X-Git-Url: http://review.tizen.org/git/?p=platform%2Fcore%2Fuifw%2Fdali-toolkit.git;a=blobdiff_plain;f=dali-toolkit%2Finternal%2Ftext%2Fmulti-language-support-impl.cpp;h=c596045596baeab1ffd5cbfe081f059b8c8eb1d0;hp=e0053c8500701aa7cbe07239ddf8f76bdfe3f148;hb=1812ba73f9c6639bb9420a9126b499ec3873d672;hpb=1db0a8becea3dbdebaa942d934d91824a92434e7 diff --git a/dali-toolkit/internal/text/multi-language-support-impl.cpp b/dali-toolkit/internal/text/multi-language-support-impl.cpp index e0053c8..c596045 100644 --- a/dali-toolkit/internal/text/multi-language-support-impl.cpp +++ b/dali-toolkit/internal/text/multi-language-support-impl.cpp @@ -18,17 +18,18 @@ // CLASS HEADER #include -// INTERNAL INCLUDES +// EXTERNAL INCLUDES +#include +#include #include #include -#include -#include -#include -#include -#include +#include -// EXTERNAL INCLUDES -#include +// INTERNAL INCLUDES +#include +#include +#include +#include namespace Dali { @@ -36,6 +37,15 @@ namespace Dali namespace Toolkit { +namespace +{ +#if defined(DEBUG_ENABLED) +Debug::Filter* gLogFilter = Debug::Filter::New(Debug::Concise, true, "LOG_MULTI_LANGUAGE_SUPPORT"); +#endif + +const Dali::Toolkit::Text::Character UTF32_A = 0x0041; +} + namespace Text { @@ -116,6 +126,24 @@ Script GetScript( Length index, return script; } +/** + * @brief Whether the character is valid for all scripts. i.e. the white space. + * + * @param[in] character The character. + * + * @return @e true if the character is valid for all scripts. + */ +bool IsValidForAllScripts( Character character ) +{ + return ( TextAbstraction::IsWhiteSpace( character ) || + TextAbstraction::IsZeroWidthNonJoiner( character ) || + TextAbstraction::IsZeroWidthJoiner( character ) || + TextAbstraction::IsZeroWidthSpace( character ) || + TextAbstraction::IsLeftToRightMark( character ) || + TextAbstraction::IsRightToLeftMark( character ) || + TextAbstraction::IsThinSpace( character ) ); +} + bool ValidateFontsPerScript::FindValidFont( FontId fontId ) const { for( Vector::ConstIterator it = mValidFonts.Begin(), @@ -184,6 +212,7 @@ Text::MultilanguageSupport MultilanguageSupport::Get() } void MultilanguageSupport::SetScripts( const Vector& text, + const Vector& lineBreakInfo, Vector& scripts ) { const Length numberOfCharacters = text.Count(); @@ -194,8 +223,6 @@ void MultilanguageSupport::SetScripts( const Vector& text, return; } - // Traverse all characters and set the scripts. - // Stores the current script run. ScriptRun currentScriptRun; currentScriptRun.characterRun.characterIndex = 0u; @@ -205,35 +232,92 @@ void MultilanguageSupport::SetScripts( const Vector& text, // Reserve some space to reduce the number of reallocations. scripts.Reserve( numberOfCharacters << 2u ); - for( Length index = 0u; index < numberOfCharacters; ++index ) - { - const Character character = *( text.Begin() + index ); + // Whether the first valid script need to be set. + bool firstValidScript = true; - Script script = GetCharacterScript( character ); + // Whether the first valid script is a right to left script. + bool isParagraphRTL = false; - if( TextAbstraction::UNKNOWN == script ) + // Count the number of characters which are valid for all scripts. i.e. white spaces or '\n'. + Length numberOfAllScriptCharacters = 0u; + + // Pointers to the text and break info buffers. + const Character* textBuffer = text.Begin(); + const LineBreakInfo* breakInfoBuffer = lineBreakInfo.Begin(); + + // Traverse all characters and set the scripts. + for( Length index = 0u; index < numberOfCharacters; ++index ) + { + Character character = *( textBuffer + index ); + LineBreakInfo breakInfo = *( breakInfoBuffer + index ); + + // Some characters (like white spaces) are valid for many scripts. The rules to set a script + // for them are: + // - If they are at the begining of a paragraph they get the script of the first character with + // a defined script. If they are at the end, they get the script of the last one. + // - If they are between two scripts with the same direction, they get the script of the previous + // character with a defined script. If the two scripts have different directions, they get the + // script of the first character of the paragraph with a defined script. + + // Skip those characters valid for many scripts like white spaces or '\n'. + bool endOfText = index == numberOfCharacters; + while( !endOfText && + IsValidForAllScripts( character ) ) { - if( IsZeroWidthNonJoiner( character ) || - IsZeroWidthJoiner( character ) || - IsZeroWidthSpace( character ) || - IsLeftToRightMark( character ) || - IsRightToLeftMark( character ) || - IsThinSpace( character ) ) + // Count all these characters to be added into a script. + ++numberOfAllScriptCharacters; + + if( TextAbstraction::LINE_MUST_BREAK == breakInfo ) { - // Keep previous script if the character is a zero width joiner or a zero width non joiner. - script = currentScriptRun.script; + // The next character is a new paragraph. + // Know when there is a new paragraph is needed because if there is a white space + // between two scripts with different directions, it is added to the script with + // the same direction than the first script of the paragraph. + firstValidScript = true; + isParagraphRTL = false; } - else + + // Get the next character. + ++index; + endOfText = index == numberOfCharacters; + if( !endOfText ) { - script = TextAbstraction::LATIN; - DALI_ASSERT_DEBUG( !"MultilanguageSupport::SetScripts. Unkown script!" ); + character = *( textBuffer + index ); + breakInfo = *( breakInfoBuffer + index ); } } + if( endOfText ) + { + // Last characters of the text are 'white spaces'. + // There is nothing else to do. Just add the remaining characters to the last script after this bucle. + break; + } + + // Get the script of the character. + Script script = TextAbstraction::GetCharacterScript( character ); + + // Check if it is the first character of a paragraph. + if( firstValidScript && + ( TextAbstraction::UNKNOWN != script ) ) + { + // Sets the direction of the first valid script. + isParagraphRTL = TextAbstraction::IsRightToLeftScript( script ); + firstValidScript = false; + } + if( script != currentScriptRun.script ) { // Current run needs to be stored and a new one initialized. + if( isParagraphRTL != TextAbstraction::IsRightToLeftScript( script ) ) + { + // Current script has different direction than the first script of the paragraph. + // All the previously skipped characters need to be added to the previous script before it's stored. + currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters; + numberOfAllScriptCharacters = 0u; + } + if( 0u != currentScriptRun.characterRun.numberOfCharacters ) { // Store the script run. @@ -242,21 +326,50 @@ void MultilanguageSupport::SetScripts( const Vector& text, // Initialize the new one. currentScriptRun.characterRun.characterIndex = currentScriptRun.characterRun.characterIndex + currentScriptRun.characterRun.numberOfCharacters; - currentScriptRun.characterRun.numberOfCharacters = 0u; + currentScriptRun.characterRun.numberOfCharacters = numberOfAllScriptCharacters; // Adds the white spaces which are at the begining of the script. currentScriptRun.script = script; + numberOfAllScriptCharacters = 0u; + } + else + { + // Adds white spaces between characters. + currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters; + numberOfAllScriptCharacters = 0u; + } + + if( TextAbstraction::LINE_MUST_BREAK == breakInfo ) + { + // The next character is a new paragraph. + firstValidScript = true; + isParagraphRTL = false; } // Add one more character to the run. ++currentScriptRun.characterRun.numberOfCharacters; } + // Add remaining characters into the last script. + currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters; if( 0u != currentScriptRun.characterRun.numberOfCharacters ) { + if( TextAbstraction::UNKNOWN == currentScriptRun.script ) + { + // There are only white spaces in the last script. Set the latin script. + currentScriptRun.script = TextAbstraction::LATIN; + } + // Store the last run. scripts.PushBack( currentScriptRun ); } } +void MultilanguageSupport::ReplaceScripts( LogicalModel& model, + CharacterIndex characterIndex, + Length numberOfCharactersToRemove, + Length numberOfCharactersToInsert ) +{ +} + void MultilanguageSupport::ValidateFonts( const Vector& text, const Vector& scripts, Vector& fonts ) @@ -337,12 +450,33 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, { // Check in the valid fonts cache. ValidateFontsPerScript* validateFontsPerScript = *( validFontsPerScriptCacheBuffer + script ); + + if( NULL == validateFontsPerScript ) + { + validateFontsPerScript = new ValidateFontsPerScript(); + + mValidFontsPerScriptCache.PushBack( validateFontsPerScript ); + validFontsPerScriptCacheBuffer = mValidFontsPerScriptCache.Begin(); + } + if( NULL != validateFontsPerScript ) { if( !validateFontsPerScript->FindValidFont( fontId ) ) { // Use the font client to validate the font. - const GlyphIndex glyphIndex = fontClient.GetGlyphIndex( fontId, character ); + GlyphIndex glyphIndex = fontClient.GetGlyphIndex( fontId, character ); + + // Emojis are present in many monochrome fonts; prefer color by default. + if( TextAbstraction::EMOJI == script && + 0u != glyphIndex ) + { + BufferImage bitmap = fontClient.CreateBitmap( fontId, glyphIndex ); + if( bitmap && + Pixel::BGRA8888 != bitmap.GetPixelFormat() ) + { + glyphIndex = 0; + } + } if( 0u == glyphIndex ) { @@ -359,30 +493,8 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, } } } - else - { - // Use the font client to validate the font. - const GlyphIndex glyphIndex = fontClient.GetGlyphIndex( fontId, character ); - - if( 0u == glyphIndex ) - { - // Get the point size of the current font. It will be used to get a default font id. - pointSize = fontClient.GetPointSize( fontId ); - - // The font is not valid. Set to zero and a default one will be set. - fontId = 0u; - } - else - { - // Add the font to the valid font cache. - validateFontsPerScript = new ValidateFontsPerScript(); - *( validFontsPerScriptCacheBuffer + script ) = validateFontsPerScript; - - validateFontsPerScript->mValidFonts.PushBack( fontId ); - } - } } - } + } // !isDefault // The font has not been validated. Find a default one. if( 0u == fontId ) @@ -393,9 +505,27 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, // If the cache has not a default font, get one from the font client. if( 0u == fontId ) { + // Emojis are present in many monochrome fonts; prefer color by default. + bool preferColor = ( TextAbstraction::EMOJI == script ); + // Find a default font. - fontId = fontClient.FindDefaultFont( character, pointSize ); + fontId = fontClient.FindDefaultFont( character, pointSize, preferColor ); + + // If the system does not support a suitable font, fallback to Latin + if( 0u == fontId ) + { + fontId = *( defaultFontPerScriptCacheBuffer + TextAbstraction::LATIN ); + } + if( 0u == fontId ) + { + fontId = fontClient.FindDefaultFont( UTF32_A, pointSize ); + } +#ifdef DEBUG_ENABLED + Dali::TextAbstraction::FontDescription description; + fontClient.GetDescription( fontId, description ); + DALI_LOG_INFO( gLogFilter, Debug::Concise, "Script: %s; Selected font: %s\n", Dali::TextAbstraction::ScriptName[script], description.path.c_str() ); +#endif // Cache the font. *( defaultFontPerScriptCacheBuffer + script ) = fontId; } @@ -432,6 +562,13 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, } } +void MultilanguageSupport::ValidateFonts( LogicalModel& model, + CharacterIndex characterIndex, + Length numberOfCharactersToRemove, + Length numberOfCharactersToInsert ) +{ +} + } // namespace Internal } // namespace Text