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+import {Directive, ElementRef, HostListener, Input, OnInit, Renderer, TemplateRef} from "@angular/core";
+import {CreateDynamicComponentService} from "../customModal/services/create-dynamic-component.service";
+import {TooltipTemplateComponent} from "./custom-tooltip.component";
+
+const pixel = 'px';
+const leftStyle = 'left';
+const topStyle = 'top';
+const showSuffix = 'show';
+const rightBottomSuffix = 'right__bottom';
+const centerMiddleSuffix = 'center__middle';
+
+@Directive({
+ selector: '[custom-tooltip]'
+})
+export class TooltipDirective implements OnInit {
+ @Input('tooltip-text') public text;
+ @Input('tooltip-placement') public placement: TooltipPlacement = TooltipPlacement.Top;
+ @Input('tooltip-css-class') public customCssClass: string;
+ @Input('tooltip-template') public template: TemplateRef<any>;
+ @Input('tooltip-arrow-offset') public arrowOffset: number = 10;
+ @Input('tooltip-arrow-placement') public arrowPlacement: ArrowPlacement = ArrowPlacement.LeftTop;
+ @Input('tooltip-offset') public tooltipOffset: number = 3;
+
+ private cssClass: string = 'sdc-tooltip'; // default css class
+ private tooltip: any; // tooltip html element
+ private elemPosition: any;
+ private tooltipTemplateContainer: any;
+
+ private scrollEventHandler = () => {};
+
+ constructor(
+ private elementRef: ElementRef,
+ private service: CreateDynamicComponentService,
+ private renderer: Renderer) {
+
+ this.elementRef.nativeElement.title = "";
+ }
+
+ @HostListener('mouseenter')
+ public onMouseEnter() {
+ this.show();
+ this.activateScrollEvent();
+ }
+
+ @HostListener('mouseleave')
+ public onMouseLeave() {
+ this.hide();
+ this.deactivateScrollEvent();
+ }
+
+ ngOnInit(): void {
+ this.initScrollEvent();
+ }
+
+ private get ScreenWidth() {
+ return document.documentElement.clientWidth;
+ }
+
+ private get ScreenHeight() {
+ return document.documentElement.clientHeight;
+ }
+
+ private create() {
+ this.tooltipTemplateContainer = this.service.createComponentDynamically(TooltipTemplateComponent, document.body);
+
+ /**
+ * Creating a view (injecting our template) from template in our component.
+ */
+ this.tooltip = this.tooltipTemplateContainer.location.nativeElement.querySelector(
+ '.sdc-tooltip-template-container');
+
+ if (this.template) {
+ this.tooltipTemplateContainer.instance.container.createEmbeddedView(this.template);
+ } else if(this.text) {
+ this.tooltip.textContent = this.text;
+ } else {
+ this.tooltip = undefined;
+ }
+
+ this.setCssClass(true);
+ }
+
+ private destroy() {
+ this.tooltipTemplateContainer.destroy();
+ this.tooltip = null;
+ }
+
+ private show() {
+ this.create();
+
+ /**
+ * View is ready (AfterViewInit event in template component)
+ */
+ this.tooltipTemplateContainer.instance.viewReady.subscribe((isReady) => {
+ if (isReady) {
+ this.setPosition();
+ this.toggleShowCssClass(true); // add css class
+ }
+ });
+ }
+
+ private hide() {
+ this.toggleShowCssClass(false); // remove css class
+
+ this.destroy();
+ }
+
+ private toggleShowCssClass(isAdd: boolean) {
+ if (this.tooltip) {
+ this.setCssClass(isAdd, '-' + showSuffix);
+ }
+ }
+
+ /**
+ * Adds placement css class and sets tooltip position in style
+ */
+ private setPosition() {
+ const tooltipPos: IPlacementData = this.getPlacementData();
+
+ const placementSuffix: string = TooltipPlacement[tooltipPos.placement].toLowerCase();
+
+ this.setCssClass(true, '-' + placementSuffix);
+
+ this.setAdditionalCssClass(placementSuffix);
+
+ this.renderer.setElementStyle(this.tooltip, topStyle, tooltipPos.top + pixel);
+ this.renderer.setElementStyle(this.tooltip, leftStyle, tooltipPos.left + pixel);
+ }
+
+ private setAdditionalCssClass(placementSuffix: string) {
+ if (this.arrowPlacement === ArrowPlacement.RightBottom) {
+ this.setCssClass(true, '-' + placementSuffix + '-' + rightBottomSuffix);
+ } else if (this.arrowPlacement === ArrowPlacement.CenterMiddle) {
+ this.setCssClass(true, '-' + placementSuffix + '-' + centerMiddleSuffix);
+ }
+ }
+
+ private setCssClass(isAdd: boolean, suffix: string = '') {
+ this.renderer.setElementClass(this.tooltip, this.cssClass + suffix, isAdd);
+
+ if (this.customCssClass) {
+ this.renderer.setElementClass(this.tooltip, this.customCssClass + suffix, isAdd);
+ }
+ }
+
+ /**
+ * Checks the specified placement (first element in array), if it is not valid - checks other placements
+ * @returns {IPlacementData}
+ */
+ private getPlacementData(): IPlacementData {
+ const placement: TooltipPlacement = this.placement;
+ let tooltipPos: IPlacementData;
+
+ const tooltipPosWithPlacement = this.getPlacement.bind(this, placement);
+
+ // TODO add comments - done
+ switch (placement) {
+ case TooltipPlacement.Left:
+ tooltipPos = tooltipPosWithPlacement(
+ TooltipPlacement.Right,
+ TooltipPlacement.Top,
+ TooltipPlacement.Bottom);
+ break;
+
+ case TooltipPlacement.Right:
+ tooltipPos = tooltipPosWithPlacement(
+ TooltipPlacement.Left,
+ TooltipPlacement.Top,
+ TooltipPlacement.Bottom);
+ break;
+
+ case TooltipPlacement.Top:
+ tooltipPos = tooltipPosWithPlacement(
+ TooltipPlacement.Bottom,
+ TooltipPlacement.Left,
+ TooltipPlacement.Right);
+ break;
+
+ case TooltipPlacement.Bottom:
+ tooltipPos = tooltipPosWithPlacement(
+ TooltipPlacement.Top,
+ TooltipPlacement.Left,
+ TooltipPlacement.Right);
+ break;
+ }
+
+ return tooltipPos;
+ }
+
+ /**
+ * Returns valid tooltip position data
+ * @param {TooltipPlacement} placement
+ * @param {TooltipPlacement} additionalPlacements
+ * @returns {IPlacementData}
+ */
+ private getPlacement(placement: TooltipPlacement,
+ ...additionalPlacements: TooltipPlacement[]
+ ): IPlacementData {
+ const placements: TooltipPlacement[] = [placement, ...additionalPlacements];
+ const filterPlacements = placements
+ .map((pl) => this.getPosition(pl))
+ .filter((item) => this.validatePosition(item));
+ return filterPlacements.length > 0 ? filterPlacements[0] : this.getPosition(placement);
+ }
+
+ /**
+ * Returns input data for getPosition method
+ * @returns {ITooltipPositionParams}
+ */
+ private getPlacementInputParams(): ITooltipPositionParams {
+ this.elemPosition = this.elementRef.nativeElement.getBoundingClientRect();
+
+ return {
+ elemHeight: this.elementRef.nativeElement.offsetHeight,
+ elemLeft: this.elemPosition.left,
+ elemTop: this.elemPosition.top,
+ elemWidth: this.elementRef.nativeElement.offsetWidth,
+ pageYOffset: window.pageYOffset,
+ tooltipHeight: this.tooltip.offsetHeight, // .clientHeight,
+ tooltipOffset: this.tooltipOffset,
+ tooltipWidth: this.tooltip.offsetWidth,
+ arrowOffset: this.arrowOffset
+ };
+ }
+
+ /**
+ * Returns tooltip position data
+ * @param {TooltipPlacement} placement (left, top, right, bottom)
+ * @returns {IPlacementData}
+ */
+ private getPosition(placement: TooltipPlacement): IPlacementData {
+ switch(this.arrowPlacement) {
+ case ArrowPlacement.LeftTop:
+ return this.getLeftTopPosition(placement);
+
+ case ArrowPlacement.RightBottom:
+ return this.getRightBottomPosition(placement);
+ }
+
+ return this.getCenterMiddlePosition(placement);
+ }
+
+ /**
+ * Returns tooltip position data (center / middle arrow)
+ * @param {TooltipPlacement} placement (left, top, right, bottom)
+ * @returns {IPlacementData}
+ */
+ private getCenterMiddlePosition(placement: TooltipPlacement): IPlacementData {
+ let left = 0;
+ let top = 0;
+
+ const inputPos: ITooltipPositionParams = this.getPlacementInputParams();
+ switch (placement) {
+ case TooltipPlacement.Left:
+ left = inputPos.elemLeft - inputPos.tooltipWidth - inputPos.tooltipOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight / 2 - inputPos.tooltipHeight / 2;
+ break;
+
+ case TooltipPlacement.Right:
+ left = inputPos.elemLeft + inputPos.elemWidth + inputPos.tooltipOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight / 2 - inputPos.tooltipHeight / 2;
+ break;
+
+ case TooltipPlacement.Top:
+ left = inputPos.elemLeft + inputPos.elemWidth / 2 - inputPos.tooltipWidth / 2;
+ top = inputPos.elemTop + inputPos.pageYOffset - inputPos.tooltipHeight - inputPos.tooltipOffset;
+ break;
+
+ case TooltipPlacement.Bottom:
+ left = inputPos.elemLeft + inputPos.elemWidth / 2 - inputPos.tooltipWidth / 2;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight + inputPos.tooltipOffset;
+ break;
+ }
+
+ return {
+ height: inputPos.tooltipHeight,
+ left,
+ placement,
+ top,
+ width: inputPos.tooltipWidth,
+ pageYOffset: inputPos.pageYOffset
+ } as IPlacementData;
+ }
+
+ /**
+ * Returns tooltip position data (left / top arrow)
+ * @param {TooltipPlacement} placement (left, top, right, bottom)
+ * @returns {IPlacementData}
+ */
+ private getLeftTopPosition(placement: TooltipPlacement): IPlacementData {
+ let left = 0;
+ let top = 0;
+
+ const inputPos: ITooltipPositionParams = this.getPlacementInputParams();
+ switch (placement) {
+ case TooltipPlacement.Left:
+ left = inputPos.elemLeft - inputPos.tooltipWidth - inputPos.tooltipOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight / 2 - inputPos.arrowOffset;
+ break;
+
+ case TooltipPlacement.Right:
+ left = inputPos.elemLeft + inputPos.elemWidth + inputPos.tooltipOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight / 2 - inputPos.arrowOffset;
+ break;
+
+ case TooltipPlacement.Top:
+ left = inputPos.elemLeft + inputPos.elemWidth / 2 - inputPos.arrowOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset - inputPos.tooltipHeight - inputPos.tooltipOffset;
+ break;
+
+ case TooltipPlacement.Bottom:
+ left = inputPos.elemLeft + inputPos.elemWidth / 2 - inputPos.arrowOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight + inputPos.tooltipOffset;
+ break;
+ }
+
+ return {
+ height: inputPos.tooltipHeight,
+ left,
+ placement,
+ top,
+ width: inputPos.tooltipWidth,
+ pageYOffset: inputPos.pageYOffset
+ } as IPlacementData;
+ }
+
+ /**
+ * Returns tooltip position data (right / bottom arrow)
+ * @param {TooltipPlacement} placement (left, top, right, bottom)
+ * @returns {IPlacementData}
+ */
+ private getRightBottomPosition(placement: TooltipPlacement): IPlacementData {
+ let left = 0;
+ let top = 0;
+
+ const inputPos: ITooltipPositionParams = this.getPlacementInputParams();
+ switch (placement) {
+ case TooltipPlacement.Left:
+ left = inputPos.elemLeft - inputPos.tooltipWidth - inputPos.tooltipOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight / 2 - inputPos.tooltipHeight + inputPos.arrowOffset;
+ break;
+
+ case TooltipPlacement.Right:
+ left = inputPos.elemLeft + inputPos.elemWidth + inputPos.tooltipOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight / 2 - inputPos.tooltipHeight + inputPos.arrowOffset;
+ break;
+
+ case TooltipPlacement.Top:
+ left = inputPos.elemLeft + inputPos.elemWidth / 2 - inputPos.tooltipWidth + inputPos.arrowOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset - inputPos.tooltipHeight - inputPos.tooltipOffset;
+ break;
+
+ case TooltipPlacement.Bottom:
+ left = inputPos.elemLeft + inputPos.elemWidth / 2 - inputPos.tooltipWidth + inputPos.arrowOffset;
+ top = inputPos.elemTop + inputPos.pageYOffset + inputPos.elemHeight + inputPos.tooltipOffset;
+ break;
+ }
+
+ return {
+ height: inputPos.tooltipHeight,
+ left,
+ placement,
+ top,
+ width: inputPos.tooltipWidth,
+ pageYOffset: inputPos.pageYOffset
+ } as IPlacementData;
+ }
+
+ /**
+ * Checks if tooltip position is valid
+ * @param {IPlacementData} pos
+ * @returns {boolean}
+ */
+ private validatePosition(pos: IPlacementData): boolean {
+ if (pos.left < 0 || pos.left + pos.width - 1 > this.ScreenWidth) {
+ return false;
+ }
+
+ if (pos.top - pos.pageYOffset < 0 || pos.top - pos.pageYOffset + pos.height - 1 > this.ScreenHeight) {
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * Scrolling
+ */
+
+ private debounce(func: Function, wait: number, immediate?: boolean) {
+ let timeout;
+ return function() {
+ const context = this;
+ const args = arguments;
+ const later = () => {
+ timeout = null;
+ if (!immediate) {
+ func.apply(context, args);
+ }
+ };
+ const callNow = immediate && !timeout;
+ clearTimeout(timeout);
+ timeout = setTimeout(later, wait);
+ if (callNow) {
+ func.apply(context, args);
+ }
+ };
+ }
+
+ private initScrollEvent() {
+ this.scrollEventHandler = this.debounce(() => {
+ try {
+ this.setPosition();
+ } catch (e) {
+
+ }
+ }, 10);
+ }
+
+ private activateScrollEvent() {
+ window.addEventListener('scroll', this.scrollEventHandler , true);
+ }
+
+ private deactivateScrollEvent() {
+ window.removeEventListener('scroll', this.scrollEventHandler , true);
+ }
+}
+
+export enum TooltipPlacement {
+ Left,
+ Right,
+ Top,
+ Bottom
+}
+
+export enum ArrowPlacement {
+ CenterMiddle,
+ LeftTop,
+ RightBottom
+}
+
+interface ITooltipPositionParams {
+ elemLeft: number;
+ elemTop: number;
+ elemWidth: number;
+ elemHeight: number;
+ tooltipWidth: number;
+ tooltipHeight: number;
+ tooltipOffset: number;
+ pageYOffset: number;
+ arrowOffset: number;
+}
+
+interface IPlacementData {
+ left: number;
+ top: number;
+ width: number;
+ height: number;
+ pageYOffset: number;
+ placement?: TooltipPlacement;
+}