accessible/atk/nsMaiInterfaceHypertext.cpp
author Ryan VanderMeulen <ryanvm@gmail.com>
Sat, 19 Mar 2016 15:16:30 -0400
changeset 351260 351882d470a769b8e185deeda24a4ddffb19c105
parent 259846 73233637e522f55411c63e2445cd6ca5a948fa96
child 489668 cbb8fdf1daf98a15f7d57f6b08d273bdf96aa1a0
child 648192 c236dfe7dc98c387219d7cb45d0693560db708fd
child 694109 98e2b4ee9775a2a2b5cc1bb8a390bfe901814f38
permissions -rw-r--r--
Bug 1252707. r=terrence a=lizzard MozReview-Commit-ID: EIjq93wa1nD

/* -*- 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 "Accessible-inl.h"
#include "HyperTextAccessible.h"
#include "nsMai.h"
#include "nsMaiHyperlink.h"
#include "ProxyAccessible.h"
#include "mozilla/Likely.h"


using namespace mozilla::a11y;

extern "C" {

static AtkHyperlink*
getLinkCB(AtkHypertext *aText, gint aLinkIndex)
{
  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
  AtkObject* atkHyperLink = nullptr;
  if (accWrap) {
    HyperTextAccessible* hyperText = accWrap->AsHyperText();
    NS_ENSURE_TRUE(hyperText, nullptr);

    Accessible* hyperLink = hyperText->LinkAt(aLinkIndex);
    if (!hyperLink || !hyperLink->IsLink()) {
      return nullptr;
    }

    atkHyperLink = AccessibleWrap::GetAtkObject(hyperLink);
  } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
    ProxyAccessible* proxyLink = proxy->LinkAt(aLinkIndex);
    if (!proxyLink)
      return nullptr;

    atkHyperLink = GetWrapperFor(proxyLink);
  }

    NS_ENSURE_TRUE(IS_MAI_OBJECT(atkHyperLink), nullptr);
    return MAI_ATK_OBJECT(atkHyperLink)->GetAtkHyperlink();
}

static gint
getLinkCountCB(AtkHypertext *aText)
{
  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
  if (accWrap) {
    HyperTextAccessible* hyperText = accWrap->AsHyperText();
    NS_ENSURE_TRUE(hyperText, -1);
    return hyperText->LinkCount();
  }

  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
    return proxy->LinkCount();
  }

  return -1;
}

static gint
getLinkIndexCB(AtkHypertext *aText, gint aCharIndex)
{
  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
  if (accWrap) {
    HyperTextAccessible* hyperText = accWrap->AsHyperText();
    NS_ENSURE_TRUE(hyperText, -1);

    return hyperText->LinkIndexAtOffset(aCharIndex);
  }

  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
    return proxy->LinkIndexAtOffset(aCharIndex);
  }

  return -1;
}
}

void
hypertextInterfaceInitCB(AtkHypertextIface* aIface)
{
  NS_ASSERTION(aIface, "no interface!");
  if (MOZ_UNLIKELY(!aIface))
    return;

  aIface->get_link = getLinkCB;
  aIface->get_n_links = getLinkCountCB;
  aIface->get_link_index = getLinkIndexCB;
}