/*
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2021 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <dali-toolkit/internal/text/multi-language-support-impl.h>
// EXTERNAL INCLUDES
-#include <dali/integration-api/debug.h>
-#include <dali/devel-api/adaptor-framework/singleton-service.h>
+#include <dali/devel-api/common/singleton-service.h>
#include <dali/devel-api/text-abstraction/font-client.h>
+#include <dali/integration-api/debug.h>
+
+// INTERNAL INCLUDES
+#include <dali-toolkit/internal/text/emoji-helper.h>
+#include <dali-toolkit/internal/text/multi-language-helper-functions.h>
namespace Dali
{
-
namespace Toolkit
{
-
namespace
{
#if defined(DEBUG_ENABLED)
#endif
const Dali::Toolkit::Text::Character UTF32_A = 0x0041;
-}
+} // namespace
namespace Text
{
-
namespace Internal
{
-
-/**
- * @brief Retrieves the font Id from the font run for a given character's @p index.
- *
- * If the character's index exceeds the current font run it increases the iterator to get the next one.
- *
- * @param[in] index The character's index.
- * @param[in,out] fontRunIt Iterator to the current font run.
- * @param[in] fontRunEndIt Iterator to one after the last font run.
- *
- * @return The font id.
- */
-FontId GetFontId( Length index,
- Vector<FontRun>::ConstIterator& fontRunIt,
- const Vector<FontRun>::ConstIterator& fontRunEndIt )
+bool ValidateFontsPerScript::IsValidFont(FontId fontId) const
{
- FontId fontId = 0u;
-
- if( fontRunIt != fontRunEndIt )
+ for(Vector<FontId>::ConstIterator it = mValidFonts.Begin(),
+ endIt = mValidFonts.End();
+ it != endIt;
+ ++it)
{
- const FontRun& fontRun = *fontRunIt;
-
- if( ( index >= fontRun.characterRun.characterIndex ) &&
- ( index < fontRun.characterRun.characterIndex + fontRun.characterRun.numberOfCharacters ) )
- {
- fontId = fontRun.fontId;
- }
-
- if( index + 1u == fontRun.characterRun.characterIndex + fontRun.characterRun.numberOfCharacters )
+ if(fontId == *it)
{
- // All the characters of the current run have been traversed. Get the next one for the next iteration.
- ++fontRunIt;
+ return true;
}
}
- return fontId;
+ return false;
}
-/**
- * @brief Retrieves the script Id from the script run for a given character's @p index.
- *
- * If the character's index exceeds the current script run it increases the iterator to get the next one.
- *
- * @param[in] index The character's index.
- * @param[in,out] scriptRunIt Iterator to the current font run.
- * @param[in] scriptRunEndIt Iterator to one after the last script run.
- *
- * @return The script.
- */
-Script GetScript( Length index,
- Vector<ScriptRun>::ConstIterator& scriptRunIt,
- const Vector<ScriptRun>::ConstIterator& scriptRunEndIt )
+FontId DefaultFonts::FindFont(TextAbstraction::FontClient& fontClient,
+ const TextAbstraction::FontDescription& description,
+ PointSize26Dot6 size) const
{
- Script script = TextAbstraction::UNKNOWN;
-
- if( scriptRunIt != scriptRunEndIt )
+ for(std::vector<CacheItem>::const_iterator it = mFonts.begin(),
+ endIt = mFonts.end();
+ it != endIt;
+ ++it)
{
- const ScriptRun& scriptRun = *scriptRunIt;
-
- if( ( index >= scriptRun.characterRun.characterIndex ) &&
- ( index < scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters ) )
- {
- script = scriptRun.script;
- }
+ const CacheItem& item = *it;
- if( index + 1u == scriptRun.characterRun.characterIndex + scriptRun.characterRun.numberOfCharacters )
+ 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)))
{
- // All the characters of the current run have been traversed. Get the next one for the next iteration.
- ++scriptRunIt;
+ return item.fontId;
}
}
- return script;
+ return 0u;
}
-bool ValidateFontsPerScript::FindValidFont( FontId fontId ) const
+void DefaultFonts::Cache(const TextAbstraction::FontDescription& description, FontId fontId)
{
- for( Vector<FontId>::ConstIterator it = mValidFonts.Begin(),
- endIt = mValidFonts.End();
- it != endIt;
- ++it )
- {
- if( fontId == *it )
- {
- return true;
- }
- }
-
- return false;
+ CacheItem item;
+ item.description = description;
+ item.fontId = fontId;
+ mFonts.push_back(item);
}
MultilanguageSupport::MultilanguageSupport()
{
// 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::GetNumberOfScripts(), 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.
- mValidFontsPerScriptCache.Resize( TextAbstraction::UNKNOWN, NULL );
+ mValidFontsPerScriptCache.Resize(TextAbstraction::GetNumberOfScripts(), NULL);
}
MultilanguageSupport::~MultilanguageSupport()
{
- // Destroy the valid fonts per script cache.
+ // Destroy the default font per script cache.
+ for(Vector<DefaultFonts*>::Iterator it = mDefaultFontPerScriptCache.Begin(),
+ endIt = mDefaultFontPerScriptCache.End();
+ it != endIt;
+ ++it)
+ {
+ delete *it;
+ }
- for( Vector<ValidateFontsPerScript*>::Iterator it = mValidFontsPerScriptCache.Begin(),
- endIt = mValidFontsPerScriptCache.End();
- it != endIt;
- ++it )
+ // Destroy the valid fonts per script cache.
+ for(Vector<ValidateFontsPerScript*>::Iterator it = mValidFontsPerScriptCache.Begin(),
+ endIt = mValidFontsPerScriptCache.End();
+ it != endIt;
+ ++it)
{
delete *it;
}
{
Text::MultilanguageSupport multilanguageSupportHandle;
- SingletonService service( SingletonService::Get() );
- if( service )
+ SingletonService service(SingletonService::Get());
+ if(service)
{
// Check whether the singleton is already created
- Dali::BaseHandle handle = service.GetSingleton( typeid( Text::MultilanguageSupport ) );
- if( handle )
+ Dali::BaseHandle handle = service.GetSingleton(typeid(Text::MultilanguageSupport));
+ if(handle)
{
// If so, downcast the handle
- MultilanguageSupport* impl = dynamic_cast< Internal::MultilanguageSupport* >( handle.GetObjectPtr() );
- multilanguageSupportHandle = Text::MultilanguageSupport( impl );
+ MultilanguageSupport* impl = dynamic_cast<Internal::MultilanguageSupport*>(handle.GetObjectPtr());
+ multilanguageSupportHandle = Text::MultilanguageSupport(impl);
}
else // create and register the object
{
- multilanguageSupportHandle = Text::MultilanguageSupport( new MultilanguageSupport );
- service.Register( typeid( multilanguageSupportHandle ), multilanguageSupportHandle );
+ multilanguageSupportHandle = Text::MultilanguageSupport(new MultilanguageSupport);
+ service.Register(typeid(multilanguageSupportHandle), multilanguageSupportHandle);
}
}
return multilanguageSupportHandle;
}
-void MultilanguageSupport::SetScripts( const Vector<Character>& text,
- Vector<ScriptRun>& scripts )
+void MultilanguageSupport::SetScripts(const Vector<Character>& text,
+ CharacterIndex startIndex,
+ Length numberOfCharacters,
+ Vector<ScriptRun>& scripts)
{
- const Length numberOfCharacters = text.Count();
-
- if( 0u == numberOfCharacters )
+ if(0u == numberOfCharacters)
{
// Nothing to do if there are no characters.
return;
}
+ // Find the first index where to insert the script.
+ ScriptRunIndex scriptIndex = 0u;
+ if(0u != startIndex)
+ {
+ for(Vector<ScriptRun>::ConstIterator it = scripts.Begin(),
+ endIt = scripts.End();
+ it != endIt;
+ ++it, ++scriptIndex)
+ {
+ const ScriptRun& run = *it;
+ if(startIndex < run.characterRun.characterIndex + run.characterRun.numberOfCharacters)
+ {
+ // Run found.
+ break;
+ }
+ }
+ }
+
// Stores the current script run.
ScriptRun currentScriptRun;
- currentScriptRun.characterRun.characterIndex = 0u;
+ currentScriptRun.characterRun.characterIndex = startIndex;
currentScriptRun.characterRun.numberOfCharacters = 0u;
- currentScriptRun.script = TextAbstraction::UNKNOWN;
+ currentScriptRun.script = TextAbstraction::UNKNOWN;
// Reserve some space to reduce the number of reallocations.
- scripts.Reserve( numberOfCharacters << 2u );
+ scripts.Reserve(text.Count() << 2u);
// Whether the first valid script needs to be set.
bool isFirstScriptToBeSet = true;
// 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();
+ // Initialize whether is right to left direction
+ currentScriptRun.isRightToLeft = false;
+
// Traverse all characters and set the scripts.
- for( Length index = 0u; index < numberOfCharacters; ++index )
+ const Length lastCharacter = startIndex + numberOfCharacters;
+
+ for(Length index = startIndex; index < lastCharacter; ++index)
{
- Character character = *( textBuffer + index );
+ Character character = *(textBuffer + index);
// Get the script of the character.
- Script script = TextAbstraction::GetCharacterScript( character );
+ Script script = TextAbstraction::GetCharacterScript(character);
// Some characters (like white spaces) are valid for many scripts. The rules to set a script
// for them are:
// 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 &&
- ( TextAbstraction::COMMON == script ) )
+ bool endOfText = index == lastCharacter;
+
+ //Handle all Emoji Sequence cases
+ if(IsNewSequence(textBuffer, currentScriptRun.script, index, lastCharacter, script))
{
+ AddCurrentScriptAndCreatNewScript(script,
+ false,
+ false,
+ currentScriptRun,
+ numberOfAllScriptCharacters,
+ scripts,
+ scriptIndex);
+ }
+ else if(IsScriptChangedToFollowSequence(currentScriptRun.script, character, script))
+ {
+ currentScriptRun.script = script;
+ }
+ else if(IsOneOfEmojiScripts(currentScriptRun.script) && (TextAbstraction::COMMON == script))
+ {
+ // Emojis doesn't mix well with characters common to all scripts. Insert the emoji run.
+ AddCurrentScriptAndCreatNewScript(TextAbstraction::UNKNOWN,
+ false,
+ false,
+ currentScriptRun,
+ numberOfAllScriptCharacters,
+ scripts,
+ scriptIndex);
+ }
+
+ while(!endOfText &&
+ (TextAbstraction::COMMON == script))
+ {
+ // Check if whether is right to left markup and Keeps true if the previous value was true.
+ currentScriptRun.isRightToLeft = currentScriptRun.isRightToLeft || TextAbstraction::IsRightToLeftMark(character);
+
// Count all these characters to be added into a script.
++numberOfAllScriptCharacters;
- if( TextAbstraction::IsNewParagraph( character ) )
+ if(TextAbstraction::IsNewParagraph(character))
{
// The character is a new paragraph.
// To know when there is a new paragraph is needed because if there is a white space
// the same direction than the first script of the paragraph.
isFirstScriptToBeSet = true;
- // Characters common to all scripts at the end of the paragraph are added to the last script (if the last one is not unknown).
- if( TextAbstraction::UNKNOWN != currentScriptRun.script )
- {
- currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters;
- numberOfAllScriptCharacters = 0u;
- }
+ AddCurrentScriptAndCreatNewScript(TextAbstraction::UNKNOWN,
+ false,
+ false,
+ currentScriptRun,
+ numberOfAllScriptCharacters,
+ scripts,
+ scriptIndex);
}
// Get the next character.
++index;
- endOfText = index == numberOfCharacters;
- if( !endOfText )
+ endOfText = index == lastCharacter;
+ if(!endOfText)
{
- character = *( textBuffer + index );
- script = TextAbstraction::GetCharacterScript( character );
+ character = *(textBuffer + index);
+ script = TextAbstraction::GetCharacterScript(character);
+
+ //Handle all Emoji Sequence cases
+ if(IsNewSequence(textBuffer, currentScriptRun.script, index, lastCharacter, script))
+ {
+ AddCurrentScriptAndCreatNewScript(script,
+ false,
+ false,
+ currentScriptRun,
+ numberOfAllScriptCharacters,
+ scripts,
+ scriptIndex);
+ }
+ else if(IsScriptChangedToFollowSequence(currentScriptRun.script, character, script))
+ {
+ currentScriptRun.script = script;
+ }
}
- }
+ } // end while( !endOfText && ( TextAbstraction::COMMON == script ) )
- if( endOfText )
+ 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.
}
// Check if it is the first character of a paragraph.
- if( isFirstScriptToBeSet &&
- ( TextAbstraction::UNKNOWN != script ) &&
- ( TextAbstraction::COMMON != script ) )
+ if(isFirstScriptToBeSet &&
+ (TextAbstraction::UNKNOWN != script) &&
+ (TextAbstraction::COMMON != script) &&
+ (TextAbstraction::EMOJI != script) &&
+ (TextAbstraction::EMOJI_TEXT != script) &&
+ (TextAbstraction::EMOJI_COLOR != script) &&
+ (!TextAbstraction::IsSymbolScript(script)))
{
// Sets the direction of the first valid script.
- isParagraphRTL = TextAbstraction::IsRightToLeftScript( script );
+ isParagraphRTL = currentScriptRun.isRightToLeft || TextAbstraction::IsRightToLeftScript(script);
isFirstScriptToBeSet = false;
}
- if( ( script != currentScriptRun.script ) &&
- ( TextAbstraction::COMMON != script ) )
+ if((script != currentScriptRun.script) &&
+ (TextAbstraction::COMMON != script))
{
// Current run needs to be stored and a new one initialized.
- if( ( isParagraphRTL == TextAbstraction::IsRightToLeftScript( currentScriptRun.script ) ) &&
- ( TextAbstraction::UNKNOWN != currentScriptRun.script ) )
+ if((isParagraphRTL == TextAbstraction::IsRightToLeftScript(currentScriptRun.script)) &&
+ (TextAbstraction::UNKNOWN != currentScriptRun.script))
{
// Previous script has the same 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;
}
- else if( ( TextAbstraction::IsRightToLeftScript( currentScriptRun.script ) == TextAbstraction::IsRightToLeftScript( script ) ) &&
- ( TextAbstraction::UNKNOWN != currentScriptRun.script ) )
+ else if((TextAbstraction::IsRightToLeftScript(currentScriptRun.script) == TextAbstraction::IsRightToLeftScript(script)) &&
+ (TextAbstraction::UNKNOWN != currentScriptRun.script))
{
// Current script and previous one have the same direction.
// 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 )
+ else if((TextAbstraction::UNKNOWN == currentScriptRun.script) &&
+ (TextAbstraction::IsSymbolOrEmojiOrTextScript(script)))
{
- // Store the script run.
- scripts.PushBack( currentScriptRun );
+ currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters;
+ numberOfAllScriptCharacters = 0u;
}
- // Initialize the new one.
- currentScriptRun.characterRun.characterIndex = currentScriptRun.characterRun.characterIndex + currentScriptRun.characterRun.numberOfCharacters;
- currentScriptRun.characterRun.numberOfCharacters = numberOfAllScriptCharacters + 1u; // Adds the white spaces which are at the begining of the script.
- currentScriptRun.script = script;
- numberOfAllScriptCharacters = 0u;
+ // Adds the white spaces which are at the begining of the script.
+ numberOfAllScriptCharacters++;
+ AddCurrentScriptAndCreatNewScript(script,
+ TextAbstraction::IsRightToLeftScript(script),
+ true,
+ currentScriptRun,
+ numberOfAllScriptCharacters,
+ scripts,
+ scriptIndex);
}
else
{
- if( TextAbstraction::UNKNOWN != currentScriptRun.script )
+ if(TextAbstraction::UNKNOWN != currentScriptRun.script)
{
// Adds white spaces between characters.
currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters;
// Add remaining characters into the last script.
currentScriptRun.characterRun.numberOfCharacters += numberOfAllScriptCharacters;
- DALI_ASSERT_DEBUG( ( 0u != currentScriptRun.characterRun.numberOfCharacters ) && "MultilanguageSupport::SetScripts() Trying to insert a script run with zero characters." );
-
- if( TextAbstraction::UNKNOWN == currentScriptRun.script )
+ if(0u != currentScriptRun.characterRun.numberOfCharacters)
{
- // There are only white spaces in the last script. Set the latin script.
- currentScriptRun.script = TextAbstraction::LATIN;
+ // Store the last run.
+ scripts.Insert(scripts.Begin() + scriptIndex, currentScriptRun);
+ ++scriptIndex;
}
- // Store the last run.
- scripts.PushBack( currentScriptRun );
+ if(scriptIndex < scripts.Count())
+ {
+ // Update the indices of the next script runs.
+ const ScriptRun& run = *(scripts.Begin() + scriptIndex - 1u);
+ CharacterIndex nextCharacterIndex = run.characterRun.characterIndex + run.characterRun.numberOfCharacters;
+
+ for(Vector<ScriptRun>::Iterator it = scripts.Begin() + scriptIndex,
+ endIt = scripts.End();
+ it != endIt;
+ ++it)
+ {
+ ScriptRun& run = *it;
+ run.characterRun.characterIndex = nextCharacterIndex;
+ nextCharacterIndex += run.characterRun.numberOfCharacters;
+ }
+ }
}
-void MultilanguageSupport::ValidateFonts( const Vector<Character>& text,
- const Vector<ScriptRun>& scripts,
- Vector<FontRun>& fonts )
+void MultilanguageSupport::ValidateFonts(const Vector<Character>& text,
+ const Vector<ScriptRun>& scripts,
+ const Vector<FontDescriptionRun>& fontDescriptions,
+ const TextAbstraction::FontDescription& defaultFontDescription,
+ TextAbstraction::PointSize26Dot6 defaultFontPointSize,
+ CharacterIndex startIndex,
+ Length numberOfCharacters,
+ Vector<FontRun>& fonts)
{
- DALI_LOG_INFO( gLogFilter, Debug::General, "-->MultilanguageSupport::ValidateFonts\n" );
- const Length numberOfCharacters = text.Count();
+ DALI_LOG_INFO(gLogFilter, Debug::General, "-->MultilanguageSupport::ValidateFonts\n");
- if( 0u == numberOfCharacters )
+ if(0u == numberOfCharacters)
{
- DALI_LOG_INFO( gLogFilter, Debug::General, "<--MultilanguageSupport::ValidateFonts\n" );
+ DALI_LOG_INFO(gLogFilter, Debug::General, "<--MultilanguageSupport::ValidateFonts\n");
// Nothing to do if there are no characters.
return;
}
- // Copy the fonts set by application developers.
- const Length numberOfFontRuns = fonts.Count();
- const Vector<FontRun> userSetFonts = fonts;
- fonts.Clear();
+ // Find the first index where to insert the font run.
+ FontRunIndex fontIndex = 0u;
+ if(0u != startIndex)
+ {
+ for(Vector<FontRun>::ConstIterator it = fonts.Begin(),
+ endIt = fonts.End();
+ it != endIt;
+ ++it, ++fontIndex)
+ {
+ const FontRun& run = *it;
+ if(startIndex < run.characterRun.characterIndex + run.characterRun.numberOfCharacters)
+ {
+ // Run found.
+ break;
+ }
+ }
+ }
// Traverse the characters and validate/set the fonts.
// Get the caches.
- FontId* defaultFontPerScriptCacheBuffer = mDefaultFontPerScriptCache.Begin();
- ValidateFontsPerScript** validFontsPerScriptCacheBuffer = mValidFontsPerScriptCache.Begin();
+ DefaultFonts** defaultFontPerScriptCacheBuffer = mDefaultFontPerScriptCache.Begin();
+ ValidateFontsPerScript** validFontsPerScriptCacheBuffer = mValidFontsPerScriptCache.Begin();
// Stores the validated font runs.
- fonts.Reserve( numberOfFontRuns );
+ fonts.Reserve(fontDescriptions.Count());
// Initializes a validated font run.
FontRun currentFontRun;
- currentFontRun.characterRun.characterIndex = 0u;
+ currentFontRun.characterRun.characterIndex = startIndex;
currentFontRun.characterRun.numberOfCharacters = 0u;
- currentFontRun.fontId = 0u;
- currentFontRun.isDefault = false;
+ currentFontRun.fontId = 0u;
+ currentFontRun.isBoldRequired = false;
+ currentFontRun.isItalicRequired = false;
// Get the font client.
TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
- // Iterators of the font and script runs.
- Vector<FontRun>::ConstIterator fontRunIt = userSetFonts.Begin();
- Vector<FontRun>::ConstIterator fontRunEndIt = userSetFonts.End();
- Vector<ScriptRun>::ConstIterator scriptRunIt = scripts.Begin();
- Vector<ScriptRun>::ConstIterator scriptRunEndIt = scripts.End();
+ const Character* const textBuffer = text.Begin();
- for( Length index = 0u; index < numberOfCharacters; ++index )
- {
- // Get the character.
- const Character character = *( text.Begin() + index );
+ // Iterators of the script runs.
+ Vector<ScriptRun>::ConstIterator scriptRunIt = scripts.Begin();
+ Vector<ScriptRun>::ConstIterator scriptRunEndIt = scripts.End();
+ bool isNewParagraphCharacter = false;
- // Get the font for the character.
- FontId fontId = GetFontId( index,
- fontRunIt,
- fontRunEndIt );
+ FontId previousEmojiFontId = 0u;
+ TextAbstraction::Script previousScript = TextAbstraction::UNKNOWN;
- // Get the script for the character.
- Script script = GetScript( index,
- scriptRunIt,
- scriptRunEndIt );
+ CharacterIndex lastCharacter = startIndex + numberOfCharacters;
+ for(Length index = startIndex; index < lastCharacter; ++index)
+ {
+ // Get the current character.
+ const Character character = *(textBuffer + index);
+ bool isItalicRequired = false;
+ bool isBoldRequired = false;
+
+ // new description for current character
+ 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);
+
+ // Get the script for the current character.
+ Script script = GetScript(index,
+ scriptRunIt,
+ scriptRunEndIt);
#ifdef DEBUG_ENABLED
{
Dali::TextAbstraction::FontDescription description;
- fontClient.GetDescription( fontId, description );
-
- DALI_LOG_INFO( gLogFilter,
- Debug::Verbose,
- " Initial font set\n Character : %x, Script : %s, Font : %s \n",
- character,
- Dali::TextAbstraction::ScriptName[script],
- description.path.c_str() );
+ fontClient.GetDescription(fontId, description);
+
+ DALI_LOG_INFO(gLogFilter,
+ Debug::Verbose,
+ " Initial font set\n Character : %x, Script : %s, Font : %s \n",
+ character,
+ Dali::TextAbstraction::ScriptName[script],
+ description.path.c_str());
}
#endif
- if( TextAbstraction::UNKNOWN == script )
+ // Validate whether the current character is supported by the given font.
+ bool isValidFont = false;
+
+ // Check first in the cache of default fonts per script and size.
+
+ FontId cachedDefaultFontId = 0u;
+ DefaultFonts* defaultFonts = *(defaultFontPerScriptCacheBuffer + script);
+ if(NULL != defaultFonts)
+ {
+ // This cache stores fall-back fonts.
+ cachedDefaultFontId = defaultFonts->FindFont(fontClient,
+ currentFontDescription,
+ currentFontPointSize);
+ }
+
+ // 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);
+
+ if(isValidFont)
{
- DALI_LOG_WARNING( "MultilanguageSupport::ValidateFonts. Unknown script!" );
- script = TextAbstraction::LATIN;
+ // Check if the font supports the character.
+ isValidFont = fontClient.IsCharacterSupportedByFont(fontId, character);
}
- // Whether the font being validated is a default one not set by the user.
- const bool isDefault = ( 0u == fontId );
- FontId preferredFont = fontId;
+ bool isCommonScript = false;
+ bool isEmojiScript = TextAbstraction::IsEmojiScript(script) || TextAbstraction::IsEmojiColorScript(script) || TextAbstraction::IsEmojiTextScript(script);
- DALI_LOG_INFO( gLogFilter,
- Debug::Verbose,
- " Is a default font : %s\n",
- ( isDefault ? "true" : "false" ) );
+ if(isEmojiScript && (previousScript == script))
+ {
+ // Emoji sequence should use the previous emoji font.
+ if(0u != previousEmojiFontId)
+ {
+ fontId = previousEmojiFontId;
+ isValidFont = true;
+ }
+ }
- // The default font point size.
- PointSize26Dot6 pointSize = TextAbstraction::FontClient::DEFAULT_POINT_SIZE;
+ // 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.
- if( !isDefault )
+ // Need to check if the given font supports the current character.
+ if(!isValidFont) // (1)
{
- // Validate if the font set by the user supports the character.
+ // 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) || TextAbstraction::IsEmojiPresentationSelector(character);
+
+ // Check in the valid fonts cache.
+ ValidateFontsPerScript* validateFontsPerScript = *(validFontsPerScriptCacheBuffer + script);
+
+ if(NULL != validateFontsPerScript)
+ {
+ // This cache stores valid fonts set by the user.
+ isValidFont = validateFontsPerScript->IsValidFont(fontId);
- // Check first in the caches.
+ // It may happen that a validated font for a script doesn't have all the glyphs for that script.
+ // i.e a font validated for the CJK script may contain glyphs for the chinese language but not for the Japanese.
+ if(isValidFont)
+ {
+ // Checks if the current character is supported by the font is needed.
+ isValidFont = fontClient.IsCharacterSupportedByFont(fontId, character);
+ }
+ }
- // The user may have set the default font. Check it. Otherwise check in the valid fonts cache.
- if( fontId != *( defaultFontPerScriptCacheBuffer + script ) )
+ if(!isValidFont) // (2)
{
- // Check in the valid fonts cache.
- ValidateFontsPerScript* validateFontsPerScript = *( validFontsPerScriptCacheBuffer + script );
+ // The selected font is not stored in any cache.
+
+ // Checks if the current character is supported by the selected font.
+ isValidFont = fontClient.IsCharacterSupportedByFont(fontId, character);
- if( NULL == validateFontsPerScript )
+ // If there is a valid font, cache it.
+ if(isValidFont && !isCommonScript)
{
- validateFontsPerScript = new ValidateFontsPerScript();
+ if(NULL == validateFontsPerScript)
+ {
+ validateFontsPerScript = new ValidateFontsPerScript();
+
+ *(validFontsPerScriptCacheBuffer + script) = validateFontsPerScript;
+ }
- *( validFontsPerScriptCacheBuffer + script ) = validateFontsPerScript;
+ validateFontsPerScript->mValidFonts.PushBack(fontId);
}
- if( NULL != validateFontsPerScript )
+ if(!isValidFont && (fontId != cachedDefaultFontId) && (!TextAbstraction::IsNewParagraph(character))) // (3)
{
- if( !validateFontsPerScript->FindValidFont( fontId ) )
+ // The selected font by the user or the platform's default font has failed to validate the character.
+
+ // Checks if the previously discarted cached default font supports the character.
+ bool isValidCachedFont = false;
+ if(isValidCachedDefaultFont)
{
- // Use the font client to validate the font.
- GlyphIndex glyphIndex = fontClient.GetGlyphIndex( fontId, character );
+ isValidCachedFont = fontClient.IsCharacterSupportedByFont(cachedDefaultFontId, 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(isValidCachedFont)
+ {
+ // 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.
- 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 );
+ DefaultFonts* defaultFontsPerScript = NULL;
+
+ // Find a fallback-font.
+ fontId = fontClient.FindFallbackFont(character,
+ currentFontDescription,
+ currentFontPointSize,
+ false);
- // The font is not valid. Set to zero and a default one will be set.
- fontId = 0u;
+ if(0u == fontId)
+ {
+ fontId = fontClient.FindDefaultFont(UTF32_A, currentFontPointSize);
}
- else
+
+ if(!isCommonScript && (script != TextAbstraction::UNKNOWN))
{
- // 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 ) )
+ // Cache the font if it is not an unknown script
+ if(NULL == defaultFontsPerScript)
{
- validateFontsPerScript = *( validFontsPerScriptCacheBuffer + TextAbstraction::COMMON );
+ defaultFontsPerScript = *(defaultFontPerScriptCacheBuffer + script);
- if( NULL == validateFontsPerScript )
+ if(NULL == defaultFontsPerScript)
{
- validateFontsPerScript = new ValidateFontsPerScript();
-
- *( validFontsPerScriptCacheBuffer + TextAbstraction::COMMON ) = validateFontsPerScript;
+ defaultFontsPerScript = new DefaultFonts();
+ *(defaultFontPerScriptCacheBuffer + script) = defaultFontsPerScript;
}
}
-
- validateFontsPerScript->mValidFonts.PushBack( fontId );
+ defaultFontsPerScript->Cache(currentFontDescription, fontId);
}
}
- }
- }
- } // !isDefault
+ } // !isValidFont (3)
+ } // !isValidFont (2)
+ } // !isValidFont (1)
- // The font has not been validated. Find a default one.
- if( 0u == fontId )
+ if(isEmojiScript && (previousScript != script))
{
- // The character has no font assigned. Get a default one from the cache
- fontId = *( defaultFontPerScriptCacheBuffer + script );
+ //New Emoji sequence should select font according to the variation selector (VS15 or VS16).
+ if(0u != currentFontRun.characterRun.numberOfCharacters)
+ {
+ // Store the font run.
+ fonts.Insert(fonts.Begin() + fontIndex, currentFontRun);
+ ++fontIndex;
+ }
- // If the cache has not a default font, get one from the font client.
- if( 0u == fontId )
+ // Initialize the new one.
+ currentFontRun.characterRun.characterIndex = currentFontRun.characterRun.characterIndex + currentFontRun.characterRun.numberOfCharacters;
+ currentFontRun.characterRun.numberOfCharacters = 0u;
+ currentFontRun.fontId = fontId;
+ currentFontRun.isItalicRequired = false;
+ currentFontRun.isBoldRequired = false;
+
+ if(TextAbstraction::IsEmojiColorScript(script) || TextAbstraction::IsEmojiTextScript(script))
{
- // Emojis are present in many monochrome fonts; prefer color by default.
- bool preferColor = ( TextAbstraction::EMOJI == script );
+ bool isModifiedByVariationSelector = false;
+ GlyphIndex glyphIndexChar = fontClient.GetGlyphIndex(fontId, character);
+ GlyphIndex glyphIndexCharByVS = fontClient.GetGlyphIndex(fontId, character, Text::GetVariationSelectorByScript(script));
- // Find a fallback-font.
- fontId = fontClient.FindFallbackFont( preferredFont, character, pointSize, preferColor );
+ isModifiedByVariationSelector = glyphIndexChar != glyphIndexCharByVS;
- // If the system does not support a suitable font, fallback to Latin
- if( 0u == fontId )
- {
- fontId = *( defaultFontPerScriptCacheBuffer + TextAbstraction::LATIN );
- }
- if( 0u == fontId )
+ if(isModifiedByVariationSelector)
{
- fontId = fontClient.FindDefaultFont( UTF32_A, pointSize );
+ FontId requestedFontId = fontClient.FindDefaultFont(character, currentFontPointSize, IsEmojiColorScript(script));
+ if(0u != requestedFontId)
+ {
+ currentFontRun.fontId = fontId = requestedFontId;
+ isValidFont = true;
+ }
}
+ }
+ }
- // Cache the font.
- *( defaultFontPerScriptCacheBuffer + script ) = fontId;
+ // Store the font id when the first character is an emoji.
+ if(isEmojiScript)
+ {
+ if(0u != fontId && previousScript != script)
+ {
+ previousEmojiFontId = fontId;
}
}
+ else
+ {
+ previousEmojiFontId = 0u;
+ }
#ifdef DEBUG_ENABLED
{
Dali::TextAbstraction::FontDescription description;
- fontClient.GetDescription( fontId, description );
- DALI_LOG_INFO( gLogFilter,
- Debug::Verbose,
- " Validated font set\n Character : %x, Script : %s, Font : %s \n",
- character,
- Dali::TextAbstraction::ScriptName[script],
- description.path.c_str() );
+ fontClient.GetDescription(fontId, description);
+ DALI_LOG_INFO(gLogFilter,
+ Debug::Verbose,
+ " Validated font set\n Character : %x, Script : %s, Font : %s \n",
+ character,
+ Dali::TextAbstraction::ScriptName[script],
+ description.path.c_str());
}
#endif
- // The font is now validated.
+ // Whether bols style is required.
+ isBoldRequired = (currentFontDescription.weight >= TextAbstraction::FontWeight::BOLD);
+
+ // Whether italic style is required.
+ isItalicRequired = (currentFontDescription.slant >= TextAbstraction::FontSlant::ITALIC);
- if( ( fontId != currentFontRun.fontId ) ||
- ( isDefault != currentFontRun.isDefault ) )
+ // The font is now validated.
+ if((fontId != currentFontRun.fontId) ||
+ isNewParagraphCharacter ||
+ // If font id is same as previous but style is diffrent, initialize new one
+ ((fontId == currentFontRun.fontId) && ((isBoldRequired != currentFontRun.isBoldRequired) || (isItalicRequired != currentFontRun.isItalicRequired))))
{
// Current run needs to be stored and a new one initialized.
- if( 0u != currentFontRun.characterRun.numberOfCharacters )
+ if(0u != currentFontRun.characterRun.numberOfCharacters)
{
// Store the font run.
- fonts.PushBack( currentFontRun );
+ fonts.Insert(fonts.Begin() + fontIndex, currentFontRun);
+ ++fontIndex;
}
// Initialize the new one.
- currentFontRun.characterRun.characterIndex = currentFontRun.characterRun.characterIndex + currentFontRun.characterRun.numberOfCharacters;
+ currentFontRun.characterRun.characterIndex = currentFontRun.characterRun.characterIndex + currentFontRun.characterRun.numberOfCharacters;
currentFontRun.characterRun.numberOfCharacters = 0u;
- currentFontRun.fontId = fontId;
- currentFontRun.isDefault = isDefault;
+ currentFontRun.fontId = fontId;
+ currentFontRun.isBoldRequired = isBoldRequired;
+ currentFontRun.isItalicRequired = isItalicRequired;
}
// Add one more character to the run.
++currentFontRun.characterRun.numberOfCharacters;
- }
- if( 0u != currentFontRun.characterRun.numberOfCharacters )
+ // Whether the current character is a new paragraph character.
+ isNewParagraphCharacter = TextAbstraction::IsNewParagraph(character);
+ previousScript = script;
+ } // end traverse characters.
+
+ if(0u != currentFontRun.characterRun.numberOfCharacters)
{
// Store the last run.
- fonts.PushBack( currentFontRun );
+ fonts.Insert(fonts.Begin() + fontIndex, currentFontRun);
+ ++fontIndex;
}
- DALI_LOG_INFO( gLogFilter, Debug::General, "<--MultilanguageSupport::ValidateFonts\n" );
+
+ if(fontIndex < fonts.Count())
+ {
+ // Update the indices of the next font runs.
+ const FontRun& run = *(fonts.Begin() + fontIndex - 1u);
+ CharacterIndex nextCharacterIndex = run.characterRun.characterIndex + run.characterRun.numberOfCharacters;
+
+ for(Vector<FontRun>::Iterator it = fonts.Begin() + fontIndex,
+ endIt = fonts.End();
+ it != endIt;
+ ++it)
+ {
+ FontRun& run = *it;
+
+ run.characterRun.characterIndex = nextCharacterIndex;
+ nextCharacterIndex += run.characterRun.numberOfCharacters;
+ }
+ }
+
+ DALI_LOG_INFO(gLogFilter, Debug::General, "<--MultilanguageSupport::ValidateFonts\n");
+}
+
+void MultilanguageSupport::AddCurrentScriptAndCreatNewScript(const Script requestedScript,
+ const bool isRightToLeft,
+ const bool addScriptCharactersToNewScript,
+ ScriptRun& currentScriptRun,
+ Length& numberOfAllScriptCharacters,
+ Vector<ScriptRun>& scripts,
+ ScriptRunIndex& scriptIndex)
+{
+ // Add the pending characters to the current script
+ currentScriptRun.characterRun.numberOfCharacters += (addScriptCharactersToNewScript ? 0u : numberOfAllScriptCharacters);
+
+ // In-case the current script is empty then no need to add it for scripts
+ if(0u != currentScriptRun.characterRun.numberOfCharacters)
+ {
+ // Store the script run.
+ scripts.Insert(scripts.Begin() + scriptIndex, currentScriptRun);
+ ++scriptIndex;
+ }
+
+ // Initialize the new one by the requested script
+ currentScriptRun.characterRun.characterIndex = currentScriptRun.characterRun.characterIndex + currentScriptRun.characterRun.numberOfCharacters;
+ currentScriptRun.characterRun.numberOfCharacters = (addScriptCharactersToNewScript ? numberOfAllScriptCharacters : 0u);
+ currentScriptRun.script = requestedScript;
+ numberOfAllScriptCharacters = 0u;
+ // Initialize whether is right to left direction
+ currentScriptRun.isRightToLeft = isRightToLeft;
}
} // namespace Internal
projects / platform / core / uifw / dali-toolkit.git / blobdiff