right-angled
Version:
Lightweight and easy to use angular data grids. Integrates with your markup and styles rather than generating its own.
316 lines • 42.7 kB
JavaScript
import { Injectable } from '@angular/core';
import * as i0 from "@angular/core";
/**
* Represents possible operations with selection model.
*/
export class RTSelectionService {
constructor() {
this.eventEmitters = new Array();
this.childSelectionServices = new Array();
/**
* Collection of elements for selection.
*/
this.items = [];
/**
* Collection of {@link SelectionTuple} elements which represents currently selected items in {@link items} collection.
*/
this.selectionsList = new Array();
/**
* Default tracking function that will be used if nothing was specified for {@link trackByFn}.
* Implements comparison by reference equality of objects.
*/
this.trackByIdentity = (index, item) => item;
this.trackByFn = this.trackByIdentity;
}
/**
* Performs application-defined logic for service destroy.
*/
destroy() {
this.areaEventsEmitter = null;
this.eventEmitters.length = 0;
this.selectionsList.length = 0;
this.lastProcessedIndex = null;
this.items = null;
}
/**
* Performs check that every selected element is actually selected.
*
*/
checkSelection() {
if (this.items !== null && typeof this.items !== 'undefined') {
for (let i = this.selectionsList.length - 1; i >= 0; i--) {
const tuple = this.selectionsList[i];
const trackFn = this.trackByFn || this.trackByIdentity;
if (this.isIndexAcceptable(tuple.index) && trackFn(tuple.index, this.items[tuple.index]) === trackFn(tuple.index, tuple.item)) {
tuple.item = this.items[tuple.index];
this.selectItem(tuple, true);
}
else {
this.deselectItem(tuple);
}
}
}
else {
this.deselectAll();
}
}
/**
* Checks that applied index is valid number and it's value is inside {@link items} boundaries.
* @param index index to check.
* @returns `true` if index is valid.
*/
isIndexAcceptable(index) {
return index !== null && typeof index !== 'undefined' && index >= 0 && this.items && this.items.length > index;
}
/**
* Selects range of elements in {@link items} collection.
* @param fromIndex index of element from which selection range begins.
* @param toIndex index of element on which selection range ends.
*/
selectRange(fromIndex, toIndex) {
if (toIndex < 0 || this.items.length <= toIndex || fromIndex < 0 || this.items.length <= fromIndex) {
return;
}
const startIndex = Math.min(fromIndex, toIndex);
const endIndex = Math.max(fromIndex, toIndex);
if (this.isRangeSelected(startIndex, endIndex)) {
return;
}
this.deselectAll();
const tempData = new Array();
for (let i = startIndex; i <= endIndex; i++) {
const tuple = this.getSelectionTuple(i);
tempData.push(tuple);
this.processSelection(tuple, true);
}
this.selectionsList.splice(0, this.selectionsList.length, ...tempData);
this.lastProcessedIndex = endIndex;
}
/**
* Checks that at least one element selected in {@link items} collection.
* @returns `true` if anything is selected.
*/
hasSelections() {
return this.selectionsList.length !== 0;
}
/**
* Checks that all elements inside specified range are selected in {@link items} collection.
* @param fromIndex index of element from which check must be performed.
* @param toIndex index of element to which check must be performed.
* @returns `true` if all elements inside specified range are selected.
*/
isRangeSelected(from, to) {
// nothing selected
if (this.selectionsList.length === 0) {
return false;
}
// entire list selected
if (from === 0 && to === this.items.length - 1 && this.selectionsList.length === this.items.length) {
return true;
}
const orderedIndexes = this.selectionsList.map((tuple) => tuple.index).sort();
return 1 + to - from === orderedIndexes.length && orderedIndexes[0] === from && orderedIndexes[orderedIndexes.length - 1] === to;
}
/**
* Checks that element at specified index is selected.
* @param index index of element in {@link items} collection to check.
* @returns `true` if element is selected.
*/
isIndexSelected(index) {
if (this.selectionsList.length > 0 && this.isIndexAcceptable(index)) {
return this.selectionsList.findIndex((st) => st.index === index) !== -1;
}
return false;
}
/**
* Returns index of specified element in {@link items} collection.
* @param item element to find.
* @returns index of specified element in {@link items} collection. -1 if element not found.
* @see {@link trackByFn}
*/
getItemIndex(item) {
return this.items.findIndex((value) => value === item);
}
/**
* Returns index of first selected element from {@link items} collection.
* @returns index of first selected element. -1 if nothing is selected.
*/
getMinSelectedIndex() {
let minIndex = -1;
this.selectionsList.forEach((item) => {
minIndex = minIndex === -1 || item.index < minIndex ? item.index : minIndex;
});
return minIndex;
}
/**
* Returns index of last selected element from {@link items} collection.
* @returns index of last selected element. -1 if nothing is selected.
*/
getMaxSelectedIndex() {
let maxIndex = -1;
this.selectionsList.forEach((item) => {
maxIndex = maxIndex === -1 || item.index > maxIndex ? item.index : maxIndex;
});
return maxIndex;
}
/**
* Selects first element in {@link items} collection.
*/
selectFirst() {
if (this.items.length > 0) {
this.selectItem(this.getSelectionTuple(0));
}
}
/**
* Selects last element in {@link items} collection.
*/
selectLast() {
if (this.items.length > 0) {
this.selectItem(this.getSelectionTuple(this.items.length - 1));
}
}
/**
* Selects element at specified index in {@link items} collection.
* @param index index of element in {@link items} collection.
* @param savePrevious `true` if previously selected elements must stay selected after current selection.
*/
selectIndex(index, savePrevious = false) {
if (this.isIndexAcceptable(index)) {
this.selectItem(this.getSelectionTuple(index), savePrevious);
}
}
/**
* Deselects element at specified index in {@link items} collection.
* @param index index of element in {@link items} collection.
*/
deselectIndex(index) {
if (this.isIndexAcceptable(index)) {
this.deselectItem(this.getSelectionTuple(index));
}
}
/**
* Toggles selection of element at the specified index.
* @param index index of element in {@link items} collection.
* @param savePrevious `true` if previously selected elements must stay selected after current selection.
*/
toggleSelection(index, savePrevious = false) {
if (!this.isIndexAcceptable(index)) {
return;
}
const tuple = this.getSelectionTuple(index);
if (this.isIndexSelected(index) && (this.selectionsList.length === 1 || (this.selectionsList.length > 1 && savePrevious))) {
this.deselectItem(tuple);
return;
}
this.selectItem(tuple, savePrevious);
}
/**
* Returns all elements from {@link items} collection which are marked as selected.
* @returns collection of selected elements.
*/
getSelectedElements() {
return this.selectionsList.map((selectionTuple) => selectionTuple.item);
}
/**
* Returns indexes of all elements from {@link items} collection which are marked as selected.
* @returns collection of selected elements indexes in {@link items} collection.
*/
getSelectedIndexes() {
return this.selectionsList.map((selectionTuple) => selectionTuple.index);
}
/**
* Performs final processing of selection/deselection of element.
*/
processSelection(tuple, selected) {
if (Object.prototype.hasOwnProperty.call(tuple.item, 'selected')) {
tuple.item.selected = selected;
}
const initialSelectState = this.eventEmitters[tuple.index] ? this.eventEmitters[tuple.index].selected || null : null;
if (initialSelectState === null || initialSelectState !== selected) {
if (this.eventEmitters.length > tuple.index && this.eventEmitters[tuple.index]) {
this.emitEvents(this.eventEmitters[tuple.index], selected, tuple);
this.eventEmitters[tuple.index].postProcessSelection(selected);
}
if (this.areaEventsEmitter) {
this.emitEvents(this.areaEventsEmitter, selected, tuple);
}
}
}
deselectItem(selectionTuple) {
const index = this.selectionsList.findIndex((selectedItem) => selectedItem.item === selectionTuple.item);
if (index !== -1) {
this.selectionsList.splice(index, 1);
}
this.processSelection(selectionTuple, false);
this.lastProcessedIndex = selectionTuple.index;
}
selectItem(selectionTuple, savePrevious = false) {
if (savePrevious) {
const index = this.selectionsList.findIndex((selectedItem) => selectedItem.item === selectionTuple.item);
if (index !== -1) {
this.selectionsList.splice(index, 1);
}
this.selectionsList.push(selectionTuple);
this.processSelection(selectionTuple, true);
}
else {
const list = this.selectionsList.splice(0, this.selectionsList.length);
list.forEach((selectedItem) => {
this.processSelection(selectedItem, false);
});
this.selectionsList.push(selectionTuple);
this.processSelection(selectionTuple, true);
}
this.lastProcessedIndex = selectionTuple.index;
}
getSelectionTuple(index) {
return {
index,
item: this.items[index]
};
}
/**
* Selects all elements in {@link items} collection.
*/
selectAll(recursive = true) {
this.selectRange(0, this.items.length - 1);
// run this directly after render to give child selectionAreas ability to render
setTimeout(() => {
if (recursive && this.childSelectionServices) {
this.childSelectionServices.forEach(service => {
service.selectAll(recursive);
});
}
}, 0);
}
/**
* Deselects all elements in {@link items} collection.
*/
deselectAll(recursive = true) {
if (recursive && this.childSelectionServices) {
this.childSelectionServices.forEach(service => {
service.deselectAll(recursive);
});
}
const list = this.selectionsList.splice(0, this.selectionsList.length);
for (const item of list) {
this.processSelection(item, false);
}
this.lastProcessedIndex = null;
}
emitEvents(emitter, selected, tuple) {
if (selected) {
emitter.itemSelected.emit({ index: tuple.index, item: tuple.item });
}
else {
emitter.itemDeselected.emit({ index: tuple.index, item: tuple.item });
}
emitter.selectionChanged.emit({ index: tuple.index, item: tuple.item });
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: RTSelectionService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: RTSelectionService }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: RTSelectionService, decorators: [{
type: Injectable
}], ctorParameters: function () { return []; } });
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{ SelectionEventsEmitter, SelectionElementEventsEmitter } from './selection-events-emitter';\r\nimport { Injectable } from '@angular/core';\r\nexport interface SelectionTuple {\r\n  index: number;\r\n  item: any;\r\n}\r\n/**\r\n * Represents possible operations with selection model.\r\n */\r\n@Injectable()\r\nexport class RTSelectionService {\r\n  public eventEmitters: SelectionElementEventsEmitter[] = new Array<SelectionElementEventsEmitter>();\r\n  public childSelectionServices: RTSelectionService[] = new Array<RTSelectionService>();\r\n  public areaEventsEmitter: SelectionEventsEmitter;\r\n  /**\r\n   * Index of last selected/deselected element in {@link items} collection.\r\n   */\r\n\r\n  public lastProcessedIndex: number;\r\n  /**\r\n   * Optional function which can be used to compare {@link items} elements.\r\n   *\r\n   * This function can be used by {@link checkSelection}.\r\n   *\r\n   * Also it's reasonable to use this function for {@link getItemIndex}.\r\n   * @param index index of element in {@link items} collection.\r\n   * @param actual element from {@link items} collection.\r\n   */\r\n  public trackByFn: (index: number, item: any) => any;\r\n  /**\r\n   * Collection of elements for selection.\r\n   */\r\n  public items: any[] = [];\r\n\r\n  /**\r\n   * Collection of {@link SelectionTuple} elements which represents currently selected items in {@link items} collection.\r\n   */\r\n  private selectionsList: SelectionTuple[] = new Array<SelectionTuple>();\r\n\r\n  constructor() {\r\n    this.trackByFn = this.trackByIdentity;\r\n  }\r\n  /**\r\n   * Performs application-defined logic for service destroy.\r\n   */\r\n  public destroy(): void {\r\n    this.areaEventsEmitter = null;\r\n    this.eventEmitters.length = 0;\r\n    this.selectionsList.length = 0;\r\n    this.lastProcessedIndex = null;\r\n    this.items = null;\r\n  }\r\n  /**\r\n   * Performs check that every selected element is actually selected.\r\n   *\r\n   */\r\n  public checkSelection(): void {\r\n    if (this.items !== null && typeof this.items !== 'undefined') {\r\n      for (let i = this.selectionsList.length - 1; i >= 0; i--) {\r\n        const tuple = this.selectionsList[i];\r\n        const trackFn = this.trackByFn || this.trackByIdentity;\r\n        if (this.isIndexAcceptable(tuple.index) && trackFn(tuple.index, this.items[tuple.index]) === trackFn(tuple.index, tuple.item)) {\r\n          tuple.item = this.items[tuple.index];\r\n          this.selectItem(tuple, true);\r\n        } else {\r\n          this.deselectItem(tuple);\r\n        }\r\n      }\r\n    } else {\r\n      this.deselectAll();\r\n    }\r\n  }\r\n  /**\r\n   * Checks that applied index is valid number and it's value is inside {@link items} boundaries.\r\n   * @param index index to check.\r\n   * @returns `true` if index is valid.\r\n   */\r\n  public isIndexAcceptable(index: number): boolean {\r\n    return index !== null && typeof index !== 'undefined' && index >= 0 && this.items && this.items.length > index;\r\n  }\r\n  /**\r\n   * Selects range of elements in {@link items} collection.\r\n   * @param fromIndex index of element from which selection range begins.\r\n   * @param toIndex index of element on which selection range ends.\r\n   */\r\n  public selectRange(fromIndex: number, toIndex: number): void {\r\n    if (toIndex < 0 || this.items.length <= toIndex || fromIndex < 0 || this.items.length <= fromIndex) {\r\n      return;\r\n    }\r\n    const startIndex = Math.min(fromIndex, toIndex);\r\n    const endIndex = Math.max(fromIndex, toIndex);\r\n    if (this.isRangeSelected(startIndex, endIndex)) {\r\n      return;\r\n    }\r\n    this.deselectAll();\r\n    const tempData = new Array<SelectionTuple>();\r\n    for (let i = startIndex; i <= endIndex; i++) {\r\n      const tuple = this.getSelectionTuple(i);\r\n      tempData.push(tuple);\r\n      this.processSelection(tuple, true);\r\n    }\r\n    this.selectionsList.splice(0, this.selectionsList.length, ...tempData);\r\n    this.lastProcessedIndex = endIndex;\r\n  }\r\n  /**\r\n   * Checks that at least one element selected in {@link items} collection.\r\n   * @returns `true` if anything is selected.\r\n   */\r\n  public hasSelections(): boolean {\r\n    return this.selectionsList.length !== 0;\r\n  }\r\n  /**\r\n   * Checks that all elements inside specified range are selected in {@link items} collection.\r\n   * @param fromIndex index of element from which check must be performed.\r\n   * @param toIndex index of element to which check must be performed.\r\n   * @returns `true` if all elements inside specified range are selected.\r\n   */\r\n  public isRangeSelected(from: number, to: number): boolean {\r\n    // nothing selected\r\n    if (this.selectionsList.length === 0) {\r\n      return false;\r\n    }\r\n    // entire list selected\r\n    if (from === 0 && to === this.items.length - 1 && this.selectionsList.length === this.items.length) {\r\n      return true;\r\n    }\r\n    const orderedIndexes = this.selectionsList.map((tuple: SelectionTuple) => tuple.index).sort();\r\n    return 1 + to - from === orderedIndexes.length && orderedIndexes[0] === from && orderedIndexes[orderedIndexes.length - 1] === to;\r\n  }\r\n  /**\r\n   * Checks that element at specified index is selected.\r\n   * @param index index of element in {@link items} collection to check.\r\n   * @returns `true` if element is selected.\r\n   */\r\n  public isIndexSelected(index: number): boolean {\r\n    if (this.selectionsList.length > 0 && this.isIndexAcceptable(index)) {\r\n      return this.selectionsList.findIndex((st: SelectionTuple) => st.index === index) !== -1;\r\n    }\r\n    return false;\r\n  }\r\n  /**\r\n   * Returns index of specified element in {@link items} collection.\r\n   * @param item element to find.\r\n   * @returns index of specified element in {@link items} collection. -1 if element not found.\r\n   * @see {@link trackByFn}\r\n   */\r\n  public getItemIndex(item: any): number {\r\n    return this.items.findIndex((value: any) => value === item);\r\n  }\r\n  /**\r\n   * Returns index of first selected element from {@link items} collection.\r\n   * @returns index of first selected element. -1 if nothing is selected.\r\n   */\r\n  public getMinSelectedIndex(): number {\r\n    let minIndex = -1;\r\n    this.selectionsList.forEach((item: SelectionTuple) => {\r\n      minIndex = minIndex === -1 || item.index < minIndex ? item.index : minIndex;\r\n    });\r\n    return minIndex;\r\n  }\r\n  /**\r\n   * Returns index of last selected element from {@link items} collection.\r\n   * @returns index of last selected element. -1 if nothing is selected.\r\n   */\r\n  public getMaxSelectedIndex(): number {\r\n    let maxIndex = -1;\r\n    this.selectionsList.forEach((item: SelectionTuple) => {\r\n      maxIndex = maxIndex === -1 || item.index > maxIndex ? item.index : maxIndex;\r\n    });\r\n    return maxIndex;\r\n  }\r\n  /**\r\n   * Selects first element in {@link items} collection.\r\n   */\r\n  public selectFirst(): void {\r\n    if (this.items.length > 0) {\r\n      this.selectItem(this.getSelectionTuple(0));\r\n    }\r\n  }\r\n  /**\r\n   * Selects last element in {@link items} collection.\r\n   */\r\n  public selectLast(): void {\r\n    if (this.items.length > 0) {\r\n      this.selectItem(this.getSelectionTuple(this.items.length - 1));\r\n    }\r\n  }\r\n  /**\r\n   * Selects element at specified index in {@link items} collection.\r\n   * @param index index of element in {@link items} collection.\r\n   * @param savePrevious `true` if previously selected elements must stay selected after current selection.\r\n   */\r\n  public selectIndex(index: number, savePrevious = false): void {\r\n    if (this.isIndexAcceptable(index)) {\r\n      this.selectItem(this.getSelectionTuple(index), savePrevious);\r\n    }\r\n  }\r\n  /**\r\n   * Deselects element at specified index in {@link items} collection.\r\n   * @param index index of element in {@link items} collection.\r\n   */\r\n  public deselectIndex(index: number): void {\r\n    if (this.isIndexAcceptable(index)) {\r\n      this.deselectItem(this.getSelectionTuple(index));\r\n    }\r\n  }\r\n  /**\r\n   * Toggles selection of element at the specified index.\r\n   * @param index index of element in {@link items} collection.\r\n   * @param savePrevious `true` if previously selected elements must stay selected after current selection.\r\n   */\r\n  public toggleSelection(index: number, savePrevious = false): void {\r\n    if (!this.isIndexAcceptable(index)) {\r\n      return;\r\n    }\r\n    const tuple = this.getSelectionTuple(index);\r\n    if (this.isIndexSelected(index) && (this.selectionsList.length === 1 || (this.selectionsList.length > 1 && savePrevious))) {\r\n      this.deselectItem(tuple);\r\n      return;\r\n    }\r\n    this.selectItem(tuple, savePrevious);\r\n  }\r\n  /**\r\n   * Returns all elements from {@link items} collection which are marked as selected.\r\n   * @returns collection of selected elements.\r\n   */\r\n  public getSelectedElements(): any[] {\r\n    return this.selectionsList.map((selectionTuple: SelectionTuple) => selectionTuple.item);\r\n  }\r\n  /**\r\n   * Returns indexes of all elements from {@link items} collection which are marked as selected.\r\n   * @returns collection of selected elements indexes in {@link items} collection.\r\n   */\r\n  public getSelectedIndexes(): number[] {\r\n    return this.selectionsList.map((selectionTuple: SelectionTuple) => selectionTuple.index);\r\n  }\r\n  /**\r\n   * Performs final processing of selection/deselection of element.\r\n   */\r\n  public processSelection(tuple: SelectionTuple, selected: boolean): void {\r\n    if (Object.prototype.hasOwnProperty.call(tuple.item, 'selected')) {\r\n      tuple.item.selected = selected;\r\n    }\r\n    const initialSelectState = this.eventEmitters[tuple.index] ? this.eventEmitters[tuple.index].selected || null : null;\r\n    if (initialSelectState === null || initialSelectState !== selected) {\r\n      if (this.eventEmitters.length > tuple.index && this.eventEmitters[tuple.index]) {\r\n        this.emitEvents(this.eventEmitters[tuple.index], selected, tuple);\r\n        this.eventEmitters[tuple.index].postProcessSelection(selected);\r\n      }\r\n      if (this.areaEventsEmitter) {\r\n        this.emitEvents(this.areaEventsEmitter, selected, tuple);\r\n      }\r\n    }\r\n  }\r\n  /**\r\n   * Default tracking function that will be used if nothing was specified for {@link trackByFn}.\r\n   * Implements comparison by reference equality of objects.\r\n   */\r\n  private trackByIdentity: (index: number, item: any) => any = (index: number, item: any) => item;\r\n\r\n  private deselectItem(selectionTuple: SelectionTuple): void {\r\n    const index = this.selectionsList.findIndex((selectedItem: SelectionTuple) => selectedItem.item === selectionTuple.item);\r\n    if (index !== -1) {\r\n      this.selectionsList.splice(index, 1);\r\n    }\r\n    this.processSelection(selectionTuple, false);\r\n    this.lastProcessedIndex = selectionTuple.index;\r\n  }\r\n  private selectItem(selectionTuple: SelectionTuple, savePrevious = false): void {\r\n    if (savePrevious) {\r\n      const index = this.selectionsList.findIndex((selectedItem: SelectionTuple) => selectedItem.item === selectionTuple.item);\r\n      if (index !== -1) {\r\n        this.selectionsList.splice(index, 1);\r\n      }\r\n      this.selectionsList.push(selectionTuple);\r\n      this.processSelection(selectionTuple, true);\r\n    } else {\r\n      const list = this.selectionsList.splice(0, this.selectionsList.length);\r\n      list.forEach((selectedItem: SelectionTuple) => {\r\n        this.processSelection(selectedItem, false);\r\n      });\r\n      this.selectionsList.push(selectionTuple);\r\n      this.processSelection(selectionTuple, true);\r\n    }\r\n    this.lastProcessedIndex = selectionTuple.index;\r\n  }\r\n  private getSelectionTuple(index: number): SelectionTuple {\r\n    return {\r\n      index,\r\n      item: this.items[index]\r\n    };\r\n  }\r\n\r\n  /**\r\n   * Selects all elements in {@link items} collection.\r\n   */\r\n  public selectAll(recursive = true): void {\r\n    this.selectRange(0, this.items.length - 1);\r\n    // run this directly after render to give child selectionAreas ability to render\r\n    setTimeout(() => {\r\n      if (recursive && this.childSelectionServices) {\r\n        this.childSelectionServices.forEach(service => {\r\n          service.selectAll(recursive);\r\n        });\r\n      }\r\n    }, 0);\r\n  }\r\n  /**\r\n   * Deselects all elements in {@link items} collection.\r\n   */\r\n  public deselectAll(recursive = true): void {\r\n    if (recursive && this.childSelectionServices) {\r\n      this.childSelectionServices.forEach(service => {\r\n        service.deselectAll(recursive);\r\n      });\r\n    }\r\n    const list = this.selectionsList.splice(0, this.selectionsList.length);\r\n    for (const item of list) {\r\n      this.processSelection(item, false);\r\n    }\r\n    this.lastProcessedIndex = null;\r\n  }\r\n  public emitEvents(emitter: SelectionEventsEmitter, selected: boolean, tuple: SelectionTuple): void {\r\n    if (selected) {\r\n      emitter.itemSelected.emit({ index: tuple.index, item: tuple.item });\r\n    } else {\r\n      emitter.itemDeselected.emit({ index: tuple.index, item: tuple.item });\r\n    }\r\n    emitter.selectionChanged.emit({ index: tuple.index, item: tuple.item });\r\n  }\r\n}\r\n"]}