aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/external-editor/external-editor.c
blob: d31b0d8e54ff9de835ac2f31cd3577c4b1309142 (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
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
/*
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Holger Macht <hmacht@suse.de>
 *      based on work by Sankar P <psankar@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <mail/em-config.h>
#include <mail/em-composer-utils.h>
#include <e-msg-composer.h>

#include <glib/gi18n-lib.h>
#include <glib/gstdio.h>
#include <gdk/gdkkeysyms.h>

#include <sys/stat.h>
#ifdef HAVE_SYS_WAIT_H
#  include <sys/wait.h>
#endif

#include <stdlib.h>
#include <string.h>

#define d(x)

gboolean    e_plugin_ui_init        (GtkUIManager *manager,
                         EMsgComposer *composer);
GtkWidget * e_plugin_lib_get_configure_widget
                        (EPlugin *epl);
static void ee_editor_command_changed
                        (GtkWidget *textbox);
static void ee_editor_immediate_launch_changed
                        (GtkWidget *checkbox);
static gboolean editor_running          (void);
static gboolean key_press_cb            (GtkWidget *widget,
                         GdkEventKey *event,
                         EMsgComposer *composer);

/* used to track when the external editor is active */
static GThread *editor_thread;

gint e_plugin_lib_enable (EPlugin *ep, gint enable);

gint
e_plugin_lib_enable (EPlugin *ep,
                     gint enable)
{
    return 0;
}

void
ee_editor_command_changed (GtkWidget *textbox)
{
    const gchar *editor;
    GSettings *settings;

    editor = gtk_entry_get_text (GTK_ENTRY (textbox));
    d (printf ("\n\aeditor is : [%s] \n\a", editor));

    /* GSettings access for every key-press. Sucky ? */
    settings = g_settings_new ("org.gnome.evolution.plugin.external-editor");
    g_settings_set_string (settings, "command", editor);
    g_object_unref (settings);
}

void
ee_editor_immediate_launch_changed (GtkWidget *checkbox)
{
    gboolean immediately;
    GSettings *settings;

    immediately = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (checkbox));
    d (printf ("\n\aimmediate launch is : [%d] \n\a", immediately));

    settings = g_settings_new ("org.gnome.evolution.plugin.external-editor");
    g_settings_set_boolean (settings, "launch-on-key-press", immediately);
    g_object_unref (settings);
}

GtkWidget *
e_plugin_lib_get_configure_widget (EPlugin *epl)
{
    GtkWidget *vbox, *textbox, *label, *help;
    GtkWidget *checkbox;
    GSettings *settings;
    gchar *editor;
    gboolean checked;

    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
    textbox = gtk_entry_new ();
    label = gtk_label_new (_("Command to be executed to launch the editor: "));
    help = gtk_label_new (_("For XEmacs use \"xemacs\"\nFor Vim use \"gvim -f\""));
    settings = g_settings_new ("org.gnome.evolution.plugin.external-editor");

    editor = g_settings_get_string (settings, "command");
    if (editor) {
        gtk_entry_set_text (GTK_ENTRY (textbox), editor);
        g_free (editor);
    }

    checkbox = gtk_check_button_new_with_label (
        _("Automatically launch when a new mail is edited"));
    checked = g_settings_get_boolean (settings, "launch-on-key-press");
    if (checked)
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (checkbox), TRUE);
    g_object_unref (settings);

    gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), textbox, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), help, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), checkbox, FALSE, FALSE, 0);

    g_signal_connect (
        textbox, "changed",
        G_CALLBACK (ee_editor_command_changed), textbox);

    g_signal_connect (
        checkbox, "toggled",
        G_CALLBACK (ee_editor_immediate_launch_changed), checkbox);

    gtk_widget_show_all (vbox);

    return vbox;
}

static void
enable_disable_composer (EMsgComposer *composer,
                         gboolean enable)
{
    GtkhtmlEditor *editor;
    GtkAction *action;
    GtkActionGroup *action_group;

    g_return_if_fail (E_IS_MSG_COMPOSER (composer));

    editor = GTKHTML_EDITOR (composer);

    if (enable)
        gtkhtml_editor_run_command (editor, "editable-on");
    else
        gtkhtml_editor_run_command (editor, "editable-off");

    action = GTKHTML_EDITOR_ACTION_EDIT_MENU (composer);
    gtk_action_set_sensitive (action, enable);

    action = GTKHTML_EDITOR_ACTION_FORMAT_MENU (composer);
    gtk_action_set_sensitive (action, enable);

    action = GTKHTML_EDITOR_ACTION_INSERT_MENU (composer);
    gtk_action_set_sensitive (action, enable);

    action_group = gtkhtml_editor_get_action_group (editor, "composer");
    gtk_action_group_set_sensitive (action_group, enable);
}

static void
enable_composer (EMsgComposer *composer)
{
    enable_disable_composer (composer, TRUE);
}

static void
disable_composer (EMsgComposer *composer)
{
    enable_disable_composer (composer, FALSE);
}

/* needed because the new thread needs to call g_idle_add () */
static gboolean
update_composer_text (GArray *array)
{
    EMsgComposer *composer;
    gchar *text;

    composer = g_array_index (array, gpointer, 0);
    text = g_array_index (array, gpointer, 1);

    e_msg_composer_set_body_text (composer, text, FALSE);

    enable_composer (composer);

    g_free (text);

    return FALSE;
}

struct run_error_dialog_data
{
    EMsgComposer *composer;
    const gchar *text;
};

/* needed because the new thread needs to call g_idle_add () */
static gboolean
run_error_dialog (struct run_error_dialog_data *data)
{
    g_return_val_if_fail (data != NULL, FALSE);

    e_alert_run_dialog_for_args (GTK_WINDOW (data->composer), data->text, NULL);
    enable_composer (data->composer);

    g_free (data);

    return FALSE;
}

static gint
numlines (const gchar *text,
          gint pos)
{
    gint ctr = 0;
    gint lineno = 0;

    while (text && *text && ctr <= pos) {
        if (*text == '\n')
            lineno++;

        text++;
        ctr++;
    }

    if (lineno > 0) {
        lineno++;
    }

    return lineno;
}

static gboolean external_editor_running = FALSE;
static GMutex external_editor_running_lock;

static gpointer
external_editor_thread (gpointer user_data)
{
    EMsgComposer *composer = user_data;
    gchar *filename = NULL;
    gint status = 0;
    GSettings *settings;
    gchar *editor_cmd_line = NULL, *editor_cmd = NULL, *content;
    gint fd, position = -1, offset = -1;

    /* prefix temp files with evo so .*vimrc can be setup to recognize them */
    fd = g_file_open_tmp ("evoXXXXXX", &filename, NULL);
    if (fd > 0) {
        gsize length = 0;

        close (fd);
        d (printf ("\n\aTemporary-file Name is : [%s] \n\a", filename));

        /* Push the text (if there is one) from the composer to the file */
        content = gtkhtml_editor_get_text_plain (GTKHTML_EDITOR (composer), &length);
        g_file_set_contents (filename, content, length, NULL);
    } else {
        struct run_error_dialog_data *data;

        data = g_new0 (struct run_error_dialog_data, 1);
        data->composer = composer;
        data->text = "org.gnome.evolution.plugins.external-editor:no-temp-file";

        g_warning ("Temporary file fd is null");

        /* run_error_dialog also calls enable_composer */
        g_idle_add ((GSourceFunc) run_error_dialog, data);

        goto finished;
    }

    settings = g_settings_new ("org.gnome.evolution.plugin.external-editor");
    editor_cmd = g_settings_get_string (settings, "command");
    if (!editor_cmd) {
        if (!(editor_cmd = g_strdup (g_getenv ("EDITOR"))))
            /* Make gedit the default external editor,
             * if the default schemas are not installed
             * and no $EDITOR is set. */
            editor_cmd = g_strdup ("gedit");
    }
    g_object_unref (settings);

    if (g_strrstr (editor_cmd, "vim") != NULL
        && gtk_html_get_cursor_pos (
            gtkhtml_editor_get_html (
            GTKHTML_EDITOR (composer)), &position, &offset)
                && position >= 0 && offset >= 0) {
        gchar *tmp = editor_cmd;
        gint lineno;
        gboolean set_nofork;

        set_nofork = g_strrstr (editor_cmd, "gvim") != NULL;
        /* Increment 1 so that entering vim insert mode places you
         * in the same entry position you were at in the html. */
        offset++;

        /* calculate the line number that the cursor is in */
        lineno = numlines (content, position);

        editor_cmd = g_strdup_printf (
            "%s \"+call cursor(%d,%d)\"%s%s",
            tmp, lineno, offset,
            set_nofork ? " " : "",
            set_nofork ? "--nofork" : "");

        g_free (tmp);
    }

    g_free (content);

    editor_cmd_line = g_strconcat (editor_cmd, " ", filename, NULL);

    if (!g_spawn_command_line_sync (editor_cmd_line, NULL, NULL, &status, NULL)) {
        struct run_error_dialog_data *data;

        g_warning ("Unable to launch %s: ", editor_cmd_line);

        data = g_new0 (struct run_error_dialog_data, 1);
        data->composer = composer;
        data->text = "org.gnome.evolution.plugins.external-editor:editor-not-launchable";

        /* run_error_dialog also calls enable_composer */
        g_idle_add ((GSourceFunc) run_error_dialog, data);

        g_free (filename);
        g_free (editor_cmd_line);
        g_free (editor_cmd);
        goto finished;
    }
    g_free (editor_cmd_line);
    g_free (editor_cmd);

#ifdef HAVE_SYS_WAIT_H
    if (WEXITSTATUS (status) != 0) {
#else
    if (status) {
#endif
        d (printf ("\n\nsome problem here with external editor\n\n"));
        g_idle_add ((GSourceFunc) enable_composer, composer);
        goto finished;
    } else {
        gchar *buf;

        if (g_file_get_contents (filename, &buf, NULL, NULL)) {
            gchar *htmltext;
            GArray *array;

            htmltext = camel_text_to_html (
                buf, CAMEL_MIME_FILTER_TOHTML_PRE, 0);

            array = g_array_sized_new (
                TRUE, TRUE,
                sizeof (gpointer), 2 * sizeof (gpointer));
            array = g_array_append_val (array, composer);
            array = g_array_append_val (array, htmltext);

            g_idle_add ((GSourceFunc) update_composer_text, array);

            /* We no longer need that temporary file */
            g_remove (filename);
            g_free (filename);
        }
    }

 finished:
    g_mutex_lock (&external_editor_running_lock);
    external_editor_running = FALSE;
    g_mutex_unlock (&external_editor_running_lock);

    return NULL;
}

static void launch_editor (GtkAction *action, EMsgComposer *composer)
{
    d (printf ("\n\nexternal_editor plugin is launched \n\n"));

    if (editor_running ()) {
        d (printf ("not opening editor, because it's still running\n"));
        return;
    }

    disable_composer (composer);

    g_mutex_lock (&external_editor_running_lock);
    external_editor_running = TRUE;
    g_mutex_unlock (&external_editor_running_lock);

    editor_thread = g_thread_new (
        NULL, external_editor_thread, composer);
    g_thread_unref (editor_thread);
}

static GtkActionEntry entries[] = {
    { "ExternalEditor",
      GTK_STOCK_EDIT,
      N_("Compose in External Editor"),
      "<Shift><Control>e",
      N_("Compose in External Editor"),
      G_CALLBACK (launch_editor) }
};

static gboolean
key_press_cb (GtkWidget *widget,
              GdkEventKey *event,
              EMsgComposer *composer)
{
    GSettings *settings;
    gboolean immediately;

    /* we don't want to start the editor on any modifier keys */
    switch (event->keyval) {
    case GDK_KEY_Alt_L:
    case GDK_KEY_Alt_R:
    case GDK_KEY_Super_L:
    case GDK_KEY_Super_R:
    case GDK_KEY_Control_L:
    case GDK_KEY_Control_R:
        return FALSE;
    default:
        break;
    }

    settings = g_settings_new ("org.gnome.evolution.plugin.external-editor");
    immediately = g_settings_get_boolean (settings, "launch-on-key-press");
    g_object_unref (settings);
    if (!immediately)
        return FALSE;

    launch_editor (NULL, composer);

    return TRUE;
}

static gboolean
editor_running (void)
{
    gboolean running;

    g_mutex_lock (&external_editor_running_lock);
    running = external_editor_running;
    g_mutex_unlock (&external_editor_running_lock);

    return running;
}

static gboolean
delete_cb (GtkWidget *widget,
           EMsgComposer *composer)
{
    if (editor_running ()) {
        e_alert_run_dialog_for_args (
            NULL, "org.gnome.evolution.plugins."
            "external-editor:editor-still-running", NULL);
        return TRUE;
    }

    return FALSE;
}

gboolean
e_plugin_ui_init (GtkUIManager *manager,
                  EMsgComposer *composer)
{
    GtkhtmlEditor *editor;
    EWebViewGtkHTML *web_view;

    editor = GTKHTML_EDITOR (composer);

    /* Add actions to the "composer" action group. */
    gtk_action_group_add_actions (
        gtkhtml_editor_get_action_group (editor, "composer"),
        entries, G_N_ELEMENTS (entries), composer);

    web_view = e_msg_composer_get_web_view (composer);

    g_signal_connect (
        web_view, "key_press_event",
        G_CALLBACK (key_press_cb), composer);

    g_signal_connect (
        web_view, "delete-event",
        G_CALLBACK (delete_cb), composer);

    return TRUE;
}