fix(interaction): honor scroll cancellation and visible bounds

This commit is contained in:
drakezhang
2026-09-10 00:05:48 +08:00
parent 29355e041d
commit 61c97c9cb5
13 changed files with 955 additions and 189 deletions
@@ -602,6 +602,7 @@ describe("ToolDispatcher", () => {
it.each([
"focus",
"blur",
"scroll_to",
] as const)("routes %s with hover cleanup and cooperative cancellation", async (action) => {
const tab = { id: 7, windowId: 4242, active: true };
vi.stubGlobal("chrome", {
@@ -654,7 +655,15 @@ describe("ToolDispatcher", () => {
});
expect(cdp.send).not.toHaveBeenCalledWith(7, "DOM.focus", expect.anything());
expect(cdp.send).not.toHaveBeenCalledWith(7, "Runtime.callFunctionOn", expect.anything());
expect(cdp.send).toHaveBeenCalledWith(7, "Runtime.releaseObject", { objectId: "focus-target" });
if (action === "scroll_to") {
expect(cdp.send).toHaveBeenCalledWith(7, "Runtime.releaseObjectGroup", {
objectGroup: expect.any(String),
});
} else {
expect(cdp.send).toHaveBeenCalledWith(7, "Runtime.releaseObject", {
objectId: "focus-target",
});
}
expect(chrome.tabs.sendMessage).toHaveBeenCalledWith(
7,
expect.objectContaining({ enabled: false }),
@@ -0,0 +1,348 @@
// @vitest-environment node
// Opt in with BSK_SCROLL_CHROME=/path/to/chrome. Uses an isolated browser/profile.
import { describe, expect, it } from "vitest";
import type { CdpFrame, CdpFrameGraph, CdpTarget } from "@/browser-driver/frame-graph";
import { SessionManager } from "@/session-manager/manager";
import type { ViewportRect } from "../geometry";
import { handleScrollTo } from "../scroll";
import type { CdpRunner } from "../shared";
type Send = <T = Record<string, unknown>>(
method: string,
params?: object,
sessionId?: string,
) => Promise<T>;
type Tree = { frame: { id: string; parentId?: string; name?: string }; childFrames?: Tree[] };
async function withBrowser(
run: (h: Awaited<ReturnType<typeof harness>>) => Promise<void>,
zoom = 1,
) {
const { withChrome } = await import(
new URL(
"../../../../../evals/browser/cases/regression/snapshot-coordinates/chrome.mjs",
import.meta.url,
).href
);
await withChrome(
{ executable: process.env.BSK_SCROLL_CHROME, deviceScale: 1, zoom },
async (send: Send) => run(await harness(send)),
);
}
async function harness(send: Send) {
const { targetId } = await send<{ targetId: string }>("Target.createTarget", {
url: "about:blank",
});
const { sessionId: rootSession } = await send<{ sessionId: string }>("Target.attachToTarget", {
targetId,
flatten: true,
});
await send("Page.bringToFront", {}, rootSession);
const manager = new SessionManager({
agentWindow: {
create: async () => 100,
remove: async () => {},
ensureActiveTab: async () => 4,
},
});
const ctx = await manager.start("aa11");
const calls: { method: string; sessionId?: string }[] = [];
const after = { command: (_method: string) => {} };
const sessionFor = (target: CdpTarget) => target.sessionId ?? rootSession;
const forward = async <T>(target: CdpTarget, method: string, params?: object): Promise<T> => {
calls.push({ method, sessionId: target.sessionId });
const result = await send<T>(method, params, sessionFor(target));
after.command(method);
return result;
};
const cdp: CdpRunner = {
send: (_tab, method, params) => forward({ tabId: 4 }, method, params),
sendToTarget: forward,
};
const evaluate = async <T>(expression: string, frame?: CdpFrame): Promise<T> => {
const session = frame ? sessionFor(frame.target) : rootSession;
const world = frame
? await send<{ executionContextId: number }>(
"Page.createIsolatedWorld",
{
frameId: frame.frameId,
worldName: "scroll-oracle",
},
session,
)
: undefined;
const reply = await send<{ result: { value: T }; exceptionDetails?: unknown }>(
"Runtime.evaluate",
{
expression,
contextId: world?.executionContextId,
returnByValue: true,
awaitPromise: true,
},
session,
);
expect(reply.exceptionDetails).toBeUndefined();
return reply.result.value;
};
const rememberRef = (frame: CdpFrame, backendNodeId: number) =>
ctx.refStore.set("e1", backendNodeId, {
tabId: 4,
frameId: frame.frameId,
cdpSessionId: frame.target.sessionId,
});
const ref = async (frame: CdpFrame, selector = "#probe") => {
const { executionContextId } = await send<{ executionContextId: number }>(
"Page.createIsolatedWorld",
{
frameId: frame.frameId,
worldName: "scroll-oracle",
},
sessionFor(frame.target),
);
const { result } = await send<{ result: { objectId: string } }>(
"Runtime.evaluate",
{
expression: `document.querySelector(${JSON.stringify(selector)})`,
contextId: executionContextId,
},
sessionFor(frame.target),
);
const { node } = await send<{ node: { backendNodeId: number } }>(
"DOM.describeNode",
{ objectId: result.objectId },
sessionFor(frame.target),
);
await send("Runtime.releaseObject", { objectId: result.objectId }, sessionFor(frame.target));
rememberRef(frame, node.backendNodeId);
};
const scroll = (target: { selector: string } | { ref: string }, signal?: AbortSignal) =>
handleScrollTo(
manager,
{ session_id: "aa11", ...target },
{
cdp,
signal,
tabsApi: {
get: async (id) => ({ id, windowId: 100, active: true }) as chrome.tabs.Tab,
query: async () => [{ id: 4, windowId: 100, active: true } as chrome.tabs.Tab],
},
},
);
const loadFrames = async () => {
const { targetInfos } = await send<{ targetInfos: { targetId: string; type: string }[] }>(
"Target.getTargets",
);
const sessions = [rootSession];
for (const target of targetInfos.filter((t) => t.type === "iframe")) {
const { sessionId } = await send<{ sessionId: string }>("Target.attachToTarget", {
targetId: target.targetId,
flatten: true,
});
sessions.push(sessionId);
}
const frames: (CdpFrame & { name: string })[] = [];
for (const session of sessions) {
const { frameTree } = await send<{ frameTree: Tree }>("Page.getFrameTree", {}, session);
const target = { tabId: 4, ...(session !== rootSession ? { sessionId: session } : {}) };
const visit = (tree: Tree, parentFrameId = tree.frame.parentId) => {
frames.push({ frameId: tree.frame.id, parentFrameId, target, name: tree.frame.name ?? "" });
for (const child of tree.childFrames ?? []) visit(child, tree.frame.id);
};
visit(frameTree);
}
for (const frame of frames) {
if (!frame.parentFrameId) continue;
const parent = frames.find((f) => f.frameId === frame.parentFrameId)!;
const owner = await send<{ backendNodeId: number }>(
"DOM.getFrameOwner",
{ frameId: frame.frameId },
sessionFor(parent.target),
);
frame.ownerBackendNodeId = owner.backendNodeId;
}
const graph: CdpFrameGraph = { rootFrameId: frames[0].frameId, frames };
cdp.getFrameGraph = async () => graph;
return frames;
};
return { send, rootSession, evaluate, ref, rememberRef, scroll, loadFrames, calls, after };
}
function intersection(a: ViewportRect, b: ViewportRect): ViewportRect | null {
const x = Math.max(a.x, b.x),
y = Math.max(a.y, b.y);
const right = Math.min(a.x + a.width, b.x + b.width),
bottom = Math.min(a.y + a.height, b.y + b.height);
return right > x && bottom > y ? { x, y, width: right - x, height: bottom - y } : null;
}
function expectRect(actual: unknown, expected: ViewportRect) {
expect(actual).not.toHaveProperty("code");
for (const key of ["x", "y", "width", "height"] as const)
expect(Math.abs((actual as ViewportRect)[key] - expected[key]), key).toBeLessThan(2);
}
describe.skipIf(!process.env.BSK_SCROLL_CHROME)("real browser scroll-to", () => {
it("scrolls ordinary elements and reports the clipped portion of nested scrollers", async () => {
await withBrowser(async (h) => {
for (const html of [
'<div style="height:2200px"></div><div id="target" style="width:100px;height:40px"></div>',
'<div style="height:200px"></div><div id="clip" style="height:80px;width:200px;overflow:auto"><div id="target" style="width:100px;height:400px"></div></div>',
'<div style="height:200px"></div><div id="clip" style="height:80px;width:200px;overflow:auto;transform:scale(1.25);transform-origin:0 0"><div id="target" style="width:100px;height:400px"></div></div>',
]) {
await h.evaluate(`document.body.innerHTML = ${JSON.stringify(html)}`);
const result = await h.scroll({ selector: "#target" });
const oracle = await h.evaluate<{ rect: ViewportRect; clip?: ViewportRect }>(`({
rect: document.querySelector('#target').getBoundingClientRect().toJSON(),
clip: document.querySelector('#clip')?.getBoundingClientRect().toJSON()
})`);
expectRect(result, oracle.clip ? intersection(oracle.rect, oracle.clip)! : oracle.rect);
}
});
});
it.each([
"visibility:hidden",
"opacity:0",
"display:none",
"content-visibility:hidden",
])("rejects %s targets", async (style) => {
await withBrowser(async (h) => {
await h.evaluate(
`document.body.innerHTML = '<div style="${style}"><button id="target">Target</button></div>'`,
);
expect(await h.scroll({ selector: "#target" })).toMatchObject({
code: "permission_denied",
data: { reason: "element_not_visible" },
});
});
});
it("rejects targets fully outside an overflow:clip ancestor", async () => {
await withBrowser(async (h) => {
await h.evaluate(
`document.body.innerHTML = '<div style="height:80px;overflow:clip"><div style="height:150px"></div><button id="target">Target</button></div>'`,
);
expect(await h.scroll({ selector: "#target" })).toMatchObject({ code: "permission_denied" });
});
});
it.each(["open", "closed"])("clips %s shadow-root refs", async (mode) => {
await withBrowser(async (h) => {
await h.evaluate(`(() => {
const host = document.createElement('div'); document.body.append(host);
const root = host.attachShadow({mode:'${mode}'});
root.innerHTML = '<div style="height:60px;overflow:auto"><button id="probe" style="height:200px;width:100px">Target</button></div>';
window.probe = root.querySelector('#probe');
})()`);
const frames = await h.loadFrames();
const { result } = await h.send<{ result: { objectId: string } }>(
"Runtime.evaluate",
{ expression: "window.probe" },
h.rootSession,
);
// Build the ref from the actual closed-root node, as an observation does.
const { node } = await h.send<{ node: { backendNodeId: number } }>(
"DOM.describeNode",
{ objectId: result.objectId },
h.rootSession,
);
await h.send("Runtime.releaseObject", { objectId: result.objectId }, h.rootSession);
h.rememberRef(frames[0], node.backendNodeId);
expect(await h.scroll({ ref: "e1" })).toMatchObject({ height: 60 });
});
});
it("cancels after scrolling and releases the measurement object without follow-up reads", async () => {
await withBrowser(async (h) => {
await h.evaluate("document.body.innerHTML = '<button id=target>Target</button>'");
const abort = new AbortController();
h.after.command = (method) => {
if (method === "DOM.resolveNode") abort.abort();
};
expect(await h.scroll({ selector: "#target" }, abort.signal)).toMatchObject({
code: "cancelled",
});
expect(h.calls.at(-1)!.method).toBe("Runtime.releaseObjectGroup");
expect(h.calls.some((call) => call.method === "Runtime.callFunctionOn")).toBe(false);
});
});
it.each([
{ fixture: "snapshot-coordinates", zoom: 1 },
{ fixture: "snapshot-coordinates", zoom: 1.25 },
{ fixture: "oopif-scrollbars", zoom: 1 },
{ fixture: "oopif-scrollbars", zoom: 0.8 },
])("scrolls nested frames: $fixture at zoom $zoom", async ({ fixture, zoom }) => {
const { createEvalServer } = await import(
new URL("../../../../../evals/browser/lib/server.mjs", import.meta.url).href
);
const server = createEvalServer();
const { baseUrl } = await server.start();
try {
await withBrowser(async (h) => {
await h.send("Page.navigate", { url: `${baseUrl}/${fixture}?run=scroll` }, h.rootSession);
await expect
.poll(
() =>
server
.snapshot("scroll")
.events.some(
(e: { type: string; data: { root?: boolean } }) =>
e.type === "geometry.ready" && e.data.root,
),
{ timeout: 10_000 },
)
.toBe(true);
const frames = await h.loadFrames();
expect(frames.length).toBe(fixture === "snapshot-coordinates" ? 5 : 3);
for (const frame of frames) {
await h.ref(frame);
const result = await h.scroll({ ref: "e1" });
// Independent DOM oracle: CSS border boxes plus this fixture's known
// axis-aligned iframe scales. Re-read after each scroll changes layout.
let rect = await h.evaluate<ViewportRect>(
"document.querySelector('#probe').getBoundingClientRect().toJSON()",
frame,
);
let current = frame;
while (true) {
const viewport = await h.evaluate<ViewportRect>(
"({ x:0, y:0, width:document.documentElement.clientWidth, height:document.documentElement.clientHeight })",
current,
);
rect = intersection(rect, viewport)!;
if (!current.parentFrameId) break;
const parent = frames.find((f) => f.frameId === current.parentFrameId)!;
const owner = await h.evaluate<{ x: number; y: number; scale: number }>(
`(() => {
const iframe = document.querySelector('iframe[name="${current.name}"]');
const r = iframe.getBoundingClientRect(); const s = getComputedStyle(iframe);
const scale = r.width / iframe.offsetWidth;
return { x:r.x + (iframe.clientLeft + parseFloat(s.paddingLeft))*scale,
y:r.y + (iframe.clientTop + parseFloat(s.paddingTop))*scale, scale };
})()`,
parent,
);
rect = {
x: owner.x + rect.x * owner.scale,
y: owner.y + rect.y * owner.scale,
width: rect.width * owner.scale,
height: rect.height * owner.scale,
};
current = parent;
}
expectRect(result, rect);
}
const child = frames.find((frame) => frame.parentFrameId === frames[0].frameId)!;
await h.ref(child);
await h.evaluate(
`document.querySelector('iframe[name="${child.name}"]').style.opacity = '0'`,
);
expect(await h.scroll({ ref: "e1" })).toMatchObject({ code: "permission_denied" });
}, zoom);
} finally {
await server.stop();
}
}, 30_000);
});
+278 -117
View File
@@ -1,63 +1,121 @@
import { describe, expect, it, vi } from "vitest";
import { afterEach, describe, expect, it, vi } from "vitest";
import type { CdpFrameGraph, CdpTarget } from "@/browser-driver/frame-graph";
import { SessionManager } from "@/session-manager/manager";
import type { CdpRunner } from "@/tools/shared";
import type { JavaScriptDialogInfo, ScrollToParams } from "@/transport/types";
import type { ViewportRect } from "../geometry";
import { handleScrollTo } from "../scroll";
import type { CdpRunner } from "../shared";
function fakeAgentWindow(ids: number[]) {
let i = 0;
return {
create: vi.fn(async () => {
const id = ids[i++];
if (id === undefined) throw new Error("ran out of fake ids");
return id;
}),
remove: vi.fn(async () => {}),
ensureActiveTab: vi.fn(async () => {}),
};
interface Call {
target: CdpTarget;
method: string;
params?: Record<string, unknown>;
aborted: boolean;
}
function makeFakeCdp(handlers: Record<string, (params: unknown) => unknown>) {
const sent: Array<{ tabId: number; method: string; params?: object }> = [];
const sendImpl = async (tabId: number, method: string, params?: object) => {
sent.push({ tabId, method, params });
const handler = handlers[method];
if (!handler && method === "Page.getLayoutMetrics") {
return { cssLayoutViewport: { clientWidth: 1280, clientHeight: 720 } };
}
if (!handler) throw new Error(`unexpected CDP call ${method}`);
return handler(params);
async function fixture(frame: "top" | "same-target" | "oopif" = "top") {
const manager = new SessionManager({
agentWindow: {
create: async () => 100,
remove: async () => {},
ensureActiveTab: async () => 4,
},
});
const ctx = await manager.start("aa11");
ctx.refStore.set("e3", 1234, {
tabId: 4,
...(frame !== "top" ? { frameId: "child" } : {}),
...(frame === "oopif" ? { cdpSessionId: "child-session" } : {}),
});
const abort = new AbortController();
const graph: CdpFrameGraph = {
rootFrameId: "main",
frames: [
{ frameId: "main", target: { tabId: 4 } },
{
frameId: "child",
parentFrameId: "main",
ownerBackendNodeId: 99,
target: { tabId: 4, ...(frame === "oopif" ? { sessionId: "child-session" } : {}) },
},
],
};
const rectangles = new Map<number, ViewportRect | null>([
[1234, { x: 10, y: 20, width: 100, height: 40 }],
[99, { x: 204, y: 306, width: 400, height: 200 }],
]);
const calls: Call[] = [];
const hooks = {
after: (_call: Call) => {},
reply: (_call: Call): object | undefined => undefined,
};
const send = async <T>(target: CdpTarget, method: string, params?: object): Promise<T> => {
const call = {
target,
method,
params: params as Call["params"],
aborted: abort.signal.aborted,
};
calls.push(call);
const override = hooks.reply(call);
hooks.after(call);
if (override) return override as T;
const args = call.params ?? {};
const replies: Record<string, unknown> = {
"DOM.getDocument": { root: { nodeId: 1 } },
"DOM.querySelector": { nodeId: 2 },
"DOM.describeNode": { node: { backendNodeId: 1234 } },
"DOM.scrollIntoViewIfNeeded": {},
"DOM.resolveNode": { object: { objectId: String(args.backendNodeId) } },
"Runtime.callFunctionOn": {
result: {
value: String(args.functionDeclaration).includes("IntersectionObserver")
? rectangles.get(Number(args.objectId))
: { width: 200, height: 100 },
},
},
"Runtime.releaseObject": {},
"Runtime.releaseObjectGroup": {},
"Runtime.evaluate": { result: { value: { width: 200, height: 100 } } },
"Page.getLayoutMetrics": {
cssLayoutViewport: {
clientWidth: target.sessionId ? 185 : 1280,
clientHeight: target.sessionId ? 89 : 720,
},
},
"DOM.getBoxModel": { model: { content: [204, 306, 604, 306, 604, 506, 204, 506] } },
};
if (!(method in replies)) throw new Error(`unexpected CDP call ${method}`);
return replies[method] as T;
};
const cdp: CdpRunner = {
send: vi.fn(sendImpl) as unknown as CdpRunner["send"],
send: (tabId, method, params) => send({ tabId }, method, params),
sendToTarget: send,
getFrameGraph: vi.fn(async () => {
hooks.after({ target: { tabId: 4 }, method: "getFrameGraph", aborted: abort.signal.aborted });
return graph;
}),
trackSessionTab: vi.fn(),
};
const tabsApi = {
get: vi.fn(
async (tabId: number) => ({ id: tabId, windowId: 100, active: true }) as chrome.tabs.Tab,
),
get: vi.fn(async (id: number) => ({ id, windowId: 100, active: true }) as chrome.tabs.Tab),
query: vi.fn(async () => [{ id: 4, windowId: 100, active: true } as chrome.tabs.Tab]),
};
return { cdp, tabsApi, sent };
const run = (params: Partial<ScrollToParams> = {}) =>
handleScrollTo(
manager,
{ session_id: "aa11", ref: "@e3", ...params },
{ cdp, tabsApi, signal: abort.signal },
);
return { ctx, cdp, graph, rectangles, calls, hooks, abort, tabsApi, run };
}
afterEach(() => vi.restoreAllMocks());
describe("handleScrollTo", () => {
it("scrolls a ref into view and returns its visible top-viewport bounds", async () => {
const manager = new SessionManager({ agentWindow: fakeAgentWindow([100]) });
const ctx = await manager.start("aa11");
ctx.refStore.set("e3", 1234, { tabId: 4 });
const fake = makeFakeCdp({
"DOM.scrollIntoViewIfNeeded": () => ({}),
"DOM.getContentQuads": () => ({ quads: [[10, 20, 110, 20, 110, 60, 10, 60]] }),
});
const result = await handleScrollTo(
manager,
{ session_id: "aa11", ref: "@e3" },
{ cdp: fake.cdp, tabsApi: fake.tabsApi },
);
if ("code" in result) throw new Error(`unexpected error: ${JSON.stringify(result)}`);
expect(result).toMatchObject({
it("scrolls a ref and returns renderer-clipped bounds", async () => {
const f = await fixture();
expect(await f.run()).toMatchObject({
tab_id: 4,
used_ref: "e3",
x: 10,
@@ -65,85 +123,188 @@ describe("handleScrollTo", () => {
width: 100,
height: 40,
});
expect(fake.sent.map((call) => call.method)).toEqual([
"DOM.scrollIntoViewIfNeeded",
"DOM.getContentQuads",
"Page.getLayoutMetrics",
]);
expect(f.calls[0]).toMatchObject({
method: "DOM.scrollIntoViewIfNeeded",
params: { backendNodeId: 1234 },
});
const group = f.calls.find((call) => call.method === "DOM.resolveNode")!.params!.objectGroup;
expect(f.calls.at(-1)).toMatchObject({
method: "Runtime.releaseObjectGroup",
params: { objectGroup: group },
});
});
it("scrolls OOPIF refs through their parent frame and CDP session", async () => {
const manager = new SessionManager({ agentWindow: fakeAgentWindow([100]) });
const ctx = await manager.start("aa11");
ctx.refStore.set("e3", 1234, {
tabId: 4,
frameId: "child-frame",
cdpSessionId: "child-session",
it("resolves a selector and tracks the attached tab even when it is missing", async () => {
const f = await fixture();
expect(await f.run({ ref: undefined, selector: "#target" })).toMatchObject({
used_selector: "#target",
});
const fake = makeFakeCdp({
"DOM.scrollIntoViewIfNeeded": () => ({}),
"DOM.getBoxModel": () => ({
model: { content: [204, 306, 604, 306, 604, 506, 204, 506] },
}),
f.hooks.reply = ({ method }) => (method === "DOM.querySelector" ? { nodeId: 0 } : undefined);
expect(await f.run({ ref: undefined, selector: "#missing" })).toMatchObject({
code: "not_found",
data: { reason: "selector_not_found" },
});
fake.cdp.getFrameGraph = vi.fn(async () => ({
rootFrameId: "main",
frames: [
{ frameId: "main", target: { tabId: 4 } },
{
frameId: "child-frame",
parentFrameId: "main",
ownerBackendNodeId: 99,
target: { tabId: 4, sessionId: "child-session" },
},
],
}));
const targetCalls: Array<{ sessionId?: string; method: string }> = [];
fake.cdp.sendToTarget = vi.fn(async (target, method) => {
targetCalls.push({ sessionId: target.sessionId, method });
if (method === "DOM.scrollIntoViewIfNeeded") return {};
if (method === "DOM.getContentQuads") {
return { quads: [[10, 20, 110, 20, 110, 60, 10, 60]] };
}
if (method === "Runtime.evaluate") {
return { result: { value: { width: 200, height: 100 } } };
}
if (method === "Page.getLayoutMetrics") {
return { cssLayoutViewport: { clientWidth: 200, clientHeight: 100 } };
}
throw new Error(`unexpected child CDP call ${method}`);
}) as CdpRunner["sendToTarget"];
const result = await handleScrollTo(
manager,
{ session_id: "aa11", ref: "@e3" },
{ cdp: fake.cdp, tabsApi: fake.tabsApi },
);
if ("code" in result) throw new Error(`unexpected error: ${JSON.stringify(result)}`);
expect(result).toMatchObject({ x: 224, y: 346, width: 200, height: 80 });
expect(targetCalls).toEqual([
{ sessionId: "child-session", method: "DOM.scrollIntoViewIfNeeded" },
{ sessionId: "child-session", method: "DOM.getContentQuads" },
{ sessionId: "child-session", method: "Page.getLayoutMetrics" },
{ sessionId: "child-session", method: "Runtime.evaluate" },
]);
expect(f.cdp.trackSessionTab).toHaveBeenCalledWith("aa11", 4);
});
it("does not issue CDP calls after an early cancellation", async () => {
const manager = new SessionManager({ agentWindow: fakeAgentWindow([100]) });
await manager.start("aa11");
const abort = new AbortController();
abort.abort();
const fake = makeFakeCdp({});
it.each([
"same-target",
"oopif",
] as const)("projects %s refs and scrolls their owners", async (frame) => {
const f = await fixture(frame);
expect(await f.run()).toMatchObject({ x: 224, y: 346, width: 200, height: 80 });
expect(
f.calls
.filter((call) => call.method === "DOM.scrollIntoViewIfNeeded")
.map((call) => call.params!.backendNodeId),
).toEqual([99, 1234]);
expect(f.cdp.getFrameGraph).toHaveBeenCalledTimes(1);
if (frame === "oopif")
expect(f.calls.find((call) => call.params?.backendNodeId === 1234)!.target.sessionId).toBe(
"child-session",
);
});
const result = await handleScrollTo(
manager,
{ session_id: "aa11", selector: "#target" },
{ cdp: fake.cdp, tabsApi: fake.tabsApi, signal: abort.signal },
);
it("clips OOPIF bounds to occupied scrollbars without changing the frame scale", async () => {
const f = await fixture("oopif");
f.rectangles.set(1234, { x: 180, y: 80, width: 5, height: 9 });
expect(await f.run()).toMatchObject({ x: 564, y: 466, width: 10, height: 18 });
});
expect(result).toMatchObject({ code: "cancelled" });
expect(fake.cdp.send).not.toHaveBeenCalled();
it("clips against the iframe owner's ordinary DOM ancestors", async () => {
const f = await fixture("oopif");
f.rectangles.set(99, { x: 204, y: 306, width: 400, height: 80 });
expect(await f.run()).toMatchObject({ x: 224, y: 346, width: 200, height: 40 });
});
it.each([1234, 99])("rejects a hidden or fully clipped node %i", async (node) => {
const f = await fixture("oopif");
f.rectangles.set(node, null);
expect(await f.run()).toMatchObject({
code: "permission_denied",
data: { reason: "element_not_visible" },
});
expect(f.calls.at(-1)!.method).toBe("Runtime.releaseObjectGroup");
});
it.each([
{ ref: undefined },
{ selector: "#target" },
{ timeout_ms: 0 },
])("rejects invalid params %j", async (params) => {
const f = await fixture();
expect(await f.run(params)).toMatchObject({ code: "invalid_params" });
expect(f.calls).toEqual([]);
});
it.each(["stale", "other-tab"])("rejects %s refs before scrolling", async (mode) => {
const f = await fixture();
if (mode === "stale") f.ctx.refStore.clear();
else f.ctx.refStore.set("e3", 1234, { tabId: 8 });
expect(await f.run()).toMatchObject({ code: "not_found", data: { reason: "ref_not_found" } });
expect(f.calls).toEqual([]);
});
it("enforces the Agent Window boundary", async () => {
const f = await fixture();
f.tabsApi.query.mockResolvedValue([{ id: 4, windowId: 200, active: true } as chrome.tabs.Tab]);
f.tabsApi.get.mockResolvedValue({ id: 4, windowId: 200, active: true } as chrome.tabs.Tab);
expect(await f.run({ tab_id: 4 })).toMatchObject({ code: "permission_denied" });
expect(f.calls).toEqual([]);
});
it.each([
"getFrameGraph",
"DOM.scrollIntoViewIfNeeded",
"DOM.resolveNode",
"Runtime.callFunctionOn",
"Page.getLayoutMetrics",
"Runtime.evaluate",
"DOM.getBoxModel",
])("honors cancellation during %s and only cleans up afterwards", async (method) => {
const f = await fixture("oopif");
f.hooks.after = (call) => {
if (call.method === method) f.abort.abort();
};
expect(await f.run()).toMatchObject({ code: "cancelled" });
expect(
f.calls.filter((call) => call.aborted && call.method !== "Runtime.releaseObjectGroup"),
).toEqual([]);
});
it.each([
"DOM.getDocument",
"DOM.querySelector",
"DOM.describeNode",
])("cancels selector resolution during %s", async (method) => {
const f = await fixture();
f.hooks.after = (call) => {
if (call.method === method) f.abort.abort();
};
expect(await f.run({ ref: undefined, selector: "#target" })).toMatchObject({
code: "cancelled",
});
expect(f.calls.filter((call) => call.aborted)).toEqual([]);
});
it("does not start after early cancellation", async () => {
const f = await fixture();
f.abort.abort();
expect(await f.run()).toMatchObject({ code: "cancelled" });
expect(f.calls).toEqual([]);
expect(f.tabsApi.query).not.toHaveBeenCalled();
});
it("does not issue fallback scrolling after cancellation", async () => {
const f = await fixture();
f.hooks.reply = ({ method }) => {
if (method === "DOM.scrollIntoViewIfNeeded") {
f.abort.abort();
throw new Error("scroll failed");
}
return undefined;
};
expect(await f.run()).toMatchObject({ code: "cancelled" });
expect(f.calls.map((call) => call.method)).toEqual(["DOM.scrollIntoViewIfNeeded"]);
});
it("stops target scrolling after a deadline expires while scrolling its owner", async () => {
const f = await fixture("oopif");
const now = vi.spyOn(Date, "now").mockReturnValue(100);
f.hooks.after = ({ method }) => {
if (method === "DOM.scrollIntoViewIfNeeded") now.mockReturnValue(201);
};
expect(await f.run({ timeout_ms: 100 })).toMatchObject({ code: "timeout" });
expect(f.calls.filter((call) => call.method === "DOM.scrollIntoViewIfNeeded")).toHaveLength(1);
});
it("reports measurement exceptions and releases objects even if cleanup fails", async () => {
const f = await fixture();
f.hooks.reply = ({ method }) => {
if (method === "Runtime.callFunctionOn")
return { exceptionDetails: { text: "measurement failed" } };
if (method === "Runtime.releaseObjectGroup") throw new Error("target closed");
return undefined;
};
expect(await f.run()).toMatchObject({ code: "cdp_failed", message: "measurement failed" });
expect(f.calls.at(-1)!.method).toBe("Runtime.releaseObjectGroup");
});
it("attaches dialogs observed during scrolling", async () => {
const f = await fixture();
f.cdp.dialogCursor = () => 5;
const dialogs: JavaScriptDialogInfo[] = [
{
sequence: 6,
tab_id: 4,
type: "alert",
message: "scrolled",
handled: "accepted",
url: "https://example.test",
},
];
f.cdp.dialogsSince = vi.fn(() => dialogs);
expect(await f.run()).toHaveProperty("dialogs", dialogs);
expect(f.cdp.dialogsSince).toHaveBeenCalledWith(4, 5);
});
});
@@ -0,0 +1,142 @@
import { cdpTargetKey } from "@/browser-driver/frame-graph";
import type { NodeAddress } from "./frame-geometry";
import {
clipPolygon,
projectRegionToViewport,
type Region,
rectPolygon,
regionBounds,
type ViewportRect,
} from "./geometry";
import { GeometryContext } from "./geometry/frame-context";
import { type CdpRunner, sendToCdpTarget } from "./shared";
// Ask the renderer to apply containing-block clips (including shadow DOM),
// instead of treating layout quads as visible pixels. Each document is measured
// locally; the existing frame projections supply the top-viewport coordinates.
// IntersectionObserver reports a bounding rectangle, not an occlusion/hit test.
const VISIBLE_RECT = `function(timeoutMs) {
const element = this;
const visible = () => element.isConnected && element.checkVisibility({
checkOpacity: true, checkVisibilityCSS: true, contentVisibilityAuto: true
});
if (typeof element.checkVisibility !== 'function' || !visible()) return null;
return new Promise((resolve, reject) => {
const observer = new IntersectionObserver(([entry]) => {
clearTimeout(timer);
observer.disconnect();
const rect = entry.intersectionRect;
resolve(visible() && entry.isIntersecting && rect.width > 0 && rect.height > 0
? { x: rect.x, y: rect.y, width: rect.width, height: rect.height }
: null);
}, { root: element.ownerDocument });
const timer = setTimeout(() => {
observer.disconnect();
reject(new Error('scroll-to visibility measurement timed out'));
}, timeoutMs);
observer.observe(element);
});
}`;
async function visibleRect(
cdp: CdpRunner,
address: NodeAddress,
deadline: number,
): Promise<ViewportRect | null> {
const resolved = await sendToCdpTarget<{ object?: { objectId?: string } }>(
cdp,
address.target,
"DOM.resolveNode",
{ backendNodeId: address.backendNodeId },
);
if (!resolved.object?.objectId) throw new Error("scroll-to could not resolve the target element");
const reply = await sendToCdpTarget<{
result?: { value?: ViewportRect | null };
exceptionDetails?: { text?: string; exception?: { description?: string } };
}>(cdp, address.target, "Runtime.callFunctionOn", {
objectId: resolved.object.objectId,
functionDeclaration: VISIBLE_RECT,
// Bound this read even if a background document stops rendering. Its
// observer always disconnects; cancellation cannot leave a live observer.
arguments: [{ value: Math.max(1, Math.min(1_000, deadline - Date.now())) }],
awaitPromise: true,
returnByValue: true,
});
if (reply.exceptionDetails) {
const details = reply.exceptionDetails;
throw new Error(details.exception?.description ?? details.text ?? "visibility script failed");
}
const rect = reply.result?.value;
if (rect === null) return null;
if (
!rect ||
![rect.x, rect.y, rect.width, rect.height].every(Number.isFinite) ||
rect.width <= 0 ||
rect.height <= 0
) {
throw new Error("scroll-to visibility measurement returned invalid bounds");
}
return rect;
}
async function projectRect(
context: GeometryContext,
address: NodeAddress,
rect: ViewportRect,
): Promise<Region> {
let region: Region = [rectPolygon({ x: rect.x, y: rect.y, w: rect.width, h: rect.height })];
if (!address.frameId) return region;
const frame = await context.frame(address.frameId);
if (!frame || cdpTargetKey(frame.target) !== cdpTargetKey(address.target)) {
throw new Error("scroll-to frame no longer belongs to its target");
}
const parent = frame.parentFrameId ? await context.frame(frame.parentFrameId) : undefined;
if (parent && cdpTargetKey(parent.target) === cdpTargetKey(frame.target)) {
// DOM rectangles are document-local. Same-target iframe quads are already
// target-local, so cross this one boundary before the target projection.
const viewport = await context.viewport(frame.target);
if (frame.ownerBackendNodeId === undefined || !viewport) {
throw new Error("scroll-to could not resolve the frame viewport");
}
const local = await context.snapshotProjection(address, frame.ownerBackendNodeId, [], viewport);
if (local.status !== "available") throw new Error("scroll-to could not project the frame");
region = projectRegionToViewport(region, local.projection.geometry);
}
const projection = await context.targetProjection(frame.frameId);
if (!projection) throw new Error("scroll-to could not project the target viewport");
return projectRegionToViewport(region, projection);
}
/** Only scroll-to needs renderer-clipped bounds; other interaction geometry is unchanged. */
export async function scrollVisibleBounds(
cdp: CdpRunner,
tabId: number,
address: NodeAddress,
deadline: number,
): Promise<ViewportRect | null> {
const context = new GeometryContext(cdp, tabId);
const rect = await visibleRect(cdp, address, deadline);
if (!rect) return null;
let region = await projectRect(context, address, rect);
if (address.frameId) {
const ancestry = await context.ancestry(address.frameId);
if (!ancestry) throw new Error("scroll-to could not resolve the frame ancestry");
for (const child of ancestry) {
const parent = child.parentFrameId ? await context.frame(child.parentFrameId) : undefined;
if (!parent || child.ownerBackendNodeId === undefined) {
throw new Error("scroll-to could not resolve the frame owner");
}
const owner = {
target: parent.target,
frameId: parent.frameId,
backendNodeId: child.ownerBackendNodeId,
};
// A visible child document can still have a hidden or clipped iframe.
const ownerRect = await visibleRect(cdp, owner, deadline);
if (!ownerRect) return null;
const clips = await projectRect(context, owner, ownerRect);
region = region.flatMap((polygon) => clips.map((clip) => clipPolygon(polygon, clip)));
}
}
return regionBounds(region);
}
+101 -33
View File
@@ -1,9 +1,12 @@
import { ChromiumCdp } from "@/browser-driver/chromium-cdp";
import { type CdpTarget, cdpTargetKey } from "@/browser-driver/frame-graph";
import type { SessionManager } from "@/session-manager/manager";
import type { RpcError, ScrollToParams, ScrollToResult } from "@/transport/types";
import { attachDialogs, markDialogCursor } from "./dialogs";
import { resolveNodeGeometry } from "./frame-geometry";
import { cdpError, rpcError } from "./errors";
import { scrollElementAndFramesIntoView } from "./frame-geometry";
import { resolveBackendNode } from "./interaction";
import { scrollVisibleBounds } from "./scroll-visibility";
import {
type CdpRunner,
type ChromeTabsApi,
@@ -12,6 +15,7 @@ import {
isRpcError,
lookupSession,
resolveTargetTab,
sendToCdpTarget,
} from "./shared";
export interface ScrollToDeps {
@@ -34,36 +38,100 @@ export async function handleScrollTo(
const ctxOrErr = lookupSession(manager, params, "scroll-to");
if (isRpcError(ctxOrErr)) return ctxOrErr;
const ctx = ctxOrErr;
if (deps.signal?.aborted) return { code: "cancelled", message: "scroll-to aborted" };
const target = await resolveTargetTab(manager, ctx, params.tab_id, deps.tabsApi);
if (isRpcError(target)) return target;
const denied = enforceAgentWindow(ctx, target, "scroll-to");
if (denied) return denied;
const dialogCursor = markDialogCursor(deps.cdp, target.tabId);
const node = await resolveBackendNode(deps.cdp, ctx, target, params, "scroll-to");
if (isRpcError(node)) return node;
if (deps.signal?.aborted) return { code: "cancelled", message: "scroll-to aborted" };
deps.cdp.trackSessionTab?.(ctx.sessionId, target.tabId);
const geometry = await resolveNodeGeometry(
deps.cdp,
target.tabId,
{
target: node.cdpTarget,
backendNodeId: node.backendNodeId,
...(node.frameId ? { frameId: node.frameId } : {}),
},
{ scrollIntoView: true },
);
if (isRpcError(geometry)) return geometry;
return attachDialogs(deps.cdp, target.tabId, dialogCursor, {
tab_id: target.tabId,
used_ref: node.usedRef,
used_selector: node.usedSelector,
x: geometry.topBounds.x,
y: geometry.topBounds.y,
width: geometry.topBounds.width,
height: geometry.topBounds.height,
});
const timeout = params.timeout_ms ?? 30_000;
if (!Number.isInteger(timeout) || timeout <= 0) {
return { code: "invalid_params", message: "timeout_ms must be a positive integer" };
}
const deadline = Date.now() + timeout;
const checkActive = () => {
if (deps.signal?.aborted) throw new DOMException("scroll-to aborted", "AbortError");
if (Date.now() >= deadline) throw new DOMException("scroll-to timed out", "TimeoutError");
};
const objectGroup = `bsk-scroll-${crypto.randomUUID()}`;
const objectTargets = new Map<string, CdpTarget>();
const send = async <T>(target: CdpTarget, method: string, args?: object): Promise<T> => {
checkActive();
// Also own objects allocated by the shared scroll fallback. Record the
// target before awaiting so cancellation cannot skip their cleanup.
if (method === "DOM.resolveNode") objectTargets.set(cdpTargetKey(target), target);
const result = await sendToCdpTarget<T>(
deps.cdp,
target,
method,
method === "DOM.resolveNode" ? { ...args, objectGroup } : args,
);
checkActive();
return result;
};
let graph: ReturnType<NonNullable<CdpRunner["getFrameGraph"]>> | undefined;
const cdp: CdpRunner = {
send: (tabId, method, args) => send({ tabId }, method, args),
sendToTarget: send,
trackSessionTab: deps.cdp.trackSessionTab?.bind(deps.cdp),
getFrameGraph: deps.cdp.getFrameGraph
? async (tabId) => {
checkActive();
graph ??= deps.cdp.getFrameGraph!(tabId);
const result = await graph;
checkActive();
return result;
}
: undefined,
};
try {
checkActive();
const target = await resolveTargetTab(manager, ctx, params.tab_id, deps.tabsApi);
checkActive();
if (isRpcError(target)) return target;
const denied = enforceAgentWindow(ctx, target, "scroll-to");
if (denied) return denied;
const dialogCursor = markDialogCursor(deps.cdp, target.tabId);
const node = await resolveBackendNode(cdp, ctx, target, params, "scroll-to");
checkActive();
if (isRpcError(node)) return node;
deps.cdp.trackSessionTab?.(ctx.sessionId, target.tabId);
const scrollError = await scrollElementAndFramesIntoView(
cdp,
target.tabId,
node.cdpTarget,
node.backendNodeId,
node.frameId,
);
checkActive();
if (scrollError) return scrollError;
const bounds = await scrollVisibleBounds(
cdp,
target.tabId,
{
target: node.cdpTarget,
backendNodeId: node.backendNodeId,
frameId: node.frameId,
},
deadline,
);
checkActive();
if (!bounds)
return rpcError(
"permission_denied",
"element_not_visible",
"scroll-to target has no visible area",
);
return attachDialogs(deps.cdp, target.tabId, dialogCursor, {
tab_id: target.tabId,
used_ref: node.usedRef,
used_selector: node.usedSelector,
...bounds,
});
} catch (error) {
if (deps.signal?.aborted) return { code: "cancelled", message: "scroll-to aborted" };
if (Date.now() >= deadline) return { code: "timeout", message: "scroll-to timed out" };
return cdpError(error);
} finally {
// Cleanup bypasses the cancellation guard and cannot replace the result.
for (const target of objectTargets.values()) {
await sendToCdpTarget(deps.cdp, target, "Runtime.releaseObjectGroup", { objectGroup }).catch(
() => {},
);
}
}
}