// CLASS HEADER
#include <dali-toolkit/public-api/text/text-controller.h>
-// EXTERNAL INCLUDES
-#include <dali/public-api/text-abstraction/font-client.h>
-
// INTERNAL INCLUDES
#include <dali-toolkit/public-api/text/character-set-conversion.h>
#include <dali-toolkit/public-api/text/layouts/layout-engine.h>
#include <dali-toolkit/public-api/text/logical-model.h>
+#include <dali-toolkit/public-api/text/multi-language-support.h>
+#include <dali-toolkit/public-api/text/script-run.h>
+#include <dali-toolkit/public-api/text/shaper.h>
#include <dali-toolkit/public-api/text/text-view.h>
#include <dali-toolkit/public-api/text/visual-model.h>
+// EXTERNAL INCLUDES
+#include <dali/public-api/text-abstraction/font-client.h>
+#include <limits>
+
namespace Dali
{
struct Controller::Impl
{
Impl()
- : mNewTextArrived( false )
+ : mNewText(),
+ mOperations( NO_OPERATION )
{
mLogicalModel = LogicalModel::New();
mVisualModel = VisualModel::New();
}
std::string mNewText;
- bool mNewTextArrived;
LogicalModelPtr mLogicalModel;
VisualModelPtr mVisualModel;
LayoutEngine mLayoutEngine;
TextAbstraction::FontClient mFontClient;
+
+ OperationsMask mOperations;
};
ControllerPtr Controller::New()
{
// Keep until size negotiation
mImpl->mNewText = text;
- mImpl->mNewTextArrived = true;
+ mImpl->mOperations = ALL_OPERATIONS;
}
bool Controller::Relayout( const Vector2& size )
{
+ if( ( size.width < Math::MACHINE_EPSILON_1000 ) || ( size.height < Math::MACHINE_EPSILON_1000 ) )
+ {
+ // Not worth to relayout if width or height is equal to zero.
+ return false;
+ }
+
+ bool viewUpdated = false;
+
+ if( size != mControlSize )
+ {
+ viewUpdated = DoRelayout( size, mImpl->mOperations );
+
+ // Do not re-do any operation until something changes.
+ mImpl->mOperations = NO_OPERATION;
+
+ mControlSize = size;
+ }
+
+ return viewUpdated;
+}
+
+bool Controller::DoRelayout( const Vector2& size, OperationsMask operations )
+{
bool viewUpdated( false );
- if( mImpl->mNewTextArrived )
+ Vector<Character> utf32Characters;
+ Length characterCount = 0u;
+ if( CONVERT_TO_UTF32 & operations )
{
std::string& text = mImpl->mNewText;
// Convert text into UTF-32
- Vector<Character> utf32Characters;
utf32Characters.Resize( text.size() );
// This is a bit horrible but std::string returns a (signed) char*
const uint8_t* utf8 = reinterpret_cast<const uint8_t*>( text.c_str() );
- Length characterCount = Utf8ToUtf32( utf8, text.size(), &utf32Characters[0] );
+ // Transform a text array encoded in utf8 into an array encoded in utf32.
+ // It returns the actual number of characters.
+ characterCount = Utf8ToUtf32( utf8, text.size(), utf32Characters.Begin() );
+ utf32Characters.Resize( characterCount );
- // Manipulate the logical model
- mImpl->mLogicalModel->SetText( &utf32Characters[0], characterCount );
-
- // Update the visual model
- mImpl->mLayoutEngine.UpdateVisualModel( size, *mImpl->mLogicalModel, *mImpl->mVisualModel );
+ // Sets the text into the model.
+ mImpl->mLogicalModel->SetText( utf32Characters.Begin(), characterCount );
// Discard temporary text
- mImpl->mNewTextArrived = false;
text.clear();
+ }
+
+ const bool getScripts = GET_SCRIPTS & operations;
+ const bool validateFonts = VALIDATE_FONTS & operations;
+
+ Vector<ScriptRun> scripts;
+ Vector<FontRun> fonts;
+ if( getScripts || validateFonts )
+ {
+ // Validates the fonts assigned by the application or assigns default ones.
+ // It makes sure all the characters are going to be rendered by the correct font.
+ MultilanguageSupport multilanguageSupport = MultilanguageSupport::Get();
+
+ if( getScripts )
+ {
+ // Retrieves the scripts used in the text.
+ multilanguageSupport.SetScripts( utf32Characters,
+ scripts );
+
+ // Sets the scripts into the model.
+ mImpl->mLogicalModel->SetScripts( scripts.Begin(), scripts.Count() );
+ }
+
+ if( validateFonts )
+ {
+ // Validates the fonts. If there is a character with no assigned font it sets a default one.
+ // After this call, fonts are validated.
+ multilanguageSupport.ValidateFonts( utf32Characters,
+ scripts,
+ fonts );
+
+ // Sets the fonts into the model.
+ mImpl->mLogicalModel->SetFonts( fonts.Begin(), fonts.Count() );
+ }
+ }
+
+ Vector<LineBreakInfo> lineBreakInfo;
+ if( GET_LINE_BREAKS & operations )
+ {
+ // Retrieves the line break info. The line break info is used to split the text in 'paragraphs' to
+ // calculate the bidirectional info for each 'paragraph'.
+ // It's also used to layout the text (where it should be a new line) or to shape the text (text in different lines
+ // is not shaped together).
+ lineBreakInfo.Resize( characterCount, TextAbstraction::LINE_NO_BREAK );
+ mImpl->mLogicalModel->SetLineBreakInfo( lineBreakInfo.Begin(), characterCount );
+ }
+
+ Vector<GlyphInfo> glyphs;
+ Vector<CharacterIndex> characterIndices;
+ Vector<Length> charactersPerGlyph;
+ if( SHAPE_TEXT & operations )
+ {
+ // Shapes the text.
+ ShapeText( utf32Characters,
+ lineBreakInfo,
+ scripts,
+ fonts,
+ glyphs,
+ characterIndices,
+ charactersPerGlyph );
+ }
+
+ if( GET_GLYPH_METRICS & operations )
+ {
+ TextAbstraction::FontClient::Get().GetGlyphMetrics( glyphs.Begin(), glyphs.Count() );
+ }
+
+ if( LAYOUT & operations )
+ {
+ if( 0u == glyphs.Count() )
+ {
+ const Length numberOfGlyphs = mImpl->mVisualModel->GetNumberOfGlyphs();
+
+ glyphs.Resize( numberOfGlyphs );
+ characterIndices.Resize( numberOfGlyphs );
+ charactersPerGlyph.Resize( numberOfGlyphs );
+
+ mImpl->mVisualModel->GetGlyphs( glyphs.Begin(),
+ 0u,
+ numberOfGlyphs );
+
+ mImpl->mVisualModel->GetGlyphToCharacterMap( characterIndices.Begin(),
+ 0u,
+ numberOfGlyphs );
+
+ mImpl->mVisualModel->GetCharactersPerGlyphMap( charactersPerGlyph.Begin(),
+ 0u,
+ numberOfGlyphs );
+ }
+
+ // Update the visual model
+ mImpl->mLayoutEngine.UpdateVisualModel( size,
+ glyphs,
+ characterIndices,
+ charactersPerGlyph,
+ *mImpl->mVisualModel );
viewUpdated = true;
}
return viewUpdated;
}
+Vector3 Controller::GetNaturalSize()
+{
+ // Operations that can be done only once until the text changes.
+ const OperationsMask onlyOnceOperations = static_cast<OperationsMask>( CONVERT_TO_UTF32 |
+ GET_SCRIPTS |
+ VALIDATE_FONTS |
+ GET_LINE_BREAKS |
+ GET_WORD_BREAKS |
+ SHAPE_TEXT |
+ GET_GLYPH_METRICS );
+
+ // Operations that need to be done if the size or the text changes.
+ const OperationsMask sizeOperations = static_cast<OperationsMask>( LAYOUT |
+ REORDER );
+
+ const float maxFloat = std::numeric_limits<float>::max();
+ DoRelayout( Vector2( maxFloat, maxFloat ),
+ static_cast<OperationsMask>( onlyOnceOperations |
+ sizeOperations ) );
+
+ // Do not do again the only once operations.
+ mImpl->mOperations = static_cast<OperationsMask>( mImpl->mOperations & ~onlyOnceOperations );
+
+ // Do the size related operations again.
+ mImpl->mOperations = static_cast<OperationsMask>( mImpl->mOperations | sizeOperations );
+
+ return Vector3( mImpl->mVisualModel->GetNaturalSize() );
+}
+
+float Controller::GetHeightForWidth( float width )
+{
+ // Operations that can be done only once until the text changes.
+ const OperationsMask onlyOnceOperations = static_cast<OperationsMask>( CONVERT_TO_UTF32 |
+ GET_SCRIPTS |
+ VALIDATE_FONTS |
+ GET_LINE_BREAKS |
+ GET_WORD_BREAKS |
+ SHAPE_TEXT |
+ GET_GLYPH_METRICS );
+
+ // Operations that need to be done if the size or the text changes.
+ const OperationsMask sizeOperations = static_cast<OperationsMask>( LAYOUT |
+ REORDER );
+
+ DoRelayout( Size( width, 0.f ),
+ static_cast<OperationsMask>( onlyOnceOperations |
+ sizeOperations ) );
+
+ // Do not do again the only once operations.
+ mImpl->mOperations = static_cast<OperationsMask>( mImpl->mOperations & ~onlyOnceOperations );
+
+ // Do the size related operations again.
+ mImpl->mOperations = static_cast<OperationsMask>( mImpl->mOperations | sizeOperations );
+
+ return mImpl->mVisualModel->GetActualSize().height;
+}
+
View& Controller::GetView()
{
return mImpl->mView;
}
Controller::Controller()
-: mImpl( NULL )
+: mImpl( NULL ),
+ mControlSize()
{
mImpl = new Controller::Impl();
}
projects / platform / core / uifw / dali-toolkit.git / blobdiff