request installation of langpack via packagekit

if ui is set to track the locale automatically and the current locale
has no match in installed resources but has a match in the list of
languages that libreoffice was compiled to contain

so e.g. de_AT locale shouldn't trigger the installation of anything if
langpack-de is already installed and yue_HK shouldn't trigger install
of anything cause that not supported (at time of writing) for libreoffice

put Fedora/RHEL/Ubuntu naming schemes in here.

I moved the lang code from svl to svtools so I could use the restart dialog
to prompt to restart after the langpack is installed, but packagekit's blocking
mode seems to be no longer blocking and control returns immediately which is a
change since the last time I played with this stuff, so drop the restart thing
for now. The lack of a blocking modal also makes the "run this on idle when there's
a toplevel window up and running" a bit futile, but lets keep that for now anyway.

caolanm->rene: I know you'd disable this anyway, so Debian is left out, there's
also config key Office/Common/PackageKit/EnableLangpackInstallation to disable
this too.

Change-Id: Ice731be539850338ccdd8af87839e0b4d83f01e7
Reviewed-on: https://gerrit.libreoffice.org/46856
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 128 insertions, 3 deletions

diff --git a/svtools/source/misc/langhelp.cxx b/svtools/source/misc/langhelp.cxx
index 16a3a1d8191c..47cb87e36963 100644
--- a/svtools/source/misc/langhelp.cxx
+++ b/svtools/source/misc/langhelp.cxx
@@ -7,12 +7,20 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-
+#include <comphelper/sequence.hxx>
+#include <i18nlangtag/mslangid.hxx>
+#include <officecfg/Office/Common.hxx>
+#include <officecfg/System.hxx>
+#include <org/freedesktop/PackageKit/SyncDbusSessionHelper.hpp>
+#include <rtl/ustring.hxx>
 #include <svtools/langhelp.hxx>
-
+#include <vcl/idle.hxx>
 #include <vcl/svapp.hxx>
+#include <vcl/sysdata.hxx>
 #include <vcl/settings.hxx>
-#include <rtl/ustring.hxx>
+#include <vcl/window.hxx>
+#include <config_langs.h>
+#include <config_vendor.h>
 
 void localizeWebserviceURI( OUString& rURI )
 {
@@ -33,4 +41,121 @@ void localizeWebserviceURI( OUString& rURI )
     rURI += aLang;
 }
 
+OUString getInstalledLocaleForLanguage(css::uno::Sequence<OUString> const & installed, OUString const & locale)
+{
+    if (locale.isEmpty())
+        return OUString();  // do not attempt to resolve anything
+
+    for (sal_Int32 i = 0; i != installed.getLength(); ++i) {
+        if (installed[i] == locale) {
+            return installed[i];
+        }
+    }
+    std::vector<OUString> fallbacks(LanguageTag(locale).getFallbackStrings(false));
+    for (OUString & rf : fallbacks) {
+        for (sal_Int32 i = 0; i != installed.getLength(); ++i) {
+            if (installed[i] == rf) {
+                return installed[i];
+            }
+        }
+    }
+    return OUString();
+}
+
+static std::unique_ptr<Idle> xLangpackInstaller;
+
+class InstallLangpack : public Idle
+{
+    std::vector<OUString> m_aPackages;
+public:
+    explicit InstallLangpack(const std::vector<OUString>& rPackages)
+        : Idle("install langpack")
+        , m_aPackages(rPackages)
+    {
+        SetPriority(TaskPriority::LOWEST);
+    }
+
+    virtual void Invoke() override
+    {
+        vcl::Window* pTopWindow = Application::GetActiveTopWindow();
+        if (!pTopWindow)
+            pTopWindow = Application::GetFirstTopLevelWindow();
+        if (!pTopWindow)
+        {
+            Start();
+            return;
+        }
+        try
+        {
+            using namespace org::freedesktop::PackageKit;
+            css::uno::Reference<XSyncDbusSessionHelper> xSyncDbusSessionHelper(SyncDbusSessionHelper::create(comphelper::getProcessComponentContext()));
+            const SystemEnvData* pEnvData = pTopWindow->GetSystemData();
+            sal_uInt32 nDbusId = pEnvData ? GetDbusId(*pEnvData) : 0;
+            xSyncDbusSessionHelper->InstallPackageNames(nDbusId, comphelper::containerToSequence(m_aPackages), OUString());
+        }
+        catch (const css::uno::Exception& e)
+        {
+            SAL_INFO("svl", "trying to install a LibreOffice langpack, caught " << e);
+        }
+        xLangpackInstaller.reset();
+    }
+};
+
+OUString getInstalledLocaleForSystemUILanguage(const css::uno::Sequence<OUString>& rLocaleElementNames, bool bRequestInstallIfMissing)
+{
+    OUString wantedLocale = officecfg::System::L10N::UILocale::get();
+    OUString locale = getInstalledLocaleForLanguage(rLocaleElementNames, wantedLocale);
+    if (bRequestInstallIfMissing && locale.isEmpty() && !wantedLocale.isEmpty() && !Application::IsHeadlessModeEnabled() &&
+        officecfg::Office::Common::PackageKit::EnableLangpackInstallation::get())
+    {
+        LanguageTag aWantedTag(wantedLocale);
+        if (aWantedTag.getLanguage() != "en")
+        {
+            // Get the list of langpacks that this build was configured to include
+            std::vector<OUString> aPackages;
+            OUString sAvailableLocales(WITH_LANG);
+            std::vector<OUString> aAvailable;
+            sal_Int32 nIndex = 0;
+            do
+            {
+                aAvailable.emplace_back(sAvailableLocales.getToken(0, ' ', nIndex));
+            }
+            while (nIndex >= 0);
+            // See which one matches the desired ui locale
+            OUString install = getInstalledLocaleForLanguage(comphelper::containerToSequence(aAvailable), wantedLocale);
+            if (!install.isEmpty() && install != "en-US")
+            {
+                OUString sVendor(OOO_VENDOR);
+                if (sVendor == "Red Hat, Inc." || sVendor == "The Fedora Project")
+                {
+                    // langpack is the typical Fedora/RHEL naming convention
+                    LanguageType eType = aWantedTag.getLanguageType();
+                    if (MsLangId::isSimplifiedChinese(eType))
+                        aPackages.emplace_back("libreoffice-langpack-zh-Hans");
+                    else if (MsLangId::isTraditionalChinese(eType))
+                        aPackages.emplace_back("libreoffice-langpack-zh-Hant");
+                    else
+                        aPackages.emplace_back("libreoffice-langpack-" + install);
+                }
+                //Debian would be: "The Document Foundation/Debian"
+                else if (sVendor == "The Document Foundation, Debian and Ubuntu")
+                {
+                    // l10n is the typical Debian/Ubuntu naming convention
+                    aPackages.emplace_back("libreoffice-l10n-" + install);
+                }
+            }
+            if (!aPackages.empty())
+            {
+                xLangpackInstaller.reset(new InstallLangpack(aPackages));
+                xLangpackInstaller->Start();
+            }
+        }
+    }
+    if (locale.isEmpty())
+        locale = getInstalledLocaleForLanguage(rLocaleElementNames, "en-US");
+    if (locale.isEmpty() && rLocaleElementNames.hasElements())
+        locale = rLocaleElementNames[0];
+    return locale;
+}
+
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