int guac_rdp_user_mouse_handler()

in src/protocols/rdp/input.c [37:131]

• 56 lines of code
• 17 McCabe index (conditional complexity)

int guac_rdp_user_mouse_handler(guac_user* user, int x, int y, int mask) {

    guac_client* client = user->client;
    guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;

    pthread_rwlock_rdlock(&(rdp_client->lock));

    /* Skip if not yet connected */
    freerdp* rdp_inst = rdp_client->rdp_inst;
    if (rdp_inst == NULL)
        goto complete;

    /* Store current mouse location/state */
    guac_common_cursor_update(rdp_client->display->cursor, user, x, y, mask);

    /* Report mouse position within recording */
    if (rdp_client->recording != NULL)
        guac_recording_report_mouse(rdp_client->recording, x, y, mask);

    /* If button mask unchanged, just send move event */
    if (mask == rdp_client->mouse_button_mask) {
        pthread_mutex_lock(&(rdp_client->message_lock));
        rdp_inst->input->MouseEvent(rdp_inst->input, PTR_FLAGS_MOVE, x, y);
        pthread_mutex_unlock(&(rdp_client->message_lock));
    }

    /* Otherwise, send events describing button change */
    else {

        /* Mouse buttons which have JUST become released */
        int released_mask =  rdp_client->mouse_button_mask & ~mask;

        /* Mouse buttons which have JUST become pressed */
        int pressed_mask  = ~rdp_client->mouse_button_mask &  mask;

        /* Release event */
        if (released_mask & 0x07) {

            /* Calculate flags */
            int flags = 0;
            if (released_mask & 0x01) flags |= PTR_FLAGS_BUTTON1;
            if (released_mask & 0x02) flags |= PTR_FLAGS_BUTTON3;
            if (released_mask & 0x04) flags |= PTR_FLAGS_BUTTON2;

            pthread_mutex_lock(&(rdp_client->message_lock));
            rdp_inst->input->MouseEvent(rdp_inst->input, flags, x, y);
            pthread_mutex_unlock(&(rdp_client->message_lock));

        }

        /* Press event */
        if (pressed_mask & 0x07) {

            /* Calculate flags */
            int flags = PTR_FLAGS_DOWN;
            if (pressed_mask & 0x01) flags |= PTR_FLAGS_BUTTON1;
            if (pressed_mask & 0x02) flags |= PTR_FLAGS_BUTTON3;
            if (pressed_mask & 0x04) flags |= PTR_FLAGS_BUTTON2;
            if (pressed_mask & 0x08) flags |= PTR_FLAGS_WHEEL | 0x78;
            if (pressed_mask & 0x10) flags |= PTR_FLAGS_WHEEL | PTR_FLAGS_WHEEL_NEGATIVE | 0x88;

            /* Send event */
            pthread_mutex_lock(&(rdp_client->message_lock));
            rdp_inst->input->MouseEvent(rdp_inst->input, flags, x, y);
            pthread_mutex_unlock(&(rdp_client->message_lock));

        }

        /* Scroll event */
        if (pressed_mask & 0x18) {

            /* Down */
            if (pressed_mask & 0x08) {
                pthread_mutex_lock(&(rdp_client->message_lock));
                rdp_inst->input->MouseEvent(rdp_inst->input, PTR_FLAGS_WHEEL | 0x78, x, y);
                pthread_mutex_unlock(&(rdp_client->message_lock));
            }

            /* Up */
            if (pressed_mask & 0x10) {
                pthread_mutex_lock(&(rdp_client->message_lock));
                rdp_inst->input->MouseEvent(rdp_inst->input, PTR_FLAGS_WHEEL | PTR_FLAGS_WHEEL_NEGATIVE | 0x88, x, y);
                pthread_mutex_unlock(&(rdp_client->message_lock));
            }

        }

        rdp_client->mouse_button_mask = mask;
    }

complete:
    pthread_rwlock_unlock(&(rdp_client->lock));

    return 0;
}