Map middle-click to HOME

Middle-click is useless in practice. Use it for HOME.

README.md

@@ -188,22 +188,22 @@ To run without installing:
 
 ## Shortcuts
 
- | Action                                 |   Shortcut    |
- | -------------------------------------  | -------------:|
- | switch fullscreen mode                 | `Ctrl`+`f`    |
- | resize window to 1:1 (pixel-perfect)   | `Ctrl`+`g`    |
- | resize window to remove black borders  | `Ctrl`+`x`    |
- | click on `HOME`                        | `Ctrl`+`h`    |
- | click on `BACK`                        | `Ctrl`+`b`    |
- | click on `APP_SWITCH`                  | `Ctrl`+`m`    |
- | click on `VOLUME_UP`                   | `Ctrl`+`+`    |
- | click on `VOLUME_DOWN`                 | `Ctrl`+`-`    |
- | click on `POWER`                       | `Ctrl`+`p`    |
- | turn screen on or press BACK¹          | _Right-click_ |
- | paste computer clipboard to device     | `Ctrl`+`v`    |
- | enable/disable FPS counter (on stdout) | `Ctrl`+`i`    |
-
-_¹ Press BACK if the screen is already on._
+ | Action                                 |   Shortcut                   |
+ | -------------------------------------- |:---------------------------- |
+ | switch fullscreen mode                 | `Ctrl`+`f`                   |
+ | resize window to 1:1 (pixel-perfect)   | `Ctrl`+`g`                   |
+ | resize window to remove black borders  | `Ctrl`+`x`                   |
+ | click on `HOME`                        | `Ctrl`+`h` \| _Middle-click_ |
+ | click on `BACK`                        | `Ctrl`+`b` \| _Right-click¹_ |
+ | click on `APP_SWITCH`                  | `Ctrl`+`m`                   |
+ | click on `VOLUME_UP`                   | `Ctrl`+`+`                   |
+ | click on `VOLUME_DOWN`                 | `Ctrl`+`-`                   |
+ | click on `POWER`                       | `Ctrl`+`p`                   |
+ | turn screen on                         | _Right-click¹_               |
+ | paste computer clipboard to device     | `Ctrl`+`v`                   |
+ | enable/disable FPS counter (on stdout) | `Ctrl`+`i`                   |
+
+_¹Right-click turns the screen on if it was off, presses BACK otherwise._
 
 
 ## Why _scrcpy_?

app/src/inputmanager.c

@@ -226,9 +226,15 @@ void input_manager_process_mouse_motion(struct input_manager *input_manager,
 
 void input_manager_process_mouse_button(struct input_manager *input_manager,
                                         const SDL_MouseButtonEvent *event) {
-    if (event->button == SDL_BUTTON_RIGHT && event->type == SDL_MOUSEBUTTONDOWN) {
-        press_back_or_turn_screen_on(input_manager->controller);
-        return;
+    if (event->type == SDL_MOUSEBUTTONDOWN) {
+        if (event->button == SDL_BUTTON_RIGHT) {
+            press_back_or_turn_screen_on(input_manager->controller);
+            return;
+        }
+        if (event->button == SDL_BUTTON_MIDDLE) {
+            action_home(input_manager->controller);
+            return;
+        }
     };
     struct control_event control_event;
     if (mouse_button_from_sdl_to_android(event, input_manager->screen->frame_size, &control_event)) {

app/src/main.c

@@ -61,10 +61,12 @@ static void usage(const char *arg0) {
         "\n"
         "    Ctrl+h\n"
         "    Home\n"
+        "    Middle-click\n"
         "        click on HOME\n"
         "\n"
         "    Ctrl+b\n"
         "    Ctrl+Backspace\n"
+        "    Right-click (when screen is on)\n"
         "        click on BACK\n"
         "\n"
         "    Ctrl+m\n"
@@ -79,7 +81,7 @@ static void usage(const char *arg0) {
         "    Ctrl+p\n"
         "        click on POWER (turn screen on/off)\n"
         "\n"
-        "    Right-click\n"
+        "    Right-click (when screen is off)\n"
         "        turn screen on\n"
         "\n"
         "    Ctrl+v\n"