rdp_monitor.c

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/*
 * Remmina - The GTK+ Remote Desktop Client
 * Copyright (C) 2016-2020 Antenore Gatta, Giovanni Panozzo
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of portions of this program with the
 *  OpenSSL library under certain conditions as described in each
 *  individual source file, and distribute linked combinations
 *  including the two.
 *  You must obey the GNU General Public License in all respects
 *  for all of the code used other than OpenSSL. *  If you modify
 *  file(s) with this exception, you may extend this exception to your
 *  version of the file(s), but you are not obligated to do so. *  If you
 *  do not wish to do so, delete this exception statement from your
 *  version. *  If you delete this exception statement from all source
 *  files in the program, then also delete it here.
 *
 */

#include "rdp_plugin.h"
#include "rdp_monitor.h"

gint remmina_rdp_utils_strpos(const gchar *haystack, const gchar *needle)
{
    TRACE_CALL(__func__);
    const gchar *sub;

    if (!*needle)
        return -1;

    sub = strstr(haystack, needle);
    if (!sub)
        return -1;

    return sub - haystack;
}

/* https://github.com/adlocode/xfwm4/blob/1d21be9ffc0fa1cea91905a07d1446c5227745f4/common/xfwm-common.c */


void remmina_rdp_monitor_get (rfContext *rfi, gchar **monitorids, guint32 *maxwidth, guint32 *maxheight)
{
    TRACE_CALL(__func__);

    GdkDisplay *display;
    GdkMonitor *monitor;
    gboolean has_custom_monitors = FALSE;

    gboolean primary_found = FALSE;

    gint n_monitors;
    gint scale;
    gint index = 0;
    gint count = 0;

    static gchar buffer[256];
    gint buffer_offset = 0;

    GdkRectangle geometry = { 0, 0, 0, 0 };
    GdkRectangle tempgeom = { 0, 0, 0, 0 };
    GdkRectangle destgeom = { 0, 0, 0, 0 };
    rdpSettings* settings;
    if (!rfi || !rfi->settings)
        return;

    settings = rfi->settings;

    *maxwidth = freerdp_settings_get_uint32(settings, FreeRDP_DesktopWidth);
    *maxheight = freerdp_settings_get_uint32(settings, FreeRDP_DesktopHeight);

    display = gdk_display_get_default ();
    n_monitors = gdk_display_get_n_monitors(display);

    /* Get monitor at windows curently in use */
    //w = gtk_widget_get_window(rfi->drawing_area);

    //current_monitor = gdk_display_get_monitor_at_window (display, w);

    /* we got monitorids as options */
    if (*monitorids)
        has_custom_monitors = TRUE;

    rdpMonitor* base = (rdpMonitor *)freerdp_settings_get_pointer(settings, FreeRDP_MonitorDefArray);
    for (gint i = 0; i < n_monitors; ++i) {
        rdpMonitor* current;
        if (has_custom_monitors) {
            REMMINA_PLUGIN_DEBUG("We have custom monitors");
            gchar itoc[11];
            snprintf(itoc, sizeof(itoc), "%d", i);
            if (remmina_rdp_utils_strpos(*monitorids, itoc) < 0 ) {
                REMMINA_PLUGIN_DEBUG("Monitor n %d it's out of the provided list", i);
                index += 1;
                continue;
            }
        }

        monitor = gdk_display_get_monitor(display, i);
        if (monitor == NULL) {
            REMMINA_PLUGIN_DEBUG("Monitor n %d does not exist or is not active", i);
            index +=1;
            continue;
        }

        monitor = gdk_display_get_monitor(display, index);
        current = &base[index];
        REMMINA_PLUGIN_DEBUG("Monitor n %d", index);
        /* If the desktop env in use doesn't have the working area concept
         * gdk_monitor_get_workarea will return the monitor geometry*/
        //gdk_monitor_get_workarea (monitor, &geometry);
        gdk_monitor_get_geometry (monitor, &geometry);
        current->x = geometry.x;
        REMMINA_PLUGIN_DEBUG("Monitor n %d x: %d", index, geometry.x);
        current->y = geometry.y;
        REMMINA_PLUGIN_DEBUG("Monitor n %d y: %d", index, geometry.y);
        /* geometry contain the application geometry, to obtain the real one
         * we must multiply by the scale factor */
        scale = gdk_monitor_get_scale_factor (monitor);
        REMMINA_PLUGIN_DEBUG("Monitor n %d scale: %d", index, scale);
        geometry.x *= scale;
        geometry.y *= scale;
        geometry.width *= scale;
        geometry.height *= scale;
        REMMINA_PLUGIN_DEBUG("Monitor n %d width: %d", index, geometry.width);
        REMMINA_PLUGIN_DEBUG("Monitor n %d height: %d", index, geometry.height);
        current->width = geometry.width;
        current->height = geometry.height;
        current->attributes.physicalHeight = gdk_monitor_get_height_mm (monitor);
        REMMINA_PLUGIN_DEBUG("Monitor n %d physical  height: %d", i, current->attributes.physicalHeight);
        current->attributes.physicalWidth = gdk_monitor_get_width_mm (monitor);
        REMMINA_PLUGIN_DEBUG("Monitor n %d physical  width: %d", i, current->attributes.physicalWidth);
        current->orig_screen = index;
        if (!primary_found) {
            freerdp_settings_set_uint32(settings, FreeRDP_MonitorLocalShiftX, current->x);
            freerdp_settings_set_uint32(settings, FreeRDP_MonitorLocalShiftY, current->y);
        }
        if (gdk_monitor_is_primary(monitor)) {
            REMMINA_PLUGIN_DEBUG ("Primary monitor found with id: %d", index);
            current->is_primary = TRUE;
            primary_found = TRUE;
            if (current->x != 0 || current->y != 0)
            {
                REMMINA_PLUGIN_DEBUG ("Primary monitor not at 0,0 coordinates: %d", index);
                freerdp_settings_set_uint32(settings, FreeRDP_MonitorLocalShiftX, current->x);
                freerdp_settings_set_uint32(settings, FreeRDP_MonitorLocalShiftY, current->y);
            }
        } else {
            if (!primary_found && current->x == 0 &&
                    current->y == 0)
            {
                REMMINA_PLUGIN_DEBUG ("Monitor %d has 0,0 coordinates", index);
                current->is_primary = TRUE;
                freerdp_settings_set_uint32(settings, FreeRDP_MonitorLocalShiftX, current->x);
                freerdp_settings_set_uint32(settings, FreeRDP_MonitorLocalShiftY, current->y);
                primary_found = TRUE;
                REMMINA_PLUGIN_DEBUG ("Primary monitor set to id: %d", index);
            }
        }
        REMMINA_PLUGIN_DEBUG ("Local X Shift: %d", freerdp_settings_get_uint32(settings, FreeRDP_MonitorLocalShiftX));
        REMMINA_PLUGIN_DEBUG ("Local Y Shift: %d", freerdp_settings_get_uint32(settings, FreeRDP_MonitorLocalShiftY));
        //current->x =
            //current->x - freerdp_settings_get_uint32(settings, FreeRDP_MonitorLocalShiftX);
        //REMMINA_PLUGIN_DEBUG("Monitor n %d calculated x: %d", index, current->x);
        //current->y =
            //current->y - freerdp_settings_get_uint32(settings, FreeRDP_MonitorLocalShiftY);
        //REMMINA_PLUGIN_DEBUG("Monitor n %d calculated y: %d", index, current->y);

        if (buffer_offset == 0)
            buffer_offset = g_sprintf(buffer + buffer_offset, "%d", i);
        else
            buffer_offset = g_sprintf(buffer + buffer_offset, ",%d", i);
        REMMINA_PLUGIN_DEBUG("Monitor IDs buffer: %s", buffer);
        gdk_rectangle_union(&tempgeom, &geometry, &destgeom);
        memcpy(&tempgeom, &destgeom, sizeof tempgeom);
        count++;
        index++;

    }
    freerdp_settings_set_uint32(settings, FreeRDP_MonitorCount, index);
    /* Subtract monitor shift from monitor variables for server-side use.
     * We maintain monitor shift value as Window requires the primary monitor to have a
     * coordinate of 0,0 In some X configurations, no monitor may have a coordinate of 0,0. This
     * can also be happen if the user requests specific monitors from the command-line as well.
     * So, we make sure to translate our primary monitor's upper-left corner to 0,0 on the
     * server.
     */
    for (gint i = 0; i < freerdp_settings_get_uint32(settings, FreeRDP_MonitorCount); i++)
    {
        rdpMonitor* current = &base[i];
        current->x =
            current->x - freerdp_settings_get_uint32(settings, FreeRDP_MonitorLocalShiftX);
        REMMINA_PLUGIN_DEBUG("Monitor n %d calculated x: %d", i, current->x);
        current->y =
            current->y - freerdp_settings_get_uint32(settings, FreeRDP_MonitorLocalShiftY);
        REMMINA_PLUGIN_DEBUG("Monitor n %d calculated y: %d", i, current->y);
    }

    REMMINA_PLUGIN_DEBUG("%d monitors on %d have been configured", freerdp_settings_get_uint32(settings, FreeRDP_MonitorCount), count);
    *maxwidth = destgeom.width;
    *maxheight = destgeom.height;
    REMMINA_PLUGIN_DEBUG("maxw and maxh: %ux%u", *maxwidth, *maxheight);
    if (n_monitors > 1)
        freerdp_settings_set_bool(rfi->settings, FreeRDP_SupportMonitorLayoutPdu, TRUE);
    *monitorids = g_strdup(buffer);
}