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 "Accessible-inl.h"
  10 #include "HyperTextAccessible.h"
  11 #include "nsMai.h"
  12 #include "nsMaiHyperlink.h"
  13 #include "mozilla/Likely.h"
  14
  15 using namespace mozilla::a11y;
  16
  17 extern "C" {
  18
  19 static AtkHyperlink*
  20 getLinkCB(AtkHypertext *aText, gint aLinkIndex)
  21 {
  22   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
  23   if (!accWrap)
  24     return nullptr;
  25
  26   HyperTextAccessible* hyperText = accWrap->AsHyperText();
  27   NS_ENSURE_TRUE(hyperText, nullptr);
  28
  29   Accessible* hyperLink = hyperText->LinkAt(aLinkIndex);
  30   if (!hyperLink)
  31     return nullptr;
  32
  33   AtkObject* hyperLinkAtkObj = AccessibleWrap::GetAtkObject(hyperLink);
  34   AccessibleWrap* accChild = GetAccessibleWrap(hyperLinkAtkObj);
  35   NS_ENSURE_TRUE(accChild, nullptr);
  36
  37   MaiHyperlink *maiHyperlink = accChild->GetMaiHyperlink();
  38   NS_ENSURE_TRUE(maiHyperlink, nullptr);
  39   return maiHyperlink->GetAtkHyperlink();
  40 }
  41
  42 static gint
  43 getLinkCountCB(AtkHypertext *aText)
  44 {
  45   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
  46   if (!accWrap)
  47     return -1;
  48
  49   HyperTextAccessible* hyperText = accWrap->AsHyperText();
  50   NS_ENSURE_TRUE(hyperText, -1);
  51
  52   return hyperText->LinkCount();
  53 }
  54
  55 static gint
  56 getLinkIndexCB(AtkHypertext *aText, gint aCharIndex)
  57 {
  58   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
  59   if (!accWrap)
  60     return -1;
  61
  62   HyperTextAccessible* hyperText = accWrap->AsHyperText();
  63   NS_ENSURE_TRUE(hyperText, -1);
  64
  65   return hyperText->LinkIndexAtOffset(aCharIndex);
  66 }
  67 }
  68
  69 void
  70 hypertextInterfaceInitCB(AtkHypertextIface* aIface)
  71 {
  72   NS_ASSERTION(aIface, "no interface!");
  73   if (MOZ_UNLIKELY(!aIface))
  74     return;
  75
  76   aIface->get_link = getLinkCB;
  77   aIface->get_n_links = getLinkCountCB;
  78   aIface->get_link_index = getLinkIndexCB;
  79 }