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Kaleidoscope/src/kaleidoscope/event_handlers.h

92 lines
5.8 KiB

/* Kaleidoscope - Firmware for computer input devices
* Copyright (C) 2013-2018 Keyboard.io, Inc.
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
// This file defines the names and argument signatures for all event handlers
// in the Kaleidoscope core.
//
// When adding a new hook or event handler to Kaleidoscope, it needs only
// to be added here and to the place in the codebase where it should be called.
//
// _FOR_EACH_EVENT_HANDLER is what's called an "X Macro". Its first argument,
// OPERATION, is the name of another macro. When called, it will execute
// OPERATION once for each event handler defined herein with the following
// parameters:
//
// HOOK_NAME, SHOULD_ABORT_ON_CONSUMED_EVENT, SIGNATURE, ARGS_LIST, ...
//
// Any additional parameters that are added to an invokation
// of _FOR_EACH_EVENT_HANDLER are passed through to OP.
#define _ABORTABLE true
#define _NOT_ABORTABLE false
#define _FOR_EACH_EVENT_HANDLER(OPERATION, ...) __NL__ \
__NL__ \
OPERATION(onSetup, __NL__ \
_NOT_ABORTABLE, __NL__ \
(),(), ##__VA_ARGS__) __NL__ \
__NL__ \
/* Called at the very start of each cycle, before gathering */ __NL__ \
/* events, before doing anything else. */ __NL__ \
OPERATION(beforeEachCycle, __NL__ \
_NOT_ABORTABLE, __NL__ \
(), (), ##__VA_ARGS__) __NL__ \
__NL__ \
/* Function called for every non-idle key, every cycle, so it */ __NL__ \
/* can decide what to do with it. It can modify the key (which is */ __NL__ \
/* passed by reference for this reason), and decide whether */ __NL__ \
/* further handles should be tried. If it returns */ __NL__ \
/* EventHandlerResult::OK, other handlers will also get a chance */ __NL__ \
/* to react to the event. If it returns anything else, Kaleidoscope */ __NL__ \
/* will stop processing there. */ __NL__ \
OPERATION(onKeyswitchEvent, __NL__ \
_ABORTABLE, __NL__ \
(Key &mappedKey, byte row, byte col, uint8_t keyState), __NL__ \
(mappedKey, row, col, keyState), ##__VA_ARGS__) __NL__ \
__NL__ \
/* Called by an external plugin (such as Kaleidoscope-FocusSerial) */ __NL__ \
/* via Kaleidoscope::onFocusEvent. This is where Focus events can */ __NL__ \
/* be handled. The function can return EventHandlerResult::OK, and */ __NL__ \
/* allow other plugins to handle the same command (with the caveat */ __NL__ \
/* that arguments can only be parsed once), or */ __NL__ \
/* EventHandlerResult::EVENT_CONSUMED, in which case no other */ __NL__ \
/* plugin will have a chance to react to the event. */ __NL__ \
OPERATION(onFocusEvent, __NL__ \
_ABORTABLE, __NL__ \
(const char *command), __NL__ \
(command), ##__VA_ARGS__) __NL__ \
__NL__ \
/* Called when the layer state changes. Which layes changed are */ __NL__ \
/* not passed as arguments. If one needs that info, they should */ __NL__ \
/* track Layer.getState() themselves. */ __NL__ \
OPERATION(onLayerChange, __NL__ \
_NOT_ABORTABLE, __NL__ \
(), (), ##__VA_ARGS__) __NL__ \
/* Called before reporting our state to the host. This is the */ __NL__ \
/* last point in a cycle where a plugin can alter what gets */ __NL__ \
/* reported to the host. */ __NL__ \
OPERATION(beforeReportingState, __NL__ \
_NOT_ABORTABLE, __NL__ \
(),(),##__VA_ARGS__) __NL__ \
__NL__ \
/* Called at the very end of a cycle, after everything's */ __NL__ \
/* said and done. */ __NL__ \
OPERATION(afterEachCycle, __NL__ \
_NOT_ABORTABLE, __NL__ \
(),(),##__VA_ARGS__)