// as a basic visual element of HTML page
// Author: Vaclav Slavik
// RCS-ID: $Id$
-// Copyright: (c) 1999 Vaclav Slavik
-// Licence: wxWindows Licence
+// Copyright: (c) 1999-2003 Vaclav Slavik
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_HTMLCELL_H_
#define _WX_HTMLCELL_H_
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "htmlcell.h"
#endif
#include "wx/window.h"
-class WXDLLEXPORT wxHtmlLinkInfo;
-class WXDLLEXPORT wxHtmlCell;
-class WXDLLEXPORT wxHtmlContainerCell;
+class WXDLLIMPEXP_HTML wxHtmlLinkInfo;
+class WXDLLIMPEXP_HTML wxHtmlCell;
+class WXDLLIMPEXP_HTML wxHtmlContainerCell;
-//--------------------------------------------------------------------------------
+
+// wxHtmlSelection is data holder with information about text selection.
+// Selection is defined by two positions (beginning and end of the selection)
+// and two leaf(!) cells at these positions.
+class WXDLLIMPEXP_HTML wxHtmlSelection
+{
+public:
+ wxHtmlSelection()
+ : m_fromPos(wxDefaultPosition), m_toPos(wxDefaultPosition),
+ m_fromPrivPos(wxDefaultPosition), m_toPrivPos(wxDefaultPosition),
+ m_fromCell(NULL), m_toCell(NULL) {}
+
+ void Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
+ const wxPoint& toPos, const wxHtmlCell *toCell);
+ void Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell);
+
+ const wxHtmlCell *GetFromCell() const { return m_fromCell; }
+ const wxHtmlCell *GetToCell() const { return m_toCell; }
+
+ // these values are in absolute coordinates:
+ const wxPoint& GetFromPos() const { return m_fromPos; }
+ const wxPoint& GetToPos() const { return m_toPos; }
+
+ // these are From/ToCell's private data
+ const wxPoint& GetFromPrivPos() const { return m_fromPrivPos; }
+ const wxPoint& GetToPrivPos() const { return m_toPrivPos; }
+ void SetFromPrivPos(const wxPoint& pos) { m_fromPrivPos = pos; }
+ void SetToPrivPos(const wxPoint& pos) { m_toPrivPos = pos; }
+ void ClearPrivPos() { m_toPrivPos = m_fromPrivPos = wxDefaultPosition; }
+
+ bool IsEmpty() const
+ { return m_fromPos == wxDefaultPosition &&
+ m_toPos == wxDefaultPosition; }
+
+private:
+ wxPoint m_fromPos, m_toPos;
+ wxPoint m_fromPrivPos, m_toPrivPos;
+ const wxHtmlCell *m_fromCell, *m_toCell;
+};
+
+
+
+enum wxHtmlSelectionState
+{
+ wxHTML_SEL_OUT, // currently rendered cell is outside the selection
+ wxHTML_SEL_IN, // ... is inside selection
+ wxHTML_SEL_CHANGING // ... is the cell on which selection state changes
+};
+
+// Selection state is passed to wxHtmlCell::Draw so that it can render itself
+// differently e.g. when inside text selection or outside it.
+class WXDLLIMPEXP_HTML wxHtmlRenderingState
+{
+public:
+ wxHtmlRenderingState() : m_selState(wxHTML_SEL_OUT) {}
+
+ void SetSelectionState(wxHtmlSelectionState s) { m_selState = s; }
+ wxHtmlSelectionState GetSelectionState() const { return m_selState; }
+
+ void SetFgColour(const wxColour& c) { m_fgColour = c; }
+ const wxColour& GetFgColour() const { return m_fgColour; }
+ void SetBgColour(const wxColour& c) { m_bgColour = c; }
+ const wxColour& GetBgColour() const { return m_bgColour; }
+
+private:
+ wxHtmlSelectionState m_selState;
+ wxColour m_fgColour, m_bgColour;
+};
+
+
+// HTML rendering customization. This class is used when rendering wxHtmlCells
+// as a callback:
+class WXDLLIMPEXP_HTML wxHtmlRenderingStyle
+{
+public:
+ virtual wxColour GetSelectedTextColour(const wxColour& clr) = 0;
+ virtual wxColour GetSelectedTextBgColour(const wxColour& clr) = 0;
+};
+
+// Standard style:
+class WXDLLIMPEXP_HTML wxDefaultHtmlRenderingStyle : public wxHtmlRenderingStyle
+{
+public:
+ virtual wxColour GetSelectedTextColour(const wxColour& clr);
+ virtual wxColour GetSelectedTextBgColour(const wxColour& clr);
+};
+
+
+// Information given to cells when drawing them. Contains rendering state,
+// selection information and rendering style object that can be used to
+// customize the output.
+class WXDLLIMPEXP_HTML wxHtmlRenderingInfo
+{
+public:
+ wxHtmlRenderingInfo() : m_selection(NULL), m_style(NULL) {}
+
+ void SetSelection(wxHtmlSelection *s) { m_selection = s; }
+ wxHtmlSelection *GetSelection() const { return m_selection; }
+
+ void SetStyle(wxHtmlRenderingStyle *style) { m_style = style; }
+ wxHtmlRenderingStyle& GetStyle() { return *m_style; }
+
+ wxHtmlRenderingState& GetState() { return m_state; }
+
+protected:
+ wxHtmlSelection *m_selection;
+ wxHtmlRenderingStyle *m_style;
+ wxHtmlRenderingState m_state;
+};
+
+
+// Flags for wxHtmlCell::FindCellByPos
+enum
+{
+ wxHTML_FIND_EXACT = 1,
+ wxHTML_FIND_NEAREST_BEFORE = 2,
+ wxHTML_FIND_NEAREST_AFTER = 4
+};
+
+
+
+
+// ---------------------------------------------------------------------------
// wxHtmlCell
-// Internal data structure. It represents fragments of parsed HTML
-// page - a word, picture, table, horizontal line and so on.
-// It is used by wxHtmlWindow to represent HTML page in memory.
-//--------------------------------------------------------------------------------
+// Internal data structure. It represents fragments of parsed
+// HTML page - a word, picture, table, horizontal line and so
+// on. It is used by wxHtmlWindow to represent HTML page in
+// memory.
+// ---------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlCell : public wxObject
+class WXDLLIMPEXP_HTML wxHtmlCell : public wxObject
{
public:
wxHtmlCell();
int GetPosX() const {return m_PosX;}
int GetPosY() const {return m_PosY;}
int GetWidth() const {return m_Width;}
+
+ // Returns the maximum possible length of the cell.
+ // Call Layout at least once before using GetMaxTotalWidth()
+ virtual int GetMaxTotalWidth() const { return m_Width; }
+
int GetHeight() const {return m_Height;}
int GetDescent() const {return m_Descent;}
- // returns the link associated with this cell. The position is position within
- // the cell so it varies from 0 to m_Width, from 0 to m_Height
- virtual wxHtmlLinkInfo* GetLink(int WXUNUSED(x) = 0, int WXUNUSED(y) = 0) const
+ // Formatting cells are not visible on the screen, they only alter
+ // renderer's state.
+ bool IsFormattingCell() const { return m_Width == 0 && m_Height == 0; }
+
+ const wxString& GetId() const { return m_id; }
+ void SetId(const wxString& id) { m_id = id; }
+
+ // returns the link associated with this cell. The position is position
+ // within the cell so it varies from 0 to m_Width, from 0 to m_Height
+ virtual wxHtmlLinkInfo* GetLink(int WXUNUSED(x) = 0,
+ int WXUNUSED(y) = 0) const
{ return m_Link; }
- // members access methods
+ // Returns cursor to be used when mouse is over the cell:
+ virtual wxCursor GetCursor() const;
+
+ // return next cell among parent's cells
wxHtmlCell *GetNext() const {return m_Next;}
+ // returns first child cell (if there are any, i.e. if this is container):
+ virtual wxHtmlCell* GetFirstChild() const { return NULL; }
- // members writin methods
+ // members writing methods
virtual void SetPos(int x, int y) {m_PosX = x, m_PosY = y;}
void SetLink(const wxHtmlLinkInfo& link);
void SetNext(wxHtmlCell *cell) {m_Next = cell;}
- // 1. adjust cell's width according to the fact that maximal possible width is w.
- // (this has sense when working with horizontal lines, tables etc.)
- // 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height) members)
- // = place items to fit window, according to the width w
+ // 1. adjust cell's width according to the fact that maximal possible width
+ // is w. (this has sense when working with horizontal lines, tables
+ // etc.)
+ // 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height)
+ // members) = place items to fit window, according to the width w
virtual void Layout(int w);
// renders the cell
- virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2) {}
+ virtual void Draw(wxDC& WXUNUSED(dc),
+ int WXUNUSED(x), int WXUNUSED(y),
+ int WXUNUSED(view_y1), int WXUNUSED(view_y2),
+ wxHtmlRenderingInfo& WXUNUSED(info)) {}
- // proceed drawing actions in case the cell is not visible (scrolled out of screen).
- // This is needed to change fonts, colors and so on
- virtual void DrawInvisible(wxDC& dc, int x, int y) {}
+ // proceed drawing actions in case the cell is not visible (scrolled out of
+ // screen). This is needed to change fonts, colors and so on.
+ virtual void DrawInvisible(wxDC& WXUNUSED(dc),
+ int WXUNUSED(x), int WXUNUSED(y),
+ wxHtmlRenderingInfo& WXUNUSED(info)) {}
// This method returns pointer to the FIRST cell for that
// the condition
virtual const wxHtmlCell* Find(int condition, const void* param) const;
// This function is called when mouse button is clicked over the cell.
- // left, middle, right are flags indicating whether the button was or wasn't
- // pressed.
+ //
// Parent is pointer to wxHtmlWindow that generated the event
// HINT: if this handling is not enough for you you should use
- // wxHtmlBinderCell
+ // wxHtmlWidgetCell
virtual void OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event);
- // This method used to adjust pagebreak position. The parameter is
- // variable that contains y-coordinate of page break (= horizontal line that
- // should not be crossed by words, images etc.). If this cell cannot be divided
+ // This method used to adjust pagebreak position. The parameter is variable
+ // that contains y-coordinate of page break (= horizontal line that should
+ // not be crossed by words, images etc.). If this cell cannot be divided
// into two pieces (each one on another page) then it moves the pagebreak
// few pixels up.
//
// Returned value : true if pagebreak was modified, false otherwise
// Usage : while (container->AdjustPagebreak(&p)) {}
- virtual bool AdjustPagebreak(int *pagebreak) const;
+ virtual bool AdjustPagebreak(int *pagebreak,
+ int *known_pagebreaks = NULL,
+ int number_of_pages = 0) const;
// Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
// is true - the cell can be split on two pages
- void SetCanLiveOnPagebreak(bool can) {m_CanLiveOnPagebreak = can;}
-
+ void SetCanLiveOnPagebreak(bool can) { m_CanLiveOnPagebreak = can; }
+
+ // Can the line be broken before this cell?
+ virtual bool IsLinebreakAllowed() const
+ { return !IsFormattingCell(); }
+
+ // Returns true for simple == terminal cells, i.e. not composite ones.
+ // This if for internal usage only and may disappear in future versions!
+ virtual bool IsTerminalCell() const { return true; }
+
+ // Find a cell inside this cell positioned at the given coordinates
+ // (relative to this's positions). Returns NULL if no such cell exists.
+ // The flag can be used to specify whether to look for terminal or
+ // nonterminal cells or both. In either case, returned cell is deepest
+ // cell in cells tree that contains [x,y].
+ virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y,
+ unsigned flags = wxHTML_FIND_EXACT) const;
+
+ // Returns absolute position of the cell on HTML canvas
+ wxPoint GetAbsPos() const;
+
+ // Returns first (last) terminal cell inside this cell. It may return NULL,
+ // but it is rare -- only if there are no terminals in the tree.
+ virtual wxHtmlCell *GetFirstTerminal() const
+ { return wxConstCast(this, wxHtmlCell); }
+ virtual wxHtmlCell *GetLastTerminal() const
+ { return wxConstCast(this, wxHtmlCell); }
+
+ // Returns cell's depth, i.e. how far under the root cell it is
+ // (if it is the root, depth is 0)
+ unsigned GetDepth() const;
+
+ // Returns true if the cell appears before 'cell' in natural order of
+ // cells (= as they are read). If cell A is (grand)parent of cell B,
+ // then both A.IsBefore(B) and B.IsBefore(A) always return true.
+ bool IsBefore(wxHtmlCell *cell) const;
+
+ // Converts the cell into text representation. If sel != NULL then
+ // only part of the cell inside the selection is converted.
+ virtual wxString ConvertToText(wxHtmlSelection *WXUNUSED(sel)) const
+ { return wxEmptyString; }
protected:
wxHtmlCell *m_Next;
// pointer to the next cell
wxHtmlContainerCell *m_Parent;
- // pointer to parent cell
+ // pointer to parent cell
long m_Width, m_Height, m_Descent;
// dimensions of fragment
// m_Descent is used to position text&images..
long m_PosX, m_PosY;
// position where the fragment is drawn
wxHtmlLinkInfo *m_Link;
- // destination address if this fragment is hypertext link, "" otherwise
+ // destination address if this fragment is hypertext link, NULL otherwise
bool m_CanLiveOnPagebreak;
// true if this cell can be placed on pagebreak, false otherwise
+ wxString m_id;
+ // unique identifier of the cell, generated from "id" property of tags
+
+ DECLARE_ABSTRACT_CLASS(wxHtmlCell)
+ DECLARE_NO_COPY_CLASS(wxHtmlCell)
};
-//--------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// Inherited cells:
-//--------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
-//--------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// wxHtmlWordCell
// Single word in input stream.
-//--------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlWordCell : public wxHtmlCell
+class WXDLLIMPEXP_HTML wxHtmlWordCell : public wxHtmlCell
{
public:
wxHtmlWordCell(const wxString& word, wxDC& dc);
- void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
+ void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
+ wxHtmlRenderingInfo& info);
+ wxCursor GetCursor() const;
+ wxString ConvertToText(wxHtmlSelection *sel) const;
+ bool IsLinebreakAllowed() const { return m_allowLinebreak; }
+
+ void SetPreviousWord(wxHtmlWordCell *cell);
protected:
+ void SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const;
+ void Split(wxDC& dc,
+ const wxPoint& selFrom, const wxPoint& selTo,
+ unsigned& pos1, unsigned& pos2) const;
+
wxString m_Word;
-};
+ bool m_allowLinebreak;
+ DECLARE_ABSTRACT_CLASS(wxHtmlWordCell)
+ DECLARE_NO_COPY_CLASS(wxHtmlWordCell)
+};
-//--------------------------------------------------------------------------------
-// wxHtmlContainerCell
-// Container - it contains other cells. Basic of layout algorithm.
-//--------------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlContainerCell : public wxHtmlCell
+// Container contains other cells, thus forming tree structure of rendering
+// elements. Basic code of layout algorithm is contained in this class.
+class WXDLLIMPEXP_HTML wxHtmlContainerCell : public wxHtmlCell
{
public:
wxHtmlContainerCell(wxHtmlContainerCell *parent);
~wxHtmlContainerCell();
virtual void Layout(int w);
- virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
- virtual void DrawInvisible(wxDC& dc, int x, int y);
- virtual bool AdjustPagebreak(int *pagebreak) const;
+ virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
+ wxHtmlRenderingInfo& info);
+ virtual void DrawInvisible(wxDC& dc, int x, int y,
+ wxHtmlRenderingInfo& info);
+ virtual bool AdjustPagebreak(int *pagebreak, int *known_pagebreaks = NULL, int number_of_pages = 0) const;
// insert cell at the end of m_Cells list
void InsertCell(wxHtmlCell *cell);
// sets minimal height of this container.
void SetMinHeight(int h, int align = wxHTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align; m_LastLayout = -1;}
- void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = TRUE; m_BkColour = clr;}
- void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = TRUE; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
+ void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = true; m_BkColour = clr;}
+ // returns background colour (of wxNullColour if none set), so that widgets can
+ // adapt to it:
+ wxColour GetBackgroundColour();
+ void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = true; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
virtual wxHtmlLinkInfo* GetLink(int x = 0, int y = 0) const;
virtual const wxHtmlCell* Find(int condition, const void* param) const;
virtual void OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event);
- // returns pointer to the first cell in container or NULL
- wxHtmlCell* GetFirstCell() const {return m_Cells;}
+ virtual wxHtmlCell* GetFirstChild() const { return m_Cells; }
+#if WXWIN_COMPATIBILITY_2_4
+ wxDEPRECATED( wxHtmlCell* GetFirstCell() const );
+#endif
+
+ // see comment in wxHtmlCell about this method
+ virtual bool IsTerminalCell() const { return false; }
+
+ virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y,
+ unsigned flags = wxHTML_FIND_EXACT) const;
+
+ virtual wxHtmlCell *GetFirstTerminal() const;
+ virtual wxHtmlCell *GetLastTerminal() const;
+
+
+ // Removes indentation on top or bottom of the container (i.e. above or
+ // below first/last terminal cell). For internal use only.
+ void RemoveExtraSpacing(bool top, bool bottom);
+
+ // Returns the maximum possible length of the container.
+ // Call Layout at least once before using GetMaxTotalWidth()
+ virtual int GetMaxTotalWidth() const { return m_MaxTotalWidth; }
+
+protected:
+ void UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
+ wxHtmlCell *cell) const;
+ void UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
+ wxHtmlCell *cell) const;
protected:
int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom;
int m_LastLayout;
// if != -1 then call to Layout may be no-op
// if previous call to Layout has same argument
+ int m_MaxTotalWidth;
+ // Maximum possible length if ignoring line wrap
+
+
+ DECLARE_ABSTRACT_CLASS(wxHtmlContainerCell)
+ DECLARE_NO_COPY_CLASS(wxHtmlContainerCell)
};
+#if WXWIN_COMPATIBILITY_2_4
+inline wxHtmlCell* wxHtmlContainerCell::GetFirstCell() const
+ { return GetFirstChild(); }
+#endif
-//--------------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
// wxHtmlColourCell
// Color changer.
-//--------------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlColourCell : public wxHtmlCell
+class WXDLLIMPEXP_HTML wxHtmlColourCell : public wxHtmlCell
{
public:
wxHtmlColourCell(const wxColour& clr, int flags = wxHTML_CLR_FOREGROUND) : wxHtmlCell() {m_Colour = clr; m_Flags = flags;}
- virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
- virtual void DrawInvisible(wxDC& dc, int x, int y);
+ virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
+ wxHtmlRenderingInfo& info);
+ virtual void DrawInvisible(wxDC& dc, int x, int y,
+ wxHtmlRenderingInfo& info);
protected:
wxColour m_Colour;
unsigned m_Flags;
+
+ DECLARE_ABSTRACT_CLASS(wxHtmlColourCell)
+ DECLARE_NO_COPY_CLASS(wxHtmlColourCell)
};
// Sets actual font used for text rendering
//--------------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlFontCell : public wxHtmlCell
+class WXDLLIMPEXP_HTML wxHtmlFontCell : public wxHtmlCell
{
public:
wxHtmlFontCell(wxFont *font) : wxHtmlCell() { m_Font = (*font); }
- virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
- virtual void DrawInvisible(wxDC& dc, int x, int y);
+ virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
+ wxHtmlRenderingInfo& info);
+ virtual void DrawInvisible(wxDC& dc, int x, int y,
+ wxHtmlRenderingInfo& info);
protected:
wxFont m_Font;
+
+ DECLARE_ABSTRACT_CLASS(wxHtmlFontCell)
+ DECLARE_NO_COPY_CLASS(wxHtmlFontCell)
};
// (buttons, input boxes etc.)
//--------------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlWidgetCell : public wxHtmlCell
+class WXDLLIMPEXP_HTML wxHtmlWidgetCell : public wxHtmlCell
{
public:
// !!! wnd must have correct parent!
// (w is percent of parent's width)
wxHtmlWidgetCell(wxWindow *wnd, int w = 0);
~wxHtmlWidgetCell() { m_Wnd->Destroy(); }
- virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
- virtual void DrawInvisible(wxDC& dc, int x, int y);
+ virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
+ wxHtmlRenderingInfo& info);
+ virtual void DrawInvisible(wxDC& dc, int x, int y,
+ wxHtmlRenderingInfo& info);
virtual void Layout(int w);
protected:
wxWindow* m_Wnd;
int m_WidthFloat;
// width float is used in adjustWidth (it is in percents)
+
+ DECLARE_ABSTRACT_CLASS(wxHtmlWidgetCell)
+ DECLARE_NO_COPY_CLASS(wxHtmlWidgetCell)
};
// Internal data structure. It represents hypertext link
//--------------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlLinkInfo : public wxObject
+class WXDLLIMPEXP_HTML wxHtmlLinkInfo : public wxObject
{
public:
wxHtmlLinkInfo() : wxObject()
+// ----------------------------------------------------------------------------
+// wxHtmlTerminalCellsInterator
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_HTML wxHtmlTerminalCellsInterator
+{
+public:
+ wxHtmlTerminalCellsInterator(const wxHtmlCell *from, const wxHtmlCell *to)
+ : m_to(to), m_pos(from) {}
+
+ operator bool() const { return m_pos != NULL; }
+ const wxHtmlCell* operator++();
+ const wxHtmlCell* operator->() const { return m_pos; }
+ const wxHtmlCell* operator*() const { return m_pos; }
+
+private:
+ const wxHtmlCell *m_to, *m_pos;
+};
+
+
#endif // wxUSE_HTML
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