moving from https://github.com/perberos/mate-desktop-environment

1 files changed, 692 insertions, 0 deletions

diff --git a/libcaja-private/caja-clipboard.c b/libcaja-private/caja-clipboard.c
new file mode 100644
index 00000000..53a3b8d9
--- /dev/null
+++ b/libcaja-private/caja-clipboard.c
@@ -0,0 +1,692 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* caja-clipboard.c
+ *
+ * Caja 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Authors: Rebecca Schulman <[email protected]>,
+ *          Darin Adler <[email protected]>
+ */
+
+#include <config.h>
+#include "caja-clipboard.h"
+#include "caja-file-utilities.h"
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <eel/eel-glib-extensions.h>
+#include <string.h>
+
+typedef struct _TargetCallbackData TargetCallbackData;
+
+typedef void (* SelectAllCallback)    (gpointer target);
+typedef void (* ConnectCallbacksFunc) (GObject            *object,
+                                       TargetCallbackData *target_data);
+
+static void selection_changed_callback            (GtkWidget *widget,
+        gpointer callback_data);
+static void owner_change_callback (GtkClipboard        *clipboard,
+                                   GdkEventOwnerChange *event,
+                                   gpointer callback_data);
+struct _TargetCallbackData
+{
+    GtkUIManager *ui_manager;
+    GtkActionGroup *action_group;
+    gboolean shares_selection_changes;
+
+    SelectAllCallback select_all_callback;
+
+    ConnectCallbacksFunc connect_callbacks;
+    ConnectCallbacksFunc disconnect_callbacks;
+};
+
+static void
+cut_callback (gpointer target)
+{
+    g_assert (target != NULL);
+
+    g_signal_emit_by_name (target, "cut-clipboard");
+}
+
+static void
+copy_callback (gpointer target)
+{
+    g_assert (target != NULL);
+
+    g_signal_emit_by_name (target, "copy-clipboard");
+}
+
+static void
+paste_callback (gpointer target)
+{
+    g_assert (target != NULL);
+
+    g_signal_emit_by_name (target, "paste-clipboard");
+}
+
+static void
+editable_select_all_callback (gpointer target)
+{
+    GtkEditable *editable;
+
+    editable = GTK_EDITABLE (target);
+    g_assert (editable != NULL);
+
+    gtk_editable_set_position (editable, -1);
+    gtk_editable_select_region (editable, 0, -1);
+}
+
+static void
+text_view_select_all_callback (gpointer target)
+{
+    g_assert (GTK_IS_TEXT_VIEW (target));
+
+    g_signal_emit_by_name (target, "select-all", TRUE);
+}
+
+static void
+action_cut_callback (GtkAction *action,
+                     gpointer callback_data)
+{
+    cut_callback (callback_data);
+}
+
+static void
+action_copy_callback (GtkAction *action,
+                      gpointer callback_data)
+{
+    copy_callback (callback_data);
+}
+
+static void
+action_paste_callback (GtkAction *action,
+                       gpointer callback_data)
+{
+    paste_callback (callback_data);
+}
+
+static void
+action_select_all_callback (GtkAction *action,
+                            gpointer callback_data)
+{
+    TargetCallbackData *target_data;
+
+    g_assert (callback_data != NULL);
+
+    target_data = g_object_get_data (callback_data, "Caja:clipboard_target_data");
+    g_assert (target_data != NULL);
+
+    target_data->select_all_callback (callback_data);
+}
+
+static void
+received_clipboard_contents (GtkClipboard     *clipboard,
+                             GtkSelectionData *selection_data,
+                             gpointer          data)
+{
+    GtkActionGroup *action_group;
+    GtkAction *action;
+
+    action_group = data;
+
+    action = gtk_action_group_get_action (action_group,
+                                          "Paste");
+    if (action != NULL)
+    {
+        gtk_action_set_sensitive (action,
+                                  gtk_selection_data_targets_include_text (selection_data));
+    }
+
+    g_object_unref (action_group);
+}
+
+
+static void
+set_paste_sensitive_if_clipboard_contains_data (GtkActionGroup *action_group)
+{
+    GtkAction *action;
+    if (gdk_display_supports_selection_notification (gdk_display_get_default ()))
+    {
+        gtk_clipboard_request_contents (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
+                                        gdk_atom_intern ("TARGETS", FALSE),
+                                        received_clipboard_contents,
+                                        g_object_ref (action_group));
+    }
+    else
+    {
+        /* If selection notification isn't supported, always activate Paste */
+        action = gtk_action_group_get_action (action_group,
+                                              "Paste");
+        gtk_action_set_sensitive (action, TRUE);
+    }
+}
+
+static void
+set_clipboard_menu_items_sensitive (GtkActionGroup *action_group)
+{
+    GtkAction *action;
+
+    action = gtk_action_group_get_action (action_group,
+                                          "Cut");
+    gtk_action_set_sensitive (action, TRUE);
+    action = gtk_action_group_get_action (action_group,
+                                          "Copy");
+    gtk_action_set_sensitive (action, TRUE);
+}
+
+static void
+set_clipboard_menu_items_insensitive (GtkActionGroup *action_group)
+{
+    GtkAction *action;
+
+    action = gtk_action_group_get_action (action_group,
+                                          "Cut");
+    gtk_action_set_sensitive (action, FALSE);
+    action = gtk_action_group_get_action (action_group,
+                                          "Copy");
+    gtk_action_set_sensitive (action, FALSE);
+}
+
+static gboolean
+clipboard_items_are_merged_in (GtkWidget *widget)
+{
+    return GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget),
+                            "Caja:clipboard_menu_items_merged"));
+}
+
+static void
+set_clipboard_items_are_merged_in (GObject *widget_as_object,
+                                   gboolean merged_in)
+{
+    g_object_set_data (widget_as_object,
+                       "Caja:clipboard_menu_items_merged",
+                       GINT_TO_POINTER (merged_in));
+}
+
+static void
+editable_connect_callbacks (GObject *object,
+                            TargetCallbackData *target_data)
+{
+    g_signal_connect_after (object, "selection_changed",
+                            G_CALLBACK (selection_changed_callback), target_data);
+    selection_changed_callback (GTK_WIDGET (object),
+                                target_data);
+}
+
+static void
+editable_disconnect_callbacks (GObject *object,
+                               TargetCallbackData *target_data)
+{
+    g_signal_handlers_disconnect_matched (object,
+                                          G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA,
+                                          0, 0, NULL,
+                                          G_CALLBACK (selection_changed_callback),
+                                          target_data);
+}
+
+static void
+text_buffer_update_sensitivity (GtkTextBuffer *buffer,
+                                TargetCallbackData *target_data)
+{
+    g_assert (GTK_IS_TEXT_BUFFER (buffer));
+    g_assert (target_data != NULL);
+
+    if (gtk_text_buffer_get_selection_bounds (buffer, NULL, NULL))
+    {
+        set_clipboard_menu_items_sensitive (target_data->action_group);
+    }
+    else
+    {
+        set_clipboard_menu_items_insensitive (target_data->action_group);
+    }
+}
+
+static void
+text_buffer_delete_range (GtkTextBuffer *buffer,
+                          GtkTextIter   *iter1,
+                          GtkTextIter   *iter2,
+                          TargetCallbackData *target_data)
+{
+    text_buffer_update_sensitivity (buffer, target_data);
+}
+
+static void
+text_buffer_mark_set (GtkTextBuffer *buffer,
+                      GtkTextIter *iter,
+                      GtkTextMark *mark,
+                      TargetCallbackData *target_data)
+{
+    /* anonymous marks with NULL names refer to cursor moves */
+    if (gtk_text_mark_get_name (mark) != NULL)
+    {
+        text_buffer_update_sensitivity (buffer, target_data);
+    }
+}
+
+static void
+text_view_connect_callbacks (GObject *object,
+                             TargetCallbackData *target_data)
+{
+    GtkTextBuffer *buffer;
+
+    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (object));
+    g_assert (buffer);
+
+    g_signal_connect_after (buffer, "mark-set",
+                            G_CALLBACK (text_buffer_mark_set), target_data);
+    g_signal_connect_after (buffer, "delete-range",
+                            G_CALLBACK (text_buffer_delete_range), target_data);
+    text_buffer_update_sensitivity (buffer, target_data);
+}
+
+static void
+text_view_disconnect_callbacks (GObject *object,
+                                TargetCallbackData *target_data)
+{
+    GtkTextBuffer *buffer;
+
+    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (object));
+    g_assert (buffer);
+
+    g_signal_handlers_disconnect_matched (buffer,
+                                          G_SIGNAL_MATCH_DATA,
+                                          0, 0, NULL, NULL,
+                                          target_data);
+}
+
+static void
+merge_in_clipboard_menu_items (GObject *widget_as_object,
+                               TargetCallbackData *target_data)
+{
+    gboolean add_selection_callback;
+
+    g_assert (target_data != NULL);
+
+    add_selection_callback = target_data->shares_selection_changes;
+
+    gtk_ui_manager_insert_action_group (target_data->ui_manager,
+                                        target_data->action_group, 0);
+
+    set_paste_sensitive_if_clipboard_contains_data (target_data->action_group);
+
+    g_signal_connect (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD), "owner_change",
+                      G_CALLBACK (owner_change_callback), target_data);
+
+    if (add_selection_callback)
+    {
+        target_data->connect_callbacks (widget_as_object, target_data);
+    }
+    else
+    {
+        /* If we don't use sensitivity, everything should be on */
+        set_clipboard_menu_items_sensitive (target_data->action_group);
+    }
+    set_clipboard_items_are_merged_in (widget_as_object, TRUE);
+}
+
+static void
+merge_out_clipboard_menu_items (GObject *widget_as_object,
+                                TargetCallbackData *target_data)
+
+{
+    gboolean selection_callback_was_added;
+
+    g_assert (target_data != NULL);
+
+    gtk_ui_manager_remove_action_group (target_data->ui_manager,
+                                        target_data->action_group);
+
+    g_signal_handlers_disconnect_matched (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
+                                          G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA,
+                                          0, 0, NULL,
+                                          G_CALLBACK (owner_change_callback),
+                                          target_data);
+
+    selection_callback_was_added = target_data->shares_selection_changes;
+
+    if (selection_callback_was_added)
+    {
+        target_data->disconnect_callbacks (widget_as_object, target_data);
+    }
+    set_clipboard_items_are_merged_in (widget_as_object, FALSE);
+}
+
+static gboolean
+focus_changed_callback (GtkWidget *widget,
+                        GdkEventAny *event,
+                        gpointer callback_data)
+{
+    /* Connect the component to the container if the widget has focus. */
+    if (gtk_widget_has_focus (widget))
+    {
+        if (!clipboard_items_are_merged_in (widget))
+        {
+            merge_in_clipboard_menu_items (G_OBJECT (widget), callback_data);
+        }
+    }
+    else
+    {
+        if (clipboard_items_are_merged_in (widget))
+        {
+            merge_out_clipboard_menu_items (G_OBJECT (widget), callback_data);
+        }
+    }
+
+    return FALSE;
+}
+
+static void
+selection_changed_callback (GtkWidget *widget,
+                            gpointer callback_data)
+{
+    TargetCallbackData *target_data;
+    GtkEditable *editable;
+    int start, end;
+
+    target_data = (TargetCallbackData *) callback_data;
+    g_assert (target_data != NULL);
+
+    editable = GTK_EDITABLE (widget);
+    g_assert (editable != NULL);
+
+    if (gtk_editable_get_selection_bounds (editable, &start, &end) && start != end)
+    {
+        set_clipboard_menu_items_sensitive (target_data->action_group);
+    }
+    else
+    {
+        set_clipboard_menu_items_insensitive (target_data->action_group);
+    }
+}
+
+static void
+owner_change_callback (GtkClipboard        *clipboard,
+                       GdkEventOwnerChange *event,
+                       gpointer callback_data)
+{
+    TargetCallbackData *target_data;
+
+    g_assert (callback_data != NULL);
+    target_data = callback_data;
+
+    set_paste_sensitive_if_clipboard_contains_data (target_data->action_group);
+}
+
+static void
+target_destroy_callback (GtkObject *object,
+                         gpointer callback_data)
+{
+    TargetCallbackData *target_data;
+
+    g_assert (callback_data != NULL);
+    target_data = callback_data;
+
+    if (clipboard_items_are_merged_in (GTK_WIDGET(object)))
+    {
+        merge_out_clipboard_menu_items (G_OBJECT (object), callback_data);
+    }
+}
+
+static void
+target_data_free (TargetCallbackData *target_data)
+{
+    g_object_unref (target_data->action_group);
+    g_free (target_data);
+}
+
+static const GtkActionEntry clipboard_entries[] =
+{
+    /* name, stock id */      { "Cut", GTK_STOCK_CUT,
+        /* label, accelerator */    NULL, NULL,
+        /* tooltip */               N_("Cut the selected text to the clipboard"),
+        G_CALLBACK (action_cut_callback)
+    },
+    /* name, stock id */      { "Copy", GTK_STOCK_COPY,
+        /* label, accelerator */    NULL, NULL,
+        /* tooltip */               N_("Copy the selected text to the clipboard"),
+        G_CALLBACK (action_copy_callback)
+    },
+    /* name, stock id */      { "Paste", GTK_STOCK_PASTE,
+        /* label, accelerator */    NULL, NULL,
+        /* tooltip */               N_("Paste the text stored on the clipboard"),
+        G_CALLBACK (action_paste_callback)
+    },
+    /* name, stock id */      { "Select All", NULL,
+        /* label, accelerator */    N_("Select _All"), "<control>A",
+        /* tooltip */               N_("Select all the text in a text field"),
+        G_CALLBACK (action_select_all_callback)
+    },
+};
+
+static TargetCallbackData *
+initialize_clipboard_component_with_callback_data (GtkEditable *target,
+        GtkUIManager *ui_manager,
+        gboolean shares_selection_changes,
+        SelectAllCallback select_all_callback,
+        ConnectCallbacksFunc connect_callbacks,
+        ConnectCallbacksFunc disconnect_callbacks)
+{
+    GtkActionGroup *action_group;
+    TargetCallbackData *target_data;
+
+    action_group = gtk_action_group_new ("ClipboardActions");
+    gtk_action_group_set_translation_domain (action_group, GETTEXT_PACKAGE);
+    gtk_action_group_add_actions (action_group,
+                                  clipboard_entries, G_N_ELEMENTS (clipboard_entries),
+                                  target);
+
+    /* Do the actual connection of the UI to the container at
+     * focus time, and disconnect at both focus and destroy
+     * time.
+     */
+    target_data = g_new (TargetCallbackData, 1);
+    target_data->ui_manager = ui_manager;
+    target_data->action_group = action_group;
+    target_data->shares_selection_changes = shares_selection_changes;
+    target_data->select_all_callback = select_all_callback;
+    target_data->connect_callbacks = connect_callbacks;
+    target_data->disconnect_callbacks = disconnect_callbacks;
+
+    return target_data;
+}
+
+static void
+caja_clipboard_real_set_up (gpointer target,
+                            GtkUIManager *ui_manager,
+                            gboolean shares_selection_changes,
+                            SelectAllCallback select_all_callback,
+                            ConnectCallbacksFunc connect_callbacks,
+                            ConnectCallbacksFunc disconnect_callbacks)
+{
+    TargetCallbackData *target_data;
+
+    if (g_object_get_data (G_OBJECT (target), "Caja:clipboard_target_data") != NULL)
+    {
+        return;
+    }
+
+    target_data = initialize_clipboard_component_with_callback_data
+                  (target,
+                   ui_manager,
+                   shares_selection_changes,
+                   select_all_callback,
+                   connect_callbacks,
+                   disconnect_callbacks);
+
+    g_signal_connect (target, "focus_in_event",
+                      G_CALLBACK (focus_changed_callback), target_data);
+    g_signal_connect (target, "focus_out_event",
+                      G_CALLBACK (focus_changed_callback), target_data);
+    g_signal_connect (target, "destroy",
+                      G_CALLBACK (target_destroy_callback), target_data);
+
+    g_object_set_data_full (G_OBJECT (target), "Caja:clipboard_target_data",
+                            target_data, (GDestroyNotify) target_data_free);
+
+    /* Call the focus changed callback once to merge if the window is
+     * already in focus.
+     */
+    focus_changed_callback (GTK_WIDGET (target), NULL, target_data);
+}
+
+void
+caja_clipboard_set_up_editable (GtkEditable *target,
+                                GtkUIManager *ui_manager,
+                                gboolean shares_selection_changes)
+{
+    g_return_if_fail (GTK_IS_EDITABLE (target));
+    g_return_if_fail (GTK_IS_UI_MANAGER (ui_manager));
+
+    caja_clipboard_real_set_up (target, ui_manager,
+                                shares_selection_changes,
+                                editable_select_all_callback,
+                                editable_connect_callbacks,
+                                editable_disconnect_callbacks);
+}
+
+void
+caja_clipboard_set_up_text_view (GtkTextView *target,
+                                 GtkUIManager *ui_manager)
+{
+    g_return_if_fail (GTK_IS_TEXT_VIEW (target));
+    g_return_if_fail (GTK_IS_UI_MANAGER (ui_manager));
+
+    caja_clipboard_real_set_up (target, ui_manager, TRUE,
+                                text_view_select_all_callback,
+                                text_view_connect_callbacks,
+                                text_view_disconnect_callbacks);
+}
+
+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*
+caja_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
+    {
+        guchar *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 = (guchar *) 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 *
+caja_clipboard_get (GtkWidget *widget)
+{
+    return gtk_clipboard_get_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
+                                          GDK_SELECTION_CLIPBOARD);
+}
+
+void
+caja_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 (caja_clipboard_get (widget),
+                                            copied_files_atom);
+    if (data == NULL)
+    {
+        return;
+    }
+
+    clipboard_item_uris = caja_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 (caja_clipboard_get (widget));
+    }
+
+    if (clipboard_item_uris)
+    {
+        eel_g_list_free_deep (clipboard_item_uris);
+    }
+}