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gecko-dev/accessible/jsat/OutputGenerator.jsm

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JavaScript
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/* 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/. */
/* exported UtteranceGenerator, BrailleGenerator */
"use strict";
const {utils: Cu, interfaces: Ci} = Components;
const INCLUDE_DESC = 0x01;
const INCLUDE_NAME = 0x02;
const INCLUDE_VALUE = 0x04;
const NAME_FROM_SUBTREE_RULE = 0x10;
const IGNORE_EXPLICIT_NAME = 0x20;
const OUTPUT_DESC_FIRST = 0;
const OUTPUT_DESC_LAST = 1;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Utils", // jshint ignore:line
"resource://gre/modules/accessibility/Utils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "PrefCache", // jshint ignore:line
"resource://gre/modules/accessibility/Utils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Logger", // jshint ignore:line
"resource://gre/modules/accessibility/Utils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Roles", // jshint ignore:line
"resource://gre/modules/accessibility/Constants.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "States", // jshint ignore:line
"resource://gre/modules/accessibility/Constants.jsm");
this.EXPORTED_SYMBOLS = ["UtteranceGenerator", "BrailleGenerator"]; // jshint ignore:line
var OutputGenerator = {
defaultOutputOrder: OUTPUT_DESC_LAST,
/**
* Generates output for a PivotContext.
* @param {PivotContext} aContext object that generates and caches
* context information for a given accessible and its relationship with
* another accessible.
* @return {Object} An array of speech data. Depending on the utterance order,
* the data describes the context for an accessible object either
* starting from the accessible's ancestry or accessible's subtree.
*/
genForContext: function genForContext(aContext) {
let output = [];
let self = this;
let addOutput = function addOutput(aAccessible) {
output.push.apply(output, self.genForObject(aAccessible, aContext));
};
let ignoreSubtree = function ignoreSubtree(aAccessible) {
let roleString = Utils.AccService.getStringRole(aAccessible.role);
let nameRule = self.roleRuleMap[roleString] || 0;
// Ignore subtree if the name is explicit and the role's name rule is the
// NAME_FROM_SUBTREE_RULE.
return (((nameRule & INCLUDE_VALUE) && aAccessible.value) ||
((nameRule & NAME_FROM_SUBTREE_RULE) &&
(Utils.getAttributes(aAccessible)["explicit-name"] === "true" &&
!(nameRule & IGNORE_EXPLICIT_NAME))));
};
let contextStart = this._getContextStart(aContext);
if (this.outputOrder === OUTPUT_DESC_FIRST) {
contextStart.forEach(addOutput);
addOutput(aContext.accessible);
for (let node of aContext.subtreeGenerator(true, ignoreSubtree)) {
addOutput(node);
}
} else {
for (let node of aContext.subtreeGenerator(false, ignoreSubtree)) {
addOutput(node);
}
addOutput(aContext.accessible);
// If there are any documents in new ancestry, find a first one and place
// it in the beginning of the utterance.
let doc, docIndex = contextStart.findIndex(
ancestor => ancestor.role === Roles.DOCUMENT);
if (docIndex > -1) {
doc = contextStart.splice(docIndex, 1)[0];
}
contextStart.reverse().forEach(addOutput);
if (doc) {
output.unshift.apply(output, self.genForObject(doc, aContext));
}
}
return output;
},
/**
* Generates output for an object.
* @param {nsIAccessible} aAccessible accessible object to generate output
* for.
* @param {PivotContext} aContext object that generates and caches
* context information for a given accessible and its relationship with
* another accessible.
* @return {Array} A 2 element array of speech data. The first element
* describes the object and its state. The second element is the object's
* name. Whether the object's description or it's role is included is
* determined by {@link roleRuleMap}.
*/
genForObject: function genForObject(aAccessible, aContext) {
let roleString = Utils.AccService.getStringRole(aAccessible.role);
let func = this.objectOutputFunctions[
OutputGenerator._getOutputName(roleString)] ||
this.objectOutputFunctions.defaultFunc;
let flags = this.roleRuleMap[roleString] || 0;
if (aAccessible.childCount === 0) {
flags |= INCLUDE_NAME;
}
return func.apply(this, [aAccessible, roleString,
Utils.getState(aAccessible), flags, aContext]);
},
/**
* Generates output for an action performed.
* @param {nsIAccessible} aAccessible accessible object that the action was
* invoked in.
* @param {string} aActionName the name of the action, one of the keys in
* {@link gActionMap}.
* @return {Array} A one element array with action data.
*/
genForAction: function genForAction(aObject, aActionName) {}, // jshint ignore:line
/**
* Generates output for an announcement.
* @param {string} aAnnouncement unlocalized announcement.
* @return {Array} An announcement speech data to be localized.
*/
genForAnnouncement: function genForAnnouncement(aAnnouncement) {}, // jshint ignore:line
/**
* Generates output for a tab state change.
* @param {nsIAccessible} aAccessible accessible object of the tab's attached
* document.
* @param {string} aTabState the tab state name, see
* {@link Presenter.tabStateChanged}.
* @return {Array} The tab state utterace.
*/
genForTabStateChange: function genForTabStateChange(aObject, aTabState) {}, // jshint ignore:line
/**
* Generates output for announcing entering and leaving editing mode.
* @param {aIsEditing} boolean true if we are in editing mode
* @return {Array} The mode utterance
*/
genForEditingMode: function genForEditingMode(aIsEditing) {}, // jshint ignore:line
_getContextStart: function getContextStart(aContext) {}, // jshint ignore:line
/**
* Adds an accessible name and description to the output if available.
* @param {Array} aOutput Output array.
* @param {nsIAccessible} aAccessible current accessible object.
* @param {Number} aFlags output flags.
*/
_addName: function _addName(aOutput, aAccessible, aFlags) {
let name;
if ((Utils.getAttributes(aAccessible)["explicit-name"] === "true" &&
!(aFlags & IGNORE_EXPLICIT_NAME)) || (aFlags & INCLUDE_NAME)) {
name = aAccessible.name;
}
let description = aAccessible.description;
if (description) {
// Compare against the calculated name unconditionally, regardless of name rule,
// so we can make sure we don't speak duplicated descriptions
let tmpName = name || aAccessible.name;
if (tmpName && (description !== tmpName)) {
if (name) {
name = this.outputOrder === OUTPUT_DESC_FIRST ?
description + " - " + name :
name + " - " + description;
} else {
name = description;
}
}
}
if (!name || !name.trim()) {
return;
}
aOutput[this.outputOrder === OUTPUT_DESC_FIRST ? "push" : "unshift"](name);
},
/**
* Adds a landmark role to the output if available.
* @param {Array} aOutput Output array.
* @param {nsIAccessible} aAccessible current accessible object.
*/
_addLandmark: function _addLandmark(aOutput, aAccessible) {
let landmarkName = Utils.getLandmarkName(aAccessible);
if (!landmarkName) {
return;
}
aOutput[this.outputOrder === OUTPUT_DESC_FIRST ? "unshift" : "push"]({
string: landmarkName
});
},
/**
* Adds math roles to the output, for a MathML accessible.
* @param {Array} aOutput Output array.
* @param {nsIAccessible} aAccessible current accessible object.
* @param {String} aRoleStr aAccessible's role string.
*/
_addMathRoles: function _addMathRoles(aOutput, aAccessible, aRoleStr) {
// First, determine the actual role to use (e.g. mathmlfraction).
let roleStr = aRoleStr;
switch (aAccessible.role) {
case Roles.MATHML_CELL:
case Roles.MATHML_ENCLOSED:
case Roles.MATHML_LABELED_ROW:
case Roles.MATHML_ROOT:
case Roles.MATHML_SQUARE_ROOT:
case Roles.MATHML_TABLE:
case Roles.MATHML_TABLE_ROW:
// Use the default role string.
break;
case Roles.MATHML_MULTISCRIPTS:
case Roles.MATHML_OVER:
case Roles.MATHML_SUB:
case Roles.MATHML_SUB_SUP:
case Roles.MATHML_SUP:
case Roles.MATHML_UNDER:
case Roles.MATHML_UNDER_OVER:
// For scripted accessibles, use the string 'mathmlscripted'.
roleStr = "mathmlscripted";
break;
case Roles.MATHML_FRACTION:
// From a semantic point of view, the only important point is to
// distinguish between fractions that have a bar and those that do not.
// Per the MathML 3 spec, the latter happens iff the linethickness
// attribute is of the form [zero-float][optional-unit]. In that case,
// we use the string 'mathmlfractionwithoutbar'.
let linethickness = Utils.getAttributes(aAccessible).linethickness;
if (linethickness) {
let numberMatch = linethickness.match(/^(?:\d|\.)+/);
if (numberMatch && !parseFloat(numberMatch[0])) {
roleStr += "withoutbar";
}
}
break;
default:
// Otherwise, do not output the actual role.
roleStr = null;
break;
}
// Get the math role based on the position in the parent accessible
// (e.g. numerator for the first child of a mathmlfraction).
let mathRole = Utils.getMathRole(aAccessible);
if (mathRole) {
aOutput[this.outputOrder === OUTPUT_DESC_FIRST ? "push" : "unshift"]({
string: this._getOutputName(mathRole)});
}
if (roleStr) {
aOutput[this.outputOrder === OUTPUT_DESC_FIRST ? "push" : "unshift"]({
string: this._getOutputName(roleStr)});
}
},
/**
* Adds MathML menclose notations to the output.
* @param {Array} aOutput Output array.
* @param {nsIAccessible} aAccessible current accessible object.
*/
_addMencloseNotations: function _addMencloseNotations(aOutput, aAccessible) {
let notations = Utils.getAttributes(aAccessible).notation || "longdiv";
aOutput[this.outputOrder === OUTPUT_DESC_FIRST ? "push" : "unshift"].apply(
aOutput, notations.split(" ").map(notation => {
return { string: this._getOutputName("notation-" + notation) };
}));
},
/**
* Adds an entry type attribute to the description if available.
* @param {Array} aOutput Output array.
* @param {nsIAccessible} aAccessible current accessible object.
* @param {String} aRoleStr aAccessible's role string.
*/
_addType: function _addType(aOutput, aAccessible, aRoleStr) {
if (aRoleStr !== "entry") {
return;
}
let typeName = Utils.getAttributes(aAccessible)["text-input-type"];
// Ignore the the input type="text" case.
if (!typeName || typeName === "text") {
return;
}
aOutput.push({string: "textInputType_" + typeName});
},
_addState: function _addState(aOutput, aState, aRoleStr) {}, // jshint ignore:line
_addRole: function _addRole(aOutput, aAccessible, aRoleStr) {}, // jshint ignore:line
get outputOrder() {
if (!this._utteranceOrder) {
this._utteranceOrder = new PrefCache("accessibility.accessfu.utterance");
}
return typeof this._utteranceOrder.value === "number" ?
this._utteranceOrder.value : this.defaultOutputOrder;
},
_getOutputName: function _getOutputName(aName) {
return aName.replace(/\s/g, "");
},
roleRuleMap: {
"menubar": INCLUDE_DESC,
"scrollbar": INCLUDE_DESC,
"grip": INCLUDE_DESC,
"alert": INCLUDE_DESC | INCLUDE_NAME,
"menupopup": INCLUDE_DESC,
"menuitem": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"tooltip": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"columnheader": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"rowheader": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"column": NAME_FROM_SUBTREE_RULE,
"row": NAME_FROM_SUBTREE_RULE,
"cell": INCLUDE_DESC | INCLUDE_NAME,
"application": INCLUDE_NAME,
"document": INCLUDE_NAME,
"grouping": INCLUDE_DESC | INCLUDE_NAME,
"toolbar": INCLUDE_DESC,
"table": INCLUDE_DESC | INCLUDE_NAME,
"link": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"helpballoon": NAME_FROM_SUBTREE_RULE,
"list": INCLUDE_DESC | INCLUDE_NAME,
"listitem": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"outline": INCLUDE_DESC,
"outlineitem": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"pagetab": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"graphic": INCLUDE_DESC,
"switch": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"pushbutton": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"checkbutton": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"radiobutton": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"buttondropdown": NAME_FROM_SUBTREE_RULE,
"combobox": INCLUDE_DESC | INCLUDE_VALUE,
"droplist": INCLUDE_DESC,
"progressbar": INCLUDE_DESC | INCLUDE_VALUE,
"slider": INCLUDE_DESC | INCLUDE_VALUE,
"spinbutton": INCLUDE_DESC | INCLUDE_VALUE,
"diagram": INCLUDE_DESC,
"animation": INCLUDE_DESC,
"equation": INCLUDE_DESC,
"buttonmenu": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"buttondropdowngrid": NAME_FROM_SUBTREE_RULE,
"pagetablist": INCLUDE_DESC,
"canvas": INCLUDE_DESC,
"check menu item": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"label": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"password text": INCLUDE_DESC,
"popup menu": INCLUDE_DESC,
"radio menu item": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"table column header": NAME_FROM_SUBTREE_RULE,
"table row header": NAME_FROM_SUBTREE_RULE,
"tear off menu item": NAME_FROM_SUBTREE_RULE,
"toggle button": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"parent menuitem": NAME_FROM_SUBTREE_RULE,
"header": INCLUDE_DESC,
"footer": INCLUDE_DESC,
"entry": INCLUDE_DESC | INCLUDE_NAME | INCLUDE_VALUE,
"caption": INCLUDE_DESC,
"document frame": INCLUDE_DESC,
"heading": INCLUDE_DESC,
"calendar": INCLUDE_DESC | INCLUDE_NAME,
"combobox option": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"listbox option": INCLUDE_DESC | NAME_FROM_SUBTREE_RULE,
"listbox rich option": NAME_FROM_SUBTREE_RULE,
"gridcell": NAME_FROM_SUBTREE_RULE,
"check rich option": NAME_FROM_SUBTREE_RULE,
"term": NAME_FROM_SUBTREE_RULE,
"definition": NAME_FROM_SUBTREE_RULE,
"key": NAME_FROM_SUBTREE_RULE,
"image map": INCLUDE_DESC,
"option": INCLUDE_DESC,
"listbox": INCLUDE_DESC,
"definitionlist": INCLUDE_DESC | INCLUDE_NAME,
"dialog": INCLUDE_DESC | INCLUDE_NAME,
"chrome window": IGNORE_EXPLICIT_NAME,
"app root": IGNORE_EXPLICIT_NAME,
"statusbar": NAME_FROM_SUBTREE_RULE,
"mathml table": INCLUDE_DESC | INCLUDE_NAME,
"mathml labeled row": NAME_FROM_SUBTREE_RULE,
"mathml table row": NAME_FROM_SUBTREE_RULE,
"mathml cell": INCLUDE_DESC | INCLUDE_NAME,
"mathml fraction": INCLUDE_DESC,
"mathml square root": INCLUDE_DESC,
"mathml root": INCLUDE_DESC,
"mathml enclosed": INCLUDE_DESC,
"mathml sub": INCLUDE_DESC,
"mathml sup": INCLUDE_DESC,
"mathml sub sup": INCLUDE_DESC,
"mathml under": INCLUDE_DESC,
"mathml over": INCLUDE_DESC,
"mathml under over": INCLUDE_DESC,
"mathml multiscripts": INCLUDE_DESC,
"mathml identifier": INCLUDE_DESC,
"mathml number": INCLUDE_DESC,
"mathml operator": INCLUDE_DESC,
"mathml text": INCLUDE_DESC,
"mathml string literal": INCLUDE_DESC,
"mathml row": INCLUDE_DESC,
"mathml style": INCLUDE_DESC,
"mathml error": INCLUDE_DESC },
mathmlRolesSet: new Set([
Roles.MATHML_MATH,
Roles.MATHML_IDENTIFIER,
Roles.MATHML_NUMBER,
Roles.MATHML_OPERATOR,
Roles.MATHML_TEXT,
Roles.MATHML_STRING_LITERAL,
Roles.MATHML_GLYPH,
Roles.MATHML_ROW,
Roles.MATHML_FRACTION,
Roles.MATHML_SQUARE_ROOT,
Roles.MATHML_ROOT,
Roles.MATHML_FENCED,
Roles.MATHML_ENCLOSED,
Roles.MATHML_STYLE,
Roles.MATHML_SUB,
Roles.MATHML_SUP,
Roles.MATHML_SUB_SUP,
Roles.MATHML_UNDER,
Roles.MATHML_OVER,
Roles.MATHML_UNDER_OVER,
Roles.MATHML_MULTISCRIPTS,
Roles.MATHML_TABLE,
Roles.LABELED_ROW,
Roles.MATHML_TABLE_ROW,
Roles.MATHML_CELL,
Roles.MATHML_ACTION,
Roles.MATHML_ERROR,
Roles.MATHML_STACK,
Roles.MATHML_LONG_DIVISION,
Roles.MATHML_STACK_GROUP,
Roles.MATHML_STACK_ROW,
Roles.MATHML_STACK_CARRIES,
Roles.MATHML_STACK_CARRY,
Roles.MATHML_STACK_LINE
]),
objectOutputFunctions: {
_generateBaseOutput:
function _generateBaseOutput(aAccessible, aRoleStr, aState, aFlags) {
let output = [];
if (aFlags & INCLUDE_DESC) {
this._addState(output, aState, aRoleStr);
this._addType(output, aAccessible, aRoleStr);
this._addRole(output, aAccessible, aRoleStr);
}
if (aFlags & INCLUDE_VALUE && aAccessible.value.trim()) {
output[this.outputOrder === OUTPUT_DESC_FIRST ? "push" : "unshift"](
aAccessible.value);
}
this._addName(output, aAccessible, aFlags);
this._addLandmark(output, aAccessible);
return output;
},
label: function label(aAccessible, aRoleStr, aState, aFlags, aContext) {
if (aContext.isNestedControl ||
aContext.accessible == Utils.getEmbeddedControl(aAccessible)) {
// If we are on a nested control, or a nesting label,
// we don't need the context.
return [];
}
return this.objectOutputFunctions.defaultFunc.apply(this, arguments);
},
entry: function entry(aAccessible, aRoleStr, aState, aFlags) {
let rolestr = aState.contains(States.MULTI_LINE) ? "textarea" : "entry";
return this.objectOutputFunctions.defaultFunc.apply(
this, [aAccessible, rolestr, aState, aFlags]);
},
pagetab: function pagetab(aAccessible, aRoleStr, aState, aFlags) {
let itemno = {};
let itemof = {};
aAccessible.groupPosition({}, itemof, itemno);
let output = [];
this._addState(output, aState);
this._addRole(output, aAccessible, aRoleStr);
output.push({
string: "objItemOfN",
args: [itemno.value, itemof.value]
});
this._addName(output, aAccessible, aFlags);
this._addLandmark(output, aAccessible);
return output;
},
table: function table(aAccessible, aRoleStr, aState, aFlags) {
let output = [];
let table;
try {
table = aAccessible.QueryInterface(Ci.nsIAccessibleTable);
} catch (x) {
Logger.logException(x);
return output;
} finally {
// Check if it's a layout table, and bail out if true.
// We don't want to speak any table information for layout tables.
if (table.isProbablyForLayout()) {
return output;
}
this._addRole(output, aAccessible, aRoleStr);
output.push.call(output, {
string: this._getOutputName("tblColumnInfo"),
count: table.columnCount
}, {
string: this._getOutputName("tblRowInfo"),
count: table.rowCount
});
this._addName(output, aAccessible, aFlags);
this._addLandmark(output, aAccessible);
return output;
}
},
gridcell: function gridcell(aAccessible, aRoleStr, aState, aFlags) {
let output = [];
this._addState(output, aState);
this._addName(output, aAccessible, aFlags);
this._addLandmark(output, aAccessible);
return output;
},
// Use the table output functions for MathML tabular elements.
mathmltable: function mathmltable() {
return this.objectOutputFunctions.table.apply(this, arguments);
},
mathmlcell: function mathmlcell() {
return this.objectOutputFunctions.cell.apply(this, arguments);
},
mathmlenclosed: function mathmlenclosed(aAccessible, aRoleStr, aState,
aFlags, aContext) {
let output = this.objectOutputFunctions.defaultFunc.
apply(this, [aAccessible, aRoleStr, aState, aFlags, aContext]);
this._addMencloseNotations(output, aAccessible);
return output;
}
}
};
/**
* Generates speech utterances from objects, actions and state changes.
* An utterance is an array of speech data.
*
* It should not be assumed that flattening an utterance array would create a
* gramatically correct sentence. For example, {@link genForObject} might
* return: ['graphic', 'Welcome to my home page'].
* Each string element in an utterance should be gramatically correct in itself.
* Another example from {@link genForObject}: ['list item 2 of 5', 'Alabama'].
*
* An utterance is ordered from the least to the most important. Speaking the
* last string usually makes sense, but speaking the first often won't.
* For example {@link genForAction} might return ['button', 'clicked'] for a
* clicked event. Speaking only 'clicked' makes sense. Speaking 'button' does
* not.
*/
this.UtteranceGenerator = { // jshint ignore:line
__proto__: OutputGenerator, // jshint ignore:line
gActionMap: {
jump: "jumpAction",
press: "pressAction",
check: "checkAction",
uncheck: "uncheckAction",
on: "onAction",
off: "offAction",
select: "selectAction",
unselect: "unselectAction",
open: "openAction",
close: "closeAction",
switch: "switchAction",
click: "clickAction",
collapse: "collapseAction",
expand: "expandAction",
activate: "activateAction",
cycle: "cycleAction"
},
// TODO: May become more verbose in the future.
genForAction: function genForAction(aObject, aActionName) {
return [{string: this.gActionMap[aActionName]}];
},
genForLiveRegion:
function genForLiveRegion(aContext, aIsHide, aModifiedText) {
let utterance = [];
if (aIsHide) {
utterance.push({string: "hidden"});
}
return utterance.concat(aModifiedText || this.genForContext(aContext));
},
genForAnnouncement: function genForAnnouncement(aAnnouncement) {
return [{
string: aAnnouncement
}];
},
genForTabStateChange: function genForTabStateChange(aObject, aTabState) {
switch (aTabState) {
case "newtab":
return [{string: "tabNew"}];
case "loading":
return [{string: "tabLoading"}];
case "loaded":
return [aObject.name, {string: "tabLoaded"}];
case "loadstopped":
return [{string: "tabLoadStopped"}];
case "reload":
return [{string: "tabReload"}];
default:
return [];
}
},
genForEditingMode: function genForEditingMode(aIsEditing) {
return [{string: aIsEditing ? "editingMode" : "navigationMode"}];
},
objectOutputFunctions: {
__proto__: OutputGenerator.objectOutputFunctions, // jshint ignore:line
defaultFunc: function defaultFunc() {
return this.objectOutputFunctions._generateBaseOutput.apply(
this, arguments);
},
heading: function heading(aAccessible, aRoleStr, aState, aFlags) {
let level = {};
aAccessible.groupPosition(level, {}, {});
let utterance = [{string: "headingLevel", args: [level.value]}];
this._addName(utterance, aAccessible, aFlags);
this._addLandmark(utterance, aAccessible);
return utterance;
},
listitem: function listitem(aAccessible, aRoleStr, aState, aFlags) {
let itemno = {};
let itemof = {};
aAccessible.groupPosition({}, itemof, itemno);
let utterance = [];
if (itemno.value == 1) {
// Start of list
utterance.push({string: "listStart"});
} else if (itemno.value == itemof.value) {
// last item
utterance.push({string: "listEnd"});
}
this._addName(utterance, aAccessible, aFlags);
this._addLandmark(utterance, aAccessible);
return utterance;
},
list: function list(aAccessible, aRoleStr, aState, aFlags) {
return this._getListUtterance(aAccessible, aRoleStr, aFlags,
aAccessible.childCount);
},
definitionlist:
function definitionlist(aAccessible, aRoleStr, aState, aFlags) {
return this._getListUtterance(aAccessible, aRoleStr, aFlags,
aAccessible.childCount / 2);
},
application: function application(aAccessible, aRoleStr, aState, aFlags) {
// Don't utter location of applications, it gets tiring.
if (aAccessible.name != aAccessible.DOMNode.location) {
return this.objectOutputFunctions.defaultFunc.apply(this,
[aAccessible, aRoleStr, aState, aFlags]);
}
return [];
},
cell: function cell(aAccessible, aRoleStr, aState, aFlags, aContext) {
let utterance = [];
let cell = aContext.getCellInfo(aAccessible);
if (cell) {
let addCellChanged =
function addCellChanged(aUtterance, aChanged, aString, aIndex) {
if (aChanged) {
aUtterance.push({string: aString, args: [aIndex + 1]});
}
};
let addExtent = function addExtent(aUtterance, aExtent, aString) {
if (aExtent > 1) {
aUtterance.push({string: aString, args: [aExtent]});
}
};
let addHeaders = function addHeaders(aUtterance, aHeaders) {
if (aHeaders.length > 0) {
aUtterance.push.apply(aUtterance, aHeaders);
}
};
addCellChanged(utterance, cell.columnChanged, "columnInfo",
cell.columnIndex);
addCellChanged(utterance, cell.rowChanged, "rowInfo", cell.rowIndex);
addExtent(utterance, cell.columnExtent, "spansColumns");
addExtent(utterance, cell.rowExtent, "spansRows");
addHeaders(utterance, cell.columnHeaders);
addHeaders(utterance, cell.rowHeaders);
}
this._addName(utterance, aAccessible, aFlags);
this._addLandmark(utterance, aAccessible);
return utterance;
},
columnheader: function columnheader() {
return this.objectOutputFunctions.cell.apply(this, arguments);
},
rowheader: function rowheader() {
return this.objectOutputFunctions.cell.apply(this, arguments);
},
statictext: function statictext(aAccessible) {
if (Utils.isListItemDecorator(aAccessible, true)) {
return [];
}
return this.objectOutputFunctions.defaultFunc.apply(this, arguments);
}
},
_getContextStart: function _getContextStart(aContext) {
return aContext.newAncestry;
},
_addRole: function _addRole(aOutput, aAccessible, aRoleStr) {
if (this.mathmlRolesSet.has(aAccessible.role)) {
this._addMathRoles(aOutput, aAccessible, aRoleStr);
} else {
aOutput.push({string: this._getOutputName(aRoleStr)});
}
},
_addState: function _addState(aOutput, aState, aRoleStr) {
if (aState.contains(States.UNAVAILABLE)) {
aOutput.push({string: "stateUnavailable"});
}
if (aState.contains(States.READONLY)) {
aOutput.push({string: "stateReadonly"});
}
// Don't utter this in Jelly Bean, we let TalkBack do it for us there.
// This is because we expose the checked information on the node itself.
// XXX: this means the checked state is always appended to the end,
// regardless of the utterance ordering preference.
if ((Utils.AndroidSdkVersion < 16 || Utils.MozBuildApp === "browser") &&
aState.contains(States.CHECKABLE)) {
let checked = aState.contains(States.CHECKED);
let statetr;
if (aRoleStr === "switch") {
statetr = checked ? "stateOn" : "stateOff";
} else {
statetr = checked ? "stateChecked" : "stateNotChecked";
}
aOutput.push({string: statetr});
}
if (aState.contains(States.PRESSED)) {
aOutput.push({string: "statePressed"});
}
if (aState.contains(States.EXPANDABLE)) {
let statetr = aState.contains(States.EXPANDED) ?
"stateExpanded" : "stateCollapsed";
aOutput.push({string: statetr});
}
if (aState.contains(States.REQUIRED)) {
aOutput.push({string: "stateRequired"});
}
if (aState.contains(States.TRAVERSED)) {
aOutput.push({string: "stateTraversed"});
}
if (aState.contains(States.HASPOPUP)) {
aOutput.push({string: "stateHasPopup"});
}
if (aState.contains(States.SELECTED)) {
aOutput.push({string: "stateSelected"});
}
},
_getListUtterance:
function _getListUtterance(aAccessible, aRoleStr, aFlags, aItemCount) {
let utterance = [];
this._addRole(utterance, aAccessible, aRoleStr);
utterance.push({
string: this._getOutputName("listItemsCount"),
count: aItemCount
});
this._addName(utterance, aAccessible, aFlags);
this._addLandmark(utterance, aAccessible);
return utterance;
}
};
this.BrailleGenerator = { // jshint ignore:line
__proto__: OutputGenerator, // jshint ignore:line
genForContext: function genForContext(aContext) {
let output = OutputGenerator.genForContext.apply(this, arguments);
let acc = aContext.accessible;
// add the static text indicating a list item; do this for both listitems or
// direct first children of listitems, because these are both common
// browsing scenarios
let addListitemIndicator = function addListitemIndicator(indicator = "*") {
output.unshift(indicator);
};
if (acc.indexInParent === 1 &&
acc.parent.role == Roles.LISTITEM &&
acc.previousSibling.role == Roles.STATICTEXT) {
if (acc.parent.parent && acc.parent.parent.DOMNode &&
acc.parent.parent.DOMNode.nodeName == "UL") {
addListitemIndicator();
} else {
addListitemIndicator(acc.previousSibling.name.trim());
}
} else if (acc.role == Roles.LISTITEM && acc.firstChild &&
acc.firstChild.role == Roles.STATICTEXT) {
if (acc.parent.DOMNode.nodeName == "UL") {
addListitemIndicator();
} else {
addListitemIndicator(acc.firstChild.name.trim());
}
}
return output;
},
objectOutputFunctions: {
__proto__: OutputGenerator.objectOutputFunctions, // jshint ignore:line
defaultFunc: function defaultFunc() {
return this.objectOutputFunctions._generateBaseOutput.apply(
this, arguments);
},
listitem: function listitem(aAccessible, aRoleStr, aState, aFlags) {
let braille = [];
this._addName(braille, aAccessible, aFlags);
this._addLandmark(braille, aAccessible);
return braille;
},
cell: function cell(aAccessible, aRoleStr, aState, aFlags, aContext) {
let braille = [];
let cell = aContext.getCellInfo(aAccessible);
if (cell) {
let addHeaders = function addHeaders(aBraille, aHeaders) {
if (aHeaders.length > 0) {
aBraille.push.apply(aBraille, aHeaders);
}
};
braille.push({
string: this._getOutputName("cellInfo"),
args: [cell.columnIndex + 1, cell.rowIndex + 1]
});
addHeaders(braille, cell.columnHeaders);
addHeaders(braille, cell.rowHeaders);
}
this._addName(braille, aAccessible, aFlags);
this._addLandmark(braille, aAccessible);
return braille;
},
columnheader: function columnheader() {
return this.objectOutputFunctions.cell.apply(this, arguments);
},
rowheader: function rowheader() {
return this.objectOutputFunctions.cell.apply(this, arguments);
},
statictext: function statictext(aAccessible) {
// Since we customize the list bullet's output, we add the static
// text from the first node in each listitem, so skip it here.
if (Utils.isListItemDecorator(aAccessible)) {
return [];
}
return this.objectOutputFunctions._useStateNotRole.apply(this, arguments);
},
_useStateNotRole:
function _useStateNotRole(aAccessible, aRoleStr, aState, aFlags) {
let braille = [];
this._addState(braille, aState, aRoleStr);
this._addName(braille, aAccessible, aFlags);
this._addLandmark(braille, aAccessible);
return braille;
},
switch: function braille_generator_object_output_functions_switch() {
return this.objectOutputFunctions._useStateNotRole.apply(this, arguments);
},
checkbutton: function checkbutton() {
return this.objectOutputFunctions._useStateNotRole.apply(this, arguments);
},
radiobutton: function radiobutton() {
return this.objectOutputFunctions._useStateNotRole.apply(this, arguments);
},
togglebutton: function togglebutton() {
return this.objectOutputFunctions._useStateNotRole.apply(this, arguments);
}
},
_getContextStart: function _getContextStart(aContext) {
if (aContext.accessible.parent.role == Roles.LINK) {
return [aContext.accessible.parent];
}
return [];
},
_getOutputName: function _getOutputName(aName) {
return OutputGenerator._getOutputName(aName) + "Abbr";
},
_addRole: function _addRole(aBraille, aAccessible, aRoleStr) {
if (this.mathmlRolesSet.has(aAccessible.role)) {
this._addMathRoles(aBraille, aAccessible, aRoleStr);
} else {
aBraille.push({string: this._getOutputName(aRoleStr)});
}
},
_addState: function _addState(aBraille, aState, aRoleStr) {
if (aState.contains(States.CHECKABLE)) {
aBraille.push({
string: aState.contains(States.CHECKED) ?
this._getOutputName("stateChecked") :
this._getOutputName("stateUnchecked")
});
}
if (aRoleStr === "toggle button") {
aBraille.push({
string: aState.contains(States.PRESSED) ?
this._getOutputName("statePressed") :
this._getOutputName("stateUnpressed")
});
}
}
};
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