src/html/htmlwin.cpp

   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
  13 #endif
  14
  15 #include <wx/wxprec.h>
  16
  17 #include "wx/defs.h"
  18 #if wxUSE_HTML
  19
  20 #ifdef __BORDLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WXPRECOMP
  25 #include <wx/wx.h>
  26 #endif
  27
  28 #include "wx/html/htmlwin.h"
  29
  30 #include "wx/html/forcelnk.h"
  31
  32
  33
  34 //-----------------------------------------------------------------------------
  35 // wxHtmlWindow
  36 //-----------------------------------------------------------------------------
  37
  38
  39
  40 #include <wx/arrimpl.cpp>
  41 WX_DEFINE_OBJARRAY(HtmlHistoryArray)
  42
  43
  44 wxHtmlWindow::wxHtmlWindow(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size,
  45                 long style, const wxString& name) : wxScrolledWindow(parent, id, pos, size, wxVSCROLL, name)
  46 {
  47     m_tmpMouseMoved = FALSE;
  48     m_tmpLastLink = wxEmptyString;
  49     m_tmpCanDraw = TRUE;
  50     m_FS = new wxFileSystem();
  51     m_RelatedStatusBar = -1;
  52     m_RelatedFrame = NULL;
  53     m_TitleFormat = "%s";
  54     m_OpenedPage = m_OpenedAnchor = wxEmptyString;
  55     m_Cell = NULL;
  56     m_Parser = new wxHtmlWinParser(this);
  57     m_Parser -> SetFS(m_FS);
  58     SetBorders(10);
  59     m_HistoryPos = -1;
  60     m_HistoryOn = TRUE;
  61     m_Style = style;
  62     SetPage("<html><body></body></html>");
  63 }
  64
  65
  66
  67 wxHtmlWindow::~wxHtmlWindow()
  68 {
  69     HistoryClear();
  70
  71     if (m_Cell) delete m_Cell;
  72
  73     wxList *parser_data = m_Parser -> GetTempData();
  74     if (parser_data) delete parser_data;
  75
  76     delete m_Parser;
  77     delete m_FS;
  78 }
  79
  80
  81
  82 void wxHtmlWindow::SetRelatedFrame(wxFrame* frame, const wxString& format)
  83 {
  84     m_RelatedFrame = frame;
  85     m_TitleFormat = format;
  86 }
  87
  88
  89
  90 void wxHtmlWindow::SetRelatedStatusBar(int bar)
  91 {
  92     m_RelatedStatusBar = bar;
  93 }
  94
  95
  96
  97 void wxHtmlWindow::SetFonts(wxString normal_face, int normal_italic_mode, wxString fixed_face, int fixed_italic_mode, const int *sizes)
  98 {
  99     m_Parser -> SetFonts(normal_face, normal_italic_mode, fixed_face, fixed_italic_mode, sizes);
 100     if (!m_OpenedPage.IsEmpty()) LoadPage(m_OpenedPage);
 101 }
 102
 103
 104
 105 bool wxHtmlWindow::SetPage(const wxString& source)
 106 {
 107     wxClientDC *dc = new wxClientDC(this);
 108
 109     dc -> SetMapMode(wxMM_TEXT);
 110     SetBackgroundColour(wxColour(0xFF, 0xFF, 0xFF));
 111     m_OpenedPage = m_OpenedAnchor = wxEmptyString;
 112     m_Parser -> SetDC(dc);
 113     if (m_Cell) {
 114       delete m_Cell;
 115       m_Cell = NULL;
 116     }
 117     m_Cell = (wxHtmlContainerCell*) m_Parser -> Parse(source);
 118     delete dc;
 119     m_Cell -> SetIndent(m_Borders, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
 120     m_Cell -> SetAlignHor(wxHTML_ALIGN_CENTER);
 121     CreateLayout();
 122     Refresh();
 123     return TRUE;
 124 }
 125
 126
 127 bool wxHtmlWindow::LoadPage(const wxString& location)
 128 {
 129     wxFSFile *f;
 130     bool rt_val;
 131     wxBusyCursor b;
 132
 133     m_tmpCanDraw = FALSE;
 134     if (m_HistoryOn && (m_HistoryPos != -1)) { // store scroll position into history item
 135         int x, y;
 136         ViewStart(&x, &y);
 137         m_History[m_HistoryPos].SetPos(y);
 138     }
 139
 140     if (location[0] == '#') { // local anchor
 141         wxString anch = location.Mid(1) /*1 to end*/;
 142         m_tmpCanDraw = TRUE;
 143         rt_val = ScrollToAnchor(anch);
 144     }
 145
 146     else {
 147         // load&display it:
 148         if (m_RelatedStatusBar != -1) {
 149             m_RelatedFrame -> SetStatusText(_("Connecting..."), m_RelatedStatusBar);
 150             Refresh();
 151         }
 152
 153         f = m_FS -> OpenFile(location);
 154         if (f == NULL) {
 155             wxString err;
 156
 157             err.Printf(_("The browser is unable to open requested location :\n\n%s"), WXSTRINGCAST location);
 158             m_tmpCanDraw = TRUE;
 159             Refresh();
 160             wxMessageBox(err, "Error");
 161             return FALSE;
 162         }
 163
 164         else {
 165             wxNode *node;
 166             wxString src = wxEmptyString;
 167
 168             if (m_RelatedStatusBar != -1) {
 169                 wxString msg = _("Loading : ") + location;
 170                 m_RelatedFrame -> SetStatusText(msg, m_RelatedStatusBar);
 171                 Refresh();
 172             }
 173
 174             node = m_Filters.GetFirst();
 175             while (node){
 176                 wxHtmlFilter *h = (wxHtmlFilter*) node -> GetData();
 177                 if (h -> CanRead(*f)) {
 178                     src = h -> ReadFile(*f);
 179                     break;
 180                 }
 181                 node = node -> GetNext();
 182             }
 183             if (src == wxEmptyString) {
 184                 if (m_DefaultFilter == NULL) m_DefaultFilter = GetDefaultFilter();
 185                 src = m_DefaultFilter -> ReadFile(*f);
 186             }
 187
 188             m_FS -> ChangePathTo(f -> GetLocation());
 189             rt_val = SetPage(src);
 190             m_OpenedPage = f -> GetLocation();
 191             if (f -> GetAnchor() != wxEmptyString) {
 192                 m_tmpCanDraw = TRUE;
 193                 ScrollToAnchor(f -> GetAnchor());
 194                 m_tmpCanDraw = FALSE;
 195             }
 196
 197             delete f;
 198
 199             if (m_RelatedStatusBar != -1) m_RelatedFrame -> SetStatusText(_("Done"), m_RelatedStatusBar);
 200         }
 201     }
 202
 203     if (m_HistoryOn) { // add this page to history there:
 204         int c = m_History.GetCount() - (m_HistoryPos + 1);
 205
 206         m_HistoryPos++;
 207         for (int i = 0; i < c; i++)
 208             m_History.Remove(m_HistoryPos);
 209         m_History.Add(new HtmlHistoryItem(m_OpenedPage, m_OpenedAnchor));
 210     }
 211
 212     m_tmpCanDraw = TRUE;
 213     Refresh();
 214     return rt_val;
 215 }
 216
 217
 218
 219 bool wxHtmlWindow::ScrollToAnchor(const wxString& anchor)
 220 {
 221     const wxHtmlCell *c = m_Cell -> Find(wxHTML_COND_ISANCHOR, &anchor);
 222     if (!c) return FALSE;
 223     else {
 224         int y;
 225
 226         for (y = 0; c != NULL; c = c -> GetParent()) y += c -> GetPosY();
 227         Scroll(-1, y / wxHTML_SCROLL_STEP);
 228         m_OpenedAnchor = anchor;
 229         return TRUE;
 230     }
 231 }
 232
 233
 234 void wxHtmlWindow::SetTitle(const wxString& title)
 235 {
 236     if (m_RelatedFrame) {
 237         wxString tit;
 238         tit.Printf(m_TitleFormat, title.c_str());
 239         m_RelatedFrame -> SetTitle(tit);
 240     }
 241 }
 242
 243
 244
 245
 246
 247 void wxHtmlWindow::CreateLayout()
 248 {
 249     int ClientWidth, ClientHeight;
 250
 251     if (!m_Cell) return;
 252
 253     if (m_Style == wxHW_SCROLLBAR_NEVER) {
 254         SetScrollbars(1, 1, 0, 0); // always off
 255         GetClientSize(&ClientWidth, &ClientHeight);
 256         m_Cell -> Layout(ClientWidth);
 257     }
 258
 259     else {
 260         GetClientSize(&ClientWidth, &ClientHeight);
 261 #ifndef __WXMSW__
 262         // VS : this looks extremely ugly under windoze, better fix needed!
 263         SetScrollbars(1, 1, 0, ClientHeight * 2); // always on
 264 #endif
 265         GetClientSize(&ClientWidth, &ClientHeight);
 266         m_Cell -> Layout(ClientWidth);
 267         if (ClientHeight < m_Cell -> GetHeight()) {
 268             SetScrollbars(wxHTML_SCROLL_STEP, wxHTML_SCROLL_STEP,
 269                           m_Cell -> GetWidth() / wxHTML_SCROLL_STEP,
 270                           m_Cell -> GetHeight() / wxHTML_SCROLL_STEP
 271                           /*cheat: top-level frag is always container*/);
 272         }
 273             else { /* we fit into window, no need for scrollbars */
 274                 SetScrollbars(1, 1, 0, 0); // disable...
 275                 GetClientSize(&ClientWidth, &ClientHeight);
 276                 m_Cell -> Layout(ClientWidth); // ...and relayout
 277             }
 278     }
 279 }
 280
 281
 282
 283 void wxHtmlWindow::ReadCustomization(wxConfigBase *cfg, wxString path)
 284 {
 285     wxString oldpath;
 286     wxString tmp;
 287
 288     if (path != wxEmptyString) {
 289         oldpath = cfg -> GetPath();
 290         cfg -> SetPath(path);
 291     }
 292
 293     m_Borders = cfg -> Read("wxHtmlWindow/Borders", m_Borders);
 294     m_Parser -> m_FontFaceFixed = cfg -> Read("wxHtmlWindow/FontFaceFixed", m_Parser -> m_FontFaceFixed);
 295     m_Parser -> m_FontFaceNormal = cfg -> Read("wxHtmlWindow/FontFaceNormal", m_Parser -> m_FontFaceNormal);
 296     m_Parser -> m_ItalicModeFixed = cfg -> Read("wxHtmlWindow/ItalicModeFixed", m_Parser -> m_ItalicModeFixed);
 297     m_Parser -> m_ItalicModeNormal = cfg -> Read("wxHtmlWindow/ItalicModeNormal", m_Parser -> m_ItalicModeNormal);
 298     for (int i = 0; i < 7; i++) {
 299         tmp.Printf("wxHtmlWindow/FontsSize%i", i);
 300         m_Parser -> m_FontsSizes[i] = cfg -> Read(tmp, m_Parser -> m_FontsSizes[i]);
 301     }
 302
 303     if (path != wxEmptyString)
 304         cfg -> SetPath(oldpath);
 305 }
 306
 307
 308
 309 void wxHtmlWindow::WriteCustomization(wxConfigBase *cfg, wxString path)
 310 {
 311     wxString oldpath;
 312     wxString tmp;
 313
 314     if (path != wxEmptyString) {
 315         oldpath = cfg -> GetPath();
 316         cfg -> SetPath(path);
 317     }
 318
 319     cfg -> Write("wxHtmlWindow/Borders", (long) m_Borders);
 320     cfg -> Write("wxHtmlWindow/FontFaceFixed", m_Parser -> m_FontFaceFixed);
 321     cfg -> Write("wxHtmlWindow/FontFaceNormal", m_Parser -> m_FontFaceNormal);
 322     cfg -> Write("wxHtmlWindow/ItalicModeFixed", (long) m_Parser -> m_ItalicModeFixed);
 323     cfg -> Write("wxHtmlWindow/ItalicModeNormal", (long) m_Parser -> m_ItalicModeNormal);
 324     for (int i = 0; i < 7; i++) {
 325         tmp.Printf("wxHtmlWindow/FontsSize%i", i);
 326         cfg -> Write(tmp, (long) m_Parser -> m_FontsSizes[i]);
 327     }
 328
 329     if (path != wxEmptyString)
 330         cfg -> SetPath(oldpath);
 331 }
 332
 333
 334
 335 bool wxHtmlWindow::HistoryBack()
 336 {
 337     wxString a, l;
 338
 339     if (m_HistoryPos < 1) return FALSE;
 340
 341     m_HistoryPos--;
 342
 343     l = m_History[m_HistoryPos].GetPage();
 344     a = m_History[m_HistoryPos].GetAnchor();
 345     m_HistoryOn = FALSE;
 346     if (a == wxEmptyString) LoadPage(l);
 347     else LoadPage(l + "#" + a);
 348     m_HistoryOn = TRUE;
 349     Scroll(0, m_History[m_HistoryPos].GetPos());
 350     Refresh();
 351     return TRUE;
 352 }
 353
 354
 355
 356 bool wxHtmlWindow::HistoryForward()
 357 {
 358     wxString a, l;
 359
 360     if (m_HistoryPos == -1) return FALSE;
 361     if (m_HistoryPos >= (int)m_History.GetCount() - 1)return FALSE;
 362
 363     m_OpenedPage = wxEmptyString; // this will disable adding new entry into history in LoadPage()
 364
 365     m_HistoryPos++;
 366     l = m_History[m_HistoryPos].GetPage();
 367     a = m_History[m_HistoryPos].GetAnchor();
 368     m_HistoryOn = FALSE;
 369     if (a == wxEmptyString) LoadPage(l);
 370     else LoadPage(l + "#" + a);
 371     m_HistoryOn = TRUE;
 372     Scroll(0, m_History[m_HistoryPos].GetPos());
 373     Refresh();
 374     return TRUE;
 375 }
 376
 377
 378
 379 void wxHtmlWindow::HistoryClear()
 380 {
 381     m_History.Empty();
 382     m_HistoryPos = -1;
 383 }
 384
 385
 386
 387 wxList wxHtmlWindow::m_Filters;
 388 wxHtmlFilter *wxHtmlWindow::m_DefaultFilter = NULL;
 389
 390 void wxHtmlWindow::CleanUpStatics()
 391 {
 392     if (m_DefaultFilter) delete m_DefaultFilter;
 393     m_DefaultFilter = NULL;
 394     m_Filters.DeleteContents(TRUE);
 395     m_Filters.Clear();
 396
 397 }
 398
 399
 400
 401 void wxHtmlWindow::AddFilter(wxHtmlFilter *filter)
 402 {
 403     m_Filters.Append(filter);
 404 }
 405
 406
 407
 408
 409 void wxHtmlWindow::OnLinkClicked(const wxString& link)
 410 {
 411     LoadPage(link);
 412 }
 413
 414
 415
 416 void wxHtmlWindow::OnDraw(wxDC& dc)
 417 {
 418     int x, y;
 419     wxRegionIterator upd(GetUpdateRegion()); // get the update rect list
 420     int v_y, v_h;
 421
 422     if (!m_tmpCanDraw) return;
 423     dc.SetMapMode(wxMM_TEXT);
 424 #if defined(_MSC_VER) && (_MSC_VER == 1200)
 425     ::SetMapMode((HDC)dc.GetHDC(), MM_TEXT);
 426 #endif
 427     dc.SetBackgroundMode(wxTRANSPARENT);
 428     ViewStart(&x, &y);
 429
 430     while (upd) {
 431         v_y = upd.GetY();
 432         v_h = upd.GetH();
 433         if (m_Cell) m_Cell -> Draw(dc, 0, 0, y * wxHTML_SCROLL_STEP + v_y, y * wxHTML_SCROLL_STEP + v_h + v_y);
 434         upd++;
 435     }
 436 }
 437
 438
 439
 440
 441 void wxHtmlWindow::OnSize(wxSizeEvent& event)
 442 {
 443     wxScrolledWindow::OnSize(event);
 444     CreateLayout();
 445 }
 446
 447
 448
 449 void wxHtmlWindow::OnKeyDown(wxKeyEvent& event)
 450 {
 451     int dummy;
 452     int sty, szy, cliy;
 453
 454     ViewStart(&dummy, &sty);
 455     GetClientSize(&dummy, &cliy); cliy /= wxHTML_SCROLL_STEP;
 456     GetVirtualSize(&dummy, &szy); szy /= wxHTML_SCROLL_STEP;
 457
 458     switch (event.KeyCode()) {
 459         case WXK_PAGEUP :
 460     case WXK_PRIOR :
 461                 Scroll(-1, sty - cliy);
 462                 break;
 463         case WXK_PAGEDOWN :
 464     case WXK_NEXT :
 465                 Scroll(-1, sty + cliy);
 466                 break;
 467         case WXK_HOME :
 468                 Scroll(-1, 0);
 469                 break;
 470         case WXK_END :
 471                 Scroll(-1, szy - cliy);
 472                 break;
 473         case WXK_UP :
 474                 Scroll(-1, sty - 1);
 475                 break;
 476         case WXK_DOWN :
 477                 Scroll(-1, sty + 1);
 478                 break;
 479     }
 480 }
 481
 482
 483
 484 void wxHtmlWindow::OnMouseEvent(wxMouseEvent& event)
 485 {
 486     m_tmpMouseMoved = TRUE;
 487
 488     if (event.ButtonDown()) {
 489         int sx, sy;
 490         wxPoint pos;
 491         wxString lnk;
 492
 493         ViewStart(&sx, &sy); sx *= wxHTML_SCROLL_STEP; sy *= wxHTML_SCROLL_STEP;
 494         pos = event.GetPosition();
 495
 496         if (m_Cell)
 497             m_Cell -> OnMouseClick(this, sx + pos.x, sy + pos.y, event.ButtonDown(1), event.ButtonDown(2), event.ButtonDown(3));
 498     }
 499 }
 500
 501
 502
 503 void wxHtmlWindow::OnIdle(wxIdleEvent& event)
 504 {
 505     static wxCursor cur_hand(wxCURSOR_HAND), cur_arrow(wxCURSOR_ARROW);
 506
 507     if (m_tmpMouseMoved && (m_Cell != NULL)) {
 508         int sx, sy;
 509         int x, y;
 510         wxString lnk;
 511
 512         ViewStart(&sx, &sy); sx *= wxHTML_SCROLL_STEP; sy *= wxHTML_SCROLL_STEP;
 513         wxGetMousePosition(&x, &y);
 514         ScreenToClient(&x, &y);
 515         lnk = m_Cell -> GetLink(sx + x, sy + y);
 516
 517         if (lnk != m_tmpLastLink) {
 518             if (lnk == wxEmptyString) {
 519                 SetCursor(cur_arrow);
 520                 if (m_RelatedStatusBar != -1) m_RelatedFrame -> SetStatusText(wxEmptyString, m_RelatedStatusBar);
 521             }
 522             else {
 523                 SetCursor(cur_hand);
 524                 if (m_RelatedStatusBar != -1) m_RelatedFrame -> SetStatusText(lnk, m_RelatedStatusBar);
 525             }
 526             m_tmpLastLink = lnk;
 527         }
 528         m_tmpMouseMoved = FALSE;
 529     }
 530 }
 531
 532
 533
 534
 535 IMPLEMENT_DYNAMIC_CLASS(wxHtmlWindow,wxScrolledWindow)
 536
 537 BEGIN_EVENT_TABLE(wxHtmlWindow, wxScrolledWindow)
 538     EVT_SIZE(wxHtmlWindow::OnSize)
 539     EVT_LEFT_DOWN(wxHtmlWindow::OnMouseEvent)
 540     EVT_MOTION(wxHtmlWindow::OnMouseEvent)
 541     EVT_IDLE(wxHtmlWindow::OnIdle)
 542     EVT_KEY_DOWN(wxHtmlWindow::OnKeyDown)
 543 END_EVENT_TABLE()
 544
 545
 546
 547
 548
 549 // A module to allow initialization/cleanup
 550 // without calling these functions from app.cpp or from
 551 // the user's application.
 552
 553 class wxHtmlWinModule: public wxModule
 554 {
 555 DECLARE_DYNAMIC_CLASS(wxHtmlWinModule)
 556 public:
 557     wxHtmlWinModule() : wxModule() {}
 558     bool OnInit() { return TRUE; }
 559     void OnExit() { wxHtmlWindow::CleanUpStatics(); }
 560 };
 561
 562 IMPLEMENT_DYNAMIC_CLASS(wxHtmlWinModule, wxModule)
 563
 564
 565
 566
 567 ///// default mod handlers are forced there:
 568
 569 FORCE_LINK(mod_layout)
 570 FORCE_LINK(mod_fonts)
 571 FORCE_LINK(mod_image)
 572 FORCE_LINK(mod_list)
 573 FORCE_LINK(mod_pre)
 574 FORCE_LINK(mod_hline)
 575 FORCE_LINK(mod_links)
 576 FORCE_LINK(mod_tables)
 577
 578
 579 #endif