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-rw-r--r--browser/components/shell/ScreenshotChild.jsm35
1 files changed, 35 insertions, 0 deletions
diff --git a/browser/components/shell/ScreenshotChild.jsm b/browser/components/shell/ScreenshotChild.jsm
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+++ b/browser/components/shell/ScreenshotChild.jsm
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const EXPORTED_SYMBOLS = ["ScreenshotChild"];
+
+class ScreenshotChild extends JSWindowActorChild {
+ receiveMessage(message) {
+ if (message.name == "GetDimensions") {
+ return this.getDimensions();
+ }
+ return null;
+ }
+
+ async getDimensions() {
+ if (this.document.readyState != "complete") {
+ await new Promise(resolve =>
+ this.contentWindow.addEventListener("load", resolve, { once: true })
+ );
+ }
+
+ let { contentWindow } = this;
+
+ return {
+ innerWidth: contentWindow.innerWidth,
+ innerHeight: contentWindow.innerHeight,
+ scrollMinX: contentWindow.scrollMinX,
+ scrollMaxX: contentWindow.scrollMaxX,
+ scrollMinY: contentWindow.scrollMinY,
+ scrollMaxY: contentWindow.scrollMaxY,
+ };
+ }
+}