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Diffstat (limited to 'chromium/chrome/browser/resources/chromeos/chromevox/common/aria_util.js')
| -rw-r--r-- | chromium/chrome/browser/resources/chromeos/chromevox/common/aria_util.js | 978 |
1 files changed, 0 insertions, 978 deletions
diff --git a/chromium/chrome/browser/resources/chromeos/chromevox/common/aria_util.js b/chromium/chrome/browser/resources/chromeos/chromevox/common/aria_util.js deleted file mode 100644 index 09b36bdf1a1..00000000000 --- a/chromium/chrome/browser/resources/chromeos/chromevox/common/aria_util.js +++ /dev/null @@ -1,978 +0,0 @@ -// Copyright 2014 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. - -/** - * @fileoverview A collection of JavaScript utilities used to simplify working - * with ARIA (http://www.w3.org/TR/wai-aria). - */ - - -goog.provide('cvox.AriaUtil'); -goog.require('cvox.AbstractEarcons'); -goog.require('cvox.ChromeVox'); -goog.require('cvox.NodeState'); -goog.require('cvox.NodeStateUtil'); - - -/** - * Create the namespace - * @constructor - */ -cvox.AriaUtil = function() { -}; - - -/** - * A mapping from ARIA role names to their message ids. - * Note: If you are adding a new mapping, the new message identifier needs a - * corresponding braille message. For example, a message id 'tag_button' - * requires another message 'tag_button_brl' within messages.js. - * @type {Object<string>} - */ -cvox.AriaUtil.WIDGET_ROLE_TO_NAME = { - 'alert' : 'role_alert', - 'alertdialog' : 'role_alertdialog', - 'button' : 'role_button', - 'checkbox' : 'role_checkbox', - 'columnheader' : 'role_columnheader', - 'combobox' : 'role_combobox', - 'dialog' : 'role_dialog', - 'grid' : 'role_grid', - 'gridcell' : 'role_gridcell', - 'link' : 'role_link', - 'listbox' : 'role_listbox', - 'log' : 'role_log', - 'marquee' : 'role_marquee', - 'menu' : 'role_menu', - 'menubar' : 'role_menubar', - 'menuitem' : 'role_menuitem', - 'menuitemcheckbox' : 'role_menuitemcheckbox', - 'menuitemradio' : 'role_menuitemradio', - 'option' : 'role_option', - 'progressbar' : 'role_progressbar', - 'radio' : 'role_radio', - 'radiogroup' : 'role_radiogroup', - 'rowheader' : 'role_rowheader', - 'scrollbar' : 'role_scrollbar', - 'slider' : 'role_slider', - 'spinbutton' : 'role_spinbutton', - 'status' : 'role_status', - 'tab' : 'role_tab', - 'tablist' : 'role_tablist', - 'tabpanel' : 'role_tabpanel', - 'textbox' : 'role_textbox', - 'timer' : 'role_timer', - 'toolbar' : 'role_toolbar', - 'tooltip' : 'role_tooltip', - 'treeitem' : 'role_treeitem' -}; - - -/** - * Note: If you are adding a new mapping, the new message identifier needs a - * corresponding braille message. For example, a message id 'tag_button' - * requires another message 'tag_button_brl' within messages.js. - * @type {Object<string>} - */ -cvox.AriaUtil.STRUCTURE_ROLE_TO_NAME = { - 'article' : 'role_article', - 'application' : 'role_application', - 'banner' : 'role_banner', - 'columnheader' : 'role_columnheader', - 'complementary' : 'role_complementary', - 'contentinfo' : 'role_contentinfo', - 'definition' : 'role_definition', - 'directory' : 'role_directory', - 'document' : 'role_document', - 'form' : 'role_form', - 'group' : 'role_group', - 'heading' : 'role_heading', - 'img' : 'role_img', - 'list' : 'role_list', - 'listitem' : 'role_listitem', - 'main' : 'role_main', - 'math' : 'role_math', - 'navigation' : 'role_navigation', - 'note' : 'role_note', - 'region' : 'role_region', - 'rowheader' : 'role_rowheader', - 'search' : 'role_search', - 'separator' : 'role_separator' -}; - - -/** - * @type {Array<Object>} - */ -cvox.AriaUtil.ATTRIBUTE_VALUE_TO_STATUS = [ - { name: 'aria-autocomplete', values: - {'inline' : 'aria_autocomplete_inline', - 'list' : 'aria_autocomplete_list', - 'both' : 'aria_autocomplete_both'} }, - { name: 'aria-checked', values: - {'true' : 'aria_checked_true', - 'false' : 'aria_checked_false', - 'mixed' : 'aria_checked_mixed'} }, - { name: 'aria-disabled', values: - {'true' : 'aria_disabled_true'} }, - { name: 'aria-expanded', values: - {'true' : 'aria_expanded_true', - 'false' : 'aria_expanded_false'} }, - { name: 'aria-invalid', values: - {'true' : 'aria_invalid_true', - 'grammar' : 'aria_invalid_grammar', - 'spelling' : 'aria_invalid_spelling'} }, - { name: 'aria-multiline', values: - {'true' : 'aria_multiline_true'} }, - { name: 'aria-multiselectable', values: - {'true' : 'aria_multiselectable_true'} }, - { name: 'aria-pressed', values: - {'true' : 'aria_pressed_true', - 'false' : 'aria_pressed_false', - 'mixed' : 'aria_pressed_mixed'} }, - { name: 'aria-readonly', values: - {'true' : 'aria_readonly_true'} }, - { name: 'aria-required', values: - {'true' : 'aria_required_true'} }, - { name: 'aria-selected', values: - {'true' : 'aria_selected_true', - 'false' : 'aria_selected_false'} } -]; - - -/** - * Checks if a node should be treated as a hidden node because of its ARIA - * markup. - * - * @param {Node} targetNode The node to check. - * @return {boolean} True if the targetNode should be treated as hidden. - */ -cvox.AriaUtil.isHiddenRecursive = function(targetNode) { - if (cvox.AriaUtil.isHidden(targetNode)) { - return true; - } - var parent = targetNode.parentElement; - while (parent) { - if ((parent.getAttribute('aria-hidden') == 'true') && - (parent.getAttribute('chromevoxignoreariahidden') != 'true')) { - return true; - } - parent = parent.parentElement; - } - return false; -}; - - -/** - * Checks if a node should be treated as a hidden node because of its ARIA - * markup. Does not check parents, so if you need to know if this is a - * descendant of a hidden node, call isHiddenRecursive. - * - * @param {Node} targetNode The node to check. - * @return {boolean} True if the targetNode should be treated as hidden. - */ -cvox.AriaUtil.isHidden = function(targetNode) { - if (!targetNode) { - return true; - } - if (targetNode.getAttribute) { - if ((targetNode.getAttribute('aria-hidden') == 'true') && - (targetNode.getAttribute('chromevoxignoreariahidden') != 'true')) { - return true; - } - } - return false; -}; - - -/** - * Checks if a node should be treated as a visible node because of its ARIA - * markup, regardless of whatever other styling/attributes it may have. - * It is possible to force a node to be visible by setting aria-hidden to - * false. - * - * @param {Node} targetNode The node to check. - * @return {boolean} True if the targetNode should be treated as visible. - */ -cvox.AriaUtil.isForcedVisibleRecursive = function(targetNode) { - var node = targetNode; - while (node) { - if (node.getAttribute) { - // Stop and return the result based on the closest node that has - // aria-hidden set. - if (node.hasAttribute('aria-hidden') && - (node.getAttribute('chromevoxignoreariahidden') != 'true')) { - return node.getAttribute('aria-hidden') == 'false'; - } - } - node = node.parentElement; - } - return false; -}; - - -/** - * Checks if a node should be treated as a leaf node because of its ARIA - * markup. Does not check recursively, and does not check isControlWidget. - * Note that elements with aria-label are treated as leaf elements. See: - * http://www.w3.org/TR/wai-aria/roles#textalternativecomputation - * - * @param {Element} targetElement The node to check. - * @return {boolean} True if the targetNode should be treated as a leaf node. - */ -cvox.AriaUtil.isLeafElement = function(targetElement) { - var role = targetElement.getAttribute('role'); - var hasArialLabel = targetElement.hasAttribute('aria-label') && - (targetElement.getAttribute('aria-label').length > 0); - return (role == 'img' || role == 'progressbar' || hasArialLabel); -}; - - -/** - * Determines whether or not a node is or is the descendant of a node - * with a particular role. - * - * @param {Node} node The node to be checked. - * @param {string} roleName The role to check for. - * @return {boolean} True if the node or one of its ancestor has the specified - * role. - */ -cvox.AriaUtil.isDescendantOfRole = function(node, roleName) { - while (node) { - if (roleName && node && (node.getAttribute('role') == roleName)) { - return true; - } - node = node.parentNode; - } - return false; -}; - - -/** - * Helper function to return the role name message identifier for a role. - * @param {string} role The role. - * @return {?string} The role name message identifier. - * @private - */ -cvox.AriaUtil.getRoleNameMsgForRole_ = function(role) { - var msgId = cvox.AriaUtil.WIDGET_ROLE_TO_NAME[role]; - if (!msgId) { - return null; - } - return msgId; -}; - -/** - * Returns true is the node is any kind of button. - * - * @param {Node} node The node to check. - * @return {boolean} True if the node is a button. - */ -cvox.AriaUtil.isButton = function(node) { - var role = cvox.AriaUtil.getRoleAttribute(node); - if (role == 'button') { - return true; - } - if (node.tagName == 'BUTTON') { - return true; - } - if (node.tagName == 'INPUT') { - return (node.type == 'submit' || - node.type == 'reset' || - node.type == 'button'); - } - return false; -}; - -/** - * Returns a role message identifier for a node. - * For a localized string, see cvox.AriaUtil.getRoleName. - * @param {Node} targetNode The node to get the role name for. - * @return {string} The role name message identifier for the targetNode. - */ -cvox.AriaUtil.getRoleNameMsg = function(targetNode) { - var roleName; - if (targetNode && targetNode.getAttribute) { - var role = cvox.AriaUtil.getRoleAttribute(targetNode); - - // Special case for pop-up buttons. - if (targetNode.getAttribute('aria-haspopup') == 'true' && - cvox.AriaUtil.isButton(targetNode)) { - return 'role_popup_button'; - } - - if (role) { - roleName = cvox.AriaUtil.getRoleNameMsgForRole_(role); - if (!roleName) { - roleName = cvox.AriaUtil.STRUCTURE_ROLE_TO_NAME[role]; - } - } - - // To a user, a menu item within a menu bar is called a "menu"; - // any other menu item is called a "menu item". - // - // TODO(deboer): This block feels like a hack. dmazzoni suggests - // using css-like syntax for names. Investigate further if - // we need more of these hacks. - if (role == 'menuitem') { - var container = targetNode.parentElement; - while (container) { - if (container.getAttribute && - (cvox.AriaUtil.getRoleAttribute(container) == 'menu' || - cvox.AriaUtil.getRoleAttribute(container) == 'menubar')) { - break; - } - container = container.parentElement; - } - if (container && cvox.AriaUtil.getRoleAttribute(container) == 'menubar') { - roleName = cvox.AriaUtil.getRoleNameMsgForRole_('menu'); - } // else roleName is already 'Menu item', no need to change it. - } - } - if (!roleName) { - roleName = ''; - } - return roleName; -}; - -/** - * Returns a string to be presented to the user that identifies what the - * targetNode's role is. - * - * @param {Node} targetNode The node to get the role name for. - * @return {string} The role name for the targetNode. - */ -cvox.AriaUtil.getRoleName = function(targetNode) { - var roleMsg = cvox.AriaUtil.getRoleNameMsg(targetNode); - var roleName = Msgs.getMsg(roleMsg); - var role = cvox.AriaUtil.getRoleAttribute(targetNode); - if ((role == 'heading') && (targetNode.hasAttribute('aria-level'))) { - roleName += ' ' + targetNode.getAttribute('aria-level'); - } - return roleName ? roleName : ''; -}; - -/** - * Returns a string that gives information about the state of the targetNode. - * - * @param {Node} targetNode The node to get the state information for. - * @param {boolean} primary Whether this is the primary node we're - * interested in, where we might want extra information - as - * opposed to an ancestor, where we might be more brief. - * @return {cvox.NodeState} The status information about the node. - */ -cvox.AriaUtil.getStateMsgs = function(targetNode, primary) { - var state = []; - if (!targetNode || !targetNode.getAttribute) { - return state; - } - - for (var i = 0, attr; attr = cvox.AriaUtil.ATTRIBUTE_VALUE_TO_STATUS[i]; - i++) { - var value = targetNode.getAttribute(attr.name); - var msgId = attr.values[value]; - if (msgId) { - state.push([msgId]); - } - } - if (targetNode.getAttribute('role') == 'grid') { - return cvox.AriaUtil.getGridState_(targetNode, targetNode); - } - - var role = cvox.AriaUtil.getRoleAttribute(targetNode); - if (targetNode.getAttribute('aria-haspopup') == 'true') { - if (role == 'menuitem') { - state.push(['has_submenu']); - } else if (cvox.AriaUtil.isButton(targetNode)) { - // Do nothing - the role name will be 'pop-up button'. - } else { - state.push(['has_popup']); - } - } - - var valueText = targetNode.getAttribute('aria-valuetext'); - if (valueText) { - // If there is a valueText, that always wins. - state.push(['aria_value_text', valueText]); - return state; - } - - var valueNow = targetNode.getAttribute('aria-valuenow'); - var valueMin = targetNode.getAttribute('aria-valuemin'); - var valueMax = targetNode.getAttribute('aria-valuemax'); - - // Scrollbar and progressbar should speak the percentage. - // http://www.w3.org/TR/wai-aria/roles#scrollbar - // http://www.w3.org/TR/wai-aria/roles#progressbar - if ((valueNow != null) && (valueMin != null) && (valueMax != null)) { - if ((role == 'scrollbar') || (role == 'progressbar')) { - var percent = Math.round((valueNow / (valueMax - valueMin)) * 100); - state.push(['state_percent', percent]); - return state; - } - } - - // Return as many of the value attributes as possible. - if (valueNow != null) { - state.push(['aria_value_now', valueNow]); - } - if (valueMin != null) { - state.push(['aria_value_min', valueMin]); - } - if (valueMax != null) { - state.push(['aria_value_max', valueMax]); - } - - // If this is a composite control or an item within a composite control, - // get the index and count of the current descendant or active - // descendant. - var parentControl = targetNode; - var currentDescendant = null; - - if (cvox.AriaUtil.isCompositeControl(parentControl) && primary) { - currentDescendant = cvox.AriaUtil.getActiveDescendant(parentControl); - } else { - role = cvox.AriaUtil.getRoleAttribute(targetNode); - if (role == 'option' || - role == 'menuitem' || - role == 'menuitemcheckbox' || - role == 'menuitemradio' || - role == 'radio' || - role == 'tab' || - role == 'treeitem') { - currentDescendant = targetNode; - parentControl = targetNode.parentElement; - while (parentControl && - !cvox.AriaUtil.isCompositeControl(parentControl)) { - parentControl = parentControl.parentElement; - if (parentControl && - cvox.AriaUtil.getRoleAttribute(parentControl) == 'treeitem') { - break; - } - } - } - } - - if (parentControl && - (cvox.AriaUtil.isCompositeControl(parentControl) || - cvox.AriaUtil.getRoleAttribute(parentControl) == 'treeitem') && - currentDescendant) { - var parentRole = cvox.AriaUtil.getRoleAttribute(parentControl); - var descendantRoleList; - switch (parentRole) { - case 'combobox': - case 'listbox': - descendantRoleList = ['option']; - break; - case 'menu': - descendantRoleList = ['menuitem', - 'menuitemcheckbox', - 'menuitemradio']; - break; - case 'radiogroup': - descendantRoleList = ['radio']; - break; - case 'tablist': - descendantRoleList = ['tab']; - break; - case 'tree': - case 'treegrid': - case 'treeitem': - descendantRoleList = ['treeitem']; - break; - } - - if (descendantRoleList) { - var listLength; - var currentIndex; - - var ariaLength = - parseInt(currentDescendant.getAttribute('aria-setsize'), 10); - if (!isNaN(ariaLength)) { - listLength = ariaLength; - } - var ariaIndex = - parseInt(currentDescendant.getAttribute('aria-posinset'), 10); - if (!isNaN(ariaIndex)) { - currentIndex = ariaIndex; - } - - if (listLength == undefined || currentIndex == undefined) { - var descendants = cvox.AriaUtil.getNextLevel(parentControl, - descendantRoleList); - if (listLength == undefined) { - listLength = descendants.length; - } - if (currentIndex == undefined) { - for (var j = 0; j < descendants.length; j++) { - if (descendants[j] == currentDescendant) { - currentIndex = j + 1; - } - } - } - } - if (currentIndex && listLength) { - state.push(['list_position', currentIndex, listLength]); - } - } - } - return state; -}; - - -/** - * Returns a string that gives information about the state of the grid node. - * - * @param {Node} targetNode The node to get the state information for. - * @param {Node} parentControl The parent composite control. - * @return {cvox.NodeState} The status information about the node. - * @private - */ -cvox.AriaUtil.getGridState_ = function(targetNode, parentControl) { - var activeDescendant = cvox.AriaUtil.getActiveDescendant(parentControl); - - if (activeDescendant) { - var descendantSelector = '*[role~="row"]'; - var rows = parentControl.querySelectorAll(descendantSelector); - var currentIndex = null; - for (var j = 0; j < rows.length; j++) { - var gridcells = rows[j].querySelectorAll('*[role~="gridcell"]'); - for (var k = 0; k < gridcells.length; k++) { - if (gridcells[k] == activeDescendant) { - return /** @type {cvox.NodeState} */ ( - [['role_gridcell_pos', j + 1, k + 1]]); - } - } - } - } - return []; -}; - - -/** - * Returns the id of a node's active descendant - * @param {Node} targetNode The node. - * @return {?string} The id of the active descendant. - * @private - */ -cvox.AriaUtil.getActiveDescendantId_ = function(targetNode) { - if (!targetNode.getAttribute) { - return null; - } - - var activeId = targetNode.getAttribute('aria-activedescendant'); - if (!activeId) { - return null; - } - return activeId; -}; - - -/** - * Returns the list of elements that are one aria-level below. - * - * @param {Node} parentControl The node whose descendants should be analyzed. - * @param {Array<string>} role The role(s) of descendant we are looking for. - * @return {Array<Node>} The array of matching nodes. - */ -cvox.AriaUtil.getNextLevel = function(parentControl, role) { - var result = []; - var children = parentControl.childNodes; - var length = children.length; - for (var i = 0; i < children.length; i++) { - if (cvox.AriaUtil.isHidden(children[i]) || - !cvox.DomUtil.isVisible(children[i])) { - continue; - } - var nextLevel = cvox.AriaUtil.getNextLevelItems(children[i], role); - if (nextLevel.length > 0) { - result = result.concat(nextLevel); - } - } - return result; -}; - - -/** - * Recursively finds the first node(s) that match the role. - * - * @param {Element} current The node to start looking at. - * @param {Array<string>} role The role(s) to match. - * @return {Array<Element>} The array of matching nodes. - */ -cvox.AriaUtil.getNextLevelItems = function(current, role) { - if (current.nodeType != 1) { // If reached a node that is not an element. - return []; - } - if (role.indexOf(cvox.AriaUtil.getRoleAttribute(current)) != -1) { - return [current]; - } else { - var children = current.childNodes; - var length = children.length; - if (length == 0) { - return []; - } else { - var resultArray = []; - for (var i = 0; i < length; i++) { - var result = cvox.AriaUtil.getNextLevelItems(children[i], role); - if (result.length > 0) { - resultArray = resultArray.concat(result); - } - } - return resultArray; - } - } -}; - - -/** - * If the node is an object with an active descendant, returns the - * descendant node. - * - * This function will fully resolve an active descendant chain. If a circular - * chain is detected, it will return null. - * - * @param {Node} targetNode The node to get descendant information for. - * @return {Node} The descendant node or null if no node exists. - */ -cvox.AriaUtil.getActiveDescendant = function(targetNode) { - var seenIds = {}; - var node = targetNode; - - while (node) { - var activeId = cvox.AriaUtil.getActiveDescendantId_(node); - if (!activeId) { - break; - } - if (activeId in seenIds) { - // A circlar activeDescendant is an error, so return null. - return null; - } - seenIds[activeId] = true; - node = document.getElementById(activeId); - } - - if (node == targetNode) { - return null; - } - return node; -}; - - -/** - * Given a node, returns true if it's an ARIA control widget. Control widgets - * are treated as leaf nodes. - * - * @param {Node} targetNode The node to be checked. - * @return {boolean} Whether the targetNode is an ARIA control widget. - */ -cvox.AriaUtil.isControlWidget = function(targetNode) { - if (targetNode && targetNode.getAttribute) { - var role = cvox.AriaUtil.getRoleAttribute(targetNode); - switch (role) { - case 'button': - case 'checkbox': - case 'combobox': - case 'listbox': - case 'menu': - case 'menuitemcheckbox': - case 'menuitemradio': - case 'radio': - case 'slider': - case 'progressbar': - case 'scrollbar': - case 'spinbutton': - case 'tab': - case 'tablist': - case 'textbox': - return true; - } - } - return false; -}; - - -/** - * Given a node, returns true if it's an ARIA composite control. - * - * @param {Node} targetNode The node to be checked. - * @return {boolean} Whether the targetNode is an ARIA composite control. - */ -cvox.AriaUtil.isCompositeControl = function(targetNode) { - if (targetNode && targetNode.getAttribute) { - var role = cvox.AriaUtil.getRoleAttribute(targetNode); - switch (role) { - case 'combobox': - case 'grid': - case 'listbox': - case 'menu': - case 'menubar': - case 'radiogroup': - case 'tablist': - case 'tree': - case 'treegrid': - return true; - } - } - return false; -}; - - -/** - * Given a node, returns its 'aria-live' value if it's a live region, or - * null otherwise. - * - * @param {Node} node The node to be checked. - * @return {?string} The live region value, like 'polite' or - * 'assertive', or null if 'off' or none. - */ -cvox.AriaUtil.getAriaLive = function(node) { - if (!node.hasAttribute) - return null; - var value = node.getAttribute('aria-live'); - if (value == 'off') { - return null; - } else if (value) { - return value; - } - var role = cvox.AriaUtil.getRoleAttribute(node); - switch (role) { - case 'alert': - return 'assertive'; - case 'log': - case 'status': - return 'polite'; - default: - return null; - } -}; - - -/** - * Given a node, returns its 'aria-atomic' value. - * - * @param {Node} node The node to be checked. - * @return {boolean} The aria-atomic live region value, either true or false. - */ -cvox.AriaUtil.getAriaAtomic = function(node) { - if (!node.hasAttribute) - return false; - var value = node.getAttribute('aria-atomic'); - if (value) { - return (value === 'true'); - } - var role = cvox.AriaUtil.getRoleAttribute(node); - if (role == 'alert') { - return true; - } - return false; -}; - - -/** - * Given a node, returns its 'aria-busy' value. - * - * @param {Node} node The node to be checked. - * @return {boolean} The aria-busy live region value, either true or false. - */ -cvox.AriaUtil.getAriaBusy = function(node) { - if (!node.hasAttribute) - return false; - var value = node.getAttribute('aria-busy'); - if (value) { - return (value === 'true'); - } - return false; -}; - - -/** - * Given a node, checks its aria-relevant attribute (with proper inheritance) - * and determines whether the given change (additions, removals, text, all) - * is relevant and should be announced. - * - * @param {Node} node The node to be checked. - * @param {string} change The name of the change to check - one of - * 'additions', 'removals', 'text', 'all'. - * @return {boolean} True if that change is relevant to that node as part of - * a live region. - */ -cvox.AriaUtil.getAriaRelevant = function(node, change) { - if (!node.hasAttribute) - return false; - var value; - if (node.hasAttribute('aria-relevant')) { - value = node.getAttribute('aria-relevant'); - } else { - value = 'additions text'; - } - if (value == 'all') { - value = 'additions removals text'; - } - - var tokens = value.replace(/\s+/g, ' ').replace(/^\s+|\s+$/g, '').split(' '); - - if (change == 'all') { - return (tokens.indexOf('additions') >= 0 && - tokens.indexOf('text') >= 0 && - tokens.indexOf('removals') >= 0); - } else { - return (tokens.indexOf(change) >= 0); - } -}; - - -/** - * Given a node, return all live regions that are either rooted at this - * node or contain this node. - * - * @param {Node} node The node to be checked. - * @return {Array<Element>} All live regions affected by this node changing. - */ -cvox.AriaUtil.getLiveRegions = function(node) { - var result = []; - if (node.querySelectorAll) { - var nodes = node.querySelectorAll( - '[role="alert"], [role="log"], [role="marquee"], ' + - '[role="status"], [role="timer"], [aria-live]'); - if (nodes) { - for (var i = 0; i < nodes.length; i++) { - result.push(nodes[i]); - } - } - } - - while (node) { - if (cvox.AriaUtil.getAriaLive(node)) { - result.push(node); - return result; - } - node = node.parentElement; - } - - return result; -}; - - -/** - * Checks to see whether or not a node is an ARIA landmark. - * - * @param {Node} node The node to be checked. - * @return {boolean} Whether or not the node is an ARIA landmark. - */ -cvox.AriaUtil.isLandmark = function(node) { - if (!node || !node.getAttribute) { - return false; - } - var role = cvox.AriaUtil.getRoleAttribute(node); - switch (role) { - case 'application': - case 'banner': - case 'complementary': - case 'contentinfo': - case 'form': - case 'main': - case 'navigation': - case 'search': - return true; - } - return false; -}; - - -/** - * Checks to see whether or not a node is an ARIA grid. - * - * @param {Node} node The node to be checked. - * @return {boolean} Whether or not the node is an ARIA grid. - */ -cvox.AriaUtil.isGrid = function(node) { - if (!node || !node.getAttribute) { - return false; - } - var role = cvox.AriaUtil.getRoleAttribute(node); - switch (role) { - case 'grid': - case 'treegrid': - return true; - } - return false; -}; - - -/** - * Returns the id of an earcon to play along with the description for a node. - * - * @param {Node} node The node to get the earcon for. - * @return {cvox.Earcon?} The earcon id, or null if none applies. - */ -cvox.AriaUtil.getEarcon = function(node) { - if (!node || !node.getAttribute) { - return null; - } - var role = cvox.AriaUtil.getRoleAttribute(node); - switch (role) { - case 'button': - return cvox.Earcon.BUTTON; - case 'checkbox': - case 'radio': - case 'menuitemcheckbox': - case 'menuitemradio': - var checked = node.getAttribute('aria-checked'); - if (checked == 'true') { - return cvox.Earcon.CHECK_ON; - } else { - return cvox.Earcon.CHECK_OFF; - } - case 'combobox': - case 'listbox': - return cvox.Earcon.LISTBOX; - case 'textbox': - return cvox.Earcon.EDITABLE_TEXT; - case 'listitem': - return cvox.Earcon.LIST_ITEM; - case 'link': - return cvox.Earcon.LINK; - } - - return null; -}; - - -/** - * Returns the role of the node. - * - * This is equivalent to targetNode.getAttribute('role') - * except it also takes into account cases where ChromeVox - * itself has changed the role (ie, adding role="application" - * to BODY elements for better screen reader compatibility. - * - * @param {Node} targetNode The node to get the role for. - * @return {string} role of the targetNode. - */ -cvox.AriaUtil.getRoleAttribute = function(targetNode) { - if (!targetNode.getAttribute) { - return ''; - } - var role = targetNode.getAttribute('role'); - if (targetNode.hasAttribute('chromevoxoriginalrole')) { - role = targetNode.getAttribute('chromevoxoriginalrole'); - } - return role; -}; - - -/** - * Checks to see whether or not a node is an ARIA math node. - * - * @param {Node} node The node to be checked. - * @return {boolean} Whether or not the node is an ARIA math node. - */ -cvox.AriaUtil.isMath = function(node) { - if (!node || !node.getAttribute) { - return false; - } - var role = cvox.AriaUtil.getRoleAttribute(node); - return role == 'math'; -}; |