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// Copyright (c) 2010 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 WEBKIT_GLUE_WEBACCESSIBILITY_H_
#define WEBKIT_GLUE_WEBACCESSIBILITY_H_
#include <map>
#include <vector>
#include "base/string16.h"
#include "ui/gfx/rect.h"
namespace WebKit {
class WebAccessibilityCache;
class WebAccessibilityObject;
}
namespace webkit_glue {
// A compact representation of the accessibility information for a
// single web object, in a form that can be serialized and sent from
// the renderer process to the browser process.
struct WebAccessibility {
public:
// An alphabetical enumeration of accessibility roles.
enum Role {
ROLE_NONE = 0,
ROLE_UNKNOWN,
ROLE_ALERT,
ROLE_ALERT_DIALOG,
ROLE_ANNOTATION,
ROLE_APPLICATION,
ROLE_ARTICLE,
ROLE_BROWSER,
ROLE_BUSY_INDICATOR,
ROLE_BUTTON,
ROLE_CELL,
ROLE_CHECKBOX,
ROLE_COLOR_WELL,
ROLE_COLUMN,
ROLE_COLUMN_HEADER,
ROLE_COMBO_BOX,
ROLE_DEFINITION_LIST_DEFINITION,
ROLE_DEFINITION_LIST_TERM,
ROLE_DIALOG,
ROLE_DIRECTORY,
ROLE_DISCLOSURE_TRIANGLE,
ROLE_DOCUMENT,
ROLE_DRAWER,
ROLE_EDITABLE_TEXT,
ROLE_GRID,
ROLE_GROUP,
ROLE_GROW_AREA,
ROLE_HEADING,
ROLE_HELP_TAG,
ROLE_IGNORED,
ROLE_IMAGE,
ROLE_IMAGE_MAP,
ROLE_IMAGE_MAP_LINK,
ROLE_INCREMENTOR,
ROLE_LANDMARK_APPLICATION,
ROLE_LANDMARK_BANNER,
ROLE_LANDMARK_COMPLEMENTARY,
ROLE_LANDMARK_CONTENTINFO,
ROLE_LANDMARK_MAIN,
ROLE_LANDMARK_NAVIGATION,
ROLE_LANDMARK_SEARCH,
ROLE_LINK,
ROLE_LIST,
ROLE_LISTBOX,
ROLE_LISTBOX_OPTION,
ROLE_LIST_ITEM,
ROLE_LIST_MARKER,
ROLE_LOG,
ROLE_MARQUEE,
ROLE_MATH,
ROLE_MATTE,
ROLE_MENU,
ROLE_MENU_BAR,
ROLE_MENU_ITEM,
ROLE_MENU_BUTTON,
ROLE_MENU_LIST_OPTION,
ROLE_MENU_LIST_POPUP,
ROLE_NOTE,
ROLE_OUTLINE,
ROLE_POPUP_BUTTON,
ROLE_PROGRESS_INDICATOR,
ROLE_RADIO_BUTTON,
ROLE_RADIO_GROUP,
ROLE_REGION,
ROLE_ROW,
ROLE_ROW_HEADER,
ROLE_RULER,
ROLE_RULER_MARKER,
ROLE_SCROLLAREA,
ROLE_SCROLLBAR,
ROLE_SHEET,
ROLE_SLIDER,
ROLE_SLIDER_THUMB,
ROLE_SPLITTER,
ROLE_SPLIT_GROUP,
ROLE_STATIC_TEXT,
ROLE_STATUS,
ROLE_SYSTEM_WIDE,
ROLE_TAB,
ROLE_TABLE,
ROLE_TABLE_HEADER_CONTAINER,
ROLE_TAB_GROUP,
ROLE_TAB_LIST,
ROLE_TAB_PANEL,
ROLE_TEXTAREA,
ROLE_TEXT_FIELD,
ROLE_TIMER,
ROLE_TOOLBAR,
ROLE_TOOLTIP,
ROLE_TREE,
ROLE_TREE_GRID,
ROLE_TREE_ITEM,
ROLE_VALUE_INDICATOR,
ROLE_WEBCORE_LINK,
ROLE_WEB_AREA,
ROLE_WINDOW,
NUM_ROLES
};
// An alphabetical enumeration of accessibility states.
// A state bitmask is formed by shifting 1 to the left by each state,
// for example:
// int mask = (1 << STATE_CHECKED) | (1 << STATE_FOCUSED);
enum State {
STATE_CHECKED,
STATE_COLLAPSED,
STATE_EXPANDED,
STATE_FOCUSABLE,
STATE_FOCUSED,
STATE_HASPOPUP,
STATE_HOTTRACKED,
STATE_INDETERMINATE,
STATE_INVISIBLE,
STATE_LINKED,
STATE_MULTISELECTABLE,
STATE_OFFSCREEN,
STATE_PRESSED,
STATE_PROTECTED,
STATE_READONLY,
STATE_SELECTABLE,
STATE_SELECTED,
STATE_TRAVERSED,
STATE_BUSY,
STATE_UNAVAILABLE
};
// Additional optional attributes that can be optionally attached to
// a node.
enum Attribute {
// Doc attributes: only make sense when applied to the top-level
// Document node.
ATTR_DOC_URL,
ATTR_DOC_TITLE,
ATTR_DOC_MIMETYPE,
ATTR_DOC_DOCTYPE,
ATTR_DOC_SCROLLX,
ATTR_DOC_SCROLLY,
// Editable text attributes
ATTR_TEXT_SEL_START,
ATTR_TEXT_SEL_END,
// Attributes that could apply to any node.
ATTR_ACTION,
ATTR_DESCRIPTION,
ATTR_DISPLAY,
ATTR_HELP,
ATTR_HTML_TAG,
ATTR_SHORTCUT,
ATTR_URL,
NUM_ATTRIBUTES
};
// Empty constructor, for serialization.
WebAccessibility();
// Construct from a WebAccessibilityObject. Recursively creates child
// nodes as needed to complete the tree. Adds |src| to |cache| and
// stores its cache ID.
WebAccessibility(const WebKit::WebAccessibilityObject& src,
WebKit::WebAccessibilityCache* cache,
bool include_children);
~WebAccessibility();
private:
// Initialize an already-created struct, same as the constructor above.
void Init(const WebKit::WebAccessibilityObject& src,
WebKit::WebAccessibilityCache* cache,
bool include_children);
// Returns true if |ancestor| is the first unignored parent of |child|,
// which means that when walking up the parent chain from |child|,
// |ancestor| is the *first* ancestor that isn't marked as
// accessibilityIsIgnored().
bool IsParentUnignoredOf(const WebKit::WebAccessibilityObject& ancestor,
const WebKit::WebAccessibilityObject& child);
public:
// This is a simple serializable struct. All member variables should be
// copyable.
int32 id;
string16 name;
string16 value;
Role role;
uint32 state;
gfx::Rect location;
std::map<int32, string16> attributes;
std::vector<WebAccessibility> children;
std::vector<int32> indirect_child_ids;
std::vector<std::pair<string16, string16> > html_attributes;
};
} // namespace webkit_glue
#endif // WEBKIT_GLUE_WEBACCESSIBILITY_H_
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