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scrcpy/app/src/input_manager.c

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#include "input_manager.h"
#include <assert.h>
#include <SDL2/SDL_keycode.h>
#include "input_events.h"
#include "screen.h"
#include "util/log.h"
#define SC_SDL_SHORTCUT_MODS_MASK (KMOD_CTRL | KMOD_ALT | KMOD_GUI)
static inline uint16_t
to_sdl_mod(unsigned shortcut_mod) {
uint16_t sdl_mod = 0;
if (shortcut_mod & SC_SHORTCUT_MOD_LCTRL) {
sdl_mod |= KMOD_LCTRL;
}
if (shortcut_mod & SC_SHORTCUT_MOD_RCTRL) {
sdl_mod |= KMOD_RCTRL;
}
if (shortcut_mod & SC_SHORTCUT_MOD_LALT) {
sdl_mod |= KMOD_LALT;
}
if (shortcut_mod & SC_SHORTCUT_MOD_RALT) {
sdl_mod |= KMOD_RALT;
}
if (shortcut_mod & SC_SHORTCUT_MOD_LSUPER) {
sdl_mod |= KMOD_LGUI;
}
if (shortcut_mod & SC_SHORTCUT_MOD_RSUPER) {
sdl_mod |= KMOD_RGUI;
}
return sdl_mod;
}
static bool
is_shortcut_mod(struct sc_input_manager *im, uint16_t sdl_mod) {
// keep only the relevant modifier keys
sdl_mod &= SC_SDL_SHORTCUT_MODS_MASK;
assert(im->sdl_shortcut_mods.count);
assert(im->sdl_shortcut_mods.count < SC_MAX_SHORTCUT_MODS);
for (unsigned i = 0; i < im->sdl_shortcut_mods.count; ++i) {
if (im->sdl_shortcut_mods.data[i] == sdl_mod) {
return true;
}
}
return false;
}
void
sc_input_manager_init(struct sc_input_manager *im,
const struct sc_input_manager_params *params) {
assert(!params->controller || (params->kp && params->kp->ops));
assert(!params->controller || (params->mp && params->mp->ops));
im->controller = params->controller;
im->fp = params->fp;
im->screen = params->screen;
im->kp = params->kp;
im->mp = params->mp;
im->forward_all_clicks = params->forward_all_clicks;
im->legacy_paste = params->legacy_paste;
im->clipboard_autosync = params->clipboard_autosync;
const struct sc_shortcut_mods *shortcut_mods = params->shortcut_mods;
assert(shortcut_mods->count);
assert(shortcut_mods->count < SC_MAX_SHORTCUT_MODS);
for (unsigned i = 0; i < shortcut_mods->count; ++i) {
uint16_t sdl_mod = to_sdl_mod(shortcut_mods->data[i]);
assert(sdl_mod);
im->sdl_shortcut_mods.data[i] = sdl_mod;
}
im->sdl_shortcut_mods.count = shortcut_mods->count;
im->vfinger_down = false;
im->last_keycode = SDLK_UNKNOWN;
im->last_mod = 0;
im->key_repeat = 0;
im->next_sequence = 1; // 0 is reserved for SC_SEQUENCE_INVALID
}
static void
send_keycode(struct sc_controller *controller, enum android_keycode keycode,
enum sc_action action, const char *name) {
// send DOWN event
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_INJECT_KEYCODE;
msg.inject_keycode.action = action == SC_ACTION_DOWN
? AKEY_EVENT_ACTION_DOWN
: AKEY_EVENT_ACTION_UP;
msg.inject_keycode.keycode = keycode;
msg.inject_keycode.metastate = 0;
msg.inject_keycode.repeat = 0;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'inject %s'", name);
}
}
static inline void
action_home(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_HOME, action, "HOME");
}
static inline void
action_back(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_BACK, action, "BACK");
}
static inline void
action_app_switch(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_APP_SWITCH, action, "APP_SWITCH");
}
static inline void
action_power(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_POWER, action, "POWER");
}
static inline void
action_volume_up(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_VOLUME_UP, action, "VOLUME_UP");
}
static inline void
action_volume_down(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_VOLUME_DOWN, action, "VOLUME_DOWN");
}
static inline void
action_menu(struct sc_controller *controller, enum sc_action action) {
send_keycode(controller, AKEYCODE_MENU, action, "MENU");
}
// turn the screen on if it was off, press BACK otherwise
// If the screen is off, it is turned on only on ACTION_DOWN
static void
press_back_or_turn_screen_on(struct sc_controller *controller,
enum sc_action action) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON;
msg.back_or_screen_on.action = action == SC_ACTION_DOWN
? AKEY_EVENT_ACTION_DOWN
: AKEY_EVENT_ACTION_UP;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'press back or turn screen on'");
}
}
static void
expand_notification_panel(struct sc_controller *controller) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'expand notification panel'");
}
}
static void
expand_settings_panel(struct sc_controller *controller) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'expand settings panel'");
}
}
static void
collapse_panels(struct sc_controller *controller) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_COLLAPSE_PANELS;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'collapse notification panel'");
}
}
static bool
get_device_clipboard(struct sc_controller *controller,
enum sc_copy_key copy_key) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_GET_CLIPBOARD;
msg.get_clipboard.copy_key = copy_key;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'get device clipboard'");
return false;
}
return true;
}
static bool
set_device_clipboard(struct sc_controller *controller, bool paste,
uint64_t sequence) {
char *text = SDL_GetClipboardText();
if (!text) {
LOGW("Could not get clipboard text: %s", SDL_GetError());
return false;
}
char *text_dup = strdup(text);
SDL_free(text);
if (!text_dup) {
LOGW("Could not strdup input text");
return false;
}
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_SET_CLIPBOARD;
msg.set_clipboard.sequence = sequence;
msg.set_clipboard.text = text_dup;
msg.set_clipboard.paste = paste;
if (!sc_controller_push_msg(controller, &msg)) {
free(text_dup);
LOGW("Could not request 'set device clipboard'");
return false;
}
return true;
}
static void
set_screen_power_mode(struct sc_controller *controller,
enum sc_screen_power_mode mode) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE;
msg.set_screen_power_mode.mode = mode;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request 'set screen power mode'");
}
}
static void
switch_fps_counter_state(struct sc_fps_counter *fps_counter) {
// the started state can only be written from the current thread, so there
// is no ToCToU issue
if (sc_fps_counter_is_started(fps_counter)) {
sc_fps_counter_stop(fps_counter);
} else {
sc_fps_counter_start(fps_counter);
// Any error is already logged
}
}
static void
clipboard_paste(struct sc_controller *controller) {
char *text = SDL_GetClipboardText();
if (!text) {
LOGW("Could not get clipboard text: %s", SDL_GetError());
return;
}
if (!*text) {
// empty text
SDL_free(text);
return;
}
char *text_dup = strdup(text);
SDL_free(text);
if (!text_dup) {
LOGW("Could not strdup input text");
return;
}
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_INJECT_TEXT;
msg.inject_text.text = text_dup;
if (!sc_controller_push_msg(controller, &msg)) {
free(text_dup);
LOGW("Could not request 'paste clipboard'");
}
}
static void
rotate_device(struct sc_controller *controller) {
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_ROTATE_DEVICE;
if (!sc_controller_push_msg(controller, &msg)) {
LOGW("Could not request device rotation");
}
}
static void
rotate_client_left(struct sc_screen *screen) {
unsigned new_rotation = (screen->rotation + 1) % 4;
sc_screen_set_rotation(screen, new_rotation);
}
static void
rotate_client_right(struct sc_screen *screen) {
unsigned new_rotation = (screen->rotation + 3) % 4;
sc_screen_set_rotation(screen, new_rotation);
}
static void
sc_input_manager_process_text_input(struct sc_input_manager *im,
const SDL_TextInputEvent *event) {
if (!im->kp->ops->process_text) {
// The key processor does not support text input
return;
}
if (is_shortcut_mod(im, SDL_GetModState())) {
// A shortcut must never generate text events
return;
}
struct sc_text_event evt = {
.text = event->text,
};
im->kp->ops->process_text(im->kp, &evt);
}
static bool
simulate_virtual_finger(struct sc_input_manager *im,
enum android_motionevent_action action,
struct sc_point point) {
bool up = action == AMOTION_EVENT_ACTION_UP;
struct sc_control_msg msg;
msg.type = SC_CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT;
msg.inject_touch_event.action = action;
msg.inject_touch_event.position.screen_size = im->screen->frame_size;
msg.inject_touch_event.position.point = point;
msg.inject_touch_event.pointer_id = POINTER_ID_VIRTUAL_FINGER;
msg.inject_touch_event.pressure = up ? 0.0f : 1.0f;
msg.inject_touch_event.buttons = 0;
if (!sc_controller_push_msg(im->controller, &msg)) {
LOGW("Could not request 'inject virtual finger event'");
return false;
}
return true;
}
static struct sc_point
inverse_point(struct sc_point point, struct sc_size size) {
point.x = size.width - point.x;
point.y = size.height - point.y;
return point;
}
static void
sc_input_manager_process_key(struct sc_input_manager *im,
const SDL_KeyboardEvent *event) {
// controller is NULL if --no-control is requested
struct sc_controller *controller = im->controller;
SDL_Keycode keycode = event->keysym.sym;
uint16_t mod = event->keysym.mod;
bool down = event->type == SDL_KEYDOWN;
bool ctrl = event->keysym.mod & KMOD_CTRL;
bool shift = event->keysym.mod & KMOD_SHIFT;
bool repeat = event->repeat;
bool smod = is_shortcut_mod(im, mod);
if (down && !repeat) {
if (keycode == im->last_keycode && mod == im->last_mod) {
++im->key_repeat;
} else {
im->key_repeat = 0;
im->last_keycode = keycode;
im->last_mod = mod;
}
}
// The shortcut modifier is pressed
if (smod) {
enum sc_action action = down ? SC_ACTION_DOWN : SC_ACTION_UP;
switch (keycode) {
case SDLK_h:
if (controller && !shift && !repeat) {
action_home(controller, action);
}
return;
case SDLK_b: // fall-through
case SDLK_BACKSPACE:
if (controller && !shift && !repeat) {
action_back(controller, action);
}
return;
case SDLK_s:
if (controller && !shift && !repeat) {
action_app_switch(controller, action);
}
return;
case SDLK_m:
if (controller && !shift && !repeat) {
action_menu(controller, action);
}
return;
case SDLK_p:
if (controller && !shift && !repeat) {
action_power(controller, action);
}
return;
case SDLK_o:
if (controller && !repeat && down) {
enum sc_screen_power_mode mode = shift
? SC_SCREEN_POWER_MODE_NORMAL
: SC_SCREEN_POWER_MODE_OFF;
set_screen_power_mode(controller, mode);
}
return;
case SDLK_DOWN:
if (controller && !shift) {
// forward repeated events
action_volume_down(controller, action);
}
return;
case SDLK_UP:
if (controller && !shift) {
// forward repeated events
action_volume_up(controller, action);
}
return;
case SDLK_LEFT:
if (!shift && !repeat && down) {
rotate_client_left(im->screen);
}
return;
case SDLK_RIGHT:
if (!shift && !repeat && down) {
rotate_client_right(im->screen);
}
return;
case SDLK_c:
if (controller && !shift && !repeat && down) {
get_device_clipboard(controller, SC_COPY_KEY_COPY);
}
return;
case SDLK_x:
if (controller && !shift && !repeat && down) {
get_device_clipboard(controller, SC_COPY_KEY_CUT);
}
return;
case SDLK_v:
if (controller && !repeat && down) {
if (shift || im->legacy_paste) {
// inject the text as input events
clipboard_paste(controller);
} else {
// store the text in the device clipboard and paste,
// without requesting an acknowledgment
set_device_clipboard(controller, true,
SC_SEQUENCE_INVALID);
}
}
return;
case SDLK_f:
if (!shift && !repeat && down) {
sc_screen_switch_fullscreen(im->screen);
}
return;
case SDLK_w:
if (!shift && !repeat && down) {
sc_screen_resize_to_fit(im->screen);
}
return;
case SDLK_g:
if (!shift && !repeat && down) {
sc_screen_resize_to_pixel_perfect(im->screen);
}
return;
case SDLK_i:
if (!shift && !repeat && down) {
switch_fps_counter_state(&im->screen->fps_counter);
}
return;
case SDLK_n:
if (controller && !repeat && down) {
if (shift) {
collapse_panels(controller);
} else if (im->key_repeat == 0) {
expand_notification_panel(controller);
} else {
expand_settings_panel(controller);
}
}
return;
case SDLK_r:
if (controller && !shift && !repeat && down) {
rotate_device(controller);
}
return;
}
return;
}
if (!controller) {
return;
}
uint64_t ack_to_wait = SC_SEQUENCE_INVALID;
bool is_ctrl_v = ctrl && !shift && keycode == SDLK_v && down && !repeat;
if (im->clipboard_autosync && is_ctrl_v) {
if (im->legacy_paste) {
// inject the text as input events
clipboard_paste(controller);
return;
}
// Request an acknowledgement only if necessary
uint64_t sequence = im->kp->async_paste ? im->next_sequence
: SC_SEQUENCE_INVALID;
// Synchronize the computer clipboard to the device clipboard before
// sending Ctrl+v, to allow seamless copy-paste.
bool ok = set_device_clipboard(controller, false, sequence);
if (!ok) {
LOGW("Clipboard could not be synchronized, Ctrl+v not injected");
return;
}
if (im->kp->async_paste) {
// The key processor must wait for this ack before injecting Ctrl+v
ack_to_wait = sequence;
// Increment only when the request succeeded
++im->next_sequence;
}
}
struct sc_key_event evt = {
.action = sc_action_from_sdl_keyboard_type(event->type),
.keycode = sc_keycode_from_sdl(event->keysym.sym),
.scancode = sc_scancode_from_sdl(event->keysym.scancode),
.repeat = event->repeat,
.mods_state = sc_mods_state_from_sdl(event->keysym.mod),
};
assert(im->kp->ops->process_key);
im->kp->ops->process_key(im->kp, &evt, ack_to_wait);
}
static void
sc_input_manager_process_mouse_motion(struct sc_input_manager *im,
const SDL_MouseMotionEvent *event) {
if (event->which == SDL_TOUCH_MOUSEID) {
// simulated from touch events, so it's a duplicate
return;
}
struct sc_mouse_motion_event evt = {
.position = {
.screen_size = im->screen->frame_size,
.point = sc_screen_convert_window_to_frame_coords(im->screen,
event->x,
event->y),
},
.xrel = event->xrel,
.yrel = event->yrel,
.buttons_state =
sc_mouse_buttons_state_from_sdl(event->state,
im->forward_all_clicks),
};
assert(im->mp->ops->process_mouse_motion);
im->mp->ops->process_mouse_motion(im->mp, &evt);
// vfinger must never be used in relative mode
assert(!im->mp->relative_mode || !im->vfinger_down);
if (im->vfinger_down) {
assert(!im->mp->relative_mode); // assert one more time
struct sc_point mouse =
sc_screen_convert_window_to_frame_coords(im->screen, event->x,
event->y);
struct sc_point vfinger = inverse_point(mouse, im->screen->frame_size);
simulate_virtual_finger(im, AMOTION_EVENT_ACTION_MOVE, vfinger);
}
}
static void
sc_input_manager_process_touch(struct sc_input_manager *im,
const SDL_TouchFingerEvent *event) {
if (!im->mp->ops->process_touch) {
// The mouse processor does not support touch events
return;
}
int dw;
int dh;
SDL_GL_GetDrawableSize(im->screen->window, &dw, &dh);
// SDL touch event coordinates are normalized in the range [0; 1]
int32_t x = event->x * dw;
int32_t y = event->y * dh;
struct sc_touch_event evt = {
.position = {
.screen_size = im->screen->frame_size,
.point =
sc_screen_convert_drawable_to_frame_coords(im->screen, x, y),
},
.action = sc_touch_action_from_sdl(event->type),
.pointer_id = event->fingerId,
.pressure = event->pressure,
};
im->mp->ops->process_touch(im->mp, &evt);
}
static void
sc_input_manager_process_mouse_button(struct sc_input_manager *im,
const SDL_MouseButtonEvent *event) {
struct sc_controller *controller = im->controller;
if (event->which == SDL_TOUCH_MOUSEID) {
// simulated from touch events, so it's a duplicate
return;
}
bool down = event->type == SDL_MOUSEBUTTONDOWN;
if (!im->forward_all_clicks) {
if (controller) {
enum sc_action action = down ? SC_ACTION_DOWN : SC_ACTION_UP;
if (event->button == SDL_BUTTON_X1) {
action_app_switch(controller, action);
return;
}
if (event->button == SDL_BUTTON_X2 && down) {
if (event->clicks < 2) {
expand_notification_panel(controller);
} else {
expand_settings_panel(controller);
}
return;
}
if (event->button == SDL_BUTTON_RIGHT) {
press_back_or_turn_screen_on(controller, action);
return;
}
if (event->button == SDL_BUTTON_MIDDLE) {
action_home(controller, action);
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;
sc_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) {
if (down) {
sc_screen_resize_to_fit(im->screen);
}
return;
}
}
// otherwise, send the click event to the device
}
if (!controller) {
return;
}
uint32_t sdl_buttons_state = SDL_GetMouseState(NULL, NULL);
struct sc_mouse_click_event evt = {
.position = {
.screen_size = im->screen->frame_size,
.point = sc_screen_convert_window_to_frame_coords(im->screen,
event->x,
event->y),
},
.action = sc_action_from_sdl_mousebutton_type(event->type),
.button = sc_mouse_button_from_sdl(event->button),
.buttons_state =
sc_mouse_buttons_state_from_sdl(sdl_buttons_state,
im->forward_all_clicks),
};
assert(im->mp->ops->process_mouse_click);
im->mp->ops->process_mouse_click(im->mp, &evt);
if (im->mp->relative_mode) {
assert(!im->vfinger_down); // vfinger must not be used in relative mode
// No pinch-to-zoom simulation
return;
}
// Pinch-to-zoom simulation.
//
// If Ctrl is hold when the left-click button is pressed, then
// pinch-to-zoom mode is enabled: on every mouse event until the left-click
// button is released, an additional "virtual finger" event is generated,
// having a position inverted through the center of the screen.
//
// In other words, the center of the rotation/scaling is the center of the
// screen.
#define CTRL_PRESSED (SDL_GetModState() & (KMOD_LCTRL | KMOD_RCTRL))
if (event->button == SDL_BUTTON_LEFT &&
((down && !im->vfinger_down && CTRL_PRESSED) ||
(!down && im->vfinger_down))) {
struct sc_point mouse =
sc_screen_convert_window_to_frame_coords(im->screen, event->x,
event->y);
struct sc_point vfinger = inverse_point(mouse, im->screen->frame_size);
enum android_motionevent_action action = down
? AMOTION_EVENT_ACTION_DOWN
: AMOTION_EVENT_ACTION_UP;
if (!simulate_virtual_finger(im, action, vfinger)) {
return;
}
im->vfinger_down = down;
}
}
static void
sc_input_manager_process_mouse_wheel(struct sc_input_manager *im,
const SDL_MouseWheelEvent *event) {
if (!im->mp->ops->process_mouse_scroll) {
// The mouse processor does not support scroll events
return;
}
// mouse_x and mouse_y are expressed in pixels relative to the window
int mouse_x;
int mouse_y;
uint32_t buttons = SDL_GetMouseState(&mouse_x, &mouse_y);
struct sc_mouse_scroll_event evt = {
.position = {
.screen_size = im->screen->frame_size,
.point = sc_screen_convert_window_to_frame_coords(im->screen,
mouse_x, mouse_y),
},
.hscroll = event->x,
.vscroll = event->y,
.buttons_state =
sc_mouse_buttons_state_from_sdl(buttons, im->forward_all_clicks),
};
im->mp->ops->process_mouse_scroll(im->mp, &evt);
}
static bool
is_apk(const char *file) {
const char *ext = strrchr(file, '.');
return ext && !strcmp(ext, ".apk");
}
static void
sc_input_manager_process_file(struct sc_input_manager *im,
const SDL_DropEvent *event) {
char *file = strdup(event->file);
SDL_free(event->file);
if (!file) {
LOG_OOM();
return;
}
enum sc_file_pusher_action action;
if (is_apk(file)) {
action = SC_FILE_PUSHER_ACTION_INSTALL_APK;
} else {
action = SC_FILE_PUSHER_ACTION_PUSH_FILE;
}
bool ok = sc_file_pusher_request(im->fp, action, file);
if (!ok) {
free(file);
}
}
void
sc_input_manager_handle_event(struct sc_input_manager *im, SDL_Event *event) {
bool control = im->controller;
switch (event->type) {
case SDL_TEXTINPUT:
if (!control) {
break;
}
sc_input_manager_process_text_input(im, &event->text);
break;
case SDL_KEYDOWN:
case SDL_KEYUP:
// some key events do not interact with the device, so process the
// event even if control is disabled
sc_input_manager_process_key(im, &event->key);
break;
case SDL_MOUSEMOTION:
if (!control) {
break;
}
sc_input_manager_process_mouse_motion(im, &event->motion);
break;
case SDL_MOUSEWHEEL:
if (!control) {
break;
}
sc_input_manager_process_mouse_wheel(im, &event->wheel);
break;
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
// some mouse events do not interact with the device, so process
// the event even if control is disabled
sc_input_manager_process_mouse_button(im, &event->button);
break;
case SDL_FINGERMOTION:
case SDL_FINGERDOWN:
case SDL_FINGERUP:
if (!control) {
break;
}
sc_input_manager_process_touch(im, &event->tfinger);
break;
case SDL_DROPFILE: {
if (!control) {
break;
}
sc_input_manager_process_file(im, &event->drop);
}
}
}
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