src/viewer/internal.h

   1
   2 #ifndef MC_VIEWER_INTERNAL_H
   3 #define MC_VIEWER_INTERNAL_H
   4
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7 #include <sys/types.h>
   8
   9 #include "lib/global.h"
  10
  11 #include "lib/search.h"
  12
  13 #include "src/dialog.h"
  14 #include "src/widget.h"
  15 #include "src/keybind.h"                /* global_keymap_t */
  16
  17 /*** typedefs(not structures) and defined constants ********************/
  18
  19 typedef unsigned char byte;
  20
  21 /* A width or height on the screen */
  22 typedef unsigned int screen_dimen;
  23
  24 #define OFFSETTYPE_PRIX "lX"
  25 #define OFFSETTYPE_PRId "lu"
  26
  27 extern const off_t INVALID_OFFSET;
  28 extern const off_t OFFSETTYPE_MAX;
  29
  30 /*** enums *************************************************************/
  31
  32 /* data sources of the view */
  33 enum view_ds {
  34     DS_NONE,                    /* No data available */
  35     DS_STDIO_PIPE,              /* Data comes from a pipe using popen/pclose */
  36     DS_VFS_PIPE,                /* Data comes from a piped-in VFS file */
  37     DS_FILE,                    /* Data comes from a VFS file */
  38     DS_STRING                   /* Data comes from a string in memory */
  39 };
  40
  41 enum ccache_type {
  42     CCACHE_OFFSET,
  43     CCACHE_LINECOL
  44 };
  45
  46 typedef enum {
  47     NROFF_TYPE_NONE = 0,
  48     NROFF_TYPE_BOLD = 1,
  49     NROFF_TYPE_UNDERLINE = 2
  50 } nroff_type_t;
  51
  52 /*** structures declarations (and typedefs of structures)***************/
  53
  54 /* A node for building a change list on change_list */
  55 struct hexedit_change_node {
  56     struct hexedit_change_node *next;
  57     off_t offset;
  58     byte value;
  59 };
  60
  61 struct area {
  62     screen_dimen top, left;
  63     screen_dimen height, width;
  64 };
  65
  66 /* A cache entry for mapping offsets into line/column pairs and vice versa.
  67  * cc_offset, cc_line, and cc_column are the 0-based values of the offset,
  68  * line and column of that cache entry. cc_nroff_column is the column
  69  * corresponding to cc_offset in nroff mode.
  70  */
  71 typedef struct {
  72     off_t cc_offset;
  73     off_t cc_line;
  74     off_t cc_column;
  75     off_t cc_nroff_column;
  76 } coord_cache_entry_t;
  77
  78 typedef struct {
  79     size_t size;
  80     size_t capacity;
  81     coord_cache_entry_t **cache;
  82 } coord_cache_t;
  83
  84 struct mcview_nroff_struct;
  85
  86 typedef struct mcview_struct {
  87     Widget widget;
  88
  89     char *filename;             /* Name of the file */
  90     char *command;              /* Command used to pipe data in */
  91
  92     enum view_ds datasource;    /* Where the displayed data comes from */
  93
  94     /* stdio pipe data source */
  95     FILE *ds_stdio_pipe;        /* Output of a shell command */
  96
  97     /* vfs pipe data source */
  98     int ds_vfs_pipe;            /* Non-seekable vfs file descriptor */
  99
 100     /* vfs file data source */
 101     int ds_file_fd;             /* File with random access */
 102     off_t ds_file_filesize;     /* Size of the file */
 103     off_t ds_file_offset;       /* Offset of the currently loaded data */
 104     byte *ds_file_data;         /* Currently loaded data */
 105     size_t ds_file_datalen;     /* Number of valid bytes in file_data */
 106     size_t ds_file_datasize;    /* Number of allocated bytes in file_data */
 107
 108     /* string data source */
 109     byte *ds_string_data;       /* The characters of the string */
 110     size_t ds_string_len;       /* The length of the string */
 111
 112     /* Growing buffers information */
 113     gboolean growbuf_in_use;    /* Use the growing buffers? */
 114     GPtrArray *growbuf_blockptr;    /* Pointer to the block pointers */
 115     size_t growbuf_lastindex;   /* Number of bytes in the last page of the
 116                                    growing buffer */
 117     gboolean growbuf_finished;  /* TRUE when all data has been read. */
 118
 119     /* Editor modes */
 120     gboolean hex_mode;          /* Hexview or Hexedit */
 121     gboolean hexedit_mode;      /* Hexedit */
 122     gboolean hexview_in_text;   /* Is the hexview cursor in the text area? */
 123     gboolean text_nroff_mode;   /* Nroff-style highlighting */
 124     gboolean text_wrap_mode;    /* Wrap text lines to fit them on the screen */
 125     gboolean magic_mode;        /* Preprocess the file using external programs */
 126     gboolean utf8;              /* It's multibyte file codeset */
 127
 128     /* Additional editor state */
 129     gboolean hexedit_lownibble; /* Are we editing the last significant nibble? */
 130     coord_cache_t *coord_cache; /* Cache for mapping offsets to cursor positions */
 131
 132     /* Display information */
 133     screen_dimen dpy_frame_size;        /* Size of the frame surrounding the real viewer */
 134     off_t dpy_start;            /* Offset of the displayed data */
 135     off_t dpy_end;              /* Offset after the displayed data */
 136     off_t dpy_text_column;      /* Number of skipped columns in non-wrap
 137                                  * text mode */
 138     off_t hex_cursor;           /* Hexview cursor position in file */
 139     screen_dimen cursor_col;    /* Cursor column */
 140     screen_dimen cursor_row;    /* Cursor row */
 141     struct hexedit_change_node *change_list;    /* Linked list of changes */
 142     struct area status_area;    /* Where the status line is displayed */
 143     struct area ruler_area;     /* Where the ruler is displayed */
 144     struct area data_area;      /* Where the data is displayed */
 145
 146     int dirty;                  /* Number of skipped updates */
 147     gboolean dpy_bbar_dirty;    /* Does the button bar need to be updated? */
 148
 149     /* Mode variables */
 150     int bytes_per_line;         /* Number of bytes per line in hex mode */
 151
 152     /* Search variables */
 153     off_t search_start;         /* First character to start searching from */
 154     off_t search_end;           /* Length of found string or 0 if none was found */
 155
 156     /* Pointer to the last search command */
 157     gboolean want_to_quit;      /* Prepare for cleanup ... */
 158
 159     /* Markers */
 160     int marker;                 /* mark to use */
 161     off_t marks[10];            /* 10 marks: 0..9 */
 162
 163     int move_dir;               /* return value from widget:
 164                                  * 0 do nothing
 165                                  * -1 view previous file
 166                                  * 1 view next file
 167                                  */
 168
 169     off_t update_steps;         /* The number of bytes between percent
 170                                  * increments */
 171     off_t update_activate;      /* Last point where we updated the status */
 172
 173     /* converter for translation of text */
 174     GIConv converter;
 175
 176     /* keymaps */
 177     const global_keymap_t *plain_map;
 178     const global_keymap_t *hex_map;
 179
 180     /* handle of search engine */
 181     mc_search_t *search;
 182     gchar *last_search_string;
 183     struct mcview_nroff_struct *search_nroff_seq;
 184
 185     int search_numNeedSkipChar;
 186 } mcview_t;
 187
 188 typedef struct mcview_nroff_struct {
 189     mcview_t *view;
 190     off_t index;
 191     int char_width;
 192     int current_char;
 193     nroff_type_t type;
 194     nroff_type_t prev_type;
 195 } mcview_nroff_t;
 196
 197 typedef struct mcview_search_options_t {
 198     mc_search_type_t type;
 199     gboolean case_sens;
 200     gboolean backwards;
 201     gboolean whole_words;
 202     gboolean all_codepages;
 203 } mcview_search_options_t;
 204
 205 /*** global variables defined in .c file *******************************/
 206
 207 extern mcview_search_options_t mcview_search_options;
 208
 209 /*** declarations of public functions **********************************/
 210
 211 /* actions_cmd.c:  */
 212 cb_ret_t mcview_callback (Widget *w, widget_msg_t msg, int parm);
 213 cb_ret_t mcview_dialog_callback (Dlg_head *h, Widget *sender,
 214                                     dlg_msg_t msg, int parm, void *data);
 215
 216 /* coord_cache.c: */
 217 coord_cache_t *coord_cache_new (void);
 218 void coord_cache_free (coord_cache_t *cache);
 219
 220 #ifdef MC_ENABLE_DEBUGGING_CODE
 221 void mcview_ccache_dump (mcview_t *view);
 222 #endif
 223
 224 void mcview_ccache_lookup (mcview_t *view, coord_cache_entry_t *coord,
 225                             enum ccache_type lookup_what);
 226
 227 /* datasource.c: */
 228 void mcview_set_datasource_none (mcview_t *);
 229 off_t mcview_get_filesize (mcview_t *);
 230 void mcview_update_filesize (mcview_t * view);
 231 char *mcview_get_ptr_file (mcview_t *, off_t);
 232 char *mcview_get_ptr_string (mcview_t *, off_t);
 233 int mcview_get_utf (mcview_t *, off_t, int *, gboolean *);
 234 gboolean mcview_get_byte_string (mcview_t *, off_t, int *);
 235 gboolean mcview_get_byte_none (mcview_t *, off_t, int *);
 236 void mcview_set_byte (mcview_t *, off_t, byte);
 237 void mcview_file_load_data (mcview_t *, off_t);
 238 void mcview_close_datasource (mcview_t *);
 239 void mcview_set_datasource_file (mcview_t *, int, const struct stat *);
 240 gboolean mcview_load_command_output (mcview_t *, const char *);
 241 void mcview_set_datasource_vfs_pipe (mcview_t *, int);
 242 void mcview_set_datasource_string (mcview_t *, const char *);
 243
 244 /* dialog.c: */
 245 gboolean mcview_dialog_search (mcview_t *view);
 246 gboolean mcview_dialog_goto (mcview_t *view, off_t *offset);
 247
 248 /* display.c: */
 249 void mcview_update (mcview_t *view);
 250 void mcview_display (mcview_t *view);
 251 void mcview_compute_areas (mcview_t *view);
 252 void mcview_update_bytes_per_line (mcview_t *view);
 253 void mcview_display_toggle_ruler (mcview_t *view);
 254 void mcview_display_clean (mcview_t *view);
 255 void mcview_display_ruler (mcview_t *view);
 256 void mcview_percent (mcview_t *view, off_t p);
 257
 258 /* growbuf.c: */
 259 void mcview_growbuf_init (mcview_t *view);
 260 void mcview_growbuf_free (mcview_t *view);
 261 off_t mcview_growbuf_filesize (mcview_t *view);
 262 void mcview_growbuf_read_until (mcview_t *view, off_t p);
 263 gboolean mcview_get_byte_growing_buffer (mcview_t *view, off_t p, int *);
 264 char *mcview_get_ptr_growing_buffer (mcview_t *view, off_t p);
 265
 266 /* hex.c: */
 267 void mcview_display_hex (mcview_t *view);
 268 gboolean mcview_hexedit_save_changes (mcview_t *view);
 269 void mcview_toggle_hexedit_mode (mcview_t *view);
 270 void mcview_hexedit_free_change_list (mcview_t *view);
 271 void mcview_enqueue_change (struct hexedit_change_node **, struct hexedit_change_node *);
 272
 273 /* lib.c: */
 274 void mcview_toggle_magic_mode (mcview_t *view);
 275 void mcview_toggle_wrap_mode (mcview_t *view);
 276 void mcview_toggle_nroff_mode (mcview_t *view);
 277 void mcview_toggle_hex_mode (mcview_t *view);
 278 gboolean mcview_ok_to_quit (mcview_t *view);
 279 void mcview_done (mcview_t *view);
 280 void mcview_select_encoding (mcview_t *view);
 281 void mcview_set_codeset (mcview_t *view);
 282 void mcview_show_error (mcview_t *view, const char *error);
 283 off_t mcview_bol (mcview_t *view, off_t current);
 284 off_t mcview_eol (mcview_t *view, off_t current);
 285
 286 /* move.c */
 287 void mcview_move_up (mcview_t *, off_t);
 288 void mcview_move_down (mcview_t *, off_t);
 289 void mcview_move_left (mcview_t *, off_t);
 290 void mcview_move_right (mcview_t *, off_t);
 291 void mcview_scroll_to_cursor (mcview_t *);
 292 void mcview_moveto_top (mcview_t *);
 293 void mcview_moveto_bottom (mcview_t *);
 294 void mcview_moveto_bol (mcview_t *);
 295 void mcview_moveto_eol (mcview_t *);
 296 void mcview_moveto_offset (mcview_t *, off_t);
 297 void mcview_moveto (mcview_t *, off_t, off_t);
 298 void mcview_coord_to_offset (mcview_t *, off_t *, off_t, off_t);
 299 void mcview_offset_to_coord (mcview_t *, off_t *, off_t *, off_t);
 300 void mcview_place_cursor (mcview_t *);
 301 void mcview_moveto_match (mcview_t *);
 302
 303 /* nroff.c: */
 304 void mcview_display_nroff (mcview_t *view);
 305 int mcview__get_nroff_real_len (mcview_t *view, off_t, off_t p);
 306
 307 mcview_nroff_t *mcview_nroff_seq_new_num (mcview_t *view, off_t p);
 308 mcview_nroff_t *mcview_nroff_seq_new (mcview_t * view);
 309 void mcview_nroff_seq_free (mcview_nroff_t **);
 310 nroff_type_t mcview_nroff_seq_info (mcview_nroff_t *);
 311 int mcview_nroff_seq_next (mcview_nroff_t *);
 312
 313 /* plain.c: */
 314 void mcview_display_text (mcview_t *);
 315
 316 /* search.c: */
 317 int mcview_search_cmd_callback (const void *user_data, gsize char_offset);
 318 int mcview_search_update_cmd_callback (const void *, gsize);
 319 void mcview_do_search (mcview_t *view);
 320
 321
 322 /*** inline functions ****************************************************************************/
 323
 324 #include "inlines.h"
 325
 326 #endif                                  /* MC_VIEWER_INTERNAL_H */