ext/scintilla/src/Editor.h

   1 // Scintilla source code edit control
   2 /** @file Editor.h
   3  ** Defines the main editor class.
   4  **/
   5 // Copyright 1998-2011 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #ifndef EDITOR_H
   9 #define EDITOR_H
  10
  11 #ifdef SCI_NAMESPACE
  12 namespace Scintilla {
  13 #endif
  14
  15 /**
  16  */
  17 class Caret {
  18 public:
  19         bool active;
  20         bool on;
  21         int period;
  22
  23         Caret();
  24 };
  25
  26 /**
  27  */
  28 class Timer {
  29 public:
  30         bool ticking;
  31         int ticksToWait;
  32         enum {tickSize = 100};
  33         TickerID tickerID;
  34
  35         Timer();
  36 };
  37
  38 /**
  39  */
  40 class Idler {
  41 public:
  42         bool state;
  43         IdlerID idlerID;
  44
  45         Idler();
  46 };
  47
  48 /**
  49  * When platform has a way to generate an event before painting,
  50  * accumulate needed styling range in StyleNeeded to avoid unnecessary work.
  51  */
  52 class StyleNeeded {
  53 public:
  54         bool active;
  55         Position upTo;
  56
  57         StyleNeeded() : active(false), upTo(0) {}
  58         void Reset() {
  59                 active = false;
  60                 upTo = 0;
  61         }
  62         void NeedUpTo(Position pos) {
  63                 if (upTo < pos)
  64                         upTo = pos;
  65         }
  66 };
  67
  68 /**
  69  * Hold a piece of text selected for copying or dragging.
  70  * The text is expected to hold a terminating '\0' and this is counted in len.
  71  */
  72 class SelectionText {
  73 public:
  74         char *s;
  75         int len;
  76         bool rectangular;
  77         bool lineCopy;
  78         int codePage;
  79         int characterSet;
  80         SelectionText() : s(0), len(0), rectangular(false), lineCopy(false), codePage(0), characterSet(0) {}
  81         ~SelectionText() {
  82                 Free();
  83         }
  84         void Free() {
  85                 Set(0, 0, 0, 0, false, false);
  86         }
  87         void Set(char *s_, int len_, int codePage_, int characterSet_, bool rectangular_, bool lineCopy_) {
  88                 delete []s;
  89                 s = s_;
  90                 if (s)
  91                         len = len_;
  92                 else
  93                         len = 0;
  94                 codePage = codePage_;
  95                 characterSet = characterSet_;
  96                 rectangular = rectangular_;
  97                 lineCopy = lineCopy_;
  98         }
  99         void Copy(const char *s_, int len_, int codePage_, int characterSet_, bool rectangular_, bool lineCopy_) {
 100                 delete []s;
 101                 s = 0;
 102                 s = new char[len_];
 103                 len = len_;
 104                 for (int i = 0; i < len_; i++) {
 105                         s[i] = s_[i];
 106                 }
 107                 codePage = codePage_;
 108                 characterSet = characterSet_;
 109                 rectangular = rectangular_;
 110                 lineCopy = lineCopy_;
 111         }
 112         void Copy(const SelectionText &other) {
 113                 Copy(other.s, other.len, other.codePage, other.characterSet, other.rectangular, other.lineCopy);
 114         }
 115 };
 116
 117 /**
 118  */
 119 class Editor : public DocWatcher {
 120         // Private so Editor objects can not be copied
 121         Editor(const Editor &);
 122         Editor &operator=(const Editor &);
 123
 124 protected:      // ScintillaBase subclass needs access to much of Editor
 125
 126         /** On GTK+, Scintilla is a container widget holding two scroll bars
 127          * whereas on Windows there is just one window with both scroll bars turned on. */
 128         Window wMain;   ///< The Scintilla parent window
 129
 130         /** Style resources may be expensive to allocate so are cached between uses.
 131          * When a style attribute is changed, this cache is flushed. */
 132         bool stylesValid;
 133         ViewStyle vs;
 134         int technology;
 135         Point sizeRGBAImage;
 136         float scaleRGBAImage;
 137
 138         int printMagnification;
 139         int printColourMode;
 140         int printWrapState;
 141         int cursorMode;
 142         int controlCharSymbol;
 143
 144         // Highlight current folding block
 145         HighlightDelimiter highlightDelimiter;
 146
 147         bool hasFocus;
 148         bool hideSelection;
 149         bool inOverstrike;
 150         bool mouseDownCaptures;
 151
 152         /** In bufferedDraw mode, graphics operations are drawn to a pixmap and then copied to
 153          * the screen. This avoids flashing but is about 30% slower. */
 154         bool bufferedDraw;
 155         /** In twoPhaseDraw mode, drawing is performed in two phases, first the background
 156         * and then the foreground. This avoids chopping off characters that overlap the next run. */
 157         bool twoPhaseDraw;
 158
 159         int xOffset;            ///< Horizontal scrolled amount in pixels
 160         int xCaretMargin;       ///< Ensure this many pixels visible on both sides of caret
 161         bool horizontalScrollBarVisible;
 162         int scrollWidth;
 163         bool trackLineWidth;
 164         int lineWidthMaxSeen;
 165         bool verticalScrollBarVisible;
 166         bool endAtLastLine;
 167         int caretSticky;
 168         int marginOptions;
 169         bool multipleSelection;
 170         bool additionalSelectionTyping;
 171         int multiPasteMode;
 172         bool additionalCaretsBlink;
 173         bool additionalCaretsVisible;
 174
 175         int virtualSpaceOptions;
 176
 177         Surface *pixmapLine;
 178         Surface *pixmapSelMargin;
 179         Surface *pixmapSelPattern;
 180         Surface *pixmapIndentGuide;
 181         Surface *pixmapIndentGuideHighlight;
 182
 183         LineLayoutCache llc;
 184         PositionCache posCache;
 185
 186         KeyMap kmap;
 187
 188         Caret caret;
 189         Timer timer;
 190         Timer autoScrollTimer;
 191         enum { autoScrollDelay = 200 };
 192
 193         Idler idler;
 194
 195         Point lastClick;
 196         unsigned int lastClickTime;
 197         int dwellDelay;
 198         int ticksToDwell;
 199         bool dwelling;
 200         enum { selChar, selWord, selSubLine, selWholeLine } selectionType;
 201         Point ptMouseLast;
 202         enum { ddNone, ddInitial, ddDragging } inDragDrop;
 203         bool dropWentOutside;
 204         SelectionPosition posDrag;
 205         SelectionPosition posDrop;
 206         int hotSpotClickPos;
 207         int lastXChosen;
 208         int lineAnchorPos;
 209         int originalAnchorPos;
 210         int wordSelectAnchorStartPos;
 211         int wordSelectAnchorEndPos;
 212         int wordSelectInitialCaretPos;
 213         int targetStart;
 214         int targetEnd;
 215         int searchFlags;
 216         int topLine;
 217         int posTopLine;
 218         int lengthForEncode;
 219
 220         int needUpdateUI;
 221         Position braces[2];
 222         int bracesMatchStyle;
 223         int highlightGuideColumn;
 224
 225         int theEdge;
 226
 227         enum { notPainting, painting, paintAbandoned } paintState;
 228         PRectangle rcPaint;
 229         bool paintingAllText;
 230         bool willRedrawAll;
 231         StyleNeeded styleNeeded;
 232
 233         int modEventMask;
 234
 235         SelectionText drag;
 236         Selection sel;
 237         bool primarySelection;
 238
 239         int caretXPolicy;
 240         int caretXSlop; ///< Ensure this many pixels visible on both sides of caret
 241
 242         int caretYPolicy;
 243         int caretYSlop; ///< Ensure this many lines visible on both sides of caret
 244
 245         int visiblePolicy;
 246         int visibleSlop;
 247
 248         int searchAnchor;
 249
 250         bool recordingMacro;
 251
 252         int foldFlags;
 253         ContractionState cs;
 254
 255         // Hotspot support
 256         int hsStart;
 257         int hsEnd;
 258
 259         // Wrapping support
 260         enum { eWrapNone, eWrapWord, eWrapChar } wrapState;
 261         enum { wrapLineLarge = 0x7ffffff };
 262         int wrapWidth;
 263         int wrapStart;
 264         int wrapEnd;
 265         int wrapVisualFlags;
 266         int wrapVisualFlagsLocation;
 267         int wrapVisualStartIndent;
 268         int wrapIndentMode; // SC_WRAPINDENT_FIXED, _SAME, _INDENT
 269
 270         bool convertPastes;
 271
 272         int marginNumberPadding; // the right-side padding of the number margin
 273         int ctrlCharPadding; // the padding around control character text blobs
 274         int lastSegItalicsOffset; // the offset so as not to clip italic characters at EOLs
 275
 276         Document *pdoc;
 277
 278         Editor();
 279         virtual ~Editor();
 280         virtual void Initialise() = 0;
 281         virtual void Finalise();
 282
 283         void InvalidateStyleData();
 284         void InvalidateStyleRedraw();
 285         void RefreshStyleData();
 286         void DropGraphics(bool freeObjects);
 287         void AllocateGraphics();
 288
 289         virtual PRectangle GetClientRectangle();
 290         PRectangle GetTextRectangle();
 291
 292         int LinesOnScreen();
 293         int LinesToScroll();
 294         int MaxScrollPos();
 295         SelectionPosition ClampPositionIntoDocument(SelectionPosition sp) const;
 296         Point LocationFromPosition(SelectionPosition pos);
 297         Point LocationFromPosition(int pos);
 298         int XFromPosition(int pos);
 299         int XFromPosition(SelectionPosition sp);
 300         SelectionPosition SPositionFromLocation(Point pt, bool canReturnInvalid=false, bool charPosition=false, bool virtualSpace=true);
 301         int PositionFromLocation(Point pt, bool canReturnInvalid=false, bool charPosition=false);
 302         SelectionPosition SPositionFromLineX(int lineDoc, int x);
 303         int PositionFromLineX(int line, int x);
 304         int LineFromLocation(Point pt);
 305         void SetTopLine(int topLineNew);
 306
 307         bool AbandonPaint();
 308         void RedrawRect(PRectangle rc);
 309         void Redraw();
 310         void RedrawSelMargin(int line=-1, bool allAfter=false);
 311         PRectangle RectangleFromRange(int start, int end);
 312         void InvalidateRange(int start, int end);
 313
 314         bool UserVirtualSpace() const {
 315                 return ((virtualSpaceOptions & SCVS_USERACCESSIBLE) != 0);
 316         }
 317         int CurrentPosition();
 318         bool SelectionEmpty();
 319         SelectionPosition SelectionStart();
 320         SelectionPosition SelectionEnd();
 321         void SetRectangularRange();
 322         void ThinRectangularRange();
 323         void InvalidateSelection(SelectionRange newMain, bool invalidateWholeSelection=false);
 324         void SetSelection(SelectionPosition currentPos_, SelectionPosition anchor_);
 325         void SetSelection(int currentPos_, int anchor_);
 326         void SetSelection(SelectionPosition currentPos_);
 327         void SetSelection(int currentPos_);
 328         void SetEmptySelection(SelectionPosition currentPos_);
 329         void SetEmptySelection(int currentPos_);
 330         bool RangeContainsProtected(int start, int end) const;
 331         bool SelectionContainsProtected();
 332         int MovePositionOutsideChar(int pos, int moveDir, bool checkLineEnd=true) const;
 333         SelectionPosition MovePositionOutsideChar(SelectionPosition pos, int moveDir, bool checkLineEnd=true) const;
 334         int MovePositionTo(SelectionPosition newPos, Selection::selTypes sel=Selection::noSel, bool ensureVisible=true);
 335         int MovePositionTo(int newPos, Selection::selTypes sel=Selection::noSel, bool ensureVisible=true);
 336         SelectionPosition MovePositionSoVisible(SelectionPosition pos, int moveDir);
 337         SelectionPosition MovePositionSoVisible(int pos, int moveDir);
 338         Point PointMainCaret();
 339         void SetLastXChosen();
 340
 341         void ScrollTo(int line, bool moveThumb=true);
 342         virtual void ScrollText(int linesToMove);
 343         void HorizontalScrollTo(int xPos);
 344         void VerticalCentreCaret();
 345         void MoveSelectedLines(int lineDelta);
 346         void MoveSelectedLinesUp();
 347         void MoveSelectedLinesDown();
 348         void MoveCaretInsideView(bool ensureVisible=true);
 349         int DisplayFromPosition(int pos);
 350
 351         struct XYScrollPosition {
 352                 int xOffset;
 353                 int topLine;
 354                 XYScrollPosition(int xOffset_, int topLine_) : xOffset(xOffset_), topLine(topLine_) {}
 355         };
 356         XYScrollPosition XYScrollToMakeVisible(const bool useMargin, const bool vert, const bool horiz);
 357         void SetXYScroll(XYScrollPosition newXY);
 358         void EnsureCaretVisible(bool useMargin=true, bool vert=true, bool horiz=true);
 359         void ShowCaretAtCurrentPosition();
 360         void DropCaret();
 361         void InvalidateCaret();
 362         virtual void UpdateSystemCaret();
 363
 364         void NeedWrapping(int docLineStart = 0, int docLineEnd = wrapLineLarge);
 365         bool WrapOneLine(Surface *surface, int lineToWrap);
 366         bool WrapLines(bool fullWrap, int priorityWrapLineStart);
 367         void LinesJoin();
 368         void LinesSplit(int pixelWidth);
 369
 370         int SubstituteMarkerIfEmpty(int markerCheck, int markerDefault);
 371         void PaintSelMargin(Surface *surface, PRectangle &rc);
 372         LineLayout *RetrieveLineLayout(int lineNumber);
 373         void LayoutLine(int line, Surface *surface, ViewStyle &vstyle, LineLayout *ll,
 374                 int width=LineLayout::wrapWidthInfinite);
 375         ColourDesired SelectionBackground(ViewStyle &vsDraw, bool main);
 376         ColourDesired TextBackground(ViewStyle &vsDraw, bool overrideBackground, ColourDesired background, int inSelection, bool inHotspot, int styleMain, int i, LineLayout *ll);
 377         void DrawIndentGuide(Surface *surface, int lineVisible, int lineHeight, int start, PRectangle rcSegment, bool highlight);
 378         void DrawWrapMarker(Surface *surface, PRectangle rcPlace, bool isEndMarker, ColourDesired wrapColour);
 379         void DrawEOL(Surface *surface, ViewStyle &vsDraw, PRectangle rcLine, LineLayout *ll,
 380                 int line, int lineEnd, int xStart, int subLine, XYACCUMULATOR subLineStart,
 381                 bool overrideBackground, ColourDesired background,
 382                 bool drawWrapMark, ColourDesired wrapColour);
 383         void DrawIndicator(int indicNum, int startPos, int endPos, Surface *surface, ViewStyle &vsDraw,
 384                 int xStart, PRectangle rcLine, LineLayout *ll, int subLine);
 385         void DrawIndicators(Surface *surface, ViewStyle &vsDraw, int line, int xStart,
 386                 PRectangle rcLine, LineLayout *ll, int subLine, int lineEnd, bool under);
 387         void DrawAnnotation(Surface *surface, ViewStyle &vsDraw, int line, int xStart,
 388         PRectangle rcLine, LineLayout *ll, int subLine);
 389         void DrawLine(Surface *surface, ViewStyle &vsDraw, int line, int lineVisible, int xStart,
 390                 PRectangle rcLine, LineLayout *ll, int subLine);
 391         void DrawBlockCaret(Surface *surface, ViewStyle &vsDraw, LineLayout *ll, int subLine,
 392                 int xStart, int offset, int posCaret, PRectangle rcCaret, ColourDesired caretColour);
 393         void DrawCarets(Surface *surface, ViewStyle &vsDraw, int line, int xStart,
 394                 PRectangle rcLine, LineLayout *ll, int subLine);
 395         void RefreshPixMaps(Surface *surfaceWindow);
 396         void Paint(Surface *surfaceWindow, PRectangle rcArea);
 397         long FormatRange(bool draw, Sci_RangeToFormat *pfr);
 398         int TextWidth(int style, const char *text);
 399
 400         virtual void SetVerticalScrollPos() = 0;
 401         virtual void SetHorizontalScrollPos() = 0;
 402         virtual bool ModifyScrollBars(int nMax, int nPage) = 0;
 403         virtual void ReconfigureScrollBars();
 404         void SetScrollBars();
 405         void ChangeSize();
 406
 407         void FilterSelections();
 408         int InsertSpace(int position, unsigned int spaces);
 409         void AddChar(char ch);
 410         virtual void AddCharUTF(char *s, unsigned int len, bool treatAsDBCS=false);
 411         void InsertPaste(SelectionPosition selStart, const char *text, int len);
 412         void ClearSelection(bool retainMultipleSelections=false);
 413         void ClearAll();
 414         void ClearDocumentStyle();
 415         void Cut();
 416         void PasteRectangular(SelectionPosition pos, const char *ptr, int len);
 417         virtual void Copy() = 0;
 418         virtual void CopyAllowLine();
 419         virtual bool CanPaste();
 420         virtual void Paste() = 0;
 421         void Clear();
 422         void SelectAll();
 423         void Undo();
 424         void Redo();
 425         void DelChar();
 426         void DelCharBack(bool allowLineStartDeletion);
 427         virtual void ClaimSelection() = 0;
 428
 429         virtual void NotifyChange() = 0;
 430         virtual void NotifyFocus(bool focus);
 431         virtual void SetCtrlID(int identifier);
 432         virtual int GetCtrlID() { return ctrlID; }
 433         virtual void NotifyParent(SCNotification scn) = 0;
 434         virtual void NotifyParent(SCNotification * scn) = 0;
 435         virtual void NotifyStyleToNeeded(int endStyleNeeded);
 436         void NotifyChar(int ch);
 437         void NotifySavePoint(bool isSavePoint);
 438         void NotifyModifyAttempt();
 439         virtual void NotifyDoubleClick(Point pt, bool shift, bool ctrl, bool alt);
 440         void NotifyHotSpotClicked(int position, bool shift, bool ctrl, bool alt);
 441         void NotifyHotSpotDoubleClicked(int position, bool shift, bool ctrl, bool alt);
 442         void NotifyHotSpotReleaseClick(int position, bool shift, bool ctrl, bool alt);
 443         void NotifyUpdateUI();
 444         void NotifyPainted();
 445         void NotifyIndicatorClick(bool click, int position, bool shift, bool ctrl, bool alt);
 446         bool NotifyMarginClick(Point pt, bool shift, bool ctrl, bool alt);
 447         void NotifyNeedShown(int pos, int len);
 448         void NotifyDwelling(Point pt, bool state);
 449         void NotifyZoom();
 450
 451         void NotifyModifyAttempt(Document *document, void *userData);
 452         void NotifySavePoint(Document *document, void *userData, bool atSavePoint);
 453         void CheckModificationForWrap(DocModification mh);
 454         void NotifyModified(Document *document, DocModification mh, void *userData);
 455         void NotifyDeleted(Document *document, void *userData);
 456         void NotifyStyleNeeded(Document *doc, void *userData, int endPos);
 457         void NotifyLexerChanged(Document *doc, void *userData);
 458         void NotifyErrorOccurred(Document *doc, void *userData, int status);
 459         void NotifyMacroRecord(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 460
 461         void ContainerNeedsUpdate(int flags);
 462         void PageMove(int direction, Selection::selTypes sel=Selection::noSel, bool stuttered = false);
 463         enum { cmSame, cmUpper, cmLower } caseMap;
 464         virtual std::string CaseMapString(const std::string &s, int caseMapping);
 465         void ChangeCaseOfSelection(int caseMapping);
 466         void LineTranspose();
 467         void Duplicate(bool forLine);
 468         virtual void CancelModes();
 469         void NewLine();
 470         void CursorUpOrDown(int direction, Selection::selTypes sel=Selection::noSel);
 471         void ParaUpOrDown(int direction, Selection::selTypes sel=Selection::noSel);
 472         int StartEndDisplayLine(int pos, bool start);
 473         virtual int KeyCommand(unsigned int iMessage);
 474         virtual int KeyDefault(int /* key */, int /*modifiers*/);
 475         int KeyDownWithModifiers(int key, int modifiers, bool *consumed);
 476         int KeyDown(int key, bool shift, bool ctrl, bool alt, bool *consumed=0);
 477
 478         void Indent(bool forwards);
 479
 480         virtual CaseFolder *CaseFolderForEncoding();
 481         long FindText(uptr_t wParam, sptr_t lParam);
 482         void SearchAnchor();
 483         long SearchText(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 484         long SearchInTarget(const char *text, int length);
 485         void GoToLine(int lineNo);
 486
 487         virtual void CopyToClipboard(const SelectionText &selectedText) = 0;
 488         char *CopyRange(int start, int end);
 489         std::string RangeText(int start, int end) const;
 490         void CopySelectionRange(SelectionText *ss, bool allowLineCopy=false);
 491         void CopyRangeToClipboard(int start, int end);
 492         void CopyText(int length, const char *text);
 493         void SetDragPosition(SelectionPosition newPos);
 494         virtual void DisplayCursor(Window::Cursor c);
 495         virtual bool DragThreshold(Point ptStart, Point ptNow);
 496         virtual void StartDrag();
 497         void DropAt(SelectionPosition position, const char *value, bool moving, bool rectangular);
 498         /** PositionInSelection returns true if position in selection. */
 499         bool PositionInSelection(int pos);
 500         bool PointInSelection(Point pt);
 501         bool PointInSelMargin(Point pt);
 502         Window::Cursor GetMarginCursor(Point pt);
 503         void TrimAndSetSelection(int currentPos_, int anchor_);
 504         void LineSelection(int lineCurrentPos_, int lineAnchorPos_, bool wholeLine);
 505         void WordSelection(int pos);
 506         void DwellEnd(bool mouseMoved);
 507         void MouseLeave();
 508         virtual void ButtonDown(Point pt, unsigned int curTime, bool shift, bool ctrl, bool alt);
 509         void ButtonMove(Point pt);
 510         void ButtonUp(Point pt, unsigned int curTime, bool ctrl);
 511
 512         void Tick();
 513         bool Idle();
 514         virtual void SetTicking(bool on) = 0;
 515         virtual bool SetIdle(bool) { return false; }
 516         virtual void SetMouseCapture(bool on) = 0;
 517         virtual bool HaveMouseCapture() = 0;
 518         void SetFocusState(bool focusState);
 519
 520         int PositionAfterArea(PRectangle rcArea);
 521         void StyleToPositionInView(Position pos);
 522         void IdleStyling();
 523         virtual void QueueStyling(int upTo);
 524
 525         virtual bool PaintContains(PRectangle rc);
 526         bool PaintContainsMargin();
 527         void CheckForChangeOutsidePaint(Range r);
 528         void SetBraceHighlight(Position pos0, Position pos1, int matchStyle);
 529
 530         void SetAnnotationHeights(int start, int end);
 531         void SetDocPointer(Document *document);
 532
 533         void SetAnnotationVisible(int visible);
 534
 535         void Expand(int &line, bool doExpand);
 536         void ToggleContraction(int line);
 537         int ContractedFoldNext(int lineStart);
 538         void EnsureLineVisible(int lineDoc, bool enforcePolicy);
 539         int GetTag(char *tagValue, int tagNumber);
 540         int ReplaceTarget(bool replacePatterns, const char *text, int length=-1);
 541
 542         bool PositionIsHotspot(int position);
 543         bool PointIsHotspot(Point pt);
 544         void SetHotSpotRange(Point *pt);
 545         void GetHotSpotRange(int &hsStart, int &hsEnd);
 546
 547         int CodePage() const;
 548         virtual bool ValidCodePage(int /* codePage */) const { return true; }
 549         int WrapCount(int line);
 550         void AddStyledText(char *buffer, int appendLength);
 551
 552         virtual sptr_t DefWndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam) = 0;
 553         void StyleSetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 554         sptr_t StyleGetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 555
 556         static const char *StringFromEOLMode(int eolMode);
 557
 558         static sptr_t StringResult(sptr_t lParam, const char *val);
 559
 560 public:
 561         // Public so the COM thunks can access it.
 562         bool IsUnicodeMode() const;
 563         // Public so scintilla_send_message can use it.
 564         virtual sptr_t WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 565         // Public so scintilla_set_id can use it.
 566         int ctrlID;
 567         // Public so COM methods for drag and drop can set it.
 568         int errorStatus;
 569         friend class AutoSurface;
 570         friend class SelectionLineIterator;
 571 };
 572
 573 /**
 574  * A smart pointer class to ensure Surfaces are set up and deleted correctly.
 575  */
 576 class AutoSurface {
 577 private:
 578         Surface *surf;
 579 public:
 580         AutoSurface(Editor *ed, int technology = -1) : surf(0) {
 581                 if (ed->wMain.GetID()) {
 582                         surf = Surface::Allocate(technology != -1 ? technology : ed->technology);
 583                         if (surf) {
 584                                 surf->Init(ed->wMain.GetID());
 585                                 surf->SetUnicodeMode(SC_CP_UTF8 == ed->CodePage());
 586                                 surf->SetDBCSMode(ed->CodePage());
 587                         }
 588                 }
 589         }
 590         AutoSurface(SurfaceID sid, Editor *ed, int technology = -1) : surf(0) {
 591                 if (ed->wMain.GetID()) {
 592                         surf = Surface::Allocate(technology != -1 ? technology : ed->technology);
 593                         if (surf) {
 594                                 surf->Init(sid, ed->wMain.GetID());
 595                                 surf->SetUnicodeMode(SC_CP_UTF8 == ed->CodePage());
 596                                 surf->SetDBCSMode(ed->CodePage());
 597                         }
 598                 }
 599         }
 600         ~AutoSurface() {
 601                 delete surf;
 602         }
 603         Surface *operator->() const {
 604                 return surf;
 605         }
 606         operator Surface *() const {
 607                 return surf;
 608         }
 609 };
 610
 611 #ifdef SCI_NAMESPACE
 612 }
 613 #endif
 614
 615 #endif