diff --git a/ext/js/accessibility/google-docs-util.js b/ext/js/accessibility/google-docs-util.js
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+++ b/ext/js/accessibility/google-docs-util.js
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2022 Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+/* global
+ * DocumentUtil
+ * TextSourceRange
+ */
+
+/**
+ * This class is a helper for handling Google Docs content in content scripts.
+ */
+class GoogleDocsUtil {
+ /**
+ * Scans the document for text or elements with text information at the given coordinate.
+ * Coordinates are provided in [client space](https://developer.mozilla.org/en-US/docs/Web/CSS/CSSOM_View/Coordinate_systems).
+ * @param {number} x The x coordinate to search at.
+ * @param {number} y The y coordinate to search at.
+ * @param {GetRangeFromPointOptions} options Options to configure how element detection is performed.
+ * @returns {?TextSourceRange|TextSourceElement} A range for the hovered text or element, or `null` if no applicable content was found.
+ */
+ static getRangeFromPoint(x, y, {normalizeCssZoom}) {
+ const selector = '.kix-canvas-tile-content svg>g>rect';
+ const styleNode = this._getStyleNode(selector);
+ styleNode.disabled = false;
+ const elements = document.elementsFromPoint(x, y);
+ styleNode.disabled = true;
+ for (const element of elements) {
+ if (!element.matches(selector)) { continue; }
+ const ariaLabel = element.getAttribute('aria-label');
+ if (typeof ariaLabel !== 'string' || ariaLabel.length === 0) { continue; }
+ return this._createRange(element, ariaLabel, x, y, normalizeCssZoom);
+ }
+ return null;
+ }
+
+ static _getStyleNode(selector) {
+ // This