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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /accessible/atk/UtilInterface.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'accessible/atk/UtilInterface.cpp')
-rw-r--r--accessible/atk/UtilInterface.cpp411
1 files changed, 411 insertions, 0 deletions
diff --git a/accessible/atk/UtilInterface.cpp b/accessible/atk/UtilInterface.cpp
new file mode 100644
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--- /dev/null
+++ b/accessible/atk/UtilInterface.cpp
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+/* -*- 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 "ApplicationAccessibleWrap.h"
+#include "mozilla/Likely.h"
+#include "nsAccessibilityService.h"
+#include "nsMai.h"
+
+#include <atk/atk.h>
+#include <gtk/gtk.h>
+#include <string.h>
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+typedef AtkUtil MaiUtil;
+typedef AtkUtilClass MaiUtilClass;
+
+#define MAI_VERSION MOZILLA_VERSION
+#define MAI_NAME "Gecko"
+
+extern "C" {
+static guint (*gail_add_global_event_listener)(GSignalEmissionHook listener,
+ const gchar* event_type);
+static void (*gail_remove_global_event_listener) (guint remove_listener);
+static void (*gail_remove_key_event_listener) (guint remove_listener);
+static AtkObject* (*gail_get_root)();
+}
+
+struct MaiUtilListenerInfo
+{
+ gint key;
+ guint signal_id;
+ gulong hook_id;
+ // For window create/destory/minimize/maximize/restore/activate/deactivate
+ // events, we'll chain gail_util's add/remove_global_event_listener.
+ // So we store the listenerid returned by gail's add_global_event_listener
+ // in this structure to call gail's remove_global_event_listener later.
+ guint gail_listenerid;
+};
+
+static GHashTable* sListener_list = nullptr;
+static gint sListener_idx = 1;
+
+extern "C" {
+static guint
+add_listener (GSignalEmissionHook listener,
+ const gchar *object_type,
+ const gchar *signal,
+ const gchar *hook_data,
+ guint gail_listenerid = 0)
+{
+ GType type;
+ guint signal_id;
+ gint rc = 0;
+
+ type = g_type_from_name(object_type);
+ if (type) {
+ signal_id = g_signal_lookup(signal, type);
+ if (signal_id > 0) {
+ MaiUtilListenerInfo *listener_info;
+
+ rc = sListener_idx;
+
+ listener_info = (MaiUtilListenerInfo *)
+ g_malloc(sizeof(MaiUtilListenerInfo));
+ listener_info->key = sListener_idx;
+ listener_info->hook_id =
+ g_signal_add_emission_hook(signal_id, 0, listener,
+ g_strdup(hook_data),
+ (GDestroyNotify)g_free);
+ listener_info->signal_id = signal_id;
+ listener_info->gail_listenerid = gail_listenerid;
+
+ g_hash_table_insert(sListener_list, &(listener_info->key),
+ listener_info);
+ sListener_idx++;
+ }
+ else {
+ g_warning("Invalid signal type %s\n", signal);
+ }
+ }
+ else {
+ g_warning("Invalid object type %s\n", object_type);
+ }
+ return rc;
+}
+
+static guint
+mai_util_add_global_event_listener(GSignalEmissionHook listener,
+ const gchar *event_type)
+{
+ guint rc = 0;
+ gchar **split_string;
+
+ split_string = g_strsplit (event_type, ":", 3);
+
+ if (split_string) {
+ if (!strcmp ("window", split_string[0])) {
+ guint gail_listenerid = 0;
+ if (gail_add_global_event_listener) {
+ // call gail's function to track gtk native window events
+ gail_listenerid =
+ gail_add_global_event_listener(listener, event_type);
+ }
+
+ rc = add_listener (listener, "MaiAtkObject", split_string[1],
+ event_type, gail_listenerid);
+ }
+ else {
+ rc = add_listener (listener, split_string[1], split_string[2],
+ event_type);
+ }
+ g_strfreev(split_string);
+ }
+ return rc;
+}
+
+static void
+mai_util_remove_global_event_listener(guint remove_listener)
+{
+ if (remove_listener > 0) {
+ MaiUtilListenerInfo *listener_info;
+ gint tmp_idx = remove_listener;
+
+ listener_info = (MaiUtilListenerInfo *)
+ g_hash_table_lookup(sListener_list, &tmp_idx);
+
+ if (listener_info != nullptr) {
+ if (gail_remove_global_event_listener &&
+ listener_info->gail_listenerid) {
+ gail_remove_global_event_listener(listener_info->gail_listenerid);
+ }
+
+ /* Hook id of 0 and signal id of 0 are invalid */
+ if (listener_info->hook_id != 0 && listener_info->signal_id != 0) {
+ /* Remove the emission hook */
+ g_signal_remove_emission_hook(listener_info->signal_id,
+ listener_info->hook_id);
+
+ /* Remove the element from the hash */
+ g_hash_table_remove(sListener_list, &tmp_idx);
+ }
+ else {
+ g_warning("Invalid listener hook_id %ld or signal_id %d\n",
+ listener_info->hook_id, listener_info->signal_id);
+ }
+ }
+ else {
+ // atk-bridge is initialized with gail (e.g. yelp)
+ // try gail_remove_global_event_listener
+ if (gail_remove_global_event_listener) {
+ return gail_remove_global_event_listener(remove_listener);
+ }
+
+ g_warning("No listener with the specified listener id %d",
+ remove_listener);
+ }
+ }
+ else {
+ g_warning("Invalid listener_id %d", remove_listener);
+ }
+}
+
+static AtkKeyEventStruct *
+atk_key_event_from_gdk_event_key (GdkEventKey *key)
+{
+ AtkKeyEventStruct *event = g_new0(AtkKeyEventStruct, 1);
+ switch (key->type) {
+ case GDK_KEY_PRESS:
+ event->type = ATK_KEY_EVENT_PRESS;
+ break;
+ case GDK_KEY_RELEASE:
+ event->type = ATK_KEY_EVENT_RELEASE;
+ break;
+ default:
+ g_assert_not_reached ();
+ return nullptr;
+ }
+ event->state = key->state;
+ event->keyval = key->keyval;
+ event->length = key->length;
+ if (key->string && key->string [0] &&
+ (key->state & GDK_CONTROL_MASK ||
+ g_unichar_isgraph (g_utf8_get_char (key->string)))) {
+ event->string = key->string;
+ }
+ else if (key->type == GDK_KEY_PRESS ||
+ key->type == GDK_KEY_RELEASE) {
+ event->string = gdk_keyval_name (key->keyval);
+ }
+ event->keycode = key->hardware_keycode;
+ event->timestamp = key->time;
+
+ return event;
+}
+
+struct MaiKeyEventInfo
+{
+ AtkKeyEventStruct *key_event;
+ gpointer func_data;
+};
+
+union AtkKeySnoopFuncPointer
+{
+ AtkKeySnoopFunc func_ptr;
+ gpointer data;
+};
+
+static gboolean
+notify_hf(gpointer key, gpointer value, gpointer data)
+{
+ MaiKeyEventInfo *info = (MaiKeyEventInfo *)data;
+ AtkKeySnoopFuncPointer atkKeySnoop;
+ atkKeySnoop.data = value;
+ return (atkKeySnoop.func_ptr)(info->key_event, info->func_data) ? TRUE : FALSE;
+}
+
+static void
+insert_hf(gpointer key, gpointer value, gpointer data)
+{
+ GHashTable *new_table = (GHashTable *) data;
+ g_hash_table_insert (new_table, key, value);
+}
+
+static GHashTable* sKey_listener_list = nullptr;
+
+static gint
+mai_key_snooper(GtkWidget *the_widget, GdkEventKey *event, gpointer func_data)
+{
+ /* notify each AtkKeySnoopFunc in turn... */
+
+ MaiKeyEventInfo *info = g_new0(MaiKeyEventInfo, 1);
+ gint consumed = 0;
+ if (sKey_listener_list) {
+ GHashTable *new_hash = g_hash_table_new(nullptr, nullptr);
+ g_hash_table_foreach (sKey_listener_list, insert_hf, new_hash);
+ info->key_event = atk_key_event_from_gdk_event_key (event);
+ info->func_data = func_data;
+ consumed = g_hash_table_foreach_steal (new_hash, notify_hf, info);
+ g_hash_table_destroy (new_hash);
+ g_free(info->key_event);
+ }
+ g_free(info);
+ return (consumed ? 1 : 0);
+}
+
+static guint sKey_snooper_id = 0;
+
+static guint
+mai_util_add_key_event_listener(AtkKeySnoopFunc listener, gpointer data)
+{
+ if (MOZ_UNLIKELY(!listener)) {
+ return 0;
+ }
+
+ static guint key = 0;
+
+ if (!sKey_listener_list) {
+ sKey_listener_list = g_hash_table_new(nullptr, nullptr);
+ }
+
+ // If we have no registered event listeners then we need to (re)install the
+ // key event snooper.
+ if (g_hash_table_size(sKey_listener_list) == 0) {
+ sKey_snooper_id = gtk_key_snooper_install(mai_key_snooper, data);
+ }
+
+ AtkKeySnoopFuncPointer atkKeySnoop;
+ atkKeySnoop.func_ptr = listener;
+ key++;
+ g_hash_table_insert(sKey_listener_list, GUINT_TO_POINTER(key),
+ atkKeySnoop.data);
+ return key;
+}
+
+static void
+mai_util_remove_key_event_listener (guint remove_listener)
+{
+ if (!sKey_listener_list) {
+ // atk-bridge is initialized with gail (e.g. yelp)
+ // try gail_remove_key_event_listener
+ return gail_remove_key_event_listener(remove_listener);
+ }
+
+ g_hash_table_remove(sKey_listener_list, GUINT_TO_POINTER (remove_listener));
+ if (g_hash_table_size(sKey_listener_list) == 0) {
+ gtk_key_snooper_remove(sKey_snooper_id);
+ }
+}
+
+static AtkObject*
+mai_util_get_root()
+{
+ ApplicationAccessible* app = ApplicationAcc();
+ if (app)
+ return app->GetAtkObject();
+
+ // We've shutdown, try to use gail instead
+ // (to avoid assert in spi_atk_tidy_windows())
+ // XXX tbsaunde then why didn't we replace the gail atk_util impl?
+ if (gail_get_root)
+ return gail_get_root();
+
+ return nullptr;
+}
+
+static const gchar*
+mai_util_get_toolkit_name()
+{
+ return MAI_NAME;
+}
+
+static const gchar*
+mai_util_get_toolkit_version()
+{
+ return MAI_VERSION;
+}
+
+static void
+_listener_info_destroy(gpointer data)
+{
+ g_free(data);
+}
+
+static void
+window_added (AtkObject *atk_obj,
+ guint index,
+ AtkObject *child)
+{
+ if (!IS_MAI_OBJECT(child))
+ return;
+
+ static guint id = g_signal_lookup ("create", MAI_TYPE_ATK_OBJECT);
+ g_signal_emit (child, id, 0);
+}
+
+static void
+window_removed (AtkObject *atk_obj,
+ guint index,
+ AtkObject *child)
+{
+ if (!IS_MAI_OBJECT(child))
+ return;
+
+ static guint id = g_signal_lookup ("destroy", MAI_TYPE_ATK_OBJECT);
+ g_signal_emit (child, id, 0);
+}
+
+ static void
+UtilInterfaceInit(MaiUtilClass* klass)
+{
+ AtkUtilClass *atk_class;
+ gpointer data;
+
+ data = g_type_class_peek(ATK_TYPE_UTIL);
+ atk_class = ATK_UTIL_CLASS(data);
+
+ // save gail function pointer
+ gail_add_global_event_listener = atk_class->add_global_event_listener;
+ gail_remove_global_event_listener = atk_class->remove_global_event_listener;
+ gail_remove_key_event_listener = atk_class->remove_key_event_listener;
+ gail_get_root = atk_class->get_root;
+
+ atk_class->add_global_event_listener =
+ mai_util_add_global_event_listener;
+ atk_class->remove_global_event_listener =
+ mai_util_remove_global_event_listener;
+ atk_class->add_key_event_listener = mai_util_add_key_event_listener;
+ atk_class->remove_key_event_listener = mai_util_remove_key_event_listener;
+ atk_class->get_root = mai_util_get_root;
+ atk_class->get_toolkit_name = mai_util_get_toolkit_name;
+ atk_class->get_toolkit_version = mai_util_get_toolkit_version;
+
+ sListener_list = g_hash_table_new_full(g_int_hash, g_int_equal, nullptr,
+ _listener_info_destroy);
+ // Keep track of added/removed windows.
+ AtkObject *root = atk_get_root ();
+ g_signal_connect (root, "children-changed::add", (GCallback) window_added, nullptr);
+ g_signal_connect (root, "children-changed::remove", (GCallback) window_removed, nullptr);
+}
+}
+
+GType
+mai_util_get_type()
+{
+ static GType type = 0;
+
+ if (!type) {
+ static const GTypeInfo tinfo = {
+ sizeof(MaiUtilClass),
+ (GBaseInitFunc) nullptr, /* base init */
+ (GBaseFinalizeFunc) nullptr, /* base finalize */
+ (GClassInitFunc) UtilInterfaceInit, /* class init */
+ (GClassFinalizeFunc) nullptr, /* class finalize */
+ nullptr, /* class data */
+ sizeof(MaiUtil), /* instance size */
+ 0, /* nb preallocs */
+ (GInstanceInitFunc) nullptr, /* instance init */
+ nullptr /* value table */
+ };
+
+ type = g_type_register_static(ATK_TYPE_UTIL,
+ "MaiUtil", &tinfo, GTypeFlags(0));
+ }
+ return type;
+}
+