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=ae9a68b6793e1c3cb7eb987182cf72befeaf355f;hp=81598d9d28fe379f31e5f423667da1e5bc3471b7;hb=c3f9162ab11786380e2ec9c55f217c2daf7722e8;hpb=cdefdbdee1cb3fd4051e220bb185d97b6000a037 diff --git a/dali-toolkit/internal/text/multi-language-support-impl.cpp b/dali-toolkit/internal/text/multi-language-support-impl.cpp index 81598d9..ae9a68b 100644 --- a/dali-toolkit/internal/text/multi-language-support-impl.cpp +++ b/dali-toolkit/internal/text/multi-language-support-impl.cpp @@ -47,7 +47,7 @@ namespace Text namespace Internal { -bool ValidateFontsPerScript::FindValidFont( FontId fontId ) const +bool ValidateFontsPerScript::IsValidFont( FontId fontId ) const { for( Vector::ConstIterator it = mValidFonts.Begin(), endIt = mValidFonts.End(); @@ -63,13 +63,45 @@ bool ValidateFontsPerScript::FindValidFont( FontId fontId ) const return false; } +FontId DefaultFonts::FindFont( TextAbstraction::FontClient& fontClient, + const TextAbstraction::FontDescription& description, + PointSize26Dot6 size ) const +{ + for( std::vector::const_iterator it = mFonts.begin(), + endIt = mFonts.end(); + it != endIt; + ++it ) + { + const CacheItem& item = *it; + + if( ( ( TextAbstraction::FontWeight::NONE == description.weight ) || ( description.weight == item.description.weight ) ) && + ( ( TextAbstraction::FontWidth::NONE == description.width ) || ( description.width == item.description.width ) ) && + ( ( TextAbstraction::FontSlant::NONE == description.slant ) || ( description.slant == item.description.slant ) ) && + ( size == fontClient.GetPointSize( item.fontId ) ) && + ( description.family.empty() || ( description.family == item.description.family ) ) ) + { + return item.fontId; + } + } + + return 0u; +} + +void DefaultFonts::Cache( const TextAbstraction::FontDescription& description, FontId fontId ) +{ + CacheItem item; + item.description = description; + item.fontId = fontId; + mFonts.push_back( item ); +} + MultilanguageSupport::MultilanguageSupport() : mDefaultFontPerScriptCache(), mValidFontsPerScriptCache() { // Initializes the default font cache to zero (invalid font). // Reserves space to cache the default fonts and access them with the script as an index. - mDefaultFontPerScriptCache.Resize( TextAbstraction::UNKNOWN, 0u ); + mDefaultFontPerScriptCache.Resize( TextAbstraction::UNKNOWN, NULL ); // Initializes the valid fonts cache to NULL (no valid fonts). // Reserves space to cache the valid fonts and access them with the script as an index. @@ -78,8 +110,16 @@ MultilanguageSupport::MultilanguageSupport() MultilanguageSupport::~MultilanguageSupport() { - // Destroy the valid fonts per script cache. + // Destroy the default font per script cache. + for( Vector::Iterator it = mDefaultFontPerScriptCache.Begin(), + endIt = mDefaultFontPerScriptCache.End(); + it != endIt; + ++it ) + { + delete *it; + } + // Destroy the valid fonts per script cache. for( Vector::Iterator it = mValidFontsPerScriptCache.Begin(), endIt = mValidFontsPerScriptCache.End(); it != endIt; @@ -161,7 +201,7 @@ void MultilanguageSupport::SetScripts( const Vector& text, // 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. + // Pointers to the text buffer. const Character* const textBuffer = text.Begin(); // Traverse all characters and set the scripts. @@ -186,6 +226,19 @@ void MultilanguageSupport::SetScripts( const Vector& text, while( !endOfText && ( TextAbstraction::COMMON == script ) ) { + if( TextAbstraction::EMOJI == currentScriptRun.script ) + { + // Emojis doesn't mix well with characters common to all scripts. Insert the emoji run. + scripts.Insert( scripts.Begin() + scriptIndex, currentScriptRun ); + ++scriptIndex; + + // Initialize the new one. + currentScriptRun.characterRun.characterIndex = currentScriptRun.characterRun.characterIndex + currentScriptRun.characterRun.numberOfCharacters; + currentScriptRun.characterRun.numberOfCharacters = 0u; + currentScriptRun.script = TextAbstraction::UNKNOWN; + numberOfAllScriptCharacters = 0u; + } + // Count all these characters to be added into a script. ++numberOfAllScriptCharacters; @@ -213,7 +266,7 @@ void MultilanguageSupport::SetScripts( const Vector& text, currentScriptRun.characterRun.numberOfCharacters = 0u; currentScriptRun.script = TextAbstraction::UNKNOWN; numberOfAllScriptCharacters = 0u; - } + } // Get the next character. ++index; @@ -223,7 +276,7 @@ void MultilanguageSupport::SetScripts( const Vector& text, character = *( textBuffer + index ); script = TextAbstraction::GetCharacterScript( character ); } - } + } // end while( !endOfText && ( TextAbstraction::COMMON == script ) ) if( endOfText ) { @@ -235,7 +288,8 @@ void MultilanguageSupport::SetScripts( const Vector& text, // Check if it is the first character of a paragraph. if( isFirstScriptToBeSet && ( TextAbstraction::UNKNOWN != script ) && - ( TextAbstraction::COMMON != script ) ) + ( TextAbstraction::COMMON != script ) && + ( TextAbstraction::EMOJI != script ) ) { // Sets the direction of the first valid script. isParagraphRTL = TextAbstraction::IsRightToLeftScript( script ); @@ -263,6 +317,13 @@ void MultilanguageSupport::SetScripts( const Vector& text, currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters; numberOfAllScriptCharacters = 0u; } + else if( ( TextAbstraction::UNKNOWN == currentScriptRun.script ) && + ( TextAbstraction::EMOJI == script ) ) + { + currentScriptRun.script = TextAbstraction::LATIN; + currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters; + numberOfAllScriptCharacters = 0u; + } if( 0u != currentScriptRun.characterRun.numberOfCharacters ) { @@ -328,7 +389,8 @@ void MultilanguageSupport::SetScripts( const Vector& text, void MultilanguageSupport::ValidateFonts( const Vector& text, const Vector& scripts, const Vector& fontDescriptions, - FontId defaultFontId, + const TextAbstraction::FontDescription& defaultFontDescription, + TextAbstraction::PointSize26Dot6 defaultFontPointSize, CharacterIndex startIndex, Length numberOfCharacters, Vector& fonts ) @@ -363,7 +425,7 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, // Traverse the characters and validate/set the fonts. // Get the caches. - FontId* defaultFontPerScriptCacheBuffer = mDefaultFontPerScriptCache.Begin(); + DefaultFonts** defaultFontPerScriptCacheBuffer = mDefaultFontPerScriptCache.Begin(); ValidateFontsPerScript** validFontsPerScriptCacheBuffer = mValidFontsPerScriptCache.Begin(); // Stores the validated font runs. @@ -378,44 +440,46 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, // Get the font client. TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get(); - // Get the default font description and default size. - TextAbstraction::FontDescription defaultFontDescription; - TextAbstraction::PointSize26Dot6 defaultPointSize = TextAbstraction::FontClient::DEFAULT_POINT_SIZE; - if( defaultFontId > 0u ) - { - fontClient.GetDescription( defaultFontId, defaultFontDescription ); - defaultPointSize = fontClient.GetPointSize( defaultFontId ); - } - - // Merge font descriptions - Vector fontIds; - fontIds.Resize( numberOfCharacters, defaultFontId ); - MergeFontDescriptions( fontDescriptions, - fontIds, - defaultFontDescription, - defaultPointSize, - startIndex, - numberOfCharacters ); - const Character* const textBuffer = text.Begin(); - const FontId* const fontIdsBuffer = fontIds.Begin(); + + // Iterators of the script runs. Vector::ConstIterator scriptRunIt = scripts.Begin(); Vector::ConstIterator scriptRunEndIt = scripts.End(); bool isNewParagraphCharacter = false; + FontId currentFontId = 0u; + FontId previousFontId = 0u; + bool isPreviousEmojiScript = false; + + // Whether it's the first set of characters to be validated. + // Used in case the paragraph starts with characters common to all scripts. + bool isFirstSetToBeValidated = true; + CharacterIndex lastCharacter = startIndex + numberOfCharacters; for( Length index = startIndex; index < lastCharacter; ++index ) { - // Get the character. + // Get the current character. const Character character = *( textBuffer + index ); - // Get the font for the character. - FontId fontId = *( fontIdsBuffer + index - startIndex ); - - // Get the script for the character. - Script script = GetScript( index, - scriptRunIt, - scriptRunEndIt ); + TextAbstraction::FontDescription currentFontDescription; + TextAbstraction::PointSize26Dot6 currentFontPointSize = defaultFontPointSize; + bool isDefaultFont = true; + MergeFontDescriptions( fontDescriptions, + defaultFontDescription, + defaultFontPointSize, + index, + currentFontDescription, + currentFontPointSize, + isDefaultFont ); + + // Get the font for the current character. + FontId fontId = fontClient.GetFontId( currentFontDescription, currentFontPointSize ); + currentFontId = fontId; + + // Get the script for the current character. + const Script script = GetScript( index, + scriptRunIt, + scriptRunEndIt ); #ifdef DEBUG_ENABLED { @@ -431,108 +495,178 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, } #endif - // Whether the font being validated is a default one not set by the user. - FontId preferredFont = fontId; + // Validate whether the current character is supported by the given font. + bool isValidFont = false; - // Validate if the font set by the user supports the character. + // Check first in the cache of default fonts per script and size. - // Check first in the caches. - - // The user may have set the default font. Check it. Otherwise check in the valid fonts cache. - if( fontId != *( defaultFontPerScriptCacheBuffer + script ) ) + DefaultFonts* defaultFonts = *( defaultFontPerScriptCacheBuffer + script ); + FontId cachedDefaultFontId = 0u; + if( NULL != defaultFonts ) { - // Check in the valid fonts cache. - ValidateFontsPerScript* validateFontsPerScript = *( validFontsPerScriptCacheBuffer + script ); + cachedDefaultFontId = defaultFonts->FindFont( fontClient, + currentFontDescription, + currentFontPointSize ); + } - if( NULL == validateFontsPerScript ) - { - validateFontsPerScript = new ValidateFontsPerScript(); + // Whether the cached default font is valid. + const bool isValidCachedDefaultFont = 0u != cachedDefaultFontId; + + // The font is valid if it matches with the default one for the current script and size and it's different than zero. + isValidFont = isValidCachedDefaultFont && ( fontId == cachedDefaultFontId ); + + bool isCommonScript = false; + bool isEmojiScript = TextAbstraction::EMOJI == script; - *( validFontsPerScriptCacheBuffer + script ) = validateFontsPerScript; + if( isEmojiScript && !isPreviousEmojiScript ) + { + if( 0u != currentFontRun.characterRun.numberOfCharacters ) + { + // Store the font run. + fonts.Insert( fonts.Begin() + fontIndex, currentFontRun ); + ++fontIndex; } - if( NULL != validateFontsPerScript ) + // Initialize the new one. + currentFontRun.characterRun.characterIndex = currentFontRun.characterRun.characterIndex + currentFontRun.characterRun.numberOfCharacters; + currentFontRun.characterRun.numberOfCharacters = 0u; + currentFontRun.fontId = fontId; + } + + + // If the given font is not valid, it means either: + // - there is no cached font for the current script yet or, + // - the user has set a different font than the default one for the current script or, + // - the platform default font is different than the default font for the current script. + + // Need to check if the given font supports the current character. + if( !isValidFont ) // (1) + { + // Whether the current character is common for all scripts (i.e. white spaces, ...) + + // Is not desirable to cache fonts for the common script. + // + // i.e. Consider the text " हिंदी", the 'white space' has assigned the DEVANAGARI script. + // The user may have set a font or the platform's default is used. + // + // As the 'white space' is the first character, no font is cached so the font validation + // retrieves a glyph from the given font. + // + // Many fonts support 'white spaces' so probably the font set by the user or the platform's default + // supports the 'white space'. However, that font may not support the DEVANAGARI script. + isCommonScript = TextAbstraction::IsCommonScript( character ); + + if( isCommonScript ) { - if( !validateFontsPerScript->FindValidFont( fontId ) ) + if( isValidCachedDefaultFont && + ( isDefaultFont || ( currentFontId == previousFontId ) ) && + !isEmojiScript ) + { + // At this point the character common for all scripts has no font assigned. + // If there is a valid previously cached default font for it, use that one. + fontId = cachedDefaultFontId; + isValidFont = true; + } + } + else + { + // Check in the valid fonts cache. + ValidateFontsPerScript* validateFontsPerScript = *( validFontsPerScriptCacheBuffer + script ); + + if( NULL != validateFontsPerScript ) + { + isValidFont = validateFontsPerScript->IsValidFont( fontId ); + } + + if( !isValidFont ) // (2) { // Use the font client to validate the font. - GlyphIndex glyphIndex = fontClient.GetGlyphIndex( fontId, character ); + const GlyphIndex glyphIndex = fontClient.GetGlyphIndex( fontId, character ); + + // The font is valid if there is a glyph for that character. + isValidFont = 0u != glyphIndex; // Emojis are present in many monochrome fonts; prefer color by default. - if( ( TextAbstraction::EMOJI == script ) && - ( 0u != glyphIndex ) ) + if( isValidFont && + isEmojiScript ) { - BufferImage bitmap = fontClient.CreateBitmap( fontId, glyphIndex ); - if( bitmap && - ( Pixel::BGRA8888 != bitmap.GetPixelFormat() ) ) - { - glyphIndex = 0u; - } - } + const PixelData bitmap = fontClient.CreateBitmap( fontId, glyphIndex ); - if( 0u == glyphIndex ) - { - // The font is not valid. Set to zero and a default one will be set. - fontId = 0u; + // For color emojis, the font is valid if the bitmap is RGBA. + isValidFont = bitmap && ( Pixel::BGRA8888 == bitmap.GetPixelFormat() ); } - else + + // If there is a valid font, cache it. + if( isValidFont ) { - // Add the font to the valid font cache. - - // At this point the validated font supports the given character. However, characters - // common for all scripts, like white spaces or new paragraph characters, need to be - // processed differently. - // - // i.e. A white space can have assigned a DEVANAGARI script but the font assigned may not - // support none of the DEVANAGARI glyphs. This font can't be added to the cache as a valid - // font for the DEVANAGARI script but the COMMON one. - if( TextAbstraction::IsCommonScript( character ) ) + if( NULL == validateFontsPerScript ) { - validateFontsPerScript = *( validFontsPerScriptCacheBuffer + TextAbstraction::COMMON ); + validateFontsPerScript = new ValidateFontsPerScript(); - if( NULL == validateFontsPerScript ) - { - validateFontsPerScript = new ValidateFontsPerScript(); - - *( validFontsPerScriptCacheBuffer + TextAbstraction::COMMON ) = validateFontsPerScript; - } + *( validFontsPerScriptCacheBuffer + script ) = validateFontsPerScript; } validateFontsPerScript->mValidFonts.PushBack( fontId ); } - } - } - } - // The font has not been validated. Find a default one. - if( 0u == fontId ) - { - // The character has no font assigned. Get a default one from the cache - fontId = *( defaultFontPerScriptCacheBuffer + script ); + if( !isValidFont ) // (3) + { + // The given font has not been validated. - // 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 ); + if( isValidCachedDefaultFont ) + { + // Use the cached default font for the script if there is one. + fontId = cachedDefaultFontId; + } + else + { + // There is no valid cached default font for the script. - // Find a fallback-font. - fontId = fontClient.FindFallbackFont( preferredFont, character, defaultPointSize, preferColor ); + DefaultFonts* defaultFontsPerScript = NULL; - // 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, defaultPointSize ); - } + // Emojis are present in many monochrome fonts; prefer color by default. + const bool preferColor = ( TextAbstraction::EMOJI == script ); - // Cache the font. - *( defaultFontPerScriptCacheBuffer + script ) = fontId; - } - } + // Find a fallback-font. + fontId = fontClient.FindFallbackFont( character, + currentFontDescription, + currentFontPointSize, + preferColor ); + + if( 0u == fontId ) + { + // If the system does not support a suitable font, fallback to Latin + defaultFontsPerScript = *( defaultFontPerScriptCacheBuffer + TextAbstraction::LATIN ); + if( NULL != defaultFontsPerScript ) + { + fontId = defaultFontsPerScript->FindFont( fontClient, + currentFontDescription, + currentFontPointSize ); + } + } + + if( 0u == fontId ) + { + fontId = fontClient.FindDefaultFont( UTF32_A, currentFontPointSize ); + } + + // Cache the font. + if( NULL == defaultFontsPerScript ) + { + defaultFontsPerScript = *( defaultFontPerScriptCacheBuffer + script ); + + if( NULL == defaultFontsPerScript ) + { + defaultFontsPerScript = new DefaultFonts(); + *( defaultFontPerScriptCacheBuffer + script ) = defaultFontsPerScript; + } + } + defaultFontsPerScript->Cache( currentFontDescription, fontId ); + } + } // !isValidFont (3) + } // !isValidFont (2) + } // !isCommonScript + } // !isValidFont (1) #ifdef DEBUG_ENABLED { @@ -547,6 +681,12 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, } #endif + if( isFirstSetToBeValidated && !isCommonScript ) + { + currentFontRun.fontId = fontId; + isFirstSetToBeValidated = false; + } + // The font is now validated. if( ( fontId != currentFontRun.fontId ) || isNewParagraphCharacter ) @@ -564,6 +704,11 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, currentFontRun.characterRun.characterIndex = currentFontRun.characterRun.characterIndex + currentFontRun.characterRun.numberOfCharacters; currentFontRun.characterRun.numberOfCharacters = 0u; currentFontRun.fontId = fontId; + + if( isNewParagraphCharacter ) + { + isFirstSetToBeValidated = true; + } } // Add one more character to the run. @@ -571,7 +716,9 @@ void MultilanguageSupport::ValidateFonts( const Vector& text, // Whether the current character is a new paragraph character. isNewParagraphCharacter = TextAbstraction::IsNewParagraph( character ); - } + previousFontId = currentFontId; + isPreviousEmojiScript = isEmojiScript; + } // end traverse characters. if( 0u != currentFontRun.characterRun.numberOfCharacters ) {