Add m-esr52 at 52.6.0

1 files changed, 377 insertions, 0 deletions

diff --git a/accessible/atk/Platform.cpp b/accessible/atk/Platform.cpp
new file mode 100644
index 000000000..e64084f5a
--- /dev/null
+++ b/accessible/atk/Platform.cpp
@@ -0,0 +1,377 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "Platform.h"
+
+#include "nsIAccessibleEvent.h"
+#include "nsIGConfService.h"
+#include "nsIServiceManager.h"
+#include "nsMai.h"
+#include "AtkSocketAccessible.h"
+#include "prenv.h"
+#include "prlink.h"
+
+#ifdef MOZ_ENABLE_DBUS
+#include <dbus/dbus.h>
+#endif
+#include <gtk/gtk.h>
+
+#if (MOZ_WIDGET_GTK == 3)
+extern "C" __attribute__((weak,visibility("default"))) int atk_bridge_adaptor_init(int*, char **[]);
+#endif
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+int atkMajorVersion = 1, atkMinorVersion = 12;
+
+GType (*gAtkTableCellGetTypeFunc)();
+
+extern "C" {
+typedef GType (* AtkGetTypeType) (void);
+typedef void (*GnomeAccessibilityInit) (void);
+typedef void (*GnomeAccessibilityShutdown) (void);
+}
+
+static PRLibrary* sATKLib = nullptr;
+static const char sATKLibName[] = "libatk-1.0.so.0";
+static const char sATKHyperlinkImplGetTypeSymbol[] =
+  "atk_hyperlink_impl_get_type";
+
+gboolean toplevel_event_watcher(GSignalInvocationHint*, guint, const GValue*,
+                                gpointer);
+static bool sToplevel_event_hook_added = false;
+static gulong sToplevel_show_hook = 0;
+static gulong sToplevel_hide_hook = 0;
+
+GType g_atk_hyperlink_impl_type = G_TYPE_INVALID;
+
+struct GnomeAccessibilityModule
+{
+    const char *libName;
+    PRLibrary *lib;
+    const char *initName;
+    GnomeAccessibilityInit init;
+    const char *shutdownName;
+    GnomeAccessibilityShutdown shutdown;
+};
+
+static GnomeAccessibilityModule sAtkBridge = {
+#ifdef AIX
+    "libatk-bridge.a(libatk-bridge.so.0)", nullptr,
+#else
+    "libatk-bridge.so", nullptr,
+#endif
+    "gnome_accessibility_module_init", nullptr,
+    "gnome_accessibility_module_shutdown", nullptr
+};
+
+#if (MOZ_WIDGET_GTK == 2)
+static GnomeAccessibilityModule sGail = {
+    "libgail.so", nullptr,
+    "gnome_accessibility_module_init", nullptr,
+    "gnome_accessibility_module_shutdown", nullptr
+};
+#endif
+
+static nsresult
+LoadGtkModule(GnomeAccessibilityModule& aModule)
+{
+    NS_ENSURE_ARG(aModule.libName);
+
+    if (!(aModule.lib = PR_LoadLibrary(aModule.libName))) {
+        //try to load the module with "gtk-2.0/modules" appended
+        char *curLibPath = PR_GetLibraryPath();
+        nsAutoCString libPath(curLibPath);
+#if defined(LINUX) && defined(__x86_64__)
+        libPath.AppendLiteral(":/usr/lib64:/usr/lib");
+#else
+        libPath.AppendLiteral(":/usr/lib");
+#endif
+        PR_FreeLibraryName(curLibPath);
+
+        int16_t loc1 = 0, loc2 = 0;
+        int16_t subLen = 0;
+        while (loc2 >= 0) {
+            loc2 = libPath.FindChar(':', loc1);
+            if (loc2 < 0)
+                subLen = libPath.Length() - loc1;
+            else
+                subLen = loc2 - loc1;
+            nsAutoCString sub(Substring(libPath, loc1, subLen));
+#if (MOZ_WIDGET_GTK == 2)
+            sub.AppendLiteral("/gtk-2.0/modules/");
+#else
+            sub.AppendLiteral("/gtk-3.0/modules/");
+#endif
+            sub.Append(aModule.libName);
+            aModule.lib = PR_LoadLibrary(sub.get());
+            if (aModule.lib)
+                break;
+
+            loc1 = loc2+1;
+        }
+        if (!aModule.lib)
+            return NS_ERROR_FAILURE;
+    }
+
+    //we have loaded the library, try to get the function ptrs
+    if (!(aModule.init = PR_FindFunctionSymbol(aModule.lib,
+                                               aModule.initName)) ||
+        !(aModule.shutdown = PR_FindFunctionSymbol(aModule.lib,
+                                                   aModule.shutdownName))) {
+
+        //fail, :(
+        PR_UnloadLibrary(aModule.lib);
+        aModule.lib = nullptr;
+        return NS_ERROR_FAILURE;
+    }
+    return NS_OK;
+}
+
+void
+a11y::PlatformInit()
+{
+  if (!ShouldA11yBeEnabled())
+    return;
+
+  sATKLib = PR_LoadLibrary(sATKLibName);
+  if (!sATKLib)
+    return;
+
+  AtkGetTypeType pfn_atk_hyperlink_impl_get_type =
+    (AtkGetTypeType) PR_FindFunctionSymbol(sATKLib, sATKHyperlinkImplGetTypeSymbol);
+  if (pfn_atk_hyperlink_impl_get_type)
+    g_atk_hyperlink_impl_type = pfn_atk_hyperlink_impl_get_type();
+
+  AtkGetTypeType pfn_atk_socket_get_type = (AtkGetTypeType)
+    PR_FindFunctionSymbol(sATKLib, AtkSocketAccessible::sATKSocketGetTypeSymbol);
+  if (pfn_atk_socket_get_type) {
+    AtkSocketAccessible::g_atk_socket_type = pfn_atk_socket_get_type();
+    AtkSocketAccessible::g_atk_socket_embed = (AtkSocketEmbedType)
+      PR_FindFunctionSymbol(sATKLib, AtkSocketAccessible ::sATKSocketEmbedSymbol);
+    AtkSocketAccessible::gCanEmbed =
+      AtkSocketAccessible::g_atk_socket_type != G_TYPE_INVALID &&
+      AtkSocketAccessible::g_atk_socket_embed;
+  }
+
+  gAtkTableCellGetTypeFunc = (GType (*)())
+    PR_FindFunctionSymbol(sATKLib, "atk_table_cell_get_type");
+
+  const char* (*atkGetVersion)() =
+    (const char* (*)()) PR_FindFunctionSymbol(sATKLib, "atk_get_version");
+  if (atkGetVersion) {
+    const char* version = atkGetVersion();
+    if (version) {
+      char* endPtr = nullptr;
+      atkMajorVersion = strtol(version, &endPtr, 10);
+      if (*endPtr == '.')
+        atkMinorVersion = strtol(endPtr + 1, &endPtr, 10);
+    }
+  }
+
+#if (MOZ_WIDGET_GTK == 2)
+  // Load and initialize gail library.
+  nsresult rv = LoadGtkModule(sGail);
+  if (NS_SUCCEEDED(rv))
+    (*sGail.init)();
+#endif
+
+  // Initialize the MAI Utility class, it will overwrite gail_util.
+  g_type_class_unref(g_type_class_ref(mai_util_get_type()));
+
+  // Init atk-bridge now
+  PR_SetEnv("NO_AT_BRIDGE=0");
+#if (MOZ_WIDGET_GTK == 3)
+  if (atk_bridge_adaptor_init) {
+    atk_bridge_adaptor_init(nullptr, nullptr);
+  } else
+#endif
+  {
+    nsresult rv = LoadGtkModule(sAtkBridge);
+    if (NS_SUCCEEDED(rv)) {
+      (*sAtkBridge.init)();
+    }
+  }
+
+  if (!sToplevel_event_hook_added) {
+    sToplevel_event_hook_added = true;
+    sToplevel_show_hook =
+      g_signal_add_emission_hook(g_signal_lookup("show", GTK_TYPE_WINDOW),
+                                 0, toplevel_event_watcher,
+                                 reinterpret_cast<gpointer>(nsIAccessibleEvent::EVENT_SHOW),
+                                 nullptr);
+    sToplevel_hide_hook =
+      g_signal_add_emission_hook(g_signal_lookup("hide", GTK_TYPE_WINDOW), 0,
+                                 toplevel_event_watcher,
+                                 reinterpret_cast<gpointer>(nsIAccessibleEvent::EVENT_HIDE),
+                                 nullptr);
+  }
+}
+
+void
+a11y::PlatformShutdown()
+{
+    if (sToplevel_event_hook_added) {
+      sToplevel_event_hook_added = false;
+      g_signal_remove_emission_hook(g_signal_lookup("show", GTK_TYPE_WINDOW),
+                                    sToplevel_show_hook);
+      g_signal_remove_emission_hook(g_signal_lookup("hide", GTK_TYPE_WINDOW),
+                                    sToplevel_hide_hook);
+    }
+
+    if (sAtkBridge.lib) {
+        // Do not shutdown/unload atk-bridge,
+        // an exit function registered will take care of it
+        // if (sAtkBridge.shutdown)
+        //     (*sAtkBridge.shutdown)();
+        // PR_UnloadLibrary(sAtkBridge.lib);
+        sAtkBridge.lib = nullptr;
+        sAtkBridge.init = nullptr;
+        sAtkBridge.shutdown = nullptr;
+    }
+#if (MOZ_WIDGET_GTK == 2)
+    if (sGail.lib) {
+        // Do not shutdown gail because
+        // 1) Maybe it's not init-ed by us. e.g. GtkEmbed
+        // 2) We need it to avoid assert in spi_atk_tidy_windows
+        // if (sGail.shutdown)
+        //   (*sGail.shutdown)();
+        // PR_UnloadLibrary(sGail.lib);
+        sGail.lib = nullptr;
+        sGail.init = nullptr;
+        sGail.shutdown = nullptr;
+    }
+#endif
+    // if (sATKLib) {
+    //     PR_UnloadLibrary(sATKLib);
+    //     sATKLib = nullptr;
+    // }
+}
+
+  static const char sAccEnv [] = "GNOME_ACCESSIBILITY";
+#ifdef MOZ_ENABLE_DBUS
+static DBusPendingCall *sPendingCall = nullptr;
+#endif
+
+void
+a11y::PreInit()
+{
+#ifdef MOZ_ENABLE_DBUS
+  static bool sChecked = FALSE;
+  if (sChecked)
+    return;
+
+  sChecked = TRUE;
+
+  // dbus is only checked if GNOME_ACCESSIBILITY is unset
+  // also make sure that a session bus address is available to prevent dbus from
+  // starting a new one.  Dbus confuses the test harness when it creates a new
+  // process (see bug 693343)
+  if (PR_GetEnv(sAccEnv) || !PR_GetEnv("DBUS_SESSION_BUS_ADDRESS"))
+    return;
+
+  DBusConnection* bus = dbus_bus_get(DBUS_BUS_SESSION, nullptr);
+  if (!bus)
+    return;
+
+  dbus_connection_set_exit_on_disconnect(bus, FALSE);
+
+  static const char* iface = "org.a11y.Status";
+  static const char* member = "IsEnabled";
+  DBusMessage *message;
+  message = dbus_message_new_method_call("org.a11y.Bus", "/org/a11y/bus",
+                                         "org.freedesktop.DBus.Properties",
+                                         "Get");
+  if (!message)
+    goto dbus_done;
+
+  dbus_message_append_args(message, DBUS_TYPE_STRING, &iface,
+                           DBUS_TYPE_STRING, &member, DBUS_TYPE_INVALID);
+  dbus_connection_send_with_reply(bus, message, &sPendingCall, 1000);
+  dbus_message_unref(message);
+
+dbus_done:
+  dbus_connection_unref(bus);
+#endif
+}
+
+bool
+a11y::ShouldA11yBeEnabled()
+{
+  static bool sChecked = false, sShouldEnable = false;
+  if (sChecked)
+    return sShouldEnable;
+
+  sChecked = true;
+
+  EPlatformDisabledState disabledState = PlatformDisabledState();
+  if (disabledState == ePlatformIsDisabled)
+    return sShouldEnable = false;
+
+  // check if accessibility enabled/disabled by environment variable
+  const char* envValue = PR_GetEnv(sAccEnv);
+  if (envValue)
+    return sShouldEnable = !!atoi(envValue);
+
+#ifdef MOZ_ENABLE_DBUS
+  PreInit();
+  bool dbusSuccess = false;
+  DBusMessage *reply = nullptr;
+  if (!sPendingCall)
+    goto dbus_done;
+
+  dbus_pending_call_block(sPendingCall);
+  reply = dbus_pending_call_steal_reply(sPendingCall);
+  dbus_pending_call_unref(sPendingCall);
+  sPendingCall = nullptr;
+  if (!reply ||
+      dbus_message_get_type(reply) != DBUS_MESSAGE_TYPE_METHOD_RETURN ||
+      strcmp(dbus_message_get_signature (reply), DBUS_TYPE_VARIANT_AS_STRING))
+    goto dbus_done;
+
+  DBusMessageIter iter, iter_variant, iter_struct;
+  dbus_bool_t dResult;
+  dbus_message_iter_init(reply, &iter);
+  dbus_message_iter_recurse (&iter, &iter_variant);
+  switch (dbus_message_iter_get_arg_type(&iter_variant)) {
+    case DBUS_TYPE_STRUCT:
+      // at-spi2-core 2.2.0-2.2.1 had a bug where it returned a struct
+      dbus_message_iter_recurse(&iter_variant, &iter_struct);
+      if (dbus_message_iter_get_arg_type(&iter_struct) == DBUS_TYPE_BOOLEAN) {
+        dbus_message_iter_get_basic(&iter_struct, &dResult);
+        sShouldEnable = dResult;
+        dbusSuccess = true;
+      }
+
+      break;
+    case DBUS_TYPE_BOOLEAN:
+      dbus_message_iter_get_basic(&iter_variant, &dResult);
+      sShouldEnable = dResult;
+      dbusSuccess = true;
+      break;
+    default:
+      break;
+  }
+
+dbus_done:
+  if (reply)
+    dbus_message_unref(reply);
+
+  if (dbusSuccess)
+    return sShouldEnable;
+#endif
+
+  //check gconf-2 setting
+#define GCONF_A11Y_KEY "/desktop/gnome/interface/accessibility"
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIGConfService> gconf =
+    do_GetService(NS_GCONFSERVICE_CONTRACTID, &rv);
+  if (NS_SUCCEEDED(rv) && gconf)
+    gconf->GetBool(NS_LITERAL_CSTRING(GCONF_A11Y_KEY), &sShouldEnable);
+
+  return sShouldEnable;
+}