mirror of https://github.com/acidanthera/audk.git
150 lines
5.2 KiB
C
150 lines
5.2 KiB
C
/** @file
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Extension Form Browser Protocol provides the services that can be used to
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register the different hot keys for the standard Browser actions described in UEFI specification.
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Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __FORM_BROWSER_EXTENSION_H__
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#define __FORM_BROWSER_EXTENSION_H__
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#define FORM_BROWSER_EXTENSION_PROTOCOL_GUID \
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{ 0x1f73b18d, 0x4630, 0x43c1, { 0xa1, 0xde, 0x6f, 0x80, 0x85, 0x5d, 0x7d, 0xa4 } }
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typedef struct _EFI_FORM_BROWSER_EXTENSION_PROTOCOL EFI_FORM_BROWSER_EXTENSION_PROTOCOL;
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//
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// Return value of SAVE_REMINDER() that describes whether the changed data is saved or discarded.
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//
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#define BROWSER_NO_CHANGES 0
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#define BROWSER_SAVE_CHANGES 1
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#define BROWSER_DISCARD_CHANGES 2
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#define BROWSER_KEEP_CURRENT 3
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//
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// Browser actions. They can be cominbed together.
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// If more than one actions are specified, the action with low bit will be executed first.
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//
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#define BROWSER_ACTION_UNREGISTER 0
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#define BROWSER_ACTION_DISCARD BIT0
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#define BROWSER_ACTION_DEFAULT BIT1
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#define BROWSER_ACTION_SUBMIT BIT2
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#define BROWSER_ACTION_RESET BIT3
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#define BROWSER_ACTION_EXIT BIT4
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//
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// Scope for Browser action. It may be Form, FormSet or System level.
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//
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typedef enum {
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FormLevel,
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FormSetLevel,
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SystemLevel,
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MaxLevel
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} BROWSER_SETTING_SCOPE;
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/**
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Configure what scope the hot key will impact.
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All hot keys have the same scope. The mixed hot keys with the different level are not supported.
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If no scope is set, the default scope will be FormSet level.
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After all registered hot keys are removed, previous Scope can reset to another level.
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@param[in] Scope Scope level to be set.
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@retval EFI_SUCCESS Scope is set correctly.
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@retval EFI_INVALID_PARAMETER Scope is not the valid value specified in BROWSER_SETTING_SCOPE.
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@retval EFI_UNSPPORTED Scope level is different from current one that the registered hot keys have.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *SET_SCOPE) (
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IN BROWSER_SETTING_SCOPE Scope
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);
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/**
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Register the hot key with its browser action, or unregistered the hot key.
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If the action value is zero, the hot key will be unregistered if it has been registered.
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If the same hot key has been registered, the new action and help string will override the previous ones.
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@param[in] KeyData A pointer to a buffer that describes the keystroke
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information for the hot key. Its type is EFI_INPUT_KEY to
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be supported by all ConsoleIn devices.
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@param[in] Action Action value that describes what action will be trigged when the hot key is pressed.
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@param[in] DefaultId Specifies the type of defaults to retrieve, which is only for DEFAULT action.
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@param[in] HelpString Help string that describes the hot key information.
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Its value may be NULL for the unregistered hot key.
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@retval EFI_SUCCESS Hot key is registered or unregistered.
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@retval EFI_INVALID_PARAMETER KeyData is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *REGISTER_HOT_KEY) (
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IN EFI_INPUT_KEY *KeyData,
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IN UINT32 Action,
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IN UINT16 DefaultId,
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IN EFI_STRING HelpString OPTIONAL
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);
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/**
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This handler is responsbile for the left things on normal boot after all UI forms are closed.
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For example, it can continue to boot the first boot option.
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It will be used only when EXIT action is trigged as system level.
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**/
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typedef
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VOID
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(EFIAPI *EXIT_HANDLER) (
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VOID
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);
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/**
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Register Exit handler function.
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When more than one handler function is registered, the latter one will override the previous one.
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When NULL handler is specified, the previous Exit handler will be unregistered.
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@param[in] Handler Pointer to handler function.
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**/
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typedef
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VOID
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(EFIAPI *REGISTER_EXIT_HANDLER) (
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IN EXIT_HANDLER Handler
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);
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/**
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Create reminder to let user to choose save or discard the changed browser data.
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Caller can use it to actively check the changed browser data.
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@retval BROWSER_NO_CHANGES No browser data is changed.
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@retval BROWSER_SAVE_CHANGES The changed browser data is saved.
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@retval BROWSER_DISCARD_CHANGES The changed browser data is discard.
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@retval BROWSER_KEEP_CURRENT Browser keep current changes.
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**/
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typedef
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UINT32
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(EFIAPI *SAVE_REMINDER)(
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VOID
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);
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struct _EFI_FORM_BROWSER_EXTENSION_PROTOCOL {
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SET_SCOPE SetScope;
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REGISTER_HOT_KEY RegisterHotKey;
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REGISTER_EXIT_HANDLER RegiserExitHandler;
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SAVE_REMINDER SaveReminder;
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};
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extern EFI_GUID gEfiFormBrowserExProtocolGuid;
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#endif
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