1 files changed, 163 insertions, 0 deletions
diff --git a/mobile/android/actors/ContentDelegateChild.sys.mjs b/mobile/android/actors/ContentDelegateChild.sys.mjs
new file mode 100644
index 0000000000..9d1a41fb8b
--- /dev/null
+++ b/mobile/android/actors/ContentDelegateChild.sys.mjs
@@ -0,0 +1,163 @@
+/* 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/. */
+
+import { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  ManifestObtainer: "resource://gre/modules/ManifestObtainer.sys.mjs",
+});
+
+export class ContentDelegateChild extends GeckoViewActorChild {
+  notifyParentOfViewportFit() {
+    if (this.triggerViewportFitChange) {
+      this.contentWindow.cancelIdleCallback(this.triggerViewportFitChange);
+    }
+    this.triggerViewportFitChange = this.contentWindow.requestIdleCallback(
+      () => {
+        this.triggerViewportFitChange = null;
+        const viewportFit = this.contentWindow.windowUtils.getViewportFitInfo();
+        if (this.lastViewportFit === viewportFit) {
+          return;
+        }
+        this.lastViewportFit = viewportFit;
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:DOMMetaViewportFit",
+          viewportfit: viewportFit,
+        });
+      }
+    );
+  }
+
+  // eslint-disable-next-line complexity
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+
+    switch (aEvent.type) {
+      case "contextmenu": {
+        function nearestParentAttribute(aNode, aAttribute) {
+          while (
+            aNode &&
+            aNode.hasAttribute &&
+            !aNode.hasAttribute(aAttribute)
+          ) {
+            aNode = aNode.parentNode;
+          }
+          return aNode && aNode.getAttribute && aNode.getAttribute(aAttribute);
+        }
+
+        function createAbsoluteUri(aBaseUri, aUri) {
+          if (!aUri || !aBaseUri || !aBaseUri.displaySpec) {
+            return null;
+          }
+          return Services.io.newURI(aUri, null, aBaseUri).displaySpec;
+        }
+
+        const node = aEvent.composedTarget;
+        const baseUri = node.ownerDocument.baseURIObject;
+        const uri = createAbsoluteUri(
+          baseUri,
+          nearestParentAttribute(node, "href")
+        );
+        const title = nearestParentAttribute(node, "title");
+        const alt = nearestParentAttribute(node, "alt");
+        const elementType = ChromeUtils.getClassName(node);
+        const isImage = elementType === "HTMLImageElement";
+        const isMedia =
+          elementType === "HTMLVideoElement" ||
+          elementType === "HTMLAudioElement";
+        let elementSrc = (isImage || isMedia) && (node.currentSrc || node.src);
+        if (elementSrc) {
+          const isBlob = elementSrc.startsWith("blob:");
+          if (isBlob && !URL.isValidObjectURL(elementSrc)) {
+            elementSrc = null;
+          }
+        }
+
+        if (uri || isImage || isMedia) {
+          const msg = {
+            type: "GeckoView:ContextMenu",
+            // We don't have full zoom on Android, so using CSS coordinates
+            // here is fine, since the CSS coordinate spaces match between the
+            // child and parent processes.
+            screenX: aEvent.screenX,
+            screenY: aEvent.screenY,
+            baseUri: (baseUri && baseUri.displaySpec) || null,
+            uri,
+            title,
+            alt,
+            elementType,
+            elementSrc: elementSrc || null,
+            textContent: node.textContent || null,
+          };
+
+          this.eventDispatcher.sendRequest(msg);
+          aEvent.preventDefault();
+        }
+        break;
+      }
+      case "MozDOMFullscreen:Request": {
+        this.sendAsyncMessage("GeckoView:DOMFullscreenRequest", {});
+        break;
+      }
+      case "MozDOMFullscreen:Entered":
+      case "MozDOMFullscreen:Exited":
+        // Content may change fullscreen state by itself, and we should ensure
+        // that the parent always exits fullscreen when content has left
+        // full screen mode.
+        if (this.contentWindow?.document.fullscreenElement) {
+          break;
+        }
+      // fall-through
+      case "MozDOMFullscreen:Exit":
+        this.sendAsyncMessage("GeckoView:DOMFullscreenExit", {});
+        break;
+      case "DOMMetaViewportFitChanged":
+        if (aEvent.originalTarget.ownerGlobal == this.contentWindow) {
+          this.notifyParentOfViewportFit();
+        }
+        break;
+      case "DOMContentLoaded": {
+        if (aEvent.originalTarget.ownerGlobal == this.contentWindow) {
+          // If loaded content doesn't have viewport-fit, parent still
+          // uses old value of previous content.
+          this.notifyParentOfViewportFit();
+        }
+        if (this.contentWindow !== this.contentWindow?.top) {
+          // Only check WebApp manifest on the top level window.
+          return;
+        }
+        this.contentWindow.requestIdleCallback(async () => {
+          const manifest = await lazy.ManifestObtainer.contentObtainManifest(
+            this.contentWindow
+          );
+          if (manifest) {
+            this.eventDispatcher.sendRequest({
+              type: "GeckoView:WebAppManifest",
+              manifest,
+            });
+          }
+        });
+        break;
+      }
+      case "MozFirstContentfulPaint": {
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:FirstContentfulPaint",
+        });
+        break;
+      }
+      case "MozPaintStatusReset": {
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:PaintStatusReset",
+        });
+        break;
+      }
+    }
+  }
+}
+
+const { debug, warn } = ContentDelegateChild.initLogging(
+  "ContentDelegateChild"
+);