src/BufferView.C

   1 // -*- C++ -*-
   2 /* This file is part of
   3  * ======================================================
   4  *
   5  *           LyX, The Document Processor
   6  *
   7  *           Copyright 1995 Matthias Ettrich
   8  *           Copyright 1995-1999 The LyX Team.
   9  *
  10  * ====================================================== */
  11
  12 #include <config.h>
  13
  14 #include <cstdlib>
  15 #include <csignal>
  16
  17 #include <unistd.h>
  18 #include <sys/wait.h>
  19
  20 #include "support/lstrings.h"
  21
  22 #ifdef __GNUG__
  23 #pragma implementation
  24 #endif
  25
  26 #include "commandtags.h"
  27 #include "BufferView.h"
  28 #include "bufferlist.h"
  29 #include "LyXView.h"
  30 #include "lyxfunc.h"
  31 #include "insets/lyxinset.h"
  32 #include "minibuffer.h"
  33 #include "lyxscreen.h"
  34 #include "up.xpm"
  35 #include "down.xpm"
  36 #include "debug.h"
  37 #include "lyxdraw.h"
  38 #include "lyx_gui_misc.h"
  39 #include "BackStack.h"
  40 #include "lyxtext.h"
  41 #include "lyx_cb.h"
  42 #include "gettext.h"
  43 #include "layout.h"
  44
  45 extern BufferList bufferlist;
  46 void sigchldhandler(pid_t pid, int *status);
  47
  48 extern void SetXtermCursor(Window win);
  49 extern bool input_prohibited;
  50 extern bool selection_possible;
  51 extern void BeforeChange();
  52 extern char ascii_type;
  53 extern int UnlockInset(UpdatableInset* inset);
  54 extern void ToggleFloat();
  55 extern void MenuPasteSelection(char at);
  56 extern InsetUpdateStruct *InsetUpdateList;
  57 extern void UpdateInsetUpdateList();
  58 extern void FreeUpdateTimer();
  59
  60 // This is _very_ temporary
  61 FL_OBJECT * figinset_canvas;
  62
  63 BufferView::BufferView(LyXView *o, int xpos, int ypos,
  64                        int width, int height)
  65         : owner_(o)
  66 {
  67         buffer_ = 0;
  68 #ifdef MOVE_TEXT
  69         text = 0;
  70 #endif
  71         screen = 0;
  72         work_area = 0;
  73         figinset_canvas = 0;
  74         scrollbar = 0;
  75         button_down = 0;
  76         button_up = 0;
  77         timer_cursor = 0;
  78         current_scrollbar_value = 0;
  79         create_view(xpos, ypos, width, height);
  80         // Activate the timer for the cursor
  81         fl_set_timer(timer_cursor, 0.4);
  82         fl_set_focus_object(owner_->getForm(), work_area);
  83         work_area_focus = true;
  84         lyx_focus = false;
  85 }
  86
  87
  88 BufferView::~BufferView()
  89 {
  90 #ifdef MOVE_TEXT
  91         delete text;
  92 #endif
  93 }
  94
  95
  96 void BufferView::buffer(Buffer *b)
  97 {
  98         lyxerr[Debug::INFO] << "Setting buffer in BufferView" << endl;
  99         if (buffer_) {
 100                 buffer_->InsetSleep();
 101                 buffer_->delUser(this);
 102                 delete text;
 103                 text = 0;
 104         }
 105
 106         // Set current buffer
 107         buffer_ = b;
 108
 109         if (bufferlist.getState() == BufferList::CLOSING) return;
 110
 111         // Nuke old image
 112         if (screen)
 113                 delete screen;
 114         screen = 0;
 115
 116         // If we are closing the buffer, use the first buffer as current
 117         if (!buffer_) {
 118                 buffer_ = bufferlist.first();
 119         }
 120
 121         if (buffer_) {
 122                 lyxerr[Debug::INFO] << "  Buffer addr: " << buffer_ << endl;
 123                 buffer_->addUser(this);
 124                 owner_->getMenus()->showMenus();
 125                 // If we don't have a text object for this, we make one
 126 #ifdef MOVE_TEXT
 127                 if (text == 0)
 128                         resizeCurrentBuffer();
 129                 else {
 130                         updateScreen();
 131                         updateScrollbar();
 132                 }
 133 #else
 134                 if (buffer_->text == 0)
 135                         resizeCurrentBuffer();
 136                 else {
 137                         updateScreen();
 138                         updateScrollbar();
 139                 }
 140 #endif
 141                 screen->first = screen->TopCursorVisible();
 142                 redraw();
 143                 updateAllVisibleBufferRelatedPopups();
 144                 buffer_->InsetWakeup();
 145         } else {
 146                 lyxerr[Debug::INFO] << "  No Buffer!" << endl;
 147                 owner_->getMenus()->hideMenus();
 148                 updateScrollbar();
 149                 fl_redraw_object(work_area);
 150         }
 151         // should update layoutchoice even if we don't have a buffer.
 152         owner_->updateLayoutChoice();
 153         owner_->getMiniBuffer()->Init();
 154         owner_->updateWindowTitle();
 155 }
 156
 157
 158 void BufferView::updateScreen()
 159 {
 160         // Regenerate the screen.
 161         if (screen)
 162                 delete screen;
 163 #ifdef MOVE_TEXT
 164         screen = new LyXScreen(FL_ObjWin(work_area),
 165                                work_area->w,
 166                                work_area->h,
 167                                work_area->x,
 168                                work_area->y,
 169                                text);
 170 #else
 171         screen = new LyXScreen(FL_ObjWin(work_area),
 172                                work_area->w,
 173                                work_area->h,
 174                                work_area->x,
 175                                work_area->y,
 176                                buffer_->text);
 177 #endif
 178 }
 179
 180
 181 void BufferView::resize()
 182 {
 183         // This will resize the buffer. (Asger)
 184         if (buffer_)
 185                 resizeCurrentBuffer();
 186 }
 187
 188
 189 static bool lgb_hack = false;
 190
 191 void BufferView::redraw()
 192 {
 193         lyxerr[Debug::INFO] << "BufferView::redraw()" << endl;
 194         lgb_hack = true;
 195         fl_redraw_object(work_area);
 196         fl_redraw_object(scrollbar);
 197         fl_redraw_object(button_down);
 198         fl_redraw_object(button_up);
 199         lgb_hack = false;
 200 }
 201
 202
 203 void BufferView::fitCursor()
 204 {
 205         if (screen) screen->FitCursor();
 206 }
 207
 208
 209 void BufferView::update()
 210 {
 211         if (screen) screen->Update();
 212 }
 213
 214
 215 void BufferView::updateScrollbar()
 216 {
 217         /* If the text is smaller than the working area, the scrollbar
 218          * maximum must be the working area height. No scrolling will
 219          * be possible */
 220
 221         if (!buffer_) {
 222                 fl_set_slider_value(scrollbar, 0);
 223                 fl_set_slider_size(scrollbar, scrollbar->h);
 224                 return;
 225         }
 226
 227         static long max2 = 0;
 228         static long height2 = 0;
 229
 230         long cbth = 0;
 231         long cbsf = 0;
 232
 233 #ifdef MOVE_TEXT
 234         if (text)
 235                 cbth = text->height;
 236 #else
 237         if (buffer_->text)
 238                 cbth = buffer_->text->height;
 239 #endif
 240         if (screen)
 241                 cbsf = screen->first;
 242
 243         // check if anything has changed.
 244         if (max2 == cbth &&
 245             height2 == work_area->h &&
 246             current_scrollbar_value == cbsf)
 247                 return;       // no
 248
 249         max2 = cbth;
 250         height2 = work_area->h;
 251         current_scrollbar_value = cbsf;
 252
 253         if (cbth <= height2) { // text is smaller than screen
 254                 fl_set_slider_size(scrollbar, scrollbar->h);
 255                 return;
 256         }
 257
 258         long maximum_height = work_area->h * 3/4 + cbth;
 259         long value = cbsf;
 260
 261         // set the scrollbar
 262         double hfloat = work_area->h;
 263         double maxfloat = maximum_height;
 264
 265         fl_set_slider_value(scrollbar, value);
 266         fl_set_slider_bounds(scrollbar, 0,
 267                              maximum_height - work_area->h);
 268 #if FL_REVISION > 85
 269 #ifdef MOVE_TEXT
 270         double lineh = text->DefaultHeight();
 271 #else
 272         double lineh = buffer_->text->DefaultHeight();
 273 #endif
 274         fl_set_slider_increment(scrollbar, work_area->h-lineh, lineh);
 275 #endif
 276         if (maxfloat > 0){
 277                 if ((hfloat / maxfloat) * float(height2) < 3)
 278                         fl_set_slider_size(scrollbar,
 279                                            3 / float(height2));
 280                 else
 281                         fl_set_slider_size(scrollbar,
 282                                            hfloat / maxfloat);
 283         } else
 284                 fl_set_slider_size(scrollbar, hfloat);
 285         fl_set_slider_precision(scrollbar, 0);
 286 }
 287
 288
 289 void BufferView::redoCurrentBuffer()
 290 {
 291         lyxerr[Debug::INFO] << "BufferView::redoCurrentBuffer" << endl;
 292 #ifdef MOVE_TEXT
 293         if (text) {
 294                 resize();
 295                 owner_->updateLayoutChoice();
 296         }
 297 #else
 298         if (buffer_ && buffer_->text) {
 299                 resize();
 300                 owner_->updateLayoutChoice();
 301         }
 302 #endif
 303 }
 304
 305
 306 int BufferView::resizeCurrentBuffer()
 307 {
 308         lyxerr[Debug::INFO] << "resizeCurrentBuffer" << endl;
 309
 310         LyXParagraph * par = 0;
 311         LyXParagraph * selstartpar = 0;
 312         LyXParagraph * selendpar = 0;
 313         int pos = 0;
 314         int selstartpos = 0;
 315         int selendpos = 0;
 316         int selection = 0;
 317         int mark_set = 0;
 318
 319         ProhibitInput();
 320
 321         owner_->getMiniBuffer()->Set(_("Formatting document..."));
 322
 323 #ifdef MOVE_TEXT
 324         if (text) {
 325                 par = text->cursor.par;
 326                 pos = text->cursor.pos;
 327                 selstartpar = text->sel_start_cursor.par;
 328                 selstartpos = text->sel_start_cursor.pos;
 329                 selendpar = text->sel_end_cursor.par;
 330                 selendpos = text->sel_end_cursor.pos;
 331                 selection = text->selection;
 332                 mark_set = text->mark_set;
 333                 delete text;
 334         }
 335         text = new LyXText(work_area->w, buffer_);
 336 #else
 337         if (buffer_->text) {
 338                 par = buffer_->text->cursor.par;
 339                 pos = buffer_->text->cursor.pos;
 340                 selstartpar = buffer_->text->sel_start_cursor.par;
 341                 selstartpos = buffer_->text->sel_start_cursor.pos;
 342                 selendpar = buffer_->text->sel_end_cursor.par;
 343                 selendpos = buffer_->text->sel_end_cursor.pos;
 344                 selection = buffer_->text->selection;
 345                 mark_set = buffer_->text->mark_set;
 346                 delete buffer_->text;
 347         }
 348         buffer_->text = new LyXText(work_area->w, buffer_);
 349 #endif
 350
 351         updateScreen();
 352
 353 #ifdef MOVE_TEXT
 354         if (par) {
 355                 text->selection = true;
 356                 /* at this point just
 357                  * to avoid the Delete-
 358                  * Empty-Paragraph
 359                  * Mechanism when
 360                  * setting the cursor */
 361                 text->mark_set = mark_set;
 362                 if (selection) {
 363                         text->SetCursor(selstartpar, selstartpos);
 364                         text->sel_cursor = text->cursor;
 365                         text->SetCursor(selendpar, selendpos);
 366                         text->SetSelection();
 367                         text->SetCursor(par, pos);
 368                 } else {
 369                        text->SetCursor(par, pos);
 370                         text->sel_cursor = text->cursor;
 371                         text->selection = false;
 372                 }
 373         }
 374 #else
 375         if (par) {
 376                 buffer_->text->selection = true;
 377                 /* at this point just
 378                  * to avoid the Delete-
 379                  * Empty-Paragraph
 380                  * Mechanism when
 381                  * setting the cursor */
 382                 buffer_->text->mark_set = mark_set;
 383                 if (selection) {
 384                         buffer_->text->SetCursor(selstartpar, selstartpos);
 385                         buffer_->text->sel_cursor = buffer_->text->cursor;
 386                         buffer_->text->SetCursor(selendpar, selendpos);
 387                         buffer_->text->SetSelection();
 388                         buffer_->text->SetCursor(par, pos);
 389                 } else {
 390                         buffer_->text->SetCursor(par, pos);
 391                         buffer_->text->sel_cursor = buffer_->text->cursor;
 392                         buffer_->text->selection = false;
 393                 }
 394         }
 395 #endif
 396         screen->first = screen->TopCursorVisible(); /* this will scroll the
 397                                                      * screen such that the
 398                                                      * cursor becomes
 399                                                      * visible */
 400         updateScrollbar();
 401         redraw();
 402         owner_->getMiniBuffer()->Init();
 403         AllowInput();
 404
 405         // Now if the title form still exist kill it
 406         TimerCB(0, 0);
 407
 408         return 0;
 409 }
 410
 411
 412 void BufferView::gotoError()
 413 {
 414         if (!screen)
 415                 return;
 416
 417         screen->HideCursor();
 418         BeforeChange();
 419 #ifdef MOVE_TEXT
 420         update(-2);
 421 #else
 422         buffer_->update(-2);
 423 #endif
 424         LyXCursor tmp;
 425
 426 #ifdef MOVE_TEXT
 427         if (!text->GotoNextError()) {
 428                 if (text->cursor.pos
 429                     || text->cursor.par != text->FirstParagraph()) {
 430                         tmp = text->cursor;
 431                         text->cursor.par = text->FirstParagraph();
 432                         text->cursor.pos = 0;
 433                         if (!text->GotoNextError()) {
 434                                 text->cursor = tmp;
 435                                 owner_->getMiniBuffer()->Set(_("No more errors"));
 436                                 LyXBell();
 437                         }
 438                 } else {
 439                         owner_->getMiniBuffer()->Set(_("No more errors"));
 440                         LyXBell();
 441                 }
 442         }
 443         update(0);
 444         text->sel_cursor = text->cursor;
 445 #else
 446         if (!buffer_->text->GotoNextError()) {
 447                 if (buffer_->text->cursor.pos
 448                     || buffer_->text->cursor.par !=
 449                     buffer_->text->FirstParagraph()) {
 450                         tmp = buffer_->text->cursor;
 451                         buffer_->text->cursor.par =
 452                                 buffer_->text->FirstParagraph();
 453                         buffer_->text->cursor.pos = 0;
 454                         if (!buffer_->text->GotoNextError()) {
 455                                 buffer_->text->cursor = tmp;
 456                                 owner_->getMiniBuffer()->Set(_("No more errors"));
 457                                 LyXBell();
 458                         }
 459                 } else {
 460                         owner_->getMiniBuffer()->Set(_("No more errors"));
 461                         LyXBell();
 462                 }
 463         }
 464         buffer_->update(0);
 465         buffer_->text->sel_cursor =
 466                 buffer_->text->cursor;
 467 #endif
 468 }
 469
 470
 471 // Just a bunch of C wrappers around static members of BufferView
 472 extern "C" void C_BufferView_UpCB(FL_OBJECT * ob, long buf) {
 473         BufferView::UpCB(ob, buf);
 474 }
 475
 476 extern "C" void C_BufferView_DownCB(FL_OBJECT * ob, long buf) {
 477         BufferView::DownCB(ob, buf);
 478 }
 479
 480 extern "C" void C_BufferView_ScrollCB(FL_OBJECT * ob, long buf) {
 481         BufferView::ScrollCB(ob, buf);
 482 }
 483
 484 extern "C" void C_BufferView_CursorToggleCB(FL_OBJECT * ob, long buf) {
 485         BufferView::CursorToggleCB(ob, buf);
 486 }
 487
 488 extern "C" int C_BufferView_work_area_handler(FL_OBJECT * ob, int event,
 489                                               FL_Coord, FL_Coord,
 490                                               int key, void * xev) {
 491         return BufferView::work_area_handler(ob, event, 0, 0, key, xev);
 492 }
 493
 494
 495 void BufferView::create_view(int xpos, int ypos, int width, int height)
 496 {
 497         FL_OBJECT * obj;
 498         const int bw = abs(fl_get_border_width());
 499
 500         // a hack for the figinsets (Matthias)
 501         // This one first, then it will probably be invisible. (Lgb)
 502         ::figinset_canvas = figinset_canvas = obj =
 503                 fl_add_canvas(FL_NORMAL_CANVAS,
 504                               xpos + 1,
 505                               ypos + 1, 1, 1, "");
 506         fl_set_object_boxtype(obj, FL_NO_BOX);
 507         fl_set_object_resize(obj, FL_RESIZE_ALL);
 508         fl_set_object_gravity(obj, NorthWestGravity, NorthWestGravity);
 509
 510         // a box
 511         obj = fl_add_box(FL_BORDER_BOX, xpos, ypos,
 512                          width - 15,
 513                          height, "");
 514         fl_set_object_resize(obj, FL_RESIZE_ALL);
 515         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 516
 517         // the free object
 518         work_area = obj = fl_add_free(FL_INPUT_FREE,
 519                                       xpos +bw, ypos+bw,
 520                                       width-15-2*bw /* scrollbarwidth */,
 521                                       height-2*bw, "",
 522                                       C_BufferView_work_area_handler);
 523         obj->wantkey = FL_KEY_TAB;
 524         obj->u_vdata = this; /* This is how we pass the BufferView
 525                                        to the work_area_handler. */
 526         fl_set_object_boxtype(obj, FL_DOWN_BOX);
 527         fl_set_object_resize(obj, FL_RESIZE_ALL);
 528         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 529
 530         //
 531         // THE SCROLLBAR
 532         //
 533
 534         // up - scrollbar button
 535 #if FL_REVISION > 85
 536         fl_set_border_width(-1);
 537 #else
 538         fl_set_border_width(-2); // to get visible feedback
 539 #endif
 540         button_up = obj = fl_add_pixmapbutton(FL_TOUCH_BUTTON,
 541                                               width-15+4*bw,
 542                                               ypos,
 543                                               15, 15, "");
 544         fl_set_object_boxtype(obj, FL_UP_BOX);
 545         fl_set_object_color(obj, FL_MCOL, FL_BLUE);
 546         fl_set_object_resize(obj, FL_RESIZE_ALL);
 547         fl_set_object_gravity(obj, NorthEastGravity, NorthEastGravity);
 548         fl_set_object_callback(obj, C_BufferView_UpCB, 0);
 549         obj->u_vdata = this;
 550         fl_set_pixmapbutton_data(obj, const_cast<char**>(up_xpm));
 551
 552 #if FL_REVISION > 85
 553         // Remove the blue feedback rectangle
 554         fl_set_pixmapbutton_focus_outline(obj, 0);
 555 #endif
 556
 557         // the scrollbar slider
 558         fl_set_border_width(-bw);
 559         scrollbar = obj = fl_add_slider(FL_VERT_SLIDER,
 560                                         width-15+4*bw,
 561                                         ypos + 15,
 562                                         15, height-30, "");
 563         fl_set_object_color(obj, FL_COL1, FL_MCOL);
 564         fl_set_object_boxtype(obj, FL_UP_BOX);
 565         fl_set_object_resize(obj, FL_RESIZE_ALL);
 566         fl_set_object_gravity(obj, NorthEastGravity, SouthEastGravity);
 567         fl_set_object_callback(obj, C_BufferView_ScrollCB, 0);
 568         obj->u_vdata = this;
 569
 570         // down - scrollbar button
 571 #if FL_REVISION > 85
 572         fl_set_border_width(-1);
 573 #else
 574         fl_set_border_width(-2); // to get visible feedback
 575 #endif
 576         button_down = obj = fl_add_pixmapbutton(FL_TOUCH_BUTTON,
 577                                                       width-15+4*bw,
 578                                                       ypos + height-15,
 579                                                       15, 15, "");
 580         fl_set_object_boxtype(obj, FL_UP_BOX);
 581         fl_set_object_color(obj, FL_MCOL, FL_BLUE);
 582         fl_set_object_resize(obj, FL_RESIZE_ALL);
 583         fl_set_object_gravity(obj, SouthEastGravity, SouthEastGravity);
 584         fl_set_object_callback(obj, C_BufferView_DownCB, 0);
 585         obj->u_vdata = this;
 586         fl_set_pixmapbutton_data(obj, const_cast<char**>(down_xpm));
 587         fl_set_border_width(-bw);
 588
 589 #if FL_REVISION >85
 590         // Remove the blue feedback rectangle
 591         fl_set_pixmapbutton_focus_outline(obj, 0);
 592 #endif
 593
 594         //
 595         // TIMERS
 596         //
 597
 598         // timer_cursor
 599         timer_cursor = obj = fl_add_timer(FL_HIDDEN_TIMER,
 600                                           0, 0, 0, 0, "Timer");
 601         fl_set_object_callback(obj, C_BufferView_CursorToggleCB, 0);
 602         obj->u_vdata = this;
 603 }
 604
 605
 606 // Callback for scrollbar up button
 607 void BufferView::UpCB(FL_OBJECT * ob, long)
 608 {
 609         BufferView * view = static_cast<BufferView*>(ob->u_vdata);
 610
 611         if (view->buffer_ == 0) return;
 612
 613         XEvent const * ev2;
 614         static long time = 0;
 615         ev2 = fl_last_event();
 616         if (ev2->type == ButtonPress || ev2->type == ButtonRelease)
 617                 time = 0;
 618         int button = fl_get_button_numb(ob);
 619         switch (button) {
 620         case 3:
 621                 view->ScrollUpOnePage(time++); break;
 622         case 2:
 623                 view->ScrollDownOnePage(time++); break;
 624         default:
 625                 view->ScrollUp(time++); break;
 626         }
 627 }
 628
 629
 630 static
 631 void waitForX()
 632 {
 633 #if 0
 634         static Window w = 0;
 635         static Atom a = 0;
 636         if (!a)
 637                 a = XInternAtom(fl_display, "WAIT_FOR_X", False);
 638         if (w == 0) {
 639                 int mask;
 640                 XSetWindowAttributes attr;
 641                 mask = CWOverrideRedirect;
 642                 attr.override_redirect = 1;
 643                 w = XCreateWindow(fl_display, fl_root,
 644                                   0, 0, 1, 1, 0, CopyFromParent,
 645                                   InputOnly, CopyFromParent, mask, &attr);
 646                 XSelectInput(fl_display, w, PropertyChangeMask);
 647                 XMapWindow(fl_display, w);
 648         }
 649         static XEvent ev;
 650         XChangeProperty(fl_display, w, a, a, 8,
 651                         PropModeAppend, reinterpret_cast<unsigned char*>(""), 0);
 652         XWindowEvent(fl_display, w, PropertyChangeMask, &ev);
 653 #endif
 654         XSync(fl_get_display(), 0);
 655 }
 656
 657
 658 // Callback for scrollbar slider
 659 void BufferView::ScrollCB(FL_OBJECT * ob, long)
 660 {
 661         BufferView * view = static_cast<BufferView*>(ob->u_vdata);
 662         extern bool cursor_follows_scrollbar;
 663
 664         if (view->buffer_ == 0) return;
 665
 666         view->current_scrollbar_value = long(fl_get_slider_value(ob));
 667         if (view->current_scrollbar_value < 0)
 668                 view->current_scrollbar_value = 0;
 669
 670         if (!view->screen)
 671                 return;
 672
 673         view->screen->Draw(view->current_scrollbar_value);
 674
 675         if (cursor_follows_scrollbar) {
 676 #ifdef MOVE_TEXT
 677                 LyXText * vbt = view->text;
 678 #else
 679                 LyXText * vbt = view->buffer_->text;
 680 #endif
 681                 int height = vbt->DefaultHeight();
 682
 683                 if (vbt->cursor.y < view->screen->first + height) {
 684                         vbt->SetCursorFromCoordinates(0,
 685                                                       view->screen->first +
 686                                                       height);
 687                 }
 688                 else if (vbt->cursor.y >
 689                          view->screen->first + view->work_area->h - height) {
 690                         vbt->SetCursorFromCoordinates(0,
 691                                                       view->screen->first +
 692                                                       view->work_area->h  -
 693                                                       height);
 694                 }
 695         }
 696         waitForX();
 697 }
 698
 699
 700 // Callback for scrollbar down button
 701 void BufferView::DownCB(FL_OBJECT * ob, long)
 702 {
 703         BufferView * view = static_cast<BufferView*>(ob->u_vdata);
 704
 705         if (view->buffer_ == 0) return;
 706
 707         XEvent const * ev2;
 708         static long time = 0;
 709         ev2 = fl_last_event();
 710         if (ev2->type == ButtonPress || ev2->type == ButtonRelease)
 711                 time = 0;
 712         int button = fl_get_button_numb(ob);
 713         switch (button) {
 714         case 2:
 715                 view->ScrollUpOnePage(time++); break;
 716         case 3:
 717                 view->ScrollDownOnePage(time++); break;
 718         default:
 719                 view->ScrollDown(time++); break;
 720         }
 721 }
 722
 723
 724 int BufferView::ScrollUp(long time)
 725 {
 726         if (buffer_ == 0) return 0;
 727         if (!screen)
 728                 return 0;
 729
 730         double value= fl_get_slider_value(scrollbar);
 731
 732         if (value == 0)
 733                 return 0;
 734
 735 #ifdef MOVE_TEXT
 736         float add_value =  (text->DefaultHeight()
 737                             + float(time) * float(time) * 0.125);
 738
 739         if (add_value > work_area->h)
 740                 add_value = float(work_area->h -
 741                                   text->DefaultHeight());
 742 #else
 743         float add_value =  (buffer_->text->DefaultHeight()
 744                             + float(time) * float(time) * 0.125);
 745
 746         if (add_value > work_area->h)
 747                 add_value = float(work_area->h -
 748                                   buffer_->text->DefaultHeight());
 749 #endif
 750
 751         value -= add_value;
 752
 753         if (value < 0)
 754                 value = 0;
 755
 756         fl_set_slider_value(scrollbar, value);
 757
 758         ScrollCB(scrollbar, 0);
 759         return 0;
 760 }
 761
 762
 763 int BufferView::ScrollDown(long time)
 764 {
 765         if (buffer_ == 0) return 0;
 766         if (!screen)
 767                 return 0;
 768
 769         double value= fl_get_slider_value(scrollbar);
 770         double min, max;
 771         fl_get_slider_bounds(scrollbar, &min, &max);
 772
 773         if (value == max)
 774                 return 0;
 775
 776 #ifdef MOVE_TEXT
 777         float add_value =  (text->DefaultHeight()
 778                             + float(time) * float(time) * 0.125);
 779
 780         if (add_value > work_area->h)
 781                 add_value = float(work_area->h -
 782                                   text->DefaultHeight());
 783 #else
 784         float add_value =  (buffer_->text->DefaultHeight()
 785                             + float(time) * float(time) * 0.125);
 786
 787         if (add_value > work_area->h)
 788                 add_value = float(work_area->h -
 789                                   buffer_->text->DefaultHeight());
 790 #endif
 791
 792         value += add_value;
 793
 794         if (value > max)
 795                 value = max;
 796
 797         fl_set_slider_value(scrollbar, value);
 798
 799         ScrollCB(scrollbar, 0);
 800         return 0;
 801 }
 802
 803
 804 void BufferView::ScrollUpOnePage(long /*time*/)
 805 {
 806         if (buffer_ == 0) return;
 807         if (!screen)
 808                 return;
 809
 810         long y = screen->first;
 811
 812         if (!y) return;
 813 #ifdef MOVE_TEXT
 814         Row * row = text->GetRowNearY(y);
 815 #else
 816         Row * row = buffer_->text->GetRowNearY(y);
 817 #endif
 818         y = y - work_area->h + row->height;
 819
 820         fl_set_slider_value(scrollbar, y);
 821
 822         ScrollCB(scrollbar, 0);
 823 }
 824
 825
 826 void BufferView::ScrollDownOnePage(long /*time*/)
 827 {
 828         if (buffer_ == 0) return;
 829         if (!screen)
 830                 return;
 831
 832         double min, max;
 833         fl_get_slider_bounds(scrollbar, &min, &max);
 834         long y = screen->first;
 835
 836 #ifdef MOVE_TEXT
 837         if (y > text->height - work_area->h)
 838                 return;
 839
 840         y += work_area->h;
 841         text->GetRowNearY(y);
 842 #else
 843         if (y > buffer_->text->height - work_area->h)
 844                 return;
 845
 846         y += work_area->h;
 847         buffer_->text->GetRowNearY(y);
 848 #endif
 849         fl_set_slider_value(scrollbar, y);
 850
 851         ScrollCB(scrollbar, 0);
 852 }
 853
 854
 855 int BufferView::work_area_handler(FL_OBJECT * ob, int event,
 856                                   FL_Coord, FL_Coord ,
 857                                   int /*key*/, void *xev)
 858 {
 859         static int x_old = -1;
 860         static int y_old = -1;
 861         static long scrollbar_value_old = -1;
 862
 863         XEvent * ev = static_cast<XEvent*>(xev);
 864         BufferView * view = static_cast<BufferView*>(ob->u_vdata);
 865
 866         // If we don't have a view yet; return
 867         if (!view || quitting) return 0;
 868
 869         switch (event){
 870         case FL_DRAW:
 871                 view->workAreaExpose();
 872                 break;
 873         case FL_PUSH:
 874                 view->WorkAreaButtonPress(ob, 0, 0, 0, ev, 0);
 875                 break;
 876         case FL_RELEASE:
 877                 view->WorkAreaButtonRelease(ob, 0, 0, 0, ev, 0);
 878                 break;
 879         case FL_MOUSE:
 880                 if (ev->xmotion.x != x_old ||
 881                     ev->xmotion.y != y_old ||
 882                     view->current_scrollbar_value != scrollbar_value_old) {
 883                         x_old = ev->xmotion.x;
 884                         y_old = ev->xmotion.y;
 885                         scrollbar_value_old = view->current_scrollbar_value;
 886                         view->WorkAreaMotionNotify(ob, 0, 0, 0, ev, 0);
 887                 }
 888                 break;
 889         // Done by the raw callback:
 890         //  case FL_KEYBOARD: WorkAreaKeyPress(ob, 0, 0, 0, ev, 0); break;
 891         case FL_FOCUS:
 892                 if (!view->owner_->getMiniBuffer()->shows_no_match)
 893                         view->owner_->getMiniBuffer()->Init();
 894                 view->owner_->getMiniBuffer()->shows_no_match = false;
 895                 view->work_area_focus = true;
 896                 fl_set_timer(view->timer_cursor, 0.4);
 897                 break;
 898         case FL_UNFOCUS:
 899                 view->owner_->getMiniBuffer()->ExecCommand();
 900                 view->work_area_focus = false;
 901                 break;
 902         case FL_ENTER:
 903                 SetXtermCursor(view->owner_->getForm()->window);
 904                 // reset the timer
 905                 view->lyx_focus = true;
 906                 fl_set_timer(view->timer_cursor, 0.4);
 907                 break;
 908         case FL_LEAVE:
 909                 if (!input_prohibited)
 910                         XUndefineCursor(fl_display,
 911                                         view->owner_->getForm()->window);
 912                 view->lyx_focus = false; // This is not an absolute truth
 913                 // but if it is not true, it will be changed within a blink
 914                 // of an eye. ... Not good enough... use regulare timeperiod
 915                 //fl_set_timer(view->timer_cursor, 0.01); // 0.1 sec blink
 916                 fl_set_timer(view->timer_cursor, 0.4); // 0.4 sec blink
 917                 break;
 918         case FL_DBLCLICK:
 919                 // select a word
 920                 if (view->buffer_ && !view->buffer_->the_locking_inset) {
 921                         if (view->screen && ev->xbutton.button == 1) {
 922                                 view->screen->HideCursor();
 923                                 view->screen->ToggleSelection();
 924 #ifdef MOVE_TEXT
 925                                 view->text->SelectWord();
 926 #else
 927                                 view->buffer_->text->SelectWord();
 928 #endif
 929                                 view->screen->ToggleSelection(false);
 930                                 /* This will fit the cursor on the screen
 931                                  * if necessary */
 932 #ifdef MOVE_TEXT
 933                                 view->update(0);
 934 #else
 935                                 view->buffer_->update(0);
 936 #endif
 937                         }
 938                 }
 939                 break;
 940         case FL_TRPLCLICK:
 941                 // select a line
 942                 if (view->buffer_ && view->screen && ev->xbutton.button == 1) {
 943                         view->screen->HideCursor();
 944                         view->screen->ToggleSelection();
 945 #ifdef MOVE_TEXT
 946                         view->text->CursorHome();
 947                         view->text->sel_cursor = view->text->cursor;
 948                         view->text->CursorEnd();
 949                         view->text->SetSelection();
 950 #else
 951                         view->buffer_->text->CursorHome();
 952                         view->buffer_->text->sel_cursor =
 953                                 view->buffer_->text->cursor;
 954                         view->buffer_->text->CursorEnd();
 955                         view->buffer_->text->SetSelection();
 956 #endif
 957                         view->screen->ToggleSelection(false);
 958                         /* This will fit the cursor on the screen
 959                          * if necessary */
 960 #ifdef MOVE_TEXT
 961                         view->update(0);
 962 #else
 963                         view->buffer_->update(0);
 964 #endif
 965                 }
 966                 break;
 967         case FL_OTHER:
 968                 view->WorkAreaSelectionNotify(ob,
 969                                               view->owner_->getForm()->window,
 970                                               0, 0, ev, 0);
 971                 break;
 972         }
 973         return 1;
 974 }
 975
 976 int BufferView::WorkAreaMotionNotify(FL_OBJECT *ob, Window,
 977                                      int /*w*/, int /*h*/,
 978                                      XEvent *ev, void */*d*/)
 979 {
 980
 981         if (buffer_ == 0) return 0;
 982         if (!screen) return 0;
 983
 984         // Check for inset locking
 985         if (buffer_->the_locking_inset) {
 986 #ifdef MOVE_TEXT
 987                 LyXCursor cursor = text->cursor;
 988 #else
 989                 LyXCursor cursor = buffer_->text->cursor;
 990 #endif
 991                 buffer_->the_locking_inset->
 992                         InsetMotionNotify(ev->xbutton.x - ob->x - cursor.x,
 993                                           ev->xbutton.y - ob->y -
 994                                           (cursor.y),
 995                                           ev->xbutton.state);
 996                 return 0;
 997         }
 998
 999         // Only use motion with button 1
1000         if (!ev->xmotion.state & Button1MotionMask)
1001                 return 0;
1002
1003         /* The selection possible is needed, that only motion events are
1004          * used, where the bottom press event was on the drawing area too */
1005         if (selection_possible) {
1006                 screen->HideCursor();
1007
1008 #ifdef MOVE_TEXT
1009                 text->SetCursorFromCoordinates(ev->xbutton.x - ob->x,
1010                                                ev->xbutton.y - ob->y +
1011                                                screen->first);
1012
1013                 if (!text->selection)
1014                         update(-3); // Maybe an empty line was deleted
1015
1016                 text->SetSelection();
1017 #else
1018                 buffer_->text->
1019                         SetCursorFromCoordinates(ev->xbutton.x - ob->x,
1020                                                  ev->xbutton.y - ob->y +
1021                                                  screen->first);
1022
1023                 if (!buffer_->text->selection)
1024                     buffer_->update(-3); // Maybe an empty line was deleted
1025
1026                 buffer_->text->SetSelection();
1027 #endif
1028                 screen->ToggleToggle();
1029                 if (screen->FitCursor())
1030                         updateScrollbar();
1031                 screen->ShowCursor();
1032         }
1033         return 0;
1034 }
1035
1036
1037 extern int bibitemMaxWidth(LyXFont const &);
1038
1039 #ifdef MOVE_TEXT
1040 // Single-click on work area
1041 int BufferView::WorkAreaButtonPress(FL_OBJECT *ob, Window,
1042                         int /*w*/, int /*h*/, XEvent *ev, void */*d*/)
1043 {
1044         last_click_x = -1;
1045         last_click_y = -1;
1046
1047         if (buffer_ == 0) return 0;
1048         if (!screen) return 0;
1049
1050         int const x = ev->xbutton.x - ob->x;
1051         int const y = ev->xbutton.y - ob->y;
1052         // If we hit an inset, we have the inset coordinates in these
1053         // and inset_hit points to the inset.  If we do not hit an
1054         // inset, inset_hit is 0, and inset_x == x, inset_y == y.
1055         int inset_x = x;
1056         int inset_y = y;
1057         Inset * inset_hit = checkInsetHit(inset_x, inset_y);
1058
1059         // ok ok, this is a hack.
1060         int button = ev->xbutton.button;
1061         if (button == 4 || button == 5) goto wheel;
1062
1063         {
1064
1065         if (buffer_->the_locking_inset) {
1066                 // We are in inset locking mode
1067
1068                 /* Check whether the inset was hit. If not reset mode,
1069                    otherwise give the event to the inset */
1070                 if (inset_hit != 0) {
1071                         buffer_->the_locking_inset->
1072                                 InsetButtonPress(inset_x, inset_y, button);
1073                         return 0;
1074                 } else {
1075                         UnlockInset(buffer_->the_locking_inset);
1076                 }
1077         }
1078
1079         selection_possible = true;
1080         screen->HideCursor();
1081
1082         // Right button mouse click on a table
1083         if (button == 3 &&
1084             (text->cursor.par->table ||
1085              text->MouseHitInTable(x, y + screen->first))) {
1086                 // Set the cursor to the press-position
1087                 text->SetCursorFromCoordinates(x, y + screen->first);
1088                 bool doit = true;
1089
1090                 // Only show the table popup if the hit is in the table, too
1091                 if (!text->HitInTable(text->cursor.row, x))
1092                         doit = false;
1093
1094                 // Hit above or below the table?
1095                 if (doit) {
1096                         if (!text->selection) {
1097                                 screen->ToggleSelection();
1098                                 text->ClearSelection();
1099                                 text->FullRebreak();
1100                                 screen->Update();
1101                                 updateScrollbar();
1102                         }
1103                         // Popup table popup when on a table.
1104                         // This is obviously temporary, since we should be
1105                         // able to
1106                         // popup various context-sensitive-menus with the
1107                         // the right mouse. So this should be done more
1108                         // general in the future. Matthias.
1109                         selection_possible = false;
1110                         owner_->getLyXFunc()->Dispatch(LFUN_LAYOUT_TABLE,
1111                                                        "true");
1112                         return 0;
1113                 }
1114         }
1115
1116         int screen_first = screen->first;
1117
1118         // Middle button press pastes if we have a selection
1119         bool paste_internally = false;
1120         if (button == 2  // && !buffer_->the_locking_inset
1121             && text->selection) {
1122                 owner_->getLyXFunc()->Dispatch(LFUN_COPY);
1123                 paste_internally = true;
1124         }
1125
1126         // Clear the selection
1127         screen->ToggleSelection();
1128         text->ClearSelection();
1129         text->FullRebreak();
1130         screen->Update();
1131         updateScrollbar();
1132
1133         // Single left click in math inset?
1134         if (inset_hit != 0 && inset_hit->Editable() == 2) {
1135                 // Highly editable inset, like math
1136                 selection_possible = false;
1137                 owner_->updateLayoutChoice();
1138                 owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
1139                 inset_hit->Edit(inset_x, inset_y);
1140                 return 0;
1141         }
1142
1143         // Right click on a footnote flag opens float menu
1144         if (button == 3) {
1145                 selection_possible = false;
1146                 return 0;
1147         }
1148
1149         text->SetCursorFromCoordinates(x, y + screen_first);
1150         text->FinishUndo();
1151         text->sel_cursor = text->cursor;
1152         text->cursor.x_fix = text->cursor.x;
1153
1154         owner_->updateLayoutChoice();
1155         if (screen->FitCursor()){
1156                 updateScrollbar();
1157                 selection_possible = false;
1158         }
1159
1160         // Insert primary selection with middle mouse
1161         // if there is a local selection in the current buffer, insert this
1162         if (button == 2) { //  && !buffer_->the_locking_inset){
1163                 if (paste_internally)
1164                         owner_->getLyXFunc()->Dispatch(LFUN_PASTE);
1165                 else
1166                         owner_->getLyXFunc()->Dispatch(LFUN_PASTESELECTION,
1167                                                        "paragraph");
1168                 selection_possible = false;
1169                 return 0;
1170         }
1171         }
1172         goto out;
1173  wheel: {
1174         // I am not quite sure if this is the correct place to put this,
1175         // but it will not cause any harm.
1176         // Patch from Mark Huang (markman@mit.edu) to make LyX recognise
1177         // button 4 and 5. This enables LyX use use the scrollwhell on
1178         // certain mice for something useful. (Lgb)
1179         // Added wheel acceleration detection code. (Rvdk)
1180         static Time lastTime = 0;
1181         int diff = ev->xbutton.time - lastTime;
1182         int scroll = int(1.0 + (4.0/(abs(diff)+1.0))*200.0);
1183         switch (button) {
1184         case 4:
1185                 ScrollUp(scroll);
1186                 break;
1187         case 5:
1188                 ScrollDown(scroll);
1189                 break;
1190         }
1191         lastTime = ev->xbutton.time;
1192         return 0;
1193         }
1194  out:
1195         last_click_x = x;
1196         last_click_y = y;
1197
1198         return 0;
1199 }
1200 #else
1201 // Single-click on work area
1202 int BufferView::WorkAreaButtonPress(FL_OBJECT *ob, Window,
1203                         int /*w*/, int /*h*/, XEvent *ev, void */*d*/)
1204 {
1205         last_click_x = -1;
1206         last_click_y = -1;
1207
1208         if (buffer_ == 0) return 0;
1209         if (!screen) return 0;
1210
1211         int const x = ev->xbutton.x - ob->x;
1212         int const y = ev->xbutton.y - ob->y;
1213         // If we hit an inset, we have the inset coordinates in these
1214         // and inset_hit points to the inset.  If we do not hit an
1215         // inset, inset_hit is 0, and inset_x == x, inset_y == y.
1216         int inset_x = x;
1217         int inset_y = y;
1218         Inset * inset_hit = checkInsetHit(inset_x, inset_y);
1219
1220         // ok ok, this is a hack.
1221         int button = ev->xbutton.button;
1222         if (button == 4 || button == 5) goto wheel;
1223
1224         {
1225
1226         if (buffer_->the_locking_inset) {
1227                 // We are in inset locking mode
1228
1229                 /* Check whether the inset was hit. If not reset mode,
1230                    otherwise give the event to the inset */
1231                 if (inset_hit != 0) {
1232                         buffer_->the_locking_inset->
1233                                 InsetButtonPress(inset_x, inset_y, button);
1234                         return 0;
1235                 } else {
1236                         UnlockInset(buffer_->the_locking_inset);
1237                 }
1238         }
1239
1240         selection_possible = true;
1241         screen->HideCursor();
1242
1243         // Right button mouse click on a table
1244         if (button == 3 &&
1245             (buffer_->text->cursor.par->table ||
1246              buffer_->text->MouseHitInTable(x, y+screen->first))) {
1247                 // Set the cursor to the press-position
1248                 buffer_->text->SetCursorFromCoordinates(x, y + screen->first);
1249                 bool doit = true;
1250
1251                 // Only show the table popup if the hit is in the table, too
1252                 if (!buffer_->text->HitInTable(buffer_->text->cursor.row, x))
1253                         doit = false;
1254
1255                 // Hit above or below the table?
1256                 if (doit) {
1257                         if (!buffer_->text->selection) {
1258                                 screen->ToggleSelection();
1259                                 buffer_->text->ClearSelection();
1260                                 buffer_->text->FullRebreak();
1261                                 screen->Update();
1262                                 updateScrollbar();
1263                         }
1264                         // Popup table popup when on a table.
1265                         // This is obviously temporary, since we should be
1266                         // able to
1267                         // popup various context-sensitive-menus with the
1268                         // the right mouse. So this should be done more
1269                         // general in the future. Matthias.
1270                         selection_possible = false;
1271                         owner_->getLyXFunc()->Dispatch(LFUN_LAYOUT_TABLE,
1272                                                        "true");
1273                         return 0;
1274                 }
1275         }
1276
1277         int screen_first = screen->first;
1278
1279         // Middle button press pastes if we have a selection
1280         bool paste_internally = false;
1281         if (button == 2  // && !buffer_->the_locking_inset
1282             && buffer_->text->selection) {
1283                 owner_->getLyXFunc()->Dispatch(LFUN_COPY);
1284                 paste_internally = true;
1285         }
1286
1287         // Clear the selection
1288         screen->ToggleSelection();
1289         buffer_->text->ClearSelection();
1290         buffer_->text->FullRebreak();
1291         screen->Update();
1292         updateScrollbar();
1293
1294         // Single left click in math inset?
1295         if (inset_hit != 0 && inset_hit->Editable() == 2) {
1296                 // Highly editable inset, like math
1297                 selection_possible = false;
1298                 owner_->updateLayoutChoice();
1299                 owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
1300                 inset_hit->Edit(inset_x, inset_y);
1301                 return 0;
1302         }
1303
1304         // Right click on a footnote flag opens float menu
1305         if (button == 3) {
1306                 selection_possible = false;
1307                 return 0;
1308         }
1309
1310         buffer_->text->SetCursorFromCoordinates(x, y + screen_first);
1311         buffer_->text->FinishUndo();
1312         buffer_->text->sel_cursor = buffer_->text->cursor;
1313         buffer_->text->cursor.x_fix = buffer_->text->cursor.x;
1314
1315         owner_->updateLayoutChoice();
1316         if (screen->FitCursor()){
1317                 updateScrollbar();
1318                 selection_possible = false;
1319         }
1320
1321         // Insert primary selection with middle mouse
1322         // if there is a local selection in the current buffer, insert this
1323         if (button == 2) { //  && !buffer_->the_locking_inset){
1324                 if (paste_internally)
1325                         owner_->getLyXFunc()->Dispatch(LFUN_PASTE);
1326                 else
1327                         owner_->getLyXFunc()->Dispatch(LFUN_PASTESELECTION,
1328                                                        "paragraph");
1329                 selection_possible = false;
1330                 return 0;
1331         }
1332         }
1333         goto out;
1334  wheel: {
1335         // I am not quite sure if this is the correct place to put this,
1336         // but it will not cause any harm.
1337         // Patch from Mark Huang (markman@mit.edu) to make LyX recognise
1338         // button 4 and 5. This enables LyX use use the scrollwhell on
1339         // certain mice for something useful. (Lgb)
1340         // Added wheel acceleration detection code. (Rvdk)
1341         static Time lastTime = 0;
1342         int diff = ev->xbutton.time - lastTime;
1343         int scroll = int(1.0 + (4.0/(abs(diff)+1.0))*200.0);
1344         switch (button) {
1345         case 4:
1346                 ScrollUp(scroll);
1347                 break;
1348         case 5:
1349                 ScrollDown(scroll);
1350                 break;
1351         }
1352         lastTime = ev->xbutton.time;
1353         return 0;
1354         }
1355  out:
1356         last_click_x = x;
1357         last_click_y = y;
1358
1359         return 0;
1360 }
1361 #endif
1362
1363 #ifdef MOVE_TEXT
1364 int BufferView::WorkAreaButtonRelease(FL_OBJECT * ob, Window ,
1365                           int /*w*/, int /*h*/, XEvent * ev, void * /*d*/)
1366 {
1367         if (buffer_ == 0 || screen == 0) return 0;
1368
1369         int const x = ev->xbutton.x - ob->x;
1370         int const y = ev->xbutton.y - ob->y;
1371
1372         // If we hit an inset, we have the inset coordinates in these
1373         // and inset_hit points to the inset.  If we do not hit an
1374         // inset, inset_hit is 0, and inset_x == x, inset_y == y.
1375         int inset_x = x;
1376         int inset_y = y;
1377         Inset * inset_hit = checkInsetHit(inset_x, inset_y);
1378
1379         if (buffer_->the_locking_inset) {
1380                 // We are in inset locking mode.
1381
1382                 /* LyX does a kind of work-area grabbing for insets.
1383                    Only a ButtonPress Event outside the inset will
1384                    force a InsetUnlock. */
1385                 buffer_->the_locking_inset->
1386                         InsetButtonRelease(inset_x, inset_y,
1387                                            ev->xbutton.button);
1388                 return 0;
1389         }
1390
1391         selection_possible = false;
1392         if (text->cursor.par->table) {
1393                 int cell = text->
1394                         NumberOfCell(text->cursor.par,
1395                                      text->cursor.pos);
1396                 if (text->cursor.par->table->IsContRow(cell) &&
1397                     text->cursor.par->table->
1398                     CellHasContRow(text->cursor.par->table->
1399                                    GetCellAbove(cell))<0) {
1400                         text->CursorUp();
1401                 }
1402         }
1403
1404         if (ev->xbutton.button >= 2)
1405                 return 0;
1406
1407         // Make sure that the press was not far from the release
1408         if ((abs(last_click_x - x) >= 5) ||
1409             (abs(last_click_y - y) >= 5)) {
1410                 return 0;
1411         }
1412
1413         // Did we hit an editable inset?
1414         if (inset_hit != 0) {
1415                 // Inset like error, notes and figures
1416                 selection_possible = false;
1417 #ifdef WITH_WARNINGS
1418 #warning fix this proper in 0.13
1419 #endif
1420                 // Following a ref shouldn't issue
1421                 // a push on the undo-stack
1422                 // anylonger, now that we have
1423                 // keybindings for following
1424                 // references and returning from
1425                 // references.  IMHO though, it
1426                 // should be the inset's own business
1427                 // to push or not push on the undo
1428                 // stack. They don't *have* to
1429                 // alter the document...
1430                 // (Joacim)
1431                 // ...or maybe the SetCursorParUndo()
1432                 // below isn't necessary at all anylonger?
1433                 if (inset_hit->LyxCode() == Inset::REF_CODE) {
1434                         text->SetCursorParUndo();
1435                 }
1436
1437                 owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
1438                 inset_hit->Edit(inset_x, inset_y);
1439                 return 0;
1440         }
1441
1442         // check whether we want to open a float
1443         if (text) {
1444                 bool hit = false;
1445                 char c = ' ';
1446                 if (text->cursor.pos <
1447                     text->cursor.par->Last()) {
1448                         c = text->cursor.par->
1449                                 GetChar(text->cursor.pos);
1450                 }
1451                 if (c == LyXParagraph::META_FOOTNOTE
1452                     || c == LyXParagraph::META_MARGIN
1453                     || c == LyXParagraph::META_FIG
1454                     || c == LyXParagraph::META_TAB
1455                     || c == LyXParagraph::META_WIDE_FIG
1456                     || c == LyXParagraph::META_WIDE_TAB
1457                     || c == LyXParagraph::META_ALGORITHM){
1458                         hit = true;
1459                 } else if (text->cursor.pos - 1 >= 0) {
1460                         c = text->cursor.par->
1461                                 GetChar(text->cursor.pos - 1);
1462                         if (c == LyXParagraph::META_FOOTNOTE
1463                             || c == LyXParagraph::META_MARGIN
1464                             || c == LyXParagraph::META_FIG
1465                             || c == LyXParagraph::META_TAB
1466                             || c == LyXParagraph::META_WIDE_FIG
1467                             || c == LyXParagraph::META_WIDE_TAB
1468                             || c == LyXParagraph::META_ALGORITHM){
1469                                 // We are one step too far to the right
1470                                 text->CursorLeft();
1471                                 hit = true;
1472                         }
1473                 }
1474                 if (hit == true) {
1475                         ToggleFloat();
1476                         selection_possible = false;
1477                         return 0;
1478                 }
1479         }
1480
1481         // Do we want to close a float? (click on the float-label)
1482         if (text->cursor.row->par->footnoteflag ==
1483             LyXParagraph::OPEN_FOOTNOTE
1484             && text->cursor.pos == 0
1485             && text->cursor.row->previous &&
1486             text->cursor.row->previous->par->
1487             footnoteflag != LyXParagraph::OPEN_FOOTNOTE){
1488                 LyXFont font (LyXFont::ALL_SANE);
1489                 font.setSize(LyXFont::SIZE_SMALL);
1490
1491                 int box_x = 20; // LYX_PAPER_MARGIN;
1492                 box_x += font.textWidth("Mwide-figM", 10);
1493
1494                 int screen_first = screen->first;
1495
1496                 if (x < box_x
1497                     && y + screen_first > text->cursor.y -
1498                     text->cursor.row->baseline
1499                     && y + screen_first < text->cursor.y -
1500                     text->cursor.row->baseline
1501                     + font.maxAscent()*1.2 + font.maxDescent()*1.2) {
1502                         ToggleFloat();
1503                         selection_possible = false;
1504                         return 0;
1505                 }
1506         }
1507
1508         // Maybe we want to edit a bibitem ale970302
1509         if (text->cursor.par->bibkey && x < 20 +
1510             bibitemMaxWidth(textclasslist.TextClass(buffer_->
1511                                         params.textclass).defaultfont())) {
1512                 text->cursor.par->bibkey->Edit(0, 0);
1513         }
1514
1515         return 0;
1516 }
1517 #else
1518 int BufferView::WorkAreaButtonRelease(FL_OBJECT *ob, Window ,
1519                           int /*w*/, int /*h*/, XEvent *ev, void */*d*/)
1520 {
1521         if (buffer_ == 0 || screen == 0) return 0;
1522
1523         int const x = ev->xbutton.x - ob->x;
1524         int const y = ev->xbutton.y - ob->y;
1525
1526         // If we hit an inset, we have the inset coordinates in these
1527         // and inset_hit points to the inset.  If we do not hit an
1528         // inset, inset_hit is 0, and inset_x == x, inset_y == y.
1529         int inset_x = x;
1530         int inset_y = y;
1531         Inset * inset_hit = checkInsetHit(inset_x, inset_y);
1532
1533         if (buffer_->the_locking_inset) {
1534                 // We are in inset locking mode.
1535
1536                 /* LyX does a kind of work-area grabbing for insets.
1537                    Only a ButtonPress Event outside the inset will
1538                    force a InsetUnlock. */
1539                 buffer_->the_locking_inset->
1540                         InsetButtonRelease(inset_x, inset_y,
1541                                            ev->xbutton.button);
1542                 return 0;
1543         }
1544
1545         selection_possible = false;
1546         if (buffer_->text->cursor.par->table) {
1547                 int cell = buffer_->text->
1548                         NumberOfCell(buffer_->text->cursor.par,
1549                                      buffer_->text->cursor.pos);
1550                 if (buffer_->text->cursor.par->table->IsContRow(cell) &&
1551                     buffer_->text->cursor.par->table->
1552                     CellHasContRow(buffer_->text->cursor.par->table->
1553                                    GetCellAbove(cell))<0) {
1554                         buffer_->text->CursorUp();
1555                 }
1556         }
1557
1558         if (ev->xbutton.button >= 2)
1559                 return 0;
1560
1561         // Make sure that the press was not far from the release
1562         if ((abs(last_click_x - x) >= 5) ||
1563             (abs(last_click_y - y) >= 5)) {
1564                 return 0;
1565         }
1566
1567         // Did we hit an editable inset?
1568         if (inset_hit != 0) {
1569                 // Inset like error, notes and figures
1570                 selection_possible = false;
1571 #ifdef WITH_WARNINGS
1572 #warning fix this proper in 0.13
1573 #endif
1574                 // Following a ref shouldn't issue
1575                 // a push on the undo-stack
1576                 // anylonger, now that we have
1577                 // keybindings for following
1578                 // references and returning from
1579                 // references.  IMHO though, it
1580                 // should be the inset's own business
1581                 // to push or not push on the undo
1582                 // stack. They don't *have* to
1583                 // alter the document...
1584                 // (Joacim)
1585                 // ...or maybe the SetCursorParUndo()
1586                 // below isn't necessary at all anylonger?
1587                 if (inset_hit->LyxCode() == Inset::REF_CODE) {
1588                         buffer_->text->SetCursorParUndo();
1589                 }
1590
1591                 owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
1592                 inset_hit->Edit(inset_x, inset_y);
1593                 return 0;
1594         }
1595
1596         // check whether we want to open a float
1597         if (buffer_->text) {
1598                 bool hit = false;
1599                 char c = ' ';
1600                 if (buffer_->text->cursor.pos <
1601                     buffer_->text->cursor.par->Last()) {
1602                         c = buffer_->text->cursor.par->
1603                                 GetChar(buffer_->text->cursor.pos);
1604                 }
1605                 if (c == LyXParagraph::META_FOOTNOTE
1606                     || c == LyXParagraph::META_MARGIN
1607                     || c == LyXParagraph::META_FIG
1608                     || c == LyXParagraph::META_TAB
1609                     || c == LyXParagraph::META_WIDE_FIG
1610                     || c == LyXParagraph::META_WIDE_TAB
1611                     || c == LyXParagraph::META_ALGORITHM){
1612                         hit = true;
1613                 } else if (buffer_->text->cursor.pos - 1 >= 0) {
1614                         c = buffer_->text->cursor.par->
1615                                 GetChar(buffer_->text->cursor.pos - 1);
1616                         if (c == LyXParagraph::META_FOOTNOTE
1617                             || c == LyXParagraph::META_MARGIN
1618                             || c == LyXParagraph::META_FIG
1619                             || c == LyXParagraph::META_TAB
1620                             || c == LyXParagraph::META_WIDE_FIG
1621                             || c == LyXParagraph::META_WIDE_TAB
1622                             || c == LyXParagraph::META_ALGORITHM){
1623                                 // We are one step too far to the right
1624                                 buffer_->text->CursorLeft();
1625                                 hit = true;
1626                         }
1627                 }
1628                 if (hit == true) {
1629                         ToggleFloat();
1630                         selection_possible = false;
1631                         return 0;
1632                 }
1633         }
1634
1635         // Do we want to close a float? (click on the float-label)
1636         if (buffer_->text->cursor.row->par->footnoteflag ==
1637             LyXParagraph::OPEN_FOOTNOTE
1638             && buffer_->text->cursor.pos == 0
1639             && buffer_->text->cursor.row->previous &&
1640             buffer_->text->cursor.row->previous->par->
1641             footnoteflag != LyXParagraph::OPEN_FOOTNOTE){
1642                 LyXFont font (LyXFont::ALL_SANE);
1643                 font.setSize(LyXFont::SIZE_SMALL);
1644
1645                 int box_x = 20; // LYX_PAPER_MARGIN;
1646                 box_x += font.textWidth("Mwide-figM", 10);
1647
1648                 int screen_first = screen->first;
1649
1650                 if (x < box_x
1651                     && y + screen_first > buffer_->text->cursor.y -
1652                     buffer_->text->cursor.row->baseline
1653                     && y + screen_first < buffer_->text->cursor.y -
1654                     buffer_->text->cursor.row->baseline
1655                     + font.maxAscent()*1.2 + font.maxDescent()*1.2) {
1656                         ToggleFloat();
1657                         selection_possible = false;
1658                         return 0;
1659                 }
1660         }
1661
1662         // Maybe we want to edit a bibitem ale970302
1663         if (buffer_->text->cursor.par->bibkey && x < 20 +
1664             bibitemMaxWidth(textclasslist.TextClass(buffer_->
1665                                         params.textclass).defaultfont())) {
1666                 buffer_->text->cursor.par->bibkey->Edit(0, 0);
1667         }
1668
1669         return 0;
1670 }
1671 #endif
1672
1673 /*
1674  * Returns an inset if inset was hit. 0 otherwise.
1675  * If hit, the coordinates are changed relative to the inset.
1676  * Otherwise coordinates are not changed, and false is returned.
1677  */
1678 #ifdef MOVE_TEXT
1679 Inset * BufferView::checkInsetHit(int & x, int & y)
1680 {
1681         if (!getScreen())
1682                 return 0;
1683
1684         int y_tmp = y + getScreen()->first;
1685
1686         LyXCursor cursor = text->cursor;
1687         if (cursor.pos < cursor.par->Last()
1688             && cursor.par->GetChar(cursor.pos) == LyXParagraph::META_INSET
1689             && cursor.par->GetInset(cursor.pos)
1690             && cursor.par->GetInset(cursor.pos)->Editable()) {
1691
1692                 // Check whether the inset really was hit
1693                 Inset * tmpinset = cursor.par->GetInset(cursor.pos);
1694                 LyXFont font = text->GetFont(cursor.par, cursor.pos);
1695                 if (x > cursor.x
1696                     && x < cursor.x + tmpinset->Width(font)
1697                     && y_tmp > cursor.y - tmpinset->Ascent(font)
1698                     && y_tmp < cursor.y + tmpinset->Descent(font)) {
1699                         x = x - cursor.x;
1700                         // The origin of an inset is on the baseline
1701                         y = y_tmp - (cursor.y);
1702                         return tmpinset;
1703                 }
1704         } else if (cursor.pos - 1 >= 0
1705                    && cursor.par->GetChar(cursor.pos - 1) == LyXParagraph::META_INSET
1706                    && cursor.par->GetInset(cursor.pos - 1)
1707                    && cursor.par->GetInset(cursor.pos - 1)->Editable()) {
1708                 text->CursorLeft();
1709                 Inset * result = checkInsetHit(x, y);
1710                 if (result == 0) {
1711                         text->CursorRight();
1712                         return 0;
1713                 } else {
1714                         return result;
1715                 }
1716         }
1717         return 0;
1718 }
1719 #else
1720 Inset * BufferView::checkInsetHit(int & x, int & y)
1721 {
1722         if (!getScreen())
1723                 return 0;
1724
1725         int y_tmp = y + getScreen()->first;
1726
1727         LyXCursor cursor = buffer_->text->cursor;
1728         if (cursor.pos < cursor.par->Last()
1729             && cursor.par->GetChar(cursor.pos) == LyXParagraph::META_INSET
1730             && cursor.par->GetInset(cursor.pos)
1731             && cursor.par->GetInset(cursor.pos)->Editable()) {
1732
1733                 // Check whether the inset really was hit
1734                 Inset * tmpinset = cursor.par->GetInset(cursor.pos);
1735                 LyXFont font = buffer_->text->GetFont(cursor.par, cursor.pos);
1736                 if (x > cursor.x
1737                     && x < cursor.x + tmpinset->Width(font)
1738                     && y_tmp > cursor.y - tmpinset->Ascent(font)
1739                     && y_tmp < cursor.y + tmpinset->Descent(font)) {
1740                         x = x - cursor.x;
1741                         // The origin of an inset is on the baseline
1742                         y = y_tmp - (cursor.y);
1743                         return tmpinset;
1744                 }
1745         } else if (cursor.pos - 1 >= 0
1746                    && cursor.par->GetChar(cursor.pos - 1) == LyXParagraph::META_INSET
1747                    && cursor.par->GetInset(cursor.pos - 1)
1748                    && cursor.par->GetInset(cursor.pos - 1)->Editable()) {
1749                 buffer_->text->CursorLeft();
1750                 Inset * result = checkInsetHit(x, y);
1751                 if (result == 0) {
1752                         buffer_->text->CursorRight();
1753                         return 0;
1754                 } else {
1755                         return result;
1756                 }
1757         }
1758         return 0;
1759 }
1760 #endif
1761
1762 int BufferView::workAreaExpose()
1763 {
1764         if (!work_area || !work_area->form->visible)
1765                 return 1;
1766
1767         // this is a hack to ensure that we only call this through
1768         // BufferView::redraw().
1769         if (!lgb_hack) {
1770                 redraw();
1771         }
1772
1773         static int work_area_width = work_area->w;
1774         static int work_area_height = work_area->h;
1775
1776         bool widthChange = work_area->w != work_area_width;
1777         bool heightChange = work_area->h != work_area_height;
1778
1779         // update from work area
1780         work_area_width = work_area->w;
1781         work_area_height = work_area->h;
1782         if (buffer_ != 0) {
1783                 if (widthChange) {
1784                         // All buffers need a resize
1785                         bufferlist.resize();
1786                 } else if (heightChange) {
1787                         // Rebuild image of current screen
1788                         updateScreen();
1789                         // fitCursor() ensures we don't jump back
1790                         // to the start of the document on vertical
1791                         // resize
1792                         fitCursor();
1793
1794                         // The main window size has changed, repaint most stuff
1795                         redraw();
1796                         // ...including the minibuffer
1797                         owner_->getMiniBuffer()->Init();
1798
1799                 } else if (screen) screen->Redraw();
1800         } else {
1801                 // Grey box when we don't have a buffer
1802                 fl_winset(FL_ObjWin(work_area));
1803                 fl_rectangle(1, work_area->x, work_area->y,
1804                              work_area->w, work_area->h, FL_GRAY63);
1805         }
1806
1807         // always make sure that the scrollbar is sane.
1808         updateScrollbar();
1809         owner_->updateLayoutChoice();
1810         return 1;
1811 }
1812
1813
1814 // Callback for cursor timer
1815 void BufferView::CursorToggleCB(FL_OBJECT * ob, long)
1816 {
1817         BufferView *view = static_cast<BufferView*>(ob->u_vdata);
1818
1819         /* quite a nice place for asyncron Inset updating, isn't it? */
1820         // actually no! This is run even if no buffer exist... so (Lgb)
1821         if (view && !view->buffer_) {
1822                 goto set_timer_and_return;
1823         }
1824
1825         // NOTE:
1826         // On my quest to solve the gs rendre hangups I am now
1827         // disabling the SIGHUP completely, and will do a wait
1828         // now and then instead. If the guess that xforms somehow
1829         // destroys something is true, this is likely (hopefully)
1830         // to solve the problem...at least I hope so. Lgb
1831
1832         // ...Ok this seems to work...at least it does not make things
1833         // worse so far. However I still see gs processes that hangs.
1834         // I would really like to know _why_ they are hanging. Anyway
1835         // the solution without the SIGCHLD handler seems to be easier
1836         // to debug.
1837
1838         // When attaching gdb to a a running gs that hangs it shows
1839         // that it is waiting for input(?) Is it possible for us to
1840         // provide that input somehow? Or figure what it is expecing
1841         // to read?
1842
1843         // One solution is to, after some time, look if there are some
1844         // old gs processes still running and if there are: kill them
1845         // and re render.
1846
1847         // Another solution is to provide the user an option to rerender
1848         // a picture. This would, for the picture in question, check if
1849         // there is a gs running for it, if so kill it, and start a new
1850         // rendering process.
1851
1852         // these comments posted to lyx@via
1853         {
1854         int status = 1;
1855         int pid = waitpid((pid_t)0, &status, WNOHANG);
1856         if (pid == -1) // error find out what is wrong
1857                 ; // ignore it for now.
1858         else if (pid > 0)
1859                 sigchldhandler(pid, &status);
1860         }
1861         if (InsetUpdateList)
1862                 UpdateInsetUpdateList();
1863
1864         if (view && !view->screen){
1865                 goto set_timer_and_return;
1866         }
1867
1868         if (view->lyx_focus && view->work_area_focus) {
1869                 if (!view->buffer_->the_locking_inset){
1870                         view->screen->CursorToggle();
1871                 } else {
1872                         view->buffer_->the_locking_inset->
1873                                 ToggleInsetCursor();
1874                 }
1875                 goto set_timer_and_return;
1876         } else {
1877                 // Make sure that the cursor is visible.
1878                 if (!view->buffer_->the_locking_inset){
1879                         view->screen->ShowCursor();
1880                 } else {
1881                         if (!view->buffer_->the_locking_inset->isCursorVisible())
1882                                 view->buffer_->the_locking_inset->
1883                                         ToggleInsetCursor();
1884                 }
1885
1886                 // This is only run when work_area_focus or lyx_focus is false.
1887                 Window tmpwin;
1888                 int tmp;
1889                 XGetInputFocus(fl_display, &tmpwin, &tmp);
1890                 if (lyxerr.debugging()) {
1891                         lyxerr << "tmpwin: " << tmpwin
1892                                << "\nwindow: " << view->owner_->getForm()->window
1893                                << "\nwork_area_focus: " << view->work_area_focus
1894                                << "\nlyx_focus      : " << view->lyx_focus
1895                                << endl;
1896                 }
1897                 if (tmpwin != view->owner_->getForm()->window) {
1898                         view->lyx_focus = false;
1899                         goto skip_timer;
1900                 } else {
1901                         view->lyx_focus = true;
1902                         if (!view->work_area_focus)
1903                                 goto skip_timer;
1904                         else
1905                                 goto set_timer_and_return;
1906                 }
1907         }
1908
1909   set_timer_and_return:
1910         fl_set_timer(ob, 0.4);
1911   skip_timer:
1912         return;
1913 }
1914
1915
1916 int BufferView::WorkAreaSelectionNotify(FL_OBJECT *, Window win,
1917                             int /*w*/, int /*h*/, XEvent *event, void */*d*/)
1918 {
1919         if (buffer_ == 0) return 0;
1920         if (event->type != SelectionNotify)
1921                 return 0;
1922
1923         Atom tmpatom;
1924         unsigned long ul1;
1925         unsigned long ul2;
1926         unsigned char * uc = 0;
1927         int tmpint;
1928         screen->HideCursor();
1929         BeforeChange();
1930         if (event->xselection.type == XA_STRING
1931             && event->xselection.property) {
1932
1933                 if (XGetWindowProperty(
1934                         fl_display            /* display */,
1935                         win /* w */,
1936                         event->xselection.property        /* property */,
1937                         0                /* long_offset */,
1938                         0                /* long_length */,
1939                         false                /* delete */,
1940                         XA_STRING                /* req_type */,
1941                         &tmpatom               /* actual_type_return */,
1942                         &tmpint                /* actual_format_return */,
1943                         &ul1      /* nitems_return */,
1944                         &ul2      /* bytes_after_return */,
1945                         &uc     /* prop_return */
1946                         ) != Success) {
1947                         return 0;
1948                 }
1949                 XFlush(fl_display);
1950
1951                 if (uc){
1952                         free(uc);
1953                         uc = 0;
1954                 }
1955
1956                 if (XGetWindowProperty(
1957                         fl_display           /* display */,
1958                         win              /* w */,
1959                         event->xselection.property           /* property */,
1960                         0                /* long_offset */,
1961                         ul2/4+1                /* long_length */,
1962                         True                /* delete */,
1963                         XA_STRING                /* req_type */,
1964                         &tmpatom               /* actual_type_return */,
1965                         &tmpint                /* actual_format_return */,
1966                         &ul1      /* nitems_return */,
1967                         &ul2      /* bytes_after_return */,
1968                         &uc     /* prop_return */
1969                         ) != Success) {
1970                         return 0;
1971                 }
1972                 XFlush(fl_display);
1973
1974                 if (uc){
1975 #ifdef MOVE_TEXT
1976                         if (!ascii_type) {
1977                                 text->InsertStringA(reinterpret_cast<char*>(uc));
1978                         } else {
1979                                 text->InsertStringB(reinterpret_cast<char*>(uc));
1980                         }
1981 #else
1982                         if (!ascii_type) {
1983                                 buffer_->text->
1984                                         InsertStringA(reinterpret_cast<char*>(uc));
1985                         } else {
1986                                 buffer_->text->
1987                                         InsertStringB(reinterpret_cast<char*>(uc));
1988                         }
1989 #endif
1990                         free(uc);
1991                         uc = 0;
1992                 }
1993
1994 #ifdef MOVE_TEXT
1995                 update(1);
1996 #else
1997                 buffer_->update(1);
1998 #endif
1999         }
2000         return 0;
2001 }
2002
2003
2004 #ifdef MOVE_TEXT
2005 void BufferView::cursorPrevious()
2006 {
2007         if (!text->cursor.row->previous) return;
2008
2009         long y = getScreen()->first;
2010         Row * cursorrow = text->cursor.row;
2011         text->SetCursorFromCoordinates(text->cursor.x_fix, y);
2012         text->FinishUndo();
2013         // this is to allow jumping over large insets
2014         if ((cursorrow == text->cursor.row))
2015                 text->CursorUp();
2016
2017         if (text->cursor.row->height < work_area->h)
2018                 getScreen()->Draw(text->cursor.y
2019                                   - text->cursor.row->baseline
2020                                   + text->cursor.row->height
2021                                   - work_area->h +1 );
2022 }
2023
2024
2025 void BufferView::cursorNext()
2026 {
2027         if (!text->cursor.row->next) return;
2028
2029         long y = getScreen()->first;
2030         text->GetRowNearY(y);
2031         Row * cursorrow = text->cursor.row;
2032         text->SetCursorFromCoordinates(text->cursor.x_fix, y + work_area->h);
2033         text->FinishUndo();
2034         /* this is to allow jumping over large insets */
2035         if ((cursorrow == text->cursor.row))
2036                 text->CursorDown();
2037
2038         if (text->cursor.row->height < work_area->h)
2039                 getScreen()->Draw(text->cursor.y
2040                                   - text->cursor.row->baseline);
2041 }
2042 #else
2043 void BufferView::cursorPrevious()
2044 {
2045         if (!buffer()->text->cursor.row->previous) return;
2046
2047         long y = getScreen()->first;
2048         Row * cursorrow = buffer()->text->cursor.row;
2049         buffer()->text->
2050           SetCursorFromCoordinates(buffer()->text->
2051                                    cursor.x_fix,
2052                                    y);
2053         buffer()->text->FinishUndo();
2054         // this is to allow jumping over large insets
2055         if ((cursorrow == buffer()->text->cursor.row))
2056           buffer()->text->CursorUp();
2057
2058         if (buffer()->text->cursor.row->height < work_area->h)
2059           getScreen()->Draw(buffer()->text->cursor.y
2060                             - buffer()->text->cursor.row->baseline
2061                             + buffer()->text->cursor.row->height
2062                             - work_area->h +1 );
2063 }
2064
2065
2066 void BufferView::cursorNext()
2067 {
2068         if (!buffer()->text->cursor.row->next) return;
2069
2070         long y = getScreen()->first;
2071         buffer()->text->GetRowNearY(y);
2072         Row * cursorrow = buffer()->text->cursor.row;
2073         buffer()->text->
2074                 SetCursorFromCoordinates(buffer()->text->
2075                                          cursor.x_fix,
2076                                          y + work_area->h);
2077         buffer()->text->FinishUndo();
2078         /* this is to allow jumping over large insets */
2079         if ((cursorrow == buffer()->text->cursor.row))
2080           buffer()->text->CursorDown();
2081
2082         if (buffer()->text->cursor.row->height < work_area->h)
2083           getScreen()->Draw(buffer()->text->cursor.y
2084                             - buffer()->text->cursor.row->baseline);
2085 }
2086 #endif
2087
2088 bool BufferView::available() const
2089 {
2090 #ifdef MOVE_TEXT
2091         if (buffer_ && text) return true;
2092 #else
2093         if (buffer_ && buffer_->text) return true;
2094 #endif
2095         return false;
2096 }
2097
2098
2099 void BufferView::savePosition()
2100 {
2101 #ifdef MOVE_TEXT
2102         backstack.push(buffer()->fileName(),
2103                         text->cursor.x,
2104                         text->cursor.y);
2105 #else
2106         backstack.push(buffer()->getFileName(),
2107                         buffer()->text->cursor.x,
2108                         buffer()->text->cursor.y);
2109 #endif
2110 }
2111
2112
2113 void BufferView::restorePosition()
2114 {
2115         if (backstack.empty()) return;
2116
2117         int  x, y;
2118         string fname = backstack.pop(&x, &y);
2119
2120         BeforeChange();
2121         Buffer * b = (bufferlist.exists(fname)) ? bufferlist.getBuffer(fname):
2122                 bufferlist.loadLyXFile(fname); // don't ask, just load it
2123         buffer(b);
2124 #ifdef MOVE_TEXT
2125         text->SetCursorFromCoordinates(x, y);
2126         update(0);
2127 #else
2128         buffer()->text->SetCursorFromCoordinates(x, y);
2129         buffer()->update(0);
2130 #endif
2131 }
2132
2133
2134 #ifdef MOVE_TEXT
2135 // candidate for move to BufferView
2136 void BufferView::update(signed char f)
2137 {
2138         owner()->updateLayoutChoice();
2139
2140         if (!text->selection && f > -3)
2141                 text->sel_cursor = text->cursor;
2142
2143         FreeUpdateTimer();
2144         text->FullRebreak();
2145
2146         update();
2147
2148         if (f != 3 && f != -3) {
2149                 fitCursor();
2150                 updateScrollbar();
2151         }
2152
2153         if (f == 1 || f == -1) {
2154                 if (buffer()->isLyxClean()) {
2155                         buffer()->markDirty();
2156                         owner()->getMiniBuffer()->setTimer(4);
2157                 } else {
2158                         buffer()->markDirty();
2159                 }
2160         }
2161 }
2162 #endif