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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/passage_embeddings/embedder_tab_observer.h"
#include <numeric>
#include <string>
#include <vector>
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/timer/elapsed_timer.h"
#include "chrome/browser/history_embeddings/history_embeddings_utils.h"
#include "chrome/browser/passage_embeddings/chrome_passage_embeddings_service_controller.h"
#include "chrome/browser/passage_embeddings/passage_embedder_model_observer_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/resource_coordinator/tab_load_tracker.h"
#include "components/passage_embeddings/passage_embedder_model_observer.h"
#include "components/passage_embeddings/passage_embeddings_features.h"
#include "components/passage_embeddings/passage_embeddings_types.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/weak_document_ptr.h"
#include "content/public/browser/web_contents.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "services/service_manager/public/cpp/interface_provider.h"
#include "url/gurl.h"
namespace passage_embeddings {
namespace {
blink::mojom::InnerTextParamsPtr MakeInnerTextParams() {
auto params = blink::mojom::InnerTextParams::New();
params->max_words_per_aggregate_passage = kMaxWordsPerAggregatePassage.Get();
params->max_passages = kMaxPassagesPerPage.Get();
params->min_words_per_passage = kMinWordsPerPassage.Get();
return params;
}
void OnGotEmbeddings(base::ElapsedTimer embeddings_computation_timer,
std::vector<std::string> passages,
std::vector<Embedding> embeddings,
Embedder::TaskId task_id,
ComputeEmbeddingsStatus status) {
if (status != ComputeEmbeddingsStatus::kSuccess) {
return;
}
VLOG(3) << "Embeddings computed in "
<< embeddings_computation_timer.Elapsed();
}
} // namespace
EmbedderTabObserver::EmbedderTabObserver(content::WebContents* web_contents)
: content::WebContentsObserver(web_contents) {}
EmbedderTabObserver::~EmbedderTabObserver() = default;
void EmbedderTabObserver::DidFinishLoad(
content::RenderFrameHost* render_frame_host,
const GURL& validated_url) {
if (!PassageEmbedderModelObserverFactory::GetForProfile(GetProfile()) ||
history_embeddings::IsHistoryEmbeddingsEnabledForProfile(GetProfile())) {
return;
}
if (!render_frame_host->IsInPrimaryMainFrame()) {
return;
}
// Invalidate existing weak pointers to cancel any outstanding delayed tasks.
weak_ptr_factory_.InvalidateWeakPtrs();
ScheduleExtraction(render_frame_host->GetWeakDocumentPtr());
}
bool EmbedderTabObserver::ScheduleExtraction(
content::WeakDocumentPtr weak_render_frame_host) {
if (!weak_render_frame_host.AsRenderFrameHostIfValid()) {
VLOG(3) << "Extraction cancelled; no RenderFrameHost at scheduling";
return false;
}
base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&EmbedderTabObserver::MaybeExtractPassages,
weak_ptr_factory_.GetWeakPtr(), weak_render_frame_host),
kPassageExtractionDelay.Get());
return true;
}
void EmbedderTabObserver::MaybeExtractPassages(
content::WeakDocumentPtr weak_render_frame_host) {
// Do not wait for all tabs when using performance scenario.
// SchedulingEmbedder will use performance scenario which takes loading states
// into account. By not enforcing this custom non-contention logic, the
// performance scenario load state handling can be tuned and the feature
// behavior will follow.
if (resource_coordinator::TabLoadTracker::Get()->GetLoadingTabCount() > 0 &&
!kUsePerformanceScenario.Get()) {
VLOG(3) << "Extraction to be rescheduled; tabs still loading";
ScheduleExtraction(weak_render_frame_host);
return;
}
ExtractPassages(weak_render_frame_host);
}
void EmbedderTabObserver::ExtractPassages(
content::WeakDocumentPtr weak_render_frame_host) {
content::RenderFrameHost* render_frame_host =
weak_render_frame_host.AsRenderFrameHostIfValid();
if (!render_frame_host || !render_frame_host->IsRenderFrameLive()) {
VLOG(3) << "Extraction cancelled; no RenderFrameHost at extraction";
return;
}
base::ElapsedTimer passage_extraction_timer;
mojo::Remote<blink::mojom::InnerTextAgent> agent;
render_frame_host->GetRemoteInterfaces()->GetInterface(
agent.BindNewPipeAndPassReceiver());
auto* agent_ptr = agent.get();
agent_ptr->GetInnerText(
MakeInnerTextParams(),
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
base::BindOnce(&EmbedderTabObserver::OnGotPassages,
weak_ptr_factory_.GetWeakPtr(), std::move(agent),
std::move(passage_extraction_timer)),
nullptr));
}
void EmbedderTabObserver::OnGotPassages(
mojo::Remote<blink::mojom::InnerTextAgent> remote,
base::ElapsedTimer passage_extraction_timer,
blink::mojom::InnerTextFramePtr mojo_frame) {
if (!mojo_frame) {
return;
}
std::vector<std::string> passages;
for (const auto& segment : mojo_frame->segments) {
if (segment->is_text()) {
passages.emplace_back(segment->get_text());
}
}
const size_t total_text_size =
std::accumulate(passages.cbegin(), passages.cend(), 0u,
[](size_t acc, const std::string& passage) {
return acc + passage.size();
});
VLOG(3) << passages.size() << " passages extracted in "
<< passage_extraction_timer.Elapsed() << " with a total text size of "
<< total_text_size;
base::ElapsedTimer embeddings_computation_timer;
ChromePassageEmbeddingsServiceController::Get()
->GetEmbedder()
->ComputePassagesEmbeddings(
PassagePriority::kPassive, std::move(passages),
base::BindOnce(&OnGotEmbeddings,
std::move(embeddings_computation_timer)));
}
Profile* EmbedderTabObserver::GetProfile() {
CHECK(web_contents());
return Profile::FromBrowserContext(web_contents()->GetBrowserContext());
}
} // namespace passage_embeddings
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