Added file preview feature

src/fsearch.c

@@ -33,6 +33,7 @@
 #include "fsearch_window.h"
 #include "icon_resources.h"
 #include "ui_resources.h"
+#include "fsearch_preview.h"
 #include <glib.h>
 #include <glib/gi18n.h>
 #include <limits.h>
@@ -556,6 +557,9 @@ fsearch_application_shutdown(GApplication *app) {
         g_debug("[app] database thread finished.");
     }
 
+    // close the preview
+    fsearch_preview_call_close();
+
     g_clear_pointer(&fsearch->db, db_unref);
     g_clear_object(&fsearch->db_thread_cancellable);
 

src/fsearch_preview.c

@@ -0,0 +1,88 @@
+/*
+   FSearch - A fast file search utility
+   Copyright © 2020 Christian Boxdörfer
+
+   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, see <http://www.gnu.org/licenses/>.
+   */
+
+#include "fsearch_preview.h"
+#include "fsearch.h"
+
+#include <gio/gio.h>
+
+#define PREVIEWER_DBUS_NAME "org.gnome.NautilusPreviewer"
+#define PREVIEWER_DBUS_IFACE "org.gnome.NautilusPreviewer"
+#define PREVIEWER_DBUS_PATH "/org/gnome/NautilusPreviewer"
+
+static void
+preview_show_file_ready_cb(GObject *source, GAsyncResult *res, gpointer user_data) {
+    GError *error = NULL;
+
+    g_dbus_connection_call_finish(G_DBUS_CONNECTION(source), res, &error);
+
+    if (error != NULL) {
+        g_debug("Unable to call ShowFile on NautilusPreviewer: %s", error->message);
+        g_error_free(error);
+    }
+}
+
+static void
+preview_close_ready_cb(GObject *source, GAsyncResult *res, gpointer user_data) {
+    GError *error = NULL;
+
+    g_dbus_connection_call_finish(G_DBUS_CONNECTION(source), res, &error);
+
+    if (error != NULL) {
+        g_debug("Unable to call Close on NautilusPreviewer: %s", error->message);
+        g_error_free(error);
+    }
+}
+
+void
+fsearch_preview_call_show_file(GList *file_list, guint xid, gboolean close_if_already_visible) {
+    GDBusConnection *connection = g_application_get_dbus_connection(G_APPLICATION(FSEARCH_APPLICATION_DEFAULT));
+    g_autofree gchar *uri = g_filename_to_uri((char *)file_list->data, NULL, NULL);
+    GVariant *variant = g_variant_new("(sib)", uri, xid, close_if_already_visible);
+
+    g_dbus_connection_call(connection,
+                           PREVIEWER_DBUS_NAME,
+                           PREVIEWER_DBUS_PATH,
+                           PREVIEWER_DBUS_IFACE,
+                           "ShowFile",
+                           variant,
+                           NULL,
+                           G_DBUS_CALL_FLAGS_NONE,
+                           -1,
+                           NULL,
+                           preview_show_file_ready_cb,
+                           NULL);
+}
+
+void
+fsearch_preview_call_close(void) {
+    GDBusConnection *connection = g_application_get_dbus_connection(G_APPLICATION(FSEARCH_APPLICATION_DEFAULT));
+
+    g_dbus_connection_call(connection,
+                           PREVIEWER_DBUS_NAME,
+                           PREVIEWER_DBUS_PATH,
+                           PREVIEWER_DBUS_IFACE,
+                           "Close",
+                           NULL,
+                           NULL,
+                           G_DBUS_CALL_FLAGS_NO_AUTO_START,
+                           -1,
+                           NULL,
+                           preview_close_ready_cb,
+                           NULL);
+}

src/fsearch_preview.h

@@ -0,0 +1,27 @@
+/*
+   FSearch - A fast file search utility
+   Copyright © 2020 Christian Boxdörfer
+
+   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, see <http://www.gnu.org/licenses/>.
+   */
+
+#pragma once
+
+#include <glib.h>
+
+void
+fsearch_preview_call_show_file(GList *file_list, guint xid, gboolean close_if_already_visible);
+
+void
+fsearch_preview_call_close(void);

src/fsearch_window.c

@@ -508,6 +508,9 @@ on_listview_key_press_event(GtkWidget *widget, GdkEvent *event, gpointer user_da
         case GDK_KEY_KP_Enter:
             g_action_group_activate_action(group, "open", NULL);
             return GDK_EVENT_STOP;
+        case GDK_KEY_space:
+            g_action_group_activate_action(group, "preview", NULL);
+            return GDK_EVENT_STOP;
         default:
             return GDK_EVENT_PROPAGATE;
         }

src/fsearch_window_actions.c

@@ -26,6 +26,7 @@
 
 #include <glib/gi18n.h>
 #include <stdint.h>
+#include <gdk/gdkx.h>
 
 #include "fsearch_clipboard.h"
 #include "fsearch_config.h"
@@ -35,6 +36,7 @@
 #include "fsearch_statusbar.h"
 #include "fsearch_ui_utils.h"
 #include "fsearch_window_actions.h"
+#include "fsearch_preview.h"
 
 static void
 action_set_active_int(GActionGroup *group, const gchar *action_name, int32_t value) {
@@ -584,6 +586,30 @@ fsearch_window_action_open_folder(GSimpleAction *action, GVariant *variant, gpoi
     fsearch_window_action_open_generic(self, true, false);
 }
 
+static void
+fsearch_window_action_preview(GSimpleAction *action, GVariant *variant, gpointer user_data) {
+    FsearchApplicationWindow *self = user_data;
+    guint xid = 0;
+    GList *file_list = NULL;
+
+    const guint selected_rows = fsearch_application_window_get_num_selected(self);
+    if (selected_rows == 0) {
+        return;
+    }
+
+    fsearch_application_window_selection_for_each(self, prepend_full_path_to_list, &file_list);
+    file_list = g_list_reverse(file_list);
+
+    GtkWidget *toplevel = gtk_widget_get_toplevel(GTK_WIDGET(self));
+#ifdef GDK_WINDOWING_X11
+    GdkWindow *window = gtk_widget_get_window (toplevel);
+    if (GDK_IS_X11_WINDOW(window)) {
+        xid = gdk_x11_window_get_xid(gtk_widget_get_window(toplevel));
+    }
+#endif
+    fsearch_preview_call_show_file(file_list, xid, TRUE);
+}
+
 static void
 on_fsearch_window_action_open_with_response(GtkDialog *dialog, gint response_id, gpointer user_data) {
     if (response_id != GTK_RESPONSE_OK) {
@@ -825,6 +851,7 @@ static GActionEntry FsearchWindowActions[] = {
     {"open_with", fsearch_window_action_open_with, "s"},
     {"open_with_other", fsearch_window_action_open_with_other, "s"},
     {"open_folder", fsearch_window_action_open_folder},
+    {"preview", fsearch_window_action_preview},
     {"close_window", fsearch_window_action_close_window},
     {"copy_clipboard", fsearch_window_action_copy},
     {"copy_as_text_path_and_name_clipboard", fsearch_window_action_copy_full_path},

src/meson.build

@@ -51,6 +51,7 @@ libfsearch_sources = [
     'fsearch_utf.c',
     'fsearch_window.c',
     'fsearch_window_actions.c',
+    'fsearch_preview.c',
 ]
 
 if build_machine.system()=='darwin'