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Kaleidoscope/src/kaleidoscope/hooks.h

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/* 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
#include <Arduino.h>
namespace kaleidoscope {
union Key;
}
#include "kaleidoscope/plugin.h"
#include "kaleidoscope/event_handlers.h"
// Forward declaration required to enable friend declarations
// in class Hooks.
class kaleidoscope_;
extern void handleKeyswitchEvent(kaleidoscope::Key mappedKey, byte row, byte col, uint8_t keyState);
namespace kaleidoscope {
// Forward declaration to enable friend declarations.
class Layer_;
// The reason why the hook routing entry point functions live within
// class Hooks and not directly within a namespace is, that we want
// to restrict who is allowed to trigger hooks, mainly to prevent
// user code from calling hook methods.
//
// A note to maintainers: When you add new hooks that are supposed to
// be called from other places than the friend classes and functions listed
// below, just add a suitable friend declaration.
class Hooks {
// The following friend declarations restrict access to
// the hook routing system.
// Kaleidoscope_ calls Hooks::onSetup, Hooks::beforeReportingState
// and Hooks::afterEachCycle.
friend class Kaleidoscope_;
friend class ::kaleidoscope::Layer_;
// ::handleKeyswitchEvent(...) calls Hooks::onKeyswitchEvent.
friend void ::handleKeyswitchEvent(kaleidoscope::Key mappedKey,
byte row, byte col, uint8_t keyState);
private:
// The following private functions are just to be called by classes
// and functions that are declared as friends above.
#define DEFINE_WEAK_HOOK_FUNCTION( \
HOOK_NAME, SHOULD_ABORT_ON_CONSUMED_EVENT, SIGNATURE, ARGS_LIST) __NL__ \
__NL__ \
static EventHandlerResult HOOK_NAME SIGNATURE;
_FOR_EACH_EVENT_HANDLER(DEFINE_WEAK_HOOK_FUNCTION)
#undef DEFINE_WEAK_HOOK_FUNCTION
};
}