forked from mirrors/gecko-dev
47 lines
1.5 KiB
JavaScript
47 lines
1.5 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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import {
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getBestRectForElement,
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getElementFromPoint,
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} from "chrome://browser/content/screenshots/overlayHelpers.mjs";
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/**
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* This class is used to get the dimensions of hovered elements within iframes.
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* The main content process cannot get the dimensions of elements within
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* iframes so a message will be send to this actor to get the dimensions of the
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* element for a given point inside the iframe.
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*/
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export class ScreenshotsHelperChild extends JSWindowActorChild {
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receiveMessage(message) {
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if (message.name === "ScreenshotsHelper:GetElementRectFromPoint") {
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return this.getBestElementRectFromPoint(message.data);
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}
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return null;
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}
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async getBestElementRectFromPoint(data) {
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let { x, y } = data;
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x -= this.contentWindow.mozInnerScreenX;
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y -= this.contentWindow.mozInnerScreenY;
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let { ele, rect } = await getElementFromPoint(x, y, this.document);
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if (!rect) {
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rect = getBestRectForElement(ele, this.document);
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}
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if (rect) {
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rect = {
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left: rect.left + this.contentWindow.mozInnerScreenX,
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right: rect.right + this.contentWindow.mozInnerScreenX,
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top: rect.top + this.contentWindow.mozInnerScreenY,
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bottom: rect.bottom + this.contentWindow.mozInnerScreenY,
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};
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}
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return rect;
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}
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}
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