1 files changed, 49 insertions, 34 deletions

diff --git a/src/content/presenters/FollowPresenter.ts b/src/content/presenters/FollowPresenter.ts
index fef8140..8aef819 100644
--- a/src/content/presenters/FollowPresenter.ts
+++ b/src/content/presenters/FollowPresenter.ts
@@ -1,11 +1,18 @@
-import Hint, { InputHint, LinkHint } from './Hint';
-import * as doms from '../../shared/utils/dom';
+import Hint, { InputHint, LinkHint } from "./Hint";
+import * as doms from "../../shared/utils/dom";
 
 const TARGET_SELECTOR = [
-  'a', 'button', 'input', 'textarea', 'area',
-  '[contenteditable=true]', '[contenteditable=""]', '[tabindex]',
-  '[role="button"]', 'summary'
-].join(',');
+  "a",
+  "button",
+  "input",
+  "textarea",
+  "area",
+  "[contenteditable=true]",
+  '[contenteditable=""]',
+  "[tabindex]",
+  '[role="button"]',
+  "summary",
+].join(",");
 
 interface Size {
   width: number;
@@ -21,11 +28,9 @@ const inViewport = (
   win: Window,
   element: Element,
   viewSize: Size,
-  framePosition: Point,
+  framePosition: Point
 ): boolean => {
-  const {
-    top, left, bottom, right
-  } = doms.viewportRect(element);
+  const { top, left, bottom, right } = doms.viewportRect(element);
   const doc = win.document;
   const frameWidth = doc.documentElement.clientWidth;
   const frameHeight = doc.documentElement.clientHeight;
@@ -34,9 +39,12 @@ const inViewport = (
     // out of frame
     return false;
   }
-  if (right + framePosition.x < 0 || bottom + framePosition.y < 0 ||
-      left + framePosition.x > viewSize.width ||
-      top + framePosition.y > viewSize.height) {
+  if (
+    right + framePosition.x < 0 ||
+    bottom + framePosition.y < 0 ||
+    left + framePosition.x > viewSize.width ||
+    top + framePosition.y > viewSize.height
+  ) {
     // out of viewport
     return false;
   }
@@ -47,11 +55,11 @@ const isAriaHiddenOrAriaDisabled = (win: Window, element: Element): boolean => {
   if (!element || win.document.documentElement === element) {
     return false;
   }
-  for (const attr of ['aria-hidden', 'aria-disabled']) {
+  for (const attr of ["aria-hidden", "aria-disabled"]) {
     const value = element.getAttribute(attr);
     if (value !== null) {
       const hidden = value.toLowerCase();
-      if (hidden === '' || hidden === 'true') {
+      if (hidden === "" || hidden === "true") {
         return true;
       }
     }
@@ -88,8 +96,10 @@ export class FollowPresenterImpl implements FollowPresenter {
     const min = Math.min(targets.length, tags.length);
     for (let i = 0; i < min; ++i) {
       const target = targets[i];
-      if (target instanceof HTMLAnchorElement ||
-        target instanceof HTMLAreaElement) {
+      if (
+        target instanceof HTMLAnchorElement ||
+        target instanceof HTMLAreaElement
+      ) {
         this.hints.push(new LinkHint(target, tags[i]));
       } else {
         this.hints.push(new InputHint(target, tags[i]));
@@ -98,35 +108,40 @@ export class FollowPresenterImpl implements FollowPresenter {
   }
 
   filterHints(prefix: string): void {
-    const shown = this.hints.filter(h => h.getTag().startsWith(prefix));
-    const hidden = this.hints.filter(h => !h.getTag().startsWith(prefix));
+    const shown = this.hints.filter((h) => h.getTag().startsWith(prefix));
+    const hidden = this.hints.filter((h) => !h.getTag().startsWith(prefix));
 
-    shown.forEach(h => h.show());
-    hidden.forEach(h => h.hide());
+    shown.forEach((h) => h.show());
+    hidden.forEach((h) => h.hide());
   }
 
   clearHints(): void {
-    this.hints.forEach(h => h.remove());
+    this.hints.forEach((h) => h.remove());
     this.hints = [];
   }
 
   getHint(tag: string): Hint | undefined {
-    return this.hints.find(h => h.getTag() === tag);
+    return this.hints.find((h) => h.getTag() === tag);
   }
 
   private getTargets(viewSize: Size, framePosition: Point): HTMLElement[] {
     const all = window.document.querySelectorAll(TARGET_SELECTOR);
-    const filtered = Array.prototype.filter.call(all, (element: HTMLElement) => {
-      const style = window.getComputedStyle(element);
-
-      // AREA's 'display' in Browser style is 'none'
-      return (element.tagName === 'AREA' || style.display !== 'none') &&
-        style.visibility !== 'hidden' &&
-        (element as HTMLInputElement).type !== 'hidden' &&
-        element.offsetHeight > 0 &&
-        !isAriaHiddenOrAriaDisabled(window, element) &&
-        inViewport(window, element, viewSize, framePosition);
-    });
+    const filtered = Array.prototype.filter.call(
+      all,
+      (element: HTMLElement) => {
+        const style = window.getComputedStyle(element);
+
+        // AREA's 'display' in Browser style is 'none'
+        return (
+          (element.tagName === "AREA" || style.display !== "none") &&
+          style.visibility !== "hidden" &&
+          (element as HTMLInputElement).type !== "hidden" &&
+          element.offsetHeight > 0 &&
+          !isAriaHiddenOrAriaDisabled(window, element) &&
+          inViewport(window, element, viewSize, framePosition)
+        );
+      }
+    );
     return filtered;
   }
 }