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   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
 338     // Retrieve the cursor position info.
 339     CursorInfo cursorInfo;
 340     impl.GetCursorPosition(primaryCursorPosition,
 341                            cursorInfo);
 342
 343     // Get the line above.
 344     const LineRun& line = *(visualModel->mLines.Begin() + previousLineIndex);
 345
 346     // Get the next hit 'y' point.
 347     const float hitPointY = cursorInfo.lineOffset - 0.5f * GetLineHeight(line);
 348
 349     // Use the cursor hook position 'x' and the next hit 'y' position to calculate the new cursor index.
 350     bool matchedCharacter = false;
 351     primaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 352                                                         logicalModel,
 353                                                         impl.mMetrics,
 354                                                         eventData.mCursorHookPositionX,
 355                                                         hitPointY,
 356                                                         CharacterHitTest::TAP,
 357                                                         matchedCharacter);
 358   }
 359   else if(Dali::DALI_KEY_CURSOR_DOWN == keyCode && !isShiftModifier)
 360   {
 361     // Ignore Shift-Down for text selection for now.
 362
 363     // Get first the line index of the current cursor position index.
 364     CharacterIndex characterIndex = 0u;
 365
 366     if(primaryCursorPosition > 0u)
 367     {
 368       characterIndex = primaryCursorPosition - 1u;
 369     }
 370
 371     const LineIndex lineIndex = visualModel->GetLineOfCharacter(characterIndex);
 372
 373     if(lineIndex + 1u < visualModel->mLines.Count())
 374     {
 375       // Retrieve the cursor position info.
 376       CursorInfo cursorInfo;
 377       impl.GetCursorPosition(primaryCursorPosition, cursorInfo);
 378
 379       // Get the line below.
 380       const LineRun& line = *(visualModel->mLines.Begin() + lineIndex + 1u);
 381
 382       // Get the next hit 'y' point.
 383       const float hitPointY = cursorInfo.lineOffset + cursorInfo.lineHeight + 0.5f * GetLineHeight(line);
 384
 385       // Use the cursor hook position 'x' and the next hit 'y' position to calculate the new cursor index.
 386       bool matchedCharacter = false;
 387       primaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 388                                                           logicalModel,
 389                                                           impl.mMetrics,
 390                                                           eventData.mCursorHookPositionX,
 391                                                           hitPointY,
 392                                                           CharacterHitTest::TAP,
 393                                                           matchedCharacter);
 394     }
 395   }
 396
 397   if(!isShiftModifier && eventData.mState != EventData::SELECTING)
 398   {
 399     // Update selection position after moving the cursor
 400     eventData.mLeftSelectionPosition  = primaryCursorPosition;
 401     eventData.mRightSelectionPosition = primaryCursorPosition;
 402
 403     if(impl.mSelectableControlInterface != nullptr && eventData.mDecorator->IsHighlightVisible())
 404     {
 405       impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 406     }
 407   }
 408
 409   if(isShiftModifier && impl.IsShowingRealText() && eventData.mShiftSelectionFlag)
 410   {
 411     // Handle text selection
 412     bool selecting = false;
 413
 414     if(Dali::DALI_KEY_CURSOR_LEFT == keyCode || Dali::DALI_KEY_CURSOR_RIGHT == keyCode)
 415     {
 416       // Shift-Left/Right to select the text
 417       int cursorPositionDelta = primaryCursorPosition - previousPrimaryCursorPosition;
 418       if(cursorPositionDelta > 0 || eventData.mRightSelectionPosition > 0u) // Check the boundary
 419       {
 420         eventData.mRightSelectionPosition += cursorPositionDelta;
 421
 422         if(impl.mSelectableControlInterface != nullptr)
 423         {
 424           impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 425         }
 426       }
 427       selecting = true;
 428     }
 429     else if(eventData.mLeftSelectionPosition != eventData.mRightSelectionPosition)
 430     {
 431       // Show no grab handles and text highlight if Shift-Up/Down pressed but no selected text
 432       selecting = true;
 433     }
 434
 435     if(selecting)
 436     {
 437       // Notify the cursor position to the InputMethodContext.
 438       if(eventData.mInputMethodContext)
 439       {
 440         eventData.mInputMethodContext.SetCursorPosition(primaryCursorPosition);
 441         eventData.mInputMethodContext.NotifyCursorPosition();
 442       }
 443
 444       impl.ChangeState(EventData::SELECTING);
 445
 446       eventData.mUpdateLeftSelectionPosition  = true;
 447       eventData.mUpdateRightSelectionPosition = true;
 448       eventData.mUpdateGrabHandlePosition     = true;
 449       eventData.mUpdateHighlightBox           = true;
 450
 451       // Hide the text selection popup if select the text using keyboard instead of moving grab handles
 452       if(eventData.mGrabHandlePopupEnabled)
 453       {
 454         eventData.mDecorator->SetPopupActive(false);
 455       }
 456     }
 457   }
 458   else
 459   {
 460     // Handle normal cursor move
 461     impl.ChangeState(EventData::EDITING);
 462     eventData.mUpdateCursorPosition = true;
 463   }
 464
 465   eventData.mUpdateInputStyle          = true;
 466   eventData.mScrollAfterUpdatePosition = true;
 467 }
 468
 469 void ControllerImplEventHandler::OnTapEvent(Controller::Impl& impl, const Event& event)
 470 {
 471   if(impl.mEventData)
 472   {
 473     const unsigned int tapCount     = event.p1.mUint;
 474     EventData&         eventData    = *impl.mEventData;
 475     ModelPtr&          model        = impl.mModel;
 476     LogicalModelPtr&   logicalModel = model->mLogicalModel;
 477     VisualModelPtr&    visualModel  = model->mVisualModel;
 478
 479     if(1u == tapCount)
 480     {
 481       if(impl.IsShowingRealText())
 482       {
 483         // Convert from control's coords to text's coords.
 484         const float xPosition   = event.p2.mFloat - model->mScrollPosition.x;
 485         const float yPosition   = event.p3.mFloat - model->mScrollPosition.y;
 486         uint32_t    oldSelStart = eventData.mLeftSelectionPosition;
 487         uint32_t    oldSelEnd   = eventData.mRightSelectionPosition;
 488
 489         // Keep the tap 'x' position. Used to move the cursor.
 490         eventData.mCursorHookPositionX = xPosition;
 491
 492         // Whether to touch point hits on a glyph.
 493         bool matchedCharacter            = false;
 494         eventData.mPrimaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 495                                                                        logicalModel,
 496                                                                        impl.mMetrics,
 497                                                                        xPosition,
 498                                                                        yPosition,
 499                                                                        CharacterHitTest::TAP,
 500                                                                        matchedCharacter);
 501
 502         if(impl.mSelectableControlInterface != nullptr && eventData.mDecorator->IsHighlightVisible())
 503         {
 504           impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mPrimaryCursorPosition, eventData.mPrimaryCursorPosition);
 505         }
 506
 507         // When the cursor position is changing, delay cursor blinking
 508         eventData.mDecorator->DelayCursorBlink();
 509       }
 510       else
 511       {
 512         eventData.mPrimaryCursorPosition = 0u;
 513       }
 514
 515       // Update selection position after tapping
 516       eventData.mLeftSelectionPosition  = eventData.mPrimaryCursorPosition;
 517       eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 518
 519       eventData.mUpdateCursorPosition      = true;
 520       eventData.mUpdateGrabHandlePosition  = true;
 521       eventData.mScrollAfterUpdatePosition = true;
 522       eventData.mUpdateInputStyle          = true;
 523
 524       // Notify the cursor position to the InputMethodContext.
 525       if(eventData.mInputMethodContext)
 526       {
 527         eventData.mInputMethodContext.SetCursorPosition(eventData.mPrimaryCursorPosition);
 528         eventData.mInputMethodContext.NotifyCursorPosition();
 529       }
 530     }
 531     else if(2u == tapCount)
 532     {
 533       if(eventData.mSelectionEnabled)
 534       {
 535         // Convert from control's coords to text's coords.
 536         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 537         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 538
 539         // Calculates the logical position from the x,y coords.
 540         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mDoubleTapAction);
 541       }
 542     }
 543   }
 544 }
 545
 546 void ControllerImplEventHandler::OnPanEvent(Controller::Impl& impl, const Event& event)
 547 {
 548   if(impl.mEventData)
 549   {
 550     EventData&    eventData = *impl.mEventData;
 551     DecoratorPtr& decorator = eventData.mDecorator;
 552
 553     const bool isHorizontalScrollEnabled = decorator->IsHorizontalScrollEnabled();
 554     const bool isVerticalScrollEnabled   = decorator->IsVerticalScrollEnabled();
 555
 556     if(!isHorizontalScrollEnabled && !isVerticalScrollEnabled)
 557     {
 558       // Nothing to do if scrolling is not enabled.
 559       return;
 560     }
 561
 562     const GestureState state = static_cast<GestureState>(event.p1.mInt);
 563     switch(state)
 564     {
 565       case GestureState::STARTED:
 566       {
 567         // Will remove the cursor, handles or text's popup, ...
 568         impl.ChangeState(EventData::TEXT_PANNING);
 569         break;
 570       }
 571       case GestureState::CONTINUING:
 572       {
 573         ModelPtr& model = impl.mModel;
 574
 575         const Vector2& layoutSize     = model->mVisualModel->GetLayoutSize();
 576         Vector2&       scrollPosition = model->mScrollPosition;
 577         const Vector2  currentScroll  = scrollPosition;
 578
 579         if(isHorizontalScrollEnabled)
 580         {
 581           const float displacementX = event.p2.mFloat;
 582           scrollPosition.x += displacementX;
 583
 584           impl.ClampHorizontalScroll(layoutSize);
 585         }
 586
 587         if(isVerticalScrollEnabled)
 588         {
 589           const float displacementY = event.p3.mFloat;
 590           scrollPosition.y += displacementY;
 591
 592           impl.ClampVerticalScroll(layoutSize);
 593         }
 594
 595         decorator->UpdatePositions(scrollPosition - currentScroll);
 596         break;
 597       }
 598       case GestureState::FINISHED:
 599       case GestureState::CANCELLED: // FALLTHROUGH
 600       {
 601         // Will go back to the previous state to show the cursor, handles, the text's popup, ...
 602         impl.ChangeState(eventData.mPreviousState);
 603         break;
 604       }
 605       default:
 606         break;
 607     }
 608   }
 609 }
 610
 611 void ControllerImplEventHandler::OnLongPressEvent(Controller::Impl& impl, const Event& event)
 612 {
 613   DALI_LOG_INFO(gLogFilter, Debug::General, "Controller::OnLongPressEvent\n");
 614
 615   if(impl.mEventData)
 616   {
 617     EventData& eventData = *impl.mEventData;
 618
 619     if(!impl.IsShowingRealText() && (EventData::EDITING == eventData.mState))
 620     {
 621       impl.ChangeState(EventData::EDITING_WITH_POPUP);
 622       eventData.mDecoratorUpdated = true;
 623       eventData.mUpdateInputStyle = true;
 624     }
 625     else
 626     {
 627       if(eventData.mSelectionEnabled)
 628       {
 629         ModelPtr& model = impl.mModel;
 630
 631         // Convert from control's coords to text's coords.
 632         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 633         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 634
 635         // Calculates the logical position from the x,y coords.
 636         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mLongPressAction);
 637       }
 638     }
 639   }
 640 }
 641
 642 void ControllerImplEventHandler::OnHandleEvent(Controller::Impl& impl, const Event& event)
 643 {
 644   if(impl.mEventData)
 645   {
 646     const unsigned int state                    = event.p1.mUint;
 647     const bool         handleStopScrolling      = (HANDLE_STOP_SCROLLING == state);
 648     const bool         isSmoothHandlePanEnabled = impl.mEventData->mDecorator->IsSmoothHandlePanEnabled();
 649
 650     if(HANDLE_PRESSED == state)
 651     {
 652       OnHandlePressed(impl, event, isSmoothHandlePanEnabled);
 653     } // end ( HANDLE_PRESSED == state )
 654     else if((HANDLE_RELEASED == state) ||
 655             handleStopScrolling)
 656     {
 657       OnHandleReleased(impl, event, isSmoothHandlePanEnabled, handleStopScrolling);
 658     } // end ( ( HANDLE_RELEASED == state ) || ( HANDLE_STOP_SCROLLING == state ) )
 659     else if(HANDLE_SCROLLING == state)
 660     {
 661       OnHandleScrolling(impl, event, isSmoothHandlePanEnabled);
 662     } // end ( HANDLE_SCROLLING == state )
 663   }
 664 }
 665
 666 void ControllerImplEventHandler::OnSelectEvent(Controller::Impl& impl, const Event& event)
 667 {
 668   if(impl.mEventData && impl.mEventData->mSelectionEnabled)
 669   {
 670     ModelPtr&      model          = impl.mModel;
 671     const Vector2& scrollPosition = model->mScrollPosition;
 672
 673     // Convert from control's coords to text's coords.
 674     const float xPosition = event.p2.mFloat - scrollPosition.x;
 675     const float yPosition = event.p3.mFloat - scrollPosition.y;
 676
 677     // Calculates the logical position from the x,y coords.
 678     impl.RepositionSelectionHandles(xPosition, yPosition, Controller::NoTextTap::HIGHLIGHT);
 679   }
 680 }
 681
 682 void ControllerImplEventHandler::OnSelectAllEvent(Controller::Impl& impl)
 683 {
 684   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectAllEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 685
 686   if(impl.mEventData)
 687   {
 688     EventData& eventData = *impl.mEventData;
 689     if(eventData.mSelectionEnabled && eventData.mState != EventData::INACTIVE)
 690     {
 691       ModelPtr&      model          = impl.mModel;
 692       const Vector2& scrollPosition = model->mScrollPosition;
 693
 694       // Calculates the logical position from the start.
 695       impl.RepositionSelectionHandles(0.f - scrollPosition.x,
 696                                       0.f - scrollPosition.y,
 697                                       Controller::NoTextTap::HIGHLIGHT);
 698
 699       uint32_t oldStart = eventData.mLeftSelectionPosition;
 700       uint32_t oldEnd   = eventData.mRightSelectionPosition;
 701
 702       eventData.mLeftSelectionPosition  = 0u;
 703       eventData.mRightSelectionPosition = model->mLogicalModel->mText.Count();
 704
 705       if(impl.mSelectableControlInterface != nullptr)
 706       {
 707         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 708       }
 709     }
 710   }
 711 }
 712
 713 void ControllerImplEventHandler::OnSelectNoneEvent(Controller::Impl& impl)
 714 {
 715   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectNoneEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 716
 717   if(impl.mEventData)
 718   {
 719     EventData& eventData = *impl.mEventData;
 720     if(eventData.mSelectionEnabled && eventData.mState == EventData::SELECTING)
 721     {
 722       eventData.mPrimaryCursorPosition = 0u;
 723       uint32_t oldStart                = eventData.mLeftSelectionPosition;
 724       uint32_t oldEnd                  = eventData.mRightSelectionPosition;
 725
 726       eventData.mLeftSelectionPosition = eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 727       impl.ChangeState(EventData::INACTIVE);
 728       eventData.mUpdateCursorPosition      = true;
 729       eventData.mUpdateInputStyle          = true;
 730       eventData.mScrollAfterUpdatePosition = true;
 731
 732       if(impl.mSelectableControlInterface != nullptr)
 733       {
 734         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 735       }
 736     }
 737   }
 738 }
 739
 740 void ControllerImplEventHandler::OnSelectRangeEvent(Controller::Impl& impl, const Event& event)
 741 {
 742   if(impl.mEventData && impl.mEventData->mSelectionEnabled && impl.mEventData->mState != EventData::INACTIVE)
 743   {
 744     ModelPtr&      model          = impl.mModel;
 745     const Vector2& scrollPosition = model->mScrollPosition;
 746
 747     // Calculate the selection index.
 748     const uint32_t length = static_cast<uint32_t>(model->mLogicalModel->mText.Count());
 749     const uint32_t start  = std::min(event.p2.mUint, length);
 750     const uint32_t end    = std::min(event.p3.mUint, length);
 751
 752     if(start != end)
 753     {
 754       uint32_t oldStart = impl.mEventData->mLeftSelectionPosition;
 755       uint32_t oldEnd   = impl.mEventData->mRightSelectionPosition;
 756
 757       // Calculates the logical position from the x,y coords.
 758       impl.RepositionSelectionHandles(0.f - scrollPosition.x, 0.f - scrollPosition.y, Controller::NoTextTap::HIGHLIGHT);
 759
 760       impl.mEventData->mLeftSelectionPosition  = start;
 761       impl.mEventData->mRightSelectionPosition = end;
 762
 763       if(impl.mSelectableControlInterface != nullptr)
 764       {
 765         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, start, end);
 766       }
 767     }
 768   }
 769 }
 770
 771 void ControllerImplEventHandler::OnHandlePressed(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 772 {
 773   ModelPtr&      model          = impl.mModel;
 774   const Vector2& scrollPosition = model->mScrollPosition;
 775
 776   // Convert from decorator's coords to text's coords.
 777   const float xPosition = event.p2.mFloat - scrollPosition.x;
 778   const float yPosition = event.p3.mFloat - scrollPosition.y;
 779
 780   // Need to calculate the handle's new position.
 781   bool                 matchedCharacter  = false;
 782   const CharacterIndex handleNewPosition = Text::GetClosestCursorIndex(model->mVisualModel,
 783                                                                        model->mLogicalModel,
 784                                                                        impl.mMetrics,
 785                                                                        xPosition,
 786                                                                        yPosition,
 787                                                                        CharacterHitTest::SCROLL,
 788                                                                        matchedCharacter);
 789
 790   EventData& eventData = *impl.mEventData;
 791   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 792   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 793
 794   if(Event::GRAB_HANDLE_EVENT == event.type)
 795   {
 796     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
 797
 798     if(handleNewPosition != eventData.mPrimaryCursorPosition)
 799     {
 800       // Updates the cursor position if the handle's new position is different than the current one.
 801       eventData.mUpdateCursorPosition = true;
 802       // Does not update the grab handle position if the smooth panning is enabled. (The decorator does it smooth).
 803       eventData.mUpdateGrabHandlePosition = !isSmoothHandlePanEnabled;
 804       eventData.mPrimaryCursorPosition    = handleNewPosition;
 805     }
 806
 807     // 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.
 808     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 809   }
 810   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 811   {
 812     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 813
 814     if((handleNewPosition != eventData.mLeftSelectionPosition) &&
 815        (handleNewPosition != eventData.mRightSelectionPosition))
 816     {
 817       // Updates the highlight box if the handle's new position is different than the current one.
 818       eventData.mUpdateHighlightBox = true;
 819       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 820       eventData.mUpdateLeftSelectionPosition = !isSmoothHandlePanEnabled;
 821       eventData.mLeftSelectionPosition       = handleNewPosition;
 822     }
 823
 824     // 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.
 825     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 826
 827     // Will define the order to scroll the text to match the handle position.
 828     eventData.mIsLeftHandleSelected  = true;
 829     eventData.mIsRightHandleSelected = false;
 830   }
 831   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 832   {
 833     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 834
 835     if((handleNewPosition != eventData.mRightSelectionPosition) &&
 836        (handleNewPosition != eventData.mLeftSelectionPosition))
 837     {
 838       // Updates the highlight box if the handle's new position is different than the current one.
 839       eventData.mUpdateHighlightBox = true;
 840       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 841       eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
 842       eventData.mRightSelectionPosition       = handleNewPosition;
 843     }
 844
 845     // 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.
 846     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 847
 848     // Will define the order to scroll the text to match the handle position.
 849     eventData.mIsLeftHandleSelected  = false;
 850     eventData.mIsRightHandleSelected = true;
 851   }
 852
 853   if((impl.mSelectableControlInterface != nullptr) || eventData.mUpdateRightSelectionPosition || eventData.mUpdateLeftSelectionPosition)
 854   {
 855     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 856   }
 857 }
 858
 859 void ControllerImplEventHandler::OnHandleReleased(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled, const bool handleStopScrolling)
 860 {
 861   CharacterIndex handlePosition = 0u;
 862   if(handleStopScrolling || isSmoothHandlePanEnabled)
 863   {
 864     ModelPtr&      model          = impl.mModel;
 865     const Vector2& scrollPosition = model->mScrollPosition;
 866
 867     // Convert from decorator's coords to text's coords.
 868     const float xPosition = event.p2.mFloat - scrollPosition.x;
 869     const float yPosition = event.p3.mFloat - scrollPosition.y;
 870
 871     bool matchedCharacter = false;
 872     handlePosition        = Text::GetClosestCursorIndex(model->mVisualModel,
 873                                                  model->mLogicalModel,
 874                                                  impl.mMetrics,
 875                                                  xPosition,
 876                                                  yPosition,
 877                                                  CharacterHitTest::SCROLL,
 878                                                  matchedCharacter);
 879   }
 880
 881   EventData& eventData = *impl.mEventData;
 882   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 883   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 884
 885   if(Event::GRAB_HANDLE_EVENT == event.type)
 886   {
 887     eventData.mUpdateCursorPosition     = true;
 888     eventData.mUpdateGrabHandlePosition = true;
 889     eventData.mUpdateInputStyle         = true;
 890
 891     if(!impl.IsClipboardEmpty())
 892     {
 893       impl.ChangeState(EventData::EDITING_WITH_PASTE_POPUP); // Moving grabhandle will show Paste Popup
 894     }
 895
 896     if(handleStopScrolling || isSmoothHandlePanEnabled)
 897     {
 898       eventData.mScrollAfterUpdatePosition = true;
 899       eventData.mPrimaryCursorPosition     = handlePosition;
 900     }
 901   }
 902   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 903   {
 904     impl.ChangeState(EventData::SELECTING);
 905
 906     eventData.mUpdateHighlightBox           = true;
 907     eventData.mUpdateLeftSelectionPosition  = true;
 908     eventData.mUpdateRightSelectionPosition = true;
 909
 910     if(handleStopScrolling || isSmoothHandlePanEnabled)
 911     {
 912       eventData.mScrollAfterUpdatePosition = true;
 913
 914       if((handlePosition != eventData.mRightSelectionPosition) &&
 915          (handlePosition != eventData.mLeftSelectionPosition))
 916       {
 917         eventData.mLeftSelectionPosition = handlePosition;
 918       }
 919     }
 920   }
 921   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 922   {
 923     impl.ChangeState(EventData::SELECTING);
 924
 925     eventData.mUpdateHighlightBox           = true;
 926     eventData.mUpdateRightSelectionPosition = true;
 927     eventData.mUpdateLeftSelectionPosition  = true;
 928
 929     if(handleStopScrolling || isSmoothHandlePanEnabled)
 930     {
 931       eventData.mScrollAfterUpdatePosition = true;
 932       if((handlePosition != eventData.mRightSelectionPosition) &&
 933          (handlePosition != eventData.mLeftSelectionPosition))
 934       {
 935         eventData.mRightSelectionPosition = handlePosition;
 936       }
 937     }
 938   }
 939
 940   if((impl.mSelectableControlInterface != nullptr) || eventData.mUpdateRightSelectionPosition || eventData.mUpdateLeftSelectionPosition)
 941   {
 942     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 943   }
 944
 945   eventData.mDecoratorUpdated = true;
 946 }
 947
 948 void ControllerImplEventHandler::OnHandleScrolling(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 949 {
 950   ModelPtr&       model          = impl.mModel;
 951   Vector2&        scrollPosition = model->mScrollPosition;
 952   VisualModelPtr& visualModel    = model->mVisualModel;
 953
 954   const float    xSpeed                = event.p2.mFloat;
 955   const float    ySpeed                = event.p3.mFloat;
 956   const Vector2& layoutSize            = visualModel->GetLayoutSize();
 957   const Vector2  currentScrollPosition = scrollPosition;
 958
 959   scrollPosition.x += xSpeed;
 960   scrollPosition.y += ySpeed;
 961
 962   impl.ClampHorizontalScroll(layoutSize);
 963   impl.ClampVerticalScroll(layoutSize);
 964
 965   EventData&    eventData = *impl.mEventData;
 966   DecoratorPtr& decorator = eventData.mDecorator;
 967
 968   bool endOfScroll = false;
 969   if(Vector2::ZERO == (currentScrollPosition - scrollPosition))
 970   {
 971     // Notify the decorator there is no more text to scroll.
 972     // The decorator won't send more scroll events.
 973     decorator->NotifyEndOfScroll();
 974     // Still need to set the position of the handle.
 975     endOfScroll = true;
 976   }
 977
 978   // Set the position of the handle.
 979   const bool scrollRightDirection      = xSpeed > 0.f;
 980   const bool scrollBottomDirection     = ySpeed > 0.f;
 981   const bool leftSelectionHandleEvent  = Event::LEFT_SELECTION_HANDLE_EVENT == event.type;
 982   const bool rightSelectionHandleEvent = Event::RIGHT_SELECTION_HANDLE_EVENT == event.type;
 983
 984   if(Event::GRAB_HANDLE_EVENT == event.type)
 985   {
 986     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
 987
 988     // Get the grab handle position in decorator coords.
 989     Vector2 position = decorator->GetPosition(GRAB_HANDLE);
 990
 991     if(decorator->IsHorizontalScrollEnabled())
 992     {
 993       // Position the grag handle close to either the left or right edge.
 994       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
 995     }
 996
 997     if(decorator->IsVerticalScrollEnabled())
 998     {
 999       position.x = eventData.mCursorHookPositionX;
1000
1001       // Position the grag handle close to either the top or bottom edge.
1002       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1003     }
1004
1005     // Get the new handle position.
1006     // The grab handle's position is in decorator's coords. Need to transforms to text's coords.
1007     bool                 matchedCharacter = false;
1008     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1009                                                                       impl.mModel->mLogicalModel,
1010                                                                       impl.mMetrics,
1011                                                                       position.x - scrollPosition.x,
1012                                                                       position.y - scrollPosition.y,
1013                                                                       CharacterHitTest::SCROLL,
1014                                                                       matchedCharacter);
1015
1016     if(eventData.mPrimaryCursorPosition != handlePosition)
1017     {
1018       eventData.mUpdateCursorPosition      = true;
1019       eventData.mUpdateGrabHandlePosition  = !isSmoothHandlePanEnabled;
1020       eventData.mScrollAfterUpdatePosition = true;
1021       eventData.mPrimaryCursorPosition     = handlePosition;
1022     }
1023     eventData.mUpdateInputStyle = eventData.mUpdateCursorPosition;
1024
1025     // Updates the decorator if the soft handle panning is enabled.
1026     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
1027   }
1028   else if(leftSelectionHandleEvent || rightSelectionHandleEvent)
1029   {
1030     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
1031
1032     // Get the selection handle position in decorator coords.
1033     Vector2 position = decorator->GetPosition(leftSelectionHandleEvent ? Text::LEFT_SELECTION_HANDLE : Text::RIGHT_SELECTION_HANDLE);
1034
1035     if(decorator->IsHorizontalScrollEnabled())
1036     {
1037       // Position the selection handle close to either the left or right edge.
1038       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
1039     }
1040
1041     if(decorator->IsVerticalScrollEnabled())
1042     {
1043       position.x = eventData.mCursorHookPositionX;
1044
1045       // Position the grag handle close to either the top or bottom edge.
1046       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1047     }
1048
1049     // Get the new handle position.
1050     // The selection handle's position is in decorator's coords. Need to transform to text's coords.
1051     bool                 matchedCharacter = false;
1052     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1053                                                                       impl.mModel->mLogicalModel,
1054                                                                       impl.mMetrics,
1055                                                                       position.x - scrollPosition.x,
1056                                                                       position.y - scrollPosition.y,
1057                                                                       CharacterHitTest::SCROLL,
1058                                                                       matchedCharacter);
1059     uint32_t             oldStart         = eventData.mLeftSelectionPosition;
1060     uint32_t             oldEnd           = eventData.mRightSelectionPosition;
1061
1062     if(leftSelectionHandleEvent)
1063     {
1064       const bool differentHandles = (eventData.mLeftSelectionPosition != handlePosition) && (eventData.mRightSelectionPosition != handlePosition);
1065
1066       if(differentHandles || endOfScroll)
1067       {
1068         eventData.mUpdateHighlightBox           = true;
1069         eventData.mUpdateLeftSelectionPosition  = !isSmoothHandlePanEnabled;
1070         eventData.mUpdateRightSelectionPosition = isSmoothHandlePanEnabled;
1071         eventData.mLeftSelectionPosition        = handlePosition;
1072       }
1073     }
1074     else
1075     {
1076       const bool differentHandles = (eventData.mRightSelectionPosition != handlePosition) && (eventData.mLeftSelectionPosition != handlePosition);
1077       if(differentHandles || endOfScroll)
1078       {
1079         eventData.mUpdateHighlightBox           = true;
1080         eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
1081         eventData.mUpdateLeftSelectionPosition  = isSmoothHandlePanEnabled;
1082         eventData.mRightSelectionPosition       = handlePosition;
1083       }
1084     }
1085
1086     if(eventData.mUpdateLeftSelectionPosition || eventData.mUpdateRightSelectionPosition)
1087     {
1088       impl.RepositionSelectionHandles();
1089
1090       eventData.mScrollAfterUpdatePosition = !isSmoothHandlePanEnabled;
1091
1092       if(impl.mSelectableControlInterface != nullptr)
1093       {
1094         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
1095       }
1096     }
1097   }
1098   eventData.mDecoratorUpdated = true;
1099 }
1100
1101 } // namespace Text
1102
1103 } // namespace Toolkit
1104
1105 } // namespace Dali