pdf_ocr_helper.h | Explore in Territory

// 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.

#ifndef COMPONENTS_PDF_RENDERER_PDF_OCR_HELPER_H_
#define COMPONENTS_PDF_RENDERER_PDF_OCR_HELPER_H_

#include <vector>

#include "base/containers/queue.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "content/public/renderer/render_frame_observer.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "pdf/accessibility_structs.h"
#include "services/screen_ai/public/mojom/screen_ai_service.mojom.h"
#include "ui/accessibility/ax_node_id_forward.h"
#include "ui/accessibility/ax_tree_update.h"

namespace chrome_pdf {
class PdfAccessibilityImageFetcher;
}  // namespace chrome_pdf

namespace content {
class RenderFrame;
}  // namespace content

namespace pdf {

// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
// LINT.IfChange(PdfOcrRequestStatus)
enum class PdfOcrRequestStatus { … };
// LINT.ThenChange(/tools/metrics/histograms/metadata/accessibility/enums.xml:PdfOcrRequestStatus)

// Used for storing OCR requests either before performing an OCR job, or after
// the results have been received. This is for scheduling the work in another
// task in batches in order to unblock the user from reading a partially
// OCRed PDF, and in order to avoid sending all the images to the OCR Helper
// at once, in case the PDF is closed halfway through the OCR process.
struct PdfOcrRequest { … };

// Manages the connection to the OCR Service via Mojo, and ensures that
// requests are sent in order and that responses are batched.
class PdfOcrHelper : public content::RenderFrameObserver { … };

}  // namespace pdf

#endif  // COMPONENTS_PDF_RENDERER_PDF_OCR_HELPER_H_
chromium/components/pdf/renderer/pdf_ocr_helper.h
