scrcpy/app/src/input_manager.c

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#include "input_manager.h"
#include <assert.h>
#include "config.h"
#include "event_converter.h"
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#include "util/lock.h"
#include "util/log.h"
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)) {
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LOGW("Could not request 'inject %s (DOWN)'", name);
return;
}
}
if (actions & ACTION_UP) {
msg.inject_keycode.action = AKEY_EVENT_ACTION_UP;
if (!controller_push_msg(controller, &msg)) {
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LOGW("Could not 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("Could not request 'press back or 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)) {
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LOGW("Could not 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)) {
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LOGW("Could not 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)) {
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LOGW("Could not request device clipboard");
}
}
static void
set_device_clipboard(struct controller *controller) {
char *text = SDL_GetClipboardText();
if (!text) {
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LOGW("Could not 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);
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LOGW("Could not 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)) {
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LOGW("Could not 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) {
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LOGW("Could not 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);
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LOGW("Could not request 'paste clipboard'");
}
}
static void
rotate_device(struct controller *controller) {
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_ROTATE_DEVICE;
if (!controller_push_msg(controller, &msg)) {
LOGW("Could not request device rotation");
}
}
static void
rotate_client_left(struct screen *screen) {
unsigned new_rotation = (screen->rotation + 1) % 4;
screen_set_rotation(screen, new_rotation);
}
static void
rotate_client_right(struct screen *screen) {
unsigned new_rotation = (screen->rotation + 3) % 4;
screen_set_rotation(screen, new_rotation);
}
void
input_manager_process_text_input(struct input_manager *im,
const SDL_TextInputEvent *event) {
if (!im->prefer_text) {
char c = event->text[0];
if (isalpha(c) || c == ' ') {
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) {
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LOGW("Could not strdup input text");
return;
}
if (!controller_push_msg(im->controller, &msg)) {
SDL_free(msg.inject_text.text);
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LOGW("Could not request 'inject text'");
}
}
static bool
convert_input_key(const SDL_KeyboardEvent *from, struct control_msg *to,
bool prefer_text) {
to->type = CONTROL_MSG_TYPE_INJECT_KEYCODE;
if (!convert_keycode_action(from->type, &to->inject_keycode.action)) {
return false;
}
uint16_t mod = from->keysym.mod;
if (!convert_keycode(from->keysym.sym, &to->inject_keycode.keycode, mod,
prefer_text)) {
return false;
}
to->inject_keycode.metastate = convert_meta_state(mod);
return true;
}
void
input_manager_process_key(struct input_manager *im,
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);
// use Cmd on macOS, Ctrl on other platforms
#ifdef __APPLE__
bool cmd = !ctrl && meta;
#else
if (meta) {
// no shortcuts involve Meta on platforms other than macOS, and it must
// not be forwarded to the device
return;
}
bool cmd = ctrl; // && !meta, already guaranteed
#endif
if (alt) {
// no shortcuts involve Alt, and it must not be forwarded to the device
return;
}
struct controller *controller = im->controller;
// capture all Ctrl events
if (ctrl || cmd) {
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:
// Ctrl+h on all platform, since Cmd+h is already captured by
// the system on macOS to hide the window
if (control && ctrl && !meta && !shift && !repeat) {
action_home(controller, action);
}
return;
case SDLK_b: // fall-through
case SDLK_BACKSPACE:
if (control && cmd && !shift && !repeat) {
action_back(controller, action);
}
return;
case SDLK_s:
if (control && cmd && !shift && !repeat) {
action_app_switch(controller, action);
}
return;
case SDLK_m:
// Ctrl+m on all platform, since Cmd+m is already captured by
// the system on macOS to minimize the window
if (control && ctrl && !meta && !shift && !repeat) {
action_menu(controller, action);
}
return;
case SDLK_p:
if (control && cmd && !shift && !repeat) {
action_power(controller, action);
}
return;
case SDLK_o:
if (control && cmd && !shift && down) {
set_screen_power_mode(controller, SCREEN_POWER_MODE_OFF);
}
return;
case SDLK_DOWN:
if (control && cmd && !shift) {
// forward repeated events
action_volume_down(controller, action);
}
return;
case SDLK_UP:
if (control && cmd && !shift) {
// forward repeated events
action_volume_up(controller, action);
}
return;
case SDLK_LEFT:
if (cmd && !shift && down) {
rotate_client_left(im->screen);
}
return;
case SDLK_RIGHT:
if (cmd && !shift && down) {
rotate_client_right(im->screen);
}
return;
case SDLK_c:
if (control && cmd && !shift && !repeat && down) {
request_device_clipboard(controller);
}
return;
case SDLK_v:
if (control && cmd && !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 (!shift && cmd && !repeat && down) {
screen_switch_fullscreen(im->screen);
}
return;
case SDLK_x:
if (!shift && cmd && !repeat && down) {
screen_resize_to_fit(im->screen);
}
return;
case SDLK_g:
if (!shift && cmd && !repeat && down) {
screen_resize_to_pixel_perfect(im->screen);
}
return;
case SDLK_i:
if (!shift && cmd && !repeat && down) {
struct fps_counter *fps_counter =
im->video_buffer->fps_counter;
switch_fps_counter_state(fps_counter);
}
return;
case SDLK_n:
if (control && cmd && !repeat && down) {
if (shift) {
collapse_notification_panel(controller);
} else {
expand_notification_panel(controller);
}
}
return;
case SDLK_r:
if (control && cmd && !shift && !repeat && down) {
rotate_device(controller);
}
return;
}
return;
}
if (!control) {
return;
}
struct control_msg msg;
if (convert_input_key(event, &msg, im->prefer_text)) {
if (!controller_push_msg(controller, &msg)) {
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LOGW("Could not request 'inject keycode'");
}
}
}
static bool
convert_mouse_motion(const SDL_MouseMotionEvent *from, struct screen *screen,
struct control_msg *to) {
to->type = CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT;
to->inject_touch_event.action = AMOTION_EVENT_ACTION_MOVE;
to->inject_touch_event.pointer_id = POINTER_ID_MOUSE;
to->inject_touch_event.position.screen_size = screen->frame_size;
to->inject_touch_event.position.point =
screen_convert_to_frame_coords(screen, from->x, from->y);
to->inject_touch_event.pressure = 1.f;
to->inject_touch_event.buttons = convert_mouse_buttons(from->state);
return true;
}
void
input_manager_process_mouse_motion(struct input_manager *im,
const SDL_MouseMotionEvent *event) {
if (!event->state) {
// do not send motion events when no button is pressed
return;
}
if (event->which == SDL_TOUCH_MOUSEID) {
// simulated from touch events, so it's a duplicate
return;
}
struct control_msg msg;
if (convert_mouse_motion(event, im->screen, &msg)) {
if (!controller_push_msg(im->controller, &msg)) {
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LOGW("Could not request 'inject mouse motion event'");
}
}
}
static bool
convert_touch(const SDL_TouchFingerEvent *from, struct screen *screen,
struct control_msg *to) {
to->type = CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT;
if (!convert_touch_action(from->type, &to->inject_touch_event.action)) {
return false;
}
to->inject_touch_event.pointer_id = from->fingerId;
to->inject_touch_event.position.screen_size = screen->frame_size;
int ww;
int wh;
SDL_GL_GetDrawableSize(screen->window, &ww, &wh);
// SDL touch event coordinates are normalized in the range [0; 1]
int32_t x = from->x * ww;
int32_t y = from->y * wh;
to->inject_touch_event.position.point =
screen_convert_to_frame_coords(screen, x, y);
to->inject_touch_event.pressure = from->pressure;
to->inject_touch_event.buttons = 0;
return true;
}
void
input_manager_process_touch(struct input_manager *im,
const SDL_TouchFingerEvent *event) {
struct control_msg msg;
if (convert_touch(event, im->screen, &msg)) {
if (!controller_push_msg(im->controller, &msg)) {
LOGW("Could not request 'inject touch event'");
}
}
}
static bool
convert_mouse_button(const SDL_MouseButtonEvent *from, struct screen *screen,
struct control_msg *to) {
to->type = CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT;
if (!convert_mouse_action(from->type, &to->inject_touch_event.action)) {
return false;
}
to->inject_touch_event.pointer_id = POINTER_ID_MOUSE;
to->inject_touch_event.position.screen_size = screen->frame_size;
to->inject_touch_event.position.point =
screen_convert_to_frame_coords(screen, from->x, from->y);
to->inject_touch_event.pressure = 1.f;
to->inject_touch_event.buttons =
convert_mouse_buttons(SDL_BUTTON(from->button));
return true;
}
void
input_manager_process_mouse_button(struct input_manager *im,
const SDL_MouseButtonEvent *event,
bool control) {
if (event->which == SDL_TOUCH_MOUSEID) {
// simulated from touch events, so it's a duplicate
return;
}
if (event->type == SDL_MOUSEBUTTONDOWN) {
if (control && event->button == SDL_BUTTON_RIGHT) {
press_back_or_turn_screen_on(im->controller);
return;
}
if (control && event->button == SDL_BUTTON_MIDDLE) {
action_home(im->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) {
int32_t x = event->x;
int32_t y = event->y;
screen_hidpi_scale_coords(im->screen, &x, &y);
SDL_Rect *r = &im->screen->rect;
bool outside = x < r->x || x >= r->x + r->w
|| y < r->y || y >= r->y + r->h;
if (outside) {
screen_resize_to_fit(im->screen);
return;
}
}
// otherwise, send the click event to the device
}
if (!control) {
return;
}
struct control_msg msg;
if (convert_mouse_button(event, im->screen, &msg)) {
if (!controller_push_msg(im->controller, &msg)) {
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LOGW("Could not request 'inject mouse button event'");
}
}
}
static bool
convert_mouse_wheel(const SDL_MouseWheelEvent *from, struct screen *screen,
struct control_msg *to) {
// mouse_x and mouse_y are expressed in pixels relative to the window
int mouse_x;
int mouse_y;
SDL_GetMouseState(&mouse_x, &mouse_y);
struct position position = {
.screen_size = screen->frame_size,
.point = screen_convert_to_frame_coords(screen, mouse_x, mouse_y),
};
to->type = CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT;
to->inject_scroll_event.position = position;
to->inject_scroll_event.hscroll = from->x;
to->inject_scroll_event.vscroll = from->y;
return true;
}
void
input_manager_process_mouse_wheel(struct input_manager *im,
const SDL_MouseWheelEvent *event) {
struct control_msg msg;
if (convert_mouse_wheel(event, im->screen, &msg)) {
if (!controller_push_msg(im->controller, &msg)) {
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LOGW("Could not request 'inject mouse wheel event'");
}
}
}