accessible/atk/nsMaiInterfaceSelection.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 "LocalAccessible-inl.h"
  10 #include "AccessibleWrap.h"
  11 #include "nsMai.h"
  12 #include "RemoteAccessible.h"
  13 #include "mozilla/Likely.h"
  14
  15 #include <atk/atk.h>
  16
  17 using namespace mozilla::a11y;
  18
  19 extern "C" {
  20
  21 static gboolean addSelectionCB(AtkSelection* aSelection, gint i) {
  22   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
  23   if (accWrap && accWrap->IsSelect()) {
  24     return accWrap->AddItemToSelection(i);
  25   }
  26
  27   if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
  28     return proxy->AddItemToSelection(i);
  29   }
  30
  31   return FALSE;
  32 }
  33
  34 static gboolean clearSelectionCB(AtkSelection* aSelection) {
  35   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
  36   if (accWrap && accWrap->IsSelect()) {
  37     return accWrap->UnselectAll();
  38   }
  39
  40   if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
  41     return proxy->UnselectAll();
  42   }
  43
  44   return FALSE;
  45 }
  46
  47 static AtkObject* refSelectionCB(AtkSelection* aSelection, gint i) {
  48   AtkObject* atkObj = nullptr;
  49   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
  50   if (accWrap && accWrap->IsSelect()) {
  51     LocalAccessible* selectedItem = accWrap->GetSelectedItem(i);
  52     if (!selectedItem) {
  53       return nullptr;
  54     }
  55
  56     atkObj = AccessibleWrap::GetAtkObject(selectedItem);
  57   } else if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
  58     RemoteAccessible* selectedItem = proxy->GetSelectedItem(i);
  59     if (selectedItem) {
  60       atkObj = GetWrapperFor(selectedItem);
  61     }
  62   }
  63
  64   if (atkObj) {
  65     g_object_ref(atkObj);
  66   }
  67
  68   return atkObj;
  69 }
  70
  71 static gint getSelectionCountCB(AtkSelection* aSelection) {
  72   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
  73   if (accWrap && accWrap->IsSelect()) {
  74     return accWrap->SelectedItemCount();
  75   }
  76
  77   if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
  78     return proxy->SelectedItemCount();
  79   }
  80
  81   return -1;
  82 }
  83
  84 static gboolean isChildSelectedCB(AtkSelection* aSelection, gint i) {
  85   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
  86   if (accWrap && accWrap->IsSelect()) {
  87     return accWrap->IsItemSelected(i);
  88   }
  89
  90   if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
  91     return proxy->IsItemSelected(i);
  92   }
  93
  94   return FALSE;
  95 }
  96
  97 static gboolean removeSelectionCB(AtkSelection* aSelection, gint i) {
  98   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
  99   if (accWrap && accWrap->IsSelect()) {
 100     return accWrap->RemoveItemFromSelection(i);
 101   }
 102
 103   if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
 104     return proxy->RemoveItemFromSelection(i);
 105   }
 106
 107   return FALSE;
 108 }
 109
 110 static gboolean selectAllSelectionCB(AtkSelection* aSelection) {
 111   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
 112   if (accWrap && accWrap->IsSelect()) {
 113     return accWrap->SelectAll();
 114   }
 115
 116   if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aSelection))) {
 117     return proxy->SelectAll();
 118   }
 119
 120   return FALSE;
 121 }
 122 }
 123
 124 void selectionInterfaceInitCB(AtkSelectionIface* aIface) {
 125   NS_ASSERTION(aIface, "Invalid aIface");
 126   if (MOZ_UNLIKELY(!aIface)) return;
 127
 128   aIface->add_selection = addSelectionCB;
 129   aIface->clear_selection = clearSelectionCB;
 130   aIface->ref_selection = refSelectionCB;
 131   aIface->get_selection_count = getSelectionCountCB;
 132   aIface->is_child_selected = isChildSelectedCB;
 133   aIface->remove_selection = removeSelectionCB;
 134   aIface->select_all_selection = selectAllSelectionCB;
 135 }