libjava/gnu/gcj/xlib/natDisplay.cc

   1 /* Copyright (C) 1999, 2000  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 #include <X11/Xproto.h>
  10 #include <X11/Xlib.h>
  11 #include <stdio.h>
  12
  13 #include <java/lang/System.h>
  14 #include <java/lang/RuntimeException.h>
  15 #include <java/io/PrintStream.h>
  16 #include <gcj/cni.h>
  17
  18 #include <gnu/gcj/xlib/Display.h>
  19 #include <gnu/gcj/xlib/XConnectException.h>
  20 #include <gnu/gcj/xlib/XException.h>
  21
  22 void gnu::gcj::xlib::Display::init()
  23 {
  24   ::Display* openedDisplay = XOpenDisplay(0); // default display
  25
  26   if (openedDisplay == 0) {
  27     jstring msg = JvNewStringLatin1("Unable to open display");
  28     throw new gnu::gcj::xlib::XConnectException(msg);
  29   }
  30
  31   display = reinterpret_cast<gnu::gcj::RawData*>(openedDisplay);
  32 }
  33
  34 void gnu::gcj::xlib::Display::finalize()
  35 {
  36   if (display == 0) return;
  37   ::Display* dpy = (::Display*) display;
  38   XCloseDisplay(dpy);
  39 }
  40
  41 jint gnu::gcj::xlib::Display::getDefaultScreenNumber()
  42 {
  43   ::Display* dpy = (::Display*) display;
  44   return DefaultScreen(dpy);
  45 }
  46
  47 jint gnu::gcj::xlib::Display::getDefaultRootWindowXID()
  48 {
  49   ::Display* dpy = (::Display*) display;
  50   return DefaultRootWindow(dpy);
  51 }
  52
  53 jint gnu::gcj::xlib::Display::internAtom(jstring name)
  54 {
  55   ::Display* dpy = (::Display*) display;
  56   int len = JvGetStringUTFLength(name);
  57   char cName[len+1];
  58   JvGetStringUTFRegion(name, 0, name->length(), cName);
  59   cName[len] = '\0';
  60   bool onlyIfExists = false;
  61   return XInternAtom(dpy, cName, onlyIfExists);
  62 }
  63
  64 jstring gnu::gcj::xlib::Display::getAtomName(jint atom)
  65 {
  66   ::Display* dpy = (::Display*) display;
  67   char* cName = XGetAtomName(dpy, atom);
  68   jstring name = JvNewStringLatin1(cName);
  69   XFree(cName);
  70   return name;
  71 }
  72
  73 static int handleXError(Display* dpy, XErrorEvent* xee)
  74 {
  75   const int ERROR_TEXT_LENGTH = 256;
  76   char errorText[ERROR_TEXT_LENGTH];
  77   XGetErrorText(dpy, xee->error_code, errorText, ERROR_TEXT_LENGTH);
  78   int requestCode = xee->request_code;
  79
  80   if (requestCode == X_GetImage)
  81     {
  82       /* The current implementation of Drawable.copyIntoXImage()
  83          will generate harmless X_GetImage errors if the initially
  84          requested area is not completly within the drawable. Until
  85          we find a better solution, simply ignore these errors. */
  86       return 0;
  87     }
  88
  89   java::lang::System::err->print(JvNewStringLatin1("X error: "));
  90   java::lang::System::err->print(JvNewStringLatin1(errorText));
  91   java::lang::System::err->print(JvNewStringLatin1(", serial="));
  92   java::lang::System::err->print((jlong) xee->serial);
  93   java::lang::System::err->print(JvNewStringLatin1(", requestCode="));
  94   java::lang::System::err->print((jint) requestCode);
  95
  96   if (requestCode < 128)
  97     {
  98       char number[8];
  99       snprintf(number, 8, "%d", requestCode);
 100       number[7] = '\0';
 101
 102       XGetErrorDatabaseText(dpy, "XRequest", number,
 103                             "", errorText, ERROR_TEXT_LENGTH);
 104       java::lang::System::err->print(JvNewStringLatin1(" ("));
 105       java::lang::System::err->print(JvNewStringLatin1(errorText));
 106       java::lang::System::err->print(JvNewStringLatin1(")"));
 107     }
 108
 109   java::lang::System::err->print(JvNewStringLatin1(", minorCode="));
 110   java::lang::System::err->print((jint) xee->minor_code);
 111   java::lang::System::err->print(JvNewStringLatin1(", XID="));
 112   java::lang::System::err->println((jlong) xee->resourceid);
 113
 114   return 0;
 115 }
 116
 117 void gnu::gcj::xlib::Display::staticInit()
 118 {
 119   if (XInitThreads() == 0)
 120     {
 121       char msg[] = "threads are not supported on this platform";
 122       throw new ::java::lang::RuntimeException(JvNewStringLatin1(msg));
 123     }
 124
 125   XSetErrorHandler(&handleXError);
 126 }
 127
 128 void gnu::gcj::xlib::Display::flush()
 129 {
 130   ::Display* dpy = (::Display*) display;
 131   XFlush(dpy);
 132 }