aboutsummaryrefslogtreecommitdiffstats
path: root/widgets/e-text/e-text-event-processor-emacs-like.c
blob: d2bf5244014a88dbb8a15eaf5a6ecfedbccb71d9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/* -*- 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) {
            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.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);
}