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[gtk/wip/ebassi/a11y-2: 440/442] a11y: Implement GtkPasswordEntryAccessible properly

commit e63419fbf4f26ab45e9403026b32537029d75888
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Jun 5 20:15:28 2020 +0100

    a11y: Implement GtkPasswordEntryAccessible properly
    
    GtkPasswordEntryAccessible is not a GtkEntryAccessible any more, so it
    will need a proper implementation of various interfaces and
    functionality in order to work like any other entry.

 gtk/a11y/gtkpasswordentryaccessible.c        | 614 ++++++++++++++++++++++++++-
 gtk/a11y/gtkpasswordentryaccessible.h        |   2 +-
 gtk/a11y/gtkpasswordentryaccessibleprivate.h |  29 ++
 gtk/gtkpasswordentry.c                       |  19 +-
 gtk/gtkpasswordentryprivate.h                |  30 ++
 5 files changed, 688 insertions(+), 6 deletions(-)
---
diff --git a/gtk/a11y/gtkpasswordentryaccessible.c b/gtk/a11y/gtkpasswordentryaccessible.c
index 5cdce35512..d071e049e0 100644
--- a/gtk/a11y/gtkpasswordentryaccessible.c
+++ b/gtk/a11y/gtkpasswordentryaccessible.c
@@ -20,20 +20,615 @@
 
 #include "config.h"
 
-#include "gtkpasswordentryaccessible.h"
+#include "gtkpasswordentryaccessibleprivate.h"
 
+#include "gtkeditable.h"
+#include "gtkimage.h"
 #include "gtkintl.h"
+#include "gtklabel.h"
+#include "gtkpango.h"
+#include "gtkpasswordentryprivate.h"
+#include "gtkstylecontextprivate.h"
+#include "gtktextprivate.h"
 
 struct _GtkPasswordEntryAccessible
 {
-  GtkEntryAccessible parent_instance;
+  GtkWidgetAccessible parent_instance;
+
+  int cursor_position;
+  int selection_bound;
 };
 
-G_DEFINE_TYPE (GtkPasswordEntryAccessible, gtk_password_entry_accessible, GTK_TYPE_ENTRY_ACCESSIBLE)
+static void atk_editable_text_interface_init (AtkEditableTextIface *iface);
+static void atk_text_interface_init (AtkTextIface *iface);
+static void atk_action_interface_init (AtkActionIface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (GtkPasswordEntryAccessible, gtk_password_entry_accessible, 
GTK_TYPE_WIDGET_ACCESSIBLE,
+                         G_IMPLEMENT_INTERFACE (ATK_TYPE_EDITABLE_TEXT, atk_editable_text_interface_init)
+                         G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init)
+                         G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init))
+
+static inline GtkText *
+get_text_widget (GtkAccessible *accessible)
+{
+  GtkWidget *widget = gtk_accessible_get_widget (accessible);
+
+  if (widget == NULL)
+    return NULL;
+
+  GtkPasswordEntry *entry = GTK_PASSWORD_ENTRY (widget);
+
+  return gtk_password_entry_get_text_widget (entry);
+}
+
+static gunichar
+gtk_password_entry_accessible_get_character_at_offset (AtkText *atk_text,
+                                                       gint     offset)
+{
+  GtkText *text = get_text_widget (GTK_ACCESSIBLE (atk_text));
+  char *contents, *index;
+  gunichar result;
+
+  result = '\0';
+
+  text = get_text_widget (GTK_ACCESSIBLE (atk_text));
+  if (text == NULL)
+    return 0;
+
+  if (!gtk_text_get_visibility (text))
+    return result;
+
+  contents = gtk_text_get_display_text (text, 0, -1);
+  if (offset < g_utf8_strlen (contents, -1))
+    {
+      index = g_utf8_offset_to_pointer (contents, offset);
+      result = g_utf8_get_char (index);
+      g_free (contents);
+    }
+
+  return result;
+}
+
+static gint
+gtk_password_entry_accessible_get_caret_offset (AtkText *atk_text)
+{
+  GtkWidget *widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
+
+  if (widget == NULL)
+    return -1;
+
+  int cursor_position = 0;
+  gboolean result = gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), NULL, &cursor_position);
+  if (!result)
+    return -1;
+
+  return cursor_position;
+}
+
+static gboolean
+gtk_password_entry_accessible_set_caret_offset (AtkText *atk_text,
+                                                gint     offset)
+{
+  GtkWidget *widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (atk_text));
+  if (widget == NULL)
+    return FALSE;
+
+  gtk_editable_set_position (GTK_EDITABLE (widget), offset);
+
+  return TRUE;
+}
+
+static gint
+gtk_password_entry_accessible_get_character_count (AtkText *atk_text)
+{
+  GtkText *text = get_text_widget (GTK_ACCESSIBLE (atk_text));
+  if (text == NULL)
+    return 0;
+
+  char *display_text = gtk_text_get_display_text (text, 0, -1);
+
+  int char_count = 0;
+  if (display_text)
+    {
+      char_count = g_utf8_strlen (display_text, -1);
+      g_free (display_text);
+    }
+
+  return char_count;
+}
+
+static gint
+gtk_password_entry_accessible_get_offset_at_point (AtkText      *atk_text,
+                                                   gint          x,
+                                                   gint          y,
+                                                   AtkCoordType  coords)
+{
+  GtkText *text = get_text_widget (GTK_ACCESSIBLE (atk_text));
+  int index, x_layout, y_layout;
+  int x_local, y_local;
+  glong offset;
+
+  if (text == NULL)
+    return 1;
+
+  gtk_text_get_layout_offsets (text, &x_layout, &y_layout);
+
+  x_local = x - x_layout;
+  y_local = y - y_layout;
+
+  if (!pango_layout_xy_to_index (gtk_text_get_layout (text),
+                                 x_local * PANGO_SCALE,
+                                 y_local * PANGO_SCALE,
+                                 &index, NULL))
+    {
+      if (x_local < 0 || y_local < 0)
+        index = 0;
+      else
+        index = -1;
+    }
+
+  offset = -1;
+  if (index != -1)
+    {
+      char *entry_text = gtk_text_get_display_text (text, 0, -1);
+      offset = g_utf8_pointer_to_offset (entry_text, entry_text + index);
+      g_free (entry_text);
+    }
+
+  return offset;
+}
+
+static void
+atk_text_interface_init (AtkTextIface *iface)
+{
+  iface->get_character_at_offset = gtk_password_entry_accessible_get_character_at_offset;
+  iface->get_caret_offset = gtk_password_entry_accessible_get_caret_offset;
+  iface->set_caret_offset = gtk_password_entry_accessible_set_caret_offset;
+  iface->get_character_count = gtk_password_entry_accessible_get_character_count;
+  iface->get_offset_at_point = gtk_password_entry_accessible_get_offset_at_point;
+}
+
+static void
+gtk_password_entry_accessible_set_text_contents (AtkEditableText *text,
+                                                 const gchar     *string)
+{
+  GtkWidget *widget;
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
+  if (widget == NULL)
+    return;
+
+  if (!gtk_editable_get_editable (GTK_EDITABLE (widget)))
+    return;
+
+  gtk_editable_set_text (GTK_EDITABLE (widget), string);
+}
+
+static void
+gtk_password_entry_accessible_insert_text (AtkEditableText *text,
+                                           const gchar     *string,
+                                           gint             length,
+                                           gint            *position)
+{
+  GtkWidget *widget;
+  GtkEditable *editable;
+  int pos = 0;
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
+  if (widget == NULL)
+    return;
+
+  editable = GTK_EDITABLE (widget);
+  if (!gtk_editable_get_editable (editable))
+    return;
+
+  if (position != NULL)
+    pos = *position;
+
+  gtk_editable_insert_text (editable, string, length, &pos);
+  gtk_editable_set_position (editable, pos);
+
+  if (position != NULL)
+    *position = pos;
+}
+
+static void
+gtk_password_entry_accessible_delete_text (AtkEditableText *text,
+                                           gint             start_pos,
+                                           gint             end_pos)
+{
+  GtkWidget *widget;
+  GtkEditable *editable;
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
+  if (widget == NULL)
+    return;
+
+  editable = GTK_EDITABLE (widget);
+  if (!gtk_editable_get_editable (editable))
+    return;
+
+  gtk_editable_delete_text (editable, start_pos, end_pos);
+}
+
+typedef struct
+{
+  GtkEditable *entry;
+  int position;
+} PasteData;
+
+static void
+paste_received_cb (GObject      *clipboard,
+                   GAsyncResult *result,
+                   gpointer      data)
+{
+  PasteData *paste = data;
+  char *text;
+
+  text = gdk_clipboard_read_text_finish (GDK_CLIPBOARD (clipboard), result, NULL);
+  if (text != NULL)
+    gtk_editable_insert_text (paste->entry,
+                              text, -1,
+                              &(paste->position));
+
+  g_object_unref (paste->entry);
+  g_free (paste);
+  g_free (text);
+}
+
+static void
+gtk_password_entry_accessible_paste_text (AtkEditableText *text,
+                                          gint             position)
+{
+  GtkWidget *widget;
+  GtkEditable *editable;
+  PasteData *paste;
+  GdkClipboard *clipboard;
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (text));
+  if (widget == NULL)
+    return;
+
+  editable = GTK_EDITABLE (widget);
+  if (!gtk_editable_get_editable (editable))
+    return;
+
+  paste = g_new0 (PasteData, 1);
+  paste->entry = GTK_EDITABLE (widget);
+  paste->position = position;
+
+  g_object_ref (paste->entry);
+  clipboard = gtk_widget_get_clipboard (widget);
+  gdk_clipboard_read_text_async (clipboard, NULL, paste_received_cb, paste);
+}
+
+static void
+atk_editable_text_interface_init (AtkEditableTextIface *iface)
+{
+  iface->set_text_contents = gtk_password_entry_accessible_set_text_contents;
+  iface->insert_text = gtk_password_entry_accessible_insert_text;
+  iface->copy_text = NULL;
+  iface->cut_text = NULL;
+  iface->delete_text = gtk_password_entry_accessible_delete_text;
+  iface->paste_text = gtk_password_entry_accessible_paste_text;
+  iface->set_run_attributes = NULL;
+}
+
+static gboolean
+gtk_password_entry_accessible_do_action (AtkAction *action,
+                                         gint       i)
+{
+  GtkWidget *widget;
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
+  if (widget == NULL)
+    return FALSE;
+
+  if (!gtk_widget_get_sensitive (widget) || !gtk_widget_get_visible (widget))
+    return FALSE;
+
+  if (i == 0)
+    {
+      gtk_widget_activate (widget);
+      return TRUE;
+    }
+
+  if (i == 1)
+    {
+      GtkText *text = get_text_widget (GTK_ACCESSIBLE (action));
+
+      gboolean visibility = gtk_text_get_visibility (text);
+      gtk_text_set_visibility (text, !visibility);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static gint
+gtk_password_entry_accessible_get_n_actions (AtkAction *action)
+{
+  GtkAccessible *accessible = GTK_ACCESSIBLE (action);
+
+  GtkWidget *widget = gtk_accessible_get_widget (accessible);
+  if (widget == NULL)
+    return 0;
+
+  int n_actions = 1;
+  if (gtk_password_entry_get_show_peek_icon (GTK_PASSWORD_ENTRY (widget)))
+    n_actions += 1;
+
+  return n_actions;
+}
+
+static const gchar *
+gtk_password_entry_accessible_get_keybinding (AtkAction *action,
+                                              gint       i)
+{
+  GtkWidget *widget;
+  GtkWidget *label;
+  AtkRelationSet *set;
+  AtkRelation *relation;
+  GPtrArray *target;
+  gpointer target_object;
+  guint key_val;
+
+  if (i != 0)
+    return NULL;
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
+  if (widget == NULL)
+    return NULL;
+
+  set = atk_object_ref_relation_set (ATK_OBJECT (action));
+  if (!set)
+    return NULL;
+
+  label = NULL;
+  relation = atk_relation_set_get_relation_by_type (set, ATK_RELATION_LABELLED_BY);
+  if (relation)
+    {
+      target = atk_relation_get_target (relation);
+
+      target_object = g_ptr_array_index (target, 0);
+      label = gtk_accessible_get_widget (GTK_ACCESSIBLE (target_object));
+    }
+
+  g_object_unref (set);
+
+  if (GTK_IS_LABEL (label))
+    {
+      key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (label));
+      if (key_val != GDK_KEY_VoidSymbol)
+        return gtk_accelerator_name (key_val, GDK_ALT_MASK);
+    }
+
+  return NULL;
+}
+
+static const gchar *
+gtk_password_entry_accessible_action_get_name (AtkAction *action,
+                                               gint       i)
+{
+  switch (i)
+    {
+    case 0:
+      return "activate";
+
+    case 1:
+      return "peek";
+
+    default:
+      break;
+    }
+
+  return NULL;
+}
+
+static const gchar*
+gtk_password_entry_accessible_action_get_localized_name (AtkAction *action,
+                                                         gint       i)
+{
+  if (i == 0)
+    return C_("Action name", "Activate");
+  if (i == 1)
+    return C_("Action name", "Peek");
+
+  return NULL;
+}
+
+static const gchar *
+gtk_password_entry_accessible_action_get_description (AtkAction *action,
+                                                      gint       i)
+{
+  if (i == 0)
+    return C_("Action description", "Activates the entry");
+
+  if (i == 1)
+    return C_("Action description", "Reveals the contents the entry");
+
+  return NULL;
+}
+
+static void
+atk_action_interface_init (AtkActionIface *iface)
+{
+  iface->do_action = gtk_password_entry_accessible_do_action;
+  iface->get_n_actions = gtk_password_entry_accessible_get_n_actions;
+  iface->get_keybinding = gtk_password_entry_accessible_get_keybinding;
+  iface->get_name = gtk_password_entry_accessible_action_get_name;
+  iface->get_localized_name = gtk_password_entry_accessible_action_get_localized_name;
+  iface->get_description = gtk_password_entry_accessible_action_get_description;
+}
+
+static AtkAttributeSet *
+gtk_password_entry_accessible_get_attributes (AtkObject *accessible)
+{
+  GtkWidget *widget;
+  AtkAttributeSet *attributes;
+  AtkAttribute *placeholder_text;
+  char *text = NULL;
+
+  attributes = ATK_OBJECT_CLASS (gtk_password_entry_accessible_parent_class)->get_attributes (accessible);
+
+  widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
+  if (widget == NULL)
+    return attributes;
+
+  g_object_get (widget, "placeholder-text", &text, NULL);
+  if (text == NULL)
+    return attributes;
+
+  placeholder_text = g_malloc (sizeof (AtkAttribute));
+  placeholder_text->name = g_strdup ("placeholder-text");
+  placeholder_text->value = text;
+
+  attributes = g_slist_append (attributes, placeholder_text);
+
+  return attributes;
+}
+
+static gboolean
+check_for_selection_change (GtkPasswordEntryAccessible *self,
+                            GtkEditable                *editable)
+{
+  gboolean ret_val = FALSE;
+  gint start, end;
+
+  if (gtk_editable_get_selection_bounds (editable, &start, &end))
+    {
+      if (end != self->cursor_position ||
+          start != self->selection_bound)
+        /*
+         * This check is here as this function can be called
+         * for notification of selection_bound and current_pos.
+         * The values of current_pos and selection_bound may be the same
+         * for both notifications and we only want to generate one
+         * text_selection_changed signal.
+         */
+        ret_val = TRUE;
+    }
+  else
+    {
+      /* We had a selection */
+      ret_val = (self->cursor_position != self->selection_bound);
+    }
+
+  self->cursor_position = end;
+  self->selection_bound = start;
+
+  return ret_val;
+}
+
+static void
+on_cursor_position_changed (GObject    *gobject,
+                            GParamSpec *pspec,
+                            gpointer    data)
+{
+  GtkPasswordEntryAccessible *self = data;
+  GtkEditable *editable = GTK_EDITABLE (gobject);
+
+  if (check_for_selection_change (self, editable))
+    g_signal_emit_by_name (self, "text-selection-changed");
+
+  // The entry cursor position has moved so generate the signal
+  g_signal_emit_by_name (self, "text-caret-moved",
+                         gtk_editable_get_position (editable));
+}
+
+static void
+on_selection_bound_changed (GObject     *gobject,
+                            GParamSpec *pspec,
+                            gpointer    data)
+{
+  GtkPasswordEntryAccessible *self = data;
+  GtkEditable *editable = GTK_EDITABLE (gobject);
+
+  if (check_for_selection_change (self, editable))
+    g_signal_emit_by_name (self, "text-selection-changed");
+}
+
+static void
+insert_text_cb (GtkEditable                *editable,
+                gchar                      *new_text,
+                gint                        new_text_length,
+                gint                       *position,
+                GtkPasswordEntryAccessible *self)
+{
+  int length;
+
+  if (new_text_length == 0)
+    return;
+
+  length = g_utf8_strlen (new_text, new_text_length);
+
+  g_signal_emit_by_name (self,
+                         "text-changed::insert",
+                         *position - length,
+                          length);
+}
+
+static void
+delete_text_cb (GtkEditable                *editable,
+                gint                        start,
+                gint                        end,
+                GtkPasswordEntryAccessible *self)
+{
+  GtkText *text;
+
+  text = get_text_widget (GTK_ACCESSIBLE (self));
+  if (text == NULL)
+    return;
+
+  if (end < 0)
+    {
+      char *contents;
+
+      contents = gtk_text_get_display_text (text, 0, -1);
+      end = g_utf8_strlen (contents, -1);
+
+      g_free (contents);
+    }
+
+  if (end == start)
+    return;
+
+  g_signal_emit_by_name (self,
+                         "text-changed::delete",
+                         start,
+                         end - start);
+}
+
+static void
+gtk_password_entry_accessible_initialize (AtkObject *atk_object,
+                                          gpointer   data)
+{
+  GtkPasswordEntryAccessible *self = GTK_PASSWORD_ENTRY_ACCESSIBLE (atk_object);
+  GtkEditable *editable = data;
+  GtkWidget *widget = data;
+  int start_pos, end_pos;
+
+  gtk_editable_get_selection_bounds (editable, &start_pos, &end_pos);
+  self->cursor_position = end_pos;
+  self->selection_bound = start_pos;
+
+  /* Set up signal callbacks */
+  g_signal_connect_after (widget, "insert-text", G_CALLBACK (insert_text_cb), self);
+  g_signal_connect (widget, "delete-text", G_CALLBACK (delete_text_cb), self);
+  g_signal_connect (widget, "notify::cursor-position",
+                    G_CALLBACK (on_cursor_position_changed), self);
+  g_signal_connect (widget, "notify::selection-bound",
+                    G_CALLBACK (on_selection_bound_changed), self);
+}
 
 static void
 gtk_password_entry_accessible_class_init (GtkPasswordEntryAccessibleClass *klass)
 {
+  AtkObjectClass *atk_object_class = ATK_OBJECT_CLASS (klass);
+
+  atk_object_class->initialize = gtk_password_entry_accessible_initialize;
+  atk_object_class->get_attributes = gtk_password_entry_accessible_get_attributes;
 }
 
 static void
@@ -44,3 +639,16 @@ gtk_password_entry_accessible_init (GtkPasswordEntryAccessible *self)
   atk_obj->role = ATK_ROLE_PASSWORD_TEXT;
   atk_object_set_name (atk_obj, _("Password"));
 }
+
+void
+gtk_password_entry_accessible_update_visibility (GtkPasswordEntryAccessible *self)
+{
+  GtkText *text = get_text_widget (GTK_ACCESSIBLE (self));
+
+  if (text == NULL)
+    return;
+
+  gboolean visibility = gtk_text_get_visibility (text);
+  AtkRole role = visibility ? ATK_ROLE_TEXT : ATK_ROLE_PASSWORD_TEXT;
+  atk_object_set_role (ATK_OBJECT (self), role);
+}
diff --git a/gtk/a11y/gtkpasswordentryaccessible.h b/gtk/a11y/gtkpasswordentryaccessible.h
index 1fe210feb8..d1008426a8 100644
--- a/gtk/a11y/gtkpasswordentryaccessible.h
+++ b/gtk/a11y/gtkpasswordentryaccessible.h
@@ -37,7 +37,7 @@ typedef struct _GtkPasswordEntryAccessibleClass GtkPasswordEntryAccessibleClass;
 
 struct _GtkPasswordEntryAccessibleClass
 {
-  GtkEntryAccessibleClass parent_class;
+  GtkWidgetAccessibleClass parent_class;
 };
 
 GDK_AVAILABLE_IN_ALL
diff --git a/gtk/a11y/gtkpasswordentryaccessibleprivate.h b/gtk/a11y/gtkpasswordentryaccessibleprivate.h
new file mode 100644
index 0000000000..5ef1153814
--- /dev/null
+++ b/gtk/a11y/gtkpasswordentryaccessibleprivate.h
@@ -0,0 +1,29 @@
+/* gtkpasswordentryaccessibleprivate.h: Private API for GtkPasswordEntryAccessible
+ *
+ * Copyright 2020  GNOME Foundation
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "gtkpasswordentryaccessible.h"
+
+G_BEGIN_DECLS
+
+void gtk_password_entry_accessible_update_visibility (GtkPasswordEntryAccessible *self);
+
+G_END_DECLS
diff --git a/gtk/gtkpasswordentry.c b/gtk/gtkpasswordentry.c
index 99eaf0b39b..66acb6fa94 100644
--- a/gtk/gtkpasswordentry.c
+++ b/gtk/gtkpasswordentry.c
@@ -20,7 +20,7 @@
 
 #include "config.h"
 
-#include "gtkpasswordentry.h"
+#include "gtkpasswordentryprivate.h"
 
 #include "gtkaccessible.h"
 #include "gtktextprivate.h"
@@ -35,7 +35,7 @@
 #include "gtkstylecontext.h"
 #include "gtkeventcontrollerkey.h"
 
-#include "a11y/gtkpasswordentryaccessible.h"
+#include "a11y/gtkpasswordentryaccessibleprivate.h"
 
 /**
  * SECTION:gtkpasswordentry
@@ -116,6 +116,11 @@ gtk_password_entry_toggle_peek (GtkPasswordEntry *entry)
 
   visibility = gtk_text_get_visibility (GTK_TEXT (priv->entry));
   gtk_text_set_visibility (GTK_TEXT (priv->entry), !visibility);
+
+  /* Update the accessible object to reflect the change of visibility */
+  GtkAccessible *accessible = GTK_ACCESSIBLE (_gtk_widget_peek_accessible (GTK_WIDGET (entry)));
+  if (accessible != NULL)
+    gtk_password_entry_accessible_update_visibility (GTK_PASSWORD_ENTRY_ACCESSIBLE (accessible));
 }
 
 static void
@@ -430,6 +435,16 @@ gtk_password_entry_editable_init (GtkEditableInterface *iface)
   iface->get_delegate = gtk_password_entry_get_delegate;
 }
 
+GtkText *
+gtk_password_entry_get_text_widget (GtkPasswordEntry *entry)
+{
+  GtkPasswordEntryPrivate *priv = gtk_password_entry_get_instance_private (entry);
+
+  g_return_val_if_fail (GTK_IS_PASSWORD_ENTRY (entry), NULL);
+
+  return GTK_TEXT (priv->entry);
+}
+
 /**
  * gtk_password_entry_new:
  *
diff --git a/gtk/gtkpasswordentryprivate.h b/gtk/gtkpasswordentryprivate.h
new file mode 100644
index 0000000000..2daaaba4fb
--- /dev/null
+++ b/gtk/gtkpasswordentryprivate.h
@@ -0,0 +1,30 @@
+/* gtkpasswordentryprivate.h: Private API for GtkPasswordEntry
+ *
+ * Copyright 2020  GNOME Foundation
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "gtkpasswordentry.h"
+#include "gtktextprivate.h"
+
+G_BEGIN_DECLS
+
+GtkText *       gtk_password_entry_get_text_widget      (GtkPasswordEntry *entry);
+
+G_END_DECLS
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