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/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */
/* eslint no-unused-vars: [2, {"vars": "local", "args": "none"}] */
/* import-globals-from head.js */

"use strict";

/**
 * Helper methods for the HTMLTooltip integration tests.
 */

const HTML_NS = "http://www.w3.org/1999/xhtml";
const { editableField } = require("devtools/client/shared/inplace-editor");

/**
 * Create an inplace editor linked to a span element and click on the span to
 * to turn to edit mode.
 *
 * @param {Object} options
 *        Options passed to the InplaceEditor/editableField constructor.
 * @param {Document} doc
 *        Document where the span element will be created.
 * @param {String} textContent
 *        (optional) String that will be used as the text content of the span.
 */
const createInplaceEditorAndClick = Task.async(function* (options, doc, textContent) {
  let span = options.element = createSpan(doc);
  if (textContent) {
    span.textContent = textContent;
  }

  info("Creating an inplace-editor field");
  editableField(options);

  info("Clicking on the inplace-editor field to turn to edit mode");
  span.click();
});

/**
 * Helper to create a span in the provided document.
 *
 * @param {Document} doc
 *        Document where the span element will be created.
 * @return {Element} the created span element.
 */
function createSpan(doc) {
  info("Creating a new span element");
  let div = doc.createElementNS(HTML_NS, "div");
  let span = doc.createElementNS(HTML_NS, "span");
  span.setAttribute("tabindex", "0");
  span.style.fontSize = "11px";
  span.style.display = "inline-block";
  span.style.width = "100px";
  span.style.border = "1px solid red";
  span.style.fontFamily = "Courier New";

  div.style.height = "100%";
  div.style.position = "absolute";
  div.appendChild(span);

  let parent = doc.querySelector("window") || doc.body;
  parent.appendChild(div);
  return span;
}

/**
 * Test helper simulating a key event in an InplaceEditor and checking that the
 * autocompletion works as expected.
 *
 * @param {Array} testData
 *        - {String} key, the key to send
 *        - {String} completion, the expected value of the auto-completion
 *        - {Number} index, the index of the selected suggestion in the popup
 *        - {Number} total, the total number of suggestions in the popup
 * @param {InplaceEditor} editor
 *        The InplaceEditor instance being tested
 */
function* testCompletion([key, completion, index, total], editor) {
  info("Pressing key " + key);
  info("Expecting " + completion);

  let onVisibilityChange = null;
  let open = total > 0;
  if (editor.popup.isOpen != open) {
    onVisibilityChange = editor.popup.once(open ? "popup-opened" : "popup-closed");
  }

  let onSuggest;
  if (/(left|right|back_space|escape)/ig.test(key)) {
    info("Adding event listener for right|back_space|escape keys");
    onSuggest = once(editor.input, "keypress");
  } else {
    info("Waiting for after-suggest event on the editor");
    onSuggest = editor.once("after-suggest");
  }

  info("Synthesizing key " + key);
  EventUtils.synthesizeKey(key, {}, editor.input.defaultView);

  yield onSuggest;
  yield onVisibilityChange;
  yield waitForTick();

  info("Checking the state");
  if (completion !== null) {
    is(editor.input.value, completion, "Correct value is autocompleted");
  }
  if (total === 0) {
    ok(!(editor.popup && editor.popup.isOpen), "Popup is closed");
  } else {
    ok(editor.popup.isOpen, "Popup is open");
    is(editor.popup.getItems().length, total, "Number of suggestions match");
    is(editor.popup.selectedIndex, index, "Expected item is selected");
  }
}