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[tor-commits] [tor-browser] 73/74: Bug 11698: Incorporate Tor Browser Manual pages into Tor Browser



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richard pushed a commit to branch tor-browser-102.4.0esr-12.0-2
in repository tor-browser.

commit a5d5a9962eeb95a11894f17f9a008d6c4c2f8e5a
Author: Pier Angelo Vendrame <pierov@xxxxxxxxxxxxxx>
AuthorDate: Thu May 5 20:15:01 2022 +0200

    Bug 11698: Incorporate Tor Browser Manual pages into Tor Browser
    
    This patch associates the about:manual page to a translated page that
    must be injected to browser/omni.ja after the build.
    The content must be placed in chrome/browser/content/browser/manual/, so
    that is then available at chrome://browser/content/manual/.
    We preferred giving absolute freedom to the web team, rather than having
    to change the patch in case of changes on the documentation.
---
 browser/components/about/AboutRedirector.cpp | 64 ++++++++++++++++++++++++++++
 browser/components/about/components.conf     |  1 +
 2 files changed, 65 insertions(+)

diff --git a/browser/components/about/AboutRedirector.cpp b/browser/components/about/AboutRedirector.cpp
index c3095c4bd3bb..05fec67c79e0 100644
--- a/browser/components/about/AboutRedirector.cpp
+++ b/browser/components/about/AboutRedirector.cpp
@@ -15,6 +15,11 @@
 #include "mozilla/StaticPrefs_browser.h"
 #include "mozilla/dom/ContentChild.h"
 
+// For Tor Browser manual
+#include "nsTHashSet.h"
+#include "mozilla/intl/LocaleService.h"
+#include "mozilla/Omnijar.h"
+
 namespace mozilla {
 namespace browser {
 
@@ -150,6 +155,11 @@ static const RedirEntry kRedirMap[] = {
          nsIAboutModule::URI_CAN_LOAD_IN_CHILD | nsIAboutModule::ALLOW_SCRIPT |
          nsIAboutModule::HIDE_FROM_ABOUTABOUT |
          nsIAboutModule::IS_SECURE_CHROME_UI},
+    // The correct URI must be obtained by GetManualChromeURI
+    {"manual", "about:blank", nsIAboutModule::URI_SAFE_FOR_UNTRUSTED_CONTENT |
+         nsIAboutModule::ALLOW_SCRIPT | nsIAboutModule::URI_MUST_LOAD_IN_CHILD |
+         nsIAboutModule::URI_CAN_LOAD_IN_PRIVILEGEDABOUT_PROCESS |
+         nsIAboutModule::IS_SECURE_CHROME_UI},
 };
 
 static nsAutoCString GetAboutModuleName(nsIURI* aURI) {
@@ -166,6 +176,52 @@ static nsAutoCString GetAboutModuleName(nsIURI* aURI) {
   return path;
 }
 
+static nsTHashSet<nsCStringHashKey> GetManualLocales()
+{
+  nsTHashSet<nsCStringHashKey> locales;
+  RefPtr<nsZipArchive> zip = Omnijar::GetReader(Omnijar::APP);
+  UniquePtr<nsZipFind> find;
+  const nsAutoCString prefix("chrome/browser/content/browser/manual/");
+  nsAutoCString needle = prefix;
+  needle.Append("*.html");
+  if (NS_SUCCEEDED(zip->FindInit(needle.get(), getter_Transfers(find)))) {
+    const char* entryName;
+    uint16_t entryNameLen;
+    while (NS_SUCCEEDED(find->FindNext(&entryName, &entryNameLen))) {
+      // 5 is to remove the final `.html`
+      const size_t length = entryNameLen - prefix.Length() - 5;
+      locales.Insert(nsAutoCString(entryName + prefix.Length(), length));
+    }
+  }
+  return locales;
+}
+
+static nsAutoCString GetManualChromeURI() {
+  static nsTHashSet<nsCStringHashKey> locales = GetManualLocales();
+
+  nsAutoCString reqLocale;
+  intl::LocaleService::GetInstance()->GetAppLocaleAsBCP47(reqLocale);
+  // Check every time the URL is needed in case the lang has been changed.
+  // We do not provide multi-language builds at the moment, so this should not
+  // happen, at least in Tor Browser desktop, but we prepared the patch to be
+  // ready also in such a case.
+  if (!locales.Contains(reqLocale) && reqLocale.Length() > 2 &&
+      reqLocale[2] == '-') {
+    // At the moment, codes in our manual output are either 2 letters (en) or
+    // 5 letters (pt-BR)
+    reqLocale.SetLength(2);
+  }
+  if (!locales.Contains(reqLocale)) {
+    reqLocale = "en";
+  }
+
+  // %s is the language
+  constexpr char model[] = "chrome://browser/content/manual/%s.html";
+  nsAutoCString url;
+  url.AppendPrintf(model, reqLocale.get());
+  return url;
+}
+
 NS_IMETHODIMP
 AboutRedirector::NewChannel(nsIURI* aURI, nsILoadInfo* aLoadInfo,
                             nsIChannel** result) {
@@ -219,6 +275,10 @@ AboutRedirector::NewChannel(nsIURI* aURI, nsILoadInfo* aLoadInfo,
         NS_ENSURE_SUCCESS(rv, rv);
       }
 
+      if (path.EqualsLiteral("manual")) {
+        url = GetManualChromeURI();
+      }
+
       // fall back to the specified url in the map
       if (url.IsEmpty()) {
         url.AssignASCII(redir.url);
@@ -277,6 +337,10 @@ AboutRedirector::GetChromeURI(nsIURI* aURI, nsIURI** chromeURI) {
 
   nsAutoCString name = GetAboutModuleName(aURI);
 
+  if (name.EqualsLiteral("manual")) {
+    return NS_NewURI(chromeURI, GetManualChromeURI());
+  }
+
   for (const auto& redir : kRedirMap) {
     if (name.Equals(redir.id)) {
       return NS_NewURI(chromeURI, redir.url);
diff --git a/browser/components/about/components.conf b/browser/components/about/components.conf
index d35ad34ec8ba..527718871468 100644
--- a/browser/components/about/components.conf
+++ b/browser/components/about/components.conf
@@ -13,6 +13,7 @@ pages = [
     'logins',
     'loginsimportreport',
     'firefoxview',
+    'manual',
     'newtab',
     'pocket-home',
     'pocket-saved',

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