dali-toolkit/internal/text/text-controller-impl-event-handler.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/text-controller-impl-event-handler.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/integration-api/debug.h>
  23 #include <dali/public-api/adaptor-framework/key.h>
  24
  25 // INTERNAL INCLUDES
  26 #include <dali-toolkit/internal/text/cursor-helper-functions.h>
  27 #include <dali-toolkit/internal/text/text-editable-control-interface.h>
  28
  29 using namespace Dali;
  30
  31 namespace
  32 {
  33 #if defined(DEBUG_ENABLED)
  34 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, true, "LOG_TEXT_CONTROLS");
  35 #endif
  36
  37 } // namespace
  38
  39 namespace Dali
  40 {
  41 namespace Toolkit
  42 {
  43 namespace Text
  44 {
  45 bool ControllerImplEventHandler::ProcessInputEvents(Controller::Impl& impl)
  46 {
  47   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "-->Controller::ProcessInputEvents\n");
  48
  49   EventData*& eventData = impl.mEventData;
  50   if(NULL == eventData)
  51   {
  52     // Nothing to do if there is no text input.
  53     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "<--Controller::ProcessInputEvents no event data\n");
  54     return false;
  55   }
  56
  57   unsigned int oldPos = eventData->mPrimaryCursorPosition;
  58
  59   if(eventData->mDecorator)
  60   {
  61     for(std::vector<Event>::iterator iter = eventData->mEventQueue.begin();
  62         iter != eventData->mEventQueue.end();
  63         ++iter)
  64     {
  65       switch(iter->type)
  66       {
  67         case Event::CURSOR_KEY_EVENT:
  68         {
  69           OnCursorKeyEvent(impl, *iter);
  70           break;
  71         }
  72         case Event::TAP_EVENT:
  73         {
  74           OnTapEvent(impl, *iter);
  75           break;
  76         }
  77         case Event::LONG_PRESS_EVENT:
  78         {
  79           OnLongPressEvent(impl, *iter);
  80           break;
  81         }
  82         case Event::PAN_EVENT:
  83         {
  84           OnPanEvent(impl, *iter);
  85           break;
  86         }
  87         case Event::GRAB_HANDLE_EVENT:
  88         case Event::LEFT_SELECTION_HANDLE_EVENT:
  89         case Event::RIGHT_SELECTION_HANDLE_EVENT: // Fall through
  90         {
  91           OnHandleEvent(impl, *iter);
  92           break;
  93         }
  94         case Event::SELECT:
  95         {
  96           OnSelectEvent(impl, *iter);
  97           break;
  98         }
  99         case Event::SELECT_ALL:
 100         {
 101           OnSelectAllEvent(impl);
 102           break;
 103         }
 104         case Event::SELECT_NONE:
 105         {
 106           OnSelectNoneEvent(impl);
 107           break;
 108         }
 109         case Event::SELECT_RANGE:
 110         {
 111           OnSelectRangeEvent(impl, *iter);
 112           break;
 113         }
 114       }
 115     }
 116   }
 117
 118   if(eventData->mUpdateCursorPosition ||
 119      eventData->mUpdateHighlightBox)
 120   {
 121     impl.NotifyInputMethodContext();
 122   }
 123
 124   // The cursor must also be repositioned after inserts into the model
 125   if(eventData->mUpdateCursorPosition)
 126   {
 127     // Updates the cursor position and scrolls the text to make it visible.
 128     CursorInfo cursorInfo;
 129
 130     // Calculate the cursor position from the new cursor index.
 131     impl.GetCursorPosition(eventData->mPrimaryCursorPosition, cursorInfo);
 132
 133     //only emit the event if the cursor is moved in current function.
 134     if(nullptr != impl.mEditableControlInterface && eventData->mEventQueue.size() > 0)
 135     {
 136       impl.mEditableControlInterface->CursorPositionChanged(oldPos, eventData->mPrimaryCursorPosition);
 137     }
 138
 139     if(eventData->mUpdateCursorHookPosition)
 140     {
 141       // Update the cursor hook position. Used to move the cursor with the keys 'up' and 'down'.
 142       eventData->mCursorHookPositionX      = cursorInfo.primaryPosition.x;
 143       eventData->mUpdateCursorHookPosition = false;
 144     }
 145
 146     // Scroll first the text after delete ...
 147     if(eventData->mScrollAfterDelete)
 148     {
 149       impl.ScrollTextToMatchCursor(cursorInfo);
 150     }
 151
 152     // ... then, text can be scrolled to make the cursor visible.
 153     if(eventData->mScrollAfterUpdatePosition)
 154     {
 155       const Vector2 currentCursorPosition(cursorInfo.primaryPosition.x, cursorInfo.lineOffset);
 156       impl.ScrollToMakePositionVisible(currentCursorPosition, cursorInfo.lineHeight);
 157     }
 158     eventData->mScrollAfterUpdatePosition = false;
 159     eventData->mScrollAfterDelete         = false;
 160
 161     impl.UpdateCursorPosition(cursorInfo);
 162
 163     eventData->mDecoratorUpdated         = true;
 164     eventData->mUpdateCursorPosition     = false;
 165     eventData->mUpdateGrabHandlePosition = false;
 166   }
 167
 168   if(eventData->mUpdateHighlightBox ||
 169      eventData->mUpdateLeftSelectionPosition ||
 170      eventData->mUpdateRightSelectionPosition)
 171   {
 172     CursorInfo leftHandleInfo;
 173     CursorInfo rightHandleInfo;
 174
 175     if(eventData->mUpdateHighlightBox)
 176     {
 177       impl.GetCursorPosition(eventData->mLeftSelectionPosition, leftHandleInfo);
 178
 179       impl.GetCursorPosition(eventData->mRightSelectionPosition, rightHandleInfo);
 180
 181       if(eventData->mScrollAfterUpdatePosition && (eventData->mIsLeftHandleSelected ? eventData->mUpdateLeftSelectionPosition : eventData->mUpdateRightSelectionPosition))
 182       {
 183         if(eventData->mIsLeftHandleSelected && eventData->mIsRightHandleSelected)
 184         {
 185           CursorInfo& infoLeft = leftHandleInfo;
 186
 187           const Vector2 currentCursorPositionLeft(infoLeft.primaryPosition.x, infoLeft.lineOffset);
 188           impl.ScrollToMakePositionVisible(currentCursorPositionLeft, infoLeft.lineHeight);
 189
 190           CursorInfo& infoRight = rightHandleInfo;
 191
 192           const Vector2 currentCursorPositionRight(infoRight.primaryPosition.x, infoRight.lineOffset);
 193           impl.ScrollToMakePositionVisible(currentCursorPositionRight, infoRight.lineHeight);
 194         }
 195         else
 196         {
 197           CursorInfo& info = eventData->mIsLeftHandleSelected ? leftHandleInfo : rightHandleInfo;
 198
 199           const Vector2 currentCursorPosition(info.primaryPosition.x, info.lineOffset);
 200           impl.ScrollToMakePositionVisible(currentCursorPosition, info.lineHeight);
 201         }
 202       }
 203     }
 204
 205     if(eventData->mUpdateLeftSelectionPosition)
 206     {
 207       impl.UpdateSelectionHandle(LEFT_SELECTION_HANDLE, leftHandleInfo);
 208
 209       impl.SetPopupButtons();
 210       eventData->mDecoratorUpdated            = true;
 211       eventData->mUpdateLeftSelectionPosition = false;
 212     }
 213
 214     if(eventData->mUpdateRightSelectionPosition)
 215     {
 216       impl.UpdateSelectionHandle(RIGHT_SELECTION_HANDLE, rightHandleInfo);
 217
 218       impl.SetPopupButtons();
 219       eventData->mDecoratorUpdated             = true;
 220       eventData->mUpdateRightSelectionPosition = false;
 221     }
 222
 223     if(eventData->mUpdateHighlightBox)
 224     {
 225       impl.RepositionSelectionHandles();
 226
 227       eventData->mUpdateLeftSelectionPosition  = false;
 228       eventData->mUpdateRightSelectionPosition = false;
 229       eventData->mUpdateHighlightBox           = false;
 230       eventData->mIsLeftHandleSelected         = false;
 231       eventData->mIsRightHandleSelected        = false;
 232     }
 233
 234     eventData->mScrollAfterUpdatePosition = false;
 235   }
 236
 237   if(eventData->mUpdateInputStyle)
 238   {
 239     // Keep a copy of the current input style.
 240     InputStyle currentInputStyle;
 241     currentInputStyle.Copy(eventData->mInputStyle);
 242
 243     // Set the default style first.
 244     impl.RetrieveDefaultInputStyle(eventData->mInputStyle);
 245
 246     // Get the character index from the cursor index.
 247     const CharacterIndex styleIndex = (eventData->mPrimaryCursorPosition > 0u) ? eventData->mPrimaryCursorPosition - 1u : 0u;
 248
 249     // Retrieve the style from the style runs stored in the logical model.
 250     impl.mModel->mLogicalModel->RetrieveStyle(styleIndex, eventData->mInputStyle);
 251
 252     // Compare if the input style has changed.
 253     const bool hasInputStyleChanged = !currentInputStyle.Equal(eventData->mInputStyle);
 254
 255     if(hasInputStyleChanged)
 256     {
 257       const InputStyle::Mask styleChangedMask = currentInputStyle.GetInputStyleChangeMask(eventData->mInputStyle);
 258       // Queue the input style changed signal.
 259       eventData->mInputStyleChangedQueue.PushBack(styleChangedMask);
 260     }
 261
 262     eventData->mUpdateInputStyle = false;
 263   }
 264
 265   eventData->mEventQueue.clear();
 266
 267   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "<--Controller::ProcessInputEvents\n");
 268
 269   const bool decoratorUpdated  = eventData->mDecoratorUpdated;
 270   eventData->mDecoratorUpdated = false;
 271
 272   return decoratorUpdated;
 273 }
 274
 275 void ControllerImplEventHandler::OnCursorKeyEvent(Controller::Impl& impl, const Event& event)
 276 {
 277   if(NULL == impl.mEventData || !impl.IsShowingRealText())
 278   {
 279     // Nothing to do if there is no text input.
 280     return;
 281   }
 282
 283   int              keyCode         = event.p1.mInt;
 284   bool             isShiftModifier = event.p2.mBool;
 285   EventData&       eventData       = *impl.mEventData;
 286   ModelPtr&        model           = impl.mModel;
 287   LogicalModelPtr& logicalModel    = model->mLogicalModel;
 288   VisualModelPtr&  visualModel     = model->mVisualModel;
 289   uint32_t         oldSelStart     = eventData.mLeftSelectionPosition;
 290   uint32_t         oldSelEnd       = eventData.mRightSelectionPosition;
 291
 292   CharacterIndex& primaryCursorPosition         = eventData.mPrimaryCursorPosition;
 293   CharacterIndex  previousPrimaryCursorPosition = primaryCursorPosition;
 294
 295   if(Dali::DALI_KEY_CURSOR_LEFT == keyCode)
 296   {
 297     if(primaryCursorPosition > 0u)
 298     {
 299       if(!isShiftModifier && eventData.mDecorator->IsHighlightVisible())
 300       {
 301         primaryCursorPosition = std::min(eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 302       }
 303       else
 304       {
 305         primaryCursorPosition = impl.CalculateNewCursorIndex(primaryCursorPosition - 1u);
 306       }
 307     }
 308   }
 309   else if(Dali::DALI_KEY_CURSOR_RIGHT == keyCode)
 310   {
 311     if(logicalModel->mText.Count() > primaryCursorPosition)
 312     {
 313       if(!isShiftModifier && eventData.mDecorator->IsHighlightVisible())
 314       {
 315         primaryCursorPosition = std::max(eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 316       }
 317       else
 318       {
 319         primaryCursorPosition = impl.CalculateNewCursorIndex(primaryCursorPosition);
 320       }
 321     }
 322   }
 323   else if(Dali::DALI_KEY_CURSOR_UP == keyCode && !isShiftModifier)
 324   {
 325     // Ignore Shift-Up for text selection for now.
 326
 327     // Get first the line index of the current cursor position index.
 328     CharacterIndex characterIndex = 0u;
 329
 330     if(primaryCursorPosition > 0u)
 331     {
 332       characterIndex = primaryCursorPosition - 1u;
 333     }
 334
 335     const LineIndex lineIndex         = visualModel->GetLineOfCharacter(characterIndex);
 336     const LineIndex previousLineIndex = (lineIndex > 0 ? lineIndex - 1u : lineIndex);
 337     const LineIndex lastLineIndex     = (visualModel->mLines.Size() > 0 ? visualModel->mLines.Size() - 1u : 0);
 338     const bool      isLastLine        = (previousLineIndex == lastLineIndex);
 339
 340     // Retrieve the cursor position info.
 341     CursorInfo cursorInfo;
 342     impl.GetCursorPosition(primaryCursorPosition,
 343                            cursorInfo);
 344
 345     // Get the line above.
 346     const LineRun& line = *(visualModel->mLines.Begin() + previousLineIndex);
 347
 348     // Get the next hit 'y' point.
 349     const float hitPointY = cursorInfo.lineOffset - 0.5f * GetLineHeight(line, isLastLine);
 350
 351     // Use the cursor hook position 'x' and the next hit 'y' position to calculate the new cursor index.
 352     bool matchedCharacter = false;
 353     primaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 354                                                         logicalModel,
 355                                                         impl.mMetrics,
 356                                                         eventData.mCursorHookPositionX,
 357                                                         hitPointY,
 358                                                         CharacterHitTest::TAP,
 359                                                         matchedCharacter);
 360   }
 361   else if(Dali::DALI_KEY_CURSOR_DOWN == keyCode && !isShiftModifier)
 362   {
 363     // Ignore Shift-Down for text selection for now.
 364
 365     // Get first the line index of the current cursor position index.
 366     CharacterIndex characterIndex = 0u;
 367
 368     if(primaryCursorPosition > 0u)
 369     {
 370       characterIndex = primaryCursorPosition - 1u;
 371     }
 372
 373     const LineIndex lineIndex = visualModel->GetLineOfCharacter(characterIndex);
 374
 375     if(lineIndex + 1u < visualModel->mLines.Count())
 376     {
 377       // Retrieve the cursor position info.
 378       CursorInfo cursorInfo;
 379       impl.GetCursorPosition(primaryCursorPosition, cursorInfo);
 380
 381       // Get the line below.
 382       const LineRun& line = *(visualModel->mLines.Begin() + lineIndex + 1u);
 383
 384       // Get last line index
 385       const LineIndex lastLineIndex = (visualModel->mLines.Size() > 0 ? visualModel->mLines.Size() - 1u : 0);
 386       const bool      isLastLine    = (lineIndex + 1u == lastLineIndex);
 387
 388       // Get the next hit 'y' point.
 389       const float hitPointY = cursorInfo.lineOffset + cursorInfo.lineHeight + 0.5f * GetLineHeight(line, isLastLine);
 390
 391       // Use the cursor hook position 'x' and the next hit 'y' position to calculate the new cursor index.
 392       bool matchedCharacter = false;
 393       primaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 394                                                           logicalModel,
 395                                                           impl.mMetrics,
 396                                                           eventData.mCursorHookPositionX,
 397                                                           hitPointY,
 398                                                           CharacterHitTest::TAP,
 399                                                           matchedCharacter);
 400     }
 401   }
 402
 403   if(!isShiftModifier && eventData.mState != EventData::SELECTING)
 404   {
 405     // Update selection position after moving the cursor
 406     eventData.mLeftSelectionPosition  = primaryCursorPosition;
 407     eventData.mRightSelectionPosition = primaryCursorPosition;
 408
 409     if(impl.mSelectableControlInterface != nullptr && eventData.mDecorator->IsHighlightVisible())
 410     {
 411       impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 412     }
 413   }
 414
 415   if(isShiftModifier && impl.IsShowingRealText() && eventData.mShiftSelectionFlag)
 416   {
 417     // Handle text selection
 418     bool selecting = false;
 419
 420     if(Dali::DALI_KEY_CURSOR_LEFT == keyCode || Dali::DALI_KEY_CURSOR_RIGHT == keyCode)
 421     {
 422       // Shift-Left/Right to select the text
 423       int cursorPositionDelta = primaryCursorPosition - previousPrimaryCursorPosition;
 424       if(cursorPositionDelta > 0 || eventData.mRightSelectionPosition > 0u) // Check the boundary
 425       {
 426         eventData.mRightSelectionPosition += cursorPositionDelta;
 427         eventData.mPrimaryCursorPosition = eventData.mRightSelectionPosition;
 428
 429         if(impl.mSelectableControlInterface != nullptr)
 430         {
 431           impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 432         }
 433       }
 434
 435       if(impl.mSelectableControlInterface != nullptr && eventData.mLeftSelectionPosition == eventData.mRightSelectionPosition)
 436       {
 437         // If left selection position and right selection position are the same, the selection is canceled.
 438         selecting = false;
 439       }
 440       else
 441       {
 442         selecting = true;
 443       }
 444     }
 445     else if(eventData.mLeftSelectionPosition != eventData.mRightSelectionPosition)
 446     {
 447       // Show no grab handles and text highlight if Shift-Up/Down pressed but no selected text
 448       selecting = true;
 449     }
 450
 451     if(selecting)
 452     {
 453       // Notify the cursor position to the InputMethodContext.
 454       if(eventData.mInputMethodContext)
 455       {
 456         eventData.mInputMethodContext.SetCursorPosition(primaryCursorPosition);
 457         eventData.mInputMethodContext.NotifyCursorPosition();
 458       }
 459
 460       impl.ChangeState(EventData::SELECTING);
 461
 462       eventData.mUpdateLeftSelectionPosition  = true;
 463       eventData.mUpdateRightSelectionPosition = true;
 464       eventData.mUpdateGrabHandlePosition     = true;
 465       eventData.mUpdateHighlightBox           = true;
 466
 467       // Hide the text selection popup if select the text using keyboard instead of moving grab handles
 468       if(eventData.mGrabHandlePopupEnabled)
 469       {
 470         eventData.mDecorator->SetPopupActive(false);
 471       }
 472     }
 473     else
 474     {
 475       // If no selection, set a normal cursor.
 476       impl.ChangeState(EventData::EDITING);
 477       eventData.mUpdateCursorPosition = true;
 478     }
 479   }
 480   else
 481   {
 482     // Handle normal cursor move
 483     impl.ChangeState(EventData::EDITING);
 484     eventData.mUpdateCursorPosition = true;
 485   }
 486
 487   eventData.mUpdateInputStyle          = true;
 488   eventData.mScrollAfterUpdatePosition = true;
 489 }
 490
 491 void ControllerImplEventHandler::OnTapEvent(Controller::Impl& impl, const Event& event)
 492 {
 493   if(impl.mEventData)
 494   {
 495     const unsigned int tapCount     = event.p1.mUint;
 496     EventData&         eventData    = *impl.mEventData;
 497     ModelPtr&          model        = impl.mModel;
 498     LogicalModelPtr&   logicalModel = model->mLogicalModel;
 499     VisualModelPtr&    visualModel  = model->mVisualModel;
 500
 501     if(1u == tapCount)
 502     {
 503       if(impl.IsShowingRealText())
 504       {
 505         // Convert from control's coords to text's coords.
 506         const float xPosition   = event.p2.mFloat - model->mScrollPosition.x;
 507         const float yPosition   = event.p3.mFloat - model->mScrollPosition.y;
 508         uint32_t    oldSelStart = eventData.mLeftSelectionPosition;
 509         uint32_t    oldSelEnd   = eventData.mRightSelectionPosition;
 510
 511         // Keep the tap 'x' position. Used to move the cursor.
 512         eventData.mCursorHookPositionX = xPosition;
 513
 514         // Whether to touch point hits on a glyph.
 515         bool matchedCharacter            = false;
 516         eventData.mPrimaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 517                                                                        logicalModel,
 518                                                                        impl.mMetrics,
 519                                                                        xPosition,
 520                                                                        yPosition,
 521                                                                        CharacterHitTest::TAP,
 522                                                                        matchedCharacter);
 523
 524         if(impl.mSelectableControlInterface != nullptr && eventData.mDecorator->IsHighlightVisible())
 525         {
 526           impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mPrimaryCursorPosition, eventData.mPrimaryCursorPosition);
 527         }
 528
 529         // When the cursor position is changing, delay cursor blinking
 530         eventData.mDecorator->DelayCursorBlink();
 531       }
 532       else
 533       {
 534         eventData.mPrimaryCursorPosition = 0u;
 535       }
 536
 537       // Update selection position after tapping
 538       eventData.mLeftSelectionPosition  = eventData.mPrimaryCursorPosition;
 539       eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 540
 541       eventData.mUpdateCursorPosition      = true;
 542       eventData.mUpdateGrabHandlePosition  = true;
 543       eventData.mScrollAfterUpdatePosition = true;
 544       eventData.mUpdateInputStyle          = true;
 545
 546       // Notify the cursor position to the InputMethodContext.
 547       if(eventData.mInputMethodContext)
 548       {
 549         eventData.mInputMethodContext.SetCursorPosition(eventData.mPrimaryCursorPosition);
 550         eventData.mInputMethodContext.NotifyCursorPosition();
 551       }
 552     }
 553     else if(2u == tapCount)
 554     {
 555       if(eventData.mSelectionEnabled)
 556       {
 557         // Convert from control's coords to text's coords.
 558         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 559         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 560
 561         // Calculates the logical position from the x,y coords.
 562         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mDoubleTapAction);
 563       }
 564     }
 565   }
 566 }
 567
 568 void ControllerImplEventHandler::OnPanEvent(Controller::Impl& impl, const Event& event)
 569 {
 570   if(impl.mEventData)
 571   {
 572     EventData&    eventData = *impl.mEventData;
 573     DecoratorPtr& decorator = eventData.mDecorator;
 574
 575     const bool isHorizontalScrollEnabled = decorator->IsHorizontalScrollEnabled();
 576     const bool isVerticalScrollEnabled   = decorator->IsVerticalScrollEnabled();
 577
 578     if(!isHorizontalScrollEnabled && !isVerticalScrollEnabled)
 579     {
 580       // Nothing to do if scrolling is not enabled.
 581       return;
 582     }
 583
 584     const GestureState state = static_cast<GestureState>(event.p1.mInt);
 585     switch(state)
 586     {
 587       case GestureState::STARTED:
 588       {
 589         // Will remove the cursor, handles or text's popup, ...
 590         impl.ChangeState(EventData::TEXT_PANNING);
 591         break;
 592       }
 593       case GestureState::CONTINUING:
 594       {
 595         ModelPtr& model = impl.mModel;
 596
 597         const Vector2& layoutSize     = model->mVisualModel->GetLayoutSize();
 598         Vector2&       scrollPosition = model->mScrollPosition;
 599         const Vector2  currentScroll  = scrollPosition;
 600
 601         if(isHorizontalScrollEnabled)
 602         {
 603           const float displacementX = event.p2.mFloat;
 604           scrollPosition.x += displacementX;
 605
 606           impl.ClampHorizontalScroll(layoutSize);
 607         }
 608
 609         if(isVerticalScrollEnabled)
 610         {
 611           const float displacementY = event.p3.mFloat;
 612           scrollPosition.y += displacementY;
 613
 614           impl.ClampVerticalScroll(layoutSize);
 615         }
 616
 617         decorator->UpdatePositions(scrollPosition - currentScroll);
 618         break;
 619       }
 620       case GestureState::FINISHED:
 621       case GestureState::CANCELLED: // FALLTHROUGH
 622       {
 623         // Will go back to the previous state to show the cursor, handles, the text's popup, ...
 624         impl.ChangeState(eventData.mPreviousState);
 625         break;
 626       }
 627       default:
 628         break;
 629     }
 630   }
 631 }
 632
 633 void ControllerImplEventHandler::OnLongPressEvent(Controller::Impl& impl, const Event& event)
 634 {
 635   DALI_LOG_INFO(gLogFilter, Debug::General, "Controller::OnLongPressEvent\n");
 636
 637   if(impl.mEventData)
 638   {
 639     EventData& eventData = *impl.mEventData;
 640
 641     if(!impl.IsShowingRealText() && (EventData::EDITING == eventData.mState))
 642     {
 643       impl.ChangeState(EventData::EDITING_WITH_POPUP);
 644       eventData.mDecoratorUpdated = true;
 645       eventData.mUpdateInputStyle = true;
 646     }
 647     else
 648     {
 649       if(eventData.mSelectionEnabled)
 650       {
 651         ModelPtr& model = impl.mModel;
 652
 653         // Convert from control's coords to text's coords.
 654         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 655         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 656
 657         // Calculates the logical position from the x,y coords.
 658         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mLongPressAction);
 659       }
 660     }
 661   }
 662 }
 663
 664 void ControllerImplEventHandler::OnHandleEvent(Controller::Impl& impl, const Event& event)
 665 {
 666   if(impl.mEventData)
 667   {
 668     const unsigned int state                    = event.p1.mUint;
 669     const bool         handleStopScrolling      = (HANDLE_STOP_SCROLLING == state);
 670     const bool         isSmoothHandlePanEnabled = impl.mEventData->mDecorator->IsSmoothHandlePanEnabled();
 671
 672     if(HANDLE_PRESSED == state)
 673     {
 674       OnHandlePressed(impl, event, isSmoothHandlePanEnabled);
 675     } // end ( HANDLE_PRESSED == state )
 676     else if((HANDLE_RELEASED == state) ||
 677             handleStopScrolling)
 678     {
 679       OnHandleReleased(impl, event, isSmoothHandlePanEnabled, handleStopScrolling);
 680     } // end ( ( HANDLE_RELEASED == state ) || ( HANDLE_STOP_SCROLLING == state ) )
 681     else if(HANDLE_SCROLLING == state)
 682     {
 683       OnHandleScrolling(impl, event, isSmoothHandlePanEnabled);
 684     } // end ( HANDLE_SCROLLING == state )
 685   }
 686 }
 687
 688 void ControllerImplEventHandler::OnSelectEvent(Controller::Impl& impl, const Event& event)
 689 {
 690   if(impl.mEventData && impl.mEventData->mSelectionEnabled)
 691   {
 692     ModelPtr&      model          = impl.mModel;
 693     const Vector2& scrollPosition = model->mScrollPosition;
 694
 695     // Convert from control's coords to text's coords.
 696     const float xPosition = event.p2.mFloat - scrollPosition.x;
 697     const float yPosition = event.p3.mFloat - scrollPosition.y;
 698
 699     // Calculates the logical position from the x,y coords.
 700     impl.RepositionSelectionHandles(xPosition, yPosition, Controller::NoTextTap::HIGHLIGHT);
 701   }
 702 }
 703
 704 void ControllerImplEventHandler::OnSelectAllEvent(Controller::Impl& impl)
 705 {
 706   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectAllEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 707
 708   if(impl.mEventData)
 709   {
 710     EventData& eventData = *impl.mEventData;
 711     if(eventData.mSelectionEnabled && eventData.mState != EventData::INACTIVE)
 712     {
 713       ModelPtr&      model          = impl.mModel;
 714       const Vector2& scrollPosition = model->mScrollPosition;
 715
 716       // Calculates the logical position from the start.
 717       impl.RepositionSelectionHandles(0.f - scrollPosition.x,
 718                                       0.f - scrollPosition.y,
 719                                       Controller::NoTextTap::HIGHLIGHT);
 720
 721       uint32_t oldStart = eventData.mLeftSelectionPosition;
 722       uint32_t oldEnd   = eventData.mRightSelectionPosition;
 723
 724       eventData.mLeftSelectionPosition  = 0u;
 725       eventData.mRightSelectionPosition = model->mLogicalModel->mText.Count();
 726       eventData.mPrimaryCursorPosition  = eventData.mRightSelectionPosition;
 727
 728       if(impl.mSelectableControlInterface != nullptr)
 729       {
 730         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 731       }
 732     }
 733   }
 734 }
 735
 736 void ControllerImplEventHandler::OnSelectNoneEvent(Controller::Impl& impl)
 737 {
 738   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectNoneEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 739
 740   if(impl.mEventData)
 741   {
 742     EventData& eventData = *impl.mEventData;
 743     if(eventData.mSelectionEnabled && eventData.mState == EventData::SELECTING)
 744     {
 745       uint32_t oldStart = eventData.mLeftSelectionPosition;
 746       uint32_t oldEnd   = eventData.mRightSelectionPosition;
 747
 748       eventData.mLeftSelectionPosition = eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 749       impl.ChangeState(EventData::EDITING);
 750       eventData.mUpdateCursorPosition      = true;
 751       eventData.mUpdateInputStyle          = true;
 752       eventData.mScrollAfterUpdatePosition = true;
 753
 754       if(impl.mSelectableControlInterface != nullptr)
 755       {
 756         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 757       }
 758     }
 759   }
 760 }
 761
 762 void ControllerImplEventHandler::OnSelectRangeEvent(Controller::Impl& impl, const Event& event)
 763 {
 764   if(impl.mEventData && impl.mEventData->mSelectionEnabled && impl.mEventData->mState != EventData::INACTIVE)
 765   {
 766     ModelPtr&      model          = impl.mModel;
 767     const Vector2& scrollPosition = model->mScrollPosition;
 768
 769     // Calculate the selection index.
 770     const uint32_t length = static_cast<uint32_t>(model->mLogicalModel->mText.Count());
 771     const uint32_t start  = std::min(event.p2.mUint, length);
 772     const uint32_t end    = std::min(event.p3.mUint, length);
 773
 774     if(start != end)
 775     {
 776       uint32_t oldStart = impl.mEventData->mLeftSelectionPosition;
 777       uint32_t oldEnd   = impl.mEventData->mRightSelectionPosition;
 778
 779       // Calculates the logical position from the x,y coords.
 780       impl.RepositionSelectionHandles(0.f - scrollPosition.x, 0.f - scrollPosition.y, Controller::NoTextTap::HIGHLIGHT);
 781
 782       impl.mEventData->mLeftSelectionPosition  = start;
 783       impl.mEventData->mRightSelectionPosition = end;
 784       impl.mEventData->mPrimaryCursorPosition  = end;
 785
 786       if(impl.mSelectableControlInterface != nullptr)
 787       {
 788         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, start, end);
 789       }
 790     }
 791   }
 792 }
 793
 794 void ControllerImplEventHandler::OnHandlePressed(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 795 {
 796   ModelPtr&      model          = impl.mModel;
 797   const Vector2& scrollPosition = model->mScrollPosition;
 798
 799   // Convert from decorator's coords to text's coords.
 800   const float xPosition = event.p2.mFloat - scrollPosition.x;
 801   const float yPosition = event.p3.mFloat - scrollPosition.y;
 802
 803   // Need to calculate the handle's new position.
 804   bool                 matchedCharacter  = false;
 805   const CharacterIndex handleNewPosition = Text::GetClosestCursorIndex(model->mVisualModel,
 806                                                                        model->mLogicalModel,
 807                                                                        impl.mMetrics,
 808                                                                        xPosition,
 809                                                                        yPosition,
 810                                                                        CharacterHitTest::SCROLL,
 811                                                                        matchedCharacter);
 812
 813   EventData& eventData = *impl.mEventData;
 814   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 815   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 816
 817   if(Event::GRAB_HANDLE_EVENT == event.type)
 818   {
 819     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
 820
 821     if(handleNewPosition != eventData.mPrimaryCursorPosition)
 822     {
 823       // Updates the cursor position if the handle's new position is different than the current one.
 824       eventData.mUpdateCursorPosition = true;
 825       // Does not update the grab handle position if the smooth panning is enabled. (The decorator does it smooth).
 826       eventData.mUpdateGrabHandlePosition = !isSmoothHandlePanEnabled;
 827       eventData.mPrimaryCursorPosition    = handleNewPosition;
 828     }
 829
 830     // Updates the decorator if the soft handle panning is enabled. It triggers a relayout in the decorator and the new position of the handle is set.
 831     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 832   }
 833   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 834   {
 835     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 836
 837     if((handleNewPosition != eventData.mLeftSelectionPosition) &&
 838        (handleNewPosition != eventData.mRightSelectionPosition))
 839     {
 840       // Updates the highlight box if the handle's new position is different than the current one.
 841       eventData.mUpdateHighlightBox = true;
 842       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 843       eventData.mUpdateLeftSelectionPosition = !isSmoothHandlePanEnabled;
 844       eventData.mLeftSelectionPosition       = handleNewPosition;
 845     }
 846
 847     // Updates the decorator if the soft handle panning is enabled. It triggers a relayout in the decorator and the new position of the handle is set.
 848     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 849
 850     // Will define the order to scroll the text to match the handle position.
 851     eventData.mIsLeftHandleSelected  = true;
 852     eventData.mIsRightHandleSelected = false;
 853   }
 854   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 855   {
 856     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 857
 858     if((handleNewPosition != eventData.mRightSelectionPosition) &&
 859        (handleNewPosition != eventData.mLeftSelectionPosition))
 860     {
 861       // Updates the highlight box if the handle's new position is different than the current one.
 862       eventData.mUpdateHighlightBox = true;
 863       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 864       eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
 865       eventData.mRightSelectionPosition       = handleNewPosition;
 866     }
 867
 868     // Updates the decorator if the soft handle panning is enabled. It triggers a relayout in the decorator and the new position of the handle is set.
 869     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 870
 871     // Will define the order to scroll the text to match the handle position.
 872     eventData.mIsLeftHandleSelected  = false;
 873     eventData.mIsRightHandleSelected = true;
 874   }
 875
 876   if((impl.mSelectableControlInterface != nullptr) && ((oldStart != eventData.mLeftSelectionPosition) || (oldEnd != eventData.mRightSelectionPosition)))
 877   {
 878     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 879   }
 880 }
 881
 882 void ControllerImplEventHandler::OnHandleReleased(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled, const bool handleStopScrolling)
 883 {
 884   CharacterIndex handlePosition = 0u;
 885   if(handleStopScrolling || isSmoothHandlePanEnabled)
 886   {
 887     ModelPtr&      model          = impl.mModel;
 888     const Vector2& scrollPosition = model->mScrollPosition;
 889
 890     // Convert from decorator's coords to text's coords.
 891     const float xPosition = event.p2.mFloat - scrollPosition.x;
 892     const float yPosition = event.p3.mFloat - scrollPosition.y;
 893
 894     bool matchedCharacter = false;
 895     handlePosition        = Text::GetClosestCursorIndex(model->mVisualModel,
 896                                                  model->mLogicalModel,
 897                                                  impl.mMetrics,
 898                                                  xPosition,
 899                                                  yPosition,
 900                                                  CharacterHitTest::SCROLL,
 901                                                  matchedCharacter);
 902   }
 903
 904   EventData& eventData = *impl.mEventData;
 905   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 906   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 907
 908   if(Event::GRAB_HANDLE_EVENT == event.type)
 909   {
 910     eventData.mUpdateCursorPosition     = true;
 911     eventData.mUpdateGrabHandlePosition = true;
 912     eventData.mUpdateInputStyle         = true;
 913
 914     if(!impl.IsClipboardEmpty())
 915     {
 916       impl.ChangeState(EventData::EDITING_WITH_PASTE_POPUP); // Moving grabhandle will show Paste Popup
 917     }
 918
 919     if(handleStopScrolling || isSmoothHandlePanEnabled)
 920     {
 921       eventData.mScrollAfterUpdatePosition = true;
 922       eventData.mPrimaryCursorPosition     = handlePosition;
 923     }
 924   }
 925   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 926   {
 927     impl.ChangeState(EventData::SELECTING);
 928
 929     eventData.mUpdateHighlightBox           = true;
 930     eventData.mUpdateLeftSelectionPosition  = true;
 931     eventData.mUpdateRightSelectionPosition = true;
 932
 933     if(handleStopScrolling || isSmoothHandlePanEnabled)
 934     {
 935       eventData.mScrollAfterUpdatePosition = true;
 936
 937       if((handlePosition != eventData.mRightSelectionPosition) &&
 938          (handlePosition != eventData.mLeftSelectionPosition))
 939       {
 940         eventData.mLeftSelectionPosition = handlePosition;
 941       }
 942     }
 943   }
 944   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 945   {
 946     impl.ChangeState(EventData::SELECTING);
 947
 948     eventData.mUpdateHighlightBox           = true;
 949     eventData.mUpdateRightSelectionPosition = true;
 950     eventData.mUpdateLeftSelectionPosition  = true;
 951
 952     if(handleStopScrolling || isSmoothHandlePanEnabled)
 953     {
 954       eventData.mScrollAfterUpdatePosition = true;
 955       if((handlePosition != eventData.mRightSelectionPosition) &&
 956          (handlePosition != eventData.mLeftSelectionPosition))
 957       {
 958         eventData.mRightSelectionPosition = handlePosition;
 959       }
 960     }
 961   }
 962
 963   if((impl.mSelectableControlInterface != nullptr) && ((oldStart != eventData.mLeftSelectionPosition) || (oldEnd != eventData.mRightSelectionPosition)))
 964   {
 965     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 966   }
 967
 968   eventData.mDecoratorUpdated = true;
 969 }
 970
 971 void ControllerImplEventHandler::OnHandleScrolling(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 972 {
 973   ModelPtr&       model          = impl.mModel;
 974   Vector2&        scrollPosition = model->mScrollPosition;
 975   VisualModelPtr& visualModel    = model->mVisualModel;
 976
 977   const float    xSpeed                = event.p2.mFloat;
 978   const float    ySpeed                = event.p3.mFloat;
 979   const Vector2& layoutSize            = visualModel->GetLayoutSize();
 980   const Vector2  currentScrollPosition = scrollPosition;
 981
 982   scrollPosition.x += xSpeed;
 983   scrollPosition.y += ySpeed;
 984
 985   impl.ClampHorizontalScroll(layoutSize);
 986   impl.ClampVerticalScroll(layoutSize);
 987
 988   EventData&    eventData = *impl.mEventData;
 989   DecoratorPtr& decorator = eventData.mDecorator;
 990
 991   bool endOfScroll = false;
 992   if(Vector2::ZERO == (currentScrollPosition - scrollPosition))
 993   {
 994     // Notify the decorator there is no more text to scroll.
 995     // The decorator won't send more scroll events.
 996     decorator->NotifyEndOfScroll();
 997     // Still need to set the position of the handle.
 998     endOfScroll = true;
 999   }
1000
1001   // Set the position of the handle.
1002   const bool scrollRightDirection      = xSpeed > 0.f;
1003   const bool scrollBottomDirection     = ySpeed > 0.f;
1004   const bool leftSelectionHandleEvent  = Event::LEFT_SELECTION_HANDLE_EVENT == event.type;
1005   const bool rightSelectionHandleEvent = Event::RIGHT_SELECTION_HANDLE_EVENT == event.type;
1006
1007   if(Event::GRAB_HANDLE_EVENT == event.type)
1008   {
1009     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
1010
1011     // Get the grab handle position in decorator coords.
1012     Vector2 position = decorator->GetPosition(GRAB_HANDLE);
1013
1014     if(decorator->IsHorizontalScrollEnabled())
1015     {
1016       // Position the grag handle close to either the left or right edge.
1017       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
1018     }
1019
1020     if(decorator->IsVerticalScrollEnabled())
1021     {
1022       position.x = eventData.mCursorHookPositionX;
1023
1024       // Position the grag handle close to either the top or bottom edge.
1025       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1026     }
1027
1028     // Get the new handle position.
1029     // The grab handle's position is in decorator's coords. Need to transforms to text's coords.
1030     bool                 matchedCharacter = false;
1031     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1032                                                                       impl.mModel->mLogicalModel,
1033                                                                       impl.mMetrics,
1034                                                                       position.x - scrollPosition.x,
1035                                                                       position.y - scrollPosition.y,
1036                                                                       CharacterHitTest::SCROLL,
1037                                                                       matchedCharacter);
1038
1039     if(eventData.mPrimaryCursorPosition != handlePosition)
1040     {
1041       eventData.mUpdateCursorPosition      = true;
1042       eventData.mUpdateGrabHandlePosition  = !isSmoothHandlePanEnabled;
1043       eventData.mScrollAfterUpdatePosition = true;
1044       eventData.mPrimaryCursorPosition     = handlePosition;
1045     }
1046     eventData.mUpdateInputStyle = eventData.mUpdateCursorPosition;
1047
1048     // Updates the decorator if the soft handle panning is enabled.
1049     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
1050   }
1051   else if(leftSelectionHandleEvent || rightSelectionHandleEvent)
1052   {
1053     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
1054
1055     // Get the selection handle position in decorator coords.
1056     Vector2 position = decorator->GetPosition(leftSelectionHandleEvent ? Text::LEFT_SELECTION_HANDLE : Text::RIGHT_SELECTION_HANDLE);
1057
1058     if(decorator->IsHorizontalScrollEnabled())
1059     {
1060       // Position the selection handle close to either the left or right edge.
1061       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
1062     }
1063
1064     if(decorator->IsVerticalScrollEnabled())
1065     {
1066       position.x = eventData.mCursorHookPositionX;
1067
1068       // Position the grag handle close to either the top or bottom edge.
1069       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1070     }
1071
1072     // Get the new handle position.
1073     // The selection handle's position is in decorator's coords. Need to transform to text's coords.
1074     bool                 matchedCharacter = false;
1075     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1076                                                                       impl.mModel->mLogicalModel,
1077                                                                       impl.mMetrics,
1078                                                                       position.x - scrollPosition.x,
1079                                                                       position.y - scrollPosition.y,
1080                                                                       CharacterHitTest::SCROLL,
1081                                                                       matchedCharacter);
1082     uint32_t             oldStart         = eventData.mLeftSelectionPosition;
1083     uint32_t             oldEnd           = eventData.mRightSelectionPosition;
1084
1085     if(leftSelectionHandleEvent)
1086     {
1087       const bool differentHandles = (eventData.mLeftSelectionPosition != handlePosition) && (eventData.mRightSelectionPosition != handlePosition);
1088
1089       if(differentHandles || endOfScroll)
1090       {
1091         eventData.mUpdateHighlightBox           = true;
1092         eventData.mUpdateLeftSelectionPosition  = !isSmoothHandlePanEnabled;
1093         eventData.mUpdateRightSelectionPosition = isSmoothHandlePanEnabled;
1094         eventData.mLeftSelectionPosition        = handlePosition;
1095       }
1096     }
1097     else
1098     {
1099       const bool differentHandles = (eventData.mRightSelectionPosition != handlePosition) && (eventData.mLeftSelectionPosition != handlePosition);
1100       if(differentHandles || endOfScroll)
1101       {
1102         eventData.mUpdateHighlightBox           = true;
1103         eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
1104         eventData.mUpdateLeftSelectionPosition  = isSmoothHandlePanEnabled;
1105         eventData.mRightSelectionPosition       = handlePosition;
1106       }
1107     }
1108
1109     if(eventData.mUpdateLeftSelectionPosition || eventData.mUpdateRightSelectionPosition)
1110     {
1111       impl.RepositionSelectionHandles();
1112
1113       eventData.mScrollAfterUpdatePosition = !isSmoothHandlePanEnabled;
1114
1115       if(impl.mSelectableControlInterface != nullptr)
1116       {
1117         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
1118       }
1119     }
1120   }
1121   eventData.mDecoratorUpdated = true;
1122 }
1123
1124 } // namespace Text
1125
1126 } // namespace Toolkit
1127
1128 } // namespace Dali