tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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ScreenshotsHelperChild.sys.mjs (1509B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 import {
      6  getBestRectForElement,
      7  getElementFromPoint,
      8 } from "chrome://browser/content/screenshots/overlayHelpers.mjs";
      9 
     10 /**
     11 * This class is used to get the dimensions of hovered elements within iframes.
     12 * The main content process cannot get the dimensions of elements within
     13 * iframes so a message will be send to this actor to get the dimensions of the
     14 * element for a given point inside the iframe.
     15 */
     16 export class ScreenshotsHelperChild extends JSWindowActorChild {
     17  receiveMessage(message) {
     18    if (message.name === "ScreenshotsHelper:GetElementRectFromPoint") {
     19      return this.getBestElementRectFromPoint(message.data);
     20    }
     21    return null;
     22  }
     23 
     24  async getBestElementRectFromPoint(data) {
     25    let { x, y } = data;
     26 
     27    x -= this.contentWindow.mozInnerScreenX;
     28    y -= this.contentWindow.mozInnerScreenY;
     29 
     30    let { ele, rect } = await getElementFromPoint(x, y, this.document);
     31 
     32    if (!rect) {
     33      rect = getBestRectForElement(ele, this.document);
     34    }
     35 
     36    if (rect) {
     37      rect = {
     38        left: rect.left + this.contentWindow.mozInnerScreenX,
     39        right: rect.right + this.contentWindow.mozInnerScreenX,
     40        top: rect.top + this.contentWindow.mozInnerScreenY,
     41        bottom: rect.bottom + this.contentWindow.mozInnerScreenY,
     42      };
     43    }
     44 
     45    return rect;
     46  }
     47 }