зеркало из https://github.com/mozilla/pjs.git
2658 строки
85 KiB
C++
2658 строки
85 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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* Mats Palmgren <matspal@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nscore.h"
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#include "nsCOMPtr.h"
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#include "nsReadableUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsListControlFrame.h"
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#include "nsFormControlFrame.h" // for COMPARE macro
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#include "nsGkAtoms.h"
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#include "nsIFormControl.h"
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#include "nsIDocument.h"
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#include "nsIDOMHTMLCollection.h"
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#include "nsIDOMHTMLOptionsCollection.h"
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#include "nsIDOMNSHTMLOptionCollectn.h"
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#include "nsIDOMHTMLSelectElement.h"
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#include "nsIDOMHTMLOptionElement.h"
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#include "nsComboboxControlFrame.h"
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#include "nsIViewManager.h"
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#include "nsIDOMHTMLOptGroupElement.h"
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#include "nsWidgetsCID.h"
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#include "nsIPresShell.h"
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#include "nsHTMLParts.h"
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#include "nsIDOMEventTarget.h"
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#include "nsEventDispatcher.h"
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#include "nsEventStateManager.h"
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#include "nsEventListenerManager.h"
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#include "nsIDOMKeyEvent.h"
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#include "nsIDOMMouseEvent.h"
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#include "nsIPrivateDOMEvent.h"
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#include "nsXPCOM.h"
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#include "nsISupportsPrimitives.h"
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#include "nsIComponentManager.h"
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#include "nsFontMetrics.h"
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#include "nsIScrollableFrame.h"
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#include "nsIDOMNSEvent.h"
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#include "nsGUIEvent.h"
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#include "nsIServiceManager.h"
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#include "nsINodeInfo.h"
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#ifdef ACCESSIBILITY
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#include "nsAccessibilityService.h"
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#endif
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#include "nsHTMLSelectElement.h"
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#include "nsIPrivateDOMEvent.h"
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#include "nsCSSRendering.h"
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#include "nsITheme.h"
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#include "nsIDOMEventListener.h"
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#include "nsLayoutUtils.h"
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#include "nsDisplayList.h"
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#include "nsContentUtils.h"
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#include "mozilla/LookAndFeel.h"
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using namespace mozilla;
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// Constants
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const nscoord kMaxDropDownRows = 20; // This matches the setting for 4.x browsers
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const PRInt32 kNothingSelected = -1;
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// Static members
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nsListControlFrame * nsListControlFrame::mFocused = nsnull;
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nsString * nsListControlFrame::sIncrementalString = nsnull;
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// Using for incremental typing navigation
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#define INCREMENTAL_SEARCH_KEYPRESS_TIME 1000
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// XXX, kyle.yuan@sun.com, there are 4 definitions for the same purpose:
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// nsMenuPopupFrame.h, nsListControlFrame.cpp, listbox.xml, tree.xml
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// need to find a good place to put them together.
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// if someone changes one, please also change the other.
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DOMTimeStamp nsListControlFrame::gLastKeyTime = 0;
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/******************************************************************************
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* nsListEventListener
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* This class is responsible for propagating events to the nsListControlFrame.
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* Frames are not refcounted so they can't be used as event listeners.
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*****************************************************************************/
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class nsListEventListener : public nsIDOMEventListener
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{
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public:
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nsListEventListener(nsListControlFrame *aFrame)
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: mFrame(aFrame) { }
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void SetFrame(nsListControlFrame *aFrame) { mFrame = aFrame; }
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOMEVENTLISTENER
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private:
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nsListControlFrame *mFrame;
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};
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//---------------------------------------------------------
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nsIFrame*
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NS_NewListControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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nsListControlFrame* it =
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new (aPresShell) nsListControlFrame(aPresShell, aPresShell->GetDocument(), aContext);
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if (it) {
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it->AddStateBits(NS_FRAME_INDEPENDENT_SELECTION);
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}
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return it;
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsListControlFrame)
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//---------------------------------------------------------
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nsListControlFrame::nsListControlFrame(
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nsIPresShell* aShell, nsIDocument* aDocument, nsStyleContext* aContext)
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: nsHTMLScrollFrame(aShell, aContext, PR_FALSE),
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mMightNeedSecondPass(PR_FALSE),
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mHasPendingInterruptAtStartOfReflow(PR_FALSE),
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mLastDropdownComputedHeight(NS_UNCONSTRAINEDSIZE)
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{
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mComboboxFrame = nsnull;
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mChangesSinceDragStart = PR_FALSE;
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mButtonDown = PR_FALSE;
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mIsAllContentHere = PR_FALSE;
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mIsAllFramesHere = PR_FALSE;
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mHasBeenInitialized = PR_FALSE;
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mNeedToReset = PR_TRUE;
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mPostChildrenLoadedReset = PR_FALSE;
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mControlSelectMode = PR_FALSE;
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}
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//---------------------------------------------------------
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nsListControlFrame::~nsListControlFrame()
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{
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mComboboxFrame = nsnull;
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}
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// for Bug 47302 (remove this comment later)
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void
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nsListControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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// get the receiver interface from the browser button's content node
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ENSURE_TRUE(mContent);
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// Clear the frame pointer on our event listener, just in case the
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// event listener can outlive the frame.
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mEventListener->SetFrame(nsnull);
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mContent->RemoveEventListener(NS_LITERAL_STRING("keypress"), mEventListener,
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PR_FALSE);
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mContent->RemoveEventListener(NS_LITERAL_STRING("mousedown"), mEventListener,
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PR_FALSE);
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mContent->RemoveEventListener(NS_LITERAL_STRING("mouseup"), mEventListener,
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PR_FALSE);
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mContent->RemoveEventListener(NS_LITERAL_STRING("mousemove"), mEventListener,
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PR_FALSE);
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nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), PR_FALSE);
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nsHTMLScrollFrame::DestroyFrom(aDestructRoot);
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}
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NS_IMETHODIMP
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nsListControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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// We allow visibility:hidden <select>s to contain visible options.
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// Don't allow painting of list controls when painting is suppressed.
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// XXX why do we need this here? we should never reach this. Maybe
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// because these can have widgets? Hmm
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if (aBuilder->IsBackgroundOnly())
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return NS_OK;
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DO_GLOBAL_REFLOW_COUNT_DSP("nsListControlFrame");
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if (IsInDropDownMode()) {
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NS_ASSERTION(NS_GET_A(mLastDropdownBackstopColor) == 255,
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"need an opaque backstop color");
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// XXX Because we have an opaque widget and we get called to paint with
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// this frame as the root of a stacking context we need make sure to draw
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// some opaque color over the whole widget. (Bug 511323)
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aLists.BorderBackground()->AppendNewToBottom(
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new (aBuilder) nsDisplaySolidColor(aBuilder,
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this, nsRect(aBuilder->ToReferenceFrame(this), GetSize()),
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mLastDropdownBackstopColor));
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}
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// REVIEW: The selection visibility code that used to be here is what
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// we already do by default.
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// REVIEW: There was code here to paint the theme background. But as far
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// as I can tell, we'd just paint the theme background twice because
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// it was redundant with nsCSSRendering::PaintBackground
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return nsHTMLScrollFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
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}
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/**
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* This is called by the SelectsAreaFrame, which is the same
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* as the frame returned by GetOptionsContainer. It's the frame which is
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* scrolled by us.
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* @param aPt the offset of this frame, relative to the rendering reference
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* frame
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*/
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void nsListControlFrame::PaintFocus(nsRenderingContext& aRC, nsPoint aPt)
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{
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if (mFocused != this) return;
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nsPresContext* presContext = PresContext();
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nsIFrame* containerFrame = GetOptionsContainer();
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if (!containerFrame) return;
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nsIFrame* childframe = nsnull;
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nsCOMPtr<nsIContent> focusedContent = GetCurrentOption();
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if (focusedContent) {
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childframe = focusedContent->GetPrimaryFrame();
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}
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nsRect fRect;
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if (childframe) {
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// get the child rect
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fRect = childframe->GetRect();
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// get it into our coordinates
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fRect.MoveBy(childframe->GetParent()->GetOffsetTo(this));
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} else {
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fRect.x = fRect.y = 0;
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fRect.width = GetScrollPortRect().width;
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fRect.height = CalcFallbackRowHeight();
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fRect.MoveBy(containerFrame->GetOffsetTo(this));
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}
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fRect += aPt;
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bool lastItemIsSelected = false;
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if (focusedContent) {
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nsCOMPtr<nsIDOMHTMLOptionElement> domOpt =
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do_QueryInterface(focusedContent);
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if (domOpt) {
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domOpt->GetSelected(&lastItemIsSelected);
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}
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}
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// set up back stop colors and then ask L&F service for the real colors
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nscolor color =
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LookAndFeel::GetColor(lastItemIsSelected ?
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LookAndFeel::eColorID_WidgetSelectForeground :
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LookAndFeel::eColorID_WidgetSelectBackground);
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nsCSSRendering::PaintFocus(presContext, aRC, fRect, color);
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}
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void
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nsListControlFrame::InvalidateFocus()
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{
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if (mFocused != this)
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return;
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nsIFrame* containerFrame = GetOptionsContainer();
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if (containerFrame) {
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// Invalidating from the containerFrame because that's where our focus
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// is drawn.
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// The origin of the scrollport is the origin of containerFrame.
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nsRect invalidateArea = containerFrame->GetVisualOverflowRect();
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nsRect emptyFallbackArea(0, 0, GetScrollPortRect().width, CalcFallbackRowHeight());
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invalidateArea.UnionRect(invalidateArea, emptyFallbackArea);
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containerFrame->Invalidate(invalidateArea);
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}
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}
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NS_QUERYFRAME_HEAD(nsListControlFrame)
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NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
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NS_QUERYFRAME_ENTRY(nsIListControlFrame)
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NS_QUERYFRAME_ENTRY(nsISelectControlFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsHTMLScrollFrame)
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#ifdef ACCESSIBILITY
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already_AddRefed<nsAccessible>
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nsListControlFrame::CreateAccessible()
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{
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nsAccessibilityService* accService = nsIPresShell::AccService();
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if (accService) {
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return accService->CreateHTMLListboxAccessible(mContent,
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PresContext()->PresShell());
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}
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return nsnull;
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}
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#endif
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static nscoord
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GetMaxOptionHeight(nsIFrame* aContainer)
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{
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nscoord result = 0;
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for (nsIFrame* option = aContainer->GetFirstPrincipalChild();
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option; option = option->GetNextSibling()) {
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nscoord optionHeight;
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if (nsCOMPtr<nsIDOMHTMLOptGroupElement>
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(do_QueryInterface(option->GetContent()))) {
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// an optgroup
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optionHeight = GetMaxOptionHeight(option);
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} else {
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// an option
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optionHeight = option->GetSize().height;
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}
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if (result < optionHeight)
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result = optionHeight;
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}
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return result;
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}
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static PRUint32
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GetNumberOfOptionsRecursive(nsIContent* aContent)
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{
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if (!aContent) {
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return 0;
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}
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PRUint32 optionCount = 0;
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for (nsIContent* cur = aContent->GetFirstChild();
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cur;
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cur = cur->GetNextSibling()) {
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if (cur->IsHTML(nsGkAtoms::option)) {
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++optionCount;
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} else if (cur->IsHTML(nsGkAtoms::optgroup)) {
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optionCount += GetNumberOfOptionsRecursive(cur);
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}
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}
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return optionCount;
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}
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//-----------------------------------------------------------------
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// Main Reflow for ListBox/Dropdown
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//-----------------------------------------------------------------
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nscoord
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nsListControlFrame::CalcHeightOfARow()
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{
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// Calculate the height of a single row in the listbox or dropdown list by
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// using the tallest thing in the subtree, since there may be option groups
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// in addition to option elements, either of which may be visible or
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// invisible, may use different fonts, etc.
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PRInt32 heightOfARow = GetMaxOptionHeight(GetOptionsContainer());
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// Check to see if we have zero items (and optimize by checking
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// heightOfARow first)
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if (heightOfARow == 0 && GetNumberOfOptions() == 0) {
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heightOfARow = CalcFallbackRowHeight();
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}
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return heightOfARow;
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}
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nscoord
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nsListControlFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
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{
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nscoord result;
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DISPLAY_PREF_WIDTH(this, result);
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// Always add scrollbar widths to the pref-width of the scrolled
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// content. Combobox frames depend on this happening in the dropdown,
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// and standalone listboxes are overflow:scroll so they need it too.
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result = GetScrolledFrame()->GetPrefWidth(aRenderingContext);
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result = NSCoordSaturatingAdd(result,
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GetDesiredScrollbarSizes(PresContext(), aRenderingContext).LeftRight());
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return result;
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}
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nscoord
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nsListControlFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
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{
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nscoord result;
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DISPLAY_MIN_WIDTH(this, result);
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// Always add scrollbar widths to the min-width of the scrolled
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// content. Combobox frames depend on this happening in the dropdown,
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// and standalone listboxes are overflow:scroll so they need it too.
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result = GetScrolledFrame()->GetMinWidth(aRenderingContext);
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result += GetDesiredScrollbarSizes(PresContext(), aRenderingContext).LeftRight();
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return result;
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}
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NS_IMETHODIMP
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nsListControlFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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NS_PRECONDITION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
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"Must have a computed width");
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mHasPendingInterruptAtStartOfReflow = aPresContext->HasPendingInterrupt();
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// If all the content and frames are here
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// then initialize it before reflow
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if (mIsAllContentHere && !mHasBeenInitialized) {
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if (PR_FALSE == mIsAllFramesHere) {
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CheckIfAllFramesHere();
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}
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if (mIsAllFramesHere && !mHasBeenInitialized) {
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mHasBeenInitialized = PR_TRUE;
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}
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}
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if (GetStateBits() & NS_FRAME_FIRST_REFLOW) {
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nsFormControlFrame::RegUnRegAccessKey(this, PR_TRUE);
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}
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if (IsInDropDownMode()) {
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return ReflowAsDropdown(aPresContext, aDesiredSize, aReflowState, aStatus);
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}
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/*
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* Due to the fact that our intrinsic height depends on the heights of our
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* kids, we end up having to do two-pass reflow, in general -- the first pass
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* to find the intrinsic height and a second pass to reflow the scrollframe
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* at that height (which will size the scrollbars correctly, etc).
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*
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* Naturaly, we want to avoid doing the second reflow as much as possible.
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* We can skip it in the following cases (in all of which the first reflow is
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* already happening at the right height):
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*
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* - We're reflowing with a constrained computed height -- just use that
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* height.
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* - We're not dirty and have no dirty kids and shouldn't be reflowing all
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* kids. In this case, our cached max height of a child is not going to
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* change.
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* - We do our first reflow using our cached max height of a child, then
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* compute the new max height and it's the same as the old one.
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*/
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bool autoHeight = (aReflowState.ComputedHeight() == NS_UNCONSTRAINEDSIZE);
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mMightNeedSecondPass = autoHeight &&
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(NS_SUBTREE_DIRTY(this) || aReflowState.ShouldReflowAllKids());
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nsHTMLReflowState state(aReflowState);
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PRInt32 length = GetNumberOfOptions();
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nscoord oldHeightOfARow = HeightOfARow();
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if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW) && autoHeight) {
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// When not doing an initial reflow, and when the height is auto, start off
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// with our computed height set to what we'd expect our height to be.
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nscoord computedHeight = CalcIntrinsicHeight(oldHeightOfARow, length);
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state.ApplyMinMaxConstraints(nsnull, &computedHeight);
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state.SetComputedHeight(computedHeight);
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}
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nsresult rv = nsHTMLScrollFrame::Reflow(aPresContext, aDesiredSize,
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state, aStatus);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!mMightNeedSecondPass) {
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NS_ASSERTION(!autoHeight || HeightOfARow() == oldHeightOfARow,
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"How did our height of a row change if nothing was dirty?");
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NS_ASSERTION(!autoHeight ||
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!(GetStateBits() & NS_FRAME_FIRST_REFLOW),
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"How do we not need a second pass during initial reflow at "
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"auto height?");
|
|
NS_ASSERTION(!IsScrollbarUpdateSuppressed(),
|
|
"Shouldn't be suppressing if we don't need a second pass!");
|
|
if (!autoHeight) {
|
|
// Update our mNumDisplayRows based on our new row height now that we
|
|
// know it. Note that if autoHeight and we landed in this code then we
|
|
// already set mNumDisplayRows in CalcIntrinsicHeight. Also note that we
|
|
// can't use HeightOfARow() here because that just uses a cached value
|
|
// that we didn't compute.
|
|
nscoord rowHeight = CalcHeightOfARow();
|
|
if (rowHeight == 0) {
|
|
// Just pick something
|
|
mNumDisplayRows = 1;
|
|
} else {
|
|
mNumDisplayRows = NS_MAX(1, state.ComputedHeight() / rowHeight);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
mMightNeedSecondPass = PR_FALSE;
|
|
|
|
// Now see whether we need a second pass. If we do, our nsSelectsAreaFrame
|
|
// will have suppressed the scrollbar update.
|
|
if (!IsScrollbarUpdateSuppressed()) {
|
|
// All done. No need to do more reflow.
|
|
NS_ASSERTION(!IsScrollbarUpdateSuppressed(),
|
|
"Shouldn't be suppressing if the height of a row has not "
|
|
"changed!");
|
|
return rv;
|
|
}
|
|
|
|
SetSuppressScrollbarUpdate(PR_FALSE);
|
|
|
|
// Gotta reflow again.
|
|
// XXXbz We're just changing the height here; do we need to dirty ourselves
|
|
// or anything like that? We might need to, per the letter of the reflow
|
|
// protocol, but things seem to work fine without it... Is that just an
|
|
// implementation detail of nsHTMLScrollFrame that we're depending on?
|
|
nsHTMLScrollFrame::DidReflow(aPresContext, &state, aStatus);
|
|
|
|
// Now compute the height we want to have
|
|
nscoord computedHeight = CalcIntrinsicHeight(HeightOfARow(), length);
|
|
state.ApplyMinMaxConstraints(nsnull, &computedHeight);
|
|
state.SetComputedHeight(computedHeight);
|
|
|
|
nsHTMLScrollFrame::WillReflow(aPresContext);
|
|
|
|
// XXXbz to make the ascent really correct, we should add our
|
|
// mComputedPadding.top to it (and subtract it from descent). Need that
|
|
// because nsGfxScrollFrame just adds in the border....
|
|
return nsHTMLScrollFrame::Reflow(aPresContext, aDesiredSize, state, aStatus);
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::ReflowAsDropdown(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
NS_PRECONDITION(aReflowState.ComputedHeight() == NS_UNCONSTRAINEDSIZE,
|
|
"We should not have a computed height here!");
|
|
|
|
mMightNeedSecondPass = NS_SUBTREE_DIRTY(this) ||
|
|
aReflowState.ShouldReflowAllKids();
|
|
|
|
#ifdef DEBUG
|
|
nscoord oldHeightOfARow = HeightOfARow();
|
|
#endif
|
|
|
|
nsHTMLReflowState state(aReflowState);
|
|
|
|
nscoord oldVisibleHeight;
|
|
if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
|
|
// When not doing an initial reflow, and when the height is auto, start off
|
|
// with our computed height set to what we'd expect our height to be.
|
|
// Note: At this point, mLastDropdownComputedHeight can be
|
|
// NS_UNCONSTRAINEDSIZE in cases when last time we didn't have to constrain
|
|
// the height. That's fine; just do the same thing as last time.
|
|
state.SetComputedHeight(mLastDropdownComputedHeight);
|
|
oldVisibleHeight = GetScrolledFrame()->GetSize().height;
|
|
} else {
|
|
// Set oldVisibleHeight to something that will never test true against a
|
|
// real height.
|
|
oldVisibleHeight = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
|
|
nsresult rv = nsHTMLScrollFrame::Reflow(aPresContext, aDesiredSize,
|
|
state, aStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (!mMightNeedSecondPass) {
|
|
NS_ASSERTION(oldVisibleHeight == GetScrolledFrame()->GetSize().height,
|
|
"How did our kid's height change if nothing was dirty?");
|
|
NS_ASSERTION(HeightOfARow() == oldHeightOfARow,
|
|
"How did our height of a row change if nothing was dirty?");
|
|
NS_ASSERTION(!IsScrollbarUpdateSuppressed(),
|
|
"Shouldn't be suppressing if we don't need a second pass!");
|
|
NS_ASSERTION(!(GetStateBits() & NS_FRAME_FIRST_REFLOW),
|
|
"How can we avoid a second pass during first reflow?");
|
|
return rv;
|
|
}
|
|
|
|
mMightNeedSecondPass = PR_FALSE;
|
|
|
|
// Now see whether we need a second pass. If we do, our nsSelectsAreaFrame
|
|
// will have suppressed the scrollbar update.
|
|
if (!IsScrollbarUpdateSuppressed()) {
|
|
// All done. No need to do more reflow.
|
|
NS_ASSERTION(!(GetStateBits() & NS_FRAME_FIRST_REFLOW),
|
|
"How can we avoid a second pass during first reflow?");
|
|
return rv;
|
|
}
|
|
|
|
SetSuppressScrollbarUpdate(PR_FALSE);
|
|
|
|
nscoord visibleHeight = GetScrolledFrame()->GetSize().height;
|
|
nscoord heightOfARow = HeightOfARow();
|
|
|
|
// Gotta reflow again.
|
|
// XXXbz We're just changing the height here; do we need to dirty ourselves
|
|
// or anything like that? We might need to, per the letter of the reflow
|
|
// protocol, but things seem to work fine without it... Is that just an
|
|
// implementation detail of nsHTMLScrollFrame that we're depending on?
|
|
nsHTMLScrollFrame::DidReflow(aPresContext, &state, aStatus);
|
|
|
|
// Now compute the height we want to have
|
|
mNumDisplayRows = kMaxDropDownRows;
|
|
if (visibleHeight > mNumDisplayRows * heightOfARow) {
|
|
visibleHeight = mNumDisplayRows * heightOfARow;
|
|
// This is an adaptive algorithm for figuring out how many rows
|
|
// should be displayed in the drop down. The standard size is 20 rows,
|
|
// but on 640x480 it is typically too big.
|
|
// This takes the height of the screen divides it by two and then subtracts off
|
|
// an estimated height of the combobox. I estimate it by taking the max element size
|
|
// of the drop down and multiplying it by 2 (this is arbitrary) then subtract off
|
|
// the border and padding of the drop down (again rather arbitrary)
|
|
// This all breaks down if the font of the combobox is a lot larger then the option items
|
|
// or CSS style has set the height of the combobox to be rather large.
|
|
// We can fix these cases later if they actually happen.
|
|
nsRect screen = nsFormControlFrame::GetUsableScreenRect(aPresContext);
|
|
nscoord screenHeight = screen.height;
|
|
|
|
nscoord availDropHgt = (screenHeight / 2) - (heightOfARow*2); // approx half screen minus combo size
|
|
availDropHgt -= aReflowState.mComputedBorderPadding.top + aReflowState.mComputedBorderPadding.bottom;
|
|
|
|
nscoord hgt = visibleHeight + aReflowState.mComputedBorderPadding.top + aReflowState.mComputedBorderPadding.bottom;
|
|
if (heightOfARow > 0) {
|
|
if (hgt > availDropHgt) {
|
|
visibleHeight = (availDropHgt / heightOfARow) * heightOfARow;
|
|
}
|
|
mNumDisplayRows = visibleHeight / heightOfARow;
|
|
} else {
|
|
// Hmmm, not sure what to do here. Punt, and make both of them one
|
|
visibleHeight = 1;
|
|
mNumDisplayRows = 1;
|
|
}
|
|
|
|
state.SetComputedHeight(mNumDisplayRows * heightOfARow);
|
|
// Note: no need to apply min/max constraints, since we have no such
|
|
// rules applied to the combobox dropdown.
|
|
// XXXbz this is ending up too big!! Figure out why.
|
|
} else if (visibleHeight == 0) {
|
|
// Looks like we have no options. Just size us to a single row height.
|
|
state.SetComputedHeight(heightOfARow);
|
|
} else {
|
|
// Not too big, not too small. Just use it!
|
|
state.SetComputedHeight(NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
// Note: At this point, state.mComputedHeight can be NS_UNCONSTRAINEDSIZE in
|
|
// cases when there were some options, but not too many (so no scrollbar was
|
|
// needed). That's fine; just store that.
|
|
mLastDropdownComputedHeight = state.ComputedHeight();
|
|
|
|
nsHTMLScrollFrame::WillReflow(aPresContext);
|
|
return nsHTMLScrollFrame::Reflow(aPresContext, aDesiredSize, state, aStatus);
|
|
}
|
|
|
|
nsGfxScrollFrameInner::ScrollbarStyles
|
|
nsListControlFrame::GetScrollbarStyles() const
|
|
{
|
|
// We can't express this in the style system yet; when we can, this can go away
|
|
// and GetScrollbarStyles can be devirtualized
|
|
PRInt32 verticalStyle = IsInDropDownMode() ? NS_STYLE_OVERFLOW_AUTO
|
|
: NS_STYLE_OVERFLOW_SCROLL;
|
|
return nsGfxScrollFrameInner::ScrollbarStyles(NS_STYLE_OVERFLOW_HIDDEN,
|
|
verticalStyle);
|
|
}
|
|
|
|
bool
|
|
nsListControlFrame::ShouldPropagateComputedHeightToScrolledContent() const
|
|
{
|
|
return !IsInDropDownMode();
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
nsIFrame*
|
|
nsListControlFrame::GetContentInsertionFrame() {
|
|
return GetOptionsContainer()->GetContentInsertionFrame();
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
// Starts at the passed in content object and walks up the
|
|
// parent heierarchy looking for the nsIDOMHTMLOptionElement
|
|
//---------------------------------------------------------
|
|
nsIContent *
|
|
nsListControlFrame::GetOptionFromContent(nsIContent *aContent)
|
|
{
|
|
for (nsIContent* content = aContent; content; content = content->GetParent()) {
|
|
if (content->IsHTML(nsGkAtoms::option)) {
|
|
return content;
|
|
}
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
// Finds the index of the hit frame's content in the list
|
|
// of option elements
|
|
//---------------------------------------------------------
|
|
PRInt32
|
|
nsListControlFrame::GetIndexFromContent(nsIContent *aContent)
|
|
{
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> option;
|
|
option = do_QueryInterface(aContent);
|
|
if (option) {
|
|
PRInt32 retval;
|
|
option->GetIndex(&retval);
|
|
if (retval >= 0) {
|
|
return retval;
|
|
}
|
|
}
|
|
return kNothingSelected;
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
bool
|
|
nsListControlFrame::ExtendedSelection(PRInt32 aStartIndex,
|
|
PRInt32 aEndIndex,
|
|
bool aClearAll)
|
|
{
|
|
return SetOptionsSelectedFromFrame(aStartIndex, aEndIndex,
|
|
PR_TRUE, aClearAll);
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
bool
|
|
nsListControlFrame::SingleSelection(PRInt32 aClickedIndex, bool aDoToggle)
|
|
{
|
|
if (mComboboxFrame) {
|
|
mComboboxFrame->UpdateRecentIndex(GetSelectedIndex());
|
|
}
|
|
|
|
bool wasChanged = false;
|
|
// Get Current selection
|
|
if (aDoToggle) {
|
|
wasChanged = ToggleOptionSelectedFromFrame(aClickedIndex);
|
|
} else {
|
|
wasChanged = SetOptionsSelectedFromFrame(aClickedIndex, aClickedIndex,
|
|
PR_TRUE, PR_TRUE);
|
|
}
|
|
ScrollToIndex(aClickedIndex);
|
|
|
|
#ifdef ACCESSIBILITY
|
|
bool isCurrentOptionChanged = mEndSelectionIndex != aClickedIndex;
|
|
#endif
|
|
mStartSelectionIndex = aClickedIndex;
|
|
mEndSelectionIndex = aClickedIndex;
|
|
InvalidateFocus();
|
|
|
|
#ifdef ACCESSIBILITY
|
|
if (isCurrentOptionChanged) {
|
|
FireMenuItemActiveEvent();
|
|
}
|
|
#endif
|
|
|
|
return wasChanged;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::InitSelectionRange(PRInt32 aClickedIndex)
|
|
{
|
|
//
|
|
// If nothing is selected, set the start selection depending on where
|
|
// the user clicked and what the initial selection is:
|
|
// - if the user clicked *before* selectedIndex, set the start index to
|
|
// the end of the first contiguous selection.
|
|
// - if the user clicked *after* the end of the first contiguous
|
|
// selection, set the start index to selectedIndex.
|
|
// - if the user clicked *within* the first contiguous selection, set the
|
|
// start index to selectedIndex.
|
|
// The last two rules, of course, boil down to the same thing: if the user
|
|
// clicked >= selectedIndex, return selectedIndex.
|
|
//
|
|
// This makes it so that shift click works properly when you first click
|
|
// in a multiple select.
|
|
//
|
|
PRInt32 selectedIndex = GetSelectedIndex();
|
|
if (selectedIndex >= 0) {
|
|
// Get the end of the contiguous selection
|
|
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = GetOptions(mContent);
|
|
NS_ASSERTION(options, "Collection of options is null!");
|
|
PRUint32 numOptions;
|
|
options->GetLength(&numOptions);
|
|
PRUint32 i;
|
|
// Push i to one past the last selected index in the group
|
|
for (i=selectedIndex+1; i < numOptions; i++) {
|
|
bool selected;
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> option = GetOption(options, i);
|
|
option->GetSelected(&selected);
|
|
if (!selected) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (aClickedIndex < selectedIndex) {
|
|
// User clicked before selection, so start selection at end of
|
|
// contiguous selection
|
|
mStartSelectionIndex = i-1;
|
|
mEndSelectionIndex = selectedIndex;
|
|
} else {
|
|
// User clicked after selection, so start selection at start of
|
|
// contiguous selection
|
|
mStartSelectionIndex = selectedIndex;
|
|
mEndSelectionIndex = i-1;
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
bool
|
|
nsListControlFrame::PerformSelection(PRInt32 aClickedIndex,
|
|
bool aIsShift,
|
|
bool aIsControl)
|
|
{
|
|
bool wasChanged = false;
|
|
|
|
if (aClickedIndex == kNothingSelected) {
|
|
}
|
|
else if (GetMultiple()) {
|
|
if (aIsShift) {
|
|
// Make sure shift+click actually does something expected when
|
|
// the user has never clicked on the select
|
|
if (mStartSelectionIndex == kNothingSelected) {
|
|
InitSelectionRange(aClickedIndex);
|
|
}
|
|
|
|
// Get the range from beginning (low) to end (high)
|
|
// Shift *always* works, even if the current option is disabled
|
|
PRInt32 startIndex;
|
|
PRInt32 endIndex;
|
|
if (mStartSelectionIndex == kNothingSelected) {
|
|
startIndex = aClickedIndex;
|
|
endIndex = aClickedIndex;
|
|
} else if (mStartSelectionIndex <= aClickedIndex) {
|
|
startIndex = mStartSelectionIndex;
|
|
endIndex = aClickedIndex;
|
|
} else {
|
|
startIndex = aClickedIndex;
|
|
endIndex = mStartSelectionIndex;
|
|
}
|
|
|
|
// Clear only if control was not pressed
|
|
wasChanged = ExtendedSelection(startIndex, endIndex, !aIsControl);
|
|
ScrollToIndex(aClickedIndex);
|
|
|
|
if (mStartSelectionIndex == kNothingSelected) {
|
|
mStartSelectionIndex = aClickedIndex;
|
|
}
|
|
#ifdef ACCESSIBILITY
|
|
bool isCurrentOptionChanged = mEndSelectionIndex != aClickedIndex;
|
|
#endif
|
|
mEndSelectionIndex = aClickedIndex;
|
|
InvalidateFocus();
|
|
|
|
#ifdef ACCESSIBILITY
|
|
if (isCurrentOptionChanged) {
|
|
FireMenuItemActiveEvent();
|
|
}
|
|
#endif
|
|
} else if (aIsControl) {
|
|
wasChanged = SingleSelection(aClickedIndex, PR_TRUE);
|
|
} else {
|
|
wasChanged = SingleSelection(aClickedIndex, PR_FALSE);
|
|
}
|
|
} else {
|
|
wasChanged = SingleSelection(aClickedIndex, PR_FALSE);
|
|
}
|
|
|
|
return wasChanged;
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
bool
|
|
nsListControlFrame::HandleListSelection(nsIDOMEvent* aEvent,
|
|
PRInt32 aClickedIndex)
|
|
{
|
|
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
|
|
bool isShift;
|
|
bool isControl;
|
|
#ifdef XP_MACOSX
|
|
mouseEvent->GetMetaKey(&isControl);
|
|
#else
|
|
mouseEvent->GetCtrlKey(&isControl);
|
|
#endif
|
|
mouseEvent->GetShiftKey(&isShift);
|
|
return PerformSelection(aClickedIndex, isShift, isControl);
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
void
|
|
nsListControlFrame::CaptureMouseEvents(bool aGrabMouseEvents)
|
|
{
|
|
// Currently cocoa widgets use a native popup widget which tracks clicks synchronously,
|
|
// so we never want to do mouse capturing. Note that we only bail if the list
|
|
// is in drop-down mode, and the caller is requesting capture (we let release capture
|
|
// requests go through to ensure that we can release capture requested via other
|
|
// code paths, if any exist).
|
|
if (aGrabMouseEvents && IsInDropDownMode() && nsComboboxControlFrame::ToolkitHasNativePopup())
|
|
return;
|
|
|
|
if (aGrabMouseEvents) {
|
|
nsIPresShell::SetCapturingContent(mContent, CAPTURE_IGNOREALLOWED);
|
|
} else {
|
|
nsIContent* capturingContent = nsIPresShell::GetCapturingContent();
|
|
|
|
bool dropDownIsHidden = false;
|
|
if (IsInDropDownMode()) {
|
|
dropDownIsHidden = !mComboboxFrame->IsDroppedDown();
|
|
}
|
|
if (capturingContent == mContent || dropDownIsHidden) {
|
|
// only clear the capturing content if *we* are the ones doing the
|
|
// capturing (or if the dropdown is hidden, in which case NO-ONE should
|
|
// be capturing anything - it could be a scrollbar inside this listbox
|
|
// which is actually grabbing
|
|
// This shouldn't be necessary. We should simply ensure that events targeting
|
|
// scrollbars are never visible to DOM consumers.
|
|
nsIPresShell::SetCapturingContent(nsnull, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::HandleEvent(nsPresContext* aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aEventStatus);
|
|
|
|
/*const char * desc[] = {"NS_MOUSE_MOVE",
|
|
"NS_MOUSE_LEFT_BUTTON_UP",
|
|
"NS_MOUSE_LEFT_BUTTON_DOWN",
|
|
"<NA>","<NA>","<NA>","<NA>","<NA>","<NA>","<NA>",
|
|
"NS_MOUSE_MIDDLE_BUTTON_UP",
|
|
"NS_MOUSE_MIDDLE_BUTTON_DOWN",
|
|
"<NA>","<NA>","<NA>","<NA>","<NA>","<NA>","<NA>","<NA>",
|
|
"NS_MOUSE_RIGHT_BUTTON_UP",
|
|
"NS_MOUSE_RIGHT_BUTTON_DOWN",
|
|
"NS_MOUSE_ENTER_SYNTH",
|
|
"NS_MOUSE_EXIT_SYNTH",
|
|
"NS_MOUSE_LEFT_DOUBLECLICK",
|
|
"NS_MOUSE_MIDDLE_DOUBLECLICK",
|
|
"NS_MOUSE_RIGHT_DOUBLECLICK",
|
|
"NS_MOUSE_LEFT_CLICK",
|
|
"NS_MOUSE_MIDDLE_CLICK",
|
|
"NS_MOUSE_RIGHT_CLICK"};
|
|
int inx = aEvent->message-NS_MOUSE_MESSAGE_START;
|
|
if (inx >= 0 && inx <= (NS_MOUSE_RIGHT_CLICK-NS_MOUSE_MESSAGE_START)) {
|
|
printf("Mouse in ListFrame %s [%d]\n", desc[inx], aEvent->message);
|
|
} else {
|
|
printf("Mouse in ListFrame <UNKNOWN> [%d]\n", aEvent->message);
|
|
}*/
|
|
|
|
if (nsEventStatus_eConsumeNoDefault == *aEventStatus)
|
|
return NS_OK;
|
|
|
|
// do we have style that affects how we are selected?
|
|
// do we have user-input style?
|
|
const nsStyleUserInterface* uiStyle = GetStyleUserInterface();
|
|
if (uiStyle->mUserInput == NS_STYLE_USER_INPUT_NONE || uiStyle->mUserInput == NS_STYLE_USER_INPUT_DISABLED)
|
|
return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
|
|
|
|
nsEventStates eventStates = mContent->AsElement()->State();
|
|
if (eventStates.HasState(NS_EVENT_STATE_DISABLED))
|
|
return NS_OK;
|
|
|
|
return nsHTMLScrollFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList)
|
|
{
|
|
// First check to see if all the content has been added
|
|
mIsAllContentHere = mContent->IsDoneAddingChildren();
|
|
if (!mIsAllContentHere) {
|
|
mIsAllFramesHere = PR_FALSE;
|
|
mHasBeenInitialized = PR_FALSE;
|
|
}
|
|
nsresult rv = nsHTMLScrollFrame::SetInitialChildList(aListID, aChildList);
|
|
|
|
// If all the content is here now check
|
|
// to see if all the frames have been created
|
|
/*if (mIsAllContentHere) {
|
|
// If all content and frames are here
|
|
// the reset/initialize
|
|
if (CheckIfAllFramesHere()) {
|
|
ResetList(aPresContext);
|
|
mHasBeenInitialized = PR_TRUE;
|
|
}
|
|
}*/
|
|
|
|
return rv;
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
nsresult
|
|
nsListControlFrame::GetSizeAttribute(PRInt32 *aSize) {
|
|
nsresult rv = NS_OK;
|
|
nsIDOMHTMLSelectElement* selectElement;
|
|
rv = mContent->QueryInterface(NS_GET_IID(nsIDOMHTMLSelectElement),(void**) &selectElement);
|
|
if (mContent && NS_SUCCEEDED(rv)) {
|
|
rv = selectElement->GetSize(aSize);
|
|
NS_RELEASE(selectElement);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
nsresult result = nsHTMLScrollFrame::Init(aContent, aParent, aPrevInFlow);
|
|
|
|
// get the receiver interface from the browser button's content node
|
|
NS_ENSURE_STATE(mContent);
|
|
|
|
// we shouldn't have to unregister this listener because when
|
|
// our frame goes away all these content node go away as well
|
|
// because our frame is the only one who references them.
|
|
// we need to hook up our listeners before the editor is initialized
|
|
mEventListener = new nsListEventListener(this);
|
|
if (!mEventListener)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
mContent->AddEventListener(NS_LITERAL_STRING("keypress"), mEventListener,
|
|
PR_FALSE, PR_FALSE);
|
|
mContent->AddEventListener(NS_LITERAL_STRING("mousedown"), mEventListener,
|
|
PR_FALSE, PR_FALSE);
|
|
mContent->AddEventListener(NS_LITERAL_STRING("mouseup"), mEventListener,
|
|
PR_FALSE, PR_FALSE);
|
|
mContent->AddEventListener(NS_LITERAL_STRING("mousemove"), mEventListener,
|
|
PR_FALSE, PR_FALSE);
|
|
|
|
mStartSelectionIndex = kNothingSelected;
|
|
mEndSelectionIndex = kNothingSelected;
|
|
|
|
mLastDropdownBackstopColor = PresContext()->DefaultBackgroundColor();
|
|
|
|
return result;
|
|
}
|
|
|
|
already_AddRefed<nsIContent>
|
|
nsListControlFrame::GetOptionAsContent(nsIDOMHTMLOptionsCollection* aCollection, PRInt32 aIndex)
|
|
{
|
|
nsIContent * content = nsnull;
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement = GetOption(aCollection,
|
|
aIndex);
|
|
|
|
NS_ASSERTION(optionElement != nsnull, "could not get option element by index!");
|
|
|
|
if (optionElement) {
|
|
CallQueryInterface(optionElement, &content);
|
|
}
|
|
|
|
return content;
|
|
}
|
|
|
|
already_AddRefed<nsIContent>
|
|
nsListControlFrame::GetOptionContent(PRInt32 aIndex) const
|
|
|
|
{
|
|
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = GetOptions(mContent);
|
|
NS_ASSERTION(options.get() != nsnull, "Collection of options is null!");
|
|
|
|
if (options) {
|
|
return GetOptionAsContent(options, aIndex);
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
already_AddRefed<nsIDOMHTMLOptionsCollection>
|
|
nsListControlFrame::GetOptions(nsIContent * aContent)
|
|
{
|
|
nsIDOMHTMLOptionsCollection* options = nsnull;
|
|
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement = do_QueryInterface(aContent);
|
|
if (selectElement) {
|
|
selectElement->GetOptions(&options); // AddRefs (1)
|
|
}
|
|
|
|
return options;
|
|
}
|
|
|
|
already_AddRefed<nsIDOMHTMLOptionElement>
|
|
nsListControlFrame::GetOption(nsIDOMHTMLOptionsCollection* aCollection,
|
|
PRInt32 aIndex)
|
|
{
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
if (NS_SUCCEEDED(aCollection->Item(aIndex, getter_AddRefs(node)))) {
|
|
NS_ASSERTION(node,
|
|
"Item was successful, but node from collection was null!");
|
|
if (node) {
|
|
nsIDOMHTMLOptionElement* option = nsnull;
|
|
CallQueryInterface(node, &option);
|
|
|
|
return option;
|
|
}
|
|
} else {
|
|
NS_ERROR("Couldn't get option by index from collection!");
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
bool
|
|
nsListControlFrame::IsContentSelected(nsIContent* aContent) const
|
|
{
|
|
bool isSelected = false;
|
|
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> optEl = do_QueryInterface(aContent);
|
|
if (optEl)
|
|
optEl->GetSelected(&isSelected);
|
|
|
|
return isSelected;
|
|
}
|
|
|
|
bool
|
|
nsListControlFrame::IsContentSelectedByIndex(PRInt32 aIndex) const
|
|
{
|
|
nsCOMPtr<nsIContent> content = GetOptionContent(aIndex);
|
|
NS_ASSERTION(content, "Failed to retrieve option content");
|
|
|
|
return IsContentSelected(content);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::OnOptionSelected(PRInt32 aIndex, bool aSelected)
|
|
{
|
|
if (aSelected) {
|
|
ScrollToIndex(aIndex);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
PRIntn
|
|
nsListControlFrame::GetSkipSides() const
|
|
{
|
|
// Don't skip any sides during border rendering
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::OnContentReset()
|
|
{
|
|
ResetList(PR_TRUE);
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::ResetList(bool aAllowScrolling)
|
|
{
|
|
// if all the frames aren't here
|
|
// don't bother reseting
|
|
if (!mIsAllFramesHere) {
|
|
return;
|
|
}
|
|
|
|
if (aAllowScrolling) {
|
|
mPostChildrenLoadedReset = PR_TRUE;
|
|
|
|
// Scroll to the selected index
|
|
PRInt32 indexToSelect = kNothingSelected;
|
|
|
|
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement(do_QueryInterface(mContent));
|
|
NS_ASSERTION(selectElement, "No select element!");
|
|
if (selectElement) {
|
|
selectElement->GetSelectedIndex(&indexToSelect);
|
|
ScrollToIndex(indexToSelect);
|
|
}
|
|
}
|
|
|
|
mStartSelectionIndex = kNothingSelected;
|
|
mEndSelectionIndex = kNothingSelected;
|
|
InvalidateFocus();
|
|
// Combobox will redisplay itself with the OnOptionSelected event
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::SetFocus(bool aOn, bool aRepaint)
|
|
{
|
|
InvalidateFocus();
|
|
|
|
if (aOn) {
|
|
ComboboxFocusSet();
|
|
mFocused = this;
|
|
} else {
|
|
mFocused = nsnull;
|
|
}
|
|
|
|
InvalidateFocus();
|
|
}
|
|
|
|
void nsListControlFrame::ComboboxFocusSet()
|
|
{
|
|
gLastKeyTime = 0;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::SetComboboxFrame(nsIFrame* aComboboxFrame)
|
|
{
|
|
if (nsnull != aComboboxFrame) {
|
|
mComboboxFrame = do_QueryFrame(aComboboxFrame);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::GetOptionText(PRInt32 aIndex, nsAString & aStr)
|
|
{
|
|
aStr.SetLength(0);
|
|
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = GetOptions(mContent);
|
|
|
|
if (options) {
|
|
PRUint32 numOptions;
|
|
options->GetLength(&numOptions);
|
|
|
|
if (numOptions != 0) {
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement =
|
|
GetOption(options, aIndex);
|
|
if (optionElement) {
|
|
#if 0 // This is for turning off labels Bug 4050
|
|
nsAutoString text;
|
|
optionElement->GetLabel(text);
|
|
// the return value is always NS_OK from DOMElements
|
|
// it is meaningless to check for it
|
|
if (!text.IsEmpty()) {
|
|
nsAutoString compressText = text;
|
|
compressText.CompressWhitespace(PR_TRUE, PR_TRUE);
|
|
if (!compressText.IsEmpty()) {
|
|
text = compressText;
|
|
}
|
|
}
|
|
|
|
if (text.IsEmpty()) {
|
|
// the return value is always NS_OK from DOMElements
|
|
// it is meaningless to check for it
|
|
optionElement->GetText(text);
|
|
}
|
|
aStr = text;
|
|
#else
|
|
optionElement->GetText(aStr);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
PRInt32
|
|
nsListControlFrame::GetSelectedIndex()
|
|
{
|
|
PRInt32 aIndex;
|
|
|
|
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement(do_QueryInterface(mContent));
|
|
selectElement->GetSelectedIndex(&aIndex);
|
|
|
|
return aIndex;
|
|
}
|
|
|
|
already_AddRefed<nsIContent>
|
|
nsListControlFrame::GetCurrentOption()
|
|
{
|
|
// The mEndSelectionIndex is what is currently being selected. Use
|
|
// the selected index if this is kNothingSelected.
|
|
PRInt32 focusedIndex = (mEndSelectionIndex == kNothingSelected) ?
|
|
GetSelectedIndex() : mEndSelectionIndex;
|
|
|
|
if (focusedIndex != kNothingSelected) {
|
|
return GetOptionContent(focusedIndex);
|
|
}
|
|
|
|
nsRefPtr<nsHTMLSelectElement> selectElement =
|
|
nsHTMLSelectElement::FromContent(mContent);
|
|
NS_ASSERTION(selectElement, "Can't be null");
|
|
|
|
// There is no a selected item return the first non-disabled item and skip all
|
|
// the option group elements.
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
|
|
PRUint32 length;
|
|
selectElement->GetLength(&length);
|
|
if (length) {
|
|
bool isDisabled = true;
|
|
for (PRUint32 i = 0; i < length && isDisabled; i++) {
|
|
if (NS_FAILED(selectElement->Item(i, getter_AddRefs(node))) || !node) {
|
|
break;
|
|
}
|
|
if (NS_FAILED(selectElement->IsOptionDisabled(i, &isDisabled))) {
|
|
break;
|
|
}
|
|
if (isDisabled) {
|
|
node = nsnull;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (!node) {
|
|
return nsnull;
|
|
}
|
|
}
|
|
|
|
if (node) {
|
|
nsCOMPtr<nsIContent> focusedOption = do_QueryInterface(node);
|
|
return focusedOption.forget();
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
bool
|
|
nsListControlFrame::IsInDropDownMode() const
|
|
{
|
|
return (mComboboxFrame != nsnull);
|
|
}
|
|
|
|
PRInt32
|
|
nsListControlFrame::GetNumberOfOptions()
|
|
{
|
|
if (mContent != nsnull) {
|
|
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = GetOptions(mContent);
|
|
|
|
if (!options) {
|
|
return 0;
|
|
} else {
|
|
PRUint32 length = 0;
|
|
options->GetLength(&length);
|
|
return (PRInt32)length;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// nsISelectControlFrame
|
|
//----------------------------------------------------------------------
|
|
bool nsListControlFrame::CheckIfAllFramesHere()
|
|
{
|
|
// Get the number of optgroups and options
|
|
//PRInt32 numContentItems = 0;
|
|
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));
|
|
if (node) {
|
|
// XXX Need to find a fail proff way to determine that
|
|
// all the frames are there
|
|
mIsAllFramesHere = PR_TRUE;//NS_OK == CountAllChild(node, numContentItems);
|
|
}
|
|
// now make sure we have a frame each piece of content
|
|
|
|
return mIsAllFramesHere;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::DoneAddingChildren(bool aIsDone)
|
|
{
|
|
mIsAllContentHere = aIsDone;
|
|
if (mIsAllContentHere) {
|
|
// Here we check to see if all the frames have been created
|
|
// for all the content.
|
|
// If so, then we can initialize;
|
|
if (!mIsAllFramesHere) {
|
|
// if all the frames are now present we can initialize
|
|
if (CheckIfAllFramesHere()) {
|
|
mHasBeenInitialized = PR_TRUE;
|
|
ResetList(PR_TRUE);
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::AddOption(PRInt32 aIndex)
|
|
{
|
|
#ifdef DO_REFLOW_DEBUG
|
|
printf("---- Id: %d nsLCF %p Added Option %d\n", mReflowId, this, aIndex);
|
|
#endif
|
|
|
|
if (!mIsAllContentHere) {
|
|
mIsAllContentHere = mContent->IsDoneAddingChildren();
|
|
if (!mIsAllContentHere) {
|
|
mIsAllFramesHere = PR_FALSE;
|
|
mHasBeenInitialized = PR_FALSE;
|
|
} else {
|
|
mIsAllFramesHere = (aIndex == GetNumberOfOptions()-1);
|
|
}
|
|
}
|
|
|
|
// Make sure we scroll to the selected option as needed
|
|
mNeedToReset = PR_TRUE;
|
|
|
|
if (!mHasBeenInitialized) {
|
|
return NS_OK;
|
|
}
|
|
|
|
mPostChildrenLoadedReset = mIsAllContentHere;
|
|
return NS_OK;
|
|
}
|
|
|
|
static PRInt32
|
|
DecrementAndClamp(PRInt32 aSelectionIndex, PRInt32 aLength)
|
|
{
|
|
return aLength == 0 ? kNothingSelected : NS_MAX(0, aSelectionIndex - 1);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::RemoveOption(PRInt32 aIndex)
|
|
{
|
|
NS_PRECONDITION(aIndex >= 0, "negative <option> index");
|
|
|
|
// Need to reset if we're a dropdown
|
|
if (IsInDropDownMode()) {
|
|
mNeedToReset = PR_TRUE;
|
|
mPostChildrenLoadedReset = mIsAllContentHere;
|
|
}
|
|
|
|
if (mStartSelectionIndex != kNothingSelected) {
|
|
NS_ASSERTION(mEndSelectionIndex != kNothingSelected, "");
|
|
PRInt32 numOptions = GetNumberOfOptions();
|
|
// NOTE: numOptions is the new number of options whereas aIndex is the
|
|
// unadjusted index of the removed option (hence the <= below).
|
|
NS_ASSERTION(aIndex <= numOptions, "out-of-bounds <option> index");
|
|
|
|
PRInt32 forward = mEndSelectionIndex - mStartSelectionIndex;
|
|
PRInt32* low = forward >= 0 ? &mStartSelectionIndex : &mEndSelectionIndex;
|
|
PRInt32* high = forward >= 0 ? &mEndSelectionIndex : &mStartSelectionIndex;
|
|
if (aIndex < *low)
|
|
*low = ::DecrementAndClamp(*low, numOptions);
|
|
if (aIndex <= *high)
|
|
*high = ::DecrementAndClamp(*high, numOptions);
|
|
if (forward == 0)
|
|
*low = *high;
|
|
}
|
|
else
|
|
NS_ASSERTION(mEndSelectionIndex == kNothingSelected, "");
|
|
|
|
InvalidateFocus();
|
|
return NS_OK;
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
// Set the option selected in the DOM. This method is named
|
|
// as it is because it indicates that the frame is the source
|
|
// of this event rather than the receiver.
|
|
bool
|
|
nsListControlFrame::SetOptionsSelectedFromFrame(PRInt32 aStartIndex,
|
|
PRInt32 aEndIndex,
|
|
bool aValue,
|
|
bool aClearAll)
|
|
{
|
|
nsRefPtr<nsHTMLSelectElement> selectElement =
|
|
nsHTMLSelectElement::FromContent(mContent);
|
|
bool wasChanged = false;
|
|
#ifdef DEBUG
|
|
nsresult rv =
|
|
#endif
|
|
selectElement->SetOptionsSelectedByIndex(aStartIndex,
|
|
aEndIndex,
|
|
aValue,
|
|
aClearAll,
|
|
PR_FALSE,
|
|
PR_TRUE,
|
|
&wasChanged);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "SetSelected failed");
|
|
return wasChanged;
|
|
}
|
|
|
|
bool
|
|
nsListControlFrame::ToggleOptionSelectedFromFrame(PRInt32 aIndex)
|
|
{
|
|
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = GetOptions(mContent);
|
|
NS_ASSERTION(options, "No options");
|
|
if (!options) {
|
|
return PR_FALSE;
|
|
}
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> option = GetOption(options, aIndex);
|
|
NS_ASSERTION(option, "No option");
|
|
if (!option) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
bool value = false;
|
|
#ifdef DEBUG
|
|
nsresult rv =
|
|
#endif
|
|
option->GetSelected(&value);
|
|
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "GetSelected failed");
|
|
nsRefPtr<nsHTMLSelectElement> selectElement =
|
|
nsHTMLSelectElement::FromContent(mContent);
|
|
bool wasChanged = false;
|
|
#ifdef DEBUG
|
|
rv =
|
|
#endif
|
|
selectElement->SetOptionsSelectedByIndex(aIndex,
|
|
aIndex,
|
|
!value,
|
|
PR_FALSE,
|
|
PR_FALSE,
|
|
PR_TRUE,
|
|
&wasChanged);
|
|
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "SetSelected failed");
|
|
|
|
return wasChanged;
|
|
}
|
|
|
|
|
|
// Dispatch event and such
|
|
bool
|
|
nsListControlFrame::UpdateSelection()
|
|
{
|
|
if (mIsAllFramesHere) {
|
|
// if it's a combobox, display the new text
|
|
nsWeakFrame weakFrame(this);
|
|
if (mComboboxFrame) {
|
|
mComboboxFrame->RedisplaySelectedText();
|
|
}
|
|
// if it's a listbox, fire on change
|
|
else if (mIsAllContentHere) {
|
|
FireOnChange();
|
|
}
|
|
return weakFrame.IsAlive();
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::ComboboxFinish(PRInt32 aIndex)
|
|
{
|
|
gLastKeyTime = 0;
|
|
|
|
if (mComboboxFrame) {
|
|
PerformSelection(aIndex, PR_FALSE, PR_FALSE);
|
|
|
|
PRInt32 displayIndex = mComboboxFrame->GetIndexOfDisplayArea();
|
|
|
|
nsWeakFrame weakFrame(this);
|
|
|
|
if (displayIndex != aIndex) {
|
|
mComboboxFrame->RedisplaySelectedText(); // might destroy us
|
|
}
|
|
|
|
if (weakFrame.IsAlive() && mComboboxFrame) {
|
|
mComboboxFrame->RollupFromList(); // might destroy us
|
|
}
|
|
}
|
|
}
|
|
|
|
// Send out an onchange notification.
|
|
void
|
|
nsListControlFrame::FireOnChange()
|
|
{
|
|
if (mComboboxFrame) {
|
|
// Return hit without changing anything
|
|
PRInt32 index = mComboboxFrame->UpdateRecentIndex(NS_SKIP_NOTIFY_INDEX);
|
|
if (index == NS_SKIP_NOTIFY_INDEX)
|
|
return;
|
|
|
|
// See if the selection actually changed
|
|
if (index == GetSelectedIndex())
|
|
return;
|
|
}
|
|
|
|
// Dispatch the change event.
|
|
nsContentUtils::DispatchTrustedEvent(mContent->GetOwnerDoc(), mContent,
|
|
NS_LITERAL_STRING("change"), PR_TRUE,
|
|
PR_FALSE);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex)
|
|
{
|
|
if (mComboboxFrame) {
|
|
// UpdateRecentIndex with NS_SKIP_NOTIFY_INDEX, so that we won't fire an onchange
|
|
// event for this setting of selectedIndex.
|
|
mComboboxFrame->UpdateRecentIndex(NS_SKIP_NOTIFY_INDEX);
|
|
}
|
|
|
|
ScrollToIndex(aNewIndex);
|
|
mStartSelectionIndex = aNewIndex;
|
|
mEndSelectionIndex = aNewIndex;
|
|
InvalidateFocus();
|
|
|
|
#ifdef ACCESSIBILITY
|
|
FireMenuItemActiveEvent();
|
|
#endif
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// End nsISelectControlFrame
|
|
//----------------------------------------------------------------------
|
|
|
|
nsresult
|
|
nsListControlFrame::SetFormProperty(nsIAtom* aName,
|
|
const nsAString& aValue)
|
|
{
|
|
if (nsGkAtoms::selected == aName) {
|
|
return NS_ERROR_INVALID_ARG; // Selected is readonly according to spec.
|
|
} else if (nsGkAtoms::selectedindex == aName) {
|
|
// You shouldn't be calling me for this!!!
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
// We should be told about selectedIndex by the DOM element through
|
|
// OnOptionSelected
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
|
|
{
|
|
// Get the selected value of option from local cache (optimization vs. widget)
|
|
if (nsGkAtoms::selected == aName) {
|
|
nsAutoString val(aValue);
|
|
PRInt32 error = 0;
|
|
bool selected = false;
|
|
PRInt32 indx = val.ToInteger(&error, 10); // Get index from aValue
|
|
if (error == 0)
|
|
selected = IsContentSelectedByIndex(indx);
|
|
|
|
aValue.Assign(selected ? NS_LITERAL_STRING("1") : NS_LITERAL_STRING("0"));
|
|
|
|
// For selectedIndex, get the value from the widget
|
|
} else if (nsGkAtoms::selectedindex == aName) {
|
|
// You shouldn't be calling me for this!!!
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::SyncViewWithFrame()
|
|
{
|
|
// Resync the view's position with the frame.
|
|
// The problem is the dropdown's view is attached directly under
|
|
// the root view. This means its view needs to have its coordinates calculated
|
|
// as if it were in it's normal position in the view hierarchy.
|
|
mComboboxFrame->AbsolutelyPositionDropDown();
|
|
|
|
nsContainerFrame::PositionFrameView(this);
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::AboutToDropDown()
|
|
{
|
|
NS_ASSERTION(IsInDropDownMode(),
|
|
"AboutToDropDown called without being in dropdown mode");
|
|
|
|
// Our widget doesn't get invalidated on changes to the rest of the document,
|
|
// so compute and store this color at the start of a dropdown so we don't
|
|
// get weird painting behaviour.
|
|
// We start looking for backgrounds above the combobox frame to avoid
|
|
// duplicating the combobox frame's background and compose each background
|
|
// color we find underneath until we have an opaque color, or run out of
|
|
// backgrounds. We compose with the PresContext default background color,
|
|
// which is always opaque, in case we don't end up with an opaque color.
|
|
// This gives us a very poor approximation of translucency.
|
|
nsIFrame* comboboxFrame = do_QueryFrame(mComboboxFrame);
|
|
nsStyleContext* context = comboboxFrame->GetStyleContext()->GetParent();
|
|
mLastDropdownBackstopColor = NS_RGBA(0,0,0,0);
|
|
while (NS_GET_A(mLastDropdownBackstopColor) < 255 && context) {
|
|
mLastDropdownBackstopColor =
|
|
NS_ComposeColors(context->GetStyleBackground()->mBackgroundColor,
|
|
mLastDropdownBackstopColor);
|
|
context = context->GetParent();
|
|
}
|
|
mLastDropdownBackstopColor =
|
|
NS_ComposeColors(PresContext()->DefaultBackgroundColor(),
|
|
mLastDropdownBackstopColor);
|
|
|
|
if (mIsAllContentHere && mIsAllFramesHere && mHasBeenInitialized) {
|
|
ScrollToIndex(GetSelectedIndex());
|
|
#ifdef ACCESSIBILITY
|
|
FireMenuItemActiveEvent(); // Inform assistive tech what got focus
|
|
#endif
|
|
}
|
|
mItemSelectionStarted = PR_FALSE;
|
|
}
|
|
|
|
// We are about to be rolledup from the outside (ComboboxFrame)
|
|
void
|
|
nsListControlFrame::AboutToRollup()
|
|
{
|
|
// We've been updating the combobox with the keyboard up until now, but not
|
|
// with the mouse. The problem is, even with mouse selection, we are
|
|
// updating the <select>. So if the mouse goes over an option just before
|
|
// he leaves the box and clicks, that's what the <select> will show.
|
|
//
|
|
// To deal with this we say "whatever is in the combobox is canonical."
|
|
// - IF the combobox is different from the current selected index, we
|
|
// reset the index.
|
|
|
|
if (IsInDropDownMode()) {
|
|
ComboboxFinish(mComboboxFrame->GetIndexOfDisplayArea()); // might destroy us
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::DidReflow(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState* aReflowState,
|
|
nsDidReflowStatus aStatus)
|
|
{
|
|
nsresult rv;
|
|
bool wasInterrupted = !mHasPendingInterruptAtStartOfReflow &&
|
|
aPresContext->HasPendingInterrupt();
|
|
|
|
if (IsInDropDownMode())
|
|
{
|
|
//SyncViewWithFrame();
|
|
rv = nsHTMLScrollFrame::DidReflow(aPresContext, aReflowState, aStatus);
|
|
SyncViewWithFrame();
|
|
} else {
|
|
rv = nsHTMLScrollFrame::DidReflow(aPresContext, aReflowState, aStatus);
|
|
}
|
|
|
|
if (mNeedToReset && !wasInterrupted) {
|
|
mNeedToReset = PR_FALSE;
|
|
// Suppress scrolling to the selected element if we restored
|
|
// scroll history state AND the list contents have not changed
|
|
// since we loaded all the children AND nothing else forced us
|
|
// to scroll by calling ResetList(PR_TRUE). The latter two conditions
|
|
// are folded into mPostChildrenLoadedReset.
|
|
//
|
|
// The idea is that we want scroll history restoration to trump ResetList
|
|
// scrolling to the selected element, when the ResetList was probably only
|
|
// caused by content loading normally.
|
|
ResetList(!DidHistoryRestore() || mPostChildrenLoadedReset);
|
|
}
|
|
|
|
mHasPendingInterruptAtStartOfReflow = PR_FALSE;
|
|
return rv;
|
|
}
|
|
|
|
nsIAtom*
|
|
nsListControlFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::listControlFrame;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::InvalidateInternal(const nsRect& aDamageRect,
|
|
nscoord aX, nscoord aY, nsIFrame* aForChild,
|
|
PRUint32 aFlags)
|
|
{
|
|
if (!IsInDropDownMode()) {
|
|
nsHTMLScrollFrame::InvalidateInternal(aDamageRect, aX, aY, this, aFlags);
|
|
return;
|
|
}
|
|
InvalidateRoot(aDamageRect + nsPoint(aX, aY), aFlags);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsListControlFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("ListControl"), aResult);
|
|
}
|
|
#endif
|
|
|
|
nscoord
|
|
nsListControlFrame::GetHeightOfARow()
|
|
{
|
|
return HeightOfARow();
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::IsOptionDisabled(PRInt32 anIndex, bool &aIsDisabled)
|
|
{
|
|
nsRefPtr<nsHTMLSelectElement> sel =
|
|
nsHTMLSelectElement::FromContent(mContent);
|
|
if (sel) {
|
|
sel->IsOptionDisabled(anIndex, &aIsDisabled);
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// helper
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
nsListControlFrame::IsLeftButton(nsIDOMEvent* aMouseEvent)
|
|
{
|
|
// only allow selection with the left button
|
|
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
|
|
if (mouseEvent) {
|
|
PRUint16 whichButton;
|
|
if (NS_SUCCEEDED(mouseEvent->GetButton(&whichButton))) {
|
|
return whichButton != 0?PR_FALSE:PR_TRUE;
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nscoord
|
|
nsListControlFrame::CalcFallbackRowHeight()
|
|
{
|
|
nscoord rowHeight = 0;
|
|
|
|
nsRefPtr<nsFontMetrics> fontMet;
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet));
|
|
if (fontMet) {
|
|
rowHeight = fontMet->MaxHeight();
|
|
}
|
|
|
|
return rowHeight;
|
|
}
|
|
|
|
nscoord
|
|
nsListControlFrame::CalcIntrinsicHeight(nscoord aHeightOfARow,
|
|
PRInt32 aNumberOfOptions)
|
|
{
|
|
NS_PRECONDITION(!IsInDropDownMode(),
|
|
"Shouldn't be in dropdown mode when we call this");
|
|
|
|
mNumDisplayRows = 1;
|
|
GetSizeAttribute(&mNumDisplayRows);
|
|
|
|
if (mNumDisplayRows < 1) {
|
|
mNumDisplayRows = 4;
|
|
}
|
|
|
|
return mNumDisplayRows * aHeightOfARow;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// nsIDOMMouseListener
|
|
//----------------------------------------------------------------------
|
|
nsresult
|
|
nsListControlFrame::MouseUp(nsIDOMEvent* aMouseEvent)
|
|
{
|
|
NS_ASSERTION(aMouseEvent != nsnull, "aMouseEvent is null.");
|
|
|
|
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
|
|
NS_ENSURE_TRUE(mouseEvent, NS_ERROR_FAILURE);
|
|
|
|
UpdateInListState(aMouseEvent);
|
|
|
|
mButtonDown = PR_FALSE;
|
|
|
|
nsEventStates eventStates = mContent->AsElement()->State();
|
|
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// only allow selection with the left button
|
|
// if a right button click is on the combobox itself
|
|
// or on the select when in listbox mode, then let the click through
|
|
if (!IsLeftButton(aMouseEvent)) {
|
|
if (IsInDropDownMode()) {
|
|
if (!IgnoreMouseEventForSelection(aMouseEvent)) {
|
|
aMouseEvent->PreventDefault();
|
|
aMouseEvent->StopPropagation();
|
|
} else {
|
|
CaptureMouseEvents(PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
CaptureMouseEvents(PR_FALSE);
|
|
return NS_ERROR_FAILURE; // means consume event
|
|
} else {
|
|
CaptureMouseEvents(PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
const nsStyleVisibility* vis = GetStyleVisibility();
|
|
|
|
if (!vis->IsVisible()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (IsInDropDownMode()) {
|
|
// XXX This is a bit of a hack, but.....
|
|
// But the idea here is to make sure you get an "onclick" event when you mouse
|
|
// down on the select and the drag over an option and let go
|
|
// And then NOT get an "onclick" event when when you click down on the select
|
|
// and then up outside of the select
|
|
// the EventStateManager tracks the content of the mouse down and the mouse up
|
|
// to make sure they are the same, and the onclick is sent in the PostHandleEvent
|
|
// depeneding on whether the clickCount is non-zero.
|
|
// So we cheat here by either setting or unsetting the clcikCount in the native event
|
|
// so the right thing happens for the onclick event
|
|
nsCOMPtr<nsIPrivateDOMEvent> privateEvent(do_QueryInterface(aMouseEvent));
|
|
nsMouseEvent * mouseEvent;
|
|
mouseEvent = (nsMouseEvent *) privateEvent->GetInternalNSEvent();
|
|
|
|
PRInt32 selectedIndex;
|
|
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, selectedIndex))) {
|
|
// If it's disabled, disallow the click and leave.
|
|
bool isDisabled = false;
|
|
IsOptionDisabled(selectedIndex, isDisabled);
|
|
if (isDisabled) {
|
|
aMouseEvent->PreventDefault();
|
|
aMouseEvent->StopPropagation();
|
|
CaptureMouseEvents(PR_FALSE);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (kNothingSelected != selectedIndex) {
|
|
nsWeakFrame weakFrame(this);
|
|
ComboboxFinish(selectedIndex);
|
|
if (!weakFrame.IsAlive())
|
|
return NS_OK;
|
|
FireOnChange();
|
|
}
|
|
|
|
mouseEvent->clickCount = 1;
|
|
} else {
|
|
// the click was out side of the select or its dropdown
|
|
mouseEvent->clickCount = IgnoreMouseEventForSelection(aMouseEvent) ? 1 : 0;
|
|
}
|
|
} else {
|
|
CaptureMouseEvents(PR_FALSE);
|
|
// Notify
|
|
if (mChangesSinceDragStart) {
|
|
// reset this so that future MouseUps without a prior MouseDown
|
|
// won't fire onchange
|
|
mChangesSinceDragStart = PR_FALSE;
|
|
FireOnChange();
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::UpdateInListState(nsIDOMEvent* aEvent)
|
|
{
|
|
if (!mComboboxFrame || !mComboboxFrame->IsDroppedDown())
|
|
return;
|
|
|
|
nsPoint pt = nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(aEvent, this);
|
|
nsRect borderInnerEdge = GetScrollPortRect();
|
|
if (pt.y >= borderInnerEdge.y && pt.y < borderInnerEdge.YMost()) {
|
|
mItemSelectionStarted = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
bool nsListControlFrame::IgnoreMouseEventForSelection(nsIDOMEvent* aEvent)
|
|
{
|
|
if (!mComboboxFrame)
|
|
return PR_FALSE;
|
|
|
|
// Our DOM listener does get called when the dropdown is not
|
|
// showing, because it listens to events on the SELECT element
|
|
if (!mComboboxFrame->IsDroppedDown())
|
|
return PR_TRUE;
|
|
|
|
return !mItemSelectionStarted;
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
void
|
|
nsListControlFrame::FireMenuItemActiveEvent()
|
|
{
|
|
if (mFocused != this && !IsInDropDownMode()) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> optionContent = GetCurrentOption();
|
|
if (!optionContent) {
|
|
return;
|
|
}
|
|
|
|
FireDOMEvent(NS_LITERAL_STRING("DOMMenuItemActive"), optionContent);
|
|
}
|
|
#endif
|
|
|
|
nsresult
|
|
nsListControlFrame::GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent,
|
|
PRInt32& aCurIndex)
|
|
{
|
|
if (IgnoreMouseEventForSelection(aMouseEvent))
|
|
return NS_ERROR_FAILURE;
|
|
|
|
if (nsIPresShell::GetCapturingContent() != mContent) {
|
|
// If we're not capturing, then ignore movement in the border
|
|
nsPoint pt = nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(aMouseEvent, this);
|
|
nsRect borderInnerEdge = GetScrollPortRect();
|
|
if (!borderInnerEdge.Contains(pt)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> content = PresContext()->EventStateManager()->
|
|
GetEventTargetContent(nsnull);
|
|
|
|
nsCOMPtr<nsIContent> optionContent = GetOptionFromContent(content);
|
|
if (optionContent) {
|
|
aCurIndex = GetIndexFromContent(optionContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRInt32 numOptions = GetNumberOfOptions();
|
|
if (numOptions < 1)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
nsPoint pt = nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(aMouseEvent, this);
|
|
|
|
// If the event coordinate is above the first option frame, then target the
|
|
// first option frame
|
|
nsCOMPtr<nsIContent> firstOption = GetOptionContent(0);
|
|
NS_ASSERTION(firstOption, "Can't find first option that's supposed to be there");
|
|
nsIFrame* optionFrame = firstOption->GetPrimaryFrame();
|
|
if (optionFrame) {
|
|
nsPoint ptInOptionFrame = pt - optionFrame->GetOffsetTo(this);
|
|
if (ptInOptionFrame.y < 0 && ptInOptionFrame.x >= 0 &&
|
|
ptInOptionFrame.x < optionFrame->GetSize().width) {
|
|
aCurIndex = 0;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> lastOption = GetOptionContent(numOptions - 1);
|
|
// If the event coordinate is below the last option frame, then target the
|
|
// last option frame
|
|
NS_ASSERTION(lastOption, "Can't find last option that's supposed to be there");
|
|
optionFrame = lastOption->GetPrimaryFrame();
|
|
if (optionFrame) {
|
|
nsPoint ptInOptionFrame = pt - optionFrame->GetOffsetTo(this);
|
|
if (ptInOptionFrame.y >= optionFrame->GetSize().height && ptInOptionFrame.x >= 0 &&
|
|
ptInOptionFrame.x < optionFrame->GetSize().width) {
|
|
aCurIndex = numOptions - 1;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::MouseDown(nsIDOMEvent* aMouseEvent)
|
|
{
|
|
NS_ASSERTION(aMouseEvent != nsnull, "aMouseEvent is null.");
|
|
|
|
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
|
|
NS_ENSURE_TRUE(mouseEvent, NS_ERROR_FAILURE);
|
|
|
|
UpdateInListState(aMouseEvent);
|
|
|
|
nsEventStates eventStates = mContent->AsElement()->State();
|
|
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// only allow selection with the left button
|
|
// if a right button click is on the combobox itself
|
|
// or on the select when in listbox mode, then let the click through
|
|
if (!IsLeftButton(aMouseEvent)) {
|
|
if (IsInDropDownMode()) {
|
|
if (!IgnoreMouseEventForSelection(aMouseEvent)) {
|
|
aMouseEvent->PreventDefault();
|
|
aMouseEvent->StopPropagation();
|
|
} else {
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_FAILURE; // means consume event
|
|
} else {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
PRInt32 selectedIndex;
|
|
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, selectedIndex))) {
|
|
// Handle Like List
|
|
mButtonDown = PR_TRUE;
|
|
CaptureMouseEvents(PR_TRUE);
|
|
mChangesSinceDragStart = HandleListSelection(aMouseEvent, selectedIndex);
|
|
} else {
|
|
// NOTE: the combo box is responsible for dropping it down
|
|
if (mComboboxFrame) {
|
|
if (!IgnoreMouseEventForSelection(aMouseEvent)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!nsComboboxControlFrame::ToolkitHasNativePopup())
|
|
{
|
|
bool isDroppedDown = mComboboxFrame->IsDroppedDown();
|
|
nsIFrame* comboFrame = do_QueryFrame(mComboboxFrame);
|
|
nsWeakFrame weakFrame(comboFrame);
|
|
mComboboxFrame->ShowDropDown(!isDroppedDown);
|
|
if (!weakFrame.IsAlive())
|
|
return NS_OK;
|
|
if (isDroppedDown) {
|
|
CaptureMouseEvents(PR_FALSE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// nsIDOMMouseMotionListener
|
|
//----------------------------------------------------------------------
|
|
nsresult
|
|
nsListControlFrame::MouseMove(nsIDOMEvent* aMouseEvent)
|
|
{
|
|
NS_ASSERTION(aMouseEvent, "aMouseEvent is null.");
|
|
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
|
|
NS_ENSURE_TRUE(mouseEvent, NS_ERROR_FAILURE);
|
|
|
|
UpdateInListState(aMouseEvent);
|
|
|
|
if (IsInDropDownMode()) {
|
|
if (mComboboxFrame->IsDroppedDown()) {
|
|
PRInt32 selectedIndex;
|
|
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, selectedIndex))) {
|
|
PerformSelection(selectedIndex, PR_FALSE, PR_FALSE);
|
|
}
|
|
}
|
|
} else {// XXX - temporary until we get drag events
|
|
if (mButtonDown) {
|
|
return DragMove(aMouseEvent);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::DragMove(nsIDOMEvent* aMouseEvent)
|
|
{
|
|
NS_ASSERTION(aMouseEvent, "aMouseEvent is null.");
|
|
|
|
UpdateInListState(aMouseEvent);
|
|
|
|
if (!IsInDropDownMode()) {
|
|
PRInt32 selectedIndex;
|
|
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, selectedIndex))) {
|
|
// Don't waste cycles if we already dragged over this item
|
|
if (selectedIndex == mEndSelectionIndex) {
|
|
return NS_OK;
|
|
}
|
|
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
|
|
NS_ASSERTION(mouseEvent, "aMouseEvent is not an nsIDOMMouseEvent!");
|
|
bool isControl;
|
|
#ifdef XP_MACOSX
|
|
mouseEvent->GetMetaKey(&isControl);
|
|
#else
|
|
mouseEvent->GetCtrlKey(&isControl);
|
|
#endif
|
|
// Turn SHIFT on when you are dragging, unless control is on.
|
|
bool wasChanged = PerformSelection(selectedIndex,
|
|
!isControl, isControl);
|
|
mChangesSinceDragStart = mChangesSinceDragStart || wasChanged;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Scroll helpers.
|
|
//----------------------------------------------------------------------
|
|
nsresult
|
|
nsListControlFrame::ScrollToIndex(PRInt32 aIndex)
|
|
{
|
|
if (aIndex < 0) {
|
|
// XXX shouldn't we just do nothing if we're asked to scroll to
|
|
// kNothingSelected?
|
|
return ScrollToFrame(nsnull);
|
|
} else {
|
|
nsCOMPtr<nsIContent> content = GetOptionContent(aIndex);
|
|
if (content) {
|
|
return ScrollToFrame(content);
|
|
}
|
|
}
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::ScrollToFrame(nsIContent* aOptElement)
|
|
{
|
|
// if null is passed in we scroll to 0,0
|
|
if (nsnull == aOptElement) {
|
|
ScrollTo(nsPoint(0, 0), nsIScrollableFrame::INSTANT);
|
|
return NS_OK;
|
|
}
|
|
|
|
// otherwise we find the content's frame and scroll to it
|
|
nsIFrame *childFrame = aOptElement->GetPrimaryFrame();
|
|
if (childFrame) {
|
|
nsPoint pt = GetScrollPosition();
|
|
// get the scroll port rect relative to the scrolled frame
|
|
nsRect rect = GetScrollPortRect() + pt;
|
|
// get the option's rect relative to the scrolled frame
|
|
nsRect fRect(childFrame->GetOffsetTo(GetScrolledFrame()),
|
|
childFrame->GetSize());
|
|
|
|
// See if the selected frame (fRect) is inside the scrollport
|
|
// area (rect). Check only the vertical dimension. Don't
|
|
// scroll just because there's horizontal overflow.
|
|
if (!(rect.y <= fRect.y && fRect.YMost() <= rect.YMost())) {
|
|
// figure out which direction we are going
|
|
if (fRect.YMost() > rect.YMost()) {
|
|
pt.y = fRect.y - (rect.height - fRect.height);
|
|
} else {
|
|
pt.y = fRect.y;
|
|
}
|
|
ScrollTo(nsPoint(fRect.x, pt.y), nsIScrollableFrame::INSTANT);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//---------------------------------------------------------------------
|
|
// Ok, the entire idea of this routine is to move to the next item that
|
|
// is suppose to be selected. If the item is disabled then we search in
|
|
// the same direction looking for the next item to select. If we run off
|
|
// the end of the list then we start at the end of the list and search
|
|
// backwards until we get back to the original item or an enabled option
|
|
//
|
|
// aStartIndex - the index to start searching from
|
|
// aNewIndex - will get set to the new index if it finds one
|
|
// aNumOptions - the total number of options in the list
|
|
// aDoAdjustInc - the initial increment 1-n
|
|
// aDoAdjustIncNext - the increment used to search for the next enabled option
|
|
//
|
|
// the aDoAdjustInc could be a "1" for a single item or
|
|
// any number greater representing a page of items
|
|
//
|
|
void
|
|
nsListControlFrame::AdjustIndexForDisabledOpt(PRInt32 aStartIndex,
|
|
PRInt32 &aNewIndex,
|
|
PRInt32 aNumOptions,
|
|
PRInt32 aDoAdjustInc,
|
|
PRInt32 aDoAdjustIncNext)
|
|
{
|
|
// Cannot select anything if there is nothing to select
|
|
if (aNumOptions == 0) {
|
|
aNewIndex = kNothingSelected;
|
|
return;
|
|
}
|
|
|
|
// means we reached the end of the list and now we are searching backwards
|
|
bool doingReverse = false;
|
|
// lowest index in the search range
|
|
PRInt32 bottom = 0;
|
|
// highest index in the search range
|
|
PRInt32 top = aNumOptions;
|
|
|
|
// Start off keyboard options at selectedIndex if nothing else is defaulted to
|
|
//
|
|
// XXX Perhaps this should happen for mouse too, to start off shift click
|
|
// automatically in multiple ... to do this, we'd need to override
|
|
// OnOptionSelected and set mStartSelectedIndex if nothing is selected. Not
|
|
// sure of the effects, though, so I'm not doing it just yet.
|
|
PRInt32 startIndex = aStartIndex;
|
|
if (startIndex < bottom) {
|
|
startIndex = GetSelectedIndex();
|
|
}
|
|
PRInt32 newIndex = startIndex + aDoAdjustInc;
|
|
|
|
// make sure we start off in the range
|
|
if (newIndex < bottom) {
|
|
newIndex = 0;
|
|
} else if (newIndex >= top) {
|
|
newIndex = aNumOptions-1;
|
|
}
|
|
|
|
while (1) {
|
|
// if the newIndex isn't disabled, we are golden, bail out
|
|
bool isDisabled = true;
|
|
if (NS_SUCCEEDED(IsOptionDisabled(newIndex, isDisabled)) && !isDisabled) {
|
|
break;
|
|
}
|
|
|
|
// it WAS disabled, so sart looking ahead for the next enabled option
|
|
newIndex += aDoAdjustIncNext;
|
|
|
|
// well, if we reach end reverse the search
|
|
if (newIndex < bottom) {
|
|
if (doingReverse) {
|
|
return; // if we are in reverse mode and reach the end bail out
|
|
} else {
|
|
// reset the newIndex to the end of the list we hit
|
|
// reverse the incrementer
|
|
// set the other end of the list to our original starting index
|
|
newIndex = bottom;
|
|
aDoAdjustIncNext = 1;
|
|
doingReverse = PR_TRUE;
|
|
top = startIndex;
|
|
}
|
|
} else if (newIndex >= top) {
|
|
if (doingReverse) {
|
|
return; // if we are in reverse mode and reach the end bail out
|
|
} else {
|
|
// reset the newIndex to the end of the list we hit
|
|
// reverse the incrementer
|
|
// set the other end of the list to our original starting index
|
|
newIndex = top - 1;
|
|
aDoAdjustIncNext = -1;
|
|
doingReverse = PR_TRUE;
|
|
bottom = startIndex;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Looks like we found one
|
|
aNewIndex = newIndex;
|
|
}
|
|
|
|
nsAString&
|
|
nsListControlFrame::GetIncrementalString()
|
|
{
|
|
if (sIncrementalString == nsnull)
|
|
sIncrementalString = new nsString();
|
|
|
|
return *sIncrementalString;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::Shutdown()
|
|
{
|
|
delete sIncrementalString;
|
|
sIncrementalString = nsnull;
|
|
}
|
|
|
|
void
|
|
nsListControlFrame::DropDownToggleKey(nsIDOMEvent* aKeyEvent)
|
|
{
|
|
// Cocoa widgets do native popups, so don't try to show
|
|
// dropdowns there.
|
|
if (IsInDropDownMode() && !nsComboboxControlFrame::ToolkitHasNativePopup()) {
|
|
aKeyEvent->PreventDefault();
|
|
if (!mComboboxFrame->IsDroppedDown()) {
|
|
mComboboxFrame->ShowDropDown(PR_TRUE);
|
|
} else {
|
|
nsWeakFrame weakFrame(this);
|
|
// mEndSelectionIndex is the last item that got selected.
|
|
ComboboxFinish(mEndSelectionIndex);
|
|
if (weakFrame.IsAlive()) {
|
|
FireOnChange();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsListControlFrame::KeyPress(nsIDOMEvent* aKeyEvent)
|
|
{
|
|
NS_ASSERTION(aKeyEvent, "keyEvent is null.");
|
|
|
|
nsEventStates eventStates = mContent->AsElement()->State();
|
|
if (eventStates.HasState(NS_EVENT_STATE_DISABLED))
|
|
return NS_OK;
|
|
|
|
// Start by making sure we can query for a key event
|
|
nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aKeyEvent);
|
|
NS_ENSURE_TRUE(keyEvent, NS_ERROR_FAILURE);
|
|
|
|
PRUint32 keycode = 0;
|
|
PRUint32 charcode = 0;
|
|
keyEvent->GetKeyCode(&keycode);
|
|
keyEvent->GetCharCode(&charcode);
|
|
|
|
bool isAlt = false;
|
|
|
|
keyEvent->GetAltKey(&isAlt);
|
|
if (isAlt) {
|
|
if (keycode == nsIDOMKeyEvent::DOM_VK_UP || keycode == nsIDOMKeyEvent::DOM_VK_DOWN) {
|
|
DropDownToggleKey(aKeyEvent);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get control / shift modifiers
|
|
bool isControl = false;
|
|
bool isShift = false;
|
|
keyEvent->GetCtrlKey(&isControl);
|
|
if (!isControl) {
|
|
keyEvent->GetMetaKey(&isControl);
|
|
}
|
|
keyEvent->GetShiftKey(&isShift);
|
|
|
|
// now make sure there are options or we are wasting our time
|
|
nsCOMPtr<nsIDOMHTMLOptionsCollection> options = GetOptions(mContent);
|
|
NS_ENSURE_TRUE(options, NS_ERROR_FAILURE);
|
|
|
|
PRUint32 numOptions = 0;
|
|
options->GetLength(&numOptions);
|
|
|
|
// Whether we did an incremental search or another action
|
|
bool didIncrementalSearch = false;
|
|
|
|
// this is the new index to set
|
|
// DOM_VK_RETURN & DOM_VK_ESCAPE will not set this
|
|
PRInt32 newIndex = kNothingSelected;
|
|
|
|
// set up the old and new selected index and process it
|
|
// DOM_VK_RETURN selects the item
|
|
// DOM_VK_ESCAPE cancels the selection
|
|
// default processing checks to see if the pressed the first
|
|
// letter of an item in the list and advances to it
|
|
|
|
if (isControl && (keycode == nsIDOMKeyEvent::DOM_VK_UP ||
|
|
keycode == nsIDOMKeyEvent::DOM_VK_LEFT ||
|
|
keycode == nsIDOMKeyEvent::DOM_VK_DOWN ||
|
|
keycode == nsIDOMKeyEvent::DOM_VK_RIGHT)) {
|
|
// Don't go into multiple select mode unless this list can handle it
|
|
isControl = mControlSelectMode = GetMultiple();
|
|
} else if (charcode != ' ') {
|
|
mControlSelectMode = PR_FALSE;
|
|
}
|
|
switch (keycode) {
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_UP:
|
|
case nsIDOMKeyEvent::DOM_VK_LEFT: {
|
|
AdjustIndexForDisabledOpt(mEndSelectionIndex, newIndex,
|
|
(PRInt32)numOptions,
|
|
-1, -1);
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_DOWN:
|
|
case nsIDOMKeyEvent::DOM_VK_RIGHT: {
|
|
AdjustIndexForDisabledOpt(mEndSelectionIndex, newIndex,
|
|
(PRInt32)numOptions,
|
|
1, 1);
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_RETURN: {
|
|
if (mComboboxFrame != nsnull) {
|
|
if (mComboboxFrame->IsDroppedDown()) {
|
|
nsWeakFrame weakFrame(this);
|
|
ComboboxFinish(mEndSelectionIndex);
|
|
if (!weakFrame.IsAlive())
|
|
return NS_OK;
|
|
}
|
|
FireOnChange();
|
|
return NS_OK;
|
|
} else {
|
|
newIndex = mEndSelectionIndex;
|
|
}
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_ESCAPE: {
|
|
nsWeakFrame weakFrame(this);
|
|
AboutToRollup();
|
|
if (!weakFrame.IsAlive()) {
|
|
aKeyEvent->PreventDefault(); // since we won't reach the one below
|
|
return NS_OK;
|
|
}
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_PAGE_UP: {
|
|
AdjustIndexForDisabledOpt(mEndSelectionIndex, newIndex,
|
|
(PRInt32)numOptions,
|
|
-NS_MAX(1, mNumDisplayRows-1), -1);
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_PAGE_DOWN: {
|
|
AdjustIndexForDisabledOpt(mEndSelectionIndex, newIndex,
|
|
(PRInt32)numOptions,
|
|
NS_MAX(1, mNumDisplayRows-1), 1);
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_HOME: {
|
|
AdjustIndexForDisabledOpt(0, newIndex,
|
|
(PRInt32)numOptions,
|
|
0, 1);
|
|
} break;
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_END: {
|
|
AdjustIndexForDisabledOpt(numOptions-1, newIndex,
|
|
(PRInt32)numOptions,
|
|
0, -1);
|
|
} break;
|
|
|
|
#if defined(XP_WIN) || defined(XP_OS2)
|
|
case nsIDOMKeyEvent::DOM_VK_F4: {
|
|
DropDownToggleKey(aKeyEvent);
|
|
return NS_OK;
|
|
} break;
|
|
#endif
|
|
|
|
case nsIDOMKeyEvent::DOM_VK_TAB: {
|
|
return NS_OK;
|
|
}
|
|
|
|
default: { // Select option with this as the first character
|
|
// XXX Not I18N compliant
|
|
|
|
if (isControl && charcode != ' ') {
|
|
return NS_OK;
|
|
}
|
|
|
|
didIncrementalSearch = PR_TRUE;
|
|
if (charcode == 0) {
|
|
// Backspace key will delete the last char in the string
|
|
if (keycode == NS_VK_BACK && !GetIncrementalString().IsEmpty()) {
|
|
GetIncrementalString().Truncate(GetIncrementalString().Length() - 1);
|
|
aKeyEvent->PreventDefault();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
DOMTimeStamp keyTime;
|
|
aKeyEvent->GetTimeStamp(&keyTime);
|
|
|
|
// Incremental Search: if time elapsed is below
|
|
// INCREMENTAL_SEARCH_KEYPRESS_TIME, append this keystroke to the search
|
|
// string we will use to find options and start searching at the current
|
|
// keystroke. Otherwise, Truncate the string if it's been a long time
|
|
// since our last keypress.
|
|
if (keyTime - gLastKeyTime > INCREMENTAL_SEARCH_KEYPRESS_TIME) {
|
|
// If this is ' ' and we are at the beginning of the string, treat it as
|
|
// "select this option" (bug 191543)
|
|
if (charcode == ' ') {
|
|
newIndex = mEndSelectionIndex;
|
|
break;
|
|
}
|
|
GetIncrementalString().Truncate();
|
|
}
|
|
gLastKeyTime = keyTime;
|
|
|
|
// Append this keystroke to the search string.
|
|
PRUnichar uniChar = ToLowerCase(static_cast<PRUnichar>(charcode));
|
|
GetIncrementalString().Append(uniChar);
|
|
|
|
// See bug 188199, if all letters in incremental string are same, just try to match the first one
|
|
nsAutoString incrementalString(GetIncrementalString());
|
|
PRUint32 charIndex = 1, stringLength = incrementalString.Length();
|
|
while (charIndex < stringLength && incrementalString[charIndex] == incrementalString[charIndex - 1]) {
|
|
charIndex++;
|
|
}
|
|
if (charIndex == stringLength) {
|
|
incrementalString.Truncate(1);
|
|
stringLength = 1;
|
|
}
|
|
|
|
// Determine where we're going to start reading the string
|
|
// If we have multiple characters to look for, we start looking *at* the
|
|
// current option. If we have only one character to look for, we start
|
|
// looking *after* the current option.
|
|
// Exception: if there is no option selected to start at, we always start
|
|
// *at* 0.
|
|
PRInt32 startIndex = GetSelectedIndex();
|
|
if (startIndex == kNothingSelected) {
|
|
startIndex = 0;
|
|
} else if (stringLength == 1) {
|
|
startIndex++;
|
|
}
|
|
|
|
PRUint32 i;
|
|
for (i = 0; i < numOptions; i++) {
|
|
PRUint32 index = (i + startIndex) % numOptions;
|
|
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement =
|
|
GetOption(options, index);
|
|
if (optionElement) {
|
|
nsAutoString text;
|
|
if (NS_OK == optionElement->GetText(text)) {
|
|
if (StringBeginsWith(text, incrementalString,
|
|
nsCaseInsensitiveStringComparator())) {
|
|
bool wasChanged = PerformSelection(index, isShift, isControl);
|
|
if (wasChanged) {
|
|
// dispatch event, update combobox, etc.
|
|
if (!UpdateSelection()) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} // for
|
|
|
|
} break;//case
|
|
} // switch
|
|
|
|
// We ate the key if we got this far.
|
|
aKeyEvent->PreventDefault();
|
|
|
|
// If we didn't do an incremental search, clear the string
|
|
if (!didIncrementalSearch) {
|
|
GetIncrementalString().Truncate();
|
|
}
|
|
|
|
// Actually process the new index and let the selection code
|
|
// do the scrolling for us
|
|
if (newIndex != kNothingSelected) {
|
|
// If you hold control, but not shift, no key will actually do anything
|
|
// except space.
|
|
bool wasChanged = false;
|
|
if (isControl && !isShift && charcode != ' ') {
|
|
mStartSelectionIndex = newIndex;
|
|
mEndSelectionIndex = newIndex;
|
|
InvalidateFocus();
|
|
ScrollToIndex(newIndex);
|
|
|
|
#ifdef ACCESSIBILITY
|
|
FireMenuItemActiveEvent();
|
|
#endif
|
|
} else if (mControlSelectMode && charcode == ' ') {
|
|
wasChanged = SingleSelection(newIndex, PR_TRUE);
|
|
} else {
|
|
wasChanged = PerformSelection(newIndex, isShift, isControl);
|
|
}
|
|
if (wasChanged) {
|
|
// dispatch event, update combobox, etc.
|
|
if (!UpdateSelection()) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* nsListEventListener
|
|
*****************************************************************************/
|
|
|
|
NS_IMPL_ISUPPORTS1(nsListEventListener, nsIDOMEventListener)
|
|
|
|
NS_IMETHODIMP
|
|
nsListEventListener::HandleEvent(nsIDOMEvent* aEvent)
|
|
{
|
|
if (!mFrame)
|
|
return NS_OK;
|
|
|
|
nsAutoString eventType;
|
|
aEvent->GetType(eventType);
|
|
if (eventType.EqualsLiteral("keypress"))
|
|
return mFrame->nsListControlFrame::KeyPress(aEvent);
|
|
if (eventType.EqualsLiteral("mousedown"))
|
|
return mFrame->nsListControlFrame::MouseDown(aEvent);
|
|
if (eventType.EqualsLiteral("mouseup"))
|
|
return mFrame->nsListControlFrame::MouseUp(aEvent);
|
|
if (eventType.EqualsLiteral("mousemove"))
|
|
return mFrame->nsListControlFrame::MouseMove(aEvent);
|
|
|
|
NS_ABORT();
|
|
return NS_OK;
|
|
}
|