dali-toolkit/internal/text/controller/text-controller-impl-model-updater.cpp

   1 /*
   2  * Copyright (c) 2022 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 // CLASS HEADER
  19 #include <dali-toolkit/internal/text/controller/text-controller-impl-model-updater.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/integration-api/debug.h>
  23
  24 // INTERNAL INCLUDES
  25 #include <dali-toolkit/internal/text/bidirectional-support.h>
  26 #include <dali-toolkit/internal/text/character-set-conversion.h>
  27 #include <dali-toolkit/internal/text/color-segmentation.h>
  28 #include <dali-toolkit/internal/text/hyphenator.h>
  29 #include <dali-toolkit/internal/text/multi-language-support.h>
  30 #include <dali-toolkit/internal/text/segmentation.h>
  31 #include <dali-toolkit/internal/text/shaper.h>
  32 #include <dali-toolkit/internal/text/text-editable-control-interface.h>
  33
  34 namespace Dali::Toolkit::Text
  35 {
  36 namespace
  37 {
  38 #if defined(DEBUG_ENABLED)
  39 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, true, "LOG_TEXT_CONTROLS");
  40 #endif
  41
  42 // The relative luminance of a color is defined as (L = 0.2126 * R + 0.7152 * G + 0.0722 * B)
  43 // based on W3C Recommendations (https://www.w3.org/TR/WCAG20/)
  44 constexpr float         BRIGHTNESS_THRESHOLD = 0.179f;
  45 constexpr float         CONSTANT_R           = 0.2126f;
  46 constexpr float         CONSTANT_G           = 0.7152f;
  47 constexpr float         CONSTANT_B           = 0.0722f;
  48 constexpr Dali::Vector4 BLACK(0.f, 0.f, 0.f, 1.f);
  49 constexpr Dali::Vector4 WHITE(1.f, 1.f, 1.f, 1.f);
  50 constexpr Dali::Vector4 LIGHT_BLUE(0.75f, 0.96f, 1.f, 1.f);
  51 constexpr Dali::Vector4 BACKGROUND_SUB4(0.58f, 0.87f, 0.96f, 1.f);
  52 constexpr Dali::Vector4 BACKGROUND_SUB5(0.83f, 0.94f, 0.98f, 1.f);
  53 constexpr Dali::Vector4 BACKGROUND_SUB6(1.f, 0.5f, 0.5f, 1.f);
  54 constexpr Dali::Vector4 BACKGROUND_SUB7(1.f, 0.8f, 0.8f, 1.f);
  55 } // namespace
  56
  57 bool ControllerImplModelUpdater::Update(Controller::Impl& impl, OperationsMask operationsRequired)
  58 {
  59   DALI_LOG_INFO(gLogFilter, Debug::General, "Controller::UpdateModel\n");
  60
  61   // Calculate the operations to be done.
  62   const OperationsMask operations = static_cast<OperationsMask>(impl.mOperationsPending & operationsRequired);
  63
  64   if(Controller::NO_OPERATION == operations)
  65   {
  66     // Nothing to do if no operations are pending and required.
  67     return false;
  68   }
  69
  70   Vector<Character>& srcCharacters = impl.mModel->mLogicalModel->mText;
  71   Vector<Character>  displayCharacters;
  72   bool               useHiddenText = false;
  73   if(impl.mHiddenInput && impl.mEventData != nullptr)
  74   {
  75     if(impl.mEventData->mIsShowingPlaceholderText)
  76     {
  77       impl.mHiddenInput->InitPreviousTextCount();
  78     }
  79     else
  80     {
  81       impl.mHiddenInput->Substitute(srcCharacters, displayCharacters, impl.mEventData->mPrimaryCursorPosition);
  82       useHiddenText = true;
  83     }
  84   }
  85
  86   Vector<Character>& utf32Characters    = useHiddenText ? displayCharacters : srcCharacters;
  87   const Length       numberOfCharacters = utf32Characters.Count();
  88
  89   // Index to the first character of the first paragraph to be updated.
  90   CharacterIndex startIndex = 0u;
  91   // Number of characters of the paragraphs to be removed.
  92   Length paragraphCharacters = 0u;
  93
  94   impl.CalculateTextUpdateIndices(paragraphCharacters);
  95
  96   // Check whether the indices for updating the text is valid
  97   if(numberOfCharacters > 0u &&
  98      (impl.mTextUpdateInfo.mParagraphCharacterIndex > numberOfCharacters ||
  99       impl.mTextUpdateInfo.mRequestedNumberOfCharacters > numberOfCharacters))
 100   {
 101     std::string currentText;
 102     Utf32ToUtf8(impl.mModel->mLogicalModel->mText.Begin(), numberOfCharacters, currentText);
 103
 104     DALI_LOG_ERROR("Controller::Impl::UpdateModel: mTextUpdateInfo has invalid indices\n");
 105     DALI_LOG_ERROR("Number of characters: %d, current text is: %s\n", numberOfCharacters, currentText.c_str());
 106
 107     // Dump mTextUpdateInfo
 108     DALI_LOG_ERROR("Dump mTextUpdateInfo:\n");
 109     DALI_LOG_ERROR("     mTextUpdateInfo.mCharacterIndex = %u\n", impl.mTextUpdateInfo.mCharacterIndex);
 110     DALI_LOG_ERROR("     mTextUpdateInfo.mNumberOfCharactersToRemove = %u\n", impl.mTextUpdateInfo.mNumberOfCharactersToRemove);
 111     DALI_LOG_ERROR("     mTextUpdateInfo.mNumberOfCharactersToAdd = %u\n", impl.mTextUpdateInfo.mNumberOfCharactersToAdd);
 112     DALI_LOG_ERROR("     mTextUpdateInfo.mPreviousNumberOfCharacters = %u\n", impl.mTextUpdateInfo.mPreviousNumberOfCharacters);
 113     DALI_LOG_ERROR("     mTextUpdateInfo.mParagraphCharacterIndex = %u\n", impl.mTextUpdateInfo.mParagraphCharacterIndex);
 114     DALI_LOG_ERROR("     mTextUpdateInfo.mRequestedNumberOfCharacters = %u\n", impl.mTextUpdateInfo.mRequestedNumberOfCharacters);
 115     DALI_LOG_ERROR("     mTextUpdateInfo.mStartGlyphIndex = %u\n", impl.mTextUpdateInfo.mStartGlyphIndex);
 116     DALI_LOG_ERROR("     mTextUpdateInfo.mStartLineIndex = %u\n", impl.mTextUpdateInfo.mStartLineIndex);
 117     DALI_LOG_ERROR("     mTextUpdateInfo.mEstimatedNumberOfLines = %u\n", impl.mTextUpdateInfo.mEstimatedNumberOfLines);
 118     DALI_LOG_ERROR("     mTextUpdateInfo.mClearAll = %d\n", impl.mTextUpdateInfo.mClearAll);
 119     DALI_LOG_ERROR("     mTextUpdateInfo.mFullRelayoutNeeded = %d\n", impl.mTextUpdateInfo.mFullRelayoutNeeded);
 120     DALI_LOG_ERROR("     mTextUpdateInfo.mIsLastCharacterNewParagraph = %d\n", impl.mTextUpdateInfo.mIsLastCharacterNewParagraph);
 121
 122     return false;
 123   }
 124
 125   startIndex = impl.mTextUpdateInfo.mParagraphCharacterIndex;
 126
 127   if(impl.mTextUpdateInfo.mClearAll ||
 128      (0u != paragraphCharacters))
 129   {
 130     impl.ClearModelData(startIndex, startIndex + ((paragraphCharacters > 0u) ? paragraphCharacters - 1u : 0u), operations);
 131   }
 132
 133   impl.mTextUpdateInfo.mClearAll = false;
 134
 135   // Whether the model is updated.
 136   bool updated = false;
 137
 138   Vector<LineBreakInfo>& lineBreakInfo               = impl.mModel->mLogicalModel->mLineBreakInfo;
 139   const Length           requestedNumberOfCharacters = impl.mTextUpdateInfo.mRequestedNumberOfCharacters;
 140
 141   if(Controller::NO_OPERATION != (Controller::GET_LINE_BREAKS & operations))
 142   {
 143     // Retrieves the line break info. The line break info is used to split the text in 'paragraphs' to
 144     // calculate the bidirectional info for each 'paragraph'.
 145     // It's also used to layout the text (where it should be a new line) or to shape the text (text in different lines
 146     // is not shaped together).
 147     lineBreakInfo.Resize(numberOfCharacters, TextAbstraction::LINE_NO_BREAK);
 148
 149     SetLineBreakInfo(utf32Characters,
 150                      startIndex,
 151                      requestedNumberOfCharacters,
 152                      lineBreakInfo);
 153
 154     if(impl.mModel->mLineWrapMode == ((Text::LineWrap::Mode)DevelText::LineWrap::HYPHENATION) ||
 155        impl.mModel->mLineWrapMode == ((Text::LineWrap::Mode)DevelText::LineWrap::MIXED))
 156     {
 157       CharacterIndex end                 = startIndex + requestedNumberOfCharacters;
 158       LineBreakInfo* lineBreakInfoBuffer = lineBreakInfo.Begin();
 159
 160       for(CharacterIndex index = startIndex; index < end; index++)
 161       {
 162         CharacterIndex wordEnd = index;
 163         while((*(lineBreakInfoBuffer + wordEnd) != TextAbstraction::LINE_ALLOW_BREAK) && (*(lineBreakInfoBuffer + wordEnd) != TextAbstraction::LINE_MUST_BREAK))
 164         {
 165           wordEnd++;
 166         }
 167
 168         if((wordEnd + 1) == end) // add last char
 169         {
 170           wordEnd++;
 171         }
 172
 173         Vector<bool> hyphens = GetWordHyphens(utf32Characters.Begin() + index, wordEnd - index, nullptr);
 174
 175         for(CharacterIndex i = 0; i < (wordEnd - index); i++)
 176         {
 177           if(hyphens[i])
 178           {
 179             *(lineBreakInfoBuffer + index + i) = TextAbstraction::LINE_HYPHENATION_BREAK;
 180           }
 181         }
 182
 183         index = wordEnd;
 184       }
 185     }
 186
 187     // Create the paragraph info.
 188     impl.mModel->mLogicalModel->CreateParagraphInfo(startIndex,
 189                                                     requestedNumberOfCharacters);
 190     updated = true;
 191   }
 192
 193   const bool getScripts    = Controller::NO_OPERATION != (Controller::GET_SCRIPTS & operations);
 194   const bool validateFonts = Controller::NO_OPERATION != (Controller::VALIDATE_FONTS & operations);
 195
 196   Vector<ScriptRun>& scripts    = impl.mModel->mLogicalModel->mScriptRuns;
 197   Vector<FontRun>&   validFonts = impl.mModel->mLogicalModel->mFontRuns;
 198
 199   if(getScripts || validateFonts)
 200   {
 201     // Validates the fonts assigned by the application or assigns default ones.
 202     // It makes sure all the characters are going to be rendered by the correct font.
 203     MultilanguageSupport multilanguageSupport = MultilanguageSupport::Get();
 204
 205     if(getScripts)
 206     {
 207       // Retrieves the scripts used in the text.
 208       multilanguageSupport.SetScripts(utf32Characters,
 209                                       startIndex,
 210                                       requestedNumberOfCharacters,
 211                                       scripts);
 212     }
 213
 214     if(validateFonts)
 215     {
 216       // Validate the fonts set through the mark-up string.
 217       Vector<FontDescriptionRun>& fontDescriptionRuns = impl.mModel->mLogicalModel->mFontDescriptionRuns;
 218
 219       // Get the default font's description.
 220       TextAbstraction::FontDescription defaultFontDescription;
 221       TextAbstraction::PointSize26Dot6 defaultPointSize = TextAbstraction::FontClient::DEFAULT_POINT_SIZE * impl.GetFontSizeScale();
 222
 223       //Get the number of points per one unit of point-size
 224       uint32_t numberOfPointsPerOneUnitOfPointSize = impl.mFontClient.GetNumberOfPointsPerOneUnitOfPointSize();
 225
 226       if(impl.IsShowingPlaceholderText() && impl.mEventData && (nullptr != impl.mEventData->mPlaceholderFont))
 227       {
 228         // If the placeholder font is set specifically, only placeholder font is changed.
 229         defaultFontDescription = impl.mEventData->mPlaceholderFont->mFontDescription;
 230         if(impl.mEventData->mPlaceholderFont->sizeDefined)
 231         {
 232           defaultPointSize = impl.mEventData->mPlaceholderFont->mDefaultPointSize * impl.GetFontSizeScale() * numberOfPointsPerOneUnitOfPointSize;
 233         }
 234       }
 235       else if(nullptr != impl.mFontDefaults)
 236       {
 237         // Set the normal font and the placeholder font.
 238         defaultFontDescription = impl.mFontDefaults->mFontDescription;
 239
 240         if(impl.mTextFitEnabled)
 241         {
 242           defaultPointSize = impl.mFontDefaults->mFitPointSize * numberOfPointsPerOneUnitOfPointSize;
 243         }
 244         else
 245         {
 246           defaultPointSize = impl.mFontDefaults->mDefaultPointSize * impl.GetFontSizeScale() * numberOfPointsPerOneUnitOfPointSize;
 247         }
 248       }
 249
 250       // Validates the fonts. If there is a character with no assigned font it sets a default one.
 251       // After this call, fonts are validated.
 252       multilanguageSupport.ValidateFonts(utf32Characters,
 253                                          scripts,
 254                                          fontDescriptionRuns,
 255                                          defaultFontDescription,
 256                                          defaultPointSize,
 257                                          startIndex,
 258                                          requestedNumberOfCharacters,
 259                                          validFonts);
 260     }
 261     updated = true;
 262   }
 263
 264   Vector<Character> mirroredUtf32Characters;
 265   bool              textMirrored       = false;
 266   const Length      numberOfParagraphs = impl.mModel->mLogicalModel->mParagraphInfo.Count();
 267   if(Controller::NO_OPERATION != (Controller::BIDI_INFO & operations))
 268   {
 269     Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo = impl.mModel->mLogicalModel->mBidirectionalParagraphInfo;
 270     bidirectionalInfo.Reserve(numberOfParagraphs);
 271
 272     // Calculates the bidirectional info for the whole paragraph if it contains right to left scripts.
 273     SetBidirectionalInfo(utf32Characters,
 274                          scripts,
 275                          lineBreakInfo,
 276                          startIndex,
 277                          requestedNumberOfCharacters,
 278                          bidirectionalInfo,
 279                          (impl.mModel->mMatchLayoutDirection != DevelText::MatchLayoutDirection::CONTENTS),
 280                          impl.mLayoutDirection);
 281
 282     if(0u != bidirectionalInfo.Count())
 283     {
 284       // Only set the character directions if there is right to left characters.
 285       Vector<CharacterDirection>& directions = impl.mModel->mLogicalModel->mCharacterDirections;
 286       GetCharactersDirection(bidirectionalInfo,
 287                              numberOfCharacters,
 288                              startIndex,
 289                              requestedNumberOfCharacters,
 290                              directions);
 291
 292       // This paragraph has right to left text. Some characters may need to be mirrored.
 293       // TODO: consider if the mirrored string can be stored as well.
 294
 295       textMirrored = GetMirroredText(utf32Characters,
 296                                      directions,
 297                                      bidirectionalInfo,
 298                                      startIndex,
 299                                      requestedNumberOfCharacters,
 300                                      mirroredUtf32Characters);
 301     }
 302     else
 303     {
 304       // There is no right to left characters. Clear the directions vector.
 305       impl.mModel->mLogicalModel->mCharacterDirections.Clear();
 306     }
 307     updated = true;
 308   }
 309
 310   Vector<GlyphInfo>&      glyphs                = impl.mModel->mVisualModel->mGlyphs;
 311   Vector<CharacterIndex>& glyphsToCharactersMap = impl.mModel->mVisualModel->mGlyphsToCharacters;
 312   Vector<Length>&         charactersPerGlyph    = impl.mModel->mVisualModel->mCharactersPerGlyph;
 313   Vector<GlyphIndex>      newParagraphGlyphs;
 314   newParagraphGlyphs.Reserve(numberOfParagraphs);
 315
 316   const Length currentNumberOfGlyphs = glyphs.Count();
 317   if(Controller::NO_OPERATION != (Controller::SHAPE_TEXT & operations))
 318   {
 319     const Vector<Character>& textToShape = textMirrored ? mirroredUtf32Characters : utf32Characters;
 320     // Shapes the text.
 321     ShapeText(textToShape,
 322               lineBreakInfo,
 323               scripts,
 324               validFonts,
 325               startIndex,
 326               impl.mTextUpdateInfo.mStartGlyphIndex,
 327               requestedNumberOfCharacters,
 328               glyphs,
 329               glyphsToCharactersMap,
 330               charactersPerGlyph,
 331               newParagraphGlyphs);
 332
 333     // Create the 'number of glyphs' per character and the glyph to character conversion tables.
 334     impl.mModel->mVisualModel->CreateGlyphsPerCharacterTable(startIndex, impl.mTextUpdateInfo.mStartGlyphIndex, requestedNumberOfCharacters);
 335     impl.mModel->mVisualModel->CreateCharacterToGlyphTable(startIndex, impl.mTextUpdateInfo.mStartGlyphIndex, requestedNumberOfCharacters);
 336
 337     updated = true;
 338   }
 339
 340   const Length numberOfGlyphs = static_cast<Length>(glyphs.Count()) - currentNumberOfGlyphs;
 341
 342   if(Controller::NO_OPERATION != (Controller::GET_GLYPH_METRICS & operations))
 343   {
 344     GlyphInfo* glyphsBuffer = glyphs.Begin();
 345     impl.mMetrics->GetGlyphMetrics(glyphsBuffer + impl.mTextUpdateInfo.mStartGlyphIndex, numberOfGlyphs);
 346
 347     // Update the width and advance of all new paragraph characters.
 348     for(Vector<GlyphIndex>::ConstIterator it = newParagraphGlyphs.Begin(), endIt = newParagraphGlyphs.End(); it != endIt; ++it)
 349     {
 350       const GlyphIndex index = *it;
 351       GlyphInfo&       glyph = *(glyphsBuffer + index);
 352
 353       glyph.xBearing = 0.f;
 354       glyph.width    = 0.f;
 355       glyph.advance  = 0.f;
 356     }
 357     updated = true;
 358   }
 359
 360   if((nullptr != impl.mEventData) &&
 361      impl.mEventData->mPreEditFlag &&
 362      (0u != impl.mModel->mVisualModel->mCharactersToGlyph.Count()))
 363   {
 364     Dali::InputMethodContext::PreEditAttributeDataContainer attrs;
 365     impl.mEventData->mInputMethodContext.GetPreeditStyle(attrs);
 366     Dali::InputMethodContext::PreeditStyle type = Dali::InputMethodContext::PreeditStyle::NONE;
 367
 368     // Check the type of preedit and run it.
 369     for(Dali::InputMethodContext::PreEditAttributeDataContainer::Iterator it = attrs.Begin(), endIt = attrs.End(); it != endIt; it++)
 370     {
 371       Dali::InputMethodContext::PreeditAttributeData attrData = *it;
 372       DALI_LOG_INFO(gLogFilter, Debug::General, "Controller::UpdateModel PreeditStyle type : %d  start %d end %d \n", attrData.preeditType, attrData.startIndex, attrData.endIndex);
 373       type = attrData.preeditType;
 374
 375       // Check the number of commit characters for the start position.
 376       unsigned int numberOfCommit  = impl.mEventData->mPrimaryCursorPosition - impl.mEventData->mPreEditLength;
 377       Length       numberOfIndices = attrData.endIndex - attrData.startIndex;
 378
 379       switch(type)
 380       {
 381         case Dali::InputMethodContext::PreeditStyle::UNDERLINE:
 382         {
 383           // Add the underline for the pre-edit text.
 384           UnderlinedGlyphRun underlineRun;
 385           underlineRun.glyphRun.glyphIndex     = attrData.startIndex + numberOfCommit;
 386           underlineRun.glyphRun.numberOfGlyphs = numberOfIndices;
 387           impl.mModel->mVisualModel->mUnderlineRuns.PushBack(underlineRun);
 388
 389           //Mark-up processor case
 390           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 391           {
 392             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 393           }
 394           break;
 395         }
 396         case Dali::InputMethodContext::PreeditStyle::REVERSE:
 397         {
 398           Vector4  textColor = impl.mModel->mVisualModel->GetTextColor();
 399           ColorRun backgroundColorRun;
 400           backgroundColorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 401           backgroundColorRun.characterRun.numberOfCharacters = numberOfIndices;
 402           backgroundColorRun.color                           = textColor;
 403           impl.mModel->mLogicalModel->mBackgroundColorRuns.PushBack(backgroundColorRun);
 404
 405           Vector4 backgroundColor = impl.mModel->mVisualModel->GetBackgroundColor();
 406           if(backgroundColor.a == 0) // There is no text background color.
 407           {
 408             // Try use the control's background color.
 409             if(nullptr != impl.mEditableControlInterface)
 410             {
 411               impl.mEditableControlInterface->GetControlBackgroundColor(backgroundColor);
 412               if(backgroundColor.a == 0) // There is no control background color.
 413               {
 414                 // Determines black or white color according to text color.
 415                 // Based on W3C Recommendations (https://www.w3.org/TR/WCAG20/)
 416                 float L         = CONSTANT_R * textColor.r + CONSTANT_G * textColor.g + CONSTANT_B * textColor.b;
 417                 backgroundColor = L > BRIGHTNESS_THRESHOLD ? BLACK : WHITE;
 418               }
 419             }
 420           }
 421
 422           Vector<ColorRun> colorRuns;
 423           colorRuns.Resize(1u);
 424           ColorRun& colorRun                       = *(colorRuns.Begin());
 425           colorRun.color                           = backgroundColor;
 426           colorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 427           colorRun.characterRun.numberOfCharacters = numberOfIndices;
 428           impl.mModel->mLogicalModel->mColorRuns.PushBack(colorRun);
 429
 430           //Mark-up processor case
 431           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 432           {
 433             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 434           }
 435           break;
 436         }
 437         case Dali::InputMethodContext::PreeditStyle::HIGHLIGHT:
 438         {
 439           ColorRun backgroundColorRun;
 440           backgroundColorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 441           backgroundColorRun.characterRun.numberOfCharacters = numberOfIndices;
 442           backgroundColorRun.color                           = LIGHT_BLUE;
 443           impl.mModel->mLogicalModel->mBackgroundColorRuns.PushBack(backgroundColorRun);
 444
 445           //Mark-up processor case
 446           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 447           {
 448             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 449           }
 450           break;
 451         }
 452         case Dali::InputMethodContext::PreeditStyle::CUSTOM_PLATFORM_STYLE_1:
 453         {
 454           // CUSTOM_PLATFORM_STYLE_1 should be drawn with background and underline together.
 455           ColorRun backgroundColorRun;
 456           backgroundColorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 457           backgroundColorRun.characterRun.numberOfCharacters = numberOfIndices;
 458           backgroundColorRun.color                           = BACKGROUND_SUB4;
 459           impl.mModel->mLogicalModel->mBackgroundColorRuns.PushBack(backgroundColorRun);
 460
 461           UnderlinedGlyphRun underlineRun;
 462           underlineRun.glyphRun.glyphIndex     = attrData.startIndex + numberOfCommit;
 463           underlineRun.glyphRun.numberOfGlyphs = numberOfIndices;
 464           impl.mModel->mVisualModel->mUnderlineRuns.PushBack(underlineRun);
 465
 466           //Mark-up processor case
 467           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 468           {
 469             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 470           }
 471           break;
 472         }
 473         case Dali::InputMethodContext::PreeditStyle::CUSTOM_PLATFORM_STYLE_2:
 474         {
 475           // CUSTOM_PLATFORM_STYLE_2 should be drawn with background and underline together.
 476           ColorRun backgroundColorRun;
 477           backgroundColorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 478           backgroundColorRun.characterRun.numberOfCharacters = numberOfIndices;
 479           backgroundColorRun.color                           = BACKGROUND_SUB5;
 480           impl.mModel->mLogicalModel->mBackgroundColorRuns.PushBack(backgroundColorRun);
 481
 482           UnderlinedGlyphRun underlineRun;
 483           underlineRun.glyphRun.glyphIndex     = attrData.startIndex + numberOfCommit;
 484           underlineRun.glyphRun.numberOfGlyphs = numberOfIndices;
 485           impl.mModel->mVisualModel->mUnderlineRuns.PushBack(underlineRun);
 486
 487           //Mark-up processor case
 488           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 489           {
 490             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 491           }
 492           break;
 493         }
 494         case Dali::InputMethodContext::PreeditStyle::CUSTOM_PLATFORM_STYLE_3:
 495         {
 496           // CUSTOM_PLATFORM_STYLE_3 should be drawn with background and underline together.
 497           ColorRun backgroundColorRun;
 498           backgroundColorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 499           backgroundColorRun.characterRun.numberOfCharacters = numberOfIndices;
 500           backgroundColorRun.color                           = BACKGROUND_SUB6;
 501           impl.mModel->mLogicalModel->mBackgroundColorRuns.PushBack(backgroundColorRun);
 502
 503           UnderlinedGlyphRun underlineRun;
 504           underlineRun.glyphRun.glyphIndex     = attrData.startIndex + numberOfCommit;
 505           underlineRun.glyphRun.numberOfGlyphs = numberOfIndices;
 506           impl.mModel->mVisualModel->mUnderlineRuns.PushBack(underlineRun);
 507
 508           //Mark-up processor case
 509           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 510           {
 511             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 512           }
 513           break;
 514         }
 515         case Dali::InputMethodContext::PreeditStyle::CUSTOM_PLATFORM_STYLE_4:
 516         {
 517           // CUSTOM_PLATFORM_STYLE_4 should be drawn with background and underline together.
 518           ColorRun backgroundColorRun;
 519           backgroundColorRun.characterRun.characterIndex     = attrData.startIndex + numberOfCommit;
 520           backgroundColorRun.characterRun.numberOfCharacters = numberOfIndices;
 521           backgroundColorRun.color                           = BACKGROUND_SUB7;
 522           impl.mModel->mLogicalModel->mBackgroundColorRuns.PushBack(backgroundColorRun);
 523
 524           UnderlinedGlyphRun underlineRun;
 525           underlineRun.glyphRun.glyphIndex     = attrData.startIndex + numberOfCommit;
 526           underlineRun.glyphRun.numberOfGlyphs = numberOfIndices;
 527           impl.mModel->mVisualModel->mUnderlineRuns.PushBack(underlineRun);
 528
 529           //Mark-up processor case
 530           if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 531           {
 532             impl.CopyUnderlinedFromLogicalToVisualModels(false);
 533           }
 534           break;
 535         }
 536         case Dali::InputMethodContext::PreeditStyle::NONE:
 537         default:
 538         {
 539           break;
 540         }
 541       }
 542     }
 543     attrs.Clear();
 544     updated = true;
 545   }
 546
 547   if(Controller::NO_OPERATION != (Controller::COLOR & operations))
 548   {
 549     // Set the color runs in glyphs.
 550     SetColorSegmentationInfo(impl.mModel->mLogicalModel->mColorRuns,
 551                              impl.mModel->mVisualModel->mCharactersToGlyph,
 552                              impl.mModel->mVisualModel->mGlyphsPerCharacter,
 553                              startIndex,
 554                              impl.mTextUpdateInfo.mStartGlyphIndex,
 555                              requestedNumberOfCharacters,
 556                              impl.mModel->mVisualModel->mColors,
 557                              impl.mModel->mVisualModel->mColorIndices);
 558
 559     // Set the background color runs in glyphs.
 560     SetColorSegmentationInfo(impl.mModel->mLogicalModel->mBackgroundColorRuns,
 561                              impl.mModel->mVisualModel->mCharactersToGlyph,
 562                              impl.mModel->mVisualModel->mGlyphsPerCharacter,
 563                              startIndex,
 564                              impl.mTextUpdateInfo.mStartGlyphIndex,
 565                              requestedNumberOfCharacters,
 566                              impl.mModel->mVisualModel->mBackgroundColors,
 567                              impl.mModel->mVisualModel->mBackgroundColorIndices);
 568
 569     updated = true;
 570   }
 571
 572   if((Controller::NO_OPERATION != (Controller::SHAPE_TEXT & operations)) &&
 573      !((nullptr != impl.mEventData) &&
 574        impl.mEventData->mPreEditFlag &&
 575        (0u != impl.mModel->mVisualModel->mCharactersToGlyph.Count())))
 576   {
 577     //Mark-up processor case
 578     if(impl.mModel->mVisualModel->IsMarkupProcessorEnabled())
 579     {
 580       impl.CopyUnderlinedFromLogicalToVisualModels(true);
 581       impl.CopyStrikethroughFromLogicalToVisualModels();
 582       impl.CopyCharacterSpacingFromLogicalToVisualModels();
 583     }
 584
 585     updated = true;
 586   }
 587
 588   // The estimated number of lines. Used to avoid reallocations when layouting.
 589   impl.mTextUpdateInfo.mEstimatedNumberOfLines = std::max(impl.mModel->mVisualModel->mLines.Count(), impl.mModel->mLogicalModel->mParagraphInfo.Count());
 590
 591   // Set the previous number of characters for the next time the text is updated.
 592   impl.mTextUpdateInfo.mPreviousNumberOfCharacters = numberOfCharacters;
 593
 594   return updated;
 595 }
 596
 597 } // namespace Dali::Toolkit::Text