dali-toolkit/internal/text/text-controller-impl-event-handler.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/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
 290   CharacterIndex& primaryCursorPosition         = eventData.mPrimaryCursorPosition;
 291   CharacterIndex  previousPrimaryCursorPosition = primaryCursorPosition;
 292
 293   if(Dali::DALI_KEY_CURSOR_LEFT == keyCode)
 294   {
 295     if(primaryCursorPosition > 0u)
 296     {
 297       if(!isShiftModifier && eventData.mDecorator->IsHighlightVisible())
 298       {
 299         primaryCursorPosition = std::min(eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 300       }
 301       else
 302       {
 303         primaryCursorPosition = impl.CalculateNewCursorIndex(primaryCursorPosition - 1u);
 304       }
 305     }
 306   }
 307   else if(Dali::DALI_KEY_CURSOR_RIGHT == keyCode)
 308   {
 309     if(logicalModel->mText.Count() > primaryCursorPosition)
 310     {
 311       if(!isShiftModifier && eventData.mDecorator->IsHighlightVisible())
 312       {
 313         primaryCursorPosition = std::max(eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 314       }
 315       else
 316       {
 317         primaryCursorPosition = impl.CalculateNewCursorIndex(primaryCursorPosition);
 318       }
 319     }
 320   }
 321   else if(Dali::DALI_KEY_CURSOR_UP == keyCode && !isShiftModifier)
 322   {
 323     // Ignore Shift-Up for text selection for now.
 324
 325     // Get first the line index of the current cursor position index.
 326     CharacterIndex characterIndex = 0u;
 327
 328     if(primaryCursorPosition > 0u)
 329     {
 330       characterIndex = primaryCursorPosition - 1u;
 331     }
 332
 333     const LineIndex lineIndex         = visualModel->GetLineOfCharacter(characterIndex);
 334     const LineIndex previousLineIndex = (lineIndex > 0 ? lineIndex - 1u : lineIndex);
 335
 336     // Retrieve the cursor position info.
 337     CursorInfo cursorInfo;
 338     impl.GetCursorPosition(primaryCursorPosition,
 339                            cursorInfo);
 340
 341     // Get the line above.
 342     const LineRun& line = *(visualModel->mLines.Begin() + previousLineIndex);
 343
 344     // Get the next hit 'y' point.
 345     const float hitPointY = cursorInfo.lineOffset - 0.5f * GetLineHeight(line);
 346
 347     // Use the cursor hook position 'x' and the next hit 'y' position to calculate the new cursor index.
 348     bool matchedCharacter = false;
 349     primaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 350                                                         logicalModel,
 351                                                         impl.mMetrics,
 352                                                         eventData.mCursorHookPositionX,
 353                                                         hitPointY,
 354                                                         CharacterHitTest::TAP,
 355                                                         matchedCharacter);
 356   }
 357   else if(Dali::DALI_KEY_CURSOR_DOWN == keyCode && !isShiftModifier)
 358   {
 359     // Ignore Shift-Down for text selection for now.
 360
 361     // Get first the line index of the current cursor position index.
 362     CharacterIndex characterIndex = 0u;
 363
 364     if(primaryCursorPosition > 0u)
 365     {
 366       characterIndex = primaryCursorPosition - 1u;
 367     }
 368
 369     const LineIndex lineIndex = visualModel->GetLineOfCharacter(characterIndex);
 370
 371     if(lineIndex + 1u < visualModel->mLines.Count())
 372     {
 373       // Retrieve the cursor position info.
 374       CursorInfo cursorInfo;
 375       impl.GetCursorPosition(primaryCursorPosition, cursorInfo);
 376
 377       // Get the line below.
 378       const LineRun& line = *(visualModel->mLines.Begin() + lineIndex + 1u);
 379
 380       // Get the next hit 'y' point.
 381       const float hitPointY = cursorInfo.lineOffset + cursorInfo.lineHeight + 0.5f * GetLineHeight(line);
 382
 383       // Use the cursor hook position 'x' and the next hit 'y' position to calculate the new cursor index.
 384       bool matchedCharacter = false;
 385       primaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 386                                                           logicalModel,
 387                                                           impl.mMetrics,
 388                                                           eventData.mCursorHookPositionX,
 389                                                           hitPointY,
 390                                                           CharacterHitTest::TAP,
 391                                                           matchedCharacter);
 392     }
 393   }
 394
 395   if(!isShiftModifier && eventData.mState != EventData::SELECTING)
 396   {
 397     // Update selection position after moving the cursor
 398     eventData.mLeftSelectionPosition  = primaryCursorPosition;
 399     eventData.mRightSelectionPosition = primaryCursorPosition;
 400   }
 401
 402   if(isShiftModifier && impl.IsShowingRealText() && eventData.mShiftSelectionFlag)
 403   {
 404     // Handle text selection
 405     bool selecting = false;
 406
 407     if(Dali::DALI_KEY_CURSOR_LEFT == keyCode || Dali::DALI_KEY_CURSOR_RIGHT == keyCode)
 408     {
 409       // Shift-Left/Right to select the text
 410       int cursorPositionDelta = primaryCursorPosition - previousPrimaryCursorPosition;
 411       if(cursorPositionDelta > 0 || eventData.mRightSelectionPosition > 0u) // Check the boundary
 412       {
 413         uint32_t oldStart = eventData.mLeftSelectionPosition;
 414         uint32_t oldEnd   = eventData.mRightSelectionPosition;
 415
 416         eventData.mRightSelectionPosition += cursorPositionDelta;
 417
 418         if(impl.mSelectableControlInterface != nullptr)
 419         {
 420           impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 421         }
 422       }
 423       selecting = true;
 424     }
 425     else if(eventData.mLeftSelectionPosition != eventData.mRightSelectionPosition)
 426     {
 427       // Show no grab handles and text highlight if Shift-Up/Down pressed but no selected text
 428       selecting = true;
 429     }
 430
 431     if(selecting)
 432     {
 433       // Notify the cursor position to the InputMethodContext.
 434       if(eventData.mInputMethodContext)
 435       {
 436         eventData.mInputMethodContext.SetCursorPosition(primaryCursorPosition);
 437         eventData.mInputMethodContext.NotifyCursorPosition();
 438       }
 439
 440       impl.ChangeState(EventData::SELECTING);
 441
 442       eventData.mUpdateLeftSelectionPosition  = true;
 443       eventData.mUpdateRightSelectionPosition = true;
 444       eventData.mUpdateGrabHandlePosition     = true;
 445       eventData.mUpdateHighlightBox           = true;
 446
 447       // Hide the text selection popup if select the text using keyboard instead of moving grab handles
 448       if(eventData.mGrabHandlePopupEnabled)
 449       {
 450         eventData.mDecorator->SetPopupActive(false);
 451       }
 452     }
 453   }
 454   else
 455   {
 456     // Handle normal cursor move
 457     impl.ChangeState(EventData::EDITING);
 458     eventData.mUpdateCursorPosition = true;
 459   }
 460
 461   eventData.mUpdateInputStyle          = true;
 462   eventData.mScrollAfterUpdatePosition = true;
 463 }
 464
 465 void ControllerImplEventHandler::OnTapEvent(Controller::Impl& impl, const Event& event)
 466 {
 467   if(impl.mEventData)
 468   {
 469     const unsigned int tapCount     = event.p1.mUint;
 470     EventData&         eventData    = *impl.mEventData;
 471     ModelPtr&          model        = impl.mModel;
 472     LogicalModelPtr&   logicalModel = model->mLogicalModel;
 473     VisualModelPtr&    visualModel  = model->mVisualModel;
 474
 475     if(1u == tapCount)
 476     {
 477       if(impl.IsShowingRealText())
 478       {
 479         // Convert from control's coords to text's coords.
 480         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 481         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 482
 483         // Keep the tap 'x' position. Used to move the cursor.
 484         eventData.mCursorHookPositionX = xPosition;
 485
 486         // Whether to touch point hits on a glyph.
 487         bool matchedCharacter            = false;
 488         eventData.mPrimaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 489                                                                        logicalModel,
 490                                                                        impl.mMetrics,
 491                                                                        xPosition,
 492                                                                        yPosition,
 493                                                                        CharacterHitTest::TAP,
 494                                                                        matchedCharacter);
 495
 496         // When the cursor position is changing, delay cursor blinking
 497         eventData.mDecorator->DelayCursorBlink();
 498       }
 499       else
 500       {
 501         eventData.mPrimaryCursorPosition = 0u;
 502       }
 503
 504       // Update selection position after tapping
 505       eventData.mLeftSelectionPosition  = eventData.mPrimaryCursorPosition;
 506       eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 507
 508       eventData.mUpdateCursorPosition      = true;
 509       eventData.mUpdateGrabHandlePosition  = true;
 510       eventData.mScrollAfterUpdatePosition = true;
 511       eventData.mUpdateInputStyle          = true;
 512
 513       // Notify the cursor position to the InputMethodContext.
 514       if(eventData.mInputMethodContext)
 515       {
 516         eventData.mInputMethodContext.SetCursorPosition(eventData.mPrimaryCursorPosition);
 517         eventData.mInputMethodContext.NotifyCursorPosition();
 518       }
 519     }
 520     else if(2u == tapCount)
 521     {
 522       if(eventData.mSelectionEnabled)
 523       {
 524         // Convert from control's coords to text's coords.
 525         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 526         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 527
 528         // Calculates the logical position from the x,y coords.
 529         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mDoubleTapAction);
 530       }
 531     }
 532   }
 533 }
 534
 535 void ControllerImplEventHandler::OnPanEvent(Controller::Impl& impl, const Event& event)
 536 {
 537   if(impl.mEventData)
 538   {
 539     EventData&    eventData = *impl.mEventData;
 540     DecoratorPtr& decorator = eventData.mDecorator;
 541
 542     const bool isHorizontalScrollEnabled = decorator->IsHorizontalScrollEnabled();
 543     const bool isVerticalScrollEnabled   = decorator->IsVerticalScrollEnabled();
 544
 545     if(!isHorizontalScrollEnabled && !isVerticalScrollEnabled)
 546     {
 547       // Nothing to do if scrolling is not enabled.
 548       return;
 549     }
 550
 551     const GestureState state = static_cast<GestureState>(event.p1.mInt);
 552     switch(state)
 553     {
 554       case GestureState::STARTED:
 555       {
 556         // Will remove the cursor, handles or text's popup, ...
 557         impl.ChangeState(EventData::TEXT_PANNING);
 558         break;
 559       }
 560       case GestureState::CONTINUING:
 561       {
 562         ModelPtr& model = impl.mModel;
 563
 564         const Vector2& layoutSize     = model->mVisualModel->GetLayoutSize();
 565         Vector2&       scrollPosition = model->mScrollPosition;
 566         const Vector2  currentScroll  = scrollPosition;
 567
 568         if(isHorizontalScrollEnabled)
 569         {
 570           const float displacementX = event.p2.mFloat;
 571           scrollPosition.x += displacementX;
 572
 573           impl.ClampHorizontalScroll(layoutSize);
 574         }
 575
 576         if(isVerticalScrollEnabled)
 577         {
 578           const float displacementY = event.p3.mFloat;
 579           scrollPosition.y += displacementY;
 580
 581           impl.ClampVerticalScroll(layoutSize);
 582         }
 583
 584         decorator->UpdatePositions(scrollPosition - currentScroll);
 585         break;
 586       }
 587       case GestureState::FINISHED:
 588       case GestureState::CANCELLED: // FALLTHROUGH
 589       {
 590         // Will go back to the previous state to show the cursor, handles, the text's popup, ...
 591         impl.ChangeState(eventData.mPreviousState);
 592         break;
 593       }
 594       default:
 595         break;
 596     }
 597   }
 598 }
 599
 600 void ControllerImplEventHandler::OnLongPressEvent(Controller::Impl& impl, const Event& event)
 601 {
 602   DALI_LOG_INFO(gLogFilter, Debug::General, "Controller::OnLongPressEvent\n");
 603
 604   if(impl.mEventData)
 605   {
 606     EventData& eventData = *impl.mEventData;
 607
 608     if(!impl.IsShowingRealText() && (EventData::EDITING == eventData.mState))
 609     {
 610       impl.ChangeState(EventData::EDITING_WITH_POPUP);
 611       eventData.mDecoratorUpdated = true;
 612       eventData.mUpdateInputStyle = true;
 613     }
 614     else
 615     {
 616       if(eventData.mSelectionEnabled)
 617       {
 618         ModelPtr& model = impl.mModel;
 619
 620         // Convert from control's coords to text's coords.
 621         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 622         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 623
 624         // Calculates the logical position from the x,y coords.
 625         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mLongPressAction);
 626       }
 627     }
 628   }
 629 }
 630
 631 void ControllerImplEventHandler::OnHandleEvent(Controller::Impl& impl, const Event& event)
 632 {
 633   if(impl.mEventData)
 634   {
 635     const unsigned int state                    = event.p1.mUint;
 636     const bool         handleStopScrolling      = (HANDLE_STOP_SCROLLING == state);
 637     const bool         isSmoothHandlePanEnabled = impl.mEventData->mDecorator->IsSmoothHandlePanEnabled();
 638
 639     if(HANDLE_PRESSED == state)
 640     {
 641       OnHandlePressed(impl, event, isSmoothHandlePanEnabled);
 642     } // end ( HANDLE_PRESSED == state )
 643     else if((HANDLE_RELEASED == state) ||
 644             handleStopScrolling)
 645     {
 646       OnHandleReleased(impl, event, isSmoothHandlePanEnabled, handleStopScrolling);
 647     } // end ( ( HANDLE_RELEASED == state ) || ( HANDLE_STOP_SCROLLING == state ) )
 648     else if(HANDLE_SCROLLING == state)
 649     {
 650       OnHandleScrolling(impl, event, isSmoothHandlePanEnabled);
 651     } // end ( HANDLE_SCROLLING == state )
 652   }
 653 }
 654
 655 void ControllerImplEventHandler::OnSelectEvent(Controller::Impl& impl, const Event& event)
 656 {
 657   if(impl.mEventData && impl.mEventData->mSelectionEnabled)
 658   {
 659     ModelPtr&      model          = impl.mModel;
 660     const Vector2& scrollPosition = model->mScrollPosition;
 661
 662     // Convert from control's coords to text's coords.
 663     const float xPosition = event.p2.mFloat - scrollPosition.x;
 664     const float yPosition = event.p3.mFloat - scrollPosition.y;
 665
 666     // Calculates the logical position from the x,y coords.
 667     impl.RepositionSelectionHandles(xPosition, yPosition, Controller::NoTextTap::HIGHLIGHT);
 668   }
 669 }
 670
 671 void ControllerImplEventHandler::OnSelectAllEvent(Controller::Impl& impl)
 672 {
 673   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectAllEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 674
 675   if(impl.mEventData)
 676   {
 677     EventData& eventData = *impl.mEventData;
 678     if(eventData.mSelectionEnabled && eventData.mState != EventData::INACTIVE)
 679     {
 680       ModelPtr&      model          = impl.mModel;
 681       const Vector2& scrollPosition = model->mScrollPosition;
 682
 683       // Calculates the logical position from the start.
 684       impl.RepositionSelectionHandles(0.f - scrollPosition.x,
 685                                       0.f - scrollPosition.y,
 686                                       Controller::NoTextTap::HIGHLIGHT);
 687
 688       uint32_t oldStart = eventData.mLeftSelectionPosition;
 689       uint32_t oldEnd   = eventData.mRightSelectionPosition;
 690
 691       eventData.mLeftSelectionPosition  = 0u;
 692       eventData.mRightSelectionPosition = model->mLogicalModel->mText.Count();
 693
 694       if(impl.mSelectableControlInterface != nullptr)
 695       {
 696         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 697       }
 698     }
 699   }
 700 }
 701
 702 void ControllerImplEventHandler::OnSelectNoneEvent(Controller::Impl& impl)
 703 {
 704   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectNoneEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 705
 706   if(impl.mEventData)
 707   {
 708     EventData& eventData = *impl.mEventData;
 709     if(eventData.mSelectionEnabled && eventData.mState == EventData::SELECTING)
 710     {
 711       uint32_t oldStart                = eventData.mLeftSelectionPosition;
 712       uint32_t oldEnd                  = eventData.mRightSelectionPosition;
 713
 714       eventData.mLeftSelectionPosition = eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 715       impl.ChangeState(EventData::EDITING);
 716       eventData.mUpdateCursorPosition      = true;
 717       eventData.mUpdateInputStyle          = true;
 718       eventData.mScrollAfterUpdatePosition = true;
 719
 720       if(impl.mSelectableControlInterface != nullptr)
 721       {
 722         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 723       }
 724     }
 725   }
 726 }
 727
 728 void ControllerImplEventHandler::OnSelectRangeEvent(Controller::Impl& impl, const Event& event)
 729 {
 730   if(impl.mEventData && impl.mEventData->mSelectionEnabled && impl.mEventData->mState != EventData::INACTIVE)
 731   {
 732     ModelPtr&      model          = impl.mModel;
 733     const Vector2& scrollPosition = model->mScrollPosition;
 734
 735     // Calculate the selection index.
 736     const uint32_t length = static_cast<uint32_t>(model->mLogicalModel->mText.Count());
 737     const uint32_t start  = std::min(event.p2.mUint, length);
 738     const uint32_t end    = std::min(event.p3.mUint, length);
 739
 740     if(start != end)
 741     {
 742       uint32_t oldStart = impl.mEventData->mLeftSelectionPosition;
 743       uint32_t oldEnd   = impl.mEventData->mRightSelectionPosition;
 744
 745       // Calculates the logical position from the x,y coords.
 746       impl.RepositionSelectionHandles(0.f - scrollPosition.x, 0.f - scrollPosition.y, Controller::NoTextTap::HIGHLIGHT);
 747
 748       impl.mEventData->mLeftSelectionPosition  = start;
 749       impl.mEventData->mRightSelectionPosition = end;
 750
 751       if(impl.mSelectableControlInterface != nullptr)
 752       {
 753         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, start, end);
 754       }
 755     }
 756   }
 757 }
 758
 759 void ControllerImplEventHandler::OnHandlePressed(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 760 {
 761   ModelPtr&      model          = impl.mModel;
 762   const Vector2& scrollPosition = model->mScrollPosition;
 763
 764   // Convert from decorator's coords to text's coords.
 765   const float xPosition = event.p2.mFloat - scrollPosition.x;
 766   const float yPosition = event.p3.mFloat - scrollPosition.y;
 767
 768   // Need to calculate the handle's new position.
 769   bool                 matchedCharacter  = false;
 770   const CharacterIndex handleNewPosition = Text::GetClosestCursorIndex(model->mVisualModel,
 771                                                                        model->mLogicalModel,
 772                                                                        impl.mMetrics,
 773                                                                        xPosition,
 774                                                                        yPosition,
 775                                                                        CharacterHitTest::SCROLL,
 776                                                                        matchedCharacter);
 777
 778   EventData& eventData = *impl.mEventData;
 779   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 780   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 781
 782   if(Event::GRAB_HANDLE_EVENT == event.type)
 783   {
 784     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
 785
 786     if(handleNewPosition != eventData.mPrimaryCursorPosition)
 787     {
 788       // Updates the cursor position if the handle's new position is different than the current one.
 789       eventData.mUpdateCursorPosition = true;
 790       // Does not update the grab handle position if the smooth panning is enabled. (The decorator does it smooth).
 791       eventData.mUpdateGrabHandlePosition = !isSmoothHandlePanEnabled;
 792       eventData.mPrimaryCursorPosition    = handleNewPosition;
 793     }
 794
 795     // 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.
 796     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 797   }
 798   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 799   {
 800     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 801
 802     if((handleNewPosition != eventData.mLeftSelectionPosition) &&
 803        (handleNewPosition != eventData.mRightSelectionPosition))
 804     {
 805       // Updates the highlight box if the handle's new position is different than the current one.
 806       eventData.mUpdateHighlightBox = true;
 807       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 808       eventData.mUpdateLeftSelectionPosition = !isSmoothHandlePanEnabled;
 809       eventData.mLeftSelectionPosition       = handleNewPosition;
 810     }
 811
 812     // 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.
 813     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 814
 815     // Will define the order to scroll the text to match the handle position.
 816     eventData.mIsLeftHandleSelected  = true;
 817     eventData.mIsRightHandleSelected = false;
 818   }
 819   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 820   {
 821     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 822
 823     if((handleNewPosition != eventData.mRightSelectionPosition) &&
 824        (handleNewPosition != eventData.mLeftSelectionPosition))
 825     {
 826       // Updates the highlight box if the handle's new position is different than the current one.
 827       eventData.mUpdateHighlightBox = true;
 828       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 829       eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
 830       eventData.mRightSelectionPosition       = handleNewPosition;
 831     }
 832
 833     // 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.
 834     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 835
 836     // Will define the order to scroll the text to match the handle position.
 837     eventData.mIsLeftHandleSelected  = false;
 838     eventData.mIsRightHandleSelected = true;
 839   }
 840
 841   if((impl.mSelectableControlInterface != nullptr) && ((oldStart != eventData.mLeftSelectionPosition) || (oldEnd != eventData.mRightSelectionPosition)))
 842   {
 843     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 844   }
 845 }
 846
 847 void ControllerImplEventHandler::OnHandleReleased(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled, const bool handleStopScrolling)
 848 {
 849   CharacterIndex handlePosition = 0u;
 850   if(handleStopScrolling || isSmoothHandlePanEnabled)
 851   {
 852     ModelPtr&      model          = impl.mModel;
 853     const Vector2& scrollPosition = model->mScrollPosition;
 854
 855     // Convert from decorator's coords to text's coords.
 856     const float xPosition = event.p2.mFloat - scrollPosition.x;
 857     const float yPosition = event.p3.mFloat - scrollPosition.y;
 858
 859     bool matchedCharacter = false;
 860     handlePosition        = Text::GetClosestCursorIndex(model->mVisualModel,
 861                                                  model->mLogicalModel,
 862                                                  impl.mMetrics,
 863                                                  xPosition,
 864                                                  yPosition,
 865                                                  CharacterHitTest::SCROLL,
 866                                                  matchedCharacter);
 867   }
 868
 869   EventData& eventData = *impl.mEventData;
 870   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 871   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 872
 873   if(Event::GRAB_HANDLE_EVENT == event.type)
 874   {
 875     eventData.mUpdateCursorPosition     = true;
 876     eventData.mUpdateGrabHandlePosition = true;
 877     eventData.mUpdateInputStyle         = true;
 878
 879     if(!impl.IsClipboardEmpty())
 880     {
 881       impl.ChangeState(EventData::EDITING_WITH_PASTE_POPUP); // Moving grabhandle will show Paste Popup
 882     }
 883
 884     if(handleStopScrolling || isSmoothHandlePanEnabled)
 885     {
 886       eventData.mScrollAfterUpdatePosition = true;
 887       eventData.mPrimaryCursorPosition     = handlePosition;
 888     }
 889   }
 890   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 891   {
 892     impl.ChangeState(EventData::SELECTING);
 893
 894     eventData.mUpdateHighlightBox           = true;
 895     eventData.mUpdateLeftSelectionPosition  = true;
 896     eventData.mUpdateRightSelectionPosition = true;
 897
 898     if(handleStopScrolling || isSmoothHandlePanEnabled)
 899     {
 900       eventData.mScrollAfterUpdatePosition = true;
 901
 902       if((handlePosition != eventData.mRightSelectionPosition) &&
 903          (handlePosition != eventData.mLeftSelectionPosition))
 904       {
 905         eventData.mLeftSelectionPosition = handlePosition;
 906       }
 907     }
 908   }
 909   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 910   {
 911     impl.ChangeState(EventData::SELECTING);
 912
 913     eventData.mUpdateHighlightBox           = true;
 914     eventData.mUpdateRightSelectionPosition = true;
 915     eventData.mUpdateLeftSelectionPosition  = true;
 916
 917     if(handleStopScrolling || isSmoothHandlePanEnabled)
 918     {
 919       eventData.mScrollAfterUpdatePosition = true;
 920       if((handlePosition != eventData.mRightSelectionPosition) &&
 921          (handlePosition != eventData.mLeftSelectionPosition))
 922       {
 923         eventData.mRightSelectionPosition = handlePosition;
 924       }
 925     }
 926   }
 927
 928   if((impl.mSelectableControlInterface != nullptr) && ((oldStart != eventData.mLeftSelectionPosition) || (oldEnd != eventData.mRightSelectionPosition)))
 929   {
 930     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 931   }
 932
 933   eventData.mDecoratorUpdated = true;
 934 }
 935
 936 void ControllerImplEventHandler::OnHandleScrolling(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 937 {
 938   ModelPtr&       model          = impl.mModel;
 939   Vector2&        scrollPosition = model->mScrollPosition;
 940   VisualModelPtr& visualModel    = model->mVisualModel;
 941
 942   const float    xSpeed                = event.p2.mFloat;
 943   const float    ySpeed                = event.p3.mFloat;
 944   const Vector2& layoutSize            = visualModel->GetLayoutSize();
 945   const Vector2  currentScrollPosition = scrollPosition;
 946
 947   scrollPosition.x += xSpeed;
 948   scrollPosition.y += ySpeed;
 949
 950   impl.ClampHorizontalScroll(layoutSize);
 951   impl.ClampVerticalScroll(layoutSize);
 952
 953   EventData&    eventData = *impl.mEventData;
 954   DecoratorPtr& decorator = eventData.mDecorator;
 955
 956   bool endOfScroll = false;
 957   if(Vector2::ZERO == (currentScrollPosition - scrollPosition))
 958   {
 959     // Notify the decorator there is no more text to scroll.
 960     // The decorator won't send more scroll events.
 961     decorator->NotifyEndOfScroll();
 962     // Still need to set the position of the handle.
 963     endOfScroll = true;
 964   }
 965
 966   // Set the position of the handle.
 967   const bool scrollRightDirection      = xSpeed > 0.f;
 968   const bool scrollBottomDirection     = ySpeed > 0.f;
 969   const bool leftSelectionHandleEvent  = Event::LEFT_SELECTION_HANDLE_EVENT == event.type;
 970   const bool rightSelectionHandleEvent = Event::RIGHT_SELECTION_HANDLE_EVENT == event.type;
 971
 972   if(Event::GRAB_HANDLE_EVENT == event.type)
 973   {
 974     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
 975
 976     // Get the grab handle position in decorator coords.
 977     Vector2 position = decorator->GetPosition(GRAB_HANDLE);
 978
 979     if(decorator->IsHorizontalScrollEnabled())
 980     {
 981       // Position the grag handle close to either the left or right edge.
 982       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
 983     }
 984
 985     if(decorator->IsVerticalScrollEnabled())
 986     {
 987       position.x = eventData.mCursorHookPositionX;
 988
 989       // Position the grag handle close to either the top or bottom edge.
 990       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
 991     }
 992
 993     // Get the new handle position.
 994     // The grab handle's position is in decorator's coords. Need to transforms to text's coords.
 995     bool                 matchedCharacter = false;
 996     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
 997                                                                       impl.mModel->mLogicalModel,
 998                                                                       impl.mMetrics,
 999                                                                       position.x - scrollPosition.x,
1000                                                                       position.y - scrollPosition.y,
1001                                                                       CharacterHitTest::SCROLL,
1002                                                                       matchedCharacter);
1003
1004     if(eventData.mPrimaryCursorPosition != handlePosition)
1005     {
1006       eventData.mUpdateCursorPosition      = true;
1007       eventData.mUpdateGrabHandlePosition  = !isSmoothHandlePanEnabled;
1008       eventData.mScrollAfterUpdatePosition = true;
1009       eventData.mPrimaryCursorPosition     = handlePosition;
1010     }
1011     eventData.mUpdateInputStyle = eventData.mUpdateCursorPosition;
1012
1013     // Updates the decorator if the soft handle panning is enabled.
1014     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
1015   }
1016   else if(leftSelectionHandleEvent || rightSelectionHandleEvent)
1017   {
1018     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
1019
1020     // Get the selection handle position in decorator coords.
1021     Vector2 position = decorator->GetPosition(leftSelectionHandleEvent ? Text::LEFT_SELECTION_HANDLE : Text::RIGHT_SELECTION_HANDLE);
1022
1023     if(decorator->IsHorizontalScrollEnabled())
1024     {
1025       // Position the selection handle close to either the left or right edge.
1026       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
1027     }
1028
1029     if(decorator->IsVerticalScrollEnabled())
1030     {
1031       position.x = eventData.mCursorHookPositionX;
1032
1033       // Position the grag handle close to either the top or bottom edge.
1034       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1035     }
1036
1037     // Get the new handle position.
1038     // The selection handle's position is in decorator's coords. Need to transform to text's coords.
1039     bool                 matchedCharacter = false;
1040     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1041                                                                       impl.mModel->mLogicalModel,
1042                                                                       impl.mMetrics,
1043                                                                       position.x - scrollPosition.x,
1044                                                                       position.y - scrollPosition.y,
1045                                                                       CharacterHitTest::SCROLL,
1046                                                                       matchedCharacter);
1047     uint32_t             oldStart         = eventData.mLeftSelectionPosition;
1048     uint32_t             oldEnd           = eventData.mRightSelectionPosition;
1049
1050     if(leftSelectionHandleEvent)
1051     {
1052       const bool differentHandles = (eventData.mLeftSelectionPosition != handlePosition) && (eventData.mRightSelectionPosition != handlePosition);
1053
1054       if(differentHandles || endOfScroll)
1055       {
1056         eventData.mUpdateHighlightBox           = true;
1057         eventData.mUpdateLeftSelectionPosition  = !isSmoothHandlePanEnabled;
1058         eventData.mUpdateRightSelectionPosition = isSmoothHandlePanEnabled;
1059         eventData.mLeftSelectionPosition        = handlePosition;
1060       }
1061     }
1062     else
1063     {
1064       const bool differentHandles = (eventData.mRightSelectionPosition != handlePosition) && (eventData.mLeftSelectionPosition != handlePosition);
1065       if(differentHandles || endOfScroll)
1066       {
1067         eventData.mUpdateHighlightBox           = true;
1068         eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
1069         eventData.mUpdateLeftSelectionPosition  = isSmoothHandlePanEnabled;
1070         eventData.mRightSelectionPosition       = handlePosition;
1071       }
1072     }
1073
1074     if(eventData.mUpdateLeftSelectionPosition || eventData.mUpdateRightSelectionPosition)
1075     {
1076       impl.RepositionSelectionHandles();
1077
1078       eventData.mScrollAfterUpdatePosition = !isSmoothHandlePanEnabled;
1079
1080       if(impl.mSelectableControlInterface != nullptr)
1081       {
1082         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
1083       }
1084     }
1085   }
1086   eventData.mDecoratorUpdated = true;
1087 }
1088
1089 } // namespace Text
1090
1091 } // namespace Toolkit
1092
1093 } // namespace Dali