accessible/atk/nsMaiInterfaceHypertext.cpp
author Olli Pettay <Olli.Pettay@helsinki.fi>
Wed, 25 Mar 2015 16:05:18 +0200
changeset 235825 2862e6b752de401637425e1ab32c44e9000a7630
parent 190354 85b4fe3a7fa90caa702aa36f6985c667d9e01b02
child 240261 2cea659eaa02c8e39c9187c7835875860f3450a5
permissions -rw-r--r--
Bug 1146615 - IPC Proxy for HyperText, r=tbsaunde

/* -*- 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));
  if (accWrap) {
    HyperTextAccessible* hyperText = accWrap->AsHyperText();
    NS_ENSURE_TRUE(hyperText, nullptr);

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

    AtkObject* hyperLinkAtkObj = AccessibleWrap::GetAtkObject(hyperLink);
    AccessibleWrap* accChild = GetAccessibleWrap(hyperLinkAtkObj);
    NS_ENSURE_TRUE(accChild, nullptr);

    MaiHyperlink* maiHyperlink = accChild->GetMaiHyperlink();
    NS_ENSURE_TRUE(maiHyperlink, nullptr);
    return maiHyperlink->GetAtkHyperlink();
  }

  if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
    ProxyAccessible* proxyLink = proxy->LinkAt(aLinkIndex);
    if (proxyLink) {
      NS_WARNING("IMPLEMENT ME! See bug 1146518.");
      // We should somehow get from ProxyAccessible* to AtkHyperlink*.
    }
    return nullptr;
  }

  return nullptr;
}

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;
}