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haiku/headers/os/interface/TextView.h
Stefano Ceccherini e333843348 Added Alloc/Copy/FreeRunArray() as Axel's suggestion, and used it internally in TextView. Also fixed small memory leak 
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16224 a95241bf-73f2-0310-859d-f6bbb57e9c96
2006-02-03 21:22:00 +00:00

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/*******************************************************************************
/
/ File: TextView.h
/
/ Description: BTextView displays and manages styled text.
/
/ Copyright 1993-98, Be Incorporated, All Rights Reserved
/
*******************************************************************************/
#ifndef _TEXTVIEW_H
#define _TEXTVIEW_H
#include <BeBuild.h>
#include <View.h>
/*----------------------------------------------------------------*/
/*----- BTextView structures and definitions ---------------------*/
struct text_run {
int32 offset; /* byte offset of first character of run*/
BFont font; /* font of run*/
rgb_color color; /* color of run*/
};
struct text_run_array {
int32 count; /* number of text runs*/
text_run runs[1]; /* array of count number of runs*/
};
enum undo_state {
B_UNDO_UNAVAILABLE,
B_UNDO_TYPING,
B_UNDO_CUT,
B_UNDO_PASTE,
B_UNDO_CLEAR,
B_UNDO_DROP
};
#if _PR2_COMPATIBLE_
extern "C" void _ReservedTextView2__9BTextViewFv(BTextView *object,
BMessage *drag,
BBitmap **bitmap,
BPoint *point,
BHandler **handler);
#endif
class BBitmap;
class BClipboard;
class BFile;
class BList;
class _BTextGapBuffer_;
class _BLineBuffer_;
class _BStyleBuffer_;
class _BWidthBuffer_;
class _BUndoBuffer_;
class _BInlineInput_;
class _BTextTrackState_;
class _BTextChangeResult_;
extern "C" status_t _init_interface_kit_();
/*----------------------------------------------------------------*/
/*----- BTextView class ------------------------------------------*/
class BTextView : public BView {
public:
BTextView(BRect frame,
const char *name,
BRect textRect,
uint32 resizeMask,
uint32 flags = B_WILL_DRAW | B_PULSE_NEEDED);
BTextView(BRect frame,
const char *name,
BRect textRect,
const BFont *initialFont,
const rgb_color *initialColor,
uint32 resizeMask,
uint32 flags);
BTextView(BMessage *data);
virtual ~BTextView();
static BArchivable* Instantiate(BMessage *data);
virtual status_t Archive(BMessage *data, bool deep = true) const;
virtual void AttachedToWindow();
virtual void DetachedFromWindow();
virtual void Draw(BRect inRect);
virtual void MouseDown(BPoint where);
virtual void MouseUp(BPoint where);
virtual void MouseMoved(BPoint where,
uint32 code,
const BMessage *message);
virtual void WindowActivated(bool state);
virtual void KeyDown(const char *bytes, int32 numBytes);
virtual void Pulse();
virtual void FrameResized(float width, float height);
virtual void MakeFocus(bool focusState = true);
virtual void MessageReceived(BMessage *message);
virtual BHandler* ResolveSpecifier(BMessage *message,
int32 index,
BMessage *specifier,
int32 form,
const char *property);
virtual status_t GetSupportedSuites(BMessage *data);
virtual status_t Perform(perform_code d, void *arg);
void SetText(const char *inText,
const text_run_array *inRuns = NULL);
void SetText(const char *inText,
int32 inLength,
const text_run_array *inRuns = NULL);
void SetText(BFile *inFile,
int32 startOffset,
int32 inLength,
const text_run_array *inRuns = NULL);
void Insert(const char *inText,
const text_run_array *inRuns = NULL);
void Insert(const char *inText,
int32 inLength,
const text_run_array *inRuns = NULL);
void Insert(int32 startOffset,
const char *inText,
int32 inLength,
const text_run_array *inRuns = NULL);
void Delete();
void Delete(int32 startOffset, int32 endOffset);
const char* Text() const;
int32 TextLength() const;
void GetText(int32 offset,
int32 length,
char *buffer) const;
uchar ByteAt(int32 offset) const;
int32 CountLines() const;
int32 CurrentLine() const;
void GoToLine(int32 lineNum);
virtual void Cut(BClipboard *clipboard);
virtual void Copy(BClipboard *clipboard);
virtual void Paste(BClipboard *clipboard);
void Clear();
virtual bool AcceptsPaste(BClipboard *clipboard);
virtual bool AcceptsDrop(const BMessage *inMessage);
virtual void Select(int32 startOffset, int32 endOffset);
void SelectAll();
void GetSelection(int32 *outStart, int32 *outEnd) const;
void SetFontAndColor(const BFont *inFont,
uint32 inMode = B_FONT_ALL,
const rgb_color *inColor = NULL);
void SetFontAndColor(int32 startOffset,
int32 endOffset,
const BFont *inFont,
uint32 inMode = B_FONT_ALL,
const rgb_color *inColor = NULL);
void GetFontAndColor(int32 inOffset,
BFont *outFont,
rgb_color *outColor = NULL) const;
void GetFontAndColor(BFont *outFont,
uint32 *outMode,
rgb_color *outColor = NULL,
bool *outEqColor = NULL) const;
void SetRunArray(int32 startOffset,
int32 endOffset,
const text_run_array *inRuns);
text_run_array* RunArray(int32 startOffset,
int32 endOffset,
int32 *outSize = NULL) const;
int32 LineAt(int32 offset) const;
int32 LineAt(BPoint point) const;
BPoint PointAt(int32 inOffset, float *outHeight = NULL) const;
int32 OffsetAt(BPoint point) const;
int32 OffsetAt(int32 line) const;
virtual void FindWord(int32 inOffset,
int32 *outFromOffset,
int32 *outToOffset);
virtual bool CanEndLine(int32 offset);
float LineWidth(int32 lineNum = 0) const;
float LineHeight(int32 lineNum = 0) const;
float TextHeight(int32 startLine, int32 endLine) const;
void GetTextRegion(int32 startOffset,
int32 endOffset,
BRegion *outRegion) const;
virtual void ScrollToOffset(int32 inOffset);
void ScrollToSelection();
void Highlight(int32 startOffset, int32 endOffset);
void SetTextRect(BRect rect);
BRect TextRect() const;
void SetStylable(bool stylable);
bool IsStylable() const;
void SetTabWidth(float width);
float TabWidth() const;
void MakeSelectable(bool selectable = true);
bool IsSelectable() const;
void MakeEditable(bool editable = true);
bool IsEditable() const;
void SetWordWrap(bool wrap);
bool DoesWordWrap() const;
void SetMaxBytes(int32 max);
int32 MaxBytes() const;
void DisallowChar(uint32 aChar);
void AllowChar(uint32 aChar);
void SetAlignment(alignment flag);
alignment Alignment() const;
void SetAutoindent(bool state);
bool DoesAutoindent() const;
void SetColorSpace(color_space colors);
color_space ColorSpace() const;
void MakeResizable(bool resize, BView *resizeView = NULL);
bool IsResizable() const;
void SetDoesUndo(bool undo);
bool DoesUndo() const;
void HideTyping(bool enabled);
bool IsTypingHidden(void) const;
virtual void ResizeToPreferred();
virtual void GetPreferredSize(float *width, float *height);
virtual void AllAttached();
virtual void AllDetached();
static text_run_array* AllocRunArray(int32 entryCount, int32 *outSize = NULL);
static text_run_array* CopyRunArray(const text_run_array *orig, int32 countDelta = 0);
static void FreeRunArray(text_run_array *array);
static void * FlattenRunArray(const text_run_array *inArray, int32 *outSize = NULL);
static text_run_array* UnflattenRunArray(const void *data, int32 *outSize = NULL);
protected:
virtual void InsertText(const char *inText,
int32 inLength,
int32 inOffset,
const text_run_array *inRuns);
virtual void DeleteText(int32 fromOffset, int32 toOffset);
public:
virtual void Undo(BClipboard *clipboard);
undo_state UndoState(bool *isRedo) const;
protected:
virtual void GetDragParameters(BMessage *drag,
BBitmap **bitmap,
BPoint *point,
BHandler **handler);
/*----- Private or reserved -----------------------------------------*/
private:
friend status_t _init_interface_kit_();
friend class _BTextTrackState_;
#if _PR2_COMPATIBLE_
friend void _ReservedTextView2__9BTextViewFv(BTextView *object,
BMessage *drag,
BBitmap **bitmap,
BPoint *point,
BHandler **handler);
#endif
virtual void _ReservedTextView3();
virtual void _ReservedTextView4();
virtual void _ReservedTextView5();
virtual void _ReservedTextView6();
virtual void _ReservedTextView7();
virtual void _ReservedTextView8();
#if !_PR3_COMPATIBLE_
virtual void _ReservedTextView9();
virtual void _ReservedTextView10();
virtual void _ReservedTextView11();
virtual void _ReservedTextView12();
#endif
void InitObject(BRect textRect,
const BFont *initialFont,
const rgb_color *initialColor);
void HandleBackspace();
void HandleArrowKey(uint32 inArrowKey);
void HandleDelete();
void HandlePageKey(uint32 inPageKey);
void HandleAlphaKey(const char *bytes, int32 numBytes);
void Refresh(int32 fromOffset,
int32 toOffset,
bool erase,
bool scroll);
void RecalculateLineBreaks(int32 *startLine, int32 *endLine);
int32 FindLineBreak(int32 fromOffset,
float *outAscent,
float *outDescent,
float *ioWidth);
float StyledWidth(int32 fromOffset,
int32 length,
float *outAscent = NULL,
float *outDescent = NULL) const;
float ActualTabWidth(float location) const;
void DoInsertText(const char *inText,
int32 inLength,
int32 inOffset,
const text_run_array *inRuns,
_BTextChangeResult_ *outResult);
void DoDeleteText(int32 fromOffset,
int32 toOffset,
_BTextChangeResult_ *outResult);
void DrawLines(int32 startLine,
int32 endLine,
int32 startOffset = -1,
bool erase = false);
void DrawCaret(int32 offset);
void InvertCaret();
void DragCaret(int32 offset);
void StopMouseTracking();
bool PerformMouseUp(BPoint where);
bool PerformMouseMoved(BPoint where,
uint32 code);
void TrackMouse(BPoint where, const BMessage *message,
bool force = false);
void TrackDrag(BPoint where);
void InitiateDrag();
bool MessageDropped(BMessage *inMessage,
BPoint where,
BPoint offset);
void UpdateScrollbars();
void AutoResize(bool doredraw=true);
void NewOffscreen(float padding = 0.0F);
void DeleteOffscreen();
void Activate();
void Deactivate();
void NormalizeFont(BFont *font);
uint32 CharClassification(int32 offset) const;
int32 NextInitialByte(int32 offset) const;
int32 PreviousInitialByte(int32 offset) const;
bool GetProperty(BMessage *specifier,
int32 form,
const char *property,
BMessage *reply);
bool SetProperty(BMessage *specifier,
int32 form,
const char *property,
BMessage *reply);
bool CountProperties(BMessage *specifier,
int32 form,
const char *property,
BMessage *reply);
void HandleInputMethodChanged(BMessage *message);
void HandleInputMethodLocationRequest();
void CancelInputMethod();
static void LockWidthBuffer();
static void UnlockWidthBuffer();
_BTextGapBuffer_* fText;
_BLineBuffer_* fLines;
_BStyleBuffer_* fStyles;
BRect fTextRect;
int32 fSelStart;
int32 fSelEnd;
bool fCaretVisible;
bigtime_t fCaretTime;
int32 fClickOffset;
int32 fClickCount;
bigtime_t fClickTime;
int32 fDragOffset;
uint8 fCursor;
bool fActive;
bool fStylable;
float fTabWidth;
bool fSelectable;
bool fEditable;
bool fWrap;
int32 fMaxBytes;
BList* fDisallowedChars;
alignment fAlignment;
bool fAutoindent;
BBitmap* fOffscreen;
color_space fColorSpace;
bool fResizable;
BView* fContainerView;
_BUndoBuffer_* fUndo; /* was _reserved[0] */
_BInlineInput_* fInline; /* was _reserved[1] */
BMessageRunner * fDragRunner; /* was _reserved[2] */
BMessageRunner * fClickRunner; /* was _reserved[3] */
BPoint fWhere;
_BTextTrackState_* fTrackingMouse; /* was _reserved[6] */
_BTextChangeResult_* fTextChange; /* was _reserved[7] */
uint32 _reserved[1]; /* was 8 */
#if !_PR3_COMPATIBLE_
uint32 _more_reserved[8];
#endif
static _BWidthBuffer_* sWidths;
static sem_id sWidthSem;
static int32 sWidthAtom;
};
/*-------------------------------------------------------------*/
/*-------------------------------------------------------------*/
#endif /* _TEXT_VIEW_H */
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