[WIP] Preview pane

gresources/nemo-shell-ui.xml

@@ -72,7 +72,8 @@
             <menuitem name="Show Hide Menubar" action="Show Hide Menubar"/>
 			<menuitem name="Show Hide Statusbar" action="Show Hide Statusbar"/>
             <separator/>
-			<menuitem name="Show Hide Extra Pane" action="Show Hide Extra Pane"/>
+            <menuitem name="Show Hide Extra Pane" action="Show Hide Extra Pane"/>
+			<menuitem name="Show Hide Preview Pane" action="Show Hide Preview Pane"/>
             <menuitem name="Edit Location" action="Edit Location"/>
 		</placeholder>
 		<separator/>

libnemo-private/meson.build

@@ -55,6 +55,8 @@ nemo_private_sources = [
   'nemo-monitor.c',
   'nemo-placement-grid.c',
   'nemo-places-tree-view.c',
+  'nemo-preview-details.c',
+  'nemo-preview-image.c',
   'nemo-program-choosing.c',
   'nemo-progress-info-manager.c',
   'nemo-progress-info.c',

libnemo-private/nemo-global-preferences.c

@@ -50,6 +50,7 @@ GSettings *gtk_filechooser_preferences;
 GSettings *nemo_plugin_preferences;
 GSettings *nemo_menu_config_preferences;
 GSettings *nemo_search_preferences;
+GSettings *nemo_preview_pane_preferences;
 GSettings *gnome_lockdown_preferences;
 GSettings *gnome_background_preferences;
 GSettings *gnome_media_handling_preferences;
@@ -473,6 +474,7 @@ nemo_global_preferences_init (void)
     nemo_plugin_preferences = g_settings_new("org.nemo.plugins");
     nemo_menu_config_preferences = g_settings_new("org.nemo.preferences.menu-config");
     nemo_search_preferences = g_settings_new("org.nemo.search");
+    nemo_preview_pane_preferences = g_settings_new("org.nemo.preview-pane");
 	gnome_lockdown_preferences = g_settings_new("org.cinnamon.desktop.lockdown");
 	gnome_background_preferences = g_settings_new("org.cinnamon.desktop.background");
 	gnome_media_handling_preferences = g_settings_new("org.cinnamon.desktop.media-handling");
@@ -506,6 +508,7 @@ nemo_global_preferences_finalize (void)
     g_object_unref (nemo_plugin_preferences);
     g_object_unref (nemo_menu_config_preferences);
     g_object_unref (nemo_search_preferences);
+    g_object_unref (nemo_preview_pane_preferences);
     g_object_unref (gnome_lockdown_preferences);
     g_object_unref (gnome_background_preferences);
     g_object_unref (gnome_media_handling_preferences);

libnemo-private/nemo-global-preferences.h

@@ -315,6 +315,7 @@ extern GSettings *gtk_filechooser_preferences;
 extern GSettings *nemo_plugin_preferences;
 extern GSettings *nemo_menu_config_preferences;
 extern GSettings *nemo_search_preferences;
+extern GSettings *nemo_preview_pane_preferences;
 extern GSettings *gnome_lockdown_preferences;
 extern GSettings *gnome_background_preferences;
 extern GSettings *gnome_media_handling_preferences;

libnemo-private/nemo-preview-details.c

@@ -0,0 +1,239 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/*
+ * nemo-preview-details.c - Widget for displaying file details in preview pane
+ *
+ * Copyright (C) 2025 Linux Mint
+ *
+ * Nemo 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.
+ *
+ * Nemo 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; see the file COPYING.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin Street - Suite 500,
+ * Boston, MA 02110-1335, USA.
+ */
+
+#include "nemo-preview-details.h"
+#include <glib/gi18n.h>
+
+struct _NemoPreviewDetails {
+	GtkBox parent;
+};
+
+typedef struct {
+	GtkWidget *grid;
+	GtkWidget *name_value_label;
+	GtkWidget *size_value_label;
+	GtkWidget *type_value_label;
+	GtkWidget *modified_value_label;
+	GtkWidget *permissions_value_label;
+	GtkWidget *location_value_label;
+
+	NemoFile *file;
+} NemoPreviewDetailsPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (NemoPreviewDetails, nemo_preview_details, GTK_TYPE_BOX)
+
+static void
+nemo_preview_details_finalize (GObject *object)
+{
+	NemoPreviewDetails *details;
+	NemoPreviewDetailsPrivate *priv;
+
+	details = NEMO_PREVIEW_DETAILS (object);
+	priv = nemo_preview_details_get_instance_private (details);
+
+	if (priv->file != NULL) {
+		nemo_file_unref (priv->file);
+		priv->file = NULL;
+	}
+
+	G_OBJECT_CLASS (nemo_preview_details_parent_class)->finalize (object);
+}
+
+static GtkWidget *
+create_label_pair (GtkGrid *grid, const gchar *label_text, gint row)
+{
+	GtkWidget *label;
+	GtkWidget *value;
+
+	/* Create the label (left column) */
+	label = gtk_label_new (label_text);
+	gtk_widget_set_halign (label, GTK_ALIGN_END);
+	gtk_widget_set_valign (label, GTK_ALIGN_START);
+	gtk_style_context_add_class (gtk_widget_get_style_context (label), "dim-label");
+	gtk_grid_attach (grid, label, 0, row, 1, 1);
+	gtk_widget_show (label);
+
+	/* Create the value label (right column) */
+	value = gtk_label_new ("");
+	gtk_widget_set_halign (value, GTK_ALIGN_START);
+	gtk_widget_set_valign (value, GTK_ALIGN_START);
+	gtk_label_set_selectable (GTK_LABEL (value), TRUE);
+	gtk_label_set_ellipsize (GTK_LABEL (value), PANGO_ELLIPSIZE_MIDDLE);
+	gtk_grid_attach (grid, value, 1, row, 1, 1);
+	gtk_widget_show (value);
+
+	return value;
+}
+
+static void
+nemo_preview_details_init (NemoPreviewDetails *details)
+{
+	NemoPreviewDetailsPrivate *priv;
+	GtkGrid *grid;
+
+	priv = nemo_preview_details_get_instance_private (details);
+
+	/* Create the grid for label pairs */
+	grid = GTK_GRID (gtk_grid_new ());
+	gtk_grid_set_row_spacing (grid, 6);
+	gtk_grid_set_column_spacing (grid, 12);
+	gtk_widget_set_margin_start (GTK_WIDGET (grid), 12);
+	gtk_widget_set_margin_end (GTK_WIDGET (grid), 12);
+	gtk_widget_set_margin_top (GTK_WIDGET (grid), 12);
+	gtk_widget_set_margin_bottom (GTK_WIDGET (grid), 12);
+	priv->grid = GTK_WIDGET (grid);
+
+	/* Create all the label pairs */
+	priv->name_value_label = create_label_pair (grid, _("Name:"), 0);
+	priv->size_value_label = create_label_pair (grid, _("Size:"), 1);
+	priv->type_value_label = create_label_pair (grid, _("Type:"), 2);
+	priv->modified_value_label = create_label_pair (grid, _("Modified:"), 3);
+	priv->permissions_value_label = create_label_pair (grid, _("Permissions:"), 4);
+	priv->location_value_label = create_label_pair (grid, _("Location:"), 5);
+
+	gtk_box_pack_start (GTK_BOX (details), GTK_WIDGET (grid), FALSE, FALSE, 0);
+	gtk_widget_show (GTK_WIDGET (grid));
+}
+
+static void
+nemo_preview_details_class_init (NemoPreviewDetailsClass *klass)
+{
+	GObjectClass *object_class;
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = nemo_preview_details_finalize;
+}
+
+GtkWidget *
+nemo_preview_details_new (void)
+{
+	return g_object_new (NEMO_TYPE_PREVIEW_DETAILS,
+			     "orientation", GTK_ORIENTATION_VERTICAL,
+			     "spacing", 0,
+			     NULL);
+}
+
+void
+nemo_preview_details_set_file (NemoPreviewDetails *widget,
+                                NemoFile           *file)
+{
+	NemoPreviewDetailsPrivate *priv;
+	gchar *str;
+	GFile *location;
+	GFile *parent;
+	gchar *parent_path;
+
+	g_return_if_fail (NEMO_IS_PREVIEW_DETAILS (widget));
+
+	priv = nemo_preview_details_get_instance_private (widget);
+
+	if (priv->file == file) {
+		return;
+	}
+
+	if (priv->file != NULL) {
+		nemo_file_unref (priv->file);
+	}
+
+	priv->file = file;
+
+	if (file != NULL) {
+		nemo_file_ref (file);
+
+		/* Name */
+		str = nemo_file_get_display_name (file);
+		gtk_label_set_text (GTK_LABEL (priv->name_value_label), str);
+		g_free (str);
+
+		/* Size */
+		str = nemo_file_get_string_attribute (file, "size");
+		if (str != NULL) {
+			gtk_label_set_text (GTK_LABEL (priv->size_value_label), str);
+			g_free (str);
+		} else {
+			gtk_label_set_text (GTK_LABEL (priv->size_value_label), "—");
+		}
+
+		/* Type */
+		str = nemo_file_get_string_attribute (file, "type");
+		if (str != NULL) {
+			gtk_label_set_text (GTK_LABEL (priv->type_value_label), str);
+			g_free (str);
+		} else {
+			gtk_label_set_text (GTK_LABEL (priv->type_value_label), "—");
+		}
+
+		/* Modified */
+		str = nemo_file_get_string_attribute (file, "date_modified");
+		if (str != NULL) {
+			gtk_label_set_text (GTK_LABEL (priv->modified_value_label), str);
+			g_free (str);
+		} else {
+			gtk_label_set_text (GTK_LABEL (priv->modified_value_label), "—");
+		}
+
+		/* Permissions */
+		str = nemo_file_get_string_attribute (file, "permissions");
+		if (str != NULL) {
+			gtk_label_set_text (GTK_LABEL (priv->permissions_value_label), str);
+			g_free (str);
+		} else {
+			gtk_label_set_text (GTK_LABEL (priv->permissions_value_label), "—");
+		}
+
+		/* Location */
+		location = nemo_file_get_location (file);
+		parent = g_file_get_parent (location);
+		if (parent != NULL) {
+			parent_path = g_file_get_parse_name (parent);
+			gtk_label_set_text (GTK_LABEL (priv->location_value_label), parent_path);
+			g_free (parent_path);
+			g_object_unref (parent);
+		} else {
+			gtk_label_set_text (GTK_LABEL (priv->location_value_label), "—");
+		}
+		g_object_unref (location);
+	}
+}
+
+void
+nemo_preview_details_clear (NemoPreviewDetails *widget)
+{
+	NemoPreviewDetailsPrivate *priv;
+
+	g_return_if_fail (NEMO_IS_PREVIEW_DETAILS (widget));
+
+	priv = nemo_preview_details_get_instance_private (widget);
+
+	if (priv->file != NULL) {
+		nemo_file_unref (priv->file);
+		priv->file = NULL;
+	}
+
+	gtk_label_set_text (GTK_LABEL (priv->name_value_label), "");
+	gtk_label_set_text (GTK_LABEL (priv->size_value_label), "");
+	gtk_label_set_text (GTK_LABEL (priv->type_value_label), "");
+	gtk_label_set_text (GTK_LABEL (priv->modified_value_label), "");
+	gtk_label_set_text (GTK_LABEL (priv->permissions_value_label), "");
+	gtk_label_set_text (GTK_LABEL (priv->location_value_label), "");
+}

libnemo-private/nemo-preview-details.h

@@ -0,0 +1,39 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/*
+ * nemo-preview-details.h - Widget for displaying file details in preview pane
+ *
+ * Copyright (C) 2025 Linux Mint
+ *
+ * Nemo 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.
+ *
+ * Nemo 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; see the file COPYING.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin Street - Suite 500,
+ * Boston, MA 02110-1335, USA.
+ */
+
+#ifndef NEMO_PREVIEW_DETAILS_H
+#define NEMO_PREVIEW_DETAILS_H
+
+#include <gtk/gtk.h>
+#include "nemo-file.h"
+
+#define NEMO_TYPE_PREVIEW_DETAILS (nemo_preview_details_get_type())
+
+G_DECLARE_FINAL_TYPE (NemoPreviewDetails, nemo_preview_details, NEMO, PREVIEW_DETAILS, GtkBox)
+GtkWidget *nemo_preview_details_new      (void);
+
+void       nemo_preview_details_set_file (NemoPreviewDetails *widget,
+                                          NemoFile           *file);
+void       nemo_preview_details_clear    (NemoPreviewDetails *widget);
+
+#endif /* NEMO_PREVIEW_DETAILS_H */