData // event. This is necessary because it has been set to False in useData() when // this method was triggered by ngOnChanges(). if (this.fetchData.observers.length > 0) { this.loadingIndicator = true; } if (_.isInteger(this.autoReload) && this.autoReload > 0) { this.ngZone.runOutsideAngular(() => { this.reloadSubscriber = observableTimer(0, this.autoReload).subscribe(() => { this.ngZone.run(() => { return this.reloadData(); }); }); }); } else { this.reloadData(); } } initUserConfig() { if (this.autoSave) { this.tableName = this._calculateUniqueTableName(this.columns); this._loadUserConfig(); this._initUserConfigAutoSave(); } if (!this.userConfig.limit) { this.userConfig.limit = this.limit; } if (!this.userConfig.sorts) { this.userConfig.sorts = this.sorts; } if (!this.userConfig.columns) { this.updateUserColumns(); } else { this.columns.forEach((c, i) => { c.isHidden = this.userConfig.columns[i].isHidden; }); } } _calculateUniqueTableName(columns) { const stringToNumber = (s) => { if (!_.isString(s)) { return 0; } let result = 0; for (let i = 0; i < s.length; i++) { result += s.charCodeAt(i) * i; } return result; }; return columns .reduce( (result, value, index) => (stringToNumber(value.prop) + stringToNumber(value.name)) * (index + 1) + result, 0 ) .toString(); } _loadUserConfig() { const loaded = this.localStorage.getItem(this.tableName); if (loaded) { this.userConfig = JSON.parse(loaded); } } _initUserConfigAutoSave() { const source = Observable.create(this._initUserConfigProxy.bind(this)); this.saveSubscriber = source.subscribe(this._saveUserConfig.bind(this)); } _initUserConfigProxy(observer) { this.userConfig = new Proxy(this.userConfig, { set(config, prop, value) { config[prop] = value; observer.next(config); return true; } }); } _saveUserConfig(config) { this.localStorage.setItem(this.tableName, JSON.stringify(config)); } updateUserColumns() { this.userConfig.columns = this.columns.map((c) => ({ prop: c.prop, name: c.name, isHidden: !!c.isHidden })); } filterHiddenColumns() { this.tableColumns = this.columns.filter((c) => !c.isHidden); } ngOnDestroy() { if (this.reloadSubscriber) { this.reloadSubscriber.unsubscribe(); } if (this.saveSubscriber) { this.saveSubscriber.unsubscribe(); } } ngAfterContentChecked() { // If the data table is not visible, e.g. another tab is active, and the // browser window gets resized, the table and its columns won't get resized // automatically if the tab gets visible again. // https://github.com/swimlane/ngx-datatable/issues/193 // https://github.com/swimlane/ngx-datatable/issues/193#issuecomment-329144543 if (this.table && this.table.element.clientWidth !== this.currentWidth) { this.currentWidth = this.table.element.clientWidth; this.table.recalculate(); } } _addTemplates() { this.cellTemplates.bold = this.tableCellBoldTpl; this.cellTemplates.checkIcon = this.checkIconTpl; this.cellTemplates.sparkline = this.sparklineTpl; this.cellTemplates.routerLink = this.routerLinkTpl; this.cellTemplates.perSecond = this.perSecondTpl; this.cellTemplates.executing = this.executingTpl; this.cellTemplates.classAdding = this.classAddingTpl; } useCustomClass(value: any): string { if (!this.customCss) { throw new Error('Custom classes are not set!'); } const classes = Object.keys(this.customCss); const css = Object.values(this.customCss) .map((v, i) => ((_.isFunction(v) && v(value)) || v === value) && classes[i]) .filter((x) => x) .join(' '); return _.isEmpty(css) ? undefined : css; } ngOnChanges() { this.useData(); } setLimit(e) { const value = parseInt(e.target.value, 10); if (value > 0) { this.userConfig.limit = value; } } reloadData() { if (!this.updating) { this.loadingError = false; const context = new CdTableFetchDataContext(() => { // Do we have to display the error panel? this.loadingError = context.errorConfig.displayError; // Force data table to show no data? if (context.errorConfig.resetData) { this.data = []; } // Stop the loading indicator and reset the data table // to the correct state. this.useData(); }); this.fetchData.emit(context); this.updating = true; } } refreshBtn() { this.loadingIndicator = true; this.reloadData(); } rowIdentity() { return (row) => { const id = row[this.identifier]; if (_.isUndefined(id)) { throw new Error(`Wrong identifier "${this.identifier}" -> "${id}"`); } return id; }; } useData() { if (!this.data) { return; // Wait for data } this.rows = [...this.data]; if (this.search.length > 0) { this.updateFilter(); } this.reset(); this.updateSelected(); } /** * Reset the data table to correct state. This includes: * - Disable loading indicator * - Reset 'Updating' flag */ reset() { this.loadingIndicator = false; this.updating = false; } /** * After updating the data, we have to update the selected items * because details may have changed, * or some selected items may have been removed. */ updateSelected() { if (this.updateSelectionOnRefresh === 'never') { return; } const newSelected = []; this.selection.selected.forEach((selectedItem) => { for (const row of this.data) { if (selectedItem[this.identifier] === row[this.identifier]) { newSelected.push(row); } } }); if ( this.updateSelectionOnRefresh === 'onChange' && _.isEqual(this.selection.selected, newSelected) ) { return; } this.selection.selected = newSelected; this.onSelect(); } onSelect() { this.selection.update(); this.updateSelection.emit(_.clone(this.selection)); } toggleColumn($event: any) { const prop: TableColumnProp = $event.target.name; const hide = !$event.target.checked; if (hide && this.tableColumns.length === 1) { $event.target.checked = true; return; } _.find(this.columns, (c: CdTableColumn) => c.prop === prop).isHidden = hide; this.updateColumns(); } updateColumns() { this.updateUserColumns(); this.filterHiddenColumns(); const sortProp = this.userConfig.sorts[0].prop; if (!_.find(this.tableColumns, (c: CdTableColumn) => c.prop === sortProp)) { this.userConfig.sorts = this.createSortingDefinition(this.tableColumns[0].prop); this.table.onColumnSort({ sorts: this.userConfig.sorts }); } this.table.recalculate(); this.cdRef.detectChanges(); } createSortingDefinition(prop: TableColumnProp): SortPropDir[] { return [ { prop: prop, dir: SortDirection.asc } ]; } changeSorting({ sorts }) { this.userConfig.sorts = sorts; } updateFilter(clearSearch = false) { if (clearSearch) { this.search = ''; } // prepare search strings let search = this.search.toLowerCase().replace(/,/g, ''); const columns = this.columns.filter((c) => c.cellTransformation !== CellTemplate.sparkline); if (search.match(/['"][^'"]+['"]/)) { search = search.replace(/['"][^'"]+['"]/g, (match: string) => { return match.replace(/(['"])([^'"]+)(['"])/g, '$2').replace(/ /g, '+'); }); } // update the rows this.rows = this.subSearch(this.data, search.split(' ').filter((s) => s.length > 0), columns); // Whenever the filter changes, always go back to the first page this.table.offset = 0; } subSearch(data: any[], currentSearch: string[], columns: CdTableColumn[]) { if (currentSearch.length === 0 || data.length === 0) { return data; } const searchTerms: string[] = currentSearch .pop() .replace('+', ' ') .split(':'); const columnsClone = [...columns]; const dataClone = [...data]; const filterColumns = (columnName: string) => columnsClone.filter((c) => c.name.toLowerCase().indexOf(columnName) !== -1); if (searchTerms.length === 2) { columns = filterColumns(searchTerms[0]); } const searchTerm: string = _.last(searchTerms); data = this.basicDataSearch(searchTerm, data, columns); // Checks if user searches for column but he is still typing if (data.length === 0 && searchTerms.length === 1 && filterColumns(searchTerm).length > 0) { data = dataClone; } return this.subSearch(data, currentSearch, columnsClone); } basicDataSearch(searchTerm: string, rows: any[], columns: CdTableColumn[]) { if (searchTerm.length === 0) { return rows; } return rows.filter((row) => { return ( columns.filter((col) => { let cellValue: any = _.get(row, col.prop); if (!_.isUndefined(col.pipe)) { cellValue = col.pipe.transform(cellValue); } if (_.isUndefined(cellValue) || _.isNull(cellValue)) { return false; } if (_.isArray(cellValue)) { cellValue = cellValue.join(' '); } else if (_.isNumber(cellValue) || _.isBoolean(cellValue)) { cellValue = cellValue.toString(); } return cellValue.toLowerCase().indexOf(searchTerm) !== -1; }).length > 0 ); }); } getRowClass() { // Return the function used to populate a row's CSS classes. return () => { return { clickable: !_.isUndefined(this.selectionType) }; }; } } |