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refactor(event) move event related functions to a dedicated file (core/lv_event.c/h)

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This commit is contained in:
Gabor Kiss-Vamosi
2021-04-24 17:04:12 +02:00
parent d377552a9c
commit 38b4ff6b4c
4 changed files with 528 additions and 471 deletions
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305
src/core/lv_obj.c
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@@ -42,17 +42,6 @@
/**********************
* TYPEDEFS
**********************/
typedef struct _lv_event_temp_data {
lv_obj_t * obj;
bool deleted;
struct _lv_event_temp_data * prev;
} lv_event_temp_data_t;
typedef struct _lv_event_dsc_t{
lv_event_cb_t cb;
void * user_data;
lv_event_code_t filter :8;
}lv_event_dsc_t;
/**********************
* STATIC PROTOTYPES
@@ -64,19 +53,13 @@ static void lv_obj_event(const lv_obj_class_t * class_p, lv_event_t * e);
static void draw_scrollbar(lv_obj_t * obj, const lv_area_t * clip_area);
static lv_res_t scrollbar_init_draw_dsc(lv_obj_t * obj, lv_draw_rect_dsc_t * dsc);
static bool obj_valid_child(const lv_obj_t * parent, const lv_obj_t * obj_to_find);
static lv_res_t event_send_core(lv_obj_t * obj, lv_event_code_t event_code, void * param);
static void lv_obj_set_state(lv_obj_t * obj, lv_state_t new_state);
static void base_dir_refr_children(lv_obj_t * obj);
static bool event_is_bubbled(lv_event_code_t e);
/**********************
* STATIC VARIABLES
**********************/
static bool lv_initialized = false;
static lv_event_temp_data_t * event_temp_data_head;
static void * event_act_param;
static void * event_act_user_data_cb;
static lv_obj_t * event_original_target;
const lv_obj_class_t lv_obj_class = {
.constructor_cb = lv_obj_constructor,
.destructor_cb = lv_obj_destructor,
@@ -92,11 +75,6 @@ const lv_obj_class_t lv_obj_class = {
/**********************
* MACROS
**********************/
#if LV_LOG_TRACE_EVENT
# define EVENT_TRACE(...) LV_LOG_TRACE( __VA_ARGS__)
#else
# define EVENT_TRACE(...)
#endif
/**********************
* GLOBAL FUNCTIONS
@@ -199,112 +177,6 @@ lv_obj_t * lv_obj_create(lv_obj_t * parent)
return lv_obj_create_from_class(&lv_obj_class, parent);
}
/*---------------------
* Event/Signal sending
*---------------------*/
lv_res_t lv_event_send(lv_obj_t * obj, lv_event_code_t event, void * param)
{
if(obj == NULL) return LV_RES_OK;
LV_ASSERT_OBJ(obj, MY_CLASS);
/*Save the original target first in tmp variable because nested `lv_event_send` calls can overwrite it*/
lv_obj_t * event_original_target_tmp = event_original_target;
event_original_target = obj;
/*Send the event*/
lv_res_t res = event_send_core(obj, event, param);
/*Restore the original target*/
event_original_target = event_original_target_tmp;
return res;
}
lv_res_t lv_obj_event_base(const lv_obj_class_t * class_p, lv_event_t * e)
{
const lv_obj_class_t * base;
if(class_p == NULL) base = e->target->class_p;
else base = class_p->base_class;
/*Find a base in which Call the ancestor's event handler_cb is set*/
while(base && base->event_cb == NULL) base = base->base_class;
if(base == NULL) return LV_RES_OK;
if(base->event_cb == NULL) return LV_RES_OK;
/* Build a simple linked list from the objects used in the events
* It's important to know if an this object was deleted by a nested event
* called from this `event_cb`. */
lv_event_temp_data_t event_temp_data;
event_temp_data.obj = e->target;
event_temp_data.deleted = false;
event_temp_data.prev = NULL;
if(event_temp_data_head) {
event_temp_data.prev = event_temp_data_head;
}
event_temp_data_head = &event_temp_data;
/*Call the actual event callback*/
e->user_data = NULL;
base->event_cb(base, e);
lv_res_t res = LV_RES_OK;
/*Stop if the object is deleted*/
if(event_temp_data.deleted) res = LV_RES_INV;
/*Remove this element from the list*/
event_temp_data_head = event_temp_data_head->prev;
return res;
}
lv_obj_t * lv_event_get_target(lv_event_t * e)
{
return e->target;
}
lv_event_code_t lv_event_get_code(lv_event_t * e)
{
return e->code;
}
void * lv_event_get_param(lv_event_t * e)
{
return e->param;
}
void * lv_event_get_user_data(lv_event_t * e)
{
return e->user_data;
}
lv_obj_t * lv_event_get_original_target(void)
{
return event_original_target;
}
uint32_t lv_event_register_id(void)
{
static uint32_t last_id = _LV_EVENT_LAST;
last_id ++;
return last_id;
}
void _lv_event_mark_deleted(lv_obj_t * obj)
{
lv_event_temp_data_t * t = event_temp_data_head;
while(t) {
if(t->obj == obj) t->deleted = true;
t = t->prev;
}
}
/*=====================
* Setter functions
*====================*/
@@ -372,70 +244,6 @@ void lv_obj_clear_state(lv_obj_t * obj, lv_state_t state)
}
}
struct _lv_event_dsc_t * lv_obj_add_event_cb(lv_obj_t * obj, lv_event_cb_t event_cb, lv_event_code_t filter, void * user_data)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_obj_allocate_spec_attr(obj);
obj->spec_attr->event_dsc_cnt++;
obj->spec_attr->event_dsc = lv_mem_realloc(obj->spec_attr->event_dsc, obj->spec_attr->event_dsc_cnt * sizeof(lv_event_dsc_t));
LV_ASSERT_MALLOC(obj->spec_attr->event_dsc);
obj->spec_attr->event_dsc[obj->spec_attr->event_dsc_cnt - 1].cb = event_cb;
obj->spec_attr->event_dsc[obj->spec_attr->event_dsc_cnt - 1].filter = filter;
obj->spec_attr->event_dsc[obj->spec_attr->event_dsc_cnt - 1].user_data = user_data;
return &obj->spec_attr->event_dsc[obj->spec_attr->event_dsc_cnt - 1];
}
bool lv_obj_remove_event_cb(lv_obj_t * obj, lv_event_cb_t event_cb)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
if(obj->spec_attr == NULL) return false;
int32_t i = 0;
for(i = 0; i < obj->spec_attr->event_dsc_cnt; i++) {
if(obj->spec_attr->event_dsc[i].cb == event_cb) {
/*Shift the remaining event handlers forward*/
for(; i < (obj->spec_attr->event_dsc_cnt-1); i++) {
obj->spec_attr->event_dsc[i].cb = obj->spec_attr->event_dsc[i+1].cb;
obj->spec_attr->event_dsc[i].user_data = obj->spec_attr->event_dsc[i+1].user_data;
}
obj->spec_attr->event_dsc_cnt--;
obj->spec_attr->event_dsc = lv_mem_realloc(obj->spec_attr->event_dsc, obj->spec_attr->event_dsc_cnt * sizeof(lv_event_dsc_t));
LV_ASSERT_MALLOC(obj->spec_attr->event_dsc);
return true;
}
}
/*No event handler found*/
return false;
}
bool lv_obj_remove_event_dsc(lv_obj_t * obj, struct _lv_event_dsc_t * event_dsc)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
if(obj->spec_attr == NULL) return false;
int32_t i = 0;
for(i = 0; i < obj->spec_attr->event_dsc_cnt; i++) {
if(&obj->spec_attr->event_dsc[i] == event_dsc) {
/*Shift the remaining event handlers forward*/
for(; i < (obj->spec_attr->event_dsc_cnt-1); i++) {
obj->spec_attr->event_dsc[i].cb = obj->spec_attr->event_dsc[i+1].cb;
obj->spec_attr->event_dsc[i].user_data = obj->spec_attr->event_dsc[i+1].user_data;
}
obj->spec_attr->event_dsc_cnt--;
obj->spec_attr->event_dsc = lv_mem_realloc(obj->spec_attr->event_dsc, obj->spec_attr->event_dsc_cnt * sizeof(lv_event_dsc_t));
LV_ASSERT_MALLOC(obj->spec_attr->event_dsc);
return true;
}
}
/*No event handler found*/
return false;
}
void lv_obj_set_base_dir(lv_obj_t * obj, lv_bidi_dir_t dir)
{
if(dir != LV_BIDI_DIR_LTR && dir != LV_BIDI_DIR_RTL &&
@@ -512,16 +320,6 @@ bool lv_obj_has_state(const lv_obj_t * obj, lv_state_t state)
return obj->state & state ? true : false;
}
lv_event_dsc_t * lv_obj_get_event_dsc(const lv_obj_t * obj, uint32_t id)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
if(!obj->spec_attr) return NULL;
if(id >= obj->spec_attr->event_dsc_cnt) return NULL;
return &obj->spec_attr->event_dsc[id];
}
void * lv_obj_get_group(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
@@ -1050,7 +848,6 @@ static void base_dir_refr_children(lv_obj_t * obj)
}
}
static bool obj_valid_child(const lv_obj_t * parent, const lv_obj_t * obj_to_find)
{
@@ -1072,105 +869,3 @@ static bool obj_valid_child(const lv_obj_t * parent, const lv_obj_t * obj_to_fin
}
return false;
}
static lv_res_t event_send_core(lv_obj_t * obj, lv_event_code_t event_code, void * param)
{
EVENT_TRACE("Sending event %d to %p with %p param", event_code, obj, param);
/*Build a simple linked list from the objects used in the events
*It's important to know if an this object was deleted by a nested event
*called from this `event_cb`.*/
lv_event_temp_data_t event_temp_data;
event_temp_data.obj = obj;
event_temp_data.deleted = false;
event_temp_data.prev = NULL;
if(event_temp_data_head) {
event_temp_data.prev = event_temp_data_head;
}
event_temp_data_head = &event_temp_data;
/*There could be nested event sending with different param.
*It needs to be saved for the current event context because `lv_event_get_data` returns a global param.*/
void * event_act_param_save = event_act_param;
event_act_param = param;
/*Call the input device's feedback callback if set*/
lv_indev_t * indev_act = lv_indev_get_act();
if(indev_act) {
if(indev_act->driver->feedback_cb) indev_act->driver->feedback_cb(indev_act->driver, event_code);
}
lv_event_dsc_t * event_dsc = lv_obj_get_event_dsc(obj, 0);
lv_res_t res = LV_RES_OK;
lv_event_t e;
e.code = event_code;
e.target = obj;
e.original_target = obj;
e.param = param;
res = lv_obj_event_base(NULL, &e);
uint32_t i = 0;
while(event_dsc && res == LV_RES_OK) {
if(event_dsc->cb && (event_dsc->filter == LV_EVENT_ALL || event_dsc->filter == event_code)) {
void * event_act_user_data_cb_save = event_act_user_data_cb;
event_act_user_data_cb = event_dsc->user_data;
e.user_data = event_dsc->user_data;
event_dsc->cb(&e);
event_act_user_data_cb = event_act_user_data_cb_save;
/*Stop if the object is deleted*/
if(event_temp_data.deleted) {
res = LV_RES_INV;
break;
}
}
i++;
event_dsc = lv_obj_get_event_dsc(obj, i);
}
/*Restore the event_code param*/
event_act_param = event_act_param_save;
/*Remove this element from the list*/
event_temp_data_head = event_temp_data_head->prev;
if(res == LV_RES_OK && event_is_bubbled(event_code)) {
if(lv_obj_has_flag(obj, LV_OBJ_FLAG_EVENT_BUBBLE) && obj->parent) {
res = event_send_core(obj->parent, event_code, param);
if(res != LV_RES_OK) return LV_RES_INV;
}
}
return res;
}
static bool event_is_bubbled(lv_event_code_t e)
{
switch(e) {
case LV_EVENT_HIT_TEST:
case LV_EVENT_COVER_CHECK:
case LV_EVENT_REFR_EXT_DRAW_SIZE:
case LV_EVENT_DRAW_MAIN_BEGIN:
case LV_EVENT_DRAW_MAIN:
case LV_EVENT_DRAW_MAIN_END:
case LV_EVENT_DRAW_POST_BEGIN:
case LV_EVENT_DRAW_POST:
case LV_EVENT_DRAW_POST_END:
case LV_EVENT_DRAW_PART_BEGIN:
case LV_EVENT_DRAW_PART_END:
case LV_EVENT_REFRESH:
case LV_EVENT_DELETE:
case LV_EVENT_CHILD_CHANGED:
case LV_EVENT_SIZE_CHANGED:
case LV_EVENT_STYLE_CHANGED:
case LV_EVENT_GET_SELF_SIZE:
return false;
default:
return true;
}
}