/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=2 sw=2 et tw=78: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* * Implementation of nsFrameSelection */ #include "nsFrameSelection.h" #include "mozilla/Attributes.h" #include "mozilla/AutoRestore.h" #include "mozilla/EventStates.h" #include "nsCOMPtr.h" #include "nsString.h" #include "nsISelectionListener.h" #include "nsContentCID.h" #include "nsDeviceContext.h" #include "nsIContent.h" #include "nsIDOMNode.h" #include "nsRange.h" #include "nsITableCellLayout.h" #include "nsTArray.h" #include "nsTableWrapperFrame.h" #include "nsTableCellFrame.h" #include "nsIScrollableFrame.h" #include "nsCCUncollectableMarker.h" #include "nsIContentIterator.h" #include "nsIDocumentEncoder.h" #include "nsTextFragment.h" #include #include "nsContentUtils.h" #include "nsGkAtoms.h" #include "nsIFrameTraversal.h" #include "nsLayoutUtils.h" #include "nsLayoutCID.h" #include "nsBidiPresUtils.h" static NS_DEFINE_CID(kFrameTraversalCID, NS_FRAMETRAVERSAL_CID); #include "nsTextFrame.h" #include "nsIDOMText.h" #include "nsContentUtils.h" #include "nsThreadUtils.h" #include "mozilla/Preferences.h" #include "nsDOMClassInfoID.h" #include "nsPresContext.h" #include "nsIPresShell.h" #include "nsCaret.h" #include "AccessibleCaretEventHub.h" #include "mozilla/MouseEvents.h" #include "mozilla/TextEvents.h" #include "nsITimer.h" // notifications #include "nsIDOMDocument.h" #include "nsIDocument.h" #include "nsISelectionController.h"//for the enums #include "nsAutoCopyListener.h" #include "SelectionChangeListener.h" #include "nsCopySupport.h" #include "nsIClipboard.h" #include "nsIFrameInlines.h" #include "nsIBidiKeyboard.h" #include "nsError.h" #include "mozilla/dom/Element.h" #include "mozilla/dom/Selection.h" #include "mozilla/dom/ShadowRoot.h" #include "mozilla/ErrorResult.h" #include "mozilla/dom/SelectionBinding.h" #include "mozilla/AsyncEventDispatcher.h" #include "mozilla/Telemetry.h" #include "mozilla/layers/ScrollInputMethods.h" #include "nsIEditor.h" #include "nsIHTMLEditor.h" #include "nsFocusManager.h" #include "nsPIDOMWindow.h" using namespace mozilla; using namespace mozilla::dom; using mozilla::layers::ScrollInputMethod; //#define DEBUG_TABLE 1 static bool IsValidSelectionPoint(nsFrameSelection *aFrameSel, nsINode *aNode); static nsIAtom *GetTag(nsINode *aNode); // returns the parent static nsINode* ParentOffset(nsINode *aNode, int32_t *aChildOffset); static nsINode* GetCellParent(nsINode *aDomNode); #ifdef PRINT_RANGE static void printRange(nsRange *aDomRange); #define DEBUG_OUT_RANGE(x) printRange(x) #else #define DEBUG_OUT_RANGE(x) #endif // PRINT_RANGE /****************************************************************************** * nsPeekOffsetStruct ******************************************************************************/ //#define DEBUG_SELECTION // uncomment for printf describing every collapse and extend. //#define DEBUG_NAVIGATION //#define DEBUG_TABLE_SELECTION 1 nsPeekOffsetStruct::nsPeekOffsetStruct(nsSelectionAmount aAmount, nsDirection aDirection, int32_t aStartOffset, nsPoint aDesiredPos, bool aJumpLines, bool aScrollViewStop, bool aIsKeyboardSelect, bool aVisual, bool aExtend, EWordMovementType aWordMovementType) : mAmount(aAmount) , mDirection(aDirection) , mStartOffset(aStartOffset) , mDesiredPos(aDesiredPos) , mWordMovementType(aWordMovementType) , mJumpLines(aJumpLines) , mScrollViewStop(aScrollViewStop) , mIsKeyboardSelect(aIsKeyboardSelect) , mVisual(aVisual) , mExtend(aExtend) , mResultContent() , mResultFrame(nullptr) , mContentOffset(0) , mAttach(CARET_ASSOCIATE_BEFORE) { } static int8_t GetIndexFromSelectionType(SelectionType aSelectionType) { switch (aSelectionType) { case SelectionType::eNormal: return 0; case SelectionType::eSpellCheck: return 1; case SelectionType::eIMERawClause: return 2; case SelectionType::eIMESelectedRawClause: return 3; case SelectionType::eIMEConvertedClause: return 4; case SelectionType::eIMESelectedClause: return 5; case SelectionType::eAccessibility: return 6; case SelectionType::eFind: return 7; case SelectionType::eURLSecondary: return 8; case SelectionType::eURLStrikeout: return 9; default: return -1; } /* NOTREACHED */ } static SelectionType GetSelectionTypeFromIndex(int8_t aIndex) { static const SelectionType kSelectionTypes[] = { SelectionType::eNormal, SelectionType::eSpellCheck, SelectionType::eIMERawClause, SelectionType::eIMESelectedRawClause, SelectionType::eIMEConvertedClause, SelectionType::eIMESelectedClause, SelectionType::eAccessibility, SelectionType::eFind, SelectionType::eURLSecondary, SelectionType::eURLStrikeout }; if (NS_WARN_IF(aIndex < 0) || NS_WARN_IF(static_cast(aIndex) >= ArrayLength(kSelectionTypes))) { return SelectionType::eNormal; } return kSelectionTypes[aIndex]; } /* The limiter is used specifically for the text areas and textfields In that case it is the DIV tag that is anonymously created for the text areas/fields. Text nodes and BR nodes fall beneath it. In the case of a BR node the limiter will be the parent and the offset will point before or after the BR node. In the case of the text node the parent content is the text node itself and the offset will be the exact character position. The offset is not important to check for validity. Simply look at the passed in content. If it equals the limiter then the selection point is valid. If its parent it the limiter then the point is also valid. In the case of NO limiter all points are valid since you are in a topmost iframe. (browser or composer) */ bool IsValidSelectionPoint(nsFrameSelection *aFrameSel, nsINode *aNode) { if (!aFrameSel || !aNode) return false; nsIContent *limiter = aFrameSel->GetLimiter(); if (limiter && limiter != aNode && limiter != aNode->GetParent()) { //if newfocus == the limiter. that's ok. but if not there and not parent bad return false; //not in the right content. tLimiter said so } limiter = aFrameSel->GetAncestorLimiter(); return !limiter || nsContentUtils::ContentIsDescendantOf(aNode, limiter); } namespace mozilla { struct MOZ_RAII AutoPrepareFocusRange { AutoPrepareFocusRange(Selection* aSelection, bool aContinueSelection, bool aMultipleSelection MOZ_GUARD_OBJECT_NOTIFIER_PARAM) { MOZ_GUARD_OBJECT_NOTIFIER_INIT; if (aSelection->mRanges.Length() <= 1) { return; } if (aSelection->mFrameSelection->IsUserSelectionReason()) { mUserSelect.emplace(aSelection); } bool userSelection = aSelection->mUserInitiated; nsTArray& ranges = aSelection->mRanges; if (!userSelection || (!aContinueSelection && aMultipleSelection)) { // Scripted command or the user is starting a new explicit multi-range // selection. for (RangeData& entry : ranges) { entry.mRange->SetIsGenerated(false); } return; } int16_t reason = aSelection->mFrameSelection->mSelectionChangeReason; bool isAnchorRelativeOp = (reason & (nsISelectionListener::DRAG_REASON | nsISelectionListener::MOUSEDOWN_REASON | nsISelectionListener::MOUSEUP_REASON | nsISelectionListener::COLLAPSETOSTART_REASON)); if (!isAnchorRelativeOp) { return; } // This operation is against the anchor but our current mAnchorFocusRange // represents the focus in a multi-range selection. The anchor from a user // perspective is the most distant generated range on the opposite side. // Find that range and make it the mAnchorFocusRange. const size_t len = ranges.Length(); size_t newAnchorFocusIndex = size_t(-1); if (aSelection->GetDirection() == eDirNext) { for (size_t i = 0; i < len; ++i) { if (ranges[i].mRange->IsGenerated()) { newAnchorFocusIndex = i; break; } } } else { size_t i = len; while (i--) { if (ranges[i].mRange->IsGenerated()) { newAnchorFocusIndex = i; break; } } } if (newAnchorFocusIndex == size_t(-1)) { // There are no generated ranges - that's fine. return; } // Setup the new mAnchorFocusRange and mark the old one as generated. if (aSelection->mAnchorFocusRange) { aSelection->mAnchorFocusRange->SetIsGenerated(true); } nsRange* range = ranges[newAnchorFocusIndex].mRange; range->SetIsGenerated(false); aSelection->mAnchorFocusRange = range; // Remove all generated ranges (including the old mAnchorFocusRange). RefPtr presContext = aSelection->GetPresContext(); size_t i = len; while (i--) { range = aSelection->mRanges[i].mRange; if (range->IsGenerated()) { range->SetSelection(nullptr); aSelection->SelectFrames(presContext, range, false); aSelection->mRanges.RemoveElementAt(i); } } if (aSelection->mFrameSelection) { aSelection->mFrameSelection->InvalidateDesiredPos(); } } Maybe mUserSelect; MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER }; } // namespace mozilla ////////////BEGIN nsFrameSelection methods nsFrameSelection::nsFrameSelection() { for (size_t i = 0; i < kPresentSelectionTypeCount; i++){ mDomSelections[i] = new Selection(this); mDomSelections[i]->SetType(GetSelectionTypeFromIndex(i)); } mBatching = 0; mChangesDuringBatching = false; mNotifyFrames = true; mMouseDoubleDownState = false; mHint = CARET_ASSOCIATE_BEFORE; mCaretBidiLevel = BIDI_LEVEL_UNDEFINED; mKbdBidiLevel = NSBIDI_LTR; mDragSelectingCells = false; mSelectingTableCellMode = 0; mSelectedCellIndex = 0; nsAutoCopyListener *autoCopy = nullptr; // On macOS, cache the current selection to send to osx service menu. #ifdef XP_MACOSX autoCopy = nsAutoCopyListener::GetInstance(nsIClipboard::kSelectionCache); #endif // Check to see if the autocopy pref is enabled // and add the autocopy listener if it is if (Preferences::GetBool("clipboard.autocopy")) { autoCopy = nsAutoCopyListener::GetInstance(nsIClipboard::kSelectionClipboard); } if (autoCopy) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (mDomSelections[index]) { autoCopy->Listen(mDomSelections[index]); } } mDisplaySelection = nsISelectionController::SELECTION_OFF; mSelectionChangeReason = nsISelectionListener::NO_REASON; mDelayedMouseEventValid = false; // These values are not used since they are only valid when // mDelayedMouseEventValid is true, and setting mDelayedMouseEventValid //alwaysoverrides these values. mDelayedMouseEventIsShift = false; mDelayedMouseEventClickCount = 0; } nsFrameSelection::~nsFrameSelection() { } NS_IMPL_CYCLE_COLLECTION_CLASS(nsFrameSelection) NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsFrameSelection) for (size_t i = 0; i < kPresentSelectionTypeCount; ++i) { tmp->mDomSelections[i] = nullptr; } NS_IMPL_CYCLE_COLLECTION_UNLINK(mCellParent) tmp->mSelectingTableCellMode = 0; tmp->mDragSelectingCells = false; NS_IMPL_CYCLE_COLLECTION_UNLINK(mStartSelectedCell) NS_IMPL_CYCLE_COLLECTION_UNLINK(mEndSelectedCell) NS_IMPL_CYCLE_COLLECTION_UNLINK(mAppendStartSelectedCell) NS_IMPL_CYCLE_COLLECTION_UNLINK(mUnselectCellOnMouseUp) NS_IMPL_CYCLE_COLLECTION_UNLINK(mMaintainRange) NS_IMPL_CYCLE_COLLECTION_UNLINK(mLimiter) NS_IMPL_CYCLE_COLLECTION_UNLINK(mAncestorLimiter) NS_IMPL_CYCLE_COLLECTION_UNLINK_END NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsFrameSelection) if (tmp->mShell && tmp->mShell->GetDocument() && nsCCUncollectableMarker::InGeneration(cb, tmp->mShell->GetDocument()-> GetMarkedCCGeneration())) { return NS_SUCCESS_INTERRUPTED_TRAVERSE; } for (size_t i = 0; i < kPresentSelectionTypeCount; ++i) { NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDomSelections[i]) } NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCellParent) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStartSelectedCell) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEndSelectedCell) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAppendStartSelectedCell) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mUnselectCellOnMouseUp) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMaintainRange) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLimiter) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAncestorLimiter) NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(nsFrameSelection, AddRef) NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(nsFrameSelection, Release) // Get the x (or y, in vertical writing mode) position requested // by the Key Handling for line-up/down nsresult nsFrameSelection::FetchDesiredPos(nsPoint &aDesiredPos) { if (!mShell) { NS_ERROR("fetch desired position failed"); return NS_ERROR_FAILURE; } if (mDesiredPosSet) { aDesiredPos = mDesiredPos; return NS_OK; } RefPtr caret = mShell->GetCaret(); if (!caret) { return NS_ERROR_NULL_POINTER; } int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); caret->SetSelection(mDomSelections[index]); nsRect coord; nsIFrame* caretFrame = caret->GetGeometry(&coord); if (!caretFrame) { return NS_ERROR_FAILURE; } nsPoint viewOffset(0, 0); nsView* view = nullptr; caretFrame->GetOffsetFromView(viewOffset, &view); if (view) { coord += viewOffset; } aDesiredPos = coord.TopLeft(); return NS_OK; } void nsFrameSelection::InvalidateDesiredPos() // do not listen to mDesiredPos; // you must get another. { mDesiredPosSet = false; } void nsFrameSelection::SetDesiredPos(nsPoint aPos) { mDesiredPos = aPos; mDesiredPosSet = true; } nsresult nsFrameSelection::ConstrainFrameAndPointToAnchorSubtree(nsIFrame *aFrame, nsPoint& aPoint, nsIFrame **aRetFrame, nsPoint& aRetPoint) { // // The whole point of this method is to return a frame and point that // that lie within the same valid subtree as the anchor node's frame, // for use with the method GetContentAndOffsetsFromPoint(). // // A valid subtree is defined to be one where all the content nodes in // the tree have a valid parent-child relationship. // // If the anchor frame and aFrame are in the same subtree, aFrame will // be returned in aRetFrame. If they are in different subtrees, we // return the frame for the root of the subtree. // if (!aFrame || !aRetFrame) return NS_ERROR_NULL_POINTER; *aRetFrame = aFrame; aRetPoint = aPoint; // // Get the frame and content for the selection's anchor point! // nsresult result; nsCOMPtr anchorNode; int32_t anchorOffset = 0; int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; result = mDomSelections[index]->GetAnchorNode(getter_AddRefs(anchorNode)); if (NS_FAILED(result)) return result; if (!anchorNode) return NS_OK; result = mDomSelections[index]->GetAnchorOffset(&anchorOffset); if (NS_FAILED(result)) return result; nsCOMPtr anchorContent = do_QueryInterface(anchorNode); if (!anchorContent) return NS_ERROR_FAILURE; // // Now find the root of the subtree containing the anchor's content. // NS_ENSURE_STATE(mShell); nsIContent* anchorRoot = anchorContent->GetSelectionRootContent(mShell); NS_ENSURE_TRUE(anchorRoot, NS_ERROR_UNEXPECTED); // // Now find the root of the subtree containing aFrame's content. // nsIContent* content = aFrame->GetContent(); if (content) { nsIContent* contentRoot = content->GetSelectionRootContent(mShell); NS_ENSURE_TRUE(contentRoot, NS_ERROR_UNEXPECTED); if (anchorRoot == contentRoot) { // If the aFrame's content isn't the capturing content, it should be // a descendant. At this time, we can return simply. nsIContent* capturedContent = nsIPresShell::GetCapturingContent(); if (capturedContent != content) { return NS_OK; } // Find the frame under the mouse cursor with the root frame. // At this time, don't use the anchor's frame because it may not have // fixed positioned frames. nsIFrame* rootFrame = mShell->FrameManager()->GetRootFrame(); nsPoint ptInRoot = aPoint + aFrame->GetOffsetTo(rootFrame); nsIFrame* cursorFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, ptInRoot); // If the mouse cursor in on a frame which is descendant of same // selection root, we can expand the selection to the frame. if (cursorFrame && cursorFrame->PresContext()->PresShell() == mShell) { nsIContent* cursorContent = cursorFrame->GetContent(); NS_ENSURE_TRUE(cursorContent, NS_ERROR_FAILURE); nsIContent* cursorContentRoot = cursorContent->GetSelectionRootContent(mShell); NS_ENSURE_TRUE(cursorContentRoot, NS_ERROR_UNEXPECTED); if (cursorContentRoot == anchorRoot) { *aRetFrame = cursorFrame; aRetPoint = aPoint + aFrame->GetOffsetTo(cursorFrame); return NS_OK; } } // Otherwise, e.g., the cursor isn't on any frames (e.g., the mouse // cursor is out of the window), we should use the frame of the anchor // root. } } // // When we can't find a frame which is under the mouse cursor and has a same // selection root as the anchor node's, we should return the selection root // frame. // *aRetFrame = anchorRoot->GetPrimaryFrame(); if (!*aRetFrame) return NS_ERROR_FAILURE; // // Now make sure that aRetPoint is converted to the same coordinate // system used by aRetFrame. // aRetPoint = aPoint + aFrame->GetOffsetTo(*aRetFrame); return NS_OK; } void nsFrameSelection::SetCaretBidiLevel(nsBidiLevel aLevel) { // If the current level is undefined, we have just inserted new text. // In this case, we don't want to reset the keyboard language mCaretBidiLevel = aLevel; RefPtr caret; if (mShell && (caret = mShell->GetCaret())) { caret->SchedulePaint(); } } nsBidiLevel nsFrameSelection::GetCaretBidiLevel() const { return mCaretBidiLevel; } void nsFrameSelection::UndefineCaretBidiLevel() { mCaretBidiLevel |= BIDI_LEVEL_UNDEFINED; } #ifdef PRINT_RANGE void printRange(nsRange *aDomRange) { if (!aDomRange) { printf("NULL nsIDOMRange\n"); } nsINode* startNode = aDomRange->GetStartContainer(); nsINode* endNode = aDomRange->GetEndContainer(); int32_t startOffset = aDomRange->StartOffset(); int32_t endOffset = aDomRange->EndOffset(); printf("range: 0x%lx\t start: 0x%lx %ld, \t end: 0x%lx,%ld\n", (unsigned long)aDomRange, (unsigned long)startNode, (long)startOffset, (unsigned long)endNode, (long)endOffset); } #endif /* PRINT_RANGE */ static nsIAtom *GetTag(nsINode *aNode) { nsCOMPtr content = do_QueryInterface(aNode); if (!content) { NS_NOTREACHED("bad node passed to GetTag()"); return nullptr; } return content->NodeInfo()->NameAtom(); } // Returns the parent nsINode* ParentOffset(nsINode *aNode, int32_t *aChildOffset) { if (!aNode || !aChildOffset) return nullptr; nsIContent* parent = aNode->GetParent(); if (parent) { *aChildOffset = parent->IndexOf(aNode); return parent; } return nullptr; } static nsINode* GetCellParent(nsINode *aDomNode) { if (!aDomNode) return nullptr; nsINode* current = aDomNode; // Start with current node and look for a table cell while (current) { nsIAtom* tag = GetTag(current); if (tag == nsGkAtoms::td || tag == nsGkAtoms::th) return current; current = current->GetParent(); } return nullptr; } void nsFrameSelection::Init(nsIPresShell *aShell, nsIContent *aLimiter) { mShell = aShell; mDragState = false; mDesiredPosSet = false; mLimiter = aLimiter; mCaretMovementStyle = Preferences::GetInt("bidi.edit.caret_movement_style", 2); // This should only ever be initialized on the main thread, so we are OK here. static bool prefCachesInitialized = false; if (!prefCachesInitialized) { prefCachesInitialized = true; Preferences::AddBoolVarCache(&sSelectionEventsEnabled, "dom.select_events.enabled", false); Preferences::AddBoolVarCache(&sSelectionEventsOnTextControlsEnabled, "dom.select_events.textcontrols.enabled", false); } RefPtr eventHub = mShell->GetAccessibleCaretEventHub(); if (eventHub) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (mDomSelections[index]) { mDomSelections[index]->AddSelectionListener(eventHub); } } nsIDocument* doc = aShell->GetDocument(); if (sSelectionEventsEnabled || (doc && nsContentUtils::IsSystemPrincipal(doc->NodePrincipal()))) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (mDomSelections[index]) { // The Selection instance will hold a strong reference to its selectionchangelistener // so we don't have to worry about that! RefPtr listener = new SelectionChangeListener; mDomSelections[index]->AddSelectionListener(listener); } } } bool nsFrameSelection::sSelectionEventsEnabled = false; bool nsFrameSelection::sSelectionEventsOnTextControlsEnabled = false; nsresult nsFrameSelection::MoveCaret(nsDirection aDirection, bool aContinueSelection, nsSelectionAmount aAmount, CaretMovementStyle aMovementStyle) { bool visualMovement = aMovementStyle == eVisual || (aMovementStyle == eUsePrefStyle && (mCaretMovementStyle == 1 || (mCaretMovementStyle == 2 && !aContinueSelection))); NS_ENSURE_STATE(mShell); // Flush out layout, since we need it to be up to date to do caret // positioning. mShell->FlushPendingNotifications(FlushType::Layout); if (!mShell) { return NS_OK; } nsPresContext *context = mShell->GetPresContext(); if (!context) return NS_ERROR_FAILURE; bool isCollapsed; nsPoint desiredPos(0, 0); //we must keep this around and revalidate it when its just UP/DOWN int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); RefPtr sel = mDomSelections[index]; if (!sel) return NS_ERROR_NULL_POINTER; int32_t scrollFlags = Selection::SCROLL_FOR_CARET_MOVE; nsINode* focusNode = sel->GetFocusNode(); if (focusNode && (focusNode->IsEditable() || (focusNode->IsElement() && focusNode->AsElement()->State(). HasState(NS_EVENT_STATE_MOZ_READWRITE)))) { // If caret moves in editor, it should cause scrolling even if it's in // overflow: hidden;. scrollFlags |= Selection::SCROLL_OVERFLOW_HIDDEN; } nsresult result = sel->GetIsCollapsed(&isCollapsed); if (NS_FAILED(result)) { return result; } int32_t caretStyle = Preferences::GetInt("layout.selection.caret_style", 0); if (caretStyle == 0 #ifdef XP_WIN && aAmount != eSelectLine #endif ) { // Put caret at the selection edge in the |aDirection| direction. caretStyle = 2; } bool doCollapse = !isCollapsed && !aContinueSelection && caretStyle == 2 && aAmount <= eSelectLine; if (doCollapse) { if (aDirection == eDirPrevious) { PostReason(nsISelectionListener::COLLAPSETOSTART_REASON); mHint = CARET_ASSOCIATE_AFTER; } else { PostReason(nsISelectionListener::COLLAPSETOEND_REASON); mHint = CARET_ASSOCIATE_BEFORE; } } else { PostReason(nsISelectionListener::KEYPRESS_REASON); } AutoPrepareFocusRange prep(sel, aContinueSelection, false); if (aAmount == eSelectLine) { result = FetchDesiredPos(desiredPos); if (NS_FAILED(result)) { return result; } SetDesiredPos(desiredPos); } if (doCollapse) { const nsRange* anchorFocusRange = sel->GetAnchorFocusRange(); if (anchorFocusRange) { nsINode* node; int32_t offset; if (aDirection == eDirPrevious) { node = anchorFocusRange->GetStartContainer(); offset = anchorFocusRange->StartOffset(); } else { node = anchorFocusRange->GetEndContainer(); offset = anchorFocusRange->EndOffset(); } sel->Collapse(node, offset); } sel->ScrollIntoView(nsISelectionController::SELECTION_FOCUS_REGION, nsIPresShell::ScrollAxis(), nsIPresShell::ScrollAxis(), scrollFlags); return NS_OK; } nsIFrame *frame; int32_t offsetused = 0; result = sel->GetPrimaryFrameForFocusNode(&frame, &offsetused, visualMovement); if (NS_FAILED(result) || !frame) return NS_FAILED(result) ? result : NS_ERROR_FAILURE; //set data using mLimiter to stop on scroll views. If we have a limiter then we stop peeking //when we hit scrollable views. If no limiter then just let it go ahead nsPeekOffsetStruct pos(aAmount, eDirPrevious, offsetused, desiredPos, true, mLimiter != nullptr, true, visualMovement, aContinueSelection); nsBidiDirection paraDir = nsBidiPresUtils::ParagraphDirection(frame); CaretAssociateHint tHint(mHint); //temporary variable so we dont set mHint until it is necessary switch (aAmount){ case eSelectCharacter: case eSelectCluster: case eSelectWord: case eSelectWordNoSpace: InvalidateDesiredPos(); pos.mAmount = aAmount; pos.mDirection = (visualMovement && paraDir == NSBIDI_RTL) ? nsDirection(1 - aDirection) : aDirection; break; case eSelectLine: pos.mAmount = aAmount; pos.mDirection = aDirection; break; case eSelectBeginLine: case eSelectEndLine: InvalidateDesiredPos(); pos.mAmount = aAmount; pos.mDirection = (visualMovement && paraDir == NSBIDI_RTL) ? nsDirection(1 - aDirection) : aDirection; break; default: return NS_ERROR_FAILURE; } if (NS_SUCCEEDED(result = frame->PeekOffset(&pos)) && pos.mResultContent) { nsIFrame *theFrame; int32_t currentOffset, frameStart, frameEnd; if (aAmount <= eSelectWordNoSpace) { // For left/right, PeekOffset() sets pos.mResultFrame correctly, but does not set pos.mAttachForward, // so determine the hint here based on the result frame and offset: // If we're at the end of a text frame, set the hint to ASSOCIATE_BEFORE to indicate that we // want the caret displayed at the end of this frame, not at the beginning of the next one. theFrame = pos.mResultFrame; theFrame->GetOffsets(frameStart, frameEnd); currentOffset = pos.mContentOffset; if (frameEnd == currentOffset && !(frameStart == 0 && frameEnd == 0)) tHint = CARET_ASSOCIATE_BEFORE; else tHint = CARET_ASSOCIATE_AFTER; } else { // For up/down and home/end, pos.mResultFrame might not be set correctly, or not at all. // In these cases, get the frame based on the content and hint returned by PeekOffset(). tHint = pos.mAttach; theFrame = GetFrameForNodeOffset(pos.mResultContent, pos.mContentOffset, tHint, ¤tOffset); if (!theFrame) return NS_ERROR_FAILURE; theFrame->GetOffsets(frameStart, frameEnd); } if (context->BidiEnabled()) { switch (aAmount) { case eSelectBeginLine: case eSelectEndLine: { // In Bidi contexts, PeekOffset calculates pos.mContentOffset // differently depending on whether the movement is visual or logical. // For visual movement, pos.mContentOffset depends on the direction- // ality of the first/last frame on the line (theFrame), and the caret // directionality must correspond. FrameBidiData bidiData = theFrame->GetBidiData(); SetCaretBidiLevel(visualMovement ? bidiData.embeddingLevel : bidiData.baseLevel); break; } default: // If the current position is not a frame boundary, it's enough just // to take the Bidi level of the current frame if ((pos.mContentOffset != frameStart && pos.mContentOffset != frameEnd) || eSelectLine == aAmount) { SetCaretBidiLevel(theFrame->GetEmbeddingLevel()); } else { BidiLevelFromMove(mShell, pos.mResultContent, pos.mContentOffset, aAmount, tHint); } } } result = TakeFocus(pos.mResultContent, pos.mContentOffset, pos.mContentOffset, tHint, aContinueSelection, false); } else if (aAmount <= eSelectWordNoSpace && aDirection == eDirNext && !aContinueSelection) { // Collapse selection if PeekOffset failed, we either // 1. bumped into the BRFrame, bug 207623 // 2. had select-all in a text input (DIV range), bug 352759. bool isBRFrame = frame->IsBrFrame(); sel->Collapse(sel->GetFocusNode(), sel->FocusOffset()); // Note: 'frame' might be dead here. if (!isBRFrame) { mHint = CARET_ASSOCIATE_BEFORE; // We're now at the end of the frame to the left. } result = NS_OK; } if (NS_SUCCEEDED(result)) { result = mDomSelections[index]-> ScrollIntoView(nsISelectionController::SELECTION_FOCUS_REGION, nsIPresShell::ScrollAxis(), nsIPresShell::ScrollAxis(), scrollFlags); } return result; } nsPrevNextBidiLevels nsFrameSelection::GetPrevNextBidiLevels(nsIContent *aNode, uint32_t aContentOffset, bool aJumpLines) const { return GetPrevNextBidiLevels(aNode, aContentOffset, mHint, aJumpLines); } nsPrevNextBidiLevels nsFrameSelection::GetPrevNextBidiLevels(nsIContent* aNode, uint32_t aContentOffset, CaretAssociateHint aHint, bool aJumpLines) const { // Get the level of the frames on each side nsIFrame *currentFrame; int32_t currentOffset; int32_t frameStart, frameEnd; nsDirection direction; nsPrevNextBidiLevels levels; levels.SetData(nullptr, nullptr, 0, 0); currentFrame = GetFrameForNodeOffset(aNode, aContentOffset, aHint, ¤tOffset); if (!currentFrame) return levels; currentFrame->GetOffsets(frameStart, frameEnd); if (0 == frameStart && 0 == frameEnd) direction = eDirPrevious; else if (frameStart == currentOffset) direction = eDirPrevious; else if (frameEnd == currentOffset) direction = eDirNext; else { // we are neither at the beginning nor at the end of the frame, so we have no worries nsBidiLevel currentLevel = currentFrame->GetEmbeddingLevel(); levels.SetData(currentFrame, currentFrame, currentLevel, currentLevel); return levels; } nsIFrame *newFrame; int32_t offset; bool jumpedLine, movedOverNonSelectableText; nsresult rv = currentFrame->GetFrameFromDirection(direction, false, aJumpLines, true, &newFrame, &offset, &jumpedLine, &movedOverNonSelectableText); if (NS_FAILED(rv)) newFrame = nullptr; FrameBidiData currentBidi = currentFrame->GetBidiData(); nsBidiLevel currentLevel = currentBidi.embeddingLevel; nsBidiLevel newLevel = newFrame ? newFrame->GetEmbeddingLevel() : currentBidi.baseLevel; // If not jumping lines, disregard br frames, since they might be positioned incorrectly. // XXX This could be removed once bug 339786 is fixed. if (!aJumpLines) { if (currentFrame->IsBrFrame()) { currentFrame = nullptr; currentLevel = currentBidi.baseLevel; } if (newFrame && newFrame->IsBrFrame()) { newFrame = nullptr; newLevel = currentBidi.baseLevel; } } if (direction == eDirNext) levels.SetData(currentFrame, newFrame, currentLevel, newLevel); else levels.SetData(newFrame, currentFrame, newLevel, currentLevel); return levels; } nsresult nsFrameSelection::GetFrameFromLevel(nsIFrame *aFrameIn, nsDirection aDirection, nsBidiLevel aBidiLevel, nsIFrame **aFrameOut) const { NS_ENSURE_STATE(mShell); nsBidiLevel foundLevel = 0; nsIFrame *foundFrame = aFrameIn; nsCOMPtr frameTraversal; nsresult result; nsCOMPtr trav(do_CreateInstance(kFrameTraversalCID,&result)); if (NS_FAILED(result)) return result; result = trav->NewFrameTraversal(getter_AddRefs(frameTraversal), mShell->GetPresContext(), aFrameIn, eLeaf, false, // aVisual false, // aLockInScrollView false, // aFollowOOFs false // aSkipPopupChecks ); if (NS_FAILED(result)) return result; do { *aFrameOut = foundFrame; if (aDirection == eDirNext) frameTraversal->Next(); else frameTraversal->Prev(); foundFrame = frameTraversal->CurrentItem(); if (!foundFrame) return NS_ERROR_FAILURE; foundLevel = foundFrame->GetEmbeddingLevel(); } while (foundLevel > aBidiLevel); return NS_OK; } nsresult nsFrameSelection::MaintainSelection(nsSelectionAmount aAmount) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; mMaintainedAmount = aAmount; const nsRange* anchorFocusRange = mDomSelections[index]->GetAnchorFocusRange(); if (anchorFocusRange && aAmount != eSelectNoAmount) { mMaintainRange = anchorFocusRange->CloneRange(); return NS_OK; } mMaintainRange = nullptr; return NS_OK; } /** After moving the caret, its Bidi level is set according to the following rules: * * After moving over a character with left/right arrow, set to the Bidi level of the last moved over character. * After Home and End, set to the paragraph embedding level. * After up/down arrow, PageUp/Down, set to the lower level of the 2 surrounding characters. * After mouse click, set to the level of the current frame. * * The following two methods use GetPrevNextBidiLevels to determine the new Bidi level. * BidiLevelFromMove is called when the caret is moved in response to a keyboard event * * @param aPresShell is the presentation shell * @param aNode is the content node * @param aContentOffset is the new caret position, as an offset into aNode * @param aAmount is the amount of the move that gave the caret its new position * @param aHint is the hint indicating in what logical direction the caret moved */ void nsFrameSelection::BidiLevelFromMove(nsIPresShell* aPresShell, nsIContent* aNode, uint32_t aContentOffset, nsSelectionAmount aAmount, CaretAssociateHint aHint) { switch (aAmount) { // Movement within the line: the new cursor Bidi level is the level of the // last character moved over case eSelectCharacter: case eSelectCluster: case eSelectWord: case eSelectWordNoSpace: case eSelectBeginLine: case eSelectEndLine: case eSelectNoAmount: { nsPrevNextBidiLevels levels = GetPrevNextBidiLevels(aNode, aContentOffset, aHint, false); SetCaretBidiLevel(aHint == CARET_ASSOCIATE_BEFORE ? levels.mLevelBefore : levels.mLevelAfter); break; } /* // Up and Down: the new cursor Bidi level is the smaller of the two surrounding characters case eSelectLine: case eSelectParagraph: GetPrevNextBidiLevels(aContext, aNode, aContentOffset, &firstFrame, &secondFrame, &firstLevel, &secondLevel); aPresShell->SetCaretBidiLevel(std::min(firstLevel, secondLevel)); break; */ default: UndefineCaretBidiLevel(); } } /** * BidiLevelFromClick is called when the caret is repositioned by clicking the mouse * * @param aNode is the content node * @param aContentOffset is the new caret position, as an offset into aNode */ void nsFrameSelection::BidiLevelFromClick(nsIContent *aNode, uint32_t aContentOffset) { nsIFrame* clickInFrame=nullptr; int32_t OffsetNotUsed; clickInFrame = GetFrameForNodeOffset(aNode, aContentOffset, mHint, &OffsetNotUsed); if (!clickInFrame) return; SetCaretBidiLevel(clickInFrame->GetEmbeddingLevel()); } bool nsFrameSelection::AdjustForMaintainedSelection(nsIContent *aContent, int32_t aOffset) { if (!mMaintainRange) return false; if (!aContent) { return false; } int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return false; nsINode* rangeStartNode = mMaintainRange->GetStartContainer(); nsINode* rangeEndNode = mMaintainRange->GetEndContainer(); int32_t rangeStartOffset = mMaintainRange->StartOffset(); int32_t rangeEndOffset = mMaintainRange->EndOffset(); int32_t relToStart = nsContentUtils::ComparePoints(rangeStartNode, rangeStartOffset, aContent, aOffset); int32_t relToEnd = nsContentUtils::ComparePoints(rangeEndNode, rangeEndOffset, aContent, aOffset); // If aContent/aOffset is inside the maintained selection, or if it is on the // "anchor" side of the maintained selection, we need to do something. if ((relToStart < 0 && relToEnd > 0) || (relToStart > 0 && mDomSelections[index]->GetDirection() == eDirNext) || (relToEnd < 0 && mDomSelections[index]->GetDirection() == eDirPrevious)) { // Set the current range to the maintained range. mDomSelections[index]->ReplaceAnchorFocusRange(mMaintainRange); if (relToStart < 0 && relToEnd > 0) { // We're inside the maintained selection, just keep it selected. return true; } // Reverse the direction of the selection so that the anchor will be on the // far side of the maintained selection, relative to aContent/aOffset. mDomSelections[index]->SetDirection(relToStart > 0 ? eDirPrevious : eDirNext); } return false; } nsresult nsFrameSelection::HandleClick(nsIContent* aNewFocus, uint32_t aContentOffset, uint32_t aContentEndOffset, bool aContinueSelection, bool aMultipleSelection, CaretAssociateHint aHint) { if (!aNewFocus) return NS_ERROR_INVALID_ARG; InvalidateDesiredPos(); if (!aContinueSelection) { mMaintainRange = nullptr; if (!IsValidSelectionPoint(this, aNewFocus)) { mAncestorLimiter = nullptr; } } // Don't take focus when dragging off of a table if (!mDragSelectingCells) { BidiLevelFromClick(aNewFocus, aContentOffset); PostReason(nsISelectionListener::MOUSEDOWN_REASON + nsISelectionListener::DRAG_REASON); if (aContinueSelection && AdjustForMaintainedSelection(aNewFocus, aContentOffset)) return NS_OK; //shift clicked to maintained selection. rejected. int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); AutoPrepareFocusRange prep(mDomSelections[index], aContinueSelection, aMultipleSelection); return TakeFocus(aNewFocus, aContentOffset, aContentEndOffset, aHint, aContinueSelection, aMultipleSelection); } return NS_OK; } void nsFrameSelection::HandleDrag(nsIFrame *aFrame, nsPoint aPoint) { if (!aFrame || !mShell) return; nsresult result; nsIFrame *newFrame = 0; nsPoint newPoint; result = ConstrainFrameAndPointToAnchorSubtree(aFrame, aPoint, &newFrame, newPoint); if (NS_FAILED(result)) return; if (!newFrame) return; nsIFrame::ContentOffsets offsets = newFrame->GetContentOffsetsFromPoint(newPoint); if (!offsets.content) return; if (newFrame->IsSelected() && AdjustForMaintainedSelection(offsets.content, offsets.offset)) return; // Adjust offsets according to maintained amount if (mMaintainRange && mMaintainedAmount != eSelectNoAmount) { nsINode* rangenode = mMaintainRange->GetStartContainer(); int32_t rangeOffset = mMaintainRange->StartOffset(); int32_t relativePosition = nsContentUtils::ComparePoints(rangenode, rangeOffset, offsets.content, offsets.offset); nsDirection direction = relativePosition > 0 ? eDirPrevious : eDirNext; nsSelectionAmount amount = mMaintainedAmount; if (amount == eSelectBeginLine && direction == eDirNext) amount = eSelectEndLine; int32_t offset; nsIFrame* frame = GetFrameForNodeOffset(offsets.content, offsets.offset, CARET_ASSOCIATE_AFTER, &offset); if (frame && amount == eSelectWord && direction == eDirPrevious) { // To avoid selecting the previous word when at start of word, // first move one character forward. nsPeekOffsetStruct charPos(eSelectCharacter, eDirNext, offset, nsPoint(0, 0), false, mLimiter != nullptr, false, false, false); if (NS_SUCCEEDED(frame->PeekOffset(&charPos))) { frame = charPos.mResultFrame; offset = charPos.mContentOffset; } } nsPeekOffsetStruct pos(amount, direction, offset, nsPoint(0, 0), false, mLimiter != nullptr, false, false, false); if (frame && NS_SUCCEEDED(frame->PeekOffset(&pos)) && pos.mResultContent) { offsets.content = pos.mResultContent; offsets.offset = pos.mContentOffset; } } HandleClick(offsets.content, offsets.offset, offsets.offset, true, false, offsets.associate); } nsresult nsFrameSelection::StartAutoScrollTimer(nsIFrame *aFrame, nsPoint aPoint, uint32_t aDelay) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) { return NS_ERROR_NULL_POINTER; } return mDomSelections[index]->StartAutoScrollTimer(aFrame, aPoint, aDelay); } void nsFrameSelection::StopAutoScrollTimer() { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) { return; } mDomSelections[index]->StopAutoScrollTimer(); } /** hard to go from nodes to frames, easy the other way! */ nsresult nsFrameSelection::TakeFocus(nsIContent* aNewFocus, uint32_t aContentOffset, uint32_t aContentEndOffset, CaretAssociateHint aHint, bool aContinueSelection, bool aMultipleSelection) { if (!aNewFocus) return NS_ERROR_NULL_POINTER; NS_ENSURE_STATE(mShell); if (!IsValidSelectionPoint(this,aNewFocus)) return NS_ERROR_FAILURE; // Clear all table selection data mSelectingTableCellMode = 0; mDragSelectingCells = false; mStartSelectedCell = nullptr; mEndSelectedCell = nullptr; mAppendStartSelectedCell = nullptr; mHint = aHint; int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; Maybe userSelect; if (IsUserSelectionReason()) { userSelect.emplace(mDomSelections[index]); } //traverse through document and unselect crap here if (!aContinueSelection) {//single click? setting cursor down uint32_t batching = mBatching;//hack to use the collapse code. bool changes = mChangesDuringBatching; mBatching = 1; if (aMultipleSelection) { // Remove existing collapsed ranges as there's no point in having // non-anchor/focus collapsed ranges. mDomSelections[index]->RemoveCollapsedRanges(); RefPtr newRange = new nsRange(aNewFocus); newRange->CollapseTo(aNewFocus, aContentOffset); mDomSelections[index]->AddRange(newRange); mBatching = batching; mChangesDuringBatching = changes; } else { bool oldDesiredPosSet = mDesiredPosSet; //need to keep old desired position if it was set. mDomSelections[index]->Collapse(aNewFocus, aContentOffset); mDesiredPosSet = oldDesiredPosSet; //now reset desired pos back. mBatching = batching; mChangesDuringBatching = changes; } if (aContentEndOffset != aContentOffset) { mDomSelections[index]->Extend(aNewFocus, aContentEndOffset); } //find out if we are inside a table. if so, find out which one and which cell //once we do that, the next time we get a takefocus, check the parent tree. //if we are no longer inside same table ,cell then switch to table selection mode. // BUT only do this in an editor NS_ENSURE_STATE(mShell); bool editableCell = false; RefPtr context = mShell->GetPresContext(); if (context) { nsCOMPtr editor = do_QueryInterface(nsContentUtils::GetHTMLEditor(context)); if (editor) { nsINode* cellparent = GetCellParent(aNewFocus); nsCOMPtr editorHostNode = editor->GetActiveEditingHost(); editableCell = cellparent && editorHostNode && nsContentUtils::ContentIsDescendantOf(cellparent, editorHostNode); if (editableCell) { mCellParent = cellparent; #ifdef DEBUG_TABLE_SELECTION printf(" * TakeFocus - Collapsing into new cell\n"); #endif } } } } else { // Now update the range list: if (aContinueSelection && aNewFocus) { int32_t offset; nsINode *cellparent = GetCellParent(aNewFocus); if (mCellParent && cellparent && cellparent != mCellParent) //switch to cell selection mode { #ifdef DEBUG_TABLE_SELECTION printf(" * TakeFocus - moving into new cell\n"); #endif WidgetMouseEvent event(false, eVoidEvent, nullptr, WidgetMouseEvent::eReal); // Start selecting in the cell we were in before nsINode* parent = ParentOffset(mCellParent, &offset); if (parent) HandleTableSelection(parent, offset, nsISelectionPrivate::TABLESELECTION_CELL, &event); // Find the parent of this new cell and extend selection to it parent = ParentOffset(cellparent, &offset); // XXXX We need to REALLY get the current key shift state // (we'd need to add event listener -- let's not bother for now) event.mModifiers &= ~MODIFIER_SHIFT; //aContinueSelection; if (parent) { mCellParent = cellparent; // Continue selection into next cell HandleTableSelection(parent, offset, nsISelectionPrivate::TABLESELECTION_CELL, &event); } } else { // XXXX Problem: Shift+click in browser is appending text selection to selected table!!! // is this the place to erase seleced cells ????? if (mDomSelections[index]->GetDirection() == eDirNext && aContentEndOffset > aContentOffset) //didn't go far enough { mDomSelections[index]->Extend(aNewFocus, aContentEndOffset);//this will only redraw the diff } else mDomSelections[index]->Extend(aNewFocus, aContentOffset); } } } // Don't notify selection listeners if batching is on: if (GetBatching()) return NS_OK; // Be aware, the Selection instance may be destroyed after this call. return NotifySelectionListeners(SelectionType::eNormal); } UniquePtr nsFrameSelection::LookUpSelection(nsIContent *aContent, int32_t aContentOffset, int32_t aContentLength, bool aSlowCheck) const { if (!aContent || !mShell) return nullptr; UniquePtr details; for (size_t j = 0; j < kPresentSelectionTypeCount; j++) { if (mDomSelections[j]) { details = mDomSelections[j]->LookUpSelection(aContent, aContentOffset, aContentLength, Move(details), ToSelectionType(1 << j), aSlowCheck); } } return details; } void nsFrameSelection::SetDragState(bool aState) { if (mDragState == aState) return; mDragState = aState; if (!mDragState) { mDragSelectingCells = false; // Notify that reason is mouse up. PostReason(nsISelectionListener::MOUSEUP_REASON); // Be aware, the Selection instance may be destroyed after this call. NotifySelectionListeners(SelectionType::eNormal); } } Selection* nsFrameSelection::GetSelection(SelectionType aSelectionType) const { int8_t index = GetIndexFromSelectionType(aSelectionType); if (index < 0) return nullptr; return mDomSelections[index]; } nsresult nsFrameSelection::ScrollSelectionIntoView(SelectionType aSelectionType, SelectionRegion aRegion, int16_t aFlags) const { int8_t index = GetIndexFromSelectionType(aSelectionType); if (index < 0) return NS_ERROR_INVALID_ARG; if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; nsIPresShell::ScrollAxis verticalScroll = nsIPresShell::ScrollAxis(); int32_t flags = Selection::SCROLL_DO_FLUSH; if (aFlags & nsISelectionController::SCROLL_SYNCHRONOUS) { flags |= Selection::SCROLL_SYNCHRONOUS; } else if (aFlags & nsISelectionController::SCROLL_FIRST_ANCESTOR_ONLY) { flags |= Selection::SCROLL_FIRST_ANCESTOR_ONLY; } if (aFlags & nsISelectionController::SCROLL_OVERFLOW_HIDDEN) { flags |= Selection::SCROLL_OVERFLOW_HIDDEN; } if (aFlags & nsISelectionController::SCROLL_CENTER_VERTICALLY) { verticalScroll = nsIPresShell::ScrollAxis( nsIPresShell::SCROLL_CENTER, nsIPresShell::SCROLL_IF_NOT_FULLY_VISIBLE); } if (aFlags & nsISelectionController::SCROLL_FOR_CARET_MOVE) { flags |= Selection::SCROLL_FOR_CARET_MOVE; } // After ScrollSelectionIntoView(), the pending notifications might be // flushed and PresShell/PresContext/Frames may be dead. See bug 418470. RefPtr sel = mDomSelections[index]; return sel->ScrollIntoView(aRegion, verticalScroll, nsIPresShell::ScrollAxis(), flags); } nsresult nsFrameSelection::RepaintSelection(SelectionType aSelectionType) { int8_t index = GetIndexFromSelectionType(aSelectionType); if (index < 0) return NS_ERROR_INVALID_ARG; if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; NS_ENSURE_STATE(mShell); // On macOS, update the selection cache to the new active selection // aka the current selection. #ifdef XP_MACOSX nsFocusManager* fm = nsFocusManager::GetFocusManager(); // Check an active window exists otherwise there cannot be a current selection // and that it's a normal selection. if (fm->GetActiveWindow() && aSelectionType == SelectionType::eNormal) { UpdateSelectionCacheOnRepaintSelection(mDomSelections[index]); } #endif return mDomSelections[index]->Repaint(mShell->GetPresContext()); } nsIFrame* nsFrameSelection::GetFrameForNodeOffset(nsIContent* aNode, int32_t aOffset, CaretAssociateHint aHint, int32_t* aReturnOffset) const { if (!aNode || !aReturnOffset || !mShell) return nullptr; if (aOffset < 0) return nullptr; if (!aNode->GetPrimaryFrame() && !mShell->FrameManager()->GetDisplayContentsStyleFor(aNode)) { return nullptr; } nsIFrame* returnFrame = nullptr; nsCOMPtr theNode; while (true) { *aReturnOffset = aOffset; theNode = aNode; if (aNode->IsElement()) { int32_t childIndex = 0; int32_t numChildren = theNode->GetChildCount(); if (aHint == CARET_ASSOCIATE_BEFORE) { if (aOffset > 0) { childIndex = aOffset - 1; } else { childIndex = aOffset; } } else { NS_ASSERTION(aHint == CARET_ASSOCIATE_AFTER, "unknown direction"); if (aOffset >= numChildren) { if (numChildren > 0) { childIndex = numChildren - 1; } else { childIndex = 0; } } else { childIndex = aOffset; } } if (childIndex > 0 || numChildren > 0) { nsCOMPtr childNode = theNode->GetChildAt(childIndex); if (!childNode) { break; } theNode = childNode; } // Now that we have the child node, check if it too // can contain children. If so, descend into child. if (theNode->IsElement() && theNode->GetChildCount() && !theNode->HasIndependentSelection()) { aNode = theNode; aOffset = aOffset > childIndex ? theNode->GetChildCount() : 0; continue; } else { // Check to see if theNode is a text node. If it is, translate // aOffset into an offset into the text node. nsCOMPtr textNode = do_QueryInterface(theNode); if (textNode) { if (theNode->GetPrimaryFrame()) { if (aOffset > childIndex) { uint32_t textLength = 0; nsresult rv = textNode->GetLength(&textLength); if (NS_FAILED(rv)) { break; } *aReturnOffset = (int32_t)textLength; } else { *aReturnOffset = 0; } } else { int32_t numChildren = aNode->GetChildCount(); int32_t newChildIndex = aHint == CARET_ASSOCIATE_BEFORE ? childIndex - 1 : childIndex + 1; if (newChildIndex >= 0 && newChildIndex < numChildren) { nsCOMPtr newChildNode = aNode->GetChildAt(newChildIndex); if (!newChildNode) { return nullptr; } aNode = newChildNode; aOffset = aHint == CARET_ASSOCIATE_BEFORE ? aNode->GetChildCount() : 0; continue; } else { // newChildIndex is illegal which means we're at first or last // child. Just use original node to get the frame. theNode = aNode; } } } } } // If the node is a ShadowRoot, the frame needs to be adjusted, // because a ShadowRoot does not get a frame. Its children are rendered // as children of the host. mozilla::dom::ShadowRoot* shadowRoot = mozilla::dom::ShadowRoot::FromNode(theNode); if (shadowRoot) { theNode = shadowRoot->GetHost(); } returnFrame = theNode->GetPrimaryFrame(); if (!returnFrame) { if (aHint == CARET_ASSOCIATE_BEFORE) { if (aOffset > 0) { --aOffset; continue; } else { break; } } else { int32_t end = theNode->GetChildCount(); if (aOffset < end) { ++aOffset; continue; } else { break; } } } break; } // end while if (!returnFrame) return nullptr; // If we ended up here and were asked to position the caret after a visible // break, let's return the frame on the next line instead if it exists. if (aOffset > 0 && (uint32_t) aOffset >= aNode->Length() && theNode == aNode->GetLastChild()) { nsIFrame* newFrame; nsLayoutUtils::IsInvisibleBreak(theNode, &newFrame); if (newFrame) { returnFrame = newFrame; *aReturnOffset = 0; } } // find the child frame containing the offset we want returnFrame->GetChildFrameContainingOffset(*aReturnOffset, aHint == CARET_ASSOCIATE_AFTER, &aOffset, &returnFrame); return returnFrame; } void nsFrameSelection::CommonPageMove(bool aForward, bool aExtend, nsIScrollableFrame* aScrollableFrame) { // expected behavior for PageMove is to scroll AND move the caret // and remain relative position of the caret in view. see Bug 4302. //get the frame from the scrollable view nsIFrame* scrolledFrame = aScrollableFrame->GetScrolledFrame(); if (!scrolledFrame) return; // find out where the caret is. // we should know mDesiredPos value of nsFrameSelection, but I havent seen that behavior in other windows applications yet. nsISelection* domSel = GetSelection(SelectionType::eNormal); if (!domSel) { return; } nsRect caretPos; nsIFrame* caretFrame = nsCaret::GetGeometry(domSel, &caretPos); if (!caretFrame) return; //need to adjust caret jump by percentage scroll nsSize scrollDelta = aScrollableFrame->GetPageScrollAmount(); if (aForward) caretPos.y += scrollDelta.height; else caretPos.y -= scrollDelta.height; caretPos += caretFrame->GetOffsetTo(scrolledFrame); // get a content at desired location nsPoint desiredPoint; desiredPoint.x = caretPos.x; desiredPoint.y = caretPos.y + caretPos.height/2; nsIFrame::ContentOffsets offsets = scrolledFrame->GetContentOffsetsFromPoint(desiredPoint); if (!offsets.content) return; // scroll one page mozilla::Telemetry::Accumulate(mozilla::Telemetry::SCROLL_INPUT_METHODS, (uint32_t) ScrollInputMethod::MainThreadScrollPage); aScrollableFrame->ScrollBy(nsIntPoint(0, aForward ? 1 : -1), nsIScrollableFrame::PAGES, nsIScrollableFrame::SMOOTH); // place the caret HandleClick(offsets.content, offsets.offset, offsets.offset, aExtend, false, CARET_ASSOCIATE_AFTER); } nsresult nsFrameSelection::PhysicalMove(int16_t aDirection, int16_t aAmount, bool aExtend) { NS_ENSURE_STATE(mShell); // Flush out layout, since we need it to be up to date to do caret // positioning. mShell->FlushPendingNotifications(FlushType::Layout); if (!mShell) { return NS_OK; } // Check that parameters are safe if (aDirection < 0 || aDirection > 3 || aAmount < 0 || aAmount > 1) { return NS_ERROR_FAILURE; } nsPresContext *context = mShell->GetPresContext(); if (!context) { return NS_ERROR_FAILURE; } int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); RefPtr sel = mDomSelections[index]; if (!sel) { return NS_ERROR_NULL_POINTER; } // Map the abstract movement amounts (0-1) to direction-specific // selection units. static const nsSelectionAmount inlineAmount[] = { eSelectCluster, eSelectWord }; static const nsSelectionAmount blockPrevAmount[] = { eSelectLine, eSelectBeginLine }; static const nsSelectionAmount blockNextAmount[] = { eSelectLine, eSelectEndLine }; struct PhysicalToLogicalMapping { nsDirection direction; const nsSelectionAmount *amounts; }; static const PhysicalToLogicalMapping verticalLR[4] = { { eDirPrevious, blockPrevAmount }, // left { eDirNext, blockNextAmount }, // right { eDirPrevious, inlineAmount }, // up { eDirNext, inlineAmount } // down }; static const PhysicalToLogicalMapping verticalRL[4] = { { eDirNext, blockNextAmount }, { eDirPrevious, blockPrevAmount }, { eDirPrevious, inlineAmount }, { eDirNext, inlineAmount } }; static const PhysicalToLogicalMapping horizontal[4] = { { eDirPrevious, inlineAmount }, { eDirNext, inlineAmount }, { eDirPrevious, blockPrevAmount }, { eDirNext, blockNextAmount } }; WritingMode wm; nsIFrame *frame = nullptr; int32_t offsetused = 0; if (NS_SUCCEEDED(sel->GetPrimaryFrameForFocusNode(&frame, &offsetused, true))) { if (frame) { if (!frame->StyleContext()->IsTextCombined()) { wm = frame->GetWritingMode(); } else { // Using different direction for horizontal-in-vertical would // make it hard to navigate via keyboard. Inherit the moving // direction from its parent. MOZ_ASSERT(frame->IsTextFrame()); wm = frame->GetParent()->GetWritingMode(); MOZ_ASSERT(wm.IsVertical(), "Text combined " "can only appear in vertical text"); } } } const PhysicalToLogicalMapping& mapping = wm.IsVertical() ? wm.IsVerticalLR() ? verticalLR[aDirection] : verticalRL[aDirection] : horizontal[aDirection]; nsresult rv = MoveCaret(mapping.direction, aExtend, mapping.amounts[aAmount], eVisual); if (NS_FAILED(rv)) { // If we tried to do a line move, but couldn't move in the given direction, // then we'll "promote" this to a line-edge move instead. if (mapping.amounts[aAmount] == eSelectLine) { rv = MoveCaret(mapping.direction, aExtend, mapping.amounts[aAmount + 1], eVisual); } // And if it was a next-word move that failed (which can happen when // eat_space_to_next_word is true, see bug 1153237), then just move forward // to the line-edge. else if (mapping.amounts[aAmount] == eSelectWord && mapping.direction == eDirNext) { rv = MoveCaret(eDirNext, aExtend, eSelectEndLine, eVisual); } } return rv; } nsresult nsFrameSelection::CharacterMove(bool aForward, bool aExtend) { return MoveCaret(aForward ? eDirNext : eDirPrevious, aExtend, eSelectCluster, eUsePrefStyle); } nsresult nsFrameSelection::CharacterExtendForDelete() { return MoveCaret(eDirNext, true, eSelectCluster, eLogical); } nsresult nsFrameSelection::CharacterExtendForBackspace() { return MoveCaret(eDirPrevious, true, eSelectCharacter, eLogical); } nsresult nsFrameSelection::WordMove(bool aForward, bool aExtend) { return MoveCaret(aForward ? eDirNext : eDirPrevious, aExtend, eSelectWord, eUsePrefStyle); } nsresult nsFrameSelection::WordExtendForDelete(bool aForward) { return MoveCaret(aForward ? eDirNext : eDirPrevious, true, eSelectWord, eLogical); } nsresult nsFrameSelection::LineMove(bool aForward, bool aExtend) { return MoveCaret(aForward ? eDirNext : eDirPrevious, aExtend, eSelectLine, eUsePrefStyle); } nsresult nsFrameSelection::IntraLineMove(bool aForward, bool aExtend) { if (aForward) { return MoveCaret(eDirNext, aExtend, eSelectEndLine, eLogical); } else { return MoveCaret(eDirPrevious, aExtend, eSelectBeginLine, eLogical); } } nsresult nsFrameSelection::SelectAll() { nsCOMPtr rootContent; if (mLimiter) { rootContent = mLimiter;//addrefit } else if (mAncestorLimiter) { rootContent = mAncestorLimiter; } else { NS_ENSURE_STATE(mShell); nsIDocument *doc = mShell->GetDocument(); if (!doc) return NS_ERROR_FAILURE; rootContent = doc->GetRootElement(); if (!rootContent) return NS_ERROR_FAILURE; } int32_t numChildren = rootContent->GetChildCount(); PostReason(nsISelectionListener::NO_REASON); int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); AutoPrepareFocusRange prep(mDomSelections[index], false, false); return TakeFocus(rootContent, 0, numChildren, CARET_ASSOCIATE_BEFORE, false, false); } //////////END FRAMESELECTION void nsFrameSelection::StartBatchChanges() { mBatching++; } void nsFrameSelection::EndBatchChanges(int16_t aReason) { mBatching--; NS_ASSERTION(mBatching >=0,"Bad mBatching"); if (mBatching == 0 && mChangesDuringBatching) { int16_t postReason = PopReason() | aReason; PostReason(postReason); mChangesDuringBatching = false; // Be aware, the Selection instance may be destroyed after this call. NotifySelectionListeners(SelectionType::eNormal); } } nsresult nsFrameSelection::NotifySelectionListeners(SelectionType aSelectionType) { int8_t index = GetIndexFromSelectionType(aSelectionType); if (index >=0 && mDomSelections[index]) { RefPtr selection = mDomSelections[index]; return selection->NotifySelectionListeners(); } return NS_ERROR_FAILURE; } // Start of Table Selection methods static bool IsCell(nsIContent *aContent) { return aContent->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th); } nsITableCellLayout* nsFrameSelection::GetCellLayout(nsIContent *aCellContent) const { NS_ENSURE_TRUE(mShell, nullptr); nsITableCellLayout *cellLayoutObject = do_QueryFrame(aCellContent->GetPrimaryFrame()); return cellLayoutObject; } nsresult nsFrameSelection::ClearNormalSelection() { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; return mDomSelections[index]->RemoveAllRanges(); } static nsIContent* GetFirstSelectedContent(nsRange* aRange) { if (!aRange) { return nullptr; } NS_PRECONDITION(aRange->GetStartContainer(), "Must have start parent!"); NS_PRECONDITION(aRange->GetStartContainer()->IsElement(), "Unexpected parent"); return aRange->GetStartContainer()->GetChildAt(aRange->StartOffset()); } // Table selection support. // TODO: Separate table methods into a separate nsITableSelection interface nsresult nsFrameSelection::HandleTableSelection(nsINode* aParentContent, int32_t aContentOffset, int32_t aTarget, WidgetMouseEvent* aMouseEvent) { NS_ENSURE_TRUE(aParentContent, NS_ERROR_NULL_POINTER); NS_ENSURE_TRUE(aMouseEvent, NS_ERROR_NULL_POINTER); if (mDragState && mDragSelectingCells && (aTarget & nsISelectionPrivate::TABLESELECTION_TABLE)) { // We were selecting cells and user drags mouse in table border or inbetween cells, // just do nothing return NS_OK; } nsresult result = NS_OK; nsIContent *childContent = aParentContent->GetChildAt(aContentOffset); // When doing table selection, always set the direction to next so // we can be sure that anchorNode's offset always points to the // selected cell int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; mDomSelections[index]->SetDirection(eDirNext); // Stack-class to wrap all table selection changes in // BeginBatchChanges() / EndBatchChanges() SelectionBatcher selectionBatcher(mDomSelections[index]); int32_t startRowIndex, startColIndex, curRowIndex, curColIndex; if (mDragState && mDragSelectingCells) { // We are drag-selecting if (aTarget != nsISelectionPrivate::TABLESELECTION_TABLE) { // If dragging in the same cell as last event, do nothing if (mEndSelectedCell == childContent) return NS_OK; #ifdef DEBUG_TABLE_SELECTION printf(" mStartSelectedCell = %p, mEndSelectedCell = %p, childContent = %p \n", mStartSelectedCell.get(), mEndSelectedCell.get(), childContent); #endif // aTarget can be any "cell mode", // so we can easily drag-select rows and columns // Once we are in row or column mode, // we can drift into any cell to stay in that mode // even if aTarget = TABLESELECTION_CELL if (mSelectingTableCellMode == nsISelectionPrivate::TABLESELECTION_ROW || mSelectingTableCellMode == nsISelectionPrivate::TABLESELECTION_COLUMN) { if (mEndSelectedCell) { // Also check if cell is in same row/col result = GetCellIndexes(mEndSelectedCell, startRowIndex, startColIndex); if (NS_FAILED(result)) return result; result = GetCellIndexes(childContent, curRowIndex, curColIndex); if (NS_FAILED(result)) return result; #ifdef DEBUG_TABLE_SELECTION printf(" curRowIndex = %d, startRowIndex = %d, curColIndex = %d, startColIndex = %d\n", curRowIndex, startRowIndex, curColIndex, startColIndex); #endif if ((mSelectingTableCellMode == nsISelectionPrivate::TABLESELECTION_ROW && startRowIndex == curRowIndex) || (mSelectingTableCellMode == nsISelectionPrivate::TABLESELECTION_COLUMN && startColIndex == curColIndex)) return NS_OK; } #ifdef DEBUG_TABLE_SELECTION printf(" Dragged into a new column or row\n"); #endif // Continue dragging row or column selection return SelectRowOrColumn(childContent, mSelectingTableCellMode); } else if (mSelectingTableCellMode == nsISelectionPrivate::TABLESELECTION_CELL) { #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Dragged into a new cell\n"); #endif // Trick for quick selection of rows and columns // Hold down shift, then start selecting in one direction // If next cell dragged into is in same row, select entire row, // if next cell is in same column, select entire column if (mStartSelectedCell && aMouseEvent->IsShift()) { result = GetCellIndexes(mStartSelectedCell, startRowIndex, startColIndex); if (NS_FAILED(result)) return result; result = GetCellIndexes(childContent, curRowIndex, curColIndex); if (NS_FAILED(result)) return result; if (startRowIndex == curRowIndex || startColIndex == curColIndex) { // Force new selection block mStartSelectedCell = nullptr; mDomSelections[index]->RemoveAllRanges(); if (startRowIndex == curRowIndex) mSelectingTableCellMode = nsISelectionPrivate::TABLESELECTION_ROW; else mSelectingTableCellMode = nsISelectionPrivate::TABLESELECTION_COLUMN; return SelectRowOrColumn(childContent, mSelectingTableCellMode); } } // Reselect block of cells to new end location return SelectBlockOfCells(mStartSelectedCell, childContent); } } // Do nothing if dragging in table, but outside a cell return NS_OK; } else { // Not dragging -- mouse event is down or up if (mDragState) { #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Mouse down event\n"); #endif // Clear cell we stored in mouse-down mUnselectCellOnMouseUp = nullptr; if (aTarget == nsISelectionPrivate::TABLESELECTION_CELL) { bool isSelected = false; // Check if we have other selected cells nsIContent* previousCellNode = GetFirstSelectedContent(GetFirstCellRange()); if (previousCellNode) { // We have at least 1 other selected cell // Check if new cell is already selected nsIFrame *cellFrame = childContent->GetPrimaryFrame(); if (!cellFrame) return NS_ERROR_NULL_POINTER; isSelected = cellFrame->IsSelected(); } else { // No cells selected -- remove non-cell selection mDomSelections[index]->RemoveAllRanges(); } mDragSelectingCells = true; // Signal to start drag-cell-selection mSelectingTableCellMode = aTarget; // Set start for new drag-selection block (not appended) mStartSelectedCell = childContent; // The initial block end is same as the start mEndSelectedCell = childContent; if (isSelected) { // Remember this cell to (possibly) unselect it on mouseup mUnselectCellOnMouseUp = childContent; #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Saving mUnselectCellOnMouseUp\n"); #endif } else { // Select an unselected cell // but first remove existing selection if not in same table if (previousCellNode && !IsInSameTable(previousCellNode, childContent)) { mDomSelections[index]->RemoveAllRanges(); // Reset selection mode that is cleared in RemoveAllRanges mSelectingTableCellMode = aTarget; } return SelectCellElement(childContent); } return NS_OK; } else if (aTarget == nsISelectionPrivate::TABLESELECTION_TABLE) { //TODO: We currently select entire table when clicked between cells, // should we restrict to only around border? // *** How do we get location data for cell and click? mDragSelectingCells = false; mStartSelectedCell = nullptr; mEndSelectedCell = nullptr; // Remove existing selection and select the table mDomSelections[index]->RemoveAllRanges(); return CreateAndAddRange(aParentContent, aContentOffset); } else if (aTarget == nsISelectionPrivate::TABLESELECTION_ROW || aTarget == nsISelectionPrivate::TABLESELECTION_COLUMN) { #ifdef DEBUG_TABLE_SELECTION printf("aTarget == %d\n", aTarget); #endif // Start drag-selecting mode so multiple rows/cols can be selected // Note: Currently, nsFrame::GetDataForTableSelection // will never call us for row or column selection on mouse down mDragSelectingCells = true; // Force new selection block mStartSelectedCell = nullptr; mDomSelections[index]->RemoveAllRanges(); // Always do this AFTER RemoveAllRanges mSelectingTableCellMode = aTarget; return SelectRowOrColumn(childContent, aTarget); } } else { #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Mouse UP event. mDragSelectingCells=%d, mStartSelectedCell=%p\n", mDragSelectingCells, mStartSelectedCell.get()); #endif // First check if we are extending a block selection int32_t rangeCount; result = mDomSelections[index]->GetRangeCount(&rangeCount); if (NS_FAILED(result)) return result; if (rangeCount > 0 && aMouseEvent->IsShift() && mAppendStartSelectedCell && mAppendStartSelectedCell != childContent) { // Shift key is down: append a block selection mDragSelectingCells = false; return SelectBlockOfCells(mAppendStartSelectedCell, childContent); } if (mDragSelectingCells) mAppendStartSelectedCell = mStartSelectedCell; mDragSelectingCells = false; mStartSelectedCell = nullptr; mEndSelectedCell = nullptr; // Any other mouseup actions require that Ctrl or Cmd key is pressed // else stop table selection mode bool doMouseUpAction = false; #ifdef XP_MACOSX doMouseUpAction = aMouseEvent->IsMeta(); #else doMouseUpAction = aMouseEvent->IsControl(); #endif if (!doMouseUpAction) { #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Ending cell selection on mouseup: mAppendStartSelectedCell=%p\n", mAppendStartSelectedCell.get()); #endif return NS_OK; } // Unselect a cell only if it wasn't // just selected on mousedown if( childContent == mUnselectCellOnMouseUp) { // Scan ranges to find the cell to unselect (the selection range to remove) // XXXbz it's really weird that this lives outside the loop, so once we // find one we keep looking at it even if we find no more cells... nsINode* previousCellParent = nullptr; #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Unselecting mUnselectCellOnMouseUp; rangeCount=%d\n", rangeCount); #endif for( int32_t i = 0; i < rangeCount; i++) { // Strong reference, because sometimes we want to remove // this range, and then we might be the only owner. RefPtr range = mDomSelections[index]->GetRangeAt(i); if (!range) return NS_ERROR_NULL_POINTER; nsINode* container = range->GetStartContainer(); if (!container) { return NS_ERROR_NULL_POINTER; } int32_t offset = range->StartOffset(); // Be sure previous selection is a table cell nsIContent* child = container->GetChildAt(offset); if (child && IsCell(child)) { previousCellParent = container; } // We're done if we didn't find parent of a previously-selected cell if (!previousCellParent) break; if (previousCellParent == aParentContent && offset == aContentOffset) { // Cell is already selected if (rangeCount == 1) { #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Unselecting single selected cell\n"); #endif // This was the only cell selected. // Collapse to "normal" selection inside the cell mStartSelectedCell = nullptr; mEndSelectedCell = nullptr; mAppendStartSelectedCell = nullptr; //TODO: We need a "Collapse to just before deepest child" routine // Even better, should we collapse to just after the LAST deepest child // (i.e., at the end of the cell's contents)? return mDomSelections[index]->Collapse(childContent, 0); } #ifdef DEBUG_TABLE_SELECTION printf("HandleTableSelection: Removing cell from multi-cell selection\n"); #endif // Unselecting the start of previous block // XXX What do we use now! if (childContent == mAppendStartSelectedCell) mAppendStartSelectedCell = nullptr; // Deselect cell by removing its range from selection return mDomSelections[index]->RemoveRange(range); } } mUnselectCellOnMouseUp = nullptr; } } } return result; } nsresult nsFrameSelection::SelectBlockOfCells(nsIContent *aStartCell, nsIContent *aEndCell) { NS_ENSURE_TRUE(aStartCell, NS_ERROR_NULL_POINTER); NS_ENSURE_TRUE(aEndCell, NS_ERROR_NULL_POINTER); mEndSelectedCell = aEndCell; nsresult result = NS_OK; // If new end cell is in a different table, do nothing nsIContent* table = IsInSameTable(aStartCell, aEndCell); if (!table) { return NS_OK; } // Get starting and ending cells' location in the cellmap int32_t startRowIndex, startColIndex, endRowIndex, endColIndex; result = GetCellIndexes(aStartCell, startRowIndex, startColIndex); if(NS_FAILED(result)) return result; result = GetCellIndexes(aEndCell, endRowIndex, endColIndex); if(NS_FAILED(result)) return result; if (mDragSelectingCells) { // Drag selecting: remove selected cells outside of new block limits UnselectCells(table, startRowIndex, startColIndex, endRowIndex, endColIndex, true); } // Note that we select block in the direction of user's mouse dragging, // which means start cell may be after the end cell in either row or column return AddCellsToSelection(table, startRowIndex, startColIndex, endRowIndex, endColIndex); } nsresult nsFrameSelection::UnselectCells(nsIContent *aTableContent, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex, bool aRemoveOutsideOfCellRange) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; nsTableWrapperFrame* tableFrame = do_QueryFrame(aTableContent->GetPrimaryFrame()); if (!tableFrame) return NS_ERROR_FAILURE; int32_t minRowIndex = std::min(aStartRowIndex, aEndRowIndex); int32_t maxRowIndex = std::max(aStartRowIndex, aEndRowIndex); int32_t minColIndex = std::min(aStartColumnIndex, aEndColumnIndex); int32_t maxColIndex = std::max(aStartColumnIndex, aEndColumnIndex); // Strong reference because we sometimes remove the range RefPtr range = GetFirstCellRange(); nsIContent* cellNode = GetFirstSelectedContent(range); NS_PRECONDITION(!range || cellNode, "Must have cellNode if had a range"); int32_t curRowIndex, curColIndex; while (cellNode) { nsresult result = GetCellIndexes(cellNode, curRowIndex, curColIndex); if (NS_FAILED(result)) return result; #ifdef DEBUG_TABLE_SELECTION if (!range) printf("RemoveCellsToSelection -- range is null\n"); #endif if (range) { if (aRemoveOutsideOfCellRange) { if (curRowIndex < minRowIndex || curRowIndex > maxRowIndex || curColIndex < minColIndex || curColIndex > maxColIndex) { mDomSelections[index]->RemoveRange(range); // Since we've removed the range, decrement pointer to next range mSelectedCellIndex--; } } else { // Remove cell from selection if it belongs to the given cells range or // it is spanned onto the cells range. nsTableCellFrame* cellFrame = tableFrame->GetCellFrameAt(curRowIndex, curColIndex); int32_t origRowIndex, origColIndex; cellFrame->GetRowIndex(origRowIndex); cellFrame->GetColIndex(origColIndex); uint32_t actualRowSpan = tableFrame->GetEffectiveRowSpanAt(origRowIndex, origColIndex); uint32_t actualColSpan = tableFrame->GetEffectiveColSpanAt(curRowIndex, curColIndex); if (origRowIndex <= maxRowIndex && maxRowIndex >= 0 && origRowIndex + actualRowSpan - 1 >= static_cast(minRowIndex) && origColIndex <= maxColIndex && maxColIndex >= 0 && origColIndex + actualColSpan - 1 >= static_cast(minColIndex)) { mDomSelections[index]->RemoveRange(range); // Since we've removed the range, decrement pointer to next range mSelectedCellIndex--; } } } range = GetNextCellRange(); cellNode = GetFirstSelectedContent(range); NS_PRECONDITION(!range || cellNode, "Must have cellNode if had a range"); } return NS_OK; } nsresult nsFrameSelection::AddCellsToSelection(nsIContent *aTableContent, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; nsTableWrapperFrame* tableFrame = do_QueryFrame(aTableContent->GetPrimaryFrame()); if (!tableFrame) // Check that |table| is a table. return NS_ERROR_FAILURE; nsresult result = NS_OK; int32_t row = aStartRowIndex; while(true) { int32_t col = aStartColumnIndex; while(true) { nsTableCellFrame* cellFrame = tableFrame->GetCellFrameAt(row, col); // Skip cells that are spanned from previous locations or are already selected if (cellFrame) { int32_t origRow, origCol; cellFrame->GetRowIndex(origRow); cellFrame->GetColIndex(origCol); if (origRow == row && origCol == col && !cellFrame->IsSelected()) { result = SelectCellElement(cellFrame->GetContent()); if (NS_FAILED(result)) return result; } } // Done when we reach end column if (col == aEndColumnIndex) break; if (aStartColumnIndex < aEndColumnIndex) col ++; else col--; } if (row == aEndRowIndex) break; if (aStartRowIndex < aEndRowIndex) row++; else row--; } return result; } nsresult nsFrameSelection::RemoveCellsFromSelection(nsIContent *aTable, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex) { return UnselectCells(aTable, aStartRowIndex, aStartColumnIndex, aEndRowIndex, aEndColumnIndex, false); } nsresult nsFrameSelection::RestrictCellsToSelection(nsIContent *aTable, int32_t aStartRowIndex, int32_t aStartColumnIndex, int32_t aEndRowIndex, int32_t aEndColumnIndex) { return UnselectCells(aTable, aStartRowIndex, aStartColumnIndex, aEndRowIndex, aEndColumnIndex, true); } nsresult nsFrameSelection::SelectRowOrColumn(nsIContent *aCellContent, uint32_t aTarget) { if (!aCellContent) return NS_ERROR_NULL_POINTER; nsIContent* table = GetParentTable(aCellContent); if (!table) return NS_ERROR_NULL_POINTER; // Get table and cell layout interfaces to access // cell data based on cellmap location // Frames are not ref counted, so don't use an nsCOMPtr nsTableWrapperFrame* tableFrame = do_QueryFrame(table->GetPrimaryFrame()); if (!tableFrame) return NS_ERROR_FAILURE; nsITableCellLayout *cellLayout = GetCellLayout(aCellContent); if (!cellLayout) return NS_ERROR_FAILURE; // Get location of target cell: int32_t rowIndex, colIndex; nsresult result = cellLayout->GetCellIndexes(rowIndex, colIndex); if (NS_FAILED(result)) return result; // Be sure we start at proper beginning // (This allows us to select row or col given ANY cell!) if (aTarget == nsISelectionPrivate::TABLESELECTION_ROW) colIndex = 0; if (aTarget == nsISelectionPrivate::TABLESELECTION_COLUMN) rowIndex = 0; nsCOMPtr firstCell, lastCell; while (true) { // Loop through all cells in column or row to find first and last nsCOMPtr curCellContent = tableFrame->GetCellAt(rowIndex, colIndex); if (!curCellContent) break; if (!firstCell) firstCell = curCellContent; lastCell = curCellContent.forget(); // Move to next cell in cellmap, skipping spanned locations if (aTarget == nsISelectionPrivate::TABLESELECTION_ROW) colIndex += tableFrame->GetEffectiveRowSpanAt(rowIndex, colIndex); else rowIndex += tableFrame->GetEffectiveRowSpanAt(rowIndex, colIndex); } // Use SelectBlockOfCells: // This will replace existing selection, // but allow unselecting by dragging out of selected region if (firstCell && lastCell) { if (!mStartSelectedCell) { // We are starting a new block, so select the first cell result = SelectCellElement(firstCell); if (NS_FAILED(result)) return result; mStartSelectedCell = firstCell; } nsCOMPtr lastCellContent = do_QueryInterface(lastCell); result = SelectBlockOfCells(mStartSelectedCell, lastCellContent); // This gets set to the cell at end of row/col, // but we need it to be the cell under cursor mEndSelectedCell = aCellContent; return result; } #if 0 // This is a more efficient strategy that appends row to current selection, // but doesn't allow dragging OFF of an existing selection to unselect! do { // Loop through all cells in column or row result = tableLayout->GetCellDataAt(rowIndex, colIndex, getter_AddRefs(cellElement), curRowIndex, curColIndex, rowSpan, colSpan, actualRowSpan, actualColSpan, isSelected); if (NS_FAILED(result)) return result; // We're done when cell is not found if (!cellElement) break; // Check spans else we infinitely loop NS_ASSERTION(actualColSpan, "actualColSpan is 0!"); NS_ASSERTION(actualRowSpan, "actualRowSpan is 0!"); // Skip cells that are already selected or span from outside our region if (!isSelected && rowIndex == curRowIndex && colIndex == curColIndex) { result = SelectCellElement(cellElement); if (NS_FAILED(result)) return result; } // Move to next row or column in cellmap, skipping spanned locations if (aTarget == nsISelectionPrivate::TABLESELECTION_ROW) colIndex += actualColSpan; else rowIndex += actualRowSpan; } while (cellElement); #endif return NS_OK; } nsIContent* nsFrameSelection::GetFirstCellNodeInRange(nsRange *aRange) const { if (!aRange) return nullptr; nsINode* startContainer = aRange->GetStartContainer(); if (!startContainer) { return nullptr; } int32_t offset = aRange->StartOffset(); nsIContent* childContent = startContainer->GetChildAt(offset); if (!childContent) return nullptr; // Don't return node if not a cell if (!IsCell(childContent)) return nullptr; return childContent; } nsRange* nsFrameSelection::GetFirstCellRange() { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return nullptr; nsRange* firstRange = mDomSelections[index]->GetRangeAt(0); if (!GetFirstCellNodeInRange(firstRange)) { return nullptr; } // Setup for next cell mSelectedCellIndex = 1; return firstRange; } nsRange* nsFrameSelection::GetNextCellRange() { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return nullptr; nsRange* range = mDomSelections[index]->GetRangeAt(mSelectedCellIndex); // Get first node in next range of selection - test if it's a cell if (!GetFirstCellNodeInRange(range)) { return nullptr; } // Setup for next cell mSelectedCellIndex++; return range; } nsresult nsFrameSelection::GetCellIndexes(nsIContent *aCell, int32_t &aRowIndex, int32_t &aColIndex) { if (!aCell) return NS_ERROR_NULL_POINTER; aColIndex=0; // initialize out params aRowIndex=0; nsITableCellLayout *cellLayoutObject = GetCellLayout(aCell); if (!cellLayoutObject) return NS_ERROR_FAILURE; return cellLayoutObject->GetCellIndexes(aRowIndex, aColIndex); } nsIContent* nsFrameSelection::IsInSameTable(nsIContent *aContent1, nsIContent *aContent2) const { if (!aContent1 || !aContent2) return nullptr; nsIContent* tableNode1 = GetParentTable(aContent1); nsIContent* tableNode2 = GetParentTable(aContent2); // Must be in the same table. Note that we want to return false for // the test if both tables are null. return (tableNode1 == tableNode2) ? tableNode1 : nullptr; } nsIContent* nsFrameSelection::GetParentTable(nsIContent *aCell) const { if (!aCell) { return nullptr; } for (nsIContent* parent = aCell->GetParent(); parent; parent = parent->GetParent()) { if (parent->IsHTMLElement(nsGkAtoms::table)) { return parent; } } return nullptr; } nsresult nsFrameSelection::SelectCellElement(nsIContent *aCellElement) { nsIContent *parent = aCellElement->GetParent(); // Get child offset int32_t offset = parent->IndexOf(aCellElement); return CreateAndAddRange(parent, offset); } nsresult nsFrameSelection::CreateAndAddRange(nsINode* aContainer, int32_t aOffset) { if (!aContainer) { return NS_ERROR_NULL_POINTER; } RefPtr range = new nsRange(aContainer); // Set range around child at given offset nsresult rv = range->SetStartAndEnd(aContainer, aOffset, aContainer, aOffset + 1); if (NS_WARN_IF(NS_FAILED(rv))) { return rv; } int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; return mDomSelections[index]->AddRange(range); } // End of Table Selection void nsFrameSelection::SetAncestorLimiter(nsIContent *aLimiter) { if (mAncestorLimiter != aLimiter) { mAncestorLimiter = aLimiter; int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return; if (!IsValidSelectionPoint(this, mDomSelections[index]->GetFocusNode())) { ClearNormalSelection(); if (mAncestorLimiter) { PostReason(nsISelectionListener::NO_REASON); TakeFocus(mAncestorLimiter, 0, 0, CARET_ASSOCIATE_BEFORE, false, false); } } } } nsresult nsFrameSelection::DeleteFromDocument() { nsresult res; // If we're already collapsed, then we do nothing (bug 719503). bool isCollapsed; int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); if (!mDomSelections[index]) return NS_ERROR_NULL_POINTER; mDomSelections[index]->GetIsCollapsed( &isCollapsed); if (isCollapsed) { return NS_OK; } RefPtr selection = mDomSelections[index]; for (uint32_t rangeIdx = 0; rangeIdx < selection->RangeCount(); ++rangeIdx) { RefPtr range = selection->GetRangeAt(rangeIdx); res = range->DeleteContents(); if (NS_FAILED(res)) return res; } // Collapse to the new location. // If we deleted one character, then we move back one element. // FIXME We don't know how to do this past frame boundaries yet. if (isCollapsed) mDomSelections[index]->Collapse(mDomSelections[index]->GetAnchorNode(), mDomSelections[index]->AnchorOffset()-1); else if (mDomSelections[index]->AnchorOffset() > 0) mDomSelections[index]->Collapse(mDomSelections[index]->GetAnchorNode(), mDomSelections[index]->AnchorOffset()); #ifdef DEBUG else printf("Don't know how to set selection back past frame boundary\n"); #endif return NS_OK; } void nsFrameSelection::SetDelayedCaretData(WidgetMouseEvent* aMouseEvent) { if (aMouseEvent) { mDelayedMouseEventValid = true; mDelayedMouseEventIsShift = aMouseEvent->IsShift(); mDelayedMouseEventClickCount = aMouseEvent->mClickCount; } else { mDelayedMouseEventValid = false; } } void nsFrameSelection::DisconnectFromPresShell() { RefPtr eventHub = mShell->GetAccessibleCaretEventHub(); if (eventHub) { int8_t index = GetIndexFromSelectionType(SelectionType::eNormal); mDomSelections[index]->RemoveSelectionListener(eventHub); } StopAutoScrollTimer(); for (size_t i = 0; i < kPresentSelectionTypeCount; i++) { mDomSelections[i]->Clear(nullptr); } mShell = nullptr; } /** * See Bug 1288453. * * Update the selection cache on repaint to handle when a pre-existing * selection becomes active aka the current selection. * * 1. Change the current selection by click n dragging another selection. * - Make a selection on content page. Make a selection in a text editor. * - You can click n drag the content selection to make it active again. * 2. Change the current selection when switching to a tab with a selection. * - Make selection in tab. * - Switching tabs will make its respective selection active. * * Therefore, we only update the selection cache on a repaint * if the current selection being repainted is not an empty selection. * * If the current selection is empty. The current selection cache * would be cleared by nsAutoCopyListener::NotifySelectionChanged. */ nsresult nsFrameSelection::UpdateSelectionCacheOnRepaintSelection(Selection* aSel) { nsIPresShell* ps = aSel->GetPresShell(); if (!ps) { return NS_OK; } nsCOMPtr aDoc = ps->GetDocument(); bool collapsed; if (aDoc && aSel && NS_SUCCEEDED(aSel->GetIsCollapsed(&collapsed)) && !collapsed) { return nsCopySupport::HTMLCopy(aSel, aDoc, nsIClipboard::kSelectionCache, false); } return NS_OK; } // nsAutoCopyListener nsAutoCopyListener* nsAutoCopyListener::sInstance = nullptr; NS_IMPL_ISUPPORTS(nsAutoCopyListener, nsISelectionListener) /* * What we do now: * On every selection change, we copy to the clipboard anew, creating a * HTML buffer, a transferable, an nsISupportsString and * a huge mess every time. This is basically what nsPresShell::DoCopy does * to move the selection into the clipboard for Edit->Copy. * * What we should do, to make our end of the deal faster: * Create a singleton transferable with our own magic converter. When selection * changes (use a quick cache to detect ``real'' changes), we put the new * nsISelection in the transferable. Our magic converter will take care of * transferable->whatever-other-format when the time comes to actually * hand over the clipboard contents. * * Other issues: * - which X clipboard should we populate? * - should we use a different one than Edit->Copy, so that inadvertant * selections (or simple clicks, which currently cause a selection * notification, regardless of if they're in the document which currently has * selection!) don't lose the contents of the ``application''? Or should we * just put some intelligence in the ``is this a real selection?'' code to * protect our selection against clicks in other documents that don't create * selections? * - maybe we should just never clear the X clipboard? That would make this * problem just go away, which is very tempting. * * On macOS, * nsIClipboard::kSelectionCache is the flag for current selection cache. * Set the current selection cache on the parent process in * widget cocoa nsClipboard whenever selection changes. */ NS_IMETHODIMP nsAutoCopyListener::NotifySelectionChanged(nsIDOMDocument *aDoc, nsISelection *aSel, int16_t aReason) { if (mCachedClipboard == nsIClipboard::kSelectionCache) { nsFocusManager* fm = nsFocusManager::GetFocusManager(); // If no active window, do nothing because a current selection changed // cannot occur unless it is in the active window. if (!fm->GetActiveWindow()) { return NS_OK; } } if (!(aReason & nsISelectionListener::MOUSEUP_REASON || aReason & nsISelectionListener::SELECTALL_REASON || aReason & nsISelectionListener::KEYPRESS_REASON)) return NS_OK; //dont care if we are still dragging bool collapsed; if (!aDoc || !aSel || NS_FAILED(aSel->GetIsCollapsed(&collapsed)) || collapsed) { #ifdef DEBUG_CLIPBOARD fprintf(stderr, "CLIPBOARD: no selection/collapsed selection\n"); #endif // If on macOS, clear the current selection transferable cached // on the parent process (nsClipboard) when the selection is empty. if (mCachedClipboard == nsIClipboard::kSelectionCache) { return nsCopySupport::ClearSelectionCache(); } /* clear X clipboard? */ return NS_OK; } nsCOMPtr doc = do_QueryInterface(aDoc); NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE); // call the copy code return nsCopySupport::HTMLCopy(aSel, doc, mCachedClipboard, false); }