///////////////////////////////////////////////////////////////////////////// // Name: htmlcell.h // Purpose: wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser // as a basic visual element of HTML page // Author: Vaclav Slavik // RCS-ID: $Id$ // Copyright: (c) 1999-2003 Vaclav Slavik // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_HTMLCELL_H_ #define _WX_HTMLCELL_H_ #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma interface "htmlcell.h" #endif #include "wx/defs.h" #if wxUSE_HTML #include "wx/html/htmltag.h" #include "wx/html/htmldefs.h" #include "wx/window.h" 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. // --------------------------------------------------------------------------- class WXDLLIMPEXP_HTML wxHtmlCell : public wxObject { public: wxHtmlCell(); virtual ~wxHtmlCell(); void SetParent(wxHtmlContainerCell *p) {m_Parent = p;} wxHtmlContainerCell *GetParent() const {return m_Parent;} 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;} // 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; } // 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 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 virtual void Layout(int w); // renders the cell 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& WXUNUSED(dc), int WXUNUSED(x), int WXUNUSED(y), wxHtmlRenderingInfo& WXUNUSED(info)) {} // This method returns pointer to the FIRST cell for that // the condition // is true. It first checks if the condition is true for this // cell and then calls m_Next->Find(). (Note: it checks // all subcells if the cell is container) // Condition is unique condition identifier (see htmldefs.h) // (user-defined condition IDs should start from 10000) // and param is optional parameter // Example : m_Cell->Find(wxHTML_COND_ISANCHOR, "news"); // returns pointer to anchor news virtual const wxHtmlCell* Find(int condition, const void* param) const; // This function is called when mouse button is clicked over the cell. // // Parent is pointer to wxHtmlWindow that generated the event // HINT: if this handling is not enough for you you should use // 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 // 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, 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; } // 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 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, 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 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, 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) }; // 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, 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 horizontal/vertical alignment void SetAlignHor(int al) {m_AlignHor = al; m_LastLayout = -1;} int GetAlignHor() const {return m_AlignHor;} void SetAlignVer(int al) {m_AlignVer = al; m_LastLayout = -1;} int GetAlignVer() const {return m_AlignVer;} // sets left-border indentation. units is one of wxHTML_UNITS_* constants // what is combination of wxHTML_INDENT_* void SetIndent(int i, int what, int units = wxHTML_UNITS_PIXELS); // returns the indentation. ind is one of wxHTML_INDENT_* constants int GetIndent(int ind) const; // returns type of value returned by GetIndent(ind) int GetIndentUnits(int ind) const; // sets alignment info based on given tag's params void SetAlign(const wxHtmlTag& tag); // sets floating width adjustment // (examples : 32 percent of parent container, // -15 pixels percent (this means 100 % - 15 pixels) void SetWidthFloat(int w, int units) {m_WidthFloat = w; m_WidthFloatUnits = units; m_LastLayout = -1;} void SetWidthFloat(const wxHtmlTag& tag, double pixel_scale = 1.0); // 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;} // 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); 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; // indentation of subcells. There is always m_Indent pixels // big space between given border of the container and the subcells // it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels int m_MinHeight, m_MinHeightAlign; // minimal height. wxHtmlCell *m_Cells, *m_LastCell; // internal cells, m_Cells points to the first of them, m_LastCell to the last one. // (LastCell is needed only to speed-up InsertCell) int m_AlignHor, m_AlignVer; // alignment horizontal and vertical (left, center, right) int m_WidthFloat, m_WidthFloatUnits; // width float is used in adjustWidth bool m_UseBkColour; wxColour m_BkColour; // background color of this container bool m_UseBorder; wxColour m_BorderColour1, m_BorderColour2; // borders color of this container 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 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, 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) }; //-------------------------------------------------------------------------------- // wxHtmlFontCell // Sets actual font used for text rendering //-------------------------------------------------------------------------------- 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, 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) }; //-------------------------------------------------------------------------------- // wxHtmlwidgetCell // This cell is connected with wxWindow object // You can use it to insert windows into HTML page // (buttons, input boxes etc.) //-------------------------------------------------------------------------------- class WXDLLIMPEXP_HTML wxHtmlWidgetCell : public wxHtmlCell { public: // !!! wnd must have correct parent! // if w != 0 then the m_Wnd has 'floating' width - it adjust // it's width according to parent container's width // (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, 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) }; //-------------------------------------------------------------------------------- // wxHtmlLinkInfo // Internal data structure. It represents hypertext link //-------------------------------------------------------------------------------- class WXDLLIMPEXP_HTML wxHtmlLinkInfo : public wxObject { public: wxHtmlLinkInfo() : wxObject() { m_Href = m_Target = wxEmptyString; m_Event = NULL, m_Cell = NULL; } wxHtmlLinkInfo(const wxString& href, const wxString& target = wxEmptyString) : wxObject() { m_Href = href; m_Target = target; m_Event = NULL, m_Cell = NULL; } wxHtmlLinkInfo(const wxHtmlLinkInfo& l) : wxObject() { m_Href = l.m_Href, m_Target = l.m_Target, m_Event = l.m_Event; m_Cell = l.m_Cell; } wxHtmlLinkInfo& operator=(const wxHtmlLinkInfo& l) { m_Href = l.m_Href, m_Target = l.m_Target, m_Event = l.m_Event; m_Cell = l.m_Cell; return *this; } void SetEvent(const wxMouseEvent *e) { m_Event = e; } void SetHtmlCell(const wxHtmlCell *e) { m_Cell = e; } wxString GetHref() const { return m_Href; } wxString GetTarget() const { return m_Target; } const wxMouseEvent* GetEvent() const { return m_Event; } const wxHtmlCell* GetHtmlCell() const { return m_Cell; } private: wxString m_Href, m_Target; const wxMouseEvent *m_Event; const wxHtmlCell *m_Cell; }; // ---------------------------------------------------------------------------- // 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 #endif // _WX_HTMLCELL_H_