/* -*- 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/. */ #include "nsComboboxControlFrame.h" #include "gfxUtils.h" #include "mozilla/gfx/2D.h" #include "mozilla/gfx/PathHelpers.h" #include "nsCOMPtr.h" #include "nsFocusManager.h" #include "nsFormControlFrame.h" #include "nsGkAtoms.h" #include "nsCSSAnonBoxes.h" #include "nsHTMLParts.h" #include "nsIFormControl.h" #include "nsNameSpaceManager.h" #include "nsIListControlFrame.h" #include "nsPIDOMWindow.h" #include "nsIPresShell.h" #include "nsPresState.h" #include "nsContentList.h" #include "nsView.h" #include "nsViewManager.h" #include "nsIDOMEventListener.h" #include "nsIDOMNode.h" #include "nsISelectControlFrame.h" #include "nsContentUtils.h" #include "nsIDocument.h" #include "nsIScrollableFrame.h" #include "nsListControlFrame.h" #include "mozilla/StyleSetHandle.h" #include "mozilla/StyleSetHandleInlines.h" #include "nsNodeInfoManager.h" #include "nsContentCreatorFunctions.h" #include "nsLayoutUtils.h" #include "nsDisplayList.h" #include "nsITheme.h" #include "nsThemeConstants.h" #include "nsRenderingContext.h" #include "mozilla/Likely.h" #include <algorithm> #include "nsTextNode.h" #include "mozilla/AsyncEventDispatcher.h" #include "mozilla/EventStates.h" #include "mozilla/LookAndFeel.h" #include "mozilla/MouseEvents.h" #include "mozilla/Unused.h" #include "gfx2DGlue.h" #ifdef XP_WIN #define COMBOBOX_ROLLUP_CONSUME_EVENT 0 #else #define COMBOBOX_ROLLUP_CONSUME_EVENT 1 #endif using namespace mozilla; using namespace mozilla::gfx; NS_IMETHODIMP nsComboboxControlFrame::RedisplayTextEvent::Run() { if (mControlFrame) mControlFrame->HandleRedisplayTextEvent(); return NS_OK; } class nsPresState; #define FIX_FOR_BUG_53259 // Drop down list event management. // The combo box uses the following strategy for managing the drop-down list. // If the combo box or its arrow button is clicked on the drop-down list is displayed // If mouse exits the combo box with the drop-down list displayed the drop-down list // is asked to capture events // The drop-down list will capture all events including mouse down and up and will always // return with ListWasSelected method call regardless of whether an item in the list was // actually selected. // The ListWasSelected code will turn off mouse-capture for the drop-down list. // The drop-down list does not explicitly set capture when it is in the drop-down mode. /** * Helper class that listens to the combo boxes button. If the button is pressed the * combo box is toggled to open or close. this is used by Accessibility which presses * that button Programmatically. */ class nsComboButtonListener : public nsIDOMEventListener { private: virtual ~nsComboButtonListener() {} public: NS_DECL_ISUPPORTS NS_IMETHOD HandleEvent(nsIDOMEvent*) override { mComboBox->ShowDropDown(!mComboBox->IsDroppedDown()); return NS_OK; } explicit nsComboButtonListener(nsComboboxControlFrame* aCombobox) { mComboBox = aCombobox; } nsComboboxControlFrame* mComboBox; }; NS_IMPL_ISUPPORTS(nsComboButtonListener, nsIDOMEventListener) // static class data member for Bug 32920 nsComboboxControlFrame* nsComboboxControlFrame::sFocused = nullptr; nsContainerFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, nsFrameState aStateFlags) { nsComboboxControlFrame* it = new (aPresShell) nsComboboxControlFrame(aContext); if (it) { // set the state flags (if any are provided) it->AddStateBits(aStateFlags); } return it; } NS_IMPL_FRAMEARENA_HELPERS(nsComboboxControlFrame) //----------------------------------------------------------- // Reflow Debugging Macros // These let us "see" how many reflow counts are happening //----------------------------------------------------------- #ifdef DO_REFLOW_COUNTER #define MAX_REFLOW_CNT 1024 static int32_t gTotalReqs = 0;; static int32_t gTotalReflows = 0;; static int32_t gReflowControlCntRQ[MAX_REFLOW_CNT]; static int32_t gReflowControlCnt[MAX_REFLOW_CNT]; static int32_t gReflowInx = -1; #define REFLOW_COUNTER() \ if (mReflowId > -1) \ gReflowControlCnt[mReflowId]++; #define REFLOW_COUNTER_REQUEST() \ if (mReflowId > -1) \ gReflowControlCntRQ[mReflowId]++; #define REFLOW_COUNTER_DUMP(__desc) \ if (mReflowId > -1) {\ gTotalReqs += gReflowControlCntRQ[mReflowId];\ gTotalReflows += gReflowControlCnt[mReflowId];\ printf("** Id:%5d %s RF: %d RQ: %d %d/%d %5.2f\n", \ mReflowId, (__desc), \ gReflowControlCnt[mReflowId], \ gReflowControlCntRQ[mReflowId],\ gTotalReflows, gTotalReqs, float(gTotalReflows)/float(gTotalReqs)*100.0f);\ } #define REFLOW_COUNTER_INIT() \ if (gReflowInx < MAX_REFLOW_CNT) { \ gReflowInx++; \ mReflowId = gReflowInx; \ gReflowControlCnt[mReflowId] = 0; \ gReflowControlCntRQ[mReflowId] = 0; \ } else { \ mReflowId = -1; \ } // reflow messages #define REFLOW_DEBUG_MSG(_msg1) printf((_msg1)) #define REFLOW_DEBUG_MSG2(_msg1, _msg2) printf((_msg1), (_msg2)) #define REFLOW_DEBUG_MSG3(_msg1, _msg2, _msg3) printf((_msg1), (_msg2), (_msg3)) #define REFLOW_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4) printf((_msg1), (_msg2), (_msg3), (_msg4)) #else //------------- #define REFLOW_COUNTER_REQUEST() #define REFLOW_COUNTER() #define REFLOW_COUNTER_DUMP(__desc) #define REFLOW_COUNTER_INIT() #define REFLOW_DEBUG_MSG(_msg) #define REFLOW_DEBUG_MSG2(_msg1, _msg2) #define REFLOW_DEBUG_MSG3(_msg1, _msg2, _msg3) #define REFLOW_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4) #endif //------------------------------------------ // This is for being VERY noisy //------------------------------------------ #ifdef DO_VERY_NOISY #define REFLOW_NOISY_MSG(_msg1) printf((_msg1)) #define REFLOW_NOISY_MSG2(_msg1, _msg2) printf((_msg1), (_msg2)) #define REFLOW_NOISY_MSG3(_msg1, _msg2, _msg3) printf((_msg1), (_msg2), (_msg3)) #define REFLOW_NOISY_MSG4(_msg1, _msg2, _msg3, _msg4) printf((_msg1), (_msg2), (_msg3), (_msg4)) #else #define REFLOW_NOISY_MSG(_msg) #define REFLOW_NOISY_MSG2(_msg1, _msg2) #define REFLOW_NOISY_MSG3(_msg1, _msg2, _msg3) #define REFLOW_NOISY_MSG4(_msg1, _msg2, _msg3, _msg4) #endif //------------------------------------------ // Displays value in pixels or twips //------------------------------------------ #ifdef DO_PIXELS #define PX(__v) __v / 15 #else #define PX(__v) __v #endif //------------------------------------------------------ //-- Done with macros //------------------------------------------------------ nsComboboxControlFrame::nsComboboxControlFrame(nsStyleContext* aContext) : nsBlockFrame(aContext) , mDisplayFrame(nullptr) , mButtonFrame(nullptr) , mDropdownFrame(nullptr) , mListControlFrame(nullptr) , mDisplayISize(0) , mRecentSelectedIndex(NS_SKIP_NOTIFY_INDEX) , mDisplayedIndex(-1) , mLastDropDownBeforeScreenBCoord(nscoord_MIN) , mLastDropDownAfterScreenBCoord(nscoord_MIN) , mDroppedDown(false) , mInRedisplayText(false) , mDelayedShowDropDown(false) , mIsOpenInParentProcess(false) { REFLOW_COUNTER_INIT() } //-------------------------------------------------------------- nsComboboxControlFrame::~nsComboboxControlFrame() { REFLOW_COUNTER_DUMP("nsCCF"); } //-------------------------------------------------------------- NS_QUERYFRAME_HEAD(nsComboboxControlFrame) NS_QUERYFRAME_ENTRY(nsIComboboxControlFrame) NS_QUERYFRAME_ENTRY(nsIFormControlFrame) NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator) NS_QUERYFRAME_ENTRY(nsISelectControlFrame) NS_QUERYFRAME_ENTRY(nsIStatefulFrame) NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame) #ifdef ACCESSIBILITY a11y::AccType nsComboboxControlFrame::AccessibleType() { return a11y::eHTMLComboboxType; } #endif void nsComboboxControlFrame::SetFocus(bool aOn, bool aRepaint) { nsWeakFrame weakFrame(this); if (aOn) { nsListControlFrame::ComboboxFocusSet(); sFocused = this; if (mDelayedShowDropDown) { ShowDropDown(true); // might destroy us if (!weakFrame.IsAlive()) { return; } } } else { sFocused = nullptr; mDelayedShowDropDown = false; if (mDroppedDown) { mListControlFrame->ComboboxFinish(mDisplayedIndex); // might destroy us if (!weakFrame.IsAlive()) { return; } } // May delete |this|. mListControlFrame->FireOnInputAndOnChange(); } if (!weakFrame.IsAlive()) { return; } // This is needed on a temporary basis. It causes the focus // rect to be drawn. This is much faster than ReResolvingStyle // Bug 32920 InvalidateFrame(); } void nsComboboxControlFrame::ShowPopup(bool aShowPopup) { nsView* view = mDropdownFrame->GetView(); nsViewManager* viewManager = view->GetViewManager(); if (aShowPopup) { nsRect rect = mDropdownFrame->GetRect(); rect.x = rect.y = 0; viewManager->ResizeView(view, rect); viewManager->SetViewVisibility(view, nsViewVisibility_kShow); } else { viewManager->SetViewVisibility(view, nsViewVisibility_kHide); nsRect emptyRect(0, 0, 0, 0); viewManager->ResizeView(view, emptyRect); } // fire a popup dom event if it is safe to do so nsCOMPtr<nsIPresShell> shell = PresContext()->GetPresShell(); if (shell && nsContentUtils::IsSafeToRunScript()) { nsEventStatus status = nsEventStatus_eIgnore; WidgetMouseEvent event(true, aShowPopup ? eXULPopupShowing : eXULPopupHiding, nullptr, WidgetMouseEvent::eReal); shell->HandleDOMEventWithTarget(mContent, &event, &status); } } bool nsComboboxControlFrame::ShowList(bool aShowList) { nsView* view = mDropdownFrame->GetView(); if (aShowList) { NS_ASSERTION(!view->HasWidget(), "We shouldn't have a widget before we need to display the popup"); // Create the widget for the drop-down list view->GetViewManager()->SetViewFloating(view, true); nsWidgetInitData widgetData; widgetData.mWindowType = eWindowType_popup; widgetData.mBorderStyle = eBorderStyle_default; view->CreateWidgetForPopup(&widgetData); } else { nsIWidget* widget = view->GetWidget(); if (widget) { // We must do this before ShowPopup in case it destroys us (bug 813442). widget->CaptureRollupEvents(this, false); } } nsWeakFrame weakFrame(this); ShowPopup(aShowList); // might destroy us if (!weakFrame.IsAlive()) { return false; } mDroppedDown = aShowList; nsIWidget* widget = view->GetWidget(); if (mDroppedDown) { // The listcontrol frame will call back to the nsComboboxControlFrame's // ListWasSelected which will stop the capture. mListControlFrame->AboutToDropDown(); mListControlFrame->CaptureMouseEvents(true); if (widget) { widget->CaptureRollupEvents(this, true); } } else { if (widget) { view->DestroyWidget(); } } return weakFrame.IsAlive(); } class nsResizeDropdownAtFinalPosition final : public nsIReflowCallback, public Runnable { public: explicit nsResizeDropdownAtFinalPosition(nsComboboxControlFrame* aFrame) : mFrame(aFrame) { MOZ_COUNT_CTOR(nsResizeDropdownAtFinalPosition); } protected: ~nsResizeDropdownAtFinalPosition() { MOZ_COUNT_DTOR(nsResizeDropdownAtFinalPosition); } public: virtual bool ReflowFinished() override { Run(); NS_RELEASE_THIS(); return false; } virtual void ReflowCallbackCanceled() override { NS_RELEASE_THIS(); } NS_IMETHOD Run() override { if (mFrame.IsAlive()) { static_cast<nsComboboxControlFrame*>(mFrame.GetFrame())-> AbsolutelyPositionDropDown(); } return NS_OK; } nsWeakFrame mFrame; }; void nsComboboxControlFrame::ReflowDropdown(nsPresContext* aPresContext, const ReflowInput& aReflowInput) { // All we want out of it later on, really, is the block size of a row, so we // don't even need to cache mDropdownFrame's ascent or anything. If we don't // need to reflow it, just bail out here. if (!aReflowInput.ShouldReflowAllKids() && !NS_SUBTREE_DIRTY(mDropdownFrame)) { return; } // XXXbz this will, for small-block-size dropdowns, have extra space // on the appropriate edge for the scrollbar we don't show... but // that's the best we can do here for now. WritingMode wm = mDropdownFrame->GetWritingMode(); LogicalSize availSize = aReflowInput.AvailableSize(wm); availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE; ReflowInput kidReflowInput(aPresContext, aReflowInput, mDropdownFrame, availSize); // If the dropdown's intrinsic inline size is narrower than our // specified inline size, then expand it out. We want our border-box // inline size to end up the same as the dropdown's so account for // both sets of mComputedBorderPadding. nscoord forcedISize = aReflowInput.ComputedISize() + aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm) - kidReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm); kidReflowInput.SetComputedISize(std::max(kidReflowInput.ComputedISize(), forcedISize)); // ensure we start off hidden if (!mDroppedDown && GetStateBits() & NS_FRAME_FIRST_REFLOW) { nsView* view = mDropdownFrame->GetView(); nsViewManager* viewManager = view->GetViewManager(); viewManager->SetViewVisibility(view, nsViewVisibility_kHide); nsRect emptyRect(0, 0, 0, 0); viewManager->ResizeView(view, emptyRect); } // Allow the child to move/size/change-visibility its view if it's currently // dropped down int32_t flags = mDroppedDown ? 0 : NS_FRAME_NO_MOVE_FRAME | NS_FRAME_NO_VISIBILITY | NS_FRAME_NO_SIZE_VIEW; //XXX Can this be different from the dropdown's writing mode? // That would be odd! // Note that we don't need to pass the true frame position or container size // to ReflowChild or FinishReflowChild here; it will be positioned as needed // by AbsolutelyPositionDropDown(). WritingMode outerWM = GetWritingMode(); const nsSize dummyContainerSize; ReflowOutput desiredSize(aReflowInput); nsReflowStatus ignoredStatus; ReflowChild(mDropdownFrame, aPresContext, desiredSize, kidReflowInput, outerWM, LogicalPoint(outerWM), dummyContainerSize, flags, ignoredStatus); // Set the child's width and height to its desired size FinishReflowChild(mDropdownFrame, aPresContext, desiredSize, &kidReflowInput, outerWM, LogicalPoint(outerWM), dummyContainerSize, flags); } nsPoint nsComboboxControlFrame::GetCSSTransformTranslation() { nsIFrame* frame = this; bool is3DTransform = false; Matrix transform; while (frame) { nsIFrame* parent; Matrix4x4 ctm = frame->GetTransformMatrix(nullptr, &parent); Matrix matrix; if (ctm.Is2D(&matrix)) { transform = transform * matrix; } else { is3DTransform = true; break; } frame = parent; } nsPoint translation; if (!is3DTransform && !transform.HasNonTranslation()) { nsPresContext* pc = PresContext(); // To get the translation introduced only by transforms we subtract the // regular non-transform translation. nsRootPresContext* rootPC = pc->GetRootPresContext(); if (rootPC) { int32_t apd = pc->AppUnitsPerDevPixel(); translation.x = NSFloatPixelsToAppUnits(transform._31, apd); translation.y = NSFloatPixelsToAppUnits(transform._32, apd); translation -= GetOffsetToCrossDoc(rootPC->PresShell()->GetRootFrame()); } } return translation; } class nsAsyncRollup : public Runnable { public: explicit nsAsyncRollup(nsComboboxControlFrame* aFrame) : mFrame(aFrame) {} NS_IMETHOD Run() override { if (mFrame.IsAlive()) { static_cast<nsComboboxControlFrame*>(mFrame.GetFrame()) ->RollupFromList(); } return NS_OK; } nsWeakFrame mFrame; }; class nsAsyncResize : public Runnable { public: explicit nsAsyncResize(nsComboboxControlFrame* aFrame) : mFrame(aFrame) {} NS_IMETHOD Run() override { if (mFrame.IsAlive()) { nsComboboxControlFrame* combo = static_cast<nsComboboxControlFrame*>(mFrame.GetFrame()); static_cast<nsListControlFrame*>(combo->mDropdownFrame)-> SetSuppressScrollbarUpdate(true); nsCOMPtr<nsIPresShell> shell = mFrame->PresContext()->PresShell(); shell->FrameNeedsReflow(combo->mDropdownFrame, nsIPresShell::eResize, NS_FRAME_IS_DIRTY); shell->FlushPendingNotifications(Flush_Layout); if (mFrame.IsAlive()) { combo = static_cast<nsComboboxControlFrame*>(mFrame.GetFrame()); static_cast<nsListControlFrame*>(combo->mDropdownFrame)-> SetSuppressScrollbarUpdate(false); if (combo->mDelayedShowDropDown) { combo->ShowDropDown(true); } } } return NS_OK; } nsWeakFrame mFrame; }; void nsComboboxControlFrame::GetAvailableDropdownSpace(WritingMode aWM, nscoord* aBefore, nscoord* aAfter, LogicalPoint* aTranslation) { MOZ_ASSERT(!XRE_IsContentProcess()); // Note: At first glance, it appears that you could simply get the // absolute bounding box for the dropdown list by first getting its // view, then getting the view's nsIWidget, then asking the nsIWidget // for its AbsoluteBounds. // The problem with this approach, is that the dropdown list's bcoord // location can change based on whether the dropdown is placed after // or before the display frame. The approach taken here is to get the // absolute position of the display frame and use its location to // determine if the dropdown will go offscreen. // Normal frame geometry (eg GetOffsetTo, mRect) doesn't include transforms. // In the special case that our transform is only a 2D translation we // introduce this hack so that the dropdown will show up in the right place. // Use null container size when converting a vector from logical to physical. const nsSize nullContainerSize; *aTranslation = LogicalPoint(aWM, GetCSSTransformTranslation(), nullContainerSize); *aBefore = 0; *aAfter = 0; nsRect screen = nsFormControlFrame::GetUsableScreenRect(PresContext()); nsSize containerSize = screen.Size(); LogicalRect logicalScreen(aWM, screen, containerSize); if (mLastDropDownAfterScreenBCoord == nscoord_MIN) { LogicalRect thisScreenRect(aWM, GetScreenRectInAppUnits(), containerSize); mLastDropDownAfterScreenBCoord = thisScreenRect.BEnd(aWM) + aTranslation->B(aWM); mLastDropDownBeforeScreenBCoord = thisScreenRect.BStart(aWM) + aTranslation->B(aWM); } nscoord minBCoord; nsPresContext* pc = PresContext()->GetToplevelContentDocumentPresContext(); nsIFrame* root = pc ? pc->PresShell()->GetRootFrame() : nullptr; if (root) { minBCoord = LogicalRect(aWM, root->GetScreenRectInAppUnits(), containerSize).BStart(aWM); if (mLastDropDownAfterScreenBCoord < minBCoord) { // Don't allow the drop-down to be placed before the content area. return; } } else { minBCoord = logicalScreen.BStart(aWM); } nscoord after = logicalScreen.BEnd(aWM) - mLastDropDownAfterScreenBCoord; nscoord before = mLastDropDownBeforeScreenBCoord - minBCoord; // If the difference between the space before and after is less // than a row-block-size, then we favor the space after. if (before >= after) { nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame); nscoord rowBSize = lcf->GetBSizeOfARow(); if (before < after + rowBSize) { before -= rowBSize; } } *aAfter = after; *aBefore = before; } nsComboboxControlFrame::DropDownPositionState nsComboboxControlFrame::AbsolutelyPositionDropDown() { if (XRE_IsContentProcess()) { return eDropDownPositionSuppressed; } WritingMode wm = GetWritingMode(); LogicalPoint translation(wm); nscoord before, after; mLastDropDownAfterScreenBCoord = nscoord_MIN; GetAvailableDropdownSpace(wm, &before, &after, &translation); if (before <= 0 && after <= 0) { if (IsDroppedDown()) { // Hide the view immediately to minimize flicker. nsView* view = mDropdownFrame->GetView(); view->GetViewManager()->SetViewVisibility(view, nsViewVisibility_kHide); NS_DispatchToCurrentThread(new nsAsyncRollup(this)); } return eDropDownPositionSuppressed; } LogicalSize dropdownSize = mDropdownFrame->GetLogicalSize(wm); nscoord bSize = std::max(before, after); nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame); if (bSize < dropdownSize.BSize(wm)) { if (lcf->GetNumDisplayRows() > 1) { // The drop-down doesn't fit and currently shows more than 1 row - // schedule a resize to show fewer rows. NS_DispatchToCurrentThread(new nsAsyncResize(this)); return eDropDownPositionPendingResize; } } else if (bSize > (dropdownSize.BSize(wm) + lcf->GetBSizeOfARow() * 1.5) && lcf->GetDropdownCanGrow()) { // The drop-down fits but there is room for at least 1.5 more rows - // schedule a resize to show more rows if it has more rows to show. // (1.5 rows for good measure to avoid any rounding issues that would // lead to a loop of reflow requests) NS_DispatchToCurrentThread(new nsAsyncResize(this)); return eDropDownPositionPendingResize; } // Position the drop-down after if there is room, otherwise place it before // if there is room. If there is no room for it on either side then place // it after (to avoid overlapping UI like the URL bar). bool b = dropdownSize.BSize(wm)<= after || dropdownSize.BSize(wm) > before; LogicalPoint dropdownPosition(wm, 0, b ? BSize(wm) : -dropdownSize.BSize(wm)); // Don't position the view unless the position changed since it might cause // a call to NotifyGeometryChange() and an infinite loop here. nsSize containerSize = GetSize(); const LogicalPoint currentPos = mDropdownFrame->GetLogicalPosition(containerSize); const LogicalPoint newPos = dropdownPosition + translation; if (currentPos != newPos) { mDropdownFrame->SetPosition(wm, newPos, containerSize); nsContainerFrame::PositionFrameView(mDropdownFrame); } return eDropDownPositionFinal; } void nsComboboxControlFrame::NotifyGeometryChange() { if (XRE_IsContentProcess()) { return; } // We don't need to resize if we're not dropped down since ShowDropDown // does that, or if we're dirty then the reflow callback does it, // or if we have a delayed ShowDropDown pending. if (IsDroppedDown() && !(GetStateBits() & NS_FRAME_IS_DIRTY) && !mDelayedShowDropDown) { // Async because we're likely in a middle of a scroll here so // frame/view positions are in flux. RefPtr<nsResizeDropdownAtFinalPosition> resize = new nsResizeDropdownAtFinalPosition(this); NS_DispatchToCurrentThread(resize); } } //---------------------------------------------------------- // //---------------------------------------------------------- #ifdef DO_REFLOW_DEBUG static int myCounter = 0; static void printSize(char * aDesc, nscoord aSize) { printf(" %s: ", aDesc); if (aSize == NS_UNCONSTRAINEDSIZE) { printf("UC"); } else { printf("%d", PX(aSize)); } } #endif //------------------------------------------------------------------- //-- Main Reflow for the Combobox //------------------------------------------------------------------- nscoord nsComboboxControlFrame::GetIntrinsicISize(nsRenderingContext* aRenderingContext, nsLayoutUtils::IntrinsicISizeType aType) { // get the scrollbar width, we'll use this later nscoord scrollbarWidth = 0; nsPresContext* presContext = PresContext(); if (mListControlFrame) { nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame); NS_ASSERTION(scrollable, "List must be a scrollable frame"); scrollbarWidth = scrollable->GetNondisappearingScrollbarWidth( presContext, aRenderingContext, GetWritingMode()); } nscoord displayISize = 0; if (MOZ_LIKELY(mDisplayFrame)) { displayISize = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, mDisplayFrame, aType); } if (mDropdownFrame) { nscoord dropdownContentISize; bool isUsingOverlayScrollbars = LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0; if (aType == nsLayoutUtils::MIN_ISIZE) { dropdownContentISize = mDropdownFrame->GetMinISize(aRenderingContext); if (isUsingOverlayScrollbars) { dropdownContentISize += scrollbarWidth; } } else { NS_ASSERTION(aType == nsLayoutUtils::PREF_ISIZE, "Unexpected type"); dropdownContentISize = mDropdownFrame->GetPrefISize(aRenderingContext); if (isUsingOverlayScrollbars) { dropdownContentISize += scrollbarWidth; } } dropdownContentISize = NSCoordSaturatingSubtract(dropdownContentISize, scrollbarWidth, nscoord_MAX); displayISize = std::max(dropdownContentISize, displayISize); } // add room for the dropmarker button if there is one if ((!IsThemed() || presContext->GetTheme()->ThemeNeedsComboboxDropmarker()) && StyleDisplay()->mAppearance != NS_THEME_NONE) { displayISize += scrollbarWidth; } return displayISize; } nscoord nsComboboxControlFrame::GetMinISize(nsRenderingContext *aRenderingContext) { nscoord minISize; DISPLAY_MIN_WIDTH(this, minISize); minISize = GetIntrinsicISize(aRenderingContext, nsLayoutUtils::MIN_ISIZE); return minISize; } nscoord nsComboboxControlFrame::GetPrefISize(nsRenderingContext *aRenderingContext) { nscoord prefISize; DISPLAY_PREF_WIDTH(this, prefISize); prefISize = GetIntrinsicISize(aRenderingContext, nsLayoutUtils::PREF_ISIZE); return prefISize; } void nsComboboxControlFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize, const ReflowInput& aReflowInput, nsReflowStatus& aStatus) { MarkInReflow(); // Constraints we try to satisfy: // 1) Default inline size of button is the vertical scrollbar size // 2) If the inline size of button is bigger than our inline size, set // inline size of button to 0. // 3) Default block size of button is block size of display area // 4) Inline size of display area is whatever is left over from our // inline size after allocating inline size for the button. // 5) Block Size of display area is GetBSizeOfARow() on the // mListControlFrame. if (!mDisplayFrame || !mButtonFrame || !mDropdownFrame) { NS_ERROR("Why did the frame constructor allow this to happen? Fix it!!"); return; } // Make sure the displayed text is the same as the selected option, bug 297389. int32_t selectedIndex; nsAutoString selectedOptionText; if (!mDroppedDown) { selectedIndex = mListControlFrame->GetSelectedIndex(); } else { // In dropped down mode the "selected index" is the hovered menu item, // we want the last selected item which is |mDisplayedIndex| in this case. selectedIndex = mDisplayedIndex; } if (selectedIndex != -1) { mListControlFrame->GetOptionText(selectedIndex, selectedOptionText); } if (mDisplayedOptionText != selectedOptionText) { RedisplayText(selectedIndex); } // First reflow our dropdown so that we know how tall we should be. ReflowDropdown(aPresContext, aReflowInput); RefPtr<nsResizeDropdownAtFinalPosition> resize = new nsResizeDropdownAtFinalPosition(this); if (NS_SUCCEEDED(aPresContext->PresShell()->PostReflowCallback(resize))) { // The reflow callback queue doesn't AddRef so we keep it alive until // it's released in its ReflowFinished / ReflowCallbackCanceled. Unused << resize.forget(); } // Get the width of the vertical scrollbar. That will be the inline // size of the dropdown button. WritingMode wm = aReflowInput.GetWritingMode(); nscoord buttonISize; const nsStyleDisplay *disp = StyleDisplay(); if ((IsThemed(disp) && !aPresContext->GetTheme()->ThemeNeedsComboboxDropmarker()) || StyleDisplay()->mAppearance == NS_THEME_NONE) { buttonISize = 0; } else { nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame); NS_ASSERTION(scrollable, "List must be a scrollable frame"); buttonISize = scrollable->GetNondisappearingScrollbarWidth( PresContext(), aReflowInput.mRenderingContext, wm); if (buttonISize > aReflowInput.ComputedISize()) { buttonISize = 0; } } mDisplayISize = aReflowInput.ComputedISize() - buttonISize; nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus); // The button should occupy the same space as a scrollbar nsSize containerSize = aDesiredSize.PhysicalSize(); LogicalRect buttonRect = mButtonFrame->GetLogicalRect(containerSize); buttonRect.IStart(wm) = aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm) + mDisplayISize - (aReflowInput.ComputedLogicalBorderPadding().IEnd(wm) - aReflowInput.ComputedLogicalPadding().IEnd(wm)); buttonRect.ISize(wm) = buttonISize; buttonRect.BStart(wm) = this->GetLogicalUsedBorder(wm).BStart(wm); buttonRect.BSize(wm) = mDisplayFrame->BSize(wm) + this->GetLogicalUsedPadding(wm).BStartEnd(wm); mButtonFrame->SetRect(buttonRect, containerSize); if (!NS_INLINE_IS_BREAK_BEFORE(aStatus) && !NS_FRAME_IS_FULLY_COMPLETE(aStatus)) { // This frame didn't fit inside a fragmentation container. Splitting // a nsComboboxControlFrame makes no sense, so we override the status here. aStatus = NS_FRAME_COMPLETE; } } //-------------------------------------------------------------- nsIAtom* nsComboboxControlFrame::GetType() const { return nsGkAtoms::comboboxControlFrame; } #ifdef DEBUG_FRAME_DUMP nsresult nsComboboxControlFrame::GetFrameName(nsAString& aResult) const { return MakeFrameName(NS_LITERAL_STRING("ComboboxControl"), aResult); } #endif //---------------------------------------------------------------------- // nsIComboboxControlFrame //---------------------------------------------------------------------- void nsComboboxControlFrame::ShowDropDown(bool aDoDropDown) { MOZ_ASSERT(!XRE_IsContentProcess()); mDelayedShowDropDown = false; EventStates eventStates = mContent->AsElement()->State(); if (aDoDropDown && eventStates.HasState(NS_EVENT_STATE_DISABLED)) { return; } if (!mDroppedDown && aDoDropDown) { nsFocusManager* fm = nsFocusManager::GetFocusManager(); if (!fm || fm->GetFocusedContent() == GetContent()) { DropDownPositionState state = AbsolutelyPositionDropDown(); if (state == eDropDownPositionFinal) { ShowList(aDoDropDown); // might destroy us } else if (state == eDropDownPositionPendingResize) { // Delay until after the resize reflow, see nsAsyncResize. mDelayedShowDropDown = true; } } else { // Delay until we get focus, see SetFocus(). mDelayedShowDropDown = true; } } else if (mDroppedDown && !aDoDropDown) { ShowList(aDoDropDown); // might destroy us } } void nsComboboxControlFrame::SetDropDown(nsIFrame* aDropDownFrame) { mDropdownFrame = aDropDownFrame; mListControlFrame = do_QueryFrame(mDropdownFrame); if (!sFocused && nsContentUtils::IsFocusedContent(GetContent())) { sFocused = this; nsListControlFrame::ComboboxFocusSet(); } } nsIFrame* nsComboboxControlFrame::GetDropDown() { return mDropdownFrame; } /////////////////////////////////////////////////////////////// NS_IMETHODIMP nsComboboxControlFrame::RedisplaySelectedText() { nsAutoScriptBlocker scriptBlocker; return RedisplayText(mListControlFrame->GetSelectedIndex()); } nsresult nsComboboxControlFrame::RedisplayText(int32_t aIndex) { // Get the text to display if (aIndex != -1) { mListControlFrame->GetOptionText(aIndex, mDisplayedOptionText); } else { mDisplayedOptionText.Truncate(); } mDisplayedIndex = aIndex; REFLOW_DEBUG_MSG2("RedisplayText \"%s\"\n", NS_LossyConvertUTF16toASCII(mDisplayedOptionText).get()); // Send reflow command because the new text maybe larger nsresult rv = NS_OK; if (mDisplayContent) { // Don't call ActuallyDisplayText(true) directly here since that // could cause recursive frame construction. See bug 283117 and the comment in // HandleRedisplayTextEvent() below. // Revoke outstanding events to avoid out-of-order events which could mean // displaying the wrong text. mRedisplayTextEvent.Revoke(); NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(), "If we happen to run our redisplay event now, we might kill " "ourselves!"); RefPtr<RedisplayTextEvent> event = new RedisplayTextEvent(this); mRedisplayTextEvent = event; nsContentUtils::AddScriptRunner(event); } return rv; } void nsComboboxControlFrame::HandleRedisplayTextEvent() { // First, make sure that the content model is up to date and we've // constructed the frames for all our content in the right places. // Otherwise they'll end up under the wrong insertion frame when we // ActuallyDisplayText, since that flushes out the content sink by // calling SetText on a DOM node with aNotify set to true. See bug // 289730. nsWeakFrame weakThis(this); PresContext()->Document()-> FlushPendingNotifications(Flush_ContentAndNotify); if (!weakThis.IsAlive()) return; // Redirect frame insertions during this method (see GetContentInsertionFrame()) // so that any reframing that the frame constructor forces upon us is inserted // into the correct parent (mDisplayFrame). See bug 282607. NS_PRECONDITION(!mInRedisplayText, "Nested RedisplayText"); mInRedisplayText = true; mRedisplayTextEvent.Forget(); ActuallyDisplayText(true); if (!weakThis.IsAlive()) return; // XXXbz This should perhaps be eResize. Check. PresContext()->PresShell()->FrameNeedsReflow(mDisplayFrame, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); mInRedisplayText = false; } void nsComboboxControlFrame::ActuallyDisplayText(bool aNotify) { if (mDisplayedOptionText.IsEmpty()) { // Have to use a non-breaking space for line-block-size calculations // to be right static const char16_t space = 0xA0; mDisplayContent->SetText(&space, 1, aNotify); } else { mDisplayContent->SetText(mDisplayedOptionText, aNotify); } } int32_t nsComboboxControlFrame::GetIndexOfDisplayArea() { return mDisplayedIndex; } //---------------------------------------------------------------------- // nsISelectControlFrame //---------------------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::DoneAddingChildren(bool aIsDone) { nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame); if (!listFrame) return NS_ERROR_FAILURE; return listFrame->DoneAddingChildren(aIsDone); } NS_IMETHODIMP nsComboboxControlFrame::AddOption(int32_t aIndex) { if (aIndex <= mDisplayedIndex) { ++mDisplayedIndex; } nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame); return lcf->AddOption(aIndex); } NS_IMETHODIMP nsComboboxControlFrame::RemoveOption(int32_t aIndex) { nsWeakFrame weakThis(this); if (mListControlFrame->GetNumberOfOptions() > 0) { if (aIndex < mDisplayedIndex) { --mDisplayedIndex; } else if (aIndex == mDisplayedIndex) { mDisplayedIndex = 0; // IE6 compat RedisplayText(mDisplayedIndex); } } else { // If we removed the last option, we need to blank things out RedisplayText(-1); } if (!weakThis.IsAlive()) return NS_OK; nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame); return lcf->RemoveOption(aIndex); } NS_IMETHODIMP nsComboboxControlFrame::OnSetSelectedIndex(int32_t aOldIndex, int32_t aNewIndex) { nsAutoScriptBlocker scriptBlocker; RedisplayText(aNewIndex); NS_ASSERTION(mDropdownFrame, "No dropdown frame!"); nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame); NS_ASSERTION(listFrame, "No list frame!"); return listFrame->OnSetSelectedIndex(aOldIndex, aNewIndex); } // End nsISelectControlFrame //---------------------------------------------------------------------- nsresult nsComboboxControlFrame::HandleEvent(nsPresContext* aPresContext, WidgetGUIEvent* aEvent, nsEventStatus* aEventStatus) { NS_ENSURE_ARG_POINTER(aEventStatus); if (nsEventStatus_eConsumeNoDefault == *aEventStatus) { return NS_OK; } EventStates eventStates = mContent->AsElement()->State(); if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) { return NS_OK; } #if COMBOBOX_ROLLUP_CONSUME_EVENT == 0 if (aEvent->mMessage == eMouseDown) { nsIWidget* widget = GetNearestWidget(); if (widget && GetContent() == widget->GetLastRollup()) { // This event did a Rollup on this control - prevent it from opening // the dropdown again! *aEventStatus = nsEventStatus_eConsumeNoDefault; return NS_OK; } } #endif // If we have style that affects how we are selected, feed event down to // nsFrame::HandleEvent so that selection takes place when appropriate. if (IsContentDisabled()) { return nsBlockFrame::HandleEvent(aPresContext, aEvent, aEventStatus); } return NS_OK; } nsresult nsComboboxControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue) { nsIFormControlFrame* fcFrame = do_QueryFrame(mDropdownFrame); if (!fcFrame) { return NS_NOINTERFACE; } return fcFrame->SetFormProperty(aName, aValue); } nsContainerFrame* nsComboboxControlFrame::GetContentInsertionFrame() { return mInRedisplayText ? mDisplayFrame : mDropdownFrame->GetContentInsertionFrame(); } nsresult nsComboboxControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements) { // The frames used to display the combo box and the button used to popup the dropdown list // are created through anonymous content. The dropdown list is not created through anonymous // content because its frame is initialized specifically for the drop-down case and it is placed // a special list referenced through NS_COMBO_FRAME_POPUP_LIST_INDEX to keep separate from the // layout of the display and button. // // Note: The value attribute of the display content is set when an item is selected in the dropdown list. // If the content specified below does not honor the value attribute than nothing will be displayed. // For now the content that is created corresponds to two input buttons. It would be better to create the // tag as something other than input, but then there isn't any way to create a button frame since it // isn't possible to set the display type in CSS2 to create a button frame. // create content used for display //nsIAtom* tag = NS_Atomize("mozcombodisplay"); // Add a child text content node for the label nsNodeInfoManager *nimgr = mContent->NodeInfo()->NodeInfoManager(); mDisplayContent = new nsTextNode(nimgr); // set the value of the text node mDisplayedIndex = mListControlFrame->GetSelectedIndex(); if (mDisplayedIndex != -1) { mListControlFrame->GetOptionText(mDisplayedIndex, mDisplayedOptionText); } ActuallyDisplayText(false); if (!aElements.AppendElement(mDisplayContent)) return NS_ERROR_OUT_OF_MEMORY; mButtonContent = mContent->OwnerDoc()->CreateHTMLElement(nsGkAtoms::button); if (!mButtonContent) return NS_ERROR_OUT_OF_MEMORY; // make someone to listen to the button. If its pressed by someone like Accessibility // then open or close the combo box. mButtonListener = new nsComboButtonListener(this); mButtonContent->AddEventListener(NS_LITERAL_STRING("click"), mButtonListener, false, false); mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::type, NS_LITERAL_STRING("button"), false); // Set tabindex="-1" so that the button is not tabbable mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::tabindex, NS_LITERAL_STRING("-1"), false); WritingMode wm = GetWritingMode(); if (wm.IsVertical()) { mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::orientation, wm.IsVerticalRL() ? NS_LITERAL_STRING("left") : NS_LITERAL_STRING("right"), false); } if (!aElements.AppendElement(mButtonContent)) return NS_ERROR_OUT_OF_MEMORY; return NS_OK; } void nsComboboxControlFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements, uint32_t aFilter) { if (mDisplayContent) { aElements.AppendElement(mDisplayContent); } if (mButtonContent) { aElements.AppendElement(mButtonContent); } } // XXXbz this is a for-now hack. Now that display:inline-block works, // need to revisit this. class nsComboboxDisplayFrame : public nsBlockFrame { public: NS_DECL_FRAMEARENA_HELPERS nsComboboxDisplayFrame (nsStyleContext* aContext, nsComboboxControlFrame* aComboBox) : nsBlockFrame(aContext), mComboBox(aComboBox) {} // Need this so that line layout knows that this block's inline size // depends on the available inline size. virtual nsIAtom* GetType() const override; virtual bool IsFrameOfType(uint32_t aFlags) const override { return nsBlockFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplacedContainsBlock)); } virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize, const ReflowInput& aReflowInput, nsReflowStatus& aStatus) override; virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) override; protected: nsComboboxControlFrame* mComboBox; }; NS_IMPL_FRAMEARENA_HELPERS(nsComboboxDisplayFrame) nsIAtom* nsComboboxDisplayFrame::GetType() const { return nsGkAtoms::comboboxDisplayFrame; } void nsComboboxDisplayFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize, const ReflowInput& aReflowInput, nsReflowStatus& aStatus) { ReflowInput state(aReflowInput); if (state.ComputedBSize() == NS_INTRINSICSIZE) { // Note that the only way we can have a computed block size here is // if the combobox had a specified block size. If it didn't, size // based on what our rows look like, for lack of anything better. state.SetComputedBSize(mComboBox->mListControlFrame->GetBSizeOfARow()); } WritingMode wm = aReflowInput.GetWritingMode(); nscoord computedISize = mComboBox->mDisplayISize - state.ComputedLogicalBorderPadding().IStartEnd(wm); if (computedISize < 0) { computedISize = 0; } state.SetComputedISize(computedISize); nsBlockFrame::Reflow(aPresContext, aDesiredSize, state, aStatus); aStatus = NS_FRAME_COMPLETE; // this type of frame can't be split } void nsComboboxDisplayFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsDisplayListCollection set; nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, set); // remove background items if parent frame is themed if (mComboBox->IsThemed()) { set.BorderBackground()->DeleteAll(); } set.MoveTo(aLists); } nsIFrame* nsComboboxControlFrame::CreateFrameFor(nsIContent* aContent) { NS_PRECONDITION(nullptr != aContent, "null ptr"); NS_ASSERTION(mDisplayContent, "mDisplayContent can't be null!"); if (mDisplayContent != aContent) { // We only handle the frames for mDisplayContent here return nullptr; } // Get PresShell nsIPresShell *shell = PresContext()->PresShell(); StyleSetHandle styleSet = shell->StyleSet(); // create the style contexts for the anonymous block frame and text frame RefPtr<nsStyleContext> styleContext; styleContext = styleSet-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::mozDisplayComboboxControlFrame, mStyleContext, nsStyleSet::eSkipParentDisplayBasedStyleFixup); RefPtr<nsStyleContext> textStyleContext; textStyleContext = styleSet->ResolveStyleForText(mDisplayContent, mStyleContext); // Start by creating our anonymous block frame mDisplayFrame = new (shell) nsComboboxDisplayFrame(styleContext, this); mDisplayFrame->Init(mContent, this, nullptr); // Create a text frame and put it inside the block frame nsIFrame* textFrame = NS_NewTextFrame(shell, textStyleContext); // initialize the text frame textFrame->Init(aContent, mDisplayFrame, nullptr); mDisplayContent->SetPrimaryFrame(textFrame); nsFrameList textList(textFrame, textFrame); mDisplayFrame->SetInitialChildList(kPrincipalList, textList); return mDisplayFrame; } void nsComboboxControlFrame::DestroyFrom(nsIFrame* aDestructRoot) { if (sFocused == this) { sFocused = nullptr; } // Revoke any pending RedisplayTextEvent mRedisplayTextEvent.Revoke(); nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false); if (mDroppedDown) { MOZ_ASSERT(mDropdownFrame, "mDroppedDown without frame"); nsView* view = mDropdownFrame->GetView(); MOZ_ASSERT(view); nsIWidget* widget = view->GetWidget(); if (widget) { widget->CaptureRollupEvents(this, false); } } // Cleanup frames in popup child list mPopupFrames.DestroyFramesFrom(aDestructRoot); nsContentUtils::DestroyAnonymousContent(&mDisplayContent); nsContentUtils::DestroyAnonymousContent(&mButtonContent); nsBlockFrame::DestroyFrom(aDestructRoot); } const nsFrameList& nsComboboxControlFrame::GetChildList(ChildListID aListID) const { if (kSelectPopupList == aListID) { return mPopupFrames; } return nsBlockFrame::GetChildList(aListID); } void nsComboboxControlFrame::GetChildLists(nsTArray<ChildList>* aLists) const { nsBlockFrame::GetChildLists(aLists); mPopupFrames.AppendIfNonempty(aLists, kSelectPopupList); } void nsComboboxControlFrame::SetInitialChildList(ChildListID aListID, nsFrameList& aChildList) { if (kSelectPopupList == aListID) { mPopupFrames.SetFrames(aChildList); } else { for (nsFrameList::Enumerator e(aChildList); !e.AtEnd(); e.Next()) { nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(e.get()->GetContent()); if (formControl && formControl->GetType() == NS_FORM_BUTTON_BUTTON) { mButtonFrame = e.get(); break; } } NS_ASSERTION(mButtonFrame, "missing button frame in initial child list"); nsBlockFrame::SetInitialChildList(aListID, aChildList); } } //---------------------------------------------------------------------- //nsIRollupListener //---------------------------------------------------------------------- bool nsComboboxControlFrame::Rollup(uint32_t aCount, bool aFlush, const nsIntPoint* pos, nsIContent** aLastRolledUp) { if (!mDroppedDown) { return false; } bool consume = !!COMBOBOX_ROLLUP_CONSUME_EVENT; nsWeakFrame weakFrame(this); mListControlFrame->AboutToRollup(); // might destroy us if (!weakFrame.IsAlive()) { return consume; } ShowDropDown(false); // might destroy us if (weakFrame.IsAlive()) { mListControlFrame->CaptureMouseEvents(false); } if (aFlush && weakFrame.IsAlive()) { // The popup's visibility doesn't update until the minimize animation has // finished, so call UpdateWidgetGeometry to update it right away. nsViewManager* viewManager = mDropdownFrame->GetView()->GetViewManager(); viewManager->UpdateWidgetGeometry(); // might destroy us } if (!weakFrame.IsAlive()) { return consume; } if (aLastRolledUp) { *aLastRolledUp = GetContent(); } return consume; } nsIWidget* nsComboboxControlFrame::GetRollupWidget() { nsView* view = mDropdownFrame->GetView(); MOZ_ASSERT(view); return view->GetWidget(); } void nsComboboxControlFrame::RollupFromList() { if (ShowList(false)) mListControlFrame->CaptureMouseEvents(false); } int32_t nsComboboxControlFrame::UpdateRecentIndex(int32_t aIndex) { int32_t index = mRecentSelectedIndex; if (mRecentSelectedIndex == NS_SKIP_NOTIFY_INDEX || aIndex == NS_SKIP_NOTIFY_INDEX) mRecentSelectedIndex = aIndex; return index; } class nsDisplayComboboxFocus : public nsDisplayItem { public: nsDisplayComboboxFocus(nsDisplayListBuilder* aBuilder, nsComboboxControlFrame* aFrame) : nsDisplayItem(aBuilder, aFrame) { MOZ_COUNT_CTOR(nsDisplayComboboxFocus); } #ifdef NS_BUILD_REFCNT_LOGGING virtual ~nsDisplayComboboxFocus() { MOZ_COUNT_DTOR(nsDisplayComboboxFocus); } #endif virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) override; NS_DISPLAY_DECL_NAME("ComboboxFocus", TYPE_COMBOBOX_FOCUS) }; void nsDisplayComboboxFocus::Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) { static_cast<nsComboboxControlFrame*>(mFrame) ->PaintFocus(*aCtx->GetDrawTarget(), ToReferenceFrame()); } void nsComboboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { #ifdef NOISY printf("%p paint at (%d, %d, %d, %d)\n", this, aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height); #endif if (aBuilder->IsForEventDelivery()) { // Don't allow children to receive events. // REVIEW: following old GetFrameForPoint DisplayBorderBackgroundOutline(aBuilder, aLists); } else { // REVIEW: Our in-flow child frames are inline-level so they will paint in our // content list, so we don't need to mess with layers. nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists); } // draw a focus indicator only when focus rings should be drawn nsIDocument* doc = mContent->GetComposedDoc(); if (doc) { nsPIDOMWindowOuter* window = doc->GetWindow(); if (window && window->ShouldShowFocusRing()) { nsPresContext *presContext = PresContext(); const nsStyleDisplay *disp = StyleDisplay(); if ((!IsThemed(disp) || !presContext->GetTheme()->ThemeDrawsFocusForWidget(disp->mAppearance)) && mDisplayFrame && IsVisibleForPainting(aBuilder)) { aLists.Content()->AppendNewToTop( new (aBuilder) nsDisplayComboboxFocus(aBuilder, this)); } } } DisplaySelectionOverlay(aBuilder, aLists.Content()); } void nsComboboxControlFrame::PaintFocus(DrawTarget& aDrawTarget, nsPoint aPt) { /* Do we need to do anything? */ EventStates eventStates = mContent->AsElement()->State(); if (eventStates.HasState(NS_EVENT_STATE_DISABLED) || sFocused != this) return; int32_t appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel(); nsRect clipRect = mDisplayFrame->GetRect() + aPt; aDrawTarget.PushClipRect(NSRectToSnappedRect(clipRect, appUnitsPerDevPixel, aDrawTarget)); // REVIEW: Why does the old code paint mDisplayFrame again? We've // already painted it in the children above. So clipping it here won't do // us much good. ///////////////////// // draw focus StrokeOptions strokeOptions; nsLayoutUtils::InitDashPattern(strokeOptions, NS_STYLE_BORDER_STYLE_DOTTED); ColorPattern color(ToDeviceColor(StyleColor()->mColor)); nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1); clipRect.width -= onePixel; clipRect.height -= onePixel; Rect r = ToRect(nsLayoutUtils::RectToGfxRect(clipRect, appUnitsPerDevPixel)); StrokeSnappedEdgesOfRect(r, aDrawTarget, color, strokeOptions); aDrawTarget.PopClip(); } //--------------------------------------------------------- // gets the content (an option) by index and then set it as // being selected or not selected //--------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::OnOptionSelected(int32_t aIndex, bool aSelected) { if (mDroppedDown) { nsISelectControlFrame *selectFrame = do_QueryFrame(mListControlFrame); if (selectFrame) { selectFrame->OnOptionSelected(aIndex, aSelected); } } else { if (aSelected) { nsAutoScriptBlocker blocker; RedisplayText(aIndex); } else { nsWeakFrame weakFrame(this); RedisplaySelectedText(); if (weakFrame.IsAlive()) { FireValueChangeEvent(); // Fire after old option is unselected } } } return NS_OK; } void nsComboboxControlFrame::FireValueChangeEvent() { // Fire ValueChange event to indicate data value of combo box has changed nsContentUtils::AddScriptRunner( new AsyncEventDispatcher(mContent, NS_LITERAL_STRING("ValueChange"), true, false)); } void nsComboboxControlFrame::OnContentReset() { if (mListControlFrame) { mListControlFrame->OnContentReset(); } } //-------------------------------------------------------- // nsIStatefulFrame //-------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::SaveState(nsPresState** aState) { MOZ_ASSERT(!(*aState)); (*aState) = new nsPresState(); (*aState)->SetDroppedDown(mDroppedDown); return NS_OK; } NS_IMETHODIMP nsComboboxControlFrame::RestoreState(nsPresState* aState) { if (!aState) { return NS_ERROR_FAILURE; } ShowList(aState->GetDroppedDown()); // might destroy us return NS_OK; } // Append a suffix so that the state key for the combobox is different // from the state key the list control uses to sometimes save the scroll // position for the same Element NS_IMETHODIMP nsComboboxControlFrame::GenerateStateKey(nsIContent* aContent, nsIDocument* aDocument, nsACString& aKey) { nsresult rv = nsContentUtils::GenerateStateKey(aContent, aDocument, aKey); if (NS_FAILED(rv) || aKey.IsEmpty()) { return rv; } aKey.Append("CCF"); return NS_OK; } // Fennec uses a custom combobox built-in widget. // /* static */ bool nsComboboxControlFrame::ToolkitHasNativePopup() { #ifdef MOZ_USE_NATIVE_POPUP_WINDOWS return true; #else return false; #endif /* MOZ_USE_NATIVE_POPUP_WINDOWS */ }