htmlwin.cpp

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void wxHtmlWindow::OnMouseMove(wxMouseEvent& WXUNUSED(event))
{
    m_tmpMouseMoved = true;
}

void wxHtmlWindow::OnMouseDown(wxMouseEvent& event)
{
#if wxUSE_CLIPBOARD
    if ( event.LeftDown() && IsSelectionEnabled() )
    {
        const long TRIPLECLICK_LEN = 200; // 0.2 sec after doubleclick
        if ( wxGetLocalTimeMillis() - m_lastDoubleClick <= TRIPLECLICK_LEN )
        {
            SelectLine(CalcUnscrolledPosition(event.GetPosition()));

            (void) CopySelection();
        }
        else
        {
            m_makingSelection = true;

            if ( m_selection )
            {
                wxDELETE(m_selection);
                Refresh();
            }
            m_tmpSelFromPos = CalcUnscrolledPosition(event.GetPosition());
            m_tmpSelFromCell = NULL;

            CaptureMouse();
        }
    }
#else
    wxUnusedVar(event);
#endif // wxUSE_CLIPBOARD
}

void wxHtmlWindow::OnMouseUp(wxMouseEvent& event)
{
#if wxUSE_CLIPBOARD
    if ( m_makingSelection )
    {
        ReleaseMouse();
        m_makingSelection = false;

        // did the user move the mouse far enough from starting point?
        if ( CopySelection(Primary) )
        {
            // we don't want mouse up event that ended selecting to be
            // handled as mouse click and e.g. follow hyperlink:
            return;
        }
    }
#endif // wxUSE_CLIPBOARD

    SetFocus();
    if ( m_Cell )
    {
        wxPoint pos = CalcUnscrolledPosition(event.GetPosition());
        wxHtmlCell *cell = m_Cell->FindCellByPos(pos.x, pos.y);

        // check is needed because FindCellByPos returns terminal cell and
        // containers may have empty borders -- in this case NULL will be
        // returned
        if ( cell )
            OnCellClicked(cell, pos.x, pos.y, event);
    }
}



void wxHtmlWindow::OnInternalIdle()
{
    wxWindow::OnInternalIdle();

    if (m_tmpMouseMoved && (m_Cell != NULL))
    {
#ifdef DEBUG_HTML_SELECTION
        Refresh();
#endif
        int xc, yc, x, y;
        wxGetMousePosition(&xc, &yc);
        ScreenToClient(&xc, &yc);
        CalcUnscrolledPosition(xc, yc, &x, &y);

        wxHtmlCell *cell = m_Cell->FindCellByPos(x, y);

        // handle selection update:
        if ( m_makingSelection )
        {
            if ( !m_tmpSelFromCell )
                m_tmpSelFromCell = m_Cell->FindCellByPos(
                                         m_tmpSelFromPos.x,m_tmpSelFromPos.y);

            // NB: a trick - we adjust selFromPos to be upper left or bottom
            //     right corner of the first cell of the selection depending
            //     on whether the mouse is moving to the right or to the left.
            //     This gives us more "natural" behaviour when selecting
            //     a line (specifically, first cell of the next line is not
            //     included if you drag selection from left to right over
            //     entire line):
            wxPoint dirFromPos;
            if ( !m_tmpSelFromCell )
            {
                dirFromPos = m_tmpSelFromPos;
            }
            else
            {
                dirFromPos = m_tmpSelFromCell->GetAbsPos();
                if ( x < m_tmpSelFromPos.x )
                {
                    dirFromPos.x += m_tmpSelFromCell->GetWidth();
                    dirFromPos.y += m_tmpSelFromCell->GetHeight();
                }
            }
            bool goingDown = dirFromPos.y < y ||
                             (dirFromPos.y == y && dirFromPos.x < x);

            // determine selection span:
            if ( /*still*/ !m_tmpSelFromCell )
            {
                if (goingDown)
                {
                    m_tmpSelFromCell = m_Cell->FindCellByPos(
                                         m_tmpSelFromPos.x,m_tmpSelFromPos.y,
                                         wxHTML_FIND_NEAREST_AFTER);
                    if (!m_tmpSelFromCell)
                        m_tmpSelFromCell = m_Cell->GetFirstTerminal();
                }
                else
                {
                    m_tmpSelFromCell = m_Cell->FindCellByPos(
                                         m_tmpSelFromPos.x,m_tmpSelFromPos.y,
                                         wxHTML_FIND_NEAREST_BEFORE);
                    if (!m_tmpSelFromCell)
                        m_tmpSelFromCell = m_Cell->GetLastTerminal();
                }
            }

            wxHtmlCell *selcell = cell;
            if (!selcell)
            {
                if (goingDown)
                {
                    selcell = m_Cell->FindCellByPos(x, y,
                                                 wxHTML_FIND_NEAREST_BEFORE);
                    if (!selcell)
                        selcell = m_Cell->GetLastTerminal();
                }
                else
                {
                    selcell = m_Cell->FindCellByPos(x, y,
                                                 wxHTML_FIND_NEAREST_AFTER);
                    if (!selcell)
                        selcell = m_Cell->GetFirstTerminal();
                }
            }

            // NB: it may *rarely* happen that the code above didn't find one
            //     of the cells, e.g. if wxHtmlWindow doesn't contain any
            //     visible cells.
            if ( selcell && m_tmpSelFromCell )
            {
                if ( !m_selection )
                {
                    // start selecting only if mouse movement was big enough
                    // (otherwise it was meant as mouse click, not selection):
                    const int PRECISION = 2;
                    wxPoint diff = m_tmpSelFromPos - wxPoint(x,y);
                    if (abs(diff.x) > PRECISION || abs(diff.y) > PRECISION)
                    {
                        m_selection = new wxHtmlSelection();
                    }
                }
                if ( m_selection )
                {
                    if ( m_tmpSelFromCell->IsBefore(selcell) )
                    {
                        m_selection->Set(m_tmpSelFromPos, m_tmpSelFromCell,
                                         wxPoint(x,y), selcell);                                    }
                    else
                    {
                        m_selection->Set(wxPoint(x,y), selcell,
                                         m_tmpSelFromPos, m_tmpSelFromCell);
                    }
                    m_selection->ClearPrivPos();
                    Refresh();
                }
            }
        }

        // handle cursor and status bar text changes:
        if ( cell != m_tmpLastCell )
        {
            wxHtmlLinkInfo *lnk = cell ? cell->GetLink(x, y) : NULL;
            wxCursor cur;
            if (cell)
                cur = cell->GetCursor();
            else
                cur = *wxSTANDARD_CURSOR;
            SetCursor(cur);

            if (lnk != m_tmpLastLink)
            {
#if wxUSE_STATUSBAR
                if (lnk == NULL)
                {
                    if (m_RelatedStatusBar != -1)
                        m_RelatedFrame->SetStatusText(wxEmptyString,
                                                      m_RelatedStatusBar);
                }
                else
                {
                    if (m_RelatedStatusBar != -1)
                        m_RelatedFrame->SetStatusText(lnk->GetHref(),
                                                      m_RelatedStatusBar);
                }
#endif // wxUSE_STATUSBAR
                m_tmpLastLink = lnk;
            }

            m_tmpLastCell = cell;
        }
        else // mouse moved but stayed in the same cell
        {
            if ( cell )
                OnCellMouseHover(cell, x, y);
        }

        m_tmpMouseMoved = false;
    }
}

#if wxUSE_CLIPBOARD
void wxHtmlWindow::StopAutoScrolling()
{
    if ( m_timerAutoScroll )
    {
        wxDELETE(m_timerAutoScroll);
    }
}

void wxHtmlWindow::OnMouseEnter(wxMouseEvent& event)
{
    StopAutoScrolling();
    event.Skip();
}

void wxHtmlWindow::OnMouseLeave(wxMouseEvent& event)
{
    // don't prevent the usual processing of the event from taking place
    event.Skip();

    // when a captured mouse leave a scrolled window we start generate
    // scrolling events to allow, for example, extending selection beyond the
    // visible area in some controls
    if ( wxWindow::GetCapture() == this )
    {
        // where is the mouse leaving?
        int pos, orient;
        wxPoint pt = event.GetPosition();
        if ( pt.x < 0 )
        {
            orient = wxHORIZONTAL;
            pos = 0;
        }
        else if ( pt.y < 0 )
        {
            orient = wxVERTICAL;
            pos = 0;
        }
        else // we're lower or to the right of the window
        {
            wxSize size = GetClientSize();
            if ( pt.x > size.x )
            {
                orient = wxHORIZONTAL;
                pos = GetVirtualSize().x / wxHTML_SCROLL_STEP;
            }
            else if ( pt.y > size.y )
            {
                orient = wxVERTICAL;
                pos = GetVirtualSize().y / wxHTML_SCROLL_STEP;
            }
            else // this should be impossible
            {
                // but seems to happen sometimes under wxMSW - maybe it's a bug
                // there but for now just ignore it

                //wxFAIL_MSG( _T("can't understand where has mouse gone") );

                return;
            }
        }

        // only start the auto scroll timer if the window can be scrolled in
        // this direction
        if ( !HasScrollbar(orient) )
            return;

        delete m_timerAutoScroll;
        m_timerAutoScroll = new wxHtmlWinAutoScrollTimer
                                (
                                    this,
                                    pos == 0 ? wxEVT_SCROLLWIN_LINEUP
                                             : wxEVT_SCROLLWIN_LINEDOWN,
                                    pos,
                                    orient
                                );
        m_timerAutoScroll->Start(50); // FIXME: make configurable
    }
}

void wxHtmlWindow::OnKeyUp(wxKeyEvent& event)
{
    if ( IsSelectionEnabled() && event.GetKeyCode() == 'C' && event.CmdDown() )
    {
        (void) CopySelection();
    }
}

void wxHtmlWindow::OnCopy(wxCommandEvent& WXUNUSED(event))
{
    (void) CopySelection();
}

void wxHtmlWindow::OnDoubleClick(wxMouseEvent& event)
{
    // select word under cursor:
    if ( IsSelectionEnabled() )
    {
        SelectWord(CalcUnscrolledPosition(event.GetPosition()));

        (void) CopySelection(Primary);

        m_lastDoubleClick = wxGetLocalTimeMillis();
    }
    else
        event.Skip();
}

void wxHtmlWindow::SelectWord(const wxPoint& pos)
{
    if ( m_Cell )
    {
        wxHtmlCell *cell = m_Cell->FindCellByPos(pos.x, pos.y);
        if ( cell )
        {
            delete m_selection;
            m_selection = new wxHtmlSelection();
            m_selection->Set(cell, cell);
            RefreshRect(wxRect(CalcScrolledPosition(cell->GetAbsPos()),
                               wxSize(cell->GetWidth(), cell->GetHeight())));
        }
    }
}

void wxHtmlWindow::SelectLine(const wxPoint& pos)
{
    if ( m_Cell )
    {
        wxHtmlCell *cell = m_Cell->FindCellByPos(pos.x, pos.y);
        if ( cell )
        {
            // We use following heuristic to find a "line": let the line be all
            // cells in same container as the cell under mouse cursor that are
            // neither completely above nor completely bellow the clicked cell
            // (i.e. are likely to be words positioned on same line of text).

            int y1 = cell->GetAbsPos().y;
            int y2 = y1 + cell->GetHeight();
            int y;
            const wxHtmlCell *c;
            const wxHtmlCell *before = NULL;
            const wxHtmlCell *after = NULL;

            // find last cell of line:
            for ( c = cell->GetNext(); c; c = c->GetNext())
            {
                y = c->GetAbsPos().y;
                if ( y + c->GetHeight() > y1 && y < y2 )
                    after = c;
                else
                    break;
            }
            if ( !after )
                after = cell;

            // find first cell of line:
            for ( c = cell->GetParent()->GetFirstChild();
                    c && c != cell; c = c->GetNext())
            {
                y = c->GetAbsPos().y;
                if ( y + c->GetHeight() > y1 && y < y2 )
                {
                    if ( ! before )
                        before = c;
                }
                else
                    before = NULL;
            }
            if ( !before )
                before = cell;

            delete m_selection;
            m_selection = new wxHtmlSelection();
            m_selection->Set(before, after);

            Refresh();
        }
    }
}

void wxHtmlWindow::SelectAll()
{
    if ( m_Cell )
    {
        delete m_selection;
        m_selection = new wxHtmlSelection();
        m_selection->Set(m_Cell->GetFirstTerminal(), m_Cell->GetLastTerminal());
        Refresh();
    }
}

#endif // wxUSE_CLIPBOARD



IMPLEMENT_ABSTRACT_CLASS(wxHtmlProcessor,wxObject)

#if wxUSE_EXTENDED_RTTI
IMPLEMENT_DYNAMIC_CLASS_XTI(wxHtmlWindow, wxScrolledWindow,"wx/html/htmlwin.h")

wxBEGIN_PROPERTIES_TABLE(wxHtmlWindow)
/*
    TODO PROPERTIES
        style , wxHW_SCROLLBAR_AUTO
        borders , (dimension)
        url , string
        htmlcode , string
*/
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxHtmlWindow)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_5( wxHtmlWindow , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle )
#else
IMPLEMENT_DYNAMIC_CLASS(wxHtmlWindow,wxScrolledWindow)
#endif

BEGIN_EVENT_TABLE(wxHtmlWindow, wxScrolledWindow)
    EVT_SIZE(wxHtmlWindow::OnSize)
    EVT_LEFT_DOWN(wxHtmlWindow::OnMouseDown)
    EVT_LEFT_UP(wxHtmlWindow::OnMouseUp)
    EVT_RIGHT_UP(wxHtmlWindow::OnMouseUp)
    EVT_MOTION(wxHtmlWindow::OnMouseMove)
    EVT_ERASE_BACKGROUND(wxHtmlWindow::OnEraseBackground)
    EVT_PAINT(wxHtmlWindow::OnPaint)
#if wxUSE_CLIPBOARD
    EVT_LEFT_DCLICK(wxHtmlWindow::OnDoubleClick)
    EVT_ENTER_WINDOW(wxHtmlWindow::OnMouseEnter)
    EVT_LEAVE_WINDOW(wxHtmlWindow::OnMouseLeave)
    EVT_KEY_UP(wxHtmlWindow::OnKeyUp)
    EVT_MENU(wxID_COPY, wxHtmlWindow::OnCopy)
#endif // wxUSE_CLIPBOARD
END_EVENT_TABLE()





// A module to allow initialization/cleanup
// without calling these functions from app.cpp or from
// the user's application.

class wxHtmlWinModule: public wxModule
{
DECLARE_DYNAMIC_CLASS(wxHtmlWinModule)
public:
    wxHtmlWinModule() : wxModule() {}
    bool OnInit() { return true; }
    void OnExit() { wxHtmlWindow::CleanUpStatics(); }
};

IMPLEMENT_DYNAMIC_CLASS(wxHtmlWinModule, wxModule)


// This hack forces the linker to always link in m_* files
// (wxHTML doesn't work without handlers from these files)
#include "wx/html/forcelnk.h"
FORCE_WXHTML_MODULES()

#endif // wxUSE_HTML