src/richtext/richtextctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/richtext/richeditctrl.cpp
   3 // Purpose:     A rich edit control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextctrl.h"
  22 #include "wx/richtext/richtextstyles.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/wx.h"
  26     #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/textfile.h"
  30 #include "wx/ffile.h"
  31 #include "wx/filename.h"
  32 #include "wx/dcbuffer.h"
  33 #include "wx/arrimpl.cpp"
  34 #include "wx/fontenum.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/app.h"
  38 WX_CHECK_BUILD_OPTIONS("wxRichTextCtrl")
  39
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_CLICK)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_MIDDLE_CLICK)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RIGHT_CLICK)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_LEFT_DCLICK)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_RETURN)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CHARACTER)
  46 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_DELETE)
  47
  48 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACING)
  49 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_REPLACED)
  50 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGING)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLESHEET_CHANGED)
  52
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_INSERTED)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_CONTENT_DELETED)
  55 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_STYLE_CHANGED)
  56 DEFINE_EVENT_TYPE(wxEVT_COMMAND_RICHTEXT_SELECTION_CHANGED)
  57
  58 IMPLEMENT_CLASS( wxRichTextCtrl, wxControl )
  59
  60 IMPLEMENT_CLASS( wxRichTextEvent, wxNotifyEvent )
  61
  62 BEGIN_EVENT_TABLE( wxRichTextCtrl, wxControl )
  63     EVT_PAINT(wxRichTextCtrl::OnPaint)
  64     EVT_ERASE_BACKGROUND(wxRichTextCtrl::OnEraseBackground)
  65     EVT_IDLE(wxRichTextCtrl::OnIdle)
  66     EVT_SCROLLWIN(wxRichTextCtrl::OnScroll)
  67     EVT_LEFT_DOWN(wxRichTextCtrl::OnLeftClick)
  68     EVT_MOTION(wxRichTextCtrl::OnMoveMouse)
  69     EVT_LEFT_UP(wxRichTextCtrl::OnLeftUp)
  70     EVT_RIGHT_DOWN(wxRichTextCtrl::OnRightClick)
  71     EVT_MIDDLE_DOWN(wxRichTextCtrl::OnMiddleClick)
  72     EVT_LEFT_DCLICK(wxRichTextCtrl::OnLeftDClick)
  73     EVT_CHAR(wxRichTextCtrl::OnChar)
  74     EVT_SIZE(wxRichTextCtrl::OnSize)
  75     EVT_SET_FOCUS(wxRichTextCtrl::OnSetFocus)
  76     EVT_KILL_FOCUS(wxRichTextCtrl::OnKillFocus)
  77     EVT_MOUSE_CAPTURE_LOST(wxRichTextCtrl::OnCaptureLost)
  78     EVT_CONTEXT_MENU(wxRichTextCtrl::OnContextMenu)
  79
  80     EVT_MENU(wxID_UNDO, wxRichTextCtrl::OnUndo)
  81     EVT_UPDATE_UI(wxID_UNDO, wxRichTextCtrl::OnUpdateUndo)
  82
  83     EVT_MENU(wxID_REDO, wxRichTextCtrl::OnRedo)
  84     EVT_UPDATE_UI(wxID_REDO, wxRichTextCtrl::OnUpdateRedo)
  85
  86     EVT_MENU(wxID_COPY, wxRichTextCtrl::OnCopy)
  87     EVT_UPDATE_UI(wxID_COPY, wxRichTextCtrl::OnUpdateCopy)
  88
  89     EVT_MENU(wxID_PASTE, wxRichTextCtrl::OnPaste)
  90     EVT_UPDATE_UI(wxID_PASTE, wxRichTextCtrl::OnUpdatePaste)
  91
  92     EVT_MENU(wxID_CUT, wxRichTextCtrl::OnCut)
  93     EVT_UPDATE_UI(wxID_CUT, wxRichTextCtrl::OnUpdateCut)
  94
  95     EVT_MENU(wxID_CLEAR, wxRichTextCtrl::OnClear)
  96     EVT_UPDATE_UI(wxID_CLEAR, wxRichTextCtrl::OnUpdateClear)
  97
  98     EVT_MENU(wxID_SELECTALL, wxRichTextCtrl::OnSelectAll)
  99     EVT_UPDATE_UI(wxID_SELECTALL, wxRichTextCtrl::OnUpdateSelectAll)
 100 END_EVENT_TABLE()
 101
 102 /*!
 103  * wxRichTextCtrl
 104  */
 105
 106 wxArrayString wxRichTextCtrl::sm_availableFontNames;
 107
 108 wxRichTextCtrl::wxRichTextCtrl()
 109               : wxScrollHelper(this)
 110 {
 111     Init();
 112 }
 113
 114 wxRichTextCtrl::wxRichTextCtrl(wxWindow* parent,
 115                                wxWindowID id,
 116                                const wxString& value,
 117                                const wxPoint& pos,
 118                                const wxSize& size,
 119                                long style,
 120                                const wxValidator& validator,
 121                                const wxString& name)
 122               : wxScrollHelper(this)
 123 {
 124     Init();
 125     Create(parent, id, value, pos, size, style, validator, name);
 126 }
 127
 128 /// Creation
 129 bool wxRichTextCtrl::Create( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style,
 130                              const wxValidator& validator, const wxString& name)
 131 {
 132     if (!wxTextCtrlBase::Create(parent, id, pos, size,
 133                                 style|wxFULL_REPAINT_ON_RESIZE,
 134                                 validator, name))
 135         return false;
 136
 137     if (!GetFont().Ok())
 138     {
 139         SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 140     }
 141
 142     GetBuffer().Reset();
 143     GetBuffer().SetRichTextCtrl(this);
 144
 145     SetCaret(new wxCaret(this, wxRICHTEXT_DEFAULT_CARET_WIDTH, 16));
 146     GetCaret()->Show();
 147
 148     if (style & wxTE_READONLY)
 149         SetEditable(false);
 150
 151     // The base attributes must all have default values
 152     wxTextAttrEx attributes;
 153     attributes.SetFont(GetFont());
 154     attributes.SetTextColour(*wxBLACK);
 155     attributes.SetBackgroundColour(*wxWHITE);
 156     attributes.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
 157     attributes.SetLineSpacing(10);
 158     attributes.SetParagraphSpacingAfter(10);
 159     attributes.SetParagraphSpacingBefore(0);
 160     attributes.SetTextEffects(0);
 161     attributes.SetTextEffectFlags(wxTEXT_ATTR_EFFECT_STRIKETHROUGH|wxTEXT_ATTR_EFFECT_CAPITALS);
 162
 163     SetBasicStyle(attributes);
 164
 165     // The default attributes will be merged with base attributes, so
 166     // can be empty to begin with
 167     wxTextAttrEx defaultAttributes;
 168     SetDefaultStyle(defaultAttributes);
 169
 170     SetBackgroundColour(*wxWHITE);
 171     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 172
 173     // Tell the sizers to use the given or best size
 174     SetInitialSize(size);
 175
 176 #if wxRICHTEXT_BUFFERED_PAINTING
 177     // Create a buffer
 178     RecreateBuffer(size);
 179 #endif
 180
 181     m_textCursor = wxCursor(wxCURSOR_IBEAM);
 182     m_urlCursor = wxCursor(wxCURSOR_HAND);
 183
 184     SetCursor(m_textCursor);
 185
 186     if (!value.IsEmpty())
 187         SetValue(value);
 188
 189     GetBuffer().AddEventHandler(this);
 190
 191     return true;
 192 }
 193
 194 wxRichTextCtrl::~wxRichTextCtrl()
 195 {
 196     GetBuffer().RemoveEventHandler(this);
 197
 198     delete m_contextMenu;
 199 }
 200
 201 /// Member initialisation
 202 void wxRichTextCtrl::Init()
 203 {
 204     m_freezeCount = 0;
 205     m_contextMenu = NULL;
 206     m_caret = NULL;
 207     m_caretPosition = -1;
 208     m_selectionRange.SetRange(-2, -2);
 209     m_selectionAnchor = -2;
 210     m_editable = true;
 211     m_caretAtLineStart = false;
 212     m_dragging = false;
 213     m_fullLayoutRequired = false;
 214     m_fullLayoutTime = 0;
 215     m_fullLayoutSavedPosition = 0;
 216     m_delayedLayoutThreshold = wxRICHTEXT_DEFAULT_DELAYED_LAYOUT_THRESHOLD;
 217     m_caretPositionForDefaultStyle = -2;
 218 }
 219
 220 /// Call Freeze to prevent refresh
 221 void wxRichTextCtrl::Freeze()
 222 {
 223     m_freezeCount ++;
 224 }
 225
 226 /// Call Thaw to refresh
 227 void wxRichTextCtrl::Thaw()
 228 {
 229     m_freezeCount --;
 230
 231     if (m_freezeCount == 0)
 232     {
 233         SetupScrollbars();
 234         Refresh(false);
 235     }
 236 }
 237
 238 /// Clear all text
 239 void wxRichTextCtrl::Clear()
 240 {
 241     m_buffer.ResetAndClearCommands();
 242     m_buffer.SetDirty(true);
 243     m_caretPosition = -1;
 244     m_caretPositionForDefaultStyle = -2;
 245     m_caretAtLineStart = false;
 246     m_selectionRange.SetRange(-2, -2);
 247
 248     SetScrollbars(0, 0, 0, 0, 0, 0);
 249
 250     if (m_freezeCount == 0)
 251     {
 252         SetupScrollbars();
 253         Refresh(false);
 254     }
 255     SendTextUpdatedEvent();
 256 }
 257
 258 /// Painting
 259 void wxRichTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 260 {
 261     if (GetCaret() && GetCaret()->IsVisible())
 262         GetCaret()->Hide();
 263
 264     {
 265 #if wxRICHTEXT_BUFFERED_PAINTING
 266         wxBufferedPaintDC dc(this, m_bufferBitmap);
 267 #else
 268         wxPaintDC dc(this);
 269 #endif
 270         PrepareDC(dc);
 271
 272         if (m_freezeCount > 0)
 273             return;
 274
 275         dc.SetFont(GetFont());
 276
 277         // Paint the background
 278         PaintBackground(dc);
 279
 280         // wxRect drawingArea(GetLogicalPoint(wxPoint(0, 0)), GetClientSize());
 281
 282         wxRect drawingArea(GetUpdateRegion().GetBox());
 283         drawingArea.SetPosition(GetLogicalPoint(drawingArea.GetPosition()));
 284
 285         wxRect availableSpace(GetClientSize());
 286         if (GetBuffer().GetDirty())
 287         {
 288             GetBuffer().Layout(dc, availableSpace, wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT);
 289             GetBuffer().SetDirty(false);
 290             SetupScrollbars();
 291         }
 292
 293         GetBuffer().Draw(dc, GetBuffer().GetRange(), GetInternalSelectionRange(), drawingArea, 0 /* descent */, 0 /* flags */);
 294     }
 295
 296     if (GetCaret() && !GetCaret()->IsVisible())
 297         GetCaret()->Show();
 298
 299     PositionCaret();
 300 }
 301
 302 // Empty implementation, to prevent flicker
 303 void wxRichTextCtrl::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 304 {
 305 }
 306
 307 void wxRichTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
 308 {
 309     if (GetCaret())
 310     {
 311         if (!GetCaret()->IsVisible())
 312             GetCaret()->Show();
 313         PositionCaret();
 314     }
 315
 316     // if (!IsFrozen())
 317     //    Refresh(false);
 318 }
 319
 320 void wxRichTextCtrl::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 321 {
 322     if (GetCaret() && GetCaret()->IsVisible())
 323         GetCaret()->Hide();
 324
 325     // if (!IsFrozen())
 326     //    Refresh(false);
 327 }
 328
 329 void wxRichTextCtrl::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
 330 {
 331     m_dragging = false;
 332 }
 333
 334 /// Left-click
 335 void wxRichTextCtrl::OnLeftClick(wxMouseEvent& event)
 336 {
 337     SetFocus();
 338
 339     wxClientDC dc(this);
 340     PrepareDC(dc);
 341     dc.SetFont(GetFont());
 342
 343     long position = 0;
 344     int hit = GetBuffer().HitTest(dc, event.GetLogicalPosition(dc), position);
 345
 346     if (hit != wxRICHTEXT_HITTEST_NONE)
 347     {
 348         m_dragStart = event.GetLogicalPosition(dc);
 349         m_dragging = true;
 350         CaptureMouse();
 351
 352         SelectNone();
 353
 354         bool caretAtLineStart = false;
 355
 356         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 357         {
 358             // If we're at the start of a line (but not first in para)
 359             // then we should keep the caret showing at the start of the line
 360             // by showing the m_caretAtLineStart flag.
 361             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 362             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 363
 364             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 365                 caretAtLineStart = true;
 366             position --;
 367         }
 368
 369         MoveCaret(position, caretAtLineStart);
 370         SetDefaultStyleToCursorStyle();
 371     }
 372
 373     event.Skip();
 374 }
 375
 376 /// Left-up
 377 void wxRichTextCtrl::OnLeftUp(wxMouseEvent& event)
 378 {
 379     if (m_dragging)
 380     {
 381         m_dragging = false;
 382         if (GetCapture() == this)
 383             ReleaseMouse();
 384
 385         // See if we clicked on a URL
 386         wxClientDC dc(this);
 387         PrepareDC(dc);
 388         dc.SetFont(GetFont());
 389
 390         long position = 0;
 391         wxPoint logicalPt = event.GetLogicalPosition(dc);
 392         int hit = GetBuffer().HitTest(dc, logicalPt, position);
 393
 394         if (hit != wxRICHTEXT_HITTEST_NONE)
 395         {
 396             wxTextAttrEx attr;
 397             if (GetStyle(position, attr))
 398             {
 399                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 400                 {
 401                     wxString urlTarget = attr.GetURL();
 402                     if (!urlTarget.IsEmpty())
 403                     {
 404                         wxMouseEvent mouseEvent(event);
 405
 406                         long startPos = 0, endPos = 0;
 407                         wxRichTextObject* obj = GetBuffer().GetLeafObjectAtPosition(position);
 408                         if (obj)
 409                         {
 410                             startPos = obj->GetRange().GetStart();
 411                             endPos = obj->GetRange().GetEnd();
 412                         }
 413
 414                         wxTextUrlEvent urlEvent(GetId(), mouseEvent, startPos, endPos);
 415                         InitCommandEvent(urlEvent);
 416
 417                         urlEvent.SetString(urlTarget);
 418
 419                         GetEventHandler()->ProcessEvent(urlEvent);
 420                     }
 421                 }
 422             }
 423         }
 424     }
 425 }
 426
 427 /// Left-click
 428 void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
 429 {
 430     wxClientDC dc(this);
 431     PrepareDC(dc);
 432     dc.SetFont(GetFont());
 433
 434     long position = 0;
 435     wxPoint logicalPt = event.GetLogicalPosition(dc);
 436     int hit = GetBuffer().HitTest(dc, logicalPt, position);
 437
 438     // See if we need to change the cursor
 439
 440     {
 441         if (hit != wxRICHTEXT_HITTEST_NONE)
 442         {
 443             wxTextAttrEx attr;
 444             if (GetStyle(position, attr))
 445             {
 446                 if (attr.HasFlag(wxTEXT_ATTR_URL))
 447                 {
 448                     SetCursor(m_urlCursor);
 449                 }
 450                 else if (!attr.HasFlag(wxTEXT_ATTR_URL))
 451                 {
 452                     SetCursor(m_textCursor);
 453                 }
 454             }
 455         }
 456     }
 457
 458     if (!event.Dragging())
 459     {
 460         event.Skip();
 461         return;
 462     }
 463
 464     if (m_dragging && hit != wxRICHTEXT_HITTEST_NONE)
 465     {
 466         // TODO: test closeness
 467
 468         bool caretAtLineStart = false;
 469
 470         if (hit & wxRICHTEXT_HITTEST_BEFORE)
 471         {
 472             // If we're at the start of a line (but not first in para)
 473             // then we should keep the caret showing at the start of the line
 474             // by showing the m_caretAtLineStart flag.
 475             wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
 476             wxRichTextLine* line = GetBuffer().GetLineAtPosition(position);
 477
 478             if (line && para && line->GetAbsoluteRange().GetStart() == position && para->GetRange().GetStart() != position)
 479                 caretAtLineStart = true;
 480             position --;
 481         }
 482
 483         if (m_caretPosition != position)
 484         {
 485             bool extendSel = ExtendSelection(m_caretPosition, position, wxRICHTEXT_SHIFT_DOWN);
 486
 487             MoveCaret(position, caretAtLineStart);
 488             SetDefaultStyleToCursorStyle();
 489
 490             if (extendSel)
 491                 Refresh(false);
 492         }
 493     }
 494 }
 495
 496 /// Right-click
 497 void wxRichTextCtrl::OnRightClick(wxMouseEvent& event)
 498 {
 499     SetFocus();
 500     event.Skip();
 501 }
 502
 503 /// Left-double-click
 504 void wxRichTextCtrl::OnLeftDClick(wxMouseEvent& event)
 505 {
 506     SelectWord(GetCaretPosition()+1);
 507     event.Skip();
 508 }
 509
 510 /// Middle-click
 511 void wxRichTextCtrl::OnMiddleClick(wxMouseEvent& event)
 512 {
 513     event.Skip();
 514 }
 515
 516 /// Key press
 517 void wxRichTextCtrl::OnChar(wxKeyEvent& event)
 518 {
 519     int flags = 0;
 520     if (event.CmdDown())
 521         flags |= wxRICHTEXT_CTRL_DOWN;
 522     if (event.ShiftDown())
 523         flags |= wxRICHTEXT_SHIFT_DOWN;
 524     if (event.AltDown())
 525         flags |= wxRICHTEXT_ALT_DOWN;
 526
 527     if (event.GetKeyCode() == WXK_LEFT ||
 528         event.GetKeyCode() == WXK_RIGHT ||
 529         event.GetKeyCode() == WXK_UP ||
 530         event.GetKeyCode() == WXK_DOWN ||
 531         event.GetKeyCode() == WXK_HOME ||
 532         event.GetKeyCode() == WXK_PAGEUP ||
 533         event.GetKeyCode() == WXK_PAGEDOWN ||
 534         event.GetKeyCode() == WXK_END ||
 535
 536         event.GetKeyCode() == WXK_NUMPAD_LEFT ||
 537         event.GetKeyCode() == WXK_NUMPAD_RIGHT ||
 538         event.GetKeyCode() == WXK_NUMPAD_UP ||
 539         event.GetKeyCode() == WXK_NUMPAD_DOWN ||
 540         event.GetKeyCode() == WXK_NUMPAD_HOME ||
 541         event.GetKeyCode() == WXK_NUMPAD_PAGEUP ||
 542         event.GetKeyCode() == WXK_NUMPAD_PAGEDOWN ||
 543         event.GetKeyCode() == WXK_NUMPAD_END)
 544     {
 545         KeyboardNavigate(event.GetKeyCode(), flags);
 546         return;
 547     }
 548
 549     // all the other keys modify the controls contents which shouldn't be
 550     // possible if we're read-only
 551     if ( !IsEditable() )
 552     {
 553         event.Skip();
 554         return;
 555     }
 556
 557     if (event.GetKeyCode() == WXK_RETURN)
 558     {
 559         BeginBatchUndo(_("Insert Text"));
 560
 561         long newPos = m_caretPosition;
 562
 563         DeleteSelectedContent(& newPos);
 564
 565         if (event.ShiftDown())
 566         {
 567             wxString text;
 568             text = wxRichTextLineBreakChar;
 569             GetBuffer().InsertTextWithUndo(newPos+1, text, this);
 570         }
 571         else
 572             GetBuffer().InsertNewlineWithUndo(newPos+1, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
 573
 574         EndBatchUndo();
 575         SetDefaultStyleToCursorStyle();
 576
 577         ScrollIntoView(m_caretPosition, WXK_RIGHT);
 578
 579         wxRichTextEvent cmdEvent(
 580             wxEVT_COMMAND_RICHTEXT_RETURN,
 581             GetId());
 582         cmdEvent.SetEventObject(this);
 583         cmdEvent.SetFlags(flags);
 584         cmdEvent.SetPosition(newPos+1);
 585
 586         if (!GetEventHandler()->ProcessEvent(cmdEvent))
 587         {
 588             // Generate conventional event
 589             wxCommandEvent textEvent(wxEVT_COMMAND_TEXT_ENTER, GetId());
 590             InitCommandEvent(textEvent);
 591
 592             GetEventHandler()->ProcessEvent(textEvent);
 593         }
 594         Update();
 595     }
 596     else if (event.GetKeyCode() == WXK_BACK)
 597     {
 598         BeginBatchUndo(_("Delete Text"));
 599
 600         // Submit range in character positions, which are greater than caret positions,
 601         // so subtract 1 for deleted character and add 1 for conversion to character position.
 602         if (m_caretPosition > -1 && !HasSelection())
 603         {
 604             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition, m_caretPosition), this);
 605         }
 606         else
 607             DeleteSelectedContent();
 608
 609         EndBatchUndo();
 610
 611         if (GetLastPosition() == -1)
 612         {
 613             GetBuffer().Reset();
 614
 615             m_caretPosition = -1;
 616             PositionCaret();
 617             SetDefaultStyleToCursorStyle();
 618         }
 619
 620         ScrollIntoView(m_caretPosition, WXK_LEFT);
 621
 622         wxRichTextEvent cmdEvent(
 623             wxEVT_COMMAND_RICHTEXT_DELETE,
 624             GetId());
 625         cmdEvent.SetEventObject(this);
 626         cmdEvent.SetFlags(flags);
 627         cmdEvent.SetPosition(m_caretPosition+1);
 628         GetEventHandler()->ProcessEvent(cmdEvent);
 629
 630         Update();
 631     }
 632     else if (event.GetKeyCode() == WXK_DELETE)
 633     {
 634         BeginBatchUndo(_("Delete Text"));
 635
 636         // Submit range in character positions, which are greater than caret positions,
 637         if (m_caretPosition < GetBuffer().GetRange().GetEnd()+1 && !HasSelection())
 638         {
 639             GetBuffer().DeleteRangeWithUndo(wxRichTextRange(m_caretPosition+1, m_caretPosition+1), this);
 640         }
 641         else
 642             DeleteSelectedContent();
 643
 644         EndBatchUndo();
 645
 646         if (GetLastPosition() == -1)
 647         {
 648             GetBuffer().Reset();
 649
 650             m_caretPosition = -1;
 651             PositionCaret();
 652             SetDefaultStyleToCursorStyle();
 653         }
 654
 655         wxRichTextEvent cmdEvent(
 656             wxEVT_COMMAND_RICHTEXT_DELETE,
 657             GetId());
 658         cmdEvent.SetEventObject(this);
 659         cmdEvent.SetFlags(flags);
 660         cmdEvent.SetPosition(m_caretPosition+1);
 661         GetEventHandler()->ProcessEvent(cmdEvent);
 662
 663         Update();
 664     }
 665     else
 666     {
 667         long keycode = event.GetKeyCode();
 668         switch ( keycode )
 669         {
 670             case WXK_ESCAPE:
 671             // case WXK_SPACE:
 672             case WXK_DELETE:
 673             case WXK_START:
 674             case WXK_LBUTTON:
 675             case WXK_RBUTTON:
 676             case WXK_CANCEL:
 677             case WXK_MBUTTON:
 678             case WXK_CLEAR:
 679             case WXK_SHIFT:
 680             case WXK_ALT:
 681             case WXK_CONTROL:
 682             case WXK_MENU:
 683             case WXK_PAUSE:
 684             case WXK_CAPITAL:
 685             case WXK_END:
 686             case WXK_HOME:
 687             case WXK_LEFT:
 688             case WXK_UP:
 689             case WXK_RIGHT:
 690             case WXK_DOWN:
 691             case WXK_SELECT:
 692             case WXK_PRINT:
 693             case WXK_EXECUTE:
 694             case WXK_SNAPSHOT:
 695             case WXK_INSERT:
 696             case WXK_HELP:
 697             case WXK_NUMPAD0:
 698             case WXK_NUMPAD1:
 699             case WXK_NUMPAD2:
 700             case WXK_NUMPAD3:
 701             case WXK_NUMPAD4:
 702             case WXK_NUMPAD5:
 703             case WXK_NUMPAD6:
 704             case WXK_NUMPAD7:
 705             case WXK_NUMPAD8:
 706             case WXK_NUMPAD9:
 707             case WXK_MULTIPLY:
 708             case WXK_ADD:
 709             case WXK_SEPARATOR:
 710             case WXK_SUBTRACT:
 711             case WXK_DECIMAL:
 712             case WXK_DIVIDE:
 713             case WXK_F1:
 714             case WXK_F2:
 715             case WXK_F3:
 716             case WXK_F4:
 717             case WXK_F5:
 718             case WXK_F6:
 719             case WXK_F7:
 720             case WXK_F8:
 721             case WXK_F9:
 722             case WXK_F10:
 723             case WXK_F11:
 724             case WXK_F12:
 725             case WXK_F13:
 726             case WXK_F14:
 727             case WXK_F15:
 728             case WXK_F16:
 729             case WXK_F17:
 730             case WXK_F18:
 731             case WXK_F19:
 732             case WXK_F20:
 733             case WXK_F21:
 734             case WXK_F22:
 735             case WXK_F23:
 736             case WXK_F24:
 737             case WXK_NUMLOCK:
 738             case WXK_SCROLL:
 739             case WXK_PAGEUP:
 740             case WXK_PAGEDOWN:
 741             case WXK_NUMPAD_SPACE:
 742             case WXK_NUMPAD_TAB:
 743             case WXK_NUMPAD_ENTER:
 744             case WXK_NUMPAD_F1:
 745             case WXK_NUMPAD_F2:
 746             case WXK_NUMPAD_F3:
 747             case WXK_NUMPAD_F4:
 748             case WXK_NUMPAD_HOME:
 749             case WXK_NUMPAD_LEFT:
 750             case WXK_NUMPAD_UP:
 751             case WXK_NUMPAD_RIGHT:
 752             case WXK_NUMPAD_DOWN:
 753             case WXK_NUMPAD_PAGEUP:
 754             case WXK_NUMPAD_PAGEDOWN:
 755             case WXK_NUMPAD_END:
 756             case WXK_NUMPAD_BEGIN:
 757             case WXK_NUMPAD_INSERT:
 758             case WXK_NUMPAD_DELETE:
 759             case WXK_NUMPAD_EQUAL:
 760             case WXK_NUMPAD_MULTIPLY:
 761             case WXK_NUMPAD_ADD:
 762             case WXK_NUMPAD_SEPARATOR:
 763             case WXK_NUMPAD_SUBTRACT:
 764             case WXK_NUMPAD_DECIMAL:
 765             {
 766                 event.Skip();
 767                 return;
 768             }
 769
 770             default:
 771             {
 772                 if (event.CmdDown() || event.AltDown())
 773                 {
 774                     event.Skip();
 775                     return;
 776                 }
 777
 778                 wxRichTextEvent cmdEvent(
 779                     wxEVT_COMMAND_RICHTEXT_CHARACTER,
 780                     GetId());
 781                 cmdEvent.SetEventObject(this);
 782                 cmdEvent.SetFlags(flags);
 783                 cmdEvent.SetCharacter((wxChar) keycode);
 784                 cmdEvent.SetPosition(m_caretPosition+1);
 785
 786                 if (keycode == wxT('\t'))
 787                 {
 788                     // See if we need to promote or demote the selection or paragraph at the cursor
 789                     // position, instead of inserting a tab.
 790                     long pos = GetAdjustedCaretPosition(GetCaretPosition());
 791                     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos);
 792                     if (para && para->GetRange().GetStart() == pos && para->GetAttributes().HasListStyleName())
 793                     {
 794                         wxRichTextRange range;
 795                         if (HasSelection())
 796                             range = GetSelectionRange();
 797                         else
 798                             range = para->GetRange().FromInternal();
 799
 800                         int promoteBy = event.ShiftDown() ? 1 : -1;
 801
 802                         PromoteList(promoteBy, range, NULL);
 803
 804                         GetEventHandler()->ProcessEvent(cmdEvent);
 805
 806                         return;
 807                     }
 808                 }
 809
 810                 BeginBatchUndo(_("Insert Text"));
 811
 812                 long newPos = m_caretPosition;
 813                 DeleteSelectedContent(& newPos);
 814
 815                 wxString str = (wxChar) event.GetKeyCode();
 816                 GetBuffer().InsertTextWithUndo(newPos+1, str, this, 0);
 817
 818                 EndBatchUndo();
 819
 820                 SetDefaultStyleToCursorStyle();
 821                 ScrollIntoView(m_caretPosition, WXK_RIGHT);
 822
 823                 GetEventHandler()->ProcessEvent(cmdEvent);
 824
 825                 Update();
 826             }
 827         }
 828     }
 829 }
 830
 831 /// Delete content if there is a selection, e.g. when pressing a key.
 832 bool wxRichTextCtrl::DeleteSelectedContent(long* newPos)
 833 {
 834     if (HasSelection())
 835     {
 836         long pos = m_selectionRange.GetStart();
 837         GetBuffer().DeleteRangeWithUndo(m_selectionRange, this);
 838         m_selectionRange.SetRange(-2, -2);
 839
 840         if (newPos)
 841             *newPos = pos-1;
 842         return true;
 843     }
 844     else
 845         return false;
 846 }
 847
 848 /// Keyboard navigation
 849
 850 /*
 851
 852 Left:       left one character
 853 Right:      right one character
 854 Up:         up one line
 855 Down:       down one line
 856 Ctrl-Left:  left one word
 857 Ctrl-Right: right one word
 858 Ctrl-Up:    previous paragraph start
 859 Ctrl-Down:  next start of paragraph
 860 Home:       start of line
 861 End:        end of line
 862 Ctrl-Home:  start of document
 863 Ctrl-End:   end of document
 864 Page-Up:    Up a screen
 865 Page-Down:  Down a screen
 866
 867 Maybe:
 868
 869 Ctrl-Alt-PgUp: Start of window
 870 Ctrl-Alt-PgDn: End of window
 871 F8:         Start selection mode
 872 Esc:        End selection mode
 873
 874 Adding Shift does the above but starts/extends selection.
 875
 876
 877  */
 878
 879 bool wxRichTextCtrl::KeyboardNavigate(int keyCode, int flags)
 880 {
 881     bool success = false;
 882
 883     if (keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_RIGHT)
 884     {
 885         if (flags & wxRICHTEXT_CTRL_DOWN)
 886             success = WordRight(1, flags);
 887         else
 888             success = MoveRight(1, flags);
 889     }
 890     else if (keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT)
 891     {
 892         if (flags & wxRICHTEXT_CTRL_DOWN)
 893             success = WordLeft(1, flags);
 894         else
 895             success = MoveLeft(1, flags);
 896     }
 897     else if (keyCode == WXK_UP || keyCode == WXK_NUMPAD_UP)
 898     {
 899         if (flags & wxRICHTEXT_CTRL_DOWN)
 900             success = MoveToParagraphStart(flags);
 901         else
 902             success = MoveUp(1, flags);
 903     }
 904     else if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN)
 905     {
 906         if (flags & wxRICHTEXT_CTRL_DOWN)
 907             success = MoveToParagraphEnd(flags);
 908         else
 909             success = MoveDown(1, flags);
 910     }
 911     else if (keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP)
 912     {
 913         success = PageUp(1, flags);
 914     }
 915     else if (keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
 916     {
 917         success = PageDown(1, flags);
 918     }
 919     else if (keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME)
 920     {
 921         if (flags & wxRICHTEXT_CTRL_DOWN)
 922             success = MoveHome(flags);
 923         else
 924             success = MoveToLineStart(flags);
 925     }
 926     else if (keyCode == WXK_END || keyCode == WXK_NUMPAD_END)
 927     {
 928         if (flags & wxRICHTEXT_CTRL_DOWN)
 929             success = MoveEnd(flags);
 930         else
 931             success = MoveToLineEnd(flags);
 932     }
 933
 934     if (success)
 935     {
 936         ScrollIntoView(m_caretPosition, keyCode);
 937         SetDefaultStyleToCursorStyle();
 938     }
 939
 940     return success;
 941 }
 942
 943 /// Extend the selection. Selections are in caret positions.
 944 bool wxRichTextCtrl::ExtendSelection(long oldPos, long newPos, int flags)
 945 {
 946     if (flags & wxRICHTEXT_SHIFT_DOWN)
 947     {
 948         // If not currently selecting, start selecting
 949         if (m_selectionRange.GetStart() == -2)
 950         {
 951             m_selectionAnchor = oldPos;
 952
 953             if (oldPos > newPos)
 954                 m_selectionRange.SetRange(newPos+1, oldPos);
 955             else
 956                 m_selectionRange.SetRange(oldPos+1, newPos);
 957         }
 958         else
 959         {
 960             // Always ensure that the selection range start is greater than
 961             // the end.
 962             if (newPos > m_selectionAnchor)
 963                 m_selectionRange.SetRange(m_selectionAnchor+1, newPos);
 964             else
 965                 m_selectionRange.SetRange(newPos+1, m_selectionAnchor);
 966         }
 967
 968         if (m_selectionRange.GetStart() > m_selectionRange.GetEnd())
 969         {
 970             wxLogDebug(wxT("Strange selection range"));
 971         }
 972
 973         return true;
 974     }
 975     else
 976         return false;
 977 }
 978
 979 /// Scroll into view, returning true if we scrolled.
 980 /// This takes a _caret_ position.
 981 bool wxRichTextCtrl::ScrollIntoView(long position, int keyCode)
 982 {
 983     wxRichTextLine* line = GetVisibleLineForCaretPosition(position);
 984
 985     if (!line)
 986         return false;
 987
 988     int ppuX, ppuY;
 989     GetScrollPixelsPerUnit(& ppuX, & ppuY);
 990
 991     int startXUnits, startYUnits;
 992     GetViewStart(& startXUnits, & startYUnits);
 993     int startY = startYUnits * ppuY;
 994
 995     int sx = 0, sy = 0;
 996     GetVirtualSize(& sx, & sy);
 997     int sxUnits = 0;
 998     int syUnits = 0;
 999     if (ppuY != 0)
1000         syUnits = sy/ppuY;
1001
1002     wxRect rect = line->GetRect();
1003
1004     bool scrolled = false;
1005
1006     wxSize clientSize = GetClientSize();
1007
1008     // Going down
1009     if (keyCode == WXK_DOWN || keyCode == WXK_NUMPAD_DOWN ||
1010         keyCode == WXK_RIGHT || keyCode == WXK_NUMPAD_DOWN ||
1011         keyCode == WXK_END || keyCode == WXK_NUMPAD_END ||
1012         keyCode == WXK_PAGEDOWN || keyCode == WXK_NUMPAD_PAGEDOWN)
1013     {
1014         if ((rect.y + rect.height) > (clientSize.y + startY))
1015         {
1016             // Make it scroll so this item is at the bottom
1017             // of the window
1018             int y = rect.y - (clientSize.y - rect.height);
1019             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1020
1021             // If we're still off the screen, scroll another line down
1022             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1023                 yUnits ++;
1024
1025             if (startYUnits != yUnits)
1026             {
1027                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1028                 scrolled = true;
1029             }
1030         }
1031         else if (rect.y < startY)
1032         {
1033             // Make it scroll so this item is at the top
1034             // of the window
1035             int y = rect.y ;
1036             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1037
1038             if (startYUnits != yUnits)
1039             {
1040                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1041                 scrolled = true;
1042             }
1043         }
1044     }
1045     // Going up
1046     else if (keyCode == WXK_UP  || keyCode == WXK_NUMPAD_UP ||
1047              keyCode == WXK_LEFT || keyCode == WXK_NUMPAD_LEFT ||
1048              keyCode == WXK_HOME || keyCode == WXK_NUMPAD_HOME ||
1049              keyCode == WXK_PAGEUP || keyCode == WXK_NUMPAD_PAGEUP )
1050     {
1051         if (rect.y < startY)
1052         {
1053             // Make it scroll so this item is at the top
1054             // of the window
1055             int y = rect.y ;
1056             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1057
1058             if (startYUnits != yUnits)
1059             {
1060                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1061                 scrolled = true;
1062             }
1063         }
1064         else if ((rect.y + rect.height) > (clientSize.y + startY))
1065         {
1066             // Make it scroll so this item is at the bottom
1067             // of the window
1068             int y = rect.y - (clientSize.y - rect.height);
1069             int yUnits = (int) (0.5 + ((float) y)/(float) ppuY);
1070
1071             // If we're still off the screen, scroll another line down
1072             if ((rect.y + rect.height) > (clientSize.y + (yUnits*ppuY)))
1073                 yUnits ++;
1074
1075             if (startYUnits != yUnits)
1076             {
1077                 SetScrollbars(ppuX, ppuY, sxUnits, syUnits, 0, yUnits);
1078                 scrolled = true;
1079             }
1080         }
1081     }
1082     PositionCaret();
1083
1084     return scrolled;
1085 }
1086
1087 /// Is the given position visible on the screen?
1088 bool wxRichTextCtrl::IsPositionVisible(long pos) const
1089 {
1090     wxRichTextLine* line = GetVisibleLineForCaretPosition(pos-1);
1091
1092     if (!line)
1093         return false;
1094
1095     int ppuX, ppuY;
1096     GetScrollPixelsPerUnit(& ppuX, & ppuY);
1097
1098     int startX, startY;
1099     GetViewStart(& startX, & startY);
1100     startX = 0;
1101     startY = startY * ppuY;
1102
1103     int sx = 0, sy = 0;
1104     GetVirtualSize(& sx, & sy);
1105     sx = 0;
1106     if (ppuY != 0)
1107         sy = sy/ppuY;
1108
1109     wxRect rect = line->GetRect();
1110
1111     wxSize clientSize = GetClientSize();
1112
1113     return !(((rect.y + rect.height) > (clientSize.y + startY)) || rect.y < startY);
1114 }
1115
1116 void wxRichTextCtrl::SetCaretPosition(long position, bool showAtLineStart)
1117 {
1118     m_caretPosition = position;
1119     m_caretAtLineStart = showAtLineStart;
1120 }
1121
1122 /// Move caret one visual step forward: this may mean setting a flag
1123 /// and keeping the same position if we're going from the end of one line
1124 /// to the start of the next, which may be the exact same caret position.
1125 void wxRichTextCtrl::MoveCaretForward(long oldPosition)
1126 {
1127     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1128
1129     // Only do the check if we're not at the end of the paragraph (where things work OK
1130     // anyway)
1131     if (para && (oldPosition != para->GetRange().GetEnd() - 1))
1132     {
1133         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1134
1135         if (line)
1136         {
1137             wxRichTextRange lineRange = line->GetAbsoluteRange();
1138
1139             // We're at the end of a line. See whether we need to
1140             // stay at the same actual caret position but change visual
1141             // position, or not.
1142             if (oldPosition == lineRange.GetEnd())
1143             {
1144                 if (m_caretAtLineStart)
1145                 {
1146                     // We're already at the start of the line, so actually move on now.
1147                     m_caretPosition = oldPosition + 1;
1148                     m_caretAtLineStart = false;
1149                 }
1150                 else
1151                 {
1152                     // We're showing at the end of the line, so keep to
1153                     // the same position but indicate that we're to show
1154                     // at the start of the next line.
1155                     m_caretPosition = oldPosition;
1156                     m_caretAtLineStart = true;
1157                 }
1158                 SetDefaultStyleToCursorStyle();
1159                 return;
1160             }
1161         }
1162     }
1163     m_caretPosition ++;
1164     SetDefaultStyleToCursorStyle();
1165 }
1166
1167 /// Move caret one visual step backward: this may mean setting a flag
1168 /// and keeping the same position if we're going from the end of one line
1169 /// to the start of the next, which may be the exact same caret position.
1170 void wxRichTextCtrl::MoveCaretBack(long oldPosition)
1171 {
1172     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(oldPosition);
1173
1174     // Only do the check if we're not at the start of the paragraph (where things work OK
1175     // anyway)
1176     if (para && (oldPosition != para->GetRange().GetStart()))
1177     {
1178         wxRichTextLine* line = GetBuffer().GetLineAtPosition(oldPosition);
1179
1180         if (line)
1181         {
1182             wxRichTextRange lineRange = line->GetAbsoluteRange();
1183
1184             // We're at the start of a line. See whether we need to
1185             // stay at the same actual caret position but change visual
1186             // position, or not.
1187             if (oldPosition == lineRange.GetStart())
1188             {
1189                 m_caretPosition = oldPosition-1;
1190                 m_caretAtLineStart = true;
1191                 return;
1192             }
1193             else if (oldPosition == lineRange.GetEnd())
1194             {
1195                 if (m_caretAtLineStart)
1196                 {
1197                     // We're at the start of the line, so keep the same caret position
1198                     // but clear the start-of-line flag.
1199                     m_caretPosition = oldPosition;
1200                     m_caretAtLineStart = false;
1201                 }
1202                 else
1203                 {
1204                     // We're showing at the end of the line, so go back
1205                     // to the previous character position.
1206                     m_caretPosition = oldPosition - 1;
1207                 }
1208                 SetDefaultStyleToCursorStyle();
1209                 return;
1210             }
1211         }
1212     }
1213     m_caretPosition --;
1214     SetDefaultStyleToCursorStyle();
1215 }
1216
1217 /// Move right
1218 bool wxRichTextCtrl::MoveRight(int noPositions, int flags)
1219 {
1220     long endPos = GetBuffer().GetRange().GetEnd();
1221
1222     if (m_caretPosition + noPositions < endPos)
1223     {
1224         long oldPos = m_caretPosition;
1225         long newPos = m_caretPosition + noPositions;
1226
1227         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1228         if (!extendSel)
1229             SelectNone();
1230
1231         // Determine by looking at oldPos and m_caretPosition whether
1232         // we moved from the end of a line to the start of the next line, in which case
1233         // we want to adjust the caret position such that it is positioned at the
1234         // start of the next line, rather than jumping past the first character of the
1235         // line.
1236         if (noPositions == 1 && !extendSel)
1237             MoveCaretForward(oldPos);
1238         else
1239             SetCaretPosition(newPos);
1240
1241         PositionCaret();
1242         SetDefaultStyleToCursorStyle();
1243
1244         if (extendSel)
1245             Refresh(false);
1246         return true;
1247     }
1248     else
1249         return false;
1250 }
1251
1252 /// Move left
1253 bool wxRichTextCtrl::MoveLeft(int noPositions, int flags)
1254 {
1255     long startPos = -1;
1256
1257     if (m_caretPosition > startPos - noPositions + 1)
1258     {
1259         long oldPos = m_caretPosition;
1260         long newPos = m_caretPosition - noPositions;
1261         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1262         if (!extendSel)
1263             SelectNone();
1264
1265         if (noPositions == 1 && !extendSel)
1266             MoveCaretBack(oldPos);
1267         else
1268             SetCaretPosition(newPos);
1269
1270         PositionCaret();
1271         SetDefaultStyleToCursorStyle();
1272
1273         if (extendSel)
1274             Refresh(false);
1275         return true;
1276     }
1277     else
1278         return false;
1279 }
1280
1281 /// Move up
1282 bool wxRichTextCtrl::MoveUp(int noLines, int flags)
1283 {
1284     return MoveDown(- noLines, flags);
1285 }
1286
1287 /// Move up
1288 bool wxRichTextCtrl::MoveDown(int noLines, int flags)
1289 {
1290     if (!GetCaret())
1291         return false;
1292
1293     long lineNumber = GetBuffer().GetVisibleLineNumber(m_caretPosition, true, m_caretAtLineStart);
1294     wxPoint pt = GetCaret()->GetPosition();
1295     long newLine = lineNumber + noLines;
1296
1297     if (lineNumber != -1)
1298     {
1299         if (noLines > 0)
1300         {
1301             long lastLine = GetBuffer().GetVisibleLineNumber(GetBuffer().GetRange().GetEnd());
1302
1303             if (newLine > lastLine)
1304                 return false;
1305         }
1306         else
1307         {
1308             if (newLine < 0)
1309                 return false;
1310         }
1311     }
1312
1313     wxRichTextLine* lineObj = GetBuffer().GetLineForVisibleLineNumber(newLine);
1314     if (lineObj)
1315     {
1316         pt.y = lineObj->GetAbsolutePosition().y + 2;
1317     }
1318     else
1319         return false;
1320
1321     long newPos = 0;
1322     wxClientDC dc(this);
1323     PrepareDC(dc);
1324     dc.SetFont(GetFont());
1325
1326     int hitTest = GetBuffer().HitTest(dc, pt, newPos);
1327
1328     if (hitTest != wxRICHTEXT_HITTEST_NONE)
1329     {
1330         // If end of previous line, and hitTest is wxRICHTEXT_HITTEST_BEFORE,
1331         // we want to be at the end of the last line but with m_caretAtLineStart set to true,
1332         // so we view the caret at the start of the line.
1333         bool caretLineStart = false;
1334         if (hitTest == wxRICHTEXT_HITTEST_BEFORE)
1335         {
1336             wxRichTextLine* thisLine = GetBuffer().GetLineAtPosition(newPos-1);
1337             wxRichTextRange lineRange;
1338             if (thisLine)
1339                 lineRange = thisLine->GetAbsoluteRange();
1340
1341             if (thisLine && (newPos-1) == lineRange.GetEnd())
1342             {
1343                 newPos --;
1344                 caretLineStart = true;
1345             }
1346             else
1347             {
1348                 wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(newPos);
1349                 if (para && para->GetRange().GetStart() == newPos)
1350                     newPos --;
1351             }
1352         }
1353
1354         long newSelEnd = newPos;
1355
1356         bool extendSel = ExtendSelection(m_caretPosition, newSelEnd, flags);
1357         if (!extendSel)
1358             SelectNone();
1359
1360         SetCaretPosition(newPos, caretLineStart);
1361         PositionCaret();
1362         SetDefaultStyleToCursorStyle();
1363
1364         if (extendSel)
1365             Refresh(false);
1366         return true;
1367     }
1368
1369     return false;
1370 }
1371
1372 /// Move to the end of the paragraph
1373 bool wxRichTextCtrl::MoveToParagraphEnd(int flags)
1374 {
1375     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1376     if (para)
1377     {
1378         long newPos = para->GetRange().GetEnd() - 1;
1379         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1380         if (!extendSel)
1381             SelectNone();
1382
1383         SetCaretPosition(newPos);
1384         PositionCaret();
1385         SetDefaultStyleToCursorStyle();
1386
1387         if (extendSel)
1388             Refresh(false);
1389         return true;
1390     }
1391
1392     return false;
1393 }
1394
1395 /// Move to the start of the paragraph
1396 bool wxRichTextCtrl::MoveToParagraphStart(int flags)
1397 {
1398     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(m_caretPosition, true);
1399     if (para)
1400     {
1401         long newPos = para->GetRange().GetStart() - 1;
1402         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1403         if (!extendSel)
1404             SelectNone();
1405
1406         SetCaretPosition(newPos);
1407         PositionCaret();
1408         SetDefaultStyleToCursorStyle();
1409
1410         if (extendSel)
1411             Refresh(false);
1412         return true;
1413     }
1414
1415     return false;
1416 }
1417
1418 /// Move to the end of the line
1419 bool wxRichTextCtrl::MoveToLineEnd(int flags)
1420 {
1421     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1422
1423     if (line)
1424     {
1425         wxRichTextRange lineRange = line->GetAbsoluteRange();
1426         long newPos = lineRange.GetEnd();
1427         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1428         if (!extendSel)
1429             SelectNone();
1430
1431         SetCaretPosition(newPos);
1432         PositionCaret();
1433         SetDefaultStyleToCursorStyle();
1434
1435         if (extendSel)
1436             Refresh(false);
1437         return true;
1438     }
1439
1440     return false;
1441 }
1442
1443 /// Move to the start of the line
1444 bool wxRichTextCtrl::MoveToLineStart(int flags)
1445 {
1446     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1447     if (line)
1448     {
1449         wxRichTextRange lineRange = line->GetAbsoluteRange();
1450         long newPos = lineRange.GetStart()-1;
1451
1452         bool extendSel = ExtendSelection(m_caretPosition, newPos, flags);
1453         if (!extendSel)
1454             SelectNone();
1455
1456         wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(line);
1457
1458         SetCaretPosition(newPos, para->GetRange().GetStart() != lineRange.GetStart());
1459         PositionCaret();
1460         SetDefaultStyleToCursorStyle();
1461
1462         if (extendSel)
1463             Refresh(false);
1464         return true;
1465     }
1466
1467     return false;
1468 }
1469
1470 /// Move to the start of the buffer
1471 bool wxRichTextCtrl::MoveHome(int flags)
1472 {
1473     if (m_caretPosition != -1)
1474     {
1475         bool extendSel = ExtendSelection(m_caretPosition, -1, flags);
1476         if (!extendSel)
1477             SelectNone();
1478
1479         SetCaretPosition(-1);
1480         PositionCaret();
1481         SetDefaultStyleToCursorStyle();
1482
1483         if (extendSel)
1484             Refresh(false);
1485         return true;
1486     }
1487     else
1488         return false;
1489 }
1490
1491 /// Move to the end of the buffer
1492 bool wxRichTextCtrl::MoveEnd(int flags)
1493 {
1494     long endPos = GetBuffer().GetRange().GetEnd()-1;
1495
1496     if (m_caretPosition != endPos)
1497     {
1498         bool extendSel = ExtendSelection(m_caretPosition, endPos, flags);
1499         if (!extendSel)
1500             SelectNone();
1501
1502         SetCaretPosition(endPos);
1503         PositionCaret();
1504         SetDefaultStyleToCursorStyle();
1505
1506         if (extendSel)
1507             Refresh(false);
1508         return true;
1509     }
1510     else
1511         return false;
1512 }
1513
1514 /// Move noPages pages up
1515 bool wxRichTextCtrl::PageUp(int noPages, int flags)
1516 {
1517     return PageDown(- noPages, flags);
1518 }
1519
1520 /// Move noPages pages down
1521 bool wxRichTextCtrl::PageDown(int noPages, int flags)
1522 {
1523     // Calculate which line occurs noPages * screen height further down.
1524     wxRichTextLine* line = GetVisibleLineForCaretPosition(m_caretPosition);
1525     if (line)
1526     {
1527         wxSize clientSize = GetClientSize();
1528         int newY = line->GetAbsolutePosition().y + noPages*clientSize.y;
1529
1530         wxRichTextLine* newLine = GetBuffer().GetLineAtYPosition(newY);
1531         if (newLine)
1532         {
1533             wxRichTextRange lineRange = newLine->GetAbsoluteRange();
1534             long pos = lineRange.GetStart()-1;
1535             if (pos != m_caretPosition)
1536             {
1537                 wxRichTextParagraph* para = GetBuffer().GetParagraphForLine(newLine);
1538
1539                 bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1540                 if (!extendSel)
1541                     SelectNone();
1542
1543                 SetCaretPosition(pos, para->GetRange().GetStart() != lineRange.GetStart());
1544                 PositionCaret();
1545                 SetDefaultStyleToCursorStyle();
1546
1547                 if (extendSel)
1548                     Refresh(false);
1549                 return true;
1550             }
1551         }
1552     }
1553
1554     return false;
1555 }
1556
1557 // Finds the caret position for the next word
1558 long wxRichTextCtrl::FindNextWordPosition(int direction) const
1559 {
1560     long endPos = GetBuffer().GetRange().GetEnd();
1561
1562     if (direction > 0)
1563     {
1564         long i = m_caretPosition+1+direction; // +1 for conversion to character pos
1565
1566         // First skip current text to space
1567         while (i < endPos && i > -1)
1568         {
1569             // i is in character, not caret positions
1570             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1571             if (text != wxT(" ") && !text.empty())
1572                 i += direction;
1573             else
1574             {
1575                 break;
1576             }
1577         }
1578         while (i < endPos && i > -1)
1579         {
1580             // i is in character, not caret positions
1581             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1582             if (text.empty()) // End of paragraph, or maybe an image
1583                 return wxMax(-1, i - 1);
1584             else if (text == wxT(" ") || text.empty())
1585                 i += direction;
1586             else
1587             {
1588                 // Convert to caret position
1589                 return wxMax(-1, i - 1);
1590             }
1591         }
1592         if (i >= endPos)
1593             return endPos-1;
1594         return i-1;
1595     }
1596     else
1597     {
1598         long i = m_caretPosition;
1599
1600         // First skip white space
1601         while (i < endPos && i > -1)
1602         {
1603             // i is in character, not caret positions
1604             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1605             if (text.empty()) // End of paragraph, or maybe an image
1606                 break;
1607             else if (text == wxT(" ") || text.empty())
1608                 i += direction;
1609             else
1610                 break;
1611         }
1612         // Next skip current text to space
1613         while (i < endPos && i > -1)
1614         {
1615             // i is in character, not caret positions
1616             wxString text = GetBuffer().GetTextForRange(wxRichTextRange(i, i));
1617             if (text != wxT(" ") /* && !text.empty() */)
1618                 i += direction;
1619             else
1620             {
1621                 return i;
1622             }
1623         }
1624         if (i < -1)
1625             return -1;
1626         return i;
1627     }
1628 }
1629
1630 /// Move n words left
1631 bool wxRichTextCtrl::WordLeft(int WXUNUSED(n), int flags)
1632 {
1633     long pos = FindNextWordPosition(-1);
1634     if (pos != m_caretPosition)
1635     {
1636         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1637
1638         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1639         if (!extendSel)
1640             SelectNone();
1641
1642         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1643         PositionCaret();
1644         SetDefaultStyleToCursorStyle();
1645
1646         if (extendSel)
1647             Refresh(false);
1648         return true;
1649     }
1650
1651     return false;
1652 }
1653
1654 /// Move n words right
1655 bool wxRichTextCtrl::WordRight(int WXUNUSED(n), int flags)
1656 {
1657     long pos = FindNextWordPosition(1);
1658     if (pos != m_caretPosition)
1659     {
1660         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(pos, true);
1661
1662         bool extendSel = ExtendSelection(m_caretPosition, pos, flags);
1663         if (!extendSel)
1664             SelectNone();
1665
1666         SetCaretPosition(pos, para->GetRange().GetStart() != pos);
1667         PositionCaret();
1668         SetDefaultStyleToCursorStyle();
1669
1670         if (extendSel)
1671             Refresh(false);
1672         return true;
1673     }
1674
1675     return false;
1676 }
1677
1678 /// Sizing
1679 void wxRichTextCtrl::OnSize(wxSizeEvent& event)
1680 {
1681     // Only do sizing optimization for large buffers
1682     if (GetBuffer().GetRange().GetEnd() > m_delayedLayoutThreshold)
1683     {
1684         m_fullLayoutRequired = true;
1685         m_fullLayoutTime = wxGetLocalTimeMillis();
1686         m_fullLayoutSavedPosition = GetFirstVisiblePosition();
1687         LayoutContent(true /* onlyVisibleRect */);
1688     }
1689     else
1690         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1691
1692 #if wxRICHTEXT_BUFFERED_PAINTING
1693     RecreateBuffer();
1694 #endif
1695
1696     event.Skip();
1697 }
1698
1699
1700 /// Idle-time processing
1701 void wxRichTextCtrl::OnIdle(wxIdleEvent& event)
1702 {
1703     const int layoutInterval = wxRICHTEXT_DEFAULT_LAYOUT_INTERVAL;
1704
1705     if (m_fullLayoutRequired && (wxGetLocalTimeMillis() > (m_fullLayoutTime + layoutInterval)))
1706     {
1707         m_fullLayoutRequired = false;
1708         m_fullLayoutTime = 0;
1709         GetBuffer().Invalidate(wxRICHTEXT_ALL);
1710         ShowPosition(m_fullLayoutSavedPosition);
1711         Refresh(false);
1712     }
1713
1714     if (m_caretPositionForDefaultStyle != -2)
1715     {
1716         // If the caret position has changed, no longer reflect the default style
1717         // in the UI.
1718         if (GetCaretPosition() != m_caretPositionForDefaultStyle)
1719             m_caretPositionForDefaultStyle = -2;
1720     }
1721
1722     event.Skip();
1723 }
1724
1725 /// Scrolling
1726 void wxRichTextCtrl::OnScroll(wxScrollWinEvent& event)
1727 {
1728     // Not used
1729     event.Skip();
1730 }
1731
1732 /// Set up scrollbars, e.g. after a resize
1733 void wxRichTextCtrl::SetupScrollbars(bool atTop)
1734 {
1735     if (m_freezeCount)
1736         return;
1737
1738     if (GetBuffer().IsEmpty())
1739     {
1740         SetScrollbars(0, 0, 0, 0, 0, 0);
1741         return;
1742     }
1743
1744     // TODO: reimplement scrolling so we scroll by line, not by fixed number
1745     // of pixels. See e.g. wxVScrolledWindow for ideas.
1746     int pixelsPerUnit = 5;
1747     wxSize clientSize = GetClientSize();
1748
1749     int maxHeight = GetBuffer().GetCachedSize().y;
1750
1751     // Round up so we have at least maxHeight pixels
1752     int unitsY = (int) (((float)maxHeight/(float)pixelsPerUnit) + 0.5);
1753
1754     int startX = 0, startY = 0;
1755     if (!atTop)
1756         GetViewStart(& startX, & startY);
1757
1758     int maxPositionX = 0; // wxMax(sz.x - clientSize.x, 0);
1759     int maxPositionY = (int) ((((float)(wxMax((unitsY*pixelsPerUnit) - clientSize.y, 0)))/((float)pixelsPerUnit)) + 0.5);
1760
1761     // Move to previous scroll position if
1762     // possible
1763     SetScrollbars(0, pixelsPerUnit,
1764         0, unitsY,
1765         wxMin(maxPositionX, startX), wxMin(maxPositionY, startY));
1766 }
1767
1768 /// Paint the background
1769 void wxRichTextCtrl::PaintBackground(wxDC& dc)
1770 {
1771     wxColour backgroundColour = GetBackgroundColour();
1772     if (!backgroundColour.Ok())
1773         backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1774
1775     // Clear the background
1776     dc.SetBrush(wxBrush(backgroundColour));
1777     dc.SetPen(*wxTRANSPARENT_PEN);
1778     wxRect windowRect(GetClientSize());
1779     windowRect.x -= 2; windowRect.y -= 2;
1780     windowRect.width += 4; windowRect.height += 4;
1781
1782     // We need to shift the rectangle to take into account
1783     // scrolling. Converting device to logical coordinates.
1784     CalcUnscrolledPosition(windowRect.x, windowRect.y, & windowRect.x, & windowRect.y);
1785     dc.DrawRectangle(windowRect);
1786 }
1787
1788 #if wxRICHTEXT_BUFFERED_PAINTING
1789 /// Recreate buffer bitmap if necessary
1790 bool wxRichTextCtrl::RecreateBuffer(const wxSize& size)
1791 {
1792     wxSize sz = size;
1793     if (sz == wxDefaultSize)
1794         sz = GetClientSize();
1795
1796     if (sz.x < 1 || sz.y < 1)
1797         return false;
1798
1799     if (!m_bufferBitmap.Ok() || m_bufferBitmap.GetWidth() < sz.x || m_bufferBitmap.GetHeight() < sz.y)
1800         m_bufferBitmap = wxBitmap(sz.x, sz.y);
1801     return m_bufferBitmap.Ok();
1802 }
1803 #endif
1804
1805 // ----------------------------------------------------------------------------
1806 // file IO functions
1807 // ----------------------------------------------------------------------------
1808
1809 bool wxRichTextCtrl::DoLoadFile(const wxString& filename, int fileType)
1810 {
1811     bool success = GetBuffer().LoadFile(filename, fileType);
1812     if (success)
1813         m_filename = filename;
1814
1815     DiscardEdits();
1816     SetInsertionPoint(0);
1817     LayoutContent();
1818     PositionCaret();
1819     SetupScrollbars(true);
1820     Refresh(false);
1821     SendTextUpdatedEvent();
1822
1823     if (success)
1824         return true;
1825     else
1826     {
1827         wxLogError(_("File couldn't be loaded."));
1828
1829         return false;
1830     }
1831 }
1832
1833 bool wxRichTextCtrl::DoSaveFile(const wxString& filename, int fileType)
1834 {
1835     if (GetBuffer().SaveFile(filename, fileType))
1836     {
1837         m_filename = filename;
1838
1839         DiscardEdits();
1840
1841         return true;
1842     }
1843
1844     wxLogError(_("The text couldn't be saved."));
1845
1846     return false;
1847 }
1848
1849 // ----------------------------------------------------------------------------
1850 // wxRichTextCtrl specific functionality
1851 // ----------------------------------------------------------------------------
1852
1853 /// Add a new paragraph of text to the end of the buffer
1854 wxRichTextRange wxRichTextCtrl::AddParagraph(const wxString& text)
1855 {
1856     return GetBuffer().AddParagraph(text);
1857 }
1858
1859 /// Add an image
1860 wxRichTextRange wxRichTextCtrl::AddImage(const wxImage& image)
1861 {
1862     return GetBuffer().AddImage(image);
1863 }
1864
1865 // ----------------------------------------------------------------------------
1866 // selection and ranges
1867 // ----------------------------------------------------------------------------
1868
1869 void wxRichTextCtrl::SelectAll()
1870 {
1871     SetSelection(0, GetLastPosition()+1);
1872     m_selectionAnchor = -1;
1873 }
1874
1875 /// Select none
1876 void wxRichTextCtrl::SelectNone()
1877 {
1878     if (!(GetSelectionRange() == wxRichTextRange(-2, -2)))
1879         SetSelection(-2, -2);
1880     m_selectionAnchor = -2;
1881 }
1882
1883 static bool wxIsWordDelimiter(const wxString& text)
1884 {
1885     return !text.IsEmpty() && !wxIsalnum(text[0]);
1886 }
1887
1888 /// Select the word at the given character position
1889 bool wxRichTextCtrl::SelectWord(long position)
1890 {
1891     if (position < 0 || position > GetBuffer().GetRange().GetEnd())
1892         return false;
1893
1894     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(position);
1895     if (!para)
1896         return false;
1897
1898     long positionStart = position;
1899     long positionEnd = position;
1900
1901     for (positionStart = position; positionStart >= para->GetRange().GetStart(); positionStart --)
1902     {
1903         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionStart, positionStart));
1904         if (wxIsWordDelimiter(text))
1905         {
1906             positionStart ++;
1907             break;
1908         }
1909     }
1910     if (positionStart < para->GetRange().GetStart())
1911         positionStart = para->GetRange().GetStart();
1912
1913     for (positionEnd = position; positionEnd < para->GetRange().GetEnd(); positionEnd ++)
1914     {
1915         wxString text = GetBuffer().GetTextForRange(wxRichTextRange(positionEnd, positionEnd));
1916         if (wxIsWordDelimiter(text))
1917         {
1918             positionEnd --;
1919             break;
1920         }
1921     }
1922     if (positionEnd >= para->GetRange().GetEnd())
1923         positionEnd = para->GetRange().GetEnd();
1924
1925     SetSelection(positionStart, positionEnd+1);
1926
1927     if (positionStart >= 0)
1928     {
1929         MoveCaret(positionStart-1, true);
1930         SetDefaultStyleToCursorStyle();
1931     }
1932
1933     return true;
1934 }
1935
1936 wxString wxRichTextCtrl::GetStringSelection() const
1937 {
1938     long from, to;
1939     GetSelection(&from, &to);
1940
1941     return GetRange(from, to);
1942 }
1943
1944 // ----------------------------------------------------------------------------
1945 // hit testing
1946 // ----------------------------------------------------------------------------
1947
1948 wxTextCtrlHitTestResult
1949 wxRichTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *x, wxTextCoord *y) const
1950 {
1951     // implement in terms of the other overload as the native ports typically
1952     // can get the position and not (x, y) pair directly (although wxUniv
1953     // directly gets x and y -- and so overrides this method as well)
1954     long pos;
1955     wxTextCtrlHitTestResult rc = HitTest(pt, &pos);
1956
1957     if ( rc != wxTE_HT_UNKNOWN )
1958     {
1959         PositionToXY(pos, x, y);
1960     }
1961
1962     return rc;
1963 }
1964
1965 wxTextCtrlHitTestResult
1966 wxRichTextCtrl::HitTest(const wxPoint& pt,
1967                         long * pos) const
1968 {
1969     wxClientDC dc((wxRichTextCtrl*) this);
1970     ((wxRichTextCtrl*)this)->PrepareDC(dc);
1971
1972     // Buffer uses logical position (relative to start of buffer)
1973     // so convert
1974     wxPoint pt2 = GetLogicalPoint(pt);
1975
1976     int hit = ((wxRichTextCtrl*)this)->GetBuffer().HitTest(dc, pt2, *pos);
1977
1978     switch ( hit )
1979     {
1980         case wxRICHTEXT_HITTEST_BEFORE:
1981             return wxTE_HT_BEFORE;
1982
1983         case wxRICHTEXT_HITTEST_AFTER:
1984             return wxTE_HT_BEYOND;
1985
1986         case wxRICHTEXT_HITTEST_ON:
1987             return wxTE_HT_ON_TEXT;
1988     }
1989
1990     return wxTE_HT_UNKNOWN;
1991 }
1992
1993 // ----------------------------------------------------------------------------
1994 // set/get the controls text
1995 // ----------------------------------------------------------------------------
1996
1997 wxString wxRichTextCtrl::GetValue() const
1998 {
1999     return GetBuffer().GetText();
2000 }
2001
2002 wxString wxRichTextCtrl::GetRange(long from, long to) const
2003 {
2004     // Public API for range is different from internals
2005     return GetBuffer().GetTextForRange(wxRichTextRange(from, to-1));
2006 }
2007
2008 void wxRichTextCtrl::DoSetValue(const wxString& value, int flags)
2009 {
2010     Clear();
2011
2012     // if the text is long enough, it's faster to just set it instead of first
2013     // comparing it with the old one (chances are that it will be different
2014     // anyhow, this comparison is there to avoid flicker for small single-line
2015     // edit controls mostly)
2016     if ( (value.length() > 0x400) || (value != GetValue()) )
2017     {
2018         DoWriteText(value);
2019
2020         // for compatibility, don't move the cursor when doing SetValue()
2021         SetInsertionPoint(0);
2022     }
2023     else // same text
2024     {
2025         if ( flags & SetValue_SendEvent )
2026         {
2027             // still send an event for consistency
2028             SendTextUpdatedEvent();
2029         }
2030     }
2031
2032     // we should reset the modified flag even if the value didn't really change
2033
2034     // mark the control as being not dirty - we changed its text, not the
2035     // user
2036     DiscardEdits();
2037 }
2038
2039 void wxRichTextCtrl::WriteText(const wxString& value)
2040 {
2041     DoWriteText(value);
2042 }
2043
2044 void wxRichTextCtrl::DoWriteText(const wxString& value, int flags)
2045 {
2046     wxString valueUnix = wxTextFile::Translate(value, wxTextFileType_Unix);
2047
2048     GetBuffer().InsertTextWithUndo(m_caretPosition+1, valueUnix, this, wxRICHTEXT_INSERT_WITH_PREVIOUS_PARAGRAPH_STYLE);
2049
2050     if ( flags & SetValue_SendEvent )
2051         SendTextUpdatedEvent();
2052 }
2053
2054 void wxRichTextCtrl::AppendText(const wxString& text)
2055 {
2056     SetInsertionPointEnd();
2057
2058     WriteText(text);
2059 }
2060
2061 /// Write an image at the current insertion point
2062 bool wxRichTextCtrl::WriteImage(const wxImage& image, int bitmapType)
2063 {
2064     wxRichTextImageBlock imageBlock;
2065
2066     wxImage image2 = image;
2067     if (imageBlock.MakeImageBlock(image2, bitmapType))
2068         return WriteImage(imageBlock);
2069
2070     return false;
2071 }
2072
2073 bool wxRichTextCtrl::WriteImage(const wxString& filename, int bitmapType)
2074 {
2075     wxRichTextImageBlock imageBlock;
2076
2077     wxImage image;
2078     if (imageBlock.MakeImageBlock(filename, bitmapType, image, false))
2079         return WriteImage(imageBlock);
2080
2081     return false;
2082 }
2083
2084 bool wxRichTextCtrl::WriteImage(const wxRichTextImageBlock& imageBlock)
2085 {
2086     return GetBuffer().InsertImageWithUndo(m_caretPosition+1, imageBlock, this);
2087 }
2088
2089 bool wxRichTextCtrl::WriteImage(const wxBitmap& bitmap, int bitmapType)
2090 {
2091     if (bitmap.Ok())
2092     {
2093         wxRichTextImageBlock imageBlock;
2094
2095         wxImage image = bitmap.ConvertToImage();
2096         if (image.Ok() && imageBlock.MakeImageBlock(image, bitmapType))
2097             return WriteImage(imageBlock);
2098     }
2099
2100     return false;
2101 }
2102
2103 /// Insert a newline (actually paragraph) at the current insertion point.
2104 bool wxRichTextCtrl::Newline()
2105 {
2106     return GetBuffer().InsertNewlineWithUndo(m_caretPosition+1, this);
2107 }
2108
2109 /// Insert a line break at the current insertion point.
2110 bool wxRichTextCtrl::LineBreak()
2111 {
2112     wxString text;
2113     text = wxRichTextLineBreakChar;
2114     return GetBuffer().InsertTextWithUndo(m_caretPosition+1, text, this);
2115 }
2116
2117 // ----------------------------------------------------------------------------
2118 // Clipboard operations
2119 // ----------------------------------------------------------------------------
2120
2121 void wxRichTextCtrl::Copy()
2122 {
2123     if (CanCopy())
2124     {
2125         wxRichTextRange range = GetInternalSelectionRange();
2126         GetBuffer().CopyToClipboard(range);
2127     }
2128 }
2129
2130 void wxRichTextCtrl::Cut()
2131 {
2132     if (CanCut())
2133     {
2134         wxRichTextRange range = GetInternalSelectionRange();
2135         GetBuffer().CopyToClipboard(range);
2136
2137         DeleteSelectedContent();
2138         LayoutContent();
2139         Refresh(false);
2140     }
2141 }
2142
2143 void wxRichTextCtrl::Paste()
2144 {
2145     if (CanPaste())
2146     {
2147         BeginBatchUndo(_("Paste"));
2148
2149         long newPos = m_caretPosition;
2150         DeleteSelectedContent(& newPos);
2151
2152         GetBuffer().PasteFromClipboard(newPos);
2153
2154         EndBatchUndo();
2155     }
2156 }
2157
2158 void wxRichTextCtrl::DeleteSelection()
2159 {
2160     if (CanDeleteSelection())
2161     {
2162         DeleteSelectedContent();
2163     }
2164 }
2165
2166 bool wxRichTextCtrl::HasSelection() const
2167 {
2168     return m_selectionRange.GetStart() != -2 && m_selectionRange.GetEnd() != -2;
2169 }
2170
2171 bool wxRichTextCtrl::CanCopy() const
2172 {
2173     // Can copy if there's a selection
2174     return HasSelection();
2175 }
2176
2177 bool wxRichTextCtrl::CanCut() const
2178 {
2179     return HasSelection() && IsEditable();
2180 }
2181
2182 bool wxRichTextCtrl::CanPaste() const
2183 {
2184     if ( !IsEditable() )
2185         return false;
2186
2187     return GetBuffer().CanPasteFromClipboard();
2188 }
2189
2190 bool wxRichTextCtrl::CanDeleteSelection() const
2191 {
2192     return HasSelection() && IsEditable();
2193 }
2194
2195
2196 // ----------------------------------------------------------------------------
2197 // Accessors
2198 // ----------------------------------------------------------------------------
2199
2200 void wxRichTextCtrl::SetEditable(bool editable)
2201 {
2202     m_editable = editable;
2203 }
2204
2205 void wxRichTextCtrl::SetInsertionPoint(long pos)
2206 {
2207     SelectNone();
2208
2209     m_caretPosition = pos - 1;
2210 }
2211
2212 void wxRichTextCtrl::SetInsertionPointEnd()
2213 {
2214     long pos = GetLastPosition();
2215     SetInsertionPoint(pos);
2216 }
2217
2218 long wxRichTextCtrl::GetInsertionPoint() const
2219 {
2220     return m_caretPosition+1;
2221 }
2222
2223 wxTextPos wxRichTextCtrl::GetLastPosition() const
2224 {
2225     return GetBuffer().GetRange().GetEnd();
2226 }
2227
2228 // If the return values from and to are the same, there is no
2229 // selection.
2230 void wxRichTextCtrl::GetSelection(long* from, long* to) const
2231 {
2232     *from = m_selectionRange.GetStart();
2233     *to = m_selectionRange.GetEnd();
2234     if ((*to) != -1 && (*to) != -2)
2235         (*to) ++;
2236 }
2237
2238 bool wxRichTextCtrl::IsEditable() const
2239 {
2240     return m_editable;
2241 }
2242
2243 // ----------------------------------------------------------------------------
2244 // selection
2245 // ----------------------------------------------------------------------------
2246
2247 void wxRichTextCtrl::SetSelection(long from, long to)
2248 {
2249     // if from and to are both -1, it means (in wxWidgets) that all text should
2250     // be selected.
2251     if ( (from == -1) && (to == -1) )
2252     {
2253         from = 0;
2254         to = GetLastPosition()+1;
2255     }
2256
2257     DoSetSelection(from, to);
2258 }
2259
2260 void wxRichTextCtrl::DoSetSelection(long from, long to, bool WXUNUSED(scrollCaret))
2261 {
2262     m_selectionAnchor = from;
2263     m_selectionRange.SetRange(from, to-1);
2264     if (from > -2)
2265         m_caretPosition = from-1;
2266
2267     Refresh(false);
2268     PositionCaret();
2269 }
2270
2271 // ----------------------------------------------------------------------------
2272 // Editing
2273 // ----------------------------------------------------------------------------
2274
2275 void wxRichTextCtrl::Replace(long WXUNUSED(from), long WXUNUSED(to),
2276                              const wxString& value)
2277 {
2278     BeginBatchUndo(_("Replace"));
2279
2280     DeleteSelectedContent();
2281
2282     DoWriteText(value, SetValue_SelectionOnly);
2283
2284     EndBatchUndo();
2285 }
2286
2287 void wxRichTextCtrl::Remove(long from, long to)
2288 {
2289     SelectNone();
2290
2291     GetBuffer().DeleteRangeWithUndo(wxRichTextRange(from, to), this);
2292
2293     LayoutContent();
2294     if (!IsFrozen())
2295         Refresh(false);
2296 }
2297
2298 bool wxRichTextCtrl::IsModified() const
2299 {
2300     return m_buffer.IsModified();
2301 }
2302
2303 void wxRichTextCtrl::MarkDirty()
2304 {
2305     m_buffer.Modify(true);
2306 }
2307
2308 void wxRichTextCtrl::DiscardEdits()
2309 {
2310     m_caretPositionForDefaultStyle = -2;
2311     m_buffer.Modify(false);
2312     m_buffer.GetCommandProcessor()->ClearCommands();
2313 }
2314
2315 int wxRichTextCtrl::GetNumberOfLines() const
2316 {
2317     return GetBuffer().GetParagraphCount();
2318 }
2319
2320 // ----------------------------------------------------------------------------
2321 // Positions <-> coords
2322 // ----------------------------------------------------------------------------
2323
2324 long wxRichTextCtrl::XYToPosition(long x, long y) const
2325 {
2326     return GetBuffer().XYToPosition(x, y);
2327 }
2328
2329 bool wxRichTextCtrl::PositionToXY(long pos, long *x, long *y) const
2330 {
2331     return GetBuffer().PositionToXY(pos, x, y);
2332 }
2333
2334 // ----------------------------------------------------------------------------
2335 //
2336 // ----------------------------------------------------------------------------
2337
2338 void wxRichTextCtrl::ShowPosition(long pos)
2339 {
2340     if (!IsPositionVisible(pos))
2341         ScrollIntoView(pos-1, WXK_DOWN);
2342 }
2343
2344 int wxRichTextCtrl::GetLineLength(long lineNo) const
2345 {
2346     return GetBuffer().GetParagraphLength(lineNo);
2347 }
2348
2349 wxString wxRichTextCtrl::GetLineText(long lineNo) const
2350 {
2351     return GetBuffer().GetParagraphText(lineNo);
2352 }
2353
2354 // ----------------------------------------------------------------------------
2355 // Undo/redo
2356 // ----------------------------------------------------------------------------
2357
2358 void wxRichTextCtrl::Undo()
2359 {
2360     if (CanUndo())
2361     {
2362         GetCommandProcessor()->Undo();
2363     }
2364 }
2365
2366 void wxRichTextCtrl::Redo()
2367 {
2368     if (CanRedo())
2369     {
2370         GetCommandProcessor()->Redo();
2371     }
2372 }
2373
2374 bool wxRichTextCtrl::CanUndo() const
2375 {
2376     return GetCommandProcessor()->CanUndo();
2377 }
2378
2379 bool wxRichTextCtrl::CanRedo() const
2380 {
2381     return GetCommandProcessor()->CanRedo();
2382 }
2383
2384 // ----------------------------------------------------------------------------
2385 // implementation details
2386 // ----------------------------------------------------------------------------
2387
2388 void wxRichTextCtrl::Command(wxCommandEvent& event)
2389 {
2390     SetValue(event.GetString());
2391     GetEventHandler()->ProcessEvent(event);
2392 }
2393
2394 void wxRichTextCtrl::OnDropFiles(wxDropFilesEvent& event)
2395 {
2396     // By default, load the first file into the text window.
2397     if (event.GetNumberOfFiles() > 0)
2398     {
2399         LoadFile(event.GetFiles()[0]);
2400     }
2401 }
2402
2403 wxSize wxRichTextCtrl::DoGetBestSize() const
2404 {
2405     return wxSize(10, 10);
2406 }
2407
2408 // ----------------------------------------------------------------------------
2409 // standard handlers for standard edit menu events
2410 // ----------------------------------------------------------------------------
2411
2412 void wxRichTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2413 {
2414     Cut();
2415 }
2416
2417 void wxRichTextCtrl::OnClear(wxCommandEvent& WXUNUSED(event))
2418 {
2419     DeleteSelection();
2420 }
2421
2422 void wxRichTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2423 {
2424     Copy();
2425 }
2426
2427 void wxRichTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2428 {
2429     Paste();
2430 }
2431
2432 void wxRichTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2433 {
2434     Undo();
2435 }
2436
2437 void wxRichTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2438 {
2439     Redo();
2440 }
2441
2442 void wxRichTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2443 {
2444     event.Enable( CanCut() );
2445 }
2446
2447 void wxRichTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2448 {
2449     event.Enable( CanCopy() );
2450 }
2451
2452 void wxRichTextCtrl::OnUpdateClear(wxUpdateUIEvent& event)
2453 {
2454     event.Enable( CanDeleteSelection() );
2455 }
2456
2457 void wxRichTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2458 {
2459     event.Enable( CanPaste() );
2460 }
2461
2462 void wxRichTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2463 {
2464     event.Enable( CanUndo() );
2465     event.SetText( GetCommandProcessor()->GetUndoMenuLabel() );
2466 }
2467
2468 void wxRichTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2469 {
2470     event.Enable( CanRedo() );
2471     event.SetText( GetCommandProcessor()->GetRedoMenuLabel() );
2472 }
2473
2474 void wxRichTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2475 {
2476     SelectAll();
2477 }
2478
2479 void wxRichTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2480 {
2481     event.Enable(GetLastPosition() > 0);
2482 }
2483
2484 void wxRichTextCtrl::OnContextMenu(wxContextMenuEvent& WXUNUSED(event))
2485 {
2486     if (!m_contextMenu)
2487     {
2488         m_contextMenu = new wxMenu;
2489         m_contextMenu->Append(wxID_UNDO, _("&Undo"));
2490         m_contextMenu->Append(wxID_REDO, _("&Redo"));
2491         m_contextMenu->AppendSeparator();
2492         m_contextMenu->Append(wxID_CUT, _("Cu&t"));
2493         m_contextMenu->Append(wxID_COPY, _("&Copy"));
2494         m_contextMenu->Append(wxID_PASTE, _("&Paste"));
2495         m_contextMenu->Append(wxID_CLEAR, _("&Delete"));
2496         m_contextMenu->AppendSeparator();
2497         m_contextMenu->Append(wxID_SELECTALL, _("Select &All"));
2498     }
2499     PopupMenu(m_contextMenu);
2500     return;
2501 }
2502
2503 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttrEx& style)
2504 {
2505     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style);
2506 }
2507
2508 bool wxRichTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2509 {
2510     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), wxTextAttrEx(style));
2511 }
2512
2513 bool wxRichTextCtrl::SetStyle(const wxRichTextRange& range, const wxRichTextAttr& style)
2514 {
2515     return GetBuffer().SetStyle(range.ToInternal(), style);
2516 }
2517
2518 // extended style setting operation with flags including:
2519 // wxRICHTEXT_SETSTYLE_WITH_UNDO, wxRICHTEXT_SETSTYLE_OPTIMIZE, wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY.
2520 // see richtextbuffer.h for more details.
2521 bool wxRichTextCtrl::SetStyleEx(long start, long end, const wxTextAttrEx& style, int flags)
2522 {
2523     return GetBuffer().SetStyle(wxRichTextRange(start, end-1), style, flags);
2524 }
2525
2526 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxTextAttrEx& style, int flags)
2527 {
2528     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2529 }
2530
2531 bool wxRichTextCtrl::SetStyleEx(const wxRichTextRange& range, const wxRichTextAttr& style, int flags)
2532 {
2533     return GetBuffer().SetStyle(range.ToInternal(), style, flags);
2534 }
2535
2536 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttrEx& style)
2537 {
2538     return GetBuffer().SetDefaultStyle(style);
2539 }
2540
2541 bool wxRichTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2542 {
2543     return GetBuffer().SetDefaultStyle(wxTextAttrEx(style));
2544 }
2545
2546 const wxTextAttrEx& wxRichTextCtrl::GetDefaultStyleEx() const
2547 {
2548     return GetBuffer().GetDefaultStyle();
2549 }
2550
2551 const wxTextAttr& wxRichTextCtrl::GetDefaultStyle() const
2552 {
2553     return GetBuffer().GetDefaultStyle();
2554 }
2555
2556 bool wxRichTextCtrl::GetStyle(long position, wxTextAttr& style)
2557 {
2558     wxTextAttrEx attr(style);
2559     if (GetBuffer().GetStyle(position, attr))
2560     {
2561         style = attr;
2562         return true;
2563     }
2564     else
2565         return false;
2566 }
2567
2568 bool wxRichTextCtrl::GetStyle(long position, wxTextAttrEx& style)
2569 {
2570     return GetBuffer().GetStyle(position, style);
2571 }
2572
2573 bool wxRichTextCtrl::GetStyle(long position, wxRichTextAttr& style)
2574 {
2575     return GetBuffer().GetStyle(position, style);
2576 }
2577
2578 // get the common set of styles for the range
2579 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxRichTextAttr& style)
2580 {
2581     wxTextAttrEx styleEx;
2582     if (GetBuffer().GetStyleForRange(range.ToInternal(), styleEx))
2583     {
2584         style = styleEx;
2585         return true;
2586     }
2587     else
2588         return false;
2589 }
2590
2591 bool wxRichTextCtrl::GetStyleForRange(const wxRichTextRange& range, wxTextAttrEx& style)
2592 {
2593     return GetBuffer().GetStyleForRange(range.ToInternal(), style);
2594 }
2595
2596 /// Get the content (uncombined) attributes for this position.
2597
2598 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttr& style)
2599 {
2600     wxTextAttrEx attr(style);
2601     if (GetBuffer().GetUncombinedStyle(position, attr))
2602     {
2603         style = attr;
2604         return true;
2605     }
2606     else
2607         return false;
2608 }
2609
2610 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxTextAttrEx& style)
2611 {
2612     return GetBuffer().GetUncombinedStyle(position, style);
2613 }
2614
2615 bool wxRichTextCtrl::GetUncombinedStyle(long position, wxRichTextAttr& style)
2616 {
2617     return GetBuffer().GetUncombinedStyle(position, style);
2618 }
2619
2620 /// Set font, and also the buffer attributes
2621 bool wxRichTextCtrl::SetFont(const wxFont& font)
2622 {
2623     wxControl::SetFont(font);
2624
2625     wxTextAttrEx attr = GetBuffer().GetAttributes();
2626     attr.SetFont(font);
2627     GetBuffer().SetBasicStyle(attr);
2628
2629     GetBuffer().Invalidate(wxRICHTEXT_ALL);
2630     Refresh(false);
2631
2632     return true;
2633 }
2634
2635 /// Transform logical to physical
2636 wxPoint wxRichTextCtrl::GetPhysicalPoint(const wxPoint& ptLogical) const
2637 {
2638     wxPoint pt;
2639     CalcScrolledPosition(ptLogical.x, ptLogical.y, & pt.x, & pt.y);
2640
2641     return pt;
2642 }
2643
2644 /// Transform physical to logical
2645 wxPoint wxRichTextCtrl::GetLogicalPoint(const wxPoint& ptPhysical) const
2646 {
2647     wxPoint pt;
2648     CalcUnscrolledPosition(ptPhysical.x, ptPhysical.y, & pt.x, & pt.y);
2649
2650     return pt;
2651 }
2652
2653 /// Position the caret
2654 void wxRichTextCtrl::PositionCaret()
2655 {
2656     if (!GetCaret())
2657         return;
2658
2659     //wxLogDebug(wxT("PositionCaret"));
2660
2661     wxRect caretRect;
2662     if (GetCaretPositionForIndex(GetCaretPosition(), caretRect))
2663     {
2664         wxPoint originalPt = caretRect.GetPosition();
2665         wxPoint pt = GetPhysicalPoint(originalPt);
2666         if (GetCaret()->GetPosition() != pt)
2667         {
2668             GetCaret()->Move(pt);
2669             GetCaret()->SetSize(caretRect.GetSize());
2670         }
2671     }
2672 }
2673
2674 /// Get the caret height and position for the given character position
2675 bool wxRichTextCtrl::GetCaretPositionForIndex(long position, wxRect& rect)
2676 {
2677     wxClientDC dc(this);
2678     dc.SetFont(GetFont());
2679
2680     PrepareDC(dc);
2681
2682     wxPoint pt;
2683     int height = 0;
2684
2685     if (GetBuffer().FindPosition(dc, position, pt, & height, m_caretAtLineStart))
2686     {
2687         rect = wxRect(pt, wxSize(wxRICHTEXT_DEFAULT_CARET_WIDTH, height));
2688         return true;
2689     }
2690
2691     return false;
2692 }
2693
2694 /// Gets the line for the visible caret position. If the caret is
2695 /// shown at the very end of the line, it means the next character is actually
2696 /// on the following line. So let's get the line we're expecting to find
2697 /// if this is the case.
2698 wxRichTextLine* wxRichTextCtrl::GetVisibleLineForCaretPosition(long caretPosition) const
2699 {
2700     wxRichTextLine* line = GetBuffer().GetLineAtPosition(caretPosition, true);
2701     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPosition, true);
2702     if (line)
2703     {
2704         wxRichTextRange lineRange = line->GetAbsoluteRange();
2705         if (caretPosition == lineRange.GetStart()-1 &&
2706             (para->GetRange().GetStart() != lineRange.GetStart()))
2707         {
2708             if (!m_caretAtLineStart)
2709                 line = GetBuffer().GetLineAtPosition(caretPosition-1, true);
2710         }
2711     }
2712     return line;
2713 }
2714
2715
2716 /// Move the caret to the given character position
2717 bool wxRichTextCtrl::MoveCaret(long pos, bool showAtLineStart)
2718 {
2719     if (GetBuffer().GetDirty())
2720         LayoutContent();
2721
2722     if (pos <= GetBuffer().GetRange().GetEnd())
2723     {
2724         SetCaretPosition(pos, showAtLineStart);
2725
2726         PositionCaret();
2727
2728         return true;
2729     }
2730     else
2731         return false;
2732 }
2733
2734 /// Layout the buffer: which we must do before certain operations, such as
2735 /// setting the caret position.
2736 bool wxRichTextCtrl::LayoutContent(bool onlyVisibleRect)
2737 {
2738     if (GetBuffer().GetDirty() || onlyVisibleRect)
2739     {
2740         wxRect availableSpace(GetClientSize());
2741         if (availableSpace.width == 0)
2742             availableSpace.width = 10;
2743         if (availableSpace.height == 0)
2744             availableSpace.height = 10;
2745
2746         int flags = wxRICHTEXT_FIXED_WIDTH|wxRICHTEXT_VARIABLE_HEIGHT;
2747         if (onlyVisibleRect)
2748         {
2749             flags |= wxRICHTEXT_LAYOUT_SPECIFIED_RECT;
2750             availableSpace.SetPosition(GetLogicalPoint(wxPoint(0, 0)));
2751         }
2752
2753         wxClientDC dc(this);
2754         dc.SetFont(GetFont());
2755
2756         PrepareDC(dc);
2757
2758         GetBuffer().Defragment();
2759         GetBuffer().UpdateRanges();     // If items were deleted, ranges need recalculation
2760         GetBuffer().Layout(dc, availableSpace, flags);
2761         GetBuffer().SetDirty(false);
2762
2763         if (!IsFrozen())
2764             SetupScrollbars();
2765     }
2766
2767     return true;
2768 }
2769
2770 /// Is all of the selection bold?
2771 bool wxRichTextCtrl::IsSelectionBold()
2772 {
2773     if (HasSelection())
2774     {
2775         wxRichTextAttr attr;
2776         wxRichTextRange range = GetSelectionRange();
2777         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2778         attr.SetFontWeight(wxBOLD);
2779
2780         return HasCharacterAttributes(range, attr);
2781     }
2782     else
2783     {
2784         // If no selection, then we need to combine current style with default style
2785         // to see what the effect would be if we started typing.
2786         wxRichTextAttr attr;
2787         attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2788
2789         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2790         if (GetStyle(pos, attr))
2791         {
2792             if (IsDefaultStyleShowing())
2793                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2794             return attr.GetFontWeight() == wxBOLD;
2795         }
2796     }
2797     return false;
2798 }
2799
2800 /// Is all of the selection italics?
2801 bool wxRichTextCtrl::IsSelectionItalics()
2802 {
2803     if (HasSelection())
2804     {
2805         wxRichTextRange range = GetSelectionRange();
2806         wxRichTextAttr attr;
2807         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2808         attr.SetFontStyle(wxITALIC);
2809
2810         return HasCharacterAttributes(range, attr);
2811     }
2812     else
2813     {
2814         // If no selection, then we need to combine current style with default style
2815         // to see what the effect would be if we started typing.
2816         wxRichTextAttr attr;
2817         attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2818
2819         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2820         if (GetStyle(pos, attr))
2821         {
2822             if (IsDefaultStyleShowing())
2823                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2824             return attr.GetFontStyle() == wxITALIC;
2825         }
2826     }
2827     return false;
2828 }
2829
2830 /// Is all of the selection underlined?
2831 bool wxRichTextCtrl::IsSelectionUnderlined()
2832 {
2833     if (HasSelection())
2834     {
2835         wxRichTextRange range = GetSelectionRange();
2836         wxRichTextAttr attr;
2837         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2838         attr.SetFontUnderlined(true);
2839
2840         return HasCharacterAttributes(range, attr);
2841     }
2842     else
2843     {
2844         // If no selection, then we need to combine current style with default style
2845         // to see what the effect would be if we started typing.
2846         wxRichTextAttr attr;
2847         attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2848         long pos = GetAdjustedCaretPosition(GetCaretPosition());
2849
2850         if (GetStyle(pos, attr))
2851         {
2852             if (IsDefaultStyleShowing())
2853                 wxRichTextApplyStyle(attr, GetDefaultStyleEx());
2854             return attr.GetFontUnderlined();
2855         }
2856     }
2857     return false;
2858 }
2859
2860 /// Apply bold to the selection
2861 bool wxRichTextCtrl::ApplyBoldToSelection()
2862 {
2863     wxRichTextAttr attr;
2864     attr.SetFlags(wxTEXT_ATTR_FONT_WEIGHT);
2865     attr.SetFontWeight(IsSelectionBold() ? wxNORMAL : wxBOLD);
2866
2867     if (HasSelection())
2868         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2869     else
2870         SetAndShowDefaultStyle(attr);
2871     return true;
2872 }
2873
2874 /// Apply italic to the selection
2875 bool wxRichTextCtrl::ApplyItalicToSelection()
2876 {
2877     wxRichTextAttr attr;
2878     attr.SetFlags(wxTEXT_ATTR_FONT_ITALIC);
2879     attr.SetFontStyle(IsSelectionItalics() ? wxNORMAL : wxITALIC);
2880
2881     if (HasSelection())
2882         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2883     else
2884         SetAndShowDefaultStyle(attr);
2885     return true;
2886 }
2887
2888 /// Apply underline to the selection
2889 bool wxRichTextCtrl::ApplyUnderlineToSelection()
2890 {
2891     wxRichTextAttr attr;
2892     attr.SetFlags(wxTEXT_ATTR_FONT_UNDERLINE);
2893     attr.SetFontUnderlined(!IsSelectionUnderlined());
2894
2895     if (HasSelection())
2896         return SetStyleEx(GetSelectionRange(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_CHARACTERS_ONLY);
2897     else
2898         SetAndShowDefaultStyle(attr);
2899     return true;
2900 }
2901
2902 /// Is all of the selection aligned according to the specified flag?
2903 bool wxRichTextCtrl::IsSelectionAligned(wxTextAttrAlignment alignment)
2904 {
2905     wxRichTextRange range;
2906     if (HasSelection())
2907         range = GetSelectionRange();
2908     else
2909         range = wxRichTextRange(GetCaretPosition()+1, GetCaretPosition()+2);
2910
2911     wxRichTextAttr attr;
2912     attr.SetAlignment(alignment);
2913
2914     return HasParagraphAttributes(range, attr);
2915 }
2916
2917 /// Apply alignment to the selection
2918 bool wxRichTextCtrl::ApplyAlignmentToSelection(wxTextAttrAlignment alignment)
2919 {
2920     wxRichTextAttr attr;
2921     attr.SetAlignment(alignment);
2922     if (HasSelection())
2923         return SetStyle(GetSelectionRange(), attr);
2924     else
2925     {
2926         wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(GetCaretPosition()+1);
2927         if (para)
2928             return SetStyleEx(para->GetRange().FromInternal(), attr, wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE|wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY);
2929     }
2930     return true;
2931 }
2932
2933 /// Apply a named style to the selection
2934 bool wxRichTextCtrl::ApplyStyle(wxRichTextStyleDefinition* def)
2935 {
2936     // Flags are defined within each definition, so only certain
2937     // attributes are applied.
2938     wxRichTextAttr attr(GetStyleSheet() ? def->GetStyleMergedWithBase(GetStyleSheet()) : def->GetStyle());
2939
2940     int flags = wxRICHTEXT_SETSTYLE_WITH_UNDO|wxRICHTEXT_SETSTYLE_OPTIMIZE;
2941
2942     if (def->IsKindOf(CLASSINFO(wxRichTextListStyleDefinition)))
2943     {
2944         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2945
2946         wxRichTextRange range;
2947
2948         if (HasSelection())
2949             range = GetSelectionRange();
2950         else
2951         {
2952             long pos = GetAdjustedCaretPosition(GetCaretPosition());
2953             range = wxRichTextRange(pos, pos+1);
2954         }
2955
2956         return SetListStyle(range, (wxRichTextListStyleDefinition*) def, flags);
2957     }
2958
2959     // Make sure the attr has the style name
2960     if (def->IsKindOf(CLASSINFO(wxRichTextParagraphStyleDefinition)))
2961     {
2962         attr.SetParagraphStyleName(def->GetName());
2963
2964         // If applying a paragraph style, we only want the paragraph nodes to adopt these
2965         // attributes, and not the leaf nodes. This will allow the content (e.g. text)
2966         // to change its style independently.
2967         flags |= wxRICHTEXT_SETSTYLE_PARAGRAPHS_ONLY;
2968     }
2969     else
2970         attr.SetCharacterStyleName(def->GetName());
2971
2972     if (HasSelection())
2973         return SetStyleEx(GetSelectionRange(), attr, flags);
2974     else
2975     {
2976         SetAndShowDefaultStyle(attr);
2977         return true;
2978     }
2979 }
2980
2981 /// Apply the style sheet to the buffer, for example if the styles have changed.
2982 bool wxRichTextCtrl::ApplyStyleSheet(wxRichTextStyleSheet* styleSheet)
2983 {
2984     if (!styleSheet)
2985         styleSheet = GetBuffer().GetStyleSheet();
2986     if (!styleSheet)
2987         return false;
2988
2989     if (GetBuffer().ApplyStyleSheet(styleSheet))
2990     {
2991         GetBuffer().Invalidate(wxRICHTEXT_ALL);
2992         Refresh(false);
2993         return true;
2994     }
2995     else
2996         return false;
2997 }
2998
2999 /// Sets the default style to the style under the cursor
3000 bool wxRichTextCtrl::SetDefaultStyleToCursorStyle()
3001 {
3002     wxTextAttrEx attr;
3003     attr.SetFlags(wxTEXT_ATTR_CHARACTER);
3004
3005     // If at the start of a paragraph, use the next position.
3006     long pos = GetAdjustedCaretPosition(GetCaretPosition());
3007
3008     if (GetUncombinedStyle(pos, attr))
3009     {
3010         SetDefaultStyle(attr);
3011         return true;
3012     }
3013
3014     return false;
3015 }
3016
3017 /// Returns the first visible position in the current view
3018 long wxRichTextCtrl::GetFirstVisiblePosition() const
3019 {
3020     wxRichTextLine* line = GetBuffer().GetLineAtYPosition(GetLogicalPoint(wxPoint(0, 0)).y);
3021     if (line)
3022         return line->GetAbsoluteRange().GetStart();
3023     else
3024         return 0;
3025 }
3026
3027 /// Get the first visible point in the window
3028 wxPoint wxRichTextCtrl::GetFirstVisiblePoint() const
3029 {
3030     int ppuX, ppuY;
3031     int startXUnits, startYUnits;
3032
3033     GetScrollPixelsPerUnit(& ppuX, & ppuY);
3034     GetViewStart(& startXUnits, & startYUnits);
3035
3036     return wxPoint(startXUnits * ppuX, startYUnits * ppuY);
3037 }
3038
3039 /// The adjusted caret position is the character position adjusted to take
3040 /// into account whether we're at the start of a paragraph, in which case
3041 /// style information should be taken from the next position, not current one.
3042 long wxRichTextCtrl::GetAdjustedCaretPosition(long caretPos) const
3043 {
3044     wxRichTextParagraph* para = GetBuffer().GetParagraphAtPosition(caretPos+1);
3045
3046     if (para && (caretPos+1 == para->GetRange().GetStart()))
3047         caretPos ++;
3048     return caretPos;
3049 }
3050
3051 /// Get/set the selection range in character positions. -1, -1 means no selection.
3052 /// The range is in API convention, i.e. a single character selection is denoted
3053 /// by (n, n+1)
3054 wxRichTextRange wxRichTextCtrl::GetSelectionRange() const
3055 {
3056     wxRichTextRange range = GetInternalSelectionRange();
3057     if (range != wxRichTextRange(-2,-2) && range != wxRichTextRange(-1,-1))
3058         range.SetEnd(range.GetEnd() + 1);
3059     return range;
3060 }
3061
3062 void wxRichTextCtrl::SetSelectionRange(const wxRichTextRange& range)
3063 {
3064     wxRichTextRange range1(range);
3065     if (range1 != wxRichTextRange(-2,-2) && range1 != wxRichTextRange(-1,-1) )
3066         range1.SetEnd(range1.GetEnd() - 1);
3067
3068     wxASSERT( range1.GetStart() > range1.GetEnd() );
3069
3070     SetInternalSelectionRange(range1);
3071 }
3072
3073 /// Set list style
3074 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3075 {
3076     return GetBuffer().SetListStyle(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3077 }
3078
3079 bool wxRichTextCtrl::SetListStyle(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3080 {
3081     return GetBuffer().SetListStyle(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3082 }
3083
3084 /// Clear list for given range
3085 bool wxRichTextCtrl::ClearListStyle(const wxRichTextRange& range, int flags)
3086 {
3087     return GetBuffer().ClearListStyle(range.ToInternal(), flags);
3088 }
3089
3090 /// Number/renumber any list elements in the given range
3091 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int startFrom, int specifiedLevel)
3092 {
3093     return GetBuffer().NumberList(range.ToInternal(), def, flags, startFrom, specifiedLevel);
3094 }
3095
3096 bool wxRichTextCtrl::NumberList(const wxRichTextRange& range, const wxString& defName, int flags, int startFrom, int specifiedLevel)
3097 {
3098     return GetBuffer().NumberList(range.ToInternal(), defName, flags, startFrom, specifiedLevel);
3099 }
3100
3101 /// Promote the list items within the given range. promoteBy can be a positive or negative number, e.g. 1 or -1
3102 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, wxRichTextListStyleDefinition* def, int flags, int specifiedLevel)
3103 {
3104     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), def, flags, specifiedLevel);
3105 }
3106
3107 bool wxRichTextCtrl::PromoteList(int promoteBy, const wxRichTextRange& range, const wxString& defName, int flags, int specifiedLevel)
3108 {
3109     return GetBuffer().PromoteList(promoteBy, range.ToInternal(), defName, flags, specifiedLevel);
3110 }
3111
3112 /// Deletes the content in the given range
3113 bool wxRichTextCtrl::Delete(const wxRichTextRange& range)
3114 {
3115     return GetBuffer().DeleteRangeWithUndo(range.ToInternal(), this);
3116 }
3117
3118 const wxArrayString& wxRichTextCtrl::GetAvailableFontNames()
3119 {
3120     if (sm_availableFontNames.GetCount() == 0)
3121     {
3122         sm_availableFontNames = wxFontEnumerator::GetFacenames();
3123         sm_availableFontNames.Sort();
3124     }
3125     return sm_availableFontNames;
3126 }
3127
3128 void wxRichTextCtrl::ClearAvailableFontNames()
3129 {
3130     sm_availableFontNames.Clear();
3131 }
3132
3133 #endif
3134     // wxUSE_RICHTEXT