tdf#36019: Dynamically enable/disable extension installation via GUI

Now extension installation via the Extension Manager dialog can be
dynamically enabled/disabled from the expert configurations.

This also affects the installation by double-clicking the extension
file in the file manager, but doesn't affect the unopkg commands.

Change-Id: I70c2c83c2458115b366c7fdcc06f72e11df4726b
Reviewed-on: https://gerrit.libreoffice.org/36688Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Muhammet Kara <muhammet.kara@pardus.org.tr>

desktop/Library_deploymentgui.mk

@@ -20,6 +20,8 @@ $(eval $(call gb_Library_use_external,deploymentgui,boost_headers))
 
 $(eval $(call gb_Library_set_precompiled_header,deploymentgui,$(SRCDIR)/desktop/inc/pch/precompiled_deploymentgui))
 
+$(eval $(call gb_Library_use_custom_headers,deploymentgui,\ officecfg/registry \ ))
+
 $(eval $(call gb_Library_use_sdk_api,deploymentgui))
 
 $(eval $(call gb_Library_use_libraries,deploymentgui,\

desktop/inc/dp_gui.hrc

@@ -30,6 +30,7 @@
 #define RID_STR_WARNING_VERSION_GREATER                           (RID_DEPLOYMENT_GUI_START + 7)
 #define RID_STR_WARNINGBOX_VERSION_GREATER_DIFFERENT_NAMES        (RID_DEPLOYMENT_GUI_START + 8)
 #define RID_STR_WARNING_INSTALL_EXTENSION                         (RID_DEPLOYMENT_GUI_START + 9)
+#define RID_STR_WARNING_INSTALL_EXTENSION_DISABLED                (RID_DEPLOYMENT_GUI_START + 10)
 
 #define RID_DLG_UPDATE_NONE                 (RID_DEPLOYMENT_GUI_START + 13)
 #define RID_DLG_UPDATE_NOINSTALLABLE        (RID_DEPLOYMENT_GUI_START + 14)

desktop/source/deployment/gui/dp_gui_dialog.src

@@ -113,6 +113,12 @@ String RID_STR_WARNING_INSTALL_EXTENSION
     "Click 'Cancel' to stop the installation.";
 };
 
+String RID_STR_WARNING_INSTALL_EXTENSION_DISABLED
+{
+    Text [en-US] = "Extension installation is currently disabled. "
+    "Please consult your system administrator for more information.";
+};
+
 String RID_STR_WARNING_REMOVE_EXTENSION
 {
     Text [en-US] = "You are about to remove the extension '%NAME'.\n"

desktop/source/deployment/gui/dp_gui_dialog2.cxx

@@ -71,6 +71,8 @@
 #include <com/sun/star/uno/Any.hxx>
 #include <com/sun/star/uno/XComponentContext.hpp>
 
+#include <officecfg/Office/ExtensionManager.hxx>
+
 #include <map>
 #include <memory>
 #include <vector>
@@ -419,6 +421,17 @@ void DialogHelper::openWebBrowser( const OUString & sURL, const OUString &sTitle
 bool DialogHelper::installExtensionWarn( const OUString &rExtensionName ) const
 {
     const SolarMutexGuard guard;
+
+    // Check if extension installation is disabled in the expert configurations
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        ScopedVclPtrInstance<MessageDialog> aWarn(m_pVCLWindow, getResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED),
+                                                  VclMessageType::Warning, VclButtonsType::Ok);
+        aWarn->Execute();
+
+        return false;
+    }
+
     ScopedVclPtrInstance<MessageDialog> aInfo(m_pVCLWindow, getResId(RID_STR_WARNING_INSTALL_EXTENSION),
                                               VclMessageType::Warning, VclButtonsType::OkCancel);
 
@@ -511,6 +524,12 @@ ExtMgrDialog::ExtMgrDialog(vcl::Window *pParent, TheExtensionManager *pManager,
     m_pUpdateBtn->Hide();
 #endif
 
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        m_pAddBtn->Disable();
+        m_pAddBtn->SetQuickHelpText(getResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED));
+    }
+
     m_aIdle.SetPriority(TaskPriority::LOWEST);
     m_aIdle.SetInvokeHandler( LINK( this, ExtMgrDialog, TimeOutHdl ) );
 }
@@ -804,7 +823,16 @@ IMPL_LINK( ExtMgrDialog, startProgress, void*, _bLockInterface, void )
     }
 
     m_pCancelBtn->Enable( bLockInterface );
-    m_pAddBtn->Enable( !bLockInterface );
+    m_pAddBtn->Enable( !bLockInterface && !officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get());
+    if (officecfg::Office::ExtensionManager::ExtensionSecurity::DisableExtensionInstallation::get())
+    {
+        m_pAddBtn->SetQuickHelpText(getResId(RID_STR_WARNING_INSTALL_EXTENSION_DISABLED));
+    }
+    else
+    {
+        m_pAddBtn->SetQuickHelpText("");
+    }
+
     m_pUpdateBtn->Enable( !bLockInterface && m_pExtensionBox->getItemCount() );
     m_pExtensionBox->enableButtons( !bLockInterface );
 

officecfg/registry/schema/org/openoffice/Office/ExtensionManager.xcs

@@ -47,6 +47,18 @@
         <value/>
       </prop>
     </group>
+    <group oor:name="ExtensionSecurity">
+      <info>
+        <desc>Holds settings related to Extension security.</desc>
+      </info>
+      <prop oor:name="DisableExtensionInstallation" oor:type="xs:boolean" oor:nillable="false">
+        <info>
+          <desc>Specifies whether to disable extension installation via the Extension Manager dialog.</desc>
+          <label>Disable Extension Installation</label>
+        </info>
+        <value>false</value>
+      </prop>
+    </group>
     <group oor:name="ExtensionUpdateData">
       <info>
         <desc>Contains information about available or ignored updates for extensions."</desc>