1 files changed, 246 insertions, 0 deletions
diff --git a/remote/cdp/domains/content/DOM.sys.mjs b/remote/cdp/domains/content/DOM.sys.mjs
new file mode 100644
index 0000000000..8f920756e6
--- /dev/null
+++ b/remote/cdp/domains/content/DOM.sys.mjs
@@ -0,0 +1,246 @@
+/* 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 { ContentProcessDomain } from "chrome://remote/content/cdp/domains/ContentProcessDomain.sys.mjs";
+
+export class DOM extends ContentProcessDomain {
+  constructor(session) {
+    super(session);
+    this.enabled = false;
+  }
+
+  destructor() {
+    this.disable();
+  }
+
+  // commands
+
+  async enable() {
+    if (!this.enabled) {
+      this.enabled = true;
+    }
+  }
+
+  /**
+   * Describes node given its id.
+   *
+   * Does not require domain to be enabled. Does not start tracking any objects.
+   *
+   * @param {Object} options
+   * @param {number=} options.backendNodeId [not supported]
+   *     Identifier of the backend node.
+   * @param {number=} options.depth [not supported]
+   *     The maximum depth at which children should be retrieved, defaults to 1.
+   *     Use -1 for the entire subtree or provide an integer larger than 0.
+   * @param {number=} options.nodeId [not supported]
+   *     Identifier of the node.
+   * @param {string} options.objectId
+   *     JavaScript object id of the node wrapper.
+   * @param {boolean=} options.pierce [not supported]
+   *     Whether or not iframes and shadow roots should be traversed
+   *     when returning the subtree, defaults to false.
+   *
+   * @return {DOM.Node}
+   *     Node description.
+   */
+  describeNode(options = {}) {
+    const { objectId } = options;
+
+    // Until nodeId/backendNodeId is supported force usage of the objectId
+    if (!["string"].includes(typeof objectId)) {
+      throw new TypeError("objectId: string value expected");
+    }
+
+    const Runtime = this.session.domains.get("Runtime");
+    const debuggerObj = Runtime._getRemoteObject(objectId);
+    if (!debuggerObj) {
+      throw new Error("Could not find object with given id");
+    }
+
+    if (typeof debuggerObj.nodeId == "undefined") {
+      throw new Error("Object id doesn't reference a Node");
+    }
+
+    const unsafeObj = debuggerObj.unsafeDereference();
+
+    const attributes = [];
+    if (unsafeObj.attributes) {
+      // Flatten the list of attributes for name and value
+      for (const attribute of unsafeObj.attributes) {
+        attributes.push(attribute.name, attribute.value);
+      }
+    }
+
+    let context = this.docShell.browsingContext;
+    if (HTMLIFrameElement.isInstance(unsafeObj)) {
+      context = unsafeObj.contentWindow.docShell.browsingContext;
+    }
+
+    const node = {
+      nodeId: debuggerObj.nodeId,
+      backendNodeId: debuggerObj.nodeId,
+      nodeType: unsafeObj.nodeType,
+      nodeName: unsafeObj.nodeName,
+      localName: unsafeObj.localName,
+      nodeValue: unsafeObj.nodeValue ? unsafeObj.nodeValue.toString() : "",
+      childNodeCount: unsafeObj.childElementCount,
+      attributes: attributes.length ? attributes : undefined,
+      frameId: context.id.toString(),
+    };
+
+    return { node };
+  }
+
+  disable() {
+    if (this.enabled) {
+      this.enabled = false;
+    }
+  }
+
+  getContentQuads(options = {}) {
+    const { objectId } = options;
+    const Runtime = this.session.domains.get("Runtime");
+    const debuggerObj = Runtime._getRemoteObject(objectId);
+    if (!debuggerObj) {
+      throw new Error(`Cannot find object with id: ${objectId}`);
+    }
+    const unsafeObject = debuggerObj.unsafeDereference();
+    if (!unsafeObject.getBoxQuads) {
+      throw new Error("RemoteObject is not a node");
+    }
+    let quads = unsafeObject.getBoxQuads({ relativeTo: this.content.document });
+    quads = quads.map(quad => {
+      return [
+        quad.p1.x,
+        quad.p1.y,
+        quad.p2.x,
+        quad.p2.y,
+        quad.p3.x,
+        quad.p3.y,
+        quad.p4.x,
+        quad.p4.y,
+      ].map(Math.round);
+    });
+    return { quads };
+  }
+
+  getBoxModel(options = {}) {
+    const { objectId } = options;
+    const Runtime = this.session.domains.get("Runtime");
+    const debuggerObj = Runtime._getRemoteObject(objectId);
+    if (!debuggerObj) {
+      throw new Error(`Cannot find object with id: ${objectId}`);
+    }
+    const unsafeObject = debuggerObj.unsafeDereference();
+    const bounding = unsafeObject.getBoundingClientRect();
+    const model = {
+      width: Math.round(bounding.width),
+      height: Math.round(bounding.height),
+    };
+    for (const box of ["content", "padding", "border", "margin"]) {
+      const quads = unsafeObject.getBoxQuads({
+        box,
+        relativeTo: this.content.document,
+      });
+
+      // getBoxQuads may return more than one element. In this case we have to compute the bounding box
+      // of all these boxes.
+      let bounding = {
+        p1: { x: Infinity, y: Infinity },
+        p2: { x: -Infinity, y: Infinity },
+        p3: { x: -Infinity, y: -Infinity },
+        p4: { x: Infinity, y: -Infinity },
+      };
+      quads.forEach(quad => {
+        bounding = {
+          p1: {
+            x: Math.min(bounding.p1.x, quad.p1.x),
+            y: Math.min(bounding.p1.y, quad.p1.y),
+          },
+          p2: {
+            x: Math.max(bounding.p2.x, quad.p2.x),
+            y: Math.min(bounding.p2.y, quad.p2.y),
+          },
+          p3: {
+            x: Math.max(bounding.p3.x, quad.p3.x),
+            y: Math.max(bounding.p3.y, quad.p3.y),
+          },
+          p4: {
+            x: Math.min(bounding.p4.x, quad.p4.x),
+            y: Math.max(bounding.p4.y, quad.p4.y),
+          },
+        };
+      });
+
+      model[box] = [
+        bounding.p1.x,
+        bounding.p1.y,
+        bounding.p2.x,
+        bounding.p2.y,
+        bounding.p3.x,
+        bounding.p3.y,
+        bounding.p4.x,
+        bounding.p4.y,
+      ].map(Math.round);
+    }
+    return {
+      model,
+    };
+  }
+
+  /**
+   * Resolves the JavaScript node object for a given NodeId or BackendNodeId.
+   *
+   * @param {Object} options
+   * @param {number} options.backendNodeId [required for now]
+   *     Backend identifier of the node to resolve.
+   * @param {number=} options.executionContextId
+   *     Execution context in which to resolve the node.
+   * @param {number=} options.nodeId [not supported]
+   *     Id of the node to resolve.
+   * @param {string=} options.objectGroup [not supported]
+   *     Symbolic group name that can be used to release multiple objects.
+   *
+   * @return {Runtime.RemoteObject}
+   *     JavaScript object wrapper for given node.
+   */
+  resolveNode(options = {}) {
+    const { backendNodeId, executionContextId } = options;
+
+    // Until nodeId is supported force usage of the backendNodeId
+    // Bug 1625417 - CDP expects the id as number
+    if (!["string"].includes(typeof backendNodeId)) {
+      throw new TypeError("backendNodeId: string value expected");
+    }
+    if (!["undefined", "number"].includes(typeof executionContextId)) {
+      throw new TypeError("executionContextId: integer value expected");
+    }
+
+    const Runtime = this.session.domains.get("Runtime");
+
+    // Retrieve the node to resolve, and its context
+    const debuggerObj = Runtime._getRemoteObjectByNodeId(backendNodeId);
+
+    if (!debuggerObj) {
+      throw new Error(`No node with given id found`);
+    }
+
+    // If execution context isn't specified use the default one for the node
+    let context;
+    if (typeof executionContextId != "undefined") {
+      context = Runtime.contexts.get(executionContextId);
+      if (!context) {
+        throw new Error(`Node with given id does not belong to the document`);
+      }
+    } else {
+      context = Runtime._getDefaultContextForWindow();
+    }
+
+    Runtime._setRemoteObject(debuggerObj, context);
+
+    return {
+      object: Runtime._serializeRemoteObject(debuggerObj, context.id),
+    };
+  }
+}