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 #include "src/keybind.h"
  55
  56 int column_highlighting = 0;
  57
  58 static cb_ret_t edit_callback (Widget *, widget_msg_t msg, int parm);
  59
  60 static char *
  61 edit_get_shortcut (unsigned long command)
  62 {
  63     const char *ext_map;
  64     const char *shortcut = NULL;
  65
  66     shortcut = lookup_keymap_shortcut (editor_map, command);
  67     if (shortcut != NULL)
  68         return g_strdup (shortcut);
  69
  70     ext_map = lookup_keymap_shortcut (editor_map, CK_Ext_Mode);
  71     if (ext_map != NULL)
  72         shortcut = lookup_keymap_shortcut (editor_x_map, command);
  73     if (shortcut != NULL)
  74         return g_strdup_printf ("%s %s", ext_map, shortcut);
  75
  76     return NULL;
  77 }
  78
  79 static int
  80 edit_event (Gpm_Event * event, void *data)
  81 {
  82     WEdit *edit = (WEdit *) data;
  83
  84     /* Unknown event type */
  85     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  86         return MOU_NORMAL;
  87
  88     /* rest of the upper frame, the menu is invisible - call menu */
  89     if ((event->type & GPM_DOWN) && (event->y == 1))
  90     {
  91         WMenuBar *menubar;
  92
  93         menubar = find_menubar (edit->widget.parent);
  94
  95         return menubar->widget.mouse (event, menubar);
  96     }
  97
  98     edit_update_curs_row (edit);
  99     edit_update_curs_col (edit);
 100
 101     /* Outside editor window */
 102     if (event->y <= 1 || event->x <= 0
 103         || event->x > edit->num_widget_columns || event->y > edit->num_widget_lines + 1)
 104         return MOU_NORMAL;
 105
 106     /* Wheel events */
 107     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN))
 108     {
 109         edit_move_up (edit, 2, 1);
 110         goto update;
 111     }
 112     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN))
 113     {
 114         edit_move_down (edit, 2, 1);
 115         goto update;
 116     }
 117
 118     /* A lone up mustn't do anything */
 119     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
 120         return MOU_NORMAL;
 121
 122     if (event->type & (GPM_DOWN | GPM_UP))
 123         edit_push_key_press (edit);
 124
 125     if (option_cursor_beyond_eol)
 126     {
 127         long line_len = edit_move_forward3 (edit, edit_bol (edit, edit->curs1), 0,
 128                                             edit_eol (edit, edit->curs1));
 129
 130         if (event->x > line_len)
 131         {
 132             edit->over_col = event->x - line_len - edit->start_col - option_line_state_width - 1;
 133             edit->prev_col = line_len;
 134         }
 135         else
 136         {
 137             edit->over_col = 0;
 138             edit->prev_col = event->x - option_line_state_width - edit->start_col - 1;
 139         }
 140     }
 141     else
 142     {
 143         edit->prev_col = event->x - edit->start_col - option_line_state_width - 1;
 144     }
 145
 146     if (--event->y > (edit->curs_row + 1))
 147         edit_move_down (edit, event->y - (edit->curs_row + 1), 0);
 148     else if (event->y < (edit->curs_row + 1))
 149         edit_move_up (edit, (edit->curs_row + 1) - event->y, 0);
 150     else
 151         edit_move_to_prev_col (edit, edit_bol (edit, edit->curs1));
 152
 153     if (event->type & GPM_DOWN)
 154     {
 155         edit_mark_cmd (edit, 1);        /* reset */
 156         edit->highlight = 0;
 157     }
 158
 159     if (!(event->type & GPM_DRAG))
 160         edit_mark_cmd (edit, 0);
 161
 162   update:
 163     edit_find_bracket (edit);
 164     edit->force |= REDRAW_COMPLETELY;
 165     edit_update_curs_row (edit);
 166     edit_update_curs_col (edit);
 167     edit_update_screen (edit);
 168
 169     return MOU_NORMAL;
 170 }
 171
 172 static cb_ret_t
 173 edit_command_execute (WEdit * edit, unsigned long command)
 174 {
 175     if (command == CK_Menu)
 176         edit_menu_cmd (edit);
 177     else
 178     {
 179         edit_execute_key_command (edit, command, -1);
 180         edit_update_screen (edit);
 181     }
 182     return MSG_HANDLED;
 183 }
 184
 185 static inline void
 186 edit_set_buttonbar (WEdit * edit, WButtonBar * bb)
 187 {
 188     buttonbar_set_label (bb, 1, Q_ ("ButtonBar|Help"), editor_map, (Widget *) edit);
 189     buttonbar_set_label (bb, 2, Q_ ("ButtonBar|Save"), editor_map, (Widget *) edit);
 190     buttonbar_set_label (bb, 3, Q_ ("ButtonBar|Mark"), editor_map, (Widget *) edit);
 191     buttonbar_set_label (bb, 4, Q_ ("ButtonBar|Replac"), editor_map, (Widget *) edit);
 192     buttonbar_set_label (bb, 5, Q_ ("ButtonBar|Copy"), editor_map, (Widget *) edit);
 193     buttonbar_set_label (bb, 6, Q_ ("ButtonBar|Move"), editor_map, (Widget *) edit);
 194     buttonbar_set_label (bb, 7, Q_ ("ButtonBar|Search"), editor_map, (Widget *) edit);
 195     buttonbar_set_label (bb, 8, Q_ ("ButtonBar|Delete"), editor_map, (Widget *) edit);
 196     buttonbar_set_label (bb, 9, Q_ ("ButtonBar|PullDn"), editor_map, (Widget *) edit);
 197     buttonbar_set_label (bb, 10, Q_ ("ButtonBar|Quit"), editor_map, (Widget *) edit);
 198 }
 199
 200 /* Callback for the edit dialog */
 201 static cb_ret_t
 202 edit_dialog_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data)
 203 {
 204     WEdit *edit;
 205     WMenuBar *menubar;
 206     WButtonBar *buttonbar;
 207
 208     edit = (WEdit *) find_widget_type (h, edit_callback);
 209     menubar = find_menubar (h);
 210     buttonbar = find_buttonbar (h);
 211
 212     switch (msg)
 213     {
 214     case DLG_INIT:
 215         edit_set_buttonbar (edit, buttonbar);
 216         return MSG_HANDLED;
 217
 218     case DLG_RESIZE:
 219         widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 220         widget_set_size (&buttonbar->widget, LINES - 1, 0, 1, COLS);
 221         widget_set_size (&menubar->widget, 0, 0, 1, COLS);
 222         menubar_arrange (menubar);
 223         return MSG_HANDLED;
 224
 225     case DLG_ACTION:
 226         if (sender == (Widget *) menubar)
 227             return send_message ((Widget *) edit, WIDGET_COMMAND, parm);
 228         if (sender == (Widget *) buttonbar)
 229             return send_message ((Widget *) edit, WIDGET_COMMAND, parm);
 230         return MSG_HANDLED;
 231
 232     case DLG_VALIDATE:
 233         if (!edit_ok_to_exit (edit))
 234             h->running = 1;
 235         return MSG_HANDLED;
 236
 237     default:
 238         return default_dlg_callback (h, sender, msg, parm, data);
 239     }
 240 }
 241
 242 int
 243 edit_file (const char *_file, int line)
 244 {
 245     static gboolean made_directory = FALSE;
 246     Dlg_head *edit_dlg;
 247     WEdit *wedit;
 248     WMenuBar *menubar;
 249
 250     if (!made_directory)
 251     {
 252         char *dir = concat_dir_and_file (home_dir, EDIT_DIR);
 253         made_directory = (mkdir (dir, 0700) != -1 || errno == EEXIST);
 254         g_free (dir);
 255     }
 256
 257     wedit = edit_init (NULL, LINES - 2, COLS, _file, line);
 258
 259     if (wedit == NULL)
 260         return 0;
 261
 262     /* Create a new dialog and add it widgets to it */
 263     edit_dlg =
 264         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 265                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 266
 267     edit_dlg->get_shortcut = edit_get_shortcut;
 268     menubar = menubar_new (0, 0, COLS, NULL);
 269     add_widget (edit_dlg, menubar);
 270     edit_init_menu (menubar);
 271
 272     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS, edit_callback, edit_event);
 273     widget_want_cursor (wedit->widget, 1);
 274
 275     add_widget (edit_dlg, wedit);
 276
 277     add_widget (edit_dlg, buttonbar_new (TRUE));
 278
 279     run_dlg (edit_dlg);
 280
 281     destroy_dlg (edit_dlg);
 282
 283     return 1;
 284 }
 285
 286 const char *
 287 edit_get_file_name (const WEdit * edit)
 288 {
 289     return edit->filename;
 290 }
 291
 292 void
 293 edit_update_screen (WEdit * e)
 294 {
 295     edit_scroll_screen_over_cursor (e);
 296
 297     edit_update_curs_col (e);
 298     edit_status (e);
 299
 300     /* pop all events for this window for internal handling */
 301     if (!is_idle ())
 302         e->force |= REDRAW_PAGE;
 303     else
 304     {
 305         if (e->force & REDRAW_COMPLETELY)
 306             e->force |= REDRAW_PAGE;
 307         edit_render_keypress (e);
 308     }
 309 }
 310
 311 static cb_ret_t
 312 edit_callback (Widget * w, widget_msg_t msg, int parm)
 313 {
 314     WEdit *e = (WEdit *) w;
 315
 316     switch (msg)
 317     {
 318     case WIDGET_DRAW:
 319         e->force |= REDRAW_COMPLETELY;
 320         e->num_widget_lines = LINES - 2;
 321         e->num_widget_columns = COLS;
 322         /* fallthrough */
 323
 324     case WIDGET_FOCUS:
 325         edit_update_screen (e);
 326         return MSG_HANDLED;
 327
 328     case WIDGET_KEY:
 329         {
 330             int cmd, ch;
 331             cb_ret_t ret = MSG_NOT_HANDLED;
 332
 333             /* The user may override the access-keys for the menu bar. */
 334             if (edit_translate_key (e, parm, &cmd, &ch))
 335             {
 336                 edit_execute_key_command (e, cmd, ch);
 337                 edit_update_screen (e);
 338                 ret = MSG_HANDLED;
 339             }
 340             else if (edit_drop_hotkey_menu (e, parm))
 341                 ret = MSG_HANDLED;
 342
 343             return ret;
 344         }
 345
 346     case WIDGET_COMMAND:
 347         /* command from menubar or buttonbar */
 348         return edit_command_execute (e, parm);
 349
 350     case WIDGET_CURSOR:
 351         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 352                      e->curs_col + e->start_col + e->over_col +
 353                      EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width);
 354         return MSG_HANDLED;
 355
 356     case WIDGET_DESTROY:
 357         edit_clean (e);
 358         return MSG_HANDLED;
 359
 360     default:
 361         return default_proc (msg, parm);
 362     }
 363 }