Forward mouse hover events

Also add an option --no-mouse-hover to get the old behavior.

Fixes #2743 <https://github.com/Genymobile/scrcpy/issues/2743>
Fixes #3070 <https://github.com/Genymobile/scrcpy/issues/3070>
PR #5039 <https://github.com/Genymobile/scrcpy/pull/5039>

app/data/bash-completion/scrcpy

@@ -25,7 +25,6 @@ _scrcpy() {
         -e --select-tcpip
         -f --fullscreen
         --force-adb-forward
-        --forward-all-clicks
         -h --help
         -K
         --keyboard=
@@ -41,6 +40,7 @@ _scrcpy() {
         -M
         --max-fps=
         --mouse=
+        --mouse-bind=
         -n --no-control
         -N --no-playback
         --no-audio
@@ -50,6 +50,7 @@ _scrcpy() {
         --no-downsize-on-error
         --no-key-repeat
         --no-mipmaps
+        --no-mouse-hover
         --no-power-on
         --no-video
         --no-video-playback

app/data/zsh-completion/_scrcpy

@@ -32,10 +32,9 @@ arguments=(
     {-e,--select-tcpip}'[Use TCP/IP device]'
     {-f,--fullscreen}'[Start in fullscreen]'
     '--force-adb-forward[Do not attempt to use \"adb reverse\" to connect to the device]'
-    '--forward-all-clicks[Forward clicks to device]'
     {-h,--help}'[Print the help]'
     '-K[Use UHID keyboard (same as --keyboard=uhid)]'
-    '--keyboard[Set the keyboard input mode]:mode:(disabled sdk uhid aoa)'
+    '--keyboard=[Set the keyboard input mode]:mode:(disabled sdk uhid aoa)'
     '--kill-adb-on-close[Kill adb when scrcpy terminates]'
     '--legacy-paste[Inject computer clipboard text as a sequence of key events on Ctrl+v]'
     '--list-camera-sizes[List the valid camera capture sizes]'
@@ -46,7 +45,8 @@ arguments=(
     {-m,--max-size=}'[Limit both the width and height of the video to value]'
     '-M[Use UHID mouse (same as --mouse=uhid)]'
     '--max-fps=[Limit the frame rate of screen capture]'
-    '--mouse[Set the mouse input mode]:mode:(disabled sdk uhid aoa)'
+    '--mouse=[Set the mouse input mode]:mode:(disabled sdk uhid aoa)'
+    '--mouse-bind=[Configure bindings of secondary clicks]'
     {-n,--no-control}'[Disable device control \(mirror the device in read only\)]'
     {-N,--no-playback}'[Disable video and audio playback]'
     '--no-audio[Disable audio forwarding]'
@@ -56,6 +56,7 @@ arguments=(
     '--no-downsize-on-error[Disable lowering definition on MediaCodec error]'
     '--no-key-repeat[Do not forward repeated key events when a key is held down]'
     '--no-mipmaps[Disable the generation of mipmaps]'
+    '--no-mouse-hover[Do not forward mouse hover events]'
     '--no-power-on[Do not power on the device on start]'
     '--no-video[Disable video forwarding]'
     '--no-video-playback[Disable video playback]'

app/scrcpy.1

@@ -163,10 +163,6 @@ Start in fullscreen.
 .B \-\-force\-adb\-forward
 Do not attempt to use "adb reverse" to connect to the device.
 
-.TP
-.B \-\-forward\-all\-clicks
-By default, right-click triggers BACK (or POWER on) and middle-click triggers HOME. This option disables these shortcuts and forward the clicks to the device instead.
-
 .TP
 .B \-h, \-\-help
 Print this help.
@@ -261,6 +257,23 @@ LAlt, LSuper or RSuper toggle the capture mode, to give control of the mouse bac
 
 Also see \fB\-\-keyboard\fR.
 
+.TP
+.BI "\-\-mouse\-bind " xxxx
+Configure bindings of secondary clicks.
+
+The argument must be exactly 4 characters, one for each secondary click (in order: right click, middle click, 4th click, 5th click).
+
+Each character must be one of the following:
+
+ - '+': forward the click to the device
+ - '-': ignore the click
+ - 'b': trigger shortcut BACK (or turn screen on if off)
+ - 'h': trigger shortcut HOME
+ - 's': trigger shortcut APP_SWITCH
+ - 'n': trigger shortcut "expand notification panel"
+
+Default is 'bhsn' for SDK mouse, and '++++' for AOA and UHID.
+
 
 .TP
 .B \-n, \-\-no\-control
@@ -304,6 +317,10 @@ Do not forward repeated key events when a key is held down.
 .B \-\-no\-mipmaps
 If the renderer is OpenGL 3.0+ or OpenGL ES 2.0+, then mipmaps are automatically generated to improve downscaling quality. This option disables the generation of mipmaps.
 
+.TP
+.B \-\-no\-mouse\-hover
+Do not forward mouse hover (mouse motion without any clicks) events.
+
 .TP
 .B \-\-no\-power\-on
 Do not power on the device on start.

app/src/cli.c

@@ -98,6 +98,8 @@ enum {
     OPT_HID_KEYBOARD_DEPRECATED,
     OPT_HID_MOUSE_DEPRECATED,
     OPT_NO_WINDOW,
+    OPT_MOUSE_BIND,
+    OPT_NO_MOUSE_HOVER,
 };
 
 struct sc_option {
@@ -352,11 +354,9 @@ static const struct sc_option options[] = {
                 "device.",
     },
     {
+        // deprecated
         .longopt_id = OPT_FORWARD_ALL_CLICKS,
         .longopt = "forward-all-clicks",
-        .text = "By default, right-click triggers BACK (or POWER on) and "
-                "middle-click triggers HOME. This option disables these "
-                "shortcuts and forwards the clicks to the device instead.",
     },
     {
         .shortopt = 'h',
@@ -490,6 +490,23 @@ static const struct sc_option options[] = {
                 "control of the mouse back to the computer.\n"
                 "Also see --keyboard.",
     },
+    {
+        .longopt_id = OPT_MOUSE_BIND,
+        .longopt = "mouse-bind",
+        .argdesc = "xxxx",
+        .text = "Configure bindings of secondary clicks.\n"
+                "The argument must be exactly 4 characters, one for each "
+                "secondary click (in order: right click, middle click, 4th "
+                "click, 5th click).\n"
+                "Each character must be one of the following:\n"
+                " '+': forward the click to the device\n"
+                " '-': ignore the click\n"
+                " 'b': trigger shortcut BACK (or turn screen on if off)\n"
+                " 'h': trigger shortcut HOME\n"
+                " 's': trigger shortcut APP_SWITCH\n"
+                " 'n': trigger shortcut \"expand notification panel\"\n"
+                "Default is 'bhsn' for SDK mouse, and '++++' for AOA and UHID.",
+    },
     {
         .shortopt = 'n',
         .longopt = "no-control",
@@ -552,6 +569,12 @@ static const struct sc_option options[] = {
                 "mipmaps are automatically generated to improve downscaling "
                 "quality. This option disables the generation of mipmaps.",
     },
+    {
+        .longopt_id = OPT_NO_MOUSE_HOVER,
+        .longopt = "no-mouse-hover",
+        .text = "Do not forward mouse hover (mouse motion without any clicks) "
+                "events.",
+    },
     {
         .longopt_id = OPT_NO_POWER_ON,
         .longopt = "no-power-on",
@@ -2038,11 +2061,63 @@ parse_pause_on_exit(const char *s, enum sc_pause_on_exit *pause_on_exit) {
     }
 
     LOGE("Unsupported pause on exit mode: %s "
-         "(expected true, false or if-error)", optarg);
+         "(expected true, false or if-error)", s);
     return false;
 
 }
 
+static bool
+parse_mouse_binding(char c, enum sc_mouse_binding *b) {
+    switch (c) {
+        case '+':
+            *b = SC_MOUSE_BINDING_CLICK;
+            return true;
+        case '-':
+            *b = SC_MOUSE_BINDING_DISABLED;
+            return true;
+        case 'b':
+            *b = SC_MOUSE_BINDING_BACK;
+            return true;
+        case 'h':
+            *b = SC_MOUSE_BINDING_HOME;
+            return true;
+        case 's':
+            *b = SC_MOUSE_BINDING_APP_SWITCH;
+            return true;
+        case 'n':
+            *b = SC_MOUSE_BINDING_EXPAND_NOTIFICATION_PANEL;
+            return true;
+        default:
+            LOGE("Invalid mouse binding: '%c' "
+                 "(expected '+', '-', 'b', 'h', 's' or 'n')", c);
+            return false;
+    }
+}
+
+static bool
+parse_mouse_bindings(const char *s, struct sc_mouse_bindings *mb) {
+    if (strlen(s) != 4) {
+        LOGE("Invalid mouse bindings: '%s' (expected exactly 4 characters from "
+             "{'+', '-', 'b', 'h', 's', 'n'})", s);
+        return false;
+    }
+
+    if (!parse_mouse_binding(s[0], &mb->right_click)) {
+        return false;
+    }
+    if (!parse_mouse_binding(s[1], &mb->middle_click)) {
+        return false;
+    }
+    if (!parse_mouse_binding(s[2], &mb->click4)) {
+        return false;
+    }
+    if (!parse_mouse_binding(s[3], &mb->click5)) {
+        return false;
+    }
+
+    return true;
+}
+
 static bool
 parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
                        const char *optstring, const struct option *longopts) {
@@ -2125,6 +2200,14 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
                     return false;
                 }
                 break;
+            case OPT_MOUSE_BIND:
+                if (!parse_mouse_bindings(optarg, &opts->mouse_bindings)) {
+                    return false;
+                }
+                break;
+            case OPT_NO_MOUSE_HOVER:
+                opts->mouse_hover = false;
+                break;
             case OPT_HID_MOUSE_DEPRECATED:
                 LOGE("--hid-mouse has been removed, use --mouse=aoa or "
                      "--mouse=uhid instead.");
@@ -2322,7 +2405,14 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
                 }
                 break;
             case OPT_FORWARD_ALL_CLICKS:
-                opts->forward_all_clicks = true;
+                LOGW("--forward-all-clicks is deprecated, "
+                     "use --mouse-bind=++++ instead.");
+                opts->mouse_bindings = (struct sc_mouse_bindings) {
+                    .right_click = SC_MOUSE_BINDING_CLICK,
+                    .middle_click = SC_MOUSE_BINDING_CLICK,
+                    .click4 = SC_MOUSE_BINDING_CLICK,
+                    .click5 = SC_MOUSE_BINDING_CLICK,
+                };
                 break;
             case OPT_LEGACY_PASTE:
                 opts->legacy_paste = true;
@@ -2610,6 +2700,30 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
         }
     }
 
+    // If mouse bindings are not explictly set, configure default bindings
+    if (opts->mouse_bindings.right_click == SC_MOUSE_BINDING_AUTO) {
+        assert(opts->mouse_bindings.middle_click == SC_MOUSE_BINDING_AUTO);
+        assert(opts->mouse_bindings.click4 == SC_MOUSE_BINDING_AUTO);
+        assert(opts->mouse_bindings.click5 == SC_MOUSE_BINDING_AUTO);
+
+        // By default, forward all clicks only for UHID and AOA
+        if (opts->mouse_input_mode == SC_MOUSE_INPUT_MODE_SDK) {
+            opts->mouse_bindings = (struct sc_mouse_bindings) {
+                .right_click = SC_MOUSE_BINDING_BACK,
+                .middle_click = SC_MOUSE_BINDING_HOME,
+                .click4 = SC_MOUSE_BINDING_APP_SWITCH,
+                .click5 = SC_MOUSE_BINDING_EXPAND_NOTIFICATION_PANEL,
+            };
+        } else {
+            opts->mouse_bindings = (struct sc_mouse_bindings) {
+                .right_click = SC_MOUSE_BINDING_CLICK,
+                .middle_click = SC_MOUSE_BINDING_CLICK,
+                .click4 = SC_MOUSE_BINDING_CLICK,
+                .click5 = SC_MOUSE_BINDING_CLICK,
+            };
+        }
+    }
+
     if (otg) {
         if (!opts->control) {
             LOGE("--no-control is not allowed in OTG mode");
@@ -2654,6 +2768,12 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
         }
     }
 
+    if (opts->mouse_input_mode != SC_MOUSE_INPUT_MODE_SDK
+            && !opts->mouse_hover) {
+        LOGE("--no-mouse-over is specific to --mouse=sdk");
+        return false;
+    }
+
     if ((opts->tunnel_host || opts->tunnel_port) && !opts->force_adb_forward) {
         LOGI("Tunnel host/port is set, "
              "--force-adb-forward automatically enabled.");

app/src/input_events.h

@@ -9,6 +9,7 @@
 #include <SDL2/SDL_events.h>
 
 #include "coords.h"
+#include "options.h"
 
 /* The representation of input events in scrcpy is very close to the SDL API,
  * for simplicity.
@@ -437,15 +438,21 @@ sc_mouse_button_from_sdl(uint8_t button) {
 
 static inline uint8_t
 sc_mouse_buttons_state_from_sdl(uint32_t buttons_state,
-                                bool forward_all_clicks) {
+                                const struct sc_mouse_bindings *mb) {
     assert(buttons_state < 0x100); // fits in uint8_t
 
     uint8_t mask = SC_MOUSE_BUTTON_LEFT;
-    if (forward_all_clicks) {
-        mask |= SC_MOUSE_BUTTON_RIGHT
-              | SC_MOUSE_BUTTON_MIDDLE
-              | SC_MOUSE_BUTTON_X1
-              | SC_MOUSE_BUTTON_X2;
+    if (!mb || mb->right_click == SC_MOUSE_BINDING_CLICK) {
+        mask |= SC_MOUSE_BUTTON_RIGHT;
+    }
+    if (!mb || mb->middle_click == SC_MOUSE_BINDING_CLICK) {
+        mask |= SC_MOUSE_BUTTON_MIDDLE;
+    }
+    if (!mb || mb->click4 == SC_MOUSE_BINDING_CLICK) {
+        mask |= SC_MOUSE_BUTTON_X1;
+    }
+    if (!mb || mb->click5 == SC_MOUSE_BINDING_CLICK) {
+        mask |= SC_MOUSE_BUTTON_X2;
     }
 
     return buttons_state & mask;

app/src/input_manager.c

@@ -52,6 +52,14 @@ is_shortcut_key(struct sc_input_manager *im, SDL_Keycode keycode) {
         || (im->sdl_shortcut_mods & KMOD_RGUI  && keycode == SDLK_RGUI);
 }
 
+static inline bool
+mouse_bindings_has_secondary_click(const struct sc_mouse_bindings *mb) {
+    return mb->right_click == SC_MOUSE_BINDING_CLICK
+        || mb->middle_click == SC_MOUSE_BINDING_CLICK
+        || mb->click4 == SC_MOUSE_BINDING_CLICK
+        || mb->click5 == SC_MOUSE_BINDING_CLICK;
+}
+
 void
 sc_input_manager_init(struct sc_input_manager *im,
                       const struct sc_input_manager_params *params) {
@@ -67,7 +75,9 @@ sc_input_manager_init(struct sc_input_manager *im,
     im->kp = params->kp;
     im->mp = params->mp;
 
-    im->forward_all_clicks = params->forward_all_clicks;
+    im->mouse_bindings = params->mouse_bindings;
+    im->has_secondary_click =
+        mouse_bindings_has_secondary_click(&im->mouse_bindings);
     im->legacy_paste = params->legacy_paste;
     im->clipboard_autosync = params->clipboard_autosync;
 
@@ -366,8 +376,8 @@ simulate_virtual_finger(struct sc_input_manager *im,
     msg.inject_touch_event.position.screen_size = im->screen->frame_size;
     msg.inject_touch_event.position.point = point;
     msg.inject_touch_event.pointer_id =
-        im->forward_all_clicks ? POINTER_ID_VIRTUAL_MOUSE
-                               : POINTER_ID_VIRTUAL_FINGER;
+        im->has_secondary_click ? POINTER_ID_VIRTUAL_MOUSE
+                                : POINTER_ID_VIRTUAL_FINGER;
     msg.inject_touch_event.pressure = up ? 0.0f : 1.0f;
     msg.inject_touch_event.action_button = 0;
     msg.inject_touch_event.buttons = 0;
@@ -652,13 +662,12 @@ sc_input_manager_process_mouse_motion(struct sc_input_manager *im,
 
     struct sc_mouse_motion_event evt = {
         .position = sc_input_manager_get_position(im, event->x, event->y),
-        .pointer_id = im->forward_all_clicks ? POINTER_ID_MOUSE
-                                             : POINTER_ID_GENERIC_FINGER,
+        .pointer_id = im->has_secondary_click ? POINTER_ID_MOUSE
+                                              : POINTER_ID_GENERIC_FINGER,
         .xrel = event->xrel,
         .yrel = event->yrel,
         .buttons_state =
-            sc_mouse_buttons_state_from_sdl(event->state,
-                                            im->forward_all_clicks),
+            sc_mouse_buttons_state_from_sdl(event->state, &im->mouse_bindings),
     };
 
     assert(im->mp->ops->process_mouse_motion);
@@ -709,6 +718,25 @@ sc_input_manager_process_touch(struct sc_input_manager *im,
     im->mp->ops->process_touch(im->mp, &evt);
 }
 
+static enum sc_mouse_binding
+sc_input_manager_get_binding(const struct sc_mouse_bindings *bindings,
+                             uint8_t sdl_button) {
+    switch (sdl_button) {
+        case SDL_BUTTON_LEFT:
+            return SC_MOUSE_BINDING_CLICK;
+        case SDL_BUTTON_RIGHT:
+            return bindings->right_click;
+        case SDL_BUTTON_MIDDLE:
+            return bindings->middle_click;
+        case SDL_BUTTON_X1:
+            return bindings->click4;
+        case SDL_BUTTON_X2:
+            return bindings->click5;
+        default:
+            return SC_MOUSE_BINDING_DISABLED;
+    }
+}
+
 static void
 sc_input_manager_process_mouse_button(struct sc_input_manager *im,
                                       const SDL_MouseButtonEvent *event) {
@@ -720,49 +748,63 @@ sc_input_manager_process_mouse_button(struct sc_input_manager *im,
     bool control = im->controller;
     bool paused = im->screen->paused;
     bool down = event->type == SDL_MOUSEBUTTONDOWN;
-    if (!im->forward_all_clicks) {
-        if (control && !paused) {
-            enum sc_action action = down ? SC_ACTION_DOWN : SC_ACTION_UP;
+    if (control && !paused) {
+        enum sc_action action = down ? SC_ACTION_DOWN : SC_ACTION_UP;
 
-            if (im->kp && event->button == SDL_BUTTON_X1) {
-                action_app_switch(im, action);
+        enum sc_mouse_binding binding =
+            sc_input_manager_get_binding(&im->mouse_bindings, event->button);
+        assert(binding != SC_MOUSE_BINDING_AUTO);
+        switch (binding) {
+            case SC_MOUSE_BINDING_DISABLED:
+                // ignore click
                 return;
-            }
-            if (event->button == SDL_BUTTON_X2 && down) {
-                if (event->clicks < 2) {
-                    expand_notification_panel(im);
-                } else {
-                    expand_settings_panel(im);
+            case SC_MOUSE_BINDING_BACK:
+                if (im->kp) {
+                    press_back_or_turn_screen_on(im, action);
                 }
                 return;
-            }
-            if (im->kp && event->button == SDL_BUTTON_RIGHT) {
-                press_back_or_turn_screen_on(im, action);
+            case SC_MOUSE_BINDING_HOME:
+                if (im->kp) {
+                    action_home(im, action);
+                }
                 return;
-            }
-            if (im->kp && event->button == SDL_BUTTON_MIDDLE) {
-                action_home(im, action);
+            case SC_MOUSE_BINDING_APP_SWITCH:
+                if (im->kp) {
+                    action_app_switch(im, action);
+                }
                 return;
-            }
-        }
-
-        // double-click on black borders resize to fit the device screen
-        bool video = im->screen->video;
-        if (video && 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) {
+            case SC_MOUSE_BINDING_EXPAND_NOTIFICATION_PANEL:
                 if (down) {
-                    sc_screen_resize_to_fit(im->screen);
+                    if (event->clicks < 2) {
+                        expand_notification_panel(im);
+                    } else {
+                        expand_settings_panel(im);
+                    }
                 }
                 return;
-            }
+            default:
+                assert(binding == SC_MOUSE_BINDING_CLICK);
+                break;
+        }
+    }
+
+    // double-click on black borders resizes to fit the device screen
+    bool video = im->screen->video;
+    bool mouse_relative_mode = im->mp && im->mp->relative_mode;
+    if (video && !mouse_relative_mode && 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 (!im->mp || paused) {
@@ -775,11 +817,10 @@ sc_input_manager_process_mouse_button(struct sc_input_manager *im,
         .position = sc_input_manager_get_position(im, event->x, event->y),
         .action = sc_action_from_sdl_mousebutton_type(event->type),
         .button = sc_mouse_button_from_sdl(event->button),
-        .pointer_id = im->forward_all_clicks ? POINTER_ID_MOUSE
-                                             : POINTER_ID_GENERIC_FINGER,
-        .buttons_state =
-            sc_mouse_buttons_state_from_sdl(sdl_buttons_state,
-                                            im->forward_all_clicks),
+        .pointer_id = im->has_secondary_click ? POINTER_ID_MOUSE
+                                              : POINTER_ID_GENERIC_FINGER,
+        .buttons_state = sc_mouse_buttons_state_from_sdl(sdl_buttons_state,
+                                                         &im->mouse_bindings),
     };
 
     assert(im->mp->ops->process_mouse_click);
@@ -855,8 +896,8 @@ sc_input_manager_process_mouse_wheel(struct sc_input_manager *im,
         .hscroll = CLAMP(event->x, -1, 1),
         .vscroll = CLAMP(event->y, -1, 1),
 #endif
-        .buttons_state =
-            sc_mouse_buttons_state_from_sdl(buttons, im->forward_all_clicks),
+        .buttons_state = sc_mouse_buttons_state_from_sdl(buttons,
+                                                         &im->mouse_bindings),
     };
 
     im->mp->ops->process_mouse_scroll(im->mp, &evt);

app/src/input_manager.h

@@ -22,7 +22,8 @@ struct sc_input_manager {
     struct sc_key_processor *kp;
     struct sc_mouse_processor *mp;
 
-    bool forward_all_clicks;
+    struct sc_mouse_bindings mouse_bindings;
+    bool has_secondary_click;
     bool legacy_paste;
     bool clipboard_autosync;
 
@@ -49,7 +50,7 @@ struct sc_input_manager_params {
     struct sc_key_processor *kp;
     struct sc_mouse_processor *mp;
 
-    bool forward_all_clicks;
+    struct sc_mouse_bindings mouse_bindings;
     bool legacy_paste;
     bool clipboard_autosync;
     uint8_t shortcut_mods; // OR of enum sc_shortcut_mod values

app/src/mouse_sdk.c

@@ -58,17 +58,18 @@ convert_touch_action(enum sc_touch_action action) {
 static void
 sc_mouse_processor_process_mouse_motion(struct sc_mouse_processor *mp,
                                     const struct sc_mouse_motion_event *event) {
-    if (!event->buttons_state) {
+    struct sc_mouse_sdk *m = DOWNCAST(mp);
+
+    if (!m->mouse_hover && !event->buttons_state) {
         // Do not send motion events when no click is pressed
         return;
     }
 
-    struct sc_mouse_sdk *m = DOWNCAST(mp);
-
     struct sc_control_msg msg = {
         .type = SC_CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT,
         .inject_touch_event = {
-            .action = AMOTION_EVENT_ACTION_MOVE,
+            .action = event->buttons_state ? AMOTION_EVENT_ACTION_MOVE
+                                           : AMOTION_EVENT_ACTION_HOVER_MOVE,
             .pointer_id = event->pointer_id,
             .position = event->position,
             .pressure = 1.f,
@@ -145,8 +146,10 @@ sc_mouse_processor_process_touch(struct sc_mouse_processor *mp,
 }
 
 void
-sc_mouse_sdk_init(struct sc_mouse_sdk *m, struct sc_controller *controller) {
+sc_mouse_sdk_init(struct sc_mouse_sdk *m, struct sc_controller *controller,
+                  bool mouse_hover) {
     m->controller = controller;
+    m->mouse_hover = mouse_hover;
 
     static const struct sc_mouse_processor_ops ops = {
         .process_mouse_motion = sc_mouse_processor_process_mouse_motion,

app/src/mouse_sdk.h

@@ -13,9 +13,11 @@ struct sc_mouse_sdk {
     struct sc_mouse_processor mouse_processor; // mouse processor trait
 
     struct sc_controller *controller;
+    bool mouse_hover;
 };
 
 void
-sc_mouse_sdk_init(struct sc_mouse_sdk *m, struct sc_controller *controller);
+sc_mouse_sdk_init(struct sc_mouse_sdk *m, struct sc_controller *controller,
+                  bool mouse_hover);
 
 #endif

app/src/options.c

@@ -23,6 +23,12 @@ const struct scrcpy_options scrcpy_options_default = {
     .record_format = SC_RECORD_FORMAT_AUTO,
     .keyboard_input_mode = SC_KEYBOARD_INPUT_MODE_AUTO,
     .mouse_input_mode = SC_MOUSE_INPUT_MODE_AUTO,
+    .mouse_bindings = {
+        .right_click = SC_MOUSE_BINDING_AUTO,
+        .middle_click = SC_MOUSE_BINDING_AUTO,
+        .click4 = SC_MOUSE_BINDING_AUTO,
+        .click5 = SC_MOUSE_BINDING_AUTO,
+    },
     .camera_facing = SC_CAMERA_FACING_ANY,
     .port_range = {
         .first = DEFAULT_LOCAL_PORT_RANGE_FIRST,
@@ -68,7 +74,6 @@ const struct scrcpy_options scrcpy_options_default = {
     .force_adb_forward = false,
     .disable_screensaver = false,
     .forward_key_repeat = true,
-    .forward_all_clicks = false,
     .legacy_paste = false,
     .power_off_on_close = false,
     .clipboard_autosync = true,
@@ -87,6 +92,7 @@ const struct scrcpy_options scrcpy_options_default = {
     .camera_high_speed = false,
     .list = 0,
     .window = true,
+    .mouse_hover = true,
 };
 
 enum sc_orientation

app/src/options.h

@@ -155,6 +155,23 @@ enum sc_mouse_input_mode {
     SC_MOUSE_INPUT_MODE_AOA,
 };
 
+enum sc_mouse_binding {
+    SC_MOUSE_BINDING_AUTO,
+    SC_MOUSE_BINDING_DISABLED,
+    SC_MOUSE_BINDING_CLICK,
+    SC_MOUSE_BINDING_BACK,
+    SC_MOUSE_BINDING_HOME,
+    SC_MOUSE_BINDING_APP_SWITCH,
+    SC_MOUSE_BINDING_EXPAND_NOTIFICATION_PANEL,
+};
+
+struct sc_mouse_bindings {
+    enum sc_mouse_binding right_click;
+    enum sc_mouse_binding middle_click;
+    enum sc_mouse_binding click4;
+    enum sc_mouse_binding click5;
+};
+
 enum sc_key_inject_mode {
     // Inject special keys, letters and space as key events.
     // Inject numbers and punctuation as text events.
@@ -208,6 +225,7 @@ struct scrcpy_options {
     enum sc_record_format record_format;
     enum sc_keyboard_input_mode keyboard_input_mode;
     enum sc_mouse_input_mode mouse_input_mode;
+    struct sc_mouse_bindings mouse_bindings;
     enum sc_camera_facing camera_facing;
     struct sc_port_range port_range;
     uint32_t tunnel_host;
@@ -250,7 +268,6 @@ struct scrcpy_options {
     bool force_adb_forward;
     bool disable_screensaver;
     bool forward_key_repeat;
-    bool forward_all_clicks;
     bool legacy_paste;
     bool power_off_on_close;
     bool clipboard_autosync;
@@ -273,6 +290,7 @@ struct scrcpy_options {
 #define SC_OPTION_LIST_CAMERA_SIZES 0x8
     uint8_t list;
     bool window;
+    bool mouse_hover;
 };
 
 extern const struct scrcpy_options scrcpy_options_default;

app/src/scrcpy.c

@@ -681,7 +681,8 @@ scrcpy(struct scrcpy_options *options) {
         }
 
         if (options->mouse_input_mode == SC_MOUSE_INPUT_MODE_SDK) {
-            sc_mouse_sdk_init(&s->mouse_sdk, &s->controller);
+            sc_mouse_sdk_init(&s->mouse_sdk, &s->controller,
+                              options->mouse_hover);
             mp = &s->mouse_sdk.mouse_processor;
         } else if (options->mouse_input_mode == SC_MOUSE_INPUT_MODE_UHID) {
             bool ok = sc_mouse_uhid_init(&s->mouse_uhid, &s->controller);
@@ -712,7 +713,7 @@ scrcpy(struct scrcpy_options *options) {
             .fp = fp,
             .kp = kp,
             .mp = mp,
-            .forward_all_clicks = options->forward_all_clicks,
+            .mouse_bindings = options->mouse_bindings,
             .legacy_paste = options->legacy_paste,
             .clipboard_autosync = options->clipboard_autosync,
             .shortcut_mods = options->shortcut_mods,

app/src/screen.c

@@ -481,7 +481,7 @@ sc_screen_init(struct sc_screen *screen,
         .screen = screen,
         .kp = params->kp,
         .mp = params->mp,
-        .forward_all_clicks = params->forward_all_clicks,
+        .mouse_bindings = params->mouse_bindings,
         .legacy_paste = params->legacy_paste,
         .clipboard_autosync = params->clipboard_autosync,
         .shortcut_mods = params->shortcut_mods,

app/src/screen.h

@@ -79,7 +79,7 @@ struct sc_screen_params {
     struct sc_key_processor *kp;
     struct sc_mouse_processor *mp;
 
-    bool forward_all_clicks;
+    struct sc_mouse_bindings mouse_bindings;
     bool legacy_paste;
     bool clipboard_autosync;
     uint8_t shortcut_mods; // OR of enum sc_shortcut_mod values

app/src/usb/screen_otg.c

@@ -169,7 +169,7 @@ sc_screen_otg_process_mouse_motion(struct sc_screen_otg *screen,
         // .position not used for HID events
         .xrel = event->xrel,
         .yrel = event->yrel,
-        .buttons_state = sc_mouse_buttons_state_from_sdl(event->state, true),
+        .buttons_state = sc_mouse_buttons_state_from_sdl(event->state, NULL),
     };
 
     assert(mp->ops->process_mouse_motion);
@@ -189,7 +189,7 @@ sc_screen_otg_process_mouse_button(struct sc_screen_otg *screen,
         .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, true),
+            sc_mouse_buttons_state_from_sdl(sdl_buttons_state, NULL),
     };
 
     assert(mp->ops->process_mouse_click);
@@ -209,7 +209,7 @@ sc_screen_otg_process_mouse_wheel(struct sc_screen_otg *screen,
         .hscroll = event->x,
         .vscroll = event->y,
         .buttons_state =
-            sc_mouse_buttons_state_from_sdl(sdl_buttons_state, true),
+            sc_mouse_buttons_state_from_sdl(sdl_buttons_state, NULL),
     };
 
     assert(mp->ops->process_mouse_scroll);

doc/control.md

@@ -106,15 +106,6 @@ only inverts _x_.
 This only works for the default mouse mode (`--mouse=sdk`).
 
 
-## Right-click and middle-click
-
-By default, right-click triggers BACK (or POWER on) and middle-click triggers
-HOME. To disable these shortcuts and forward the clicks to the device instead:
-
-```bash
-scrcpy --forward-all-clicks
-```
-
 ## File drop
 
 ### Install APK

doc/mouse.md

@@ -18,6 +18,14 @@ Note that on some devices, an additional option must be enabled in developer
 options for this mouse mode to work. See
 [prerequisites](/README.md#prerequisites).
 
+### Mouse hover
+
+By default, mouse hover (mouse motion without any clicks) events are forwarded
+to the device. This can be disabled with:
+
+```
+scrcpy --no-mouse-hover
+```
 
 ## Physical mouse simulation
 
@@ -68,3 +76,43 @@ debugging disabled (see [OTG](otg.md)).
 Note: On Windows, it may only work in [OTG mode](otg.md), not while mirroring
 (it is not possible to open a USB device if it is already open by another
 process like the _adb daemon_).
+
+
+## Mouse bindings
+
+By default, with SDK mouse, right-click triggers BACK (or POWER on) and
+middle-click triggers HOME. In addition, the 4th click triggers APP_SWITCH and
+the 5th click expands the notification panel.
+
+In AOA and UHID mouse modes, all clicks are forwarded by default.
+
+The shortcuts can be configured using `--mouse-bind=xxxx` for any mouse mode.
+The argument must be exactly 4 characters, one for each secondary click:
+
+```
+--mouse-bind=xxxx
+             ^^^^
+             ||||
+             ||| `- 5th click
+             || `-- 4th click
+             | `--- middle click
+              `---- right click
+```
+
+Each character must be one of the following:
+
+ - `+`: forward the click to the device
+ - `-`: ignore the click
+ - `b`: trigger shortcut BACK (or turn screen on if off)
+ - `h`: trigger shortcut HOME
+ - `s`: trigger shortcut APP_SWITCH
+ - `n`: trigger shortcut "expand notification panel"
+
+For example:
+
+```bash
+scrcpy --mouse-bind=bhsn  # the default mode with SDK mouse
+scrcpy --mouse-bind=++++  # forward all clicks (default for AOA/UHID)
+scrcpy --mouse-bind=++bh  # forward right and middle clicks,
+                          # use 4th and 5th for BACK and HOME
+```