/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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/. */ // // Eric Vaughan // Netscape Communications // // See documentation in associated header file // #include "nsSplitterFrame.h" #include "nsGkAtoms.h" #include "nsIDOMElement.h" #include "nsIDOMXULElement.h" #include "nsPresContext.h" #include "nsRenderingContext.h" #include "nsIDocument.h" #include "nsINameSpaceManager.h" #include "nsScrollbarButtonFrame.h" #include "nsIDOMEventListener.h" #include "nsIDOMMouseEvent.h" #include "nsIPresShell.h" #include "nsFrameList.h" #include "nsHTMLParts.h" #include "nsStyleContext.h" #include "nsBoxLayoutState.h" #include "nsIServiceManager.h" #include "nsContainerFrame.h" #include "nsAutoPtr.h" #include "nsContentCID.h" #include "nsStyleSet.h" #include "nsLayoutUtils.h" #include "nsDisplayList.h" #include "nsContentUtils.h" #include "mozilla/dom/Element.h" #include "mozilla/MouseEvents.h" using namespace mozilla; class nsSplitterInfo { public: nscoord min; nscoord max; nscoord current; nscoord changed; nsCOMPtr childElem; int32_t flex; int32_t index; }; class nsSplitterFrameInner : public nsIDOMEventListener { public: NS_DECL_ISUPPORTS NS_DECL_NSIDOMEVENTLISTENER nsSplitterFrameInner(nsSplitterFrame* aSplitter) { mOuter = aSplitter; mPressed = false; } virtual ~nsSplitterFrameInner(); void Disconnect() { mOuter = nullptr; } nsresult MouseDown(nsIDOMEvent* aMouseEvent); nsresult MouseUp(nsIDOMEvent* aMouseEvent); nsresult MouseMove(nsIDOMEvent* aMouseEvent); void MouseDrag(nsPresContext* aPresContext, WidgetGUIEvent* aEvent); void MouseUp(nsPresContext* aPresContext, WidgetGUIEvent* aEvent); void AdjustChildren(nsPresContext* aPresContext); void AdjustChildren(nsPresContext* aPresContext, nsSplitterInfo* aChildInfos, int32_t aCount, bool aIsHorizontal); void AddRemoveSpace(nscoord aDiff, nsSplitterInfo* aChildInfos, int32_t aCount, int32_t& aSpaceLeft); void ResizeChildTo(nsPresContext* aPresContext, nscoord& aDiff, nsSplitterInfo* aChildrenBeforeInfos, nsSplitterInfo* aChildrenAfterInfos, int32_t aChildrenBeforeCount, int32_t aChildrenAfterCount, bool aBounded); void UpdateState(); void AddListener(nsPresContext* aPresContext); void RemoveListener(); enum ResizeType { Closest, Farthest, Flex, Grow }; enum State { Open, CollapsedBefore, CollapsedAfter, Dragging }; enum CollapseDirection { Before, After }; ResizeType GetResizeBefore(); ResizeType GetResizeAfter(); State GetState(); void Reverse(nsSplitterInfo*& aIndexes, int32_t aCount); bool SupportsCollapseDirection(CollapseDirection aDirection); void EnsureOrient(); void SetPreferredSize(nsBoxLayoutState& aState, nsIFrame* aChildBox, nscoord aOnePixel, bool aIsHorizontal, nscoord* aSize); nsSplitterFrame* mOuter; bool mDidDrag; nscoord mDragStart; nscoord mCurrentPos; nsIFrame* mParentBox; bool mPressed; nsSplitterInfo* mChildInfosBefore; nsSplitterInfo* mChildInfosAfter; int32_t mChildInfosBeforeCount; int32_t mChildInfosAfterCount; State mState; nscoord mSplitterPos; bool mDragging; }; NS_IMPL_ISUPPORTS1(nsSplitterFrameInner, nsIDOMEventListener) nsSplitterFrameInner::ResizeType nsSplitterFrameInner::GetResizeBefore() { static nsIContent::AttrValuesArray strings[] = {&nsGkAtoms::farthest, &nsGkAtoms::flex, nullptr}; switch (mOuter->GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::resizebefore, strings, eCaseMatters)) { case 0: return Farthest; case 1: return Flex; } return Closest; } nsSplitterFrameInner::~nsSplitterFrameInner() { delete[] mChildInfosBefore; delete[] mChildInfosAfter; } nsSplitterFrameInner::ResizeType nsSplitterFrameInner::GetResizeAfter() { static nsIContent::AttrValuesArray strings[] = {&nsGkAtoms::farthest, &nsGkAtoms::flex, &nsGkAtoms::grow, nullptr}; switch (mOuter->GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::resizeafter, strings, eCaseMatters)) { case 0: return Farthest; case 1: return Flex; case 2: return Grow; } return Closest; } nsSplitterFrameInner::State nsSplitterFrameInner::GetState() { static nsIContent::AttrValuesArray strings[] = {&nsGkAtoms::dragging, &nsGkAtoms::collapsed, nullptr}; static nsIContent::AttrValuesArray strings_substate[] = {&nsGkAtoms::before, &nsGkAtoms::after, nullptr}; switch (mOuter->GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::state, strings, eCaseMatters)) { case 0: return Dragging; case 1: switch (mOuter->GetContent()->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::substate, strings_substate, eCaseMatters)) { case 0: return CollapsedBefore; case 1: return CollapsedAfter; default: if (SupportsCollapseDirection(After)) return CollapsedAfter; return CollapsedBefore; } } return Open; } // // NS_NewSplitterFrame // // Creates a new Toolbar frame and returns it // nsIFrame* NS_NewSplitterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext) { return new (aPresShell) nsSplitterFrame(aPresShell, aContext); } NS_IMPL_FRAMEARENA_HELPERS(nsSplitterFrame) nsSplitterFrame::nsSplitterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) : nsBoxFrame(aPresShell, aContext), mInner(0) { } void nsSplitterFrame::DestroyFrom(nsIFrame* aDestructRoot) { if (mInner) { mInner->RemoveListener(); mInner->Disconnect(); mInner->Release(); mInner = nullptr; } nsBoxFrame::DestroyFrom(aDestructRoot); } nsresult nsSplitterFrame::GetCursor(const nsPoint& aPoint, nsIFrame::Cursor& aCursor) { return nsBoxFrame::GetCursor(aPoint, aCursor); /* if (IsHorizontal()) aCursor = NS_STYLE_CURSOR_N_RESIZE; else aCursor = NS_STYLE_CURSOR_W_RESIZE; return NS_OK; */ } nsresult nsSplitterFrame::AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) { nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType); // if the alignment changed. Let the grippy know if (aAttribute == nsGkAtoms::align) { // tell the slider its attribute changed so it can // update itself nsIFrame* grippy = nullptr; nsScrollbarButtonFrame::GetChildWithTag(PresContext(), nsGkAtoms::grippy, this, grippy); if (grippy) grippy->AttributeChanged(aNameSpaceID, aAttribute, aModType); } else if (aAttribute == nsGkAtoms::state) { mInner->UpdateState(); } return rv; } /** * Initialize us. If we are in a box get our alignment so we know what direction we are */ void nsSplitterFrame::Init(nsIContent* aContent, nsIFrame* aParent, nsIFrame* aPrevInFlow) { MOZ_ASSERT(!mInner); mInner = new nsSplitterFrameInner(this); mInner->AddRef(); mInner->mChildInfosAfter = nullptr; mInner->mChildInfosBefore = nullptr; mInner->mState = nsSplitterFrameInner::Open; mInner->mDragging = false; // determine orientation of parent, and if vertical, set orient to vertical // on splitter content, then re-resolve style // XXXbz this is pretty messed up, since this can change whether we should // have a frame at all. This really needs a better solution. if (aParent && aParent->IsBoxFrame()) { if (!aParent->IsHorizontal()) { if (!nsContentUtils::HasNonEmptyAttr(aContent, kNameSpaceID_None, nsGkAtoms::orient)) { aContent->SetAttr(kNameSpaceID_None, nsGkAtoms::orient, NS_LITERAL_STRING("vertical"), false); nsStyleContext* parentStyleContext = StyleContext()->GetParent(); nsRefPtr newContext = PresContext()->StyleSet()-> ResolveStyleFor(aContent->AsElement(), parentStyleContext); SetStyleContextWithoutNotification(newContext); } } } nsBoxFrame::Init(aContent, aParent, aPrevInFlow); mInner->mState = nsSplitterFrameInner::Open; mInner->AddListener(PresContext()); mInner->mParentBox = nullptr; } NS_IMETHODIMP nsSplitterFrame::DoLayout(nsBoxLayoutState& aState) { if (GetStateBits() & NS_FRAME_FIRST_REFLOW) { mInner->mParentBox = GetParentBox(); mInner->UpdateState(); } return nsBoxFrame::DoLayout(aState); } void nsSplitterFrame::GetInitialOrientation(bool& aIsHorizontal) { nsIFrame* box = GetParentBox(); if (box) { aIsHorizontal = !box->IsHorizontal(); } else nsBoxFrame::GetInitialOrientation(aIsHorizontal); } NS_IMETHODIMP nsSplitterFrame::HandlePress(nsPresContext* aPresContext, WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) { return NS_OK; } NS_IMETHODIMP nsSplitterFrame::HandleMultiplePress(nsPresContext* aPresContext, WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus, bool aControlHeld) { return NS_OK; } NS_IMETHODIMP nsSplitterFrame::HandleDrag(nsPresContext* aPresContext, WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) { return NS_OK; } NS_IMETHODIMP nsSplitterFrame::HandleRelease(nsPresContext* aPresContext, WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) { return NS_OK; } void nsSplitterFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsBoxFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists); // if the mouse is captured always return us as the frame. if (mInner->mDragging) { // XXX It's probably better not to check visibility here, right? aLists.Outlines()->AppendNewToTop(new (aBuilder) nsDisplayEventReceiver(aBuilder, this)); return; } } nsresult nsSplitterFrame::HandleEvent(nsPresContext* aPresContext, WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) { NS_ENSURE_ARG_POINTER(aEventStatus); if (nsEventStatus_eConsumeNoDefault == *aEventStatus) { return NS_OK; } nsWeakFrame weakFrame(this); nsRefPtr kungFuDeathGrip(mInner); switch (aEvent->message) { case NS_MOUSE_MOVE: mInner->MouseDrag(aPresContext, aEvent); break; case NS_MOUSE_BUTTON_UP: if (aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) { mInner->MouseUp(aPresContext, aEvent); } break; } NS_ENSURE_STATE(weakFrame.IsAlive()); return nsBoxFrame::HandleEvent(aPresContext, aEvent, aEventStatus); } void nsSplitterFrameInner::MouseUp(nsPresContext* aPresContext, WidgetGUIEvent* aEvent) { if (mDragging && mOuter) { AdjustChildren(aPresContext); AddListener(aPresContext); nsIPresShell::SetCapturingContent(nullptr, 0); // XXXndeakin is this needed? mDragging = false; State newState = GetState(); // if the state is dragging then make it Open. if (newState == Dragging) mOuter->mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::state, EmptyString(), true); mPressed = false; // if we dragged then fire a command event. if (mDidDrag) { nsCOMPtr element = do_QueryInterface(mOuter->GetContent()); element->DoCommand(); } //printf("MouseUp\n"); } delete[] mChildInfosBefore; delete[] mChildInfosAfter; mChildInfosBefore = nullptr; mChildInfosAfter = nullptr; mChildInfosBeforeCount = 0; mChildInfosAfterCount = 0; } void nsSplitterFrameInner::MouseDrag(nsPresContext* aPresContext, WidgetGUIEvent* aEvent) { if (mDragging && mOuter) { //printf("Dragging\n"); bool isHorizontal = !mOuter->IsHorizontal(); // convert coord to pixels nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, mParentBox); nscoord pos = isHorizontal ? pt.x : pt.y; // mDragStart is in frame coordinates nscoord start = mDragStart; // take our current position and subtract the start location pos -= start; //printf("Diff=%d\n", pos); ResizeType resizeAfter = GetResizeAfter(); bool bounded; if (resizeAfter == nsSplitterFrameInner::Grow) bounded = false; else bounded = true; int i; for (i=0; i < mChildInfosBeforeCount; i++) mChildInfosBefore[i].changed = mChildInfosBefore[i].current; for (i=0; i < mChildInfosAfterCount; i++) mChildInfosAfter[i].changed = mChildInfosAfter[i].current; nscoord oldPos = pos; ResizeChildTo(aPresContext, pos, mChildInfosBefore, mChildInfosAfter, mChildInfosBeforeCount, mChildInfosAfterCount, bounded); State currentState = GetState(); bool supportsBefore = SupportsCollapseDirection(Before); bool supportsAfter = SupportsCollapseDirection(After); const bool isRTL = mOuter->StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL; bool pastEnd = oldPos > 0 && oldPos > pos; bool pastBegin = oldPos < 0 && oldPos < pos; if (isRTL) { // Swap the boundary checks in RTL mode bool tmp = pastEnd; pastEnd = pastBegin; pastBegin = tmp; } const bool isCollapsedBefore = pastBegin && supportsBefore; const bool isCollapsedAfter = pastEnd && supportsAfter; // if we are in a collapsed position if (isCollapsedBefore || isCollapsedAfter) { // and we are not collapsed then collapse if (currentState == Dragging) { if (pastEnd) { //printf("Collapse right\n"); if (supportsAfter) { nsCOMPtr outer = mOuter->mContent; outer->SetAttr(kNameSpaceID_None, nsGkAtoms::substate, NS_LITERAL_STRING("after"), true); outer->SetAttr(kNameSpaceID_None, nsGkAtoms::state, NS_LITERAL_STRING("collapsed"), true); } } else if (pastBegin) { //printf("Collapse left\n"); if (supportsBefore) { nsCOMPtr outer = mOuter->mContent; outer->SetAttr(kNameSpaceID_None, nsGkAtoms::substate, NS_LITERAL_STRING("before"), true); outer->SetAttr(kNameSpaceID_None, nsGkAtoms::state, NS_LITERAL_STRING("collapsed"), true); } } } } else { // if we are not in a collapsed position and we are not dragging make sure // we are dragging. if (currentState != Dragging) mOuter->mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::state, NS_LITERAL_STRING("dragging"), true); AdjustChildren(aPresContext); } mDidDrag = true; } } void nsSplitterFrameInner::AddListener(nsPresContext* aPresContext) { mOuter->GetContent()-> AddEventListener(NS_LITERAL_STRING("mouseup"), this, false, false); mOuter->GetContent()-> AddEventListener(NS_LITERAL_STRING("mousedown"), this, false, false); mOuter->GetContent()-> AddEventListener(NS_LITERAL_STRING("mousemove"), this, false, false); mOuter->GetContent()-> AddEventListener(NS_LITERAL_STRING("mouseout"), this, false, false); } void nsSplitterFrameInner::RemoveListener() { ENSURE_TRUE(mOuter); mOuter->GetContent()-> RemoveEventListener(NS_LITERAL_STRING("mouseup"), this, false); mOuter->GetContent()-> RemoveEventListener(NS_LITERAL_STRING("mousedown"), this, false); mOuter->GetContent()-> RemoveEventListener(NS_LITERAL_STRING("mousemove"), this, false); mOuter->GetContent()-> RemoveEventListener(NS_LITERAL_STRING("mouseout"), this, false); } nsresult nsSplitterFrameInner::HandleEvent(nsIDOMEvent* aEvent) { nsAutoString eventType; aEvent->GetType(eventType); if (eventType.EqualsLiteral("mouseup")) return MouseUp(aEvent); if (eventType.EqualsLiteral("mousedown")) return MouseDown(aEvent); if (eventType.EqualsLiteral("mousemove") || eventType.EqualsLiteral("mouseout")) return MouseMove(aEvent); NS_ABORT(); return NS_OK; } nsresult nsSplitterFrameInner::MouseUp(nsIDOMEvent* aMouseEvent) { NS_ENSURE_TRUE(mOuter, NS_OK); mPressed = false; nsIPresShell::SetCapturingContent(nullptr, 0); return NS_OK; } nsresult nsSplitterFrameInner::MouseDown(nsIDOMEvent* aMouseEvent) { NS_ENSURE_TRUE(mOuter, NS_OK); nsCOMPtr mouseEvent(do_QueryInterface(aMouseEvent)); if (!mouseEvent) return NS_OK; int16_t button = 0; mouseEvent->GetButton(&button); // only if left button if (button != 0) return NS_OK; if (mOuter->GetContent()-> AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled, nsGkAtoms::_true, eCaseMatters)) return NS_OK; mParentBox = mOuter->GetParentBox(); if (!mParentBox) return NS_OK; // get our index nsPresContext* outerPresContext = mOuter->PresContext(); const nsFrameList& siblingList(mParentBox->PrincipalChildList()); int32_t childIndex = siblingList.IndexOf(mOuter); // if it's 0 (or not found) then stop right here. // It might be not found if we're not in the parent's primary frame list. if (childIndex <= 0) return NS_OK; int32_t childCount = siblingList.GetLength(); // if it's the last index then we need to allow for resizeafter="grow" if (childIndex == childCount - 1 && GetResizeAfter() != Grow) return NS_OK; nsRefPtr rc = outerPresContext->PresShell()->GetReferenceRenderingContext(); NS_ENSURE_TRUE(rc, NS_ERROR_FAILURE); nsBoxLayoutState state(outerPresContext, rc); mCurrentPos = 0; mPressed = true; mDidDrag = false; EnsureOrient(); bool isHorizontal = !mOuter->IsHorizontal(); ResizeType resizeBefore = GetResizeBefore(); ResizeType resizeAfter = GetResizeAfter(); delete[] mChildInfosBefore; delete[] mChildInfosAfter; mChildInfosBefore = new nsSplitterInfo[childCount]; mChildInfosAfter = new nsSplitterInfo[childCount]; // create info 2 lists. One of the children before us and one after. int32_t count = 0; mChildInfosBeforeCount = 0; mChildInfosAfterCount = 0; nsIFrame* childBox = mParentBox->GetChildBox(); while (nullptr != childBox) { nsIContent* content = childBox->GetContent(); nsIDocument* doc = content->OwnerDoc(); int32_t dummy; nsIAtom* atom = doc->BindingManager()->ResolveTag(content, &dummy); // skip over any splitters if (atom != nsGkAtoms::splitter) { nsSize prefSize = childBox->GetPrefSize(state); nsSize minSize = childBox->GetMinSize(state); nsSize maxSize = nsBox::BoundsCheckMinMax(minSize, childBox->GetMaxSize(state)); prefSize = nsBox::BoundsCheck(minSize, prefSize, maxSize); mOuter->AddMargin(childBox, minSize); mOuter->AddMargin(childBox, prefSize); mOuter->AddMargin(childBox, maxSize); nscoord flex = childBox->GetFlex(state); nsMargin margin(0,0,0,0); childBox->GetMargin(margin); nsRect r(childBox->GetRect()); r.Inflate(margin); // We need to check for hidden attribute too, since treecols with // the hidden="true" attribute are not really hidden, just collapsed if (!content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::fixed, nsGkAtoms::_true, eCaseMatters) && !content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden, nsGkAtoms::_true, eCaseMatters)) { if (count < childIndex && (resizeBefore != Flex || flex > 0)) { mChildInfosBefore[mChildInfosBeforeCount].childElem = content; mChildInfosBefore[mChildInfosBeforeCount].min = isHorizontal ? minSize.width : minSize.height; mChildInfosBefore[mChildInfosBeforeCount].max = isHorizontal ? maxSize.width : maxSize.height; mChildInfosBefore[mChildInfosBeforeCount].current = isHorizontal ? r.width : r.height; mChildInfosBefore[mChildInfosBeforeCount].flex = flex; mChildInfosBefore[mChildInfosBeforeCount].index = count; mChildInfosBefore[mChildInfosBeforeCount].changed = mChildInfosBefore[mChildInfosBeforeCount].current; mChildInfosBeforeCount++; } else if (count > childIndex && (resizeAfter != Flex || flex > 0)) { mChildInfosAfter[mChildInfosAfterCount].childElem = content; mChildInfosAfter[mChildInfosAfterCount].min = isHorizontal ? minSize.width : minSize.height; mChildInfosAfter[mChildInfosAfterCount].max = isHorizontal ? maxSize.width : maxSize.height; mChildInfosAfter[mChildInfosAfterCount].current = isHorizontal ? r.width : r.height; mChildInfosAfter[mChildInfosAfterCount].flex = flex; mChildInfosAfter[mChildInfosAfterCount].index = count; mChildInfosAfter[mChildInfosAfterCount].changed = mChildInfosAfter[mChildInfosAfterCount].current; mChildInfosAfterCount++; } } } childBox = childBox->GetNextBox(); count++; } if (!mParentBox->IsNormalDirection()) { // The before array is really the after array, and the order needs to be reversed. // First reverse both arrays. Reverse(mChildInfosBefore, mChildInfosBeforeCount); Reverse(mChildInfosAfter, mChildInfosAfterCount); // Now swap the two arrays. nscoord newAfterCount = mChildInfosBeforeCount; mChildInfosBeforeCount = mChildInfosAfterCount; mChildInfosAfterCount = newAfterCount; nsSplitterInfo* temp = mChildInfosAfter; mChildInfosAfter = mChildInfosBefore; mChildInfosBefore = temp; } // if resizebefore is not Farthest, reverse the list because the first child // in the list is the farthest, and we want the first child to be the closest. if (resizeBefore != Farthest) Reverse(mChildInfosBefore, mChildInfosBeforeCount); // if the resizeafter is the Farthest we must reverse the list because the first child in the list // is the closest we want the first child to be the Farthest. if (resizeAfter == Farthest) Reverse(mChildInfosAfter, mChildInfosAfterCount); // grow only applys to the children after. If grow is set then no space should be taken out of any children after // us. To do this we just set the size of that list to be 0. if (resizeAfter == Grow) mChildInfosAfterCount = 0; int32_t c; nsPoint pt = nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(mouseEvent, mParentBox); if (isHorizontal) { c = pt.x; mSplitterPos = mOuter->mRect.x; } else { c = pt.y; mSplitterPos = mOuter->mRect.y; } mDragStart = c; //printf("Pressed mDragStart=%d\n",mDragStart); nsIPresShell::SetCapturingContent(mOuter->GetContent(), CAPTURE_IGNOREALLOWED); return NS_OK; } nsresult nsSplitterFrameInner::MouseMove(nsIDOMEvent* aMouseEvent) { NS_ENSURE_TRUE(mOuter, NS_OK); if (!mPressed) return NS_OK; if (mDragging) return NS_OK; nsCOMPtr kungfuDeathGrip(this); mOuter->mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::state, NS_LITERAL_STRING("dragging"), true); RemoveListener(); mDragging = true; return NS_OK; } void nsSplitterFrameInner::Reverse(nsSplitterInfo*& aChildInfos, int32_t aCount) { nsSplitterInfo* infos = new nsSplitterInfo[aCount]; for (int i=0; i < aCount; i++) infos[i] = aChildInfos[aCount - 1 - i]; delete[] aChildInfos; aChildInfos = infos; } bool nsSplitterFrameInner::SupportsCollapseDirection ( nsSplitterFrameInner::CollapseDirection aDirection ) { static nsIContent::AttrValuesArray strings[] = {&nsGkAtoms::before, &nsGkAtoms::after, &nsGkAtoms::both, nullptr}; switch (mOuter->mContent->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::collapse, strings, eCaseMatters)) { case 0: return (aDirection == Before); case 1: return (aDirection == After); case 2: return true; } return false; } void nsSplitterFrameInner::UpdateState() { // State Transitions: // Open -> Dragging // Open -> CollapsedBefore // Open -> CollapsedAfter // CollapsedBefore -> Open // CollapsedBefore -> Dragging // CollapsedAfter -> Open // CollapsedAfter -> Dragging // Dragging -> Open // Dragging -> CollapsedBefore (auto collapse) // Dragging -> CollapsedAfter (auto collapse) State newState = GetState(); if (newState == mState) { // No change. return; } if ((SupportsCollapseDirection(Before) || SupportsCollapseDirection(After)) && mOuter->GetParent()->IsBoxFrame()) { // Find the splitter's immediate sibling. nsIFrame* splitterSibling; if (newState == CollapsedBefore || mState == CollapsedBefore) { splitterSibling = mOuter->GetPrevSibling(); } else { splitterSibling = mOuter->GetNextSibling(); } if (splitterSibling) { nsCOMPtr sibling = splitterSibling->GetContent(); if (sibling) { if (mState == CollapsedBefore || mState == CollapsedAfter) { // CollapsedBefore -> Open // CollapsedBefore -> Dragging // CollapsedAfter -> Open // CollapsedAfter -> Dragging nsContentUtils::AddScriptRunner( new nsUnsetAttrRunnable(sibling, nsGkAtoms::collapsed)); } else if ((mState == Open || mState == Dragging) && (newState == CollapsedBefore || newState == CollapsedAfter)) { // Open -> CollapsedBefore / CollapsedAfter // Dragging -> CollapsedBefore / CollapsedAfter nsContentUtils::AddScriptRunner( new nsSetAttrRunnable(sibling, nsGkAtoms::collapsed, NS_LITERAL_STRING("true"))); } } } } mState = newState; } void nsSplitterFrameInner::EnsureOrient() { bool isHorizontal = !(mParentBox->GetStateBits() & NS_STATE_IS_HORIZONTAL); if (isHorizontal) mOuter->mState |= NS_STATE_IS_HORIZONTAL; else mOuter->mState &= ~NS_STATE_IS_HORIZONTAL; } void nsSplitterFrameInner::AdjustChildren(nsPresContext* aPresContext) { EnsureOrient(); bool isHorizontal = !mOuter->IsHorizontal(); AdjustChildren(aPresContext, mChildInfosBefore, mChildInfosBeforeCount, isHorizontal); AdjustChildren(aPresContext, mChildInfosAfter, mChildInfosAfterCount, isHorizontal); } static nsIFrame* GetChildBoxForContent(nsIFrame* aParentBox, nsIContent* aContent) { nsIFrame* childBox = aParentBox->GetChildBox(); while (nullptr != childBox) { if (childBox->GetContent() == aContent) { return childBox; } childBox = childBox->GetNextBox(); } return nullptr; } void nsSplitterFrameInner::AdjustChildren(nsPresContext* aPresContext, nsSplitterInfo* aChildInfos, int32_t aCount, bool aIsHorizontal) { ///printf("------- AdjustChildren------\n"); nsBoxLayoutState state(aPresContext); nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1); // first set all the widths. nsIFrame* child = mOuter->GetChildBox(); while(child) { SetPreferredSize(state, child, onePixel, aIsHorizontal, nullptr); child = child->GetNextBox(); } // now set our changed widths. for (int i=0; i < aCount; i++) { nscoord pref = aChildInfos[i].changed; nsIFrame* childBox = GetChildBoxForContent(mParentBox, aChildInfos[i].childElem); if (childBox) { SetPreferredSize(state, childBox, onePixel, aIsHorizontal, &pref); } } } void nsSplitterFrameInner::SetPreferredSize(nsBoxLayoutState& aState, nsIFrame* aChildBox, nscoord aOnePixel, bool aIsHorizontal, nscoord* aSize) { nsRect rect(aChildBox->GetRect()); nscoord pref = 0; if (!aSize) { if (aIsHorizontal) pref = rect.width; else pref = rect.height; } else { pref = *aSize; } nsMargin margin(0,0,0,0); aChildBox->GetMargin(margin); nsCOMPtr attribute; if (aIsHorizontal) { pref -= (margin.left + margin.right); attribute = nsGkAtoms::width; } else { pref -= (margin.top + margin.bottom); attribute = nsGkAtoms::height; } nsIContent* content = aChildBox->GetContent(); // set its preferred size. nsAutoString prefValue; prefValue.AppendInt(pref/aOnePixel); if (content->AttrValueIs(kNameSpaceID_None, attribute, prefValue, eCaseMatters)) return; nsWeakFrame weakBox(aChildBox); content->SetAttr(kNameSpaceID_None, attribute, prefValue, true); ENSURE_TRUE(weakBox.IsAlive()); aState.PresShell()->FrameNeedsReflow(aChildBox, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); } void nsSplitterFrameInner::AddRemoveSpace(nscoord aDiff, nsSplitterInfo* aChildInfos, int32_t aCount, int32_t& aSpaceLeft) { aSpaceLeft = 0; for (int i=0; i < aCount; i++) { nscoord min = aChildInfos[i].min; nscoord max = aChildInfos[i].max; nscoord& c = aChildInfos[i].changed; // figure our how much space to add or remove if (c + aDiff < min) { aDiff += (c - min); c = min; } else if (c + aDiff > max) { aDiff -= (max - c); c = max; } else { c += aDiff; aDiff = 0; } // there is not space left? We are done if (aDiff == 0) break; } aSpaceLeft = aDiff; } /** * Ok if we want to resize a child we will know the actual size in pixels we want it to be. * This is not the preferred size. But they only way we can change a child is my manipulating its * preferred size. So give the actual pixel size this return method will return figure out the preferred * size and set it. */ void nsSplitterFrameInner::ResizeChildTo(nsPresContext* aPresContext, nscoord& aDiff, nsSplitterInfo* aChildrenBeforeInfos, nsSplitterInfo* aChildrenAfterInfos, int32_t aChildrenBeforeCount, int32_t aChildrenAfterCount, bool aBounded) { nscoord spaceLeft; AddRemoveSpace(aDiff, aChildrenBeforeInfos,aChildrenBeforeCount,spaceLeft); // if there is any space left over remove it from the dif we were originally given aDiff -= spaceLeft; AddRemoveSpace(-aDiff, aChildrenAfterInfos,aChildrenAfterCount,spaceLeft); if (spaceLeft != 0) { if (aBounded) { aDiff += spaceLeft; AddRemoveSpace(spaceLeft, aChildrenBeforeInfos,aChildrenBeforeCount,spaceLeft); } else { spaceLeft = 0; } } }