src/html/htmlwin.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlwin.cpp
   3 // Purpose:     wxHtmlWindow class for parsing & displaying HTML (implementation)
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9
  10 #ifdef __GNUG__
  11 #pragma implementation
  12 #endif
  13
  14 #include <wx/wxprec.h>
  15
  16 #include "wx/defs.h"
  17 #if wxUSE_HTML
  18
  19 #ifdef __BORDLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WXPRECOMP
  24 #include <wx/wx.h>
  25 #endif
  26
  27 #include <wx/html/htmlwin.h>
  28
  29 #include <wx/html/forcelink.h>
  30
  31
  32
  33 //-----------------------------------------------------------------------------
  34 // wxHtmlWindow
  35 //-----------------------------------------------------------------------------
  36
  37
  38
  39 #include <wx/arrimpl.cpp>
  40 WX_DEFINE_OBJARRAY(HtmlHistoryArray)
  41
  42
  43 wxHtmlWindow::wxHtmlWindow(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size,
  44                 long style, const wxString& name) : wxScrolledWindow(parent, id, pos, size, wxVSCROLL, name)
  45 {
  46     m_tmpMouseMoved = FALSE;
  47     m_tmpCanDraw = TRUE;
  48     m_FS = new wxFileSystem();
  49     m_RelatedStatusBar = -1;
  50     m_RelatedFrame = NULL;
  51     m_TitleFormat = "%s";
  52     m_OpenedPage = m_OpenedAnchor = wxEmptyString;
  53     m_Cell = NULL;
  54     m_Parser = new wxHtmlWinParser(this);
  55     m_Parser -> SetFS(m_FS);
  56     SetBorders(10);
  57     m_HistoryPos = -1;
  58     m_HistoryOn = TRUE;
  59     m_Style = style;
  60     SetPage("<html><body></body></html>");
  61 }
  62
  63
  64
  65 wxHtmlWindow::~wxHtmlWindow()
  66 {
  67     HistoryClear();
  68
  69     if (m_Cell) delete m_Cell;
  70
  71     wxList *parser_data = m_Parser -> GetTempData();
  72     if (parser_data) delete parser_data;
  73
  74     delete m_Parser;
  75     delete m_FS;
  76 }
  77
  78
  79
  80 void wxHtmlWindow::SetRelatedFrame(wxFrame* frame, const wxString& format)
  81 {
  82     m_RelatedFrame = frame;
  83     m_TitleFormat = format;
  84 }
  85
  86
  87
  88 void wxHtmlWindow::SetRelatedStatusBar(int bar)
  89 {
  90     m_RelatedStatusBar = bar;
  91 }
  92
  93
  94
  95 void wxHtmlWindow::SetFonts(wxString normal_face, int normal_italic_mode, wxString fixed_face, int fixed_italic_mode, int *sizes)
  96 {
  97     m_Parser -> SetFonts(normal_face, normal_italic_mode, fixed_face, fixed_italic_mode, sizes);
  98     if (!m_OpenedPage.IsEmpty()) LoadPage(m_OpenedPage);
  99 }
 100
 101
 102
 103 bool wxHtmlWindow::SetPage(const wxString& source)
 104 {
 105     wxClientDC *dc = new wxClientDC(this);
 106
 107     dc -> SetMapMode(wxMM_TEXT);
 108     SetBackgroundColour(wxColour(0xFF, 0xFF, 0xFF));
 109     m_OpenedPage = m_OpenedAnchor = wxEmptyString;
 110     m_Parser -> SetDC(dc);
 111     if (m_Cell) {
 112       delete m_Cell;
 113       m_Cell = NULL;
 114     }
 115     m_Cell = (wxHtmlContainerCell*) m_Parser -> Parse(source);
 116     delete dc;
 117     m_Cell -> SetIndent(m_Borders, HTML_INDENT_ALL, HTML_UNITS_PIXELS);
 118     m_Cell -> SetAlignHor(HTML_ALIGN_CENTER);
 119     CreateLayout();
 120     Refresh();
 121     return TRUE;
 122 }
 123
 124
 125 bool wxHtmlWindow::LoadPage(const wxString& location)
 126 {
 127     wxFSFile *f;
 128     bool rt_val;
 129     wxBusyCursor b;
 130
 131     m_tmpCanDraw = FALSE;
 132     if (m_HistoryOn && (m_HistoryPos != -1)) { // store scroll position into history item
 133         int x, y;
 134         ViewStart(&x, &y);
 135         m_History[m_HistoryPos].SetPos(y);
 136     }
 137
 138     if (location[0] == '#') { // local anchor
 139         wxString anch = location.Mid(1) /*1 to end*/;
 140         m_tmpCanDraw = TRUE;
 141         rt_val = ScrollToAnchor(anch);
 142     }
 143
 144     else {
 145         // load&display it:
 146         if (m_RelatedStatusBar != -1) {
 147             m_RelatedFrame -> SetStatusText(_("Connecting..."), m_RelatedStatusBar);
 148             Refresh();
 149         }
 150
 151         f = m_FS -> OpenFile(location);
 152         if (f == NULL) {
 153             wxString err;
 154
 155             err.Printf(_("The browser is unable to open requested location :\n\n%s"), WXSTRINGCAST location);
 156             m_tmpCanDraw = TRUE;
 157             Refresh();
 158             wxMessageBox(err, "Error");
 159             return FALSE;
 160         }
 161
 162         else {
 163             wxNode *node;
 164             wxString src = wxEmptyString;
 165
 166             if (m_RelatedStatusBar != -1) {
 167                 wxString msg = _("Loading : ") + location;
 168                 m_RelatedFrame -> SetStatusText(msg, m_RelatedStatusBar);
 169                 Refresh();
 170             }
 171
 172             node = m_Filters.GetFirst();
 173             while (node){
 174                 wxHtmlFilter *h = (wxHtmlFilter*) node -> GetData();
 175                 if (h -> CanRead(*f)) {
 176                     src = h -> ReadFile(*f);
 177                     break;
 178                 }
 179                 node = node -> GetNext();
 180             }
 181             if (src == wxEmptyString) {
 182                 if (m_DefaultFilter == NULL) m_DefaultFilter = GetDefaultFilter();
 183                 src = m_DefaultFilter -> ReadFile(*f);
 184             }
 185
 186             m_FS -> ChangePathTo(f -> GetLocation());
 187             rt_val = SetPage(src);
 188             m_OpenedPage = f -> GetLocation();
 189             if (f -> GetAnchor() != wxEmptyString) {
 190                 m_tmpCanDraw = TRUE;
 191                 ScrollToAnchor(f -> GetAnchor());
 192                 m_tmpCanDraw = FALSE;
 193             }
 194
 195             delete f;
 196
 197             if (m_RelatedStatusBar != -1) m_RelatedFrame -> SetStatusText(_("Done"), m_RelatedStatusBar);
 198         }
 199     }
 200
 201     if (m_HistoryOn) { // add this page to history there:
 202         int c = m_History.GetCount() - (m_HistoryPos + 1);
 203
 204         m_HistoryPos++;
 205         for (int i = 0; i < c; i++)
 206             m_History.Remove(m_HistoryPos);
 207         m_History.Add(new HtmlHistoryItem(m_OpenedPage, m_OpenedAnchor));
 208     }
 209
 210     m_tmpCanDraw = TRUE;
 211     Refresh();
 212     return rt_val;
 213 }
 214
 215
 216
 217 bool wxHtmlWindow::ScrollToAnchor(const wxString& anchor)
 218 {
 219     const wxHtmlCell *c = m_Cell -> Find(HTML_COND_ISANCHOR, &anchor);
 220     if (!c) return FALSE;
 221     else {
 222         int y;
 223
 224         for (y = 0; c != NULL; c = c -> GetParent()) y += c -> GetPosY();
 225         Scroll(-1, y / HTML_SCROLL_STEP);
 226         m_OpenedAnchor = anchor;
 227         return TRUE;
 228     }
 229 }
 230
 231
 232 void wxHtmlWindow::SetTitle(const wxString& title)
 233 {
 234     if (m_RelatedFrame) {
 235         wxString tit;
 236         tit.Printf(m_TitleFormat, title.c_str());
 237         m_RelatedFrame -> SetTitle(tit);
 238     }
 239 }
 240
 241
 242
 243
 244
 245 void wxHtmlWindow::CreateLayout()
 246 {
 247     int ClientWidth, ClientHeight;
 248
 249     if (!m_Cell) return;
 250
 251     if (m_Style == wxHW_SCROLLBAR_NEVER) {
 252         SetScrollbars(1, 1, 0, 0); // always off
 253         GetClientSize(&ClientWidth, &ClientHeight);
 254         m_Cell -> Layout(ClientWidth);
 255     }
 256
 257     else {
 258         GetClientSize(&ClientWidth, &ClientHeight);
 259         SetScrollbars(1, 1, 0, ClientHeight * 2); // always on
 260         GetClientSize(&ClientWidth, &ClientHeight);
 261         m_Cell -> Layout(ClientWidth);
 262         if (ClientHeight < m_Cell -> GetHeight()) {
 263             SetScrollbars(HTML_SCROLL_STEP, HTML_SCROLL_STEP,
 264                           m_Cell -> GetWidth() / HTML_SCROLL_STEP,
 265                           m_Cell -> GetHeight() / HTML_SCROLL_STEP
 266                           /*cheat: top-level frag is always container*/);
 267         }
 268             else { /* we fit into window, no need for scrollbars */
 269                 SetScrollbars(1, 1, 0, 0); // disable...
 270                 m_Cell -> Layout(ClientWidth); // ...and relayout
 271             }
 272     }
 273 }
 274
 275
 276
 277 void wxHtmlWindow::ReadCustomization(wxConfigBase *cfg, wxString path)
 278 {
 279     wxString oldpath;
 280     wxString tmp;
 281
 282     if (path != wxEmptyString) {
 283         oldpath = cfg -> GetPath();
 284         cfg -> SetPath(path);
 285     }
 286
 287     m_Borders = cfg -> Read("wxHtmlWindow/Borders", m_Borders);
 288     m_Parser -> m_FontFaceFixed = cfg -> Read("wxHtmlWindow/FontFaceFixed", m_Parser -> m_FontFaceFixed);
 289     m_Parser -> m_FontFaceNormal = cfg -> Read("wxHtmlWindow/FontFaceNormal", m_Parser -> m_FontFaceNormal);
 290     m_Parser -> m_ItalicModeFixed = cfg -> Read("wxHtmlWindow/ItalicModeFixed", m_Parser -> m_ItalicModeFixed);
 291     m_Parser -> m_ItalicModeNormal = cfg -> Read("wxHtmlWindow/ItalicModeNormal", m_Parser -> m_ItalicModeNormal);
 292     for (int i = 0; i < 7; i++) {
 293         tmp.Printf("wxHtmlWindow/FontsSize%i", i);
 294         m_Parser -> m_FontsSizes[i] = cfg -> Read(tmp, m_Parser -> m_FontsSizes[i]);
 295     }
 296
 297     if (path != wxEmptyString)
 298         cfg -> SetPath(oldpath);
 299 }
 300
 301
 302
 303 void wxHtmlWindow::WriteCustomization(wxConfigBase *cfg, wxString path)
 304 {
 305     wxString oldpath;
 306     wxString tmp;
 307
 308     if (path != wxEmptyString) {
 309         oldpath = cfg -> GetPath();
 310         cfg -> SetPath(path);
 311     }
 312
 313     cfg -> Write("wxHtmlWindow/Borders", (long) m_Borders);
 314     cfg -> Write("wxHtmlWindow/FontFaceFixed", m_Parser -> m_FontFaceFixed);
 315     cfg -> Write("wxHtmlWindow/FontFaceNormal", m_Parser -> m_FontFaceNormal);
 316     cfg -> Write("wxHtmlWindow/ItalicModeFixed", (long) m_Parser -> m_ItalicModeFixed);
 317     cfg -> Write("wxHtmlWindow/ItalicModeNormal", (long) m_Parser -> m_ItalicModeNormal);
 318     for (int i = 0; i < 7; i++) {
 319         tmp.Printf("wxHtmlWindow/FontsSize%i", i);
 320         cfg -> Write(tmp, (long) m_Parser -> m_FontsSizes[i]);
 321     }
 322
 323     if (path != wxEmptyString)
 324         cfg -> SetPath(oldpath);
 325 }
 326
 327
 328
 329 bool wxHtmlWindow::HistoryBack()
 330 {
 331     wxString a, l;
 332
 333     if (m_HistoryPos < 1) return FALSE;
 334
 335     m_HistoryPos--;
 336
 337     l = m_History[m_HistoryPos].GetPage();
 338     a = m_History[m_HistoryPos].GetAnchor();
 339     m_HistoryOn = FALSE;
 340     if (a == wxEmptyString) LoadPage(l);
 341     else LoadPage(l + "#" + a);
 342     m_HistoryOn = TRUE;
 343     Scroll(0, m_History[m_HistoryPos].GetPos());
 344     Refresh();
 345     return TRUE;
 346 }
 347
 348
 349
 350 bool wxHtmlWindow::HistoryForward()
 351 {
 352     wxString a, l;
 353
 354     if (m_HistoryPos == -1) return FALSE;
 355     if (m_HistoryPos >= (int)m_History.GetCount() - 1)return FALSE;
 356
 357     m_OpenedPage = wxEmptyString; // this will disable adding new entry into history in LoadPage()
 358
 359     m_HistoryPos++;
 360     l = m_History[m_HistoryPos].GetPage();
 361     a = m_History[m_HistoryPos].GetAnchor();
 362     m_HistoryOn = FALSE;
 363     if (a == wxEmptyString) LoadPage(l);
 364     else LoadPage(l + "#" + a);
 365     m_HistoryOn = TRUE;
 366     Scroll(0, m_History[m_HistoryPos].GetPos());
 367     Refresh();
 368     return TRUE;
 369 }
 370
 371
 372
 373 void wxHtmlWindow::HistoryClear()
 374 {
 375     m_History.Empty();
 376     m_HistoryPos = -1;
 377 }
 378
 379
 380
 381 wxList wxHtmlWindow::m_Filters;
 382 wxHtmlFilter *wxHtmlWindow::m_DefaultFilter = NULL;
 383
 384 void wxHtmlWindow::CleanUpStatics()
 385 {
 386     if (m_DefaultFilter) delete m_DefaultFilter;
 387     m_DefaultFilter = NULL;
 388 }
 389
 390
 391
 392 void wxHtmlWindow::AddFilter(wxHtmlFilter *filter)
 393 {
 394     m_Filters.DeleteContents(TRUE);
 395     m_Filters.Append(filter);
 396 }
 397
 398
 399
 400
 401 void wxHtmlWindow::OnLinkClicked(const wxString& link)
 402 {
 403     LoadPage(link);
 404 }
 405
 406
 407
 408 void wxHtmlWindow::OnDraw(wxDC& dc)
 409 {
 410     int x, y;
 411     wxRegionIterator upd(GetUpdateRegion()); // get the update rect list
 412     int v_y, v_h;
 413
 414     if (!m_tmpCanDraw) return;
 415     dc.SetMapMode(wxMM_TEXT);
 416 #if defined(_MSC_VER) && (_MSC_VER == 1200)
 417     ::SetMapMode((HDC)dc.GetHDC(), MM_TEXT);
 418 #endif
 419     dc.SetBackgroundMode(wxTRANSPARENT);
 420     ViewStart(&x, &y);
 421
 422     while (upd) {
 423         v_y = upd.GetY();
 424         v_h = upd.GetH();
 425         if (m_Cell) m_Cell -> Draw(dc, 0, 0, y * HTML_SCROLL_STEP + v_y, y * HTML_SCROLL_STEP + v_h + v_y);
 426         upd++;
 427     }
 428 }
 429
 430
 431
 432
 433 void wxHtmlWindow::OnSize(wxSizeEvent& event)
 434 {
 435     wxScrolledWindow::OnSize(event);
 436     CreateLayout();
 437 }
 438
 439
 440
 441 void wxHtmlWindow::OnKeyDown(wxKeyEvent& event)
 442 {
 443     int dummy;
 444     int sty, szy, cliy;
 445
 446     ViewStart(&dummy, &sty);
 447     GetClientSize(&dummy, &cliy); cliy /= HTML_SCROLL_STEP;
 448     GetVirtualSize(&dummy, &szy); szy /= HTML_SCROLL_STEP;
 449
 450     switch (event.KeyCode()) {
 451         case WXK_PAGEUP :
 452     case WXK_PRIOR :
 453                 Scroll(-1, sty - cliy);
 454                 break;
 455         case WXK_PAGEDOWN :
 456     case WXK_NEXT :
 457                 Scroll(-1, sty + cliy);
 458                 break;
 459         case WXK_HOME :
 460                 Scroll(-1, 0);
 461                 break;
 462         case WXK_END :
 463                 Scroll(-1, szy - cliy);
 464                 break;
 465         case WXK_UP :
 466                 Scroll(-1, sty - 1);
 467                 break;
 468         case WXK_DOWN :
 469                 Scroll(-1, sty + 1);
 470                 break;
 471     }
 472 }
 473
 474
 475
 476 void wxHtmlWindow::OnMouseEvent(wxMouseEvent& event)
 477 {
 478     m_tmpMouseMoved = TRUE;
 479
 480     if (event.ButtonDown()) {
 481         int sx, sy;
 482         wxPoint pos;
 483         wxString lnk;
 484
 485         ViewStart(&sx, &sy); sx *= HTML_SCROLL_STEP; sy *= HTML_SCROLL_STEP;
 486         pos = event.GetPosition();
 487
 488         if (m_Cell)
 489             m_Cell -> OnMouseClick(this, sx + pos.x, sy + pos.y, event.ButtonDown(1), event.ButtonDown(2), event.ButtonDown(3));
 490     }
 491 }
 492
 493
 494
 495 void wxHtmlWindow::OnIdle(wxIdleEvent& event)
 496 {
 497     static wxCursor cur_hand(wxCURSOR_HAND), cur_arrow(wxCURSOR_ARROW);
 498
 499     if (m_tmpMouseMoved && (m_Cell != NULL)) {
 500         int sx, sy;
 501         int x, y;
 502         wxString lnk;
 503
 504         ViewStart(&sx, &sy); sx *= HTML_SCROLL_STEP; sy *= HTML_SCROLL_STEP;
 505         wxGetMousePosition(&x, &y);
 506         ScreenToClient(&x, &y);
 507         lnk = m_Cell -> GetLink(sx + x, sy + y);
 508
 509         if (lnk == wxEmptyString) {
 510             SetCursor(cur_arrow);
 511             if (m_RelatedStatusBar != -1) m_RelatedFrame -> SetStatusText(wxEmptyString, m_RelatedStatusBar);
 512         }
 513         else {
 514             SetCursor(cur_hand);
 515             if (m_RelatedStatusBar != -1) m_RelatedFrame -> SetStatusText(lnk, m_RelatedStatusBar);
 516         }
 517         m_tmpMouseMoved = FALSE;
 518     }
 519 }
 520
 521
 522
 523
 524 IMPLEMENT_DYNAMIC_CLASS(wxHtmlWindow,wxScrolledWindow)
 525
 526 BEGIN_EVENT_TABLE(wxHtmlWindow, wxScrolledWindow)
 527     EVT_SIZE(wxHtmlWindow::OnSize)
 528     EVT_LEFT_DOWN(wxHtmlWindow::OnMouseEvent)
 529     EVT_MOTION(wxHtmlWindow::OnMouseEvent)
 530     EVT_IDLE(wxHtmlWindow::OnIdle)
 531     EVT_KEY_DOWN(wxHtmlWindow::OnKeyDown)
 532 END_EVENT_TABLE()
 533
 534
 535
 536
 537
 538 // A module to allow initialization/cleanup
 539 // without calling these functions from app.cpp or from
 540 // the user's application.
 541
 542 class wxHtmlWinModule: public wxModule
 543 {
 544 DECLARE_DYNAMIC_CLASS(wxHtmlWinModule)
 545 public:
 546     wxHtmlWinModule() : wxModule() {}
 547     bool OnInit() { return TRUE; }
 548     void OnExit() { wxHtmlWindow::CleanUpStatics(); }
 549 };
 550
 551 IMPLEMENT_DYNAMIC_CLASS(wxHtmlWinModule, wxModule)
 552
 553
 554
 555
 556 ///// default mod handlers are forced there:
 557
 558 FORCE_LINK(mod_layout)
 559 FORCE_LINK(mod_fonts)
 560 FORCE_LINK(mod_image)
 561 FORCE_LINK(mod_list)
 562 FORCE_LINK(mod_pre)
 563 FORCE_LINK(mod_hline)
 564 FORCE_LINK(mod_links)
 565 FORCE_LINK(mod_tables)
 566
 567
 568 #endif