Add m-esr52 at 52.6.0

1 files changed, 629 insertions, 0 deletions

diff --git a/accessible/atk/nsMaiInterfaceText.cpp b/accessible/atk/nsMaiInterfaceText.cpp
new file mode 100644
index 000000000..1982f3730
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceText.cpp
@@ -0,0 +1,629 @@
+/* -*- 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 "InterfaceInitFuncs.h"
+#include "mozilla/a11y/PDocAccessible.h"
+#include "Accessible-inl.h"
+#include "HyperTextAccessible-inl.h"
+#include "nsMai.h"
+#include "ProxyAccessible.h"
+
+#include "nsIAccessibleTypes.h"
+#include "nsIPersistentProperties2.h"
+#include "nsISimpleEnumerator.h"
+
+#include "mozilla/Likely.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+static const char* sAtkTextAttrNames[ATK_TEXT_ATTR_LAST_DEFINED];
+
+void
+ConvertTextAttributeToAtkAttribute(const nsACString& aName,
+                                   const nsAString& aValue,
+                                   AtkAttributeSet** aAttributeSet)
+{
+  // Handle attributes where atk has its own name.
+  const char* atkName = nullptr;
+  nsAutoString atkValue;
+  if (aName.EqualsLiteral("color")) {
+    // The format of the atk attribute is r,g,b and the gecko one is
+    // rgb(r, g, b).
+    atkValue = Substring(aValue, 4, aValue.Length() - 5);
+    atkValue.StripWhitespace();
+    atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FG_COLOR];
+  } else if (aName.EqualsLiteral("background-color")) {
+    // The format of the atk attribute is r,g,b and the gecko one is
+    // rgb(r, g, b).
+    atkValue = Substring(aValue, 4, aValue.Length() - 5);
+    atkValue.StripWhitespace();
+    atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_BG_COLOR];
+  } else if (aName.EqualsLiteral("font-family")) {
+    atkValue = aValue;
+    atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FAMILY_NAME];
+  } else if (aName.EqualsLiteral("font-size")) {
+    // ATK wants the number of pixels without px at the end.
+    atkValue = StringHead(aValue, aValue.Length() - 2);
+    atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_SIZE];
+  } else if (aName.EqualsLiteral("font-weight")) {
+    atkValue = aValue;
+    atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_WEIGHT];
+  } else if (aName.EqualsLiteral("invalid")) {
+    atkValue = aValue;
+    atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_INVALID];
+  }
+
+  if (atkName) {
+    AtkAttribute* objAttr =
+      static_cast<AtkAttribute*>(g_malloc(sizeof(AtkAttribute)));
+    objAttr->name = g_strdup(atkName);
+    objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(atkValue).get());
+    *aAttributeSet = g_slist_prepend(*aAttributeSet, objAttr);
+  }
+}
+
+static AtkAttributeSet*
+ConvertToAtkTextAttributeSet(nsTArray<Attribute>& aAttributes)
+{
+  AtkAttributeSet* objAttributeSet = nullptr;
+  for (size_t i = 0; i < aAttributes.Length(); ++i) {
+    AtkAttribute* objAttr = (AtkAttribute *)g_malloc(sizeof(AtkAttribute));
+    objAttr->name = g_strdup(aAttributes[i].Name().get());
+    objAttr->value =
+      g_strdup(NS_ConvertUTF16toUTF8(aAttributes[i].Value()).get());
+    objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
+    ConvertTextAttributeToAtkAttribute(aAttributes[i].Name(),
+                                       aAttributes[i].Value(),
+                                       &objAttributeSet);
+  }
+  return objAttributeSet;
+}
+
+static AtkAttributeSet*
+ConvertToAtkTextAttributeSet(nsIPersistentProperties* aAttributes)
+{
+  if (!aAttributes)
+    return nullptr;
+
+  AtkAttributeSet* objAttributeSet = nullptr;
+  nsCOMPtr<nsISimpleEnumerator> propEnum;
+  nsresult rv = aAttributes->Enumerate(getter_AddRefs(propEnum));
+  NS_ENSURE_SUCCESS(rv, nullptr);
+
+  bool hasMore = false;
+  while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
+    nsCOMPtr<nsISupports> sup;
+    rv = propEnum->GetNext(getter_AddRefs(sup));
+    NS_ENSURE_SUCCESS(rv, objAttributeSet);
+
+    nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(sup));
+    NS_ENSURE_TRUE(propElem, objAttributeSet);
+
+    nsAutoCString name;
+    rv = propElem->GetKey(name);
+    NS_ENSURE_SUCCESS(rv, objAttributeSet);
+
+    nsAutoString value;
+    rv = propElem->GetValue(value);
+    NS_ENSURE_SUCCESS(rv, objAttributeSet);
+
+    AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
+    objAttr->name = g_strdup(name.get());
+    objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
+    objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
+
+    ConvertTextAttributeToAtkAttribute(name, value, &objAttributeSet);
+  }
+
+  // libatk-adaptor will free it
+  return objAttributeSet;
+}
+
+static void
+ConvertTexttoAsterisks(AccessibleWrap* accWrap, nsAString& aString)
+{
+  // convert each char to "*" when it's "password text" 
+  if (accWrap->NativeRole() == roles::PASSWORD_TEXT) {
+    for (uint32_t i = 0; i < aString.Length(); i++)
+      aString.Replace(i, 1, NS_LITERAL_STRING("*"));
+  }
+}
+
+extern "C" {
+
+static gchar*
+getTextCB(AtkText *aText, gint aStartOffset, gint aEndOffset)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  nsAutoString autoStr;
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole())
+      return nullptr;
+
+    text->TextSubstring(aStartOffset, aEndOffset, autoStr);
+
+    ConvertTexttoAsterisks(accWrap, autoStr);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    proxy->TextSubstring(aStartOffset, aEndOffset, autoStr);
+  }
+
+  NS_ConvertUTF16toUTF8 cautoStr(autoStr);
+
+  //copy and return, libspi will free it.
+  return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
+}
+
+static gchar*
+getTextAfterOffsetCB(AtkText *aText, gint aOffset,
+                     AtkTextBoundary aBoundaryType,
+                     gint *aStartOffset, gint *aEndOffset)
+{
+    nsAutoString autoStr;
+  int32_t startOffset = 0, endOffset = 0;
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole())
+      return nullptr;
+
+    text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
+    ConvertTexttoAsterisks(accWrap, autoStr);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    proxy->GetTextAfterOffset(aOffset, aBoundaryType, autoStr, &startOffset,
+                              &endOffset);
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  NS_ConvertUTF16toUTF8 cautoStr(autoStr);
+  return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
+}
+
+static gchar*
+getTextAtOffsetCB(AtkText *aText, gint aOffset,
+                  AtkTextBoundary aBoundaryType,
+                  gint *aStartOffset, gint *aEndOffset)
+{
+  nsAutoString autoStr;
+  int32_t startOffset = 0, endOffset = 0;
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole())
+      return nullptr;
+
+    text->TextAtOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
+    ConvertTexttoAsterisks(accWrap, autoStr);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    proxy->GetTextAtOffset(aOffset, aBoundaryType, autoStr, &startOffset,
+                           &endOffset);
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  NS_ConvertUTF16toUTF8 cautoStr(autoStr);
+  return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
+}
+
+static gunichar
+getCharacterAtOffsetCB(AtkText* aText, gint aOffset)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return 0;
+    }
+
+    // char16_t is unsigned short in Mozilla, gnuichar is guint32 in glib.
+    return static_cast<gunichar>(text->CharAt(aOffset));
+  }
+
+  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return static_cast<gunichar>(proxy->CharAt(aOffset));
+  }
+
+  return 0;
+}
+
+static gchar*
+getTextBeforeOffsetCB(AtkText *aText, gint aOffset,
+                      AtkTextBoundary aBoundaryType,
+                      gint *aStartOffset, gint *aEndOffset)
+{
+  nsAutoString autoStr;
+  int32_t startOffset = 0, endOffset = 0;
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole())
+      return nullptr;
+
+    text->TextBeforeOffset(aOffset, aBoundaryType,
+                           &startOffset, &endOffset, autoStr);
+    ConvertTexttoAsterisks(accWrap, autoStr);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    proxy->GetTextBeforeOffset(aOffset, aBoundaryType, autoStr, &startOffset,
+                               &endOffset);
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  NS_ConvertUTF16toUTF8 cautoStr(autoStr);
+  return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
+}
+
+static gint
+getCaretOffsetCB(AtkText *aText)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return 0;
+    }
+
+    return static_cast<gint>(text->CaretOffset());
+  }
+
+  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return static_cast<gint>(proxy->CaretOffset());
+  }
+
+  return 0;
+}
+
+static AtkAttributeSet*
+getRunAttributesCB(AtkText *aText, gint aOffset,
+                   gint *aStartOffset,
+                   gint *aEndOffset)
+{
+  *aStartOffset = -1;
+  *aEndOffset = -1;
+  int32_t startOffset = 0, endOffset = 0;
+
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return nullptr;
+    }
+
+    nsCOMPtr<nsIPersistentProperties> attributes =
+      text->TextAttributes(false, aOffset, &startOffset, &endOffset);
+
+    *aStartOffset = startOffset;
+    *aEndOffset = endOffset;
+
+    return ConvertToAtkTextAttributeSet(attributes);
+  }
+
+  ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText));
+  if (!proxy) {
+    return nullptr;
+  }
+
+  AutoTArray<Attribute, 10> attrs;
+  proxy->TextAttributes(false, aOffset, &attrs, &startOffset, &endOffset);
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+  return ConvertToAtkTextAttributeSet(attrs);
+}
+
+static AtkAttributeSet*
+getDefaultAttributesCB(AtkText *aText)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return nullptr;
+    }
+
+    nsCOMPtr<nsIPersistentProperties> attributes = text->DefaultTextAttributes();
+    return ConvertToAtkTextAttributeSet(attributes);
+  }
+
+  ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText));
+  if (!proxy) {
+    return nullptr;
+  }
+
+  AutoTArray<Attribute, 10> attrs;
+  proxy->DefaultTextAttributes(&attrs);
+  return ConvertToAtkTextAttributeSet(attrs);
+}
+
+static void
+getCharacterExtentsCB(AtkText *aText, gint aOffset,
+                      gint *aX, gint *aY,
+                      gint *aWidth, gint *aHeight,
+                      AtkCoordType aCoords)
+{
+  if(!aX || !aY || !aWidth || !aHeight) {
+    return;
+  }
+
+  nsIntRect rect;
+  uint32_t geckoCoordType;
+  if (aCoords == ATK_XY_SCREEN) {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
+  } else {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
+  }
+
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return;
+    }
+
+    rect = text->CharBounds(aOffset, geckoCoordType);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    rect = proxy->CharBounds(aOffset, geckoCoordType);
+  } else {
+    return;
+  }
+
+  *aX = rect.x;
+  *aY = rect.y;
+  *aWidth = rect.width;
+  *aHeight = rect.height;
+}
+
+static void
+getRangeExtentsCB(AtkText *aText, gint aStartOffset, gint aEndOffset,
+                  AtkCoordType aCoords, AtkTextRectangle *aRect)
+{
+  if (!aRect) {
+    return;
+  }
+
+  nsIntRect rect;
+  uint32_t geckoCoordType;
+  if (aCoords == ATK_XY_SCREEN) {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
+  } else {
+    geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
+  }
+
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if(accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return;
+    }
+
+    rect = text->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    rect = proxy->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
+  } else {
+    return;
+  }
+
+  aRect->x = rect.x;
+  aRect->y = rect.y;
+  aRect->width = rect.width;
+  aRect->height = rect.height;
+}
+
+static gint
+getCharacterCountCB(AtkText *aText)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* textAcc = accWrap->AsHyperText();
+    return
+      textAcc->IsDefunct() ? 0 : static_cast<gint>(textAcc->CharacterCount());
+  }
+
+  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->CharacterCount();
+  }
+
+  return 0;
+}
+
+static gint
+getOffsetAtPointCB(AtkText *aText,
+                   gint aX, gint aY,
+                   AtkCoordType aCoords)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return -1;
+    }
+
+    return static_cast<gint>(
+      text->OffsetAtPoint(aX, aY,
+                          (aCoords == ATK_XY_SCREEN ?
+                           nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
+                           nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE)));
+  }
+
+  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return static_cast<gint>(
+      proxy->OffsetAtPoint(aX, aY,
+                           (aCoords == ATK_XY_SCREEN ?
+                            nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
+                            nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE)));
+  }
+
+  return -1;
+}
+
+static gint
+getTextSelectionCountCB(AtkText *aText)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return 0;
+    }
+
+    return text->SelectionCount();
+  }
+
+  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->SelectionCount();
+  }
+
+  return 0;
+}
+
+static gchar*
+getTextSelectionCB(AtkText *aText, gint aSelectionNum,
+                   gint *aStartOffset, gint *aEndOffset)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  int32_t startOffset = 0, endOffset = 0;
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return nullptr;
+    }
+
+    text->SelectionBoundsAt(aSelectionNum, &startOffset, &endOffset);
+    *aStartOffset = startOffset;
+    *aEndOffset = endOffset;
+
+    return getTextCB(aText, *aStartOffset, *aEndOffset);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    nsString data;
+    proxy->SelectionBoundsAt(aSelectionNum, data, &startOffset, &endOffset);
+    *aStartOffset = startOffset;
+    *aEndOffset = endOffset;
+
+    NS_ConvertUTF16toUTF8 dataAsUTF8(data);
+    return (dataAsUTF8.get()) ? g_strdup(dataAsUTF8.get()) : nullptr;
+  }
+  return nullptr;
+}
+
+// set methods
+static gboolean
+addTextSelectionCB(AtkText *aText,
+                   gint aStartOffset,
+                   gint aEndOffset)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return FALSE;
+    }
+
+    return text->AddToSelection(aStartOffset, aEndOffset);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->AddToSelection(aStartOffset, aEndOffset);
+  }
+
+  return FALSE;
+}
+
+static gboolean
+removeTextSelectionCB(AtkText *aText,
+                      gint aSelectionNum)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return FALSE;
+    }
+
+    return text->RemoveFromSelection(aSelectionNum);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->RemoveFromSelection(aSelectionNum);
+  }
+
+  return FALSE;
+}
+
+static gboolean
+setTextSelectionCB(AtkText *aText, gint aSelectionNum,
+                   gint aStartOffset, gint aEndOffset)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole()) {
+      return FALSE;
+    }
+
+    return text->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
+  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    return proxy->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
+  }
+
+  return FALSE;
+}
+
+static gboolean
+setCaretOffsetCB(AtkText *aText, gint aOffset)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
+  if (accWrap) {
+    HyperTextAccessible* text = accWrap->AsHyperText();
+    if (!text || !text->IsTextRole() || !text->IsValidOffset(aOffset)) {
+      return FALSE;
+    }
+
+    text->SetCaretOffset(aOffset);
+    return TRUE;
+  }
+
+  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
+    proxy->SetCaretOffset(aOffset);
+    return TRUE;
+  }
+
+  return FALSE;
+}
+}
+
+void
+textInterfaceInitCB(AtkTextIface* aIface)
+{
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface))
+    return;
+
+  aIface->get_text = getTextCB;
+  aIface->get_text_after_offset = getTextAfterOffsetCB;
+  aIface->get_text_at_offset = getTextAtOffsetCB;
+  aIface->get_character_at_offset = getCharacterAtOffsetCB;
+  aIface->get_text_before_offset = getTextBeforeOffsetCB;
+  aIface->get_caret_offset = getCaretOffsetCB;
+  aIface->get_run_attributes = getRunAttributesCB;
+  aIface->get_default_attributes = getDefaultAttributesCB;
+  aIface->get_character_extents = getCharacterExtentsCB;
+  aIface->get_range_extents = getRangeExtentsCB;
+  aIface->get_character_count = getCharacterCountCB;
+  aIface->get_offset_at_point = getOffsetAtPointCB;
+  aIface->get_n_selections = getTextSelectionCountCB;
+  aIface->get_selection = getTextSelectionCB;
+
+    // set methods
+  aIface->add_selection = addTextSelectionCB;
+  aIface->remove_selection = removeTextSelectionCB;
+  aIface->set_selection = setTextSelectionCB;
+  aIface->set_caret_offset = setCaretOffsetCB;
+
+  // Cache the string values of the atk text attribute names.
+  for (uint32_t i = 0; i < ArrayLength(sAtkTextAttrNames); i++)
+    sAtkTextAttrNames[i] =
+      atk_text_attribute_get_name(static_cast<AtkTextAttribute>(i));
+}