/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
 */
/* 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 "ia2AccessibleHypertext.h"

#include "AccessibleHypertext_i.c"

#include "HyperTextAccessibleWrap.h"
#include "IUnknownImpl.h"

using namespace mozilla::a11y;

// IAccessibleHypertext

STDMETHODIMP
ia2AccessibleHypertext::get_nHyperlinks(long* aHyperlinkCount) {
  if (!aHyperlinkCount) return E_INVALIDARG;

  *aHyperlinkCount = 0;

  MOZ_ASSERT(!HyperTextProxyFor(this));

  HyperTextAccessibleWrap* hyperText =
      static_cast<HyperTextAccessibleWrap*>(this);
  if (hyperText->IsDefunct()) return CO_E_OBJNOTCONNECTED;

  *aHyperlinkCount = hyperText->LinkCount();
  return S_OK;
}

STDMETHODIMP
ia2AccessibleHypertext::get_hyperlink(long aLinkIndex,
                                      IAccessibleHyperlink** aHyperlink) {
  if (!aHyperlink) return E_INVALIDARG;

  *aHyperlink = nullptr;

  AccessibleWrap* hyperLink;
  MOZ_ASSERT(!HyperTextProxyFor(this));
  HyperTextAccessibleWrap* hyperText =
      static_cast<HyperTextAccessibleWrap*>(this);
  if (hyperText->IsDefunct()) {
    return CO_E_OBJNOTCONNECTED;
  }

  hyperLink = static_cast<AccessibleWrap*>(hyperText->LinkAt(aLinkIndex));

  if (!hyperLink) return E_FAIL;

  *aHyperlink = static_cast<IAccessibleHyperlink*>(hyperLink);
  (*aHyperlink)->AddRef();
  return S_OK;
}

STDMETHODIMP
ia2AccessibleHypertext::get_hyperlinkIndex(long aCharIndex,
                                           long* aHyperlinkIndex) {
  if (!aHyperlinkIndex) return E_INVALIDARG;

  *aHyperlinkIndex = 0;

  MOZ_ASSERT(!HyperTextProxyFor(this));

  HyperTextAccessibleWrap* hyperAcc =
      static_cast<HyperTextAccessibleWrap*>(this);
  if (hyperAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;

  *aHyperlinkIndex = hyperAcc->LinkIndexAtOffset(aCharIndex);
  return S_OK;
}

STDMETHODIMP
ia2AccessibleHypertext::get_hyperlinks(IAccessibleHyperlink*** aHyperlinks,
                                       long* aNHyperlinks) {
  if (!aHyperlinks || !aNHyperlinks) {
    return E_INVALIDARG;
  }

  *aHyperlinks = nullptr;
  *aNHyperlinks = 0;

  MOZ_ASSERT(!HyperTextProxyFor(this));

  HyperTextAccessibleWrap* hyperText =
      static_cast<HyperTextAccessibleWrap*>(this);
  if (hyperText->IsDefunct()) {
    return CO_E_OBJNOTCONNECTED;
  }

  uint32_t count = hyperText->LinkCount();
  *aNHyperlinks = count;

  if (count == 0) {
    *aHyperlinks = nullptr;
    return S_FALSE;
  }

  *aHyperlinks = static_cast<IAccessibleHyperlink**>(
      ::CoTaskMemAlloc(sizeof(IAccessibleHyperlink*) * count));
  if (!*aHyperlinks) {
    return E_OUTOFMEMORY;
  }

  for (uint32_t i = 0; i < count; ++i) {
    AccessibleWrap* hyperLink =
        static_cast<AccessibleWrap*>(hyperText->LinkAt(i));
    MOZ_ASSERT(hyperLink);
    (*aHyperlinks)[i] = static_cast<IAccessibleHyperlink*>(hyperLink);
    (*aHyperlinks)[i]->AddRef();
  }

  return S_OK;
}