accessible/atk/nsMaiInterfaceHypertext.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "InterfaceInitFuncs.h"
   8
   9 #include "LocalAccessible-inl.h"
  10 #include "HyperTextAccessible.h"
  11 #include "nsMai.h"
  12 #include "nsMaiHyperlink.h"
  13 #include "RemoteAccessible.h"
  14 #include "mozilla/Likely.h"
  15
  16 using namespace mozilla::a11y;
  17
  18 extern "C" {
  19
  20 static AtkHyperlink* getLinkCB(AtkHypertext* aText, gint aLinkIndex) {
  21   if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
  22     if (HyperTextAccessibleBase* hyperText = acc->AsHyperTextBase()) {
  23       Accessible* linkAcc = hyperText->LinkAt(aLinkIndex);
  24       AtkObject* atkHyperLink = GetWrapperFor(linkAcc);
  25       NS_ENSURE_TRUE(IS_MAI_OBJECT(atkHyperLink), nullptr);
  26       return MAI_ATK_OBJECT(atkHyperLink)->GetAtkHyperlink();
  27     }
  28   }
  29
  30   return nullptr;
  31 }
  32
  33 static gint getLinkCountCB(AtkHypertext* aText) {
  34   if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
  35     if (HyperTextAccessibleBase* hyperText = acc->AsHyperTextBase()) {
  36       return static_cast<gint>(hyperText->LinkCount());
  37     }
  38   }
  39   return -1;
  40 }
  41
  42 static gint getLinkIndexCB(AtkHypertext* aText, gint aCharIndex) {
  43   Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
  44   if (!acc) {
  45     return -1;
  46   }
  47   HyperTextAccessibleBase* hyperText = acc->AsHyperTextBase();
  48   if (!hyperText) {
  49     return -1;
  50   }
  51   return hyperText->LinkIndexAtOffset(aCharIndex);
  52 }
  53
  54 }  // extern "C"
  55
  56 void hypertextInterfaceInitCB(AtkHypertextIface* aIface) {
  57   NS_ASSERTION(aIface, "no interface!");
  58   if (MOZ_UNLIKELY(!aIface)) return;
  59
  60   aIface->get_link = getLinkCB;
  61   aIface->get_n_links = getLinkCountCB;
  62   aIface->get_link_index = getLinkIndexCB;
  63 }