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Feature: input processor behavior invocation (#2714)

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refactor(pointing): Allow stopping event propagation

    Allow input processors to return a special value if a given input event
    should not be further processed/propagated.

feat(pointing): Add behavior input processor

    Add the ability to intercept certain input events and trigger behaviors
    when they occur.

Co-authored-by: Jorge Villalobos <minusfive@users.noreply.github.com>
Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
This commit is contained in:
Pete Johanson
2024-12-17 18:50:06 -07:00
committed by GitHub
parent d0016b34f8
commit cb867f92db
25 changed files with 455 additions and 36 deletions
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92
app/src/pointing/input_processor_behaviors.c Normal file
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/*
* Copyright (c) 2024 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#define DT_DRV_COMPAT zmk_input_processor_behaviors
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <drivers/input_processor.h>
#include <zephyr/logging/log.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#include <zmk/keymap.h>
#include <zmk/behavior.h>
#include <zmk/virtual_key_position.h>
struct ip_behaviors_config {
uint8_t index;
size_t size;
uint16_t type;
const uint16_t *codes;
const struct zmk_behavior_binding *bindings;
};
static int ip_behaviors_handle_event(const struct device *dev, struct input_event *event,
uint32_t param1, uint32_t param2,
struct zmk_input_processor_state *state) {
const struct ip_behaviors_config *cfg = dev->config;
if (event->type != cfg->type) {
return 0;
}
for (size_t i = 0; i < cfg->size; i++) {
if (cfg->codes[i] == event->code) {
struct zmk_behavior_binding_event behavior_event = {
.position = ZMK_VIRTUAL_KEY_POSITION_BEHAVIOR_INPUT_PROCESSOR(
state->input_device_index, cfg->index),
.timestamp = k_uptime_get(),
#if IS_ENABLED(CONFIG_ZMK_SPLIT)
.source = ZMK_POSITION_STATE_CHANGE_SOURCE_LOCAL,
#endif
};
LOG_DBG("FOUND A MATCHING CODE, invoke %s for position %d with %d listeners",
cfg->bindings[i].behavior_dev, behavior_event.position,
ZMK_INPUT_LISTENERS_LEN);
int ret = zmk_behavior_invoke_binding(&cfg->bindings[i], behavior_event, event->value);
if (ret < 0) {
return ret;
}
return ZMK_INPUT_PROC_STOP;
}
}
return 0;
}
static struct zmk_input_processor_driver_api ip_behaviors_driver_api = {
.handle_event = ip_behaviors_handle_event,
};
static int ip_behaviors_init(const struct device *dev) { return 0; }
#define ENTRY(i, node) ZMK_KEYMAP_EXTRACT_BINDING(i, node)
#define IP_BEHAVIORS_INST(n) \
static const uint16_t ip_behaviors_codes_##n[] = DT_INST_PROP(n, codes); \
static const struct zmk_behavior_binding ip_behaviors_bindings_##n[] = { \
LISTIFY(DT_INST_PROP_LEN(n, bindings), ZMK_KEYMAP_EXTRACT_BINDING, (, ), DT_DRV_INST(n))}; \
BUILD_ASSERT(ARRAY_SIZE(ip_behaviors_codes_##n) == ARRAY_SIZE(ip_behaviors_bindings_##n), \
"codes and bindings need to be the same length"); \
static const struct ip_behaviors_config ip_behaviors_config_##n = { \
.index = n, \
.type = DT_INST_PROP_OR(n, type, INPUT_EV_KEY), \
.size = DT_INST_PROP_LEN(n, codes), \
.codes = ip_behaviors_codes_##n, \
.bindings = ip_behaviors_bindings_##n, \
}; \
DEVICE_DT_INST_DEFINE(n, &ip_behaviors_init, NULL, NULL, &ip_behaviors_config_##n, \
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, \
&ip_behaviors_driver_api);
DT_INST_FOREACH_STATUS_OKAY(IP_BEHAVIORS_INST)