accessibility.js

/* 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/. */

"use strict";

const protocol = require("resource://devtools/shared/protocol.js");
const { Arg, generateActorSpec, RetVal, types } = protocol;

types.addActorType("accessible");

/**
 * Accessible with children listed in the ancestry structure calculated by the
 * walker.
 */
types.addDictType("accessibleWithChildren", {
  // Accessible
  accessible: "accessible",
  // Accessible's children
  children: "array:accessible",
});

/**
 * Data passed via "audit-event" to the client. It may include type, a list of
 * ancestries for accessible actors that have failing accessibility checks or
 * a progress information.
 */
types.addDictType("auditEventData", {
  type: "string",
  // List of ancestries (array:accessibleWithChildren)
  ancestries: "nullable:array:array:accessibleWithChildren",
  // Audit progress information
  progress: "nullable:json",
});

/**
 * Accessible relation object described by its type that also includes relation targets.
 */
types.addDictType("accessibleRelation", {
  // Accessible relation type
  type: "string",
  // Accessible relation's targets
  targets: "array:accessible",
});

const accessibleSpec = generateActorSpec({
  typeName: "accessible",

  events: {
    "actions-change": {
      type: "actionsChange",
      actions: Arg(0, "array:string"),
    },
    "name-change": {
      type: "nameChange",
      name: Arg(0, "string"),
      parent: Arg(1, "nullable:accessible"),
    },
    "value-change": {
      type: "valueChange",
      value: Arg(0, "string"),
    },
    "description-change": {
      type: "descriptionChange",
      description: Arg(0, "string"),
    },
    "states-change": {
      type: "statesChange",
      states: Arg(0, "array:string"),
    },
    "attributes-change": {
      type: "attributesChange",
      attributes: Arg(0, "json"),
    },
    "shortcut-change": {
      type: "shortcutChange",
      shortcut: Arg(0, "string"),
    },
    reorder: {
      type: "reorder",
      childCount: Arg(0, "number"),
    },
    "text-change": {
      type: "textChange",
    },
    "index-in-parent-change": {
      type: "indexInParentChange",
      indexInParent: Arg(0, "number"),
    },
    audited: {
      type: "audited",
      audit: Arg(0, "nullable:json"),
    },
  },

  methods: {
    audit: {
      request: { options: Arg(0, "nullable:json") },
      response: {
        audit: RetVal("nullable:json"),
      },
    },
    children: {
      request: {},
      response: {
        children: RetVal("array:accessible"),
      },
    },
    getRelations: {
      request: {},
      response: {
        relations: RetVal("array:accessibleRelation"),
      },
    },
    hydrate: {
      request: {},
      response: {
        properties: RetVal("json"),
      },
    },
    snapshot: {
      request: {},
      response: {
        snapshot: RetVal("json"),
      },
    },
  },
});

const accessibleWalkerSpec = generateActorSpec({
  typeName: "accessiblewalker",

  events: {
    "document-ready": {
      type: "documentReady",
    },
    "picker-accessible-picked": {
      type: "pickerAccessiblePicked",
      accessible: Arg(0, "nullable:accessible"),
    },
    "picker-accessible-previewed": {
      type: "pickerAccessiblePreviewed",
      accessible: Arg(0, "nullable:accessible"),
    },
    "picker-accessible-hovered": {
      type: "pickerAccessibleHovered",
      accessible: Arg(0, "nullable:accessible"),
    },
    "picker-accessible-canceled": {
      type: "pickerAccessibleCanceled",
    },
    "highlighter-event": {
      type: "highlighter-event",
      data: Arg(0, "json"),
    },
    "audit-event": {
      type: "audit-event",
      audit: Arg(0, "auditEventData"),
    },
  },

  methods: {
    children: {
      request: {},
      response: {
        children: RetVal("array:accessible"),
      },
    },
    getAccessibleFor: {
      request: { node: Arg(0, "domnode") },
      response: {
        accessible: RetVal("nullable:accessible"),
      },
    },
    getAncestry: {
      request: { accessible: Arg(0, "accessible") },
      response: {
        ancestry: RetVal("array:accessibleWithChildren"),
      },
    },
    startAudit: {
      request: { options: Arg(0, "nullable:json") },
    },
    highlightAccessible: {
      request: {
        accessible: Arg(0, "accessible"),
        options: Arg(1, "nullable:json"),
      },
      response: {
        value: RetVal("nullable:boolean"),
      },
    },
    unhighlight: {
      request: {},
    },
    pick: {},
    pickAndFocus: {},
    cancelPick: {},
    showTabbingOrder: {
      request: {
        elm: Arg(0, "domnode"),
        index: Arg(1, "number"),
      },
      response: {
        tabbingOrderInfo: RetVal("json"),
      },
    },
    hideTabbingOrder() {},
  },
});

const simulatorSpec = generateActorSpec({
  typeName: "simulator",

  methods: {
    simulate: {
      request: { options: Arg(0, "nullable:json") },
      response: {
        value: RetVal("boolean"),
      },
    },
  },
});

const accessibilitySpec = generateActorSpec({
  typeName: "accessibility",

  events: {
    init: {
      type: "init",
    },
    shutdown: {
      type: "shutdown",
    },
  },

  methods: {
    getTraits: {
      request: {},
      response: { traits: RetVal("json") },
    },
    bootstrap: {
      request: {},
      response: {
        state: RetVal("json"),
      },
    },
    getWalker: {
      request: {},
      response: {
        walker: RetVal("accessiblewalker"),
      },
    },
    getSimulator: {
      request: {},
      response: {
        simulator: RetVal("nullable:simulator"),
      },
    },
  },
});

const parentAccessibilitySpec = generateActorSpec({
  typeName: "parentaccessibility",

  events: {
    "can-be-disabled-change": {
      type: "canBeDisabledChange",
      canBeDisabled: Arg(0, "boolean"),
    },
    "can-be-enabled-change": {
      type: "canBeEnabledChange",
      canBeEnabled: Arg(0, "boolean"),
    },
  },

  methods: {
    bootstrap: {
      request: {},
      response: {
        state: RetVal("json"),
      },
    },
    enable: {
      request: {},
      response: {},
    },
    disable: {
      request: {},
      response: {},
    },
  },
});

exports.accessibleSpec = accessibleSpec;
exports.accessibleWalkerSpec = accessibleWalkerSpec;
exports.accessibilitySpec = accessibilitySpec;
exports.parentAccessibilitySpec = parentAccessibilitySpec;
exports.simulatorSpec = simulatorSpec;