scrcpy/app/src/input_manager.c

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#include "input_manager.h"
#include <SDL2/SDL_assert.h>
#include "convert.h"
#include "lock_util.h"
#include "log.h"
// Convert window coordinates (as provided by SDL_GetMouseState() to renderer
// coordinates (as provided in SDL mouse events)
//
// See my question:
// <https://stackoverflow.com/questions/49111054/how-to-get-mouse-position-on-mouse-wheel-event>
static void
convert_to_renderer_coordinates(SDL_Renderer *renderer, int *x, int *y) {
SDL_Rect viewport;
float scale_x, scale_y;
SDL_RenderGetViewport(renderer, &viewport);
SDL_RenderGetScale(renderer, &scale_x, &scale_y);
*x = (int) (*x / scale_x) - viewport.x;
*y = (int) (*y / scale_y) - viewport.y;
}
static struct point
get_mouse_point(struct screen *screen) {
int x;
int y;
SDL_GetMouseState(&x, &y);
convert_to_renderer_coordinates(screen->renderer, &x, &y);
return (struct point) {
.x = x,
.y = y,
};
}
static const int ACTION_DOWN = 1;
static const int ACTION_UP = 1 << 1;
static void
send_keycode(struct controller *controller, enum android_keycode keycode,
int actions, const char *name) {
// send DOWN event
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_INJECT_KEYCODE;
msg.inject_keycode.keycode = keycode;
msg.inject_keycode.metastate = 0;
if (actions & ACTION_DOWN) {
msg.inject_keycode.action = AKEY_EVENT_ACTION_DOWN;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'inject %s (DOWN)'", name);
return;
}
}
if (actions & ACTION_UP) {
msg.inject_keycode.action = AKEY_EVENT_ACTION_UP;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'inject %s (UP)'", name);
}
}
}
static inline void
action_home(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_HOME, actions, "HOME");
}
static inline void
action_back(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_BACK, actions, "BACK");
}
static inline void
action_app_switch(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_APP_SWITCH, actions, "APP_SWITCH");
}
static inline void
action_power(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_POWER, actions, "POWER");
}
static inline void
action_volume_up(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_VOLUME_UP, actions, "VOLUME_UP");
}
static inline void
action_volume_down(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_VOLUME_DOWN, actions, "VOLUME_DOWN");
}
static inline void
action_menu(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_MENU, actions, "MENU");
}
// turn the screen on if it was off, press BACK otherwise
static void
press_back_or_turn_screen_on(struct controller *controller) {
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'turn screen on'");
}
}
static void
expand_notification_panel(struct controller *controller) {
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'expand notification panel'");
}
}
static void
collapse_notification_panel(struct controller *controller) {
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'collapse notification panel'");
}
}
static void
request_device_clipboard(struct controller *controller) {
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_GET_CLIPBOARD;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request device clipboard");
}
}
static void
set_device_clipboard(struct controller *controller) {
char *text = SDL_GetClipboardText();
if (!text) {
LOGW("Cannot get clipboard text: %s", SDL_GetError());
return;
}
if (!*text) {
// empty text
SDL_free(text);
return;
}
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_SET_CLIPBOARD;
msg.set_clipboard.text = text;
if (!controller_push_msg(controller, &msg)) {
SDL_free(text);
LOGW("Cannot request 'set device clipboard'");
}
}
static void
set_screen_power_mode(struct controller *controller,
enum screen_power_mode mode) {
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE;
msg.set_screen_power_mode.mode = mode;
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'set screen power mode'");
}
}
static void
switch_fps_counter_state(struct fps_counter *fps_counter) {
// the started state can only be written from the current thread, so there
// is no ToCToU issue
if (fps_counter_is_started(fps_counter)) {
fps_counter_stop(fps_counter);
LOGI("FPS counter stopped");
} else {
if (fps_counter_start(fps_counter)) {
LOGI("FPS counter started");
} else {
LOGE("FPS counter starting failed");
}
}
}
static void
clipboard_paste(struct controller *controller) {
char *text = SDL_GetClipboardText();
if (!text) {
LOGW("Cannot get clipboard text: %s", SDL_GetError());
return;
}
if (!*text) {
// empty text
SDL_free(text);
return;
}
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_INJECT_TEXT;
msg.inject_text.text = text;
if (!controller_push_msg(controller, &msg)) {
SDL_free(text);
LOGW("Cannot request 'paste clipboard'");
}
}
void
input_manager_process_text_input(struct input_manager *input_manager,
const SDL_TextInputEvent *event) {
char c = event->text[0];
if (isalpha(c) || c == ' ') {
SDL_assert(event->text[1] == '\0');
// letters and space are handled as raw key event
return;
}
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_INJECT_TEXT;
msg.inject_text.text = SDL_strdup(event->text);
if (!msg.inject_text.text) {
LOGW("Cannot strdup input text");
return;
}
if (!controller_push_msg(input_manager->controller, &msg)) {
SDL_free(msg.inject_text.text);
LOGW("Cannot request 'inject text'");
}
}
void
input_manager_process_key(struct input_manager *input_manager,
const SDL_KeyboardEvent *event,
bool control) {
// control: indicates the state of the command-line option --no-control
// ctrl: the Ctrl key
bool ctrl = event->keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
bool alt = event->keysym.mod & (KMOD_LALT | KMOD_RALT);
bool meta = event->keysym.mod & (KMOD_LGUI | KMOD_RGUI);
if (alt) {
// no shortcut involves Alt or Meta, and they should not be forwarded
// to the device
return;
}
struct controller *controller = input_manager->controller;
// capture all Ctrl events
if (ctrl | meta) {
SDL_Keycode keycode = event->keysym.sym;
bool down = event->type == SDL_KEYDOWN;
int action = down ? ACTION_DOWN : ACTION_UP;
bool repeat = event->repeat;
bool shift = event->keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
switch (keycode) {
case SDLK_h:
if (control && ctrl && !meta && !shift && !repeat) {
action_home(controller, action);
}
return;
case SDLK_b: // fall-through
case SDLK_BACKSPACE:
if (control && ctrl && !meta && !shift && !repeat) {
action_back(controller, action);
}
return;
case SDLK_s:
if (control && ctrl && !meta && !shift && !repeat) {
action_app_switch(controller, action);
}
return;
case SDLK_m:
if (control && ctrl && !meta && !shift && !repeat) {
action_menu(controller, action);
}
return;
case SDLK_p:
if (control && ctrl && !meta && !shift && !repeat) {
action_power(controller, action);
}
return;
case SDLK_o:
if (control && ctrl && !shift && !meta && down) {
set_screen_power_mode(controller, SCREEN_POWER_MODE_OFF);
}
return;
case SDLK_DOWN:
#ifdef __APPLE__
if (control && !ctrl && meta && !shift) {
#else
if (control && ctrl && !meta && !shift) {
#endif
// forward repeated events
action_volume_down(controller, action);
}
return;
case SDLK_UP:
#ifdef __APPLE__
if (control && !ctrl && meta && !shift) {
#else
if (control && ctrl && !meta && !shift) {
#endif
// forward repeated events
action_volume_up(controller, action);
}
return;
case SDLK_c:
if (control && ctrl && !meta && !shift && !repeat && down) {
request_device_clipboard(controller);
}
return;
case SDLK_v:
if (control && ctrl && !meta && !repeat && down) {
if (shift) {
// store the text in the device clipboard
set_device_clipboard(controller);
} else {
// inject the text as input events
clipboard_paste(controller);
}
}
return;
case SDLK_f:
if (ctrl && !meta && !shift && !repeat && down) {
screen_switch_fullscreen(input_manager->screen);
}
return;
case SDLK_x:
if (ctrl && !meta && !shift && !repeat && down) {
screen_resize_to_fit(input_manager->screen);
}
return;
case SDLK_g:
if (ctrl && !meta && !shift && !repeat && down) {
screen_resize_to_pixel_perfect(input_manager->screen);
}
return;
case SDLK_i:
if (ctrl && !meta && !shift && !repeat && down) {
struct fps_counter *fps_counter =
input_manager->video_buffer->fps_counter;
switch_fps_counter_state(fps_counter);
}
return;
case SDLK_n:
if (control && ctrl && !meta && !repeat && down) {
if (shift) {
collapse_notification_panel(controller);
} else {
expand_notification_panel(controller);
}
}
return;
}
return;
}
if (!control) {
return;
}
struct control_msg msg;
if (input_key_from_sdl_to_android(event, &msg)) {
if (!controller_push_msg(controller, &msg)) {
LOGW("Cannot request 'inject keycode'");
}
}
}
void
input_manager_process_mouse_motion(struct input_manager *input_manager,
const SDL_MouseMotionEvent *event) {
if (!event->state) {
// do not send motion events when no button is pressed
return;
}
struct control_msg msg;
if (mouse_motion_from_sdl_to_android(event,
input_manager->screen->frame_size,
&msg)) {
if (!controller_push_msg(input_manager->controller, &msg)) {
LOGW("Cannot request 'inject mouse motion event'");
}
}
}
static bool
is_outside_device_screen(struct input_manager *input_manager, int x, int y)
{
return x < 0 || x >= input_manager->screen->frame_size.width ||
y < 0 || y >= input_manager->screen->frame_size.height;
}
void
input_manager_process_mouse_button(struct input_manager *input_manager,
const SDL_MouseButtonEvent *event,
bool control) {
if (event->type == SDL_MOUSEBUTTONDOWN) {
if (control && event->button == SDL_BUTTON_RIGHT) {
press_back_or_turn_screen_on(input_manager->controller);
return;
}
if (control && event->button == SDL_BUTTON_MIDDLE) {
action_home(input_manager->controller, ACTION_DOWN | ACTION_UP);
return;
}
// double-click on black borders resize to fit the device screen
if (event->button == SDL_BUTTON_LEFT && event->clicks == 2) {
bool outside =
is_outside_device_screen(input_manager, event->x, event->y);
if (outside) {
screen_resize_to_fit(input_manager->screen);
return;
}
}
// otherwise, send the click event to the device
}
if (!control) {
return;
}
struct control_msg msg;
if (mouse_button_from_sdl_to_android(event,
input_manager->screen->frame_size,
&msg)) {
if (!controller_push_msg(input_manager->controller, &msg)) {
LOGW("Cannot request 'inject mouse button event'");
}
}
}
void
input_manager_process_mouse_wheel(struct input_manager *input_manager,
const SDL_MouseWheelEvent *event) {
struct position position = {
.screen_size = input_manager->screen->frame_size,
.point = get_mouse_point(input_manager->screen),
};
struct control_msg msg;
if (mouse_wheel_from_sdl_to_android(event, position, &msg)) {
if (!controller_push_msg(input_manager->controller, &msg)) {
LOGW("Cannot request 'inject mouse wheel event'");
}
}
}