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[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / text / character-set-conversion.cpp

diff --git a/dali-toolkit/internal/text/character-set-conversion.cpp b/dali-toolkit/internal/text/character-set-conversion.cpp
index 3afecbb..7402292 100644 (file)
--- a/dali-toolkit/internal/text/character-set-conversion.cpp
+++ b/dali-toolkit/internal/text/character-set-conversion.cpp
@@ -24,12 +24,17 @@ namespace Dali
 namespace Toolkit
 {
 
+namespace Text
+{
+
 namespace
 {
   const static uint8_t U1 = 1u;
   const static uint8_t U2 = 2u;
   const static uint8_t U3 = 3u;
   const static uint8_t U4 = 4u;
+  const static uint8_t U5 = 5u;
+  const static uint8_t U6 = 6u;
   const static uint8_t U0 = 0u;
   const static uint8_t UTF8_LENGTH[256] = {
     U1, U1, U1, U1, U1, U1, U1, U1, U1, U1, //
@@ -63,11 +68,22 @@ namespace
 
     U4, U4, U4, U4, U4, U4, U4, U4,         // lead byte = 1111 0xxx (U+10000 - U+1FFFFF)
 
-    U0, U0, U0, U0,                         // Non valid.
-    U0, U0, U0, U0,                         // Non valid.
+    U5, U5, U5, U5,                         // lead byte = 1111 10xx (U+200000 - U+3FFFFFF)
+
+    U6, U6,                                 // lead byte = 1111 110x (U+4000000 - U+7FFFFFFF)
+
+    U0, U0,                                 // Non valid.
   };
+
+  const uint8_t CR = 0xd;
+  const uint8_t LF = 0xa;
 } // namespace
 
+uint8_t GetUtf8Length( uint8_t utf8LeadByte )
+{
+  return UTF8_LENGTH[utf8LeadByte];
+}
+
 uint32_t GetNumberOfUtf8Characters( const uint8_t* const utf8, uint32_t length )
 {
   uint32_t numberOfCharacters = 0u;
@@ -107,6 +123,14 @@ uint32_t GetNumberOfUtf8Bytes( const uint32_t* const utf32, uint32_t numberOfCha
     {
       numberOfBytes += U4;
     }
+    else if( code < 0x4000000u )
+    {
+      numberOfBytes += U5;
+    }
+    else if( code < 0x80000000u )
+    {
+      numberOfBytes += U6;
+    }
   }
 
   return numberOfBytes;
@@ -127,8 +151,26 @@ uint32_t Utf8ToUtf32( const uint8_t* const utf8, uint32_t length, uint32_t* utf3
     {
       case U1:
       {
-        *utf32++ = leadByte;
-        begin++;
+        if( CR == leadByte )
+        {
+          // Replace CR+LF or CR by LF
+          *utf32++ = LF;
+
+          // Look ahead if the next one is a LF.
+          ++begin;
+          if( begin < end )
+          {
+            if( LF == *begin )
+            {
+              ++begin;
+            }
+          }
+        }
+        else
+        {
+          *utf32++ = leadByte;
+          begin++;
+        }
         break;
       }
 
@@ -167,6 +209,47 @@ uint32_t Utf8ToUtf32( const uint8_t* const utf8, uint32_t length, uint32_t* utf3
         code |= *begin++ & 0x3fu;
         break;
       }
+
+      case U5:
+      {
+        uint32_t& code = *utf32++;
+        code = leadByte & 0x03u;
+        begin++;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        break;
+      }
+
+      case U6:
+      {
+        uint32_t& code = *utf32++;
+        code = leadByte & 0x01u;
+        begin++;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        code <<= 6u;
+        code |= *begin++ & 0x3fu;
+        break;
+      }
+
+      case U0:    // Invalid case
+      {
+        begin++;
+        *utf32++ = 0x20;    // Use white space
+        break;
+      }
     }
   }
 
@@ -195,13 +278,30 @@ uint32_t Utf32ToUtf8( const uint32_t* const utf32, uint32_t numberOfCharacters,
     }
     else if( code < 0x10000u )
     {
-      *utf8++ = static_cast<uint8_t>(   code >> 12u )          | 0xe0u; // lead byte for 2 byte sequence
+      *utf8++ = static_cast<uint8_t>(   code >> 12u )          | 0xe0u; // lead byte for 3 byte sequence
       *utf8++ = static_cast<uint8_t>( ( code >> 6u )  & 0x3f ) | 0x80u; // continuation byte
       *utf8++ = static_cast<uint8_t>(   code          & 0x3f ) | 0x80u; // continuation byte
     }
     else if( code < 0x200000u )
     {
-      *utf8++ = static_cast<uint8_t>(   code >> 18u )          | 0xf0u; // lead byte for 2 byte sequence
+      *utf8++ = static_cast<uint8_t>(   code >> 18u )          | 0xf0u; // lead byte for 4 byte sequence
+      *utf8++ = static_cast<uint8_t>( ( code >> 12u ) & 0x3f ) | 0x80u; // continuation byte
+      *utf8++ = static_cast<uint8_t>( ( code >> 6u )  & 0x3f ) | 0x80u; // continuation byte
+      *utf8++ = static_cast<uint8_t>(   code          & 0x3f ) | 0x80u; // continuation byte
+    }
+    else if( code < 0x4000000u )
+    {
+      *utf8++ = static_cast<uint8_t>(   code >> 24u )          | 0xf8u; // lead byte for 5 byte sequence
+      *utf8++ = static_cast<uint8_t>( ( code >> 18u ) & 0x3f ) | 0x80u; // continuation byte
+      *utf8++ = static_cast<uint8_t>( ( code >> 12u ) & 0x3f ) | 0x80u; // continuation byte
+      *utf8++ = static_cast<uint8_t>( ( code >> 6u )  & 0x3f ) | 0x80u; // continuation byte
+      *utf8++ = static_cast<uint8_t>(   code          & 0x3f ) | 0x80u; // continuation byte
+    }
+    else if( code < 0x80000000u )
+    {
+      *utf8++ = static_cast<uint8_t>(   code >> 30u )          | 0xfcu; // lead byte for 6 byte sequence
+      *utf8++ = static_cast<uint8_t>( ( code >> 24u ) & 0x3f ) | 0x80u; // continuation byte
+      *utf8++ = static_cast<uint8_t>( ( code >> 18u ) & 0x3f ) | 0x80u; // continuation byte
       *utf8++ = static_cast<uint8_t>( ( code >> 12u ) & 0x3f ) | 0x80u; // continuation byte
       *utf8++ = static_cast<uint8_t>( ( code >> 6u )  & 0x3f ) | 0x80u; // continuation byte
       *utf8++ = static_cast<uint8_t>(   code          & 0x3f ) | 0x80u; // continuation byte
@@ -211,6 +311,19 @@ uint32_t Utf32ToUtf8( const uint32_t* const utf32, uint32_t numberOfCharacters,
   return utf8 - utf8Begin;
 }
 
+void Utf32ToUtf8( const uint32_t* const utf32, uint32_t numberOfCharacters, std::string& utf8 )
+{
+  utf8.clear();
+
+  uint32_t numberOfBytes = GetNumberOfUtf8Bytes( &utf32[0], numberOfCharacters );
+  utf8.resize( numberOfBytes );
+
+  // This is a bit horrible but std::string returns a (signed) char*
+  Utf32ToUtf8( utf32, numberOfCharacters, reinterpret_cast<uint8_t*>(&utf8[0]) );
+}
+
+} // namespace Text
+
 } // namespace Toolkit
 
 } // namespace Dali