automated-tests/src/dali-toolkit-internal/dali-toolkit-test-utils/toolkit-text-utils.cpp

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // FILE HEADER
  19 #include "toolkit-text-utils.h"
  20
  21 // EXTERNAL INCLUDES
  22 #include <limits>
  23 #include <dali/devel-api/text-abstraction/font-client.h>
  24
  25 // INTERNAL INCLUDES
  26 #include <dali-toolkit/internal/text/bidirectional-support.h>
  27 #include <dali-toolkit/internal/text/character-set-conversion.h>
  28 #include <dali-toolkit/internal/text/layouts/layout-engine.h>
  29 #include <dali-toolkit/internal/text/layouts/layout-parameters.h>
  30 #include <dali-toolkit/internal/text/multi-language-support.h>
  31 #include <dali-toolkit/internal/text/segmentation.h>
  32 #include <dali-toolkit/internal/text/shaper.h>
  33 #include <dali-toolkit/internal/text/text-controller-impl.h>
  34 #include <dali-toolkit/internal/text/markup-processor.h>
  35 #include <dali-toolkit/internal/text/hyphenator.h>
  36
  37 namespace Dali
  38 {
  39
  40 namespace Toolkit
  41 {
  42
  43 namespace Text
  44 {
  45
  46 /**
  47  * @brief Frees previously allocated bidirectional resources.
  48  *
  49  * @param[in] bidirectionalLineInfo Bidirectional info per line.
  50  * @param[in] index Index to the first line with bidirectional info to be freed.
  51  */
  52 void FreeBidirectionalLineInfoResources( Vector<BidirectionalLineInfoRun> bidirectionalLineInfo,
  53                                          uint32_t index )
  54 {
  55   // Free the allocated memory used to store the conversion table in the bidirectional line info run.
  56   for( Vector<BidirectionalLineInfoRun>::Iterator it = bidirectionalLineInfo.Begin() + index,
  57          endIt = bidirectionalLineInfo.End();
  58        it != endIt;
  59        ++it )
  60   {
  61     BidirectionalLineInfoRun& bidiLineInfo = *it;
  62
  63     free( bidiLineInfo.visualToLogicalMap );
  64   }
  65 }
  66
  67 /**
  68  * @brief Clear all the model data except for LogicalModel::mText.
  69  *
  70  * @param[in] characterIndex Clear data starting from the index.
  71  */
  72 void ClearModelData( CharacterIndex characterIndex,
  73                      LogicalModelPtr logicalModel,
  74                      VisualModelPtr visualModel )
  75 {
  76   // n.b. This does not Clear the mText from mLogicalModel
  77
  78   // Frees previously allocated resources.
  79   FreeBidirectionalLineInfoResources( logicalModel->mBidirectionalLineInfo, 0u );
  80
  81   logicalModel->mScriptRuns.Clear();
  82   logicalModel->mFontRuns.Clear();
  83   logicalModel->mBidirectionalParagraphInfo.Clear();
  84   logicalModel->mCharacterDirections.Clear();
  85   logicalModel->mBidirectionalLineInfo.Clear();
  86   visualModel->mGlyphs.Clear();
  87   visualModel->mGlyphsToCharacters.Clear();
  88   visualModel->mCharactersToGlyph.Clear();
  89   visualModel->mCharactersPerGlyph.Clear();
  90   visualModel->mGlyphsPerCharacter.Clear();
  91   visualModel->mGlyphPositions.Clear();
  92   visualModel->mLines.Clear();
  93
  94   visualModel->ClearCaches();
  95 }
  96
  97 void CreateTextModel( const std::string& text,
  98                       const Size& textArea,
  99                       const Vector<FontDescriptionRun>& fontDescriptions,
 100                       const LayoutOptions& options,
 101                       Size& layoutSize,
 102                       ModelPtr& textModel,
 103                       MetricsPtr& metrics,
 104                       bool markupProcessorEnabled,
 105                       LineWrap::Mode wrapMode )
 106 {
 107   textModel = Model::New(); ///< Pointer to the text's model.
 108   LogicalModelPtr logicalModel = textModel->mLogicalModel;
 109   VisualModelPtr visualModel = textModel->mVisualModel;
 110
 111   MarkupProcessData markupProcessData( logicalModel->mColorRuns,
 112                                        logicalModel->mFontDescriptionRuns,
 113                                        logicalModel->mEmbeddedItems,
 114                                        logicalModel->mAnchors,
 115                                        logicalModel->mUnderlinedCharacterRuns,
 116                                        logicalModel->mBackgroundColorRuns);
 117
 118   Length textSize = 0u;
 119   const uint8_t* utf8 = NULL;
 120   if( markupProcessorEnabled )
 121   {
 122     ProcessMarkupString( text, markupProcessData );
 123     textSize = markupProcessData.markupProcessedText.size();
 124
 125     // This is a bit horrible but std::string returns a (signed) char*
 126     utf8 = reinterpret_cast<const uint8_t*>( markupProcessData.markupProcessedText.c_str() );
 127   }
 128   else
 129   {
 130     textSize = text.size();
 131
 132     // This is a bit horrible but std::string returns a (signed) char*
 133     utf8 = reinterpret_cast<const uint8_t*>( text.c_str() );
 134   }
 135
 136   // 1) Convert to utf32
 137   Vector<Character>& utf32Characters = logicalModel->mText;
 138   utf32Characters.Resize( textSize );
 139
 140   // Transform a text array encoded in utf8 into an array encoded in utf32.
 141   // It returns the actual number of characters.
 142   Length characterCount = Utf8ToUtf32( utf8, textSize, utf32Characters.Begin() );
 143   utf32Characters.Resize( characterCount );
 144
 145   // 2) Set the break and paragraph info.
 146   Vector<LineBreakInfo>& lineBreakInfo = logicalModel->mLineBreakInfo;
 147   lineBreakInfo.Resize( characterCount );
 148
 149   SetLineBreakInfo( utf32Characters,
 150                     0u,
 151                     characterCount,
 152                     lineBreakInfo );
 153
 154   if( 0u == characterCount )
 155   {
 156     // Nothing else to do if the number of characters is zero.
 157     return;
 158   }
 159
 160   textModel->mLineWrapMode = wrapMode;
 161
 162   if(textModel->mLineWrapMode == ((Text::LineWrap::Mode)DevelText::LineWrap::HYPHENATION) ||
 163        textModel->mLineWrapMode == ((Text::LineWrap::Mode)DevelText::LineWrap::MIXED))
 164   {
 165     CharacterIndex end                 = characterCount;
 166     LineBreakInfo* lineBreakInfoBuffer = lineBreakInfo.Begin();
 167
 168     for(CharacterIndex index = 0; index < end; index++)
 169     {
 170       CharacterIndex wordEnd = index;
 171       while((*(lineBreakInfoBuffer + wordEnd) != TextAbstraction::LINE_ALLOW_BREAK) && (*(lineBreakInfoBuffer + wordEnd) != TextAbstraction::LINE_MUST_BREAK))
 172       {
 173         wordEnd++;
 174       }
 175
 176       if((wordEnd + 1) == end) // add last char
 177       {
 178         wordEnd++;
 179       }
 180
 181       Vector<bool> hyphens = GetWordHyphens(utf32Characters.Begin() + index, wordEnd - index, nullptr);
 182
 183       for(CharacterIndex i = 0; i < (wordEnd - index); i++)
 184       {
 185         if(hyphens[i])
 186         {
 187           *(lineBreakInfoBuffer + index + i) = TextAbstraction::LINE_HYPHENATION_BREAK;
 188         }
 189       }
 190
 191       index = wordEnd;
 192     }
 193   }
 194
 195   // 3) Set the script info.
 196   MultilanguageSupport multilanguageSupport = MultilanguageSupport::Get();
 197
 198   Vector<ScriptRun>& scripts = logicalModel->mScriptRuns;
 199   multilanguageSupport.SetScripts( utf32Characters,
 200                                    0u,
 201                                    characterCount,
 202                                    scripts );
 203
 204   // 4) Set the font info
 205   Vector<FontDescriptionRun>& fontDescriptionRuns = logicalModel->mFontDescriptionRuns;
 206   fontDescriptionRuns = fontDescriptions;
 207   Vector<FontRun>& validFonts = logicalModel->mFontRuns;
 208
 209   // The default font description.
 210   TextAbstraction::FontDescription fontDescription;
 211
 212   TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
 213   fontClient.SetDpi( 96u, 96u );
 214
 215   // Validates the fonts. If there is a character with no assigned font it sets a default one.
 216   // After this call, fonts are validated.
 217   multilanguageSupport.ValidateFonts( utf32Characters,
 218                                       scripts,
 219                                       fontDescriptionRuns,
 220                                       fontDescription,
 221                                       TextAbstraction::FontClient::DEFAULT_POINT_SIZE,
 222                                       0u,
 223                                       characterCount,
 224                                       validFonts );
 225
 226   // 5) Set the bidirectional info per paragraph.
 227   Vector<Character> mirroredUtf32Characters;
 228   bool textMirrored = false;
 229
 230   // Reserve some space for the vector of paragraph's bidirectional info.
 231   Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo = logicalModel->mBidirectionalParagraphInfo;
 232
 233   // Calculates the bidirectional info for the whole paragraph if it contains right to left scripts.
 234   SetBidirectionalInfo( utf32Characters,
 235                         scripts,
 236                         lineBreakInfo,
 237                         0u,
 238                         characterCount,
 239                         bidirectionalInfo );
 240
 241   // Create the paragraph info.
 242   logicalModel->CreateParagraphInfo( 0u,
 243                                      characterCount );
 244
 245   // 6) Set character directions.
 246   Vector<CharacterDirection>& characterDirections = logicalModel->mCharacterDirections;
 247   if( 0u != bidirectionalInfo.Count() )
 248   {
 249     // Only set the character directions if there is right to left characters.
 250     GetCharactersDirection( bidirectionalInfo,
 251                             characterCount,
 252                             0u,
 253                             characterCount,
 254                             characterDirections );
 255
 256
 257     // This paragraph has right to left text. Some characters may need to be mirrored.
 258     textMirrored = GetMirroredText( utf32Characters,
 259                                     characterDirections,
 260                                     bidirectionalInfo,
 261                                     0u,
 262                                     characterCount,
 263                                     mirroredUtf32Characters );
 264   }
 265   else
 266   {
 267     // There is no right to left characters. Clear the directions vector.
 268     characterDirections.Clear();
 269   }
 270
 271   // 7) Shape the text.
 272
 273   Vector<GlyphInfo>& glyphs = visualModel->mGlyphs;
 274   Vector<CharacterIndex>& glyphsToCharactersMap = visualModel->mGlyphsToCharacters;
 275   Vector<Length>& charactersPerGlyph = visualModel->mCharactersPerGlyph;
 276   Vector<GlyphIndex> newParagraphGlyphs;
 277
 278   const Vector<Character>& textToShape = textMirrored ? mirroredUtf32Characters : utf32Characters;
 279
 280   ShapeText( textToShape,
 281              lineBreakInfo,
 282              scripts,
 283              validFonts,
 284              0u,
 285              0u,
 286              characterCount,
 287              glyphs,
 288              glyphsToCharactersMap,
 289              charactersPerGlyph,
 290              newParagraphGlyphs );
 291
 292   // Create the 'number of glyphs' per character and the glyph to character conversion tables.
 293   visualModel->CreateGlyphsPerCharacterTable( 0u, 0u, characterCount );
 294   visualModel->CreateCharacterToGlyphTable( 0u, 0u, characterCount );
 295
 296   const Length numberOfGlyphs = glyphs.Count();
 297
 298   // 8) Get the glyph metrics
 299   metrics = Metrics::New( fontClient );
 300
 301   GlyphInfo* glyphsBuffer = glyphs.Begin();
 302   metrics->GetGlyphMetrics( glyphsBuffer, numberOfGlyphs );
 303
 304   // Update the width and advance of all new paragraph characters.
 305   for( Vector<GlyphIndex>::ConstIterator it = newParagraphGlyphs.Begin(),
 306          endIt = newParagraphGlyphs.End();
 307        it != endIt;
 308        ++it )
 309   {
 310     const GlyphIndex index = *it;
 311     GlyphInfo& glyph = *( glyphsBuffer + index );
 312
 313     glyph.xBearing = 0.f;
 314     glyph.width = 0.f;
 315     glyph.advance = 0.f;
 316   }
 317
 318   // 9) Layout the text
 319   Layout::Engine layoutEngine;
 320   layoutEngine.SetMetrics( metrics );
 321   layoutEngine.SetLayout( Layout::Engine::MULTI_LINE_BOX );
 322
 323   // Set the layout parameters.
 324   textModel->mHorizontalAlignment = Text::HorizontalAlignment::BEGIN;
 325   textModel->mIgnoreSpacesAfterText = true;
 326   Layout::Parameters layoutParameters( textArea,
 327                                        textModel );
 328
 329   Vector<LineRun>& lines = visualModel->mLines;
 330
 331   Vector<Vector2>& glyphPositions = visualModel->mGlyphPositions;
 332   glyphPositions.Resize( numberOfGlyphs );
 333
 334   layoutParameters.isLastNewParagraph = TextAbstraction::IsNewParagraph( *( utf32Characters.Begin() + ( characterCount - 1u ) ) );
 335
 336   // The initial glyph and the number of glyphs to layout.
 337   layoutParameters.startGlyphIndex = 0u;
 338   layoutParameters.numberOfGlyphs = numberOfGlyphs;
 339   layoutParameters.startLineIndex = 0u;
 340   layoutParameters.estimatedNumberOfLines = logicalModel->mParagraphInfo.Count();
 341
 342   bool isAutoScroll = false;
 343   layoutEngine.LayoutText( layoutParameters,
 344                            layoutSize,
 345                            false,
 346                            isAutoScroll );
 347
 348   if( options.align )
 349   {
 350     float alignmentOffset = 0.f;
 351     layoutEngine.Align( textArea,
 352                         0u,
 353                         characterCount,
 354                         Text::HorizontalAlignment::BEGIN,
 355                         lines,
 356                         alignmentOffset,
 357                         Dali::LayoutDirection::LEFT_TO_RIGHT,
 358                         false );
 359   }
 360 }
 361
 362 void ConfigureTextLabel( ControllerPtr controller )
 363 {
 364   TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
 365   fontClient.SetDpi( 93u, 93u );
 366
 367   // Set the text layout as multi-line.
 368   controller->GetLayoutEngine().SetLayout( Layout::Engine::MULTI_LINE_BOX );
 369
 370   // Set cursor's width to zero.
 371   controller->GetLayoutEngine().SetCursorWidth( 0 );
 372
 373   InputMethodContext inputMethodContext = InputMethodContext::New();
 374   // Disables the text input.
 375   controller->EnableTextInput( NULL, inputMethodContext );
 376
 377   // Disables the vertical scrolling.
 378   controller->SetVerticalScrollEnabled( false );
 379
 380   // Disables the horizontal scrolling.
 381   controller->SetHorizontalScrollEnabled( false );
 382
 383   // Enable the text elide.
 384   controller->SetTextElideEnabled( true );
 385
 386   // Disable match system language direction
 387   controller->SetMatchLayoutDirection(DevelText::MatchLayoutDirection::CONTENTS);
 388 }
 389
 390 void ConfigureTextField( ControllerPtr controller )
 391 {
 392   TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
 393   fontClient.SetDpi( 93u, 93u );
 394
 395   // Creates a decorator.
 396   Text::DecoratorPtr decorator = Text::Decorator::New( *controller,
 397                                                        *controller );
 398
 399   // Set the text layout as multi-line.
 400   controller->GetLayoutEngine().SetLayout( Layout::Engine::SINGLE_LINE_BOX );
 401
 402   InputMethodContext inputMethodContext = InputMethodContext::New();
 403   // Enables the text input.
 404   controller->EnableTextInput( decorator, inputMethodContext );
 405
 406   // Enables the vertical scrolling after the text input has been enabled.
 407   controller->SetVerticalScrollEnabled( false );
 408
 409   // Disables the horizontal scrolling.
 410   controller->SetHorizontalScrollEnabled( true );
 411
 412   // No maximum number of characters.
 413   controller->SetMaximumNumberOfCharacters( 50u );
 414
 415   // Disable the text elide.
 416   controller->SetTextElideEnabled( false );
 417
 418   // Disable match system language direction
 419   controller->SetMatchLayoutDirection(DevelText::MatchLayoutDirection::CONTENTS);
 420 }
 421
 422 void ConfigureTextEditor( ControllerPtr controller )
 423 {
 424   TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
 425   fontClient.SetDpi( 93u, 93u );
 426
 427   // Creates a decorator.
 428   Text::DecoratorPtr decorator = Text::Decorator::New( *controller,
 429                                                        *controller );
 430
 431   // Set the text layout as multi-line.
 432   controller->GetLayoutEngine().SetLayout( Layout::Engine::MULTI_LINE_BOX );
 433
 434   InputMethodContext inputMethodContext = InputMethodContext::New();
 435   // Enables the text input.
 436   controller->EnableTextInput( decorator, inputMethodContext );
 437
 438   // Enables the vertical scrolling after the text input has been enabled.
 439   controller->SetVerticalScrollEnabled( true );
 440
 441   // Disables the horizontal scrolling.
 442   controller->SetHorizontalScrollEnabled( false );
 443
 444   // No maximum number of characters.
 445   controller->SetMaximumNumberOfCharacters( std::numeric_limits<Length>::max() );
 446
 447   // Disable the text elide.
 448   controller->SetTextElideEnabled( false );
 449
 450   // Disable match system language direction
 451   controller->SetMatchLayoutDirection(DevelText::MatchLayoutDirection::CONTENTS);
 452 }
 453
 454 } // namespace Text
 455
 456 } // namespace Toolkit
 457
 458 } // namespace Dali