/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* e-text-event-processor.c
* Copyright (C) 2000 Helix Code, Inc.
* Author: Chris Lahey <clahey@helixcode.com>
*
* This library 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.
*
* 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gnome.h>
#include "e-text-event-processor-emacs-like.h"
static void e_text_event_processor_emacs_like_init (ETextEventProcessorEmacsLike *card);
static void e_text_event_processor_emacs_like_class_init (ETextEventProcessorEmacsLikeClass *klass);
static gint e_text_event_processor_emacs_like_event (ETextEventProcessor *tep, ETextEventProcessorEvent *event);
static ETextEventProcessorClass *parent_class = NULL;
/* The arguments we take */
enum {
ARG_0
};
static const ETextEventProcessorCommand control_keys[26] =
{
{ E_TEP_START_OF_LINE, E_TEP_MOVE, 0, "" }, /* a */
{ E_TEP_BACKWARD_CHARACTER, E_TEP_MOVE, 0, "" }, /* b */
{ E_TEP_SELECTION, E_TEP_COPY, 0, "" }, /* c */
{ E_TEP_FORWARD_CHARACTER, E_TEP_DELETE, 0, "" }, /* d */
{ E_TEP_END_OF_LINE, E_TEP_MOVE, 0, "" }, /* e */
{ E_TEP_FORWARD_CHARACTER, E_TEP_MOVE, 0, "" }, /* f */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* g */
{ E_TEP_BACKWARD_CHARACTER, E_TEP_DELETE, 0, "" }, /* h */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* i */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* j */
{ E_TEP_END_OF_LINE, E_TEP_DELETE, 0, "" }, /* k */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* l */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* m */
{ E_TEP_FORWARD_LINE, E_TEP_MOVE, 0, "" }, /* n */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* o */
{ E_TEP_BACKWARD_LINE, E_TEP_MOVE, 0, "" }, /* p */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* q */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* r */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* s */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* t */
{ E_TEP_START_OF_LINE, E_TEP_DELETE, 0, "" }, /* u */
{ E_TEP_SELECTION, E_TEP_PASTE, 0, "" }, /* v */
{ E_TEP_BACKWARD_WORD, E_TEP_DELETE, 0, "" }, /* w */
{ E_TEP_SELECTION, E_TEP_DELETE, 0, "" }, /* x */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* y */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" } /* z */
};
static const ETextEventProcessorCommand alt_keys[26] =
{
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* a */
{ E_TEP_BACKWARD_WORD, E_TEP_MOVE, 0, "" }, /* b */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* c */
{ E_TEP_FORWARD_WORD, E_TEP_DELETE, 0, "" }, /* d */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* e */
{ E_TEP_FORWARD_WORD, E_TEP_MOVE, 0, "" }, /* f */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* g */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* h */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* i */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* j */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* k */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* l */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* m */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* n */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* o */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* p */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* q */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* r */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* s */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* t */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* u */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* v */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* w */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* x */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" }, /* y */
{ E_TEP_SELECTION, E_TEP_NOP, 0, "" } /* z */
};
GtkType
e_text_event_processor_emacs_like_get_type (void)
{
static GtkType text_event_processor_emacs_like_type = 0;
if (!text_event_processor_emacs_like_type)
{
static const GtkTypeInfo text_event_processor_emacs_like_info =
{
"ETextEventProcessorEmacsLike",
sizeof (ETextEventProcessorEmacsLike),
sizeof (ETextEventProcessorEmacsLikeClass),
(GtkClassInitFunc) e_text_event_processor_emacs_like_class_init,
(GtkObjectInitFunc) e_text_event_processor_emacs_like_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
text_event_processor_emacs_like_type = gtk_type_unique (e_text_event_processor_get_type (), &text_event_processor_emacs_like_info);
}
return text_event_processor_emacs_like_type;
}
static void
e_text_event_processor_emacs_like_class_init (ETextEventProcessorEmacsLikeClass *klass)
{
GtkObjectClass *object_class;
ETextEventProcessorClass *processor_class;
object_class = (GtkObjectClass*) klass;
processor_class = (ETextEventProcessorClass*) klass;
parent_class = gtk_type_class (e_text_event_processor_get_type ());
processor_class->event = e_text_event_processor_emacs_like_event;
}
static void
e_text_event_processor_emacs_like_init (ETextEventProcessorEmacsLike *tep)
{
}
static gint
e_text_event_processor_emacs_like_event (ETextEventProcessor *tep, ETextEventProcessorEvent *event)
{
ETextEventProcessorCommand command;
ETextEventProcessorEmacsLike *tep_el = E_TEXT_EVENT_PROCESSOR_EMACS_LIKE(tep);
command.action = E_TEP_NOP;
switch (event->type) {
case GDK_BUTTON_PRESS:
if (event->button.button == 1) {
command.action = E_TEP_GRAB;
command.time = event->button.time;
gtk_signal_emit_by_name (GTK_OBJECT (tep), "command", &command);
if (event->button.state & GDK_SHIFT_MASK)
command.action = E_TEP_SELECT;
else
command.action = E_TEP_MOVE;
command.position = E_TEP_VALUE;
command.value = event->button.position;
command.time = event->button.time;
tep_el->mouse_down = TRUE;
}
break;
case GDK_BUTTON_RELEASE:
if (event->button.button == 1) {
command.action = E_TEP_UNGRAB;
command.time = event->button.time;
gtk_signal_emit_by_name (GTK_OBJECT (tep), "command", &command);
command.time = event->button.time;
tep_el->mouse_down = FALSE;
} else if (event->button.button == 2) {
command.action = E_TEP_MOVE;
command.position = E_TEP_VALUE;
command.value = event->button.position;
command.time = event->button.time;
gtk_signal_emit_by_name (GTK_OBJECT (tep), "command", &command);
command.action = E_TEP_GET_SELECTION;
command.position = E_TEP_SELECTION;
command.value = 0;
command.time = event->button.time;
}
break;
case GDK_MOTION_NOTIFY:
if (tep_el->mouse_down) {
command.action = E_TEP_SELECT;
command.position = E_TEP_VALUE;
command.time = event->motion.time;
command.value = event->motion.position;
}
break;
case GDK_KEY_PRESS:
{
ETextEventProcessorEventKey key = event->key;
command.time = event->key.time;
if (key.state & GDK_SHIFT_MASK)
command.action = E_TEP_SELECT;
else
command.action = E_TEP_MOVE;
switch(key.keyval) {
case GDK_Home:
if (key.state & GDK_CONTROL_MASK)
command.position = E_TEP_START_OF_BUFFER;
else
command.position = E_TEP_START_OF_LINE;
break;
case GDK_End:
if (key.state & GDK_CONTROL_MASK)
command.position = E_TEP_END_OF_BUFFER;
else
command.position = E_TEP_END_OF_LINE;
break;
case GDK_Page_Up: command.position = E_TEP_BACKWARD_PAGE; break;
case GDK_Page_Down: command.position = E_TEP_FORWARD_PAGE; break;
/* CUA has Ctrl-Up/Ctrl-Down as paragraph up down */
case GDK_Up: command.position = E_TEP_BACKWARD_LINE; break;
case GDK_Down: command.position = E_TEP_FORWARD_LINE; break;
case GDK_Left:
if (key.state & GDK_CONTROL_MASK)
command.position = E_TEP_BACKWARD_WORD;
else
command.position = E_TEP_BACKWARD_CHARACTER;
break;
case GDK_Right:
if (key.state & GDK_CONTROL_MASK)
command.position = E_TEP_FORWARD_WORD;
else
command.position = E_TEP_FORWARD_CHARACTER;
break;
case GDK_BackSpace:
command.action = E_TEP_DELETE;
if (key.state & GDK_CONTROL_MASK)
command.position = E_TEP_BACKWARD_WORD;
else
command.position = E_TEP_BACKWARD_CHARACTER;
break;
case GDK_Clear:
command.action = E_TEP_DELETE;
command.position = E_TEP_END_OF_LINE;
break;
case GDK_Insert:
if (key.state & GDK_SHIFT_MASK) {
command.action = E_TEP_PASTE;
command.position = E_TEP_SELECTION;
} else if (key.state & GDK_CONTROL_MASK) {
command.action = E_TEP_COPY;
command.position = E_TEP_SELECTION;
} else {
/* gtk_toggle_insert(text) -- IMPLEMENT */
}
break;
case GDK_Delete:
if (key.state & GDK_CONTROL_MASK){
command.action = E_TEP_DELETE;
command.position = E_TEP_FORWARD_WORD;
} else if (key.state & GDK_SHIFT_MASK) {
command.action = E_TEP_COPY;
command.position = E_TEP_SELECTION;
gtk_signal_emit_by_name (GTK_OBJECT (tep), "command", &command);
command.action = E_TEP_DELETE;
command.position = E_TEP_SELECTION;
} else {
command.action = E_TEP_DELETE;
command.position = E_TEP_FORWARD_CHARACTER;
}
break;
case GDK_Tab:
/* Don't insert literally */
command.action = E_TEP_NOP;
command.position = E_TEP_SELECTION;
break;
case GDK_Return:
if (key.state & GDK_CONTROL_MASK) {
command.action = E_TEP_ACTIVATE;
command.position = E_TEP_SELECTION;
} else {
command.action = E_TEP_INSERT;
command.position = E_TEP_SELECTION;
command.value = 1;
command.string = "\n";
}
break;
case GDK_Escape:
/* Don't insert literally */
command.action = E_TEP_NOP;
command.position = E_TEP_SELECTION;
break;
default:
if (key.state & GDK_CONTROL_MASK) {
if ((key.keyval >= 'A') && (key.keyval <= 'Z'))
key.keyval -= 'A' - 'a';
if ((key.keyval >= 'a') && (key.keyval <= 'z')) {
command.position = control_keys[(int) (key.keyval - 'a')].position;
if (control_keys[(int) (key.keyval - 'a')].action != E_TEP_MOVE)
command.action = control_keys[(int) (key.keyval - 'a')].action;
command.value = control_keys[(int) (key.keyval - 'a')].value;
command.string = control_keys[(int) (key.keyval - 'a')].string;
}
if (key.keyval == 'x') {
command.action = E_TEP_COPY;
command.position = E_TEP_SELECTION;
gtk_signal_emit_by_name (GTK_OBJECT (tep), "command", &command);
command.action = E_TEP_DELETE;
command.position = E_TEP_SELECTION;
}
break;
} else if (key.state & GDK_MOD1_MASK) {
if ((key.keyval >= 'A') && (key.keyval <= 'Z'))
key.keyval -= 'A' - 'a';
if ((key.keyval >= 'a') && (key.keyval <= 'z')) {
command.position = alt_keys[(int) (key.keyval - 'a')].position;
if (alt_keys[(int) (key.keyval - 'a')].action != E_TEP_MOVE)
command.action = alt_keys[(int) (key.keyval - 'a')].action;
command.value = alt_keys[(int) (key.keyval - 'a')].value;
command.string = alt_keys[(int) (key.keyval - 'a')].string;
}
} else if (key.length > 0) {
command.action = E_TEP_INSERT;
command.position = E_TEP_SELECTION;
command.value = strlen(key.string);
command.string = key.string;
} else {
command.action = E_TEP_NOP;
}
}
break;
case GDK_KEY_RELEASE:
command.time = event->key.time;
command.action = E_TEP_NOP;
break;
default:
command.action = E_TEP_NOP;
break;
}
}
if (command.action != E_TEP_NOP) {
gtk_signal_emit_by_name (GTK_OBJECT (tep), "command", &command);
return 1;
}
else
return 0;
}
ETextEventProcessor *
e_text_event_processor_emacs_like_new (void)
{
ETextEventProcessorEmacsLike *retval = gtk_type_new (e_text_event_processor_emacs_like_get_type ());
return E_TEXT_EVENT_PROCESSOR (retval);
}
