2 * Collection of grid related classses and interfaces.
4 import {TemplateRef, EventEmitter} from '@angular/core';
5 import {Observable, Subscription} from 'rxjs';
6 import {IdlService, IdlObject} from '@eg/core/idl.service';
7 import {OrgService} from '@eg/core/org.service';
8 import {ServerStoreService} from '@eg/core/server-store.service';
9 import {FormatService} from '@eg/core/format.service';
10 import {Pager} from '@eg/share/util/pager';
12 const MAX_ALL_ROW_COUNT = 10000;
14 export class GridColumn {
23 // IDL class of the object which contains this field.
24 // Not to be confused with the class of a linked object.
28 datePlusTime: boolean;
30 cellTemplate: TemplateRef<any>;
33 isDragTarget: boolean;
35 isMultiSortable: boolean;
36 disableTooltip: boolean;
37 comparator: (valueA: any, valueB: any) => number;
39 // True if the column was automatically generated.
42 flesher: (obj: any, col: GridColumn, item: any) => any;
44 getCellContext(row: any) {
48 userContext: this.cellContext
53 export class GridColumnSet {
54 columns: GridColumn[];
56 indexColumn: GridColumn;
58 isMultiSortable: boolean;
59 stockVisible: string[];
61 defaultHiddenFields: string[];
62 defaultVisibleFields: string[];
64 constructor(idl: IdlService, idlClass?: string) {
67 this.stockVisible = [];
68 this.idlClass = idlClass;
71 add(col: GridColumn) {
73 this.applyColumnDefaults(col);
75 if (!this.insertColumn(col)) {
76 // Column was rejected as a duplicate.
80 if (col.isIndex) { this.indexColumn = col; }
82 // track which fields are visible on page load.
84 this.stockVisible.push(col.name);
87 this.applyColumnSortability(col);
90 // Returns true if the new column was inserted, false otherwise.
91 // Declared columns take precedence over auto-generated columns
92 // when collisions occur.
93 // Declared columns are inserted in front of auto columns.
94 insertColumn(col: GridColumn): boolean {
97 if (this.getColByName(col.name)) {
98 // New auto-generated column conflicts with existing
102 // No collisions. Add to the end of the list
103 this.columns.push(col);
108 // Adding a declared column.
111 for (let idx = 0; idx < this.columns.length; idx++) {
112 const testCol = this.columns[idx];
113 if (testCol.name === col.name) { // match found
114 if (testCol.isAuto) {
115 // new column takes precedence, remove the existing column.
116 this.columns.splice(idx, 1);
119 // New column does not take precedence. Avoid
126 // Delcared columns are inserted just before the first auto-column
127 for (let idx = 0; idx < this.columns.length; idx++) {
128 const testCol = this.columns[idx];
129 if (testCol.isAuto) {
131 this.columns.unshift(col);
133 this.columns.splice(idx, 0, col);
139 // No insertion point found. Toss the new column on the end.
140 this.columns.push(col);
144 getColByName(name: string): GridColumn {
145 return this.columns.filter(c => c.name === name)[0];
148 idlInfoFromDotpath(dotpath: string): any {
149 if (!dotpath || !this.idlClass) { return null; }
153 let idlClass = this.idl.classes[this.idlClass];
155 const pathParts = dotpath.split(/\./);
157 for (let i = 0; i < pathParts.length; i++) {
158 const part = pathParts[i];
159 idlParent = idlField;
160 idlField = idlClass.field_map[part];
163 if (idlField['class'] && (
164 idlField.datatype === 'link' ||
165 idlField.datatype === 'org_unit')) {
166 idlClass = this.idl.classes[idlField['class']];
174 idlParent: idlParent,
182 this.columns.forEach(col => {
186 col.visible = this.stockVisible.includes(col.name);
190 applyColumnDefaults(col: GridColumn) {
192 if (!col.idlFieldDef && col.path) {
193 const idlInfo = this.idlInfoFromDotpath(col.path);
195 col.idlFieldDef = idlInfo.idlField;
196 col.idlClass = idlInfo.idlClass.name;
198 col.label = col.idlFieldDef.label || col.idlFieldDef.name;
199 col.datatype = col.idlFieldDef.datatype;
204 if (!col.name) { col.name = col.path; }
205 if (!col.flex) { col.flex = 2; }
206 if (!col.align) { col.align = 'left'; }
207 if (!col.label) { col.label = col.name; }
208 if (!col.datatype) { col.datatype = 'text'; }
210 col.visible = !col.hidden;
213 applyColumnSortability(col: GridColumn) {
214 // column sortability defaults to the sortability of the column set.
215 if (col.isSortable === undefined && this.isSortable) {
216 col.isSortable = true;
219 if (col.isMultiSortable === undefined && this.isMultiSortable) {
220 col.isMultiSortable = true;
223 if (col.isMultiSortable) {
224 col.isSortable = true;
228 displayColumns(): GridColumn[] {
229 return this.columns.filter(c => c.visible);
232 insertBefore(source: GridColumn, target: GridColumn) {
235 this.columns.forEach((col, idx) => {
236 if (col.name === target.name) { targetIdx = idx; }});
238 this.columns.forEach((col, idx) => {
239 if (col.name === source.name) { sourceIdx = idx; }});
241 if (sourceIdx >= 0) {
242 this.columns.splice(sourceIdx, 1);
245 this.columns.splice(targetIdx, 0, source);
248 // Move visible columns to the front of the list.
249 moveVisibleToFront() {
250 const newCols = this.displayColumns();
251 this.columns.forEach(col => {
252 if (!col.visible) { newCols.push(col); }});
253 this.columns = newCols;
256 moveColumn(col: GridColumn, diff: number) {
257 let srcIdx, targetIdx;
259 this.columns.forEach((c, i) => {
260 if (c.name === col.name) { srcIdx = i; }
263 targetIdx = srcIdx + diff;
266 } else if (targetIdx >= this.columns.length) {
267 // Target index follows the last visible column.
269 this.columns.forEach((c, idx) => {
270 if (c.visible) { lastVisible = idx; }
273 // When moving a column (down) causes one or more
274 // visible columns to shuffle forward, our column
275 // moves into the slot of the last visible column.
276 // Otherwise, put it into the slot directly following
277 // the last visible column.
278 targetIdx = srcIdx <= lastVisible ? lastVisible : lastVisible + 1;
281 // Splice column out of old position, insert at new position.
282 this.columns.splice(srcIdx, 1);
283 this.columns.splice(targetIdx, 0, col);
286 compileSaveObject(): GridColumnPersistConf[] {
287 // only store information about visible columns.
288 // scrunch the data down to just the needed info.
289 return this.displayColumns().map(col => {
290 const c: GridColumnPersistConf = {name : col.name};
291 if (col.align !== 'left') { c.align = col.align; }
292 if (col.flex !== 2) { c.flex = Number(col.flex); }
293 if (Number(col.sort)) { c.sort = Number(c.sort); }
298 applyColumnSettings(conf: GridColumnPersistConf[]) {
300 if (!conf || conf.length === 0) {
301 // No configuration is available, but we have a list of
302 // fields to show or hide by default
304 if (this.defaultVisibleFields) {
305 this.columns.forEach(col => {
306 if (this.defaultVisibleFields.includes(col.name)) {
313 } else if (this.defaultHiddenFields) {
314 this.defaultHiddenFields.forEach(name => {
315 const col = this.getColByName(name);
327 conf.forEach(colConf => {
328 const col = this.getColByName(colConf.name);
329 if (!col) { return; } // no such column in this grid.
332 if (colConf.align) { col.align = colConf.align; }
333 if (colConf.flex) { col.flex = Number(colConf.flex); }
334 if (colConf.sort) { col.sort = Number(colConf.sort); }
336 // Add to new columns array, avoid dupes.
337 if (newCols.filter(c => c.name === col.name).length === 0) {
342 // columns which are not expressed within the saved
343 // configuration are marked as non-visible and
344 // appended to the end of the new list of columns.
345 this.columns.forEach(c => {
346 if (conf.filter(cf => cf.name === c.name).length === 0) {
352 this.columns = newCols;
357 export class GridRowSelector {
358 indexes: {[string: string]: boolean};
364 // Returns true if all of the requested indexes exist in the selector.
365 contains(index: string | string[]): boolean {
366 const indexes = [].concat(index);
367 for (let i = 0; i < indexes.length; i++) { // early exit
368 if (!this.indexes[indexes[i]]) {
375 select(index: string | string[]) {
376 const indexes = [].concat(index);
377 indexes.forEach(i => this.indexes[i] = true);
380 deselect(index: string | string[]) {
381 const indexes = [].concat(index);
382 indexes.forEach(i => delete this.indexes[i]);
385 // Returns the list of selected index values.
386 // in some contexts (template checkboxes) the value for an index is
387 // set to false to deselect instead of having it removed (via deselect()).
389 return Object.keys(this.indexes).filter(
390 ind => Boolean(this.indexes[ind]));
394 return this.selected().length === 0;
402 export interface GridRowFlairEntry {
403 icon: string; // name of material icon
404 title?: string; // tooltip string
407 export class GridColumnPersistConf {
414 export class GridPersistConf {
417 columns: GridColumnPersistConf[];
420 export class GridContext {
425 isMultiSortable: boolean;
426 useLocalSort: boolean;
428 disableMultiSelect: boolean;
429 disableSelect: boolean;
430 dataSource: GridDataSource;
431 columnSet: GridColumnSet;
432 rowSelector: GridRowSelector;
433 toolbarButtons: GridToolbarButton[];
434 toolbarCheckboxes: GridToolbarCheckbox[];
435 toolbarActions: GridToolbarAction[];
436 lastSelectedIndex: any;
437 pageChanges: Subscription;
438 rowFlairIsEnabled: boolean;
439 rowFlairCallback: (row: any) => GridRowFlairEntry;
440 rowClassCallback: (row: any) => string;
441 cellClassCallback: (row: any, col: GridColumn) => string;
442 defaultVisibleFields: string[];
443 defaultHiddenFields: string[];
444 overflowCells: boolean;
445 showLinkSelectors: boolean;
446 disablePaging: boolean;
447 showDeclaredFieldsOnly: boolean;
449 // Allow calling code to know when the select-all-rows-in-page
450 // action has occurred.
451 selectRowsInPageEmitter: EventEmitter<void>;
453 // Services injected by our grid component
456 store: ServerStoreService;
457 format: FormatService;
462 store: ServerStoreService,
463 format: FormatService) {
468 this.format = format;
469 this.pager = new Pager();
470 this.rowSelector = new GridRowSelector();
471 this.toolbarButtons = [];
472 this.toolbarCheckboxes = [];
473 this.toolbarActions = [];
477 this.selectRowsInPageEmitter = new EventEmitter<void>();
478 this.columnSet = new GridColumnSet(this.idl, this.idlClass);
479 this.columnSet.isSortable = this.isSortable === true;
480 this.columnSet.isMultiSortable = this.isMultiSortable === true;
481 this.columnSet.defaultHiddenFields = this.defaultHiddenFields;
482 this.columnSet.defaultVisibleFields = this.defaultVisibleFields;
483 if (!this.pager.limit) {
484 this.pager.limit = this.disablePaging ? MAX_ALL_ROW_COUNT : 10;
486 this.generateColumns();
489 // Load initial settings and data.
491 this.applyGridConfig()
492 .then(ok => this.dataSource.requestPage(this.pager))
493 .then(ok => this.listenToPager());
500 applyGridConfig(): Promise<void> {
501 return this.getGridConfig(this.persistKey)
505 columns = conf.columns;
507 this.pager.limit = conf.limit;
511 // This is called regardless of the presence of saved
512 // settings so defaults can be applied.
513 this.columnSet.applyColumnSettings(columns);
518 // Give the UI time to settle before reloading grid data.
519 // This can help when data retrieval depends on a value
520 // getting modified by an angular digest cycle.
523 this.dataSource.reset();
524 this.dataSource.requestPage(this.pager);
528 // Sort the existing data source instead of requesting sorted
529 // data from the client. Reset pager to page 1. As with reload(),
530 // give the client a chance to setting before redisplaying.
534 this.sortLocalData();
535 this.dataSource.requestPage(this.pager);
539 // Subscribe or unsubscribe to page-change events from the pager.
541 if (this.pageChanges) { return; }
542 this.pageChanges = this.pager.onChange$.subscribe(
543 val => this.dataSource.requestPage(this.pager));
547 if (!this.pageChanges) { return; }
548 this.pageChanges.unsubscribe();
549 this.pageChanges = null;
552 // Sort data in the data source array
555 const sortDefs = this.dataSource.sort.map(sort => {
556 const column = this.columnSet.getColByName(sort.name);
564 if (!def.col.comparator) {
565 switch (def.col.datatype) {
569 def.col.comparator = (a, b) => {
572 if (a < b) { return -1; }
573 if (a > b) { return 1; }
578 def.col.comparator = (a, b) => {
579 if (a < b) { return -1; }
580 if (a > b) { return 1; }
589 this.dataSource.data.sort((rowA, rowB) => {
591 for (let idx = 0; idx < sortDefs.length; idx++) {
592 const sortDef = sortDefs[idx];
594 const valueA = this.getRowColumnValue(rowA, sortDef.col);
595 const valueB = this.getRowColumnValue(rowB, sortDef.col);
597 if (valueA === '' && valueB === '') { continue; }
598 if (valueA === '' && valueB !== '') { return 1; }
599 if (valueA !== '' && valueB === '') { return -1; }
601 const diff = sortDef.col.comparator(valueA, valueB);
602 if (diff === 0) { continue; }
604 return sortDef.dir === 'DESC' ? -diff : diff;
607 return 0; // No differences found.
611 getRowIndex(row: any): any {
612 const col = this.columnSet.indexColumn;
614 throw new Error('grid index column required');
616 return this.getRowColumnValue(row, col);
619 // Returns position in the data source array of the row with
620 // the provided index.
621 getRowPosition(index: any): number {
622 // for-loop for early exit
623 for (let idx = 0; idx < this.dataSource.data.length; idx++) {
624 const row = this.dataSource.data[idx];
625 if (row !== undefined && index === this.getRowIndex(row)) {
631 // Return the row with the provided index.
632 getRowByIndex(index: any): any {
633 for (let idx = 0; idx < this.dataSource.data.length; idx++) {
634 const row = this.dataSource.data[idx];
635 if (row !== undefined && index === this.getRowIndex(row)) {
641 // Returns all selected rows, regardless of whether they are
642 // currently visible in the grid display.
643 getSelectedRows(): any[] {
645 this.rowSelector.selected().forEach(index => {
646 const row = this.getRowByIndex(index);
654 getRowColumnValue(row: any, col: GridColumn): string {
658 val = this.nestedItemFieldValue(row, col);
659 } else if (col.name in row) {
660 val = this.getObjectFieldValue(row, col.name);
663 if (col.datatype === 'bool') {
664 // Avoid string-ifying bools so we can use an <eg-bool/>
665 // in the grid template.
669 return this.format.transform({
671 idlClass: col.idlClass,
672 idlField: col.idlFieldDef ? col.idlFieldDef.name : col.name,
673 datatype: col.datatype,
674 datePlusTime: Boolean(col.datePlusTime)
678 getObjectFieldValue(obj: any, name: string): any {
679 if (typeof obj[name] === 'function') {
686 nestedItemFieldValue(obj: any, col: GridColumn): string {
690 const original = obj;
691 const steps = col.path.split('.');
693 for (let i = 0; i < steps.length; i++) {
694 const step = steps[i];
696 if (obj === null || obj === undefined || typeof obj !== 'object') {
697 // We have run out of data to step through before
698 // reaching the end of the path. Conclude fleshing via
699 // callback if provided then exit.
700 if (col.flesher && obj !== undefined) {
701 return col.flesher(obj, col, original);
706 const class_ = obj.classname;
707 if (class_ && (idlClassDef = this.idl.classes[class_])) {
708 idlField = idlClassDef.field_map[step];
711 obj = this.getObjectFieldValue(obj, step);
714 // We found a nested IDL object which may or may not have
715 // been configured as a top-level column. Flesh the column
716 // metadata with our newly found IDL info.
719 col.datatype = idlField.datatype;
721 if (!col.idlFieldDef) {
722 idlField = col.idlFieldDef;
725 col.idlClass = idlClassDef.name;
728 col.label = idlField.label || idlField.name;
736 getColumnTextContent(row: any, col: GridColumn): string {
737 if (col.cellTemplate) {
739 // Extract the text content from the rendered template.
741 return this.getRowColumnValue(row, col);
745 selectOneRow(index: any) {
746 this.rowSelector.clear();
747 this.rowSelector.select(index);
748 this.lastSelectedIndex = index;
751 selectMultipleRows(indexes: any[]) {
752 this.rowSelector.clear();
753 this.rowSelector.select(indexes);
754 this.lastSelectedIndex = indexes[indexes.length - 1];
757 // selects or deselects an item, without affecting the others.
758 // returns true if the item is selected; false if de-selected.
759 toggleSelectOneRow(index: any) {
760 if (this.rowSelector.contains(index)) {
761 this.rowSelector.deselect(index);
765 this.rowSelector.select(index);
769 selectRowByPos(pos: number) {
770 const row = this.dataSource.data[pos];
772 this.selectOneRow(this.getRowIndex(row));
776 selectPreviousRow() {
777 if (!this.lastSelectedIndex) { return; }
778 const pos = this.getRowPosition(this.lastSelectedIndex);
779 if (pos === this.pager.offset) {
780 this.toPrevPage().then(ok => this.selectLastRow(), err => {});
782 this.selectRowByPos(pos - 1);
787 if (!this.lastSelectedIndex) { return; }
788 const pos = this.getRowPosition(this.lastSelectedIndex);
789 if (pos === (this.pager.offset + this.pager.limit - 1)) {
790 this.toNextPage().then(ok => this.selectFirstRow(), err => {});
792 this.selectRowByPos(pos + 1);
797 // Select the previous row in addition to any currently selected row.
798 // However, if the previous row is already selected, assume the user
799 // has reversed direction and now wants to de-select the last selected row.
800 selectMultiRowsPrevious() {
801 if (!this.lastSelectedIndex) { return; }
802 const pos = this.getRowPosition(this.lastSelectedIndex);
803 const selectedIndexes = this.rowSelector.selected();
805 const promise = // load the previous page of data if needed
806 (pos === this.pager.offset) ? this.toPrevPage() : Promise.resolve();
810 const row = this.dataSource.data[pos - 1];
811 const newIndex = this.getRowIndex(row);
812 if (selectedIndexes.filter(i => i === newIndex).length > 0) {
813 // Prev row is already selected. User is reversing direction.
814 this.rowSelector.deselect(this.lastSelectedIndex);
815 this.lastSelectedIndex = newIndex;
817 this.selectMultipleRows(selectedIndexes.concat(newIndex));
825 // Select the next row in addition to any currently selected row.
826 // However, if the next row is already selected, assume the user
827 // has reversed direction and wants to de-select the last selected row.
828 selectMultiRowsNext() {
829 if (!this.lastSelectedIndex) { return; }
830 const pos = this.getRowPosition(this.lastSelectedIndex);
831 const selectedIndexes = this.rowSelector.selected();
833 const promise = // load the next page of data if needed
834 (pos === (this.pager.offset + this.pager.limit - 1)) ?
835 this.toNextPage() : Promise.resolve();
839 const row = this.dataSource.data[pos + 1];
840 const newIndex = this.getRowIndex(row);
841 if (selectedIndexes.filter(i => i === newIndex).length > 0) {
842 // Next row is already selected. User is reversing direction.
843 this.rowSelector.deselect(this.lastSelectedIndex);
844 this.lastSelectedIndex = newIndex;
846 this.selectMultipleRows(selectedIndexes.concat(newIndex));
853 getFirstRowInPage(): any {
854 return this.dataSource.data[this.pager.offset];
857 getLastRowInPage(): any {
858 return this.dataSource.data[this.pager.offset + this.pager.limit - 1];
862 this.selectOneRow(this.getRowIndex(this.getFirstRowInPage()));
866 this.selectOneRow(this.getRowIndex(this.getLastRowInPage()));
870 const rows = this.dataSource.getPageOfRows(this.pager);
871 const indexes = rows.map(r => this.getRowIndex(r));
872 this.rowSelector.select(indexes);
873 this.selectRowsInPageEmitter.emit();
876 toPrevPage(): Promise<any> {
877 if (this.pager.isFirstPage()) {
878 return Promise.reject('on first');
880 // temp ignore pager events since we're calling requestPage manually.
882 this.pager.decrement();
883 this.listenToPager();
884 return this.dataSource.requestPage(this.pager);
887 toNextPage(): Promise<any> {
888 if (this.pager.isLastPage()) {
889 return Promise.reject('on last');
891 // temp ignore pager events since we're calling requestPage manually.
893 this.pager.increment();
894 this.listenToPager();
895 return this.dataSource.requestPage(this.pager);
898 getAllRows(): Promise<any> {
899 const pager = new Pager();
901 pager.limit = MAX_ALL_ROW_COUNT;
902 return this.dataSource.requestPage(pager);
905 // Returns a key/value pair object of visible column data as text.
906 getRowAsFlatText(row: any): any {
908 this.columnSet.displayColumns().forEach(col => {
910 this.getColumnTextContent(row, col);
915 getAllRowsAsText(): Observable<any> {
916 return Observable.create(observer => {
917 this.getAllRows().then(ok => {
918 this.dataSource.data.forEach(row => {
919 observer.next(this.getRowAsFlatText(row));
926 gridToCsv(): Promise<string> {
929 const columns = this.columnSet.displayColumns();
932 columns.forEach(col => {
933 csvStr += this.valueToCsv(col.label),
937 csvStr = csvStr.replace(/,$/, '\n');
939 return new Promise(resolve => {
940 this.getAllRowsAsText().subscribe(
942 columns.forEach(col => {
943 csvStr += this.valueToCsv(row[col.name]);
946 csvStr = csvStr.replace(/,$/, '\n');
949 () => resolve(csvStr)
955 // prepares a string for inclusion within a CSV document
956 // by escaping commas and quotes and removing newlines.
957 valueToCsv(str: string): string {
959 if (!str) { return ''; }
960 str = str.replace(/\n/g, '');
961 if (str.match(/\,/) || str.match(/"/)) {
962 str = str.replace(/"/g, '""');
963 str = '"' + str + '"';
969 if (!this.columnSet.idlClass) { return; }
971 const pkeyField = this.idl.classes[this.columnSet.idlClass].pkey;
973 // generate columns for all non-virtual fields on the IDL class
974 this.idl.classes[this.columnSet.idlClass].fields
975 .filter(field => !field.virtual)
977 const col = new GridColumn();
978 col.name = field.name;
979 col.label = field.label || field.name;
980 col.idlFieldDef = field;
981 col.idlClass = this.columnSet.idlClass;
982 col.datatype = field.datatype;
983 col.isIndex = (field.name === pkeyField);
986 if (this.showLinkSelectors) {
987 const selector = this.idl.getLinkSelector(
988 this.columnSet.idlClass, field.name);
990 col.path = field.name + '.' + selector;
994 if (this.showDeclaredFieldsOnly) {
998 this.columnSet.add(col);
1002 saveGridConfig(): Promise<any> {
1003 if (!this.persistKey) {
1004 throw new Error('Grid persistKey required to save columns');
1006 const conf = new GridPersistConf();
1008 conf.limit = this.pager.limit;
1009 conf.columns = this.columnSet.compileSaveObject();
1011 return this.store.setItem('eg.grid.' + this.persistKey, conf);
1014 // TODO: saveGridConfigAsOrgSetting(...)
1016 getGridConfig(persistKey: string): Promise<GridPersistConf> {
1017 if (!persistKey) { return Promise.resolve(null); }
1018 return this.store.getItem('eg.grid.' + persistKey);
1023 // Actions apply to specific rows
1024 export class GridToolbarAction {
1026 onClick: EventEmitter<any []>;
1027 action: (rows: any[]) => any; // DEPRECATED
1030 isGroup: boolean; // used for group placeholder entries
1032 disableOnRows: (rows: any[]) => boolean;
1035 // Buttons are global actions
1036 export class GridToolbarButton {
1038 onClick: EventEmitter<any []>;
1039 action: () => any; // DEPRECATED
1043 export class GridToolbarCheckbox {
1046 onChange: EventEmitter<boolean>;
1049 export class GridDataSource {
1053 allRowsRetrieved: boolean;
1054 requestingData: boolean;
1055 getRows: (pager: Pager, sort: any[]) => Observable<any>;
1064 this.allRowsRetrieved = false;
1067 // called from the template -- no data fetching
1068 getPageOfRows(pager: Pager): any[] {
1070 return this.data.slice(
1071 pager.offset, pager.limit + pager.offset
1072 ).filter(row => row !== undefined);
1077 // called on initial component load and user action (e.g. paging, sorting).
1078 requestPage(pager: Pager): Promise<any> {
1081 this.getPageOfRows(pager).length === pager.limit
1082 // already have all data
1083 || this.allRowsRetrieved
1084 // have no way to get more data.
1087 return Promise.resolve();
1090 // If we have to call out for data, set inFetch
1091 this.requestingData = true;
1093 return new Promise((resolve, reject) => {
1094 let idx = pager.offset;
1095 return this.getRows(pager, this.sort).subscribe(
1097 this.data[idx++] = row;
1098 this.requestingData = false;
1101 console.error(`grid getRows() error ${err}`);
1105 this.checkAllRetrieved(pager, idx);
1106 this.requestingData = false;
1113 // See if the last getRows() call resulted in the final set of data.
1114 checkAllRetrieved(pager: Pager, idx: number) {
1115 if (this.allRowsRetrieved) { return; }
1117 if (idx === 0 || idx < (pager.limit + pager.offset)) {
1118 // last query returned nothing or less than one page.
1119 // confirm we have all of the preceding pages.
1120 if (!this.data.includes(undefined)) {
1121 this.allRowsRetrieved = true;
1122 pager.resultCount = this.data.length;