Windows: Update installer

windows/installer.nsi

@@ -184,6 +184,9 @@ notRunning:
   SetOutPath "$INSTDIR\sqldrivers"
   File "${QT_PLUGINS_DIR}\sqldrivers\qsqlite.dll"
 
+  SetOutPath "$INSTDIR\styles"
+  File "${QT_PLUGINS_DIR}\styles\*.dll"
+
   SetOutPath "$INSTDIR\translations\qtwebengine_locales"
   File "${QT_DIR}\translations\qtwebengine_locales\*"
 
@@ -317,8 +320,48 @@ SectionEnd
     notRunning:
       SetShellVarContext all
       Delete "$DESKTOP\Falkon.lnk"
-      RMDir /r "$INSTDIR"
-      RMDir /r "$SMPROGRAMS\Falkon"
+
+      Delete "$INSTDIR\falkon.exe"
+      Delete "$INSTDIR\falkonprivate.dll"
+      Delete "$INSTDIR\uninstall.exe"
+      Delete "$INSTDIR\COPYRIGHT.txt"
+      Delete "$INSTDIR\qt.conf"
+      Delete "$INSTDIR\libeay32.dll"
+      Delete "$INSTDIR\ssleay32.dll"
+      Delete "$INSTDIR\libEGL.dll"
+      Delete "$INSTDIR\libGLESv2.dll"
+      Delete "$INSTDIR\opengl32sw.dll"
+      Delete "$INSTDIR\D3Dcompiler_47.dll"
+      Delete "$INSTDIR\QtWebEngineProcess.exe"
+
+      ; Wildcard delete to compact script of uninstall section
+      Delete "$INSTDIR\icu*.dll"
+      Delete "$INSTDIR\Qt5*.dll"
+      Delete "$INSTDIR\msvc*.dll"
+      Delete "$INSTDIR\vc*.dll"
+      Delete "$INSTDIR\concrt*.dll"
+
+      ; Recursively delete folders in root of $INSTDIR
+      RMDir /r "$INSTDIR\iconengines"
+      RMDir /r "$INSTDIR\imageformats"
+      RMDir /r "$INSTDIR\platforms"
+      RMDir /r "$INSTDIR\printsupport"
+      RMDir /r "$INSTDIR\qml"
+      RMDir /r "$INSTDIR\resources"
+      RMDir /r "$INSTDIR\translations"
+      RMDir /r "$INSTDIR\sqldrivers"
+      RMDir /r "$INSTDIR\styles"
+      RMDir /r "$INSTDIR\qtwebengine_dictionaries"
+      RMDir /r "$INSTDIR\themes"
+      RMDir /r "$INSTDIR\locale"
+      RMDir /r "$INSTDIR\plugins"
+
+      ; Remove $INSTDIR if it is empty
+      RMDir "$INSTDIR"
+
+      ; Remove start menu programs folder
+      RMDir /r "$SMPROGRAMS\${PRODUCT_NAME}"
+
       DeleteRegKey ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}"
       DeleteRegKey HKLM "${PRODUCT_DIR_REGKEY}"
 
@@ -457,3 +500,14 @@ FunctionEnd
 Function RunFalkonAsUser
     ${StdUtils.ExecShellAsUser} $0 "$INSTDIR\falkon.exe" "open" ""
 FunctionEnd
+
+Function un.onInit
+    ReadRegStr $R0 ${PRODUCT_UNINST_ROOT_KEY}  "${PRODUCT_UNINST_KEY}" "InstallLocation"
+    IfErrors +2 0
+        StrCpy $INSTDIR "$R0"
+
+    IfFileExists "$INSTDIR\falkon.exe" found
+        MessageBox MB_OK|MB_ICONSTOP "$(MSG_InvalidInstallPath)"
+        Abort
+    found:
+FunctionEnd

windows/languages.nsh

@@ -24,6 +24,7 @@ LangString DESC_SecProtocols ${LANG_ENGLISH} "Associate Falkon with http(s) and
 ;
 LangString MSG_RunningInstance ${LANG_ENGLISH} "Falkon is already running! Do you want the installer try to terminate it?"
 LangString MSG_InstallationCanceled ${LANG_ENGLISH} "Process cancelled by user."
+LangString MSG_InvalidInstallPath ${LANG_ENGLISH} "Install path invalid!"
 
 ;;;;Arabic
 LangString PRODUCT_DESC  ${LANG_ARABIC} "كَبزيلّا متصفّح للوب جديد سريع وآمن ومفتوح المصدر. يُرخَّص استخدامه وفق الإصدار الثالث من رخصة جنو العمومية (GPL) أو أي إصدار أحدث من ذلك (اختر كما تشاء). يُبنى كَبزيلّا على محرّك العرض WebKitوإطار العمل Qt."