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 "Accessible.h"
   8
   9 #include "nsComponentManagerUtils.h"
  10 #include "nsIAccessible.h"
  11 #include "nsIMutableArray.h"
  12 #include "xpcAccessibleDocument.h"
  13 #include "xpcAccessibleSelectable.h"
  14
  15 using namespace mozilla::a11y;
  16
  17 NS_IMETHODIMP
  18 xpcAccessibleSelectable::GetSelectedItems(nsIArray** aSelectedItems) {
  19   NS_ENSURE_ARG_POINTER(aSelectedItems);
  20   *aSelectedItems = nullptr;
  21
  22   if (!Intl()) return NS_ERROR_FAILURE;
  23   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  24
  25   AutoTArray<Accessible*, 10> items;
  26   Intl()->SelectedItems(&items);
  27
  28   uint32_t itemCount = items.Length();
  29   if (itemCount == 0) return NS_OK;
  30
  31   nsresult rv = NS_OK;
  32   nsCOMPtr<nsIMutableArray> xpcItems =
  33       do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
  34   NS_ENSURE_SUCCESS(rv, rv);
  35
  36   for (uint32_t idx = 0; idx < itemCount; idx++) {
  37     xpcItems->AppendElement(static_cast<nsIAccessible*>(ToXPC(items[idx])));
  38   }
  39
  40   NS_ADDREF(*aSelectedItems = xpcItems);
  41   return NS_OK;
  42 }
  43
  44 NS_IMETHODIMP
  45 xpcAccessibleSelectable::GetSelectedItemCount(uint32_t* aSelectionCount) {
  46   NS_ENSURE_ARG_POINTER(aSelectionCount);
  47   *aSelectionCount = 0;
  48
  49   if (!Intl()) return NS_ERROR_FAILURE;
  50   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  51
  52   *aSelectionCount = Intl()->SelectedItemCount();
  53   return NS_OK;
  54 }
  55
  56 NS_IMETHODIMP
  57 xpcAccessibleSelectable::GetSelectedItemAt(uint32_t aIndex,
  58                                            nsIAccessible** aSelected) {
  59   NS_ENSURE_ARG_POINTER(aSelected);
  60   *aSelected = nullptr;
  61
  62   if (!Intl()) return NS_ERROR_FAILURE;
  63   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  64
  65   *aSelected = ToXPC(Intl()->GetSelectedItem(aIndex));
  66   if (*aSelected) {
  67     NS_ADDREF(*aSelected);
  68     return NS_OK;
  69   }
  70
  71   return NS_ERROR_INVALID_ARG;
  72 }
  73
  74 NS_IMETHODIMP
  75 xpcAccessibleSelectable::IsItemSelected(uint32_t aIndex, bool* aIsSelected) {
  76   NS_ENSURE_ARG_POINTER(aIsSelected);
  77   *aIsSelected = false;
  78
  79   if (!Intl()) return NS_ERROR_FAILURE;
  80   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  81
  82   *aIsSelected = Intl()->IsItemSelected(aIndex);
  83   return NS_OK;
  84 }
  85
  86 NS_IMETHODIMP
  87 xpcAccessibleSelectable::AddItemToSelection(uint32_t aIndex) {
  88   if (!Intl()) return NS_ERROR_FAILURE;
  89   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  90
  91   return Intl()->AddItemToSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
  92 }
  93
  94 NS_IMETHODIMP
  95 xpcAccessibleSelectable::RemoveItemFromSelection(uint32_t aIndex) {
  96   if (!Intl()) return NS_ERROR_FAILURE;
  97   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
  98
  99   return Intl()->RemoveItemFromSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
 100 }
 101
 102 NS_IMETHODIMP
 103 xpcAccessibleSelectable::SelectAll(bool* aIsMultiSelect) {
 104   NS_ENSURE_ARG_POINTER(aIsMultiSelect);
 105   *aIsMultiSelect = false;
 106
 107   if (!Intl()) return NS_ERROR_FAILURE;
 108   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
 109
 110   *aIsMultiSelect = Intl()->SelectAll();
 111   return NS_OK;
 112 }
 113
 114 NS_IMETHODIMP
 115 xpcAccessibleSelectable::UnselectAll() {
 116   if (!Intl()) return NS_ERROR_FAILURE;
 117   MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
 118
 119   Intl()->UnselectAll();
 120   return NS_OK;
 121 }