src/viewer/internal.h

   1 #ifndef MC__VIEWER_INTERNAL_H
   2 #define MC__VIEWER_INTERNAL_H
   3
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <sys/types.h>
   7
   8 #include "lib/global.h"
   9
  10 #include "lib/search.h"
  11 #include "lib/widget.h"
  12
  13 #include "src/keybind-defaults.h"       /* global_keymap_t */
  14
  15 /*** typedefs(not structures) and defined constants **********************************************/
  16
  17 typedef unsigned char byte;
  18
  19 /* A width or height on the screen */
  20 typedef unsigned int screen_dimen;
  21
  22 extern const off_t INVALID_OFFSET;
  23 extern const off_t OFFSETTYPE_MAX;
  24
  25 /*** enums ***************************************************************************************/
  26
  27 /* data sources of the view */
  28 enum view_ds
  29 {
  30     DS_NONE,                    /* No data available */
  31     DS_STDIO_PIPE,              /* Data comes from a pipe using popen/pclose */
  32     DS_VFS_PIPE,                /* Data comes from a piped-in VFS file */
  33     DS_FILE,                    /* Data comes from a VFS file */
  34     DS_STRING                   /* Data comes from a string in memory */
  35 };
  36
  37 enum ccache_type
  38 {
  39     CCACHE_OFFSET,
  40     CCACHE_LINECOL
  41 };
  42
  43 typedef enum
  44 {
  45     NROFF_TYPE_NONE = 0,
  46     NROFF_TYPE_BOLD = 1,
  47     NROFF_TYPE_UNDERLINE = 2
  48 } nroff_type_t;
  49
  50 /*** structures declarations (and typedefs of structures)*****************************************/
  51
  52 /* A node for building a change list on change_list */
  53 struct hexedit_change_node
  54 {
  55     struct hexedit_change_node *next;
  56     off_t offset;
  57     byte value;
  58 };
  59
  60 struct area
  61 {
  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 {
  73     off_t cc_offset;
  74     off_t cc_line;
  75     off_t cc_column;
  76     off_t cc_nroff_column;
  77 } coord_cache_entry_t;
  78
  79 typedef struct
  80 {
  81     size_t size;
  82     size_t capacity;
  83     coord_cache_entry_t **cache;
  84 } coord_cache_t;
  85
  86 struct mcview_nroff_struct;
  87
  88 typedef struct mcview_struct
  89 {
  90     Widget widget;
  91
  92     char *filename;             /* Name of the file */
  93     char *workdir;              /* Name of the working directory */
  94     char *command;              /* Command used to pipe data in */
  95
  96     enum view_ds datasource;    /* Where the displayed data comes from */
  97
  98     /* stdio pipe data source */
  99     FILE *ds_stdio_pipe;        /* Output of a shell command */
 100
 101     /* vfs pipe data source */
 102     int ds_vfs_pipe;            /* Non-seekable vfs file descriptor */
 103
 104     /* vfs file data source */
 105     int ds_file_fd;             /* File with random access */
 106     off_t ds_file_filesize;     /* Size of the file */
 107     off_t ds_file_offset;       /* Offset of the currently loaded data */
 108     byte *ds_file_data;         /* Currently loaded data */
 109     size_t ds_file_datalen;     /* Number of valid bytes in file_data */
 110     size_t ds_file_datasize;    /* Number of allocated bytes in file_data */
 111
 112     /* string data source */
 113     byte *ds_string_data;       /* The characters of the string */
 114     size_t ds_string_len;       /* The length of the string */
 115
 116     /* Growing buffers information */
 117     gboolean growbuf_in_use;    /* Use the growing buffers? */
 118     GPtrArray *growbuf_blockptr;        /* Pointer to the block pointers */
 119     size_t growbuf_lastindex;   /* Number of bytes in the last page of the
 120                                    growing buffer */
 121     gboolean growbuf_finished;  /* TRUE when all data has been read. */
 122
 123     /* Editor modes */
 124     gboolean hex_mode;          /* Hexview or Hexedit */
 125     gboolean hexedit_mode;      /* Hexedit */
 126     gboolean hexview_in_text;   /* Is the hexview cursor in the text area? */
 127     gboolean text_nroff_mode;   /* Nroff-style highlighting */
 128     gboolean text_wrap_mode;    /* Wrap text lines to fit them on the screen */
 129     gboolean magic_mode;        /* Preprocess the file using external programs */
 130     gboolean hexedit_lownibble; /* Are we editing the last significant nibble? */
 131     gboolean locked;            /* We hold lock on current file */
 132
 133     gboolean utf8;              /* It's multibyte file codeset */
 134
 135     coord_cache_t *coord_cache; /* Cache for mapping offsets to cursor positions */
 136
 137     /* Display information */
 138     screen_dimen dpy_frame_size;        /* Size of the frame surrounding the real viewer */
 139     off_t dpy_start;            /* Offset of the displayed data */
 140     off_t dpy_end;              /* Offset after the displayed data */
 141     off_t dpy_text_column;      /* Number of skipped columns in non-wrap
 142                                  * text mode */
 143     off_t hex_cursor;           /* Hexview cursor position in file */
 144     screen_dimen cursor_col;    /* Cursor column */
 145     screen_dimen cursor_row;    /* Cursor row */
 146     struct hexedit_change_node *change_list;    /* Linked list of changes */
 147     struct area status_area;    /* Where the status line is displayed */
 148     struct area ruler_area;     /* Where the ruler is displayed */
 149     struct area data_area;      /* Where the data is displayed */
 150
 151     int dirty;                  /* Number of skipped updates */
 152     gboolean dpy_bbar_dirty;    /* Does the button bar need to be updated? */
 153
 154     /* Mode variables */
 155     int bytes_per_line;         /* Number of bytes per line in hex mode */
 156
 157     /* Search variables */
 158     off_t search_start;         /* First character to start searching from */
 159     off_t search_end;           /* Length of found string or 0 if none was found */
 160
 161     /* Markers */
 162     int marker;                 /* mark to use */
 163     off_t marks[10];            /* 10 marks: 0..9 */
 164
 165     int move_dir;               /* return value from widget:
 166                                  * 0 do nothing
 167                                  * -1 view previous file
 168                                  * 1 view next file
 169                                  */
 170
 171     off_t update_steps;         /* The number of bytes between percent
 172                                  * increments */
 173     off_t update_activate;      /* Last point where we updated the status */
 174
 175     /* converter for translation of text */
 176     GIConv converter;
 177
 178     /* keymaps */
 179     const global_keymap_t *plain_map;
 180     const global_keymap_t *hex_map;
 181
 182     /* handle of search engine */
 183     mc_search_t *search;
 184     gchar *last_search_string;
 185     struct mcview_nroff_struct *search_nroff_seq;
 186
 187     int search_numNeedSkipChar;
 188
 189     GArray *saved_bookmarks;
 190 } mcview_t;
 191
 192 typedef struct mcview_nroff_struct
 193 {
 194     mcview_t *view;
 195     off_t index;
 196     int char_width;
 197     int current_char;
 198     nroff_type_t type;
 199     nroff_type_t prev_type;
 200 } mcview_nroff_t;
 201
 202 typedef struct mcview_search_options_t
 203 {
 204     mc_search_type_t type;
 205     gboolean case_sens;
 206     gboolean backwards;
 207     gboolean whole_words;
 208     gboolean all_codepages;
 209 } mcview_search_options_t;
 210
 211 /*** global variables defined in .c file *********************************************************/
 212
 213 extern mcview_search_options_t mcview_search_options;
 214
 215 /*** declarations of public functions ************************************************************/
 216
 217 /* actions_cmd.c:  */
 218 cb_ret_t mcview_callback (Widget * w, widget_msg_t msg, int parm);
 219 cb_ret_t mcview_dialog_callback (Dlg_head * h, Widget * sender,
 220                                  dlg_msg_t msg, int parm, void *data);
 221
 222 /* coord_cache.c: */
 223 coord_cache_t *coord_cache_new (void);
 224 void coord_cache_free (coord_cache_t * cache);
 225
 226 #ifdef MC_ENABLE_DEBUGGING_CODE
 227 void mcview_ccache_dump (mcview_t * view);
 228 #endif
 229
 230 void mcview_ccache_lookup (mcview_t * view, coord_cache_entry_t * coord,
 231                            enum ccache_type lookup_what);
 232
 233 /* datasource.c: */
 234 void mcview_set_datasource_none (mcview_t *);
 235 off_t mcview_get_filesize (mcview_t *);
 236 void mcview_update_filesize (mcview_t * view);
 237 char *mcview_get_ptr_file (mcview_t *, off_t);
 238 char *mcview_get_ptr_string (mcview_t *, off_t);
 239 int mcview_get_utf (mcview_t *, off_t, int *, gboolean *);
 240 gboolean mcview_get_byte_string (mcview_t *, off_t, int *);
 241 gboolean mcview_get_byte_none (mcview_t *, off_t, int *);
 242 void mcview_set_byte (mcview_t *, off_t, byte);
 243 void mcview_file_load_data (mcview_t *, off_t);
 244 void mcview_close_datasource (mcview_t *);
 245 void mcview_set_datasource_file (mcview_t *, int, const struct stat *);
 246 gboolean mcview_load_command_output (mcview_t *, const char *);
 247 void mcview_set_datasource_vfs_pipe (mcview_t *, int);
 248 void mcview_set_datasource_string (mcview_t *, const char *);
 249
 250 /* dialog.c: */
 251 gboolean mcview_dialog_search (mcview_t * view);
 252 gboolean mcview_dialog_goto (mcview_t * view, off_t * offset);
 253
 254 /* display.c: */
 255 void mcview_update (mcview_t * view);
 256 void mcview_display (mcview_t * view);
 257 void mcview_compute_areas (mcview_t * view);
 258 void mcview_update_bytes_per_line (mcview_t * view);
 259 void mcview_display_toggle_ruler (mcview_t * view);
 260 void mcview_display_clean (mcview_t * view);
 261 void mcview_display_ruler (mcview_t * view);
 262 void mcview_percent (mcview_t * view, off_t p);
 263
 264 /* growbuf.c: */
 265 void mcview_growbuf_init (mcview_t * view);
 266 void mcview_growbuf_free (mcview_t * view);
 267 off_t mcview_growbuf_filesize (mcview_t * view);
 268 void mcview_growbuf_read_until (mcview_t * view, off_t p);
 269 gboolean mcview_get_byte_growing_buffer (mcview_t * view, off_t p, int *);
 270 char *mcview_get_ptr_growing_buffer (mcview_t * view, off_t p);
 271
 272 /* hex.c: */
 273 void mcview_display_hex (mcview_t * view);
 274 gboolean mcview_hexedit_save_changes (mcview_t * view);
 275 void mcview_toggle_hexedit_mode (mcview_t * view);
 276 void mcview_hexedit_free_change_list (mcview_t * view);
 277 void mcview_enqueue_change (struct hexedit_change_node **, struct hexedit_change_node *);
 278
 279 /* lib.c: */
 280 void mcview_toggle_magic_mode (mcview_t * view);
 281 void mcview_toggle_wrap_mode (mcview_t * view);
 282 void mcview_toggle_nroff_mode (mcview_t * view);
 283 void mcview_toggle_hex_mode (mcview_t * view);
 284 gboolean mcview_ok_to_quit (mcview_t * view);
 285 void mcview_init (mcview_t * view);
 286 void mcview_done (mcview_t * view);
 287 void mcview_select_encoding (mcview_t * view);
 288 void mcview_set_codeset (mcview_t * view);
 289 void mcview_show_error (mcview_t * view, const char *error);
 290 off_t mcview_bol (mcview_t * view, off_t current, off_t limit);
 291 off_t mcview_eol (mcview_t * view, off_t current, off_t limit);
 292 char *mcview_get_title (const Dlg_head * h, size_t len);
 293 gboolean mcview_lock_file (mcview_t * view);
 294 gboolean mcview_unlock_file (mcview_t * view);
 295
 296 /* move.c */
 297 void mcview_move_up (mcview_t *, off_t);
 298 void mcview_move_down (mcview_t *, off_t);
 299 void mcview_move_left (mcview_t *, off_t);
 300 void mcview_move_right (mcview_t *, off_t);
 301 void mcview_scroll_to_cursor (mcview_t *);
 302 void mcview_moveto_top (mcview_t *);
 303 void mcview_moveto_bottom (mcview_t *);
 304 void mcview_moveto_bol (mcview_t *);
 305 void mcview_moveto_eol (mcview_t *);
 306 void mcview_moveto_offset (mcview_t *, off_t);
 307 void mcview_moveto (mcview_t *, off_t, off_t);
 308 void mcview_coord_to_offset (mcview_t *, off_t *, off_t, off_t);
 309 void mcview_offset_to_coord (mcview_t *, off_t *, off_t *, off_t);
 310 void mcview_place_cursor (mcview_t *);
 311 void mcview_moveto_match (mcview_t *);
 312
 313 /* nroff.c: */
 314 void mcview_display_nroff (mcview_t * view);
 315 int mcview__get_nroff_real_len (mcview_t * view, off_t, off_t p);
 316
 317 mcview_nroff_t *mcview_nroff_seq_new_num (mcview_t * view, off_t p);
 318 mcview_nroff_t *mcview_nroff_seq_new (mcview_t * view);
 319 void mcview_nroff_seq_free (mcview_nroff_t **);
 320 nroff_type_t mcview_nroff_seq_info (mcview_nroff_t *);
 321 int mcview_nroff_seq_next (mcview_nroff_t *);
 322 int mcview_nroff_seq_prev (mcview_nroff_t *);
 323
 324
 325 /* plain.c: */
 326 void mcview_display_text (mcview_t *);
 327
 328 /* search.c: */
 329 int mcview_search_cmd_callback (const void *user_data, gsize char_offset);
 330 int mcview_search_update_cmd_callback (const void *, gsize);
 331 void mcview_do_search (mcview_t * view);
 332
 333 /*** inline functions ****************************************************************************/
 334
 335 #include "inlines.h"
 336
 337 #endif /* MC__VIEWER_INTERNAL_H */