initial commit

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

libs/wxWidgets-3.3.1/include/wx/html/htmlwin.h

@@ -0,0 +1,658 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/html/htmlwin.h
+// Purpose:     wxHtmlWindow class for parsing & displaying HTML
+// Author:      Vaclav Slavik
+// Copyright:   (c) 1999 Vaclav Slavik
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_HTMLWIN_H_
+#define _WX_HTMLWIN_H_
+
+#include "wx/defs.h"
+#if wxUSE_HTML
+
+#include "wx/window.h"
+#include "wx/scrolwin.h"
+#include "wx/config.h"
+#include "wx/stopwatch.h"
+#include "wx/html/winpars.h"
+#include "wx/html/htmlcell.h"
+#include "wx/filesys.h"
+#include "wx/html/htmlfilt.h"
+#include "wx/filename.h"
+#include "wx/bmpbndl.h"
+
+class wxHtmlProcessor;
+class wxHtmlWinModule;
+class wxHtmlHistoryArray;
+class wxHtmlProcessorList;
+class WXDLLIMPEXP_FWD_HTML wxHtmlWinAutoScrollTimer;
+class WXDLLIMPEXP_FWD_HTML wxHtmlCellEvent;
+class WXDLLIMPEXP_FWD_HTML wxHtmlLinkEvent;
+class WXDLLIMPEXP_FWD_CORE wxStatusBar;
+
+// wxHtmlWindow flags:
+#define wxHW_SCROLLBAR_NEVER    0x0002
+#define wxHW_SCROLLBAR_AUTO     0x0004
+#define wxHW_NO_SELECTION       0x0008
+
+#define wxHW_DEFAULT_STYLE      wxHW_SCROLLBAR_AUTO
+
+/// Enum for wxHtmlWindow::OnOpeningURL and wxHtmlWindowInterface::OnOpeningURL
+enum wxHtmlOpeningStatus
+{
+    /// Open the requested URL
+    wxHTML_OPEN,
+    /// Do not open the URL
+    wxHTML_BLOCK,
+    /// Redirect to another URL (returned from OnOpeningURL)
+    wxHTML_REDIRECT
+};
+
+/**
+    Abstract interface to a HTML rendering window (such as wxHtmlWindow or
+    wxHtmlListBox) that is passed to wxHtmlWinParser. It encapsulates all
+    communication from the parser to the window.
+ */
+class WXDLLIMPEXP_HTML wxHtmlWindowInterface
+{
+public:
+    /// Ctor
+    wxHtmlWindowInterface() = default;
+    virtual ~wxHtmlWindowInterface() = default;
+
+    /**
+        Called by the parser to set window's title to given text.
+     */
+    virtual void SetHTMLWindowTitle(const wxString& title) = 0;
+
+    /**
+        Called when a link is clicked.
+
+        @param link information about the clicked link
+     */
+    virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo& link) = 0;
+
+    /**
+        Called when the parser needs to open another URL (e.g. an image).
+
+        @param type     Type of the URL request (e.g. image)
+        @param url      URL the parser wants to open
+        @param redirect If the return value is wxHTML_REDIRECT, then the
+                        URL to redirect to will be stored in this variable
+                        (the pointer must never be null)
+
+        @return indicator of how to treat the request
+     */
+    virtual wxHtmlOpeningStatus OnHTMLOpeningURL(wxHtmlURLType type,
+                                                 const wxString& url,
+                                                 wxString *redirect) const = 0;
+
+    /**
+        Converts coordinates @a pos relative to given @a cell to
+        physical coordinates in the window.
+     */
+    virtual wxPoint HTMLCoordsToWindow(wxHtmlCell *cell,
+                                       const wxPoint& pos) const = 0;
+
+    /// Returns the window used for rendering (may be null).
+    virtual wxWindow* GetHTMLWindow() = 0;
+
+    /// Returns background colour to use by default.
+    virtual wxColour GetHTMLBackgroundColour() const = 0;
+
+    /// Sets window's background to colour @a clr.
+    virtual void SetHTMLBackgroundColour(const wxColour& clr) = 0;
+
+    /// Sets window's background to given bitmap.
+    virtual void SetHTMLBackgroundImage(const wxBitmapBundle& bmpBg) = 0;
+
+    /// Sets status bar text.
+    virtual void SetHTMLStatusText(const wxString& text) = 0;
+
+    /// Type of mouse cursor
+    enum HTMLCursor
+    {
+        /// Standard mouse cursor (typically an arrow)
+        HTMLCursor_Default,
+        /// Cursor shown over links
+        HTMLCursor_Link,
+        /// Cursor shown over selectable text
+        HTMLCursor_Text
+    };
+
+    /**
+        Returns mouse cursor of given @a type.
+     */
+    virtual wxCursor GetHTMLCursor(HTMLCursor type) const = 0;
+};
+
+/**
+    Helper class that implements part of mouse handling for wxHtmlWindow and
+    wxHtmlListBox. Cursor changes and clicking on links are handled, text
+    selection is not.
+ */
+class WXDLLIMPEXP_HTML wxHtmlWindowMouseHelper
+{
+protected:
+    /**
+        Ctor.
+
+        @param iface Interface to the owner window.
+     */
+    wxHtmlWindowMouseHelper(wxHtmlWindowInterface *iface);
+
+    /**
+        Virtual dtor.
+
+        It is not really needed in this case, but at least it prevents gcc from
+        complaining about its absence.
+     */
+    virtual ~wxHtmlWindowMouseHelper() = default;
+
+    /// Returns true if the mouse moved since the last call to HandleIdle
+    bool DidMouseMove() const { return m_tmpMouseMoved; }
+
+    /// Call this from EVT_MOTION event handler
+    void HandleMouseMoved();
+
+    /**
+        Call this from EVT_LEFT_UP handler (or, alternatively, EVT_LEFT_DOWN).
+
+        @param rootCell HTML cell inside which the click occurred. This doesn't
+                        have to be the leaf cell, it can be e.g. toplevel
+                        container, but the mouse must be inside the container's
+                        area, otherwise the event would be ignored.
+        @param pos      Mouse position in coordinates relative to @a cell
+        @param event    The event that triggered the call
+     */
+    bool HandleMouseClick(wxHtmlCell *rootCell,
+                          const wxPoint& pos, const wxMouseEvent& event);
+
+    /**
+        Call this from OnInternalIdle of the HTML displaying window. Handles
+        mouse movements and must be used together with HandleMouseMoved.
+
+        @param rootCell HTML cell inside which the click occurred. This doesn't
+                        have to be the leaf cell, it can be e.g. toplevel
+                        container, but the mouse must be inside the container's
+                        area, otherwise the event would be ignored.
+        @param pos      Current mouse position in coordinates relative to
+                        @a cell
+     */
+    void HandleIdle(wxHtmlCell *rootCell, const wxPoint& pos);
+
+    /**
+        Called by HandleIdle when the mouse hovers over a cell. Default
+        behaviour is to do nothing.
+
+        @param cell   the cell the mouse is over
+        @param x, y   coordinates of mouse relative to the cell
+     */
+    virtual void OnCellMouseHover(wxHtmlCell *cell, wxCoord x, wxCoord y);
+
+    /**
+        Called by HandleMouseClick when the user clicks on a cell.
+        Default behaviour is to call wxHtmlWindowInterface::OnLinkClicked()
+        if this cell corresponds to a hypertext link.
+
+        @param cell   the cell the mouse is over
+        @param x, y   coordinates of mouse relative to the cell
+        @param event    The event that triggered the call
+
+
+        @return true if a link was clicked, false otherwise.
+     */
+    virtual bool OnCellClicked(wxHtmlCell *cell,
+                               wxCoord x, wxCoord y,
+                               const wxMouseEvent& event);
+
+protected:
+    // this flag indicates if the mouse moved (used by HandleIdle)
+    bool m_tmpMouseMoved;
+    // contains last link name
+    wxHtmlLinkInfo *m_tmpLastLink;
+    // contains the last (terminal) cell which contained the mouse
+    wxHtmlCell *m_tmpLastCell;
+
+private:
+    wxHtmlWindowInterface *m_interface;
+};
+
+// ----------------------------------------------------------------------------
+// wxHtmlWindow
+//                  (This is probably the only class you will directly use.)
+//                  Purpose of this class is to display HTML page (either local
+//                  file or downloaded via HTTP protocol) in a window. Width of
+//                  window is constant - given in constructor - virtual height
+//                  is changed dynamically depending on page size.  Once the
+//                  window is created you can set its content by calling
+//                  SetPage(text) or LoadPage(filename).
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_HTML wxHtmlWindow : public wxScrolledWindow,
+                                      public wxHtmlWindowInterface,
+                                      public wxHtmlWindowMouseHelper
+{
+    wxDECLARE_DYNAMIC_CLASS(wxHtmlWindow);
+    friend class wxHtmlWinModule;
+
+public:
+    wxHtmlWindow() : wxHtmlWindowMouseHelper(this) { Init(); }
+    wxHtmlWindow(wxWindow *parent, wxWindowID id = wxID_ANY,
+                 const wxPoint& pos = wxDefaultPosition,
+                 const wxSize& size = wxDefaultSize,
+                 long style = wxHW_DEFAULT_STYLE,
+                 const wxString& name = wxT("htmlWindow"))
+        : wxHtmlWindowMouseHelper(this)
+    {
+        Init();
+        Create(parent, id, pos, size, style, name);
+    }
+    virtual ~wxHtmlWindow();
+
+    bool Create(wxWindow *parent, wxWindowID id = wxID_ANY,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxHW_SCROLLBAR_AUTO,
+                const wxString& name = wxT("htmlWindow"));
+
+    // Set HTML page and display it. !! source is HTML document itself,
+    // it is NOT address/filename of HTML document. If you want to
+    // specify document location, use LoadPage() instead
+    // Return value : false if an error occurred, true otherwise
+    virtual bool SetPage(const wxString& source);
+
+    // Append to current page
+    bool AppendToPage(const wxString& source);
+
+    // Load HTML page from given location. Location can be either
+    // a) /usr/wxGTK2/docs/html/wx.htm
+    // b) http://www.somewhere.uk/document.htm
+    // c) ftp://ftp.somesite.cz/pub/something.htm
+    // In case there is no prefix (http:,ftp:), the method
+    // will try to find it itself (1. local file, then http or ftp)
+    // After the page is loaded, the method calls SetPage() to display it.
+    // Note : you can also use path relative to previously loaded page
+    // Return value : same as SetPage
+    virtual bool LoadPage(const wxString& location);
+
+    // Loads HTML page from file
+    bool LoadFile(const wxFileName& filename);
+
+    // Returns full location of opened page
+    wxString GetOpenedPage() const {return m_OpenedPage;}
+    // Returns anchor within opened page
+    wxString GetOpenedAnchor() const {return m_OpenedAnchor;}
+    // Returns <TITLE> of opened page or empty string otherwise
+    wxString GetOpenedPageTitle() const {return m_OpenedPageTitle;}
+
+    // Sets frame in which page title will  be displayed. Format is format of
+    // frame title, e.g. "HtmlHelp : %s". It must contain exactly one %s
+    void SetRelatedFrame(wxFrame* frame, const wxString& format);
+    wxFrame* GetRelatedFrame() const {return m_RelatedFrame;}
+
+#if wxUSE_STATUSBAR
+    // After(!) calling SetRelatedFrame, this sets statusbar slot where messages
+    // will be displayed. Default is -1 = no messages.
+    void SetRelatedStatusBar(int index);
+    void SetRelatedStatusBar(wxStatusBar*, int index = 0);
+#endif // wxUSE_STATUSBAR
+
+    // Sets fonts to be used when displaying HTML page.
+    void SetFonts(const wxString& normal_face, const wxString& fixed_face,
+                  const int *sizes = nullptr);
+
+    // Sets font sizes to be relative to the given size or the system
+    // default size; use either specified or default font
+    void SetStandardFonts(int size = -1,
+                          const wxString& normal_face = wxEmptyString,
+                          const wxString& fixed_face = wxEmptyString);
+
+    // Sets space between text and window borders.
+    void SetBorders(int b) {m_Borders = b;}
+
+    // Sets the bitmap to use for background (currnetly it will be tiled,
+    // when/if we have CSS support we could add other possibilities...)
+    void SetBackgroundImage(const wxBitmapBundle& bmpBg) { m_bmpBg = bmpBg; }
+
+#if wxUSE_CONFIG
+    // Saves custom settings into cfg config. it will use the path 'path'
+    // if given, otherwise it will save info into currently selected path.
+    // saved values : things set by SetFonts, SetBorders.
+    virtual void ReadCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
+    // ...
+    virtual void WriteCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
+#endif // wxUSE_CONFIG
+
+    // Goes to previous/next page (in browsing history)
+    // Returns true if successful, false otherwise
+    bool HistoryBack();
+    bool HistoryForward();
+    bool HistoryCanBack();
+    bool HistoryCanForward();
+    // Resets history
+    void HistoryClear();
+
+    // Returns pointer to conteiners/cells structure.
+    // It should be used ONLY when printing
+    wxHtmlContainerCell* GetInternalRepresentation() const {return m_Cell;}
+
+    // Adds input filter
+    static void AddFilter(wxHtmlFilter *filter);
+
+    // Returns a pointer to the parser.
+    wxHtmlWinParser *GetParser() const { return m_Parser; }
+
+    // Adds HTML processor to this instance of wxHtmlWindow:
+    void AddProcessor(wxHtmlProcessor *processor);
+    // Adds HTML processor to wxHtmlWindow class as whole:
+    static void AddGlobalProcessor(wxHtmlProcessor *processor);
+
+
+    // -- Callbacks --
+
+    // Sets the title of the window
+    // (depending on the information passed to SetRelatedFrame() method)
+    virtual void OnSetTitle(const wxString& title);
+
+    // Called when user clicked on hypertext link. Default behaviour is to
+    // call LoadPage(loc)
+    virtual void OnLinkClicked(const wxHtmlLinkInfo& link);
+
+    // Called when wxHtmlWindow wants to fetch data from an URL (e.g. when
+    // loading a page or loading an image). The data are downloaded if and only if
+    // OnOpeningURL returns true. If OnOpeningURL returns wxHTML_REDIRECT,
+    // it must set *redirect to the new URL
+    virtual wxHtmlOpeningStatus OnOpeningURL(wxHtmlURLType WXUNUSED(type),
+                                             const wxString& WXUNUSED(url),
+                                             wxString *WXUNUSED(redirect)) const
+        { return wxHTML_OPEN; }
+
+#if wxUSE_CLIPBOARD
+    // Helper functions to select parts of page:
+    void SelectWord(const wxPoint& pos);
+    void SelectLine(const wxPoint& pos);
+    void SelectAll();
+
+    // Convert selection to text:
+    wxString SelectionToText() { return DoSelectionToText(m_selection); }
+
+    // Converts current page to text:
+    wxString ToText();
+#endif // wxUSE_CLIPBOARD
+
+    virtual void OnInternalIdle() override;
+
+    /// Returns standard HTML cursor as used by wxHtmlWindow
+    static wxCursor GetDefaultHTMLCursor(HTMLCursor type,
+                                         const wxWindow* window = nullptr);
+    static void SetDefaultHTMLCursor(HTMLCursor type, const wxCursorBundle& cursor);
+
+protected:
+    void Init();
+
+    // Scrolls to anchor of this name. (Anchor is #news
+    // or #features etc. it is part of address sometimes:
+    // http://www.ms.mff.cuni.cz/~vsla8348/wxhtml/index.html#news)
+    // Return value : true if anchor exists, false otherwise
+    bool ScrollToAnchor(const wxString& anchor);
+
+    // Prepares layout (= fill m_PosX, m_PosY for fragments) based on
+    // actual size of window. This method also setup scrollbars
+    void CreateLayout();
+
+    void OnPaint(wxPaintEvent& event);
+    void OnEraseBackground(wxEraseEvent& event);
+    void OnSize(wxSizeEvent& event);
+    void OnDPIChanged(wxDPIChangedEvent& event);
+    void OnMouseMove(wxMouseEvent& event);
+    void OnMouseDown(wxMouseEvent& event);
+    void OnMouseUp(wxMouseEvent& event);
+    void OnFocusEvent(wxFocusEvent& event);
+#if wxUSE_CLIPBOARD
+    void OnKeyUp(wxKeyEvent& event);
+    void OnDoubleClick(wxMouseEvent& event);
+    void OnCopy(wxCommandEvent& event);
+    void OnClipboardEvent(wxClipboardTextEvent& event);
+    void OnMouseEnter(wxMouseEvent& event);
+    void OnMouseLeave(wxMouseEvent& event);
+    void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
+#endif // wxUSE_CLIPBOARD
+
+    // Returns new filter (will be stored into m_DefaultFilter variable)
+    virtual wxHtmlFilter *GetDefaultFilter() {return new wxHtmlFilterPlainText;}
+
+    // cleans static variables
+    static void CleanUpStatics();
+
+    // Returns true if text selection is enabled (wxClipboard must be available
+    // and wxHW_NO_SELECTION not used)
+    bool IsSelectionEnabled() const;
+
+    enum ClipboardType
+    {
+        Primary,
+        Secondary
+    };
+
+    // Copies selection to clipboard if the clipboard support is available
+    //
+    // returns true if anything was copied to clipboard, false otherwise
+    bool CopySelection(ClipboardType t = Secondary);
+
+#if wxUSE_CLIPBOARD
+    // Automatic scrolling during selection:
+    void StopAutoScrolling();
+#endif // wxUSE_CLIPBOARD
+
+    wxString DoSelectionToText(wxHtmlSelection *sel);
+
+public:
+    // wxHtmlWindowInterface methods:
+    virtual void SetHTMLWindowTitle(const wxString& title) override;
+    virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo& link) override;
+    virtual wxHtmlOpeningStatus OnHTMLOpeningURL(wxHtmlURLType type,
+                                                 const wxString& url,
+                                                 wxString *redirect) const override;
+    virtual wxPoint HTMLCoordsToWindow(wxHtmlCell *cell,
+                                       const wxPoint& pos) const override;
+    virtual wxWindow* GetHTMLWindow() override;
+    virtual wxColour GetHTMLBackgroundColour() const override;
+    virtual void SetHTMLBackgroundColour(const wxColour& clr) override;
+    virtual void SetHTMLBackgroundImage(const wxBitmapBundle& bmpBg) override;
+    virtual void SetHTMLStatusText(const wxString& text) override;
+    virtual wxCursor GetHTMLCursor(HTMLCursor type) const override;
+
+    // implementation of SetPage()
+    bool DoSetPage(const wxString& source);
+
+protected:
+    // This is pointer to the first cell in parsed data.  (Note: the first cell
+    // is usually top one = all other cells are sub-cells of this one)
+    wxHtmlContainerCell *m_Cell;
+    // parser which is used to parse HTML input.
+    // Each wxHtmlWindow has its own parser because sharing one global
+    // parser would be problematic (because of reentrancy)
+    wxHtmlWinParser *m_Parser;
+    // contains name of actually opened page or empty string if no page opened
+    wxString m_OpenedPage;
+    // contains name of current anchor within m_OpenedPage
+    wxString m_OpenedAnchor;
+    // contains title of actually opened page or empty string if no <TITLE> tag
+    wxString m_OpenedPageTitle;
+    // class for opening files (file system)
+    wxFileSystem* m_FS;
+
+    // frame in which page title should be displayed & number of its statusbar
+    // reserved for usage with this html window
+    wxFrame *m_RelatedFrame;
+#if wxUSE_STATUSBAR
+    int m_RelatedStatusBarIndex;
+    wxStatusBar* m_RelatedStatusBar;
+#endif // wxUSE_STATUSBAR
+    wxString m_TitleFormat;
+
+    // borders (free space between text and window borders)
+    // defaults to 10 pixels.
+    int m_Borders;
+
+    // current text selection or nullptr
+    wxHtmlSelection *m_selection;
+
+    // true if the user is dragging mouse to select text
+    bool m_makingSelection;
+
+#if wxUSE_CLIPBOARD
+    // time of the last double-click event, used to detect triple clicks
+    // (triple clicks are used to select whole line):
+    wxMilliClock_t m_lastDoubleClick;
+
+    // helper class to automatically scroll the window if the user is selecting
+    // text and the mouse leaves wxHtmlWindow:
+    wxHtmlWinAutoScrollTimer *m_timerAutoScroll;
+#endif // wxUSE_CLIPBOARD
+
+private:
+    // erase the window background using m_bmpBg or just solid colour if we
+    // don't have any background image
+    void DoEraseBackground(wxDC& dc);
+
+    // window content for double buffered rendering, may be invalid until it is
+    // really initialized in OnPaint()
+    wxBitmap m_backBuffer;
+
+    // background image, may be invalid
+    wxBitmapBundle m_bmpBg;
+
+    // variables used when user is selecting text
+    wxPoint     m_tmpSelFromPos;
+    wxHtmlCell *m_tmpSelFromCell;
+
+    // if >0 contents of the window is not redrawn
+    // (in order to avoid ugly blinking)
+    int m_tmpCanDrawLocks;
+
+    // list of HTML filters
+    static wxList m_Filters;
+    // this filter is used when no filter is able to read some file
+    static wxHtmlFilter *m_DefaultFilter;
+
+    // html processors array:
+    wxHtmlProcessorList *m_Processors;
+    static wxHtmlProcessorList *m_GlobalProcessors;
+
+    // browser history
+    wxHtmlHistoryArray *m_History;
+    int m_HistoryPos;
+    // if this FLAG is false, items are not added to history
+    bool m_HistoryOn;
+
+    // Flag used to communicate between OnPaint() and OnEraseBackground(), see
+    // the comments near its use.
+    bool m_isBgReallyErased;
+
+    wxDECLARE_EVENT_TABLE();
+    wxDECLARE_NO_COPY_CLASS(wxHtmlWindow);
+};
+
+class WXDLLIMPEXP_FWD_HTML wxHtmlCellEvent;
+
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_HTML, wxEVT_HTML_CELL_CLICKED, wxHtmlCellEvent );
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_HTML, wxEVT_HTML_CELL_HOVER, wxHtmlCellEvent );
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_HTML, wxEVT_HTML_LINK_CLICKED, wxHtmlLinkEvent );
+
+
+/*!
+ * Html cell window event
+ */
+
+class WXDLLIMPEXP_HTML wxHtmlCellEvent : public wxCommandEvent
+{
+public:
+    wxHtmlCellEvent() = default;
+    wxHtmlCellEvent(wxEventType commandType, int id,
+                    wxHtmlCell *cell, const wxPoint &pt,
+                    const wxMouseEvent &ev)
+        : wxCommandEvent(commandType, id)
+        , m_mouseEvent(ev)
+        , m_pt(pt)
+    {
+        m_cell = cell;
+        m_bLinkWasClicked = false;
+    }
+
+    wxHtmlCell* GetCell() const { return m_cell; }
+    wxPoint GetPoint() const { return m_pt; }
+    wxMouseEvent GetMouseEvent() const { return m_mouseEvent; }
+
+    void SetLinkClicked(bool linkclicked) { m_bLinkWasClicked=linkclicked; }
+    bool GetLinkClicked() const { return m_bLinkWasClicked; }
+
+    // default copy ctor, assignment operator and dtor are ok
+    wxNODISCARD virtual wxEvent *Clone() const override { return new wxHtmlCellEvent(*this); }
+
+private:
+    wxHtmlCell *m_cell;
+    wxMouseEvent m_mouseEvent;
+    wxPoint m_pt;
+
+    bool m_bLinkWasClicked;
+
+    wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN_DEF_COPY(wxHtmlCellEvent);
+};
+
+
+
+/*!
+ * Html link event
+ */
+
+class WXDLLIMPEXP_HTML wxHtmlLinkEvent : public wxCommandEvent
+{
+public:
+    wxHtmlLinkEvent() = default;
+    wxHtmlLinkEvent(int id, const wxHtmlLinkInfo &linkinfo)
+        : wxCommandEvent(wxEVT_HTML_LINK_CLICKED, id)
+        , m_linkInfo(linkinfo)
+    {
+    }
+
+    const wxHtmlLinkInfo &GetLinkInfo() const { return m_linkInfo; }
+
+    // default copy ctor, assignment operator and dtor are ok
+    wxNODISCARD virtual wxEvent *Clone() const override { return new wxHtmlLinkEvent(*this); }
+
+private:
+    wxHtmlLinkInfo m_linkInfo;
+
+    wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN_DEF_COPY(wxHtmlLinkEvent);
+};
+
+
+typedef void (wxEvtHandler::*wxHtmlCellEventFunction)(wxHtmlCellEvent&);
+typedef void (wxEvtHandler::*wxHtmlLinkEventFunction)(wxHtmlLinkEvent&);
+
+#define wxHtmlCellEventHandler(func) \
+    wxEVENT_HANDLER_CAST(wxHtmlCellEventFunction, func)
+#define wxHtmlLinkEventHandler(func) \
+    wxEVENT_HANDLER_CAST(wxHtmlLinkEventFunction, func)
+
+#define EVT_HTML_CELL_CLICKED(id, fn) \
+    wx__DECLARE_EVT1(wxEVT_HTML_CELL_CLICKED, id, wxHtmlCellEventHandler(fn))
+#define EVT_HTML_CELL_HOVER(id, fn) \
+    wx__DECLARE_EVT1(wxEVT_HTML_CELL_HOVER, id, wxHtmlCellEventHandler(fn))
+#define EVT_HTML_LINK_CLICKED(id, fn) \
+    wx__DECLARE_EVT1(wxEVT_HTML_LINK_CLICKED, id, wxHtmlLinkEventHandler(fn))
+
+
+// old wxEVT_COMMAND_* constants
+#define wxEVT_COMMAND_HTML_CELL_CLICKED   wxEVT_HTML_CELL_CLICKED
+#define wxEVT_COMMAND_HTML_CELL_HOVER     wxEVT_HTML_CELL_HOVER
+#define wxEVT_COMMAND_HTML_LINK_CLICKED   wxEVT_HTML_LINK_CLICKED
+
+#endif // wxUSE_HTML
+
+#endif // _WX_HTMLWIN_H_
+