fix uppercase text issue

Author: andrew2net

lib/interscript.rb

@@ -32,14 +32,35 @@ def transliterate(system_code, string)
       rules.each do |r|
         string.scan(/#{r["pattern"]}/) do |match|
           pos = Regexp.last_match.offset(0).first
-          output[offsets[0..pos].sum - 1] = r["result"]
+          result = up_case_around?(string, pos) ? r["result"].upcase : r["result"]
+          output[offsets[0..pos].sum - 1, match.size] = result
           offsets[pos] = r["result"].size - match.size + 1
         end
       end
 
-      output.split('').map do |char|
-        charmap[char] || char
+      output.split('').map.with_index do |char, i|
+        if (c = charmap[char])
+          up_case_around?(output, i) ? c.upcase : c
+        else
+          char
+        end
       end.join('')
     end
+
+    private
+
+    def up_case_around?(string, pos)
+      return false if string[pos] != string[pos].upcase
+
+      i = pos - 1
+      i -= 1 while i.positive? && string[i] !~ /[[:alpha:]]/
+      before = string[i].to_s.strip
+
+      i = pos + 1
+      i += 1 while i < string.size - 1 && string[i] !~ /[[:alpha:]]/
+      after = string[i].to_s.strip
+
+      !before.empty? && before == before.upcase || !after.empty? && after == after.upcase
+    end
   end
 end

maps/bgnpcgn-rus-Cyrl-Latn-1947.yaml

@@ -105,7 +105,7 @@ tests:
       Vybory deputatov Gosudarstvennoy Dumy Federal’nogo Sobraniya Rossiyskoy Federatsii sed’mogo sozyva
       Data golosovaniya: 18.09.2016
 
-      Naimenovaniye Izbiratel’noy komissii:    TsIK Rossii
+      Naimenovaniye Izbiratel’noy komissii:    TSIK Rossii
 
       Svodnaya tablitsa rezul’tatov vyborov po federal’nomu izbiratel’nomu okrugu
 
@@ -128,20 +128,20 @@ tests:
       Chislo utrachennykh otkrepitel’nykh udostovereniy
       Chislo utrachennykh izbiratel’nykh byulleteney
       Chislo izbiratel’nykh byulleteney, ne uchtennykh pri poluchenii
-      1. VSEROSSIYSKAYa POLITIChESKAYa PARTIYa "RODINA"
-      2. Politicheskaya partiya KOMMUNISTIChESKAYa PARTIYa KOMMUNISTY ROSSII
+      1. VSEROSSIYSKAYA POLITICHESKAYA PARTIYA "RODINA"
+      2. Politicheskaya partiya KOMMUNISTICHESKAYA PARTIYA KOMMUNISTY ROSSII
       3. Politicheskaya partiya "Rossiyskaya partiya pensionerov za spravedlivost’"
-      4. Vserossiyskaya politicheskaya partiya "YEDINAYa ROSSIYa"
+      4. Vserossiyskaya politicheskaya partiya "YEDINAYA ROSSIYA"
       5. Politicheskaya partiya "Rossiyskaya ekologicheskaya partiya "Zelenyye"
       6. Politicheskaya partiya "Grazhdanskaya Platforma"
       7. Politicheskaya partiya LDPR - Liberal’no-demokraticheskaya partiya Rossii
       8. Politicheskaya partiya "Partiya narodnoy svobody" (PARNAS)
-      9. Vserossiyskaya politicheskaya partiya "PARTIYa ROSTA"
+      9. Vserossiyskaya politicheskaya partiya "PARTIYA ROSTA"
       10. Obshchestvennaya organizatsiya Vserossiyskaya politicheskaya partiya "Grazhdanskaya Sila"
-      11. Politicheskaya partiya "Rossiyskaya ob"yedinennaya demokraticheskaya partiya "YaBLOKO"
-      12. Politicheskaya partiya "KOMMUNISTIChESKAYa PARTIYa ROSSIYSKOY FEDERATsII"
+      11. Politicheskaya partiya "Rossiyskaya ob"yedinennaya demokraticheskaya partiya "YABLOKO"
+      12. Politicheskaya partiya "KOMMUNISTICHESKAYA PARTIYA ROSSIYSKOY FEDERATSII"
       13. Politicheskaya partiya "PATRIOTY ROSSII"
-      14. Politicheskaya partiya SPRAVEDLIVAYa ROSSIYa
+      14. Politicheskaya partiya SPRAVEDLIVAYA ROSSIYA
 
       Dannyye okruzhnykh izbiratel’nykh komissiy o chisle otkrepitel’nykh udostovereniy