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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ACCESSIBILITY_AX_VIEW_STATE_H_
#define UI_ACCESSIBILITY_AX_VIEW_STATE_H_
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/strings/string16.h"
#include "ui/accessibility/ax_enums.h"
#include "ui/accessibility/ax_export.h"
namespace ui {
////////////////////////////////////////////////////////////////////////////////
//
// AXViewState
//
// A cross-platform struct for storing the core accessibility information
// that should be provided about any UI view to assistive technology (AT).
//
////////////////////////////////////////////////////////////////////////////////
struct AX_EXPORT AXViewState {
public:
AXViewState();
~AXViewState();
// Set or check bits in |state_|.
void AddStateFlag(ui::AXState state);
bool HasStateFlag(ui::AXState state) const;
// The view's state, a bitmask containing fields such as checked
// (for a checkbox) and protected (for a password text box). This "state"
// should not be confused with the class's name.
uint32 state() { return state_; }
// The view's role, like button or list box.
AXRole role;
// The view's name / label.
base::string16 name;
// The view's value, for example the text content.
base::string16 value;
// The name of the default action if the user clicks on this view.
base::string16 default_action;
// The keyboard shortcut to activate this view, if any.
base::string16 keyboard_shortcut;
// The selection start and end. Only applies to views with text content,
// such as a text box or combo box; start and end should be -1 otherwise.
int selection_start;
int selection_end;
// The selected item's index and the count of the number of items.
// Only applies to views with multiple choices like a listbox; both
// index and count should be -1 otherwise.
int index;
int count;
// An optional callback that can be used by accessibility clients to
// set the string value of this view. This only applies to roles where
// setting the value makes sense, like a text box. Not often used by
// screen readers, but often used by automation software to script
// things like logging into portals or filling forms.
//
// This callback is only valid for the lifetime of the view, and should
// be a safe no-op if the view is deleted. Typically, accessible views
// should use a WeakPtr when binding the callback.
base::Callback<void(const base::string16&)> set_value_callback;
private:
uint32 state_;
};
} // namespace ui
#endif // UI_ACCESSIBILITY_AX_VIEW_STATE_H_
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