Move input_manager into screen

The input_manager is strongly tied to the screen, it could not work
independently of the specific screen implementation.

To implement a user-friendly HID mouse behavior, some SDL events
will need to be handled both by the screen and by the input manager. For
example, a click must typically be handled by the input_manager so that
it is forwarded to the device, but in HID mouse mode, the first click
should be handled by the screen to capture the mouse (enable relative
mouse mode).

Make the input_manager a descendant of the screen, so that the screen
decides what to do on SDL events.

Concretely, replace this structure hierarchy:

     +- struct scrcpy
        +- struct input_manager
        +- struct screen

by this one:

     +- struct scrcpy
        +- struct screen
           +- struct input_manager

app/src/input_manager.c

@@ -4,6 +4,7 @@
 #include <SDL2/SDL_keycode.h>
 
 #include "input_events.h"
+#include "screen.h"
 #include "util/log.h"
 
 static inline uint16_t

app/src/input_manager.h

@@ -10,7 +10,6 @@
 #include "controller.h"
 #include "fps_counter.h"
 #include "options.h"
-#include "screen.h"
 #include "trait/key_processor.h"
 #include "trait/mouse_processor.h"
 

app/src/scrcpy.c

@@ -17,7 +17,6 @@
 #include "decoder.h"
 #include "events.h"
 #include "file_handler.h"
-#include "input_manager.h"
 #ifdef HAVE_AOA_HID
 # include "hid_keyboard.h"
 #endif
@@ -57,7 +56,6 @@ struct scrcpy {
 #endif
     };
     struct sc_mouse_inject mouse_inject;
-    struct input_manager input_manager;
 };
 
 static inline void
@@ -189,11 +187,6 @@ handle_event(struct scrcpy *s, const struct scrcpy_options *options,
     }
 
     bool consumed = screen_handle_event(&s->screen, event);
-    if (consumed) {
-        goto end;
-    }
-
-    consumed = input_manager_handle_event(&s->input_manager, event);
     (void) consumed;
 
 end:
@@ -450,6 +443,9 @@ scrcpy(struct scrcpy_options *options) {
         stream_add_sink(&s->stream, &rec->packet_sink);
     }
 
+    struct sc_key_processor *kp = NULL;
+    struct sc_mouse_processor *mp = NULL;
+
     if (options->control) {
 #ifdef HAVE_AOA_HID
         if (options->keyboard_input_mode == SC_KEYBOARD_INPUT_MODE_HID) {
@@ -481,59 +477,7 @@ scrcpy(struct scrcpy_options *options) {
                 LOGW("Could not request 'set screen power mode'");
             }
         }
-    }
 
-    if (options->display) {
-        const char *window_title =
-            options->window_title ? options->window_title : info->device_name;
-
-        struct screen_params screen_params = {
-            .window_title = window_title,
-            .frame_size = info->frame_size,
-            .always_on_top = options->always_on_top,
-            .window_x = options->window_x,
-            .window_y = options->window_y,
-            .window_width = options->window_width,
-            .window_height = options->window_height,
-            .window_borderless = options->window_borderless,
-            .rotation = options->rotation,
-            .mipmaps = options->mipmaps,
-            .fullscreen = options->fullscreen,
-            .buffering_time = options->display_buffer,
-        };
-
-        if (!screen_init(&s->screen, &screen_params)) {
-            goto end;
-        }
-        screen_initialized = true;
-
-        decoder_add_sink(&s->decoder, &s->screen.frame_sink);
-    }
-
-#ifdef HAVE_V4L2
-    if (options->v4l2_device) {
-        if (!sc_v4l2_sink_init(&s->v4l2_sink, options->v4l2_device,
-                               info->frame_size, options->v4l2_buffer)) {
-            goto end;
-        }
-
-        decoder_add_sink(&s->decoder, &s->v4l2_sink.frame_sink);
-
-        v4l2_sink_initialized = true;
-    }
-#endif
-
-    // now we consumed the header values, the socket receives the video stream
-    // start the stream
-    if (!stream_start(&s->stream)) {
-        goto end;
-    }
-    stream_started = true;
-
-    struct sc_key_processor *kp = NULL;
-    struct sc_mouse_processor *mp = NULL;
-
-    if (options->control) {
 #ifdef HAVE_AOA_HID
         if (options->keyboard_input_mode == SC_KEYBOARD_INPUT_MODE_HID) {
             bool aoa_hid_ok = false;
@@ -582,9 +526,12 @@ aoa_hid_end:
         mp = &s->mouse_inject.mouse_processor;
     }
 
-    struct input_manager_params im_params = {
+    if (options->display) {
+        const char *window_title =
+            options->window_title ? options->window_title : info->device_name;
+
+        struct screen_params screen_params = {
             .controller = &s->controller,
-        .screen = &s->screen,
             .kp = kp,
             .mp = mp,
             .control = options->control,
@@ -592,9 +539,47 @@ aoa_hid_end:
             .legacy_paste = options->legacy_paste,
             .clipboard_autosync = options->clipboard_autosync,
             .shortcut_mods = &options->shortcut_mods,
+            .window_title = window_title,
+            .frame_size = info->frame_size,
+            .always_on_top = options->always_on_top,
+            .window_x = options->window_x,
+            .window_y = options->window_y,
+            .window_width = options->window_width,
+            .window_height = options->window_height,
+            .window_borderless = options->window_borderless,
+            .rotation = options->rotation,
+            .mipmaps = options->mipmaps,
+            .fullscreen = options->fullscreen,
+            .buffering_time = options->display_buffer,
         };
 
-    input_manager_init(&s->input_manager, &im_params);
+        if (!screen_init(&s->screen, &screen_params)) {
+            goto end;
+        }
+        screen_initialized = true;
+
+        decoder_add_sink(&s->decoder, &s->screen.frame_sink);
+    }
+
+#ifdef HAVE_V4L2
+    if (options->v4l2_device) {
+        if (!sc_v4l2_sink_init(&s->v4l2_sink, options->v4l2_device,
+                               info->frame_size, options->v4l2_buffer)) {
+            goto end;
+        }
+
+        decoder_add_sink(&s->decoder, &s->v4l2_sink.frame_sink);
+
+        v4l2_sink_initialized = true;
+    }
+#endif
+
+    // now we consumed the header values, the socket receives the video stream
+    // start the stream
+    if (!stream_start(&s->stream)) {
+        goto end;
+    }
+    stream_started = true;
 
     ret = event_loop(s, options);
     LOGD("quit...");

app/src/screen.c

@@ -470,6 +470,20 @@ screen_init(struct screen *screen, const struct screen_params *params) {
         goto error_destroy_texture;
     }
 
+    struct input_manager_params im_params = {
+        .controller = params->controller,
+        .screen = screen,
+        .kp = params->kp,
+        .mp = params->mp,
+        .control = params->control,
+        .forward_all_clicks = params->forward_all_clicks,
+        .legacy_paste = params->legacy_paste,
+        .clipboard_autosync = params->clipboard_autosync,
+        .shortcut_mods = params->shortcut_mods,
+    };
+
+    input_manager_init(&screen->im, &im_params);
+
     // Reset the window size to trigger a SIZE_CHANGED event, to workaround
     // HiDPI issues with some SDL renderers when several displays having
     // different HiDPI scaling are connected
@@ -773,7 +787,7 @@ screen_handle_event(struct screen *screen, SDL_Event *event) {
             return true;
     }
 
-    return false;
+    return input_manager_handle_event(&screen->im, event);
 }
 
 struct sc_point

app/src/screen.h

@@ -7,10 +7,14 @@
 #include <SDL2/SDL.h>
 #include <libavformat/avformat.h>
 
+#include "controller.h"
 #include "coords.h"
 #include "fps_counter.h"
+#include "input_manager.h"
 #include "opengl.h"
+#include "trait/key_processor.h"
 #include "trait/frame_sink.h"
+#include "trait/mouse_processor.h"
 #include "video_buffer.h"
 
 struct screen {
@@ -20,6 +24,7 @@ struct screen {
     bool open; // track the open/close state to assert correct behavior
 #endif
 
+    struct input_manager im;
     struct sc_video_buffer vb;
     struct fps_counter fps_counter;
 
@@ -50,6 +55,16 @@ struct screen {
 };
 
 struct screen_params {
+    struct controller *controller;
+    struct sc_key_processor *kp;
+    struct sc_mouse_processor *mp;
+
+    bool control;
+    bool forward_all_clicks;
+    bool legacy_paste;
+    bool clipboard_autosync;
+    const struct sc_shortcut_mods *shortcut_mods;
+
     const char *window_title;
     struct sc_size frame_size;
     bool always_on_top;