1 files changed, 133 insertions, 0 deletions
diff --git a/src/nautilus-clipboard.c b/src/nautilus-clipboard.c
new file mode 100644
index 000000000..36e68002d
--- /dev/null
+++ b/src/nautilus-clipboard.c
@@ -0,0 +1,133 @@
+
+/* nautilus-clipboard.c
+ *
+ * Nautilus Clipboard support.  For now, routines to support component cut
+ * and paste.
+ *
+ * Copyright (C) 1999, 2000  Free Software Foundaton
+ * Copyright (C) 2000, 2001  Eazel, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: Rebecca Schulman <rebecka@eazel.com>,
+ *          Darin Adler <darin@bentspoon.com>
+ */
+
+#include <config.h>
+#include "nautilus-clipboard.h"
+#include "nautilus-file-utilities.h"
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <string.h>
+
+static GList *
+convert_lines_to_str_list (char **lines, gboolean *cut)
+{
+	int i;
+	GList *result;
+
+	if (cut) {
+		*cut = FALSE;
+	}
+
+	if (lines[0] == NULL) {
+		return NULL;
+	}
+
+	if (strcmp (lines[0], "cut") == 0) {
+		if (cut) {
+			*cut = TRUE;
+		}
+	} else if (strcmp (lines[0], "copy") != 0) {
+		return NULL;
+	}
+
+	result = NULL;
+	for (i = 1; lines[i] != NULL; i++) {
+		result = g_list_prepend (result, g_strdup (lines[i]));
+	}
+	return g_list_reverse (result);
+}
+
+GList*
+nautilus_clipboard_get_uri_list_from_selection_data (GtkSelectionData *selection_data,
+						     gboolean *cut,
+						     GdkAtom copied_files_atom)
+{
+	GList *items;
+	char **lines;
+
+	if (gtk_selection_data_get_data_type (selection_data) != copied_files_atom
+	    || gtk_selection_data_get_length (selection_data) <= 0) {
+		items = NULL;
+	} else {
+		gchar *data;
+		/* Not sure why it's legal to assume there's an extra byte
+		 * past the end of the selection data that it's safe to write
+		 * to. But gtk_editable_selection_received does this, so I
+		 * think it is OK.
+		 */
+		data = (gchar *) gtk_selection_data_get_data (selection_data);
+		data[gtk_selection_data_get_length (selection_data)] = '\0';
+		lines = g_strsplit (data, "\n", 0);
+		items = convert_lines_to_str_list (lines, cut);
+		g_strfreev (lines);
+	}
+	
+	return items;
+}
+
+GtkClipboard *
+nautilus_clipboard_get (GtkWidget *widget)
+{
+	return gtk_clipboard_get_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
+					      GDK_SELECTION_CLIPBOARD);
+}
+
+void
+nautilus_clipboard_clear_if_colliding_uris (GtkWidget *widget,
+					    const GList *item_uris,
+					    GdkAtom copied_files_atom)
+{
+	GtkSelectionData *data;
+	GList *clipboard_item_uris, *l;
+	gboolean collision;
+
+	collision = FALSE;
+	data = gtk_clipboard_wait_for_contents (nautilus_clipboard_get (widget),
+						copied_files_atom);
+	if (data == NULL) {
+		return;
+	}
+
+	clipboard_item_uris = nautilus_clipboard_get_uri_list_from_selection_data (data, NULL,
+										   copied_files_atom);
+
+	for (l = (GList *) item_uris; l; l = l->next) {
+		if (g_list_find_custom ((GList *) item_uris, l->data,
+					(GCompareFunc) g_strcmp0)) {
+			collision = TRUE;
+			break;
+		}
+	}
+	
+	if (collision) {
+		gtk_clipboard_clear (nautilus_clipboard_get (widget));
+	}
+	
+	if (clipboard_item_uris) {
+		g_list_free_full (clipboard_item_uris, g_free);
+	}
+}