src/lyxfr1.C

   1 /* This file is part of
   2 * ======================================================
   3 *
   4 *           LyX, The Document Processor
   5 *
   6 *           Copyright (C) 1995 Matthias Ettrich,
   7 *           Copyright (C) 1995-1998 The LyX Team.
   8 *
   9 *======================================================*/
  10
  11 #include <config.h>
  12
  13 #include <ctype.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16
  17 #ifdef __GNUG__
  18 #pragma implementation
  19 #endif
  20
  21 #include "LString.h"
  22 #include "lyx_main.h"
  23 #include FORMS_H_LOCATION
  24 #include "form1.h"
  25 #include "lyxfr0.h"
  26 #include "lyxfr1.h"
  27 #include "lyxfunc.h"
  28 #include "lyxscreen.h"
  29 #include "error.h"
  30 #include "lyxtext.h"
  31 #include "gettext.h"
  32 #include "LyXView.h"
  33 #include "lyx_gui_misc.h"
  34 #include "minibuffer.h"
  35
  36 extern BufferView *current_view; // called too many times in this file...
  37 extern MiniBuffer *minibuffer;
  38
  39 // Maximum length copied from the current selection to the search string
  40 const int LYXSEARCH_MAXLEN =  128;
  41
  42 // function prototypes
  43
  44 bool IsLetterCharOrDigit(char ch);
  45
  46 // If nothing selected, select the word at the cursor.
  47 // Returns the current selection
  48 // Note: this function should be in LyXText!
  49 string const GetSelectionOrWordAtCursor(LyXText *lt);
  50
  51 // Returns the current selection. If nothing is selected or if the selection
  52 // spans 2 paragraphs, an empty string is returned.
  53 string const GetCurrentSelectionAsString(LyXText *lt);
  54
  55 // This is a copy of SetSelectionOverString from text.C
  56 // It does the same, but uses only the length as a parameter
  57 void SetSelectionOverLenChars(LyXText *lt, int len);
  58
  59 //-------------------------------------------------------------
  60
  61 bool IsLetterCharOrDigit(char ch)
  62 {
  63         return IsLetterChar(ch) || isdigit(ch);
  64 }
  65
  66
  67 // Returns the current selection. If nothing is selected or if the selection
  68 // spans 2 paragraphs, an empty string is returned.
  69 string const GetCurrentSelectionAsString(LyXText *lt)
  70 {
  71         LyXParagraph    *par;
  72         int             pos;
  73         int             endpos;
  74         int             i;
  75         char            sz[LYXSEARCH_MAXLEN];
  76         char            ch;
  77         bool            fPrevIsSpace;
  78
  79         sz[0] = 0;
  80         par = lt->cursor.par;
  81         if (lt->selection && (lt->sel_cursor.par == par)) {
  82                 // (selected) and (begin/end in same paragraph)
  83                 pos = lt->sel_start_cursor.pos;
  84                 endpos = lt->sel_end_cursor.pos;
  85                 i = 0;
  86                 fPrevIsSpace = false;
  87                 while ((i < LYXSEARCH_MAXLEN-2) &&
  88                         (pos < par->Last()) && (pos < endpos)) {
  89                         ch = par->GetChar(pos);
  90
  91                         //HB??: Maybe (ch <= ' ')
  92                         if ((ch == ' ') || ((unsigned char)ch <= LYX_META_INSET)) {
  93                                 // consecutive spaces --> 1 space char
  94                                 if (fPrevIsSpace) {
  95                                         pos++;          // Next text pos
  96                                         continue;       // same search pos
  97                                 }
  98                                 sz[i] = ' ';
  99                                 fPrevIsSpace = true;
 100                         } else {
 101                                 sz[i] = ch;
 102                                 fPrevIsSpace = false;
 103                         }
 104                         pos++;
 105                         i++;
 106                 }
 107                 sz[i] = 0;
 108         }
 109         return string(sz);
 110 }
 111
 112
 113 // If nothing selected, select the word at the cursor.
 114 // Returns the current selection
 115 string const GetSelectionOrWordAtCursor(LyXText *lt)
 116 {
 117         lt->SelectWordWhenUnderCursor();
 118         return GetCurrentSelectionAsString(lt);
 119 }
 120
 121
 122 // This is a copy of SetSelectionOverString from text.C
 123 // It does the same, but uses only the length as a parameter
 124 void SetSelectionOverLenChars(LyXText *lt, int len)
 125 {
 126         lt->sel_cursor = lt->cursor;
 127         int i;
 128         for (i=0; i < len; i++)
 129                 lt->CursorRight();
 130         lt->SetSelection();
 131 }
 132
 133
 134 //------------------------------
 135
 136 void LyXFindReplace1::StartSearch()
 137 {
 138         LyXFindReplace0::StartSearch();
 139         SetReplaceEnabled(!current_view->currentBuffer()->isReadonly());
 140         searchForward = true;
 141         if (lsSearch.empty())
 142                 SetSearchString(GetSelectionOrWordAtCursor(current_view->currentBuffer()->text));
 143 }
 144
 145
 146 // TODO?: the user can insert multiple spaces with this routine (1999-01-11, dnaber)
 147 void LyXFindReplace1::SearchReplaceCB()
 148 {
 149         LyXText         *ltCur;
 150
 151         if (!current_view->getScreen())
 152                 return;
 153         if (current_view->currentBuffer()->isReadonly())
 154                 return;
 155
 156         // CutSelection cannot cut a single space, so we have to stop
 157         // in order to avoid endless loop :-(
 158         ReInitFromForm();
 159         if (SearchString().length() == 0 || (SearchString().length() == 1
 160                                              && SearchString()[0] == ' ') ) {
 161                 WriteAlert(_("Sorry!"), _("You cannot replace a single space, "
 162                                           "nor an empty character."));
 163                 return;
 164         }
 165
 166         string const replacestring = ReplaceString();
 167
 168         current_view->getScreen()->HideCursor();
 169         current_view->currentBuffer()->update(-2);
 170
 171         ltCur = current_view->currentBuffer()->text;
 172         if (ltCur->selection) {
 173                 // clear the selection (if there is any)
 174                 current_view->getScreen()->ToggleSelection(false);
 175                 current_view->currentBuffer()->text->
 176                         ReplaceSelectionWithString(replacestring.c_str());
 177                 current_view->currentBuffer()->text->
 178                         SetSelectionOverString(replacestring.c_str());
 179                 current_view->currentBuffer()->update(1);
 180         }
 181
 182         // jump to next match:
 183         SearchCB( searchForward );
 184 }
 185
 186
 187 // replaces all occurences of a string (1999-01-15, dnaber@mini.gt.owl.de)
 188 void LyXFindReplace1::SearchReplaceAllCB()
 189 {
 190         LyXText         *ltCur;
 191
 192         if (!current_view->getScreen())
 193                 return;
 194         if (current_view->currentBuffer()->isReadonly())
 195                 return;
 196
 197         // CutSelection cannot cut a single space, so we have to stop
 198         // in order to avoid endless loop :-(
 199         ReInitFromForm();
 200         if (SearchString().length() == 0 || (SearchString().length() == 1
 201                                              && SearchString()[0] == ' ') ) {
 202                 WriteAlert(_("Sorry!"), _("You cannot replace a single space, "
 203                                           "nor an empty character."));
 204                return;
 205        }
 206
 207         string const replacestring = ReplaceString();
 208
 209         current_view->getScreen()->HideCursor();
 210
 211         // start at top
 212         current_view->currentBuffer()->text->ClearSelection();
 213         current_view->currentBuffer()->text->CursorTop();
 214
 215         int replace_count = 0;
 216         do {
 217                 ltCur = current_view->currentBuffer()->text;
 218                 if (ltCur->selection) {
 219                         current_view->currentBuffer()->update(-2);
 220                         current_view->getScreen()->ToggleSelection(false);
 221                         current_view->currentBuffer()->text->
 222                                 ReplaceSelectionWithString(replacestring.c_str());
 223                         current_view->currentBuffer()->text->
 224                                 SetSelectionOverString(replacestring.c_str());
 225                         current_view->currentBuffer()->update(1);
 226                         replace_count++;
 227                 }
 228         } while( SearchCB(true) );
 229
 230         if( replace_count == 0 ) {
 231                 LyXBell();
 232                 minibuffer->Set(_("String not found!"));
 233         } else {
 234                 if( replace_count == 1 ) {
 235                         minibuffer->Set(_("1 string has been replaced."));
 236                 } else {
 237                         string str;
 238                         str += replace_count;
 239                         str += _(" strings have been replaced.");
 240                         minibuffer->Set(str);
 241                 }
 242         }
 243 }
 244
 245
 246 bool LyXFindReplace1::SearchCB(bool fForward)
 247 {
 248         LyXText         *ltCur;
 249         bool result;
 250
 251         // store search direction
 252         searchForward = fForward;
 253
 254         if (!current_view->getScreen())
 255                 return(false);
 256
 257         current_view->getScreen()->HideCursor();
 258         current_view->currentBuffer()->update(-2);
 259         ltCur = current_view->currentBuffer()->text;
 260         if (ltCur->selection)
 261                 ltCur->cursor = fForward ? ltCur->sel_end_cursor :
 262                                                  ltCur->sel_start_cursor;
 263
 264         ReInitFromForm();
 265         iLenSelected = SearchString().length();
 266
 267         if (!ValidSearchData() ||
 268             (fForward ? SearchForward(ltCur) : SearchBackward(ltCur))) {
 269                 current_view->currentBuffer()->update(-2);
 270
 271                 // clear the selection (if there is any)
 272                 current_view->getScreen()->ToggleSelection();
 273                 current_view->currentBuffer()->text->ClearSelection();
 274
 275                 // set the new selection
 276                 SetSelectionOverLenChars(current_view->currentBuffer()->text, iLenSelected);
 277                 current_view->getScreen()->ToggleSelection(false);
 278                 minibuffer->Set(_("Found."));
 279                 result = true;
 280         } else {
 281                 LyXBell();
 282                 minibuffer->Set(_("String not found!"));
 283                 result = false;
 284         }
 285
 286         if (current_view->getWorkArea()->focus)
 287                 current_view->getScreen()->ShowCursor();
 288
 289         return(result);
 290 }
 291
 292
 293 // if the string can be found: return true and set the cursor to
 294 // the new position
 295 // (was: LyXText::SearchForward(char const* string) in text2.C )
 296 bool LyXFindReplace1::SearchForward(LyXText *lt)
 297 {
 298         LyXParagraph *par;
 299         int pos;
 300
 301         par = lt->cursor.par;
 302         pos = lt->cursor.pos;
 303
 304         while (par && !IsSearchStringInText(par,pos)) {
 305                 if (pos<par->Last()-1)
 306                         pos++;
 307                 else {
 308                         pos = 0;
 309                         par = par->Next();
 310                 }
 311         }
 312         if (par) {
 313                 lt->SetCursor(par,pos);
 314                 return true;
 315         } else
 316                 return false;
 317 }
 318
 319
 320 // if the string can be found: return true and set the cursor to
 321 // the new position
 322 // (was: LyXText::SearchBackward(char const* string) in text2.C )
 323 bool LyXFindReplace1::SearchBackward(LyXText *lt)
 324 {
 325         LyXParagraph *par = lt->cursor.par;
 326         int pos = lt->cursor.pos;
 327
 328         do {
 329                 if (pos>0)
 330                         pos--;
 331                 else {
 332                         // We skip empty paragraphs (Asger)
 333                         do {
 334                                 par = par->Previous();
 335                                 if (par)
 336                                         pos = par->Last()-1;
 337                         } while (par && pos<0);
 338                 }
 339         } while (par && !IsSearchStringInText(par,pos));
 340
 341         if (par) {
 342                 lt->SetCursor(par,pos);
 343                 return true;
 344         } else
 345                 return false;
 346 }
 347
 348
 349 /* Compares 2 char values.
 350 return value is
 351     > 0 if chSearch > ch2
 352     = 0 if chSearch == ch2
 353     < 0 if chSearch < ch2
 354 */
 355 int LyXFindReplace1::CompareChars(char chSearch, char chText)
 356 {
 357         if (CaseSensitive())
 358                 return (chSearch - chText);
 359         return (toupper((unsigned char) chSearch) - toupper((unsigned char) chText));
 360 }
 361
 362
 363 // returns true if the search string is at the specified position
 364 // (Copied from the original "LyXText::IsStringInText" in text2.C )
 365 bool LyXFindReplace1::IsSearchStringInText(LyXParagraph *par, int pos)
 366 {
 367         char            chSrch = 0;
 368         char            chText;
 369         bool            fPrevIsSpace;
 370         int             iText;
 371         string::size_type iSrch;
 372
 373         if (!par)
 374                 return false;
 375
 376         fPrevIsSpace = false;
 377         iText = 0; iSrch = 0;
 378         while (pos+iText < par->Last() &&
 379                iSrch < SearchString().length()) {
 380                 chSrch = SearchString()[iSrch];
 381                 chText = par->GetChar(pos+iText);
 382 // Why was this code there ??? Insets are *not* spaces!
 383 // It seems that there is some code here to handle multiple spaces. I
 384 // wonder why this is useful...  (JMarc)
 385 //              if ((chText == ' ') ||
 386 //                  ((unsigned char)chText <= LYX_META_INSET))
 387                 if (chText == ' ') {
 388                         if (fPrevIsSpace) {
 389                                 iText++;  // next Text pos
 390                                 continue; // same search pos
 391                         }
 392 //                      chText = ' ';
 393                         fPrevIsSpace = true;
 394                 } else
 395                         fPrevIsSpace = false;
 396                 if (CompareChars(chSrch, chText) != 0)
 397                         break;
 398
 399                 iSrch++;
 400                 iText++;
 401         }
 402
 403         if (iSrch < SearchString().length())
 404                 return false;
 405
 406         if (!MatchWord()
 407             || ((pos <= 0 || !IsLetterCharOrDigit(par->GetChar(pos-1)))
 408                 && (pos+iText >= par->Last()
 409                     || !IsLetterCharOrDigit(par->GetChar(pos + iText))))) {
 410                 iLenSelected = iText;
 411                 return true;
 412         }
 413
 414         return false;
 415 }