pjs/layout/forms/nsComboboxControlFrame.cpp

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/* -*- 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
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*
* 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/
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*
* 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.
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*
* 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 <pp@ludusdesign.com>
* Mats Palmgren <mats.palmgren@bredband.net>
*
* 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"
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#include "nsComboboxControlFrame.h"
#include "nsIDOMEventReceiver.h"
#include "nsFrameManager.h"
#include "nsFormControlFrame.h"
#include "nsGfxButtonControlFrame.h"
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#include "nsHTMLAtoms.h"
#include "nsCSSAnonBoxes.h"
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#include "nsHTMLParts.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
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#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"
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#include "nsIScrollableView.h"
#include "nsIEventStateManager.h"
#include "nsIEventListenerManager.h"
#include "nsIDOMNode.h"
#include "nsIPrivateDOMEvent.h"
#include "nsISupportsArray.h"
#include "nsISelectControlFrame.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsIComponentManager.h"
#include "nsITextContent.h"
#include "nsTextFragment.h"
#include "nsCSSFrameConstructor.h"
#include "nsIDocument.h"
#include "nsINodeInfo.h"
#include "nsIScrollableFrame.h"
#include "nsListControlFrame.h"
#include "nsContentCID.h"
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#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
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#endif
#include "nsIServiceManager.h"
#include "nsIDOMNode.h"
#include "nsGUIEvent.h"
#include "nsAutoPtr.h"
#include "nsStyleSet.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#ifdef MOZ_XUL
#include "nsIXULDocument.h" // Temporary fix for Bug 36558
#endif
#ifdef DO_NEW_REFLOW
#include "nsIFontMetrics.h"
#endif
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
class RedisplayTextEvent : public PLEvent
{
public:
RedisplayTextEvent(nsComboboxControlFrame* aComboboxControlFrame);
void HandleEvent()
{
NS_STATIC_CAST(nsComboboxControlFrame*, owner) ->
HandleRedisplayTextEvent();
}
};
PR_STATIC_CALLBACK(void*)
HandleRedisplayTextPLEvent(PLEvent* aEvent)
{
NS_ASSERTION(nsnull != aEvent, "Event is null");
RedisplayTextEvent* event = NS_STATIC_CAST(RedisplayTextEvent*, aEvent);
event->HandleEvent();
return nsnull;
}
PR_STATIC_CALLBACK(void)
DestroyRedisplayTextPLEvent(PLEvent* aEvent)
{
NS_ASSERTION(nsnull != aEvent, "Event is null");
RedisplayTextEvent* event = NS_STATIC_CAST(RedisplayTextEvent*, aEvent);
delete event;
}
RedisplayTextEvent::RedisplayTextEvent(nsComboboxControlFrame* aComboboxControlFrame)
{
PL_InitEvent(this, aComboboxControlFrame,
::HandleRedisplayTextPLEvent,
::DestroyRedisplayTextPLEvent);
}
class nsPresState;
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#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)
{
PRBool isDroppedDown;
mComboBox->IsDroppedDown(&isDroppedDown);
mComboBox->ShowDropDown(!isDroppedDown);
return PR_FALSE;
}
nsComboButtonListener(nsComboboxControlFrame* aCombobox)
{
mComboBox = aCombobox;
}
virtual ~nsComboButtonListener() {}
nsComboboxControlFrame* mComboBox;
};
NS_IMPL_ISUPPORTS1(nsComboButtonListener, nsIDOMMouseListener)
// static class data member for Bug 32920
nsComboboxControlFrame * nsComboboxControlFrame::mFocused = nsnull;
nsIFrame*
NS_NewComboboxControlFrame(nsIPresShell* aPresShell, PRUint32 aStateFlags)
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{
nsComboboxControlFrame* it = new (aPresShell) nsComboboxControlFrame;
if (it) {
// set the state flags (if any are provided)
it->AddStateBits(aStateFlags);
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}
return it;
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}
//-----------------------------------------------------------
// 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
//------------------------------------------
// Asserts if we return a desired size that
// doesn't correctly match the mComputedWidth
//------------------------------------------
#ifdef DO_UNCONSTRAINED_CHECK
#define UNCONSTRAINED_CHECK() \
if (aReflowState.mComputedWidth != NS_UNCONSTRAINEDSIZE) { \
nscoord width = aDesiredSize.width - borderPadding.left - borderPadding.right; \
if (width != aReflowState.mComputedWidth) { \
printf("aDesiredSize.width %d %d != aReflowState.mComputedWidth %d\n", aDesiredSize.width, width, aReflowState.mComputedWidth); \
} \
NS_ASSERTION(width == aReflowState.mComputedWidth, "Returning bad value when constrained!"); \
}
#else
#define UNCONSTRAINED_CHECK()
#endif
//------------------------------------------------------
//-- Done with macros
//------------------------------------------------------
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nsComboboxControlFrame::nsComboboxControlFrame()
: nsAreaFrame()
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{
mListControlFrame = nsnull;
mDroppedDown = PR_FALSE;
mDisplayFrame = nsnull;
mButtonFrame = nsnull;
mDropdownFrame = nsnull;
mCacheSize.width = kSizeNotSet;
mCacheSize.height = kSizeNotSet;
mCachedAscent = kSizeNotSet;
mCachedMaxElementWidth = kSizeNotSet;
mCachedAvailableSize.width = kSizeNotSet;
mCachedAvailableSize.height = kSizeNotSet;
mCachedUncDropdownSize.width = kSizeNotSet;
mCachedUncDropdownSize.height = kSizeNotSet;
mCachedUncComboSize.width = kSizeNotSet;
mCachedUncComboSize.height = kSizeNotSet;
mItemDisplayWidth = 0;
mInRedisplayText = PR_FALSE;
mRedisplayTextEventPosted = PR_FALSE;
mRecentSelectedIndex = -1;
//Shrink the area around its contents
//SetFlags(NS_BLOCK_SHRINK_WRAP);
REFLOW_COUNTER_INIT()
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}
//--------------------------------------------------------------
nsComboboxControlFrame::~nsComboboxControlFrame()
{
REFLOW_COUNTER_DUMP("nsCCF");
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}
//--------------------------------------------------------------
// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
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nsComboboxControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(NS_GET_IID(nsIComboboxControlFrame))) {
*aInstancePtr = (void*)(nsIComboboxControlFrame*)this;
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return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsIFormControlFrame))) {
*aInstancePtr = (void*)(nsIFormControlFrame*)this;
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return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsIAnonymousContentCreator))) {
*aInstancePtr = (void*)(nsIAnonymousContentCreator*)this;
return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsISelectControlFrame))) {
*aInstancePtr = (void *)(nsISelectControlFrame*)this;
return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsIStatefulFrame))) {
*aInstancePtr = (void*)(nsIStatefulFrame*)this;
return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsIRollupListener))) {
*aInstancePtr = (void*)(nsIRollupListener*)this;
return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsIScrollableViewProvider))) {
*aInstancePtr = (void*)(nsIScrollableViewProvider*)this;
return NS_OK;
}
return nsAreaFrame::QueryInterface(aIID, aInstancePtr);
}
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#ifdef ACCESSIBILITY
NS_IMETHODIMP nsComboboxControlFrame::GetAccessible(nsIAccessible** aAccessible)
{
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(mContent);
nsCOMPtr<nsIWeakReference> weakShell(do_GetWeakReference(GetPresContext()->PresShell()));
return accService->CreateHTMLComboboxAccessible(node, weakShell, aAccessible);
}
return NS_ERROR_FAILURE;
}
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#endif
NS_IMETHODIMP
nsComboboxControlFrame::Init(nsPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
mEventQueueService = do_GetService(kEventQueueServiceCID);
return nsAreaFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
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}
void
nsComboboxControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
{
if (aOn) {
nsListControlFrame::ComboboxFocusSet();
mFocused = this;
} else {
mFocused = nsnull;
if (mDroppedDown) {
mListControlFrame->ComboboxFinish(mDisplayedIndex);
}
mListControlFrame->FireOnChange();
}
// 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), PR_TRUE);
// 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
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nsIViewManager* vm = GetPresContext()->GetViewManager();
if (vm) {
vm->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
}
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}
void
nsComboboxControlFrame::ShowPopup(PRBool aShowPopup)
{
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nsIView* view = mDropdownFrame->GetView();
nsIViewManager* viewManager = view->GetViewManager();
if (aShowPopup) {
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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);
nsIPresShell *shell = GetPresContext()->GetPresShell();
if (shell)
shell->HandleDOMEventWithTarget(mContent, &event, &status);
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}
// Show the dropdown list
void
nsComboboxControlFrame::ShowList(nsPresContext* aPresContext, PRBool aShowList)
{
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nsIWidget* widget = nsnull;
// Get parent view
nsIFrame * listFrame;
if (NS_OK == mListControlFrame->QueryInterface(NS_GET_IID(nsIFrame), (void **)&listFrame)) {
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nsIView* view = listFrame->GetView();
NS_ASSERTION(view, "nsComboboxControlFrame view is null");
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if (view) {
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widget = view->GetWidget();
}
}
if (PR_TRUE == aShowList) {
ShowPopup(PR_TRUE);
mDroppedDown = PR_TRUE;
// The listcontrol frame will call back to the nsComboboxControlFrame's ListWasSelected
// which will stop the capture.
mListControlFrame->AboutToDropDown();
mListControlFrame->CaptureMouseEvents(aPresContext, PR_TRUE);
} else {
ShowPopup(PR_FALSE);
mDroppedDown = PR_FALSE;
}
// Don't flush anything but reflows lest it destroy us
aPresContext->PresShell()->
GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
if (widget)
widget->CaptureRollupEvents((nsIRollupListener *)this, mDroppedDown, aShowList);
}
nsresult
nsComboboxControlFrame::ReflowComboChildFrame(nsIFrame* aFrame,
nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nscoord aAvailableWidth,
nscoord aAvailableHeight)
{
// Constrain the child's width and height to aAvailableWidth and aAvailableHeight
nsSize availSize(aAvailableWidth, aAvailableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aFrame,
availSize);
kidReflowState.mComputedWidth = aAvailableWidth;
kidReflowState.mComputedHeight = aAvailableHeight;
// ensure we start off hidden
if (aReflowState.reason == eReflowReason_Initial) {
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nsIView* view = mDropdownFrame->GetView();
nsIViewManager* viewManager = view->GetViewManager();
viewManager->SetViewVisibility(view, nsViewVisibility_kHide);
nsRect emptyRect(0, 0, 0, 0);
viewManager->ResizeView(view, emptyRect);
}
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// Allow the child to move/size/change-visibility its view if it's currently
// dropped down
PRInt32 flags = NS_FRAME_NO_MOVE_VIEW | NS_FRAME_NO_VISIBILITY | NS_FRAME_NO_SIZE_VIEW;
if (mDroppedDown) {
flags = 0;
}
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nsRect rect = aFrame->GetRect();
nsresult rv = ReflowChild(aFrame, aPresContext, aDesiredSize, kidReflowState,
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rect.x, rect.y, flags, aStatus);
// Set the child's width and height to it's desired size
FinishReflowChild(aFrame, aPresContext, &kidReflowState, aDesiredSize,
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rect.x, rect.y, flags);
return rv;
}
// Resize the child button frame to the specified size.
void
nsComboboxControlFrame::SetButtonFrameSize(const nsSize& aSize)
{
// Check that the child frame being resized is an nsGfxButtonControlFrame.
if (mButtonFrame->GetType() == nsLayoutAtoms::gfxButtonControlFrame) {
NS_STATIC_CAST(nsGfxButtonControlFrame*, mButtonFrame)->SetSuggestedSize(aSize);
} else {
// This function should never be called with another frame type.
NS_NOTREACHED("Wrong type in SetButtonFrameSize");
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}
}
nsresult
nsComboboxControlFrame::GetPrimaryComboFrame(nsPresContext* aPresContext, nsIContent* aContent, nsIFrame** aFrame)
{
// Get the primary frame from the presentation shell.
nsIPresShell *presShell = aPresContext->GetPresShell();
if (presShell) {
*aFrame = presShell->GetPrimaryFrameFor(aContent);
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}
return NS_OK;
}
nsresult
nsComboboxControlFrame::PositionDropdown(nsPresContext* aPresContext,
nscoord aHeight,
nsRect aAbsoluteTwipsRect,
nsRect aAbsolutePixelRect)
{
// 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.
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// 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.
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// Use the height calculated for the area frame so it includes both
// the display and button heights.
nsresult rv = NS_OK;
nscoord dropdownYOffset = aHeight;
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// XXX: Enable this code to debug popping up above the display frame, rather than below it
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nsRect dropdownRect = mDropdownFrame->GetRect();
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nscoord screenHeightInPixels = 0;
if (NS_SUCCEEDED(nsFormControlFrame::GetScreenHeight(aPresContext, screenHeightInPixels))) {
// Get the height of the dropdown list in pixels.
float t2p;
t2p = aPresContext->TwipsToPixels();
nscoord absoluteDropDownHeight = NSTwipsToIntPixels(dropdownRect.height, t2p);
// Check to see if the drop-down list will go offscreen
if (NS_SUCCEEDED(rv) && ((aAbsolutePixelRect.y + aAbsolutePixelRect.height + absoluteDropDownHeight) > screenHeightInPixels)) {
// move the dropdown list up
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dropdownYOffset = - (dropdownRect.height);
}
}
dropdownRect.x = 0;
dropdownRect.y = dropdownYOffset;
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mDropdownFrame->SetRect(dropdownRect);
return rv;
}
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////////////////////////////////////////////////////////////////
// Experimental Reflow
////////////////////////////////////////////////////////////////
#if defined(DO_NEW_REFLOW) || defined(DO_REFLOW_COUNTER)
//---------------------------------------------------------
// Returns the nsIDOMHTMLOptionElement for a given index
// in the select's collection
//---------------------------------------------------------
static nsIDOMHTMLOptionElement*
GetOption(nsIDOMHTMLOptionsCollection& aCollection, PRInt32 aIndex)
{
nsIDOMNode* node = nsnull;
if (NS_SUCCEEDED(aCollection.Item(aIndex, &node))) {
if (nsnull != node) {
nsIDOMHTMLOptionElement* option = nsnull;
node->QueryInterface(NS_GET_IID(nsIDOMHTMLOptionElement), (void**)&option);
NS_RELEASE(node);
return option;
}
}
return nsnull;
}
//---------------------------------------------------------
// for a given piece of content it returns nsIDOMHTMLSelectElement object
// or null
//---------------------------------------------------------
static nsIDOMHTMLSelectElement*
GetSelect(nsIContent * aContent)
{
nsIDOMHTMLSelectElement* selectElement = nsnull;
nsresult result = aContent->QueryInterface(NS_GET_IID(nsIDOMHTMLSelectElement),
(void**)&selectElement);
if (NS_SUCCEEDED(result) && selectElement) {
return selectElement;
} else {
return nsnull;
}
}
//---------------------------------------------------------
//---------------------------------------------------------
// This returns the collection for nsIDOMHTMLSelectElement or
// the nsIContent object is the select is null (AddRefs)
//---------------------------------------------------------
static nsIDOMHTMLOptionsCollection*
GetOptions(nsIContent * aContent, nsIDOMHTMLSelectElement* aSelect = nsnull)
{
nsIDOMHTMLOptionsCollection* options = nsnull;
if (!aSelect) {
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement = getter_AddRefs(GetSelect(aContent));
if (selectElement) {
selectElement->GetOptions(&options); // AddRefs (1)
}
} else {
aSelect->GetOptions(&options); // AddRefs (1)
}
return options;
}
#ifdef DO_NEW_REFLOW
NS_IMETHODIMP
nsComboboxControlFrame::ReflowItems(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize)
{
//printf("*****************\n");
nscoord visibleHeight = 0;
nsCOMPtr<nsIFontMetrics> fontMet;
nsresult res = nsFormControlHelper::GetFrameFontFM(mDisplayFrame, getter_AddRefs(fontMet));
if (fontMet) {
fontMet->GetHeight(visibleHeight);
}
nsAutoString maxStr;
nscoord maxWidth = 0;
//nsIRenderingContext * rc = aReflowState.rendContext;
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = getter_AddRefs(GetOptions(mContent));
if (options) {
PRUint32 numOptions;
options->GetLength(&numOptions);
//printf("--- Num of Items %d ---\n", numOptions);
for (PRUint32 i=0;i<numOptions;i++) {
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement = getter_AddRefs(GetOption(*options, i));
if (optionElement) {
nsAutoString text;
optionElement->GetLabel(text);
if (text.IsEmpty() &&
NS_SUCCEEDED(optionElement->GetText(text))) {
nscoord width;
aReflowState.rendContext->GetWidth(text, width);
if (width > maxWidth) {
maxStr = text;
maxWidth = width;
}
//maxWidth = PR_MAX(width, maxWidth);
//printf("[%d] - %d %s \n", i, width, NS_LossyConvertUCS2toASCII(text).get());
}
}
}
}
if (maxWidth == 0) {
maxWidth = 11 * 15;
}
char * str = ToNewCString(maxStr);
printf("id: %d maxWidth %d [%s]\n", mReflowId, maxWidth, str);
delete [] str;
// get the borderPadding for the display area
nsMargin dspBorderPadding(0, 0, 0, 0);
mDisplayFrame->CalcBorderPadding(dspBorderPadding);
nscoord frmWidth = maxWidth+dspBorderPadding.left+dspBorderPadding.right+
aReflowState.mComputedBorderPadding.left + aReflowState.mComputedBorderPadding.right;
nscoord frmHeight = visibleHeight+dspBorderPadding.top+dspBorderPadding.bottom+
aReflowState.mComputedBorderPadding.top + aReflowState.mComputedBorderPadding.bottom;
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#if 0
aDesiredSize.width = frmWidth;
aDesiredSize.height = frmHeight;
#else
printf("Size frm:%d,%d DS:%d,%d DIF:%d,%d(tp) %d,%d(px)\n",
frmWidth, frmHeight,
aDesiredSize.width, aDesiredSize.height,
frmWidth-aDesiredSize.width, frmHeight-aDesiredSize.height,
(frmWidth-aDesiredSize.width)/15, (frmHeight-aDesiredSize.height)/15);
#endif
return NS_OK;
}
#endif
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#endif
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//------------------------------------------------------------------
// This Method reflow just the contents of the ComboBox
// The contents are a Block frame containing a Text Frame - This is the display area
// and then the GfxButton - The dropdown button
//--------------------------------------------------------------------------
void
nsComboboxControlFrame::ReflowCombobox(nsPresContext * aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize,
nsReflowStatus& aStatus,
nsIFrame * aDisplayFrame,
nscoord& aDisplayWidth,
nscoord aBtnWidth,
const nsMargin& aBorderPadding,
nscoord aFallBackHgt,
PRBool aCheckHeight)
{
// start out by using the cached height
// XXX later this will change when we better handle constrained height
nscoord dispHeight = mCacheSize.height - aBorderPadding.top - aBorderPadding.bottom;
nscoord dispWidth = aDisplayWidth;
REFLOW_NOISY_MSG3("+++1 AdjustCombo DW:%d DH:%d ", PX(dispWidth), PX(dispHeight));
REFLOW_NOISY_MSG3("BW:%d BH:%d ", PX(aBtnWidth), PX(dispHeight));
REFLOW_NOISY_MSG3("mCacheSize.height:%d - %d\n", PX(mCacheSize.height), PX((aBorderPadding.top + aBorderPadding.bottom)));
// get the border and padding for the DisplayArea (block frame & textframe)
nsMargin dspBorderPadding(0, 0, 0, 0);
mDisplayFrame->CalcBorderPadding(dspBorderPadding);
// adjust the height
if (mCacheSize.height == kSizeNotSet) {
if (aFallBackHgt == kSizeNotSet) {
NS_ASSERTION(aFallBackHgt != kSizeNotSet, "Fallback can't be kSizeNotSet when mCacheSize.height == kSizeNotSet");
} else {
dispHeight = aFallBackHgt;
REFLOW_NOISY_MSG2("+++3 Adding (dspBorderPadding.top + dspBorderPadding.bottom): %d\n", (dspBorderPadding.top + dspBorderPadding.bottom));
dispHeight += (dspBorderPadding.top + dspBorderPadding.bottom);
}
}
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// Fix for Bug 58220 (part of it)
// make sure we size correctly if the CSS width is set to something really small like 0, 1, or 2 pixels
nscoord computedWidth = aReflowState.mComputedWidth + aBorderPadding.left + aBorderPadding.right;
if ((aReflowState.mComputedWidth != NS_UNCONSTRAINEDSIZE && computedWidth <= 0) || aReflowState.mComputedWidth == 0) {
nsRect buttonRect(0,0,0,0);
nsRect displayRect(0,0,0,0);
aBtnWidth = 0;
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aDisplayFrame->SetRect(displayRect);
mButtonFrame->SetRect(buttonRect);
SetButtonFrameSize(nsSize(aBtnWidth, aDesiredSize.height));
aDesiredSize.width = 0;
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aDesiredSize.height = dispHeight + aBorderPadding.top + aBorderPadding.bottom;
// XXX What about ascent and descent?
return;
}
REFLOW_NOISY_MSG3("+++2 AdjustCombo DW:%d DH:%d ", PX(dispWidth), PX(dispHeight));
REFLOW_NOISY_MSG3(" BW:%d BH:%d\n", PX(aBtnWidth), PX(dispHeight));
// This sets the button to be a specific size
// so no matter what it reflows at these values
SetButtonFrameSize(nsSize(aBtnWidth, dispHeight));
#ifdef FIX_FOR_BUG_53259
// Make sure we obey min/max-width and min/max-height
if (dispWidth > aReflowState.mComputedMaxWidth) {
dispWidth = aReflowState.mComputedMaxWidth - aBorderPadding.left - aBorderPadding.right;
}
if (dispWidth < aReflowState.mComputedMinWidth) {
dispWidth = aReflowState.mComputedMinWidth - aBorderPadding.left - aBorderPadding.right;
}
if (dispHeight > aReflowState.mComputedMaxHeight) {
dispHeight = aReflowState.mComputedMaxHeight - aBorderPadding.top - aBorderPadding.bottom;
}
if (dispHeight < aReflowState.mComputedMinHeight) {
dispHeight = aReflowState.mComputedMinHeight - aBorderPadding.top - aBorderPadding.bottom;
}
#endif
// Make sure we get the reflow reason right. If an incremental
// reflow arrives that's targeted directly at the top-level combobox
// frame, then we can't pass it down to the children ``as is'':
// we're the last frame in the reflow command's chain. So, convert
// it to a resize reflow.
nsReflowReason reason = aReflowState.reason;
if (reason == eReflowReason_Incremental) {
if (aReflowState.path->mReflowCommand)
reason = eReflowReason_Resize;
}
// now that we know what the overall display width & height will be
// set up a new reflow state and reflow the area frame at that size
nsSize availSize(dispWidth + aBorderPadding.left + aBorderPadding.right,
dispHeight + aBorderPadding.top + aBorderPadding.bottom);
nsHTMLReflowState kidReflowState(aReflowState);
kidReflowState.availableWidth = availSize.width;
kidReflowState.availableHeight = availSize.height;
kidReflowState.mComputedWidth = dispWidth;
kidReflowState.mComputedHeight = dispHeight;
kidReflowState.reason = reason;
#ifdef IBMBIDI
const nsStyleVisibility* vis = GetStyleVisibility();
// M14 didn't calculate the RightEdge in the reflow
// Unless we set the width to some thing other than unrestricted
// the code changed this may not be the best place to put it
// in this->Reflow like this :
//
// Reflow display + button
// nsAreaFrame::Reflow(aPresContext, aDesiredSize, firstPassState, aStatus);
if (vis->mDirection == NS_STYLE_DIRECTION_RTL)
{
kidReflowState.mComputedWidth = 0;
}
#endif // IBMBIDI
// do reflow
nsAreaFrame::Reflow(aPresContext, aDesiredSize, kidReflowState, aStatus);
/////////////////////////////////////////////////////////
// The DisplayFrame is a Block frame containing a TextFrame
// and it is completely anonymous, so we must manually reflow it
nsHTMLReflowMetrics txtKidSize(PR_TRUE);
nsSize txtAvailSize(dispWidth - aBtnWidth, dispHeight);
nsHTMLReflowState txtKidReflowState(aPresContext, aReflowState, aDisplayFrame, txtAvailSize, reason);
aDisplayFrame->WillReflow(aPresContext);
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//aDisplayFrame->SetPosition(nsPoint(dspBorderPadding.left + aBorderPadding.left, dspBorderPadding.top + aBorderPadding.top));
aDisplayFrame->SetPosition(nsPoint(aBorderPadding.left, aBorderPadding.top));
nsAreaFrame::PositionFrameView(aDisplayFrame);
nsReflowStatus status;
nsresult rv = aDisplayFrame->Reflow(aPresContext, txtKidSize, txtKidReflowState, status);
if (NS_FAILED(rv)) return;
/////////////////////////////////////////////////////////
// If we are Constrained then the AreaFrame Reflow is the correct size
// if we are unconstrained then
//if (aReflowState.mComputedWidth == NS_UNCONSTRAINEDSIZE) {
// aDesiredSize.width += txtKidSize.width;
//}
// Apparently, XUL lays out differently than HTML
// (the code above works for HTML and not XUL),
// so instead of using the above calculation
// I just set it to what it should be.
aDesiredSize.width = availSize.width;
//aDesiredSize.height = availSize.height;
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// now we need to adjust layout, because the AreaFrame
// doesn't position things exactly where we want them
nscoord insideHeight = aDesiredSize.height - aBorderPadding.top - aBorderPadding.bottom;
// If the css width has been set to something very small
//i.e. smaller than the dropdown button, set the button's width to zero
if (aBtnWidth > dispWidth) {
aBtnWidth = 0;
}
// set the display rect to be left justifed and
// fills the entire area except the button
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nscoord x = aBorderPadding.left;
nsRect displayRect(x, aBorderPadding.top, PR_MAX(dispWidth - aBtnWidth, 0), insideHeight);
aDisplayFrame->SetRect(displayRect);
x += displayRect.width;
// right justify the button
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nsRect buttonRect(x, aBorderPadding.top, aBtnWidth, insideHeight);
#ifdef IBMBIDI
if (vis->mDirection == NS_STYLE_DIRECTION_RTL)
{
if (buttonRect.x > displayRect.x)
{
buttonRect.x = displayRect.x;
displayRect.x += buttonRect.width;
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aDisplayFrame->SetRect(displayRect);
}
}
#endif // IBMBIDI
mButtonFrame->SetRect(buttonRect);
// since we have changed the height of the button
// make sure it has these new values
SetButtonFrameSize(nsSize(aBtnWidth, aDesiredSize.height));
// This is a last minute adjustment, if the CSS width was set and
// we calculated it to be a little big, then make sure we are no bigger the computed size
// this only comes into play when the css width has been set to something smaller than
// the dropdown arrow
if (aReflowState.mComputedWidth != NS_UNCONSTRAINEDSIZE && aDesiredSize.width > computedWidth) {
aDesiredSize.width = computedWidth;
}
REFLOW_NOISY_MSG3("**AdjustCombobox - Reflow: WW: %d HH: %d\n", aDesiredSize.width, aDesiredSize.height);
if (aDesiredSize.mComputeMEW) {
aDesiredSize.SetMEWToActualWidth(aReflowState.mStylePosition->mWidth.GetUnit());
}
aDesiredSize.ascent =
txtKidSize.ascent + aReflowState.mComputedBorderPadding.top;
aDesiredSize.descent = aDesiredSize.height - aDesiredSize.ascent;
// Now cache the available height as our height without border and padding
// This sets up the optimization for if a new available width comes in and we are equal or
// less than it we can bail
if (aDesiredSize.width != mCacheSize.width || aDesiredSize.height != mCacheSize.height) {
if (aReflowState.availableWidth != NS_UNCONSTRAINEDSIZE) {
mCachedAvailableSize.width = aDesiredSize.width - (aBorderPadding.left + aBorderPadding.right);
}
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
mCachedAvailableSize.height = aDesiredSize.height - (aBorderPadding.top + aBorderPadding.bottom);
}
nsFormControlFrame::SetupCachedSizes(mCacheSize, mCachedAscent,
mCachedMaxElementWidth, aDesiredSize);
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}
///////////////////////////////////////////////////////////////////
// This is an experimental reflow that is turned off in the build
#ifdef DO_NEW_REFLOW
ReflowItems(aPresContext, aReflowState, aDesiredSize);
#endif
///////////////////////////////////////////////////////////////////
}
//----------------------------------------------------------
//
//----------------------------------------------------------
#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
//-------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsComboboxControlFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
aStatus = NS_FRAME_COMPLETE;
REFLOW_COUNTER_REQUEST();
#ifdef DO_REFLOW_DEBUG
printf("-------------Starting Combobox Reflow ----------------------------\n");
printf("%p ** Id: %d nsCCF::Reflow %d R: ", this, mReflowId, myCounter++);
switch (aReflowState.reason) {
case eReflowReason_Initial:
printf("Ini");break;
case eReflowReason_Incremental:
printf("Inc");break;
case eReflowReason_Resize:
printf("Rsz");break;
case eReflowReason_StyleChange:
printf("Sty");break;
case eReflowReason_Dirty:
printf("Drt ");
break;
default:printf("<unknown>%d", aReflowState.reason);break;
}
printSize("AW", aReflowState.availableWidth);
printSize("AH", aReflowState.availableHeight);
printSize("CW", aReflowState.mComputedWidth);
printSize("CH", aReflowState.mComputedHeight);
nsCOMPtr<nsIDOMHTMLOptionsCollection> optionsTemp = getter_AddRefs(GetOptions(mContent));
PRUint32 numOptions;
optionsTemp->GetLength(&numOptions);
printSize("NO", (nscoord)numOptions);
printf(" *\n");
#endif
PRBool bailOnWidth;
PRBool bailOnHeight;
// Do initial check to see if we can bail out
// If it is an Initial or Incremental Reflow we never bail out here
// XXX right now we only bail if the width meets the criteria
//
// We bail:
// if mComputedWidth == NS_UNCONSTRAINEDSIZE and
// availableWidth == NS_UNCONSTRAINEDSIZE and
// we have cached an available size
//
// We bail:
// if mComputedWidth == NS_UNCONSTRAINEDSIZE and
// availableWidth != NS_UNCONSTRAINEDSIZE and
// availableWidth minus its border equals our cached available size
//
// We bail:
// if mComputedWidth != NS_UNCONSTRAINEDSIZE and
// cached availableSize.width == aReflowState.mComputedWidth and
// cached AvailableSize.width == aCacheSize.width
//
// NOTE: this returns whether we are doing an Incremental reflow
nsFormControlFrame::SkipResizeReflow(mCacheSize,
mCachedAscent,
mCachedMaxElementWidth,
mCachedAvailableSize,
aDesiredSize, aReflowState,
aStatus,
bailOnWidth, bailOnHeight);
if (bailOnWidth) {
#ifdef DO_REFLOW_DEBUG // check or size
nsMargin borderPadding(0, 0, 0, 0);
CalcBorderPadding(borderPadding);
UNCONSTRAINED_CHECK();
#endif
REFLOW_DEBUG_MSG3("^** Done nsCCF DW: %d DH: %d\n\n", PX(aDesiredSize.width), PX(aDesiredSize.height));
NS_ASSERTION(aDesiredSize.width != kSizeNotSet, "aDesiredSize.width != kSizeNotSet");
NS_ASSERTION(aDesiredSize.height != kSizeNotSet, "aDesiredSize.height != kSizeNotSet");
aDesiredSize.mOverflowArea.x = 0;
aDesiredSize.mOverflowArea.y = 0;
aDesiredSize.mOverflowArea.width = aDesiredSize.width;
aDesiredSize.mOverflowArea.height = aDesiredSize.height;
FinishAndStoreOverflow(&aDesiredSize);
return NS_OK;
}
// Go get all of the important frame
nsresult rv = NS_OK;
// Don't try to do any special sizing and positioning unless all of the frames
// have been created.
if ((nsnull == mDisplayFrame) ||
(nsnull == mButtonFrame) ||
(nsnull == mDropdownFrame))
{
// Since combobox frames are missing just do a normal area frame reflow
return nsAreaFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
}
// Make sure the displayed text is the same as the selected option, bug 297389.
PRInt32 selectedIndex;
nsAutoString selectedOptionText;
if (!mDroppedDown) {
mListControlFrame->GetSelectedIndex(&selectedIndex);
}
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);
}
// We should cache this instead getting it everytime
// the default size of the of scrollbar
// that will be the default width of the dropdown button
// the height will be the height of the text
float w, h;
// Get the width in Device pixels times p2t
aPresContext->DeviceContext()->GetScrollBarDimensions(w, h);
nscoord scrollbarWidth = NSToCoordRound(w);
// set up a new reflow state for use throughout
nsHTMLReflowState firstPassState(aReflowState);
nsHTMLReflowMetrics dropdownDesiredSize(nsnull);
// Check to see if this a fully unconstrained reflow
PRBool fullyUnconstrained = firstPassState.mComputedWidth == NS_UNCONSTRAINEDSIZE;
PRBool forceReflow = PR_FALSE;
// Only reflow the display and button
// if they are the target of the incremental reflow, unless they change size.
if (eReflowReason_Incremental == aReflowState.reason) {
nsHTMLReflowCommand *command = firstPassState.path->mReflowCommand;
// Check to see if we are the target of the Incremental Reflow
if (command) {
// We need to check here to see if we can get away with just reflowing
// the combobox and not the dropdown
REFLOW_DEBUG_MSG("-----------------Target is Combobox------------\n");
// If the mComputedWidth matches our cached display width
// then we get away with bailing out
PRBool doFullReflow = firstPassState.mComputedWidth != NS_UNCONSTRAINEDSIZE &&
firstPassState.mComputedWidth != mItemDisplayWidth;
if (!doFullReflow) {
// OK, so we got lucky and the size didn't change
// so do a simple reflow and bail out
REFLOW_DEBUG_MSG("------------Reflowing AreaFrame and bailing----\n\n");
ReflowCombobox(aPresContext, firstPassState, aDesiredSize, aStatus,
mDisplayFrame, mItemDisplayWidth,
scrollbarWidth, aReflowState.mComputedBorderPadding);
REFLOW_COUNTER();
UNCONSTRAINED_CHECK();
REFLOW_DEBUG_MSG3("&** Done nsCCF DW: %d DH: %d\n\n", PX(aDesiredSize.width), PX(aDesiredSize.height));
NS_ASSERTION(aDesiredSize.width != kSizeNotSet, "aDesiredSize.width != kSizeNotSet");
NS_ASSERTION(aDesiredSize.height != kSizeNotSet, "aDesiredSize.height != kSizeNotSet");
aDesiredSize.mOverflowArea.x = 0;
aDesiredSize.mOverflowArea.y = 0;
aDesiredSize.mOverflowArea.width = aDesiredSize.width;
aDesiredSize.mOverflowArea.height = aDesiredSize.height;
}
else {
// Nope, something changed that affected our size
// so we need to do a full reflow and resize ourself
REFLOW_DEBUG_MSG("------------Do Full Reflow----\n\n");
firstPassState.reason = eReflowReason_StyleChange;
firstPassState.path = nsnull;
forceReflow = PR_TRUE;
}
}
// See if any of the children are targets, as well.
nsReflowPath::iterator iter = aReflowState.path->FirstChild();
nsReflowPath::iterator end = aReflowState.path->EndChildren();
for ( ; iter != end; ++iter) {
// Now, see if our target is the dropdown
// If so, maybe an items was added or some style changed etc.
// OR
// We get an Incremental reflow on the dropdown when it is being
// shown or hidden.
if (*iter == mDropdownFrame) {
REFLOW_DEBUG_MSG("---------Target is Dropdown (Clearing Unc DD Size)---\n");
// Nope, we were unlucky so now we do a full reflow
mCachedUncDropdownSize.width = kSizeNotSet;
mCachedUncDropdownSize.height = kSizeNotSet;
REFLOW_DEBUG_MSG("---- Doing Full Reflow\n");
// This is an incremental reflow targeted at the dropdown list
// and it didn't have anything to do with being show or hidden.
//
// The incremental reflow will not get to the dropdown list
// because it is in the "popup" list
// when this flow of control drops out of this if it will do a reflow
// on the AreaFrame which SHOULD make it get tothe drop down
// except that it is in the popup list, so we have it reflowed as
// a StyleChange, this is not as efficient as doing an Incremental
//
// At this point we want to by pass the reflow optimization in the dropdown
// because we aren't why it is getting an incremental reflow, but we do
// know that it needs to be resized or restyled
//mListControlFrame->SetOverrideReflowOptimization(PR_TRUE);
} else if (*iter == mDisplayFrame || *iter == mButtonFrame) {
REFLOW_DEBUG_MSG2("-----------------Target is %s------------\n", (*iter == mDisplayFrame?"DisplayItem Frame":"DropDown Btn Frame"));
// The incremental reflow is targeted at either the block or the button
REFLOW_DEBUG_MSG("---- Doing AreaFrame Reflow and then bailing out\n");
// Do simple reflow and bail out
ReflowCombobox(aPresContext, firstPassState, aDesiredSize, aStatus,
mDisplayFrame, mItemDisplayWidth, scrollbarWidth,
aReflowState.mComputedBorderPadding,
kSizeNotSet, PR_TRUE);
REFLOW_DEBUG_MSG3("+** Done nsCCF DW: %d DH: %d\n\n", PX(aDesiredSize.width), PX(aDesiredSize.height));
REFLOW_COUNTER();
UNCONSTRAINED_CHECK();
NS_ASSERTION(aDesiredSize.width != kSizeNotSet, "aDesiredSize.width != kSizeNotSet");
NS_ASSERTION(aDesiredSize.height != kSizeNotSet, "aDesiredSize.height != kSizeNotSet");
aDesiredSize.mOverflowArea.x = 0;
aDesiredSize.mOverflowArea.y = 0;
aDesiredSize.mOverflowArea.width = aDesiredSize.width;
aDesiredSize.mOverflowArea.height = aDesiredSize.height;
continue;
} else {
nsIFrame * plainLstFrame;
if (NS_SUCCEEDED(mListControlFrame->QueryInterface(NS_GET_IID(nsIFrame), (void**)&plainLstFrame))) {
nsIFrame * frame = plainLstFrame->GetFirstChild(nsnull);
nsIScrollableFrame * scrollFrame;
if (NS_SUCCEEDED(frame->QueryInterface(NS_GET_IID(nsIScrollableFrame), (void**)&scrollFrame))) {
plainLstFrame->Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
aDesiredSize.width = mCacheSize.width;
aDesiredSize.height = mCacheSize.height;
aDesiredSize.ascent = mCachedAscent;
aDesiredSize.descent = aDesiredSize.height - aDesiredSize.ascent;
if (aDesiredSize.mComputeMEW) {
aDesiredSize.mMaxElementWidth = mCachedMaxElementWidth;
}
NS_ASSERTION(aDesiredSize.width != kSizeNotSet, "aDesiredSize.width != kSizeNotSet");
NS_ASSERTION(aDesiredSize.height != kSizeNotSet, "aDesiredSize.height != kSizeNotSet");
aDesiredSize.mOverflowArea.x = 0;
aDesiredSize.mOverflowArea.y = 0;
aDesiredSize.mOverflowArea.width = aDesiredSize.width;
aDesiredSize.mOverflowArea.height = aDesiredSize.height;
continue;
}
}
// Here the target of the reflow was a child of the dropdown list
// so we must do a full reflow
REFLOW_DEBUG_MSG("-----------------Target is Dropdown's Child (Option Item)------------\n");
REFLOW_DEBUG_MSG("---- Doing Reflow as StyleChange\n");
}
firstPassState.reason = eReflowReason_StyleChange;
firstPassState.path = nsnull;
mListControlFrame->SetOverrideReflowOptimization(PR_TRUE);
forceReflow = PR_TRUE;
}
}
#ifdef IBMBIDI
else if (eReflowReason_StyleChange == aReflowState.reason) {
forceReflow = PR_TRUE;
}
#endif // IBMBIDI
// Here is another special optimization
// Only reflow the dropdown if it has never been reflowed unconstrained
//
// Or someone up above here may want to force it to be reflowed
// by setting one or both of these to kSizeNotSet
if ((mCachedUncDropdownSize.width == kSizeNotSet &&
mCachedUncDropdownSize.height == kSizeNotSet) || forceReflow) {
REFLOW_DEBUG_MSG3("---Re %d,%d\n", PX(mCachedUncDropdownSize.width), PX(mCachedUncDropdownSize.height));
// Tell it we are doing the first pass, which means it will
// do the unconstained reflow and skip the second reflow this time around
nsListControlFrame * lcf = NS_STATIC_CAST(nsListControlFrame*, mDropdownFrame);
lcf->SetPassId(1);
// A width has not been specified for the select so size the display area
// to match the width of the longest item in the drop-down list. The dropdown
// list has already been reflowed and sized to shrink around its contents above.
ReflowComboChildFrame(mDropdownFrame, aPresContext, dropdownDesiredSize, firstPassState,
aStatus, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
lcf->SetPassId(0); // reset it back
if (forceReflow) {
mCachedUncDropdownSize.width = dropdownDesiredSize.width;
mCachedUncDropdownSize.height = dropdownDesiredSize.height;
}
} else {
// Here we pretended we did an unconstrained reflow
// so we set the cached values and continue on
REFLOW_DEBUG_MSG3("--- Using Cached ListBox Size %d,%d\n", PX(mCachedUncDropdownSize.width), PX(mCachedUncDropdownSize.height));
dropdownDesiredSize.width = mCachedUncDropdownSize.width;
dropdownDesiredSize.height = mCachedUncDropdownSize.height;
}
/////////////////////////////////////////////////////////////////////////
// XXX - I need to clean this nect part up a little it is very redundant
// Check here to if this is a mComputed unconstrained reflow
PRBool computedUnconstrained = firstPassState.mComputedWidth == NS_UNCONSTRAINEDSIZE;
if (computedUnconstrained && !forceReflow) {
// Because Incremental reflows aren't actually getting to the dropdown
// we cache the size from when it did a fully unconstrained reflow
// we then check to see if the size changed at all,
// if not then bail out we don't need to worry
if (mCachedUncDropdownSize.width == kSizeNotSet && mCachedUncDropdownSize.height == kSizeNotSet) {
mCachedUncDropdownSize.width = dropdownDesiredSize.width;
mCachedUncDropdownSize.height = dropdownDesiredSize.height;
REFLOW_DEBUG_MSG3("---1 Caching mCachedUncDropdownSize %d,%d\n", PX(mCachedUncDropdownSize.width), PX(mCachedUncDropdownSize.height));
} else if (mCachedUncDropdownSize.width == dropdownDesiredSize.width &&
mCachedUncDropdownSize.height == dropdownDesiredSize.height) {
if (mCachedUncComboSize.width != kSizeNotSet && mCachedUncComboSize.height != kSizeNotSet) {
REFLOW_DEBUG_MSG3("--- Bailing because of mCachedUncDropdownSize %d,%d\n\n", PX(mCachedUncDropdownSize.width), PX(mCachedUncDropdownSize.height));
aDesiredSize.width = mCachedUncComboSize.width;
aDesiredSize.height = mCachedUncComboSize.height;
aDesiredSize.ascent = mCachedAscent;
aDesiredSize.descent = aDesiredSize.height - aDesiredSize.ascent;
if (aDesiredSize.mComputeMEW) {
aDesiredSize.mMaxElementWidth = mCachedMaxElementWidth;
}
UNCONSTRAINED_CHECK();
REFLOW_DEBUG_MSG3("#** Done nsCCF DW: %d DH: %d\n\n", PX(aDesiredSize.width), PX(aDesiredSize.height));
NS_ASSERTION(aDesiredSize.width != kSizeNotSet, "aDesiredSize.width != kSizeNotSet");
NS_ASSERTION(aDesiredSize.height != kSizeNotSet, "aDesiredSize.height != kSizeNotSet");
aDesiredSize.mOverflowArea.x = 0;
aDesiredSize.mOverflowArea.y = 0;
aDesiredSize.mOverflowArea.width = aDesiredSize.width;
aDesiredSize.mOverflowArea.height = aDesiredSize.height;
FinishAndStoreOverflow(&aDesiredSize);
return NS_OK;
}
} else {
mCachedUncDropdownSize.width = dropdownDesiredSize.width;
mCachedUncDropdownSize.height = dropdownDesiredSize.height;
}
}
// clean up stops here
/////////////////////////////////////////////////////////////////////////
// So this point we know we flowed the dropdown unconstrained
// now we get to figure out how big we need to be and
//
// We don't reflow the combobox here at the new size
// we cache its new size and reflow it on the dropdown
nsSize size;
PRInt32 length = 0;
mListControlFrame->GetNumberOfOptions(&length);
// dropdownRect will hold the content size (minus border padding)
// for the display area
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nsRect dropdownRect = mDropdownFrame->GetRect();
if (eReflowReason_Resize == aReflowState.reason) {
dropdownRect.Deflate(aReflowState.mComputedBorderPadding);
}
// Get maximum size of the largest item in the dropdown
// The height of the display frame will be that height
// the width will be the same as
// the dropdown width (minus its borderPadding) OR
// a caculation off the mComputedWidth from reflow
mListControlFrame->GetMaximumSize(size);
// the variable "size" will now be
// the default size of the dropdown btn
if (scrollbarWidth > 0) {
size.width = scrollbarWidth;
}
// Get the border and padding for the dropdown
nsMargin dropBorderPadding(0, 0, 0, 0);
mDropdownFrame->CalcBorderPadding(dropBorderPadding);
// get the borderPadding for the display area
nsMargin dspBorderPadding(0, 0, 0, 0);
mDisplayFrame->CalcBorderPadding(dspBorderPadding);
// Subtract dropdown's borderPadding from the width of the dropdown rect
// to get the size of the content area
//
// the height will come from the mDisplayFrame's height
// declare a size for the item display frame
//Set the desired size for the button and display frame
if (NS_UNCONSTRAINEDSIZE == firstPassState.mComputedWidth) {
REFLOW_DEBUG_MSG("Unconstrained.....\n");
REFLOW_DEBUG_MSG4("*B mItemDisplayWidth %d dropdownRect.width:%d dropdownRect.w+h %d\n", PX(mItemDisplayWidth), PX(dropdownRect.width), PX((dropBorderPadding.left + dropBorderPadding.right)));
// Start with the dropdown rect's width (at this stage, it's the
// natural width of the content in the list, i.e., the width of
// the widest content, i.e. the preferred width for the display
// frame) and add room for the button, which is assumed to match
// the width of the scrollbar (note that the scrollbarWidth is
// passed as aBtnWidth to ReflowCombobox). (When the dropdown was
// an nsScrollFrame the scrollbar width seems to have already been
// added to its unconstrained width.)
mItemDisplayWidth = dropdownRect.width + scrollbarWidth;
REFLOW_DEBUG_MSG2("* mItemDisplayWidth %d\n", PX(mItemDisplayWidth));
// mItemDisplayWidth must be the size of the "display" frame including it's
// border and padding, but NOT including the comboboxes border and padding
mItemDisplayWidth += dspBorderPadding.left + dspBorderPadding.right;
mItemDisplayWidth -= aReflowState.mComputedBorderPadding.left + aReflowState.mComputedBorderPadding.right;
REFLOW_DEBUG_MSG2("*A mItemDisplayWidth %d\n", PX(mItemDisplayWidth));
} else {
REFLOW_DEBUG_MSG("Constrained.....\n");
if (firstPassState.mComputedWidth > 0) {
// Compute the display item's width from reflow's mComputedWidth
// mComputedWidth has already excluded border and padding
// so subtract off the button's size
REFLOW_DEBUG_MSG3("B mItemDisplayWidth %d %d\n", PX(mItemDisplayWidth), PX(dspBorderPadding.right));
// Display Frame's width comes from the mComputedWidth and therefore implies that it
// includes the "display" frame's border and padding.
mItemDisplayWidth = firstPassState.mComputedWidth;
REFLOW_DEBUG_MSG2("A mItemDisplayWidth %d\n", PX(mItemDisplayWidth));
REFLOW_DEBUG_MSG4("firstPassState.mComputedWidth %d - size.width %d dspBorderPadding.right %d\n", PX(firstPassState.mComputedWidth), PX(size.width), PX(dspBorderPadding.right));
}
}
// Fix for Bug 44788 (remove this comment later)
if (firstPassState.mComputedHeight > 0 && NS_UNCONSTRAINEDSIZE != firstPassState.mComputedHeight) {
size.height = firstPassState.mComputedHeight;
}
if (mCacheSize.height != size.height) {
// if the cached height is not equal to the current height,
// the cached height is reset.
mCacheSize.height = kSizeNotSet;
}
// this reflows and makes and last minute adjustments
ReflowCombobox(aPresContext, firstPassState, aDesiredSize, aStatus,
mDisplayFrame, mItemDisplayWidth, scrollbarWidth,
aReflowState.mComputedBorderPadding, size.height);
// The dropdown was reflowed UNCONSTRAINED before, now we need to reflow it
// so that all children match the desired width.
// The dropdown MUST always be either the same size as the combo or larger
// if necessary. Note that individual children can be narrower in case they
// are constrained by 'width', 'max-width' etc.
if (eReflowReason_Initial == firstPassState.reason) {
firstPassState.reason = eReflowReason_Resize;
}
REFLOW_DEBUG_MSG3("*** Reflowing ListBox to width: %d it was %d\n", PX(aDesiredSize.width), PX(dropdownDesiredSize.width));
// Tell it we are doing the second pass, which means we will skip
// doing the unconstained reflow, we already know that size
nsListControlFrame * lcf = NS_STATIC_CAST(nsListControlFrame*, mDropdownFrame);
lcf->SetPassId(2);
// Reflow the dropdown list to be
// MAX(width of the display + button, width of the widest option). bug 305705.
const nscoord availableWidth =
PR_MAX(aDesiredSize.width, dropdownDesiredSize.width -
aReflowState.mComputedBorderPadding.left -
aReflowState.mComputedBorderPadding.right);
ReflowComboChildFrame(mDropdownFrame, aPresContext, dropdownDesiredSize,
firstPassState, aStatus,
availableWidth, NS_UNCONSTRAINEDSIZE);
lcf->SetPassId(0);
// Set the max element size to be the same as the desired element size.
if (aDesiredSize.mComputeMEW) {
aDesiredSize.SetMEWToActualWidth(aReflowState.mStylePosition->mWidth.GetUnit());
}
#if 0
COMPARE_QUIRK_SIZE("nsComboboxControlFrame", 127, 22)
#endif
// cache the availabe size to be our desired size minus the borders
// this is so if our cached available size is ever equal to or less
// than the real available size we can bail out
if (aReflowState.availableWidth != NS_UNCONSTRAINEDSIZE) {
mCachedAvailableSize.width = aDesiredSize.width -
(aReflowState.mComputedBorderPadding.left +
aReflowState.mComputedBorderPadding.right);
}
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
mCachedAvailableSize.height = aDesiredSize.height -
(aReflowState.mComputedBorderPadding.top +
aReflowState.mComputedBorderPadding.bottom);
}
nsFormControlFrame::SetupCachedSizes(mCacheSize, mCachedAscent, mCachedMaxElementWidth, aDesiredSize);
REFLOW_DEBUG_MSG3("** Done nsCCF DW: %d DH: %d\n\n", PX(aDesiredSize.width), PX(aDesiredSize.height));
REFLOW_COUNTER();
UNCONSTRAINED_CHECK();
// If this was a fully unconstrained reflow we cache
// the combobox's unconstrained size
if (fullyUnconstrained) {
mCachedUncComboSize.width = aDesiredSize.width;
mCachedUncComboSize.height = aDesiredSize.height;
}
NS_ASSERTION(aDesiredSize.width != kSizeNotSet, "aDesiredSize.width != kSizeNotSet");
NS_ASSERTION(aDesiredSize.height != kSizeNotSet, "aDesiredSize.height != kSizeNotSet");
aDesiredSize.mOverflowArea.x = 0;
aDesiredSize.mOverflowArea.y = 0;
aDesiredSize.mOverflowArea.width = aDesiredSize.width;
aDesiredSize.mOverflowArea.height = aDesiredSize.height;
FinishAndStoreOverflow(&aDesiredSize);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return rv;
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}
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//--------------------------------------------------------------
nsIFrame*
nsComboboxControlFrame::GetFrameForPoint(const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer)
{
// The button is getting the hover events so...
// None of the children frames of the combobox get
// the events. (like the button frame), that way
// all event based style rules affect the combobox
// and not the any of the child frames. (The inability
// of the parent to be in the :hover state at the same
// time as its children is really a bug (#5693 / #33736)
// in the implementation of :hover.)
// It would be theoretically more elegant to check the
// children when not disabled, and then use event
// capturing. It would correctly handle situations (obscure!!)
// where the children were visible but the parent was not.
// Now the functionality of the OPTIONs depends on the SELECT
// being visible. Oh well...
return nsFrame::GetFrameForPoint(aPoint, aWhichLayer);
}
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//--------------------------------------------------------------
#ifdef NS_DEBUG
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NS_IMETHODIMP
nsComboboxControlFrame::GetFrameName(nsAString& aResult) const
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{
return MakeFrameName(NS_LITERAL_STRING("ComboboxControl"), aResult);
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}
#endif
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1999-01-18 18:14:00 +03:00
//----------------------------------------------------------------------
// nsIComboboxControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::ShowDropDown(PRBool aDoDropDown)
{
if (nsFormControlHelper::GetDisabled(mContent)) {
return NS_OK;
}
if (!mDroppedDown && aDoDropDown) {
if (mListControlFrame) {
mListControlFrame->SyncViewWithFrame();
}
ToggleList(GetPresContext());
return NS_OK;
} else if (mDroppedDown && !aDoDropDown) {
ToggleList(GetPresContext());
return NS_OK;
}
return NS_ERROR_FAILURE;
}
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NS_IMETHODIMP
nsComboboxControlFrame::SetDropDown(nsIFrame* aDropDownFrame)
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{
mDropdownFrame = aDropDownFrame;
if (NS_OK != CallQueryInterface(mDropdownFrame, &mListControlFrame)) {
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return NS_ERROR_FAILURE;
}
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return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetDropDown(nsIFrame** aDropDownFrame)
{
if (nsnull == aDropDownFrame) {
return NS_ERROR_FAILURE;
}
*aDropDownFrame = mDropdownFrame;
return NS_OK;
}
// Toggle dropdown list.
NS_IMETHODIMP
nsComboboxControlFrame::ToggleList(nsPresContext* aPresContext)
{
ShowList(aPresContext, (PR_FALSE == mDroppedDown));
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::AbsolutelyPositionDropDown()
{
nsRect absoluteTwips;
nsRect absolutePixels;
if (NS_SUCCEEDED(nsFormControlFrame::GetAbsoluteFramePosition(GetPresContext(), this, absoluteTwips, absolutePixels))) {
PositionDropdown(GetPresContext(), GetRect().height, absoluteTwips, absolutePixels);
}
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetAbsoluteRect(nsRect* aRect)
{
nsRect absoluteTwips;
return nsFormControlFrame::GetAbsoluteFramePosition(GetPresContext(), this, absoluteTwips, *aRect);
}
///////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsComboboxControlFrame::RedisplaySelectedText()
{
PRInt32 selectedIndex;
mListControlFrame->GetSelectedIndex(&selectedIndex);
return RedisplayText(selectedIndex);
}
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_LossyConvertUCS2toASCII(mDisplayedOptionText).get());
// Send reflow command because the new text maybe larger
nsresult rv = NS_OK;
if (mDisplayContent && mEventQueueService) {
// Don't call ActuallyDisplayText(PR_TRUE) directly here since that
// could cause recursive frame construction. See bug 283117 and the comment in
// HandleRedisplayTextEvent() below.
nsCOMPtr<nsIEventQueue> eventQueue;
rv = mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
if (eventQueue) {
RedisplayTextEvent* event = new RedisplayTextEvent(this);
if (event) {
// Revoke outstanding events to avoid out-of-order events which could mean
// displaying the wrong text.
if (mRedisplayTextEventPosted) {
eventQueue->RevokeEvents(this);
mRedisplayTextEventPosted = PR_FALSE;
}
rv = eventQueue->PostEvent(event);
if (NS_SUCCEEDED(rv)) {
mRedisplayTextEventPosted = PR_TRUE;
} else {
PL_DestroyEvent(event);
}
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
}
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.
GetPresContext()->GetDocument()->
FlushPendingNotifications(Flush_ContentAndNotify);
// 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;
mRedisplayTextEventPosted = PR_FALSE;
ActuallyDisplayText(PR_TRUE);
mDisplayFrame->AddStateBits(NS_FRAME_IS_DIRTY);
ReflowDirtyChild(GetPresContext()->PresShell(), mDisplayFrame);
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);
}
}
NS_IMETHODIMP
nsComboboxControlFrame::GetIndexOfDisplayArea(PRInt32* aDisplayedIndex)
{
NS_ENSURE_ARG_POINTER(aDisplayedIndex);
*aDisplayedIndex = mDisplayedIndex;
return NS_OK;
}
//----------------------------------------------------------------------
// nsISelectControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::DoneAddingChildren(PRBool aIsDone)
{
nsISelectControlFrame* listFrame = nsnull;
nsresult rv = NS_ERROR_FAILURE;
if (mDropdownFrame != nsnull) {
rv = CallQueryInterface(mDropdownFrame, &listFrame);
if (listFrame) {
rv = listFrame->DoneAddingChildren(aIsDone);
}
}
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::AddOption(nsPresContext* aPresContext, PRInt32 aIndex)
{
if (aIndex <= mDisplayedIndex) {
++mDisplayedIndex;
}
nsListControlFrame* lcf = NS_STATIC_CAST(nsListControlFrame*, mDropdownFrame);
return lcf->AddOption(aPresContext, aIndex);
}
NS_IMETHODIMP
nsComboboxControlFrame::RemoveOption(nsPresContext* aPresContext, PRInt32 aIndex)
{
PRInt32 len;
mListControlFrame->GetNumberOfOptions(&len);
if (len > 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);
}
nsListControlFrame* lcf = NS_STATIC_CAST(nsListControlFrame*, mDropdownFrame);
return lcf->RemoveOption(aPresContext, aIndex);
}
NS_IMETHODIMP
nsComboboxControlFrame::GetOptionSelected(PRInt32 aIndex, PRBool* aValue)
{
nsISelectControlFrame* listFrame = nsnull;
NS_ASSERTION(mDropdownFrame, "No dropdown frame!");
CallQueryInterface(mDropdownFrame, &listFrame);
NS_ASSERTION(listFrame, "No list frame!");
return listFrame->GetOptionSelected(aIndex, aValue);
}
NS_IMETHODIMP
nsComboboxControlFrame::OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex)
{
nsISelectControlFrame* listFrame = nsnull;
NS_ASSERTION(mDropdownFrame, "No dropdown frame!");
CallQueryInterface(mDropdownFrame, &listFrame);
NS_ASSERTION(listFrame, "No list frame!");
return listFrame->OnSetSelectedIndex(aOldIndex, aNewIndex);
}
// End nsISelectControlFrame
//----------------------------------------------------------------------
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NS_IMETHODIMP
nsComboboxControlFrame::HandleEvent(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
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{
NS_ENSURE_ARG_POINTER(aEventStatus);
if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
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return NS_OK;
}
if (nsFormControlHelper::GetDisabled(mContent)) {
return NS_OK;
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}
// 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 nsAreaFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
return NS_OK;
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}
nsresult
nsComboboxControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
{
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = CallQueryInterface(mDropdownFrame, &fcFrame);
if (NS_FAILED(result)) {
return result;
}
if (fcFrame) {
return fcFrame->SetFormProperty(aName, aValue);
}
return NS_OK;
}
nsresult
nsComboboxControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
{
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = CallQueryInterface(mDropdownFrame, &fcFrame);
if(NS_FAILED(result)) {
return result;
}
if (fcFrame) {
return fcFrame->GetFormProperty(aName, aValue);
}
return NS_OK;
}
nsIFrame*
nsComboboxControlFrame::GetContentInsertionFrame() {
return mInRedisplayText ? mDisplayFrame : mDropdownFrame->GetContentInsertionFrame();
}
NS_IMETHODIMP
nsComboboxControlFrame::CreateAnonymousContent(nsPresContext* aPresContext,
nsISupportsArray& aChildList)
{
// 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.
// In addition, if the frame created by content below for the button is not an nsGfxScrollFrame
// things will go wrong ... see SetButtonFrameSize.
// 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();
nsCOMPtr<nsITextContent> labelContent;
NS_NewTextNode(getter_AddRefs(labelContent), nimgr);
if (labelContent) {
// set the value of the text node
mDisplayContent.swap(labelContent);
mListControlFrame->GetSelectedIndex(&mDisplayedIndex);
if (mDisplayedIndex != -1) {
mListControlFrame->GetOptionText(mDisplayedIndex, mDisplayedOptionText);
}
ActuallyDisplayText(PR_FALSE);
nsCOMPtr<nsINodeInfo> nodeInfo;
nimgr->GetNodeInfo(nsHTMLAtoms::input, nsnull, kNameSpaceID_None,
getter_AddRefs(nodeInfo));
aChildList.AppendElement(mDisplayContent);
// create button which drops the list down
nsCOMPtr<nsIContent> btnContent;
nsresult rv = NS_NewHTMLElement(getter_AddRefs(btnContent), nodeInfo);
NS_ENSURE_SUCCESS(rv, rv);
// make someone to listen to the button. If its pressed by someone like Accessibility
// then open or close the combo box.
nsCOMPtr<nsIDOMEventReceiver> eventReceiver(do_QueryInterface(btnContent));
if (eventReceiver) {
mButtonListener = new nsComboButtonListener(this);
eventReceiver->AddEventListenerByIID(mButtonListener, NS_GET_IID(nsIDOMMouseListener));
}
btnContent->SetAttr(kNameSpaceID_None, nsHTMLAtoms::type, NS_LITERAL_STRING("button"), PR_FALSE);
// Set tabindex="-1" so that the button is not tabbable
btnContent->SetAttr(kNameSpaceID_None, nsHTMLAtoms::tabindex,
NS_LITERAL_STRING("-1"), PR_FALSE);
aChildList.AppendElement(btnContent);
}
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::CreateFrameFor(nsPresContext* aPresContext,
nsIContent * aContent,
nsIFrame** aFrame)
{
NS_PRECONDITION(nsnull != aFrame, "null ptr");
NS_PRECONDITION(nsnull != aContent, "null ptr");
NS_PRECONDITION(nsnull != aPresContext, "null ptr");
*aFrame = nsnull;
NS_ASSERTION(mDisplayContent, "mDisplayContent can't be null!");
if (!SameCOMIdentity(mDisplayContent, aContent)) {
// We only handle the frames for mDisplayContent here
return NS_ERROR_FAILURE;
}
// Get PresShell
nsIPresShell *shell = aPresContext->PresShell();
nsStyleSet *styleSet = shell->StyleSet();
// create the style contexts for the anonymous block frame and text frame
nsRefPtr<nsStyleContext> styleContext;
styleContext = styleSet->
ResolvePseudoStyleFor(mContent,
nsCSSAnonBoxes::mozDisplayComboboxControlFrame,
mStyleContext);
if (NS_UNLIKELY(!styleContext)) {
return NS_ERROR_NULL_POINTER;
}
nsRefPtr<nsStyleContext> textStyleContext;
textStyleContext = styleSet->ResolveStyleForNonElement(styleContext);
if (NS_UNLIKELY(!textStyleContext)) {
return NS_ERROR_NULL_POINTER;
}
// Start by by creating our anonymous block frame
mDisplayFrame = NS_NewBlockFrame(shell, NS_BLOCK_SPACE_MGR);
if (NS_UNLIKELY(!mDisplayFrame)) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsresult rv = mDisplayFrame->Init(aPresContext, mContent, this, styleContext,
nsnull);
if (NS_FAILED(rv)) {
mDisplayFrame->Destroy(aPresContext);
mDisplayFrame = nsnull;
return rv;
}
// Create a text frame and put it inside the block frame
mTextFrame = NS_NewTextFrame(shell);
if (NS_UNLIKELY(!mTextFrame)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// initialize the text frame
rv = mTextFrame->Init(aPresContext, aContent, mDisplayFrame,
textStyleContext, nsnull);
if (NS_FAILED(rv)) {
mDisplayFrame->Destroy(aPresContext);
mDisplayFrame = nsnull;
mTextFrame->Destroy(aPresContext);
mTextFrame = nsnull;
return rv;
}
mDisplayFrame->SetInitialChildList(aPresContext, nsnull, mTextFrame);
*aFrame = mDisplayFrame;
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::Destroy(nsPresContext* aPresContext)
{
// Revoke queued RedisplayTextEvents
if (mEventQueueService) {
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
if (eventQueue) {
eventQueue->RevokeEvents(this);
}
}
nsFormControlFrame::RegUnRegAccessKey(GetPresContext(), NS_STATIC_CAST(nsIFrame*, this), PR_FALSE);
if (mDroppedDown) {
// Get parent view
nsIFrame * listFrame;
if (NS_OK == mListControlFrame->QueryInterface(NS_GET_IID(nsIFrame), (void **)&listFrame)) {
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nsIView* view = listFrame->GetView();
NS_ASSERTION(view, "nsComboboxControlFrame view is null");
if (view) {
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nsIWidget* widget = view->GetWidget();
if (widget)
widget->CaptureRollupEvents((nsIRollupListener *)this, PR_FALSE, PR_TRUE);
}
}
}
// Cleanup frames in popup child list
mPopupFrames.DestroyFrames(aPresContext);
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return nsAreaFrame::Destroy(aPresContext);
}
nsIFrame*
nsComboboxControlFrame::GetFirstChild(nsIAtom* aListName) const
{
if (nsLayoutAtoms::popupList == aListName) {
return mPopupFrames.FirstChild();
}
return nsAreaFrame::GetFirstChild(aListName);
}
NS_IMETHODIMP
nsComboboxControlFrame::SetInitialChildList(nsPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv = NS_OK;
if (nsLayoutAtoms::popupList == aListName) {
mPopupFrames.SetFrames(aChildList);
} else {
rv = nsAreaFrame::SetInitialChildList(aPresContext, aListName, aChildList);
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for (nsIFrame * child = aChildList; child;
child = child->GetNextSibling()) {
nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(child->GetContent());
if (formControl && formControl->GetType() == NS_FORM_INPUT_BUTTON) {
mButtonFrame = child;
break;
}
}
NS_ASSERTION(mButtonFrame, "missing button frame in initial child list");
}
return rv;
}
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_FRAME_ABSOLUTE_LIST_INDEX) {
return nsAreaFrame::GetAdditionalChildListName(aIndex);
}
if (NS_COMBO_FRAME_POPUP_LIST_INDEX == aIndex) {
return nsLayoutAtoms::popupList;
}
return nsnull;
}
PRIntn
nsComboboxControlFrame::GetSkipSides() const
{
// Don't skip any sides during border rendering
return 0;
}
//----------------------------------------------------------------------
//nsIRollupListener
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::Rollup()
{
if (mDroppedDown) {
mListControlFrame->AboutToRollup();
ShowDropDown(PR_FALSE);
mListControlFrame->CaptureMouseEvents(GetPresContext(), PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::RollupFromList(nsPresContext* aPresContext)
{
ShowList(aPresContext, PR_FALSE);
mListControlFrame->CaptureMouseEvents(aPresContext, PR_FALSE);
return NS_OK;
}
NS_IMETHODIMP_(PRInt32)
nsComboboxControlFrame::UpdateRecentIndex(PRInt32 aIndex)
{
PRInt32 index = mRecentSelectedIndex;
if (mRecentSelectedIndex == -1 || aIndex == -1)
mRecentSelectedIndex = aIndex;
return index;
}
NS_METHOD
nsComboboxControlFrame::Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
PRBool isVisible;
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && !isVisible) {
return NS_OK;
}
#ifdef NOISY
printf("%p paint layer %d at (%d, %d, %d, %d)\n", this, aWhichLayer,
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
#endif
// We paint everything in the foreground so that the form control's
// parents cannot paint over it in other passes (bug 95826).
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
nsAreaFrame::Paint(aPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_BACKGROUND);
nsAreaFrame::Paint(aPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FLOATS);
nsAreaFrame::Paint(aPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FOREGROUND);
// nsITheme should take care of drawing the focus border, but currently does so only on Mac.
// If all of the nsITheme implementations are fixed to draw the focus border correctly,
// this #ifdef should be replaced with a -moz-appearance / ThemeSupportsWidget() check.
if (!ToolkitHasNativePopup() && mDisplayFrame) {
aRenderingContext.PushState();
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nsRect clipRect = mDisplayFrame->GetRect();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
mDisplayFrame, NS_FRAME_PAINT_LAYER_BACKGROUND);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
mDisplayFrame, NS_FRAME_PAINT_LAYER_FOREGROUND);
/////////////////////
// draw focus
// XXX This is only temporary
// Only paint the focus if we're visible
if (GetStyleVisibility()->IsVisible()) {
if (!nsFormControlHelper::GetDisabled(mContent) && mFocused == this) {
aRenderingContext.SetLineStyle(nsLineStyle_kDotted);
aRenderingContext.SetColor(0);
} else {
aRenderingContext.SetColor(GetStyleBackground()->mBackgroundColor);
aRenderingContext.SetLineStyle(nsLineStyle_kSolid);
}
//aRenderingContext.DrawRect(clipRect);
float p2t = aPresContext->PixelsToTwips();
nscoord onePixel = NSIntPixelsToTwips(1, p2t);
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();
}
}
// Call to the base class to draw selection borders when appropriate
return nsFrame::Paint(aPresContext,aRenderingContext,aDirtyRect,aWhichLayer);
}
//----------------------------------------------------------------------
//nsIScrollableViewProvider
//----------------------------------------------------------------------
nsIScrollableView* nsComboboxControlFrame::GetScrollableView()
{
if (!mDropdownFrame)
return nsnull;
nsIScrollableFrame* scrollable = nsnull;
nsresult rv = CallQueryInterface(mDropdownFrame, &scrollable);
if (NS_FAILED(rv))
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(nsPresContext* aPresContext,
PRInt32 aIndex,
PRBool aSelected)
{
if (mDroppedDown) {
nsCOMPtr<nsISelectControlFrame> selectFrame
= do_QueryInterface(mListControlFrame);
if (selectFrame) {
selectFrame->OnOptionSelected(aPresContext, aIndex, aSelected);
}
} else {
if (aSelected) {
RedisplayText(aIndex);
} else {
RedisplaySelectedText();
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<nsIDOMEvent> event;
nsCOMPtr<nsIEventListenerManager> manager;
mContent->GetListenerManager(getter_AddRefs(manager));
nsPresContext* presContext = GetPresContext();
if (manager &&
NS_SUCCEEDED(manager->CreateEvent(presContext, nsnull, NS_LITERAL_STRING("Events"), getter_AddRefs(event)))) {
event->InitEvent(NS_LITERAL_STRING("ValueChange"), PR_TRUE, PR_TRUE);
nsCOMPtr<nsIPrivateDOMEvent> privateEvent(do_QueryInterface(event));
privateEvent->SetTrusted(PR_TRUE);
PRBool defaultActionEnabled;
presContext->EventStateManager()->DispatchNewEvent(mContent, event,
&defaultActionEnabled);
}
}
void
nsComboboxControlFrame::OnContentReset()
{
if (mListControlFrame) {
mListControlFrame->OnContentReset();
}
}
//--------------------------------------------------------
// nsIStatefulFrame
//--------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::SaveState(SpecialStateID aStateID,
nsPresState** aState)
{
if (!mListControlFrame)
return NS_ERROR_FAILURE;
nsIStatefulFrame* stateful;
CallQueryInterface(mListControlFrame, &stateful);
return stateful->SaveState(aStateID, aState);
}
NS_IMETHODIMP
nsComboboxControlFrame::RestoreState(nsPresState* aState)
{
if (!mListControlFrame)
return NS_ERROR_FAILURE;
nsIStatefulFrame* stateful;
nsresult rv = CallQueryInterface(mListControlFrame, &stateful);
NS_ASSERTION(NS_SUCCEEDED(rv), "Must implement nsIStatefulFrame");
rv = stateful->RestoreState(aState);
return rv;
}
//
// Camino uses a native widget for the combobox
// popup, which affects drawing and event
// handling here and in nsListControlFrame.
//
/* static */
PRBool
nsComboboxControlFrame::ToolkitHasNativePopup()
{
#ifdef MOZ_MACBROWSER
return PR_TRUE;
#else
return PR_FALSE;
#endif
}