src/x11/utils.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/x11/utils.cpp
   3 // Purpose:     Various utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // for compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if defined(__BORLANDC__)
  16     #pragma hdrstop
  17 #endif
  18
  19 // ============================================================================
  20 // declarations
  21 // ============================================================================
  22
  23 // ----------------------------------------------------------------------------
  24 // headers
  25 // ----------------------------------------------------------------------------
  26
  27 #include "wx/utils.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31     #include "wx/window.h" // for wxTopLevelWindows
  32     #include "wx/cursor.h"
  33     #include "wx/msgdlg.h"
  34 #endif
  35
  36 #include "wx/apptrait.h"
  37 #include "wx/generic/private/timer.h"
  38 #include "wx/evtloop.h"
  39
  40 #include <ctype.h>
  41 #include <stdarg.h>
  42 #include <dirent.h>
  43 #include <string.h>
  44 #include <sys/stat.h>
  45 #include <sys/types.h>
  46 #include <unistd.h>
  47 #include <sys/wait.h>
  48 #include <pwd.h>
  49 #include <errno.h>
  50 // #include <netdb.h>
  51 #include <signal.h>
  52
  53 #if (defined(__SUNCC__) || defined(__CLCC__))
  54     #include <sysent.h>
  55 #endif
  56
  57 #ifdef __VMS__
  58 #pragma message disable nosimpint
  59 #endif
  60
  61 #include "wx/unix/execute.h"
  62
  63 #include "wx/x11/private.h"
  64
  65 #include "X11/Xutil.h"
  66
  67 #ifdef __VMS__
  68 #pragma message enable nosimpint
  69 #endif
  70
  71 // ----------------------------------------------------------------------------
  72 // async event processing
  73 // ----------------------------------------------------------------------------
  74
  75 // Consume all events until no more left
  76 void wxFlushEvents()
  77 {
  78     Display *display = (Display*) wxGetDisplay();
  79
  80     XSync (display, FALSE);
  81
  82     // TODO for X11
  83     // ??
  84 }
  85
  86 bool wxCheckForInterrupt(wxWindow *WXUNUSED(wnd))
  87 {
  88     wxFAIL_MSG(wxT("wxCheckForInterrupt not yet implemented."));
  89     return false;
  90 }
  91
  92 // ----------------------------------------------------------------------------
  93 // wxExecute stuff
  94 // ----------------------------------------------------------------------------
  95
  96 WX_DECLARE_HASH_MAP( int, wxEndProcessData*, wxIntegerHash, wxIntegerEqual, wxProcMap );
  97
  98 static wxProcMap *gs_procmap;
  99
 100 int wxAddProcessCallback(wxEndProcessData *proc_data, int fd)
 101 {
 102     if (!gs_procmap) gs_procmap = new wxProcMap();
 103     (*gs_procmap)[fd] = proc_data;
 104     return 1;
 105 }
 106
 107 void wxCheckForFinishedChildren()
 108 {
 109     wxProcMap::iterator it;
 110     if (!gs_procmap) return;
 111     if (gs_procmap->size() == 0) {
 112       // Map empty, delete it.
 113       delete gs_procmap;
 114       gs_procmap = NULL;
 115       return;
 116     }
 117     for (it = gs_procmap->begin();it != gs_procmap->end(); ++it)
 118     {
 119         wxEndProcessData *proc_data = it->second;
 120         int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
 121         int status = 0;
 122         // has the process really terminated?
 123         int rc = waitpid(pid, &status, WNOHANG);
 124         if (rc == 0)
 125             continue;       // no, it didn't exit yet, continue waiting
 126
 127         // set exit code to -1 if something bad happened
 128         proc_data->exitcode = rc != -1 && WIFEXITED(status) ?
 129                    WEXITSTATUS(status) : -1;
 130
 131         // child exited, end waiting
 132         close(it->first);
 133
 134         // don't call us again!
 135         gs_procmap->erase(it->first);
 136
 137         wxHandleProcessTermination(proc_data);
 138
 139         // Iterator is invalid. Handle any further children in subsequent
 140         // calls.
 141         break;
 142     }
 143 }
 144
 145 // ----------------------------------------------------------------------------
 146 // misc
 147 // ----------------------------------------------------------------------------
 148
 149 // Emit a beeeeeep
 150 #ifndef __EMX__
 151 // on OS/2, we use the wxBell from wxBase library (src/os2/utils.cpp)
 152 void wxBell()
 153 {
 154     // Use current setting for the bell
 155     XBell ((Display*) wxGetDisplay(), 0);
 156 }
 157 #endif
 158
 159 wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
 160 {
 161     // get X protocol version
 162     Display *display = wxGlobalDisplay();
 163     if (display)
 164     {
 165         if ( verMaj )
 166             *verMaj = ProtocolVersion (display);
 167         if ( verMin )
 168             *verMin = ProtocolRevision (display);
 169     }
 170
 171     return wxPORT_X11;
 172 }
 173
 174 wxEventLoopBase* wxGUIAppTraits::CreateEventLoop()
 175 {
 176     return new wxEventLoop;
 177 }
 178
 179 // ----------------------------------------------------------------------------
 180 // display info
 181 // ----------------------------------------------------------------------------
 182
 183 void wxGetMousePosition( int* x, int* y )
 184 {
 185 #if wxUSE_NANOX
 186     // TODO
 187     *x = 0;
 188     *y = 0;
 189 #else
 190     XMotionEvent xev;
 191     Window root, child;
 192     XQueryPointer((Display*) wxGetDisplay(),
 193                   DefaultRootWindow((Display*) wxGetDisplay()),
 194                   &root, &child,
 195                   &(xev.x_root), &(xev.y_root),
 196                   &(xev.x),      &(xev.y),
 197                   &(xev.state));
 198     *x = xev.x_root;
 199     *y = xev.y_root;
 200 #endif
 201 };
 202
 203 // Return true if we have a colour display
 204 bool wxColourDisplay()
 205 {
 206     return wxDisplayDepth() > 1;
 207 }
 208
 209 // Returns depth of screen
 210 int wxDisplayDepth()
 211 {
 212     Display *dpy = (Display*) wxGetDisplay();
 213
 214     return DefaultDepth (dpy, DefaultScreen (dpy));
 215 }
 216
 217 // Get size of display
 218 void wxDisplaySize(int *width, int *height)
 219 {
 220     Display *dpy = (Display*) wxGetDisplay();
 221
 222     if ( width )
 223         *width = DisplayWidth (dpy, DefaultScreen (dpy));
 224     if ( height )
 225         *height = DisplayHeight (dpy, DefaultScreen (dpy));
 226 }
 227
 228 void wxDisplaySizeMM(int *width, int *height)
 229 {
 230     Display *dpy = (Display*) wxGetDisplay();
 231
 232     if ( width )
 233         *width = DisplayWidthMM(dpy, DefaultScreen (dpy));
 234     if ( height )
 235         *height = DisplayHeightMM(dpy, DefaultScreen (dpy));
 236 }
 237
 238 wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 239 {
 240     return wxGenericFindWindowAtPoint(pt);
 241 }
 242
 243
 244 // Configurable display in wxX11 and wxMotif
 245 static Display *gs_currentDisplay = NULL;
 246 static wxString gs_displayName;
 247
 248 WXDisplay *wxGetDisplay()
 249 {
 250     return (WXDisplay *)gs_currentDisplay;
 251 }
 252
 253 // close the current display
 254 void wxCloseDisplay()
 255 {
 256     if ( gs_currentDisplay )
 257     {
 258         if ( XCloseDisplay(gs_currentDisplay) != 0 )
 259         {
 260             wxLogWarning(_("Failed to close the display \"%s\""),
 261                          gs_displayName.c_str());
 262         }
 263
 264         gs_currentDisplay = NULL;
 265         gs_displayName.clear();
 266     }
 267 }
 268
 269 bool wxSetDisplay(const wxString& displayName)
 270 {
 271     Display *dpy = XOpenDisplay
 272                    (
 273                     displayName.empty() ? NULL
 274                                         : (const char *)displayName.mb_str()
 275                    );
 276
 277     if ( !dpy )
 278     {
 279         wxLogError(_("Failed to open display \"%s\"."), displayName.c_str());
 280         return false;
 281     }
 282
 283     wxCloseDisplay();
 284
 285     gs_currentDisplay = dpy;
 286     gs_displayName = displayName;
 287
 288     return true;
 289 }
 290
 291 wxString wxGetDisplayName()
 292 {
 293     return gs_displayName;
 294 }
 295
 296 #include "wx/module.h"
 297
 298 // the module responsible for closing the X11 display at the program end
 299 class wxX11DisplayModule : public wxModule
 300 {
 301 public:
 302     virtual bool OnInit() { return true; }
 303     virtual void OnExit() { wxCloseDisplay(); }
 304
 305 private:
 306     DECLARE_DYNAMIC_CLASS(wxX11DisplayModule)
 307 };
 308
 309 IMPLEMENT_DYNAMIC_CLASS(wxX11DisplayModule, wxModule)
 310
 311 // ----------------------------------------------------------------------------
 312 // Some colour manipulation routines
 313 // ----------------------------------------------------------------------------
 314
 315 void wxHSVToXColor(wxHSV *hsv,XColor *rgb)
 316 {
 317     int h = hsv->h;
 318     int s = hsv->s;
 319     int v = hsv->v;
 320     int r = 0, g = 0, b = 0;
 321     int i, f;
 322     int p, q, t;
 323     s = (s * wxMAX_RGB) / wxMAX_SV;
 324     v = (v * wxMAX_RGB) / wxMAX_SV;
 325     if (h == 360) h = 0;
 326     if (s == 0) { h = 0; r = g = b = v; }
 327     i = h / 60;
 328     f = h % 60;
 329     p = v * (wxMAX_RGB - s) / wxMAX_RGB;
 330     q = v * (wxMAX_RGB - s * f / 60) / wxMAX_RGB;
 331     t = v * (wxMAX_RGB - s * (60 - f) / 60) / wxMAX_RGB;
 332     switch (i)
 333     {
 334     case 0: r = v, g = t, b = p; break;
 335     case 1: r = q, g = v, b = p; break;
 336     case 2: r = p, g = v, b = t; break;
 337     case 3: r = p, g = q, b = v; break;
 338     case 4: r = t, g = p, b = v; break;
 339     case 5: r = v, g = p, b = q; break;
 340     }
 341     rgb->red = r << 8;
 342     rgb->green = g << 8;
 343     rgb->blue = b << 8;
 344 }
 345
 346 void wxXColorToHSV(wxHSV *hsv,XColor *rgb)
 347 {
 348     int r = rgb->red >> 8;
 349     int g = rgb->green >> 8;
 350     int b = rgb->blue >> 8;
 351     int maxv = wxMax3(r, g, b);
 352     int minv = wxMin3(r, g, b);
 353     int h = 0, s, v;
 354     v = maxv;
 355     if (maxv) s = (maxv - minv) * wxMAX_RGB / maxv;
 356     else s = 0;
 357     if (s == 0) h = 0;
 358     else
 359     {
 360         int rc, gc, bc, hex = 0;
 361         rc = (maxv - r) * wxMAX_RGB / (maxv - minv);
 362         gc = (maxv - g) * wxMAX_RGB / (maxv - minv);
 363         bc = (maxv - b) * wxMAX_RGB / (maxv - minv);
 364         if (r == maxv) { h = bc - gc, hex = 0; }
 365         else if (g == maxv) { h = rc - bc, hex = 2; }
 366         else if (b == maxv) { h = gc - rc, hex = 4; }
 367         h = hex * 60 + (h * 60 / wxMAX_RGB);
 368         if (h < 0) h += 360;
 369     }
 370     hsv->h = h;
 371     hsv->s = (s * wxMAX_SV) / wxMAX_RGB;
 372     hsv->v = (v * wxMAX_SV) / wxMAX_RGB;
 373 }
 374
 375 void wxAllocNearestColor(Display *d,Colormap cmp,XColor *xc)
 376 {
 377 #if !wxUSE_NANOX
 378     int llp;
 379
 380     int screen = DefaultScreen(d);
 381     int num_colors = DisplayCells(d,screen);
 382
 383     XColor *color_defs = new XColor[num_colors];
 384     for(llp = 0;llp < num_colors;llp++) color_defs[llp].pixel = llp;
 385     XQueryColors(d,cmp,color_defs,num_colors);
 386
 387     wxHSV hsv_defs, hsv;
 388     wxXColorToHSV(&hsv,xc);
 389
 390     int diff, min_diff = 0, pixel = 0;
 391
 392     for(llp = 0;llp < num_colors;llp++)
 393     {
 394         wxXColorToHSV(&hsv_defs,&color_defs[llp]);
 395         diff = wxSIGN(wxH_WEIGHT * (hsv.h - hsv_defs.h)) +
 396             wxSIGN(wxS_WEIGHT * (hsv.s - hsv_defs.s)) +
 397             wxSIGN(wxV_WEIGHT * (hsv.v - hsv_defs.v));
 398         if (llp == 0) min_diff = diff;
 399         if (min_diff > diff) { min_diff = diff; pixel = llp; }
 400         if (min_diff == 0) break;
 401     }
 402
 403     xc -> red = color_defs[pixel].red;
 404     xc -> green = color_defs[pixel].green;
 405     xc -> blue = color_defs[pixel].blue;
 406     xc -> flags = DoRed | DoGreen | DoBlue;
 407
 408 /*  FIXME, TODO
 409     if (!XAllocColor(d,cmp,xc))
 410         cout << "wxAllocNearestColor : Warning : Cannot find nearest color !\n";
 411 */
 412
 413     delete[] color_defs;
 414 #endif
 415 }
 416
 417 void wxAllocColor(Display *d,Colormap cmp,XColor *xc)
 418 {
 419     if (!XAllocColor(d,cmp,xc))
 420     {
 421         //          cout << "wxAllocColor : Warning : Can not allocate color, attempt find nearest !\n";
 422         wxAllocNearestColor(d,cmp,xc);
 423     }
 424 }
 425
 426 #ifdef __WXDEBUG__
 427 wxString wxGetXEventName(XEvent& event)
 428 {
 429 #if wxUSE_NANOX
 430     wxString str(wxT("(some event)"));
 431     return str;
 432 #else
 433     int type = event.xany.type;
 434     static char* event_name[] = {
 435         "", "unknown(-)",                                         // 0-1
 436         "KeyPress", "KeyRelease", "ButtonPress", "ButtonRelease", // 2-5
 437         "MotionNotify", "EnterNotify", "LeaveNotify", "FocusIn",  // 6-9
 438         "FocusOut", "KeymapNotify", "Expose", "GraphicsExpose",   // 10-13
 439         "NoExpose", "VisibilityNotify", "CreateNotify",           // 14-16
 440         "DestroyNotify", "UnmapNotify", "MapNotify", "MapRequest",// 17-20
 441         "ReparentNotify", "ConfigureNotify", "ConfigureRequest",  // 21-23
 442         "GravityNotify", "ResizeRequest", "CirculateNotify",      // 24-26
 443         "CirculateRequest", "PropertyNotify", "SelectionClear",   // 27-29
 444         "SelectionRequest", "SelectionNotify", "ColormapNotify",  // 30-32
 445         "ClientMessage", "MappingNotify",                         // 33-34
 446         "unknown(+)"};                                            // 35
 447         type = wxMin(35, type); type = wxMax(1, type);
 448         return wxString::FromAscii(event_name[type]);
 449 #endif
 450 }
 451 #endif
 452
 453 bool wxWindowIsVisible(Window win)
 454 {
 455     XWindowAttributes wa;
 456     XGetWindowAttributes(wxGlobalDisplay(), win, &wa);
 457
 458     return (wa.map_state == IsViewable);
 459 }