firefox/mozilla-gnome-shell-search-provider.patch

diff --git a/browser/components/shell/moz.build b/browser/components/shell/moz.build
--- a/browser/components/shell/moz.build
+++ b/browser/components/shell/moz.build
@@ -34,6 +34,11 @@
     SOURCES += [
         'nsGNOMEShellService.cpp',
     ]
+    if CONFIG['MOZ_ENABLE_DBUS']:
+        SOURCES += [
+            'nsGNOMEShellSearchProvider.cpp',
+        ]
+
 elif CONFIG['OS_ARCH'] == 'WINNT':
     SOURCES += [
         'nsWindowsShellService.cpp',
@@ -57,6 +62,8 @@
     DEFINES[var] = '"%s"' % CONFIG[var]
 
 CXXFLAGS += CONFIG['TK_CFLAGS']
+if CONFIG['MOZ_ENABLE_DBUS']:
+    CXXFLAGS += CONFIG['MOZ_DBUS_GLIB_CFLAGS']
 
 with Files('**'):
     BUG_COMPONENT = ('Firefox', 'Shell Integration')
diff --git a/browser/components/shell/nsGNOMEShellSearchProvider.h b/browser/components/shell/nsGNOMEShellSearchProvider.h
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/nsGNOMEShellSearchProvider.h
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 __nsGNOMEShellSearchProvider_h__
+#define __nsGNOMEShellSearchProvider_h__
+
+#include "mozilla/DBusHelpers.h"
+#include "nsINavHistoryService.h"
+#include "nsUnixRemoteServer.h"
+#include "nsCOMPtr.h"
+
+class nsGNOMEShellSearchProvider : public nsUnixRemoteServer {
+ public:
+  nsGNOMEShellSearchProvider() : mConnection(nullptr) {}
+  ~nsGNOMEShellSearchProvider() { Shutdown(); }
+
+  nsresult Startup();
+  void Shutdown();
+
+  DBusHandlerResult HandleDBusMessage(DBusConnection* aConnection,
+                                      DBusMessage* msg);
+  void UnregisterDBusInterface(DBusConnection* aConnection);
+
+ private:
+  DBusHandlerResult Introspect(DBusMessage* msg);
+
+  DBusHandlerResult GetInitialResultSet(DBusMessage* msg);
+  DBusHandlerResult GetSubsearchResultSet(DBusMessage* msg);
+  DBusHandlerResult GetResultMetas(DBusMessage* msg);
+  DBusHandlerResult ActivateResult(DBusMessage* msg);
+  DBusHandlerResult LaunchSearch(DBusMessage* msg);
+
+  nsresult QueryHistory(const char* aSearchTerm);
+  bool IsHistoryResultNodeURI(nsINavHistoryResultNode* aHistoryNode);
+  void AppendResultID(DBusMessageIter* aIter, const char* aID);
+  void AppendSearchID(DBusMessageIter* aIter, const char* aID);
+  void ComposeSearchResultReply(DBusMessage* aReply, const char* aSearchTerm);
+  void LaunchWithID(const char* aID, uint32_t aTimeStamp);
+  void LaunchWithAllResults(uint32_t aTimeStamp);
+
+  // The connection is owned by DBus library
+  RefPtr<DBusConnection> mConnection;
+  nsCOMPtr<nsINavHistoryContainerResultNode> mHistResultContainer;
+  nsCOMPtr<nsINavHistoryService> mHistoryService;
+  nsAutoCStringN<32> mSearchTerm;
+  nsAutoCString mGnomeSearchTitle;
+};
+
+#endif  // __nsGNOMEShellSearchProvider_h__
diff --git a/browser/components/shell/nsGNOMEShellSearchProvider.cpp b/browser/components/shell/nsGNOMEShellSearchProvider.cpp
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/nsGNOMEShellSearchProvider.cpp
@@ -0,0 +1,607 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "nsGNOMEShellSearchProvider.h"
+
+#include "nsIBaseWindow.h"
+#include "nsIDocShell.h"
+#include "nsPIDOMWindow.h"
+#include "mozilla/ModuleUtils.h"
+#include "mozilla/Base64.h"
+#include "nsIServiceManager.h"
+#include "nsIWidget.h"
+#include "nsIAppShellService.h"
+#include "nsAppShellCID.h"
+#include "nsPrintfCString.h"
+#include "nsCOMPtr.h"
+#include "nsGTKToolkit.h"
+#include "nsINavHistoryService.h"
+#include "nsToolkitCompsCID.h"
+#include "nsIFaviconService.h"
+#include "RemoteUtils.h"
+#include "nsIStringBundle.h"
+
+#include <dbus/dbus.h>
+#include <dbus/dbus-glib-lowlevel.h>
+
+#define MAX_SEARCH_RESULTS_NUM 9
+#define KEYWORD_SEARCH_STRING "special:search"
+#define KEYWORD_SEARCH_STRING_LEN 14
+
+#define DBUS_BUS_NAME "org.mozilla.Firefox.SearchProvider"
+#define DBUS_OBJECT_PATH "/org/mozilla/Firefox/SearchProvider"
+
+static const char* introspect_template =
+    "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection "
+    "1.0//EN\"\n"
+    "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\";>\n"
+    "<node>\n"
+    " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
+    "   <method name=\"Introspect\">\n"
+    "     <arg name=\"data\" direction=\"out\" type=\"s\"/>\n"
+    "   </method>\n"
+    " </interface>\n"
+    " <interface name=\"org.gnome.Shell.SearchProvider2\">\n"
+    "   <method name=\"GetInitialResultSet\">\n"
+    "     <arg type=\"as\" name=\"terms\" direction=\"in\" />\n"
+    "     <arg type=\"as\" name=\"results\" direction=\"out\" />\n"
+    "   </method>\n"
+    "   <method name=\"GetSubsearchResultSet\">\n"
+    "     <arg type=\"as\" name=\"previous_results\" direction=\"in\" />\n"
+    "     <arg type=\"as\" name=\"terms\" direction=\"in\" />\n"
+    "     <arg type=\"as\" name=\"results\" direction=\"out\" />\n"
+    "   </method>\n"
+    "   <method name=\"GetResultMetas\">\n"
+    "     <arg type=\"as\" name=\"identifiers\" direction=\"in\" />\n"
+    "     <arg type=\"aa{sv}\" name=\"metas\" direction=\"out\" />\n"
+    "   </method>\n"
+    "   <method name=\"ActivateResult\">\n"
+    "     <arg type=\"s\" name=\"identifier\" direction=\"in\" />\n"
+    "     <arg type=\"as\" name=\"terms\" direction=\"in\" />\n"
+    "     <arg type=\"u\" name=\"timestamp\" direction=\"in\" />\n"
+    "   </method>\n"
+    "   <method name=\"LaunchSearch\">\n"
+    "     <arg type=\"as\" name=\"terms\" direction=\"in\" />\n"
+    "     <arg type=\"u\" name=\"timestamp\" direction=\"in\" />\n"
+    "   </method>\n"
+    "</interface>\n"
+    "</node>\n";
+
+DBusHandlerResult nsGNOMEShellSearchProvider::Introspect(DBusMessage* aMsg) {
+  DBusMessage* reply;
+
+  reply = dbus_message_new_method_return(aMsg);
+  if (!reply) return DBUS_HANDLER_RESULT_NEED_MEMORY;
+
+  dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspect_template,
+                           DBUS_TYPE_INVALID);
+
+  dbus_connection_send(mConnection, reply, nullptr);
+  dbus_message_unref(reply);
+
+  return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+nsresult nsGNOMEShellSearchProvider::QueryHistory(const char* aSearchTerm) {
+  nsresult rv;
+  nsCOMPtr<nsINavHistoryQuery> histQuery;
+  rv = mHistoryService->GetNewQuery(getter_AddRefs(histQuery));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoCString searchTerm(aSearchTerm);
+  rv = histQuery->SetSearchTerms(NS_ConvertUTF8toUTF16(searchTerm));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsINavHistoryQueryOptions> histQueryOpts;
+  rv = mHistoryService->GetNewQueryOptions(getter_AddRefs(histQueryOpts));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // We want to get the URIs for every item in the user's history with the
+  // given host
+  rv = histQueryOpts->SetResultType(nsINavHistoryQueryOptions::RESULTS_AS_URI);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = histQueryOpts->SetSortingMode(
+      nsINavHistoryQueryOptions::SORT_BY_VISITCOUNT_DESCENDING);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = histQueryOpts->SetMaxResults(10);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // We only search history, because searching both bookmarks and history
+  // is not supported, and history tends to be more comprehensive.
+  rv = histQueryOpts->SetQueryType(
+      nsINavHistoryQueryOptions::QUERY_TYPE_HISTORY);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsINavHistoryResult> histResult;
+  rv = mHistoryService->ExecuteQuery(histQuery, histQueryOpts,
+                                     getter_AddRefs(histResult));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Delete former search results
+  mHistResultContainer = nullptr;
+
+  rv = histResult->GetRoot(getter_AddRefs(mHistResultContainer));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = mHistResultContainer->SetContainerOpen(true);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  uint32_t childCount = 0;
+  rv = mHistResultContainer->GetChildCount(&childCount);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return childCount != 0 ? NS_OK : NS_ERROR_FAILURE;
+}
+
+bool nsGNOMEShellSearchProvider::IsHistoryResultNodeURI(
+    nsINavHistoryResultNode* aHistoryNode) {
+  uint32_t type;
+  nsresult rv = aHistoryNode->GetType(&type);
+  if (NS_FAILED(rv) || type != nsINavHistoryResultNode::RESULT_TYPE_URI)
+    return false;
+
+  nsAutoCString title;
+  rv = aHistoryNode->GetTitle(title);
+  if (NS_SUCCEEDED(rv) && !title.IsEmpty()) {
+    return true;
+  }
+
+  rv = aHistoryNode->GetUri(title);
+  return NS_SUCCEEDED(rv) && !title.IsEmpty();
+}
+
+void nsGNOMEShellSearchProvider::ComposeSearchResultReply(
+    DBusMessage* reply, const char* aSearchTerm) {
+  uint32_t childCount = 0;
+  nsresult rv = mHistResultContainer->GetChildCount(&childCount);
+  if (NS_FAILED(rv) || childCount == 0) {
+    return;
+  }
+
+  if (childCount > MAX_SEARCH_RESULTS_NUM) {
+    childCount = MAX_SEARCH_RESULTS_NUM;
+  }
+
+  DBusMessageIter iter;
+  dbus_message_iter_init_append(reply, &iter);
+  DBusMessageIter iterArray;
+  dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &iterArray);
+
+  for (uint32_t i = 0; i < childCount; i++) {
+    nsCOMPtr<nsINavHistoryResultNode> child;
+    mHistResultContainer->GetChild(i, getter_AddRefs(child));
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      continue;
+    }
+    if (!IsHistoryResultNodeURI(child)) {
+      continue;
+    }
+
+    nsAutoCString uri;
+    child->GetUri(uri);
+
+    nsPrintfCString idString("%d", i);
+    const char* id = idString.get();
+    dbus_message_iter_append_basic(&iterArray, DBUS_TYPE_STRING, &id);
+  }
+
+  nsPrintfCString searchString("%s:%s", KEYWORD_SEARCH_STRING, aSearchTerm);
+  const char* search = searchString.get();
+  dbus_message_iter_append_basic(&iterArray, DBUS_TYPE_STRING, &search);
+
+  dbus_message_iter_close_container(&iter, &iterArray);
+}
+
+DBusHandlerResult nsGNOMEShellSearchProvider::GetInitialResultSet(
+    DBusMessage* aMsg) {
+  DBusMessage* reply;
+  char** stringArray;
+  int elements;
+
+  if (!dbus_message_get_args(aMsg, nullptr, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING,
+                             &stringArray, &elements, DBUS_TYPE_INVALID) ||
+      elements == 0) {
+    reply = dbus_message_new_error(aMsg, DBUS_BUS_NAME, "Wrong argument");
+  } else {
+    reply = dbus_message_new_method_return(aMsg);
+    nsresult rv = QueryHistory(stringArray[0]);
+    if (NS_SUCCEEDED(rv)) {
+      ComposeSearchResultReply(reply, stringArray[0]);
+    }
+    dbus_free_string_array(stringArray);
+  }
+
+  dbus_connection_send(mConnection, reply, nullptr);
+  dbus_message_unref(reply);
+
+  return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+DBusHandlerResult nsGNOMEShellSearchProvider::GetSubsearchResultSet(
+    DBusMessage* aMsg) {
+  DBusMessage* reply;
+
+  char **unusedArray = nullptr, **stringArray = nullptr;
+  int unusedNum, elements;
+
+  if (!dbus_message_get_args(aMsg, nullptr, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING,
+                             &unusedArray, &unusedNum, DBUS_TYPE_ARRAY,
+                             DBUS_TYPE_STRING, &stringArray, &elements,
+                             DBUS_TYPE_INVALID) ||
+      elements == 0) {
+    reply = dbus_message_new_error(aMsg, DBUS_BUS_NAME, "Wrong argument");
+  } else {
+    reply = dbus_message_new_method_return(aMsg);
+    nsresult rv = QueryHistory(stringArray[0]);
+    if (NS_SUCCEEDED(rv)) {
+      ComposeSearchResultReply(reply, stringArray[0]);
+    }
+  }
+
+  if (unusedArray) {
+    dbus_free_string_array(unusedArray);
+  }
+  if (stringArray) {
+    dbus_free_string_array(stringArray);
+  }
+
+  dbus_connection_send(mConnection, reply, nullptr);
+  dbus_message_unref(reply);
+
+  return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+static void appendStringDictionary(DBusMessageIter* aIter, const char* aKey,
+                                   const char* aValue) {
+  DBusMessageIter iterDict, iterVar;
+  dbus_message_iter_open_container(aIter, DBUS_TYPE_DICT_ENTRY, nullptr,
+                                   &iterDict);
+  dbus_message_iter_append_basic(&iterDict, DBUS_TYPE_STRING, &aKey);
+  dbus_message_iter_open_container(&iterDict, DBUS_TYPE_VARIANT, "s", &iterVar);
+  dbus_message_iter_append_basic(&iterVar, DBUS_TYPE_STRING, &aValue);
+  dbus_message_iter_close_container(&iterDict, &iterVar);
+  dbus_message_iter_close_container(aIter, &iterDict);
+}
+
+/* We can return those fields at GetResultMetas:
+  "id": the result ID
+  "name": the display name for the result
+  "icon": a serialized GIcon (see g_icon_serialize()), or alternatively,
+  "gicon": a textual representation of a GIcon (see g_icon_to_string()),
+           or alternativly,
+  "icon-data": a tuple of type (iiibiiay) describing a pixbuf with width,
+              height, rowstride, has-alpha, bits-per-sample, and image data
+  "description": an optional short description (1-2 lines)
+*/
+void nsGNOMEShellSearchProvider::AppendResultID(DBusMessageIter* aIter,
+                                                const char* aID) {
+  int keyIndex = atoi(aID);
+  nsCOMPtr<nsINavHistoryResultNode> child;
+  mHistResultContainer->GetChild(keyIndex, getter_AddRefs(child));
+
+  nsAutoCString title;
+  if (NS_FAILED(child->GetTitle(title))) {
+    return;
+  }
+
+  if (title.IsEmpty()) {
+    if (NS_FAILED(child->GetUri(title)) || title.IsEmpty()) {
+      return;
+    }
+  }
+
+  const char* titleStr = title.get();
+  appendStringDictionary(aIter, "id", aID);
+  appendStringDictionary(aIter, "name", titleStr);
+  appendStringDictionary(aIter, "gicon", "text-html");
+}
+
+void nsGNOMEShellSearchProvider::AppendSearchID(DBusMessageIter* aIter,
+                                                const char* aID) {
+  if (strlen(aID) < KEYWORD_SEARCH_STRING_LEN + 2) {
+    return;
+  }
+  appendStringDictionary(aIter, "id", KEYWORD_SEARCH_STRING);
+  mSearchTerm = nsAutoCStringN<32>(aID + KEYWORD_SEARCH_STRING_LEN + 1);
+  nsPrintfCString searchString(mGnomeSearchTitle.get(), mSearchTerm.get());
+  appendStringDictionary(aIter, "name", searchString.get());
+  appendStringDictionary(aIter, "gicon", "org.mozilla.Firefox");
+}
+
+DBusHandlerResult nsGNOMEShellSearchProvider::GetResultMetas(
+    DBusMessage* aMsg) {
+  DBusMessage* reply;
+  char** stringArray;
+  int elements;
+
+  if (!dbus_message_get_args(aMsg, nullptr, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING,
+                             &stringArray, &elements, DBUS_TYPE_INVALID) ||
+      elements == 0) {
+    reply = dbus_message_new_error(aMsg, DBUS_BUS_NAME, "Wrong argument");
+  } else {
+    reply = dbus_message_new_method_return(aMsg);
+
+    DBusMessageIter iter;
+    dbus_message_iter_init_append(reply, &iter);
+    DBusMessageIter iterArray;
+    dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "a{sv}",
+                                     &iterArray);
+
+    DBusMessageIter iterArray2;
+    for (int i = 0; i < elements; i++) {
+      dbus_message_iter_open_container(&iterArray, DBUS_TYPE_ARRAY, "{sv}",
+                                       &iterArray2);
+      if (strncmp(stringArray[i], KEYWORD_SEARCH_STRING,
+                  KEYWORD_SEARCH_STRING_LEN) == 0) {
+        AppendSearchID(&iterArray2, stringArray[i]);
+      } else {
+        AppendResultID(&iterArray2, stringArray[i]);
+      }
+      dbus_message_iter_close_container(&iterArray, &iterArray2);
+    }
+
+    dbus_message_iter_close_container(&iter, &iterArray);
+    dbus_free_string_array(stringArray);
+  }
+
+  dbus_connection_send(mConnection, reply, nullptr);
+  dbus_message_unref(reply);
+
+  return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+void nsGNOMEShellSearchProvider::LaunchWithID(const char* aID,
+                                              uint32_t aTimeStamp) {
+  int keyIndex = atoi(aID);
+  nsCOMPtr<nsINavHistoryResultNode> child;
+  mHistResultContainer->GetChild(keyIndex, getter_AddRefs(child));
+
+  nsAutoCString uri;
+  nsresult rv = child->GetUri(uri);
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  char* commandLine = nullptr;
+  int tmp;
+
+  if (strncmp(aID, KEYWORD_SEARCH_STRING, KEYWORD_SEARCH_STRING_LEN) == 0) {
+    nsPrintfCString searchString("search:%s", mSearchTerm.get());
+    const char* urlList[2] = {"unused", searchString.get()};
+    commandLine = ConstructCommandLine(2, (char**)urlList, 0, &tmp);
+  } else {
+    const char* urlList[2] = {"unused", uri.get()};
+    commandLine = ConstructCommandLine(2, (char**)urlList, 0, &tmp);
+  }
+
+  if (commandLine) {
+    HandleCommandLine(commandLine, aTimeStamp);
+    free(commandLine);
+  }
+}
+
+void nsGNOMEShellSearchProvider::LaunchWithAllResults(uint32_t aTimeStamp) {
+  uint32_t childCount = 0;
+  nsresult rv = mHistResultContainer->GetChildCount(&childCount);
+  if (NS_FAILED(rv) || childCount == 0) {
+    return;
+  }
+
+  if (childCount > MAX_SEARCH_RESULTS_NUM) {
+    childCount = MAX_SEARCH_RESULTS_NUM;
+  }
+
+  char** urlList = (char**)moz_xmalloc(sizeof(char*) * (childCount + 2));
+  int urlListElements = 0;
+
+  urlList[urlListElements++] = strdup("unused");
+
+  for (uint32_t i = 0; i < childCount; i++) {
+    nsCOMPtr<nsINavHistoryResultNode> child;
+    mHistResultContainer->GetChild(i, getter_AddRefs(child));
+
+    if (!IsHistoryResultNodeURI(child)) {
+      continue;
+    }
+
+    nsAutoCString uri;
+    nsresult rv = child->GetUri(uri);
+    if (NS_FAILED(rv)) {
+      continue;
+    }
+    urlList[urlListElements++] = strdup(uri.get());
+  }
+
+  nsPrintfCString searchString("search:%s", mSearchTerm.get());
+  urlList[urlListElements++] = strdup(searchString.get());
+
+  int tmp;
+  char* commandLine = ConstructCommandLine(urlListElements, urlList, 0, &tmp);
+  if (commandLine) {
+    HandleCommandLine(commandLine, aTimeStamp);
+    free(commandLine);
+  }
+
+  for (int i = 0; i < urlListElements; i++) {
+    free(urlList[i]);
+  }
+  free(urlList);
+}
+
+DBusHandlerResult nsGNOMEShellSearchProvider::ActivateResult(
+    DBusMessage* aMsg) {
+  DBusMessage* reply;
+  char* resultID;
+  char** stringArray;
+  int elements;
+  uint32_t timestamp;
+
+  if (!dbus_message_get_args(aMsg, nullptr, DBUS_TYPE_STRING, &resultID,
+                             DBUS_TYPE_ARRAY, DBUS_TYPE_STRING, &stringArray,
+                             &elements, DBUS_TYPE_UINT32, &timestamp,
+                             DBUS_TYPE_INVALID) ||
+      resultID == nullptr) {
+    reply = dbus_message_new_error(aMsg, DBUS_BUS_NAME, "Wrong argument");
+  } else {
+    reply = dbus_message_new_method_return(aMsg);
+    LaunchWithID(resultID, timestamp);
+    dbus_free_string_array(stringArray);
+  }
+
+  dbus_connection_send(mConnection, reply, nullptr);
+  dbus_message_unref(reply);
+
+  return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+DBusHandlerResult nsGNOMEShellSearchProvider::LaunchSearch(DBusMessage* aMsg) {
+  DBusMessage* reply;
+  char** stringArray;
+  int elements;
+  uint32_t timestamp;
+
+  if (!dbus_message_get_args(aMsg, nullptr, DBUS_TYPE_ARRAY, DBUS_TYPE_STRING,
+                             &stringArray, &elements, DBUS_TYPE_UINT32,
+                             &timestamp, DBUS_TYPE_INVALID) ||
+      elements == 0) {
+    reply = dbus_message_new_error(aMsg, DBUS_BUS_NAME, "Wrong argument");
+  } else {
+    reply = dbus_message_new_method_return(aMsg);
+    LaunchWithAllResults(timestamp);
+    dbus_free_string_array(stringArray);
+  }
+
+  dbus_connection_send(mConnection, reply, nullptr);
+  dbus_message_unref(reply);
+
+  return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+DBusHandlerResult nsGNOMEShellSearchProvider::HandleDBusMessage(
+    DBusConnection* aConnection, DBusMessage* aMsg) {
+  NS_ASSERTION(mConnection == aConnection, "Wrong D-Bus connection.");
+
+  const char* method = dbus_message_get_member(aMsg);
+  const char* iface = dbus_message_get_interface(aMsg);
+
+  if ((strcmp("Introspect", method) == 0) &&
+      (strcmp("org.freedesktop.DBus.Introspectable", iface) == 0)) {
+    return Introspect(aMsg);
+  }
+
+  if (strcmp("org.gnome.Shell.SearchProvider2", iface) == 0) {
+    if (strcmp("GetInitialResultSet", method) == 0) {
+      return GetInitialResultSet(aMsg);
+    }
+    if (strcmp("GetSubsearchResultSet", method) == 0) {
+      return GetSubsearchResultSet(aMsg);
+    }
+    if (strcmp("GetResultMetas", method) == 0) {
+      return GetResultMetas(aMsg);
+    }
+    if (strcmp("ActivateResult", method) == 0) {
+      return ActivateResult(aMsg);
+    }
+    if (strcmp("LaunchSearch", method) == 0) {
+      return LaunchSearch(aMsg);
+    }
+  }
+
+  return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+void nsGNOMEShellSearchProvider::UnregisterDBusInterface(
+    DBusConnection* aConnection) {
+  NS_ASSERTION(mConnection == aConnection, "Wrong D-Bus connection.");
+  // Not implemented
+}
+
+static DBusHandlerResult message_handler(DBusConnection* conn,
+                                         DBusMessage* aMsg, void* user_data) {
+  auto interface = static_cast<nsGNOMEShellSearchProvider*>(user_data);
+  return interface->HandleDBusMessage(conn, aMsg);
+}
+
+static void unregister(DBusConnection* conn, void* user_data) {
+  auto interface = static_cast<nsGNOMEShellSearchProvider*>(user_data);
+  interface->UnregisterDBusInterface(conn);
+}
+
+static DBusObjectPathVTable remoteHandlersTable = {
+    .unregister_function = unregister,
+    .message_function = message_handler,
+};
+
+nsresult nsGNOMEShellSearchProvider::Startup() {
+  if (mConnection && dbus_connection_get_is_connected(mConnection)) {
+    // We're already connected so we don't need to reconnect
+    return NS_ERROR_ALREADY_INITIALIZED;
+  }
+
+  nsCOMPtr<nsIStringBundleService> sbs =
+      do_GetService(NS_STRINGBUNDLE_CONTRACTID);
+  if (NS_WARN_IF(!sbs)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIStringBundle> bundle;
+  sbs->CreateBundle("chrome://browser/locale/browser.properties",
+                    getter_AddRefs(bundle));
+  if (NS_WARN_IF(!bundle)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsAutoString searchTitle;
+  bundle->GetStringFromName("gnomeSearchProviderSearch", searchTitle);
+  mGnomeSearchTitle = NS_ConvertUTF16toUTF8(searchTitle);
+
+  mHistoryService = do_GetService(NS_NAVHISTORYSERVICE_CONTRACTID);
+  if (!mHistoryService) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mConnection =
+      already_AddRefed<DBusConnection>(dbus_bus_get(DBUS_BUS_SESSION, nullptr));
+  if (!mConnection) {
+    return NS_ERROR_FAILURE;
+  }
+  dbus_connection_set_exit_on_disconnect(mConnection, false);
+  dbus_connection_setup_with_g_main(mConnection, nullptr);
+
+  DBusError err;
+  dbus_error_init(&err);
+  dbus_bus_request_name(mConnection, DBUS_BUS_NAME, DBUS_NAME_FLAG_DO_NOT_QUEUE,
+                        &err);
+  // The interface is already owned - there is another application/profile
+  // instance already running.
+  if (dbus_error_is_set(&err)) {
+    dbus_error_free(&err);
+    mConnection = nullptr;
+    return NS_ERROR_FAILURE;
+  }
+
+  if (!dbus_connection_register_object_path(mConnection, DBUS_OBJECT_PATH,
+                                            &remoteHandlersTable, this)) {
+    mConnection = nullptr;
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+void nsGNOMEShellSearchProvider::Shutdown() {
+  if (!mConnection) {
+    return;
+  }
+
+  dbus_connection_unregister_object_path(mConnection, DBUS_OBJECT_PATH);
+
+  // dbus_connection_unref() will be called by RefPtr here.
+  mConnection = nullptr;
+}
diff --git a/browser/components/shell/nsGNOMEShellService.h b/browser/components/shell/nsGNOMEShellService.h
--- a/browser/components/shell/nsGNOMEShellService.h
+++ b/browser/components/shell/nsGNOMEShellService.h
@@ -10,6 +10,9 @@
 #include "nsToolkitShellService.h"
 #include "nsString.h"
 #include "mozilla/Attributes.h"
+#ifdef MOZ_ENABLE_DBUS
+#  include "nsGNOMEShellSearchProvider.h"
+#endif
 
 class nsGNOMEShellService final : public nsIGNOMEShellService,
                                   public nsToolkitShellService {
@@ -28,6 +31,9 @@
   bool KeyMatchesAppName(const char* aKeyValue) const;
   bool CheckHandlerMatchesAppName(const nsACString& handler) const;
 
+#ifdef MOZ_ENABLE_DBUS
+  nsGNOMEShellSearchProvider mSearchProvider;
+#endif
   bool GetAppPathFromLauncher();
   bool mUseLocaleFilenames;
   nsCString mAppPath;
diff --git a/browser/components/shell/nsGNOMEShellService.cpp b/browser/components/shell/nsGNOMEShellService.cpp
--- a/browser/components/shell/nsGNOMEShellService.cpp
+++ b/browser/components/shell/nsGNOMEShellService.cpp
@@ -107,7 +107,15 @@
                    getter_AddRefs(appPath));
   NS_ENSURE_SUCCESS(rv, rv);
 
-  return appPath->GetNativePath(mAppPath);
+  rv = appPath->GetNativePath(mAppPath);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+#ifdef MOZ_ENABLE_DBUS
+  if (Preferences::GetBool("widget.gnome-search-provider.enabled", false)) {
+    mSearchProvider.Startup();
+  }
+#endif
+  return NS_OK;
 }
 
 NS_IMPL_ISUPPORTS(nsGNOMEShellService, nsIGNOMEShellService, nsIShellService,
diff --git a/browser/locales/en-US/chrome/browser/browser.properties b/browser/locales/en-US/chrome/browser/browser.properties
--- a/browser/locales/en-US/chrome/browser/browser.properties
+++ b/browser/locales/en-US/chrome/browser/browser.properties
@@ -1026,3 +1026,7 @@
 # Used by the export of user's live bookmarks to an OPML file as a title for the file.
 # %S will be replaced with brandShortName
 livebookmarkMigration.title                      = %S Live Bookmarks
+
+# LOCALIZATION NOTE (gnomeSearchProviderSearch):
+# Used for search by Gnome Shell activity screen, %s is a searched string.
+gnomeSearchProviderSearch=Search the web for “%s”
diff --git a/toolkit/components/remote/moz.build b/toolkit/components/remote/moz.build
--- a/toolkit/components/remote/moz.build
+++ b/toolkit/components/remote/moz.build
@@ -25,6 +25,10 @@
             'nsDBusRemoteServer.cpp',
         ]
         CXXFLAGS += CONFIG['MOZ_DBUS_GLIB_CFLAGS']
+        EXPORTS += [
+            'nsUnixRemoteServer.h',
+            'RemoteUtils.h',
+        ]
     CXXFLAGS += CONFIG['TK_CFLAGS']
 
 if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows':
diff --git a/toolkit/components/remote/nsDBusRemoteServer.cpp b/toolkit/components/remote/nsDBusRemoteServer.cpp
--- a/toolkit/components/remote/nsDBusRemoteServer.cpp
+++ b/toolkit/components/remote/nsDBusRemoteServer.cpp
@@ -27,7 +27,7 @@
 
 #include <dlfcn.h>
 
-const char* introspect_template =
+static const char* introspect_template =
     "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection "
     "1.0//EN\"\n"
     "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\";>\n"