mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
5eb8920348
This is the third of three patches to rework the way we handle getting the font inflation container and width data during reflow, which are needed so that we can sometimes honor inflation during intrinsic width calculation (which we need to do to make some form controls inflate correctly).
479 lines
16 KiB
C++
479 lines
16 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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* 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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#ifndef nsListControlFrame_h___
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#define nsListControlFrame_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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#endif
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#include "nsGfxScrollFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsIListControlFrame.h"
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#include "nsISelectControlFrame.h"
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#include "nsIDOMEventListener.h"
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#include "nsIContent.h"
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#include "nsAutoPtr.h"
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#include "nsSelectsAreaFrame.h"
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class nsIDOMHTMLSelectElement;
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class nsIDOMHTMLOptionsCollection;
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class nsIDOMHTMLOptionElement;
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class nsIComboboxControlFrame;
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class nsPresContext;
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class nsListEventListener;
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/**
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* Frame-based listbox.
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*/
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class nsListControlFrame : public nsHTMLScrollFrame,
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public nsIFormControlFrame,
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public nsIListControlFrame,
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public nsISelectControlFrame
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{
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public:
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friend nsIFrame* NS_NewListControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame
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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 SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList);
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
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virtual nscoord GetMinWidth(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 Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD DidReflow(nsPresContext* aPresContext,
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const nsHTMLReflowState* aReflowState,
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nsDidReflowStatus aStatus);
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virtual void DestroyFrom(nsIFrame* aDestructRoot);
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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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virtual nsIFrame* GetContentInsertionFrame();
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::scrollFrame
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*/
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virtual nsIAtom* GetType() const;
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virtual bool IsFrameOfType(PRUint32 aFlags) const
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{
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return nsHTMLScrollFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
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}
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virtual void InvalidateInternal(const nsRect& aDamageRect,
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nscoord aX, nscoord aY, nsIFrame* aForChild,
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PRUint32 aFlags);
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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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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virtual void SetFocus(bool aOn = true, bool aRepaint = false);
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virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const;
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virtual bool ShouldPropagateComputedHeightToScrolledContent() const;
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// for accessibility purposes
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#ifdef ACCESSIBILITY
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virtual already_AddRefed<nsAccessible> CreateAccessible();
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#endif
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// nsContainerFrame
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virtual PRIntn GetSkipSides() const;
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// nsIListControlFrame
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virtual void SetComboboxFrame(nsIFrame* aComboboxFrame);
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virtual PRInt32 GetSelectedIndex();
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virtual already_AddRefed<nsIContent> GetCurrentOption();
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/**
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* Gets the text of the currently selected item.
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* If the there are zero items then an empty string is returned
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* If there is nothing selected, then the 0th item's text is returned.
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*/
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virtual void GetOptionText(PRInt32 aIndex, nsAString & aStr);
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virtual void CaptureMouseEvents(bool aGrabMouseEvents);
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virtual nscoord GetHeightOfARow();
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virtual PRInt32 GetNumberOfOptions();
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virtual void SyncViewWithFrame();
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virtual void AboutToDropDown();
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/**
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* @note This method might destroy |this|.
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*/
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virtual void AboutToRollup();
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/**
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* Dispatch a DOM onchange event synchroniously.
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* @note This method might destroy |this|.
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*/
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virtual void FireOnChange();
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/**
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* Makes aIndex the selected option of a combobox list.
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* @note This method might destroy |this|.
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*/
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virtual void ComboboxFinish(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(bool aIsDone);
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/**
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* Gets the content (an option) by index and then set it as
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* being selected or not selected.
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*/
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NS_IMETHOD OnOptionSelected(PRInt32 aIndex, bool aSelected);
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NS_IMETHOD OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex);
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// mouse event listeners (both )
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nsresult MouseDown(nsIDOMEvent* aMouseEvent); // might destroy |this|
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nsresult MouseUp(nsIDOMEvent* aMouseEvent); // might destroy |this|
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nsresult MouseMove(nsIDOMEvent* aMouseEvent);
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nsresult DragMove(nsIDOMEvent* aMouseEvent);
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nsresult KeyPress(nsIDOMEvent* aKeyEvent); // might destroy |this|
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/**
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* Returns the options collection for aContent, if any.
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*/
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static already_AddRefed<nsIDOMHTMLOptionsCollection>
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GetOptions(nsIContent * aContent);
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/**
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* Returns the nsIDOMHTMLOptionElement for a given index
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* in the select's collection.
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*/
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static already_AddRefed<nsIDOMHTMLOptionElement>
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GetOption(nsIDOMHTMLOptionsCollection* aOptions, PRInt32 aIndex);
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/**
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* Returns the nsIContent object in the collection
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* for a given index.
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*/
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static already_AddRefed<nsIContent>
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GetOptionAsContent(nsIDOMHTMLOptionsCollection* aCollection,PRInt32 aIndex);
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static void ComboboxFocusSet();
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// Helper
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bool IsFocused() { return this == mFocused; }
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/**
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* Function to paint the focus rect when our nsSelectsAreaFrame is painting.
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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 PaintFocus(nsRenderingContext& aRC, nsPoint aPt);
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/**
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* If this frame IsFocused(), invalidates an area that includes anything
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* that PaintFocus will or could have painted --- basically the whole
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* GetOptionsContainer, plus some extra stuff if there are no options. This
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* must be called every time mEndSelectionIndex changes.
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*
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* Pass non-null aReflowState if during reflow.
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*/
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void InvalidateFocus(const nsHTMLReflowState* aReflowState = nsnull);
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/**
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* Function to calculate the height a row, for use with the "size" attribute.
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* Can't be const because GetNumberOfOptions() isn't const.
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*/
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nscoord CalcHeightOfARow();
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/**
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* Function to ask whether we're currently in what might be the
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* first pass of a two-pass reflow.
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*/
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bool MightNeedSecondPass() const {
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return mMightNeedSecondPass;
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}
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void SetSuppressScrollbarUpdate(bool aSuppress) {
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nsHTMLScrollFrame::SetSuppressScrollbarUpdate(aSuppress);
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}
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/**
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* Return whether the list is in dropdown mode.
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*/
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bool IsInDropDownMode() const;
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/**
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* Dropdowns need views
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*/
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virtual bool NeedsView() { return IsInDropDownMode(); }
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/**
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* Frees statics owned by this class.
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*/
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static void Shutdown();
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#ifdef ACCESSIBILITY
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/**
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* Post a custom DOM event for the change, so that accessibility can
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* fire a native focus event for accessibility
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* (Some 3rd party products need to track our focus)
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*/
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void FireMenuItemActiveEvent(); // Inform assistive tech what got focused
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#endif
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protected:
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/**
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* Updates the selected text in a combobox and then calls FireOnChange().
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* Returns false if calling it destroyed |this|.
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*/
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bool UpdateSelection();
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/**
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* Returns whether mContent supports multiple selection.
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*/
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bool GetMultiple() const {
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return mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::multiple);
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}
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/**
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* Toggles (show/hide) the combobox dropdown menu.
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* @note This method might destroy |this|.
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*/
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void DropDownToggleKey(nsIDOMEvent* aKeyEvent);
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nsresult IsOptionDisabled(PRInt32 anIndex, bool &aIsDisabled);
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nsresult ScrollToFrame(nsIContent * aOptElement);
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nsresult ScrollToIndex(PRInt32 anIndex);
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/**
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* When the user clicks on the comboboxframe to show the dropdown
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* listbox, they then have to move the mouse into the list. We don't
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* want to process those mouse events as selection events (i.e., to
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* scroll list items into view). So we ignore the events until
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* the mouse moves below our border-inner-edge, when
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* mItemSelectionStarted is set.
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*
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* @param aPoint relative to this frame
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*/
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bool IgnoreMouseEventForSelection(nsIDOMEvent* aEvent);
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/**
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* If the dropdown is showing and the mouse has moved below our
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* border-inner-edge, then set mItemSelectionStarted.
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*/
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void UpdateInListState(nsIDOMEvent* aEvent);
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void AdjustIndexForDisabledOpt(PRInt32 aStartIndex, PRInt32 &anNewIndex,
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PRInt32 aNumOptions, PRInt32 aDoAdjustInc, PRInt32 aDoAdjustIncNext);
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/**
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* Resets the select back to it's original default values;
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* those values as determined by the original HTML
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*
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* Pass non-null aReflowState if during reflow.
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*/
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virtual void ResetList(bool aAllowScrolling,
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const nsHTMLReflowState* aReflowState = nsnull);
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nsListControlFrame(nsIPresShell* aShell, nsIDocument* aDocument, nsStyleContext* aContext);
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virtual ~nsListControlFrame();
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// Utility methods
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nsresult GetSizeAttribute(PRInt32 *aSize);
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nsIContent* GetOptionFromContent(nsIContent *aContent);
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/**
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* Sets the mSelectedIndex and mOldSelectedIndex from figuring out what
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* item was selected using content
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* @param aPoint the event point, in listcontrolframe coordinates
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* @return NS_OK if it successfully found the selection
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*/
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nsresult GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent, PRInt32& aCurIndex);
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/**
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* For a given index it returns the nsIContent object
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* from the select.
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*/
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already_AddRefed<nsIContent> GetOptionContent(PRInt32 aIndex) const;
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/**
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* For a given piece of content, it determines whether the
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* content (an option) is selected or not.
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* @return true if it is, false if it is NOT.
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*/
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bool IsContentSelected(nsIContent* aContent) const;
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/**
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* For a given index is return whether the content is selected.
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*/
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bool IsContentSelectedByIndex(PRInt32 aIndex) const;
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bool CheckIfAllFramesHere();
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PRInt32 GetIndexFromContent(nsIContent *aContent);
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bool IsLeftButton(nsIDOMEvent* aMouseEvent);
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// guess at a row height based on our own style.
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nscoord CalcFallbackRowHeight(float aFontSizeInflation);
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// CalcIntrinsicHeight computes our intrinsic height (taking the "size"
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// attribute into account). This should only be called in non-dropdown mode.
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nscoord CalcIntrinsicHeight(nscoord aHeightOfARow, PRInt32 aNumberOfOptions);
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// Dropped down stuff
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void SetComboboxItem(PRInt32 aIndex);
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/**
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* Method to reflow ourselves as a dropdown list. This differs from
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* reflow as a listbox because the criteria for needing a second
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* pass are different. This will be called from Reflow() as needed.
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*/
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nsresult ReflowAsDropdown(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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// Selection
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bool SetOptionsSelectedFromFrame(PRInt32 aStartIndex,
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PRInt32 aEndIndex,
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bool aValue,
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bool aClearAll);
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bool ToggleOptionSelectedFromFrame(PRInt32 aIndex);
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bool SingleSelection(PRInt32 aClickedIndex, bool aDoToggle);
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bool ExtendedSelection(PRInt32 aStartIndex, PRInt32 aEndIndex,
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bool aClearAll);
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bool PerformSelection(PRInt32 aClickedIndex, bool aIsShift,
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bool aIsControl);
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bool HandleListSelection(nsIDOMEvent * aDOMEvent, PRInt32 selectedIndex);
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void InitSelectionRange(PRInt32 aClickedIndex);
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nsSelectsAreaFrame* GetOptionsContainer() const {
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return static_cast<nsSelectsAreaFrame*>(GetScrolledFrame());
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}
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nscoord HeightOfARow() {
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return GetOptionsContainer()->HeightOfARow();
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}
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// Data Members
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PRInt32 mStartSelectionIndex;
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PRInt32 mEndSelectionIndex;
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nsIComboboxControlFrame *mComboboxFrame;
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PRInt32 mNumDisplayRows;
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bool mChangesSinceDragStart:1;
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bool mButtonDown:1;
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// Has the user selected a visible item since we showed the
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// dropdown?
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bool mItemSelectionStarted:1;
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bool mIsAllContentHere:1;
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bool mIsAllFramesHere:1;
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bool mHasBeenInitialized:1;
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bool mNeedToReset:1;
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bool mPostChildrenLoadedReset:1;
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//bool value for multiple discontiguous selection
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bool mControlSelectMode:1;
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// True if we're in the middle of a reflow and might need a second
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// pass. This only happens for auto heights.
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bool mMightNeedSecondPass:1;
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/**
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* Set to aPresContext->HasPendingInterrupt() at the start of Reflow.
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* Set to false at the end of DidReflow.
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*/
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bool mHasPendingInterruptAtStartOfReflow:1;
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// The last computed height we reflowed at if we're a combobox dropdown.
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// XXXbz should we be using a subclass here? Or just not worry
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// about the extra member on listboxes?
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nscoord mLastDropdownComputedHeight;
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// At the time of our last dropdown, the backstop color to draw in case we
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// are translucent.
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nscolor mLastDropdownBackstopColor;
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nsRefPtr<nsListEventListener> mEventListener;
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static nsListControlFrame * mFocused;
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static nsString * sIncrementalString;
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#ifdef DO_REFLOW_COUNTER
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PRInt32 mReflowId;
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#endif
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private:
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// for incremental typing navigation
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static nsAString& GetIncrementalString ();
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static DOMTimeStamp gLastKeyTime;
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};
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#endif /* nsListControlFrame_h___ */
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