path: root/mozilla-gnome-shell-search-provider.patch

changeset:   504674:5a55ac856fc4
parent:      504609:66531295716a
user:        Martin Stransky <stransky@redhat.com>
date:        Thu Nov 21 10:32:29 2019 +0100
files:       browser/components/shell/moz.build browser/components/shell/nsGNOMEShellSearchProvider.cpp browser/components/shell/nsGNOMEShellSearchProvider.h browser/components/shell/nsGNOMEShellService.cpp browser/components/shell/nsGNOMEShellService.h browser/locales/en-US/chrome/browser/browser.properties toolkit/components/remote/moz.build toolkit/components/remote/nsDBusRemoteServer.cpp
description:
Bug 1239694 Implemenet Gnome search provider, r?jhorak

Implement org.gnome.Shell.SearchProvider2 D-Bus interface and enable it when
widget.gnome-search-provider.enabled pref is set, so this feature is disabled
by default.

Differential Revision: https://phabricator.services.mozilla.com/D54334


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
@@ -29,16 +29,21 @@ if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'coco
 elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk':
     XPIDL_SOURCES += [
         'nsIGNOMEShellService.idl',
     ]
 
     SOURCES += [
         'nsGNOMEShellService.cpp',
     ]
+    if CONFIG['MOZ_ENABLE_DBUS']:
+        SOURCES += [
+            'nsGNOMEShellSearchProvider.cpp',
+        ]
+
 elif CONFIG['OS_ARCH'] == 'WINNT':
     SOURCES += [
         'nsWindowsShellService.cpp',
     ]
     LOCAL_INCLUDES += [
         '../../../other-licenses/nsis/Contrib/CityHash/cityhash',
     ]
 
@@ -52,11 +57,13 @@ EXTRA_JS_MODULES += [
     'ScreenshotChild.jsm',
     'ShellService.jsm',
 ]
 
 for var in ('MOZ_APP_NAME', 'MOZ_APP_VERSION'):
     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.cpp b/browser/components/shell/nsGNOMEShellSearchProvider.cpp
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/nsGNOMEShellSearchProvider.cpp
@@ -0,0 +1,621 @@
+/* -*- 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(MAX_SEARCH_RESULTS_NUM);
+  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::GetIDKeyForURI(int aIndex, nsAutoCString& aUri,
+                                                nsAutoCString& aIDKey) {
+  // Compose ID as NN:URL where NN is index to our current history
+  // result container.
+  aIDKey = nsPrintfCString("%.2d:%s", aIndex, aUri.get());
+}
+
+int nsGNOMEShellSearchProvider::GetIndexFromIDKey(const char* aIDKey) {
+  // ID is NN:URL where NN is index to our current history
+  // result container.
+  char tmp[] = {aIDKey[0], aIDKey[1], '\0'};
+  return atoi(tmp);
+}
+
+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);
+
+    nsAutoCString idKey;
+    GetIDKeyForURI(i, uri, idKey);
+
+    const char* id = idKey.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) {
+  nsCOMPtr<nsINavHistoryResultNode> child;
+  mHistResultContainer->GetChild(GetIndexFromIDKey(aID), 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) {
+  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 {
+    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;
+    }
+
+    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/nsGNOMEShellSearchProvider.h b/browser/components/shell/nsGNOMEShellSearchProvider.h
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/nsGNOMEShellSearchProvider.h
@@ -0,0 +1,55 @@
+/* -*- 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);
+  void GetIDKeyForURI(int aIndex, nsAutoCString& aUri, nsAutoCString& aIDKey);
+  int GetIndexFromIDKey(const char* aIDKey);
+  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/nsGNOMEShellService.cpp b/browser/components/shell/nsGNOMEShellService.cpp
--- a/browser/components/shell/nsGNOMEShellService.cpp
+++ b/browser/components/shell/nsGNOMEShellService.cpp
@@ -87,16 +87,24 @@ nsresult nsGNOMEShellService::Init() {
   // CreateInstance to succeed.
 
   nsCOMPtr<nsIGIOService> giovfs = do_GetService(NS_GIOSERVICE_CONTRACTID);
   nsCOMPtr<nsIGSettingsService> gsettings =
       do_GetService(NS_GSETTINGSSERVICE_CONTRACTID);
 
   if (!giovfs && !gsettings) return NS_ERROR_NOT_AVAILABLE;
 
+#ifdef MOZ_ENABLE_DBUS
+  const char* currentDesktop = getenv("XDG_CURRENT_DESKTOP");
+  if (currentDesktop && strstr(currentDesktop, "GNOME") != nullptr &&
+      Preferences::GetBool("browser.gnome-search-provider.enabled", false)) {
+    mSearchProvider.Startup();
+  }
+#endif
+
   // Check G_BROKEN_FILENAMES.  If it's set, then filenames in glib use
   // the locale encoding.  If it's not set, they use UTF-8.
   mUseLocaleFilenames = PR_GetEnv("G_BROKEN_FILENAMES") != nullptr;
 
   if (GetAppPathFromLauncher()) return NS_OK;
 
   nsCOMPtr<nsIProperties> dirSvc(
       do_GetService("@mozilla.org/file/directory_service;1"));
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
@@ -5,16 +5,19 @@
 
 #ifndef nsgnomeshellservice_h____
 #define nsgnomeshellservice_h____
 
 #include "nsIGNOMEShellService.h"
 #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 {
  public:
   nsGNOMEShellService() : mAppIsInPath(false) {}
 
   NS_DECL_ISUPPORTS
   NS_DECL_NSISHELLSERVICE
@@ -23,15 +26,18 @@ class nsGNOMEShellService final : public
   nsresult Init();
 
  private:
   ~nsGNOMEShellService() {}
 
   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;
   bool mAppIsInPath;
 };
 
 #endif  // nsgnomeshellservice_h____
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
@@ -1021,8 +1021,12 @@ confirmationHint.pinTab.label = Pinned!
 confirmationHint.pinTab.description = Right-click the tab to unpin it.
 confirmationHint.passwordSaved.label = Password saved!
 confirmationHint.breakageReport.label = Report sent. Thank you!
 
 # LOCALIZATION NOTE (livebookmarkMigration.title):
 # 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
@@ -20,16 +20,20 @@ if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk'
         'RemoteUtils.cpp',
     ]
     if CONFIG['MOZ_ENABLE_DBUS']:
         SOURCES += [
             'nsDBusRemoteClient.cpp',
             'nsDBusRemoteServer.cpp',
         ]
         CXXFLAGS += CONFIG['MOZ_DBUS_GLIB_CFLAGS']
+        EXPORTS += [
+            'nsUnixRemoteServer.h',
+            'RemoteUtils.h',
+        ]
     CXXFLAGS += CONFIG['TK_CFLAGS']
 
 if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows':
     SOURCES += [
         'nsWinRemoteClient.cpp',
         'nsWinRemoteServer.cpp',
     ]
 
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
@@ -22,17 +22,17 @@
 
 #include "nsGTKToolkit.h"
 
 #include <dbus/dbus.h>
 #include <dbus/dbus-glib-lowlevel.h>
 
 #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"
     "<node>\n"
     " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
     "   <method name=\"Introspect\">\n"
     "     <arg name=\"data\" direction=\"out\" type=\"s\"/>\n"
     "   </method>\n"