browser_rules_add-property-and-reselect.js

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/* Any copyright is dedicated to the Public Domain.

 http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Tests that adding properties to rules work and reselecting the element still

// show them.

const TEST_URI = URL_ROOT + "doc_content_stylesheet.html";

add_task(async function () {

  await addTab(TEST_URI);

  const { inspector, view } = await openRuleView();

  await selectNode("#target", inspector);

  info("Setting a font-weight property on all rules");

  await setPropertyOnAllRules(view, inspector);

  info("Reselecting the element");

  await selectNode("body", inspector);

  await selectNode("#target", inspector);

  checkPropertyOnAllRules(view);

});

async function setPropertyOnAllRules(view, inspector) {

  // Set the inline style rule first independently because it needs to wait for specific

  // events and the DOM mutation that it causes refreshes the rules view, so we need to

  // get the list of rules again later.

  info("Adding font-weight:bold in the inline style rule");

  const inlineStyleRuleEditor = view._elementStyle.rules[0].editor;

  const onMutation = inspector.once("markupmutation");

  const onRuleViewRefreshed = view.once("ruleview-refreshed");

  inlineStyleRuleEditor.addProperty("font-weight", "bold", "", true);

  await Promise.all([onMutation, onRuleViewRefreshed]);

  // Now set the other rules after having retrieved the list.

  // We only want to do this for editable rules (e.g. not for element attributes style)

  const allRules = getAllEditableRules(view);

  is(allRules.length, 6, "We have the expected number of rules");

  for (let i = 1; i < allRules.length; i++) {

    info(`Adding font-weight:bold in rule ${i}`);

    const rule = allRules[i];

    const ruleEditor = rule.editor;

    const onRuleViewChanged = view.once("ruleview-changed");

    ruleEditor.addProperty("font-weight", "bold", "", true);

    await onRuleViewChanged;

function getAllEditableRules(view) {

  return [...view._elementStyle.rules].filter(rule => rule.editor.isEditable);

function checkPropertyOnAllRules(view) {

  const allRules = getAllEditableRules(view);

  is(allRules.length, 6, "We have the expected number of rules");

  for (const rule of allRules) {

    const lastProperty = rule.textProps.at(-1);

    is(lastProperty.name, "font-weight", "Last property name is font-weight");

    is(lastProperty.value, "bold", "Last property value is bold");