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         eventData.mPrimaryCursorPosition = eventData.mRightSelectionPosition;
 422
 423         if(impl.mSelectableControlInterface != nullptr)
 424         {
 425           impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 426         }
 427       }
 428
 429       if(impl.mSelectableControlInterface != nullptr && eventData.mLeftSelectionPosition == eventData.mRightSelectionPosition)
 430       {
 431         // If left selection position and right selection position are the same, the selection is canceled.
 432         selecting = false;
 433       }
 434       else
 435       {
 436         selecting = true;
 437       }
 438     }
 439     else if(eventData.mLeftSelectionPosition != eventData.mRightSelectionPosition)
 440     {
 441       // Show no grab handles and text highlight if Shift-Up/Down pressed but no selected text
 442       selecting = true;
 443     }
 444
 445     if(selecting)
 446     {
 447       // Notify the cursor position to the InputMethodContext.
 448       if(eventData.mInputMethodContext)
 449       {
 450         eventData.mInputMethodContext.SetCursorPosition(primaryCursorPosition);
 451         eventData.mInputMethodContext.NotifyCursorPosition();
 452       }
 453
 454       impl.ChangeState(EventData::SELECTING);
 455
 456       eventData.mUpdateLeftSelectionPosition  = true;
 457       eventData.mUpdateRightSelectionPosition = true;
 458       eventData.mUpdateGrabHandlePosition     = true;
 459       eventData.mUpdateHighlightBox           = true;
 460
 461       // Hide the text selection popup if select the text using keyboard instead of moving grab handles
 462       if(eventData.mGrabHandlePopupEnabled)
 463       {
 464         eventData.mDecorator->SetPopupActive(false);
 465       }
 466     }
 467     else
 468     {
 469       // If no selection, set a normal cursor.
 470       impl.ChangeState(EventData::EDITING);
 471       eventData.mUpdateCursorPosition = true;
 472     }
 473   }
 474   else
 475   {
 476     // Handle normal cursor move
 477     impl.ChangeState(EventData::EDITING);
 478     eventData.mUpdateCursorPosition = true;
 479   }
 480
 481   eventData.mUpdateInputStyle          = true;
 482   eventData.mScrollAfterUpdatePosition = true;
 483 }
 484
 485 void ControllerImplEventHandler::OnTapEvent(Controller::Impl& impl, const Event& event)
 486 {
 487   if(impl.mEventData)
 488   {
 489     const unsigned int tapCount     = event.p1.mUint;
 490     EventData&         eventData    = *impl.mEventData;
 491     ModelPtr&          model        = impl.mModel;
 492     LogicalModelPtr&   logicalModel = model->mLogicalModel;
 493     VisualModelPtr&    visualModel  = model->mVisualModel;
 494
 495     if(1u == tapCount)
 496     {
 497       if(impl.IsShowingRealText())
 498       {
 499         // Convert from control's coords to text's coords.
 500         const float xPosition   = event.p2.mFloat - model->mScrollPosition.x;
 501         const float yPosition   = event.p3.mFloat - model->mScrollPosition.y;
 502         uint32_t    oldSelStart = eventData.mLeftSelectionPosition;
 503         uint32_t    oldSelEnd   = eventData.mRightSelectionPosition;
 504
 505         // Keep the tap 'x' position. Used to move the cursor.
 506         eventData.mCursorHookPositionX = xPosition;
 507
 508         // Whether to touch point hits on a glyph.
 509         bool matchedCharacter            = false;
 510         eventData.mPrimaryCursorPosition = Text::GetClosestCursorIndex(visualModel,
 511                                                                        logicalModel,
 512                                                                        impl.mMetrics,
 513                                                                        xPosition,
 514                                                                        yPosition,
 515                                                                        CharacterHitTest::TAP,
 516                                                                        matchedCharacter);
 517
 518         if(impl.mSelectableControlInterface != nullptr && eventData.mDecorator->IsHighlightVisible())
 519         {
 520           impl.mSelectableControlInterface->SelectionChanged(oldSelStart, oldSelEnd, eventData.mPrimaryCursorPosition, eventData.mPrimaryCursorPosition);
 521         }
 522
 523         // When the cursor position is changing, delay cursor blinking
 524         eventData.mDecorator->DelayCursorBlink();
 525       }
 526       else
 527       {
 528         eventData.mPrimaryCursorPosition = 0u;
 529       }
 530
 531       // Update selection position after tapping
 532       eventData.mLeftSelectionPosition  = eventData.mPrimaryCursorPosition;
 533       eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 534
 535       eventData.mUpdateCursorPosition      = true;
 536       eventData.mUpdateGrabHandlePosition  = true;
 537       eventData.mScrollAfterUpdatePosition = true;
 538       eventData.mUpdateInputStyle          = true;
 539
 540       // Notify the cursor position to the InputMethodContext.
 541       if(eventData.mInputMethodContext)
 542       {
 543         eventData.mInputMethodContext.SetCursorPosition(eventData.mPrimaryCursorPosition);
 544         eventData.mInputMethodContext.NotifyCursorPosition();
 545       }
 546     }
 547     else if(2u == tapCount)
 548     {
 549       if(eventData.mSelectionEnabled)
 550       {
 551         // Convert from control's coords to text's coords.
 552         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 553         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 554
 555         // Calculates the logical position from the x,y coords.
 556         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mDoubleTapAction);
 557       }
 558     }
 559   }
 560 }
 561
 562 void ControllerImplEventHandler::OnPanEvent(Controller::Impl& impl, const Event& event)
 563 {
 564   if(impl.mEventData)
 565   {
 566     EventData&    eventData = *impl.mEventData;
 567     DecoratorPtr& decorator = eventData.mDecorator;
 568
 569     const bool isHorizontalScrollEnabled = decorator->IsHorizontalScrollEnabled();
 570     const bool isVerticalScrollEnabled   = decorator->IsVerticalScrollEnabled();
 571
 572     if(!isHorizontalScrollEnabled && !isVerticalScrollEnabled)
 573     {
 574       // Nothing to do if scrolling is not enabled.
 575       return;
 576     }
 577
 578     const GestureState state = static_cast<GestureState>(event.p1.mInt);
 579     switch(state)
 580     {
 581       case GestureState::STARTED:
 582       {
 583         // Will remove the cursor, handles or text's popup, ...
 584         impl.ChangeState(EventData::TEXT_PANNING);
 585         break;
 586       }
 587       case GestureState::CONTINUING:
 588       {
 589         ModelPtr& model = impl.mModel;
 590
 591         const Vector2& layoutSize     = model->mVisualModel->GetLayoutSize();
 592         Vector2&       scrollPosition = model->mScrollPosition;
 593         const Vector2  currentScroll  = scrollPosition;
 594
 595         if(isHorizontalScrollEnabled)
 596         {
 597           const float displacementX = event.p2.mFloat;
 598           scrollPosition.x += displacementX;
 599
 600           impl.ClampHorizontalScroll(layoutSize);
 601         }
 602
 603         if(isVerticalScrollEnabled)
 604         {
 605           const float displacementY = event.p3.mFloat;
 606           scrollPosition.y += displacementY;
 607
 608           impl.ClampVerticalScroll(layoutSize);
 609         }
 610
 611         decorator->UpdatePositions(scrollPosition - currentScroll);
 612         break;
 613       }
 614       case GestureState::FINISHED:
 615       case GestureState::CANCELLED: // FALLTHROUGH
 616       {
 617         // Will go back to the previous state to show the cursor, handles, the text's popup, ...
 618         impl.ChangeState(eventData.mPreviousState);
 619         break;
 620       }
 621       default:
 622         break;
 623     }
 624   }
 625 }
 626
 627 void ControllerImplEventHandler::OnLongPressEvent(Controller::Impl& impl, const Event& event)
 628 {
 629   DALI_LOG_INFO(gLogFilter, Debug::General, "Controller::OnLongPressEvent\n");
 630
 631   if(impl.mEventData)
 632   {
 633     EventData& eventData = *impl.mEventData;
 634
 635     if(!impl.IsShowingRealText() && (EventData::EDITING == eventData.mState))
 636     {
 637       impl.ChangeState(EventData::EDITING_WITH_POPUP);
 638       eventData.mDecoratorUpdated = true;
 639       eventData.mUpdateInputStyle = true;
 640     }
 641     else
 642     {
 643       if(eventData.mSelectionEnabled)
 644       {
 645         ModelPtr& model = impl.mModel;
 646
 647         // Convert from control's coords to text's coords.
 648         const float xPosition = event.p2.mFloat - model->mScrollPosition.x;
 649         const float yPosition = event.p3.mFloat - model->mScrollPosition.y;
 650
 651         // Calculates the logical position from the x,y coords.
 652         impl.RepositionSelectionHandles(xPosition, yPosition, eventData.mLongPressAction);
 653       }
 654     }
 655   }
 656 }
 657
 658 void ControllerImplEventHandler::OnHandleEvent(Controller::Impl& impl, const Event& event)
 659 {
 660   if(impl.mEventData)
 661   {
 662     const unsigned int state                    = event.p1.mUint;
 663     const bool         handleStopScrolling      = (HANDLE_STOP_SCROLLING == state);
 664     const bool         isSmoothHandlePanEnabled = impl.mEventData->mDecorator->IsSmoothHandlePanEnabled();
 665
 666     if(HANDLE_PRESSED == state)
 667     {
 668       OnHandlePressed(impl, event, isSmoothHandlePanEnabled);
 669     } // end ( HANDLE_PRESSED == state )
 670     else if((HANDLE_RELEASED == state) ||
 671             handleStopScrolling)
 672     {
 673       OnHandleReleased(impl, event, isSmoothHandlePanEnabled, handleStopScrolling);
 674     } // end ( ( HANDLE_RELEASED == state ) || ( HANDLE_STOP_SCROLLING == state ) )
 675     else if(HANDLE_SCROLLING == state)
 676     {
 677       OnHandleScrolling(impl, event, isSmoothHandlePanEnabled);
 678     } // end ( HANDLE_SCROLLING == state )
 679   }
 680 }
 681
 682 void ControllerImplEventHandler::OnSelectEvent(Controller::Impl& impl, const Event& event)
 683 {
 684   if(impl.mEventData && impl.mEventData->mSelectionEnabled)
 685   {
 686     ModelPtr&      model          = impl.mModel;
 687     const Vector2& scrollPosition = model->mScrollPosition;
 688
 689     // Convert from control's coords to text's coords.
 690     const float xPosition = event.p2.mFloat - scrollPosition.x;
 691     const float yPosition = event.p3.mFloat - scrollPosition.y;
 692
 693     // Calculates the logical position from the x,y coords.
 694     impl.RepositionSelectionHandles(xPosition, yPosition, Controller::NoTextTap::HIGHLIGHT);
 695   }
 696 }
 697
 698 void ControllerImplEventHandler::OnSelectAllEvent(Controller::Impl& impl)
 699 {
 700   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectAllEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 701
 702   if(impl.mEventData)
 703   {
 704     EventData& eventData = *impl.mEventData;
 705     if(eventData.mSelectionEnabled && eventData.mState != EventData::INACTIVE)
 706     {
 707       ModelPtr&      model          = impl.mModel;
 708       const Vector2& scrollPosition = model->mScrollPosition;
 709
 710       // Calculates the logical position from the start.
 711       impl.RepositionSelectionHandles(0.f - scrollPosition.x,
 712                                       0.f - scrollPosition.y,
 713                                       Controller::NoTextTap::HIGHLIGHT);
 714
 715       uint32_t oldStart = eventData.mLeftSelectionPosition;
 716       uint32_t oldEnd   = eventData.mRightSelectionPosition;
 717
 718       eventData.mLeftSelectionPosition  = 0u;
 719       eventData.mRightSelectionPosition = model->mLogicalModel->mText.Count();
 720       eventData.mPrimaryCursorPosition  = eventData.mRightSelectionPosition;
 721
 722       if(impl.mSelectableControlInterface != nullptr)
 723       {
 724         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 725       }
 726     }
 727   }
 728 }
 729
 730 void ControllerImplEventHandler::OnSelectNoneEvent(Controller::Impl& impl)
 731 {
 732   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "OnSelectNoneEvent mEventData->mSelectionEnabled%s \n", impl.mEventData->mSelectionEnabled ? "true" : "false");
 733
 734   if(impl.mEventData)
 735   {
 736     EventData& eventData = *impl.mEventData;
 737     if(eventData.mSelectionEnabled && eventData.mState == EventData::SELECTING)
 738     {
 739       uint32_t oldStart = eventData.mLeftSelectionPosition;
 740       uint32_t oldEnd   = eventData.mRightSelectionPosition;
 741
 742       eventData.mLeftSelectionPosition = eventData.mRightSelectionPosition = eventData.mPrimaryCursorPosition;
 743       impl.ChangeState(EventData::EDITING);
 744       eventData.mUpdateCursorPosition      = true;
 745       eventData.mUpdateInputStyle          = true;
 746       eventData.mScrollAfterUpdatePosition = true;
 747
 748       if(impl.mSelectableControlInterface != nullptr)
 749       {
 750         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 751       }
 752     }
 753   }
 754 }
 755
 756 void ControllerImplEventHandler::OnSelectRangeEvent(Controller::Impl& impl, const Event& event)
 757 {
 758   if(impl.mEventData && impl.mEventData->mSelectionEnabled && impl.mEventData->mState != EventData::INACTIVE)
 759   {
 760     ModelPtr&      model          = impl.mModel;
 761     const Vector2& scrollPosition = model->mScrollPosition;
 762
 763     // Calculate the selection index.
 764     const uint32_t length = static_cast<uint32_t>(model->mLogicalModel->mText.Count());
 765     const uint32_t start  = std::min(event.p2.mUint, length);
 766     const uint32_t end    = std::min(event.p3.mUint, length);
 767
 768     if(start != end)
 769     {
 770       uint32_t oldStart = impl.mEventData->mLeftSelectionPosition;
 771       uint32_t oldEnd   = impl.mEventData->mRightSelectionPosition;
 772
 773       // Calculates the logical position from the x,y coords.
 774       impl.RepositionSelectionHandles(0.f - scrollPosition.x, 0.f - scrollPosition.y, Controller::NoTextTap::HIGHLIGHT);
 775
 776       impl.mEventData->mLeftSelectionPosition  = start;
 777       impl.mEventData->mRightSelectionPosition = end;
 778       impl.mEventData->mPrimaryCursorPosition  = end;
 779
 780       if(impl.mSelectableControlInterface != nullptr)
 781       {
 782         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, start, end);
 783       }
 784     }
 785   }
 786 }
 787
 788 void ControllerImplEventHandler::OnHandlePressed(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 789 {
 790   ModelPtr&      model          = impl.mModel;
 791   const Vector2& scrollPosition = model->mScrollPosition;
 792
 793   // Convert from decorator's coords to text's coords.
 794   const float xPosition = event.p2.mFloat - scrollPosition.x;
 795   const float yPosition = event.p3.mFloat - scrollPosition.y;
 796
 797   // Need to calculate the handle's new position.
 798   bool                 matchedCharacter  = false;
 799   const CharacterIndex handleNewPosition = Text::GetClosestCursorIndex(model->mVisualModel,
 800                                                                        model->mLogicalModel,
 801                                                                        impl.mMetrics,
 802                                                                        xPosition,
 803                                                                        yPosition,
 804                                                                        CharacterHitTest::SCROLL,
 805                                                                        matchedCharacter);
 806
 807   EventData& eventData = *impl.mEventData;
 808   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 809   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 810
 811   if(Event::GRAB_HANDLE_EVENT == event.type)
 812   {
 813     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
 814
 815     if(handleNewPosition != eventData.mPrimaryCursorPosition)
 816     {
 817       // Updates the cursor position if the handle's new position is different than the current one.
 818       eventData.mUpdateCursorPosition = true;
 819       // Does not update the grab handle position if the smooth panning is enabled. (The decorator does it smooth).
 820       eventData.mUpdateGrabHandlePosition = !isSmoothHandlePanEnabled;
 821       eventData.mPrimaryCursorPosition    = 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   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 828   {
 829     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 830
 831     if((handleNewPosition != eventData.mLeftSelectionPosition) &&
 832        (handleNewPosition != eventData.mRightSelectionPosition))
 833     {
 834       // Updates the highlight box if the handle's new position is different than the current one.
 835       eventData.mUpdateHighlightBox = true;
 836       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 837       eventData.mUpdateLeftSelectionPosition = !isSmoothHandlePanEnabled;
 838       eventData.mLeftSelectionPosition       = handleNewPosition;
 839     }
 840
 841     // 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.
 842     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 843
 844     // Will define the order to scroll the text to match the handle position.
 845     eventData.mIsLeftHandleSelected  = true;
 846     eventData.mIsRightHandleSelected = false;
 847   }
 848   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 849   {
 850     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
 851
 852     if((handleNewPosition != eventData.mRightSelectionPosition) &&
 853        (handleNewPosition != eventData.mLeftSelectionPosition))
 854     {
 855       // Updates the highlight box if the handle's new position is different than the current one.
 856       eventData.mUpdateHighlightBox = true;
 857       // Does not update the selection handle position if the smooth panning is enabled. (The decorator does it smooth).
 858       eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
 859       eventData.mRightSelectionPosition       = handleNewPosition;
 860     }
 861
 862     // 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.
 863     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
 864
 865     // Will define the order to scroll the text to match the handle position.
 866     eventData.mIsLeftHandleSelected  = false;
 867     eventData.mIsRightHandleSelected = true;
 868   }
 869
 870   if((impl.mSelectableControlInterface != nullptr) && ((oldStart != eventData.mLeftSelectionPosition) || (oldEnd != eventData.mRightSelectionPosition)))
 871   {
 872     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 873   }
 874 }
 875
 876 void ControllerImplEventHandler::OnHandleReleased(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled, const bool handleStopScrolling)
 877 {
 878   CharacterIndex handlePosition = 0u;
 879   if(handleStopScrolling || isSmoothHandlePanEnabled)
 880   {
 881     ModelPtr&      model          = impl.mModel;
 882     const Vector2& scrollPosition = model->mScrollPosition;
 883
 884     // Convert from decorator's coords to text's coords.
 885     const float xPosition = event.p2.mFloat - scrollPosition.x;
 886     const float yPosition = event.p3.mFloat - scrollPosition.y;
 887
 888     bool matchedCharacter = false;
 889     handlePosition        = Text::GetClosestCursorIndex(model->mVisualModel,
 890                                                  model->mLogicalModel,
 891                                                  impl.mMetrics,
 892                                                  xPosition,
 893                                                  yPosition,
 894                                                  CharacterHitTest::SCROLL,
 895                                                  matchedCharacter);
 896   }
 897
 898   EventData& eventData = *impl.mEventData;
 899   uint32_t   oldStart  = eventData.mLeftSelectionPosition;
 900   uint32_t   oldEnd    = eventData.mRightSelectionPosition;
 901
 902   if(Event::GRAB_HANDLE_EVENT == event.type)
 903   {
 904     eventData.mUpdateCursorPosition     = true;
 905     eventData.mUpdateGrabHandlePosition = true;
 906     eventData.mUpdateInputStyle         = true;
 907
 908     if(!impl.IsClipboardEmpty())
 909     {
 910       impl.ChangeState(EventData::EDITING_WITH_PASTE_POPUP); // Moving grabhandle will show Paste Popup
 911     }
 912
 913     if(handleStopScrolling || isSmoothHandlePanEnabled)
 914     {
 915       eventData.mScrollAfterUpdatePosition = true;
 916       eventData.mPrimaryCursorPosition     = handlePosition;
 917     }
 918   }
 919   else if(Event::LEFT_SELECTION_HANDLE_EVENT == event.type)
 920   {
 921     impl.ChangeState(EventData::SELECTING);
 922
 923     eventData.mUpdateHighlightBox           = true;
 924     eventData.mUpdateLeftSelectionPosition  = true;
 925     eventData.mUpdateRightSelectionPosition = true;
 926
 927     if(handleStopScrolling || isSmoothHandlePanEnabled)
 928     {
 929       eventData.mScrollAfterUpdatePosition = true;
 930
 931       if((handlePosition != eventData.mRightSelectionPosition) &&
 932          (handlePosition != eventData.mLeftSelectionPosition))
 933       {
 934         eventData.mLeftSelectionPosition = handlePosition;
 935       }
 936     }
 937   }
 938   else if(Event::RIGHT_SELECTION_HANDLE_EVENT == event.type)
 939   {
 940     impl.ChangeState(EventData::SELECTING);
 941
 942     eventData.mUpdateHighlightBox           = true;
 943     eventData.mUpdateRightSelectionPosition = true;
 944     eventData.mUpdateLeftSelectionPosition  = true;
 945
 946     if(handleStopScrolling || isSmoothHandlePanEnabled)
 947     {
 948       eventData.mScrollAfterUpdatePosition = true;
 949       if((handlePosition != eventData.mRightSelectionPosition) &&
 950          (handlePosition != eventData.mLeftSelectionPosition))
 951       {
 952         eventData.mRightSelectionPosition = handlePosition;
 953       }
 954     }
 955   }
 956
 957   if((impl.mSelectableControlInterface != nullptr) && ((oldStart != eventData.mLeftSelectionPosition) || (oldEnd != eventData.mRightSelectionPosition)))
 958   {
 959     impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
 960   }
 961
 962   eventData.mDecoratorUpdated = true;
 963 }
 964
 965 void ControllerImplEventHandler::OnHandleScrolling(Controller::Impl& impl, const Event& event, const bool isSmoothHandlePanEnabled)
 966 {
 967   ModelPtr&       model          = impl.mModel;
 968   Vector2&        scrollPosition = model->mScrollPosition;
 969   VisualModelPtr& visualModel    = model->mVisualModel;
 970
 971   const float    xSpeed                = event.p2.mFloat;
 972   const float    ySpeed                = event.p3.mFloat;
 973   const Vector2& layoutSize            = visualModel->GetLayoutSize();
 974   const Vector2  currentScrollPosition = scrollPosition;
 975
 976   scrollPosition.x += xSpeed;
 977   scrollPosition.y += ySpeed;
 978
 979   impl.ClampHorizontalScroll(layoutSize);
 980   impl.ClampVerticalScroll(layoutSize);
 981
 982   EventData&    eventData = *impl.mEventData;
 983   DecoratorPtr& decorator = eventData.mDecorator;
 984
 985   bool endOfScroll = false;
 986   if(Vector2::ZERO == (currentScrollPosition - scrollPosition))
 987   {
 988     // Notify the decorator there is no more text to scroll.
 989     // The decorator won't send more scroll events.
 990     decorator->NotifyEndOfScroll();
 991     // Still need to set the position of the handle.
 992     endOfScroll = true;
 993   }
 994
 995   // Set the position of the handle.
 996   const bool scrollRightDirection      = xSpeed > 0.f;
 997   const bool scrollBottomDirection     = ySpeed > 0.f;
 998   const bool leftSelectionHandleEvent  = Event::LEFT_SELECTION_HANDLE_EVENT == event.type;
 999   const bool rightSelectionHandleEvent = Event::RIGHT_SELECTION_HANDLE_EVENT == event.type;
1000
1001   if(Event::GRAB_HANDLE_EVENT == event.type)
1002   {
1003     impl.ChangeState(EventData::GRAB_HANDLE_PANNING);
1004
1005     // Get the grab handle position in decorator coords.
1006     Vector2 position = decorator->GetPosition(GRAB_HANDLE);
1007
1008     if(decorator->IsHorizontalScrollEnabled())
1009     {
1010       // Position the grag handle close to either the left or right edge.
1011       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
1012     }
1013
1014     if(decorator->IsVerticalScrollEnabled())
1015     {
1016       position.x = eventData.mCursorHookPositionX;
1017
1018       // Position the grag handle close to either the top or bottom edge.
1019       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1020     }
1021
1022     // Get the new handle position.
1023     // The grab handle's position is in decorator's coords. Need to transforms to text's coords.
1024     bool                 matchedCharacter = false;
1025     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1026                                                                       impl.mModel->mLogicalModel,
1027                                                                       impl.mMetrics,
1028                                                                       position.x - scrollPosition.x,
1029                                                                       position.y - scrollPosition.y,
1030                                                                       CharacterHitTest::SCROLL,
1031                                                                       matchedCharacter);
1032
1033     if(eventData.mPrimaryCursorPosition != handlePosition)
1034     {
1035       eventData.mUpdateCursorPosition      = true;
1036       eventData.mUpdateGrabHandlePosition  = !isSmoothHandlePanEnabled;
1037       eventData.mScrollAfterUpdatePosition = true;
1038       eventData.mPrimaryCursorPosition     = handlePosition;
1039     }
1040     eventData.mUpdateInputStyle = eventData.mUpdateCursorPosition;
1041
1042     // Updates the decorator if the soft handle panning is enabled.
1043     eventData.mDecoratorUpdated = isSmoothHandlePanEnabled;
1044   }
1045   else if(leftSelectionHandleEvent || rightSelectionHandleEvent)
1046   {
1047     impl.ChangeState(EventData::SELECTION_HANDLE_PANNING);
1048
1049     // Get the selection handle position in decorator coords.
1050     Vector2 position = decorator->GetPosition(leftSelectionHandleEvent ? Text::LEFT_SELECTION_HANDLE : Text::RIGHT_SELECTION_HANDLE);
1051
1052     if(decorator->IsHorizontalScrollEnabled())
1053     {
1054       // Position the selection handle close to either the left or right edge.
1055       position.x = scrollRightDirection ? 0.f : visualModel->mControlSize.width;
1056     }
1057
1058     if(decorator->IsVerticalScrollEnabled())
1059     {
1060       position.x = eventData.mCursorHookPositionX;
1061
1062       // Position the grag handle close to either the top or bottom edge.
1063       position.y = scrollBottomDirection ? 0.f : visualModel->mControlSize.height;
1064     }
1065
1066     // Get the new handle position.
1067     // The selection handle's position is in decorator's coords. Need to transform to text's coords.
1068     bool                 matchedCharacter = false;
1069     const CharacterIndex handlePosition   = Text::GetClosestCursorIndex(visualModel,
1070                                                                       impl.mModel->mLogicalModel,
1071                                                                       impl.mMetrics,
1072                                                                       position.x - scrollPosition.x,
1073                                                                       position.y - scrollPosition.y,
1074                                                                       CharacterHitTest::SCROLL,
1075                                                                       matchedCharacter);
1076     uint32_t             oldStart         = eventData.mLeftSelectionPosition;
1077     uint32_t             oldEnd           = eventData.mRightSelectionPosition;
1078
1079     if(leftSelectionHandleEvent)
1080     {
1081       const bool differentHandles = (eventData.mLeftSelectionPosition != handlePosition) && (eventData.mRightSelectionPosition != handlePosition);
1082
1083       if(differentHandles || endOfScroll)
1084       {
1085         eventData.mUpdateHighlightBox           = true;
1086         eventData.mUpdateLeftSelectionPosition  = !isSmoothHandlePanEnabled;
1087         eventData.mUpdateRightSelectionPosition = isSmoothHandlePanEnabled;
1088         eventData.mLeftSelectionPosition        = handlePosition;
1089       }
1090     }
1091     else
1092     {
1093       const bool differentHandles = (eventData.mRightSelectionPosition != handlePosition) && (eventData.mLeftSelectionPosition != handlePosition);
1094       if(differentHandles || endOfScroll)
1095       {
1096         eventData.mUpdateHighlightBox           = true;
1097         eventData.mUpdateRightSelectionPosition = !isSmoothHandlePanEnabled;
1098         eventData.mUpdateLeftSelectionPosition  = isSmoothHandlePanEnabled;
1099         eventData.mRightSelectionPosition       = handlePosition;
1100       }
1101     }
1102
1103     if(eventData.mUpdateLeftSelectionPosition || eventData.mUpdateRightSelectionPosition)
1104     {
1105       impl.RepositionSelectionHandles();
1106
1107       eventData.mScrollAfterUpdatePosition = !isSmoothHandlePanEnabled;
1108
1109       if(impl.mSelectableControlInterface != nullptr)
1110       {
1111         impl.mSelectableControlInterface->SelectionChanged(oldStart, oldEnd, eventData.mLeftSelectionPosition, eventData.mRightSelectionPosition);
1112       }
1113     }
1114   }
1115   eventData.mDecoratorUpdated = true;
1116 }
1117
1118 } // namespace Text
1119
1120 } // namespace Toolkit
1121
1122 } // namespace Dali