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
 137         int printMagnification;
 138         int printColourMode;
 139         int printWrapState;
 140         int cursorMode;
 141         int controlCharSymbol;
 142
 143         // Highlight current folding block
 144         HighlightDelimiter highlightDelimiter;
 145
 146         bool hasFocus;
 147         bool hideSelection;
 148         bool inOverstrike;
 149         bool mouseDownCaptures;
 150
 151         /** In bufferedDraw mode, graphics operations are drawn to a pixmap and then copied to
 152          * the screen. This avoids flashing but is about 30% slower. */
 153         bool bufferedDraw;
 154         /** In twoPhaseDraw mode, drawing is performed in two phases, first the background
 155         * and then the foreground. This avoids chopping off characters that overlap the next run. */
 156         bool twoPhaseDraw;
 157
 158         int xOffset;            ///< Horizontal scrolled amount in pixels
 159         int xCaretMargin;       ///< Ensure this many pixels visible on both sides of caret
 160         bool horizontalScrollBarVisible;
 161         int scrollWidth;
 162         bool trackLineWidth;
 163         int lineWidthMaxSeen;
 164         bool verticalScrollBarVisible;
 165         bool endAtLastLine;
 166         int caretSticky;
 167         int marginOptions;
 168         bool multipleSelection;
 169         bool additionalSelectionTyping;
 170         int multiPasteMode;
 171         bool additionalCaretsBlink;
 172         bool additionalCaretsVisible;
 173
 174         int virtualSpaceOptions;
 175
 176         Surface *pixmapLine;
 177         Surface *pixmapSelMargin;
 178         Surface *pixmapSelPattern;
 179         Surface *pixmapIndentGuide;
 180         Surface *pixmapIndentGuideHighlight;
 181
 182         LineLayoutCache llc;
 183         PositionCache posCache;
 184
 185         KeyMap kmap;
 186
 187         Caret caret;
 188         Timer timer;
 189         Timer autoScrollTimer;
 190         enum { autoScrollDelay = 200 };
 191
 192         Idler idler;
 193
 194         Point lastClick;
 195         unsigned int lastClickTime;
 196         int dwellDelay;
 197         int ticksToDwell;
 198         bool dwelling;
 199         enum { selChar, selWord, selSubLine, selWholeLine } selectionType;
 200         Point ptMouseLast;
 201         enum { ddNone, ddInitial, ddDragging } inDragDrop;
 202         bool dropWentOutside;
 203         SelectionPosition posDrag;
 204         SelectionPosition posDrop;
 205         int hotSpotClickPos;
 206         int lastXChosen;
 207         int lineAnchorPos;
 208         int originalAnchorPos;
 209         int wordSelectAnchorStartPos;
 210         int wordSelectAnchorEndPos;
 211         int wordSelectInitialCaretPos;
 212         int targetStart;
 213         int targetEnd;
 214         int searchFlags;
 215         int topLine;
 216         int posTopLine;
 217         int lengthForEncode;
 218
 219         int needUpdateUI;
 220         Position braces[2];
 221         int bracesMatchStyle;
 222         int highlightGuideColumn;
 223
 224         int theEdge;
 225
 226         enum { notPainting, painting, paintAbandoned } paintState;
 227         PRectangle rcPaint;
 228         bool paintingAllText;
 229         bool willRedrawAll;
 230         StyleNeeded styleNeeded;
 231
 232         int modEventMask;
 233
 234         SelectionText drag;
 235         Selection sel;
 236         bool primarySelection;
 237
 238         int caretXPolicy;
 239         int caretXSlop; ///< Ensure this many pixels visible on both sides of caret
 240
 241         int caretYPolicy;
 242         int caretYSlop; ///< Ensure this many lines visible on both sides of caret
 243
 244         int visiblePolicy;
 245         int visibleSlop;
 246
 247         int searchAnchor;
 248
 249         bool recordingMacro;
 250
 251         int foldFlags;
 252         ContractionState cs;
 253
 254         // Hotspot support
 255         int hsStart;
 256         int hsEnd;
 257
 258         // Wrapping support
 259         enum { eWrapNone, eWrapWord, eWrapChar } wrapState;
 260         enum { wrapLineLarge = 0x7ffffff };
 261         int wrapWidth;
 262         int wrapStart;
 263         int wrapEnd;
 264         int wrapVisualFlags;
 265         int wrapVisualFlagsLocation;
 266         int wrapVisualStartIndent;
 267         XYPOSITION wrapAddIndent; // This will be added to initial indent of line
 268         int wrapIndentMode; // SC_WRAPINDENT_FIXED, _SAME, _INDENT
 269
 270         bool convertPastes;
 271
 272         Document *pdoc;
 273
 274         Editor();
 275         virtual ~Editor();
 276         virtual void Initialise() = 0;
 277         virtual void Finalise();
 278
 279         void InvalidateStyleData();
 280         void InvalidateStyleRedraw();
 281         void RefreshStyleData();
 282         void DropGraphics(bool freeObjects);
 283         void AllocateGraphics();
 284
 285         virtual PRectangle GetClientRectangle();
 286         PRectangle GetTextRectangle();
 287
 288         int LinesOnScreen();
 289         int LinesToScroll();
 290         int MaxScrollPos();
 291         SelectionPosition ClampPositionIntoDocument(SelectionPosition sp) const;
 292         Point LocationFromPosition(SelectionPosition pos);
 293         Point LocationFromPosition(int pos);
 294         int XFromPosition(int pos);
 295         int XFromPosition(SelectionPosition sp);
 296         SelectionPosition SPositionFromLocation(Point pt, bool canReturnInvalid=false, bool charPosition=false, bool virtualSpace=true);
 297         int PositionFromLocation(Point pt, bool canReturnInvalid=false, bool charPosition=false);
 298         SelectionPosition SPositionFromLineX(int lineDoc, int x);
 299         int PositionFromLineX(int line, int x);
 300         int LineFromLocation(Point pt);
 301         void SetTopLine(int topLineNew);
 302
 303         bool AbandonPaint();
 304         void RedrawRect(PRectangle rc);
 305         void Redraw();
 306         void RedrawSelMargin(int line=-1, bool allAfter=false);
 307         PRectangle RectangleFromRange(int start, int end);
 308         void InvalidateRange(int start, int end);
 309
 310         bool UserVirtualSpace() const {
 311                 return ((virtualSpaceOptions & SCVS_USERACCESSIBLE) != 0);
 312         }
 313         int CurrentPosition();
 314         bool SelectionEmpty();
 315         SelectionPosition SelectionStart();
 316         SelectionPosition SelectionEnd();
 317         void SetRectangularRange();
 318         void ThinRectangularRange();
 319         void InvalidateSelection(SelectionRange newMain, bool invalidateWholeSelection=false);
 320         void SetSelection(SelectionPosition currentPos_, SelectionPosition anchor_);
 321         void SetSelection(int currentPos_, int anchor_);
 322         void SetSelection(SelectionPosition currentPos_);
 323         void SetSelection(int currentPos_);
 324         void SetEmptySelection(SelectionPosition currentPos_);
 325         void SetEmptySelection(int currentPos_);
 326         bool RangeContainsProtected(int start, int end) const;
 327         bool SelectionContainsProtected();
 328         int MovePositionOutsideChar(int pos, int moveDir, bool checkLineEnd=true) const;
 329         SelectionPosition MovePositionOutsideChar(SelectionPosition pos, int moveDir, bool checkLineEnd=true) const;
 330         int MovePositionTo(SelectionPosition newPos, Selection::selTypes sel=Selection::noSel, bool ensureVisible=true);
 331         int MovePositionTo(int newPos, Selection::selTypes sel=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         };
 352         XYScrollPosition XYScrollToMakeVisible(const bool useMargin, const bool vert, const bool horiz);
 353         void SetXYScroll(XYScrollPosition newXY);
 354         void EnsureCaretVisible(bool useMargin=true, bool vert=true, bool horiz=true);
 355         void ShowCaretAtCurrentPosition();
 356         void DropCaret();
 357         void InvalidateCaret();
 358         virtual void UpdateSystemCaret();
 359
 360         void NeedWrapping(int docLineStart = 0, int docLineEnd = wrapLineLarge);
 361         bool WrapOneLine(Surface *surface, int lineToWrap);
 362         bool WrapLines(bool fullWrap, int priorityWrapLineStart);
 363         void LinesJoin();
 364         void LinesSplit(int pixelWidth);
 365
 366         int SubstituteMarkerIfEmpty(int markerCheck, int markerDefault);
 367         void PaintSelMargin(Surface *surface, PRectangle &rc);
 368         LineLayout *RetrieveLineLayout(int lineNumber);
 369         void LayoutLine(int line, Surface *surface, ViewStyle &vstyle, LineLayout *ll,
 370                 int width=LineLayout::wrapWidthInfinite);
 371         ColourDesired SelectionBackground(ViewStyle &vsDraw, bool main);
 372         ColourDesired TextBackground(ViewStyle &vsDraw, bool overrideBackground, ColourDesired background, int inSelection, bool inHotspot, int styleMain, int i, LineLayout *ll);
 373         void DrawIndentGuide(Surface *surface, int lineVisible, int lineHeight, int start, PRectangle rcSegment, bool highlight);
 374         void DrawWrapMarker(Surface *surface, PRectangle rcPlace, bool isEndMarker, ColourDesired wrapColour);
 375         void DrawEOL(Surface *surface, ViewStyle &vsDraw, PRectangle rcLine, LineLayout *ll,
 376                 int line, int lineEnd, int xStart, int subLine, XYACCUMULATOR subLineStart,
 377                 bool overrideBackground, ColourDesired background,
 378                 bool drawWrapMark, ColourDesired wrapColour);
 379         void DrawIndicator(int indicNum, int startPos, int endPos, Surface *surface, ViewStyle &vsDraw,
 380                 int xStart, PRectangle rcLine, LineLayout *ll, int subLine);
 381         void DrawIndicators(Surface *surface, ViewStyle &vsDraw, int line, int xStart,
 382                 PRectangle rcLine, LineLayout *ll, int subLine, int lineEnd, bool under);
 383         void DrawAnnotation(Surface *surface, ViewStyle &vsDraw, int line, int xStart,
 384         PRectangle rcLine, LineLayout *ll, int subLine);
 385         void DrawLine(Surface *surface, ViewStyle &vsDraw, int line, int lineVisible, int xStart,
 386                 PRectangle rcLine, LineLayout *ll, int subLine);
 387         void DrawBlockCaret(Surface *surface, ViewStyle &vsDraw, LineLayout *ll, int subLine,
 388                 int xStart, int offset, int posCaret, PRectangle rcCaret, ColourDesired caretColour);
 389         void DrawCarets(Surface *surface, ViewStyle &vsDraw, int line, int xStart,
 390                 PRectangle rcLine, LineLayout *ll, int subLine);
 391         void RefreshPixMaps(Surface *surfaceWindow);
 392         void Paint(Surface *surfaceWindow, PRectangle rcArea);
 393         long FormatRange(bool draw, Sci_RangeToFormat *pfr);
 394         int TextWidth(int style, const char *text);
 395
 396         virtual void SetVerticalScrollPos() = 0;
 397         virtual void SetHorizontalScrollPos() = 0;
 398         virtual bool ModifyScrollBars(int nMax, int nPage) = 0;
 399         virtual void ReconfigureScrollBars();
 400         void SetScrollBars();
 401         void ChangeSize();
 402
 403         void FilterSelections();
 404         int InsertSpace(int position, unsigned int spaces);
 405         void AddChar(char ch);
 406         virtual void AddCharUTF(char *s, unsigned int len, bool treatAsDBCS=false);
 407         void InsertPaste(SelectionPosition selStart, const char *text, int len);
 408         void ClearSelection(bool retainMultipleSelections=false);
 409         void ClearAll();
 410         void ClearDocumentStyle();
 411         void Cut();
 412         void PasteRectangular(SelectionPosition pos, const char *ptr, int len);
 413         virtual void Copy() = 0;
 414         virtual void CopyAllowLine();
 415         virtual bool CanPaste();
 416         virtual void Paste() = 0;
 417         void Clear();
 418         void SelectAll();
 419         void Undo();
 420         void Redo();
 421         void DelChar();
 422         void DelCharBack(bool allowLineStartDeletion);
 423         virtual void ClaimSelection() = 0;
 424
 425         virtual void NotifyChange() = 0;
 426         virtual void NotifyFocus(bool focus);
 427         virtual void SetCtrlID(int identifier);
 428         virtual int GetCtrlID() { return ctrlID; }
 429         virtual void NotifyParent(SCNotification scn) = 0;
 430         virtual void NotifyParent(SCNotification * scn) = 0;
 431         virtual void NotifyStyleToNeeded(int endStyleNeeded);
 432         void NotifyChar(int ch);
 433         void NotifySavePoint(bool isSavePoint);
 434         void NotifyModifyAttempt();
 435         virtual void NotifyDoubleClick(Point pt, bool shift, bool ctrl, bool alt);
 436         void NotifyHotSpotClicked(int position, bool shift, bool ctrl, bool alt);
 437         void NotifyHotSpotDoubleClicked(int position, bool shift, bool ctrl, bool alt);
 438         void NotifyHotSpotReleaseClick(int position, bool shift, bool ctrl, bool alt);
 439         void NotifyUpdateUI();
 440         void NotifyPainted();
 441         void NotifyIndicatorClick(bool click, int position, bool shift, bool ctrl, bool alt);
 442         bool NotifyMarginClick(Point pt, bool shift, bool ctrl, bool alt);
 443         void NotifyNeedShown(int pos, int len);
 444         void NotifyDwelling(Point pt, bool state);
 445         void NotifyZoom();
 446
 447         void NotifyModifyAttempt(Document *document, void *userData);
 448         void NotifySavePoint(Document *document, void *userData, bool atSavePoint);
 449         void CheckModificationForWrap(DocModification mh);
 450         void NotifyModified(Document *document, DocModification mh, void *userData);
 451         void NotifyDeleted(Document *document, void *userData);
 452         void NotifyStyleNeeded(Document *doc, void *userData, int endPos);
 453         void NotifyLexerChanged(Document *doc, void *userData);
 454         void NotifyErrorOccurred(Document *doc, void *userData, int status);
 455         void NotifyMacroRecord(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 456
 457         void ContainerNeedsUpdate(int flags);
 458         void PageMove(int direction, Selection::selTypes sel=Selection::noSel, bool stuttered = false);
 459         enum { cmSame, cmUpper, cmLower } caseMap;
 460         virtual std::string CaseMapString(const std::string &s, int caseMapping);
 461         void ChangeCaseOfSelection(int caseMapping);
 462         void LineTranspose();
 463         void Duplicate(bool forLine);
 464         virtual void CancelModes();
 465         void NewLine();
 466         void CursorUpOrDown(int direction, Selection::selTypes sel=Selection::noSel);
 467         void ParaUpOrDown(int direction, Selection::selTypes sel=Selection::noSel);
 468         int StartEndDisplayLine(int pos, bool start);
 469         virtual int KeyCommand(unsigned int iMessage);
 470         virtual int KeyDefault(int /* key */, int /*modifiers*/);
 471         int KeyDownWithModifiers(int key, int modifiers, bool *consumed);
 472         int KeyDown(int key, bool shift, bool ctrl, bool alt, bool *consumed=0);
 473
 474         int GetWhitespaceVisible();
 475         void SetWhitespaceVisible(int view);
 476
 477         void Indent(bool forwards);
 478
 479         virtual CaseFolder *CaseFolderForEncoding();
 480         long FindText(uptr_t wParam, sptr_t lParam);
 481         void SearchAnchor();
 482         long SearchText(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 483         long SearchInTarget(const char *text, int length);
 484         void GoToLine(int lineNo);
 485
 486         virtual void CopyToClipboard(const SelectionText &selectedText) = 0;
 487         char *CopyRange(int start, int end);
 488         void CopySelectionRange(SelectionText *ss, bool allowLineCopy=false);
 489         void CopyRangeToClipboard(int start, int end);
 490         void CopyText(int length, const char *text);
 491         void SetDragPosition(SelectionPosition newPos);
 492         virtual void DisplayCursor(Window::Cursor c);
 493         virtual bool DragThreshold(Point ptStart, Point ptNow);
 494         virtual void StartDrag();
 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);
 500         Window::Cursor GetMarginCursor(Point pt);
 501         void LineSelection(int lineCurrentPos_, int lineAnchorPos_, bool wholeLine);
 502         void WordSelection(int pos);
 503         void DwellEnd(bool mouseMoved);
 504         void MouseLeave();
 505         virtual void ButtonDown(Point pt, unsigned int curTime, bool shift, bool ctrl, bool alt);
 506         void ButtonMove(Point pt);
 507         void ButtonUp(Point pt, unsigned int curTime, bool ctrl);
 508
 509         void Tick();
 510         bool Idle();
 511         virtual void SetTicking(bool on) = 0;
 512         virtual bool SetIdle(bool) { return false; }
 513         virtual void SetMouseCapture(bool on) = 0;
 514         virtual bool HaveMouseCapture() = 0;
 515         void SetFocusState(bool focusState);
 516
 517         int PositionAfterArea(PRectangle rcArea);
 518         void StyleToPositionInView(Position pos);
 519         void IdleStyling();
 520         virtual void QueueStyling(int upTo);
 521
 522         virtual bool PaintContains(PRectangle rc);
 523         bool PaintContainsMargin();
 524         void CheckForChangeOutsidePaint(Range r);
 525         void SetBraceHighlight(Position pos0, Position pos1, int matchStyle);
 526
 527         void SetAnnotationHeights(int start, int end);
 528         void SetDocPointer(Document *document);
 529
 530         void SetAnnotationVisible(int visible);
 531
 532         void Expand(int &line, bool doExpand);
 533         void ToggleContraction(int line);
 534         int ContractedFoldNext(int lineStart);
 535         void EnsureLineVisible(int lineDoc, bool enforcePolicy);
 536         int GetTag(char *tagValue, int tagNumber);
 537         int ReplaceTarget(bool replacePatterns, const char *text, int length=-1);
 538
 539         bool PositionIsHotspot(int position);
 540         bool PointIsHotspot(Point pt);
 541         void SetHotSpotRange(Point *pt);
 542         void GetHotSpotRange(int &hsStart, int &hsEnd);
 543
 544         int CodePage() const;
 545         virtual bool ValidCodePage(int /* codePage */) const { return true; }
 546         int WrapCount(int line);
 547         void AddStyledText(char *buffer, int appendLength);
 548
 549         virtual sptr_t DefWndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam) = 0;
 550         void StyleSetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 551         sptr_t StyleGetMessage(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 552
 553         static const char *StringFromEOLMode(int eolMode);
 554
 555         static sptr_t StringResult(sptr_t lParam, const char *val);
 556
 557 public:
 558         // Public so the COM thunks can access it.
 559         bool IsUnicodeMode() const;
 560         // Public so scintilla_send_message can use it.
 561         virtual sptr_t WndProc(unsigned int iMessage, uptr_t wParam, sptr_t lParam);
 562         // Public so scintilla_set_id can use it.
 563         int ctrlID;
 564         // Public so COM methods for drag and drop can set it.
 565         int errorStatus;
 566         friend class AutoSurface;
 567         friend class SelectionLineIterator;
 568 };
 569
 570 /**
 571  * A smart pointer class to ensure Surfaces are set up and deleted correctly.
 572  */
 573 class AutoSurface {
 574 private:
 575         Surface *surf;
 576 public:
 577         AutoSurface(Editor *ed) : surf(0) {
 578                 if (ed->wMain.GetID()) {
 579                         surf = Surface::Allocate(ed->technology);
 580                         if (surf) {
 581                                 surf->Init(ed->wMain.GetID());
 582                                 surf->SetUnicodeMode(SC_CP_UTF8 == ed->CodePage());
 583                                 surf->SetDBCSMode(ed->CodePage());
 584                         }
 585                 }
 586         }
 587         AutoSurface(SurfaceID sid, Editor *ed) : surf(0) {
 588                 if (ed->wMain.GetID()) {
 589                         surf = Surface::Allocate(ed->technology);
 590                         if (surf) {
 591                                 surf->Init(sid, ed->wMain.GetID());
 592                                 surf->SetUnicodeMode(SC_CP_UTF8 == ed->CodePage());
 593                                 surf->SetDBCSMode(ed->CodePage());
 594                         }
 595                 }
 596         }
 597         ~AutoSurface() {
 598                 delete surf;
 599         }
 600         Surface *operator->() const {
 601                 return surf;
 602         }
 603         operator Surface *() const {
 604                 return surf;
 605         }
 606 };
 607
 608 #ifdef SCI_NAMESPACE
 609 }
 610 #endif
 611
 612 #endif