dali-toolkit/internal/controls/text-controls/text-label-impl.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 // CLASS HEADER
  19 #include <dali-toolkit/internal/controls/text-controls/text-label-impl.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/devel-api/actors/actor-devel.h>
  23 #include <dali/devel-api/adaptor-framework/image-loading.h>
  24 #include <dali/devel-api/common/stage.h>
  25 #include <dali/devel-api/object/property-helper-devel.h>
  26 #include <dali/integration-api/debug.h>
  27 #include <dali/public-api/common/dali-common.h>
  28 #include <dali/public-api/object/type-registry-helper.h>
  29
  30 // INTERNAL INCLUDES
  31 #include <dali-toolkit/devel-api/controls/control-depth-index-ranges.h>
  32 #include <dali-toolkit/devel-api/text/rendering-backend.h>
  33 #include <dali-toolkit/internal/styling/style-manager-impl.h>
  34 #include <dali-toolkit/internal/text/property-string-parser.h>
  35 #include <dali-toolkit/internal/text/rendering/text-backend.h>
  36 #include <dali-toolkit/internal/text/text-definitions.h>
  37 #include <dali-toolkit/internal/text/text-effects-style.h>
  38 #include <dali-toolkit/internal/text/text-font-style.h>
  39 #include <dali-toolkit/internal/text/text-view.h>
  40 #include <dali-toolkit/public-api/text/text-enumerations.h>
  41
  42 #include <dali-toolkit/devel-api/controls/control-devel.h>
  43 #include <dali-toolkit/devel-api/visual-factory/visual-base.h>
  44 #include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
  45 #include <dali-toolkit/internal/text/text-enumerations-impl.h>
  46 #include <dali-toolkit/public-api/align-enumerations.h>
  47 #include <dali-toolkit/public-api/visuals/text-visual-properties.h>
  48 #include <dali-toolkit/public-api/visuals/visual-properties.h>
  49
  50 // DEVEL INCLUDES
  51 #include <dali-toolkit/devel-api/controls/text-controls/text-label-devel.h>
  52
  53 using namespace Dali::Toolkit::Text;
  54
  55 namespace Dali
  56 {
  57 namespace Toolkit
  58 {
  59 namespace Internal
  60 {
  61 namespace
  62 {
  63 const unsigned int DEFAULT_RENDERING_BACKEND = Dali::Toolkit::DevelText::DEFAULT_RENDERING_BACKEND;
  64
  65 /**
  66  * @brief How the text visual should be aligned vertically inside the control.
  67  *
  68  * 0.0f aligns the text to the top, 0.5f aligns the text to the center, 1.0f aligns the text to the bottom.
  69  * The alignment depends on the alignment value of the text label (Use Text::VerticalAlignment enumerations).
  70  */
  71 const float VERTICAL_ALIGNMENT_TABLE[Text::VerticalAlignment::BOTTOM + 1] =
  72   {
  73     0.0f, // VerticalAlignment::TOP
  74     0.5f, // VerticalAlignment::CENTER
  75     1.0f  // VerticalAlignment::BOTTOM
  76 };
  77
  78 const std::string TEXT_FIT_ENABLE_KEY("enable");
  79 const std::string TEXT_FIT_MIN_SIZE_KEY("minSize");
  80 const std::string TEXT_FIT_MAX_SIZE_KEY("maxSize");
  81 const std::string TEXT_FIT_STEP_SIZE_KEY("stepSize");
  82 const std::string TEXT_FIT_FONT_SIZE_TYPE_KEY("fontSizeType");
  83
  84 #if defined(DEBUG_ENABLED)
  85 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, true, "LOG_TEXT_CONTROLS");
  86 #endif
  87
  88 const Scripting::StringEnum AUTO_SCROLL_STOP_MODE_TABLE[] =
  89   {
  90     {"IMMEDIATE", Toolkit::TextLabel::AutoScrollStopMode::IMMEDIATE},
  91     {"FINISH_LOOP", Toolkit::TextLabel::AutoScrollStopMode::FINISH_LOOP},
  92 };
  93 const unsigned int AUTO_SCROLL_STOP_MODE_TABLE_COUNT = sizeof(AUTO_SCROLL_STOP_MODE_TABLE) / sizeof(AUTO_SCROLL_STOP_MODE_TABLE[0]);
  94
  95 // Type registration
  96 BaseHandle Create()
  97 {
  98   return Toolkit::TextLabel::New();
  99 }
 100
 101 // clang-format off
 102 // Setup properties, signals and actions using the type-registry.
 103 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::TextLabel, Toolkit::Control, Create);
 104
 105 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "text",                         STRING,  TEXT                           )
 106 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "fontFamily",                   STRING,  FONT_FAMILY                    )
 107 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "fontStyle",                    MAP,     FONT_STYLE                     )
 108 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "pointSize",                    FLOAT,   POINT_SIZE                     )
 109 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "multiLine",                    BOOLEAN, MULTI_LINE                     )
 110 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "horizontalAlignment",          STRING,  HORIZONTAL_ALIGNMENT           )
 111 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "verticalAlignment",            STRING,  VERTICAL_ALIGNMENT             )
 112 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "enableMarkup",                 BOOLEAN, ENABLE_MARKUP                  )
 113 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "enableAutoScroll",             BOOLEAN, ENABLE_AUTO_SCROLL             )
 114 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "autoScrollSpeed",              INTEGER, AUTO_SCROLL_SPEED              )
 115 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "autoScrollLoopCount",          INTEGER, AUTO_SCROLL_LOOP_COUNT         )
 116 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "autoScrollGap",                FLOAT,   AUTO_SCROLL_GAP                )
 117 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "lineSpacing",                  FLOAT,   LINE_SPACING                   )
 118 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "underline",                    MAP,     UNDERLINE                      )
 119 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "shadow",                       MAP,     SHADOW                         )
 120 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "emboss",                       MAP,     EMBOSS                         )
 121 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "outline",                      MAP,     OUTLINE                        )
 122 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "pixelSize",                    FLOAT,   PIXEL_SIZE                     )
 123 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "ellipsis",                     BOOLEAN, ELLIPSIS                       )
 124 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "autoScrollLoopDelay",          FLOAT,   AUTO_SCROLL_LOOP_DELAY         )
 125 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "autoScrollStopMode",           STRING,  AUTO_SCROLL_STOP_MODE          )
 126 DALI_PROPERTY_REGISTRATION_READ_ONLY(Toolkit,       TextLabel, "lineCount",                    INTEGER, LINE_COUNT                     )
 127 DALI_PROPERTY_REGISTRATION(Toolkit,                 TextLabel, "lineWrapMode",                 INTEGER, LINE_WRAP_MODE                 )
 128 DALI_DEVEL_PROPERTY_REGISTRATION_READ_ONLY(Toolkit, TextLabel, "textDirection",                INTEGER, TEXT_DIRECTION                 )
 129 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "verticalLineAlignment",        INTEGER, VERTICAL_LINE_ALIGNMENT        )
 130 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "textBackground",               MAP,     BACKGROUND                     )
 131 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "ignoreSpacesAfterText",        BOOLEAN, IGNORE_SPACES_AFTER_TEXT       )
 132 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "matchSystemLanguageDirection", BOOLEAN, MATCH_SYSTEM_LANGUAGE_DIRECTION)
 133 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "textFit",                      MAP,     TEXT_FIT                       )
 134 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "minLineSize",                  FLOAT,   MIN_LINE_SIZE                  )
 135 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "renderingBackend",             INTEGER, RENDERING_BACKEND              )
 136 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "fontSizeScale",                FLOAT,   FONT_SIZE_SCALE                )
 137 DALI_DEVEL_PROPERTY_REGISTRATION(Toolkit,           TextLabel, "ellipsisPosition",             INTEGER, ELLIPSIS_POSITION              )
 138
 139 DALI_ANIMATABLE_PROPERTY_REGISTRATION_WITH_DEFAULT(Toolkit, TextLabel, "textColor",      Color::BLACK,     TEXT_COLOR   )
 140 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION(Toolkit,    TextLabel, "textColorRed",   TEXT_COLOR_RED,   TEXT_COLOR, 0)
 141 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION(Toolkit,    TextLabel, "textColorGreen", TEXT_COLOR_GREEN, TEXT_COLOR, 1)
 142 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION(Toolkit,    TextLabel, "textColorBlue",  TEXT_COLOR_BLUE,  TEXT_COLOR, 2)
 143 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION(Toolkit,    TextLabel, "textColorAlpha", TEXT_COLOR_ALPHA, TEXT_COLOR, 3)
 144
 145 DALI_SIGNAL_REGISTRATION(Toolkit, TextLabel, "anchorClicked", SIGNAL_ANCHOR_CLICKED)
 146
 147 DALI_TYPE_REGISTRATION_END()
 148 // clang-format on
 149
 150 /// Parses the property map for the TEXT_FIT property
 151 void ParseTextFitProperty(Text::ControllerPtr& controller, const Property::Map* propertiesMap)
 152 {
 153   if(propertiesMap && !propertiesMap->Empty())
 154   {
 155     bool                     enabled      = false;
 156     float                    minSize      = 0.f;
 157     float                    maxSize      = 0.f;
 158     float                    stepSize     = 0.f;
 159     bool                     isMinSizeSet = false, isMaxSizeSet = false, isStepSizeSet = false;
 160     Controller::FontSizeType type = Controller::FontSizeType::POINT_SIZE;
 161
 162     const unsigned int numberOfItems = propertiesMap->Count();
 163
 164     // Parses and applies
 165     for(unsigned int index = 0u; index < numberOfItems; ++index)
 166     {
 167       const KeyValuePair& valueGet = propertiesMap->GetKeyValue(index);
 168
 169       if((Controller::TextFitInfo::Property::TEXT_FIT_ENABLE == valueGet.first.indexKey) || (TEXT_FIT_ENABLE_KEY == valueGet.first.stringKey))
 170       {
 171         /// Enable key.
 172         enabled = valueGet.second.Get<bool>();
 173       }
 174       else if((Controller::TextFitInfo::Property::TEXT_FIT_MIN_SIZE == valueGet.first.indexKey) || (TEXT_FIT_MIN_SIZE_KEY == valueGet.first.stringKey))
 175       {
 176         /// min size.
 177         minSize      = valueGet.second.Get<float>();
 178         isMinSizeSet = true;
 179       }
 180       else if((Controller::TextFitInfo::Property::TEXT_FIT_MAX_SIZE == valueGet.first.indexKey) || (TEXT_FIT_MAX_SIZE_KEY == valueGet.first.stringKey))
 181       {
 182         /// max size.
 183         maxSize      = valueGet.second.Get<float>();
 184         isMaxSizeSet = true;
 185       }
 186       else if((Controller::TextFitInfo::Property::TEXT_FIT_STEP_SIZE == valueGet.first.indexKey) || (TEXT_FIT_STEP_SIZE_KEY == valueGet.first.stringKey))
 187       {
 188         /// step size.
 189         stepSize      = valueGet.second.Get<float>();
 190         isStepSizeSet = true;
 191       }
 192       else if((Controller::TextFitInfo::Property::TEXT_FIT_FONT_SIZE_TYPE == valueGet.first.indexKey) || (TEXT_FIT_FONT_SIZE_TYPE_KEY == valueGet.first.stringKey))
 193       {
 194         if("pixelSize" == valueGet.second.Get<std::string>())
 195         {
 196           type = Controller::FontSizeType::PIXEL_SIZE;
 197         }
 198       }
 199     }
 200
 201     controller->SetTextFitEnabled(enabled);
 202     if(isMinSizeSet)
 203     {
 204       controller->SetTextFitMinSize(minSize, type);
 205     }
 206     if(isMaxSizeSet)
 207     {
 208       controller->SetTextFitMaxSize(maxSize, type);
 209     }
 210     if(isStepSizeSet)
 211     {
 212       controller->SetTextFitStepSize(stepSize, type);
 213     }
 214   }
 215 }
 216
 217 } // namespace
 218
 219 Toolkit::TextLabel TextLabel::New()
 220 {
 221   // Create the implementation, temporarily owned by this handle on stack
 222   IntrusivePtr<TextLabel> impl = new TextLabel();
 223
 224   // Pass ownership to CustomActor handle
 225   Toolkit::TextLabel handle(*impl);
 226
 227   // Second-phase init of the implementation
 228   // This can only be done after the CustomActor connection has been made...
 229   impl->Initialize();
 230
 231   return handle;
 232 }
 233
 234 void TextLabel::SetProperty(BaseObject* object, Property::Index index, const Property::Value& value)
 235 {
 236   Toolkit::TextLabel label = Toolkit::TextLabel::DownCast(Dali::BaseHandle(object));
 237
 238   if(label)
 239   {
 240     TextLabel& impl(GetImpl(label));
 241     DALI_ASSERT_ALWAYS(impl.mController && "No text contoller");
 242
 243     switch(index)
 244     {
 245       case Toolkit::DevelTextLabel::Property::RENDERING_BACKEND:
 246       {
 247         int backend = value.Get<int>();
 248
 249 #ifndef ENABLE_VECTOR_BASED_TEXT_RENDERING
 250         if(DevelText::RENDERING_VECTOR_BASED == backend)
 251         {
 252           backend = TextAbstraction::BITMAP_GLYPH; // Fallback to bitmap-based rendering
 253         }
 254 #endif
 255         if(impl.mRenderingBackend != backend)
 256         {
 257           impl.mRenderingBackend = backend;
 258           impl.mTextUpdateNeeded = true;
 259
 260           // When using the vector-based rendering, the size of the GLyphs are different
 261           TextAbstraction::GlyphType glyphType = (DevelText::RENDERING_VECTOR_BASED == impl.mRenderingBackend) ? TextAbstraction::VECTOR_GLYPH : TextAbstraction::BITMAP_GLYPH;
 262           impl.mController->SetGlyphType(glyphType);
 263         }
 264         break;
 265       }
 266       case Toolkit::TextLabel::Property::TEXT:
 267       {
 268         impl.mController->SetText(value.Get<std::string>());
 269
 270         if(impl.mController->HasAnchors())
 271         {
 272           // Forward input events to controller
 273           impl.EnableGestureDetection(static_cast<GestureType::Value>(GestureType::TAP));
 274         }
 275         else
 276         {
 277           impl.DisableGestureDetection(static_cast<GestureType::Value>(GestureType::TAP));
 278         }
 279
 280         break;
 281       }
 282       case Toolkit::TextLabel::Property::FONT_FAMILY:
 283       {
 284         const std::string& fontFamily = value.Get<std::string>();
 285
 286         DALI_LOG_INFO(gLogFilter, Debug::Verbose, "TextLabel::SetProperty Property::FONT_FAMILY newFont(%s)\n", fontFamily.c_str());
 287         impl.mController->SetDefaultFontFamily(fontFamily);
 288         break;
 289       }
 290       case Toolkit::TextLabel::Property::FONT_STYLE:
 291       {
 292         SetFontStyleProperty(impl.mController, value, Text::FontStyle::DEFAULT);
 293         break;
 294       }
 295       case Toolkit::TextLabel::Property::POINT_SIZE:
 296       {
 297         const float pointSize = value.Get<float>();
 298
 299         if(!Equals(impl.mController->GetDefaultFontSize(Text::Controller::POINT_SIZE), pointSize))
 300         {
 301           impl.mController->SetDefaultFontSize(pointSize, Text::Controller::POINT_SIZE);
 302         }
 303         break;
 304       }
 305       case Toolkit::TextLabel::Property::MULTI_LINE:
 306       {
 307         impl.mController->SetMultiLineEnabled(value.Get<bool>());
 308         break;
 309       }
 310       case Toolkit::TextLabel::Property::HORIZONTAL_ALIGNMENT:
 311       {
 312         Text::HorizontalAlignment::Type alignment(static_cast<Text::HorizontalAlignment::Type>(-1)); // Set to invalid value to ensure a valid mode does get set
 313         if(Text::GetHorizontalAlignmentEnumeration(value, alignment))
 314         {
 315           impl.mController->SetHorizontalAlignment(alignment);
 316         }
 317         break;
 318       }
 319       case Toolkit::TextLabel::Property::VERTICAL_ALIGNMENT:
 320       {
 321         Toolkit::Text::VerticalAlignment::Type alignment(static_cast<Text::VerticalAlignment::Type>(-1)); // Set to invalid value to ensure a valid mode does get set
 322         if(Text::GetVerticalAlignmentEnumeration(value, alignment))
 323         {
 324           impl.mController->SetVerticalAlignment(alignment);
 325         }
 326         break;
 327       }
 328       case Toolkit::TextLabel::Property::ENABLE_MARKUP:
 329       {
 330         const bool enableMarkup = value.Get<bool>();
 331         impl.mController->SetMarkupProcessorEnabled(enableMarkup);
 332
 333         if(impl.mController->HasAnchors())
 334         {
 335           // Forward input events to controller
 336           impl.EnableGestureDetection(static_cast<GestureType::Value>(GestureType::TAP));
 337         }
 338         else
 339         {
 340           impl.DisableGestureDetection(static_cast<GestureType::Value>(GestureType::TAP));
 341         }
 342         break;
 343       }
 344       case Toolkit::TextLabel::Property::ENABLE_AUTO_SCROLL:
 345       {
 346         const bool enableAutoScroll = value.Get<bool>();
 347         // If request to auto scroll is the same as current state then do nothing.
 348         if(enableAutoScroll != impl.mController->IsAutoScrollEnabled())
 349         {
 350           // If request is disable (false) and auto scrolling is enabled then need to stop it
 351           if(enableAutoScroll == false)
 352           {
 353             if(impl.mTextScroller)
 354             {
 355               impl.mTextScroller->StopScrolling();
 356             }
 357           }
 358           // If request is enable (true) then start autoscroll as not already running
 359           else
 360           {
 361             impl.mController->SetAutoScrollEnabled(enableAutoScroll);
 362           }
 363         }
 364         break;
 365       }
 366       case Toolkit::TextLabel::Property::AUTO_SCROLL_STOP_MODE:
 367       {
 368         Text::TextScrollerPtr                        textScroller = impl.GetTextScroller();
 369         Toolkit::TextLabel::AutoScrollStopMode::Type stopMode     = textScroller->GetStopMode();
 370         if(Scripting::GetEnumerationProperty<Toolkit::TextLabel::AutoScrollStopMode::Type>(value,
 371                                                                                            AUTO_SCROLL_STOP_MODE_TABLE,
 372                                                                                            AUTO_SCROLL_STOP_MODE_TABLE_COUNT,
 373                                                                                            stopMode))
 374         {
 375           textScroller->SetStopMode(stopMode);
 376         }
 377         break;
 378       }
 379       case Toolkit::TextLabel::Property::AUTO_SCROLL_SPEED:
 380       {
 381         impl.GetTextScroller()->SetSpeed(value.Get<int>());
 382         break;
 383       }
 384       case Toolkit::TextLabel::Property::AUTO_SCROLL_LOOP_COUNT:
 385       {
 386         impl.GetTextScroller()->SetLoopCount(value.Get<int>());
 387         break;
 388       }
 389       case Toolkit::TextLabel::Property::AUTO_SCROLL_LOOP_DELAY:
 390       {
 391         impl.GetTextScroller()->SetLoopDelay(value.Get<float>());
 392         break;
 393       }
 394       case Toolkit::TextLabel::Property::AUTO_SCROLL_GAP:
 395       {
 396         impl.GetTextScroller()->SetGap(value.Get<float>());
 397         break;
 398       }
 399       case Toolkit::TextLabel::Property::LINE_SPACING:
 400       {
 401         const float lineSpacing = value.Get<float>();
 402         impl.mTextUpdateNeeded  = impl.mController->SetDefaultLineSpacing(lineSpacing) || impl.mTextUpdateNeeded;
 403         break;
 404       }
 405       case Toolkit::TextLabel::Property::UNDERLINE:
 406       {
 407         impl.mTextUpdateNeeded = SetUnderlineProperties(impl.mController, value, Text::EffectStyle::DEFAULT) || impl.mTextUpdateNeeded;
 408         break;
 409       }
 410       case Toolkit::TextLabel::Property::SHADOW:
 411       {
 412         impl.mTextUpdateNeeded = SetShadowProperties(impl.mController, value, Text::EffectStyle::DEFAULT) || impl.mTextUpdateNeeded;
 413         break;
 414       }
 415       case Toolkit::TextLabel::Property::EMBOSS:
 416       {
 417         impl.mTextUpdateNeeded = SetEmbossProperties(impl.mController, value, Text::EffectStyle::DEFAULT) || impl.mTextUpdateNeeded;
 418         break;
 419       }
 420       case Toolkit::TextLabel::Property::OUTLINE:
 421       {
 422         impl.mTextUpdateNeeded = SetOutlineProperties(impl.mController, value, Text::EffectStyle::DEFAULT) || impl.mTextUpdateNeeded;
 423         break;
 424       }
 425       case Toolkit::TextLabel::Property::PIXEL_SIZE:
 426       {
 427         const float pixelSize = value.Get<float>();
 428         DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel %p PIXEL_SIZE %f\n", impl.mController.Get(), pixelSize);
 429
 430         if(!Equals(impl.mController->GetDefaultFontSize(Text::Controller::PIXEL_SIZE), pixelSize))
 431         {
 432           impl.mController->SetDefaultFontSize(pixelSize, Text::Controller::PIXEL_SIZE);
 433         }
 434         break;
 435       }
 436       case Toolkit::TextLabel::Property::ELLIPSIS:
 437       {
 438         const bool ellipsis = value.Get<bool>();
 439         DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel %p ELLIPSIS %d\n", impl.mController.Get(), ellipsis);
 440
 441         impl.mController->SetTextElideEnabled(ellipsis);
 442         break;
 443       }
 444       case Toolkit::TextLabel::Property::LINE_WRAP_MODE:
 445       {
 446         Text::LineWrap::Mode lineWrapMode(static_cast<Text::LineWrap::Mode>(-1)); // Set to invalid value to ensure a valid mode does get set
 447         if(GetLineWrapModeEnumeration(value, lineWrapMode))
 448         {
 449           DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel %p LineWrap::MODE %d\n", impl.mController.Get(), lineWrapMode);
 450           impl.mController->SetLineWrapMode(lineWrapMode);
 451         }
 452         break;
 453       }
 454       case Toolkit::DevelTextLabel::Property::VERTICAL_LINE_ALIGNMENT:
 455       {
 456         if(impl.mController->GetTextModel())
 457         {
 458           DevelText::VerticalLineAlignment::Type alignment = static_cast<DevelText::VerticalLineAlignment::Type>(value.Get<int>());
 459
 460           impl.mController->SetVerticalLineAlignment(alignment);
 461
 462           // Property doesn't affect the layout, only Visual must be updated
 463           TextVisual::EnableRendererUpdate(impl.mVisual);
 464
 465           // No need to trigger full re-layout. Instead call UpdateRenderer() directly
 466           TextVisual::UpdateRenderer(impl.mVisual);
 467         }
 468         break;
 469       }
 470       case Toolkit::DevelTextLabel::Property::BACKGROUND:
 471       {
 472         impl.mTextUpdateNeeded = SetBackgroundProperties(impl.mController, value, Text::EffectStyle::DEFAULT) || impl.mTextUpdateNeeded;
 473         break;
 474       }
 475       case Toolkit::DevelTextLabel::Property::IGNORE_SPACES_AFTER_TEXT:
 476       {
 477         impl.mController->SetIgnoreSpacesAfterText(value.Get<bool>());
 478         break;
 479       }
 480       case Toolkit::DevelTextLabel::Property::MATCH_SYSTEM_LANGUAGE_DIRECTION:
 481       {
 482         impl.mController->SetMatchLayoutDirection(value.Get<bool>() ? DevelText::MatchLayoutDirection::LOCALE : DevelText::MatchLayoutDirection::CONTENTS);
 483         break;
 484       }
 485       case Toolkit::DevelTextLabel::Property::TEXT_FIT:
 486       {
 487         ParseTextFitProperty(impl.mController, value.GetMap());
 488         break;
 489       }
 490       case Toolkit::DevelTextLabel::Property::MIN_LINE_SIZE:
 491       {
 492         const float lineSize   = value.Get<float>();
 493         impl.mTextUpdateNeeded = impl.mController->SetDefaultLineSize(lineSize) || impl.mTextUpdateNeeded;
 494         break;
 495       }
 496       case Toolkit::DevelTextLabel::Property::FONT_SIZE_SCALE:
 497       {
 498         const float scale = value.Get<float>();
 499         DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel %p FONT_SIZE_SCALE %f\n", impl.mController.Get(), scale);
 500
 501         if(!Equals(impl.mController->GetFontSizeScale(), scale))
 502         {
 503           impl.mController->SetFontSizeScale(scale);
 504         }
 505         break;
 506       }
 507       case Toolkit::DevelTextLabel::Property::ELLIPSIS_POSITION:
 508       {
 509         DevelText::EllipsisPosition::Type ellipsisPositionType(static_cast<DevelText::EllipsisPosition::Type>(-1)); // Set to invalid value to ensure a valid mode does get set
 510         if(GetEllipsisPositionTypeEnumeration(value, ellipsisPositionType))
 511         {
 512           DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel %p EllipsisPosition::Type %d\n", impl.mController.Get(), ellipsisPositionType);
 513           impl.mController->SetEllipsisPosition(ellipsisPositionType);
 514         }
 515         break;
 516       }
 517     }
 518
 519     // Request relayout when text update is needed. It's necessary to call it
 520     // as changing the property not via UI interaction brings no effect if only
 521     // the mTextUpdateNeeded is changed.
 522     if(impl.mTextUpdateNeeded)
 523     {
 524       // need to request relayout as size of text may have changed
 525       impl.RequestTextRelayout();
 526     }
 527   }
 528 }
 529
 530 Text::ControllerPtr TextLabel::GetTextController()
 531 {
 532   return mController;
 533 }
 534
 535 Property::Value TextLabel::GetProperty(BaseObject* object, Property::Index index)
 536 {
 537   Property::Value value;
 538
 539   Toolkit::TextLabel label = Toolkit::TextLabel::DownCast(Dali::BaseHandle(object));
 540
 541   if(label)
 542   {
 543     TextLabel& impl(GetImpl(label));
 544     DALI_ASSERT_DEBUG(impl.mController && "No text contoller");
 545
 546     switch(index)
 547     {
 548       case Toolkit::DevelTextLabel::Property::RENDERING_BACKEND:
 549       {
 550         value = impl.mRenderingBackend;
 551         break;
 552       }
 553       case Toolkit::TextLabel::Property::TEXT:
 554       {
 555         std::string text;
 556         impl.mController->GetText(text);
 557         value = text;
 558         break;
 559       }
 560       case Toolkit::TextLabel::Property::FONT_FAMILY:
 561       {
 562         value = impl.mController->GetDefaultFontFamily();
 563         break;
 564       }
 565       case Toolkit::TextLabel::Property::FONT_STYLE:
 566       {
 567         GetFontStyleProperty(impl.mController, value, Text::FontStyle::DEFAULT);
 568         break;
 569       }
 570       case Toolkit::TextLabel::Property::POINT_SIZE:
 571       {
 572         value = impl.mController->GetDefaultFontSize(Text::Controller::POINT_SIZE);
 573         break;
 574       }
 575       case Toolkit::TextLabel::Property::MULTI_LINE:
 576       {
 577         value = impl.mController->IsMultiLineEnabled();
 578         break;
 579       }
 580       case Toolkit::TextLabel::Property::HORIZONTAL_ALIGNMENT:
 581       {
 582         const char* name = Text::GetHorizontalAlignmentString(impl.mController->GetHorizontalAlignment());
 583
 584         if(name)
 585         {
 586           value = std::string(name);
 587         }
 588         break;
 589       }
 590       case Toolkit::TextLabel::Property::VERTICAL_ALIGNMENT:
 591       {
 592         const char* name = Text::GetVerticalAlignmentString(impl.mController->GetVerticalAlignment());
 593         if(name)
 594         {
 595           value = std::string(name);
 596         }
 597         break;
 598       }
 599       case Toolkit::TextLabel::Property::ENABLE_MARKUP:
 600       {
 601         value = impl.mController->IsMarkupProcessorEnabled();
 602         break;
 603       }
 604       case Toolkit::TextLabel::Property::ENABLE_AUTO_SCROLL:
 605       {
 606         value = impl.mController->IsAutoScrollEnabled();
 607         break;
 608       }
 609       case Toolkit::TextLabel::Property::AUTO_SCROLL_STOP_MODE:
 610       {
 611         if(impl.mTextScroller)
 612         {
 613           const char* mode = Scripting::GetEnumerationName<Toolkit::TextLabel::AutoScrollStopMode::Type>(impl.mTextScroller->GetStopMode(),
 614                                                                                                          AUTO_SCROLL_STOP_MODE_TABLE,
 615                                                                                                          AUTO_SCROLL_STOP_MODE_TABLE_COUNT);
 616           if(mode)
 617           {
 618             value = std::string(mode);
 619           }
 620         }
 621         break;
 622       }
 623       case Toolkit::TextLabel::Property::AUTO_SCROLL_SPEED:
 624       {
 625         if(impl.mTextScroller)
 626         {
 627           value = impl.mTextScroller->GetSpeed();
 628         }
 629         break;
 630       }
 631       case Toolkit::TextLabel::Property::AUTO_SCROLL_LOOP_COUNT:
 632       {
 633         if(impl.mTextScroller)
 634         {
 635           value = impl.mTextScroller->GetLoopCount();
 636         }
 637         break;
 638       }
 639       case Toolkit::TextLabel::Property::AUTO_SCROLL_LOOP_DELAY:
 640       {
 641         if(impl.mTextScroller)
 642         {
 643           value = impl.mTextScroller->GetLoopDelay();
 644         }
 645         break;
 646       }
 647       case Toolkit::TextLabel::Property::AUTO_SCROLL_GAP:
 648       {
 649         if(impl.mTextScroller)
 650         {
 651           value = impl.mTextScroller->GetGap();
 652         }
 653         break;
 654       }
 655       case Toolkit::TextLabel::Property::LINE_SPACING:
 656       {
 657         value = impl.mController->GetDefaultLineSpacing();
 658         break;
 659       }
 660       case Toolkit::TextLabel::Property::UNDERLINE:
 661       {
 662         GetUnderlineProperties(impl.mController, value, Text::EffectStyle::DEFAULT);
 663         break;
 664       }
 665       case Toolkit::TextLabel::Property::SHADOW:
 666       {
 667         GetShadowProperties(impl.mController, value, Text::EffectStyle::DEFAULT);
 668         break;
 669       }
 670       case Toolkit::TextLabel::Property::EMBOSS:
 671       {
 672         GetEmbossProperties(impl.mController, value, Text::EffectStyle::DEFAULT);
 673         break;
 674       }
 675       case Toolkit::TextLabel::Property::OUTLINE:
 676       {
 677         GetOutlineProperties(impl.mController, value, Text::EffectStyle::DEFAULT);
 678         break;
 679       }
 680       case Toolkit::TextLabel::Property::PIXEL_SIZE:
 681       {
 682         value = impl.mController->GetDefaultFontSize(Text::Controller::PIXEL_SIZE);
 683         break;
 684       }
 685       case Toolkit::TextLabel::Property::ELLIPSIS:
 686       {
 687         value = impl.mController->IsTextElideEnabled();
 688         break;
 689       }
 690       case Toolkit::TextLabel::Property::LINE_WRAP_MODE:
 691       {
 692         value = impl.mController->GetLineWrapMode();
 693         break;
 694       }
 695       case Toolkit::TextLabel::Property::LINE_COUNT:
 696       {
 697         float width = label.GetProperty(Actor::Property::SIZE_WIDTH).Get<float>();
 698         value       = impl.mController->GetLineCount(width);
 699         break;
 700       }
 701       case Toolkit::DevelTextLabel::Property::TEXT_DIRECTION:
 702       {
 703         value = impl.mController->GetTextDirection();
 704         break;
 705       }
 706       case Toolkit::DevelTextLabel::Property::VERTICAL_LINE_ALIGNMENT:
 707       {
 708         value = impl.mController->GetVerticalLineAlignment();
 709         break;
 710       }
 711       case Toolkit::DevelTextLabel::Property::BACKGROUND:
 712       {
 713         GetBackgroundProperties(impl.mController, value, Text::EffectStyle::DEFAULT);
 714         break;
 715       }
 716       case Toolkit::DevelTextLabel::Property::IGNORE_SPACES_AFTER_TEXT:
 717       {
 718         value = impl.mController->IsIgnoreSpacesAfterText();
 719         break;
 720       }
 721       case Toolkit::DevelTextLabel::Property::MATCH_SYSTEM_LANGUAGE_DIRECTION:
 722       {
 723         value = impl.mController->GetMatchLayoutDirection() != DevelText::MatchLayoutDirection::CONTENTS;
 724         break;
 725       }
 726       case Toolkit::DevelTextLabel::Property::TEXT_FIT:
 727       {
 728         const bool  enabled  = impl.mController->IsTextFitEnabled();
 729         const float minSize  = impl.mController->GetTextFitMinSize();
 730         const float maxSize  = impl.mController->GetTextFitMaxSize();
 731         const float stepSize = impl.mController->GetTextFitStepSize();
 732
 733         Property::Map map;
 734         map.Insert(TEXT_FIT_ENABLE_KEY, enabled);
 735         map.Insert(TEXT_FIT_MIN_SIZE_KEY, minSize);
 736         map.Insert(TEXT_FIT_MAX_SIZE_KEY, maxSize);
 737         map.Insert(TEXT_FIT_STEP_SIZE_KEY, stepSize);
 738         map.Insert(TEXT_FIT_FONT_SIZE_TYPE_KEY, "pointSize");
 739
 740         value = map;
 741         break;
 742       }
 743       case Toolkit::DevelTextLabel::Property::MIN_LINE_SIZE:
 744       {
 745         value = impl.mController->GetDefaultLineSize();
 746         break;
 747       }
 748       case Toolkit::DevelTextLabel::Property::FONT_SIZE_SCALE:
 749       {
 750         value = impl.mController->GetFontSizeScale();
 751         break;
 752       }
 753       case Toolkit::DevelTextLabel::Property::ELLIPSIS_POSITION:
 754       {
 755         value = impl.mController->GetEllipsisPosition();
 756         break;
 757       }
 758     }
 759   }
 760
 761   return value;
 762 }
 763
 764 bool TextLabel::DoConnectSignal(BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor)
 765 {
 766   Dali::BaseHandle handle(object);
 767
 768   bool               connected(true);
 769   Toolkit::TextLabel label = Toolkit::TextLabel::DownCast(handle);
 770
 771   if(0 == strcmp(signalName.c_str(), SIGNAL_ANCHOR_CLICKED))
 772   {
 773     if(label)
 774     {
 775       Internal::TextLabel& labelImpl(GetImpl(label));
 776       labelImpl.AnchorClickedSignal().Connect(tracker, functor);
 777     }
 778   }
 779   else
 780   {
 781     // signalName does not match any signal
 782     connected = false;
 783   }
 784
 785   return connected;
 786 }
 787
 788 DevelTextLabel::AnchorClickedSignalType& TextLabel::AnchorClickedSignal()
 789 {
 790   return mAnchorClickedSignal;
 791 }
 792
 793 void TextLabel::OnInitialize()
 794 {
 795   Actor self = Self();
 796
 797   Property::Map propertyMap;
 798   propertyMap.Add(Toolkit::Visual::Property::TYPE, Toolkit::Visual::TEXT);
 799
 800   mVisual = Toolkit::VisualFactory::Get().CreateVisual(propertyMap);
 801   DevelControl::RegisterVisual(*this, Toolkit::TextLabel::Property::TEXT, mVisual);
 802
 803   TextVisual::SetAnimatableTextColorProperty(mVisual, Toolkit::TextLabel::Property::TEXT_COLOR);
 804
 805   mController = TextVisual::GetController(mVisual);
 806   DALI_ASSERT_DEBUG(mController && "Invalid Text Controller")
 807
 808   mController->SetControlInterface(this);
 809   mController->SetAnchorControlInterface(this);
 810
 811   // Use height-for-width negotiation by default
 812   self.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
 813   self.SetResizePolicy(ResizePolicy::DIMENSION_DEPENDENCY, Dimension::HEIGHT);
 814
 815   // Enable highlightability
 816   self.SetProperty(Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE, true);
 817
 818   // Enable the text ellipsis.
 819   mController->SetTextElideEnabled(true); // If false then text larger than control will overflow
 820
 821   // Sets layoutDirection value
 822   Dali::Stage                 stage           = Dali::Stage::GetCurrent();
 823   Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(stage.GetRootLayer().GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
 824   mController->SetLayoutDirection(layoutDirection);
 825
 826   self.LayoutDirectionChangedSignal().Connect(this, &TextLabel::OnLayoutDirectionChanged);
 827
 828   Layout::Engine& engine = mController->GetLayoutEngine();
 829   engine.SetCursorWidth(0u); // Do not layout space for the cursor.
 830
 831   DevelControl::SetAccessibilityConstructor(self, [](Dali::Actor actor) {
 832     return std::unique_ptr<Dali::Accessibility::Accessible>(
 833       new AccessibleImpl(actor, Dali::Accessibility::Role::LABEL));
 834   });
 835 }
 836
 837 void TextLabel::OnStyleChange(Toolkit::StyleManager styleManager, StyleChange::Type change)
 838 {
 839   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "TextLabel::OnStyleChange\n");
 840
 841   switch(change)
 842   {
 843     case StyleChange::DEFAULT_FONT_CHANGE:
 844     {
 845       // Property system did not set the font so should update it.
 846       const std::string& newFont = GetImpl(styleManager).GetDefaultFontFamily();
 847       DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel::OnStyleChange StyleChange::DEFAULT_FONT_CHANGE newFont(%s)\n", newFont.c_str());
 848       mController->UpdateAfterFontChange(newFont);
 849       RelayoutRequest();
 850       break;
 851     }
 852     case StyleChange::DEFAULT_FONT_SIZE_CHANGE:
 853     {
 854       GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 855       RelayoutRequest();
 856       break;
 857     }
 858     case StyleChange::THEME_CHANGE:
 859     {
 860       // Nothing to do, let control base class handle this
 861       break;
 862     }
 863   }
 864
 865   // Up call to Control
 866   Control::OnStyleChange(styleManager, change);
 867 }
 868
 869 void TextLabel::OnTap(const TapGesture& gesture)
 870 {
 871   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "TextLabel::OnTap %p\n", mController.Get());
 872
 873   // Deliver the tap before the focus event to controller; this allows us to detect when focus is gained due to tap-gestures
 874   Extents padding;
 875   padding                   = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 876   const Vector2& localPoint = gesture.GetLocalPoint();
 877   mController->AnchorEvent(localPoint.x - padding.start, localPoint.y - padding.top);
 878 }
 879
 880 void TextLabel::AnchorClicked(const std::string& href)
 881 {
 882   Dali::Toolkit::TextLabel handle(GetOwner());
 883   mAnchorClickedSignal.Emit(handle, href.c_str(), href.length());
 884 }
 885
 886 Vector3 TextLabel::GetNaturalSize()
 887 {
 888   Extents padding;
 889   padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 890
 891   Vector3 naturalSize = mController->GetNaturalSize();
 892   naturalSize.width += (padding.start + padding.end);
 893   naturalSize.height += (padding.top + padding.bottom);
 894
 895   return naturalSize;
 896 }
 897
 898 float TextLabel::GetHeightForWidth(float width)
 899 {
 900   Extents padding;
 901   padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 902
 903   return mController->GetHeightForWidth(width) + padding.top + padding.bottom;
 904 }
 905
 906 void TextLabel::OnPropertySet(Property::Index index, const Property::Value& propertyValue)
 907 {
 908   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "TextLabel::OnPropertySet index[%d]\n", index);
 909
 910   switch(index)
 911   {
 912     case Toolkit::TextLabel::Property::TEXT_COLOR:
 913     {
 914       const Vector4& textColor = propertyValue.Get<Vector4>();
 915       if(mController->GetDefaultColor() != textColor)
 916       {
 917         mController->SetDefaultColor(textColor);
 918         mTextUpdateNeeded = true;
 919       }
 920       break;
 921     }
 922     default:
 923     {
 924       Control::OnPropertySet(index, propertyValue); // up call to control for non-handled properties
 925       break;
 926     }
 927   }
 928 }
 929
 930 void TextLabel::OnRelayout(const Vector2& size, RelayoutContainer& container)
 931 {
 932   DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel::OnRelayout\n");
 933
 934   Actor self = Self();
 935
 936   Extents padding;
 937   padding = self.GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 938
 939   Vector2 contentSize(size.x - (padding.start + padding.end), size.y - (padding.top + padding.bottom));
 940
 941   if(mController->IsTextFitEnabled())
 942   {
 943     mController->FitPointSizeforLayout(contentSize);
 944     mController->SetTextFitContentSize(contentSize);
 945   }
 946
 947   // Support Right-To-Left
 948   Dali::LayoutDirection::Type layoutDirection = mController->GetLayoutDirection(self);
 949
 950   const Text::Controller::UpdateTextType updateTextType = mController->Relayout(contentSize, layoutDirection);
 951
 952   if((Text::Controller::NONE_UPDATED != (Text::Controller::MODEL_UPDATED & updateTextType)) || mTextUpdateNeeded)
 953   {
 954     DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel::OnRelayout IsAutoScrollEnabled[%s] [%p]\n", (mController->IsAutoScrollEnabled()) ? "true" : "false", this);
 955
 956     // Update the visual
 957     TextVisual::EnableRendererUpdate(mVisual);
 958
 959     // Support Right-To-Left of padding
 960     if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
 961     {
 962       std::swap(padding.start, padding.end);
 963     }
 964
 965     // Calculate the size of the visual that can fit the text
 966     Size layoutSize = mController->GetTextModel()->GetLayoutSize();
 967     layoutSize.x    = contentSize.x;
 968
 969     const Vector2& shadowOffset = mController->GetTextModel()->GetShadowOffset();
 970     if(shadowOffset.y > Math::MACHINE_EPSILON_1)
 971     {
 972       layoutSize.y += shadowOffset.y;
 973     }
 974
 975     float outlineWidth = mController->GetTextModel()->GetOutlineWidth();
 976     layoutSize.y += outlineWidth * 2.0f;
 977     layoutSize.y = std::min(layoutSize.y, contentSize.y);
 978
 979     // Calculate the offset for vertical alignment only, as the layout engine will do the horizontal alignment.
 980     Vector2 alignmentOffset;
 981     alignmentOffset.x = 0.0f;
 982     alignmentOffset.y = (contentSize.y - layoutSize.y) * VERTICAL_ALIGNMENT_TABLE[mController->GetVerticalAlignment()];
 983
 984     Property::Map visualTransform;
 985     visualTransform.Add(Toolkit::Visual::Transform::Property::SIZE, layoutSize)
 986       .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY, Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE))
 987       .Add(Toolkit::Visual::Transform::Property::OFFSET, Vector2(padding.start, padding.top) + alignmentOffset)
 988       .Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY, Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE))
 989       .Add(Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN)
 990       .Add(Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN);
 991     mVisual.SetTransformAndSize(visualTransform, size);
 992
 993     if(mController->IsAutoScrollEnabled())
 994     {
 995       SetUpAutoScrolling();
 996     }
 997
 998     mTextUpdateNeeded = false;
 999   }
1000 }
1001
1002 void TextLabel::RequestTextRelayout()
1003 {
1004   RelayoutRequest();
1005   // Signal that a Relayout may be needed
1006 }
1007
1008 void TextLabel::SetUpAutoScrolling()
1009 {
1010   const Size&                    controlSize     = mController->GetView().GetControlSize();
1011   const Size                     textNaturalSize = GetNaturalSize().GetVectorXY(); // As relayout of text may not be done at this point natural size is used to get size. Single line scrolling only.
1012   const Text::CharacterDirection direction       = mController->GetAutoScrollDirection();
1013
1014   DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel::SetUpAutoScrolling textNaturalSize[%f,%f] controlSize[%f,%f]\n", textNaturalSize.x, textNaturalSize.y, controlSize.x, controlSize.y);
1015
1016   if(!mTextScroller)
1017   {
1018     DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel::SetUpAutoScrolling Creating default TextScoller\n");
1019
1020     // If speed, loopCount or gap not set via property system then will need to create a TextScroller with defaults
1021     mTextScroller = Text::TextScroller::New(*this);
1022   }
1023
1024   // Calculate the actual gap before scrolling wraps.
1025   int     textPadding = std::max(controlSize.x - textNaturalSize.x, 0.0f);
1026   float   wrapGap     = std::max(mTextScroller->GetGap(), textPadding);
1027   Vector2 textureSize = textNaturalSize + Vector2(wrapGap, 0.0f); // Add the gap as a part of the texture
1028
1029   // Create a texture of the text for scrolling
1030   Size      verifiedSize   = textureSize;
1031   const int maxTextureSize = Dali::GetMaxTextureSize();
1032
1033   //if the texture size width exceed maxTextureSize, modify the visual model size and enabled the ellipsis
1034   bool actualellipsis = mController->IsTextElideEnabled();
1035   if(verifiedSize.width > maxTextureSize)
1036   {
1037     verifiedSize.width = maxTextureSize;
1038     if(textNaturalSize.width > maxTextureSize)
1039     {
1040       mController->SetTextElideEnabled(true);
1041     }
1042     GetHeightForWidth(maxTextureSize);
1043     wrapGap = std::max(maxTextureSize - textNaturalSize.width, 0.0f);
1044   }
1045
1046   Text::TypesetterPtr typesetter = Text::Typesetter::New(mController->GetTextModel());
1047
1048   PixelData data    = typesetter->Render(verifiedSize, mController->GetTextDirection(), Text::Typesetter::RENDER_TEXT_AND_STYLES, true, Pixel::RGBA8888); // ignore the horizontal alignment
1049   Texture   texture = Texture::New(Dali::TextureType::TEXTURE_2D,
1050                                  data.GetPixelFormat(),
1051                                  data.GetWidth(),
1052                                  data.GetHeight());
1053   texture.Upload(data);
1054
1055   TextureSet textureSet = TextureSet::New();
1056   textureSet.SetTexture(0u, texture);
1057
1058   // Filter mode needs to be set to linear to produce better quality while scaling.
1059   Sampler sampler = Sampler::New();
1060   sampler.SetFilterMode(FilterMode::LINEAR, FilterMode::LINEAR);
1061   sampler.SetWrapMode(Dali::WrapMode::DEFAULT, Dali::WrapMode::REPEAT, Dali::WrapMode::DEFAULT); // Wrap the texture in the x direction
1062   textureSet.SetSampler(0u, sampler);
1063
1064   // Set parameters for scrolling
1065   Renderer renderer = static_cast<Internal::Visual::Base&>(GetImplementation(mVisual)).GetRenderer();
1066   mTextScroller->SetParameters(Self(), renderer, textureSet, controlSize, verifiedSize, wrapGap, direction, mController->GetHorizontalAlignment(), mController->GetVerticalAlignment());
1067   mController->SetTextElideEnabled(actualellipsis);
1068 }
1069
1070 void TextLabel::ScrollingFinished()
1071 {
1072   // Pure Virtual from TextScroller Interface
1073   DALI_LOG_INFO(gLogFilter, Debug::General, "TextLabel::ScrollingFinished\n");
1074   mController->SetAutoScrollEnabled(false);
1075   RequestTextRelayout();
1076 }
1077
1078 void TextLabel::OnLayoutDirectionChanged(Actor actor, LayoutDirection::Type type)
1079 {
1080   mController->ChangedLayoutDirection();
1081 }
1082
1083 TextLabel::TextLabel()
1084 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
1085   mRenderingBackend(DEFAULT_RENDERING_BACKEND),
1086   mTextUpdateNeeded(false)
1087 {
1088 }
1089
1090 TextLabel::~TextLabel()
1091 {
1092 }
1093
1094 std::string TextLabel::AccessibleImpl::GetNameRaw()
1095 {
1096   auto self = Toolkit::TextLabel::DownCast(Self());
1097   return self.GetProperty(Toolkit::TextLabel::Property::TEXT).Get<std::string>();
1098 }
1099
1100 Property::Index TextLabel::AccessibleImpl::GetNamePropertyIndex()
1101 {
1102   return Toolkit::TextLabel::Property::TEXT;
1103 }
1104
1105 std::string TextLabel::AccessibleImpl::GetText(size_t startOffset, size_t endOffset)
1106 {
1107   if(endOffset <= startOffset)
1108   {
1109     return {};
1110   }
1111
1112   auto self = Toolkit::TextLabel::DownCast(Self());
1113   auto text = self.GetProperty(Toolkit::TextLabel::Property::TEXT).Get<std::string>();
1114
1115   if(startOffset > text.size() || endOffset > text.size())
1116   {
1117     return {};
1118   }
1119
1120   return text.substr(startOffset, endOffset - startOffset);
1121 }
1122
1123 size_t TextLabel::AccessibleImpl::GetCharacterCount()
1124 {
1125   auto self = Toolkit::TextLabel::DownCast(Self());
1126   auto text = self.GetProperty(Toolkit::TextLabel::Property::TEXT).Get<std::string>();
1127
1128   return text.size();
1129 }
1130
1131 size_t TextLabel::AccessibleImpl::GetCursorOffset()
1132 {
1133   return {};
1134 }
1135
1136 bool TextLabel::AccessibleImpl::SetCursorOffset(size_t offset)
1137 {
1138   return {};
1139 }
1140
1141 Dali::Accessibility::Range TextLabel::AccessibleImpl::GetTextAtOffset(size_t offset, Dali::Accessibility::TextBoundary boundary)
1142 {
1143   auto self = Toolkit::TextLabel::DownCast(Self());
1144   auto text = self.GetProperty(Toolkit::TextLabel::Property::TEXT).Get<std::string>();
1145   auto textSize = text.size();
1146
1147   auto range = Dali::Accessibility::Range{};
1148
1149   switch(boundary)
1150   {
1151     case Dali::Accessibility::TextBoundary::CHARACTER:
1152     {
1153       if(offset < textSize)
1154       {
1155         range.content     = text[offset];
1156         range.startOffset = offset;
1157         range.endOffset   = offset + 1;
1158       }
1159       break;
1160     }
1161     case Dali::Accessibility::TextBoundary::WORD:
1162     case Dali::Accessibility::TextBoundary::LINE:
1163     {
1164       auto textString = text.c_str();
1165       auto breaks = std::vector<char>(textSize, 0);
1166
1167       if(boundary == Dali::Accessibility::TextBoundary::WORD)
1168       {
1169         Accessibility::Accessible::FindWordSeparationsUtf8(reinterpret_cast<const utf8_t*>(textString), textSize, "", breaks.data());
1170       }
1171       else
1172       {
1173         Accessibility::Accessible::FindLineSeparationsUtf8(reinterpret_cast<const utf8_t*>(textString), textSize, "", breaks.data());
1174       }
1175
1176       auto index = 0u;
1177       auto counter = 0u;
1178       while(index < textSize && counter <= offset)
1179       {
1180         auto start = index;
1181         if(breaks[index])
1182         {
1183           while(breaks[index])
1184           {
1185             index++;
1186           }
1187           counter++;
1188         }
1189         else
1190         {
1191           if(boundary == Dali::Accessibility::TextBoundary::WORD)
1192           {
1193             index++;
1194           }
1195           if(boundary == Dali::Accessibility::TextBoundary::LINE)
1196           {
1197             counter++;
1198           }
1199         }
1200
1201         if((counter > 0) && ((counter - 1) == offset))
1202         {
1203           range.content     = text.substr(start, index - start + 1);
1204           range.startOffset = start;
1205           range.endOffset   = index + 1;
1206         }
1207
1208         if(boundary == Dali::Accessibility::TextBoundary::LINE)
1209         {
1210           index++;
1211         }
1212       }
1213       break;
1214     }
1215     case Dali::Accessibility::TextBoundary::SENTENCE:
1216     {
1217       /* not supported by default */
1218       break;
1219     }
1220     case Dali::Accessibility::TextBoundary::PARAGRAPH:
1221     {
1222       /* Paragraph is not supported by libunibreak library */
1223       break;
1224     }
1225     default:
1226       break;
1227   }
1228
1229   return range;
1230 }
1231
1232 Dali::Accessibility::Range TextLabel::AccessibleImpl::GetRangeOfSelection(size_t selectionIndex)
1233 {
1234   // Since DALi supports only one selection indexes higher than 0 are ignored
1235   if(selectionIndex > 0)
1236   {
1237     return {};
1238   }
1239
1240   auto self  = Toolkit::TextLabel::DownCast(Self());
1241   auto controller = Dali::Toolkit::GetImpl(self).GetTextController();
1242   std::string value{};
1243   controller->RetrieveSelection(value);
1244   auto indices = controller->GetSelectionIndexes();
1245
1246   return {static_cast<size_t>(indices.first), static_cast<size_t>(indices.second), value};
1247 }
1248
1249 bool TextLabel::AccessibleImpl::RemoveSelection(size_t selectionIndex)
1250 {
1251   // Since DALi supports only one selection indexes higher than 0 are ignored
1252   if(selectionIndex > 0)
1253   {
1254     return false;
1255   }
1256
1257   auto self = Toolkit::TextLabel::DownCast(Self());
1258   Dali::Toolkit::GetImpl(self).GetTextController()->SetSelection(0, 0);
1259   return true;
1260 }
1261
1262 bool TextLabel::AccessibleImpl::SetRangeOfSelection(size_t selectionIndex, size_t startOffset, size_t endOffset)
1263 {
1264   // Since DALi supports only one selection indexes higher than 0 are ignored
1265   if(selectionIndex > 0)
1266   {
1267     return false;
1268   }
1269
1270   auto self = Toolkit::TextLabel::DownCast(Self());
1271   Dali::Toolkit::GetImpl(self).GetTextController()->SetSelection(startOffset, endOffset);
1272   return true;
1273 }
1274
1275 } // namespace Internal
1276
1277 } // namespace Toolkit
1278
1279 } // namespace Dali