chromeos/crosapi/mojom/local_printer.mojom

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module crosapi.mojom;

import "mojo/public/mojom/base/time.mojom";
import "printing/backend/mojom/print_backend.mojom";
import "printing/mojom/print.mojom";
import "ui/gfx/geometry/mojom/geometry.mojom";
import "url/mojom/url.mojom";

// This structure holds basic information about a printer.
// It corresponds to the LocalDestinationInfo object in
// chrome/browser/resources/print_preview/data/local_parsers.js.
[Stable]
struct LocalDestinationInfo {
  // Printer id.
  string id@0;
  // Printer display name.
  string name@1;
  // Printer description.
  string description@2;
  // Whether or not the printer is configured through a policy.
  // Corresponds to the cupsEnterprisePrinter field of the js
  // LocalDestinationInfo object.
  bool configured_via_policy@3;
  // The GURL class cannot be used as it does not support the ipp/ipps scheme.
  [MinVersion=3] string? uri@4;
};

// A container for the results of a printer status query. A printer status
// query can return multiple errors so PrinterStatus contains multiple
// StatusReasons. This struct corresponds to the PrinterStatus object in
// chrome/browser/resources/print_preview/data/printer_status_cros.js.
[Stable]
struct PrinterStatus {
  // Printer id.
  string printer_id@0;
  // Timestamp is set when the Status object is created.
  mojo_base.mojom.Time timestamp@1;
  // Status reasons lists warnings and errors encountered by the
  // printer such as low on ink or out of paper.
  array<StatusReason> status_reasons@2;
};

// StatusReason is a combination of a reason, which describes the state of a
// printer, and a severity, which is the level of seriousness of that state.
// The Reason and Severity enum types are also used by the CupsPrinterStatus
// object in chromeos/printing/cups_printer_status.h.
[Stable]
struct StatusReason {
  // Reason describes the state of the printer.
  // It is used by the CupsPrinterStatus class
  // (chromeos/printing/cups_printer_status.h).
  Reason reason@0;
  // Severity is the level of seriousness of a printer state.
  // It is also used by the CupsPrinterStatus class.
  Severity severity@1;
  // See chrome/browser/chromeos/printing/cups_printer_status_creator.cc
  // for information about the mapping (many to one) of
  // printing::PrinterStatus::PrinterReason::Reason (UMA histogram) values
  // which correspond to IPP printer-state-reasons (rfc2911#section-4.4.12)
  // to the Reason enum below. kNoError is a reserved value that is unused
  // by the PrinterStatus object.
  [Stable, Extensible]
  enum Reason {
    [Default] kUnknownReason,
    kDeviceError,
    kDoorOpen,
    kLowOnInk,
    kLowOnPaper,
    kNoError, // reserved
    kOutOfInk,
    kOutOfPaper,
    kOutputAreaAlmostFull,
    kOutputFull,
    kPaperJam,
    kPaused,
    kPrinterQueueFull,
    kPrinterUnreachable,
    kStopped,
    kTrayMissing,
  };
  [Stable, Extensible]
  enum Severity {
    [Default] kUnknownSeverity,
    kReport,
    kWarning,
    kError,
  };
};

// This structure is a subset of the PrintJobInfo message in
// chrome/browser/chromeos/printing/history/print_job_info.proto.
[Stable]
struct PrintJob {
  // Printer id.
  string device_name@0;
  // The title of the document which was printed.
  string title@1;
  // Print job ID (used to check job status in CUPS).
  uint32 job_id@2;
  // The number of pages in the document.
  uint32 page_count@3;
  // Source showing which component initiated the print job.
  Source source@4;
  // ID of source. Should be empty if source is PRINT_PREVIEW or ARC.
  string source_id@5;
  // Converted to a print_job_info.proto ColorMode enum via
  // printing::IsColorModelSelected().
  printing.mojom.ColorModel color_mode@6;
  // The requested duplex mode.
  DuplexMode duplex_mode@7;
  // Size in microns of the media used for printing.
  gfx.mojom.Size media_size@8;
  // Vendor-provided ID, e.g. "iso_a3_297x420mm" or "na_index-3x5_3x5in".
  // Possible values are values of "media" IPP attribute and can be found on
  // https://www.iana.org/assignments/ipp-registrations/ipp-registrations.xhtml.
  string media_vendor_id@9;
  // The requested number of copies.
  uint32 copies@10;
  // A subset of DuplexMode in printing/mojom/print.mojom.
  // kUnknownDuplexMode has been removed to match the proto version
  // in chrome/browser/chromeos/printing/history/print_job_info.proto.
  [Stable, Extensible]
  enum DuplexMode {
    [Default] kSimplex,
    kLongEdge,
    kShortEdge,
  };
  // Used in chrome/browser/printing/print_job.h.
  // TODO(b/184986771): Rename to kUnknown, kPrintPreview, etc.
  [Stable, Extensible]
  enum Source {
    [Default] UNKNOWN = -1,
    PRINT_PREVIEW,
    ARC,
    EXTENSION,
    PRINT_PREVIEW_INCOGNITO,
  };
};

// This structure corresponds to the chromeos::PrintServersConfig struct
// in chrome/browser/chromeos/printing/print_servers_manager.h.
[Stable]
struct PrintServersConfig {
  ServerPrintersFetchingMode fetching_mode@0;
  array<PrintServer> print_servers@1;
  // Used in chrome/browser/chromeos/printing/print_servers_policy_provider.h.
  [Stable, Extensible]
  enum ServerPrintersFetchingMode {
    // Use the first 16 print servers.
    [Default] kStandard,
    // Use print servers selected via ChoosePrintServers().
    kSingleServerOnly,
  };
};

[Stable]
struct PrintServer {
  string id@0;
  url.mojom.Url url@1;
  string name@2;
};

[Stable]
struct CapabilitiesResponse {
  // Basic information about the printer.
  LocalDestinationInfo basic_info@0;
  // Whether or not the protocol is secure (e.g. ipps).
  bool has_secure_protocol@1;
  // Printer capabilities and defaults corresponding to the
  // PrinterSemanticCapsAndDefaults class in printing/backend/print_backend.h.
  printing.mojom.PrinterSemanticCapsAndDefaults? capabilities@2;
  // The fields below are no longer used.
  // Bitmask of allowed color modes corresponding to the ColorModeRestriction
  // enum in printing/backend/printing_restrictions.h.
  uint32 allowed_color_modes_deprecated@3;
  // Bitmask of allowed duplex modes.
  uint32 allowed_duplex_modes_deprecated@4;
  uint32 allowed_pin_modes_deprecated_version_0@5;
  [MinVersion=1] printing.mojom.PinModeRestriction allowed_pin_modes_deprecated_version_1@9;
  printing.mojom.ColorModeRestriction default_color_mode_deprecated@6;
  printing.mojom.DuplexModeRestriction default_duplex_mode_deprecated@7;
  printing.mojom.PinModeRestriction default_pin_mode_deprecated@8;
};

// Global print policies that are not printer specific.
[Stable]
struct Policies {
  // The allowed value for the 'Headers and footers' checkbox, in Print Preview.
  OptionalBool print_header_footer_allowed@0;
  // The default value for the 'Headers and footers' checkbox, in Print Preview.
  OptionalBool print_header_footer_default@1;
  // A pref holding the allowed background graphics printing modes.
  BackgroundGraphicsModeRestriction allowed_background_graphics_modes@2;
  // A pref holding the default background graphics mode.
  BackgroundGraphicsModeRestriction background_graphics_default@3;
  // A pref holding the default paper size.
  gfx.mojom.Size? paper_size_default@4;
  // Indicates how many sheets is allowed to use for a single print job.
  uint32 max_sheets_allowed@5;
  bool max_sheets_allowed_has_value@6;
  // Bitmask of allowed color modes corresponding to the ColorModeRestriction
  // enum in printing/backend/printing_restrictions.h.
  [MinVersion=1] uint32 allowed_color_modes@7;
  // Bitmask of allowed duplex modes.
  [MinVersion=1] uint32 allowed_duplex_modes@8;
  [MinVersion=1] printing.mojom.PinModeRestriction allowed_pin_modes@9;
  [MinVersion=1] printing.mojom.ColorModeRestriction default_color_mode@10;
  [MinVersion=1] printing.mojom.DuplexModeRestriction default_duplex_mode@11;
  [MinVersion=1] printing.mojom.PinModeRestriction default_pin_mode@12;
  [MinVersion=2] OptionalBool default_print_pdf_as_image@13;
  // Allowed background graphics modes.
  // This is used in pref file and should never change.
  // Corresponds to enum class BackgroundGraphicsModeRestriction in
  // printing/backend/printing_restrictions.h.
  [Stable, Extensible]
  enum BackgroundGraphicsModeRestriction {
    [Default] kUnset = 0,
    kEnabled = 1,
    kDisabled = 2,
  };
  [Stable]
  enum OptionalBool {
    kUnset,
    kFalse,
    kTrue,
  };
};

// This interface is used to notify Lacros about print server events.
[Stable, Uuid="39885b28-cbc6-4878-834f-b0902d8e6fbf"]
interface PrintServerObserver {
  // Runs when the print server configuration is updated, e.g.
  // a new print server is added or discovered.
  OnPrintServersChanged@0(PrintServersConfig config);

  // Runs when printers have been fetched from a print server.
  // Lacros calls LocalPrinter::GetPrinters to update the printer list
  // each time this notification is received.
  OnServerPrintersChanged@1();
};

// Corresponds to functions in CupsPrintJobManager::Observer
// (chrome/browser/chromeos/printing/cups_print_job_manager.h).
[Stable, Extensible]
enum PrintJobStatus {
  [Default] kUnknown, // reserved
  kCreated,
  kStarted,
  kUpdated,
  kSuspended,
  kResumed,
  kDone,
  kError,
  kCancelled,
};

// This interface is used to notify Lacros about print job events.
[Stable, Uuid="a372ba50-7409-4c16-86b9-47a1725947d0"]
interface PrintJobObserver {
  // Runs when the status of a print job changes.
  OnPrintJobUpdate@0(string printer_id, uint32 job_id, PrintJobStatus status);
};

// Used to specify which source(s) to observe print jobs from.
[Stable, Extensible]
enum PrintJobSource {
 [Default] kAny, // reserved
 kExtension,
};

// This union of structs represents the OAuth-related status of a printer.
[Stable]
struct OAuthNotNeeded {};
[Stable]
struct OAuthError {};
[Stable]
struct OAuthAccessToken { string token; };
[Stable]
union GetOAuthAccessTokenResult {
  OAuthNotNeeded  none;
  OAuthError error;
  OAuthAccessToken token;
};

// This interface is used to query information about local printers
// associated with the current Ash profile that can be used for
// printing from Lacros.
[Stable, Uuid="81aea7f5-a52b-4f88-8037-951f3c174f1e"]
interface LocalPrinter {
  // Gets a list of printers. An empty array is returned on error.
  GetPrinters@0() => (array<LocalDestinationInfo> printers);

  // Gets capabilities for a printer as a CapabilitiesResponse object.
  // See chrome/browser/resources/print_preview/native_layer.js for a
  // detailed description of the CapabilitiesResponse object as well as
  // chrome/browser/resources/print_preview/data/ for descriptions of
  // the various sub-objects (such as the Cloud Device Description object).
  // The capabilities field (CapabilitiesResponse.capabilities) is null on
  // error. If the printer does not exist, null is returned.
  GetCapability@1(string printer_id) => (CapabilitiesResponse? capabilities);

  // Gets the PPD license url for a printer.
  // An empty url is returned if no such url exists.
  GetEulaUrl@2(string printer_id) => (url.mojom.Url url);

  // Gets the current status of a printer.
  // Note: this method queries the printer directly instead of via CUPS.
  // It may take several seconds for the printer to respond.
  GetStatus@3(string printer_id) => (PrinterStatus status);

  // Opens a system print settings window.
  ShowSystemPrintSettings@4() => ();

  // Adds a new print job to the ash print job manager.
  CreatePrintJob@5(PrintJob job) => ();

  // Cancels a print job. Forwards to CancelPrintJob() in
  // ash/webui/print_management/mojom/printing_manager.mojom.
  [MinVersion=3]
  CancelPrintJob@12(string printer_id, uint32 job_id) => (bool attempted);

  // Gets print server information.
  GetPrintServersConfig@6() => (PrintServersConfig config);

  // Selects print servers to query printers from.
  // Invalid print server IDs are ignored.
  // This function does nothing if the print server scaling feature
  // is disabled or the fetching mode is not kSingleServerOnly.
  ChoosePrintServers@7(array<string> print_server_ids) => ();

  // Adds a print server observer.
  AddPrintServerObserver@8(pending_remote<PrintServerObserver> observer) => ();

  // Gets print policies.
  GetPolicies@9() => (Policies policies);

  // Checks if |kPrintingSendUsernameAndFilenameEnabled| is enabled for the
  // current Ash profile. Returns the profile's corresponding username if pref
  // enabled.
  [MinVersion=1]
  GetUsernamePerPolicy@10() => (string? username);

  // Gets list of printers types included in the deny list policy.
  [MinVersion=2]
  GetPrinterTypeDenyList@11() => (array<printing.mojom.PrinterType> deny_list);

  // Adds a print job observer for print jobs from source `source`.
  [MinVersion=3]
  AddPrintJobObserver@13(
    pending_remote<PrintJobObserver> observer,
    PrintJobSource source) => ();

  // Checks if the printer requires an OAuth. If yes, returns the access token.
  [MinVersion=4]
  GetOAuthAccessToken@14(string printer_id)
    => (GetOAuthAccessTokenResult oauth_result);
};