зеркало из https://github.com/mozilla/gecko-dev.git
432 строки
14 KiB
C++
432 строки
14 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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*
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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 "nsHTMLButtonControlFrame.h"
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#include "nsCOMPtr.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsHTMLParts.h"
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#include "nsIFormControl.h"
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#include "nsIRenderingContext.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsStyleContext.h"
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#include "nsLeafFrame.h"
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#include "nsCSSRendering.h"
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#include "nsISupports.h"
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#include "nsGkAtoms.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsStyleConsts.h"
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#include "nsIComponentManager.h"
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#include "nsIDocument.h"
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#include "nsButtonFrameRenderer.h"
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#include "nsFormControlFrame.h"
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#include "nsFrameManager.h"
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#include "nsINameSpaceManager.h"
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#include "nsIServiceManager.h"
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#include "nsIDOMHTMLButtonElement.h"
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#include "nsIDOMHTMLInputElement.h"
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#include "nsStyleSet.h"
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#ifdef ACCESSIBILITY
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#include "nsIAccessibilityService.h"
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#endif
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#include "nsDisplayList.h"
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nsIFrame*
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NS_NewHTMLButtonControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsHTMLButtonControlFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsHTMLButtonControlFrame)
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nsHTMLButtonControlFrame::nsHTMLButtonControlFrame(nsStyleContext* aContext)
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: nsHTMLContainerFrame(aContext)
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{
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}
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nsHTMLButtonControlFrame::~nsHTMLButtonControlFrame()
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{
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}
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void
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nsHTMLButtonControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), PR_FALSE);
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nsHTMLContainerFrame::DestroyFrom(aDestructRoot);
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::Init(
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsHTMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
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if (NS_SUCCEEDED(rv)) {
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mRenderer.SetFrame(this, PresContext());
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}
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return rv;
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}
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NS_QUERYFRAME_HEAD(nsHTMLButtonControlFrame)
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NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsHTMLContainerFrame)
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#ifdef ACCESSIBILITY
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already_AddRefed<nsAccessible>
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nsHTMLButtonControlFrame::CreateAccessible()
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{
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nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
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if (accService) {
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return IsInput() ?
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accService->CreateHTMLButtonAccessible(mContent, PresContext()->PresShell()) :
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accService->CreateHTML4ButtonAccessible(mContent, 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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nsIAtom*
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nsHTMLButtonControlFrame::GetType() const
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{
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return nsGkAtoms::HTMLButtonControlFrame;
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}
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void
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nsHTMLButtonControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
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{
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::HandleEvent(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus)
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{
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// if disabled do nothing
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if (mRenderer.isDisabled()) {
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return NS_OK;
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}
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// mouse clicks are handled by content
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// we don't want our children to get any events. So just pass it to frame.
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return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::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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nsDisplayList onTop;
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if (IsVisibleForPainting(aBuilder)) {
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nsresult rv = mRenderer.DisplayButton(aBuilder, aLists.BorderBackground(), &onTop);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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nsDisplayListCollection set;
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// Do not allow the child subtree to receive events.
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if (!aBuilder->IsForEventDelivery()) {
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nsresult rv =
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BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), aDirtyRect, set,
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DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT);
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NS_ENSURE_SUCCESS(rv, rv);
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// That should put the display items in set.Content()
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}
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// Put the foreground outline and focus rects on top of the children
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set.Content()->AppendToTop(&onTop);
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// clips to our padding box for <input>s but not <button>s, unless
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// they have non-visible overflow..
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if (IsInput() || GetStyleDisplay()->mOverflowX != NS_STYLE_OVERFLOW_VISIBLE) {
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nsMargin border = GetStyleBorder()->GetActualBorder();
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nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
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rect.Deflate(border);
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nscoord radii[8];
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GetPaddingBoxBorderRadii(radii);
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nsresult rv = OverflowClip(aBuilder, set, aLists, rect, radii);
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NS_ENSURE_SUCCESS(rv, rv);
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} else {
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set.MoveTo(aLists);
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}
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nsresult rv = DisplayOutline(aBuilder, aLists);
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NS_ENSURE_SUCCESS(rv, rv);
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// to draw border when selected in editor
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return DisplaySelectionOverlay(aBuilder, aLists.Content());
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}
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nscoord
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nsHTMLButtonControlFrame::GetMinWidth(nsIRenderingContext* aRenderingContext)
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{
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nscoord result;
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DISPLAY_MIN_WIDTH(this, result);
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nsIFrame* kid = mFrames.FirstChild();
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result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
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kid,
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nsLayoutUtils::MIN_WIDTH);
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result += mRenderer.GetAddedButtonBorderAndPadding().LeftRight();
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return result;
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}
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nscoord
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nsHTMLButtonControlFrame::GetPrefWidth(nsIRenderingContext* aRenderingContext)
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{
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nscoord result;
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DISPLAY_PREF_WIDTH(this, result);
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nsIFrame* kid = mFrames.FirstChild();
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result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
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kid,
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nsLayoutUtils::PREF_WIDTH);
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result += mRenderer.GetAddedButtonBorderAndPadding().LeftRight();
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return result;
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::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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DO_GLOBAL_REFLOW_COUNT("nsHTMLButtonControlFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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NS_PRECONDITION(aReflowState.ComputedWidth() != NS_INTRINSICSIZE,
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"Should have real computed width by now");
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if (mState & NS_FRAME_FIRST_REFLOW) {
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nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), PR_TRUE);
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}
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// Reflow the child
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nsIFrame* firstKid = mFrames.FirstChild();
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// XXXbz Eventually we may want to check-and-bail if
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// !aReflowState.ShouldReflowAllKids() &&
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// !NS_SUBTREE_DIRTY(firstKid).
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// We'd need to cache our ascent for that, of course.
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nsMargin focusPadding = mRenderer.GetAddedButtonBorderAndPadding();
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// Reflow the contents of the button.
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ReflowButtonContents(aPresContext, aDesiredSize, aReflowState, firstKid,
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focusPadding, aStatus);
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aDesiredSize.width = aReflowState.ComputedWidth();
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// If computed use the computed value.
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if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE)
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aDesiredSize.height = aReflowState.ComputedHeight();
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else
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aDesiredSize.height += focusPadding.TopBottom();
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aDesiredSize.width += aReflowState.mComputedBorderPadding.LeftRight();
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aDesiredSize.height += aReflowState.mComputedBorderPadding.TopBottom();
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// Make sure we obey min/max-height. Note that we do this after adjusting
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// for borderpadding, since buttons have border-box sizing...
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// XXXbz unless someone overrides that, of course! We should really consider
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// exposing nsHTMLReflowState::AdjustComputed* or something.
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aDesiredSize.height = NS_CSS_MINMAX(aDesiredSize.height,
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aReflowState.mComputedMinHeight,
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aReflowState.mComputedMaxHeight);
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aDesiredSize.ascent +=
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aReflowState.mComputedBorderPadding.top + focusPadding.top;
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aDesiredSize.SetOverflowAreasToDesiredBounds();
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ConsiderChildOverflow(aDesiredSize.mOverflowAreas, firstKid);
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FinishAndStoreOverflow(&aDesiredSize);
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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return NS_OK;
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}
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void
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nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsIFrame* aFirstKid,
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nsMargin aFocusPadding,
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nsReflowStatus& aStatus)
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{
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nsSize availSize(aReflowState.ComputedWidth(), NS_INTRINSICSIZE);
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// Indent the child inside us by the focus border. We must do this separate
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// from the regular border.
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availSize.width -= aFocusPadding.LeftRight();
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// See whether out availSize's width is big enough. If it's smaller than our
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// intrinsic min width, that means that the kid wouldn't really fit; for a
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// better look in such cases we adjust the available width and our left
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// offset to allow the kid to spill left into our padding.
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nscoord xoffset = aFocusPadding.left + aReflowState.mComputedBorderPadding.left;
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nscoord extrawidth = GetMinWidth(aReflowState.rendContext) -
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aReflowState.ComputedWidth();
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if (extrawidth > 0) {
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nscoord extraleft = extrawidth / 2;
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nscoord extraright = extrawidth - extraleft;
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NS_ASSERTION(extraright >=0, "How'd that happen?");
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// Do not allow the extras to be bigger than the relevant padding
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extraleft = NS_MIN(extraleft, aReflowState.mComputedPadding.left);
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extraright = NS_MIN(extraright, aReflowState.mComputedPadding.right);
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xoffset -= extraleft;
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availSize.width += extraleft + extraright;
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}
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availSize.width = NS_MAX(availSize.width,0);
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nsHTMLReflowState reflowState(aPresContext, aReflowState, aFirstKid,
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availSize);
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ReflowChild(aFirstKid, aPresContext, aDesiredSize, reflowState,
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xoffset,
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aFocusPadding.top + aReflowState.mComputedBorderPadding.top,
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0, aStatus);
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// calculate the min internal height so the contents gets centered correctly.
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// XXXbz this assumes border-box sizing.
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nscoord minInternalHeight = aReflowState.mComputedMinHeight -
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aReflowState.mComputedBorderPadding.TopBottom();
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minInternalHeight = NS_MAX(minInternalHeight, 0);
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// center child vertically
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nscoord yoff = 0;
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if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
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yoff = (aReflowState.ComputedHeight() - aDesiredSize.height)/2;
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if (yoff < 0) {
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yoff = 0;
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}
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} else if (aDesiredSize.height < minInternalHeight) {
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yoff = (minInternalHeight - aDesiredSize.height) / 2;
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}
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// Place the child
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FinishReflowChild(aFirstKid, aPresContext, &reflowState, aDesiredSize,
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xoffset,
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yoff + aFocusPadding.top + aReflowState.mComputedBorderPadding.top, 0);
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if (aDesiredSize.ascent == nsHTMLReflowMetrics::ASK_FOR_BASELINE)
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aDesiredSize.ascent = aFirstKid->GetBaseline();
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// Adjust the baseline by our offset (since we moved the child's
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// baseline by that much).
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aDesiredSize.ascent += yoff;
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}
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/* virtual */ PRBool
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nsHTMLButtonControlFrame::IsContainingBlock() const
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{
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return PR_TRUE;
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}
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PRIntn
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nsHTMLButtonControlFrame::GetSkipSides() const
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{
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return 0;
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}
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nsresult nsHTMLButtonControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
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{
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if (nsGkAtoms::value == aName) {
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return mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::value,
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aValue, PR_TRUE);
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}
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return NS_OK;
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}
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nsresult nsHTMLButtonControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
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{
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if (nsGkAtoms::value == aName)
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mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue);
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return NS_OK;
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}
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nsStyleContext*
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nsHTMLButtonControlFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
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{
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return mRenderer.GetStyleContext(aIndex);
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}
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void
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nsHTMLButtonControlFrame::SetAdditionalStyleContext(PRInt32 aIndex,
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nsStyleContext* aStyleContext)
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{
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mRenderer.SetStyleContext(aIndex, aStyleContext);
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::AppendFrames(nsIAtom* aListName,
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nsFrameList& aFrameList)
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{
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NS_NOTREACHED("unsupported operation");
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return NS_ERROR_UNEXPECTED;
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::InsertFrames(nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList)
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{
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NS_NOTREACHED("unsupported operation");
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return NS_ERROR_UNEXPECTED;
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}
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NS_IMETHODIMP
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nsHTMLButtonControlFrame::RemoveFrame(nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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NS_NOTREACHED("unsupported operation");
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return NS_ERROR_UNEXPECTED;
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}
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