Implement the modal style popover

index.html

@@ -292,7 +292,7 @@ npm install driver.js</pre
         }, 2000);
 
         window.setTimeout(() => {
-          driverObj.highlight({ element: ".buttons button:nth-child(5)" });
+          driverObj.highlight({});
         }, 4000);
 
         window.setTimeout(() => {

src/config.ts

@@ -5,6 +5,7 @@ export type Config = {
   opacity?: number;
   stagePadding?: number;
   stageRadius?: number;
+  popoverOffset?: number;
 };
 
 let currentConfig: Config = {};
@@ -17,6 +18,7 @@ export function configure(config: Config = {}) {
     smoothScroll: false,
     stagePadding: 10,
     stageRadius: 5,
+    popoverOffset: 10,
     ...config,
   };
 }

src/driver.ts

@@ -6,14 +6,13 @@ import { destroyHighlight, highlight } from "./highlight";
 import { destroyEmitter, listen } from "./emitter";
 
 import "./style.css";
+import { getState, setState } from "./state";
 
 export type DriveStep = {
   element?: string | Element;
   popover?: Popover;
 };
 
-let isInitialized = false;
-
 export function driver(options: Config = {}) {
   configure(options);
 
@@ -26,15 +25,12 @@ export function driver(options: Config = {}) {
   }
 
   function init() {
-    if (isInitialized) {
+    if (getState("isInitialized")) {
       return;
     }
 
-    isInitialized = true;
-    document.body.classList.add(
-      "driver-active",
-      getConfig("animate") ? "driver-fade" : "driver-simple"
-    );
+    setState("isInitialized", true);
+    document.body.classList.add("driver-active", getConfig("animate") ? "driver-fade" : "driver-simple");
 
     initEvents();
 
@@ -44,11 +40,9 @@ export function driver(options: Config = {}) {
   }
 
   function destroy() {
-    isInitialized = false;
-    document.body.classList.remove(
-      "driver-active",
-      getConfig("animate") ? "driver-fade" : "driver-simple"
-    );
+    setState("isInitialized", false);
+
+    document.body.classList.remove("driver-active", "driver-fade", "driver-simple");
 
     destroyEvents();
     destroyPopover();
@@ -57,7 +51,6 @@ export function driver(options: Config = {}) {
     destroyEmitter();
   }
 
-  // @todo make popover selectable
   return {
     drive: (steps: DriveStep[]) => console.log(steps),
     highlight: (step: DriveStep) => {

src/events.ts

@@ -1,14 +1,14 @@
 import { refreshActiveHighlight } from "./highlight";
 import { emit } from "./emitter";
-
-let resizeTimeout: number;
+import { getState, setState } from "./state";
 
 function requireRefresh() {
+  const resizeTimeout = getState("resizeTimeout");
   if (resizeTimeout) {
     window.cancelAnimationFrame(resizeTimeout);
   }
 
-  resizeTimeout = window.requestAnimationFrame(refreshActiveHighlight);
+  setState("resizeTimeout", window.requestAnimationFrame(refreshActiveHighlight));
 }
 
 function onKeyup(e: KeyboardEvent) {
@@ -32,10 +32,7 @@ export function onDriverClick(
   listener: (pointer: MouseEvent | PointerEvent) => void,
   shouldPreventDefault?: (target: HTMLElement) => boolean
 ) {
-  const listenerWrapper = (
-    e: MouseEvent | PointerEvent,
-    listener?: (pointer: MouseEvent | PointerEvent) => void
-  ) => {
+  const listenerWrapper = (e: MouseEvent | PointerEvent, listener?: (pointer: MouseEvent | PointerEvent) => void) => {
     const target = e.target as HTMLElement;
     if (!element.contains(target)) {
       return;

src/highlight.ts

@@ -3,10 +3,7 @@ import { refreshStage, trackActiveElement, transitionStage } from "./stage";
 import { getConfig } from "./config";
 import { repositionPopover, renderPopover, hidePopover } from "./popover";
 import { bringInView } from "./utils";
-
-let previousHighlight: Element | undefined;
-let activeHighlight: Element | undefined;
-let currentTransitionCallback: undefined | (() => void);
+import { getState, setState } from "./state";
 
 function mountDummyElement(): Element {
   const existingDummy = document.getElementById("driver-dummy-element");
@@ -38,13 +35,19 @@ export function highlight(step: DriveStep) {
     elemObj = mountDummyElement();
   }
 
-  previousHighlight = activeHighlight;
-  activeHighlight = elemObj;
+  const previousHighlight = getState("activeHighlight");
+
+  const transferHighlightFrom = previousHighlight || elemObj;
+  const transferHighlightTo = elemObj;
+
+  transferHighlight(transferHighlightFrom, transferHighlightTo);
 
-  transferHighlight(previousHighlight || elemObj, elemObj);
+  setState("previousHighlight", transferHighlightFrom);
+  setState("activeHighlight", transferHighlightTo);
 }
 
 export function refreshActiveHighlight() {
+  const activeHighlight = getState("activeHighlight");
   if (!activeHighlight) {
     return;
   }
@@ -61,15 +64,17 @@ function transferHighlight(from: Element, to: Element) {
   // If it's the first time we're highlighting an element, we show
   // the popover immediately. Otherwise, we wait for the animation
   // to finish before showing the popover.
-  const hasDelayedPopover = !from || from !== to;
+  const hasDelayedPopover = to && (!from || from !== to);
 
   hidePopover();
 
   const animate = () => {
+    const transitionCallback = getState("transitionCallback");
+
     // This makes sure that the repeated calls to transferHighlight
     // don't interfere with each other. Only the last call will be
     // executed.
-    if (currentTransitionCallback !== animate) {
+    if (transitionCallback !== animate) {
       return;
     }
 
@@ -84,13 +89,13 @@ function transferHighlight(from: Element, to: Element) {
         renderPopover(to);
       }
 
-      currentTransitionCallback = undefined;
+      setState("transitionCallback", undefined);
     }
 
     window.requestAnimationFrame(animate);
   };
 
-  currentTransitionCallback = animate;
+  setState("transitionCallback", animate);
   window.requestAnimationFrame(animate);
 
   bringInView(to);
@@ -103,10 +108,11 @@ function transferHighlight(from: Element, to: Element) {
 }
 
 export function destroyHighlight() {
-  activeHighlight = undefined;
-  currentTransitionCallback = undefined;
-  previousHighlight = undefined;
-  activeHighlight = undefined;
+  setState("activeHighlight", undefined);
+  setState("previousHighlight", undefined);
+
+  setState("transitionCallback", undefined);
+
   document.getElementById("driver-dummy-element")?.remove();
 
   document.querySelectorAll(".driver-active-element").forEach(element => {

src/popover.ts

@@ -1,11 +1,10 @@
 import { bringInView } from "./utils";
 import { getConfig } from "./config";
+import { getState, setState } from "./state";
 
-export type Side = "top" | "right" | "bottom" | "left";
+export type Side = "top" | "right" | "bottom" | "left" | "over";
 export type Alignment = "start" | "center" | "end";
 
-const POPOVER_OFFSET = 10;
-
 export type Popover = {
   title?: string;
   description: string;
@@ -13,7 +12,7 @@ export type Popover = {
   align?: Alignment;
 };
 
-type PopoverDOM = {
+export type PopoverDOM = {
   wrapper: HTMLElement;
   arrow: HTMLElement;
   title: HTMLElement;
@@ -25,9 +24,8 @@ type PopoverDOM = {
   footerButtons: HTMLElement;
 };
 
-let popover: PopoverDOM | undefined;
-
 export function hidePopover() {
+  const popover = getState("popover");
   if (!popover) {
     return;
   }
@@ -36,6 +34,7 @@ export function hidePopover() {
 }
 
 export function renderPopover(element: Element) {
+  let popover = getState("popover");
   if (!popover) {
     popover = createPopover();
     document.body.appendChild(popover.wrapper);
@@ -53,6 +52,8 @@ export function renderPopover(element: Element) {
   const popoverArrow = popover.arrow;
   popoverArrow.className = "driver-popover-arrow";
 
+  setState("popover", popover);
+
   repositionPopover(element);
   bringInView(popoverWrapper);
 }
@@ -65,16 +66,19 @@ type PopoverDimensions = {
 };
 
 function getPopoverDimensions(): PopoverDimensions | undefined {
+  const popover = getState("popover");
   if (!popover?.wrapper) {
     return;
   }
 
   const boundingClientRect = popover.wrapper.getBoundingClientRect();
+
   const stagePadding = getConfig("stagePadding") || 0;
+  const popoverOffset = getConfig("popoverOffset") || 0;
 
   return {
-    width: boundingClientRect.width + stagePadding + POPOVER_OFFSET,
-    height: boundingClientRect.height + stagePadding + POPOVER_OFFSET,
+    width: boundingClientRect.width + stagePadding + popoverOffset,
+    height: boundingClientRect.height + stagePadding + popoverOffset,
 
     realWidth: boundingClientRect.width,
     realHeight: boundingClientRect.height,
@@ -171,6 +175,7 @@ function calculateLeftForTopBottom(
 }
 
 export function repositionPopover(element: Element) {
+  const popover = getState("popover");
   if (!popover) {
     return;
   }
@@ -178,7 +183,7 @@ export function repositionPopover(element: Element) {
   // @TODO These values will come from the config
   // Configure the popover positioning
   const requiredAlignment: Alignment = "start";
-  const requiredSide: Side = "left" as Side;
+  const requiredSide: Side = element.id === "driver-dummy-element" ? "over" : "left" as Side;
   const popoverPadding = getConfig('stagePadding') || 0;
 
   const popoverDimensions = getPopoverDimensions()!;
@@ -210,7 +215,15 @@ export function repositionPopover(element: Element) {
     isLeftOptimal = isTopOptimal = isBottomOptimal = false;
   }
 
-  if (noneOptimal) {
+  if (requiredSide === "over") {
+    const leftToSet = window.innerWidth / 2 - popoverDimensions!.realWidth / 2;
+    const topToSet = window.innerHeight / 2 - popoverDimensions!.realHeight / 2;
+
+    popover.wrapper.style.left = `${leftToSet}px`;
+    popover.wrapper.style.right = `auto`;
+    popover.wrapper.style.top = `${topToSet}px`;
+    popover.wrapper.style.bottom = `auto`;
+  } else if (noneOptimal) {
     const leftValue = window.innerWidth / 2 - popoverDimensions?.realWidth! / 2;
     const bottomValue = 10;
 
@@ -303,6 +316,7 @@ export function repositionPopover(element: Element) {
 }
 
 function renderPopoverArrow(alignment: Alignment, side: Side, element: Element) {
+  const popover = getState("popover");
   if (!popover) {
     return;
   }
@@ -458,10 +472,11 @@ function createPopover(): PopoverDOM {
 }
 
 export function destroyPopover() {
+  const popover = getState("popover");
   if (!popover) {
     return;
   }
 
   popover.wrapper.parentElement?.removeChild(popover.wrapper);
-  popover = undefined;
+  setState("popover", undefined);
 }

src/stage.ts

@@ -2,6 +2,7 @@ import { easeInOutQuad } from "./utils";
 import { onDriverClick } from "./events";
 import { emit } from "./emitter";
 import { getConfig } from "./config";
+import { getState, setState } from "./state";
 
 export type StageDefinition = {
   x: number;
@@ -10,14 +11,12 @@ export type StageDefinition = {
   height: number;
 };
 
-let activeStagePosition: StageDefinition | undefined;
-let stageSvg: SVGSVGElement | undefined;
-
 // This method calculates the animated new position of the
 // stage (called for each frame by requestAnimationFrame)
 export function transitionStage(elapsed: number, duration: number, from: Element, to: Element) {
-  const fromDefinition = activeStagePosition ? activeStagePosition : from.getBoundingClientRect();
+  let activeStagePosition = getState("activeStagePosition");
 
+  const fromDefinition = activeStagePosition ? activeStagePosition : from.getBoundingClientRect();
   const toDefinition = to.getBoundingClientRect();
 
   const x = easeInOutQuad(elapsed, fromDefinition.x, toDefinition.x - fromDefinition.x, duration);
@@ -33,6 +32,7 @@ export function transitionStage(elapsed: number, duration: number, from: Element
   };
 
   renderStage(activeStagePosition);
+  setState("activeStagePosition", activeStagePosition);
 }
 
 export function trackActiveElement(element: Element) {
@@ -42,17 +42,22 @@ export function trackActiveElement(element: Element) {
 
   const definition = element.getBoundingClientRect();
 
-  activeStagePosition = {
+  const activeStagePosition: StageDefinition = {
     x: definition.x,
     y: definition.y,
     width: definition.width,
     height: definition.height,
   };
 
+  setState("activeStagePosition", activeStagePosition);
+
   renderStage(activeStagePosition);
 }
 
 export function refreshStage() {
+  const activeStagePosition = getState("activeStagePosition");
+  const stageSvg = getState("stageSvg");
+
   if (!activeStagePosition) {
     return;
   }
@@ -69,7 +74,7 @@ export function refreshStage() {
 }
 
 function mountStage(stagePosition: StageDefinition) {
-  stageSvg = createStageSvg(stagePosition);
+  const stageSvg = createStageSvg(stagePosition);
   document.body.appendChild(stageSvg);
 
   onDriverClick(stageSvg, e => {
@@ -80,9 +85,13 @@ function mountStage(stagePosition: StageDefinition) {
 
     emit("overlayClick");
   });
+
+  setState("stageSvg", stageSvg);
 }
 
 function renderStage(stagePosition: StageDefinition) {
+  const stageSvg = getState("stageSvg");
+
   // TODO: cancel rendering if element is not visible
   if (!stageSvg) {
     mountStage(stagePosition);
@@ -95,7 +104,7 @@ function renderStage(stagePosition: StageDefinition) {
     throw new Error("no path element found in stage svg");
   }
 
-  pathElement.setAttribute("d", generateSvgCutoutPathString(stagePosition));
+  pathElement.setAttribute("d", generateStageSvgPathString(stagePosition));
 }
 
 function createStageSvg(stage: StageDefinition): SVGSVGElement {
@@ -122,26 +131,26 @@ function createStageSvg(stage: StageDefinition): SVGSVGElement {
   svg.style.width = "100%";
   svg.style.height = "100%";
 
-  const cutoutPath = document.createElementNS("http://www.w3.org/2000/svg", "path");
+  const stagePath = document.createElementNS("http://www.w3.org/2000/svg", "path");
 
-  cutoutPath.setAttribute("d", generateSvgCutoutPathString(stage));
+  stagePath.setAttribute("d", generateStageSvgPathString(stage));
 
-  cutoutPath.style.fill = "rgb(0,0,0)";
-  cutoutPath.style.opacity = `${getConfig("opacity")}`;
-  cutoutPath.style.pointerEvents = "auto";
-  cutoutPath.style.cursor = "auto";
+  stagePath.style.fill = "rgb(0,0,0)";
+  stagePath.style.opacity = `${getConfig("opacity")}`;
+  stagePath.style.pointerEvents = "auto";
+  stagePath.style.cursor = "auto";
 
-  svg.appendChild(cutoutPath);
+  svg.appendChild(stagePath);
 
   return svg;
 }
 
-function generateSvgCutoutPathString(stage: StageDefinition) {
+function generateStageSvgPathString(stage: StageDefinition) {
   const windowX = window.innerWidth;
   const windowY = window.innerHeight;
 
-  const stagePadding = getConfig('stagePadding') || 0;
-  const stageRadius = getConfig('stageRadius') || 0;
+  const stagePadding = getConfig("stagePadding") || 0;
+  const stageRadius = getConfig("stageRadius") || 0;
 
   const stageWidth = stage.width + stagePadding * 2;
   const stageHeight = stage.height + stagePadding * 2;
@@ -162,10 +171,11 @@ function generateSvgCutoutPathString(stage: StageDefinition) {
 }
 
 export function destroyStage() {
+  const stageSvg = getState("stageSvg");
   if (stageSvg) {
     stageSvg.remove();
-    stageSvg = undefined;
+    setState("stageSvg", undefined);
   }
 
-  activeStagePosition = undefined;
+  setState("activeStagePosition", undefined);
 }

src/state.ts

@@ -0,0 +1,28 @@
+import { StageDefinition } from "./stage";
+import { PopoverDOM } from "./popover";
+
+export type State = {
+  isInitialized?: boolean;
+  resizeTimeout?: number;
+
+  previousHighlight?: Element;
+  activeHighlight?: Element;
+  transitionCallback?: () => void;
+
+  activeStagePosition?: StageDefinition;
+  stageSvg?: SVGSVGElement;
+
+  popover?: PopoverDOM;
+};
+
+let currentState: State = {};
+
+export function setState<K extends keyof State>(key: K, value: State[K]) {
+  currentState[key] = value;
+}
+
+export function getState(): State;
+export function getState<K extends keyof State>(key: K): State[K];
+export function getState<K extends keyof State>(key?: K) {
+  return key ? currentState[key] : currentState;
+}

src/style.css

@@ -8,7 +8,8 @@
 
 .driver-active .driver-active-element,
 .driver-active .driver-active-element *,
-.driver-popover, .driver-popover *{
+.driver-popover,
+.driver-popover * {
   pointer-events: auto;
 }
 
@@ -51,6 +52,10 @@
   border: 5px solid #fff;
 }
 
+.driver-popover-arrow-side-over {
+  display: none;
+}
+
 /** Popover Arrow Sides **/
 .driver-popover-arrow-side-left {
   left: 100%;