1 files changed, 406 insertions, 0 deletions
diff --git a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js
new file mode 100644
index 0000000000..0f0e23d81c
--- /dev/null
+++ b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js
@@ -0,0 +1,406 @@
+/* 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/. */
+
+/* eslint-env mozilla/remote-page */
+
+/**
+ * Determines whether a given value is a fluent id or plain text and adds it to an element
+ * @param {Array<[HTMLElement, string]>} items An array of [element, value] where value is
+ *                                       a fluent id starting with "fluent:" or plain text
+ */
+function translateElements(items) {
+  items.forEach(([element, value]) => {
+    // Skip empty text or elements
+    if (!element || !value) {
+      return;
+    }
+    const fluentId = value.replace(/^fluent:/, "");
+    if (fluentId !== value) {
+      document.l10n.setAttributes(element, fluentId);
+    } else {
+      element.textContent = value;
+      element.removeAttribute("data-l10n-id");
+    }
+  });
+}
+
+function renderInfo({
+  infoEnabled,
+  infoTitle,
+  infoTitleEnabled,
+  infoBody,
+  infoLinkText,
+  infoLinkUrl,
+  infoIcon,
+} = {}) {
+  const container = document.querySelector(".info");
+  if (infoEnabled === false) {
+    container.hidden = true;
+    return;
+  }
+  container.hidden = false;
+
+  const titleEl = document.getElementById("info-title");
+  const bodyEl = document.getElementById("info-body");
+  const linkEl = document.getElementById("private-browsing-myths");
+
+  let feltPrivacyEnabled = RPMGetBoolPref(
+    "browser.privatebrowsing.felt-privacy-v1",
+    false
+  );
+
+  if (infoIcon && !feltPrivacyEnabled) {
+    container.style.backgroundImage = `url(${infoIcon})`;
+  }
+
+  if (feltPrivacyEnabled) {
+    // Record exposure event for Felt Privacy experiment
+    window.FeltPrivacyExposureTelemetry();
+
+    infoTitleEnabled = true;
+    infoTitle = "fluent:about-private-browsing-felt-privacy-v1-info-header";
+    infoBody = "fluent:about-private-browsing-felt-privacy-v1-info-body";
+    infoLinkText = "fluent:about-private-browsing-felt-privacy-v1-info-link";
+  }
+
+  titleEl.hidden = !infoTitleEnabled;
+
+  translateElements([
+    [titleEl, infoTitle],
+    [bodyEl, infoBody],
+    [linkEl, infoLinkText],
+  ]);
+
+  if (infoLinkUrl) {
+    linkEl.setAttribute("href", infoLinkUrl);
+  }
+}
+
+async function renderPromo({
+  messageId = null,
+  promoEnabled = false,
+  promoType = "VPN",
+  promoTitle,
+  promoTitleEnabled,
+  promoLinkText,
+  promoLinkType,
+  promoSectionStyle,
+  promoHeader,
+  promoImageLarge,
+  promoImageSmall,
+  promoButton = null,
+} = {}) {
+  const shouldShow = await RPMSendQuery("ShouldShowPromo", { type: promoType });
+  const container = document.querySelector(".promo");
+
+  if (!promoEnabled || !shouldShow) {
+    container.remove();
+    return false;
+  }
+
+  const titleEl = document.getElementById("private-browsing-promo-text");
+  const linkEl = document.getElementById("private-browsing-promo-link");
+  const promoHeaderEl = document.getElementById("promo-header");
+  const infoContainerEl = document.querySelector(".info");
+  const promoImageLargeEl = document.querySelector(".promo-image-large img");
+  const promoImageSmallEl = document.querySelector(".promo-image-small img");
+  const dismissBtn = document.querySelector("#dismiss-btn");
+
+  if (promoLinkType === "link") {
+    linkEl.classList.remove("primary");
+    linkEl.classList.add("text-link", "promo-link");
+  }
+
+  if (promoButton?.action) {
+    linkEl.addEventListener("click", async event => {
+      event.preventDefault();
+
+      // Record promo click telemetry and set metrics as allow for spotlight
+      // modal opened on promo click if user is enrolled in an experiment
+      let isExperiment = window.PrivateBrowsingRecordClick("promo_link");
+      const promoButtonData = promoButton?.action?.data;
+      if (
+        promoButton?.action?.type === "SHOW_SPOTLIGHT" &&
+        promoButtonData?.content
+      ) {
+        promoButtonData.content.metrics = isExperiment ? "allow" : "block";
+      }
+
+      await RPMSendQuery("SpecialMessageActionDispatch", promoButton.action);
+    });
+  } else {
+    // If the action doesn't exist, remove the promo completely
+    container.remove();
+    return false;
+  }
+
+  const onDismissBtnClick = () => {
+    window.ASRouterMessage({
+      type: "BLOCK_MESSAGE_BY_ID",
+      data: { id: messageId },
+    });
+    window.PrivateBrowsingRecordClick("dismiss_button");
+    container.remove();
+  };
+
+  if (dismissBtn && messageId) {
+    dismissBtn.addEventListener("click", onDismissBtnClick, { once: true });
+  }
+
+  if (promoSectionStyle) {
+    container.classList.add(promoSectionStyle);
+
+    switch (promoSectionStyle) {
+      case "below-search":
+        container.remove();
+        infoContainerEl?.insertAdjacentElement("beforebegin", container);
+        break;
+      case "top":
+        container.remove();
+        document.body.insertAdjacentElement("afterbegin", container);
+    }
+  }
+
+  if (promoImageLarge) {
+    promoImageLargeEl.src = promoImageLarge;
+  } else {
+    promoImageLargeEl.parentNode.remove();
+  }
+
+  if (promoImageSmall) {
+    promoImageSmallEl.src = promoImageSmall;
+  } else {
+    promoImageSmallEl.parentNode.remove();
+  }
+
+  if (!promoTitleEnabled) {
+    titleEl.remove();
+  }
+
+  if (!promoHeader) {
+    promoHeaderEl.remove();
+  }
+
+  translateElements([
+    [titleEl, promoTitle],
+    [linkEl, promoLinkText],
+    [promoHeaderEl, promoHeader],
+  ]);
+
+  // Only make promo section visible after adding content
+  // and translations to prevent layout shifting in page
+  container.classList.add("promo-visible");
+  return true;
+}
+
+/**
+ * For every PB newtab loaded, a second is pre-rendered in the background.
+ * We need to guard against invalid impressions by checking visibility state.
+ * If visible, record. Otherwise, listen for visibility change and record later.
+ */
+function recordOnceVisible(message) {
+  const recordImpression = () => {
+    if (document.visibilityState === "visible") {
+      window.ASRouterMessage({
+        type: "IMPRESSION",
+        data: message,
+      });
+      // Similar telemetry, but for Nimbus experiments
+      window.PrivateBrowsingPromoExposureTelemetry();
+      document.removeEventListener("visibilitychange", recordImpression);
+    }
+  };
+
+  if (document.visibilityState === "visible") {
+    window.ASRouterMessage({
+      type: "IMPRESSION",
+      data: message,
+    });
+    // Similar telemetry, but for Nimbus experiments
+    window.PrivateBrowsingPromoExposureTelemetry();
+  } else {
+    document.addEventListener("visibilitychange", recordImpression);
+  }
+}
+
+// The PB newtab may be pre-rendered. Once the tab is visible, check to make sure the message wasn't blocked after the initial render. If it was, remove the promo.
+function handlePromoOnPreload(message) {
+  async function removePromoIfBlocked() {
+    if (document.visibilityState === "visible") {
+      let blocked = await RPMSendQuery("IsPromoBlocked", message);
+      if (blocked) {
+        const container = document.querySelector(".promo");
+        container.remove();
+      }
+    }
+    document.removeEventListener("visibilitychange", removePromoIfBlocked);
+  }
+  // Only add the listener to pre-rendered tabs that aren't visible
+  if (document.visibilityState !== "visible") {
+    document.addEventListener("visibilitychange", removePromoIfBlocked);
+  }
+}
+
+async function setupMessageConfig(config = null) {
+  let message = null;
+
+  if (!config) {
+    let hideDefault = window.PrivateBrowsingShouldHideDefault();
+    try {
+      let response = await window.ASRouterMessage({
+        type: "PBNEWTAB_MESSAGE_REQUEST",
+        data: { hideDefault: !!hideDefault },
+      });
+      message = response?.message;
+      config = message?.content;
+      config.messageId = message?.id;
+    } catch (e) {}
+  }
+
+  renderInfo(config);
+  let hasRendered = await renderPromo(config);
+  if (hasRendered && message) {
+    recordOnceVisible(message);
+    handlePromoOnPreload(message);
+  }
+  // For tests
+  document.documentElement.setAttribute("PrivateBrowsingRenderComplete", true);
+}
+
+let SHOW_DEVTOOLS_MESSAGE = "ShowDevToolsMessage";
+
+function showDevToolsMessage(msg) {
+  msg.data.content.messageId = "DEVTOOLS_MESSAGE";
+  setupMessageConfig(msg?.data?.content);
+  RPMRemoveMessageListener(SHOW_DEVTOOLS_MESSAGE, showDevToolsMessage);
+}
+
+document.addEventListener("DOMContentLoaded", function () {
+  // check the url to see if we're rendering a devtools message
+  if (document.location.toString().includes("debug")) {
+    RPMAddMessageListener(SHOW_DEVTOOLS_MESSAGE, showDevToolsMessage);
+    return;
+  }
+  if (!RPMIsWindowPrivate()) {
+    document.documentElement.classList.remove("private");
+    document.documentElement.classList.add("normal");
+    document
+      .getElementById("startPrivateBrowsing")
+      .addEventListener("click", function () {
+        RPMSendAsyncMessage("OpenPrivateWindow");
+      });
+    return;
+  }
+
+  // The default info content is already in the markup, but we need to use JS to
+  // set up the learn more link, since it's dynamically generated.
+  const linkEl = document.getElementById("private-browsing-myths");
+  linkEl.setAttribute(
+    "href",
+    RPMGetFormatURLPref("app.support.baseURL") + "private-browsing-myths"
+  );
+  linkEl.addEventListener("click", () => {
+    window.PrivateBrowsingRecordClick("info_link");
+  });
+
+  // We don't do this setup until now, because we don't want to record any impressions until we're
+  // sure we're actually running a private window, not just about:privatebrowsing in a normal window.
+  setupMessageConfig();
+
+  // Set up the private search banner.
+  const privateSearchBanner = document.getElementById("search-banner");
+
+  RPMSendQuery("ShouldShowSearchBanner", {}).then(engineName => {
+    if (engineName) {
+      document.l10n.setAttributes(
+        document.getElementById("about-private-browsing-search-banner-title"),
+        "about-private-browsing-search-banner-title",
+        { engineName }
+      );
+      privateSearchBanner.removeAttribute("hidden");
+      document.body.classList.add("showBanner");
+    }
+
+    // We set this attribute so that tests know when we are done.
+    document.documentElement.setAttribute("SearchBannerInitialized", true);
+  });
+
+  function hideSearchBanner() {
+    privateSearchBanner.hidden = true;
+    document.body.classList.remove("showBanner");
+    RPMSendAsyncMessage("SearchBannerDismissed");
+  }
+
+  document
+    .getElementById("search-banner-close-button")
+    .addEventListener("click", () => {
+      hideSearchBanner();
+    });
+
+  let openSearchOptions = document.getElementById(
+    "about-private-browsing-search-banner-description"
+  );
+  let openSearchOptionsEvtHandler = evt => {
+    if (
+      evt.target.id == "open-search-options-link" &&
+      (evt.keyCode == evt.DOM_VK_RETURN || evt.type == "click")
+    ) {
+      RPMSendAsyncMessage("OpenSearchPreferences");
+      hideSearchBanner();
+    }
+  };
+  openSearchOptions.addEventListener("click", openSearchOptionsEvtHandler);
+  openSearchOptions.addEventListener("keypress", openSearchOptionsEvtHandler);
+
+  // Setup the search hand-off box.
+  let btn = document.getElementById("search-handoff-button");
+
+  let editable = document.getElementById("fake-editable");
+  let DISABLE_SEARCH_TOPIC = "DisableSearch";
+  let SHOW_SEARCH_TOPIC = "ShowSearch";
+  let SEARCH_HANDOFF_TOPIC = "SearchHandoff";
+
+  function showSearch() {
+    btn.classList.remove("focused");
+    btn.classList.remove("disabled");
+    RPMRemoveMessageListener(SHOW_SEARCH_TOPIC, showSearch);
+  }
+
+  function disableSearch() {
+    btn.classList.add("disabled");
+  }
+
+  function handoffSearch(text) {
+    RPMSendAsyncMessage(SEARCH_HANDOFF_TOPIC, { text });
+    RPMAddMessageListener(SHOW_SEARCH_TOPIC, showSearch);
+    if (text) {
+      disableSearch();
+    } else {
+      btn.classList.add("focused");
+      RPMAddMessageListener(DISABLE_SEARCH_TOPIC, disableSearch);
+    }
+  }
+  btn.addEventListener("focus", function () {
+    handoffSearch();
+  });
+  btn.addEventListener("click", function () {
+    handoffSearch();
+  });
+
+  // Hand-off any text that gets dropped or pasted
+  editable.addEventListener("drop", function (ev) {
+    ev.preventDefault();
+    let text = ev.dataTransfer.getData("text");
+    if (text) {
+      handoffSearch(text);
+    }
+  });
+  editable.addEventListener("paste", function (ev) {
+    ev.preventDefault();
+    handoffSearch(ev.clipboardData.getData("Text"));
+  });
+
+  // Load contentSearchUI so it sets the search engine icon and name for us.
+  new window.ContentSearchHandoffUIController();
+});