GUACAMOLE-231: Report mouse position using new "mouse" instruction. Rely on client-side cursor layer implementation.

src/common/common/cursor.h

@@ -45,10 +45,9 @@ typedef struct guac_common_cursor {
     guac_client* client;
 
     /**
-     * The cursor layer. This layer will be available to all connected users,
+     * The buffer containing the current cursor image.
-     * but will be visible only to those users who are not moving the mouse.
      */
-    guac_layer* layer;
+    guac_layer* buffer;
 
     /**
      * The width of the cursor image, in pixels.

src/common/cursor.c

@@ -26,7 +26,6 @@
 
 #include <cairo/cairo.h>
 #include <guacamole/client.h>
-#include <guacamole/layer.h>
 #include <guacamole/protocol.h>
 #include <guacamole/socket.h>
 #include <guacamole/user.h>
@@ -41,9 +40,9 @@ guac_common_cursor* guac_common_cursor_alloc(guac_client* client) {
     if (cursor == NULL)
         return NULL;
 
-    /* Associate cursor with client and allocate cursor layer */
+    /* Associate cursor with client and allocate cursor buffer */
     cursor->client = client;
-    cursor->layer= guac_client_alloc_layer(client);
+    cursor->buffer = guac_client_alloc_buffer(client);
 
     /* Allocate initial image buffer */
     cursor->image_buffer_size = GUAC_COMMON_CURSOR_DEFAULT_SIZE;
@@ -70,7 +69,7 @@ guac_common_cursor* guac_common_cursor_alloc(guac_client* client) {
 void guac_common_cursor_free(guac_common_cursor* cursor) {
 
     guac_client* client = cursor->client;
-    guac_layer* layer = cursor->layer;
+    guac_layer* buffer = cursor->buffer;
     cairo_surface_t* surface = cursor->surface;
 
     /* Free image buffer and surface */
@@ -78,11 +77,11 @@ void guac_common_cursor_free(guac_common_cursor* cursor) {
     if (surface != NULL)
         cairo_surface_destroy(surface);
 
-    /* Destroy layer within remotely-connected client */
+    /* Destroy buffer within remotely-connected client */
-    guac_protocol_send_dispose(client->socket, layer);
+    guac_protocol_send_dispose(client->socket, buffer);
 
-    /* Return layer to pool */
+    /* Return buffer to pool */
-    guac_client_free_layer(client, layer);
+    guac_client_free_buffer(client, buffer);
 
     free(cursor);
 
@@ -92,89 +91,37 @@ void guac_common_cursor_dup(guac_common_cursor* cursor, guac_user* user,
         guac_socket* socket) {
 
     /* Synchronize location */
-    guac_protocol_send_move(socket, cursor->layer, GUAC_DEFAULT_LAYER,
+    guac_protocol_send_mouse(socket, cursor->x, cursor->y);
-            cursor->x - cursor->hotspot_x,
-            cursor->y - cursor->hotspot_y,
-            INT_MAX);
 
     /* Synchronize cursor image */
     if (cursor->surface != NULL) {
-        guac_protocol_send_size(socket, cursor->layer,
+        guac_protocol_send_size(socket, cursor->buffer,
                 cursor->width, cursor->height);
 
         guac_user_stream_png(user, socket, GUAC_COMP_SRC,
-                cursor->layer, 0, 0, cursor->surface);
+                cursor->buffer, 0, 0, cursor->surface);
+
+        guac_protocol_send_cursor(socket,
+                cursor->hotspot_x, cursor->hotspot_y,
+                cursor->buffer, 0, 0, cursor->width, cursor->height);
     }
 
     guac_socket_flush(socket);
 
 }
 
-/**
- * Callback for guac_client_for_user() which shows the cursor layer for the
- * given user (if they exist). The cursor layer is normally hidden when a user
- * is moving the mouse, and will only be shown if a DIFFERENT user is moving
- * the mouse.
- *
- * @param user
- *     The user to show the cursor to, or NULL if that user does not exist.
- *
- * @param data
- *     A pointer to the guac_common_cursor structure describing the cursor to
- *     be shown.
- *
- * @return
- *     Always NULL.
- */
-static void* guac_common_cursor_show(guac_user* user, void* data) {
-
-    guac_common_cursor* cursor = (guac_common_cursor*) data;
-
-    /* Make cursor layer visible to given user */
-    if (user != NULL) {
-        guac_protocol_send_shade(user->socket, cursor->layer, 255);
-        guac_socket_flush(user->socket);
-    }
-
-    return NULL;
-
-}
-
 void guac_common_cursor_move(guac_common_cursor* cursor, guac_user* user,
         int x, int y) {
 
-    guac_user* last_user = cursor->user;
-
     /* Update current user of cursor */
-    if (last_user != user) {
+    cursor->user = user;
-
-        cursor->user = user;
-
-        /* Make cursor layer visible to previous user */
-        guac_client_for_user(cursor->client, last_user,
-                guac_common_cursor_show, cursor);
-
-        /* Show hardware cursor */
-        guac_protocol_send_cursor(user->socket,
-                cursor->hotspot_x, cursor->hotspot_y,
-                cursor->layer, 0, 0, cursor->width, cursor->height);
-
-        /* Hide cursor layer from new user */
-        guac_protocol_send_shade(user->socket, cursor->layer, 0);
-        guac_socket_flush(user->socket);
-
-    }
 
     /* Update cursor position */
     cursor->x = x;
     cursor->y = y;
 
-    guac_protocol_send_move(cursor->client->socket, cursor->layer,
+    /* Notify of change in cursor position */
-            GUAC_DEFAULT_LAYER,
+    guac_protocol_send_mouse(cursor->client->socket, x, y);
-            x - cursor->hotspot_x,
-            y - cursor->hotspot_y,
-            INT_MAX);
-
     guac_socket_flush(cursor->client->socket);
 
 }
@@ -217,65 +164,6 @@ static void guac_common_cursor_resize(guac_common_cursor* cursor,
 
 }
 
-/**
- * Callback for guac_client_foreach_user() which sends the current cursor image
- * as PNG data to each connected client.
- *
- * @param user
- *     The user to send the cursor image to.
- *
- * @param data
- *     A pointer to the guac_common_cursor structure containing the cursor
- *     image that should be sent to the given user.
- *
- * @return
- *     Always NULL.
- */
-static void* __send_user_cursor_image(guac_user* user, void* data) {
-
-    guac_common_cursor* cursor = (guac_common_cursor*) data;
-
-    guac_user_stream_png(user, user->socket, GUAC_COMP_SRC,
-            cursor->layer, 0, 0, cursor->surface);
-
-    return NULL;
-
-}
-
-/**
- * Callback for guac_client_for_user() which updates the hardware cursor and
- * hotspot for the given user (if they exist). The hardware cursor image is
- * normally hidden when a user is not moving the mouse, and will only be shown
- * if that user begins moving the mouse.
- *
- * @param user
- *     The user whose hardware cursor should be updated, or NULL if that user
- *     does not exist.
- *
- * @param data
- *     A pointer to the guac_common_cursor structure describing the cursor to
- *     be sent as the hardware cursor.
- *
- * @return
- *     Always NULL.
- */
-static void* guac_common_cursor_update(guac_user* user, void* data) {
-
-    guac_common_cursor* cursor = (guac_common_cursor*) data;
-
-    /* Update hardware cursor of current user */
-    if (user != NULL) {
-        guac_protocol_send_cursor(user->socket,
-                cursor->hotspot_x, cursor->hotspot_y,
-                cursor->layer, 0, 0, cursor->width, cursor->height);
-
-        guac_socket_flush(user->socket);
-    }
-
-    return NULL;
-
-}
-
 void guac_common_cursor_set_argb(guac_common_cursor* cursor, int hx, int hy,
     unsigned const char* data, int width, int height, int stride) {
 
@@ -295,26 +183,20 @@ void guac_common_cursor_set_argb(guac_common_cursor* cursor, int hx, int hy,
     cursor->hotspot_x = hx;
     cursor->hotspot_y = hy;
 
-    /* Update location based on new hotspot */
-    guac_protocol_send_move(cursor->client->socket, cursor->layer,
-            GUAC_DEFAULT_LAYER,
-            cursor->x - hx,
-            cursor->y - hy,
-            INT_MAX);
-
     /* Broadcast new cursor image to all users */
-    guac_protocol_send_size(cursor->client->socket, cursor->layer,
+    guac_protocol_send_size(cursor->client->socket, cursor->buffer,
             width, height);
 
-    guac_client_foreach_user(cursor->client, __send_user_cursor_image, cursor);
+    guac_client_stream_png(cursor->client, cursor->client->socket,
+            GUAC_COMP_SRC, cursor->buffer, 0, 0, cursor->surface);
+
+    /* Update cursor image */
+    guac_protocol_send_cursor(cursor->client->socket,
+            cursor->hotspot_x, cursor->hotspot_y,
+            cursor->buffer, 0, 0, cursor->width, cursor->height);
 
     guac_socket_flush(cursor->client->socket);
 
-    /* Update hardware cursor of current user (if they are indeed valid) */
-    if (cursor->user != NULL)
-        guac_client_for_user(cursor->client, cursor->user,
-                guac_common_cursor_update, cursor);
-
 }
 
 void guac_common_cursor_set_surface(guac_common_cursor* cursor, int hx, int hy,