a minimal workable embedding example (gtk)

[mr . chobits]

//thanks a lot to Torisugari, Benjamin Smedberg, Emil Wikström & all
mozilla dev docs, thank you all

#define XPCOM_GLUE
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <gtk/gtk.h>
#include "xpcom-config.h"
#include "nsXPCOMGlue.h"
#include "nsDebug.h"
#include "nsCOMPtr.h"
#include "widget/nsIBaseWindow.h"
#include "nsILocalFile.h"
#include "nsIWebBrowser.h"
#include "docshell/nsIWebNavigation.h"
#include "nsEmbedCID.h"
#include "nsEmbedString.h"
#include "xulapp/nsXULAppAPI.h"
#include "nsComponentManagerUtils.h"

XRE_InitEmbeddingType XRE_InitEmbedding;
XRE_TermEmbeddingType XRE_TermEmbedding;

static gboolean delete_event( GtkWidget *widget, GdkEvent *event,
gpointer data ) {
        gtk_main_quit();
        return FALSE;
}

int main(int argc, char** argv) {
        GtkWidget *window;
        nsCOMPtr<nsIBaseWindow> baseWindow;
        nsCOMPtr<nsIWebBrowser> webBrowser;
        nsCOMPtr<nsILocalFile> libxul;
        nsCOMPtr<nsIWebNavigation> webNavigation;
        nsDynamicFunctionLoad nsFuncs[] = {
                {"XRE_InitEmbedding", (NSFuncPtr*)&XRE_InitEmbedding},
                {"XRE_TermEmbedding", (NSFuncPtr*)
&XRE_TermEmbedding},
                {0, 0}
        };
        nsresult rv;
        gtk_init (&argc, &argv);
        window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
        gtk_widget_show(window);
        rv = XPCOMGlueStartup("/opt/xulrunner/libxpcom.so");
        if (NS_FAILED(rv)) {
                printf("XPCOMGlueStartup\n");
        }
        rv = XPCOMGlueLoadXULFunctions(nsFuncs);
        if (NS_FAILED(rv)) {
                printf("XPCOMGlueLoadXULFunctions\n");
        }
        rv = NS_NewNativeLocalFile(nsEmbedCString("/opt/xulrunner"),
PR_FALSE, getter_AddRefs(libxul));
        if (NS_FAILED(rv)) {
                printf("NS_NewNativeLocalFile\n");
        }
        rv = XRE_InitEmbedding(libxul, 0, 0, 0, 0);
        if (NS_FAILED(rv)) {
                printf("XRE_InitEmbedding\n");
        }
        webBrowser = do_CreateInstance(NS_WEBBROWSER_CONTRACTID, &rv);
        if (NS_FAILED(rv)) {
                printf("do_CreateInstance webBrowser\n");
        }
        baseWindow = do_QueryInterface(webBrowser);
        rv = baseWindow->InitWindow(window, 0, 0, 0, 300, 400);
        if (NS_FAILED(rv)) {
                printf("InitWindow\n");
        }
        rv = baseWindow->Create();
        if (NS_FAILED(rv)) {
                printf("Create\n");
        }
        rv =baseWindow->SetVisibility(PR_TRUE);
        if (NS_FAILED(rv)) {
                printf("SetVisibility\n");
        }
        webNavigation = do_QueryInterface(webBrowser);
        rv = webNavigation->LoadURI(NS_ConvertASCIItoUTF16("http://
www.google.com").get(),
nsIWebNavigation::LOAD_FLAGS_NONE, 0, 0, 0);
        if (NS_FAILED(rv)) {
                printf("LoadURI\n");
        }
        g_signal_connect(G_OBJECT(window), "delete_event",
G_CALLBACK(delete_event), 0);
        gtk_main();
        printf("exit...\n");
        XRE_TermEmbedding();
        XPCOMGlueShutdown();
        return 0;
}
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