@catull/igniteui-angular
Version:
Ignite UI for Angular is a dependency-free Angular toolkit for building modern web apps
248 lines • 24.8 kB
JavaScript
import { __decorate, __metadata, __param } from "tslib";
import { Input, HostBinding, ElementRef, QueryList, Output, EventEmitter, ChangeDetectorRef, Optional, Inject, Directive } from '@angular/core';
import { Navigate } from './drop-down.common';
import { DropDownActionKey } from './drop-down.common';
import { DisplayDensityBase, DisplayDensityToken } from '../core/density';
let NEXT_ID = 0;
/**
* An abstract class, defining a drop-down component, with:
* Properties for display styles and classes
* A collection items of type `IgxDropDownItemBaseDirective`
* Properties and methods for navigating (highlighting/focusing) items from the collection
* Properties and methods for selecting items from the collection
*/
let IgxDropDownBaseDirective = class IgxDropDownBaseDirective extends DisplayDensityBase {
constructor(elementRef, cdr, _displayDensityOptions) {
super(_displayDensityOptions);
this.elementRef = elementRef;
this.cdr = cdr;
this._displayDensityOptions = _displayDensityOptions;
this._focusedItem = null;
this._id = `igx-drop-down-${NEXT_ID++}`;
/**
* Emitted when item selection is changing, before the selection completes
*
* ```html
* <igx-drop-down (onSelection)='handleSelection()'></igx-drop-down>
* ```
*/
this.onSelection = new EventEmitter();
/**
* Gets/Sets the drop down's container max height.
*
* ```typescript
* // get
* let maxHeight = this.dropdown.maxHeight;
* ```
* ```html
* <!--set-->
* <igx-drop-down [maxHeight]='200px'></igx-drop-down>
* ```
*/
this.maxHeight = null;
/**
* @hidden @internal
*/
this.cssClass = true;
}
/**
* @hidden @internal
* Get dropdown's html element of its scroll container
*/
get scrollContainer() {
return this.element;
}
/**
* Get all non-header items
*
* ```typescript
* let myDropDownItems = this.dropdown.items;
* ```
*/
get items() {
const items = [];
if (this.children !== undefined) {
for (const child of this.children.toArray()) {
if (!child.isHeader) {
items.push(child);
}
}
}
return items;
}
/**
* Get all header items
*
* ```typescript
* let myDropDownHeaderItems = this.dropdown.headers;
* ```
*/
get headers() {
const headers = [];
if (this.children !== undefined) {
for (const child of this.children.toArray()) {
if (child.isHeader) {
headers.push(child);
}
}
}
return headers;
}
/**
* Get dropdown html element
*
* ```typescript
* let myDropDownElement = this.dropdown.element;
* ```
*/
get element() {
return this.elementRef.nativeElement;
}
/** Keydown Handler */
onItemActionKey(key, event) {
switch (key) {
case DropDownActionKey.ENTER:
case DropDownActionKey.SPACE:
this.selectItem(this.focusedItem, event);
break;
case DropDownActionKey.ESCAPE:
}
}
/**
* Emits onSelection with the target item & event
* @hidden @internal
* @param newSelection the item selected
* @param event the event that triggered the call
*/
selectItem(newSelection, event) {
this.onSelection.emit({
newSelection,
oldSelection: null,
cancel: false
});
}
/**
* @hidden @internal
*/
get focusedItem() {
return this._focusedItem;
}
/**
* @hidden @internal
*/
set focusedItem(item) {
this._focusedItem = item;
}
navigate(direction, currentIndex) {
let index = -1;
if (this._focusedItem) {
index = currentIndex ? currentIndex : this.focusedItem.itemIndex;
}
const newIndex = this.getNearestSiblingFocusableItemIndex(index, direction);
this.navigateItem(newIndex);
}
getNearestSiblingFocusableItemIndex(startIndex, direction) {
let index = startIndex;
const items = this.items;
while (items[index + direction] && items[index + direction].disabled) {
index += direction;
}
index += direction;
if (index >= 0 && index < items.length) {
return index;
}
else {
return -1;
}
}
/**
* Navigates to the item on the specified index
* @param newIndex number - the index of the item in the `items` collection
*/
navigateItem(newIndex) {
if (newIndex !== -1) {
const oldItem = this._focusedItem;
const newItem = this.items[newIndex];
if (oldItem) {
oldItem.focused = false;
}
this.focusedItem = newItem;
this.scrollToHiddenItem(newItem);
this.focusedItem.focused = true;
}
}
/**
* @hidden @internal
*/
navigateFirst() {
this.navigate(Navigate.Down, -1);
}
/**
* @hidden @internal
*/
navigateLast() {
this.navigate(Navigate.Up, this.items.length);
}
/**
* @hidden @internal
*/
navigateNext() {
this.navigate(Navigate.Down);
}
/**
* @hidden @internal
*/
navigatePrev() {
this.navigate(Navigate.Up);
}
scrollToHiddenItem(newItem) {
const elementRect = newItem.element.nativeElement.getBoundingClientRect();
const parentRect = this.scrollContainer.getBoundingClientRect();
if (parentRect.top > elementRect.top) {
this.scrollContainer.scrollTop -= (parentRect.top - elementRect.top);
}
if (parentRect.bottom < elementRect.bottom) {
this.scrollContainer.scrollTop += (elementRect.bottom - parentRect.bottom);
}
}
};
IgxDropDownBaseDirective.ctorParameters = () => [
{ type: ElementRef },
{ type: ChangeDetectorRef },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [DisplayDensityToken,] }] }
];
__decorate([
Output(),
__metadata("design:type", Object)
], IgxDropDownBaseDirective.prototype, "onSelection", void 0);
__decorate([
Input(),
__metadata("design:type", String)
], IgxDropDownBaseDirective.prototype, "width", void 0);
__decorate([
Input(),
__metadata("design:type", String)
], IgxDropDownBaseDirective.prototype, "height", void 0);
__decorate([
Input(),
__metadata("design:type", String)
], IgxDropDownBaseDirective.prototype, "id", void 0);
__decorate([
Input(),
HostBinding('style.maxHeight'),
__metadata("design:type", Object)
], IgxDropDownBaseDirective.prototype, "maxHeight", void 0);
__decorate([
HostBinding('class.igx-drop-down'),
__metadata("design:type", Object)
], IgxDropDownBaseDirective.prototype, "cssClass", void 0);
IgxDropDownBaseDirective = __decorate([
Directive({
selector: '[igxDropDownBase]'
}),
__param(2, Optional()), __param(2, Inject(DisplayDensityToken)),
__metadata("design:paramtypes", [ElementRef,
ChangeDetectorRef, Object])
], IgxDropDownBaseDirective);
export { IgxDropDownBaseDirective };
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{\n    Input, HostBinding, ElementRef, QueryList, Output, EventEmitter, ChangeDetectorRef, Optional, Inject, Directive\n} from '@angular/core';\n\nimport { Navigate, ISelectionEventArgs } from './drop-down.common';\nimport { IDropDownList } from './drop-down.common';\nimport { DropDownActionKey } from './drop-down.common';\nimport { IgxDropDownItemBaseDirective } from './drop-down-item.base';\nimport { DisplayDensityBase, DisplayDensityToken, IDisplayDensityOptions } from '../core/density';\n\nlet NEXT_ID = 0;\n\n/**\n * An abstract class, defining a drop-down component, with:\n * Properties for display styles and classes\n * A collection items of type `IgxDropDownItemBaseDirective`\n * Properties and methods for navigating (highlighting/focusing) items from the collection\n * Properties and methods for selecting items from the collection\n */\n@Directive({\n    selector: '[igxDropDownBase]'\n})\nexport class IgxDropDownBaseDirective extends DisplayDensityBase implements IDropDownList {\n    protected _width;\n    protected _height;\n    protected _focusedItem: any = null;\n    protected _id = `igx-drop-down-${NEXT_ID++}`;\n\n    /**\n     * @hidden @internal\n     * Get dropdown's html element of its scroll container\n     */\n    public get scrollContainer(): HTMLElement {\n        return this.element;\n    }\n\n    /**\n     * @hidden\n     * @internal\n     */\n    public children: QueryList<IgxDropDownItemBaseDirective>;\n\n    /**\n     * Emitted when item selection is changing, before the selection completes\n     *\n     * ```html\n     * <igx-drop-down (onSelection)='handleSelection()'></igx-drop-down>\n     * ```\n     */\n    @Output()\n    public onSelection = new EventEmitter<ISelectionEventArgs>();\n\n    /**\n     *  Gets/Sets the width of the drop down\n     *\n     * ```typescript\n     * // get\n     * let myDropDownCurrentWidth = this.dropdown.width;\n     * ```\n     * ```html\n     * <!--set-->\n     * <igx-drop-down [width]='160px'></igx-drop-down>\n     * ```\n     */\n    @Input()\n    public width: string;\n\n    /**\n     * Gets/Sets the height of the drop down\n     *\n     * ```typescript\n     * // get\n     * let myDropDownCurrentHeight = this.dropdown.height;\n     * ```\n     * ```html\n     * <!--set-->\n     * <igx-drop-down [height]='400px'></igx-drop-down>\n     * ```\n     */\n    @Input()\n    public height: string;\n\n    /**\n     * Gets/Sets the drop down's id\n     *\n     * ```typescript\n     * // get\n     * let myDropDownCurrentId = this.dropdown.id;\n     * ```\n     * ```html\n     * <!--set-->\n     * <igx-drop-down [id]='newDropDownId'></igx-drop-down>\n     * ```\n     */\n    @Input()\n    public id: string;\n\n    /**\n     * Gets/Sets the drop down's container max height.\n     *\n     * ```typescript\n     * // get\n     * let maxHeight = this.dropdown.maxHeight;\n     * ```\n     * ```html\n     * <!--set-->\n     * <igx-drop-down [maxHeight]='200px'></igx-drop-down>\n     * ```\n     */\n    @Input()\n    @HostBinding('style.maxHeight')\n    public maxHeight = null;\n\n    /**\n     * @hidden @internal\n     */\n    @HostBinding('class.igx-drop-down')\n    public cssClass = true;\n\n    /**\n     * Get all non-header items\n     *\n     * ```typescript\n     * let myDropDownItems = this.dropdown.items;\n     * ```\n     */\n    public get items(): IgxDropDownItemBaseDirective[] {\n        const items: IgxDropDownItemBaseDirective[] = [];\n        if (this.children !== undefined) {\n            for (const child of this.children.toArray()) {\n                if (!child.isHeader) {\n                    items.push(child);\n                }\n            }\n        }\n\n        return items;\n    }\n\n    /**\n     * Get all header items\n     *\n     * ```typescript\n     * let myDropDownHeaderItems = this.dropdown.headers;\n     * ```\n     */\n    public get headers(): IgxDropDownItemBaseDirective[] {\n        const headers: IgxDropDownItemBaseDirective[] = [];\n        if (this.children !== undefined) {\n            for (const child of this.children.toArray()) {\n                if (child.isHeader) {\n                    headers.push(child);\n                }\n            }\n        }\n\n        return headers;\n    }\n\n    /**\n     * Get dropdown html element\n     *\n     * ```typescript\n     * let myDropDownElement = this.dropdown.element;\n     * ```\n     */\n    public get element() {\n        return this.elementRef.nativeElement;\n    }\n\n    /**\n     * Gets if the dropdown is collapsed\n     */\n    public collapsed: boolean;\n\n    constructor(\n        protected elementRef: ElementRef,\n        protected cdr: ChangeDetectorRef,\n        @Optional() @Inject(DisplayDensityToken) protected _displayDensityOptions: IDisplayDensityOptions) {\n            super(_displayDensityOptions);\n        }\n\n    /** Keydown Handler */\n    public onItemActionKey(key: DropDownActionKey, event?: Event) {\n        switch (key) {\n            case DropDownActionKey.ENTER:\n            case DropDownActionKey.SPACE:\n                this.selectItem(this.focusedItem, event);\n                break;\n            case DropDownActionKey.ESCAPE:\n        }\n    }\n\n    /**\n     * Emits onSelection with the target item & event\n     * @hidden @internal\n     * @param newSelection the item selected\n     * @param event the event that triggered the call\n     */\n    public selectItem(newSelection?: IgxDropDownItemBaseDirective, event?: Event) {\n        this.onSelection.emit({\n            newSelection,\n            oldSelection: null,\n            cancel: false\n        });\n    }\n\n    /**\n     * @hidden @internal\n     */\n    public get focusedItem(): IgxDropDownItemBaseDirective {\n        return this._focusedItem;\n    }\n\n    /**\n     * @hidden @internal\n     */\n    public set focusedItem(item: IgxDropDownItemBaseDirective) {\n        this._focusedItem = item;\n    }\n\n    protected navigate(direction: Navigate, currentIndex?: number) {\n        let index = -1;\n        if (this._focusedItem) {\n            index = currentIndex ? currentIndex : this.focusedItem.itemIndex;\n        }\n        const newIndex = this.getNearestSiblingFocusableItemIndex(index, direction);\n        this.navigateItem(newIndex);\n    }\n\n    protected getNearestSiblingFocusableItemIndex(startIndex: number, direction: Navigate): number {\n        let index = startIndex;\n        const items = this.items;\n        while (items[index + direction] && items[index + direction].disabled) {\n            index += direction;\n        }\n\n        index += direction;\n        if (index >= 0 && index < items.length) {\n            return index;\n        } else {\n            return -1;\n        }\n    }\n\n    /**\n     * Navigates to the item on the specified index\n     * @param newIndex number - the index of the item in the `items` collection\n     */\n    public navigateItem(newIndex: number) {\n        if (newIndex !== -1) {\n            const oldItem = this._focusedItem;\n            const newItem = this.items[newIndex];\n            if (oldItem) {\n                oldItem.focused = false;\n            }\n            this.focusedItem = newItem;\n            this.scrollToHiddenItem(newItem);\n            this.focusedItem.focused = true;\n        }\n    }\n\n    /**\n     * @hidden @internal\n     */\n    public navigateFirst() {\n        this.navigate(Navigate.Down, -1);\n    }\n\n    /**\n     * @hidden @internal\n     */\n    public navigateLast() {\n        this.navigate(Navigate.Up, this.items.length);\n    }\n\n    /**\n     * @hidden @internal\n     */\n    public navigateNext() {\n        this.navigate(Navigate.Down);\n    }\n\n    /**\n     * @hidden @internal\n     */\n    public navigatePrev() {\n        this.navigate(Navigate.Up);\n    }\n\n    protected scrollToHiddenItem(newItem: IgxDropDownItemBaseDirective) {\n        const elementRect = newItem.element.nativeElement.getBoundingClientRect();\n        const parentRect = this.scrollContainer.getBoundingClientRect();\n        if (parentRect.top > elementRect.top) {\n            this.scrollContainer.scrollTop -= (parentRect.top - elementRect.top);\n        }\n\n        if (parentRect.bottom < elementRect.bottom) {\n            this.scrollContainer.scrollTop += (elementRect.bottom - parentRect.bottom);\n        }\n    }\n}\n"]}