include/wx/html/htmlcell.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlcell.h
   3 // Purpose:     wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser
   4 //              as a basic visual element of HTML page
   5 // Author:      Vaclav Slavik
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 1999-2003 Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifndef _WX_HTMLCELL_H_
  13 #define _WX_HTMLCELL_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16 #pragma interface "htmlcell.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_HTML
  22
  23 #include "wx/html/htmltag.h"
  24 #include "wx/html/htmldefs.h"
  25 #include "wx/window.h"
  26
  27
  28 class WXDLLIMPEXP_HTML wxHtmlLinkInfo;
  29 class WXDLLIMPEXP_HTML wxHtmlCell;
  30 class WXDLLIMPEXP_HTML wxHtmlContainerCell;
  31
  32
  33 // wxHtmlSelection is data holder with information about text selection.
  34 // Selection is defined by two positions (beginning and end of the selection)
  35 // and two leaf(!) cells at these positions.
  36 class WXDLLIMPEXP_HTML wxHtmlSelection
  37 {
  38 public:
  39     wxHtmlSelection()
  40         : m_fromPos(wxDefaultPosition), m_toPos(wxDefaultPosition),
  41           m_fromPrivPos(wxDefaultPosition), m_toPrivPos(wxDefaultPosition),
  42           m_fromCell(NULL), m_toCell(NULL) {}
  43
  44     void Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
  45              const wxPoint& toPos, const wxHtmlCell *toCell);
  46     void Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell);
  47
  48     const wxHtmlCell *GetFromCell() const { return m_fromCell; }
  49     const wxHtmlCell *GetToCell() const { return m_toCell; }
  50
  51     // these values are in absolute coordinates:
  52     const wxPoint& GetFromPos() const { return m_fromPos; }
  53     const wxPoint& GetToPos() const { return m_toPos; }
  54
  55     // these are From/ToCell's private data
  56     const wxPoint& GetFromPrivPos() const { return m_fromPrivPos; }
  57     const wxPoint& GetToPrivPos() const { return m_toPrivPos; }
  58     void SetFromPrivPos(const wxPoint& pos) { m_fromPrivPos = pos; }
  59     void SetToPrivPos(const wxPoint& pos) { m_toPrivPos = pos; }
  60     void ClearPrivPos() { m_toPrivPos = m_fromPrivPos = wxDefaultPosition; }
  61
  62     bool IsEmpty() const
  63         { return m_fromPos == wxDefaultPosition &&
  64                  m_toPos == wxDefaultPosition; }
  65
  66 private:
  67     wxPoint m_fromPos, m_toPos;
  68     wxPoint m_fromPrivPos, m_toPrivPos;
  69     const wxHtmlCell *m_fromCell, *m_toCell;
  70 };
  71
  72
  73
  74 enum wxHtmlSelectionState
  75 {
  76     wxHTML_SEL_OUT,     // currently rendered cell is outside the selection
  77     wxHTML_SEL_IN,      // ... is inside selection
  78     wxHTML_SEL_CHANGING // ... is the cell on which selection state changes
  79 };
  80
  81 // Selection state is passed to wxHtmlCell::Draw so that it can render itself
  82 // differently e.g. when inside text selection or outside it.
  83 class WXDLLIMPEXP_HTML wxHtmlRenderingState
  84 {
  85 public:
  86     wxHtmlRenderingState() : m_selState(wxHTML_SEL_OUT) {}
  87
  88     void SetSelectionState(wxHtmlSelectionState s) { m_selState = s; }
  89     wxHtmlSelectionState GetSelectionState() const { return m_selState; }
  90
  91     void SetFgColour(const wxColour& c) { m_fgColour = c; }
  92     const wxColour& GetFgColour() const { return m_fgColour; }
  93     void SetBgColour(const wxColour& c) { m_bgColour = c; }
  94     const wxColour& GetBgColour() const { return m_bgColour; }
  95
  96 private:
  97     wxHtmlSelectionState  m_selState;
  98     wxColour              m_fgColour, m_bgColour;
  99 };
 100
 101
 102 // HTML rendering customization. This class is used when rendering wxHtmlCells
 103 // as a callback:
 104 class WXDLLIMPEXP_HTML wxHtmlRenderingStyle
 105 {
 106 public:
 107     virtual wxColour GetSelectedTextColour(const wxColour& clr) = 0;
 108     virtual wxColour GetSelectedTextBgColour(const wxColour& clr) = 0;
 109 };
 110
 111 // Standard style:
 112 class WXDLLIMPEXP_HTML wxDefaultHtmlRenderingStyle : public wxHtmlRenderingStyle
 113 {
 114 public:
 115     virtual wxColour GetSelectedTextColour(const wxColour& clr);
 116     virtual wxColour GetSelectedTextBgColour(const wxColour& clr);
 117 };
 118
 119
 120 // Information given to cells when drawing them. Contains rendering state,
 121 // selection information and rendering style object that can be used to
 122 // customize the output.
 123 class WXDLLIMPEXP_HTML wxHtmlRenderingInfo
 124 {
 125 public:
 126     wxHtmlRenderingInfo() : m_selection(NULL), m_style(NULL) {}
 127
 128     void SetSelection(wxHtmlSelection *s) { m_selection = s; }
 129     wxHtmlSelection *GetSelection() const { return m_selection; }
 130
 131     void SetStyle(wxHtmlRenderingStyle *style) { m_style = style; }
 132     wxHtmlRenderingStyle& GetStyle() { return *m_style; }
 133
 134     wxHtmlRenderingState& GetState() { return m_state; }
 135
 136 protected:
 137     wxHtmlSelection      *m_selection;
 138     wxHtmlRenderingStyle *m_style;
 139     wxHtmlRenderingState m_state;
 140 };
 141
 142
 143 // Flags for wxHtmlCell::FindCellByPos
 144 enum
 145 {
 146     wxHTML_FIND_EXACT             = 1,
 147     wxHTML_FIND_NEAREST_BEFORE    = 2,
 148     wxHTML_FIND_NEAREST_AFTER     = 4
 149 };
 150
 151
 152
 153
 154 // ---------------------------------------------------------------------------
 155 // wxHtmlCell
 156 //                  Internal data structure. It represents fragments of parsed
 157 //                  HTML page - a word, picture, table, horizontal line and so
 158 //                  on.  It is used by wxHtmlWindow to represent HTML page in
 159 //                  memory.
 160 // ---------------------------------------------------------------------------
 161
 162
 163 class WXDLLIMPEXP_HTML wxHtmlCell : public wxObject
 164 {
 165 public:
 166     wxHtmlCell();
 167     virtual ~wxHtmlCell();
 168
 169     void SetParent(wxHtmlContainerCell *p) {m_Parent = p;}
 170     wxHtmlContainerCell *GetParent() const {return m_Parent;}
 171
 172     int GetPosX() const {return m_PosX;}
 173     int GetPosY() const {return m_PosY;}
 174     int GetWidth() const {return m_Width;}
 175
 176     // Returns the maximum possible length of the cell.
 177     // Call Layout at least once before using GetMaxTotalWidth()
 178     virtual int GetMaxTotalWidth() const { return m_Width; }
 179
 180     int GetHeight() const {return m_Height;}
 181     int GetDescent() const {return m_Descent;}
 182
 183     // Formatting cells are not visible on the screen, they only alter
 184     // renderer's state.
 185     bool IsFormattingCell() const { return m_Width == 0 && m_Height == 0; }
 186
 187     const wxString& GetId() const { return m_id; }
 188     void SetId(const wxString& id) { m_id = id; }
 189
 190     // returns the link associated with this cell. The position is position
 191     // within the cell so it varies from 0 to m_Width, from 0 to m_Height
 192     virtual wxHtmlLinkInfo* GetLink(int WXUNUSED(x) = 0,
 193                                     int WXUNUSED(y) = 0) const
 194         { return m_Link; }
 195
 196     // Returns cursor to be used when mouse is over the cell:
 197     virtual wxCursor GetCursor() const;
 198
 199     // return next cell among parent's cells
 200     wxHtmlCell *GetNext() const {return m_Next;}
 201     // returns first child cell (if there are any, i.e. if this is container):
 202     virtual wxHtmlCell* GetFirstChild() const { return NULL; }
 203
 204     // members writing methods
 205     virtual void SetPos(int x, int y) {m_PosX = x, m_PosY = y;}
 206     void SetLink(const wxHtmlLinkInfo& link);
 207     void SetNext(wxHtmlCell *cell) {m_Next = cell;}
 208
 209     // 1. adjust cell's width according to the fact that maximal possible width
 210     //    is w.  (this has sense when working with horizontal lines, tables
 211     //    etc.)
 212     // 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height)
 213     //    members) = place items to fit window, according to the width w
 214     virtual void Layout(int w);
 215
 216     // renders the cell
 217     virtual void Draw(wxDC& WXUNUSED(dc),
 218                       int WXUNUSED(x), int WXUNUSED(y),
 219                       int WXUNUSED(view_y1), int WXUNUSED(view_y2),
 220                       wxHtmlRenderingInfo& WXUNUSED(info)) {}
 221
 222     // proceed drawing actions in case the cell is not visible (scrolled out of
 223     // screen).  This is needed to change fonts, colors and so on.
 224     virtual void DrawInvisible(wxDC& WXUNUSED(dc),
 225                                int WXUNUSED(x), int WXUNUSED(y),
 226                                wxHtmlRenderingInfo& WXUNUSED(info)) {}
 227
 228     // This method returns pointer to the FIRST cell for that
 229     // the condition
 230     // is true. It first checks if the condition is true for this
 231     // cell and then calls m_Next->Find(). (Note: it checks
 232     // all subcells if the cell is container)
 233     // Condition is unique condition identifier (see htmldefs.h)
 234     // (user-defined condition IDs should start from 10000)
 235     // and param is optional parameter
 236     // Example : m_Cell->Find(wxHTML_COND_ISANCHOR, "news");
 237     //   returns pointer to anchor news
 238     virtual const wxHtmlCell* Find(int condition, const void* param) const;
 239
 240     // This function is called when mouse button is clicked over the cell.
 241     //
 242     // Parent is pointer to wxHtmlWindow that generated the event
 243     // HINT: if this handling is not enough for you you should use
 244     //       wxHtmlWidgetCell
 245     virtual void OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event);
 246
 247     // This method used to adjust pagebreak position. The parameter is variable
 248     // that contains y-coordinate of page break (= horizontal line that should
 249     // not be crossed by words, images etc.). If this cell cannot be divided
 250     // into two pieces (each one on another page) then it moves the pagebreak
 251     // few pixels up.
 252     //
 253     // Returned value : true if pagebreak was modified, false otherwise
 254     // Usage : while (container->AdjustPagebreak(&p)) {}
 255     virtual bool AdjustPagebreak(int *pagebreak,
 256                                  int *known_pagebreaks = NULL,
 257                                  int number_of_pages = 0) const;
 258
 259     // Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
 260     // is true - the cell can be split on two pages
 261     void SetCanLiveOnPagebreak(bool can) { m_CanLiveOnPagebreak = can; }
 262
 263     // Can the line be broken before this cell?
 264     virtual bool IsLinebreakAllowed() const
 265         { return !IsFormattingCell(); }
 266
 267     // Returns true for simple == terminal cells, i.e. not composite ones.
 268     // This if for internal usage only and may disappear in future versions!
 269     virtual bool IsTerminalCell() const { return true; }
 270
 271     // Find a cell inside this cell positioned at the given coordinates
 272     // (relative to this's positions). Returns NULL if no such cell exists.
 273     // The flag can be used to specify whether to look for terminal or
 274     // nonterminal cells or both. In either case, returned cell is deepest
 275     // cell in cells tree that contains [x,y].
 276     virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y,
 277                                   unsigned flags = wxHTML_FIND_EXACT) const;
 278
 279     // Returns absolute position of the cell on HTML canvas
 280     wxPoint GetAbsPos() const;
 281
 282     // Returns first (last) terminal cell inside this cell. It may return NULL,
 283     // but it is rare -- only if there are no terminals in the tree.
 284     virtual wxHtmlCell *GetFirstTerminal() const
 285         { return wxConstCast(this, wxHtmlCell); }
 286     virtual wxHtmlCell *GetLastTerminal() const
 287         { return wxConstCast(this, wxHtmlCell); }
 288
 289     // Returns cell's depth, i.e. how far under the root cell it is
 290     // (if it is the root, depth is 0)
 291     unsigned GetDepth() const;
 292
 293     // Returns true if the cell appears before 'cell' in natural order of
 294     // cells (= as they are read). If cell A is (grand)parent of cell B,
 295     // then both A.IsBefore(B) and B.IsBefore(A) always return true.
 296     bool IsBefore(wxHtmlCell *cell) const;
 297
 298     // Converts the cell into text representation. If sel != NULL then
 299     // only part of the cell inside the selection is converted.
 300     virtual wxString ConvertToText(wxHtmlSelection *WXUNUSED(sel)) const
 301         { return wxEmptyString; }
 302
 303 protected:
 304     wxHtmlCell *m_Next;
 305             // pointer to the next cell
 306     wxHtmlContainerCell *m_Parent;
 307             // pointer to parent cell
 308     long m_Width, m_Height, m_Descent;
 309             // dimensions of fragment
 310             // m_Descent is used to position text&images..
 311     long m_PosX, m_PosY;
 312             // position where the fragment is drawn
 313     wxHtmlLinkInfo *m_Link;
 314             // destination address if this fragment is hypertext link, NULL otherwise
 315     bool m_CanLiveOnPagebreak;
 316             // true if this cell can be placed on pagebreak, false otherwise
 317     wxString m_id;
 318             // unique identifier of the cell, generated from "id" property of tags
 319
 320     DECLARE_ABSTRACT_CLASS(wxHtmlCell)
 321     DECLARE_NO_COPY_CLASS(wxHtmlCell)
 322 };
 323
 324
 325
 326
 327 // ----------------------------------------------------------------------------
 328 // Inherited cells:
 329 // ----------------------------------------------------------------------------
 330
 331
 332 // ----------------------------------------------------------------------------
 333 // wxHtmlWordCell
 334 //                  Single word in input stream.
 335 // ----------------------------------------------------------------------------
 336
 337 class WXDLLIMPEXP_HTML wxHtmlWordCell : public wxHtmlCell
 338 {
 339 public:
 340     wxHtmlWordCell(const wxString& word, wxDC& dc);
 341     void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 342               wxHtmlRenderingInfo& info);
 343     wxCursor GetCursor() const;
 344     wxString ConvertToText(wxHtmlSelection *sel) const;
 345     bool IsLinebreakAllowed() const { return m_allowLinebreak; }
 346
 347     void SetPreviousWord(wxHtmlWordCell *cell);
 348
 349 protected:
 350     void SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const;
 351     void Split(wxDC& dc,
 352                const wxPoint& selFrom, const wxPoint& selTo,
 353                unsigned& pos1, unsigned& pos2) const;
 354
 355     wxString m_Word;
 356     bool     m_allowLinebreak;
 357
 358     DECLARE_ABSTRACT_CLASS(wxHtmlWordCell)
 359     DECLARE_NO_COPY_CLASS(wxHtmlWordCell)
 360 };
 361
 362
 363
 364
 365
 366 // Container contains other cells, thus forming tree structure of rendering
 367 // elements. Basic code of layout algorithm is contained in this class.
 368 class WXDLLIMPEXP_HTML wxHtmlContainerCell : public wxHtmlCell
 369 {
 370 public:
 371     wxHtmlContainerCell(wxHtmlContainerCell *parent);
 372     ~wxHtmlContainerCell();
 373
 374     virtual void Layout(int w);
 375     virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 376                       wxHtmlRenderingInfo& info);
 377     virtual void DrawInvisible(wxDC& dc, int x, int y,
 378                                wxHtmlRenderingInfo& info);
 379     virtual bool AdjustPagebreak(int *pagebreak, int *known_pagebreaks = NULL, int number_of_pages = 0) const;
 380
 381     // insert cell at the end of m_Cells list
 382     void InsertCell(wxHtmlCell *cell);
 383
 384     // sets horizontal/vertical alignment
 385     void SetAlignHor(int al) {m_AlignHor = al; m_LastLayout = -1;}
 386     int GetAlignHor() const {return m_AlignHor;}
 387     void SetAlignVer(int al) {m_AlignVer = al; m_LastLayout = -1;}
 388     int GetAlignVer() const {return m_AlignVer;}
 389
 390     // sets left-border indentation. units is one of wxHTML_UNITS_* constants
 391     // what is combination of wxHTML_INDENT_*
 392     void SetIndent(int i, int what, int units = wxHTML_UNITS_PIXELS);
 393     // returns the indentation. ind is one of wxHTML_INDENT_* constants
 394     int GetIndent(int ind) const;
 395     // returns type of value returned by GetIndent(ind)
 396     int GetIndentUnits(int ind) const;
 397
 398     // sets alignment info based on given tag's params
 399     void SetAlign(const wxHtmlTag& tag);
 400     // sets floating width adjustment
 401     // (examples : 32 percent of parent container,
 402     // -15 pixels percent (this means 100 % - 15 pixels)
 403     void SetWidthFloat(int w, int units) {m_WidthFloat = w; m_WidthFloatUnits = units; m_LastLayout = -1;}
 404     void SetWidthFloat(const wxHtmlTag& tag, double pixel_scale = 1.0);
 405     // sets minimal height of this container.
 406     void SetMinHeight(int h, int align = wxHTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align; m_LastLayout = -1;}
 407
 408     void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = true; m_BkColour = clr;}
 409     // returns background colour (of wxNullColour if none set), so that widgets can
 410     // adapt to it:
 411     wxColour GetBackgroundColour();
 412     void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = true; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
 413     virtual wxHtmlLinkInfo* GetLink(int x = 0, int y = 0) const;
 414     virtual const wxHtmlCell* Find(int condition, const void* param) const;
 415     virtual void OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event);
 416
 417     virtual wxHtmlCell* GetFirstChild() const { return m_Cells; }
 418 #if WXWIN_COMPATIBILITY_2_4
 419     wxDEPRECATED( wxHtmlCell* GetFirstCell() const );
 420 #endif
 421
 422     // see comment in wxHtmlCell about this method
 423     virtual bool IsTerminalCell() const { return false; }
 424
 425     virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y,
 426                                   unsigned flags = wxHTML_FIND_EXACT) const;
 427
 428     virtual wxHtmlCell *GetFirstTerminal() const;
 429     virtual wxHtmlCell *GetLastTerminal() const;
 430
 431
 432     // Removes indentation on top or bottom of the container (i.e. above or
 433     // below first/last terminal cell). For internal use only.
 434     void RemoveExtraSpacing(bool top, bool bottom);
 435
 436     // Returns the maximum possible length of the container.
 437     // Call Layout at least once before using GetMaxTotalWidth()
 438     virtual int GetMaxTotalWidth() const { return m_MaxTotalWidth; }
 439
 440 protected:
 441     void UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
 442                                  wxHtmlCell *cell) const;
 443     void UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
 444                                   wxHtmlCell *cell) const;
 445
 446 protected:
 447     int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom;
 448             // indentation of subcells. There is always m_Indent pixels
 449             // big space between given border of the container and the subcells
 450             // it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels
 451     int m_MinHeight, m_MinHeightAlign;
 452         // minimal height.
 453     wxHtmlCell *m_Cells, *m_LastCell;
 454             // internal cells, m_Cells points to the first of them, m_LastCell to the last one.
 455             // (LastCell is needed only to speed-up InsertCell)
 456     int m_AlignHor, m_AlignVer;
 457             // alignment horizontal and vertical (left, center, right)
 458     int m_WidthFloat, m_WidthFloatUnits;
 459             // width float is used in adjustWidth
 460     bool m_UseBkColour;
 461     wxColour m_BkColour;
 462             // background color of this container
 463     bool m_UseBorder;
 464     wxColour m_BorderColour1, m_BorderColour2;
 465             // borders color of this container
 466     int m_LastLayout;
 467             // if != -1 then call to Layout may be no-op
 468             // if previous call to Layout has same argument
 469     int m_MaxTotalWidth;
 470             // Maximum possible length if ignoring line wrap
 471
 472
 473     DECLARE_ABSTRACT_CLASS(wxHtmlContainerCell)
 474     DECLARE_NO_COPY_CLASS(wxHtmlContainerCell)
 475 };
 476
 477 #if WXWIN_COMPATIBILITY_2_4
 478 inline wxHtmlCell* wxHtmlContainerCell::GetFirstCell() const
 479     { return GetFirstChild(); }
 480 #endif
 481
 482
 483
 484
 485 // ---------------------------------------------------------------------------
 486 // wxHtmlColourCell
 487 //                  Color changer.
 488 // ---------------------------------------------------------------------------
 489
 490 class WXDLLIMPEXP_HTML wxHtmlColourCell : public wxHtmlCell
 491 {
 492 public:
 493     wxHtmlColourCell(const wxColour& clr, int flags = wxHTML_CLR_FOREGROUND) : wxHtmlCell() {m_Colour = clr; m_Flags = flags;}
 494     virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 495                       wxHtmlRenderingInfo& info);
 496     virtual void DrawInvisible(wxDC& dc, int x, int y,
 497                                wxHtmlRenderingInfo& info);
 498
 499 protected:
 500     wxColour m_Colour;
 501     unsigned m_Flags;
 502
 503     DECLARE_ABSTRACT_CLASS(wxHtmlColourCell)
 504     DECLARE_NO_COPY_CLASS(wxHtmlColourCell)
 505 };
 506
 507
 508
 509
 510 //--------------------------------------------------------------------------------
 511 // wxHtmlFontCell
 512 //                  Sets actual font used for text rendering
 513 //--------------------------------------------------------------------------------
 514
 515 class WXDLLIMPEXP_HTML wxHtmlFontCell : public wxHtmlCell
 516 {
 517 public:
 518     wxHtmlFontCell(wxFont *font) : wxHtmlCell() { m_Font = (*font); }
 519     virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 520                       wxHtmlRenderingInfo& info);
 521     virtual void DrawInvisible(wxDC& dc, int x, int y,
 522                                wxHtmlRenderingInfo& info);
 523
 524 protected:
 525     wxFont m_Font;
 526
 527     DECLARE_ABSTRACT_CLASS(wxHtmlFontCell)
 528     DECLARE_NO_COPY_CLASS(wxHtmlFontCell)
 529 };
 530
 531
 532
 533
 534
 535
 536 //--------------------------------------------------------------------------------
 537 // wxHtmlwidgetCell
 538 //                  This cell is connected with wxWindow object
 539 //                  You can use it to insert windows into HTML page
 540 //                  (buttons, input boxes etc.)
 541 //--------------------------------------------------------------------------------
 542
 543 class WXDLLIMPEXP_HTML wxHtmlWidgetCell : public wxHtmlCell
 544 {
 545 public:
 546     // !!! wnd must have correct parent!
 547     // if w != 0 then the m_Wnd has 'floating' width - it adjust
 548     // it's width according to parent container's width
 549     // (w is percent of parent's width)
 550     wxHtmlWidgetCell(wxWindow *wnd, int w = 0);
 551     ~wxHtmlWidgetCell() { m_Wnd->Destroy(); }
 552     virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 553                       wxHtmlRenderingInfo& info);
 554     virtual void DrawInvisible(wxDC& dc, int x, int y,
 555                                wxHtmlRenderingInfo& info);
 556     virtual void Layout(int w);
 557
 558 protected:
 559     wxWindow* m_Wnd;
 560     int m_WidthFloat;
 561             // width float is used in adjustWidth (it is in percents)
 562
 563     DECLARE_ABSTRACT_CLASS(wxHtmlWidgetCell)
 564     DECLARE_NO_COPY_CLASS(wxHtmlWidgetCell)
 565 };
 566
 567
 568
 569 //--------------------------------------------------------------------------------
 570 // wxHtmlLinkInfo
 571 //                  Internal data structure. It represents hypertext link
 572 //--------------------------------------------------------------------------------
 573
 574 class WXDLLIMPEXP_HTML wxHtmlLinkInfo : public wxObject
 575 {
 576 public:
 577     wxHtmlLinkInfo() : wxObject()
 578           { m_Href = m_Target = wxEmptyString; m_Event = NULL, m_Cell = NULL; }
 579     wxHtmlLinkInfo(const wxString& href, const wxString& target = wxEmptyString) : wxObject()
 580           { m_Href = href; m_Target = target; m_Event = NULL, m_Cell = NULL; }
 581     wxHtmlLinkInfo(const wxHtmlLinkInfo& l) : wxObject()
 582           { m_Href = l.m_Href, m_Target = l.m_Target, m_Event = l.m_Event;
 583             m_Cell = l.m_Cell; }
 584     wxHtmlLinkInfo& operator=(const wxHtmlLinkInfo& l)
 585           { m_Href = l.m_Href, m_Target = l.m_Target, m_Event = l.m_Event;
 586             m_Cell = l.m_Cell; return *this; }
 587
 588     void SetEvent(const wxMouseEvent *e) { m_Event = e; }
 589     void SetHtmlCell(const wxHtmlCell *e) { m_Cell = e; }
 590
 591     wxString GetHref() const { return m_Href; }
 592     wxString GetTarget() const { return m_Target; }
 593     const wxMouseEvent* GetEvent() const { return m_Event; }
 594     const wxHtmlCell* GetHtmlCell() const { return m_Cell; }
 595
 596 private:
 597     wxString m_Href, m_Target;
 598     const wxMouseEvent *m_Event;
 599     const wxHtmlCell *m_Cell;
 600 };
 601
 602
 603
 604 // ----------------------------------------------------------------------------
 605 // wxHtmlTerminalCellsInterator
 606 // ----------------------------------------------------------------------------
 607
 608 class WXDLLIMPEXP_HTML wxHtmlTerminalCellsInterator
 609 {
 610 public:
 611     wxHtmlTerminalCellsInterator(const wxHtmlCell *from, const wxHtmlCell *to)
 612         : m_to(to), m_pos(from) {}
 613
 614     operator bool() const { return m_pos != NULL; }
 615     const wxHtmlCell* operator++();
 616     const wxHtmlCell* operator->() const { return m_pos; }
 617     const wxHtmlCell* operator*() const { return m_pos; }
 618
 619 private:
 620     const wxHtmlCell *m_to, *m_pos;
 621 };
 622
 623
 624
 625 #endif // wxUSE_HTML
 626
 627 #endif // _WX_HTMLCELL_H_
 628