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htmlwin.cpp
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2002-11-09
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/////////////////////////////////////////////////////////////////////////////
// Name: htmlwin.cpp
// Purpose: wxHtmlWindow class for parsing & displaying HTML (implementation)
// Author: Vaclav Slavik
// RCS-ID: $Id: htmlwin.cpp,v 1.62.2.1 2002/11/04 22:46:22 VZ Exp $
// 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);
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::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()
{
delete m_DefaultFilter;
m_DefaultFilter = NULL;
m_Filters.DeleteContents(TRUE);
m_Filters.Clear();
delete m_GlobalProcessors;
m_GlobalProcessors = NULL;
delete s_cur_hand;
delete 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