summaryrefslogtreecommitdiffstats
path: root/accessible/xul/XULComboboxAccessible.cpp
blob: 035433195f981a066837815c251ebf8481944b76 (plain)
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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "XULComboboxAccessible.h"

#include "Accessible-inl.h"
#include "nsAccessibilityService.h"
#include "DocAccessible.h"
#include "nsCoreUtils.h"
#include "Role.h"
#include "States.h"

#include "mozilla/dom/Element.h"
#include "nsIDOMXULMenuListElement.h"

using namespace mozilla::a11y;

////////////////////////////////////////////////////////////////////////////////
// XULComboboxAccessible
////////////////////////////////////////////////////////////////////////////////

XULComboboxAccessible::XULComboboxAccessible(nsIContent* aContent,
                                             DocAccessible* aDoc)
    : AccessibleWrap(aContent, aDoc) {
  mGenericTypes |= eCombobox;
}

role XULComboboxAccessible::NativeRole() const { return roles::COMBOBOX; }

uint64_t XULComboboxAccessible::NativeState() const {
  // As a nsComboboxAccessible we can have the following states:
  //     STATE_FOCUSED
  //     STATE_FOCUSABLE
  //     STATE_HASPOPUP
  //     STATE_EXPANDED
  //     STATE_COLLAPSED

  // Get focus status from base class
  uint64_t state = Accessible::NativeState();

  nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
  if (menuList) {
    bool isOpen = false;
    menuList->GetOpen(&isOpen);
    if (isOpen)
      state |= states::EXPANDED;
    else
      state |= states::COLLAPSED;
  }

  return state | states::HASPOPUP;
}

void XULComboboxAccessible::Description(nsString& aDescription) {
  aDescription.Truncate();
  // Use description of currently focused option
  nsCOMPtr<nsIDOMXULMenuListElement> menuListElm = Elm()->AsXULMenuList();
  if (!menuListElm) return;

  nsCOMPtr<dom::Element> focusedOptionItem;
  menuListElm->GetSelectedItem(getter_AddRefs(focusedOptionItem));
  if (focusedOptionItem && mDoc) {
    Accessible* focusedOptionAcc = mDoc->GetAccessible(focusedOptionItem);
    if (focusedOptionAcc) focusedOptionAcc->Description(aDescription);
  }
}

void XULComboboxAccessible::Value(nsString& aValue) const {
  aValue.Truncate();

  // The value is the option or text shown entered in the combobox.
  nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
  if (menuList) menuList->GetLabel(aValue);
}

uint8_t XULComboboxAccessible::ActionCount() const {
  // Just one action (click).
  return 1;
}

bool XULComboboxAccessible::DoAction(uint8_t aIndex) const {
  if (aIndex != XULComboboxAccessible::eAction_Click) return false;

  // Programmaticaly toggle the combo box.
  nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
  if (!menuList) return false;

  bool isDroppedDown = false;
  menuList->GetOpen(&isDroppedDown);
  menuList->SetOpen(!isDroppedDown);
  return true;
}

void XULComboboxAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
  aName.Truncate();
  if (aIndex != XULComboboxAccessible::eAction_Click) return;

  nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
  if (!menuList) return;

  bool isDroppedDown = false;
  menuList->GetOpen(&isDroppedDown);
  if (isDroppedDown)
    aName.AssignLiteral("close");
  else
    aName.AssignLiteral("open");
}

////////////////////////////////////////////////////////////////////////////////
// Widgets

bool XULComboboxAccessible::IsActiveWidget() const {
  if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::editable,
                                         nsGkAtoms::_true, eIgnoreCase)) {
    int32_t childCount = mChildren.Length();
    for (int32_t idx = 0; idx < childCount; idx++) {
      Accessible* child = mChildren[idx];
      if (child->Role() == roles::ENTRY)
        return FocusMgr()->HasDOMFocus(child->GetContent());
    }
    return false;
  }

  return FocusMgr()->HasDOMFocus(mContent);
}

bool XULComboboxAccessible::AreItemsOperable() const {
  nsCOMPtr<nsIDOMXULMenuListElement> menuListElm = Elm()->AsXULMenuList();
  if (menuListElm) {
    bool isOpen = false;
    menuListElm->GetOpen(&isOpen);
    return isOpen;
  }

  return false;
}