/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Pierre Phaneuf * Mats Palmgren * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "nsCOMPtr.h" #include "nsReadableUtils.h" #include "nsComboboxControlFrame.h" #include "nsIDOMEventTarget.h" #include "nsFrameManager.h" #include "nsFormControlFrame.h" #include "nsGfxButtonControlFrame.h" #include "nsGkAtoms.h" #include "nsCSSAnonBoxes.h" #include "nsHTMLParts.h" #include "nsIFormControl.h" #include "nsINameSpaceManager.h" #include "nsIDOMElement.h" #include "nsIListControlFrame.h" #include "nsIDOMHTMLCollection.h" #include "nsIDOMHTMLSelectElement.h" #include "nsIDOMHTMLOptionElement.h" #include "nsIDOMNSHTMLOptionCollectn.h" #include "nsIPresShell.h" #include "nsIDeviceContext.h" #include "nsIView.h" #include "nsIViewManager.h" #include "nsIScrollableView.h" #include "nsEventDispatcher.h" #include "nsIEventStateManager.h" #include "nsIEventListenerManager.h" #include "nsIDOMNode.h" #include "nsIPrivateDOMEvent.h" #include "nsISelectControlFrame.h" #include "nsXPCOM.h" #include "nsISupportsPrimitives.h" #include "nsIComponentManager.h" #include "nsContentUtils.h" #include "nsTextFragment.h" #include "nsCSSFrameConstructor.h" #include "nsIDocument.h" #include "nsINodeInfo.h" #include "nsIScrollableFrame.h" #include "nsListControlFrame.h" #include "nsContentCID.h" #ifdef ACCESSIBILITY #include "nsIAccessibilityService.h" #endif #include "nsIServiceManager.h" #include "nsIDOMNode.h" #include "nsGUIEvent.h" #include "nsAutoPtr.h" #include "nsStyleSet.h" #include "nsNodeInfoManager.h" #include "nsContentCreatorFunctions.h" #include "nsLayoutUtils.h" #include "nsDisplayList.h" #include "nsITheme.h" #include "nsThemeConstants.h" 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 it's arrow button is clicked on the drop-down list is displayed // If mouse exit's 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. //XXX: This is temporary. It simulates pseudo states by using a attribute selector on const PRInt32 kSizeNotSet = -1; /** * 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 nsIDOMMouseListener { public: NS_DECL_ISUPPORTS NS_IMETHOD HandleEvent(nsIDOMEvent* anEvent) { return PR_FALSE; } NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent) { return PR_FALSE; } NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent) { return PR_FALSE; } NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent) { return PR_FALSE; } NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent) { return PR_FALSE; } NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent) { return PR_FALSE; } NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent) { mComboBox->ShowDropDown(!mComboBox->IsDroppedDown()); return NS_OK; } nsComboButtonListener(nsComboboxControlFrame* aCombobox) { mComboBox = aCombobox; } virtual ~nsComboButtonListener() {} nsComboboxControlFrame* mComboBox; }; NS_IMPL_ISUPPORTS2(nsComboButtonListener, nsIDOMMouseListener, nsIDOMEventListener) // static class data member for Bug 32920 nsComboboxControlFrame * nsComboboxControlFrame::mFocused = nsnull; nsIFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 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 PRInt32 gTotalReqs = 0;; static PRInt32 gTotalReflows = 0;; static PRInt32 gReflowControlCntRQ[MAX_REFLOW_CNT]; static PRInt32 gReflowControlCnt[MAX_REFLOW_CNT]; static PRInt32 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), mDisplayWidth(0) { mListControlFrame = nsnull; mDroppedDown = PR_FALSE; mDisplayFrame = nsnull; mButtonFrame = nsnull; mDropdownFrame = nsnull; mInRedisplayText = PR_FALSE; mRecentSelectedIndex = NS_SKIP_NOTIFY_INDEX; 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_ENTRY(nsIScrollableViewProvider) NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame) NS_IMPL_QUERY_INTERFACE1(nsComboboxControlFrame, nsIRollupListener) NS_IMETHODIMP_(nsrefcnt) nsComboboxControlFrame::AddRef() { return 2; } NS_IMETHODIMP_(nsrefcnt) nsComboboxControlFrame::Release() { return 1; } #ifdef ACCESSIBILITY NS_IMETHODIMP nsComboboxControlFrame::GetAccessible(nsIAccessible** aAccessible) { nsCOMPtr accService = do_GetService("@mozilla.org/accessibilityService;1"); if (accService) { nsCOMPtr node = do_QueryInterface(mContent); nsCOMPtr weakShell(do_GetWeakReference(PresContext()->PresShell())); return accService->CreateHTMLComboboxAccessible(node, weakShell, aAccessible); } return NS_ERROR_FAILURE; } #endif void nsComboboxControlFrame::SetFocus(PRBool aOn, PRBool aRepaint) { nsWeakFrame weakFrame(this); if (aOn) { nsListControlFrame::ComboboxFocusSet(); mFocused = this; } else { mFocused = nsnull; if (mDroppedDown) { mListControlFrame->ComboboxFinish(mDisplayedIndex); // might destroy us if (!weakFrame.IsAlive()) { return; } } // May delete |this|. mListControlFrame->FireOnChange(); } 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 Invalidate(nsRect(0,0,mRect.width,mRect.height)); // Make sure the content area gets updated for where the dropdown was // This is only needed for embedding, the focus may go to // the chrome that is not part of the Gecko system (Bug 83493) // XXX this is rather inefficient nsIViewManager* vm = PresContext()->GetPresShell()->GetViewManager(); if (vm) { vm->UpdateAllViews(NS_VMREFRESH_NO_SYNC); } } void nsComboboxControlFrame::ShowPopup(PRBool aShowPopup) { nsIView* view = mDropdownFrame->GetView(); nsIViewManager* 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 nsEventStatus status = nsEventStatus_eIgnore; nsMouseEvent event(PR_TRUE, aShowPopup ? NS_XUL_POPUP_SHOWING : NS_XUL_POPUP_HIDING, nsnull, nsMouseEvent::eReal); nsCOMPtr shell = PresContext()->GetPresShell(); if (shell) shell->HandleDOMEventWithTarget(mContent, &event, &status); } PRBool nsComboboxControlFrame::ShowList(PRBool aShowList) { nsCOMPtr shell = PresContext()->GetPresShell(); nsWeakFrame weakFrame(this); ShowPopup(aShowList); // might destroy us if (!weakFrame.IsAlive()) { return PR_FALSE; } mDroppedDown = aShowList; if (mDroppedDown) { // The listcontrol frame will call back to the nsComboboxControlFrame's // ListWasSelected which will stop the capture. mListControlFrame->AboutToDropDown(); mListControlFrame->CaptureMouseEvents(PR_TRUE); } // XXXbz so why do we need to flush here, exactly? shell->GetDocument()->FlushPendingNotifications(Flush_Layout); if (!weakFrame.IsAlive()) { return PR_FALSE; } nsIFrame* listFrame = do_QueryFrame(mListControlFrame); if (listFrame) { nsIView* view = listFrame->GetView(); NS_ASSERTION(view, "nsComboboxControlFrame view is null"); if (view) { nsIWidget* widget = view->GetWidget(); if (widget) widget->CaptureRollupEvents(this, mDroppedDown, mDroppedDown); } } return weakFrame.IsAlive(); } nsresult nsComboboxControlFrame::ReflowDropdown(nsPresContext* aPresContext, const nsHTMLReflowState& aReflowState) { // All we want out of it later on, really, is the height 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 (!aReflowState.ShouldReflowAllKids() && !NS_SUBTREE_DIRTY(mDropdownFrame)) { return NS_OK; } // XXXbz this will, for small-height dropdowns, have extra space on the right // edge for the scrollbar we don't show... but that's the best we can do here // for now. nsSize availSize(aReflowState.availableWidth, NS_UNCONSTRAINEDSIZE); nsHTMLReflowState kidReflowState(aPresContext, aReflowState, mDropdownFrame, availSize); // If the dropdown's intrinsic width is narrower than our specified width, // then expand it out. We want our border-box width to end up the same as // the dropdown's so account for both sets of mComputedBorderPadding. nscoord forcedWidth = aReflowState.ComputedWidth() + aReflowState.mComputedBorderPadding.LeftRight() - kidReflowState.mComputedBorderPadding.LeftRight(); kidReflowState.SetComputedWidth(NS_MAX(kidReflowState.ComputedWidth(), forcedWidth)); // ensure we start off hidden if (GetStateBits() & NS_FRAME_FIRST_REFLOW) { nsIView* view = mDropdownFrame->GetView(); nsIViewManager* 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 PRInt32 flags = NS_FRAME_NO_MOVE_FRAME | NS_FRAME_NO_VISIBILITY | NS_FRAME_NO_SIZE_VIEW; if (mDroppedDown) { flags = 0; } nsRect rect = mDropdownFrame->GetRect(); nsHTMLReflowMetrics desiredSize; nsReflowStatus ignoredStatus; nsresult rv = ReflowChild(mDropdownFrame, aPresContext, desiredSize, kidReflowState, rect.x, rect.y, flags, ignoredStatus); // Set the child's width and height to it's desired size FinishReflowChild(mDropdownFrame, aPresContext, &kidReflowState, desiredSize, rect.x, rect.y, flags); return rv; } void nsComboboxControlFrame::AbsolutelyPositionDropDown() { // Position the dropdown list. It is positioned below the display frame if there is enough // room on the screen to display the entire list. Otherwise it is placed above the display // frame. // Note: As 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 it's AbsoluteBounds. The problem with this approach, is that the dropdown lists y location can // change based on whether the dropdown is placed below or above the display frame. // The approach, taken here is to get use the absolute position of the display frame and use it's location // to determine if the dropdown will go offscreen. // Use the height calculated for the area frame so it includes both // the display and button heights. nscoord dropdownYOffset = GetRect().height; nsSize dropdownSize = mDropdownFrame->GetSize(); nsRect screen = nsFormControlFrame::GetUsableScreenRect(PresContext()); // Check to see if the drop-down list will go offscreen if (GetScreenRectInAppUnits().YMost() + dropdownSize.height > screen.YMost()) { // move the dropdown list up dropdownYOffset = - (dropdownSize.height); } nsPoint dropdownPosition; const nsStyleVisibility* vis = GetStyleVisibility(); if (vis->mDirection == NS_STYLE_DIRECTION_RTL) { // Align the right edge of the drop-down with the right edge of the control. dropdownPosition.x = GetRect().width - dropdownSize.width; } else { dropdownPosition.x = 0; } dropdownPosition.y = dropdownYOffset; mDropdownFrame->SetPosition(dropdownPosition); } //---------------------------------------------------------- // //---------------------------------------------------------- #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::GetIntrinsicWidth(nsIRenderingContext* aRenderingContext, nsLayoutUtils::IntrinsicWidthType 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->GetDesiredScrollbarSizes(presContext, aRenderingContext).LeftRight(); } nscoord displayWidth = 0; if (NS_LIKELY(mDisplayFrame)) { displayWidth = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, mDisplayFrame, aType); } if (mDropdownFrame) { nscoord dropdownContentWidth; if (aType == nsLayoutUtils::MIN_WIDTH) { dropdownContentWidth = mDropdownFrame->GetMinWidth(aRenderingContext); } else { NS_ASSERTION(aType == nsLayoutUtils::PREF_WIDTH, "Unexpected type"); dropdownContentWidth = mDropdownFrame->GetPrefWidth(aRenderingContext); } dropdownContentWidth = NSCoordSaturatingSubtract(dropdownContentWidth, scrollbarWidth, nscoord_MAX); displayWidth = NS_MAX(dropdownContentWidth, displayWidth); } // add room for the dropmarker button if there is one if (!IsThemed() || presContext->GetTheme()->ThemeNeedsComboboxDropmarker()) displayWidth += scrollbarWidth; return displayWidth; } nscoord nsComboboxControlFrame::GetMinWidth(nsIRenderingContext *aRenderingContext) { nscoord minWidth; DISPLAY_MIN_WIDTH(this, minWidth); minWidth = GetIntrinsicWidth(aRenderingContext, nsLayoutUtils::MIN_WIDTH); return minWidth; } nscoord nsComboboxControlFrame::GetPrefWidth(nsIRenderingContext *aRenderingContext) { nscoord prefWidth; DISPLAY_PREF_WIDTH(this, prefWidth); prefWidth = GetIntrinsicWidth(aRenderingContext, nsLayoutUtils::PREF_WIDTH); return prefWidth; } NS_IMETHODIMP nsComboboxControlFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { // Constraints we try to satisfy: // 1) Default width of button is the vertical scrollbar size // 2) If the width of button is bigger than our width, set width of // button to 0. // 3) Default height of button is height of display area // 4) Width of display area is whatever is left over from our width after // allocating width for the button. // 5) Height of display area is GetHeightOfARow() on the // mListControlFrame. if (!mDisplayFrame || !mButtonFrame || !mDropdownFrame) { NS_ERROR("Why did the frame constructor allow this to happen? Fix it!!"); return NS_ERROR_UNEXPECTED; } // Make sure the displayed text is the same as the selected option, bug 297389. PRInt32 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, aReflowState); // Get the width of the vertical scrollbar. That will be the width of the // dropdown button. nscoord buttonWidth; const nsStyleDisplay *disp = GetStyleDisplay(); if (IsThemed(disp) && !aPresContext->GetTheme()->ThemeNeedsComboboxDropmarker()) { buttonWidth = 0; } else { nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame); NS_ASSERTION(scrollable, "List must be a scrollable frame"); buttonWidth = scrollable->GetDesiredScrollbarSizes(PresContext(), aReflowState.rendContext).LeftRight(); if (buttonWidth > aReflowState.ComputedWidth()) { buttonWidth = 0; } } mDisplayWidth = aReflowState.ComputedWidth() - buttonWidth; nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus); NS_ENSURE_SUCCESS(rv, rv); // Now set the correct width and height on our button. The width we need to // set always, the height only if we had an auto height. nsRect buttonRect = mButtonFrame->GetRect(); // If we have a non-intrinsic computed height, our kids should have sized // themselves properly on their own. if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) { // The display frame is going to be the right height and width at this // point. Use its height as the button height. nsRect displayRect = mDisplayFrame->GetRect(); buttonRect.height = displayRect.height; buttonRect.y = displayRect.y; } #ifdef DEBUG else { nscoord buttonHeight = mButtonFrame->GetSize().height; nscoord displayHeight = mDisplayFrame->GetSize().height; // The button and display area should be equal heights, unless the computed // height on the combobox is too small to fit their borders and padding. NS_ASSERTION(buttonHeight == displayHeight || (aReflowState.ComputedHeight() < buttonHeight && buttonHeight == mButtonFrame->GetUsedBorderAndPadding().TopBottom()) || (aReflowState.ComputedHeight() < displayHeight && displayHeight == mDisplayFrame->GetUsedBorderAndPadding().TopBottom()), "Different heights?"); } #endif if (GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) { // Make sure the right edge of the button frame stays where it is now buttonRect.x -= buttonWidth - buttonRect.width; } buttonRect.width = buttonWidth; mButtonFrame->SetRect(buttonRect); return rv; } //-------------------------------------------------------------- nsIAtom* nsComboboxControlFrame::GetType() const { return nsGkAtoms::comboboxControlFrame; } #ifdef NS_DEBUG NS_IMETHODIMP nsComboboxControlFrame::GetFrameName(nsAString& aResult) const { return MakeFrameName(NS_LITERAL_STRING("ComboboxControl"), aResult); } #endif //---------------------------------------------------------------------- // nsIComboboxControlFrame //---------------------------------------------------------------------- void nsComboboxControlFrame::ShowDropDown(PRBool aDoDropDown) { if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) { return; } if (!mDroppedDown && aDoDropDown) { if (mListControlFrame) { mListControlFrame->SyncViewWithFrame(); } ShowList(aDoDropDown); // might destroy us } else if (mDroppedDown && !aDoDropDown) { ShowList(aDoDropDown); // might destroy us } } void nsComboboxControlFrame::SetDropDown(nsIFrame* aDropDownFrame) { mDropdownFrame = aDropDownFrame; mListControlFrame = do_QueryFrame(mDropdownFrame); } nsIFrame* nsComboboxControlFrame::GetDropDown() { return mDropdownFrame; } /////////////////////////////////////////////////////////////// NS_IMETHODIMP nsComboboxControlFrame::RedisplaySelectedText() { nsAutoScriptBlocker scriptBlocker; return RedisplayText(mListControlFrame->GetSelectedIndex()); } nsresult nsComboboxControlFrame::RedisplayText(PRInt32 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(PR_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!"); nsRefPtr event = new RedisplayTextEvent(this); mRedisplayTextEvent = event; if (!nsContentUtils::AddScriptRunner(event)) mRedisplayTextEvent.Forget(); } 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 = PR_TRUE; mRedisplayTextEvent.Forget(); ActuallyDisplayText(PR_TRUE); // XXXbz This should perhaps be eResize. Check. PresContext()->PresShell()->FrameNeedsReflow(mDisplayFrame, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY); mInRedisplayText = PR_FALSE; } void nsComboboxControlFrame::ActuallyDisplayText(PRBool aNotify) { if (mDisplayedOptionText.IsEmpty()) { // Have to use a non-breaking space for line-height calculations // to be right static const PRUnichar space = 0xA0; mDisplayContent->SetText(&space, 1, aNotify); } else { mDisplayContent->SetText(mDisplayedOptionText, aNotify); } } PRInt32 nsComboboxControlFrame::GetIndexOfDisplayArea() { return mDisplayedIndex; } //---------------------------------------------------------------------- // nsISelectControlFrame //---------------------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::DoneAddingChildren(PRBool aIsDone) { nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame); if (!listFrame) return NS_ERROR_FAILURE; return listFrame->DoneAddingChildren(aIsDone); } NS_IMETHODIMP nsComboboxControlFrame::AddOption(PRInt32 aIndex) { if (aIndex <= mDisplayedIndex) { ++mDisplayedIndex; } nsListControlFrame* lcf = static_cast(mDropdownFrame); return lcf->AddOption(aIndex); } NS_IMETHODIMP nsComboboxControlFrame::RemoveOption(PRInt32 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(mDropdownFrame); return lcf->RemoveOption(aIndex); } NS_IMETHODIMP nsComboboxControlFrame::GetOptionSelected(PRInt32 aIndex, PRBool* aValue) { NS_ASSERTION(mDropdownFrame, "No dropdown frame!"); nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame); NS_ASSERTION(listFrame, "No list frame!"); return listFrame->GetOptionSelected(aIndex, aValue); } NS_IMETHODIMP nsComboboxControlFrame::OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 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 //---------------------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::HandleEvent(nsPresContext* aPresContext, nsGUIEvent* aEvent, nsEventStatus* aEventStatus) { NS_ENSURE_ARG_POINTER(aEventStatus); if (nsEventStatus_eConsumeNoDefault == *aEventStatus) { return NS_OK; } if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) { return NS_OK; } // If we have style that affects how we are selected, feed event down to // nsFrame::HandleEvent so that selection takes place when appropriate. const nsStyleUserInterface* uiStyle = GetStyleUserInterface(); if (uiStyle->mUserInput == NS_STYLE_USER_INPUT_NONE || uiStyle->mUserInput == NS_STYLE_USER_INPUT_DISABLED) 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); } nsresult nsComboboxControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const { nsIFormControlFrame* fcFrame = do_QueryFrame(mDropdownFrame); if (!fcFrame) { return NS_ERROR_FAILURE; } return fcFrame->GetFormProperty(aName, aValue); } nsIFrame* nsComboboxControlFrame::GetContentInsertionFrame() { return mInRedisplayText ? mDisplayFrame : mDropdownFrame->GetContentInsertionFrame(); } nsresult nsComboboxControlFrame::CreateAnonymousContent(nsTArray& 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 it's 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_NewAtom("mozcombodisplay"); // Add a child text content node for the label nsNodeInfoManager *nimgr = mContent->NodeInfo()->NodeInfoManager(); NS_NewTextNode(getter_AddRefs(mDisplayContent), nimgr); if (!mDisplayContent) return NS_ERROR_OUT_OF_MEMORY; // set the value of the text node mDisplayedIndex = mListControlFrame->GetSelectedIndex(); if (mDisplayedIndex != -1) { mListControlFrame->GetOptionText(mDisplayedIndex, mDisplayedOptionText); } ActuallyDisplayText(PR_FALSE); if (!aElements.AppendElement(mDisplayContent)) return NS_ERROR_OUT_OF_MEMORY; nsCOMPtr nodeInfo; nodeInfo = nimgr->GetNodeInfo(nsGkAtoms::input, nsnull, kNameSpaceID_XHTML); // create button which drops the list down NS_NewHTMLElement(getter_AddRefs(mButtonContent), nodeInfo, PR_FALSE); 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); if (!mButtonListener) return NS_ERROR_OUT_OF_MEMORY; mButtonContent->AddEventListenerByIID(mButtonListener, NS_GET_IID(nsIDOMMouseListener)); mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::type, NS_LITERAL_STRING("button"), PR_FALSE); // Set tabindex="-1" so that the button is not tabbable mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::tabindex, NS_LITERAL_STRING("-1"), PR_FALSE); if (!aElements.AppendElement(mButtonContent)) return NS_ERROR_OUT_OF_MEMORY; return NS_OK; } // 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 width // depends on the available width. virtual nsIAtom* GetType() const; virtual PRBool IsFrameOfType(PRUint32 aFlags) const { return nsBlockFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplacedContainsBlock)); } NS_IMETHOD Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus); NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists); protected: nsComboboxControlFrame* mComboBox; }; NS_IMPL_FRAMEARENA_HELPERS(nsComboboxDisplayFrame) nsIAtom* nsComboboxDisplayFrame::GetType() const { return nsGkAtoms::comboboxDisplayFrame; } NS_IMETHODIMP nsComboboxDisplayFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { nsHTMLReflowState state(aReflowState); if (state.ComputedHeight() == NS_INTRINSICSIZE) { // Note that the only way we can have a computed height here is if the // combobox had a specified height. If it didn't, size based on what our // rows look like, for lack of anything better. state.SetComputedHeight(mComboBox->mListControlFrame->GetHeightOfARow()); } nscoord computedWidth = mComboBox->mDisplayWidth - state.mComputedBorderPadding.LeftRight(); if (computedWidth < 0) { computedWidth = 0; } state.SetComputedWidth(computedWidth); return nsBlockFrame::Reflow(aPresContext, aDesiredSize, state, aStatus); } NS_IMETHODIMP nsComboboxDisplayFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsDisplayListCollection set; nsresult rv = nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, set); if (NS_FAILED(rv)) return rv; // remove background items if parent frame is themed if (mComboBox->IsThemed()) { set.BorderBackground()->DeleteAll(); } set.MoveTo(aLists); return NS_OK; } nsIFrame* nsComboboxControlFrame::CreateFrameFor(nsIContent* aContent) { NS_PRECONDITION(nsnull != aContent, "null ptr"); NS_ASSERTION(mDisplayContent, "mDisplayContent can't be null!"); if (mDisplayContent != aContent) { // We only handle the frames for mDisplayContent here return nsnull; } // Get PresShell nsIPresShell *shell = PresContext()->PresShell(); nsStyleSet *styleSet = shell->StyleSet(); // create the style contexts for the anonymous block frame and text frame nsRefPtr styleContext; styleContext = styleSet-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::mozDisplayComboboxControlFrame, mStyleContext); if (NS_UNLIKELY(!styleContext)) { return nsnull; } nsRefPtr textStyleContext; textStyleContext = styleSet->ResolveStyleForNonElement(mStyleContext); if (NS_UNLIKELY(!textStyleContext)) { return nsnull; } // Start by by creating our anonymous block frame mDisplayFrame = new (shell) nsComboboxDisplayFrame(styleContext, this); if (NS_UNLIKELY(!mDisplayFrame)) { return nsnull; } nsresult rv = mDisplayFrame->Init(mContent, this, nsnull); if (NS_FAILED(rv)) { mDisplayFrame->Destroy(); mDisplayFrame = nsnull; return nsnull; } // Create a text frame and put it inside the block frame mTextFrame = NS_NewTextFrame(shell, textStyleContext); if (NS_UNLIKELY(!mTextFrame)) { return nsnull; } // initialize the text frame rv = mTextFrame->Init(aContent, mDisplayFrame, nsnull); if (NS_FAILED(rv)) { mDisplayFrame->Destroy(); mDisplayFrame = nsnull; mTextFrame->Destroy(); mTextFrame = nsnull; return nsnull; } nsFrameList textList(mTextFrame, mTextFrame); mDisplayFrame->SetInitialChildList(nsnull, textList); return mDisplayFrame; } void nsComboboxControlFrame::Destroy() { // Revoke any pending RedisplayTextEvent mRedisplayTextEvent.Revoke(); nsFormControlFrame::RegUnRegAccessKey(static_cast(this), PR_FALSE); if (mDroppedDown) { // Get parent view nsIFrame * listFrame = do_QueryFrame(mListControlFrame); if (listFrame) { nsIView* view = listFrame->GetView(); NS_ASSERTION(view, "nsComboboxControlFrame view is null"); if (view) { nsIWidget* widget = view->GetWidget(); if (widget) widget->CaptureRollupEvents(this, PR_FALSE, PR_TRUE); } } } // Cleanup frames in popup child list mPopupFrames.DestroyFrames(); nsContentUtils::DestroyAnonymousContent(&mDisplayContent); nsContentUtils::DestroyAnonymousContent(&mButtonContent); nsBlockFrame::Destroy(); } nsFrameList nsComboboxControlFrame::GetChildList(nsIAtom* aListName) const { if (nsGkAtoms::selectPopupList == aListName) { return mPopupFrames; } return nsBlockFrame::GetChildList(aListName); } NS_IMETHODIMP nsComboboxControlFrame::SetInitialChildList(nsIAtom* aListName, nsFrameList& aChildList) { nsresult rv = NS_OK; if (nsGkAtoms::selectPopupList == aListName) { mPopupFrames.SetFrames(aChildList); } else { for (nsFrameList::Enumerator e(aChildList); !e.AtEnd(); e.Next()) { nsCOMPtr formControl = do_QueryInterface(e.get()->GetContent()); if (formControl && formControl->GetType() == NS_FORM_INPUT_BUTTON) { mButtonFrame = e.get(); break; } } NS_ASSERTION(mButtonFrame, "missing button frame in initial child list"); rv = nsBlockFrame::SetInitialChildList(aListName, aChildList); } return rv; } #define NS_COMBO_FRAME_POPUP_LIST_INDEX (NS_BLOCK_LIST_COUNT) nsIAtom* nsComboboxControlFrame::GetAdditionalChildListName(PRInt32 aIndex) const { // Maintain a separate child list for the dropdown list (i.e. popup listbox) // This is necessary because we don't want the listbox to be included in the layout // of the combox's children because it would take up space, when it is suppose to // be floating above the display. if (aIndex < NS_BLOCK_LIST_COUNT) { return nsBlockFrame::GetAdditionalChildListName(aIndex); } if (NS_COMBO_FRAME_POPUP_LIST_INDEX == aIndex) { return nsGkAtoms::selectPopupList; } return nsnull; } //---------------------------------------------------------------------- //nsIRollupListener //---------------------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::Rollup(PRUint32 aCount, nsIContent** aLastRolledUp) { if (aLastRolledUp) *aLastRolledUp = nsnull; if (mDroppedDown) { nsWeakFrame weakFrame(this); mListControlFrame->AboutToRollup(); // might destroy us if (!weakFrame.IsAlive()) return NS_OK; ShowDropDown(PR_FALSE); // might destroy us if (!weakFrame.IsAlive()) return NS_OK; mListControlFrame->CaptureMouseEvents(PR_FALSE); } return NS_OK; } void nsComboboxControlFrame::RollupFromList() { if (ShowList(PR_FALSE)) mListControlFrame->CaptureMouseEvents(PR_FALSE); } PRInt32 nsComboboxControlFrame::UpdateRecentIndex(PRInt32 aIndex) { PRInt32 index = mRecentSelectedIndex; if (mRecentSelectedIndex == NS_SKIP_NOTIFY_INDEX || aIndex == NS_SKIP_NOTIFY_INDEX) mRecentSelectedIndex = aIndex; return index; } class nsDisplayComboboxFocus : public nsDisplayItem { public: nsDisplayComboboxFocus(nsComboboxControlFrame* aFrame) : nsDisplayItem(aFrame) { MOZ_COUNT_CTOR(nsDisplayComboboxFocus); } #ifdef NS_BUILD_REFCNT_LOGGING virtual ~nsDisplayComboboxFocus() { MOZ_COUNT_DTOR(nsDisplayComboboxFocus); } #endif virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx); NS_DISPLAY_DECL_NAME("ComboboxFocus") }; void nsDisplayComboboxFocus::Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx) { static_cast(mFrame) ->PaintFocus(*aCtx, aBuilder->ToReferenceFrame(mFrame)); } NS_IMETHODIMP 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 nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists); NS_ENSURE_SUCCESS(rv, rv); } 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. nsresult rv = nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists); NS_ENSURE_SUCCESS(rv, rv); } nsPresContext *presContext = PresContext(); const nsStyleDisplay *disp = GetStyleDisplay(); if ((!IsThemed(disp) || !presContext->GetTheme()->ThemeDrawsFocusForWidget(presContext, this, disp->mAppearance)) && mDisplayFrame && IsVisibleForPainting(aBuilder)) { nsresult rv = aLists.Content()->AppendNewToTop(new (aBuilder) nsDisplayComboboxFocus(this)); NS_ENSURE_SUCCESS(rv, rv); } return DisplaySelectionOverlay(aBuilder, aLists); } void nsComboboxControlFrame::PaintFocus(nsIRenderingContext& aRenderingContext, nsPoint aPt) { /* Do we need to do anything? */ if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::disabled) || mFocused != this) return; aRenderingContext.PushState(); nsRect clipRect = mDisplayFrame->GetRect() + aPt; aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect); // 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 aRenderingContext.SetLineStyle(nsLineStyle_kDotted); aRenderingContext.SetColor(GetStyleColor()->mColor); //aRenderingContext.DrawRect(clipRect); nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1); clipRect.width -= onePixel; clipRect.height -= onePixel; aRenderingContext.DrawLine(clipRect.x, clipRect.y, clipRect.x+clipRect.width, clipRect.y); aRenderingContext.DrawLine(clipRect.x+clipRect.width, clipRect.y, clipRect.x+clipRect.width, clipRect.y+clipRect.height); aRenderingContext.DrawLine(clipRect.x+clipRect.width, clipRect.y+clipRect.height, clipRect.x, clipRect.y+clipRect.height); aRenderingContext.DrawLine(clipRect.x, clipRect.y+clipRect.height, clipRect.x, clipRect.y); aRenderingContext.DrawLine(clipRect.x, clipRect.y+clipRect.height, clipRect.x, clipRect.y); aRenderingContext.PopState(); } //---------------------------------------------------------------------- //nsIScrollableViewProvider //---------------------------------------------------------------------- nsIScrollableView* nsComboboxControlFrame::GetScrollableView() { if (!mDropdownFrame) return nsnull; nsIScrollableFrame* scrollable = do_QueryFrame(mDropdownFrame); if (!scrollable) return nsnull; return scrollable->GetScrollableView(); } //--------------------------------------------------------- // gets the content (an option) by index and then set it as // being selected or not selected //--------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::OnOptionSelected(PRInt32 aIndex, PRBool 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 nsCOMPtr event; nsPresContext* presContext = PresContext(); if (NS_SUCCEEDED(nsEventDispatcher::CreateEvent(presContext, nsnull, NS_LITERAL_STRING("Events"), getter_AddRefs(event)))) { event->InitEvent(NS_LITERAL_STRING("ValueChange"), PR_TRUE, PR_TRUE); nsCOMPtr privateEvent(do_QueryInterface(event)); privateEvent->SetTrusted(PR_TRUE); nsEventDispatcher::DispatchDOMEvent(mContent, nsnull, event, nsnull, nsnull); } } void nsComboboxControlFrame::OnContentReset() { if (mListControlFrame) { mListControlFrame->OnContentReset(); } } //-------------------------------------------------------- // nsIStatefulFrame //-------------------------------------------------------- NS_IMETHODIMP nsComboboxControlFrame::SaveState(SpecialStateID aStateID, nsPresState** aState) { if (!mListControlFrame) return NS_ERROR_FAILURE; nsIStatefulFrame* stateful = do_QueryFrame(mListControlFrame); return stateful->SaveState(aStateID, aState); } NS_IMETHODIMP nsComboboxControlFrame::RestoreState(nsPresState* aState) { if (!mListControlFrame) return NS_ERROR_FAILURE; nsIStatefulFrame* stateful = do_QueryFrame(mListControlFrame); NS_ASSERTION(stateful, "Must implement nsIStatefulFrame"); return stateful->RestoreState(aState); } // // Camino uses a native widget for the combobox // popup, which affects drawing and event // handling here and in nsListControlFrame. // // Also, Fennec use a custom combobox built-in widget // /* static */ PRBool nsComboboxControlFrame::ToolkitHasNativePopup() { return nsContentUtils::GetBoolPref("ui.use_native_popup_windows"); }