forked from AuroraMiddleware/gtk
1941bf4cbf
Fri Mar 6 21:30:05 1998 Owen Taylor <owt1@cornell.edu> * gtk/gtkeditable.c: Disallow pasting into non-editable widgets. * gtk/gtktext.[ch]: -Added scrolling when dragging the selection paste the top/bottom. -Fix some of the problems with displaying the selection state before mouse release. -Disallow pasting into non-editable widgets -Fixed segfault when changing window size -Update the cursor correctly when switching between editable and non-editable * testgtk.c: Added a toggle button for editability for the text widget.
674 lines
18 KiB
C
674 lines
18 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <ctype.h>
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#include <string.h>
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#ifdef USE_XIM
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#include "gdk/gdkx.h"
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#endif
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#include "gdk/gdkkeysyms.h"
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#include "gdk/gdki18n.h"
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#include "gtkeditable.h"
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#include "gtkmain.h"
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#include "gtkselection.h"
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#include "gtksignal.h"
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#define MIN_EDITABLE_WIDTH 150
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#define DRAW_TIMEOUT 20
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#define INNER_BORDER 2
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enum {
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INSERT_TEXT,
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DELETE_TEXT,
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UPDATE_TEXT,
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GET_CHARS,
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SET_SELECTION,
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CHANGED,
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LAST_SIGNAL
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};
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typedef void (*GtkEditableSignal1) (GtkObject *object,
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gpointer arg1,
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gint arg2,
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gpointer arg3,
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gpointer data);
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typedef void (*GtkEditableSignal2) (GtkObject *object,
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gint arg1,
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gint arg2,
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gpointer data);
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typedef gpointer (*GtkEditableSignal3) (GtkObject *object,
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gint arg1,
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gint arg2,
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gpointer data);
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static void gtk_editable_marshal_signal_1 (GtkObject *object,
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GtkSignalFunc func,
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gpointer func_data,
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GtkArg *args);
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static void gtk_editable_marshal_signal_2 (GtkObject *object,
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GtkSignalFunc func,
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gpointer func_data,
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GtkArg *args);
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static void gtk_editable_marshal_signal_3 (GtkObject *object,
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GtkSignalFunc func,
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gpointer func_data,
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GtkArg *args);
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static void gtk_editable_class_init (GtkEditableClass *klass);
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static void gtk_editable_init (GtkEditable *editable);
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static void gtk_editable_finalize (GtkObject *object);
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static gint gtk_editable_selection_clear (GtkWidget *widget,
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GdkEventSelection *event);
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static void gtk_editable_selection_handler (GtkWidget *widget,
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GtkSelectionData *selection_data,
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gpointer data);
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static void gtk_editable_selection_received (GtkWidget *widget,
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GtkSelectionData *selection_data);
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static void gtk_editable_set_selection (GtkEditable *editable,
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gint start,
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gint end);
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static GtkWidgetClass *parent_class = NULL;
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static gint editable_signals[LAST_SIGNAL] = { 0 };
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static GdkAtom ctext_atom = GDK_NONE;
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static GdkAtom text_atom = GDK_NONE;
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static GdkAtom clipboard_atom = GDK_NONE;
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guint
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gtk_editable_get_type ()
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{
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static guint editable_type = 0;
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if (!editable_type)
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{
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GtkTypeInfo editable_info =
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{
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"GtkEditable",
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sizeof (GtkEditable),
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sizeof (GtkEditableClass),
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(GtkClassInitFunc) gtk_editable_class_init,
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(GtkObjectInitFunc) gtk_editable_init,
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(GtkArgSetFunc) NULL,
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(GtkArgGetFunc) NULL,
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};
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editable_type = gtk_type_unique (gtk_widget_get_type (), &editable_info);
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}
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return editable_type;
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}
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static void
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gtk_editable_class_init (GtkEditableClass *class)
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{
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GtkObjectClass *object_class;
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GtkWidgetClass *widget_class;
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object_class = (GtkObjectClass*) class;
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widget_class = (GtkWidgetClass*) class;
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parent_class = gtk_type_class (gtk_widget_get_type ());
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editable_signals[INSERT_TEXT] =
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gtk_signal_new ("insert_text",
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GTK_RUN_LAST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkEditableClass, insert_text),
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gtk_editable_marshal_signal_1,
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GTK_TYPE_NONE, 3,
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GTK_TYPE_STRING, GTK_TYPE_INT,
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GTK_TYPE_POINTER);
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editable_signals[DELETE_TEXT] =
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gtk_signal_new ("delete_text",
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GTK_RUN_LAST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkEditableClass, delete_text),
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gtk_editable_marshal_signal_2,
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GTK_TYPE_NONE, 2,
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GTK_TYPE_INT, GTK_TYPE_INT);
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editable_signals[UPDATE_TEXT] =
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gtk_signal_new ("update_text",
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GTK_RUN_LAST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkEditableClass, update_text),
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gtk_editable_marshal_signal_2,
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GTK_TYPE_NONE, 2,
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GTK_TYPE_INT, GTK_TYPE_INT);
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editable_signals[GET_CHARS] =
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gtk_signal_new ("get_chars",
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GTK_RUN_LAST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkEditableClass, get_chars),
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gtk_editable_marshal_signal_3,
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GTK_TYPE_POINTER, 2,
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GTK_TYPE_INT, GTK_TYPE_INT);
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editable_signals[SET_SELECTION] =
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gtk_signal_new ("set_selection",
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GTK_RUN_LAST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkEditableClass, set_selection),
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gtk_editable_marshal_signal_2,
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GTK_TYPE_NONE, 2,
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GTK_TYPE_INT, GTK_TYPE_INT);
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editable_signals[CHANGED] =
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gtk_signal_new ("changed",
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GTK_RUN_LAST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkEditableClass, changed),
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gtk_signal_default_marshaller,
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GTK_TYPE_NONE, 0);
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gtk_object_class_add_signals (object_class, editable_signals, LAST_SIGNAL);
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object_class->finalize = gtk_editable_finalize;
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widget_class->selection_clear_event = gtk_editable_selection_clear;
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widget_class->selection_received = gtk_editable_selection_received;
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class->insert_text = NULL;
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class->delete_text = NULL;
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class->update_text = NULL;
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class->get_chars = NULL;
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class->set_selection = NULL;
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class->changed = NULL;
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}
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static void
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gtk_editable_init (GtkEditable *editable)
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{
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GTK_WIDGET_SET_FLAGS (editable, GTK_CAN_FOCUS);
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editable->selection_start_pos = 0;
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editable->selection_end_pos = 0;
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editable->has_selection = FALSE;
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editable->editable = 1;
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editable->clipboard_text = NULL;
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#ifdef USE_XIM
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editable->ic = NULL;
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#endif
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if (!clipboard_atom)
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clipboard_atom = gdk_atom_intern ("CLIPBOARD", FALSE);
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gtk_selection_add_handler (GTK_WIDGET(editable), GDK_SELECTION_PRIMARY,
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GDK_TARGET_STRING, gtk_editable_selection_handler,
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NULL);
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gtk_selection_add_handler (GTK_WIDGET(editable), clipboard_atom,
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GDK_TARGET_STRING, gtk_editable_selection_handler,
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NULL);
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if (!text_atom)
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text_atom = gdk_atom_intern ("TEXT", FALSE);
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gtk_selection_add_handler (GTK_WIDGET(editable), GDK_SELECTION_PRIMARY,
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text_atom,
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gtk_editable_selection_handler,
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NULL);
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gtk_selection_add_handler (GTK_WIDGET(editable), clipboard_atom,
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text_atom,
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gtk_editable_selection_handler,
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NULL);
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if (!ctext_atom)
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ctext_atom = gdk_atom_intern ("COMPOUND_TEXT", FALSE);
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gtk_selection_add_handler (GTK_WIDGET(editable), GDK_SELECTION_PRIMARY,
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ctext_atom,
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gtk_editable_selection_handler,
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NULL);
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gtk_selection_add_handler (GTK_WIDGET(editable), clipboard_atom,
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ctext_atom,
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gtk_editable_selection_handler,
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NULL);
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}
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static void
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gtk_editable_marshal_signal_1 (GtkObject *object,
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GtkSignalFunc func,
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gpointer func_data,
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GtkArg *args)
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{
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GtkEditableSignal1 rfunc;
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rfunc = (GtkEditableSignal1) func;
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(* rfunc) (object, GTK_VALUE_STRING (args[0]), GTK_VALUE_INT (args[1]),
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GTK_VALUE_POINTER (args[2]), func_data);
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}
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static void
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gtk_editable_marshal_signal_2 (GtkObject *object,
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GtkSignalFunc func,
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gpointer func_data,
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GtkArg *args)
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{
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GtkEditableSignal2 rfunc;
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rfunc = (GtkEditableSignal2) func;
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(* rfunc) (object, GTK_VALUE_INT (args[0]), GTK_VALUE_INT (args[1]),
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func_data);
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}
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static void
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gtk_editable_marshal_signal_3 (GtkObject *object,
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GtkSignalFunc func,
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gpointer func_data,
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GtkArg *args)
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{
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GtkEditableSignal3 rfunc;
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gpointer *return_val;
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rfunc = (GtkEditableSignal3) func;
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return_val = GTK_RETLOC_POINTER (args[2]);
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*return_val = (* rfunc) (object,
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GTK_VALUE_INT (args[0]),
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GTK_VALUE_INT (args[1]),
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func_data);
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}
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static void
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gtk_editable_finalize (GtkObject *object)
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{
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GtkEditable *editable;
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g_return_if_fail (object != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (object));
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editable = GTK_EDITABLE (object);
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#ifdef USE_XIM
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if (editable->ic)
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{
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gdk_ic_destroy (editable->ic);
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editable->ic = NULL;
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}
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#endif
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(* GTK_OBJECT_CLASS (parent_class)->finalize) (object);
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}
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void
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gtk_editable_insert_text (GtkEditable *editable,
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const gchar *new_text,
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gint new_text_length,
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gint *position)
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{
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gchar buf[64];
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gchar *text;
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g_return_if_fail (editable != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (editable));
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if (new_text_length <= 64)
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text = buf;
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else
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text = g_new (gchar, new_text_length);
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strncpy (text, new_text, new_text_length);
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[INSERT_TEXT],
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text, new_text_length, position);
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[CHANGED]);
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if (new_text_length > 64)
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g_free (text);
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}
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void
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gtk_editable_delete_text (GtkEditable *editable,
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gint start_pos,
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gint end_pos)
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{
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g_return_if_fail (editable != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (editable));
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[DELETE_TEXT],
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start_pos, end_pos);
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[CHANGED]);
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}
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static void
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gtk_editable_update_text (GtkEditable *editable,
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gint start_pos,
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gint end_pos)
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{
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g_return_if_fail (editable != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (editable));
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[UPDATE_TEXT],
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start_pos, end_pos);
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}
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gchar *
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gtk_editable_get_chars (GtkEditable *editable,
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gint start,
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gint end)
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{
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gchar *retval = NULL;
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g_return_val_if_fail (editable != NULL, NULL);
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g_return_val_if_fail (GTK_IS_EDITABLE (editable), NULL);
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[GET_CHARS],
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start, end, &retval);
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return retval;
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}
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static void
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gtk_editable_set_selection (GtkEditable *editable,
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gint start_pos,
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gint end_pos)
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{
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g_return_if_fail (editable != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (editable));
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gtk_signal_emit (GTK_OBJECT (editable), editable_signals[SET_SELECTION],
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start_pos, end_pos);
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}
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static gint
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gtk_editable_selection_clear (GtkWidget *widget,
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GdkEventSelection *event)
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{
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GtkEditable *editable;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_EDITABLE (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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/* Let the selection handling code know that the selection
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* has been changed, since we've overriden the default handler */
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gtk_selection_clear (widget, event);
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editable = GTK_EDITABLE (widget);
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if (event->selection == GDK_SELECTION_PRIMARY)
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{
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if (editable->has_selection)
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{
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editable->has_selection = FALSE;
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gtk_editable_update_text (editable, editable->selection_start_pos,
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editable->selection_end_pos);
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}
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}
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else if (event->selection == clipboard_atom)
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{
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g_free (editable->clipboard_text);
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editable->clipboard_text = NULL;
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}
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return FALSE;
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}
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static void
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gtk_editable_selection_handler (GtkWidget *widget,
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GtkSelectionData *selection_data,
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gpointer data)
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{
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GtkEditable *editable;
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gint selection_start_pos;
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gint selection_end_pos;
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gchar *str;
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gint length;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (widget));
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editable = GTK_EDITABLE (widget);
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if (selection_data->selection == GDK_SELECTION_PRIMARY)
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{
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selection_start_pos = MIN (editable->selection_start_pos, editable->selection_end_pos);
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selection_end_pos = MAX (editable->selection_start_pos, editable->selection_end_pos);
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str = gtk_editable_get_chars(editable,
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selection_start_pos,
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selection_end_pos);
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length = selection_end_pos - selection_start_pos;
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}
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else /* CLIPBOARD */
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{
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if (!editable->clipboard_text)
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return; /* Refuse */
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str = editable->clipboard_text;
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length = strlen (editable->clipboard_text);
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}
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if (selection_data->target == GDK_SELECTION_TYPE_STRING)
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{
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gtk_selection_data_set (selection_data,
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GDK_SELECTION_TYPE_STRING,
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8*sizeof(gchar), str, length);
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}
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else if (selection_data->target == text_atom ||
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selection_data->target == ctext_atom)
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{
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guchar *text;
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gchar c;
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GdkAtom encoding;
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gint format;
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gint new_length;
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c = str[length];
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str[length] = '\0';
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gdk_string_to_compound_text (str, &encoding, &format, &text, &new_length);
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gtk_selection_data_set (selection_data, encoding, format, text, new_length);
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gdk_free_compound_text (text);
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str[length] = c;
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}
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if (str != editable->clipboard_text)
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g_free (str);
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}
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static void
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gtk_editable_selection_received (GtkWidget *widget,
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GtkSelectionData *selection_data)
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{
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GtkEditable *editable;
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gint reselect;
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gint old_pos;
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gint tmp_pos;
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enum {INVALID, STRING, CTEXT} type;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_EDITABLE (widget));
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editable = GTK_EDITABLE (widget);
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if (selection_data->type == GDK_TARGET_STRING)
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type = STRING;
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else if (selection_data->type == ctext_atom)
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type = CTEXT;
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else
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type = INVALID;
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if (type == INVALID || selection_data->length < 0)
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{
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/* avoid infinite loop */
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if (selection_data->target != GDK_TARGET_STRING)
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gtk_selection_convert (widget, selection_data->selection,
|
|
GDK_TARGET_STRING, GDK_CURRENT_TIME);
|
|
return;
|
|
}
|
|
|
|
reselect = FALSE;
|
|
|
|
if ((editable->selection_start_pos != editable->selection_end_pos) &&
|
|
(!editable->has_selection ||
|
|
(selection_data->selection == clipboard_atom)))
|
|
{
|
|
reselect = TRUE;
|
|
|
|
/* Don't want to call gtk_editable_delete_selection here if we are going
|
|
* to reclaim the selection to avoid extra server traffic */
|
|
if (editable->has_selection)
|
|
{
|
|
gtk_editable_delete_text (editable,
|
|
MIN (editable->selection_start_pos, editable->selection_end_pos),
|
|
MAX (editable->selection_start_pos, editable->selection_end_pos));
|
|
}
|
|
else
|
|
gtk_editable_delete_selection (editable);
|
|
}
|
|
|
|
tmp_pos = old_pos = editable->current_pos;
|
|
|
|
switch (type)
|
|
{
|
|
case STRING:
|
|
selection_data->data[selection_data->length] = 0;
|
|
gtk_editable_insert_text (editable, selection_data->data,
|
|
strlen (selection_data->data), &tmp_pos);
|
|
editable->current_pos = tmp_pos;
|
|
break;
|
|
case CTEXT:
|
|
{
|
|
gchar **list;
|
|
gint count;
|
|
gint i;
|
|
|
|
count = gdk_text_property_to_text_list (selection_data->type,
|
|
selection_data->format,
|
|
selection_data->data,
|
|
selection_data->length,
|
|
&list);
|
|
for (i=0; i<count; i++)
|
|
{
|
|
gtk_editable_insert_text (editable, list[i], strlen (list[i]), &tmp_pos);
|
|
editable->current_pos = tmp_pos;
|
|
}
|
|
if (count > 0)
|
|
gdk_free_text_list (list);
|
|
}
|
|
break;
|
|
case INVALID: /* quiet compiler */
|
|
break;
|
|
}
|
|
|
|
if (reselect)
|
|
gtk_editable_set_selection (editable, old_pos, editable->current_pos);
|
|
}
|
|
|
|
void
|
|
gtk_editable_delete_selection (GtkEditable *editable)
|
|
{
|
|
guint start;
|
|
guint end;
|
|
|
|
if (!editable->editable)
|
|
return;
|
|
|
|
start = editable->selection_start_pos;
|
|
end = editable->selection_end_pos;
|
|
|
|
editable->selection_start_pos = 0;
|
|
editable->selection_end_pos = 0;
|
|
|
|
if (start != end)
|
|
gtk_editable_delete_text (editable, MIN (start, end), MAX (start,end));
|
|
|
|
if (editable->has_selection)
|
|
{
|
|
editable->has_selection = FALSE;
|
|
if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) == GTK_WIDGET (editable)->window)
|
|
gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME);
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_editable_claim_selection (GtkEditable *editable,
|
|
gboolean claim,
|
|
guint32 time)
|
|
{
|
|
g_return_if_fail (GTK_WIDGET_REALIZED (editable));
|
|
|
|
if (claim)
|
|
{
|
|
if (gtk_selection_owner_set (GTK_WIDGET(editable), GDK_SELECTION_PRIMARY, time))
|
|
editable->has_selection = TRUE;
|
|
}
|
|
else
|
|
{
|
|
if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) ==
|
|
GTK_WIDGET(editable)->window)
|
|
gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY, time);
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_editable_select_region (GtkEditable *editable,
|
|
gint start,
|
|
gint end)
|
|
{
|
|
if (GTK_WIDGET_REALIZED (editable))
|
|
gtk_editable_claim_selection (editable, start != end, GDK_CURRENT_TIME);
|
|
|
|
gtk_editable_set_selection (editable, start, end);
|
|
}
|
|
|
|
void
|
|
gtk_editable_cut_clipboard (GtkEditable *editable, guint32 time)
|
|
{
|
|
gtk_editable_copy_clipboard (editable, time);
|
|
gtk_editable_delete_selection (editable);
|
|
}
|
|
|
|
void
|
|
gtk_editable_copy_clipboard (GtkEditable *editable, guint32 time)
|
|
{
|
|
gint selection_start_pos;
|
|
gint selection_end_pos;
|
|
|
|
selection_start_pos = MIN (editable->selection_start_pos, editable->selection_end_pos);
|
|
selection_end_pos = MAX (editable->selection_start_pos, editable->selection_end_pos);
|
|
|
|
if (selection_start_pos != selection_end_pos)
|
|
{
|
|
if (gtk_selection_owner_set (GTK_WIDGET (editable),
|
|
clipboard_atom,
|
|
time))
|
|
editable->clipboard_text = gtk_editable_get_chars (editable,
|
|
selection_start_pos,
|
|
selection_end_pos);
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_editable_paste_clipboard (GtkEditable *editable, guint32 time)
|
|
{
|
|
if (editable->editable)
|
|
gtk_selection_convert (GTK_WIDGET(editable),
|
|
clipboard_atom, ctext_atom, time);
|
|
}
|
|
|
|
void
|
|
gtk_editable_changed (GtkEditable *editable)
|
|
{
|
|
gtk_signal_emit (GTK_OBJECT (editable), editable_signals[CHANGED]);
|
|
}
|