begin theming, patch firefox for KDE global menu

1 files changed, 1940 insertions, 0 deletions

diff --git a/patches/www-client/firefox/mozilla-kde.patch b/patches/www-client/firefox/mozilla-kde.patch
new file mode 100644
index 0000000..281f29b
--- /dev/null
+++ b/patches/www-client/firefox/mozilla-kde.patch
@@ -0,0 +1,1940 @@
+# HG changeset patch
+# User msirringhaus@suse.de
+# Date 1559294891 -7200
+#      Fri May 31 11:28:11 2019 +0200
+# Node ID c2aa7198fb925e7fde96abf65b6f68b9b755f112
+# Parent  52a515e07938d75f7c33e7b724845ce6dc315c0c
+Description: Add KDE integration to Firefox (toolkit parts)
+Author: Wolfgang Rosenauer <wolfgang@rosenauer.org>
+Author: Lubos Lunak <lunak@suse.com>
+Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=140751
+     https://bugzilla.novell.com/show_bug.cgi?id=170055
+
+diff --git a/modules/libpref/Preferences.cpp b/modules/libpref/Preferences.cpp
+--- a/modules/libpref/Preferences.cpp
++++ b/modules/libpref/Preferences.cpp
+@@ -88,16 +88,17 @@
+ #include "nsXPCOM.h"
+ #include "nsXULAppAPI.h"
+ #include "nsZipArchive.h"
+ #include "plbase64.h"
+ #include "PLDHashTable.h"
+ #include "plstr.h"
+ #include "prlink.h"
+ #include "xpcpublic.h"
++#include "nsKDEUtils.h"
+ 
+ #ifdef DEBUG
+ #  include <map>
+ #endif
+ 
+ #ifdef MOZ_MEMORY
+ #  include "mozmemory.h"
+ #endif
+@@ -4543,25 +4544,37 @@ nsresult Preferences::InitInitialObjects
+   // application pref files for backwards compatibility.
+   static const char* specialFiles[] = {
+ #if defined(XP_MACOSX)
+     "macprefs.js"
+ #elif defined(XP_WIN)
+     "winpref.js"
+ #elif defined(XP_UNIX)
+     "unix.js"
++    , "" // placeholder for KDE  (empty is otherwise harmless)
+ #  if defined(_AIX)
+     ,
+     "aix.js"
+ #  endif
+ #elif defined(XP_BEOS)
+     "beos.js"
+ #endif
+   };
+ 
++  if(nsKDEUtils::kdeSession()) { // TODO what if some setup actually requires the helper?
++    for(int i = 0;
++        i < MOZ_ARRAY_LENGTH(specialFiles);
++        ++i ) {
++      if( *specialFiles[ i ] == '\0' ) {
++        specialFiles[ i ] = "kde.js";
++        break;
++      }
++    }
++  }
++
+   rv = pref_LoadPrefsInDir(defaultPrefDir, specialFiles,
+                            ArrayLength(specialFiles));
+   if (NS_FAILED(rv)) {
+     NS_WARNING("Error parsing application default preferences.");
+   }
+ 
+   // Load jar:$app/omni.jar!/defaults/preferences/*.js
+   // or jar:$gre/omni.jar!/defaults/preferences/*.js.
+@@ -4607,17 +4620,17 @@ nsresult Preferences::InitInitialObjects
+       }
+ 
+       nsCOMPtr<nsIFile> path = do_QueryInterface(elem);
+       if (!path) {
+         continue;
+       }
+ 
+       // Do we care if a file provided by this process fails to load?
+-      pref_LoadPrefsInDir(path, nullptr, 0);
++      pref_LoadPrefsInDir(path, specialFiles, ArrayLength(specialFiles));
+     }
+   }
+ 
+   if (XRE_IsParentProcess()) {
+     SetupTelemetryPref();
+   }
+ 
+   NS_CreateServicesFromCategory(NS_PREFSERVICE_APPDEFAULTS_TOPIC_ID, nullptr,
+diff --git a/modules/libpref/moz.build b/modules/libpref/moz.build
+--- a/modules/libpref/moz.build
++++ b/modules/libpref/moz.build
+@@ -113,16 +113,20 @@ EXPORTS.mozilla += [
+ ]
+ EXPORTS.mozilla += sorted(['!' + g for g in gen_h])
+ 
+ UNIFIED_SOURCES += [
+     'Preferences.cpp',
+     'SharedPrefMap.cpp',
+ ]
+ 
++LOCAL_INCLUDES += [
++    '/toolkit/xre'
++]
++
+ gen_all_tuple = tuple(gen_h + gen_cpp + gen_rs)
+ 
+ GENERATED_FILES += [gen_all_tuple]
+ 
+ static_pref_list = GENERATED_FILES[gen_all_tuple]
+ static_pref_list.script = 'init/generate_static_pref_list.py:emit_code'
+ static_pref_list.inputs = ['init/StaticPrefList.yaml']
+ 
+diff --git a/python/mozbuild/mozpack/chrome/flags.py b/python/mozbuild/mozpack/chrome/flags.py
+--- a/python/mozbuild/mozpack/chrome/flags.py
++++ b/python/mozbuild/mozpack/chrome/flags.py
+@@ -227,16 +227,17 @@ class Flags(OrderedDict):
+         'contentaccessible': Flag,
+         'os': StringFlag,
+         'osversion': VersionFlag,
+         'abi': StringFlag,
+         'platform': Flag,
+         'xpcnativewrappers': Flag,
+         'tablet': Flag,
+         'process': StringFlag,
++        'desktop': StringFlag,
+     }
+     RE = re.compile(r'([!<>=]+)')
+ 
+     def __init__(self, *flags):
+         '''
+         Initialize a set of flags given in string form.
+            flags = Flags('contentaccessible=yes', 'appversion>=3.5')
+         '''
+diff --git a/python/mozbuild/mozpack/chrome/manifest.py b/python/mozbuild/mozpack/chrome/manifest.py
+--- a/python/mozbuild/mozpack/chrome/manifest.py
++++ b/python/mozbuild/mozpack/chrome/manifest.py
+@@ -36,16 +36,17 @@ class ManifestEntry(object):
+         'platformversion',
+         'os',
+         'osversion',
+         'abi',
+         'xpcnativewrappers',
+         'tablet',
+         'process',
+         'contentaccessible',
++	'desktop',
+     ]
+ 
+     def __init__(self, base, *flags):
+         '''
+         Initialize a manifest entry with the given base path and flags.
+         '''
+         self.base = base
+         self.flags = Flags(*flags)
+diff --git a/toolkit/components/downloads/moz.build b/toolkit/components/downloads/moz.build
+--- a/toolkit/components/downloads/moz.build
++++ b/toolkit/components/downloads/moz.build
+@@ -41,10 +41,14 @@ XPCOM_MANIFESTS += [
+ 
+ if CONFIG['MOZ_PLACES']:
+     EXTRA_JS_MODULES += [
+         'DownloadHistory.jsm',
+     ]
+ 
+ FINAL_LIBRARY = 'xul'
+ 
++LOCAL_INCLUDES += [
++    '/toolkit/xre'
++]
++
+ with Files('**'):
+     BUG_COMPONENT = ('Toolkit', 'Downloads API')
+diff --git a/toolkit/mozapps/downloads/HelperAppDlg.jsm b/toolkit/mozapps/downloads/HelperAppDlg.jsm
+--- a/toolkit/mozapps/downloads/HelperAppDlg.jsm
++++ b/toolkit/mozapps/downloads/HelperAppDlg.jsm
+@@ -1199,36 +1199,66 @@ nsUnknownContentTypeDialog.prototype = {
+         params.handlerApp &&
+         params.handlerApp.executable &&
+         params.handlerApp.executable.isFile()
+       ) {
+         // Remember the file they chose to run.
+         this.chosenApp = params.handlerApp;
+       }
+     } else if ("@mozilla.org/applicationchooser;1" in Cc) {
+-      var nsIApplicationChooser = Ci.nsIApplicationChooser;
+-      var appChooser = Cc["@mozilla.org/applicationchooser;1"].createInstance(
+-        nsIApplicationChooser
+-      );
+-      appChooser.init(
+-        this.mDialog,
+-        this.dialogElement("strings").getString("chooseAppFilePickerTitle")
+-      );
+-      var contentTypeDialogObj = this;
+-      let appChooserCallback = function appChooserCallback_done(aResult) {
+-        if (aResult) {
+-          contentTypeDialogObj.chosenApp = aResult.QueryInterface(
+-            Ci.nsILocalHandlerApp
+-          );
+-        }
+-        contentTypeDialogObj.finishChooseApp();
+-      };
+-      appChooser.open(this.mLauncher.MIMEInfo.MIMEType, appChooserCallback);
+-      // The finishChooseApp is called from appChooserCallback
+-      return;
++      // handle the KDE case which is implemented in the filepicker
++      // therefore falling back to Gtk2 like behaviour if KDE is running
++      // FIXME this should be better handled in the nsIApplicationChooser
++      // interface
++      var env = Components.classes["@mozilla.org/process/environment;1"]
++                          .getService(Components.interfaces.nsIEnvironment);
++      if (env.get('KDE_FULL_SESSION') == "true")
++      {
++        var nsIFilePicker = Ci.nsIFilePicker;
++        var fp = Cc["@mozilla.org/filepicker;1"]
++                    .createInstance(nsIFilePicker);
++        fp.init(this.mDialog,
++                this.dialogElement("strings").getString("chooseAppFilePickerTitle"),
++                nsIFilePicker.modeOpen);
++
++        fp.appendFilters(nsIFilePicker.filterApps);
++
++        fp.open(aResult => {
++          if (aResult == nsIFilePicker.returnOK && fp.file) {
++            // Remember the file they chose to run.
++            var localHandlerApp =
++              Cc["@mozilla.org/uriloader/local-handler-app;1"].
++                         createInstance(Ci.nsILocalHandlerApp);
++            localHandlerApp.executable = fp.file;
++            this.chosenApp = localHandlerApp;
++          }
++          this.finishChooseApp();
++        });
++      } else {
++        var nsIApplicationChooser = Ci.nsIApplicationChooser;
++        var appChooser = Cc["@mozilla.org/applicationchooser;1"].createInstance(
++          nsIApplicationChooser
++        );
++        appChooser.init(
++          this.mDialog,
++          this.dialogElement("strings").getString("chooseAppFilePickerTitle")
++        );
++        var contentTypeDialogObj = this;
++        let appChooserCallback = function appChooserCallback_done(aResult) {
++          if (aResult) {
++            contentTypeDialogObj.chosenApp = aResult.QueryInterface(
++              Ci.nsILocalHandlerApp
++            );
++          }
++          contentTypeDialogObj.finishChooseApp();
++        };
++        appChooser.open(this.mLauncher.MIMEInfo.MIMEType, appChooserCallback);
++        // The finishChooseApp is called from appChooserCallback
++        return;
++      }
+     } else {
+       var nsIFilePicker = Ci.nsIFilePicker;
+       var fp = Cc["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
+       fp.init(
+         this.mDialog,
+         this.dialogElement("strings").getString("chooseAppFilePickerTitle"),
+         nsIFilePicker.modeOpen
+       );
+diff --git a/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp b/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp
+--- a/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp
++++ b/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp
+@@ -14,16 +14,17 @@
+ #include "nsPrintfCString.h"
+ #include "nsNetCID.h"
+ #include "nsNetUtil.h"
+ #include "nsISupportsPrimitives.h"
+ #include "nsIGSettingsService.h"
+ #include "nsInterfaceHashtable.h"
+ #include "mozilla/Attributes.h"
+ #include "nsIURI.h"
++#include "nsKDEUtils.h"
+ 
+ using namespace mozilla;
+ 
+ class nsUnixSystemProxySettings final : public nsISystemProxySettings {
+  public:
+   NS_DECL_ISUPPORTS
+   NS_DECL_NSISYSTEMPROXYSETTINGS
+ 
+@@ -37,16 +38,18 @@ class nsUnixSystemProxySettings final : 
+   nsCOMPtr<nsIGSettingsCollection> mProxySettings;
+   nsInterfaceHashtable<nsCStringHashKey, nsIGSettingsCollection>
+       mSchemeProxySettings;
+   nsresult GetProxyFromGSettings(const nsACString& aScheme,
+                                  const nsACString& aHost, int32_t aPort,
+                                  nsACString& aResult);
+   nsresult SetProxyResultFromGSettings(const char* aKeyBase, const char* aType,
+                                        nsACString& aResult);
++  nsresult GetProxyFromKDE(const nsACString& aScheme, const nsACString& aHost,
++                           PRInt32 aPort, nsACString& aResult);
+ };
+ 
+ NS_IMPL_ISUPPORTS(nsUnixSystemProxySettings, nsISystemProxySettings)
+ 
+ NS_IMETHODIMP
+ nsUnixSystemProxySettings::GetMainThreadOnly(bool* aMainThreadOnly) {
+   // dbus prevents us from being threadsafe, but this routine should not block
+   // anyhow
+@@ -381,21 +384,50 @@ nsresult nsUnixSystemProxySettings::GetP
+   return NS_OK;
+ }
+ 
+ nsresult nsUnixSystemProxySettings::GetProxyForURI(const nsACString& aSpec,
+                                                    const nsACString& aScheme,
+                                                    const nsACString& aHost,
+                                                    const int32_t aPort,
+                                                    nsACString& aResult) {
++  if (nsKDEUtils::kdeSupport())
++    return GetProxyFromKDE(aScheme, aHost, aPort, aResult);
++
+   if (mProxySettings) {
+     nsresult rv = GetProxyFromGSettings(aScheme, aHost, aPort, aResult);
+     if (NS_SUCCEEDED(rv)) return rv;
+   }
+ 
+   return GetProxyFromEnvironment(aScheme, aHost, aPort, aResult);
+ }
+ 
++nsresult
++nsUnixSystemProxySettings::GetProxyFromKDE(const nsACString& aScheme,
++                                           const nsACString& aHost,
++                                           PRInt32 aPort,
++                                           nsACString& aResult)
++{
++  nsAutoCString url;
++  url = aScheme;
++  url += "://";
++  url += aHost;
++  if( aPort >= 0 )
++  {
++    url += ":";
++    url += nsPrintfCString("%d", aPort);
++  }
++  nsTArray<nsCString> command;
++  command.AppendElement( NS_LITERAL_CSTRING( "GETPROXY" ));
++  command.AppendElement( url );
++  nsTArray<nsCString> result;
++  if( !nsKDEUtils::command( command, &result ) || result.Length() != 1 )
++    return NS_ERROR_FAILURE;
++  aResult = result[0];
++  return NS_OK;
++}
++
++
+ NS_IMPL_COMPONENT_FACTORY(nsUnixSystemProxySettings) {
+   auto result = MakeRefPtr<nsUnixSystemProxySettings>();
+   result->Init();
+   return result.forget().downcast<nsISupports>();
+ }
+diff --git a/toolkit/xre/moz.build b/toolkit/xre/moz.build
+--- a/toolkit/xre/moz.build
++++ b/toolkit/xre/moz.build
+@@ -87,17 +87,19 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'co
+         '../components/printingui',
+     ]
+ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'uikit':
+     UNIFIED_SOURCES += [
+         'nsNativeAppSupportDefault.cpp',
+         'UIKitDirProvider.mm',
+     ]
+ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk':
++    EXPORTS += ['nsKDEUtils.h']
+     UNIFIED_SOURCES += [
++        'nsKDEUtils.cpp',
+         'nsNativeAppSupportUnix.cpp',
+     ]
+ else:
+     UNIFIED_SOURCES += [
+         'nsNativeAppSupportDefault.cpp',
+     ]
+ 
+ if CONFIG['MOZ_HAS_REMOTE']:
+diff --git a/toolkit/xre/nsKDEUtils.cpp b/toolkit/xre/nsKDEUtils.cpp
+new file mode 100644
+--- /dev/null
++++ b/toolkit/xre/nsKDEUtils.cpp
+@@ -0,0 +1,344 @@
++/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++#include "nsKDEUtils.h"
++#include "nsIWidget.h"
++#include "nsISupportsPrimitives.h"
++#include "nsIMutableArray.h"
++#include "nsComponentManagerUtils.h"
++#include "nsArrayUtils.h"
++
++#include <gtk/gtk.h>
++
++#include <limits.h>
++#include <stdio.h>
++#include <sys/wait.h>
++#include <sys/resource.h>
++#include <unistd.h>
++#include <X11/Xlib.h>
++// copied from X11/X.h as a hack since for an unknown
++// reason it's not picked up from X11/X.h
++#ifndef None
++#define None                 0L /* universal null resource or null atom */
++#endif
++
++//#define DEBUG_KDE
++#ifdef DEBUG_KDE
++#define KMOZILLAHELPER "kmozillahelper"
++#else
++// not need for lib64, it's a binary
++#define KMOZILLAHELPER "/usr/lib/mozilla/kmozillahelper"
++#endif
++
++#define KMOZILLAHELPER_VERSION 6
++#define MAKE_STR2( n ) #n
++#define MAKE_STR( n ) MAKE_STR2( n )
++
++static bool getKdeSession()
++    {
++    Display* dpy = XOpenDisplay( NULL );
++    if( dpy == NULL )
++        return false;
++    Atom kde_full_session = XInternAtom( dpy, "KDE_FULL_SESSION", true );
++    bool kde = false;
++    if( kde_full_session != None )
++        {
++        int cnt;
++        if( Atom* props = XListProperties( dpy, DefaultRootWindow( dpy ), &cnt ))
++            {
++            for( int i = 0;
++                 i < cnt;
++                 ++i )
++                {
++                if( props[ i ] == kde_full_session )
++                    {
++                    kde = true;
++#ifdef DEBUG_KDE
++                    fprintf( stderr, "KDE SESSION %d\n", kde );
++#endif
++                    break;
++                    }
++                }
++            XFree( props );
++            }
++        }
++    XCloseDisplay( dpy );
++    return kde;
++    }
++
++static bool getKdeSupport()
++    {
++    nsTArray<nsCString> command;
++    command.AppendElement( NS_LITERAL_CSTRING( "CHECK" ));
++    command.AppendElement( NS_LITERAL_CSTRING( MAKE_STR( KMOZILLAHELPER_VERSION )));
++    bool kde = nsKDEUtils::command( command );
++#ifdef DEBUG_KDE
++    fprintf( stderr, "KDE RUNNING %d\n", kde );
++#endif
++    return kde;
++    }
++
++nsKDEUtils::nsKDEUtils()
++    : commandFile( NULL )
++    , replyFile( NULL )
++    {
++    }
++
++nsKDEUtils::~nsKDEUtils()
++    {
++//    closeHelper(); not actually useful, exiting will close the fd too
++    }
++
++nsKDEUtils* nsKDEUtils::self()
++    {
++    static nsKDEUtils s;
++    return &s;
++    }
++
++static bool helperRunning = false;
++static bool helperFailed = false;
++
++bool nsKDEUtils::kdeSession()
++    {
++    static bool session = getKdeSession();
++    return session;
++    }
++
++bool nsKDEUtils::kdeSupport()
++    {
++    static bool support = kdeSession() && getKdeSupport();
++    return support && helperRunning;
++    }
++
++struct nsKDECommandData
++    {
++    FILE* file;
++    nsTArray<nsCString>* output;
++    GMainLoop* loop;
++    bool success;
++    };
++
++static gboolean kdeReadFunc( GIOChannel*, GIOCondition, gpointer data )
++    {
++    nsKDECommandData* p = static_cast< nsKDECommandData* >( data );
++    char buf[ 8192 ]; // TODO big enough
++    bool command_done = false;
++    bool command_failed = false;
++    while( !command_done && !command_failed && fgets( buf, 8192, p->file ) != NULL )
++        { // TODO what if the kernel splits a line into two chunks?
++//#ifdef DEBUG_KDE
++//        fprintf( stderr, "READ: %s %d\n", buf, feof( p->file ));
++//#endif
++        if( char* eol = strchr( buf, '\n' ))
++            *eol = '\0';
++        command_done = ( strcmp( buf, "\\1" ) == 0 );
++        command_failed = ( strcmp( buf, "\\0" ) == 0 );
++        nsAutoCString line( buf );
++        line.ReplaceSubstring( "\\n", "\n" );
++        line.ReplaceSubstring( "\\" "\\", "\\" ); //  \\ -> \ , i.e. unescape
++        if( p->output && !( command_done || command_failed ))
++            p->output->AppendElement( nsCString( buf )); // TODO utf8?
++        }
++    bool quit = false;
++    if( feof( p->file ) || command_failed )
++        {
++        quit = true;
++        p->success = false;
++        }
++    if( command_done )
++        { // reading one reply finished
++        quit = true;
++        p->success = true;
++        }
++    if( quit )
++        {
++        if( p->loop )
++            g_main_loop_quit( p->loop );
++        return FALSE;
++        }
++    return TRUE;
++    }
++
++bool nsKDEUtils::command( const nsTArray<nsCString>& command, nsTArray<nsCString>* output )
++    {
++    return self()->internalCommand( command, NULL, false, output );
++    }
++
++bool nsKDEUtils::command( nsIArray* command, nsIArray** output)
++    {
++    nsTArray<nsCString> in;
++    PRUint32 length;
++    command->GetLength( &length );
++    for ( PRUint32 i = 0; i < length; i++ )
++        {
++        nsCOMPtr<nsISupportsCString> str = do_QueryElementAt( command, i );
++        if( str )
++            {
++            nsAutoCString s;
++            str->GetData( s );
++            in.AppendElement( s );
++            }
++        }
++
++    nsTArray<nsCString> out;
++    bool ret = self()->internalCommand( in, NULL, false, &out );
++
++    if ( !output ) return ret;
++
++    nsCOMPtr<nsIMutableArray> result = do_CreateInstance( NS_ARRAY_CONTRACTID );
++    if ( !result ) return false;
++
++    for ( PRUint32 i = 0; i < out.Length(); i++ )
++        {
++        nsCOMPtr<nsISupportsCString> rstr = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
++        if ( !rstr ) return false;
++
++        rstr->SetData( out[i] );
++        result->AppendElement( rstr );
++        }
++
++    NS_ADDREF( *output = result);
++    return ret;
++    }
++
++
++bool nsKDEUtils::commandBlockUi( const nsTArray<nsCString>& command, GtkWindow* parent, nsTArray<nsCString>* output )
++    {
++    return self()->internalCommand( command, parent, true, output );
++    }
++
++bool nsKDEUtils::internalCommand( const nsTArray<nsCString>& command, GtkWindow* parent, bool blockUi,
++    nsTArray<nsCString>* output )
++    {
++    if( !startHelper())
++        return false;
++    feedCommand( command );
++    // do not store the data in 'this' but in extra structure, just in case there
++    // is reentrancy (can there be? the event loop is re-entered)
++    nsKDECommandData data;
++    data.file = replyFile;
++    data.output = output;
++    data.success = false;
++    if( blockUi )
++        {
++        data.loop = g_main_loop_new( NULL, FALSE );
++        GtkWidget* window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
++        if( parent && gtk_window_get_group(parent) )
++            gtk_window_group_add_window( gtk_window_get_group(parent), GTK_WINDOW( window ));
++        gtk_widget_realize( window );
++        gtk_widget_set_sensitive( window, TRUE );
++        gtk_grab_add( window );
++        GIOChannel* channel = g_io_channel_unix_new( fileno( data.file ));
++        g_io_add_watch( channel, static_cast< GIOCondition >( G_IO_IN | G_IO_ERR | G_IO_HUP ), kdeReadFunc, &data );
++        g_io_channel_unref( channel );
++        g_main_loop_run( data.loop );
++        g_main_loop_unref( data.loop );
++        gtk_grab_remove( window );
++        gtk_widget_destroy( window );
++        }
++    else
++        {
++        data.loop = NULL;
++        while( kdeReadFunc( NULL, static_cast< GIOCondition >( 0 ), &data ))
++            ;
++        }
++    return data.success;
++    }
++
++bool nsKDEUtils::startHelper()
++    {
++    if( helperRunning )
++        return true;
++    if( helperFailed )
++        return false;
++    helperFailed = true;
++    int fdcommand[ 2 ];
++    int fdreply[ 2 ];
++    if( pipe( fdcommand ) < 0 )
++        return false;
++    if( pipe( fdreply ) < 0 )
++        {
++        close( fdcommand[ 0 ] );
++        close( fdcommand[ 1 ] );
++        return false;
++        }
++    char* args[ 2 ] = { const_cast< char* >( KMOZILLAHELPER ), NULL };
++    switch( fork())
++        {
++        case -1:
++            {
++            close( fdcommand[ 0 ] );
++            close( fdcommand[ 1 ] );
++            close( fdreply[ 0 ] );
++            close( fdreply[ 1 ] );
++            return false;
++            }
++        case 0: // child
++            {
++            if( dup2( fdcommand[ 0 ], STDIN_FILENO ) < 0 )
++                _exit( 1 );
++            if( dup2( fdreply[ 1 ], STDOUT_FILENO ) < 0 )
++                _exit( 1 );
++            int maxfd = 1024; // close all other fds
++            struct rlimit rl;
++            if( getrlimit( RLIMIT_NOFILE, &rl ) == 0 )
++                maxfd = rl.rlim_max;
++            for( int i = 3;
++                 i < maxfd;
++                 ++i )
++                close( i );
++#ifdef DEBUG_KDE
++            execvp( KMOZILLAHELPER, args );
++#else
++            execv( KMOZILLAHELPER, args );
++#endif
++            _exit( 1 ); // failed
++            }
++        default: // parent
++            {
++            commandFile = fdopen( fdcommand[ 1 ], "w" );
++            replyFile = fdopen( fdreply[ 0 ], "r" );
++            close( fdcommand[ 0 ] );
++            close( fdreply[ 1 ] );
++            if( commandFile == NULL || replyFile == NULL )
++                {
++                closeHelper();
++                return false;
++                }
++            // ok, helper ready, getKdeRunning() will check if it works
++            }
++        }
++    helperFailed = false;
++    helperRunning = true;
++    return true;
++    }
++
++void nsKDEUtils::closeHelper()
++    {
++    if( commandFile != NULL )
++        fclose( commandFile ); // this will also make the helper quit
++    if( replyFile != NULL )
++        fclose( replyFile );
++    helperRunning = false;
++    }
++
++void nsKDEUtils::feedCommand( const nsTArray<nsCString>& command )
++    {
++    for( int i = 0;
++         i < command.Length();
++         ++i )
++        {
++        nsCString line = command[ i ];
++        line.ReplaceSubstring( "\\", "\\" "\\" ); // \ -> \\ , i.e. escape
++        line.ReplaceSubstring( "\n", "\\n" );
++#ifdef DEBUG_KDE
++        fprintf( stderr, "COMM: %s\n", line.get());
++#endif
++        fputs( line.get(), commandFile );
++        fputs( "\n", commandFile );
++        }
++    fputs( "\\E\n", commandFile ); // done as \E, so it cannot happen in normal data
++    fflush( commandFile );
++    }
+diff --git a/toolkit/xre/nsKDEUtils.h b/toolkit/xre/nsKDEUtils.h
+new file mode 100644
+--- /dev/null
++++ b/toolkit/xre/nsKDEUtils.h
+@@ -0,0 +1,48 @@
++/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++#ifndef nsKDEUtils_h__
++#define nsKDEUtils_h__
++
++#include "nsString.h"
++#include "nsTArray.h"
++#include <stdio.h>
++
++typedef struct _GtkWindow GtkWindow;
++
++class nsIArray;
++
++class NS_EXPORT nsKDEUtils
++    {
++    public:
++        /* Returns true if running inside a KDE session (regardless of whether there is KDE
++           support available for Firefox). This should be used e.g. when determining
++           dialog button order but not for code that requires the KDE support. */
++        static bool kdeSession();
++        /* Returns true if running inside a KDE session and KDE support is available
++           for Firefox. This should be used everywhere where the external helper is needed. */
++        static bool kdeSupport();
++        /* Executes the given helper command, returns true if helper returned success. */
++        static bool command( const nsTArray<nsCString>& command, nsTArray<nsCString>* output = NULL );
++        static bool command( nsIArray* command, nsIArray** output = NULL );
++        /* Like command(), but additionally blocks the parent widget like if there was
++           a modal dialog shown and enters the event loop (i.e. there are still paint updates,
++           this is for commands that take long). */
++        static bool commandBlockUi( const nsTArray<nsCString>& command, GtkWindow* parent, nsTArray<nsCString>* output = NULL );
++
++    private:
++        nsKDEUtils();
++        ~nsKDEUtils();
++        static nsKDEUtils* self();
++        bool startHelper();
++        void closeHelper();
++        void feedCommand( const nsTArray<nsCString>& command );
++        bool internalCommand( const nsTArray<nsCString>& command, GtkWindow* parent, bool isParent,
++            nsTArray<nsCString>* output );
++        FILE* commandFile;
++        FILE* replyFile;
++    };
++
++#endif // nsKDEUtils
+diff --git a/uriloader/exthandler/HandlerServiceParent.cpp b/uriloader/exthandler/HandlerServiceParent.cpp
+--- a/uriloader/exthandler/HandlerServiceParent.cpp
++++ b/uriloader/exthandler/HandlerServiceParent.cpp
+@@ -7,17 +7,17 @@
+ #include "mozilla/ipc/ProtocolUtils.h"
+ #include "mozilla/Logging.h"
+ #include "HandlerServiceParent.h"
+ #include "nsIHandlerService.h"
+ #include "nsIMIMEInfo.h"
+ #include "ContentHandlerService.h"
+ #include "nsStringEnumerator.h"
+ #ifdef MOZ_WIDGET_GTK
+-#  include "unix/nsGNOMERegistry.h"
++#  include "unix/nsCommonRegistry.h"
+ #endif
+ 
+ using mozilla::dom::ContentHandlerService;
+ using mozilla::dom::HandlerApp;
+ using mozilla::dom::HandlerInfo;
+ using mozilla::dom::RemoteHandlerApp;
+ 
+ namespace {
+@@ -288,17 +288,17 @@ mozilla::ipc::IPCResult HandlerServicePa
+ mozilla::ipc::IPCResult HandlerServiceParent::RecvExistsForProtocolOS(
+     const nsCString& aProtocolScheme, bool* aHandlerExists) {
+   if (aProtocolScheme.Length() > MAX_SCHEME_LENGTH) {
+     *aHandlerExists = false;
+     return IPC_OK();
+   }
+ #ifdef MOZ_WIDGET_GTK
+   // Check the GNOME registry for a protocol handler
+-  *aHandlerExists = nsGNOMERegistry::HandlerExists(aProtocolScheme.get());
++  *aHandlerExists = nsCommonRegistry::HandlerExists(aProtocolScheme.get());
+ #else
+   *aHandlerExists = false;
+ #endif
+   return IPC_OK();
+ }
+ 
+ /*
+  * Check if a handler exists for the provided protocol. Check the datastore
+@@ -317,17 +317,17 @@ mozilla::ipc::IPCResult HandlerServicePa
+   nsCOMPtr<nsIExternalProtocolService> protoSvc =
+       do_GetService(NS_EXTERNALPROTOCOLSERVICE_CONTRACTID, &rv);
+   if (NS_WARN_IF(NS_FAILED(rv))) {
+     *aHandlerExists = false;
+     return IPC_OK();
+   }
+   rv = protoSvc->ExternalProtocolHandlerExists(aProtocolScheme.get(),
+                                                aHandlerExists);
+-
++##
+   if (NS_WARN_IF(NS_FAILED(rv))) {
+     *aHandlerExists = false;
+   }
+ #else
+   MOZ_RELEASE_ASSERT(false, "No implementation on this platform.");
+   *aHandlerExists = false;
+ #endif
+   return IPC_OK();
+diff --git a/uriloader/exthandler/moz.build b/uriloader/exthandler/moz.build
+--- a/uriloader/exthandler/moz.build
++++ b/uriloader/exthandler/moz.build
+@@ -85,17 +85,19 @@ else:
+     SOURCES += [
+         osdir + '/nsOSHelperAppService.cpp',
+     ]
+     if CONFIG['CC_TYPE'] in ('clang', 'gcc'):
+         CXXFLAGS += ['-Wno-error=shadow']
+ 
+ if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk':
+     UNIFIED_SOURCES += [
++        'unix/nsCommonRegistry.cpp',
+         'unix/nsGNOMERegistry.cpp',
++        'unix/nsKDERegistry.cpp',
+         'unix/nsMIMEInfoUnix.cpp',
+     ]
+ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'android':
+     UNIFIED_SOURCES += [
+         'android/nsAndroidHandlerApp.cpp',
+         'android/nsExternalURLHandlerService.cpp',
+         'android/nsMIMEInfoAndroid.cpp',
+     ]
+@@ -135,16 +137,17 @@ include('/ipc/chromium/chromium-config.m
+ FINAL_LIBRARY = 'xul'
+ 
+ LOCAL_INCLUDES += [
+     '/docshell/base',
+     '/dom/base',
+     '/dom/ipc',
+     '/netwerk/base',
+     '/netwerk/protocol/http',
++    '/toolkit/xre',
+ ]
+ 
+ if CONFIG['MOZ_ENABLE_DBUS']:
+     CXXFLAGS += CONFIG['TK_CFLAGS']
+     CXXFLAGS += CONFIG['MOZ_DBUS_CFLAGS']
+ 
+ if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk':
+     CXXFLAGS += CONFIG['TK_CFLAGS']
+diff --git a/uriloader/exthandler/unix/nsCommonRegistry.cpp b/uriloader/exthandler/unix/nsCommonRegistry.cpp
+new file mode 100644
+--- /dev/null
++++ b/uriloader/exthandler/unix/nsCommonRegistry.cpp
+@@ -0,0 +1,53 @@
++/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++#include "nsCommonRegistry.h"
++
++#include "nsGNOMERegistry.h"
++#include "nsKDERegistry.h"
++#include "nsString.h"
++#include "nsKDEUtils.h"
++
++/* static */ bool
++nsCommonRegistry::HandlerExists(const char *aProtocolScheme)
++{
++    if( nsKDEUtils::kdeSupport())
++        return nsKDERegistry::HandlerExists( aProtocolScheme );
++    return nsGNOMERegistry::HandlerExists( aProtocolScheme );
++}
++
++/* static */ nsresult
++nsCommonRegistry::LoadURL(nsIURI *aURL)
++{
++    if( nsKDEUtils::kdeSupport())
++        return nsKDERegistry::LoadURL( aURL );
++    return nsGNOMERegistry::LoadURL( aURL );
++}
++
++/* static */ void
++nsCommonRegistry::GetAppDescForScheme(const nsACString& aScheme,
++                                     nsAString& aDesc)
++{
++    if( nsKDEUtils::kdeSupport())
++        return nsKDERegistry::GetAppDescForScheme( aScheme, aDesc );
++    return nsGNOMERegistry::GetAppDescForScheme( aScheme, aDesc );
++}
++
++
++/* static */ already_AddRefed<nsMIMEInfoBase>
++nsCommonRegistry::GetFromExtension(const nsACString& aFileExt)
++{
++    if( nsKDEUtils::kdeSupport())
++        return nsKDERegistry::GetFromExtension( aFileExt );
++    return nsGNOMERegistry::GetFromExtension( aFileExt );
++}
++
++/* static */ already_AddRefed<nsMIMEInfoBase>
++nsCommonRegistry::GetFromType(const nsACString& aMIMEType)
++{
++    if( nsKDEUtils::kdeSupport())
++        return nsKDERegistry::GetFromType( aMIMEType );
++    return nsGNOMERegistry::GetFromType( aMIMEType );
++}
+diff --git a/uriloader/exthandler/unix/nsCommonRegistry.h b/uriloader/exthandler/unix/nsCommonRegistry.h
+new file mode 100644
+--- /dev/null
++++ b/uriloader/exthandler/unix/nsCommonRegistry.h
+@@ -0,0 +1,28 @@
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++#ifndef nsCommonRegistry_h__
++#define nsCommonRegistry_h__
++
++#include "nsIURI.h"
++#include "nsCOMPtr.h"
++
++class nsMIMEInfoBase;
++
++class nsCommonRegistry
++{
++ public:
++  static bool HandlerExists(const char *aProtocolScheme);
++
++  static nsresult LoadURL(nsIURI *aURL);
++
++  static void GetAppDescForScheme(const nsACString& aScheme,
++                                  nsAString& aDesc);
++
++  static already_AddRefed<nsMIMEInfoBase> GetFromExtension(const nsACString& aFileExt);
++
++  static already_AddRefed<nsMIMEInfoBase> GetFromType(const nsACString& aMIMEType);
++};
++
++#endif
+diff --git a/uriloader/exthandler/unix/nsKDERegistry.cpp b/uriloader/exthandler/unix/nsKDERegistry.cpp
+new file mode 100644
+--- /dev/null
++++ b/uriloader/exthandler/unix/nsKDERegistry.cpp
+@@ -0,0 +1,87 @@
++/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
++/* This Source Code Form is subject to the terms of the Mozilla Public
++ * License, v. 2.0. If a copy of the MPL was not distributed with this
++ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
++
++#include "nsKDERegistry.h"
++#include "prlink.h"
++#include "prmem.h"
++#include "nsString.h"
++#include "nsMIMEInfoUnix.h"
++#include "nsAutoPtr.h"
++#include "nsKDEUtils.h"
++
++/* static */ bool
++nsKDERegistry::HandlerExists(const char *aProtocolScheme)
++{
++    nsTArray<nsCString> command;
++    command.AppendElement( NS_LITERAL_CSTRING( "HANDLEREXISTS" ));
++    command.AppendElement( nsAutoCString( aProtocolScheme ));
++    return nsKDEUtils::command( command );
++}
++
++/* static */ nsresult
++nsKDERegistry::LoadURL(nsIURI *aURL)
++{
++    nsTArray<nsCString> command;
++    command.AppendElement( NS_LITERAL_CSTRING( "OPEN" ));
++    nsCString url;
++    aURL->GetSpec( url );
++    command.AppendElement( url );
++    bool rv = nsKDEUtils::command( command );
++    if (!rv)
++      return NS_ERROR_FAILURE;
++
++    return NS_OK;
++}
++
++/* static */ void
++nsKDERegistry::GetAppDescForScheme(const nsACString& aScheme,
++