LCOV - code coverage report
Current view: directory - layout/forms - nsHTMLButtonControlFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 145 0 0.0 %
Date: 2012-06-02 Functions: 26 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsHTMLButtonControlFrame.h"
      39                 : 
      40                 : #include "nsCOMPtr.h"
      41                 : #include "nsContainerFrame.h"
      42                 : #include "nsIFormControlFrame.h"
      43                 : #include "nsHTMLParts.h"
      44                 : #include "nsIFormControl.h"
      45                 : 
      46                 : #include "nsPresContext.h"
      47                 : #include "nsIPresShell.h"
      48                 : #include "nsStyleContext.h"
      49                 : #include "nsLeafFrame.h"
      50                 : #include "nsCSSRendering.h"
      51                 : #include "nsISupports.h"
      52                 : #include "nsGkAtoms.h"
      53                 : #include "nsCSSAnonBoxes.h"
      54                 : #include "nsStyleConsts.h"
      55                 : #include "nsIComponentManager.h"
      56                 : #include "nsIDocument.h"
      57                 : #include "nsButtonFrameRenderer.h"
      58                 : #include "nsFormControlFrame.h"
      59                 : #include "nsFrameManager.h"
      60                 : #include "nsINameSpaceManager.h"
      61                 : #include "nsIServiceManager.h"
      62                 : #include "nsIDOMHTMLButtonElement.h"
      63                 : #include "nsIDOMHTMLInputElement.h"
      64                 : #include "nsStyleSet.h"
      65                 : #ifdef ACCESSIBILITY
      66                 : #include "nsAccessibilityService.h"
      67                 : #endif
      68                 : #include "nsDisplayList.h"
      69                 : 
      70                 : nsIFrame*
      71               0 : NS_NewHTMLButtonControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
      72                 : {
      73               0 :   return new (aPresShell) nsHTMLButtonControlFrame(aContext);
      74                 : }
      75                 : 
      76               0 : NS_IMPL_FRAMEARENA_HELPERS(nsHTMLButtonControlFrame)
      77                 : 
      78               0 : nsHTMLButtonControlFrame::nsHTMLButtonControlFrame(nsStyleContext* aContext)
      79               0 :   : nsContainerFrame(aContext)
      80                 : {
      81               0 : }
      82                 : 
      83               0 : nsHTMLButtonControlFrame::~nsHTMLButtonControlFrame()
      84                 : {
      85               0 : }
      86                 : 
      87                 : void
      88               0 : nsHTMLButtonControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
      89                 : {
      90               0 :   nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
      91               0 :   DestroyAbsoluteFrames(aDestructRoot);
      92               0 :   nsContainerFrame::DestroyFrom(aDestructRoot);
      93               0 : }
      94                 : 
      95                 : NS_IMETHODIMP
      96               0 : nsHTMLButtonControlFrame::Init(
      97                 :               nsIContent*      aContent,
      98                 :               nsIFrame*        aParent,
      99                 :               nsIFrame*        aPrevInFlow)
     100                 : {
     101               0 :   nsresult  rv = nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
     102               0 :   if (NS_SUCCEEDED(rv)) {
     103               0 :     mRenderer.SetFrame(this, PresContext());
     104                 :   }
     105               0 :   return rv;
     106                 : }
     107                 : 
     108               0 : NS_QUERYFRAME_HEAD(nsHTMLButtonControlFrame)
     109               0 :   NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
     110               0 : NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
     111                 : 
     112                 : #ifdef ACCESSIBILITY
     113                 : already_AddRefed<nsAccessible>
     114               0 : nsHTMLButtonControlFrame::CreateAccessible()
     115                 : {
     116               0 :   nsAccessibilityService* accService = nsIPresShell::AccService();
     117               0 :   if (accService) {
     118                 :     return accService->CreateHTMLButtonAccessible(mContent,
     119               0 :                                                   PresContext()->PresShell()); 
     120                 :   }
     121                 : 
     122               0 :   return nsnull;
     123                 : }
     124                 : #endif
     125                 : 
     126                 : nsIAtom*
     127               0 : nsHTMLButtonControlFrame::GetType() const
     128                 : {
     129               0 :   return nsGkAtoms::HTMLButtonControlFrame;
     130                 : }
     131                 : 
     132                 : void 
     133               0 : nsHTMLButtonControlFrame::SetFocus(bool aOn, bool aRepaint)
     134                 : {
     135               0 : }
     136                 : 
     137                 : NS_IMETHODIMP
     138               0 : nsHTMLButtonControlFrame::HandleEvent(nsPresContext* aPresContext, 
     139                 :                                       nsGUIEvent*     aEvent,
     140                 :                                       nsEventStatus*  aEventStatus)
     141                 : {
     142                 :   // if disabled do nothing
     143               0 :   if (mRenderer.isDisabled()) {
     144               0 :     return NS_OK;
     145                 :   }
     146                 : 
     147                 :   // mouse clicks are handled by content
     148                 :   // we don't want our children to get any events. So just pass it to frame.
     149               0 :   return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
     150                 : }
     151                 : 
     152                 : 
     153                 : NS_IMETHODIMP
     154               0 : nsHTMLButtonControlFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     155                 :                                            const nsRect&           aDirtyRect,
     156                 :                                            const nsDisplayListSet& aLists)
     157                 : {
     158               0 :   nsDisplayList onTop;
     159               0 :   if (IsVisibleForPainting(aBuilder)) {
     160               0 :     nsresult rv = mRenderer.DisplayButton(aBuilder, aLists.BorderBackground(), &onTop);
     161               0 :     NS_ENSURE_SUCCESS(rv, rv);
     162                 :   }
     163                 :   
     164               0 :   nsDisplayListCollection set;
     165                 :   // Do not allow the child subtree to receive events.
     166               0 :   if (!aBuilder->IsForEventDelivery()) {
     167                 :     nsresult rv =
     168                 :       BuildDisplayListForChild(aBuilder, mFrames.FirstChild(), aDirtyRect, set,
     169               0 :                                DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT);
     170               0 :     NS_ENSURE_SUCCESS(rv, rv);
     171                 :     // That should put the display items in set.Content()
     172                 :   }
     173                 :   
     174                 :   // Put the foreground outline and focus rects on top of the children
     175               0 :   set.Content()->AppendToTop(&onTop);
     176                 : 
     177                 :   // clips to our padding box for <input>s but not <button>s, unless
     178                 :   // they have non-visible overflow..
     179               0 :   if (IsInput() || GetStyleDisplay()->mOverflowX != NS_STYLE_OVERFLOW_VISIBLE) {
     180               0 :     nsMargin border = GetStyleBorder()->GetActualBorder();
     181               0 :     nsRect rect(aBuilder->ToReferenceFrame(this), GetSize());
     182               0 :     rect.Deflate(border);
     183                 :     nscoord radii[8];
     184               0 :     GetPaddingBoxBorderRadii(radii);
     185                 : 
     186               0 :     nsresult rv = OverflowClip(aBuilder, set, aLists, rect, radii);
     187               0 :     NS_ENSURE_SUCCESS(rv, rv);
     188                 :   } else {
     189               0 :     set.MoveTo(aLists);
     190                 :   }
     191                 :   
     192               0 :   nsresult rv = DisplayOutline(aBuilder, aLists);
     193               0 :   NS_ENSURE_SUCCESS(rv, rv);
     194                 : 
     195                 :   // to draw border when selected in editor
     196               0 :   return DisplaySelectionOverlay(aBuilder, aLists.Content());
     197                 : }
     198                 : 
     199                 : nscoord
     200               0 : nsHTMLButtonControlFrame::GetMinWidth(nsRenderingContext* aRenderingContext)
     201                 : {
     202                 :   nscoord result;
     203               0 :   DISPLAY_MIN_WIDTH(this, result);
     204                 : 
     205               0 :   nsIFrame* kid = mFrames.FirstChild();
     206                 :   result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
     207                 :                                                 kid,
     208               0 :                                                 nsLayoutUtils::MIN_WIDTH);
     209                 : 
     210               0 :   result += mRenderer.GetAddedButtonBorderAndPadding().LeftRight();
     211                 : 
     212               0 :   return result;
     213                 : }
     214                 : 
     215                 : nscoord
     216               0 : nsHTMLButtonControlFrame::GetPrefWidth(nsRenderingContext* aRenderingContext)
     217                 : {
     218                 :   nscoord result;
     219               0 :   DISPLAY_PREF_WIDTH(this, result);
     220                 :   
     221               0 :   nsIFrame* kid = mFrames.FirstChild();
     222                 :   result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
     223                 :                                                 kid,
     224               0 :                                                 nsLayoutUtils::PREF_WIDTH);
     225               0 :   result += mRenderer.GetAddedButtonBorderAndPadding().LeftRight();
     226               0 :   return result;
     227                 : }
     228                 : 
     229                 : NS_IMETHODIMP 
     230               0 : nsHTMLButtonControlFrame::Reflow(nsPresContext* aPresContext,
     231                 :                                nsHTMLReflowMetrics& aDesiredSize,
     232                 :                                const nsHTMLReflowState& aReflowState,
     233                 :                                nsReflowStatus& aStatus)
     234                 : {
     235               0 :   DO_GLOBAL_REFLOW_COUNT("nsHTMLButtonControlFrame");
     236               0 :   DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
     237                 : 
     238               0 :   NS_PRECONDITION(aReflowState.ComputedWidth() != NS_INTRINSICSIZE,
     239                 :                   "Should have real computed width by now");
     240                 : 
     241               0 :   if (mState & NS_FRAME_FIRST_REFLOW) {
     242               0 :     nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);
     243                 :   }
     244                 : 
     245                 :   // Reflow the child
     246               0 :   nsIFrame* firstKid = mFrames.FirstChild();
     247                 : 
     248                 :   // XXXbz Eventually we may want to check-and-bail if
     249                 :   // !aReflowState.ShouldReflowAllKids() &&
     250                 :   // !NS_SUBTREE_DIRTY(firstKid).
     251                 :   // We'd need to cache our ascent for that, of course.
     252                 :   
     253               0 :   nsMargin focusPadding = mRenderer.GetAddedButtonBorderAndPadding();
     254                 :   
     255                 :   // Reflow the contents of the button.
     256                 :   ReflowButtonContents(aPresContext, aDesiredSize, aReflowState, firstKid,
     257               0 :                        focusPadding, aStatus);
     258                 : 
     259               0 :   aDesiredSize.width = aReflowState.ComputedWidth();
     260                 : 
     261                 :   // If computed use the computed value.
     262               0 :   if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) 
     263               0 :     aDesiredSize.height = aReflowState.ComputedHeight();
     264                 :   else
     265               0 :     aDesiredSize.height += focusPadding.TopBottom();
     266                 :   
     267               0 :   aDesiredSize.width += aReflowState.mComputedBorderPadding.LeftRight();
     268               0 :   aDesiredSize.height += aReflowState.mComputedBorderPadding.TopBottom();
     269                 : 
     270                 :   // Make sure we obey min/max-height.  Note that we do this after adjusting
     271                 :   // for borderpadding, since buttons have border-box sizing...
     272                 : 
     273                 :   // XXXbz unless someone overrides that, of course!  We should really consider
     274                 :   // exposing nsHTMLReflowState::AdjustComputed* or something.
     275                 :   aDesiredSize.height = NS_CSS_MINMAX(aDesiredSize.height,
     276                 :                                       aReflowState.mComputedMinHeight,
     277               0 :                                       aReflowState.mComputedMaxHeight);
     278                 : 
     279                 :   aDesiredSize.ascent +=
     280               0 :     aReflowState.mComputedBorderPadding.top + focusPadding.top;
     281                 : 
     282               0 :   aDesiredSize.SetOverflowAreasToDesiredBounds();
     283               0 :   ConsiderChildOverflow(aDesiredSize.mOverflowAreas, firstKid);
     284               0 :   FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus);
     285                 : 
     286               0 :   aStatus = NS_FRAME_COMPLETE;
     287                 : 
     288               0 :   NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
     289               0 :   return NS_OK;
     290                 : }
     291                 : 
     292                 : void
     293               0 : nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
     294                 :                                                nsHTMLReflowMetrics& aDesiredSize,
     295                 :                                                const nsHTMLReflowState& aReflowState,
     296                 :                                                nsIFrame* aFirstKid,
     297                 :                                                nsMargin aFocusPadding,
     298                 :                                                nsReflowStatus& aStatus)
     299                 : {
     300               0 :   nsSize availSize(aReflowState.ComputedWidth(), NS_INTRINSICSIZE);
     301                 : 
     302                 :   // Indent the child inside us by the focus border. We must do this separate
     303                 :   // from the regular border.
     304               0 :   availSize.width -= aFocusPadding.LeftRight();
     305                 :   
     306                 :   // See whether out availSize's width is big enough.  If it's smaller than our
     307                 :   // intrinsic min width, that means that the kid wouldn't really fit; for a
     308                 :   // better look in such cases we adjust the available width and our left
     309                 :   // offset to allow the kid to spill left into our padding.
     310               0 :   nscoord xoffset = aFocusPadding.left + aReflowState.mComputedBorderPadding.left;
     311               0 :   nscoord extrawidth = GetMinWidth(aReflowState.rendContext) -
     312               0 :     aReflowState.ComputedWidth();
     313               0 :   if (extrawidth > 0) {
     314               0 :     nscoord extraleft = extrawidth / 2;
     315               0 :     nscoord extraright = extrawidth - extraleft;
     316               0 :     NS_ASSERTION(extraright >=0, "How'd that happen?");
     317                 :     
     318                 :     // Do not allow the extras to be bigger than the relevant padding
     319               0 :     extraleft = NS_MIN(extraleft, aReflowState.mComputedPadding.left);
     320               0 :     extraright = NS_MIN(extraright, aReflowState.mComputedPadding.right);
     321               0 :     xoffset -= extraleft;
     322               0 :     availSize.width += extraleft + extraright;
     323                 :   }
     324               0 :   availSize.width = NS_MAX(availSize.width,0);
     325                 :   
     326                 :   nsHTMLReflowState reflowState(aPresContext, aReflowState, aFirstKid,
     327               0 :                                 availSize);
     328                 : 
     329                 :   ReflowChild(aFirstKid, aPresContext, aDesiredSize, reflowState,
     330                 :               xoffset,
     331                 :               aFocusPadding.top + aReflowState.mComputedBorderPadding.top,
     332               0 :               0, aStatus);
     333                 :   
     334                 :   // calculate the min internal height so the contents gets centered correctly.
     335                 :   // XXXbz this assumes border-box sizing.
     336                 :   nscoord minInternalHeight = aReflowState.mComputedMinHeight -
     337               0 :     aReflowState.mComputedBorderPadding.TopBottom();
     338               0 :   minInternalHeight = NS_MAX(minInternalHeight, 0);
     339                 : 
     340                 :   // center child vertically
     341               0 :   nscoord yoff = 0;
     342               0 :   if (aReflowState.ComputedHeight() != NS_INTRINSICSIZE) {
     343               0 :     yoff = (aReflowState.ComputedHeight() - aDesiredSize.height)/2;
     344               0 :     if (yoff < 0) {
     345               0 :       yoff = 0;
     346                 :     }
     347               0 :   } else if (aDesiredSize.height < minInternalHeight) {
     348               0 :     yoff = (minInternalHeight - aDesiredSize.height) / 2;
     349                 :   }
     350                 : 
     351                 :   // Place the child
     352                 :   FinishReflowChild(aFirstKid, aPresContext, &reflowState, aDesiredSize,
     353                 :                     xoffset,
     354               0 :                     yoff + aFocusPadding.top + aReflowState.mComputedBorderPadding.top, 0);
     355                 : 
     356               0 :   if (aDesiredSize.ascent == nsHTMLReflowMetrics::ASK_FOR_BASELINE)
     357               0 :     aDesiredSize.ascent = aFirstKid->GetBaseline();
     358                 : 
     359                 :   // Adjust the baseline by our offset (since we moved the child's
     360                 :   // baseline by that much).
     361               0 :   aDesiredSize.ascent += yoff;
     362               0 : }
     363                 : 
     364                 : PRIntn
     365               0 : nsHTMLButtonControlFrame::GetSkipSides() const
     366                 : {
     367               0 :   return 0;
     368                 : }
     369                 : 
     370               0 : nsresult nsHTMLButtonControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
     371                 : {
     372               0 :   if (nsGkAtoms::value == aName) {
     373                 :     return mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::value,
     374               0 :                              aValue, true);
     375                 :   }
     376               0 :   return NS_OK;
     377                 : }
     378                 : 
     379               0 : nsresult nsHTMLButtonControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
     380                 : {
     381               0 :   if (nsGkAtoms::value == aName)
     382               0 :     mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue);
     383                 : 
     384               0 :   return NS_OK;
     385                 : }
     386                 : 
     387                 : nsStyleContext*
     388               0 : nsHTMLButtonControlFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
     389                 : {
     390               0 :   return mRenderer.GetStyleContext(aIndex);
     391                 : }
     392                 : 
     393                 : void
     394               0 : nsHTMLButtonControlFrame::SetAdditionalStyleContext(PRInt32 aIndex, 
     395                 :                                                     nsStyleContext* aStyleContext)
     396                 : {
     397               0 :   mRenderer.SetStyleContext(aIndex, aStyleContext);
     398               0 : }
     399                 : 
     400                 : NS_IMETHODIMP 
     401               0 : nsHTMLButtonControlFrame::AppendFrames(ChildListID     aListID,
     402                 :                                        nsFrameList&    aFrameList)
     403                 : {
     404               0 :   NS_NOTREACHED("unsupported operation");
     405               0 :   return NS_ERROR_UNEXPECTED;
     406                 : }
     407                 : 
     408                 : NS_IMETHODIMP
     409               0 : nsHTMLButtonControlFrame::InsertFrames(ChildListID     aListID,
     410                 :                                        nsIFrame*       aPrevFrame,
     411                 :                                        nsFrameList&    aFrameList)
     412                 : {
     413               0 :   NS_NOTREACHED("unsupported operation");
     414               0 :   return NS_ERROR_UNEXPECTED;
     415                 : }
     416                 : 
     417                 : NS_IMETHODIMP
     418               0 : nsHTMLButtonControlFrame::RemoveFrame(ChildListID     aListID,
     419                 :                                       nsIFrame*       aOldFrame)
     420                 : {
     421               0 :   NS_NOTREACHED("unsupported operation");
     422               0 :   return NS_ERROR_UNEXPECTED;
     423                 : }

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