chrome/renderer/resources/neterror.js

// Copyright 2013 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.

function toggleHelpBox() {
  var helpBoxOuter = document.getElementById('help-box-outer');
  helpBoxOuter.classList.toggle('hidden');
  var detailsButton = document.getElementById('details-button');
  if (helpBoxOuter.classList.contains('hidden'))
    detailsButton.innerText = detailsButton.detailsText;
  else
    detailsButton.innerText = detailsButton.hideDetailsText;
}

function diagnoseErrors() {
  var extensionId = 'idddmepepmjcgiedknnmlbadcokidhoa';
  var diagnoseFrame = document.getElementById('diagnose-frame');
  diagnoseFrame.innerHTML =
      '<iframe src="chrome-extension://' + extensionId +
      '/index.html"></iframe>';
}

// Subframes use a different layout but the same html file.  This is to make it
// easier to support platforms that load the error page via different
// mechanisms (Currently just iOS).
if (window.top.location != window.location)
  document.documentElement.setAttribute('subframe', '');

// Re-renders the error page using |strings| as the dictionary of values.
// Used by NetErrorTabHelper to update DNS error pages with probe results.
function updateForDnsProbe(strings) {
  var context = new JsEvalContext(strings);
  jstProcess(context, document.getElementById('t'));
}

// Given the classList property of an element, adds an icon class to the list
// and removes the previously-
function updateIconClass(classList, newClass) {
  var oldClass;

  if (classList.hasOwnProperty('last_icon_class')) {
    oldClass = classList['last_icon_class'];
    if (oldClass == newClass)
      return;
  }

  classList.add(newClass);
  if (oldClass !== undefined)
    classList.remove(oldClass);

  classList['last_icon_class'] = newClass;

  if (newClass == 'icon-offline') {
    document.body.classList.add('offline');
    new Runner('.interstitial-wrapper');
  }
}

// Does a search using |baseSearchUrl| and the text in the search box.
function search(baseSearchUrl) {
  var searchTextNode = document.getElementById('search-box');
  document.location = baseSearchUrl + searchTextNode.value;
  return false;
}

// Use to track clicks on elements generated by the navigation correction
// service.  If |trackingId| is negative, the element does not come from the
// correction service.
function trackClick(trackingId) {
  // This can't be done with XHRs because XHRs are cancelled on navigation
  // start, and because these are cross-site requests.
  if (trackingId >= 0 && errorPageController)
    errorPageController.trackClick(trackingId);
}

// Called when an <a> tag generated by the navigation correction service is
// clicked.  Separate function from trackClick so the resources don't have to
// be updated if new data is added to jstdata.
function linkClicked(jstdata) {
  trackClick(jstdata.trackingId);
}

// Implements button clicks.  This function is needed during the transition
// between implementing these in trunk chromium and implementing them in
// iOS.
function reloadButtonClick(url) {
  if (window.errorPageController) {
    errorPageController.reloadButtonClick();
  } else {
    location = url;
  }
}

function loadStaleButtonClick() {
  if (window.errorPageController) {
    errorPageController.loadStaleButtonClick();
  }
}

function detailsButtonClick() {
  if (window.errorPageController)
    errorPageController.detailsButtonClick();
}

var primaryControlOnLeft = true;
<if expr="is_macosx or is_ios or is_linux or is_android">
primaryControlOnLeft = false;
</if>

function onDocumentLoad() {
  var buttonsDiv = document.getElementById('buttons');
  var controlButtonDiv = document.getElementById('control-buttons');
  var reloadButton = document.getElementById('reload-button');
  var detailsButton = document.getElementById('details-button');
  var staleLoadButton = document.getElementById('stale-load-button');

  var primaryButton = reloadButton;
  var secondaryButton = staleLoadButton;

  // Sets up the proper button layout for the current platform.
  if (primaryControlOnLeft) {
    buttons.classList.add('suggested-left');
    controlButtonDiv.insertBefore(primaryButton, secondaryButton);
  } else {
    buttons.classList.add('suggested-right');
    controlButtonDiv.insertBefore(secondaryButton, primaryButton);
  }

  if (reloadButton.style.display == 'none' &&
      staleLoadButton.style.display == 'none') {
    detailsButton.classList.add('singular');
  }

  // Hide the details button if there are no details to show.
  if (loadTimeData.valueExists('summary') &&
          !loadTimeData.getValue('summary').msg) {
    detailsButton.style.display = 'none';
    document.getElementById('help-box-outer').style.display = 'block';
  }

  // Show control buttons.
  if (loadTimeData.valueExists('reloadButton') &&
          loadTimeData.getValue('reloadButton').msg ||
      loadTimeData.valueExists('staleLoadButton') &&
          loadTimeData.getValue('staleLoadButton').msg) {
    controlButtonDiv.hidden = false;
  }

  // Add a main message paragraph.
  if (loadTimeData.valueExists('primaryParagraph')) {
    var p = document.querySelector('#main-message p');
    p.innerHTML = loadTimeData.getString('primaryParagraph');
    p.hidden = false;
  }
}

document.addEventListener('DOMContentLoaded', onDocumentLoad);