DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (409f3966645a)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262
/* -*- 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 "nsIURI.h"
#include "nsMaiHyperlink.h"
#include "mozilla/a11y/ProxyAccessible.h"

using namespace mozilla::a11y;

/* MaiAtkHyperlink */

#define MAI_TYPE_ATK_HYPERLINK      (mai_atk_hyperlink_get_type ())
#define MAI_ATK_HYPERLINK(obj)      (G_TYPE_CHECK_INSTANCE_CAST ((obj),\
                                     MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlink))
#define MAI_ATK_HYPERLINK_CLASS(klass)  (G_TYPE_CHECK_CLASS_CAST ((klass),\
                                 MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlinkClass))
#define MAI_IS_ATK_HYPERLINK(obj)      (G_TYPE_CHECK_INSTANCE_TYPE ((obj),\
                                        MAI_TYPE_ATK_HYPERLINK))
#define MAI_IS_ATK_HYPERLINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),\
                                        MAI_TYPE_ATK_HYPERLINK))
#define MAI_ATK_HYPERLINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
                                 MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlinkClass))

/**
 * This MaiAtkHyperlink is a thin wrapper, in the MAI namespace,
 * for AtkHyperlink
 */

struct MaiAtkHyperlink
{
    AtkHyperlink parent;

    /*
     * The MaiHyperlink whose properties and features are exported via this
     * hyperlink instance.
     */
    MaiHyperlink *maiHyperlink;
};

struct MaiAtkHyperlinkClass
{
    AtkHyperlinkClass parent_class;
};

GType mai_atk_hyperlink_get_type(void);

G_BEGIN_DECLS
/* callbacks for AtkHyperlink */
static void classInitCB(AtkHyperlinkClass *aClass);
static void finalizeCB(GObject *aObj);

/* callbacks for AtkHyperlink virtual functions */
static gchar *getUriCB(AtkHyperlink *aLink, gint aLinkIndex);
static AtkObject *getObjectCB(AtkHyperlink *aLink, gint aLinkIndex);
static gint getEndIndexCB(AtkHyperlink *aLink);
static gint getStartIndexCB(AtkHyperlink *aLink);
static gboolean isValidCB(AtkHyperlink *aLink);
static gint getAnchorCountCB(AtkHyperlink *aLink);
G_END_DECLS

static gpointer parent_class = nullptr;

static MaiHyperlink*
GetMaiHyperlink(AtkHyperlink *aHyperlink)
{
    NS_ENSURE_TRUE(MAI_IS_ATK_HYPERLINK(aHyperlink), nullptr);
    MaiHyperlink * maiHyperlink =
        MAI_ATK_HYPERLINK(aHyperlink)->maiHyperlink;
    NS_ENSURE_TRUE(maiHyperlink != nullptr, nullptr);
    NS_ENSURE_TRUE(maiHyperlink->GetAtkHyperlink() == aHyperlink, nullptr);
    return maiHyperlink;
}

GType
mai_atk_hyperlink_get_type(void)
{
    static GType type = 0;

    if (!type) {
        static const GTypeInfo tinfo = {
            sizeof(MaiAtkHyperlinkClass),
            (GBaseInitFunc)nullptr,
            (GBaseFinalizeFunc)nullptr,
            (GClassInitFunc)classInitCB,
            (GClassFinalizeFunc)nullptr,
            nullptr, /* class data */
            sizeof(MaiAtkHyperlink), /* instance size */
            0, /* nb preallocs */
            (GInstanceInitFunc)nullptr,
            nullptr /* value table */
        };

        type = g_type_register_static(ATK_TYPE_HYPERLINK,
                                      "MaiAtkHyperlink",
                                      &tinfo, GTypeFlags(0));
    }
    return type;
}

MaiHyperlink::MaiHyperlink(AccessibleOrProxy aHyperLink) :
    mHyperlink(aHyperLink),
    mMaiAtkHyperlink(nullptr)
{
    mMaiAtkHyperlink =
        reinterpret_cast<AtkHyperlink *>
                        (g_object_new(mai_atk_hyperlink_get_type(), nullptr));
    NS_ASSERTION(mMaiAtkHyperlink, "OUT OF MEMORY");
    if (!mMaiAtkHyperlink)
      return;

    MAI_ATK_HYPERLINK(mMaiAtkHyperlink)->maiHyperlink = this;
}

MaiHyperlink::~MaiHyperlink()
{
  if (mMaiAtkHyperlink) {
    MAI_ATK_HYPERLINK(mMaiAtkHyperlink)->maiHyperlink = nullptr;
    g_object_unref(mMaiAtkHyperlink);
  }
}


/* static functions for ATK callbacks */

void
classInitCB(AtkHyperlinkClass *aClass)
{
    GObjectClass *gobject_class = G_OBJECT_CLASS(aClass);

    parent_class = g_type_class_peek_parent(aClass);

    aClass->get_uri = getUriCB;
    aClass->get_object = getObjectCB;
    aClass->get_end_index = getEndIndexCB;
    aClass->get_start_index = getStartIndexCB;
    aClass->is_valid = isValidCB;
    aClass->get_n_anchors = getAnchorCountCB;

    gobject_class->finalize = finalizeCB;
}

void
finalizeCB(GObject *aObj)
{
    NS_ASSERTION(MAI_IS_ATK_HYPERLINK(aObj), "Invalid MaiAtkHyperlink");
    if (!MAI_IS_ATK_HYPERLINK(aObj))
        return;

    MaiAtkHyperlink *maiAtkHyperlink = MAI_ATK_HYPERLINK(aObj);
    maiAtkHyperlink->maiHyperlink = nullptr;

    /* call parent finalize function */
    if (G_OBJECT_CLASS (parent_class)->finalize)
        G_OBJECT_CLASS (parent_class)->finalize(aObj);
}

gchar *
getUriCB(AtkHyperlink *aLink, gint aLinkIndex)
{
  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
  if (!maiLink)
    return nullptr;

  nsAutoCString cautoStr;
  if (Accessible* hyperlink = maiLink->GetAccHyperlink()) {
    nsCOMPtr<nsIURI> uri = hyperlink->AnchorURIAt(aLinkIndex);
    if (!uri)
      return nullptr;

    nsresult rv = uri->GetSpec(cautoStr);
    NS_ENSURE_SUCCESS(rv, nullptr);

    return g_strdup(cautoStr.get());
  }

  bool valid;
  maiLink->Proxy()->AnchorURIAt(aLinkIndex, cautoStr, &valid);
  if (!valid)
    return nullptr;

  return g_strdup(cautoStr.get());
}

AtkObject *
getObjectCB(AtkHyperlink *aLink, gint aLinkIndex)
{
  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
  if (!maiLink) {
    return nullptr;
  }

  if (Accessible* hyperlink = maiLink->GetAccHyperlink()) {
    Accessible* anchor = hyperlink->AnchorAt(aLinkIndex);
    NS_ENSURE_TRUE(anchor, nullptr);

    return AccessibleWrap::GetAtkObject(anchor);
  }

  ProxyAccessible* anchor = maiLink->Proxy()->AnchorAt(aLinkIndex);
  return anchor ? GetWrapperFor(anchor) : nullptr;
}

gint
getEndIndexCB(AtkHyperlink *aLink)
{
  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
  if (!maiLink)
    return false;

  if (Accessible* hyperlink = maiLink->GetAccHyperlink())
    return static_cast<gint>(hyperlink->EndOffset());

  bool valid = false;
  uint32_t endIdx = maiLink->Proxy()->EndOffset(&valid);
  return valid ? static_cast<gint>(endIdx) : -1;
}

gint
getStartIndexCB(AtkHyperlink *aLink)
{
  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
  if (!maiLink)
    return -1;

  if (Accessible* hyperlink = maiLink->GetAccHyperlink())
    return static_cast<gint>(hyperlink->StartOffset());

  bool valid = false;
  uint32_t startIdx = maiLink->Proxy()->StartOffset(&valid);
  return valid ? static_cast<gint>(startIdx) : -1;
}

gboolean
isValidCB(AtkHyperlink *aLink)
{
  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
  if (!maiLink)
    return false;

  if (Accessible* hyperlink = maiLink->GetAccHyperlink())
    return static_cast<gboolean>(hyperlink->IsLinkValid());

  return static_cast<gboolean>(maiLink->Proxy()->IsLinkValid());
}

gint
getAnchorCountCB(AtkHyperlink *aLink)
{
  MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
  if (!maiLink)
    return -1;

  if (Accessible* hyperlink = maiLink->GetAccHyperlink())
    return static_cast<gint>(hyperlink->AnchorCount());

  bool valid = false;
  uint32_t anchorCount = maiLink->Proxy()->AnchorCount(&valid);
  return valid ? static_cast<gint>(anchorCount) : -1;
}