chromium/src/third_party/blink/public/mojom/font_access/font_access.mojom

// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module blink.mojom;

import "third_party/blink/public/mojom/permissions/permission_status.mojom";
import "mojo/public/mojom/base/shared_memory.mojom";

enum FontEnumerationStatus {
  kOk,
  // The functionality has not been implemented yet.
  kUnimplemented,
  // The service failed due to an unexpected error.
  kUnexpectedError,
  // Needs user activation to proceed.
  kNeedsUserActivation,
  // Page needs to be visible.
  kNotVisible,
  // The site doesn't have permission for the requested operation.
  kPermissionDenied,
  // The user canceled the operation.
  kCanceled,
};

// Bag of data representing a font, used to pass structured data from
// content to embedder and from browser to renderer.
struct FontMetadata {
  string postscript_name;
  string full_name;
  string family;
};

// Implemented in the browser process to pass font data to windows
// and workers in renderer processes.
// Provides methods related to enumerating locally installed fonts.
interface FontAccessManager {
  // Enumerate locally installed fonts. Results will be gated by a permission
  // check.
  EnumerateLocalFonts() => (FontEnumerationStatus enumeration_status, mojo_base.mojom.ReadOnlySharedMemoryRegion? enumeration_table);
  // Begins a UX that gives affordances for a user to choose fonts to be shared
  // with the page.
  // `selection`, if not empty, will limit the font selection to those matching
  // the supplied list.
  ChooseLocalFonts(array<string> selection) => (FontEnumerationStatus status, array<FontMetadata> chosen_fonts);
};