accessible/xpcom/xpcAccessibleSelectable.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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsComponentManagerUtils.h"
   8 #include "nsIAccessible.h"
   9 #include "nsIMutableArray.h"
  10 #include "xpcAccessibleDocument.h"
  11 #include "xpcAccessibleSelectable.h"
  12
  13 using namespace mozilla::a11y;
  14
  15 NS_IMETHODIMP
  16 xpcAccessibleSelectable::GetSelectedItems(nsIArray** aSelectedItems) {
  17   NS_ENSURE_ARG_POINTER(aSelectedItems);
  18   *aSelectedItems = nullptr;
  19
  20   if (!Intl()) return NS_ERROR_FAILURE;
  21   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  22
  23   AutoTArray<Accessible*, 10> items;
  24   Intl()->SelectedItems(&items);
  25
  26   uint32_t itemCount = items.Length();
  27   if (itemCount == 0) return NS_OK;
  28
  29   nsresult rv = NS_OK;
  30   nsCOMPtr<nsIMutableArray> xpcItems =
  31       do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
  32   NS_ENSURE_SUCCESS(rv, rv);
  33
  34   for (uint32_t idx = 0; idx < itemCount; idx++) {
  35     xpcItems->AppendElement(static_cast<nsIAccessible*>(ToXPC(items[idx])));
  36   }
  37
  38   NS_ADDREF(*aSelectedItems = xpcItems);
  39   return NS_OK;
  40 }
  41
  42 NS_IMETHODIMP
  43 xpcAccessibleSelectable::GetSelectedItemCount(uint32_t* aSelectionCount) {
  44   NS_ENSURE_ARG_POINTER(aSelectionCount);
  45   *aSelectionCount = 0;
  46
  47   if (!Intl()) return NS_ERROR_FAILURE;
  48   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  49
  50   *aSelectionCount = Intl()->SelectedItemCount();
  51   return NS_OK;
  52 }
  53
  54 NS_IMETHODIMP
  55 xpcAccessibleSelectable::GetSelectedItemAt(uint32_t aIndex,
  56                                            nsIAccessible** aSelected) {
  57   NS_ENSURE_ARG_POINTER(aSelected);
  58   *aSelected = nullptr;
  59
  60   if (!Intl()) return NS_ERROR_FAILURE;
  61   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  62
  63   *aSelected = ToXPC(Intl()->GetSelectedItem(aIndex));
  64   if (*aSelected) {
  65     NS_ADDREF(*aSelected);
  66     return NS_OK;
  67   }
  68
  69   return NS_ERROR_INVALID_ARG;
  70 }
  71
  72 NS_IMETHODIMP
  73 xpcAccessibleSelectable::IsItemSelected(uint32_t aIndex, bool* aIsSelected) {
  74   NS_ENSURE_ARG_POINTER(aIsSelected);
  75   *aIsSelected = false;
  76
  77   if (!Intl()) return NS_ERROR_FAILURE;
  78   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  79
  80   *aIsSelected = Intl()->IsItemSelected(aIndex);
  81   return NS_OK;
  82 }
  83
  84 NS_IMETHODIMP
  85 xpcAccessibleSelectable::AddItemToSelection(uint32_t aIndex) {
  86   if (!Intl()) return NS_ERROR_FAILURE;
  87   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  88
  89   return Intl()->AddItemToSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
  90 }
  91
  92 NS_IMETHODIMP
  93 xpcAccessibleSelectable::RemoveItemFromSelection(uint32_t aIndex) {
  94   if (!Intl()) return NS_ERROR_FAILURE;
  95   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  96
  97   return Intl()->RemoveItemFromSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
  98 }
  99
 100 NS_IMETHODIMP
 101 xpcAccessibleSelectable::SelectAll(bool* aIsMultiSelect) {
 102   NS_ENSURE_ARG_POINTER(aIsMultiSelect);
 103   *aIsMultiSelect = false;
 104
 105   if (!Intl()) return NS_ERROR_FAILURE;
 106   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
 107
 108   *aIsMultiSelect = Intl()->SelectAll();
 109   return NS_OK;
 110 }
 111
 112 NS_IMETHODIMP
 113 xpcAccessibleSelectable::UnselectAll() {
 114   if (!Intl()) return NS_ERROR_FAILURE;
 115   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
 116
 117   Intl()->UnselectAll();
 118   return NS_OK;
 119 }