зеркало из https://github.com/mozilla/gecko-dev.git
298 строки
11 KiB
C++
298 строки
11 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.org 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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* Dean Tessman <dean_tessman@hotmail.com>
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* Mats Palmgren <mats.palmgren@bredband.net>
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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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#ifndef nsComboboxControlFrame_h___
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#define nsComboboxControlFrame_h___
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#ifdef DEBUG_evaughan
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//#define DEBUG_rods
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#endif
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#ifdef DEBUG_rods
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//#define DO_REFLOW_DEBUG
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//#define DO_REFLOW_COUNTER
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//#define DO_UNCONSTRAINED_CHECK
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//#define DO_PIXELS
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//#define DO_NEW_REFLOW
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#endif
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//Mark used to indicate when onchange has been fired for current combobox item
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#define NS_SKIP_NOTIFY_INDEX -2
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#include "nsBlockFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsIComboboxControlFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsISelectControlFrame.h"
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#include "nsIRollupListener.h"
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#include "nsPresState.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsIStatefulFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsIDOMEventListener.h"
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#include "nsThreadUtils.h"
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class nsIView;
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class nsStyleContext;
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class nsIListControlFrame;
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class nsComboboxDisplayFrame;
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/**
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* Child list name indices
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* @see #GetAdditionalChildListName()
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*/
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#define NS_COMBO_LIST_COUNT (NS_BLOCK_LIST_COUNT + 1)
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class nsComboboxControlFrame : public nsBlockFrame,
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public nsIFormControlFrame,
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public nsIComboboxControlFrame,
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public nsIAnonymousContentCreator,
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public nsISelectControlFrame,
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public nsIRollupListener,
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public nsIStatefulFrame
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{
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public:
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friend nsIFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aFlags);
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friend class nsComboboxDisplayFrame;
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nsComboboxControlFrame(nsStyleContext* aContext);
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~nsComboboxControlFrame();
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIAnonymousContentCreator
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virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements);
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virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
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PRUint32 aFilter);
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virtual nsIFrame* CreateFrameFor(nsIContent* aContent);
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#ifdef ACCESSIBILITY
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virtual already_AddRefed<nsAccessible> CreateAccessible();
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#endif
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virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
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NS_IMETHOD Reflow(nsPresContext* aCX,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus);
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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void PaintFocus(nsRenderingContext& aRenderingContext, nsPoint aPt);
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// XXXbz this is only needed to prevent the quirk percent height stuff from
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// leaking out of the combobox. We may be able to get rid of this as more
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// things move to IsFrameOfType.
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virtual nsIAtom* GetType() const;
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virtual PRBool IsFrameOfType(PRUint32 aFlags) const
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{
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return nsBlockFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
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}
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virtual nsIScrollableFrame* GetScrollTargetFrame() {
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return do_QueryFrame(mDropdownFrame);
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}
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#ifdef NS_DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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virtual void DestroyFrom(nsIFrame* aDestructRoot);
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virtual nsFrameList GetChildList(nsIAtom* aListName) const;
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NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
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nsFrameList& aChildList);
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virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
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virtual nsIFrame* GetContentInsertionFrame();
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// nsIFormControlFrame
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virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
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virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
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/**
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* Inform the control that it got (or lost) focus.
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* If it lost focus, the dropdown menu will be rolled up if needed,
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* and FireOnChange() will be called.
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* @param aOn PR_TRUE if got focus, PR_FALSE if lost focus.
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* @param aRepaint if PR_TRUE then force repaint (NOTE: we always force repaint currently)
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* @note This method might destroy |this|.
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*/
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virtual void SetFocus(PRBool aOn, PRBool aRepaint);
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//nsIComboboxControlFrame
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virtual PRBool IsDroppedDown() { return mDroppedDown; }
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/**
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* @note This method might destroy |this|.
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*/
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virtual void ShowDropDown(PRBool aDoDropDown);
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virtual nsIFrame* GetDropDown();
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virtual void SetDropDown(nsIFrame* aDropDownFrame);
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/**
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* @note This method might destroy |this|.
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*/
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virtual void RollupFromList();
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virtual void AbsolutelyPositionDropDown();
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virtual PRInt32 GetIndexOfDisplayArea();
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/**
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* @note This method might destroy |this|.
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*/
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NS_IMETHOD RedisplaySelectedText();
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virtual PRInt32 UpdateRecentIndex(PRInt32 aIndex);
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virtual void OnContentReset();
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// nsISelectControlFrame
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NS_IMETHOD AddOption(PRInt32 index);
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NS_IMETHOD RemoveOption(PRInt32 index);
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NS_IMETHOD DoneAddingChildren(PRBool aIsDone);
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NS_IMETHOD OnOptionSelected(PRInt32 aIndex, PRBool aSelected);
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NS_IMETHOD OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex);
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//nsIRollupListener
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/**
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* Hide the dropdown menu and stop capturing mouse events.
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* @note This method might destroy |this|.
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*/
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NS_IMETHOD Rollup(PRUint32 aCount, nsIContent** aLastRolledUp);
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/**
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* A combobox should roll up if a mousewheel event happens outside of
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* the popup area.
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*/
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NS_IMETHOD ShouldRollupOnMouseWheelEvent(PRBool *aShouldRollup)
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{ *aShouldRollup = PR_TRUE; return NS_OK;}
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/**
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* A combobox should not roll up if activated by a mouse activate message
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* (eg. X-mouse).
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*/
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NS_IMETHOD ShouldRollupOnMouseActivate(PRBool *aShouldRollup)
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{ *aShouldRollup = PR_FALSE; return NS_OK;}
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//nsIStatefulFrame
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NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState);
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NS_IMETHOD RestoreState(nsPresState* aState);
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static PRBool ToolkitHasNativePopup();
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protected:
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// Utilities
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nsresult ReflowDropdown(nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState);
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// Helper for GetMinWidth/GetPrefWidth
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nscoord GetIntrinsicWidth(nsRenderingContext* aRenderingContext,
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nsLayoutUtils::IntrinsicWidthType aType);
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protected:
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class RedisplayTextEvent;
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friend class RedisplayTextEvent;
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class RedisplayTextEvent : public nsRunnable {
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public:
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NS_DECL_NSIRUNNABLE
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RedisplayTextEvent(nsComboboxControlFrame *c) : mControlFrame(c) {}
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void Revoke() { mControlFrame = nsnull; }
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private:
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nsComboboxControlFrame *mControlFrame;
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};
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/**
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* Show or hide the dropdown list.
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* @note This method might destroy |this|.
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*/
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void ShowPopup(PRBool aShowPopup);
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/**
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* Show or hide the dropdown list.
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* @param aShowList PR_TRUE to show, PR_FALSE to hide the dropdown.
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* @note This method might destroy |this|.
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* @return PR_FALSE if this frame is destroyed, PR_TRUE if still alive.
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*/
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PRBool ShowList(PRBool aShowList);
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void CheckFireOnChange();
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void FireValueChangeEvent();
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nsresult RedisplayText(PRInt32 aIndex);
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void HandleRedisplayTextEvent();
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void ActuallyDisplayText(PRBool aNotify);
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nsFrameList mPopupFrames; // additional named child list
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nsCOMPtr<nsIContent> mDisplayContent; // Anonymous content used to display the current selection
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nsCOMPtr<nsIContent> mButtonContent; // Anonymous content for the button
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nsIFrame* mDisplayFrame; // frame to display selection
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nsIFrame* mButtonFrame; // button frame
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nsIFrame* mDropdownFrame; // dropdown list frame
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nsIListControlFrame * mListControlFrame; // ListControl Interface for the dropdown frame
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// The width of our display area. Used by that frame's reflow to
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// size to the full width except the drop-marker.
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nscoord mDisplayWidth;
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PRPackedBool mDroppedDown; // Current state of the dropdown list, PR_TRUE is dropped down
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PRPackedBool mInRedisplayText;
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nsRevocableEventPtr<RedisplayTextEvent> mRedisplayTextEvent;
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PRInt32 mRecentSelectedIndex;
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PRInt32 mDisplayedIndex;
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nsString mDisplayedOptionText;
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// make someone to listen to the button. If its programmatically pressed by someone like Accessibility
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// then open or close the combo box.
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nsCOMPtr<nsIDOMEventListener> mButtonListener;
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// static class data member for Bug 32920
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// only one control can be focused at a time
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static nsComboboxControlFrame * mFocused;
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#ifdef DO_REFLOW_COUNTER
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PRInt32 mReflowId;
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#endif
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};
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#endif
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