2 Internal file viewer for the Midnight Commander
3 Common finctions (used from some other mcviewer functions)
5 Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
6 2004, 2005, 2006, 2007, 2009, 2011
7 The Free Software Foundation, Inc.
10 Miguel de Icaza, 1994, 1995, 1998
11 Janne Kukonlehto, 1994, 1995
13 Joseph M. Hinkle, 1996
16 Roland Illig <roland.illig@gmx.de>, 2004, 2005
17 Slava Zanko <slavazanko@google.com>, 2009
18 Andrew Borodin <aborodin@vmail.ru>, 2009
19 Ilia Maslakov <il.smind@gmail.com>, 2009
21 This file is part of the Midnight Commander.
23 The Midnight Commander is free software: you can redistribute it
24 and/or modify it under the terms of the GNU General Public License as
25 published by the Free Software Foundation, either version 3 of the License,
26 or (at your option) any later version.
28 The Midnight Commander is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU General Public License for more details.
33 You should have received a copy of the GNU General Public License
34 along with this program. If not, see <http://www.gnu.org/licenses/>.
40 #include <sys/types.h>
42 #include "lib/global.h"
43 #include "lib/vfs/vfs.h"
44 #include "lib/strutil.h"
45 #include "lib/util.h" /* save_file_position() */
46 #include "lib/widget.h"
48 #include "lib/charsets.h"
52 #include "src/selcodepage.h"
58 /*** global variables ****************************************************************************/
60 #define OFF_T_BITWIDTH (unsigned int) (sizeof (off_t) * CHAR_BIT - 1)
61 const off_t INVALID_OFFSET
= (off_t
) - 1;
62 const off_t OFFSETTYPE_MAX
= ((off_t
) 1 << (OFF_T_BITWIDTH
- 1)) - 1;
64 /*** file scope macro definitions ****************************************************************/
66 /*** file scope type declarations ****************************************************************/
68 /*** file scope variables ************************************************************************/
70 /*** file scope functions ************************************************************************/
71 /* --------------------------------------------------------------------------------------------- */
73 /* --------------------------------------------------------------------------------------------- */
74 /*** public functions ****************************************************************************/
75 /* --------------------------------------------------------------------------------------------- */
78 mcview_toggle_magic_mode (mcview_t
* view
)
80 char *filename
, *command
;
82 int *dir_count
, *dir_idx
;
84 mcview_altered_magic_flag
= 1;
85 view
->magic_mode
= !view
->magic_mode
;
88 filename
= vfs_path_to_str (view
->filename_vpath
);
89 command
= g_strdup (view
->command
);
91 dir_count
= view
->dir_count
;
92 dir_idx
= view
->dir_idx
;
94 view
->dir_count
= NULL
;
98 mcview_load (view
, command
, filename
, 0);
100 view
->dir_count
= dir_count
;
101 view
->dir_idx
= dir_idx
;
105 view
->dpy_bbar_dirty
= TRUE
;
109 /* --------------------------------------------------------------------------------------------- */
112 mcview_toggle_wrap_mode (mcview_t
* view
)
114 if (view
->text_wrap_mode
)
115 view
->dpy_start
= mcview_bol (view
, view
->dpy_start
, 0);
116 view
->text_wrap_mode
= !view
->text_wrap_mode
;
117 view
->dpy_bbar_dirty
= TRUE
;
121 /* --------------------------------------------------------------------------------------------- */
124 mcview_toggle_nroff_mode (mcview_t
* view
)
126 view
->text_nroff_mode
= !view
->text_nroff_mode
;
127 mcview_altered_nroff_flag
= 1;
128 view
->dpy_bbar_dirty
= TRUE
;
132 /* --------------------------------------------------------------------------------------------- */
135 mcview_toggle_hex_mode (mcview_t
* view
)
137 view
->hex_mode
= !view
->hex_mode
;
141 view
->hex_cursor
= view
->dpy_start
;
142 view
->dpy_start
= mcview_offset_rounddown (view
->dpy_start
, view
->bytes_per_line
);
143 widget_want_cursor (WIDGET (view
), TRUE
);
147 view
->dpy_start
= mcview_bol (view
, view
->hex_cursor
, 0);
148 view
->hex_cursor
= view
->dpy_start
;
149 widget_want_cursor (WIDGET (view
), FALSE
);
151 mcview_altered_hex_mode
= 1;
152 view
->dpy_bbar_dirty
= TRUE
;
156 /* --------------------------------------------------------------------------------------------- */
159 mcview_ok_to_quit (mcview_t
* view
)
163 if (view
->change_list
== NULL
)
166 if (!mc_global
.midnight_shutdown
)
169 r
= query_dialog (_("Quit"),
170 _("File was modified. Save with exit?"), D_NORMAL
, 3,
171 _("&Yes"), _("&No"), _("&Cancel quit"));
175 r
= query_dialog (_("Quit"),
176 _("Midnight Commander is being shut down.\nSave modified file?"),
177 D_NORMAL
, 2, _("&Yes"), _("&No"));
186 return mcview_hexedit_save_changes (view
) || mc_global
.midnight_shutdown
;
188 mcview_hexedit_free_change_list (view
);
195 /* --------------------------------------------------------------------------------------------- */
198 mcview_init (mcview_t
* view
)
202 view
->filename_vpath
= NULL
;
203 view
->workdir_vpath
= NULL
;
204 view
->command
= NULL
;
205 view
->search_nroff_seq
= NULL
;
207 mcview_set_datasource_none (view
);
209 view
->growbuf_in_use
= FALSE
;
210 /* leave the other growbuf fields uninitialized */
212 view
->hexedit_lownibble
= FALSE
;
213 view
->locked
= FALSE
;
214 view
->coord_cache
= NULL
;
217 view
->dpy_text_column
= 0;
219 view
->hex_cursor
= 0;
220 view
->cursor_col
= 0;
221 view
->cursor_row
= 0;
222 view
->change_list
= NULL
;
224 /* {status,ruler,data}_area are left uninitialized */
227 view
->dpy_bbar_dirty
= TRUE
;
228 view
->bytes_per_line
= 1;
230 view
->search_start
= 0;
231 view
->search_end
= 0;
234 for (i
= 0; i
< sizeof (view
->marks
) / sizeof (view
->marks
[0]); i
++)
237 view
->update_steps
= 0;
238 view
->update_activate
= 0;
240 view
->saved_bookmarks
= NULL
;
243 /* --------------------------------------------------------------------------------------------- */
246 mcview_done (mcview_t
* view
)
248 /* Save current file position */
249 if (mcview_remember_file_position
&& view
->filename_vpath
!= NULL
)
251 save_file_position (view
->filename_vpath
, -1, 0,
252 view
->hex_mode
? view
->hex_cursor
: view
->dpy_start
,
253 view
->saved_bookmarks
);
254 view
->saved_bookmarks
= NULL
;
257 /* Write back the global viewer mode */
258 mcview_default_hex_mode
= view
->hex_mode
;
259 mcview_default_nroff_flag
= view
->text_nroff_mode
;
260 mcview_default_magic_flag
= view
->magic_mode
;
261 mcview_global_wrap_mode
= view
->text_wrap_mode
;
263 /* Free memory used by the viewer */
265 /* view->widget needs no destructor */
267 vfs_path_free (view
->filename_vpath
);
268 view
->filename_vpath
= NULL
;
269 vfs_path_free (view
->workdir_vpath
);
270 view
->workdir_vpath
= NULL
;
271 g_free (view
->command
);
272 view
->command
= NULL
;
274 mcview_close_datasource (view
);
275 /* the growing buffer is freed with the datasource */
277 coord_cache_free (view
->coord_cache
), view
->coord_cache
= NULL
;
279 if (view
->converter
== INVALID_CONV
)
280 view
->converter
= str_cnv_from_term
;
282 if (view
->converter
!= str_cnv_from_term
)
284 str_close_conv (view
->converter
);
285 view
->converter
= str_cnv_from_term
;
288 mc_search_free (view
->search
);
290 g_free (view
->last_search_string
);
291 view
->last_search_string
= NULL
;
292 mcview_nroff_seq_free (&view
->search_nroff_seq
);
293 mcview_hexedit_free_change_list (view
);
295 if (mc_global
.mc_run_mode
== MC_RUN_VIEWER
&& view
->dir
!= NULL
)
297 /* mcviewer is the owner of file list */
298 clean_dir (view
->dir
, *view
->dir_count
);
299 g_free (view
->dir
->list
);
300 g_free (view
->dir_count
);
301 g_free (view
->dir_idx
);
308 /* --------------------------------------------------------------------------------------------- */
311 mcview_set_codeset (mcview_t
* view
)
314 const char *cp_id
= NULL
;
318 get_codepage_id (mc_global
.source_codepage
>=
319 0 ? mc_global
.source_codepage
: mc_global
.display_codepage
);
323 conv
= str_crt_conv_from (cp_id
);
324 if (conv
!= INVALID_CONV
)
326 if (view
->converter
!= str_cnv_from_term
)
327 str_close_conv (view
->converter
);
328 view
->converter
= conv
;
330 view
->utf8
= (gboolean
) str_isutf8 (cp_id
);
337 /* --------------------------------------------------------------------------------------------- */
341 mcview_select_encoding (mcview_t
* view
)
343 if (do_select_codepage ())
344 mcview_set_codeset (view
);
348 /* --------------------------------------------------------------------------------------------- */
351 mcview_show_error (mcview_t
* view
, const char *msg
)
353 mcview_close_datasource (view
);
354 if (mcview_is_in_panel (view
))
356 mcview_set_datasource_string (view
, msg
);
360 message (D_ERROR
, MSG_ERROR
, "%s", msg
);
364 /* --------------------------------------------------------------------------------------------- */
365 /** returns index of the first char in the line
366 * it is constant for all line characters
370 mcview_bol (mcview_t
* view
, off_t current
, off_t limit
)
374 filesize
= mcview_get_filesize (view
);
377 if (current
> filesize
)
379 if (!mcview_get_byte (view
, current
, &c
))
383 if (!mcview_get_byte (view
, current
- 1, &c
))
388 while (current
> 0 && current
>= limit
)
390 if (!mcview_get_byte (view
, current
- 1, &c
))
392 if (c
== '\r' || c
== '\n')
399 /* --------------------------------------------------------------------------------------------- */
400 /** returns index of last char on line + width EOL
401 * mcview_eol of the current line == mcview_bol next line
405 mcview_eol (mcview_t
* view
, off_t current
, off_t limit
)
409 filesize
= mcview_get_filesize (view
);
412 if (current
>= filesize
)
414 while (current
< filesize
&& current
< limit
)
416 if (!mcview_get_byte (view
, current
, &c
))
423 else if (prev_ch
== '\r')
433 /* --------------------------------------------------------------------------------------------- */
436 mcview_get_title (const Dlg_head
* h
, size_t len
)
438 const mcview_t
*view
= (const mcview_t
*) find_widget_type (h
, mcview_callback
);
439 const char *modified
= view
->hexedit_mode
&& (view
->change_list
!= NULL
) ? "(*) " : " ";
440 const char *file_label
;
444 view_filename
= view
->filename_vpath
!= NULL
? vfs_path_to_str (view
->filename_vpath
) : NULL
;
448 file_label
= view_filename
!= NULL
? view_filename
: view
->command
!= NULL
? view
->command
: "";
449 file_label
= str_term_trim (file_label
, len
- str_term_width1 (_("View: ")));
451 ret_str
= g_strconcat (_("View: "), modified
, file_label
, (char *) NULL
);
452 g_free (view_filename
);
456 /* --------------------------------------------------------------------------------------------- */