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 Timer {
  18 public:
  19         bool ticking;
  20         int ticksToWait;
  21         enum {tickSize = 100};
  22         TickerID tickerID;
  23
  24         Timer();
  25 };
  26
  27 /**
  28  */
  29 class Idler {
  30 public:
  31         bool state;
  32         IdlerID idlerID;
  33
  34         Idler();
  35 };
  36
  37 /**
  38  * When platform has a way to generate an event before painting,
  39  * accumulate needed styling range and other work items in
  40  * WorkNeeded to avoid unnecessary work inside paint handler
  41  */
  42 class WorkNeeded {
  43 public:
  44         enum workItems {
  45                 workNone=0,
  46                 workStyle=1,
  47                 workUpdateUI=2
  48         };
  49         bool active;
  50         enum workItems items;
  51         Position upTo;
  52
  53         WorkNeeded() : active(false), items(workNone), upTo(0) {}
  54         void Reset() {
  55                 active = false;
  56                 items = workNone;
  57                 upTo = 0;
  58         }
  59         void Need(workItems items_, Position pos) {
  60                 if ((items_ & workStyle) && (upTo < pos))
  61                         upTo = pos;
  62                 items = static_cast<workItems>(items | items_);
  63         }
  64 };
  65
  66 /**
  67  * Hold a piece of text selected for copying or dragging, along with encoding and selection format information.
  68  */
  69 class SelectionText {
  70         std::string s;
  71 public:
  72         bool rectangular;
  73         bool lineCopy;
  74         int codePage;
  75         int characterSet;
  76         SelectionText() : rectangular(false), lineCopy(false), codePage(0), characterSet(0) {}
  77         ~SelectionText() {
  78         }
  79         void Clear() {
  80                 s.clear();
  81                 rectangular = false;
  82                 lineCopy = false;
  83                 codePage = 0;
  84                 characterSet = 0;
  85         }
  86         void Copy(const std::string &s_, int codePage_, int characterSet_, bool rectangular_, bool lineCopy_) {
  87                 s = s_;
  88                 codePage = codePage_;
  89                 characterSet = characterSet_;
  90                 rectangular = rectangular_;
  91                 lineCopy = lineCopy_;
  92                 FixSelectionForClipboard();
  93         }
  94         void Copy(const SelectionText &other) {
  95                 Copy(other.s, other.codePage, other.characterSet, other.rectangular, other.lineCopy);
  96         }
  97         const char *Data() const {
  98                 return s.c_str();
  99         }
 100         size_t Length() const {
 101                 return s.length();
 102         }
 103         size_t LengthWithTerminator() const {
 104                 return s.length() + 1;
 105         }
 106         bool Empty() const {
 107                 return s.empty();
 108         }
 109 private:
 110         void FixSelectionForClipboard() {
 111                 // To avoid truncating the contents of the clipboard when pasted where the
 112                 // clipboard contains NUL characters, replace NUL characters by spaces.
 113                 std::replace(s.begin(), s.end(), '\0', ' ');
 114         }
 115 };
 116
 117 struct WrapPending {
 118         // The range of lines that need to be wrapped
 119         enum { lineLarge = 0x7ffffff };
 120         int start;      // When there are wraps pending, will be in document range
 121         int end;        // May be lineLarge to indicate all of document after start
 122         WrapPending() {
 123                 start = lineLarge;
 124                 end = lineLarge;
 125         }
 126         void Reset() {
 127                 start = lineLarge;
 128                 end = lineLarge;
 129         }
 130         void Wrapped(int line) {
 131                 if (start == line)
 132                         start++;
 133         }
 134         bool NeedsWrap() const {
 135                 return start < end;
 136         }
 137         bool AddRange(int lineStart, int lineEnd) {
 138                 const bool neededWrap = NeedsWrap();
 139                 bool changed = false;
 140                 if (start > lineStart) {
 141                         start = lineStart;
 142                         changed = true;
 143                 }
 144                 if ((end < lineEnd) || !neededWrap) {
 145                         end = lineEnd;
 146                         changed = true;
 147                 }
 148                 return changed;
 149         }
 150 };
 151
 152 /**
 153  */
 154 class Editor : public EditModel, public DocWatcher {
 155         // Private so Editor objects can not be copied
 156         explicit Editor(const Editor &);
 157         Editor &operator=(const Editor &);
 158
 159 protected:      // ScintillaBase subclass needs access to much of Editor
 160
 161         /** On GTK+, Scintilla is a container widget holding two scroll bars
 162          * whereas on Windows there is just one window with both scroll bars turned on. */
 163         Window wMain;   ///< The Scintilla parent window
 164         Window wMargin; ///< May be separate when using a scroll view for wMain
 165
 166         /** Style resources may be expensive to allocate so are cached between uses.
 167          * When a style attribute is changed, this cache is flushed. */
 168         bool stylesValid;
 169         ViewStyle vs;
 170         int technology;
 171         Point sizeRGBAImage;
 172         float scaleRGBAImage;
 173
 174         MarginView marginView;
 175         EditView view;
 176
 177         int cursorMode;
 178
 179         bool hasFocus;
 180         bool mouseDownCaptures;
 181
 182         int xCaretMargin;       ///< Ensure this many pixels visible on both sides of caret
 183         bool horizontalScrollBarVisible;
 184         int scrollWidth;
 185         bool verticalScrollBarVisible;
 186         bool endAtLastLine;
 187         int caretSticky;
 188         int marginOptions;
 189         bool mouseSelectionRectangularSwitch;
 190         bool multipleSelection;
 191         bool additionalSelectionTyping;
 192         int multiPasteMode;
 193
 194         int virtualSpaceOptions;
 195
 196         KeyMap kmap;
 197
 198         Timer timer;
 199         Timer autoScrollTimer;
 200         enum { autoScrollDelay = 200 };
 201
 202         Idler idler;
 203
 204         Point lastClick;
 205         unsigned int lastClickTime;
 206         Point doubleClickCloseThreshold;
 207         int dwellDelay;
 208         int ticksToDwell;
 209         bool dwelling;
 210         enum { selChar, selWord, selSubLine, selWholeLine } selectionType;
 211         Point ptMouseLast;
 212         enum { ddNone, ddInitial, ddDragging } inDragDrop;
 213         bool dropWentOutside;
 214         SelectionPosition posDrop;
 215         int hotSpotClickPos;
 216         int lastXChosen;
 217         int lineAnchorPos;
 218         int originalAnchorPos;
 219         int wordSelectAnchorStartPos;
 220         int wordSelectAnchorEndPos;
 221         int wordSelectInitialCaretPos;
 222         int targetStart;
 223         int targetEnd;
 224         int searchFlags;
 225         int topLine;
 226         int posTopLine;
 227         int lengthForEncode;
 228
 229         int needUpdateUI;
 230
 231         enum { notPainting, painting, paintAbandoned } paintState;
 232         bool paintAbandonedByStyling;
 233         PRectangle rcPaint;
 234         bool paintingAllText;
 235         bool willRedrawAll;
 236         WorkNeeded workNeeded;
 237
 238         int modEventMask;
 239
 240         SelectionText drag;
 241
 242         int caretXPolicy;
 243         int caretXSlop; ///< Ensure this many pixels visible on both sides of caret
 244
 245         int caretYPolicy;
 246         int caretYSlop; ///< Ensure this many lines visible on both sides of caret
 247
 248         int visiblePolicy;
 249         int visibleSlop;
 250
 251         int searchAnchor;
 252
 253         bool recordingMacro;
 254
 255         int foldAutomatic;
 256
 257         // Wrapping support
 258         WrapPending wrapPending;
 259
 260         bool convertPastes;
 261
 262         Editor();
 263         virtual ~Editor();
 264         virtual void Initialise() = 0;
 265         virtual void Finalise();
 266
 267         void InvalidateStyleData();
 268         void InvalidateStyleRedraw();
 269         void RefreshStyleData();
 270         void SetRepresentations();
 271         void DropGraphics(bool freeObjects);
 272         void AllocateGraphics();
 273
 274         // The top left visible point in main window coordinates. Will be 0,0 except for
 275         // scroll views where it will be equivalent to the current scroll position.
 276         virtual Point GetVisibleOriginInMain() const;
 277         Point DocumentPointFromView(Point ptView) const;  // Convert a point from view space to document
 278         int TopLineOfMain() const;   // Return the line at Main's y coordinate 0
 279         virtual PRectangle GetClientRectangle() const;
 280         virtual PRectangle GetClientDrawingRectangle();
 281         PRectangle GetTextRectangle() const;
 282
 283         virtual int LinesOnScreen() const;
 284         int LinesToScroll() const;
 285         int MaxScrollPos() const;
 286         SelectionPosition ClampPositionIntoDocument(SelectionPosition sp) const;
 287         Point LocationFromPosition(SelectionPosition pos);
 288         Point LocationFromPosition(int pos);
 289         int XFromPosition(int pos);
 290         int XFromPosition(SelectionPosition sp);
 291         SelectionPosition SPositionFromLocation(Point pt, bool canReturnInvalid=false, bool charPosition=false, bool virtualSpace=true);
 292         int PositionFromLocation(Point pt, bool canReturnInvalid = false, bool charPosition = false);
 293         SelectionPosition SPositionFromLineX(int lineDoc, int x);
 294         int PositionFromLineX(int line, int x);
 295         int LineFromLocation(Point pt) const;
 296         void SetTopLine(int topLineNew);
 297
 298         virtual bool AbandonPaint();
 299         virtual void RedrawRect(PRectangle rc);
 300         virtual void DiscardOverdraw();
 301         virtual void Redraw();
 302         void RedrawSelMargin(int line=-1, bool allAfter=false);
 303         PRectangle RectangleFromRange(Range r, int overlap);
 304         void InvalidateRange(int start, int end);
 305
 306         bool UserVirtualSpace() const {
 307                 return ((virtualSpaceOptions & SCVS_USERACCESSIBLE) != 0);
 308         }
 309         int CurrentPosition() const;
 310         bool SelectionEmpty() const;
 311         SelectionPosition SelectionStart();
 312         SelectionPosition SelectionEnd();
 313         void SetRectangularRange();
 314         void ThinRectangularRange();
 315         void InvalidateSelection(SelectionRange newMain, bool invalidateWholeSelection=false);
 316         void InvalidateWholeSelection();
 317         void SetSelection(SelectionPosition currentPos_, SelectionPosition anchor_);
 318         void SetSelection(int currentPos_, int anchor_);
 319         void SetSelection(SelectionPosition currentPos_);
 320         void SetSelection(int currentPos_);
 321         void SetEmptySelection(SelectionPosition currentPos_);
 322         void SetEmptySelection(int currentPos_);
 323         enum AddNumber { addOne, addEach };
 324         void MultipleSelectAdd(AddNumber addNumber);
 325         bool RangeContainsProtected(int start, int end) const;
 326         bool SelectionContainsProtected();
 327         int MovePositionOutsideChar(int pos, int moveDir, bool checkLineEnd=true) const;
 328         SelectionPosition MovePositionOutsideChar(SelectionPosition pos, int moveDir, bool checkLineEnd=true) const;
 329         void MovedCaret(SelectionPosition newPos, SelectionPosition previousPos, bool ensureVisible);
 330         void MovePositionTo(SelectionPosition newPos, Selection::selTypes selt=Selection::noSel, bool ensureVisible=true);
 331         void MovePositionTo(int newPos, Selection::selTypes selt=Selection::noSel, bool ensureVisible=true);
 332         SelectionPosition MovePositionSoVisible(SelectionPosition pos, int moveDir);
 333         SelectionPosition MovePositionSoVisible(int pos, int moveDir);
 334         Point PointMainCaret();
 335         void SetLastXChosen();
 336
 337         void ScrollTo(int line, bool moveThumb=true);
 338         virtual void ScrollText(int linesToMove);
 339         void HorizontalScrollTo(int xPos);
 340         void VerticalCentreCaret();
 341         void MoveSelectedLines(int lineDelta);
 342         void MoveSelectedLinesUp();
 343         void MoveSelectedLinesDown();
 344         void MoveCaretInsideView(bool ensureVisible=true);
 345         int DisplayFromPosition(int pos);
 346
 347         struct XYScrollPosition {
 348                 int xOffset;
 349                 int topLine;
 350                 XYScrollPosition(int xOffset_, int topLine_) : xOffset(xOffset_), topLine(topLine_) {}
 351                 bool operator==(const XYScrollPosition &other) const {
 352                         return (xOffset == other.xOffset) && (topLine == other.topLine);
 353                 }
 354         };
 355         enum XYScrollOptions {
 356                 xysUseMargin=0x1,
 357                 xysVertical=0x2,
 358                 xysHorizontal=0x4,
 359                 xysDefault=xysUseMargin|xysVertical|xysHorizontal};
 360         XYScrollPosition XYScrollToMakeVisible(const SelectionRange &range, const XYScrollOptions options);
 361         void SetXYScroll(XYScrollPosition newXY);
 362         void EnsureCaretVisible(bool useMargin=true, bool vert=true, bool horiz=true);
 363         void ScrollRange(SelectionRange range);
 364         void ShowCaretAtCurrentPosition();
 365         void DropCaret();
 366         void CaretSetPeriod(int period);
 367         void InvalidateCaret();
 368         virtual void UpdateSystemCaret();
 369
 370         bool Wrapping() const;
 371         void NeedWrapping(int docLineStart=0, int docLineEnd=WrapPending::lineLarge);
 372         bool WrapOneLine(Surface *surface, int lineToWrap);
 373         enum wrapScope {wsAll, wsVisible, wsIdle};
 374         bool WrapLines(enum wrapScope ws);
 375         void LinesJoin();
 376         void LinesSplit(int pixelWidth);
 377
 378         void PaintSelMargin(Surface *surface, PRectangle &rc);
 379         void RefreshPixMaps(Surface *surfaceWindow);
 380         void Paint(Surface *surfaceWindow, PRectangle rcArea);
 381         long FormatRange(bool draw, Sci_RangeToFormat *pfr);
 382         int TextWidth(int style, const char *text);
 383
 384         virtual void SetVerticalScrollPos() = 0;
 385         virtual void SetHorizontalScrollPos() = 0;
 386         virtual bool ModifyScrollBars(int nMax, int nPage) = 0;
 387         virtual void ReconfigureScrollBars();
 388         void SetScrollBars();
 389         void ChangeSize();
 390
 391         void FilterSelections();
 392         int InsertSpace(int position, unsigned int spaces);
 393         void AddChar(char ch);
 394         virtual void AddCharUTF(const char *s, unsigned int len, bool treatAsDBCS=false);
 395         void ClearBeforeTentativeStart();
 396         void InsertPaste(const char *text, int len);
 397         enum PasteShape { pasteStream=0, pasteRectangular = 1, pasteLine = 2 };
 398         void InsertPasteShape(const char *text, int len, PasteShape shape);
 399         void ClearSelection(bool retainMultipleSelections = false);
 400         void ClearAll();
 401         void ClearDocumentStyle();
 402         void Cut();
 403         void PasteRectangular(SelectionPosition pos, const char *ptr, int len);
 404         virtual void Copy() = 0;
 405         virtual void CopyAllowLine();
 406         virtual bool CanPaste();
 407         virtual void Paste() = 0;
 408         void Clear();
 409         void SelectAll();
 410         void Undo();
 411         void Redo();
 412         void DelCharBack(bool allowLineStartDeletion);
 413         virtual void ClaimSelection() = 0;
 414
 415         static int ModifierFlags(bool shift, bool ctrl, bool alt, bool meta=false);
 416         virtual void NotifyChange() = 0;
 417         virtual void NotifyFocus(bool focus);
 418         virtual void SetCtrlID(int identifier);
 419         virtual int GetCtrlID() { return ctrlID; }
 420         virtual void NotifyParent(SCNotification scn) = 0;
 421         virtual void NotifyStyleToNeeded(int endStyleNeeded);
 422         void NotifyChar(int ch);
 423         void NotifySavePoint(bool isSavePoint);
 424         void NotifyModifyAttempt();
 425         virtual void NotifyDoubleClick(Point pt, int modifiers);
 426         virtual void NotifyDoubleClick(Point pt, bool shift, bool ctrl, bool alt);
 427         void NotifyHotSpotClicked(int position, int modifiers);
 428         void NotifyHotSpotClicked(int position, bool shift, bool ctrl, bool alt);
 429         void NotifyHotSpotDoubleClicked(int position, int modifiers);
 430         void NotifyHotSpotDoubleClicked(int position, bool shift, bool ctrl, bool alt);
 431         void NotifyHotSpotReleaseClick(int position, int modifiers);
 432         void NotifyHotSpotReleaseClick(int position, bool shift, bool ctrl, bool alt);
 433         bool NotifyUpdateUI();
 434         void NotifyPainted();
 435         void NotifyIndicatorClick(bool click, int position, int modifiers);
 436         void NotifyIndicatorClick(bool click, int position, bool shift, bool ctrl, bool alt);
 437         bool NotifyMarginClick(Point pt, int modifiers);
 438         bool NotifyMarginClick(Point pt, bool shift, bool ctrl, bool alt);
 439         void NotifyNeedShown(int pos, int len);
 440         void NotifyDwelling(Point pt, bool state);
 441         void NotifyZoom();
 442
 443         void NotifyModifyAttempt(Document *document, void *userData);
 444         void NotifySavePoint(Document *document, void *userData, bool atSavePoint);
 445         void CheckModificationForWrap(DocModification mh);
 446         void NotifyModified(Document *document, DocModification mh, void *userData);
 447         void NotifyDeleted(Document *document, void *userData);
 448         void NotifyStyleNeeded(Document *doc, void *userData, int endPos);
 449         void NotifyLexerChanged(Document *doc, void *userData);
 450         void NotifyErrorOccurred(Document *doc, void *userData, int status);
 451         void NotifyMacroRecord(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 452
 453         void ContainerNeedsUpdate(int flags);
 454         void PageMove(int direction, Selection::selTypes selt=Selection::noSel, bool stuttered = false);
 455         enum { cmSame, cmUpper, cmLower };
 456         virtual std::string CaseMapString(const std::string &s, int caseMapping);
 457         void ChangeCaseOfSelection(int caseMapping);
 458         void LineTranspose();
 459         void Duplicate(bool forLine);
 460         virtual void CancelModes();
 461         void NewLine();
 462         SelectionPosition PositionUpOrDown(SelectionPosition spStart, int direction, int lastX);
 463         void CursorUpOrDown(int direction, Selection::selTypes selt);
 464         void ParaUpOrDown(int direction, Selection::selTypes selt);
 465         int StartEndDisplayLine(int pos, bool start);
 466         int VCHomeDisplayPosition(int position);
 467         int VCHomeWrapPosition(int position);
 468         int LineEndWrapPosition(int position);
 469         int HorizontalMove(unsigned int iMessage);
 470         int DelWordOrLine(unsigned int iMessage);
 471         virtual int KeyCommand(unsigned int iMessage);
 472         virtual int KeyDefault(int /* key */, int /*modifiers*/);
 473         int KeyDownWithModifiers(int key, int modifiers, bool *consumed);
 474         int KeyDown(int key, bool shift, bool ctrl, bool alt, bool *consumed=0);
 475
 476         void Indent(bool forwards);
 477
 478         virtual CaseFolder *CaseFolderForEncoding();
 479         long FindText(uptr_t wParam, sptr_t lParam);
 480         void SearchAnchor();
 481         long SearchText(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 482         long SearchInTarget(const char *text, int length);
 483         void GoToLine(int lineNo);
 484
 485         virtual void CopyToClipboard(const SelectionText &selectedText) = 0;
 486         std::string RangeText(int start, int end) const;
 487         void CopySelectionRange(SelectionText *ss, bool allowLineCopy=false);
 488         void CopyRangeToClipboard(int start, int end);
 489         void CopyText(int length, const char *text);
 490         void SetDragPosition(SelectionPosition newPos);
 491         virtual void DisplayCursor(Window::Cursor c);
 492         virtual bool DragThreshold(Point ptStart, Point ptNow);
 493         virtual void StartDrag();
 494         void DropAt(SelectionPosition position, const char *value, size_t lengthValue, bool moving, bool rectangular);
 495         void DropAt(SelectionPosition position, const char *value, bool moving, bool rectangular);
 496         /** PositionInSelection returns true if position in selection. */
 497         bool PositionInSelection(int pos);
 498         bool PointInSelection(Point pt);
 499         bool PointInSelMargin(Point pt) const;
 500         Window::Cursor GetMarginCursor(Point pt) const;
 501         void TrimAndSetSelection(int currentPos_, int anchor_);
 502         void LineSelection(int lineCurrentPos_, int lineAnchorPos_, bool wholeLine);
 503         void WordSelection(int pos);
 504         void DwellEnd(bool mouseMoved);
 505         void MouseLeave();
 506         virtual void ButtonDownWithModifiers(Point pt, unsigned int curTime, int modifiers);
 507         virtual void ButtonDown(Point pt, unsigned int curTime, bool shift, bool ctrl, bool alt);
 508         void ButtonMoveWithModifiers(Point pt, int modifiers);
 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);
 515         enum TickReason { tickCaret, tickScroll, tickWiden, tickDwell, tickPlatform };
 516         virtual void TickFor(TickReason reason);
 517         virtual bool FineTickerAvailable();
 518         virtual bool FineTickerRunning(TickReason reason);
 519         virtual void FineTickerStart(TickReason reason, int millis, int tolerance);
 520         virtual void FineTickerCancel(TickReason reason);
 521         virtual bool SetIdle(bool) { return false; }
 522         virtual void SetMouseCapture(bool on) = 0;
 523         virtual bool HaveMouseCapture() = 0;
 524         void SetFocusState(bool focusState);
 525
 526         int PositionAfterArea(PRectangle rcArea) const;
 527         void StyleToPositionInView(Position pos);
 528         virtual void IdleWork();
 529         virtual void QueueIdleWork(WorkNeeded::workItems items, int upTo=0);
 530
 531         virtual bool PaintContains(PRectangle rc);
 532         bool PaintContainsMargin();
 533         void CheckForChangeOutsidePaint(Range r);
 534         void SetBraceHighlight(Position pos0, Position pos1, int matchStyle);
 535
 536         void SetAnnotationHeights(int start, int end);
 537         virtual void SetDocPointer(Document *document);
 538
 539         void SetAnnotationVisible(int visible);
 540
 541         int ExpandLine(int line);
 542         void SetFoldExpanded(int lineDoc, bool expanded);
 543         void FoldLine(int line, int action);
 544         void FoldExpand(int line, int action, int level);
 545         int ContractedFoldNext(int lineStart) const;
 546         void EnsureLineVisible(int lineDoc, bool enforcePolicy);
 547         void FoldChanged(int line, int levelNow, int levelPrev);
 548         void NeedShown(int pos, int len);
 549         void FoldAll(int action);
 550
 551         int GetTag(char *tagValue, int tagNumber);
 552         int ReplaceTarget(bool replacePatterns, const char *text, int length=-1);
 553
 554         bool PositionIsHotspot(int position) const;
 555         bool PointIsHotspot(Point pt);
 556         void SetHotSpotRange(Point *pt);
 557         Range GetHotSpotRange() const;
 558         void SetHoverIndicatorPosition(int position);
 559         void SetHoverIndicatorPoint(Point pt);
 560
 561         int CodePage() const;
 562         virtual bool ValidCodePage(int /* codePage */) const { return true; }
 563         int WrapCount(int line);
 564         void AddStyledText(char *buffer, int appendLength);
 565
 566         virtual sptr_t DefWndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam) = 0;
 567         void StyleSetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 568         sptr_t StyleGetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 569
 570         static const char *StringFromEOLMode(int eolMode);
 571
 572         static sptr_t StringResult(sptr_t lParam, const char *val);
 573         static sptr_t BytesResult(sptr_t lParam, const unsigned char *val, size_t len);
 574
 575 public:
 576         // Public so the COM thunks can access it.
 577         bool IsUnicodeMode() const;
 578         // Public so scintilla_send_message can use it.
 579         virtual sptr_t WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 580         // Public so scintilla_set_id can use it.
 581         int ctrlID;
 582         // Public so COM methods for drag and drop can set it.
 583         int errorStatus;
 584         friend class AutoSurface;
 585         friend class SelectionLineIterator;
 586 };
 587
 588 /**
 589  * A smart pointer class to ensure Surfaces are set up and deleted correctly.
 590  */
 591 class AutoSurface {
 592 private:
 593         Surface *surf;
 594 public:
 595         AutoSurface(Editor *ed, int technology = -1) : surf(0) {
 596                 if (ed->wMain.GetID()) {
 597                         surf = Surface::Allocate(technology != -1 ? technology : ed->technology);
 598                         if (surf) {
 599                                 surf->Init(ed->wMain.GetID());
 600                                 surf->SetUnicodeMode(SC_CP_UTF8 == ed->CodePage());
 601                                 surf->SetDBCSMode(ed->CodePage());
 602                         }
 603                 }
 604         }
 605         AutoSurface(SurfaceID sid, Editor *ed, int technology = -1) : surf(0) {
 606                 if (ed->wMain.GetID()) {
 607                         surf = Surface::Allocate(technology != -1 ? technology : ed->technology);
 608                         if (surf) {
 609                                 surf->Init(sid, ed->wMain.GetID());
 610                                 surf->SetUnicodeMode(SC_CP_UTF8 == ed->CodePage());
 611                                 surf->SetDBCSMode(ed->CodePage());
 612                         }
 613                 }
 614         }
 615         ~AutoSurface() {
 616                 delete surf;
 617         }
 618         Surface *operator->() const {
 619                 return surf;
 620         }
 621         operator Surface *() const {
 622                 return surf;
 623         }
 624 };
 625
 626 #ifdef SCI_NAMESPACE
 627 }
 628 #endif
 629
 630 #endif