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Diffstat (limited to 'src/nautilus-entry.c')
| -rw-r--r-- | src/nautilus-entry.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/src/nautilus-entry.c b/src/nautilus-entry.c new file mode 100644 index 000000000..1b790a2ab --- /dev/null +++ b/src/nautilus-entry.c @@ -0,0 +1,365 @@ + +/* NautilusEntry: one-line text editing widget. This consists of bug fixes + * and other improvements to GtkEntry, and all the changes could be rolled + * into GtkEntry some day. + * + * Copyright (C) 2000 Eazel, Inc. + * + * Author: John Sullivan <sullivan@eazel.com> + * + * This library 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 library 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 library; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include "nautilus-entry.h" + +#include <string.h> +#include "nautilus-global-preferences.h" +#include <gdk/gdkkeysyms.h> +#include <gtk/gtk.h> +#include <glib/gi18n.h> + +struct NautilusEntryDetails { + gboolean special_tab_handling; + + guint select_idle_id; +}; + +enum { + SELECTION_CHANGED, + LAST_SIGNAL +}; +static guint signals[LAST_SIGNAL]; + +static void nautilus_entry_editable_init (GtkEditableInterface *iface); + +G_DEFINE_TYPE_WITH_CODE (NautilusEntry, nautilus_entry, GTK_TYPE_ENTRY, + G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE, + nautilus_entry_editable_init)); + +static GtkEditableInterface *parent_editable_interface = NULL; + +static void +nautilus_entry_init (NautilusEntry *entry) +{ + entry->details = g_new0 (NautilusEntryDetails, 1); +} + +GtkWidget * +nautilus_entry_new (void) +{ + return gtk_widget_new (NAUTILUS_TYPE_ENTRY, NULL); +} + +static void +nautilus_entry_finalize (GObject *object) +{ + NautilusEntry *entry; + + entry = NAUTILUS_ENTRY (object); + + if (entry->details->select_idle_id != 0) { + g_source_remove (entry->details->select_idle_id); + } + + g_free (entry->details); + + G_OBJECT_CLASS (nautilus_entry_parent_class)->finalize (object); +} + +static gboolean +nautilus_entry_key_press (GtkWidget *widget, GdkEventKey *event) +{ + NautilusEntry *entry; + GtkEditable *editable; + int position; + gboolean old_has, new_has; + gboolean result; + + entry = NAUTILUS_ENTRY (widget); + editable = GTK_EDITABLE (widget); + + if (!gtk_editable_get_editable (editable)) { + return FALSE; + } + + switch (event->keyval) { + case GDK_KEY_Tab: + /* The location bar entry wants TAB to work kind of + * like it does in the shell for command completion, + * so if we get a tab and there's a selection, we + * should position the insertion point at the end of + * the selection. + */ + if (entry->details->special_tab_handling && gtk_editable_get_selection_bounds (editable, NULL, NULL)) { + position = strlen (gtk_entry_get_text (GTK_ENTRY (editable))); + gtk_editable_select_region (editable, position, position); + return TRUE; + } + break; + + default: + break; + } + + old_has = gtk_editable_get_selection_bounds (editable, NULL, NULL); + + result = GTK_WIDGET_CLASS (nautilus_entry_parent_class)->key_press_event (widget, event); + + /* Pressing a key usually changes the selection if there is a selection. + * If there is not selection, we can save work by not emitting a signal. + */ + if (result) { + new_has = gtk_editable_get_selection_bounds (editable, NULL, NULL); + if (old_has || new_has) { + g_signal_emit (widget, signals[SELECTION_CHANGED], 0); + } + } + + return result; + +} + +static gboolean +nautilus_entry_motion_notify (GtkWidget *widget, GdkEventMotion *event) +{ + int result; + gboolean old_had, new_had; + int old_start, old_end, new_start, new_end; + GtkEditable *editable; + + editable = GTK_EDITABLE (widget); + + old_had = gtk_editable_get_selection_bounds (editable, &old_start, &old_end); + + result = GTK_WIDGET_CLASS (nautilus_entry_parent_class)->motion_notify_event (widget, event); + + /* Send a signal if dragging the mouse caused the selection to change. */ + if (result) { + new_had = gtk_editable_get_selection_bounds (editable, &new_start, &new_end); + if (old_had != new_had || (old_had && (old_start != new_start || old_end != new_end))) { + g_signal_emit (widget, signals[SELECTION_CHANGED], 0); + } + } + + return result; +} + +/** + * nautilus_entry_select_all + * + * Select all text, leaving the text cursor position at the end. + * + * @entry: A NautilusEntry + **/ +void +nautilus_entry_select_all (NautilusEntry *entry) +{ + g_return_if_fail (NAUTILUS_IS_ENTRY (entry)); + + gtk_editable_set_position (GTK_EDITABLE (entry), -1); + gtk_editable_select_region (GTK_EDITABLE (entry), 0, -1); +} + +static gboolean +select_all_at_idle (gpointer callback_data) +{ + NautilusEntry *entry; + + entry = NAUTILUS_ENTRY (callback_data); + + nautilus_entry_select_all (entry); + + entry->details->select_idle_id = 0; + + return FALSE; +} + +/** + * nautilus_entry_select_all_at_idle + * + * Select all text at the next idle, not immediately. + * This is useful when reacting to a key press, because + * changing the selection and the text cursor position doesn't + * work in a key_press signal handler. + * + * @entry: A NautilusEntry + **/ +void +nautilus_entry_select_all_at_idle (NautilusEntry *entry) +{ + g_return_if_fail (NAUTILUS_IS_ENTRY (entry)); + + /* If the text cursor position changes in this routine + * then gtk_entry_key_press will unselect (and we want + * to move the text cursor position to the end). + */ + + if (entry->details->select_idle_id == 0) { + entry->details->select_idle_id = g_idle_add (select_all_at_idle, entry); + } +} + +/** + * nautilus_entry_set_text + * + * This function wraps gtk_entry_set_text. It sets undo_registered + * to TRUE and preserves the old value for a later restore. This is + * done so the programmatic changes to the entry do not register + * with the undo manager. + * + * @entry: A NautilusEntry + * @test: The text to set + **/ + +void +nautilus_entry_set_text (NautilusEntry *entry, const gchar *text) +{ + g_return_if_fail (NAUTILUS_IS_ENTRY (entry)); + + gtk_entry_set_text (GTK_ENTRY (entry), text); + g_signal_emit (entry, signals[SELECTION_CHANGED], 0); +} + +static void +nautilus_entry_set_selection_bounds (GtkEditable *editable, + int start_pos, + int end_pos) +{ + parent_editable_interface->set_selection_bounds (editable, start_pos, end_pos); + + g_signal_emit (editable, signals[SELECTION_CHANGED], 0); +} + +static gboolean +nautilus_entry_button_press (GtkWidget *widget, + GdkEventButton *event) +{ + gboolean result; + + result = GTK_WIDGET_CLASS (nautilus_entry_parent_class)->button_press_event (widget, event); + + if (result) { + g_signal_emit (widget, signals[SELECTION_CHANGED], 0); + } + + return result; +} + +static gboolean +nautilus_entry_button_release (GtkWidget *widget, + GdkEventButton *event) +{ + gboolean result; + + result = GTK_WIDGET_CLASS (nautilus_entry_parent_class)->button_release_event (widget, event); + + if (result) { + g_signal_emit (widget, signals[SELECTION_CHANGED], 0); + } + + return result; +} + +static void +nautilus_entry_insert_text (GtkEditable *editable, const gchar *text, + int length, int *position) +{ + parent_editable_interface->insert_text (editable, text, length, position); + + g_signal_emit (editable, signals[SELECTION_CHANGED], 0); +} + +static void +nautilus_entry_delete_text (GtkEditable *editable, int start_pos, int end_pos) +{ + parent_editable_interface->delete_text (editable, start_pos, end_pos); + + g_signal_emit (editable, signals[SELECTION_CHANGED], 0); +} + +/* Overridden to work around GTK bug. The selection_clear_event is queued + * when the selection changes. Changing the selection to NULL and then + * back to the original selection owner still sends the event, so the + * selection owner then gets the selection ripped away from it. We ran into + * this with type-completion behavior in NautilusLocationBar (see bug 5313). + * There's a FIXME comment that seems to be about this same issue in + * gtk+/gtkselection.c, gtk_selection_clear. + */ +static gboolean +nautilus_entry_selection_clear (GtkWidget *widget, + GdkEventSelection *event) +{ + g_assert (NAUTILUS_IS_ENTRY (widget)); + + if (gdk_selection_owner_get (event->selection) == gtk_widget_get_window (widget)) { + return FALSE; + } + + return GTK_WIDGET_CLASS (nautilus_entry_parent_class)->selection_clear_event (widget, event); +} + +static void +nautilus_entry_editable_init (GtkEditableInterface *iface) +{ + parent_editable_interface = g_type_interface_peek_parent (iface); + + iface->insert_text = nautilus_entry_insert_text; + iface->delete_text = nautilus_entry_delete_text; + iface->set_selection_bounds = nautilus_entry_set_selection_bounds; + + /* Otherwise we might need some memcpy loving */ + g_assert (iface->do_insert_text != NULL); + g_assert (iface->get_position != NULL); + g_assert (iface->get_chars != NULL); +} + +static void +nautilus_entry_class_init (NautilusEntryClass *class) +{ + GtkWidgetClass *widget_class; + GObjectClass *gobject_class; + + widget_class = GTK_WIDGET_CLASS (class); + gobject_class = G_OBJECT_CLASS (class); + + widget_class->button_press_event = nautilus_entry_button_press; + widget_class->button_release_event = nautilus_entry_button_release; + widget_class->key_press_event = nautilus_entry_key_press; + widget_class->motion_notify_event = nautilus_entry_motion_notify; + widget_class->selection_clear_event = nautilus_entry_selection_clear; + + gobject_class->finalize = nautilus_entry_finalize; + + /* Set up signals */ + signals[SELECTION_CHANGED] = g_signal_new + ("selection-changed", + G_TYPE_FROM_CLASS (class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (NautilusEntryClass, selection_changed), + NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); +} + +void +nautilus_entry_set_special_tab_handling (NautilusEntry *entry, + gboolean special_tab_handling) +{ + g_return_if_fail (NAUTILUS_IS_ENTRY (entry)); + + entry->details->special_tab_handling = special_tab_handling; +} + + |