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{ScrollingModule, CdkVirtualScrollViewport} from '@angular/cdk/scrolling';\nimport {NgModule,Component,ElementRef,OnInit,AfterViewInit,AfterContentInit,AfterViewChecked,OnDestroy,Input,Output,Renderer2,EventEmitter,ContentChildren,\n QueryList,ViewChild,TemplateRef,forwardRef,ChangeDetectorRef,NgZone,ViewRef,ChangeDetectionStrategy} from '@angular/core';\nimport {trigger,state,style,transition,animate,AnimationEvent} from '@angular/animations';\nimport {CommonModule} from '@angular/common';\nimport {SelectItem} from 'primeng/api';\nimport {SharedModule,PrimeTemplate} from 'primeng/api';\nimport {DomHandler} from 'primeng/dom';\nimport {ObjectUtils} from 'primeng/utils';\nimport {NG_VALUE_ACCESSOR, ControlValueAccessor} from '@angular/forms';\nimport { FilterUtils } from 'primeng/utils';\nimport {TooltipModule} from 'primeng/tooltip';\n\nexport const DROPDOWN_VALUE_ACCESSOR: any = {\n provide: NG_VALUE_ACCESSOR,\n useExisting: forwardRef(() => Dropdown),\n multi: true\n};\n\n@Component({\n selector: 'p-dropdownItem',\n template: `\n <li (click)=\"onOptionClick($event)\" role=\"option\"\n [attr.aria-label]=\"option.label\" [attr.aria-selected]=\"selected\"\n [ngStyle]=\"{'height': itemSize + 'px'}\"\n [ngClass]=\"{'ui-dropdown-item ui-corner-all':true,\n 'ui-state-highlight': selected,\n 'ui-state-disabled':(option.disabled),\n 'ui-dropdown-item-empty': !option.label||option.label.length === 0}\">\n <span *ngIf=\"!template\">{{option.label||'empty'}}</span>\n <ng-container *ngTemplateOutlet=\"template; context: {$implicit: option}\"></ng-container>\n </li>\n `\n})\nexport class DropdownItem {\n\n @Input() option: SelectItem;\n\n @Input() selected: boolean;\n\n @Input() disabled: boolean;\n\n @Input() visible: boolean;\n\n @Input() itemSize: number;\n\n @Input() template: TemplateRef<any>;\n\n @Output() onClick: EventEmitter<any> = new EventEmitter();\n\n onOptionClick(event: Event) {\n this.onClick.emit({\n originalEvent: event,\n option: this.option\n });\n }\n}\n\n@Component({\n selector: 'p-dropdown',\n template: `\n <div #container [ngClass]=\"{'ui-dropdown ui-widget ui-state-default ui-corner-all':true,\n 'ui-state-disabled':disabled, 'ui-dropdown-open':overlayVisible, 'ui-state-focus':focused, 'ui-dropdown-clearable': showClear && !disabled}\"\n (click)=\"onMouseclick($event)\" [ngStyle]=\"style\" [class]=\"styleClass\">\n <div class=\"ui-helper-hidden-accessible\">\n <input #in [attr.id]=\"inputId\" type=\"text\" [attr.aria-label]=\"selectedOption ? selectedOption.label : ' '\" readonly (focus)=\"onInputFocus($event)\" aria-haspopup=\"listbox\"\n aria-haspopup=\"listbox\" [attr.aria-expanded]=\"overlayVisible\" [attr.aria-labelledby]=\"ariaLabelledBy\" (blur)=\"onInputBlur($event)\" (keydown)=\"onKeydown($event, true)\"\n [disabled]=\"disabled\" [attr.tabindex]=\"tabindex\" [attr.autofocus]=\"autofocus\" role=\"listbox\">\n </div>\n <div class=\"ui-dropdown-label-container\" [pTooltip]=\"tooltip\" [tooltipPosition]=\"tooltipPosition\" [positionStyle]=\"tooltipPositionStyle\" [tooltipStyleClass]=\"tooltipStyleClass\">\n <label [ngClass]=\"{'ui-dropdown-label ui-inputtext ui-corner-all':true,'ui-dropdown-label-empty':(label == null || label.length === 0)}\" *ngIf=\"!editable && (label != null)\">\n <ng-container *ngIf=\"!selectedItemTemplate\">{{label||'empty'}}</ng-container>\n <ng-container *ngTemplateOutlet=\"selectedItemTemplate; context: {$implicit: selectedOption}\"></ng-container>\n </label>\n <label [ngClass]=\"{'ui-dropdown-label ui-inputtext ui-corner-all ui-placeholder':true,'ui-dropdown-label-empty': (placeholder == null || placeholder.length === 0)}\" *ngIf=\"!editable && (label == null)\">{{placeholder||'empty'}}</label>\n <input #editableInput type=\"text\" [attr.maxlength]=\"maxlength\" [attr.aria-label]=\"selectedOption ? selectedOption.label : ' '\" class=\"ui-dropdown-label ui-inputtext ui-corner-all\" *ngIf=\"editable\" [disabled]=\"disabled\" [attr.placeholder]=\"placeholder\"\n aria-haspopup=\"listbox\" [attr.aria-expanded]=\"overlayVisible\" (click)=\"onEditableInputClick($event)\" (input)=\"onEditableInputChange($event)\" (focus)=\"onEditableInputFocus($event)\" (blur)=\"onInputBlur($event)\">\n <i class=\"ui-dropdown-clear-icon pi pi-times\" (click)=\"clear($event)\" *ngIf=\"value != null && showClear && !disabled\"></i>\n </div>\n <div class=\"ui-dropdown-trigger ui-state-default ui-corner-right\" role=\"button\" aria-haspopup=\"listbox\" [attr.aria-expanded]=\"overlayVisible\">\n <span class=\"ui-dropdown-trigger-icon ui-clickable\" [ngClass]=\"dropdownIcon\"></span>\n </div>\n <div *ngIf=\"overlayVisible\" [ngClass]=\"'ui-dropdown-panel ui-widget ui-widget-content ui-corner-all ui-shadow'\" [@overlayAnimation]=\"{value: 'visible', params: {showTransitionParams: showTransitionOptions, hideTransitionParams: hideTransitionOptions}}\" (@overlayAnimation.start)=\"onOverlayAnimationStart($event)\" [ngStyle]=\"panelStyle\" [class]=\"panelStyleClass\">\n <div *ngIf=\"filter\" class=\"ui-dropdown-filter-container\" (click)=\"$event.stopPropagation()\">\n <input #filter type=\"text\" autocomplete=\"off\" [value]=\"filterValue||''\" class=\"ui-dropdown-filter ui-inputtext ui-widget ui-state-default ui-corner-all\" [attr.placeholder]=\"filterPlaceholder\"\n (keydown.enter)=\"$event.preventDefault()\" (keydown)=\"onKeydown($event, false)\" (input)=\"onFilter($event)\" [attr.aria-label]=\"ariaFilterLabel\">\n <span class=\"ui-dropdown-filter-icon pi pi-search\"></span>\n </div>\n <div class=\"ui-dropdown-items-wrapper\" [style.max-height]=\"virtualScroll ? 'auto' : (scrollHeight||'auto')\">\n <ul class=\"ui-dropdown-items ui-dropdown-list ui-widget-content ui-widget ui-corner-all ui-helper-reset\" role=\"listbox\">\n <ng-container *ngIf=\"group\">\n <ng-template ngFor let-optgroup [ngForOf]=\"optionsToDisplay\">\n <li class=\"ui-dropdown-item-group\">\n <span *ngIf=\"!groupTemplate\">{{optgroup.label||'empty'}}</span>\n <ng-container *ngTemplateOutlet=\"groupTemplate; context: {$implicit: optgroup}\"></ng-container>\n </li>\n <ng-container *ngTemplateOutlet=\"itemslist; context: {$implicit: optgroup.items, selectedOption: selectedOption}\"></ng-container>\n </ng-template>\n </ng-container>\n <ng-container *ngIf=\"!group\">\n <ng-container *ngTemplateOutlet=\"itemslist; context: {$implicit: optionsToDisplay, selectedOption: selectedOption}\"></ng-container>\n </ng-container>\n <ng-template #itemslist let-options let-selectedOption=\"selectedOption\">\n\n <ng-container *ngIf=\"!virtualScroll; else virtualScrollList\">\n <ng-template ngFor let-option let-i=\"index\" [ngForOf]=\"options\">\n <p-dropdownItem [option]=\"option\" [selected]=\"selectedOption == option\"\n (onClick)=\"onItemClick($event)\"\n [template]=\"itemTemplate\"></p-dropdownItem>\n </ng-template>\n </ng-container>\n <ng-template #virtualScrollList>\n <cdk-virtual-scroll-viewport (scrolledIndexChange)=\"scrollToSelectedVirtualScrollElement()\" #viewport [ngStyle]=\"{'height': scrollHeight}\" [itemSize]=\"itemSize\" *ngIf=\"virtualScroll && optionsToDisplay && optionsToDisplay.length\">\n <ng-container *cdkVirtualFor=\"let option of options; let i = index; let c = count; let f = first; let l = last; let e = even; let o = odd\">\n <p-dropdownItem [option]=\"option\" [selected]=\"selectedOption == option\"\n (onClick)=\"onItemClick($event)\"\n [template]=\"itemTemplate\"></p-dropdownItem>\n </ng-container>\n </cdk-virtual-scroll-viewport>\n </ng-template>\n </ng-template>\n <li *ngIf=\"filter && (!optionsToDisplay || (optionsToDisplay && optionsToDisplay.length === 0))\" class=\"ui-dropdown-empty-message\">{{emptyFilterMessage}}</li>\n </ul>\n </div>\n </div>\n </div>\n `,\n animations: [\n trigger('overlayAnimation', [\n state('void', style({\n transform: 'translateY(5%)',\n opacity: 0\n })),\n state('visible', style({\n transform: 'translateY(0)',\n opacity: 1\n })),\n transition('void => visible', animate('{{showTransitionParams}}')),\n transition('visible => void', animate('{{hideTransitionParams}}'))\n ])\n ],\n host: {\n '[class.ui-inputwrapper-filled]': 'filled',\n '[class.ui-inputwrapper-focus]': 'focused'\n },\n providers: [DROPDOWN_VALUE_ACCESSOR],\n changeDetection: ChangeDetectionStrategy.Default\n})\nexport class Dropdown implements OnInit,AfterViewInit,AfterContentInit,AfterViewChecked,OnDestroy,ControlValueAccessor {\n\n @Input() scrollHeight: string = '200px';\n\n @Input() filter: boolean;\n\n @Input() name: string;\n\n @Input() style: any;\n\n @Input() panelStyle: any;\n\n @Input() styleClass: string;\n\n @Input() panelStyleClass: string;\n\n @Input() readonly: boolean;\n\n @Input() required: boolean;\n\n @Input() editable: boolean;\n\n @Input() appendTo: any;\n\n @Input() tabindex: number;\n\n @Input() placeholder: string;\n\n @Input() filterPlaceholder: string;\n\n @Input() filterLocale: string;\n\n @Input() inputId: string;\n\n @Input() selectId: string;\n\n @Input() dataKey: string;\n\n @Input() filterBy: string = 'label';\n\n @Input() autofocus: boolean;\n\n @Input() resetFilterOnHide: boolean = false;\n\n @Input() dropdownIcon: string = 'pi pi-chevron-down';\n\n @Input() optionLabel: string;\n\n @Input() autoDisplayFirst: boolean = true;\n\n @Input() group: boolean;\n\n @Input() showClear: boolean;\n\n @Input() emptyFilterMessage: string = 'No results found';\n\n @Input() virtualScroll: boolean;\n\n @Input() itemSize: number;\n\n @Input() autoZIndex: boolean = true;\n\n @Input() baseZIndex: number = 0;\n\n @Input() showTransitionOptions: string = '225ms ease-out';\n\n @Input() hideTransitionOptions: string = '195ms ease-in';\n\n @Input() ariaFilterLabel: string;\n\n @Input() ariaLabelledBy: string;\n\n @Input() filterMatchMode: string = \"contains\";\n\n @Input() maxlength: number;\n\n @Input() tooltip: string = '';\n\n @Input() tooltipPosition: string = 'right';\n\n @Input() tooltipPositionStyle: string = 'absolute';\n\n @Input() tooltipStyleClass: string;\n\n @Input() autofocusFilter: boolean = true;\n\n @Output() onChange: EventEmitter<any> = new EventEmitter();\n\n @Output() onFocus: EventEmitter<any> = new EventEmitter();\n\n @Output() onBlur: EventEmitter<any> = new EventEmitter();\n\n @Output() onClick: EventEmitter<any> = new EventEmitter();\n\n @Output() onShow: EventEmitter<any> = new EventEmitter();\n\n @Output() onHide: EventEmitter<any> = new EventEmitter();\n\n @ViewChild('container') containerViewChild: ElementRef;\n\n @ViewChild('filter') filterViewChild: ElementRef;\n\n @ViewChild('in') focusViewChild: ElementRef;\n\n @ViewChild(CdkVirtualScrollViewport) viewPort: CdkVirtualScrollViewport;\n\n @ViewChild('editableInput') editableInputViewChild: ElementRef;\n\n @ContentChildren(PrimeTemplate) templates: QueryList<any>;\n\n private _disabled: boolean;\n\n @Input() get disabled(): boolean {\n return this._disabled;\n };\n\n set disabled(_disabled: boolean) {\n if (_disabled)\n this.focused = false;\n\n this._disabled = _disabled;\n if (!(this.cd as ViewRef).destroyed) {\n this.cd.detectChanges();\n }\n }\n\n overlay: HTMLDivElement;\n\n itemsWrapper: HTMLDivElement;\n\n itemTemplate: TemplateRef<any>;\n\n groupTemplate: TemplateRef<any>;\n\n selectedItemTemplate: TemplateRef<any>;\n\n selectedOption: any;\n\n _options: any[];\n\n value: any;\n\n onModelChange: Function = () => {};\n\n onModelTouched: Function = () => {};\n\n optionsToDisplay: any[];\n\n hover: boolean;\n\n focused: boolean;\n\n filled: boolean;\n\n overlayVisible: boolean;\n\n documentClickListener: any;\n\n optionsChanged: boolean;\n\n panel: HTMLDivElement;\n\n dimensionsUpdated: boolean;\n\n selfClick: boolean;\n\n itemClick: boolean;\n\n clearClick: boolean;\n\n hoveredItem: any;\n\n selectedOptionUpdated: boolean;\n\n filterValue: string;\n\n searchValue: string;\n\n searchIndex: number;\n\n searchTimeout: any;\n\n previousSearchChar: string;\n\n currentSearchChar: string;\n\n documentResizeListener: any;\n\n virtualAutoScrolled: boolean;\n\n virtualScrollSelectedIndex: number;\n\n viewPortOffsetTop: number = 0;\n\n preventModelTouched: boolean;\n\n constructor(public el: ElementRef, public renderer: Renderer2, private cd: ChangeDetectorRef, public zone: NgZone) {}\n\n ngAfterContentInit() {\n this.templates.forEach((item) => {\n switch(item.getType()) {\n case 'item':\n this.itemTemplate = item.template;\n break;\n\n case 'selectedItem':\n this.selectedItemTemplate = item.template;\n break;\n\n case 'group':\n this.groupTemplate = item.template;\n break;\n\n default:\n this.itemTemplate = item.template;\n break;\n }\n });\n }\n\n ngOnInit() {\n this.optionsToDisplay = this.options;\n this.updateSelectedOption(null);\n }\n\n @Input() get options(): any[] {\n return this._options;\n }\n\n set options(val: any[]) {\n let opts = this.optionLabel ? ObjectUtils.generateSelectItems(val, this.optionLabel) : val;\n this._options = opts;\n this.optionsToDisplay = this._options;\n this.updateSelectedOption(this.value);\n this.optionsChanged = true;\n this.updateFilledState();\n\n if (this.filterValue && this.filterValue.length) {\n this.activateFilter();\n }\n }\n\n ngAfterViewInit()Â {\n if (this.editable) {\n this.updateEditableLabel();\n }\n }\n\n get label(): string {\n return (this.selectedOption ? this.selectedOption.label : null);\n }\n\n updateEditableLabel(): void {\n if (this.editableInputViewChild && this.editableInputViewChild.nativeElement) {\n this.editableInputViewChild.nativeElement.value = (this.selectedOption ? this.selectedOption.label : this.value||'');\n }\n }\n\n onItemClick(event) {\n const option = event.option;\n this.itemClick = true;\n\n if (!option.disabled) {\n this.selectItem(event, option);\n this.focusViewChild.nativeElement.focus();\n }\n\n setTimeout(() => {\n this.hide(event);\n }, 150);\n }\n\n selectItem(event, option) {\n if (this.selectedOption != option) {\n this.selectedOption = option;\n this.value = option.value;\n this.filled = true;\n\n this.onModelChange(this.value);\n this.updateEditableLabel();\n this.onChange.emit({\n originalEvent: event.originalEvent,\n value: this.value\n });\n\n if (this.virtualScroll) {\n setTimeout(() => {\n this.viewPortOffsetTop = this.viewPort ? this.viewPort.measureScrollOffset() : 0;\n }, 1);\n }\n }\n }\n\n ngAfterViewChecked() {\n if (this.optionsChanged && this.overlayVisible) {\n this.optionsChanged = false;\n\n if (this.virtualScroll) {\n this.updateVirtualScrollSelectedIndex(true);\n }\n\n this.zone.runOutsideAngular(() => {\n setTimeout(() => {\n this.alignOverlay();\n }, 1);\n });\n }\n\n if (this.selectedOptionUpdated && this.itemsWrapper) {\n if (this.virtualScroll && this.viewPort) {\n let range = this.viewPort.getRenderedRange();\n this.updateVirtualScrollSelectedIndex(false);\n\n if (range.start > this.virtualScrollSelectedIndex || range.end < this.virtualScrollSelectedIndex) {\n this.viewPort.scrollToIndex(this.virtualScrollSelectedIndex);\n }\n }\n\n let selectedItem = DomHandler.findSingle(this.overlay, 'li.ui-state-highlight');\n if (selectedItem) {\n DomHandler.scrollInView(this.itemsWrapper, DomHandler.findSingle(this.overlay, 'li.ui-state-highlight'));\n }\n this.selectedOptionUpdated = false;\n }\n }\n\n writeValue(value: any): void {\n if (this.filter) {\n this.resetFilter();\n }\n\n this.value = value;\n this.updateSelectedOption(value);\n this.updateEditableLabel();\n this.updateFilledState();\n this.cd.markForCheck();\n }\n\n resetFilter(): void {\n this.filterValue = null;\n\n if (this.filterViewChild && this.filterViewChild.nativeElement) {\n this.filterViewChild.nativeElement.value = '';\n }\n\n this.optionsToDisplay = this.options;\n }\n\n updateSelectedOption(val: any): void {\n this.selectedOption = this.findOption(val, this.optionsToDisplay);\n if (this.autoDisplayFirst && !this.placeholder && !this.selectedOption && this.optionsToDisplay && this.optionsToDisplay.length && !this.editable) {\n this.selectedOption = this.optionsToDisplay[0];\n }\n this.selectedOptionUpdated = true;\n }\n\n registerOnChange(fn: Function): void {\n this.onModelChange = fn;\n }\n\n registerOnTouched(fn: Function): void {\n this.onModelTouched = fn;\n }\n\n setDisabledState(val: boolean): void {\n this.disabled = val;\n }\n\n onMouseclick(event) {\n if (this.disabled||this.readonly) {\n return;\n }\n\n this.onClick.emit(event);\n\n this.selfClick = true;\n this.clearClick = DomHandler.hasClass(event.target, 'ui-dropdown-clear-icon');\n\n if (!this.itemClick && !this.clearClick) {\n this.focusViewChild.nativeElement.focus();\n\n if (this.overlayVisible)\n this.hide(event);\n else\n this.show();\n\n this.cd.detectChanges();\n }\n }\n\n onEditableInputClick(event) {\n this.itemClick = true;\n this.bindDocumentClickListener();\n }\n\n onEditableInputFocus(event) {\n this.focused = true;\n this.hide(event);\n this.onFocus.emit(event);\n }\n\n onEditableInputChange(event) {\n this.value = event.target.value;\n this.updateSelectedOption(this.value);\n this.onModelChange(this.value);\n this.onChange.emit({\n originalEvent: event,\n value: this.value\n });\n }\n\n show() {\n this.overlayVisible = true;\n }\n\n onOverlayAnimationStart(event: AnimationEvent) {\n switch (event.toState) {\n case 'visible':\n this.overlay = event.element;\n let itemsWrapperSelector = this.virtualScroll ? '.cdk-virtual-scroll-viewport' : '.ui-dropdown-items-wrapper';\n this.itemsWrapper = DomHandler.findSingle(this.overlay, itemsWrapperSelector);\n this.appendOverlay();\n if (this.autoZIndex) {\n this.overlay.style.zIndex = String(this.baseZIndex + (++DomHandler.zindex));\n }\n this.alignOverlay();\n this.bindDocumentClickListener();\n this.bindDocumentResizeListener();\n\n if (this.options && this.options.length) {\n if (!this.virtualScroll) {\n let selectedListItem = DomHandler.findSingle(this.itemsWrapper, '.ui-dropdown-item.ui-state-highlight');\n if (selectedListItem) {\n DomHandler.scrollInView(this.itemsWrapper, selectedListItem);\n }\n }\n }\n\n if (this.filterViewChild && this.filterViewChild.nativeElement) {\n this.preventModelTouched = true;\n\n if (this.autofocusFilter) {\n this.filterViewChild.nativeElement.focus();\n }\n }\n\n this.onShow.emit(event);\n break;\n\n case 'void':\n this.onOverlayHide();\n break;\n }\n }\n\n scrollToSelectedVirtualScrollElement() {\n if (!this.virtualAutoScrolled) {\n if (this.viewPortOffsetTop) {\n this.viewPort.scrollToOffset(this.viewPortOffsetTop);\n }\n else if (this.virtualScrollSelectedIndex > -1) {\n this.viewPort.scrollToIndex(this.virtualScrollSelectedIndex);\n }\n }\n\n this.virtualAutoScrolled = true;\n }\n\n updateVirtualScrollSelectedIndex(resetOffset) {\n if (this.selectedOption && this.optionsToDisplay && this.optionsToDisplay.length) {\n if (resetOffset) {\n this.viewPortOffsetTop = 0;\n }\n\n this.virtualScrollSelectedIndex = this.findOptionIndex(this.selectedOption.value, this.optionsToDisplay);\n }\n }\n\n appendOverlay() {\n if (this.appendTo) {\n if (this.appendTo === 'body')\n document.body.appendChild(this.overlay);\n else\n DomHandler.appendChild(this.overlay, this.appendTo);\n\n if (!this.overlay.style.minWidth) {\n this.overlay.style.minWidth = DomHandler.getWidth(this.containerViewChild.nativeElement) + 'px';\n }\n }\n }\n\n restoreOverlayAppend() {\n if (this.overlay && this.appendTo) {\n this.el.nativeElement.appendChild(this.overlay);\n }\n }\n\n hide(event) {\n this.overlayVisible = false;\n\n if (this.filter && this.resetFilterOnHide) {\n this.resetFilter();\n }\n\n if (this.virtualScroll) {\n this.virtualAutoScrolled = false;\n }\n\n this.cd.markForCheck();\n this.onHide.emit(event);\n }\n\n alignOverlay() {\n if (this.overlay) {\n if (this.appendTo)\n DomHandler.absolutePosition(this.overlay, this.containerViewChild.nativeElement);\n else\n DomHandler.relativePosition(this.overlay, this.containerViewChild.nativeElement);\n }\n }\n\n onInputFocus(event) {\n this.focused = true;\n this.onFocus.emit(event);\n }\n\n onInputBlur(event) {\n this.focused = false;\n this.onBlur.emit(event);\n\n if (!this.preventModelTouched) {\n this.onModelTouched();\n }\n this.preventModelTouched = false;\n }\n\n findPrevEnabledOption(index) {\n let prevEnabledOption;\n\n if (this.optionsToDisplay && this.optionsToDisplay.length) {\n for (let i = (index - 1); 0 <= i; i--) {\n let option = this.optionsToDisplay[i];\n if (option.disabled) {\n continue;\n }\n else {\n prevEnabledOption = option;\n break;\n }\n }\n\n if (!prevEnabledOption) {\n for (let i = this.optionsToDisplay.length - 1; i >= index ; i--) {\n let option = this.optionsToDisplay[i];\n if (option.disabled) {\n continue;\n }\n else {\n prevEnabledOption = option;\n break;\n }\n }\n }\n }\n\n return prevEnabledOption;\n }\n\n findNextEnabledOption(index) {\n let nextEnabledOption;\n\n if (this.optionsToDisplay && this.optionsToDisplay.length) {\n for (let i = (index + 1); index < (this.optionsToDisplay.length - 1); i++) {\n let option = this.optionsToDisplay[i];\n if (option.disabled) {\n continue;\n }\n else {\n nextEnabledOption = option;\n break;\n }\n }\n\n if (!nextEnabledOption) {\n for (let i = 0; i < index; i++) {\n let option = this.optionsToDisplay[i];\n if (option.disabled) {\n continue;\n }\n else {\n nextEnabledOption = option;\n break;\n }\n }\n }\n }\n\n return nextEnabledOption;\n }\n\n onKeydown(event: KeyboardEvent, search: boolean) {\n if (this.readonly || !this.optionsToDisplay || this.optionsToDisplay.length === null) {\n return;\n }\n\n switch(event.which) {\n //down\n case 40:\n if (!this.overlayVisible && event.altKey) {\n this.show();\n }\n else {\n if (this.group) {\n let selectedItemIndex = this.selectedOption ? this.findOptionGroupIndex(this.selectedOption.value, this.optionsToDisplay) : -1;\n\n if (selectedItemIndex !== -1) {\n let nextItemIndex = selectedItemIndex.itemIndex + 1;\n if (nextItemIndex < (this.optionsToDisplay[selectedItemIndex.groupIndex].items.length)) {\n this.selectItem(event, this.optionsToDisplay[selectedItemIndex.groupIndex].items[nextItemIndex]);\n this.selectedOptionUpdated = true;\n }\n else if (this.optionsToDisplay[selectedItemIndex.groupIndex + 1]) {\n this.selectItem(event, this.optionsToDisplay[selectedItemIndex.groupIndex + 1].items[0]);\n this.selectedOptionUpdated = true;\n }\n }\n else {\n this.selectItem(event, this.optionsToDisplay[0].items[0]);\n }\n }\n else {\n let selectedItemIndex = this.selectedOption ? this.findOptionIndex(this.selectedOption.value, this.optionsToDisplay) : -1;\n let nextEnabledOption = this.findNextEnabledOption(selectedItemIndex);\n if (nextEnabledOption) {\n this.selectItem(event, nextEnabledOption);\n this.selectedOptionUpdated = true;\n }\n }\n }\n\n event.preventDefault();\n\n break;\n\n //up\n case 38:\n if (this.group) {\n let selectedItemIndex = this.selectedOption ? this.findOptionGroupIndex(this.selectedOption.value, this.optionsToDisplay) : -1;\n if (selectedItemIndex !== -1) {\n let prevItemIndex = selectedItemIndex.itemIndex - 1;\n if (prevItemIndex >= 0) {\n this.selectItem(event, this.optionsToDisplay[selectedItemIndex.groupIndex].items[prevItemIndex]);\n this.selectedOptionUpdated = true;\n }\n else if (prevItemIndex < 0) {\n let prevGroup = this.optionsToDisplay[selectedItemIndex.groupIndex - 1];\n if (prevGroup) {\n this.selectItem(event, prevGroup.items[prevGroup.items.length - 1]);\n this.selectedOptionUpdated = true;\n }\n }\n }\n }\n else {\n let selectedItemIndex = this.selectedOption ? this.findOptionIndex(this.selectedOption.value, this.optionsToDisplay) : -1;\n let prevEnabledOption = this.findPrevEnabledOption(selectedItemIndex);\n if (prevEnabledOption) {\n this.selectItem(event, prevEnabledOption);\n this.selectedOptionUpdated = true;\n }\n }\n\n event.preventDefault();\n break;\n\n //space\n case 32:\n case 32:\n if (!this.overlayVisible){\n this.show();\n event.preventDefault();\n }\n break;\n\n //enter\n case 13:\n if (!this.filter || (this.optionsToDisplay && this.optionsToDisplay.length > 0)) {\n this.hide(event);\n }\n\n event.preventDefault();\n break;\n\n //escape and tab\n case 27:\n case 9:\n this.hide(event);\n break;\n\n //search item based on keyboard input\n default:\n if (search) {\n this.search(event);\n }\n break;\n }\n }\n\n search(event) {\n if (this.searchTimeout) {\n clearTimeout(this.searchTimeout);\n }\n\n const char = event.key;\n this.previousSearchChar = this.currentSearchChar;\n this.currentSearchChar = char;\n\n if (this.previousSearchChar === this.currentSearchChar)\n this.searchValue = this.currentSearchChar;\n else\n this.searchValue = this.searchValue ? this.searchValue + char : char;\n\n let newOption;\n if (this.group) {\n let searchIndex = this.selectedOption ? this.findOptionGroupIndex(this.selectedOption.value, this.optionsToDisplay) : {groupIndex: 0, itemIndex: 0};\n newOption = this.searchOptionWithinGroup(searchIndex);\n }\n else {\n let searchIndex = this.selectedOption ? this.findOptionIndex(this.selectedOption.value, this.optionsToDisplay) : -1;\n newOption = this.searchOption(++searchIndex);\n }\n\n if (newOption && !newOption.disabled) {\n this.selectItem(event, newOption);\n this.selectedOptionUpdated = true;\n }\n\n this.searchTimeout = setTimeout(() => {\n this.searchValue = null;\n }, 250);\n }\n\n searchOption(index) {\n let option;\n\n if (this.searchValue) {\n option = this.searchOptionInRange(index, this.optionsToDisplay.length);\n\n if (!option) {\n option = this.searchOptionInRange(0, index);\n }\n }\n\n return option;\n }\n\n searchOptionInRange(start, end) {\n for (let i = start; i < end; i++) {\n let opt = this.optionsToDisplay[i];\n if (opt.label.toLocaleLowerCase(this.filterLocale).startsWith((this.searchValue as any).toLocaleLowerCase(this.filterLocale)) && !opt.disabled) {\n return opt;\n }\n }\n\n return null;\n }\n\n searchOptionWithinGroup(index) {\n let option;\n\n if (this.searchValue) {\n for (let i = index.groupIndex; i < this.optionsToDisplay.length; i++) {\n for (let j = (index.groupIndex === i) ? (index.itemIndex + 1) : 0; j < this.optionsToDisplay[i].items.length; j++) {\n let opt = this.optionsToDisplay[i].items[j];\n if (opt.label.toLocaleLowerCase(this.filterLocale).startsWith((this.searchValue as any).toLocaleLowerCase(this.filterLocale)) && !opt.disabled) {\n return opt;\n }\n }\n }\n\n if (!option) {\n for (let i = 0; i <= index.groupIndex; i++) {\n for (let j = 0; j < ((index.groupIndex === i) ? index.itemIndex : this.optionsToDisplay[i].items.length); j++) {\n let opt = this.optionsToDisplay[i].items[j];\n if (opt.label.toLocaleLowerCase(this.filterLocale).startsWith((this.searchValue as any).toLocaleLowerCase(this.filterLocale)) && !opt.disabled) {\n return opt;\n }\n }\n }\n }\n }\n\n return null;\n }\n\n findOptionIndex(val: any, opts: any[]): number {\n let index: number = -1;\n if (opts) {\n for (let i = 0; i < opts.length; i++) {\n if ((val == null && opts[i].value == null) ||Â ObjectUtils.equals(val, opts[i].value, this.dataKey)) {\n index = i;\n break;\n }\n }\n }\n\n return index;\n }\n\n findOptionGroupIndex(val: any, opts: any[]): any {\n let groupIndex, itemIndex;\n\n if (opts) {\n for (let i = 0; i < opts.length; i++) {\n groupIndex = i;\n itemIndex = this.findOptionIndex(val, opts[i].items);\n\n if (itemIndex !== -1) {\n break;\n }\n }\n }\n\n if (itemIndex !== -1) {\n return {groupIndex: groupIndex, itemIndex: itemIndex};\n }\n else {\n return -1;\n }\n }\n\n findOption(val: any, opts: any[], inGroup?: boolean): SelectItem {\n if (this.group && !inGroup) {\n let opt: SelectItem;\n if (opts && opts.length) {\n for (let optgroup of opts) {\n opt = this.findOption(val, optgroup.items, true);\n if (opt) {\n break;\n }\n }\n }\n return opt;\n }\n else {\n let index: number = this.findOptionIndex(val, opts);\n return (index != -1) ? opts[index] : null;\n }\n }\n\n onFilter(event): void {\n let inputValue = event.target.value;\n if (inputValue && inputValue.length) {\n this.filterValue = inputValue;\n this.activateFilter();\n }\n else {\n this.filterValue = null;\n this.optionsToDisplay = this.options;\n }\n\n this.optionsChanged = true;\n }\n\n activateFilter() {\n let searchFields: string[] = this.filterBy.split(',');\n\n if (this.options && this.options.length) {\n if (this.group) {\n let filteredGroups = [];\n for (let optgroup of this.options) {\n let filteredSubOptions = FilterUtils.filter(optgroup.items, searchFields, this.filterValue, this.filterMatchMode, this.filterLocale);\n if (filteredSubOptions && filteredSubOptions.length) {\n filteredGroups.push({\n label: optgroup.label,\n value: optgroup.value,\n items: filteredSubOptions\n });\n }\n }\n\n this.optionsToDisplay = filteredGroups;\n }\n else {\n this.optionsToDisplay = FilterUtils.filter(this.options, searchFields, this.filterValue, this.filterMatchMode, this.filterLocale);\n }\n\n this.optionsChanged = true;\n }\n }\n\n applyFocus(): void {\n if (this.editable)\n DomHandler.findSingle(this.el.nativeElement, '.ui-dropdown-label.ui-inputtext').focus();\n else\n DomHandler.findSingle(this.el.nativeElement, 'input[readonly]').focus();\n }\n\n focus(): void {\n this.applyFocus();\n }\n\n bindDocumentClickListener() {\n if (!this.documentClickListener) {\n this.documentClickListener = this.renderer.listen('document', 'click', (event) => {\n if (!this.selfClick && !this.itemClick) {\n this.hide(event);\n this.unbindDocumentClickListener();\n }\n\n this.clearClickState();\n this.cd.markForCheck();\n });\n }\n }\n\n clearClickState() {\n this.selfClick = false;\n this.itemClick = false;\n }\n\n unbindDocumentClickListener() {\n if (this.documentClickListener) {\n this.documentClickListener();\n this.documentClickListener = null;\n }\n }\n\n bindDocumentResizeListener() {\n this.documentResizeListener = this.onWindowResize.bind(this);\n window.addEventListener('resize', this.documentResizeListener);\n }\n\n unbindDocumentResizeListener() {\n if (this.documentResizeListener) {\n window.removeEventListener('resize', this.documentResizeListener);\n this.documentResizeListener = null;\n }\n }\n\n onWindowResize() {\n if (!DomHandler.isAndroid()) {\n this.hide(event);\n }\n }\n\n updateFilledState() {\n this.filled = (this.selectedOption != null);\n }\n\n clear(event: Event) {\n this.clearClick = true;\n this.value = null;\n this.onModelChange(this.value);\n this.onChange.emit({\n originalEvent: event,\n value: this.value\n });\n this.updateSelectedOption(this.value);\n this.updateEditableLabel();\n this.updateFilledState();\n }\n\n onOverlayHide() {\n this.unbindDocumentClickListener();\n this.unbindDocumentResizeListener();\n this.overlay = null;\n this.itemsWrapper = null;\n this.onModelTouched();\n }\n\n ngOnDestroy() {\n this.restoreOverlayAppend();\n this.onOverlayHide();\n }\n}\n\n@NgModule({\n imports: [CommonModule,SharedModule,ScrollingModule,TooltipModule],\n exports: [Dropdown,SharedModule,ScrollingModule],\n declarations: [Dropdown,DropdownItem]\n})\nexport class DropdownModule { }\n"]} |