1 files changed, 347 insertions, 0 deletions
diff --git a/features/org.eclipse.equinox.executable.feature/library/gtk/eclipseGtk.c b/features/org.eclipse.equinox.executable.feature/library/gtk/eclipseGtk.c
new file mode 100644
index 000000000..6ec48e79f
--- /dev/null
+++ b/features/org.eclipse.equinox.executable.feature/library/gtk/eclipseGtk.c
@@ -0,0 +1,347 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Kevin Cornell (Rational Software Corporation)
+ *     Tom Tromey (Red Hat, Inc.)
+ *******************************************************************************/
+
+#include "eclipseMozilla.h"
+#include "eclipseCommon.h"
+#include "eclipseOS.h"
+#include "eclipseUtil.h"
+#include "eclipseGtk.h"
+
+#include <signal.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/ioctl.h>
+#include <dlfcn.h>
+#ifdef SOLARIS
+#include <sys/filio.h>
+#endif
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <locale.h>
+#include <semaphore.h>
+#include <fcntl.h>
+
+#ifdef HPUX
+#define SEM_FAILED (void *)-1
+#endif
+
+/* Global Variables */
+char*  defaultVM     = "java";
+char*  vmLibrary 	 = "libjvm.so";
+char*  shippedVMDir  = "jre/bin/";
+
+/* Define the special arguments for the various Java VMs. */
+static char*  argVM_JAVA[]        = { NULL };
+
+/* Define local variables . */
+static long			splashHandle = 0;
+static GtkWidget*   shellHandle = 0;
+
+static sem_t* mutex;
+static Atom appWindowAtom, launcherWindowAtom;
+static _TCHAR** openFilePath = NULL; /* the files we want to open */
+static int openFileTimeout = 60; 	 /* number of seconds to wait before timeout */
+static int windowPropertySet = 0;	 /* set to 1 on success */
+
+static struct sigaction quitAction;
+static struct sigaction intAction;
+
+/* Local functions */
+static void catch_signal(int sig) {
+	//catch signals, free the lock, reinstall the original
+	//signal handlers and reraise the signal.
+	sem_post(mutex);
+	sem_close(mutex);
+	sigaction(SIGINT, &intAction, NULL);
+	sigaction(SIGQUIT, &intAction, NULL);
+	raise(sig);
+}
+
+typedef int (*LockFunc)();
+int executeWithLock(char *name, LockFunc func) {
+	int result = -1;
+	int lock = -1;
+	struct sigaction action;
+
+	mutex = sem_open(name, O_CREAT | O_EXCL, S_IRWXU | S_IRWXG | S_IRWXO, 1);
+	if (mutex == SEM_FAILED) {
+		//create failed. Probably lock is already created so try opening the existing lock.
+		mutex = sem_open(name, 0);
+	}
+	if (mutex == SEM_FAILED)
+		return -1; //this is an error.
+
+	// install signal handler to free the lock if something bad happens.
+	// sem_t is not freed automatically when a process ends.
+	action.sa_handler = catch_signal;
+	sigaction(SIGINT, &action, &intAction);
+	sigaction(SIGQUIT, &action, &quitAction);
+
+	while ((lock = sem_trywait(mutex)) != 0) {
+		if (errno == EAGAIN) {
+			//couldn't acquire lock, sleep a bit and try again
+			sleep(1);
+			if (--openFileTimeout > 0)
+				continue;
+		}
+		break;
+	}
+
+	if (lock == 0)
+		result = func();
+
+	sem_post(mutex);
+	sem_close(mutex);
+
+	//reinstall the original signal handlers
+	sigaction(SIGINT, &intAction, NULL);
+	sigaction(SIGQUIT, &quitAction, NULL);
+	return result;
+}
+
+/* Create a "SWT_Window_" + APP_NAME string with optional suffix.
+ * Caller should free the memory when finished */
+static char * createSWTWindowString(char * suffix, int semaphore) {
+#ifdef SOLARIS
+	/* solaris requires semaphore names to start with '/' */
+	char * prefix = semaphore != 0 ? _T_ECLIPSE("/SWT_Window_") : _T_ECLIPSE("SWT_Window_");
+#else
+	char * prefix = _T_ECLIPSE("SWT_Window_");
+#endif
+	
+	char * result = malloc((_tcslen(prefix) + _tcslen(getOfficialName()) + (suffix != NULL ? _tcslen(suffix) : 0) + 1) * sizeof(char));
+	if (suffix != NULL)
+		_stprintf(result, _T_ECLIPSE("%s%s%s"), prefix, getOfficialName(), suffix);
+	else
+		_stprintf(result, _T_ECLIPSE("%s%s"), prefix, getOfficialName());
+	return result;
+}
+
+static int setAppWindowPropertyFn() {
+	Window appWindow;
+	Atom propAtom;
+	_TCHAR *propVal;
+
+	//Look for the SWT window. If it's there, set a property on it.
+	appWindow = gtk.XGetSelectionOwner(gtk_GDK_DISPLAY, appWindowAtom);
+	if (appWindow) {
+		propAtom = gtk.XInternAtom(gtk_GDK_DISPLAY, "org.eclipse.swt.filePath.message", FALSE);
+		//append a colon delimiter in case more than one file gets appended to the app windows property.
+		propVal = concatPaths(openFilePath, _T_ECLIPSE(':'));
+		gtk.XChangeProperty(gtk_GDK_DISPLAY, appWindow, propAtom, propAtom, 8, PropModeAppend, (unsigned char *)propVal, _tcslen(propVal));
+		free(propVal);
+		windowPropertySet = 1;
+		return 1;
+	}
+	return 0;
+}
+
+/* set the Application window property by executing _setWindowPropertyFn within a semaphore */
+int setAppWindowProperty() {
+	int result;
+	char * mutexName = createSWTWindowString(NULL, 1);
+	result = executeWithLock(mutexName, setAppWindowPropertyFn);
+	gtk.XSync(gtk_GDK_DISPLAY, False);
+	free(mutexName);
+	return result;
+}
+
+/* timer callback function to call setAppWindowProperty */
+static gboolean setAppWindowTimerProc(gpointer data) {
+	//try to set the app window property. If unsuccessful return true to reschedule the timer.
+	openFileTimeout--;
+	return !setAppWindowProperty() && openFileTimeout > 0;
+}
+
+int createLauncherWindow() {
+	Window window, launcherWindow;
+	//check if a launcher window exists. If none exists, we know we are the first and we should be launching the app.
+	window = gtk.XGetSelectionOwner(gtk_GDK_DISPLAY, launcherWindowAtom);
+	if (window == 0) {
+		//create a launcher window that other processes can find.
+		launcherWindow = gtk.XCreateWindow(gtk_GDK_DISPLAY, gtk.XRootWindow(gtk_GDK_DISPLAY, gtk.XDefaultScreen(gtk_GDK_DISPLAY)), -10, -10, 1,
+				1, 0, 0, InputOnly, CopyFromParent, (unsigned long) 0, (XSetWindowAttributes *) NULL);
+		//for some reason Set and Get are both necessary. Set alone does nothing.
+		gtk.XSetSelectionOwner(gtk_GDK_DISPLAY, launcherWindowAtom, launcherWindow, CurrentTime);
+		gtk.XGetSelectionOwner(gtk_GDK_DISPLAY, launcherWindowAtom);
+		//add a timeout to set the property on the apps window once the app is launched.
+		gtk.g_timeout_add(1000, setAppWindowTimerProc, 0);
+		return 0;
+	}
+	return 1;
+}
+
+int reuseWorkbench(_TCHAR** filePath, int timeout) {
+	char *appName, *launcherName;
+	int result = 0;
+
+	if (initWindowSystem(&initialArgc, initialArgv, 1) != 0)
+		return -1;
+
+	openFileTimeout = timeout;
+	openFilePath = filePath;
+	
+	//App name is defined in SWT as well. Values must be consistent.
+	appName = createSWTWindowString(NULL, 0);
+	appWindowAtom = gtk.XInternAtom(gtk_GDK_DISPLAY, appName, FALSE);
+	free(appName);
+
+	//check if app is already running. Just set property if it is.
+	if (setAppWindowProperty() > 0)
+		return 1;
+
+	/* app is not running, create a launcher window to act as a mutex so we don't need to keep the semaphore locked */
+	launcherName = createSWTWindowString(_T_ECLIPSE("_Launcher"), 1);
+	launcherWindowAtom = gtk.XInternAtom(gtk_GDK_DISPLAY, launcherName, FALSE);
+	result = executeWithLock(launcherName, createLauncherWindow);
+	free(launcherName);
+
+	if (result == 1) {
+		//The app is already being launched in another process.  Set the property on that app window and exit
+		while (openFileTimeout > 0) {
+			if (setAppWindowProperty() > 0)
+				return 1; //success
+			else {
+				openFileTimeout--;
+				sleep(1);
+			}
+		}
+		//timed out trying to set the app property
+		result = 0;
+	}
+	return result;
+}
+
+/* Create and Display the Splash Window */
+int showSplash( const char* featureImage )
+{
+	GtkWidget *image;
+	GdkPixbuf *pixbuf;
+
+	if (splashHandle != 0)
+		return 0; /* already showing splash */
+	if (featureImage == NULL)
+		return -1;
+	
+	if (initialArgv == NULL)
+		initialArgc = 0;
+	
+	if( initWindowSystem(&initialArgc, initialArgv, 1) != 0)
+		return -1;
+	
+	shellHandle = gtk.gtk_window_new(GTK_WINDOW_TOPLEVEL);
+	gtk.gtk_window_set_decorated((GtkWindow*)(shellHandle), FALSE);
+	gtk.g_signal_connect_data((gpointer)shellHandle, "destroy", (GtkSignalFunc)(gtk.gtk_widget_destroyed), &shellHandle, NULL, 0);
+		
+	pixbuf = gtk.gdk_pixbuf_new_from_file(featureImage, NULL);
+	image = gtk.gtk_image_new_from_pixbuf(pixbuf);
+	if (pixbuf) {
+		gtk.g_object_unref(pixbuf);
+	}
+	gtk.gtk_container_add((GtkContainer*)(shellHandle), image);
+	
+	if (getOfficialName() != NULL)
+		gtk.gtk_window_set_title((GtkWindow*)(shellHandle), getOfficialName());
+	gtk.gtk_window_set_position((GtkWindow*)(shellHandle), GTK_WIN_POS_CENTER);
+	gtk.gtk_window_resize((GtkWindow*)(shellHandle), gtk.gdk_pixbuf_get_width(pixbuf), gtk.gdk_pixbuf_get_height(pixbuf));
+	gtk.gtk_widget_show_all((GtkWidget*)(shellHandle));
+	splashHandle = (long)shellHandle;
+	dispatchMessages();
+	return 0;
+}
+
+void dispatchMessages() {
+	if (gtk.g_main_context_iteration != 0)
+		while(gtk.g_main_context_iteration(0,0) != 0) {}
+}
+
+jlong getSplashHandle() {
+	return splashHandle;
+}
+
+void takeDownSplash() {
+	if(shellHandle != 0) {
+		gtk.gtk_widget_destroy(shellHandle);
+		dispatchMessages();
+		splashHandle = 0;
+		shellHandle = NULL;
+	}
+}
+
+/* Get the window system specific VM arguments */
+char** getArgVM( char* vm ) 
+{
+    char** result;
+
+/*    if (isJ9VM( vm )) 
+        return argVM_J9;*/
+    
+    /* Use the default arguments for a standard Java VM */
+    result = argVM_JAVA;
+    return result;
+}
+
+JavaResults* launchJavaVM( char* args[] )
+{
+	JavaResults* jvmResults = NULL;
+  	pid_t   jvmProcess, finishedProcess = 0;
+  	int     exitCode;
+  	
+#ifdef MOZILLA_FIX
+	fixEnvForMozilla();
+#endif /* MOZILLA_FIX */
+	
+	jvmProcess = fork();
+  	if (jvmProcess == 0) 
+    {
+    	/* Child process ... start the JVM */
+      	execv(args[0], args);
+
+      	/* The JVM would not start ... return error code to parent process. */
+      	/* TODO, how to distinguish this as a launch problem to the other process? */
+      	_exit(errno);
+    }
+
+  	jvmResults = malloc(sizeof(JavaResults));
+  	memset(jvmResults, 0, sizeof(JavaResults));
+  	
+	/* If the JVM is still running, wait for it to terminate. */
+	if (jvmProcess != 0)
+	{
+		/* When attempting a file open, we need to spin the event loop
+		 * for setAppWindowTimerProc to run.  When that succeeds or times out, 
+		 * we can stop the event loop and just wait on the child process.
+		 */
+		if (openFilePath != NULL) {
+			struct timespec sleepTime;
+			sleepTime.tv_sec = 0;
+			sleepTime.tv_nsec = 5e+8; // 500 milliseconds
+			
+			while(openFileTimeout > 0 && !windowPropertySet && (finishedProcess = waitpid(jvmProcess, &exitCode, WNOHANG)) == 0) {
+				dispatchMessages();
+				nanosleep(&sleepTime, NULL);
+			}
+		}
+		if (finishedProcess == 0)
+			waitpid(jvmProcess, &exitCode, 0);
+      	if (WIFEXITED(exitCode))
+      		/* TODO, this should really be a runResult if we could distinguish the launch problem above */
+			jvmResults->launchResult = WEXITSTATUS(exitCode);
+    }
+
+	return jvmResults;
+}