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Cache native keyboard lock state across input-provider transitions and reconcile it with HID LED feedback over LGMP. Project raw and corrective lock-key transitions through the reliable input FIFO, defer correction until outstanding transitions settle, and recover from delayed or missing feedback without double toggling.
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_LG_CLIENT_INPUT_INTERFACE_
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#define _H_LG_CLIENT_INPUT_INTERFACE_
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#include <stdbool.h>
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#include <stdint.h>
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typedef enum LG_InputSupport
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{
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LG_INPUT_SUPPORT_MOUSE_ABSOLUTE,
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}
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LG_InputSupport;
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enum
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{
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LG_KEYBOARD_LED_NUM_LOCK = 0x1,
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LG_KEYBOARD_LED_CAPS_LOCK = 0x2,
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LG_KEYBOARD_LED_SCROLL_LOCK = 0x4,
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LG_KEYBOARD_LED_COMPOSE = 0x8,
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LG_KEYBOARD_LED_KANA = 0x10,
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};
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typedef struct LG_InputStatus
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{
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bool available;
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uint32_t generation;
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/* USB HID keyboard LED bits reported by the guest. */
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bool keyboardLEDsValid;
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uint8_t keyboardLEDs;
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}
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LG_InputStatus;
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typedef void (*LG_InputStatusFn)(void * opaque,
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const LG_InputStatus * status);
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typedef struct LG_InputOps
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{
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const char * name;
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/* Operations must fail safely if a remote endpoint disappears. */
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bool (*supports)(void * opaque, LG_InputSupport support);
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/* Registration must synchronously report the current status after releasing
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* any backend locks. Passing NULL unregisters the listener. */
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void (*setStatusListener)(void * opaque, LG_InputStatusFn callback,
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void * callbackOpaque);
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/* Keyboard codes use the Linux input-event KEY_* values. */
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bool (*keyDown)(void * opaque, int key);
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bool (*keyUp)(void * opaque, int key);
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bool (*keyboardLEDs)(void * opaque, bool numLock, bool capsLock,
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bool scrollLock);
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/* Cancel any queued host-to-guest lock-state reconciliation. */
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void (*keyboardLEDsReset)(void * opaque);
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bool (*mouseMotion)(void * opaque, int32_t x, int32_t y);
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/* Position is in guest pixels and must be within the supplied dimensions. */
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bool (*mousePosition)(void * opaque, uint32_t x, uint32_t y,
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uint32_t width, uint32_t height);
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/* Button order: left, middle, right, wheel up/down, then HID buttons 4+. */
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bool (*mousePress)(void * opaque, unsigned int button);
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bool (*mouseRelease)(void * opaque, unsigned int button);
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/* Restore all devices owned by this implementation to a neutral state.
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* This must safely tolerate the remote input endpoint becoming unavailable. */
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void (*reset)(void * opaque);
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}
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LG_InputOps;
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#endif
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