src/html/htmlwin.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        htmlwin.cpp
// Purpose:     wxHtmlWindow class for parsing & displaying HTML (implementation)
// Author:      Vaclav Slavik
// RCS-ID:      $Id$
// Copyright:   (c) 1999 Vaclav Slavik
// Licence:     wxWindows Licence
/////////////////////////////////////////////////////////////////////////////


#ifdef __GNUG__
#pragma implementation "htmlwin.h"
#pragma implementation "htmlproc.h"
#endif

#include "wx/wxprec.h"

#include "wx/defs.h"
#if wxUSE_HTML && wxUSE_STREAMS

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WXPRECOMP
    #include "wx/log.h"
    #include "wx/intl.h"
    #include "wx/dcclient.h"
    #include "wx/frame.h"
#endif

#include "wx/html/htmlwin.h"
#include "wx/html/htmlproc.h"
#include "wx/list.h"

#include "wx/arrimpl.cpp"
#include "wx/listimpl.cpp"

//-----------------------------------------------------------------------------
// wxHtmlHistoryItem
//-----------------------------------------------------------------------------

// item of history list
class WXDLLEXPORT wxHtmlHistoryItem
{
public:
    wxHtmlHistoryItem(const wxString& p, const wxString& a) {m_Page = p, m_Anchor = a, m_Pos = 0;}
    int GetPos() const {return m_Pos;}
    void SetPos(int p) {m_Pos = p;}
    const wxString& GetPage() const {return m_Page;}
    const wxString& GetAnchor() const {return m_Anchor;}

private:
    wxString m_Page;
    wxString m_Anchor;
    int m_Pos;
};


//-----------------------------------------------------------------------------
// our private arrays:
//-----------------------------------------------------------------------------

WX_DECLARE_OBJARRAY(wxHtmlHistoryItem, wxHtmlHistoryArray);
WX_DEFINE_OBJARRAY(wxHtmlHistoryArray);

WX_DECLARE_LIST(wxHtmlProcessor, wxHtmlProcessorList);
WX_DEFINE_LIST(wxHtmlProcessorList);

//-----------------------------------------------------------------------------
// wxHtmlWindow
//-----------------------------------------------------------------------------


void wxHtmlWindow::Init()
{
    m_tmpMouseMoved = FALSE;
    m_tmpLastLink = NULL;
    m_tmpLastCell = NULL;
    m_tmpCanDrawLocks = 0;
    m_FS = new wxFileSystem();
    m_RelatedStatusBar = -1;
    m_RelatedFrame = NULL;
    m_TitleFormat = wxT("%s");
    m_OpenedPage = m_OpenedAnchor = m_OpenedPageTitle = wxEmptyString;
    m_Cell = NULL;
    m_Parser = new wxHtmlWinParser(this);
    m_Parser->SetFS(m_FS);
    m_HistoryPos = -1;
    m_HistoryOn = TRUE;
    m_History = new wxHtmlHistoryArray;
    m_Processors = NULL;
    m_Style = 0;
    SetBorders(10);
}

bool wxHtmlWindow::Create(wxWindow *parent, wxWindowID id,
                          const wxPoint& pos, const wxSize& size,
                          long style, const wxString& name)
{
    if (!wxScrolledWindow::Create(parent, id, pos, size,
                                  style | wxVSCROLL | wxHSCROLL, name))
        return FALSE;

    m_Style = style;
    SetPage(wxT("<html><body></body></html>"));
    return TRUE;
}


wxHtmlWindow::~wxHtmlWindow()
{
    HistoryClear();

    if (m_Cell) delete m_Cell;

    delete m_Parser;
    delete m_FS;
    delete m_History;
    delete m_Processors;
}


void wxHtmlWindow::SetRelatedFrame(wxFrame* frame, const wxString& format)
{
    m_RelatedFrame = frame;
    m_TitleFormat = format;
}


void wxHtmlWindow::SetRelatedStatusBar(int bar)
{
    m_RelatedStatusBar = bar;
}


void wxHtmlWindow::SetFonts(wxString normal_face, wxString fixed_face, const int *sizes)
{
    wxString op = m_OpenedPage;

    m_Parser->SetFonts(normal_face, fixed_face, sizes);
    // fonts changed => contents invalid, so reload the page:
    SetPage(wxT("<html><body></body></html>"));
    if (!op.IsEmpty()) LoadPage(op);
}


bool wxHtmlWindow::SetPage(const wxString& source)
{
    wxString newsrc(source);

    // pass HTML through registered processors:
    if (m_Processors || m_GlobalProcessors)
    {
        wxHtmlProcessorList::Node *nodeL, *nodeG;
        int prL, prG;

        nodeL = (m_Processors) ? m_Processors->GetFirst() : NULL;
        nodeG = (m_GlobalProcessors) ? m_GlobalProcessors->GetFirst() : NULL;

        // VS: there are two lists, global and local, both of them sorted by
        //     priority. Since we have to go through _both_ lists with
        //     decreasing priority, we "merge-sort" the lists on-line by
        //     processing that one of the two heads that has higher priority
        //     in every iteration
        while (nodeL || nodeG)
        {
            prL = (nodeL) ? nodeL->GetData()->GetPriority() : -1;
            prG = (nodeG) ? nodeG->GetData()->GetPriority() : -1;
            if (prL > prG)
            {
                if (nodeL->GetData()->IsEnabled())
                    newsrc = nodeL->GetData()->Process(newsrc);
                nodeL = nodeL->GetNext();
            }
            else // prL <= prG
            {
                if (nodeG->GetData()->IsEnabled())
                    newsrc = nodeG->GetData()->Process(newsrc);
                nodeG = nodeG->GetNext();
            }
        }
    }

    // ...and run the parser on it:
    wxClientDC *dc = new wxClientDC(this);
    dc->SetMapMode(wxMM_TEXT);
    SetBackgroundColour(wxColour(0xFF, 0xFF, 0xFF));
    m_OpenedPage = m_OpenedAnchor = m_OpenedPageTitle = wxEmptyString;
    m_Parser->SetDC(dc);
    if (m_Cell)
    {
        delete m_Cell;
        m_Cell = NULL;
    }
    m_Cell = (wxHtmlContainerCell*) m_Parser->Parse(newsrc);
    delete dc;
    m_Cell->SetIndent(m_Borders, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
    m_Cell->SetAlignHor(wxHTML_ALIGN_CENTER);
    CreateLayout();
    if (m_tmpCanDrawLocks == 0)
        Refresh();
    return TRUE;
}

bool wxHtmlWindow::AppendToPage(const wxString& source)
{
    return SetPage(*(GetParser()->GetSource()) + source);
}

bool wxHtmlWindow::LoadPage(const wxString& location)
{
    wxBusyCursor busyCursor;

    wxFSFile *f;
    bool rt_val;
    bool needs_refresh = FALSE;

    m_tmpCanDrawLocks++;
    if (m_HistoryOn && (m_HistoryPos != -1))
    {
        // store scroll position into history item:
        int x, y;
        GetViewStart(&x, &y);
        (*m_History)[m_HistoryPos].SetPos(y);
    }

    if (location[0] == wxT('#'))
    {
        // local anchor:
        wxString anch = location.Mid(1) /*1 to end*/;
        m_tmpCanDrawLocks--;
        rt_val = ScrollToAnchor(anch);
        m_tmpCanDrawLocks++;
    }
    else if (location.Find(wxT('#')) != wxNOT_FOUND && location.BeforeFirst(wxT('#')) == m_OpenedPage)
    {
        wxString anch = location.AfterFirst(wxT('#'));
        m_tmpCanDrawLocks--;
        rt_val = ScrollToAnchor(anch);
        m_tmpCanDrawLocks++;
    }
    else if (location.Find(wxT('#')) != wxNOT_FOUND &&
             (m_FS->GetPath() + location.BeforeFirst(wxT('#'))) == m_OpenedPage)
    {
        wxString anch = location.AfterFirst(wxT('#'));
        m_tmpCanDrawLocks--;
        rt_val = ScrollToAnchor(anch);
        m_tmpCanDrawLocks++;
    }

    else
    {
        needs_refresh = TRUE;
        // load&display it:
        if (m_RelatedStatusBar != -1)
        {
            m_RelatedFrame->SetStatusText(_("Connecting..."), m_RelatedStatusBar);
            Refresh(FALSE);
        }

        f = m_Parser->OpenURL(wxHTML_URL_PAGE, location);

        // try to interpret 'location' as filename instead of URL:
        if (f == NULL)
        {
            wxFileName fn(location);
            wxString location2 = wxFileSystem::FileNameToURL(fn);
            f = m_Parser->OpenURL(wxHTML_URL_PAGE, location2);
        }

        if (f == NULL)
        {
            wxLogError(_("Unable to open requested HTML document: %s"), location.c_str());
            m_tmpCanDrawLocks--;
            return FALSE;
        }

        else
        {
            wxNode *node;
            wxString src = wxEmptyString;

            if (m_RelatedStatusBar != -1)
            {
                wxString msg = _("Loading : ") + location;
                m_RelatedFrame->SetStatusText(msg, m_RelatedStatusBar);
                Refresh(FALSE);
            }

            node = m_Filters.GetFirst();
            while (node)
            {
                wxHtmlFilter *h = (wxHtmlFilter*) node->GetData();
                if (h->CanRead(*f))
                {
                    src = h->ReadFile(*f);
                    break;
                }
                node = node->GetNext();
            }
            if (src == wxEmptyString)
            {
                if (m_DefaultFilter == NULL) m_DefaultFilter = GetDefaultFilter();
                src = m_DefaultFilter->ReadFile(*f);
            }

            m_FS->ChangePathTo(f->GetLocation());
            rt_val = SetPage(src);
            m_OpenedPage = f->GetLocation();
            if (f->GetAnchor() != wxEmptyString)
            {
                ScrollToAnchor(f->GetAnchor());
            }

            delete f;

            if (m_RelatedStatusBar != -1) m_RelatedFrame->SetStatusText(_("Done"), m_RelatedStatusBar);
        }
    }

    if (m_HistoryOn) // add this page to history there:
    {
        int c = m_History->GetCount() - (m_HistoryPos + 1);

        if (m_HistoryPos < 0 ||
            (*m_History)[m_HistoryPos].GetPage() != m_OpenedPage ||
            (*m_History)[m_HistoryPos].GetAnchor() != m_OpenedAnchor)
        {
            m_HistoryPos++;
            for (int i = 0; i < c; i++)
                m_History->RemoveAt(m_HistoryPos);
            m_History->Add(new wxHtmlHistoryItem(m_OpenedPage, m_OpenedAnchor));
        }
    }

    if (m_OpenedPageTitle == wxEmptyString)
        OnSetTitle(wxFileNameFromPath(m_OpenedPage));

    if (needs_refresh)
    {
        m_tmpCanDrawLocks--;
        Refresh();
    }
    else
        m_tmpCanDrawLocks--;

    return rt_val;
}


bool wxHtmlWindow::LoadFile(const wxFileName& filename)
{
    wxString url = wxFileSystem::FileNameToURL(filename);
    return LoadPage(url);
}


bool wxHtmlWindow::ScrollToAnchor(const wxString& anchor)
{
    const wxHtmlCell *c = m_Cell->Find(wxHTML_COND_ISANCHOR, &anchor);
    if (!c)
    {
        wxLogWarning(_("HTML anchor %s does not exist."), anchor.c_str());
        return FALSE;
    }
    else
    {
        int y;

        for (y = 0; c != NULL; c = c->GetParent()) y += c->GetPosY();
        Scroll(-1, y / wxHTML_SCROLL_STEP);
        m_OpenedAnchor = anchor;
        return TRUE;
    }
}


void wxHtmlWindow::OnSetTitle(const wxString& title)
{
    if (m_RelatedFrame)
    {
        wxString tit;
        tit.Printf(m_TitleFormat, title.c_str());
        m_RelatedFrame->SetTitle(tit);
    }
    m_OpenedPageTitle = title;
}


void wxHtmlWindow::CreateLayout()
{
    int ClientWidth, ClientHeight;

    if (!m_Cell) return;

    if (m_Style & wxHW_SCROLLBAR_NEVER)
    {
        SetScrollbars(wxHTML_SCROLL_STEP, 1, m_Cell->GetWidth() / wxHTML_SCROLL_STEP, 0); // always off
        GetClientSize(&ClientWidth, &ClientHeight);
        m_Cell->Layout(ClientWidth);
    }

    else {
        GetClientSize(&ClientWidth, &ClientHeight);
        m_Cell->Layout(ClientWidth);
        if (ClientHeight < m_Cell->GetHeight() + GetCharHeight())
        {
            SetScrollbars(
                  wxHTML_SCROLL_STEP, wxHTML_SCROLL_STEP,
                  m_Cell->GetWidth() / wxHTML_SCROLL_STEP,
                  (m_Cell->GetHeight() + GetCharHeight()) / wxHTML_SCROLL_STEP
                  /*cheat: top-level frag is always container*/);
        }
        else /* we fit into window, no need for scrollbars */
        {
            SetScrollbars(wxHTML_SCROLL_STEP, 1, m_Cell->GetWidth() / wxHTML_SCROLL_STEP, 0); // disable...
            GetClientSize(&ClientWidth, &ClientHeight);
            m_Cell->Layout(ClientWidth); // ...and relayout
        }
    }
}


void wxHtmlWindow::ReadCustomization(wxConfigBase *cfg, wxString path)
{
    wxString oldpath;
    wxString tmp;
    int p_fontsizes[7];
    wxString p_fff, p_ffn;

    if (path != wxEmptyString)
    {
        oldpath = cfg->GetPath();
        cfg->SetPath(path);
    }

    m_Borders = cfg->Read(wxT("wxHtmlWindow/Borders"), m_Borders);
    p_fff = cfg->Read(wxT("wxHtmlWindow/FontFaceFixed"), m_Parser->m_FontFaceFixed);
    p_ffn = cfg->Read(wxT("wxHtmlWindow/FontFaceNormal"), m_Parser->m_FontFaceNormal);
    for (int i = 0; i < 7; i++)
    {
        tmp.Printf(wxT("wxHtmlWindow/FontsSize%i"), i);
        p_fontsizes[i] = cfg->Read(tmp, m_Parser->m_FontsSizes[i]);
    }
    SetFonts(p_ffn, p_fff, p_fontsizes);

    if (path != wxEmptyString)
        cfg->SetPath(oldpath);
}


void wxHtmlWindow::WriteCustomization(wxConfigBase *cfg, wxString path)
{
    wxString oldpath;
    wxString tmp;

    if (path != wxEmptyString)
    {
        oldpath = cfg->GetPath();
        cfg->SetPath(path);
    }

    cfg->Write(wxT("wxHtmlWindow/Borders"), (long) m_Borders);
    cfg->Write(wxT("wxHtmlWindow/FontFaceFixed"), m_Parser->m_FontFaceFixed);
    cfg->Write(wxT("wxHtmlWindow/FontFaceNormal"), m_Parser->m_FontFaceNormal);
    for (int i = 0; i < 7; i++)
    {
        tmp.Printf(wxT("wxHtmlWindow/FontsSize%i"), i);
        cfg->Write(tmp, (long) m_Parser->m_FontsSizes[i]);
    }

    if (path != wxEmptyString)
        cfg->SetPath(oldpath);
}


bool wxHtmlWindow::HistoryBack()
{
    wxString a, l;

    if (m_HistoryPos < 1) return FALSE;

    // store scroll position into history item:
    int x, y;
    GetViewStart(&x, &y);
    (*m_History)[m_HistoryPos].SetPos(y);

    // go to previous position:
    m_HistoryPos--;

    l = (*m_History)[m_HistoryPos].GetPage();
    a = (*m_History)[m_HistoryPos].GetAnchor();
    m_HistoryOn = FALSE;
    m_tmpCanDrawLocks++;
    if (a == wxEmptyString) LoadPage(l);
    else LoadPage(l + wxT("#") + a);
    m_HistoryOn = TRUE;
    m_tmpCanDrawLocks--;
    Scroll(0, (*m_History)[m_HistoryPos].GetPos());
    Refresh();
    return TRUE;
}

bool wxHtmlWindow::HistoryCanBack()
{
    if (m_HistoryPos < 1) return FALSE;
    return TRUE ;
}


bool wxHtmlWindow::HistoryForward()
{
    wxString a, l;

    if (m_HistoryPos == -1) return FALSE;
    if (m_HistoryPos >= (int)m_History->GetCount() - 1)return FALSE;

    m_OpenedPage = wxEmptyString; // this will disable adding new entry into history in LoadPage()

    m_HistoryPos++;
    l = (*m_History)[m_HistoryPos].GetPage();
    a = (*m_History)[m_HistoryPos].GetAnchor();
    m_HistoryOn = FALSE;
    m_tmpCanDrawLocks++;
    if (a == wxEmptyString) LoadPage(l);
    else LoadPage(l + wxT("#") + a);
    m_HistoryOn = TRUE;
    m_tmpCanDrawLocks--;
    Scroll(0, (*m_History)[m_HistoryPos].GetPos());
    Refresh();
    return TRUE;
}

bool wxHtmlWindow::HistoryCanForward()
{
    if (m_HistoryPos == -1) return FALSE;
    if (m_HistoryPos >= (int)m_History->GetCount() - 1)return FALSE;
    return TRUE ;
}


void wxHtmlWindow::HistoryClear()
{
    m_History->Empty();
    m_HistoryPos = -1;
}

void wxHtmlWindow::AddProcessor(wxHtmlProcessor *processor)
{
    if (!m_Processors)
    {
        m_Processors = new wxHtmlProcessorList;
        m_Processors->DeleteContents(TRUE);
    }
    wxHtmlProcessorList::Node *node;

    for (node = m_Processors->GetFirst(); node; node = node->GetNext())
    {
        if (processor->GetPriority() > node->GetData()->GetPriority())
        {
            m_Processors->Insert(node, processor);
            return;
        }
    }
    m_Processors->Append(processor);
}

/*static */ void wxHtmlWindow::AddGlobalProcessor(wxHtmlProcessor *processor)
{
    if (!m_GlobalProcessors)
    {
        m_GlobalProcessors = new wxHtmlProcessorList;
        m_GlobalProcessors->DeleteContents(TRUE);
    }
    wxHtmlProcessorList::Node *node;

    for (node = m_GlobalProcessors->GetFirst(); node; node = node->GetNext())
    {
        if (processor->GetPriority() > node->GetData()->GetPriority())
        {
            m_GlobalProcessors->Insert(node, processor);
            return;
        }
    }
    m_GlobalProcessors->Append(processor);
}


wxList wxHtmlWindow::m_Filters;
wxHtmlFilter *wxHtmlWindow::m_DefaultFilter = NULL;
wxCursor *wxHtmlWindow::s_cur_hand = NULL;
wxCursor *wxHtmlWindow::s_cur_arrow = NULL;
wxHtmlProcessorList *wxHtmlWindow::m_GlobalProcessors = NULL;

void wxHtmlWindow::CleanUpStatics()
{
    wxDELETE(m_DefaultFilter);
    m_Filters.DeleteContents(TRUE);
    m_Filters.Clear();
    wxDELETE(m_GlobalProcessors);
    wxDELETE(s_cur_hand);
    wxDELETE(s_cur_arrow);
}


void wxHtmlWindow::AddFilter(wxHtmlFilter *filter)
{
    m_Filters.Append(filter);
}


void wxHtmlWindow::OnLinkClicked(const wxHtmlLinkInfo& link)
{
    LoadPage(link.GetHref());
}

void wxHtmlWindow::OnCellClicked(wxHtmlCell *cell,
                                 wxCoord x, wxCoord y,
                                 const wxMouseEvent& event)
{
    wxCHECK_RET( cell, _T("can't be called with NULL cell") );

    cell->OnMouseClick(this, x, y, event);
}

void wxHtmlWindow::OnCellMouseHover(wxHtmlCell * WXUNUSED(cell),
                                    wxCoord WXUNUSED(x), wxCoord WXUNUSED(y))
{
    // do nothing here
}

void wxHtmlWindow::OnDraw(wxDC& dc)
{
    if (m_tmpCanDrawLocks > 0 || m_Cell == NULL) return;

    int x, y;
    wxRect rect = GetUpdateRegion().GetBox();

    dc.SetMapMode(wxMM_TEXT);
    dc.SetBackgroundMode(wxTRANSPARENT);
    GetViewStart(&x, &y);

    m_Cell->Draw(dc, 0, 0,
                 y * wxHTML_SCROLL_STEP + rect.GetTop(),
                 y * wxHTML_SCROLL_STEP + rect.GetBottom());
}


void wxHtmlWindow::OnSize(wxSizeEvent& event)
{
    wxScrolledWindow::OnSize(event);
    CreateLayout();
    Refresh();
}


void wxHtmlWindow::OnMouseEvent(wxMouseEvent& event)
{
    m_tmpMouseMoved = TRUE;

    if (event.ButtonDown())
    {
        SetFocus();
        if ( m_Cell )
        {
            int sx, sy;
            GetViewStart(&sx, &sy);
            sx *= wxHTML_SCROLL_STEP;
            sy *= wxHTML_SCROLL_STEP;

            wxPoint pos = event.GetPosition();
            pos.x += sx;
            pos.y += sy;

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

            // VZ: is it possible that we don't find anything at all?
            // VS: yes. FindCellByPos returns terminal cell and
            //     containers may have empty borders
            if ( cell )
                OnCellClicked(cell, pos.x, pos.y, event);
        }
    }
}


void wxHtmlWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
{
    if (s_cur_hand == NULL)
    {
        s_cur_hand = new wxCursor(wxCURSOR_HAND);
        s_cur_arrow = new wxCursor(wxCURSOR_ARROW);
    }

    if (m_tmpMouseMoved && (m_Cell != NULL))
    {
        int sx, sy;
        GetViewStart(&sx, &sy);
        sx *= wxHTML_SCROLL_STEP;
        sy *= wxHTML_SCROLL_STEP;

        int x, y;
        wxGetMousePosition(&x, &y);
        ScreenToClient(&x, &y);
        x += sx;
        y += sy;

        wxHtmlCell *cell = m_Cell->FindCellByPos(x, y);
        if ( cell != m_tmpLastCell )
        {
            wxHtmlLinkInfo *lnk = cell ? cell->GetLink(x, y) : NULL;

            if (lnk != m_tmpLastLink)
            {
                if (lnk == NULL)
                {
                    SetCursor(*s_cur_arrow);
                    if (m_RelatedStatusBar != -1)
                        m_RelatedFrame->SetStatusText(wxEmptyString, m_RelatedStatusBar);
                }
                else
                {
                    SetCursor(*s_cur_hand);
                    if (m_RelatedStatusBar != -1)
                        m_RelatedFrame->SetStatusText(lnk->GetHref(), m_RelatedStatusBar);
                }
                m_tmpLastLink = lnk;
            }

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

        m_tmpMouseMoved = FALSE;
    }
}


IMPLEMENT_ABSTRACT_CLASS(wxHtmlProcessor,wxObject)

IMPLEMENT_DYNAMIC_CLASS(wxHtmlWindow,wxScrolledWindow)

BEGIN_EVENT_TABLE(wxHtmlWindow, wxScrolledWindow)
    EVT_SIZE(wxHtmlWindow::OnSize)
    EVT_LEFT_DOWN(wxHtmlWindow::OnMouseEvent)
    EVT_RIGHT_DOWN(wxHtmlWindow::OnMouseEvent)
    EVT_MOTION(wxHtmlWindow::OnMouseEvent)
    EVT_IDLE(wxHtmlWindow::OnIdle)
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
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: htmlwin.cpp
	3	// Purpose: wxHtmlWindow class for parsing & displaying HTML (implementation)
	4	// Author: Vaclav Slavik
	5	// RCS-ID: $Id$
	6	// Copyright: (c) 1999 Vaclav Slavik
	7	// Licence: wxWindows Licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#ifdef __GNUG__
	12	#pragma implementation "htmlwin.h"
	13	#pragma implementation "htmlproc.h"
	14	#endif
	15
	16	#include "wx/wxprec.h"
	17
	18	#include "wx/defs.h"
	19	#if wxUSE_HTML && wxUSE_STREAMS
	20
	21	#ifdef __BORLANDC__
	22	#pragma hdrstop
	23	#endif
	24
	25	#ifndef WXPRECOMP
	26	#include "wx/log.h"
	27	#include "wx/intl.h"
	28	#include "wx/dcclient.h"
	29	#include "wx/frame.h"
	30	#endif
	31
	32	#include "wx/html/htmlwin.h"
	33	#include "wx/html/htmlproc.h"
	34	#include "wx/list.h"
	35
	36	#include "wx/arrimpl.cpp"
	37	#include "wx/listimpl.cpp"
	38
	39	//-----------------------------------------------------------------------------
	40	// wxHtmlHistoryItem
	41	//-----------------------------------------------------------------------------
	42
	43	// item of history list
	44	class WXDLLEXPORT wxHtmlHistoryItem
	45	{
	46	public:
	47	wxHtmlHistoryItem(const wxString& p, const wxString& a) {m_Page = p, m_Anchor = a, m_Pos = 0;}
	48	int GetPos() const {return m_Pos;}
	49	void SetPos(int p) {m_Pos = p;}
	50	const wxString& GetPage() const {return m_Page;}
	51	const wxString& GetAnchor() const {return m_Anchor;}
	52
	53	private:
	54	wxString m_Page;
	55	wxString m_Anchor;
	56	int m_Pos;
	57	};
	58
	59
	60	//-----------------------------------------------------------------------------
	61	// our private arrays:
	62	//-----------------------------------------------------------------------------
	63
	64	WX_DECLARE_OBJARRAY(wxHtmlHistoryItem, wxHtmlHistoryArray);
	65	WX_DEFINE_OBJARRAY(wxHtmlHistoryArray);
	66
	67	WX_DECLARE_LIST(wxHtmlProcessor, wxHtmlProcessorList);
	68	WX_DEFINE_LIST(wxHtmlProcessorList);
	69
	70	//-----------------------------------------------------------------------------
	71	// wxHtmlWindow
	72	//-----------------------------------------------------------------------------
	73
	74
	75	void wxHtmlWindow::Init()
	76	{
	77	m_tmpMouseMoved = FALSE;
	78	m_tmpLastLink = NULL;
	79	m_tmpLastCell = NULL;
	80	m_tmpCanDrawLocks = 0;
	81	m_FS = new wxFileSystem();
	82	m_RelatedStatusBar = -1;
	83	m_RelatedFrame = NULL;
	84	m_TitleFormat = wxT("%s");
	85	m_OpenedPage = m_OpenedAnchor = m_OpenedPageTitle = wxEmptyString;
	86	m_Cell = NULL;
	87	m_Parser = new wxHtmlWinParser(this);
	88	m_Parser->SetFS(m_FS);
	89	m_HistoryPos = -1;
	90	m_HistoryOn = TRUE;
	91	m_History = new wxHtmlHistoryArray;
	92	m_Processors = NULL;
	93	m_Style = 0;
	94	SetBorders(10);
	95	}
	96
	97	bool wxHtmlWindow::Create(wxWindow *parent, wxWindowID id,
	98	const wxPoint& pos, const wxSize& size,
	99	long style, const wxString& name)
	100	{
	101	if (!wxScrolledWindow::Create(parent, id, pos, size,
	102	style \| wxVSCROLL \| wxHSCROLL, name))
	103	return FALSE;
	104
	105	m_Style = style;
	106	SetPage(wxT("<html><body></body></html>"));
	107	return TRUE;
	108	}
	109
	110
	111	wxHtmlWindow::~wxHtmlWindow()
	112	{
	113	HistoryClear();
	114
	115	if (m_Cell) delete m_Cell;
	116
	117	delete m_Parser;
	118	delete m_FS;
	119	delete m_History;
	120	delete m_Processors;
	121	}
	122
	123
	124
	125	void wxHtmlWindow::SetRelatedFrame(wxFrame* frame, const wxString& format)
	126	{
	127	m_RelatedFrame = frame;
	128	m_TitleFormat = format;
	129	}
	130
	131
	132
	133	void wxHtmlWindow::SetRelatedStatusBar(int bar)
	134	{
	135	m_RelatedStatusBar = bar;
	136	}
	137
	138
	139
	140	void wxHtmlWindow::SetFonts(wxString normal_face, wxString fixed_face, const int *sizes)
	141	{
	142	wxString op = m_OpenedPage;
	143
	144	m_Parser->SetFonts(normal_face, fixed_face, sizes);
	145	// fonts changed => contents invalid, so reload the page:
	146	SetPage(wxT("<html><body></body></html>"));
	147	if (!op.IsEmpty()) LoadPage(op);
	148	}
	149
	150
	151
	152	bool wxHtmlWindow::SetPage(const wxString& source)
	153	{
	154	wxString newsrc(source);
	155
	156	// pass HTML through registered processors:
	157	if (m_Processors \|\| m_GlobalProcessors)
	158	{
	159	wxHtmlProcessorList::Node nodeL, nodeG;
	160	int prL, prG;
	161
	162	nodeL = (m_Processors) ? m_Processors->GetFirst() : NULL;
	163	nodeG = (m_GlobalProcessors) ? m_GlobalProcessors->GetFirst() : NULL;
	164
	165	// VS: there are two lists, global and local, both of them sorted by
	166	// priority. Since we have to go through _both_ lists with
	167	// decreasing priority, we "merge-sort" the lists on-line by
	168	// processing that one of the two heads that has higher priority
	169	// in every iteration
	170	while (nodeL \|\| nodeG)
	171	{
	172	prL = (nodeL) ? nodeL->GetData()->GetPriority() : -1;
	173	prG = (nodeG) ? nodeG->GetData()->GetPriority() : -1;
	174	if (prL > prG)
	175	{
	176	if (nodeL->GetData()->IsEnabled())
	177	newsrc = nodeL->GetData()->Process(newsrc);
	178	nodeL = nodeL->GetNext();
	179	}
	180	else // prL <= prG
	181	{
	182	if (nodeG->GetData()->IsEnabled())
	183	newsrc = nodeG->GetData()->Process(newsrc);
	184	nodeG = nodeG->GetNext();
	185	}
	186	}
	187	}
	188
	189	// ...and run the parser on it:
	190	wxClientDC *dc = new wxClientDC(this);
	191	dc->SetMapMode(wxMM_TEXT);
	192	SetBackgroundColour(wxColour(0xFF, 0xFF, 0xFF));
	193	m_OpenedPage = m_OpenedAnchor = m_OpenedPageTitle = wxEmptyString;
	194	m_Parser->SetDC(dc);
	195	if (m_Cell)
	196	{
	197	delete m_Cell;
	198	m_Cell = NULL;
	199	}
	200	m_Cell = (wxHtmlContainerCell*) m_Parser->Parse(newsrc);
	201	delete dc;
	202	m_Cell->SetIndent(m_Borders, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
	203	m_Cell->SetAlignHor(wxHTML_ALIGN_CENTER);
	204	CreateLayout();
	205	if (m_tmpCanDrawLocks == 0)
	206	Refresh();
	207	return TRUE;
	208	}
	209
	210	bool wxHtmlWindow::AppendToPage(const wxString& source)
	211	{
	212	return SetPage(*(GetParser()->GetSource()) + source);
	213	}
	214
	215	bool wxHtmlWindow::LoadPage(const wxString& location)
	216	{
	217	wxBusyCursor busyCursor;
	218
	219	wxFSFile *f;
	220	bool rt_val;
	221	bool needs_refresh = FALSE;
	222
	223	m_tmpCanDrawLocks++;
	224	if (m_HistoryOn && (m_HistoryPos != -1))
	225	{
	226	// store scroll position into history item:
	227	int x, y;
	228	GetViewStart(&x, &y);
	229	(*m_History)[m_HistoryPos].SetPos(y);
	230	}
	231
	232	if (location[0] == wxT('#'))
	233	{
	234	// local anchor:
	235	wxString anch = location.Mid(1) /1 to end/;
	236	m_tmpCanDrawLocks--;
	237	rt_val = ScrollToAnchor(anch);
	238	m_tmpCanDrawLocks++;
	239	}
	240	else if (location.Find(wxT('#')) != wxNOT_FOUND && location.BeforeFirst(wxT('#')) == m_OpenedPage)
	241	{
	242	wxString anch = location.AfterFirst(wxT('#'));
	243	m_tmpCanDrawLocks--;
	244	rt_val = ScrollToAnchor(anch);
	245	m_tmpCanDrawLocks++;
	246	}
	247	else if (location.Find(wxT('#')) != wxNOT_FOUND &&
	248	(m_FS->GetPath() + location.BeforeFirst(wxT('#'))) == m_OpenedPage)
	249	{
	250	wxString anch = location.AfterFirst(wxT('#'));
	251	m_tmpCanDrawLocks--;
	252	rt_val = ScrollToAnchor(anch);
	253	m_tmpCanDrawLocks++;
	254	}
	255
	256	else
	257	{
	258	needs_refresh = TRUE;
	259	// load&display it:
	260	if (m_RelatedStatusBar != -1)
	261	{
	262	m_RelatedFrame->SetStatusText(_("Connecting..."), m_RelatedStatusBar);
	263	Refresh(FALSE);
	264	}
	265
	266	f = m_Parser->OpenURL(wxHTML_URL_PAGE, location);
	267
	268	// try to interpret 'location' as filename instead of URL:
	269	if (f == NULL)
	270	{
	271	wxFileName fn(location);
	272	wxString location2 = wxFileSystem::FileNameToURL(fn);
	273	f = m_Parser->OpenURL(wxHTML_URL_PAGE, location2);
	274	}
	275
	276	if (f == NULL)
	277	{
	278	wxLogError(_("Unable to open requested HTML document: %s"), location.c_str());
	279	m_tmpCanDrawLocks--;
	280	return FALSE;
	281	}
	282
	283	else
	284	{
	285	wxNode *node;
	286	wxString src = wxEmptyString;
	287
	288	if (m_RelatedStatusBar != -1)
	289	{
	290	wxString msg = _("Loading : ") + location;
	291	m_RelatedFrame->SetStatusText(msg, m_RelatedStatusBar);
	292	Refresh(FALSE);
	293	}
	294
	295	node = m_Filters.GetFirst();
	296	while (node)
	297	{
	298	wxHtmlFilter h = (wxHtmlFilter) node->GetData();
	299	if (h->CanRead(*f))
	300	{
	301	src = h->ReadFile(*f);
	302	break;
	303	}
	304	node = node->GetNext();
	305	}
	306	if (src == wxEmptyString)
	307	{
	308	if (m_DefaultFilter == NULL) m_DefaultFilter = GetDefaultFilter();
	309	src = m_DefaultFilter->ReadFile(*f);
	310	}
	311
	312	m_FS->ChangePathTo(f->GetLocation());
	313	rt_val = SetPage(src);
	314	m_OpenedPage = f->GetLocation();
	315	if (f->GetAnchor() != wxEmptyString)
	316	{
	317	ScrollToAnchor(f->GetAnchor());
	318	}
	319
	320	delete f;
	321
	322	if (m_RelatedStatusBar != -1) m_RelatedFrame->SetStatusText(_("Done"), m_RelatedStatusBar);
	323	}
	324	}
	325
	326	if (m_HistoryOn) // add this page to history there:
	327	{
	328	int c = m_History->GetCount() - (m_HistoryPos + 1);
	329
	330	if (m_HistoryPos < 0 \|\|
	331	(*m_History)[m_HistoryPos].GetPage() != m_OpenedPage \|\|
	332	(*m_History)[m_HistoryPos].GetAnchor() != m_OpenedAnchor)
	333	{
	334	m_HistoryPos++;
	335	for (int i = 0; i < c; i++)
	336	m_History->RemoveAt(m_HistoryPos);
	337	m_History->Add(new wxHtmlHistoryItem(m_OpenedPage, m_OpenedAnchor));
	338	}
	339	}
	340
	341	if (m_OpenedPageTitle == wxEmptyString)
	342	OnSetTitle(wxFileNameFromPath(m_OpenedPage));
	343
	344	if (needs_refresh)
	345	{
	346	m_tmpCanDrawLocks--;
	347	Refresh();
	348	}
	349	else
	350	m_tmpCanDrawLocks--;
	351
	352	return rt_val;
	353	}
	354
	355
	356	bool wxHtmlWindow::LoadFile(const wxFileName& filename)
	357	{
	358	wxString url = wxFileSystem::FileNameToURL(filename);
	359	return LoadPage(url);
	360	}
	361
	362
	363	bool wxHtmlWindow::ScrollToAnchor(const wxString& anchor)
	364	{
	365	const wxHtmlCell *c = m_Cell->Find(wxHTML_COND_ISANCHOR, &anchor);
	366	if (!c)
	367	{
	368	wxLogWarning(_("HTML anchor %s does not exist."), anchor.c_str());
	369	return FALSE;
	370	}
	371	else
	372	{
	373	int y;
	374
	375	for (y = 0; c != NULL; c = c->GetParent()) y += c->GetPosY();
	376	Scroll(-1, y / wxHTML_SCROLL_STEP);
	377	m_OpenedAnchor = anchor;
	378	return TRUE;
	379	}
	380	}
	381
	382
	383	void wxHtmlWindow::OnSetTitle(const wxString& title)
	384	{
	385	if (m_RelatedFrame)
	386	{
	387	wxString tit;
	388	tit.Printf(m_TitleFormat, title.c_str());
	389	m_RelatedFrame->SetTitle(tit);
	390	}
	391	m_OpenedPageTitle = title;
	392	}
	393
	394
	395
	396
	397
	398	void wxHtmlWindow::CreateLayout()
	399	{
	400	int ClientWidth, ClientHeight;
	401
	402	if (!m_Cell) return;
	403
	404	if (m_Style & wxHW_SCROLLBAR_NEVER)
	405	{
	406	SetScrollbars(wxHTML_SCROLL_STEP, 1, m_Cell->GetWidth() / wxHTML_SCROLL_STEP, 0); // always off
	407	GetClientSize(&ClientWidth, &ClientHeight);
	408	m_Cell->Layout(ClientWidth);
	409	}
	410
	411	else {
	412	GetClientSize(&ClientWidth, &ClientHeight);
	413	m_Cell->Layout(ClientWidth);
	414	if (ClientHeight < m_Cell->GetHeight() + GetCharHeight())
	415	{
	416	SetScrollbars(
	417	wxHTML_SCROLL_STEP, wxHTML_SCROLL_STEP,
	418	m_Cell->GetWidth() / wxHTML_SCROLL_STEP,
	419	(m_Cell->GetHeight() + GetCharHeight()) / wxHTML_SCROLL_STEP
	420	/cheat: top-level frag is always container/);
	421	}
	422	else /* we fit into window, no need for scrollbars */
	423	{
	424	SetScrollbars(wxHTML_SCROLL_STEP, 1, m_Cell->GetWidth() / wxHTML_SCROLL_STEP, 0); // disable...
	425	GetClientSize(&ClientWidth, &ClientHeight);
	426	m_Cell->Layout(ClientWidth); // ...and relayout
	427	}
	428	}
	429	}
	430
	431
	432
	433	void wxHtmlWindow::ReadCustomization(wxConfigBase *cfg, wxString path)
	434	{
	435	wxString oldpath;
	436	wxString tmp;
	437	int p_fontsizes[7];
	438	wxString p_fff, p_ffn;
	439
	440	if (path != wxEmptyString)
	441	{
	442	oldpath = cfg->GetPath();
	443	cfg->SetPath(path);
	444	}
	445
	446	m_Borders = cfg->Read(wxT("wxHtmlWindow/Borders"), m_Borders);
	447	p_fff = cfg->Read(wxT("wxHtmlWindow/FontFaceFixed"), m_Parser->m_FontFaceFixed);
	448	p_ffn = cfg->Read(wxT("wxHtmlWindow/FontFaceNormal"), m_Parser->m_FontFaceNormal);
	449	for (int i = 0; i < 7; i++)
	450	{
	451	tmp.Printf(wxT("wxHtmlWindow/FontsSize%i"), i);
	452	p_fontsizes[i] = cfg->Read(tmp, m_Parser->m_FontsSizes[i]);
	453	}
	454	SetFonts(p_ffn, p_fff, p_fontsizes);
	455
	456	if (path != wxEmptyString)
	457	cfg->SetPath(oldpath);
	458	}
	459
	460
	461
	462	void wxHtmlWindow::WriteCustomization(wxConfigBase *cfg, wxString path)
	463	{
	464	wxString oldpath;
	465	wxString tmp;
	466
	467	if (path != wxEmptyString)
	468	{
	469	oldpath = cfg->GetPath();
	470	cfg->SetPath(path);
	471	}
	472
	473	cfg->Write(wxT("wxHtmlWindow/Borders"), (long) m_Borders);
	474	cfg->Write(wxT("wxHtmlWindow/FontFaceFixed"), m_Parser->m_FontFaceFixed);
	475	cfg->Write(wxT("wxHtmlWindow/FontFaceNormal"), m_Parser->m_FontFaceNormal);
	476	for (int i = 0; i < 7; i++)
	477	{
	478	tmp.Printf(wxT("wxHtmlWindow/FontsSize%i"), i);
	479	cfg->Write(tmp, (long) m_Parser->m_FontsSizes[i]);
	480	}
	481
	482	if (path != wxEmptyString)
	483	cfg->SetPath(oldpath);
	484	}
	485
	486
	487
	488	bool wxHtmlWindow::HistoryBack()
	489	{
	490	wxString a, l;
	491
	492	if (m_HistoryPos < 1) return FALSE;
	493
	494	// store scroll position into history item:
	495	int x, y;
	496	GetViewStart(&x, &y);
	497	(*m_History)[m_HistoryPos].SetPos(y);
	498
	499	// go to previous position:
	500	m_HistoryPos--;
	501
	502	l = (*m_History)[m_HistoryPos].GetPage();
	503	a = (*m_History)[m_HistoryPos].GetAnchor();
	504	m_HistoryOn = FALSE;
	505	m_tmpCanDrawLocks++;
	506	if (a == wxEmptyString) LoadPage(l);
	507	else LoadPage(l + wxT("#") + a);
	508	m_HistoryOn = TRUE;
	509	m_tmpCanDrawLocks--;
	510	Scroll(0, (*m_History)[m_HistoryPos].GetPos());
	511	Refresh();
	512	return TRUE;
	513	}
	514
	515	bool wxHtmlWindow::HistoryCanBack()
	516	{
	517	if (m_HistoryPos < 1) return FALSE;
	518	return TRUE ;
	519	}
	520
	521
	522	bool wxHtmlWindow::HistoryForward()
	523	{
	524	wxString a, l;
	525
	526	if (m_HistoryPos == -1) return FALSE;
	527	if (m_HistoryPos >= (int)m_History->GetCount() - 1)return FALSE;
	528
	529	m_OpenedPage = wxEmptyString; // this will disable adding new entry into history in LoadPage()
	530
	531	m_HistoryPos++;
	532	l = (*m_History)[m_HistoryPos].GetPage();
	533	a = (*m_History)[m_HistoryPos].GetAnchor();
	534	m_HistoryOn = FALSE;
	535	m_tmpCanDrawLocks++;
	536	if (a == wxEmptyString) LoadPage(l);
	537	else LoadPage(l + wxT("#") + a);
	538	m_HistoryOn = TRUE;
	539	m_tmpCanDrawLocks--;
	540	Scroll(0, (*m_History)[m_HistoryPos].GetPos());
	541	Refresh();
	542	return TRUE;
	543	}
	544
	545	bool wxHtmlWindow::HistoryCanForward()
	546	{
	547	if (m_HistoryPos == -1) return FALSE;
	548	if (m_HistoryPos >= (int)m_History->GetCount() - 1)return FALSE;
	549	return TRUE ;
	550	}
	551
	552
	553	void wxHtmlWindow::HistoryClear()
	554	{
	555	m_History->Empty();
	556	m_HistoryPos = -1;
	557	}
	558
	559	void wxHtmlWindow::AddProcessor(wxHtmlProcessor *processor)
	560	{
	561	if (!m_Processors)
	562	{
	563	m_Processors = new wxHtmlProcessorList;
	564	m_Processors->DeleteContents(TRUE);
	565	}
	566	wxHtmlProcessorList::Node *node;
	567
	568	for (node = m_Processors->GetFirst(); node; node = node->GetNext())
	569	{
	570	if (processor->GetPriority() > node->GetData()->GetPriority())
	571	{
	572	m_Processors->Insert(node, processor);
	573	return;
	574	}
	575	}
	576	m_Processors->Append(processor);
	577	}
	578
	579	/static / void wxHtmlWindow::AddGlobalProcessor(wxHtmlProcessor *processor)
	580	{
	581	if (!m_GlobalProcessors)
	582	{
	583	m_GlobalProcessors = new wxHtmlProcessorList;
	584	m_GlobalProcessors->DeleteContents(TRUE);
	585	}
	586	wxHtmlProcessorList::Node *node;
	587
	588	for (node = m_GlobalProcessors->GetFirst(); node; node = node->GetNext())
	589	{
	590	if (processor->GetPriority() > node->GetData()->GetPriority())
	591	{
	592	m_GlobalProcessors->Insert(node, processor);
	593	return;
	594	}
	595	}
	596	m_GlobalProcessors->Append(processor);
	597	}
	598
	599
	600
	601	wxList wxHtmlWindow::m_Filters;
	602	wxHtmlFilter *wxHtmlWindow::m_DefaultFilter = NULL;
	603	wxCursor *wxHtmlWindow::s_cur_hand = NULL;
	604	wxCursor *wxHtmlWindow::s_cur_arrow = NULL;
	605	wxHtmlProcessorList *wxHtmlWindow::m_GlobalProcessors = NULL;
	606
	607	void wxHtmlWindow::CleanUpStatics()
	608	{
	609	wxDELETE(m_DefaultFilter);
	610	m_Filters.DeleteContents(TRUE);
	611	m_Filters.Clear();
	612	wxDELETE(m_GlobalProcessors);
	613	wxDELETE(s_cur_hand);
	614	wxDELETE(s_cur_arrow);
	615	}
	616
	617
	618
	619	void wxHtmlWindow::AddFilter(wxHtmlFilter *filter)
	620	{
	621	m_Filters.Append(filter);
	622	}
	623
	624
	625
	626
	627	void wxHtmlWindow::OnLinkClicked(const wxHtmlLinkInfo& link)
	628	{
	629	LoadPage(link.GetHref());
	630	}
	631
	632	void wxHtmlWindow::OnCellClicked(wxHtmlCell *cell,
	633	wxCoord x, wxCoord y,
	634	const wxMouseEvent& event)
	635	{
	636	wxCHECK_RET( cell, _T("can't be called with NULL cell") );
	637
	638	cell->OnMouseClick(this, x, y, event);
	639	}
	640
	641	void wxHtmlWindow::OnCellMouseHover(wxHtmlCell * WXUNUSED(cell),
	642	wxCoord WXUNUSED(x), wxCoord WXUNUSED(y))
	643	{
	644	// do nothing here
	645	}
	646
	647	void wxHtmlWindow::OnDraw(wxDC& dc)
	648	{
	649	if (m_tmpCanDrawLocks > 0 \|\| m_Cell == NULL) return;
	650
	651	int x, y;
	652	wxRect rect = GetUpdateRegion().GetBox();
	653
	654	dc.SetMapMode(wxMM_TEXT);
	655	dc.SetBackgroundMode(wxTRANSPARENT);
	656	GetViewStart(&x, &y);
	657
	658	m_Cell->Draw(dc, 0, 0,
	659	y * wxHTML_SCROLL_STEP + rect.GetTop(),
	660	y * wxHTML_SCROLL_STEP + rect.GetBottom());
	661	}
	662
	663
	664
	665
	666	void wxHtmlWindow::OnSize(wxSizeEvent& event)
	667	{
	668	wxScrolledWindow::OnSize(event);
	669	CreateLayout();
	670	Refresh();
	671	}
	672
	673
	674	void wxHtmlWindow::OnMouseEvent(wxMouseEvent& event)
	675	{
	676	m_tmpMouseMoved = TRUE;
	677
	678	if (event.ButtonDown())
	679	{
	680	SetFocus();
	681	if ( m_Cell )
	682	{
	683	int sx, sy;
	684	GetViewStart(&sx, &sy);
	685	sx *= wxHTML_SCROLL_STEP;
	686	sy *= wxHTML_SCROLL_STEP;
	687
	688	wxPoint pos = event.GetPosition();
	689	pos.x += sx;
	690	pos.y += sy;
	691
	692	wxHtmlCell *cell = m_Cell->FindCellByPos(pos.x, pos.y);
	693
	694	// VZ: is it possible that we don't find anything at all?
	695	// VS: yes. FindCellByPos returns terminal cell and
	696	// containers may have empty borders
	697	if ( cell )
	698	OnCellClicked(cell, pos.x, pos.y, event);
	699	}
	700	}
	701	}
	702
	703
	704
	705	void wxHtmlWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
	706	{
	707	if (s_cur_hand == NULL)
	708	{
	709	s_cur_hand = new wxCursor(wxCURSOR_HAND);
	710	s_cur_arrow = new wxCursor(wxCURSOR_ARROW);
	711	}
	712
	713	if (m_tmpMouseMoved && (m_Cell != NULL))
	714	{
	715	int sx, sy;
	716	GetViewStart(&sx, &sy);
	717	sx *= wxHTML_SCROLL_STEP;
	718	sy *= wxHTML_SCROLL_STEP;
	719
	720	int x, y;
	721	wxGetMousePosition(&x, &y);
	722	ScreenToClient(&x, &y);
	723	x += sx;
	724	y += sy;
	725
	726	wxHtmlCell *cell = m_Cell->FindCellByPos(x, y);
	727	if ( cell != m_tmpLastCell )
	728	{
	729	wxHtmlLinkInfo *lnk = cell ? cell->GetLink(x, y) : NULL;
	730
	731	if (lnk != m_tmpLastLink)
	732	{
	733	if (lnk == NULL)
	734	{
	735	SetCursor(*s_cur_arrow);
	736	if (m_RelatedStatusBar != -1)
	737	m_RelatedFrame->SetStatusText(wxEmptyString, m_RelatedStatusBar);
	738	}
	739	else
	740	{
	741	SetCursor(*s_cur_hand);
	742	if (m_RelatedStatusBar != -1)
	743	m_RelatedFrame->SetStatusText(lnk->GetHref(), m_RelatedStatusBar);
	744	}
	745	m_tmpLastLink = lnk;
	746	}
	747
	748	m_tmpLastCell = cell;
	749	}
	750	else // mouse moved but stayed in the same cell
	751	{
	752	if ( cell )
	753	OnCellMouseHover(cell, x, y);
	754	}
	755
	756	m_tmpMouseMoved = FALSE;
	757	}
	758	}
	759
	760
	761	IMPLEMENT_ABSTRACT_CLASS(wxHtmlProcessor,wxObject)
	762
	763	IMPLEMENT_DYNAMIC_CLASS(wxHtmlWindow,wxScrolledWindow)
	764
	765	BEGIN_EVENT_TABLE(wxHtmlWindow, wxScrolledWindow)
	766	EVT_SIZE(wxHtmlWindow::OnSize)
	767	EVT_LEFT_DOWN(wxHtmlWindow::OnMouseEvent)
	768	EVT_RIGHT_DOWN(wxHtmlWindow::OnMouseEvent)
	769	EVT_MOTION(wxHtmlWindow::OnMouseEvent)
	770	EVT_IDLE(wxHtmlWindow::OnIdle)
	771	END_EVENT_TABLE()
	772
	773
	774
	775
	776
	777	// A module to allow initialization/cleanup
	778	// without calling these functions from app.cpp or from
	779	// the user's application.
	780
	781	class wxHtmlWinModule: public wxModule
	782	{
	783	DECLARE_DYNAMIC_CLASS(wxHtmlWinModule)
	784	public:
	785	wxHtmlWinModule() : wxModule() {}
	786	bool OnInit() { return TRUE; }
	787	void OnExit() { wxHtmlWindow::CleanUpStatics(); }
	788	};
	789
	790	IMPLEMENT_DYNAMIC_CLASS(wxHtmlWinModule, wxModule)
	791
	792
	793	// This hack forces the linker to always link in m_* files
	794	// (wxHTML doesn't work without handlers from these files)
	795	#include "wx/html/forcelnk.h"
	796	FORCE_WXHTML_MODULES()
	797
	798	#endif