src/editor/editwidget.c

   1 /* editor initialisation and callback handler.
   2
   3    Copyright (C) 1996, 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006,
   4    2007 Free Software Foundation, Inc.
   5
   6    Authors: 1996, 1997 Paul Sheer
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.
  22  */
  23
  24 /** \file
  25  *  \brief Source: editor initialisation and callback handler
  26  *  \author Paul Sheer
  27  *  \date 1996, 1997
  28  */
  29
  30 #include <config.h>
  31
  32 #include <stdio.h>
  33 #include <stdarg.h>
  34 #include <sys/types.h>
  35 #include <unistd.h>
  36 #include <string.h>
  37 #include <ctype.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <stdlib.h>
  41
  42 #include "lib/global.h"
  43
  44 #include "lib/tty/tty.h"        /* LINES, COLS */
  45 #include "lib/tty/key.h"        /* is_idle() */
  46
  47 #include "edit-impl.h"
  48 #include "edit-widget.h"
  49
  50 #include "src/dialog.h"
  51 #include "src/widget.h"         /* ButtonBar */
  52 #include "src/menu.h"           /* menubar_new() */
  53 #include "src/cmddef.h"
  54
  55 int column_highlighting = 0;
  56
  57 static cb_ret_t edit_callback (Widget *, widget_msg_t msg, int parm);
  58
  59 static char *
  60 edit_get_shortcut (unsigned long command)
  61 {
  62     const char *ext_map;
  63     const char *shortcut = NULL;
  64
  65     shortcut = lookup_keymap_shortcut (editor_map, command);
  66     if (shortcut != NULL)
  67         return g_strdup (shortcut);
  68
  69     ext_map = lookup_keymap_shortcut (editor_map, CK_Ext_Mode);
  70     if (ext_map != NULL)
  71         shortcut = lookup_keymap_shortcut (editor_x_map, command);
  72     if (shortcut != NULL)
  73         return g_strdup_printf ("%s %s", ext_map, shortcut);
  74
  75     return NULL;
  76 }
  77
  78 static int
  79 edit_event (Gpm_Event * event, void *data)
  80 {
  81     WEdit *edit = (WEdit *) data;
  82
  83     /* Unknown event type */
  84     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  85         return MOU_NORMAL;
  86
  87     /* rest of the upper frame, the menu is invisible - call menu */
  88     if ((event->type & GPM_DOWN) && (event->y == 1))
  89     {
  90         WMenuBar *menubar;
  91
  92         menubar = find_menubar (edit->widget.parent);
  93
  94         return menubar->widget.mouse (event, menubar);
  95     }
  96
  97     edit_update_curs_row (edit);
  98     edit_update_curs_col (edit);
  99
 100     /* Outside editor window */
 101     if (event->y <= 1 || event->x <= 0
 102         || event->x > edit->num_widget_columns || event->y > edit->num_widget_lines + 1)
 103         return MOU_NORMAL;
 104
 105     /* Wheel events */
 106     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN))
 107     {
 108         edit_move_up (edit, 2, 1);
 109         goto update;
 110     }
 111     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN))
 112     {
 113         edit_move_down (edit, 2, 1);
 114         goto update;
 115     }
 116
 117     /* A lone up mustn't do anything */
 118     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
 119         return MOU_NORMAL;
 120
 121     if (event->type & (GPM_DOWN | GPM_UP))
 122         edit_push_key_press (edit);
 123
 124     if (option_cursor_beyond_eol)
 125     {
 126         long line_len = edit_move_forward3 (edit, edit_bol (edit, edit->curs1), 0,
 127                                             edit_eol (edit, edit->curs1));
 128
 129         if (event->x > line_len)
 130         {
 131             edit->over_col = event->x - line_len - edit->start_col - option_line_state_width - 1;
 132             edit->prev_col = line_len;
 133         }
 134         else
 135         {
 136             edit->over_col = 0;
 137             edit->prev_col = event->x - option_line_state_width - edit->start_col - 1;
 138         }
 139     }
 140     else
 141     {
 142         edit->prev_col = event->x - edit->start_col - option_line_state_width - 1;
 143     }
 144
 145     if (--event->y > (edit->curs_row + 1))
 146         edit_move_down (edit, event->y - (edit->curs_row + 1), 0);
 147     else if (event->y < (edit->curs_row + 1))
 148         edit_move_up (edit, (edit->curs_row + 1) - event->y, 0);
 149     else
 150         edit_move_to_prev_col (edit, edit_bol (edit, edit->curs1));
 151
 152     if (event->type & GPM_DOWN)
 153     {
 154         edit_mark_cmd (edit, 1);        /* reset */
 155         edit->highlight = 0;
 156     }
 157
 158     if (!(event->type & GPM_DRAG))
 159         edit_mark_cmd (edit, 0);
 160
 161   update:
 162     edit_find_bracket (edit);
 163     edit->force |= REDRAW_COMPLETELY;
 164     edit_update_curs_row (edit);
 165     edit_update_curs_col (edit);
 166     edit_update_screen (edit);
 167
 168     return MOU_NORMAL;
 169 }
 170
 171 static cb_ret_t
 172 edit_command_execute (WEdit * edit, unsigned long command)
 173 {
 174     if (command == CK_Menu)
 175         edit_menu_cmd (edit);
 176     else
 177     {
 178         edit_execute_key_command (edit, command, -1);
 179         edit_update_screen (edit);
 180     }
 181     return MSG_HANDLED;
 182 }
 183
 184 static inline void
 185 edit_set_buttonbar (WEdit * edit, WButtonBar * bb)
 186 {
 187     buttonbar_set_label (bb, 1, Q_ ("ButtonBar|Help"), editor_map, (Widget *) edit);
 188     buttonbar_set_label (bb, 2, Q_ ("ButtonBar|Save"), editor_map, (Widget *) edit);
 189     buttonbar_set_label (bb, 3, Q_ ("ButtonBar|Mark"), editor_map, (Widget *) edit);
 190     buttonbar_set_label (bb, 4, Q_ ("ButtonBar|Replac"), editor_map, (Widget *) edit);
 191     buttonbar_set_label (bb, 5, Q_ ("ButtonBar|Copy"), editor_map, (Widget *) edit);
 192     buttonbar_set_label (bb, 6, Q_ ("ButtonBar|Move"), editor_map, (Widget *) edit);
 193     buttonbar_set_label (bb, 7, Q_ ("ButtonBar|Search"), editor_map, (Widget *) edit);
 194     buttonbar_set_label (bb, 8, Q_ ("ButtonBar|Delete"), editor_map, (Widget *) edit);
 195     buttonbar_set_label (bb, 9, Q_ ("ButtonBar|PullDn"), editor_map, (Widget *) edit);
 196     buttonbar_set_label (bb, 10, Q_ ("ButtonBar|Quit"), editor_map, (Widget *) edit);
 197 }
 198
 199 /* Callback for the edit dialog */
 200 static cb_ret_t
 201 edit_dialog_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data)
 202 {
 203     WEdit *edit;
 204     WMenuBar *menubar;
 205     WButtonBar *buttonbar;
 206
 207     edit = (WEdit *) find_widget_type (h, edit_callback);
 208     menubar = find_menubar (h);
 209     buttonbar = find_buttonbar (h);
 210
 211     switch (msg)
 212     {
 213     case DLG_INIT:
 214         edit_set_buttonbar (edit, buttonbar);
 215         return MSG_HANDLED;
 216
 217     case DLG_RESIZE:
 218         widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 219         widget_set_size (&buttonbar->widget, LINES - 1, 0, 1, COLS);
 220         widget_set_size (&menubar->widget, 0, 0, 1, COLS);
 221         menubar_arrange (menubar);
 222         return MSG_HANDLED;
 223
 224     case DLG_ACTION:
 225         if (sender == (Widget *) menubar)
 226             return send_message ((Widget *) edit, WIDGET_COMMAND, parm);
 227         if (sender == (Widget *) buttonbar)
 228             return send_message ((Widget *) edit, WIDGET_COMMAND, parm);
 229         return MSG_HANDLED;
 230
 231     case DLG_VALIDATE:
 232         if (!edit_ok_to_exit (edit))
 233             h->running = 1;
 234         return MSG_HANDLED;
 235
 236     default:
 237         return default_dlg_callback (h, sender, msg, parm, data);
 238     }
 239 }
 240
 241 int
 242 edit_file (const char *_file, int line)
 243 {
 244     static gboolean made_directory = FALSE;
 245     Dlg_head *edit_dlg;
 246     WEdit *wedit;
 247     WMenuBar *menubar;
 248
 249     if (!made_directory)
 250     {
 251         char *dir = concat_dir_and_file (home_dir, EDIT_DIR);
 252         made_directory = (mkdir (dir, 0700) != -1 || errno == EEXIST);
 253         g_free (dir);
 254     }
 255
 256     wedit = edit_init (NULL, LINES - 2, COLS, _file, line);
 257
 258     if (wedit == NULL)
 259         return 0;
 260
 261     /* Create a new dialog and add it widgets to it */
 262     edit_dlg =
 263         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 264                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 265
 266     edit_dlg->get_shortcut = edit_get_shortcut;
 267     menubar = menubar_new (0, 0, COLS, NULL);
 268     add_widget (edit_dlg, menubar);
 269     edit_init_menu (menubar);
 270
 271     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS, edit_callback, edit_event);
 272     widget_want_cursor (wedit->widget, 1);
 273
 274     add_widget (edit_dlg, wedit);
 275
 276     add_widget (edit_dlg, buttonbar_new (TRUE));
 277
 278     run_dlg (edit_dlg);
 279
 280     destroy_dlg (edit_dlg);
 281
 282     return 1;
 283 }
 284
 285 const char *
 286 edit_get_file_name (const WEdit * edit)
 287 {
 288     return edit->filename;
 289 }
 290
 291 void
 292 edit_update_screen (WEdit * e)
 293 {
 294     edit_scroll_screen_over_cursor (e);
 295
 296     edit_update_curs_col (e);
 297     edit_status (e);
 298
 299     /* pop all events for this window for internal handling */
 300     if (!is_idle ())
 301         e->force |= REDRAW_PAGE;
 302     else
 303     {
 304         if (e->force & REDRAW_COMPLETELY)
 305             e->force |= REDRAW_PAGE;
 306         edit_render_keypress (e);
 307     }
 308 }
 309
 310 static cb_ret_t
 311 edit_callback (Widget * w, widget_msg_t msg, int parm)
 312 {
 313     WEdit *e = (WEdit *) w;
 314
 315     switch (msg)
 316     {
 317     case WIDGET_DRAW:
 318         e->force |= REDRAW_COMPLETELY;
 319         e->num_widget_lines = LINES - 2;
 320         e->num_widget_columns = COLS;
 321         /* fallthrough */
 322
 323     case WIDGET_FOCUS:
 324         edit_update_screen (e);
 325         return MSG_HANDLED;
 326
 327     case WIDGET_KEY:
 328         {
 329             int cmd, ch;
 330             cb_ret_t ret = MSG_NOT_HANDLED;
 331
 332             /* The user may override the access-keys for the menu bar. */
 333             if (edit_translate_key (e, parm, &cmd, &ch))
 334             {
 335                 edit_execute_key_command (e, cmd, ch);
 336                 edit_update_screen (e);
 337                 ret = MSG_HANDLED;
 338             }
 339             else if (edit_drop_hotkey_menu (e, parm))
 340                 ret = MSG_HANDLED;
 341
 342             return ret;
 343         }
 344
 345     case WIDGET_COMMAND:
 346         /* command from menubar or buttonbar */
 347         return edit_command_execute (e, parm);
 348
 349     case WIDGET_CURSOR:
 350         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 351                      e->curs_col + e->start_col + e->over_col +
 352                      EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width);
 353         return MSG_HANDLED;
 354
 355     case WIDGET_DESTROY:
 356         edit_clean (e);
 357         return MSG_HANDLED;
 358
 359     default:
 360         return default_proc (msg, parm);
 361     }
 362 }