1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser
4 // as a basic visual element of HTML page
5 // Author: Vaclav Slavik
7 // Copyright: (c) 1999-2003 Vaclav Slavik
8 // Licence: wxWindows Licence
9 /////////////////////////////////////////////////////////////////////////////
12 #ifndef _WX_HTMLCELL_H_
13 #define _WX_HTMLCELL_H_
15 #if defined(__GNUG__) && !defined(__APPLE__)
16 #pragma interface "htmlcell.h"
23 #include "wx/html/htmltag.h"
24 #include "wx/html/htmldefs.h"
25 #include "wx/window.h"
28 class WXDLLEXPORT wxHtmlLinkInfo
;
29 class WXDLLEXPORT wxHtmlCell
;
30 class WXDLLEXPORT wxHtmlContainerCell
;
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 WXDLLEXPORT wxHtmlSelection
40 : m_fromPos(wxDefaultPosition
), m_toPos(wxDefaultPosition
),
41 m_fromPrivPos(wxDefaultPosition
), m_toPrivPos(wxDefaultPosition
),
42 m_fromCell(NULL
), m_toCell(NULL
) {}
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
);
48 const wxHtmlCell
*GetFromCell() const { return m_fromCell
; }
49 const wxHtmlCell
*GetToCell() const { return m_toCell
; }
51 // these values are in absolute coordinates:
52 const wxPoint
& GetFromPos() const { return m_fromPos
; }
53 const wxPoint
& GetToPos() const { return m_toPos
; }
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
; }
62 const bool IsEmpty() const
63 { return m_fromPos
== wxDefaultPosition
&&
64 m_toPos
== wxDefaultPosition
; }
67 wxPoint m_fromPos
, m_toPos
;
68 wxPoint m_fromPrivPos
, m_toPrivPos
;
69 const wxHtmlCell
*m_fromCell
, *m_toCell
;
74 enum wxHtmlSelectionState
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
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 WXDLLEXPORT wxHtmlRenderingState
86 wxHtmlRenderingState() : m_selState(wxHTML_SEL_OUT
) {}
88 void SetSelectionState(wxHtmlSelectionState s
) { m_selState
= s
; }
89 wxHtmlSelectionState
GetSelectionState() const { return m_selState
; }
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
; }
97 wxHtmlSelectionState m_selState
;
98 wxColour m_fgColour
, m_bgColour
;
102 // HTML rendering customization. This class is used when rendering wxHtmlCells
104 class WXDLLEXPORT wxHtmlRenderingStyle
107 virtual wxColour
GetSelectedTextColour(const wxColour
& clr
) = 0;
108 virtual wxColour
GetSelectedTextBgColour(const wxColour
& clr
) = 0;
112 class WXDLLEXPORT wxDefaultHtmlRenderingStyle
: public wxHtmlRenderingStyle
115 virtual wxColour
GetSelectedTextColour(const wxColour
& clr
);
116 virtual wxColour
GetSelectedTextBgColour(const wxColour
& clr
);
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 WXDLLEXPORT wxHtmlRenderingInfo
126 wxHtmlRenderingInfo() : m_selection(NULL
), m_style(NULL
) {}
128 void SetSelection(wxHtmlSelection
*s
) { m_selection
= s
; }
129 wxHtmlSelection
*GetSelection() const { return m_selection
; }
131 void SetStyle(wxHtmlRenderingStyle
*style
) { m_style
= style
; }
132 wxHtmlRenderingStyle
& GetStyle() { return *m_style
; }
134 wxHtmlRenderingState
& GetState() { return m_state
; }
137 wxHtmlSelection
*m_selection
;
138 wxHtmlRenderingStyle
*m_style
;
139 wxHtmlRenderingState m_state
;
143 // Flags for wxHtmlCell::FindCellByPos
146 wxHTML_FIND_EXACT
= 1,
147 wxHTML_FIND_NEAREST_BEFORE
= 2,
148 wxHTML_FIND_NEAREST_AFTER
= 4
154 // ---------------------------------------------------------------------------
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
160 // ---------------------------------------------------------------------------
163 class WXDLLEXPORT wxHtmlCell
: public wxObject
167 virtual ~wxHtmlCell();
169 void SetParent(wxHtmlContainerCell
*p
) {m_Parent
= p
;}
170 wxHtmlContainerCell
*GetParent() const {return m_Parent
;}
172 int GetPosX() const {return m_PosX
;}
173 int GetPosY() const {return m_PosY
;}
174 int GetWidth() const {return m_Width
;}
175 int GetHeight() const {return m_Height
;}
176 int GetDescent() const {return m_Descent
;}
178 const wxString
& GetId() const { return m_id
; }
179 void SetId(const wxString
& id
) { m_id
= id
; }
181 // returns the link associated with this cell. The position is position
182 // within the cell so it varies from 0 to m_Width, from 0 to m_Height
183 virtual wxHtmlLinkInfo
* GetLink(int WXUNUSED(x
) = 0,
184 int WXUNUSED(y
) = 0) const
187 // Returns cursor to be used when mouse is over the cell:
188 virtual wxCursor
GetCursor() const;
190 // return next cell among parent's cells
191 wxHtmlCell
*GetNext() const {return m_Next
;}
192 // returns first child cell (if there are any, i.e. if this is container):
193 virtual wxHtmlCell
* GetFirstChild() const { return NULL
; }
195 // members writing methods
196 virtual void SetPos(int x
, int y
) {m_PosX
= x
, m_PosY
= y
;}
197 void SetLink(const wxHtmlLinkInfo
& link
);
198 void SetNext(wxHtmlCell
*cell
) {m_Next
= cell
;}
200 // 1. adjust cell's width according to the fact that maximal possible width
201 // is w. (this has sense when working with horizontal lines, tables
203 // 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height)
204 // members) = place items to fit window, according to the width w
205 virtual void Layout(int w
);
208 virtual void Draw(wxDC
& WXUNUSED(dc
),
209 int WXUNUSED(x
), int WXUNUSED(y
),
210 int WXUNUSED(view_y1
), int WXUNUSED(view_y2
),
211 wxHtmlRenderingInfo
& WXUNUSED(info
)) {}
213 // proceed drawing actions in case the cell is not visible (scrolled out of
214 // screen). This is needed to change fonts, colors and so on.
215 virtual void DrawInvisible(wxDC
& WXUNUSED(dc
),
216 int WXUNUSED(x
), int WXUNUSED(y
),
217 wxHtmlRenderingInfo
& WXUNUSED(info
)) {}
219 // This method returns pointer to the FIRST cell for that
221 // is true. It first checks if the condition is true for this
222 // cell and then calls m_Next->Find(). (Note: it checks
223 // all subcells if the cell is container)
224 // Condition is unique condition identifier (see htmldefs.h)
225 // (user-defined condition IDs should start from 10000)
226 // and param is optional parameter
227 // Example : m_Cell->Find(wxHTML_COND_ISANCHOR, "news");
228 // returns pointer to anchor news
229 virtual const wxHtmlCell
* Find(int condition
, const void* param
) const;
231 // This function is called when mouse button is clicked over the cell.
233 // Parent is pointer to wxHtmlWindow that generated the event
234 // HINT: if this handling is not enough for you you should use
236 virtual void OnMouseClick(wxWindow
*parent
, int x
, int y
, const wxMouseEvent
& event
);
238 // This method used to adjust pagebreak position. The parameter is variable
239 // that contains y-coordinate of page break (= horizontal line that should
240 // not be crossed by words, images etc.). If this cell cannot be divided
241 // into two pieces (each one on another page) then it moves the pagebreak
244 // Returned value : true if pagebreak was modified, false otherwise
245 // Usage : while (container->AdjustPagebreak(&p)) {}
246 virtual bool AdjustPagebreak(int *pagebreak
,
247 int *known_pagebreaks
= NULL
,
248 int number_of_pages
= 0) const;
250 // Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
251 // is true - the cell can be split on two pages
252 void SetCanLiveOnPagebreak(bool can
) { m_CanLiveOnPagebreak
= can
; }
254 // Returns y-coordinates that contraint the cell, i.e. left is highest
255 // and right lowest coordinate such that the cell lays between then.
256 // Note: this method does not return meaningful values if you haven't
257 // called Layout() before!
258 virtual void GetHorizontalConstraints(int *left
, int *right
) const;
260 // Returns true for simple == terminal cells, i.e. not composite ones.
261 // This if for internal usage only and may disappear in future versions!
262 virtual bool IsTerminalCell() const { return TRUE
; }
264 // Find a cell inside this cell positioned at the given coordinates
265 // (relative to this's positions). Returns NULL if no such cell exists.
266 // The flag can be used to specify whether to look for terminal or
267 // nonterminal cells or both. In either case, returned cell is deepest
268 // cell in cells tree that contains [x,y].
269 virtual wxHtmlCell
*FindCellByPos(wxCoord x
, wxCoord y
,
270 unsigned flags
= wxHTML_FIND_EXACT
) const;
272 // Returns absolute position of the cell on HTML canvas
273 wxPoint
GetAbsPos() const;
275 // Returns first (last) terminal cell inside this cell. It may return NULL,
276 // but it is rare -- only if there are no terminals in the tree.
277 virtual wxHtmlCell
*GetFirstTerminal() const
278 { return wxConstCast(this, wxHtmlCell
); }
279 virtual wxHtmlCell
*GetLastTerminal() const
280 { return wxConstCast(this, wxHtmlCell
); }
282 // Returns cell's depth, i.e. how far under the root cell it is
283 // (if it is the root, depth is 0)
284 unsigned GetDepth() const;
286 // Returns true if the cell appears before 'cell' in natural order of
287 // cells (= as they are read). If cell A is (grand)parent of cell B,
288 // then both A.IsBefore(B) and B.IsBefore(A) always return true.
289 bool IsBefore(wxHtmlCell
*cell
) const;
291 // Converts the cell into text representation. If sel != NULL then
292 // only part of the cell inside the selection is converted.
293 virtual wxString
ConvertToText(wxHtmlSelection
*WXUNUSED(sel
)) const
294 { return wxEmptyString
; }
298 // pointer to the next cell
299 wxHtmlContainerCell
*m_Parent
;
300 // pointer to parent cell
301 long m_Width
, m_Height
, m_Descent
;
302 // dimensions of fragment
303 // m_Descent is used to position text&images..
305 // position where the fragment is drawn
306 wxHtmlLinkInfo
*m_Link
;
307 // destination address if this fragment is hypertext link, NULL otherwise
308 bool m_CanLiveOnPagebreak
;
309 // true if this cell can be placed on pagebreak, false otherwise
311 // unique identifier of the cell, generated from "id" property of tags
313 DECLARE_NO_COPY_CLASS(wxHtmlCell
)
319 // ----------------------------------------------------------------------------
321 // ----------------------------------------------------------------------------
324 // ----------------------------------------------------------------------------
326 // Single word in input stream.
327 // ----------------------------------------------------------------------------
329 class WXDLLEXPORT wxHtmlWordCell
: public wxHtmlCell
332 wxHtmlWordCell(const wxString
& word
, wxDC
& dc
);
333 void Draw(wxDC
& dc
, int x
, int y
, int view_y1
, int view_y2
,
334 wxHtmlRenderingInfo
& info
);
335 wxCursor
GetCursor() const;
336 wxString
ConvertToText(wxHtmlSelection
*sel
) const;
339 void SetSelectionPrivPos(wxDC
& dc
, wxHtmlSelection
*s
) const;
341 const wxPoint
& selFrom
, const wxPoint
& selTo
,
342 unsigned& pos1
, unsigned& pos2
) const;
351 // Container contains other cells, thus forming tree structure of rendering
352 // elements. Basic code of layout algorithm is contained in this class.
353 class WXDLLEXPORT wxHtmlContainerCell
: public wxHtmlCell
356 wxHtmlContainerCell(wxHtmlContainerCell
*parent
);
357 ~wxHtmlContainerCell();
359 virtual void Layout(int w
);
360 virtual void Draw(wxDC
& dc
, int x
, int y
, int view_y1
, int view_y2
,
361 wxHtmlRenderingInfo
& info
);
362 virtual void DrawInvisible(wxDC
& dc
, int x
, int y
,
363 wxHtmlRenderingInfo
& info
);
364 virtual bool AdjustPagebreak(int *pagebreak
, int *known_pagebreaks
= NULL
, int number_of_pages
= 0) const;
366 // insert cell at the end of m_Cells list
367 void InsertCell(wxHtmlCell
*cell
);
369 // sets horizontal/vertical alignment
370 void SetAlignHor(int al
) {m_AlignHor
= al
; m_LastLayout
= -1;}
371 int GetAlignHor() const {return m_AlignHor
;}
372 void SetAlignVer(int al
) {m_AlignVer
= al
; m_LastLayout
= -1;}
373 int GetAlignVer() const {return m_AlignVer
;}
375 // sets left-border indentation. units is one of wxHTML_UNITS_* constants
376 // what is combination of wxHTML_INDENT_*
377 void SetIndent(int i
, int what
, int units
= wxHTML_UNITS_PIXELS
);
378 // returns the indentation. ind is one of wxHTML_INDENT_* constants
379 int GetIndent(int ind
) const;
380 // returns type of value returned by GetIndent(ind)
381 int GetIndentUnits(int ind
) const;
383 // sets alignment info based on given tag's params
384 void SetAlign(const wxHtmlTag
& tag
);
385 // sets floating width adjustment
386 // (examples : 32 percent of parent container,
387 // -15 pixels percent (this means 100 % - 15 pixels)
388 void SetWidthFloat(int w
, int units
) {m_WidthFloat
= w
; m_WidthFloatUnits
= units
; m_LastLayout
= -1;}
389 void SetWidthFloat(const wxHtmlTag
& tag
, double pixel_scale
= 1.0);
390 // sets minimal height of this container.
391 void SetMinHeight(int h
, int align
= wxHTML_ALIGN_TOP
) {m_MinHeight
= h
; m_MinHeightAlign
= align
; m_LastLayout
= -1;}
393 void SetBackgroundColour(const wxColour
& clr
) {m_UseBkColour
= TRUE
; m_BkColour
= clr
;}
394 // returns background colour (of wxNullColour if none set), so that widgets can
396 wxColour
GetBackgroundColour();
397 void SetBorder(const wxColour
& clr1
, const wxColour
& clr2
) {m_UseBorder
= TRUE
; m_BorderColour1
= clr1
, m_BorderColour2
= clr2
;}
398 virtual wxHtmlLinkInfo
* GetLink(int x
= 0, int y
= 0) const;
399 virtual const wxHtmlCell
* Find(int condition
, const void* param
) const;
400 virtual void OnMouseClick(wxWindow
*parent
, int x
, int y
, const wxMouseEvent
& event
);
401 virtual void GetHorizontalConstraints(int *left
, int *right
) const;
403 virtual wxHtmlCell
* GetFirstChild() const { return m_Cells
; }
404 #if WXWIN_COMPATIBILITY_2_4
405 wxDEPRECATED( wxHtmlCell
* GetFirstCell() const );
408 // see comment in wxHtmlCell about this method
409 virtual bool IsTerminalCell() const { return FALSE
; }
411 virtual wxHtmlCell
*FindCellByPos(wxCoord x
, wxCoord y
,
412 unsigned flags
= wxHTML_FIND_EXACT
) const;
414 virtual wxHtmlCell
*GetFirstTerminal() const;
415 virtual wxHtmlCell
*GetLastTerminal() const;
418 void UpdateRenderingStatePre(wxHtmlRenderingInfo
& info
,
419 wxHtmlCell
*cell
) const;
420 void UpdateRenderingStatePost(wxHtmlRenderingInfo
& info
,
421 wxHtmlCell
*cell
) const;
424 int m_IndentLeft
, m_IndentRight
, m_IndentTop
, m_IndentBottom
;
425 // indentation of subcells. There is always m_Indent pixels
426 // big space between given border of the container and the subcells
427 // it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels
428 int m_MinHeight
, m_MinHeightAlign
;
430 wxHtmlCell
*m_Cells
, *m_LastCell
;
431 // internal cells, m_Cells points to the first of them, m_LastCell to the last one.
432 // (LastCell is needed only to speed-up InsertCell)
433 int m_AlignHor
, m_AlignVer
;
434 // alignment horizontal and vertical (left, center, right)
435 int m_WidthFloat
, m_WidthFloatUnits
;
436 // width float is used in adjustWidth
439 // background color of this container
441 wxColour m_BorderColour1
, m_BorderColour2
;
442 // borders color of this container
444 // if != -1 then call to Layout may be no-op
445 // if previous call to Layout has same argument
447 DECLARE_NO_COPY_CLASS(wxHtmlContainerCell
)
450 #if WXWIN_COMPATIBILITY_2_4
451 inline wxHtmlCell
* wxHtmlContainerCell::GetFirstCell() const
452 { return GetFirstChild(); }
458 // ---------------------------------------------------------------------------
461 // ---------------------------------------------------------------------------
463 class WXDLLEXPORT wxHtmlColourCell
: public wxHtmlCell
466 wxHtmlColourCell(const wxColour
& clr
, int flags
= wxHTML_CLR_FOREGROUND
) : wxHtmlCell() {m_Colour
= clr
; m_Flags
= flags
;}
467 virtual void Draw(wxDC
& dc
, int x
, int y
, int view_y1
, int view_y2
,
468 wxHtmlRenderingInfo
& info
);
469 virtual void DrawInvisible(wxDC
& dc
, int x
, int y
,
470 wxHtmlRenderingInfo
& info
);
480 //--------------------------------------------------------------------------------
482 // Sets actual font used for text rendering
483 //--------------------------------------------------------------------------------
485 class WXDLLEXPORT wxHtmlFontCell
: public wxHtmlCell
488 wxHtmlFontCell(wxFont
*font
) : wxHtmlCell() { m_Font
= (*font
); }
489 virtual void Draw(wxDC
& dc
, int x
, int y
, int view_y1
, int view_y2
,
490 wxHtmlRenderingInfo
& info
);
491 virtual void DrawInvisible(wxDC
& dc
, int x
, int y
,
492 wxHtmlRenderingInfo
& info
);
503 //--------------------------------------------------------------------------------
505 // This cell is connected with wxWindow object
506 // You can use it to insert windows into HTML page
507 // (buttons, input boxes etc.)
508 //--------------------------------------------------------------------------------
510 class WXDLLEXPORT wxHtmlWidgetCell
: public wxHtmlCell
513 // !!! wnd must have correct parent!
514 // if w != 0 then the m_Wnd has 'floating' width - it adjust
515 // it's width according to parent container's width
516 // (w is percent of parent's width)
517 wxHtmlWidgetCell(wxWindow
*wnd
, int w
= 0);
518 ~wxHtmlWidgetCell() { m_Wnd
->Destroy(); }
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 virtual void Layout(int w
);
528 // width float is used in adjustWidth (it is in percents)
530 DECLARE_NO_COPY_CLASS(wxHtmlWidgetCell
)
535 //--------------------------------------------------------------------------------
537 // Internal data structure. It represents hypertext link
538 //--------------------------------------------------------------------------------
540 class WXDLLEXPORT wxHtmlLinkInfo
: public wxObject
543 wxHtmlLinkInfo() : wxObject()
544 { m_Href
= m_Target
= wxEmptyString
; m_Event
= NULL
, m_Cell
= NULL
; }
545 wxHtmlLinkInfo(const wxString
& href
, const wxString
& target
= wxEmptyString
) : wxObject()
546 { m_Href
= href
; m_Target
= target
; m_Event
= NULL
, m_Cell
= NULL
; }
547 wxHtmlLinkInfo(const wxHtmlLinkInfo
& l
) : wxObject()
548 { m_Href
= l
.m_Href
, m_Target
= l
.m_Target
, m_Event
= l
.m_Event
;
550 wxHtmlLinkInfo
& operator=(const wxHtmlLinkInfo
& l
)
551 { m_Href
= l
.m_Href
, m_Target
= l
.m_Target
, m_Event
= l
.m_Event
;
552 m_Cell
= l
.m_Cell
; return *this; }
554 void SetEvent(const wxMouseEvent
*e
) { m_Event
= e
; }
555 void SetHtmlCell(const wxHtmlCell
*e
) { m_Cell
= e
; }
557 wxString
GetHref() const { return m_Href
; }
558 wxString
GetTarget() const { return m_Target
; }
559 const wxMouseEvent
* GetEvent() const { return m_Event
; }
560 const wxHtmlCell
* GetHtmlCell() const { return m_Cell
; }
563 wxString m_Href
, m_Target
;
564 const wxMouseEvent
*m_Event
;
565 const wxHtmlCell
*m_Cell
;
570 // ----------------------------------------------------------------------------
571 // wxHtmlTerminalCellsInterator
572 // ----------------------------------------------------------------------------
574 class WXDLLEXPORT wxHtmlTerminalCellsInterator
577 wxHtmlTerminalCellsInterator(const wxHtmlCell
*from
, const wxHtmlCell
*to
)
578 : m_to(to
), m_pos(from
) {}
580 operator bool() const { return m_pos
!= NULL
; }
581 const wxHtmlCell
* operator++();
582 const wxHtmlCell
* operator->() const { return m_pos
; }
583 const wxHtmlCell
* operator*() const { return m_pos
; }
586 const wxHtmlCell
*m_to
, *m_pos
;
593 #endif // _WX_HTMLCELL_H_