src/lyxfr1.C

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