adblockplusopera: Port UI code from Chrome

options.js

Index: options.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/options.js
@@ -0,0 +1,584 @@
+var backgroundPage = opera.extension.bgProcess;
+var imports = ["FilterStorage", "FilterNotifier", "Subscription", "SpecialSubscription",
+               "DownloadableSubscription", "Filter", "WhitelistFilter",
+               "Synchronizer", "Prefs", "Utils", "require"];
+for (var i = 0; i < imports.length; i++)
+  window[imports[i]] = backgroundPage[imports[i]];
+
+// Loads options from localStorage and sets UI elements accordingly
+function loadOptions()
+{
+  // Set page title to i18n version of "Adblock Plus Options"
+  document.title = i18n.getMessage("options");
+
+  // Set links
+  $("#acceptableAdsLink").attr("href", Prefs.subscriptions_exceptionsurl);
+  $("#acceptableAdsDocs").attr("href", Prefs.documentation_link.replace(/%LINK%/g, "acceptable_ads").replace(/%LANG%/g, Utils.appLocale));
+
+  // Add event listeners
+  window.addEventListener("unload", unloadOptions, false);
+  $("#updateFilterLists").click(updateFilterLists);
+  $("#startSubscriptionSelection").click(startSubscriptionSelection);
+  $("#subscriptionSelector").change(updateSubscriptionSelection);
+  $("#addSubscription").click(addSubscription);
+  $("#acceptableAds").click(allowAcceptableAds);
+  $("#whitelistForm").submit(addWhitelistDomain);
+  $("#removeWhitelist").click(removeSelectedExcludedDomain);
+  $("#customFilterForm").submit(addTypedFilter);
+  $("#removeCustomFilter").click(removeSelectedFilters);
+  $("#rawFiltersButton").click(toggleFiltersInRawFormat);
+  $("#importRawFilters").click(importRawFiltersText);
+  FilterNotifier.addListener(onFilterChange);
+
+  // Display jQuery UI elements
+  $("#tabs").tabs();
+  $("button").button();
+  $(".refreshButton").button("option", "icons", {primary: "ui-icon-refresh"});
+  $(".addButton").button("option", "icons", {primary: "ui-icon-plus"});
+  $(".removeButton").button("option", "icons", {primary: "ui-icon-minus"});
+
+  // Popuplate option checkboxes
+  initCheckbox("shouldShowIcon");
+  $("#shouldShowIcon").click(backgroundPage.refreshToolbarButton);
+
+  // Load recommended subscriptions
+  loadRecommendations();
+
+  // Show user's filters
+  reloadFilters();
+}
+$(loadOptions);
+
+// Reloads the displayed subscriptions and filters
+function reloadFilters()
+{
+  // Load user filter URLs
+  var container = document.getElementById("filterLists");
+  while (container.lastChild)
+    container.removeChild(container.lastChild);
+
+  var hasAcceptable = false;
+  for (var i = 0; i < FilterStorage.subscriptions.length; i++)
+  {
+    var subscription = FilterStorage.subscriptions[i];
+    if (subscription instanceof SpecialSubscription)
+      continue;
+
+    if (subscription.url == Prefs.subscriptions_exceptionsurl)
+    {
+      hasAcceptable = true;
+      continue;
+    }
+
+    addSubscriptionEntry(subscription);
+  }
+
+  $("#acceptableAds").prop("checked", hasAcceptable);
+
+  // User-entered filters
+  showUserFilters();
+}
+
+// Cleans up when the options window is closed
+function unloadOptions()
+{
+  FilterNotifier.removeListener(onFilterChange);
+}
+
+function initCheckbox(id)
+{
+  var checkbox = document.getElementById(id);
+  checkbox.checked = typeof localStorage[id] == "undefined" ? true : localStorage[id] == "true";
+  checkbox.addEventListener("click", function()
+  {
+    localStorage[id] = checkbox.checked;
+  }, false);
+}
+
+function showUserFilters()
+{
+  var filters = [];
+  var exceptions = [];
+  for (var i = 0; i < FilterStorage.subscriptions.length; i++)
+  {
+    var subscription = FilterStorage.subscriptions[i];
+    if (!(subscription instanceof SpecialSubscription))
+      continue;
+
+    for (var j = 0; j < subscription.filters.length; j++)
+    {
+      var filter = subscription.filters[j];
+      if (filter instanceof WhitelistFilter && /^@@\|\|([^\/:]+)\^\$document$/.test(filter.text))
+        exceptions.push(RegExp.$1)
+      else
+        filters.push(filter.text);
+    }
+  }
+
+  populateList("userFiltersBox", filters);
+  populateList("excludedDomainsBox", exceptions);
+}
+
+var delayedSubscriptionSelection = null;
+
+function loadRecommendations()
+{
+  var request = new XMLHttpRequest();
+  request.open("GET", "subscriptions.xml");
+  request.onload = function()
+  {
+    var selectedIndex = 0;
+    var selectedPrefix = null;
+    var matchCount = 0;
+
+    var list = document.getElementById("subscriptionSelector");
+    var elements = request.responseXML.documentElement.getElementsByTagName("subscription");
+    for (var i = 0; i < elements.length; i++)
+    {
+      var element = elements[i];
+      var option = document.createElement("option");
+      option.text = element.getAttribute("title") + " (" + element.getAttribute("specialization") + ")";
+      option._data = {
+        title: element.getAttribute("title"),
+        url: element.getAttribute("url"),
+        homepage: element.getAttribute("homepage")
+      };
+
+      var prefix = require("utils").Utils.checkLocalePrefixMatch(element.getAttribute("prefixes"));
+      if (prefix)
+      {
+        option.style.fontWeight = "bold";
+        option.style.backgroundColor = "#E0FFE0";
+        option.style.color = "#000000";
+        if (!selectedPrefix || selectedPrefix.length < prefix.length)
+        {
+          selectedIndex = i;
+          selectedPrefix = prefix;
+          matchCount = 1;
+        }
+        else if (selectedPrefix && selectedPrefix.length == prefix.length)
+        {
+          matchCount++;
+
+          // If multiple items have a matching prefix of the same length:
+          // Select one of the items randomly, probability should be the same
+          // for all items. So we replace the previous match here with
+          // probability 1/N (N being the number of matches).
+          if (Math.random() * matchCount < 1)
+          {
+            selectedIndex = i;
+            selectedPrefix = prefix;
+          }
+        }
+      }
+      list.appendChild(option);
+    }
+
+    var option = document.createElement("option");
+    option.text = i18n.getMessage("filters_addSubscriptionOther_label") + "\u2026";
+    option._data = null;
+    list.appendChild(option);
+
+    list.selectedIndex = selectedIndex;
+
+    if (delayedSubscriptionSelection)
+      startSubscriptionSelection.apply(null, delayedSubscriptionSelection);
+  };
+  request.send(null);
+}
+
+function startSubscriptionSelection(title, url)
+{
+  var list = document.getElementById("subscriptionSelector");
+  if (list.length == 0)
+  {
+    delayedSubscriptionSelection = [title, url];
+    return;
+  }
+
+  $('#tabs').tabs('select', 0);
+  $("#addSubscriptionContainer").show();
+  $("#addSubscriptionButton").hide();
+  $("#subscriptionSelector").focus();
+  if (typeof url != "undefined")
+  {
+    list.selectedIndex = list.length - 1;
+    document.getElementById("customSubscriptionTitle").value = title;
+    document.getElementById("customSubscriptionLocation").value = url;
+  }
+  updateSubscriptionSelection();
+  document.getElementById("addSubscriptionContainer").scrollIntoView(true);
+}
+
+function updateSubscriptionSelection()
+{
+  var list = document.getElementById("subscriptionSelector");
+  var data = list.options[list.selectedIndex]._data;
+  if (data)
+    $("#customSubscriptionContainer").hide();
+  else
+  {
+    $("#customSubscriptionContainer").show();
+    $("#customSubscriptionTitle").focus();
+  }
+}
+
+function addSubscription()
+{
+  var list = document.getElementById("subscriptionSelector");
+  var data = list.options[list.selectedIndex]._data;
+  if (data)
+    doAddSubscription(data.url, data.title, data.homepage);
+  else
+  {
+    var url = document.getElementById("customSubscriptionLocation").value.replace(/^\s+/, "").replace(/\s+$/, "");
+    if (!/^https?:/i.test(url))
+    {
+      alert(i18n.getMessage("global_subscription_invalid_location"));
+      $("#customSubscriptionLocation").focus();
+      return;
+    }
+
+    var title = document.getElementById("customSubscriptionTitle").value.replace(/^\s+/, "").replace(/\s+$/, "");
+    if (!title)
+      title = url;
+
+    doAddSubscription(url, title, null);
+  }
+
+  $("#addSubscriptionContainer").hide();
+  $("#customSubscriptionContainer").hide();
+  $("#addSubscriptionButton").show();
+}
+
+function doAddSubscription(url, title, homepage)
+{
+  if (url in FilterStorage.knownSubscriptions)
+    return;
+
+  var subscription = Subscription.fromURL(url);
+  if (!subscription)
+    return;
+
+  subscription.title = title;
+  if (homepage)
+    subscription.homepage = homepage;
+  FilterStorage.addSubscription(subscription);
+
+  if (subscription instanceof DownloadableSubscription && !subscription.lastDownload)
+    Synchronizer.execute(subscription);
+}
+
+function allowAcceptableAds(event)
+{
+  var subscription = Subscription.fromURL(Prefs.subscriptions_exceptionsurl);
+  if (!subscription)
+    return;
+
+  subscription.disabled = false;
+  subscription.title = "Allow non-intrusive advertising";
+  if ($("#acceptableAds").prop("checked"))
+  {
+    FilterStorage.addSubscription(subscription);
+    if (subscription instanceof DownloadableSubscription && !subscription.lastDownload)
+      Synchronizer.execute(subscription);
+  }
+  else
+    FilterStorage.removeSubscription(subscription);
+}
+
+function findSubscriptionElement(subscription)
+{
+  var children = document.getElementById("filterLists").childNodes;
+  for (var i = 0; i < children.length; i++)
+    if (children[i]._subscription == subscription)
+      return children[i];
+  return null;
+}
+
+function updateSubscriptionInfo(element)
+{
+  var subscription = element._subscription;
+
+  var title = element.getElementsByClassName("subscriptionTitle")[0];
+  title.textContent = subscription.title;
+  title.setAttribute("title", subscription.url);
+  if (subscription.homepage)
+    title.href = subscription.homepage;
+  else
+    title.href = subscription.url;
+
+  var enabled = element.getElementsByClassName("subscriptionEnabled")[0];
+  enabled.checked = !subscription.disabled;
+
+  var lastUpdate = element.getElementsByClassName("subscriptionUpdate")[0];
+  lastUpdate.classList.remove("error");
+  if (Synchronizer.isExecuting(subscription.url))
+    lastUpdate.textContent = i18n.getMessage("filters_subscription_lastDownload_inProgress");
+  else if (subscription.downloadStatus && subscription.downloadStatus != "synchronize_ok")
+  {
+    var map =
+    {
+      "synchronize_invalid_url": "filters_subscription_lastDownload_invalidURL",
+      "synchronize_connection_error": "filters_subscription_lastDownload_connectionError",
+      "synchronize_invalid_data": "filters_subscription_lastDownload_invalidData",
+      "synchronize_checksum_mismatch": "filters_subscription_lastDownload_checksumMismatch"
+    };
+    if (subscription.downloadStatus in map)
+      lastUpdate.textContent = i18n.getMessage(map[subscription.downloadStatus]);
+    else
+      lastUpdate.textContent = subscription.downloadStatus;
+    lastUpdate.classList.add("error");
+  }
+  else if (subscription.lastDownload > 0)
+  {
+    var timeDate = i18n_timeDateStrings(subscription.lastDownload * 1000);
+    var messageID = (timeDate[1] ? "last_updated_at" : "last_updated_at_today");
+    lastUpdate.textContent = i18n.getMessage(messageID, timeDate);
+  }
+}
+
+function onFilterChange(action, item, param1, param2)
+{
+  switch (action)
+  {
+    case "load":
+      reloadFilters();
+      break;
+    case "subscription.title":
+    case "subscription.disabled":
+    case "subscription.homepage":
+    case "subscription.lastDownload":
+    case "subscription.downloadStatus":
+      var element = findSubscriptionElement(item);
+      if (element)
+        updateSubscriptionInfo(element);
+      break;
+    case "subscription.added":
+      if (!(item instanceof SpecialSubscription) && !findSubscriptionElement(item))
+      {
+        if (item.url == Prefs.subscriptions_exceptionsurl)
+          $("#acceptableAds").prop("checked", true);
+        else
+          addSubscriptionEntry(item);
+      }
+      break;
+    case "subscription.removed":
+      if (item.url == Prefs.subscriptions_exceptionsurl)
+        $("#acceptableAds").prop("checked", false);
+      else
+      {
+        var element = findSubscriptionElement(item);
+        if (element)
+          element.parentNode.removeChild(element);
+      }
+      break;
+    case "filter.added":
+      if (item instanceof WhitelistFilter && /^@@\|\|([^\/:]+)\^\$document$/.test(item.text))
+        appendToListBox("excludedDomainsBox", RegExp.$1);
+      else
+        appendToListBox("userFiltersBox", item.text);
+      break;
+    case "filter.removed":
+      if (item instanceof WhitelistFilter && /^@@\|\|([^\/:]+)\^\$document$/.test(item.text))
+        removeFromListBox("excludedDomainsBox", RegExp.$1);
+      else
+        removeFromListBox("userFiltersBox", item.text);
+      break;
+  }
+}
+
+// Populates a list box with a number of entries
+function populateList(id, entries)
+{
+  var list = document.getElementById(id);
+  while (list.lastChild)
+    list.removeChild(list.lastChild);
+
+  entries.sort();
+  for (var i = 0; i < entries.length; i++)
+  {
+    var option = document.createElement("option");
+    option.text = entries[i];
+    option.value = entries[i];
+    list.appendChild(option);
+  }
+}
+
+// Add a filter string to the list box.
+function appendToListBox(boxId, text)
+{
+  var elt = document.createElement("option");
+  elt.text = text;
+  elt.value = text;
+  document.getElementById(boxId).appendChild(elt);
+}
+
+// Remove a filter string from a list box.
+function removeFromListBox(boxId, text)
+{
+  var elt = document.createElement("option");
+  elt.text = text;
+  elt.value = text;
+  var list = document.getElementById(boxId);
+  for (var i = 0; i < list.length; i++)
+    if (list.options[i].value == text)
+      list.remove(i--);
+}
+
+function addWhitelistDomain(event)
+{
+  event.preventDefault();
+
+  var domain = document.getElementById("newWhitelistDomain").value.replace(/\s/g, "");
+  document.getElementById("newWhitelistDomain").value = "";
+  if (!domain)
+    return;
+
+  var filterText = "@@||" + domain + "^$document";
+  FilterStorage.addFilter(Filter.fromText(filterText));
+}
+
+// Adds filter text that user typed to the selection box
+function addTypedFilter(event)
+{
+  event.preventDefault();
+
+  var filterText = Filter.normalize(document.getElementById("newFilter").value);
+  document.getElementById("newFilter").value = "";
+  if (!filterText)
+    return;
+
+  FilterStorage.addFilter(Filter.fromText(filterText));
+}
+
+// Removes currently selected whitelisted domains
+function removeSelectedExcludedDomain()
+{
+  var excludedDomainsBox = document.getElementById("excludedDomainsBox");
+  var remove = [];
+  for (var i = 0; i < excludedDomainsBox.length; i++)
+    if (excludedDomainsBox.options[i].selected)
+      remove.push(excludedDomainsBox.options[i].value);
+  if (!remove.length)
+    return;
+
+  for (var i = 0; i < remove.length; i++)
+    FilterStorage.removeFilter(Filter.fromText("@@||" + remove[i] + "^$document"));
+}
+
+// Removes all currently selected filters
+function removeSelectedFilters()
+{
+  var userFiltersBox = document.getElementById("userFiltersBox");
+  var remove = [];
+  for (var i = 0; i < userFiltersBox.length; i++)
+    if (userFiltersBox.options[i].selected)
+      remove.push(userFiltersBox.options[i].value);
+  if (!remove.length)
+    return;
+
+  for (var i = 0; i < remove.length; i++)
+    FilterStorage.removeFilter(Filter.fromText(remove[i]));
+}
+
+// Shows raw filters box and fills it with the current user filters
+function toggleFiltersInRawFormat(event)
+{
+  event.preventDefault();
+
+  $("#rawFilters").toggle();
+  if ($("#rawFilters").is(":visible"))
+  {
+    var userFiltersBox = document.getElementById("userFiltersBox");
+    var text = "";
+    for (var i = 0; i < userFiltersBox.length; i++)
+      text += userFiltersBox.options[i].value + "\n";
+    document.getElementById("rawFiltersText").value = text;
+  }
+}
+
+// Imports filters in the raw text box
+function importRawFiltersText()
+{
+  $("#rawFilters").hide();
+  var filters = document.getElementById("rawFiltersText").value.split("\n");
+  var seenFilter = {__proto__: null};
+  for (var i = 0; i < filters.length; i++)
+  {
+    var text = Filter.normalize(filters[i]);
+    if (!text)
+      continue;
+
+    // Don't import filter list header
+    if (/^\[/.test(text))
+      continue;
+
+    FilterStorage.addFilter(Filter.fromText(text));
+    seenFilter[text] = true;
+  }
+
+  var remove = [];
+  for (var i = 0; i < FilterStorage.subscriptions.length; i++)
+  {
+    var subscription = FilterStorage.subscriptions[i];
+    if (!(subscription instanceof SpecialSubscription))
+      continue;
+
+    for (var j = 0; j < subscription.filters.length; j++)
+    {
+      var filter = subscription.filters[j];
+      if (filter instanceof WhitelistFilter && /^@@\|\|([^\/:]+)\^\$document$/.test(filter.text))
+        continue;
+
+      if (!(filter.text in seenFilter))
+        remove.push(filter);
+    }
+  }
+  for (var i = 0; i < remove.length; i++)
+    FilterStorage.removeFilter(remove[i]);
+}
+
+// Called when user explicitly requests filter list updates
+function updateFilterLists()
+{
+  for (var i = 0; i < FilterStorage.subscriptions.length; i++)
+  {
+    var subscription = FilterStorage.subscriptions[i];
+    if (subscription instanceof DownloadableSubscription)
+      Synchronizer.execute(subscription, true, true);
+  }
+}
+
+// Adds a subscription entry to the UI.
+function addSubscriptionEntry(subscription)
+{
+  var template = document.getElementById("subscriptionTemplate");
+  var element = template.cloneNode(true);
+  element.removeAttribute("id");
+  element._subscription = subscription;
+
+  var removeButton = element.getElementsByClassName("subscriptionRemoveButton")[0];
+  removeButton.setAttribute("title", removeButton.textContent);
+  removeButton.textContent = "\xD7";
+  removeButton.addEventListener("click", function()
+  {
+    if (!confirm(i18n.getMessage("global_remove_subscription_warning")))
+      return;
+
+    FilterStorage.removeSubscription(subscription);
+  }, false);
+
+  var enabled = element.getElementsByClassName("subscriptionEnabled")[0];
+  enabled.addEventListener("click", function()
+  {
+    if (subscription.disabled == !enabled.checked)
+      return;
+
+    subscription.disabled = !enabled.checked;
+  }, false);
+
+  updateSubscriptionInfo(element);
+
+  document.getElementById("filterLists").appendChild(element);
+}