mirror of
https://github.com/Tencent/BrowserSkill.git
synced 2026-09-10 13:01:23 +08:00
feat(vom): vom base algorithm and infrastructure
This commit is contained in:
Ljy-0827
@@ -0,0 +1,630 @@
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import { describe, expect, it, vi } from "vitest";
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import { OVERLAY_HOST_MARKER_ATTR, OVERLAY_HOST_NAME } from "../../../lib/overlay-bridge";
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import { captureViewModel, collectOverlayExcludedBackendIds } from "../capture";
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// Minimal but format-accurate captureSnapshot reply: a body with one
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// fixed full-screen overlay div carrying a password input.
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function fakeSnapshotReply() {
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// strings table
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const S = [
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"html",
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"body",
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"div",
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"input",
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"position",
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"fixed",
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"static",
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"pointer-events",
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"auto",
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"type",
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"password",
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];
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const i = (s: string) => S.indexOf(s);
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return {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1, 2],
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nodeType: [1, 1, 1, 1],
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nodeName: [i("html"), i("body"), i("div"), i("input")],
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backendNodeId: [10, 11, 12, 13],
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attributes: [[], [], [], [i("type"), i("password")]],
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},
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layout: {
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nodeIndex: [1, 2, 3],
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// styles columns follow requested computedStyles order: [position, pointer-events]
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styles: [
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[i("static"), i("auto")],
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[i("fixed"), i("auto")],
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[i("static"), i("auto")],
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],
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bounds: [
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[0, 0, 1000, 4000],
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[0, 0, 1000, 800],
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[400, 300, 200, 40],
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],
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paintOrders: [0, 50, 51],
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},
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},
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],
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};
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}
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function makeCdp(snapshot: unknown) {
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return {
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send: vi.fn(async (_tab: number, method: string) => {
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if (method === "DOMSnapshot.enable") return {};
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if (method === "DOMSnapshot.captureSnapshot") return snapshot;
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if (method === "Page.getLayoutMetrics") {
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return { cssLayoutViewport: { clientWidth: 1000, clientHeight: 800, pageX: 0, pageY: 0 } };
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}
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throw new Error(`unexpected ${method}`);
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}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
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};
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}
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describe("captureViewModel", () => {
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it("parses nodes, attrs, rects, paint order and styles", async () => {
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const { nodes, viewport, iframeNodes } = await captureViewModel(
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makeCdp(fakeSnapshotReply()),
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4,
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);
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expect(iframeNodes.size).toBe(0);
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expect(viewport).toEqual({ width: 1000, height: 800 });
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const div = nodes.find((n) => n.backendNodeId === 12);
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expect(div).toMatchObject({ tag: "div", position: "fixed", parentBackendNodeId: 11 });
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expect(div?.rect).toEqual({ x: 0, y: 0, w: 1000, h: 800 });
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expect(div?.paintOrder).toBe(50);
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const input = nodes.find((n) => n.backendNodeId === 13);
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expect(input?.attrs).toEqual({ type: "password" });
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});
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it("excludes the agent's own overlay shadow host and its inlined shadow subtree", async () => {
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// DOMSnapshot inlines an open shadow root's content as descendants of the
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// host. The agent's WXT overlay host carries a fixed full-viewport
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// click-blocker + the "中断" button. Capturing it makes the snapshot detect
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// the agent's own mask as a blocking layer and occlude the real page, so the
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// whole subtree must be dropped.
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const S = [
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"html",
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"body",
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"div",
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OVERLAY_HOST_NAME,
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"button",
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OVERLAY_HOST_MARKER_ATTR,
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"position",
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"fixed",
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"static",
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"pointer-events",
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"auto",
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"cursor",
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"pointer",
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];
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const i = (s: string) => S.indexOf(s);
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const snapshot = {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1, 0, 3, 4],
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nodeName: [i("html"), i("body"), i("div"), i(OVERLAY_HOST_NAME), i("div"), i("button")],
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backendNodeId: [10, 11, 12, 13, 14, 15],
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attributes: [[], [], [], [i(OVERLAY_HOST_MARKER_ATTR), -1], [], []],
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},
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layout: {
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nodeIndex: [0, 1, 2, 3, 4, 5],
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styles: [
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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[i("fixed"), i("auto"), i("auto")],
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[i("fixed"), i("auto"), i("pointer")],
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],
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bounds: [
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[0, 0, 1000, 4000],
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[0, 0, 1000, 800],
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[10, 10, 200, 40],
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[0, 0, 0, 0],
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[0, 0, 1000, 800],
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[400, 750, 80, 40],
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],
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paintOrders: [0, 1, 2, 3, 9, 10],
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},
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},
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],
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};
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const { nodes } = await captureViewModel(makeCdp(snapshot), 4);
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const ids = nodes.map((n) => n.backendNodeId);
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// Real page nodes survive.
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expect(ids).toContain(12);
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// Overlay host + its inlined shadow subtree are gone.
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expect(ids).not.toContain(13);
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expect(ids).not.toContain(14);
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expect(ids).not.toContain(15);
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});
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it("returns excludedBackendNodeIds for the overlay host subtree", async () => {
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const S = [
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"html",
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"body",
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"div",
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OVERLAY_HOST_NAME,
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"button",
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OVERLAY_HOST_MARKER_ATTR,
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"position",
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"fixed",
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"static",
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"pointer-events",
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"auto",
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"cursor",
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"pointer",
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];
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const i = (s: string) => S.indexOf(s);
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const snapshot = {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1, 0, 3, 4],
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nodeName: [i("html"), i("body"), i("div"), i(OVERLAY_HOST_NAME), i("div"), i("button")],
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backendNodeId: [10, 11, 12, 13, 14, 15],
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attributes: [[], [], [], [i(OVERLAY_HOST_MARKER_ATTR), -1], [], []],
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},
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layout: {
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nodeIndex: [0, 1, 2, 3, 4, 5],
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styles: [
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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[i("fixed"), i("auto"), i("auto")],
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[i("fixed"), i("auto"), i("pointer")],
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],
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bounds: [
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[0, 0, 1000, 4000],
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[0, 0, 1000, 800],
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[10, 10, 200, 40],
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[0, 0, 0, 0],
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[0, 0, 1000, 800],
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[400, 750, 80, 40],
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],
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paintOrders: [0, 1, 2, 3, 9, 10],
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},
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},
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],
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};
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const { excludedBackendNodeIds } = await captureViewModel(makeCdp(snapshot), 4);
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expect(excludedBackendNodeIds).toEqual(new Set([13, 14, 15]));
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});
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it("excludes overlay host matched by tag name only", async () => {
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const S = [
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"html",
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"body",
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OVERLAY_HOST_NAME,
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"position",
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"static",
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"pointer-events",
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"auto",
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"cursor",
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"auto",
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];
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const i = (s: string) => S.indexOf(s);
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const snapshot = {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1],
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nodeName: [i("html"), i("body"), i(OVERLAY_HOST_NAME)],
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backendNodeId: [10, 11, 13],
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attributes: [[], [], []],
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},
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layout: {
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nodeIndex: [1, 2],
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styles: [
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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],
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bounds: [
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[0, 0, 1000, 800],
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[0, 0, 100, 40],
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],
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paintOrders: [0, 1],
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},
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},
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],
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};
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const { nodes, excludedBackendNodeIds } = await captureViewModel(makeCdp(snapshot), 4);
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expect(nodes.map((n) => n.backendNodeId)).not.toContain(13);
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expect(excludedBackendNodeIds).toEqual(new Set([13]));
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});
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it("excludes overlay host matched by marker attribute only", async () => {
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const S = [
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"html",
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"body",
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"div",
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OVERLAY_HOST_MARKER_ATTR,
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"position",
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"static",
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"pointer-events",
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"auto",
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"cursor",
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"auto",
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];
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const i = (s: string) => S.indexOf(s);
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const snapshot = {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1],
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nodeName: [i("html"), i("body"), i("div")],
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backendNodeId: [10, 11, 13],
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attributes: [[], [], [i(OVERLAY_HOST_MARKER_ATTR), -1]],
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},
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layout: {
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nodeIndex: [1, 2],
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styles: [
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[i("static"), i("auto"), i("auto")],
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[i("static"), i("auto"), i("auto")],
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],
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bounds: [
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[0, 0, 1000, 800],
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[0, 0, 100, 40],
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],
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paintOrders: [0, 1],
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},
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},
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],
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};
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const { nodes, excludedBackendNodeIds } = await captureViewModel(makeCdp(snapshot), 4);
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expect(nodes.map((n) => n.backendNodeId)).not.toContain(13);
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expect(excludedBackendNodeIds).toEqual(new Set([13]));
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});
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it("parses the computed cursor from the third style column", async () => {
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const S = [
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"html",
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"body",
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"div",
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"position",
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"static",
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"fixed",
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"pointer-events",
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"auto",
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"cursor",
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"pointer",
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];
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const i = (s: string) => S.indexOf(s);
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const snapshot = {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1],
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nodeName: [i("html"), i("body"), i("div")],
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backendNodeId: [10, 11, 12],
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attributes: [[], [], []],
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},
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layout: {
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nodeIndex: [1, 2],
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// styles columns: [position, pointer-events, cursor]
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styles: [
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[i("static"), i("auto"), i("auto")],
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[i("fixed"), i("auto"), i("pointer")],
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],
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bounds: [
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[0, 0, 1000, 800],
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[10, 10, 40, 40],
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],
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paintOrders: [0, 1],
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},
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},
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],
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};
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const { nodes } = await captureViewModel(makeCdp(snapshot), 4);
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expect(nodes.find((n) => n.backendNodeId === 12)?.cursor).toBe("pointer");
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expect(nodes.find((n) => n.backendNodeId === 11)?.cursor).toBe("auto");
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});
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it("subtracts scroll offset to make rects viewport-relative", async () => {
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const cdp = {
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send: vi.fn(async (_t: number, method: string) => {
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if (method === "DOMSnapshot.enable") return {};
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if (method === "DOMSnapshot.captureSnapshot") return fakeSnapshotReply();
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if (method === "Page.getLayoutMetrics") {
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return {
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cssLayoutViewport: { clientWidth: 1000, clientHeight: 800, pageX: 0, pageY: 200 },
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};
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}
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throw new Error(method);
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}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
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};
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const { nodes } = await captureViewModel(cdp, 4);
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// overlay div bounds y=0 minus scroll pageY=200 → y=-200
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expect(nodes.find((n) => n.backendNodeId === 12)?.rect?.y).toBe(-200);
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});
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it("normalizes device-pixel bounds by devicePixelRatio", async () => {
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const S = ["html", "body", "div", "position", "fixed", "static", "pointer-events", "auto"];
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const i = (s: string) => S.indexOf(s);
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const snapshot = {
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strings: S,
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documents: [
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{
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nodes: {
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parentIndex: [-1, 0, 1],
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nodeName: [i("html"), i("body"), i("div")],
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||||
backendNodeId: [10, 11, 12],
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attributes: [[], [], []],
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},
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||||
layout: {
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||||
nodeIndex: [1, 2],
|
||||
styles: [
|
||||
[i("static"), i("auto")],
|
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[i("fixed"), i("auto")],
|
||||
],
|
||||
bounds: [
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||||
[0, 0, 2000, 3200],
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||||
[0, 0, 2000, 1600],
|
||||
],
|
||||
paintOrders: [0, 50],
|
||||
},
|
||||
},
|
||||
],
|
||||
};
|
||||
const cdp = {
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||||
send: vi.fn(async (_t: number, method: string) => {
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||||
if (method === "DOMSnapshot.enable") return {};
|
||||
if (method === "DOMSnapshot.captureSnapshot") return snapshot;
|
||||
if (method === "Page.getLayoutMetrics") {
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||||
return {
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cssLayoutViewport: { clientWidth: 1000, clientHeight: 800, pageX: 0, pageY: 0 },
|
||||
layoutViewport: { clientWidth: 2000, clientHeight: 1600 },
|
||||
};
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||||
}
|
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throw new Error(method);
|
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}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
|
||||
};
|
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const { nodes } = await captureViewModel(cdp, 4);
|
||||
expect(nodes.find((n) => n.backendNodeId === 12)?.rect).toEqual({
|
||||
x: 0,
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||||
y: 0,
|
||||
w: 1000,
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||||
h: 800,
|
||||
});
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||||
});
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||||
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it("extracts textContent from #text child nodes via nodeValue", async () => {
|
||||
// Simulates a button with text "登录" and an <a> with text "忘记密码".
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||||
// nodeValue is a parallel array: element nodes = -1, text nodes = string index.
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||||
const S = [
|
||||
"html",
|
||||
"body",
|
||||
"button",
|
||||
"a",
|
||||
"position",
|
||||
"fixed",
|
||||
"static",
|
||||
"pointer-events",
|
||||
"auto",
|
||||
"登录",
|
||||
"忘记密码",
|
||||
];
|
||||
const i = (s: string) => S.indexOf(s);
|
||||
const snapshot = {
|
||||
strings: S,
|
||||
documents: [
|
||||
{
|
||||
scrollOffsetX: 0,
|
||||
scrollOffsetY: 0,
|
||||
nodes: {
|
||||
parentIndex: [-1, 0, 1, 2, 1, 4],
|
||||
nodeName: [i("html"), i("body"), i("button"), i("#text"), i("a"), i("#text")],
|
||||
backendNodeId: [10, 11, 12, 13, 14, 15],
|
||||
attributes: [[], [], [], [], [], []],
|
||||
nodeValue: [-1, -1, -1, i("登录"), -1, i("忘记密码")],
|
||||
},
|
||||
layout: {
|
||||
nodeIndex: [1, 2, 4],
|
||||
styles: [
|
||||
[i("static"), i("auto")],
|
||||
[i("static"), i("auto")],
|
||||
[i("static"), i("auto")],
|
||||
],
|
||||
bounds: [
|
||||
[0, 0, 1000, 800],
|
||||
[100, 300, 200, 60],
|
||||
[100, 380, 120, 36],
|
||||
],
|
||||
paintOrders: [0, 10, 11],
|
||||
},
|
||||
},
|
||||
],
|
||||
};
|
||||
const cdp = {
|
||||
send: vi.fn(async (_t: number, method: string) => {
|
||||
if (method === "DOMSnapshot.enable") return {};
|
||||
if (method === "DOMSnapshot.captureSnapshot") return snapshot;
|
||||
if (method === "Page.getLayoutMetrics") {
|
||||
return {
|
||||
cssLayoutViewport: { clientWidth: 1000, clientHeight: 800, pageX: 0, pageY: 0 },
|
||||
};
|
||||
}
|
||||
throw new Error(method);
|
||||
}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
|
||||
};
|
||||
const { nodes } = await captureViewModel(cdp, 4);
|
||||
const btn = nodes.find((n) => n.backendNodeId === 12);
|
||||
expect(btn?.textContent).toBe("登录");
|
||||
const link = nodes.find((n) => n.backendNodeId === 14);
|
||||
expect(link?.textContent).toBe("忘记密码");
|
||||
// Nodes without text children should have no textContent
|
||||
const body = nodes.find((n) => n.backendNodeId === 11);
|
||||
expect(body?.textContent).toBeUndefined();
|
||||
});
|
||||
|
||||
it("parses iframe sub-documents and returns iframeNodes keyed by iframe backendNodeId", async () => {
|
||||
const S = [
|
||||
"html",
|
||||
"body",
|
||||
"div",
|
||||
"iframe",
|
||||
"input",
|
||||
"position",
|
||||
"fixed",
|
||||
"static",
|
||||
"pointer-events",
|
||||
"auto",
|
||||
"type",
|
||||
"text",
|
||||
"src",
|
||||
"https://passport.jd.com/login",
|
||||
];
|
||||
const i = (s: string) => S.indexOf(s);
|
||||
const snapshot = {
|
||||
strings: S,
|
||||
documents: [
|
||||
{
|
||||
scrollOffsetX: 0,
|
||||
scrollOffsetY: 0,
|
||||
nodes: {
|
||||
parentIndex: [-1, 0, 1, 2],
|
||||
nodeName: [i("html"), i("body"), i("div"), i("iframe")],
|
||||
backendNodeId: [10, 11, 12, 13],
|
||||
attributes: [[], [], [], [i("src"), i("https://passport.jd.com/login")]],
|
||||
// Sparse: node at array-index 3 (the iframe, backendNodeId=13) → documents[1]
|
||||
contentDocumentIndex: { index: [3], value: [1] },
|
||||
},
|
||||
layout: {
|
||||
nodeIndex: [1, 2, 3],
|
||||
styles: [
|
||||
[i("static"), i("auto")],
|
||||
[i("fixed"), i("auto")],
|
||||
[i("static"), i("auto")],
|
||||
],
|
||||
bounds: [
|
||||
[0, 0, 1000, 4000],
|
||||
[0, 0, 1000, 800],
|
||||
[100, 300, 800, 400],
|
||||
],
|
||||
paintOrders: [0, 50, 51],
|
||||
},
|
||||
},
|
||||
// documents[1]: the iframe's sub-document with a login input
|
||||
{
|
||||
scrollOffsetX: 0,
|
||||
scrollOffsetY: 0,
|
||||
nodes: {
|
||||
parentIndex: [-1, 0],
|
||||
nodeName: [i("body"), i("input")],
|
||||
backendNodeId: [100, 101],
|
||||
attributes: [[], [i("type"), i("text")]],
|
||||
},
|
||||
layout: {
|
||||
nodeIndex: [1],
|
||||
styles: [[i("static"), i("auto")]],
|
||||
bounds: [[0, 0, 200, 40]],
|
||||
paintOrders: [0],
|
||||
},
|
||||
},
|
||||
],
|
||||
};
|
||||
const cdp = {
|
||||
send: vi.fn(async (_t: number, method: string) => {
|
||||
if (method === "DOMSnapshot.enable") return {};
|
||||
if (method === "DOMSnapshot.captureSnapshot") return snapshot;
|
||||
if (method === "Page.getLayoutMetrics") {
|
||||
return {
|
||||
cssLayoutViewport: { clientWidth: 1000, clientHeight: 800, pageX: 0, pageY: 0 },
|
||||
};
|
||||
}
|
||||
throw new Error(method);
|
||||
}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
|
||||
};
|
||||
const { nodes, iframeNodes } = await captureViewModel(cdp, 4);
|
||||
// Main frame has 4 nodes; iframe is included
|
||||
expect(nodes.find((n) => n.backendNodeId === 13)?.tag).toBe("iframe");
|
||||
// iframeNodes keyed by the <iframe> element's backendNodeId=13
|
||||
expect(iframeNodes.size).toBe(1);
|
||||
expect(iframeNodes.has(13)).toBe(true);
|
||||
const subNodes = iframeNodes.get(13)!;
|
||||
expect(subNodes.find((n) => n.backendNodeId === 101)?.tag).toBe("input");
|
||||
expect(subNodes.find((n) => n.backendNodeId === 101)?.attrs.type).toBe("text");
|
||||
});
|
||||
|
||||
it("normalizes bounds then subtracts CSS scroll at dpr>1", async () => {
|
||||
const S = ["html", "body", "div", "position", "fixed", "static", "pointer-events", "auto"];
|
||||
const i = (s: string) => S.indexOf(s);
|
||||
const snapshot = {
|
||||
strings: S,
|
||||
documents: [
|
||||
{
|
||||
nodes: {
|
||||
parentIndex: [-1, 0, 1],
|
||||
nodeName: [i("html"), i("body"), i("div")],
|
||||
backendNodeId: [10, 11, 12],
|
||||
attributes: [[], [], []],
|
||||
},
|
||||
layout: {
|
||||
nodeIndex: [1, 2],
|
||||
styles: [
|
||||
[i("static"), i("auto")],
|
||||
[i("fixed"), i("auto")],
|
||||
],
|
||||
bounds: [
|
||||
[0, 0, 2000, 3200],
|
||||
[0, 400, 2000, 1600],
|
||||
],
|
||||
paintOrders: [0, 50],
|
||||
},
|
||||
},
|
||||
],
|
||||
};
|
||||
const cdp = {
|
||||
send: vi.fn(async (_t: number, method: string) => {
|
||||
if (method === "DOMSnapshot.enable") return {};
|
||||
if (method === "DOMSnapshot.captureSnapshot") return snapshot;
|
||||
if (method === "Page.getLayoutMetrics") {
|
||||
return {
|
||||
cssLayoutViewport: { clientWidth: 1000, clientHeight: 800, pageX: 0, pageY: 100 },
|
||||
layoutViewport: { clientWidth: 2000, clientHeight: 1600 },
|
||||
};
|
||||
}
|
||||
throw new Error(method);
|
||||
}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
|
||||
};
|
||||
const { nodes } = await captureViewModel(cdp, 4);
|
||||
expect(nodes.find((n) => n.backendNodeId === 12)?.rect?.y).toBe(400 / 2 - 100);
|
||||
});
|
||||
|
||||
it("collectOverlayExcludedBackendIds walks the pierced overlay host subtree", async () => {
|
||||
const cdp = {
|
||||
send: vi.fn(async (_t: number, method: string) => {
|
||||
if (method === "DOM.getDocument") return { root: { nodeId: 1 } };
|
||||
if (method === "DOM.querySelector") return { nodeId: 99 };
|
||||
if (method === "DOM.describeNode") {
|
||||
return {
|
||||
node: {
|
||||
backendNodeId: 200,
|
||||
shadowRoots: [
|
||||
{ backendNodeId: 201, children: [{ backendNodeId: 202, children: [] }] },
|
||||
],
|
||||
},
|
||||
};
|
||||
}
|
||||
throw new Error(method);
|
||||
}) as unknown as <T>(tabId: number, method: string, params?: object) => Promise<T>,
|
||||
};
|
||||
const excluded = await collectOverlayExcludedBackendIds(cdp, 4);
|
||||
expect(excluded).toEqual(new Set([200, 201, 202]));
|
||||
});
|
||||
});
|
||||
Reference in New Issue
Block a user