scrcpy/app/src/input_manager.c

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#include "input_manager.h"
#include <assert.h>
#include <SDL2/SDL_keycode.h>
#include "event_converter.h"
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#include "util/log.h"
static const int ACTION_DOWN = 1;
static const int ACTION_UP = 1 << 1;
#define SC_SDL_SHORTCUT_MODS_MASK (KMOD_CTRL | KMOD_ALT | KMOD_GUI)
static inline uint16_t
to_sdl_mod(unsigned mod) {
uint16_t sdl_mod = 0;
if (mod & SC_MOD_LCTRL) {
sdl_mod |= KMOD_LCTRL;
}
if (mod & SC_MOD_RCTRL) {
sdl_mod |= KMOD_RCTRL;
}
if (mod & SC_MOD_LALT) {
sdl_mod |= KMOD_LALT;
}
if (mod & SC_MOD_RALT) {
sdl_mod |= KMOD_RALT;
}
if (mod & SC_MOD_LSUPER) {
sdl_mod |= KMOD_LGUI;
}
if (mod & SC_MOD_RSUPER) {
sdl_mod |= KMOD_RGUI;
}
return sdl_mod;
}
static bool
is_shortcut_mod(struct 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
input_manager_init(struct input_manager *im,
const struct scrcpy_options *options)
{
im->control = options->control;
im->forward_key_repeat = options->forward_key_repeat;
im->prefer_text = options->prefer_text;
im->forward_all_clicks = options->forward_all_clicks;
im->legacy_paste = options->legacy_paste;
const struct sc_shortcut_mods *shortcut_mods = &options->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;
}
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;
msg.inject_keycode.repeat = 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");
}
static inline void
action_copy(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_COPY, actions, "COPY");
}
static inline void
action_cut(struct controller *controller, int actions) {
send_keycode(controller, AKEYCODE_CUT, actions, "CUT");
}
// 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
set_device_clipboard(struct controller *controller, bool paste) {
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;
}
char *text_dup = strdup(text);
SDL_free(text);
if (!text_dup) {
LOGW("Could not strdup input text");
return;
}
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_SET_CLIPBOARD;
msg.set_clipboard.text = text_dup;
msg.set_clipboard.paste = paste;
if (!controller_push_msg(controller, &msg)) {
free(text_dup);
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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;
}
char *text_dup = strdup(text);
SDL_free(text);
if (!text_dup) {
LOGW("Could not strdup input text");
return;
}
struct control_msg msg;
msg.type = CONTROL_MSG_TYPE_INJECT_TEXT;
msg.inject_text.text = text_dup;
if (!controller_push_msg(controller, &msg)) {
free(text_dup);
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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);
}
static void
input_manager_process_text_input(struct input_manager *im,
const SDL_TextInputEvent *event) {
if (is_shortcut_mod(im, SDL_GetModState())) {
// A shortcut must never generate text events
return;
}
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 = 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)) {
free(msg.inject_text.text);
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LOGW("Could not request 'inject text'");
}
}
static bool
simulate_virtual_finger(struct input_manager *im,
enum android_motionevent_action action,
struct point point) {
bool up = action == AMOTION_EVENT_ACTION_UP;
struct control_msg msg;
msg.type = 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 (!controller_push_msg(im->controller, &msg)) {
LOGW("Could not request 'inject virtual finger event'");
return false;
}
return true;
}
static struct point
inverse_point(struct point point, struct size size) {
point.x = size.width - point.x;
point.y = size.height - point.y;
return point;
}
static bool
convert_input_key(const SDL_KeyboardEvent *from, struct control_msg *to,
bool prefer_text, uint32_t repeat) {
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.repeat = repeat;
to->inject_keycode.metastate = convert_meta_state(mod);
return true;
}
static void
input_manager_process_key(struct input_manager *im,
const SDL_KeyboardEvent *event) {
// control: indicates the state of the command-line option --no-control
bool control = im->control;
bool smod = is_shortcut_mod(im, event->keysym.mod);
struct controller *controller = im->controller;
SDL_Keycode keycode = event->keysym.sym;
bool down = event->type == SDL_KEYDOWN;
bool ctrl = event->keysym.mod & KMOD_CTRL;
bool shift = event->keysym.mod & KMOD_SHIFT;
bool repeat = event->repeat;
// The shortcut modifier is pressed
if (smod) {
int action = down ? ACTION_DOWN : ACTION_UP;
switch (keycode) {
case SDLK_h:
if (control && !shift && !repeat) {
action_home(controller, action);
}
return;
case SDLK_b: // fall-through
case SDLK_BACKSPACE:
if (control && !shift && !repeat) {
action_back(controller, action);
}
return;
case SDLK_s:
if (control && !shift && !repeat) {
action_app_switch(controller, action);
}
return;
case SDLK_m:
if (control && !shift && !repeat) {
action_menu(controller, action);
}
return;
case SDLK_p:
if (control && !shift && !repeat) {
action_power(controller, action);
}
return;
case SDLK_o:
if (control && !repeat && down) {
enum screen_power_mode mode = shift
? SCREEN_POWER_MODE_NORMAL
: SCREEN_POWER_MODE_OFF;
set_screen_power_mode(controller, mode);
}
return;
case SDLK_DOWN:
if (control && !shift) {
// forward repeated events
action_volume_down(controller, action);
}
return;
case SDLK_UP:
if (control && !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 (control && !shift && !repeat) {
action_copy(controller, action);
}
return;
case SDLK_x:
if (control && !shift && !repeat) {
action_cut(controller, action);
}
return;
case SDLK_v:
if (control && !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
set_device_clipboard(controller, true);
}
}
return;
case SDLK_f:
if (!shift && !repeat && down) {
screen_switch_fullscreen(im->screen);
}
return;
case SDLK_w:
if (!shift && !repeat && down) {
screen_resize_to_fit(im->screen);
}
return;
case SDLK_g:
if (!shift && !repeat && down) {
screen_resize_to_pixel_perfect(im->screen);
}
return;
case SDLK_i:
if (!shift && !repeat && down) {
struct fps_counter *fps_counter =
im->video_buffer->fps_counter;
switch_fps_counter_state(fps_counter);
}
return;
case SDLK_n:
if (control && !repeat && down) {
if (shift) {
collapse_notification_panel(controller);
} else {
expand_notification_panel(controller);
}
}
return;
case SDLK_r:
if (control && !shift && !repeat && down) {
rotate_device(controller);
}
return;
}
return;
}
if (!control) {
return;
}
if (event->repeat) {
if (!im->forward_key_repeat) {
return;
}
++im->repeat;
} else {
im->repeat = 0;
}
if (ctrl && !shift && keycode == SDLK_v && down && !repeat) {
if (im->legacy_paste) {
// inject the text as input events
clipboard_paste(controller);
return;
}
// Synchronize the computer clipboard to the device clipboard before
// sending Ctrl+v, to allow seamless copy-paste.
set_device_clipboard(controller, false);
}
struct control_msg msg;
if (convert_input_key(event, &msg, im->prefer_text, im->repeat)) {
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_window_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;
}
static 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)) {
return;
}
if (!controller_push_msg(im->controller, &msg)) {
LOGW("Could not request 'inject mouse motion event'");
}
if (im->vfinger_down) {
struct point mouse = msg.inject_touch_event.position.point;
struct point vfinger = inverse_point(mouse, im->screen->frame_size);
simulate_virtual_finger(im, AMOTION_EVENT_ACTION_MOVE, vfinger);
}
}
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 dw;
int dh;
SDL_GL_GetDrawableSize(screen->window, &dw, &dh);
// SDL touch event coordinates are normalized in the range [0; 1]
int32_t x = from->x * dw;
int32_t y = from->y * dh;
to->inject_touch_event.position.point =
screen_convert_drawable_to_frame_coords(screen, x, y);
to->inject_touch_event.pressure = from->pressure;
to->inject_touch_event.buttons = 0;
return true;
}
static 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_window_to_frame_coords(screen, from->x, from->y);
to->inject_touch_event.pressure =
from->type == SDL_MOUSEBUTTONDOWN ? 1.f : 0.f;
to->inject_touch_event.buttons =
convert_mouse_buttons(SDL_BUTTON(from->button));
return true;
}
static void
input_manager_process_mouse_button(struct input_manager *im,
const SDL_MouseButtonEvent *event) {
bool control = im->control;
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 && down) {
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)) {
return;
}
if (!controller_push_msg(im->controller, &msg)) {
LOGW("Could not request 'inject mouse button event'");
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 ((down && !im->vfinger_down && CTRL_PRESSED)
|| (!down && im->vfinger_down)) {
struct point mouse = msg.inject_touch_event.position.point;
struct 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 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_window_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;
}
static 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'");
}
}
}
bool
input_manager_handle_event(struct input_manager *im, SDL_Event *event) {
switch (event->type) {
case SDL_TEXTINPUT:
if (!im->control) {
return true;
}
input_manager_process_text_input(im, &event->text);
return true;
case SDL_KEYDOWN:
case SDL_KEYUP:
// some key events do not interact with the device, so process the
// event even if control is disabled
input_manager_process_key(im, &event->key);
return true;
case SDL_MOUSEMOTION:
if (!im->control) {
break;
}
input_manager_process_mouse_motion(im, &event->motion);
return true;
case SDL_MOUSEWHEEL:
if (!im->control) {
break;
}
input_manager_process_mouse_wheel(im, &event->wheel);
return true;
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
// some mouse events do not interact with the device, so process
// the event even if control is disabled
input_manager_process_mouse_button(im, &event->button);
return true;
case SDL_FINGERMOTION:
case SDL_FINGERDOWN:
case SDL_FINGERUP:
input_manager_process_touch(im, &event->tfinger);
return true;
}
return false;
}