LCOV - code coverage report
Current view: directory - layout/forms - nsSelectsAreaFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 87 0 0.0 %
Date: 2012-06-02 Functions: 25 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                 :  *   Pierre Phaneuf <pp@ludusdesign.com>
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : #include "nsSelectsAreaFrame.h"
      39                 : #include "nsCOMPtr.h"
      40                 : #include "nsIDOMHTMLOptionElement.h"
      41                 : #include "nsIContent.h"
      42                 : #include "nsListControlFrame.h"
      43                 : #include "nsDisplayList.h"
      44                 : 
      45                 : nsIFrame*
      46               0 : NS_NewSelectsAreaFrame(nsIPresShell* aShell, nsStyleContext* aContext, PRUint32 aFlags)
      47                 : {
      48               0 :   nsSelectsAreaFrame* it = new (aShell) nsSelectsAreaFrame(aContext);
      49                 : 
      50               0 :   if (it) {
      51                 :     // We need NS_BLOCK_FLOAT_MGR to ensure that the options inside the select
      52                 :     // aren't expanded by right floats outside the select.
      53               0 :     it->SetFlags(aFlags | NS_BLOCK_FLOAT_MGR);
      54                 :   }
      55                 : 
      56               0 :   return it;
      57                 : }
      58                 : 
      59               0 : NS_IMPL_FRAMEARENA_HELPERS(nsSelectsAreaFrame)
      60                 : 
      61                 : //---------------------------------------------------------
      62                 : /**
      63                 :  * This wrapper class lets us redirect mouse hits from the child frame of
      64                 :  * an option element to the element's own frame.
      65                 :  * REVIEW: This is what nsSelectsAreaFrame::GetFrameForPoint used to do
      66                 :  */
      67               0 : class nsDisplayOptionEventGrabber : public nsDisplayWrapList {
      68                 : public:
      69               0 :   nsDisplayOptionEventGrabber(nsDisplayListBuilder* aBuilder,
      70                 :                               nsIFrame* aFrame, nsDisplayItem* aItem)
      71               0 :     : nsDisplayWrapList(aBuilder, aFrame, aItem) {}
      72               0 :   nsDisplayOptionEventGrabber(nsDisplayListBuilder* aBuilder,
      73                 :                               nsIFrame* aFrame, nsDisplayList* aList)
      74               0 :     : nsDisplayWrapList(aBuilder, aFrame, aList) {}
      75                 :   virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
      76                 :                        HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames);
      77               0 :   NS_DISPLAY_DECL_NAME("OptionEventGrabber", TYPE_OPTION_EVENT_GRABBER)
      78                 : 
      79                 :   virtual nsDisplayWrapList* WrapWithClone(nsDisplayListBuilder* aBuilder,
      80                 :                                            nsDisplayItem* aItem);
      81                 : };
      82                 : 
      83               0 : void nsDisplayOptionEventGrabber::HitTest(nsDisplayListBuilder* aBuilder,
      84                 :     const nsRect& aRect, HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
      85                 : {
      86               0 :   nsTArray<nsIFrame*> outFrames;
      87               0 :   mList.HitTest(aBuilder, aRect, aState, &outFrames);
      88                 : 
      89               0 :   for (PRUint32 i = 0; i < outFrames.Length(); i++) {
      90               0 :     nsIFrame* selectedFrame = outFrames.ElementAt(i);
      91               0 :     while (selectedFrame &&
      92               0 :            !(selectedFrame->GetContent() &&
      93               0 :              selectedFrame->GetContent()->IsHTML(nsGkAtoms::option))) {
      94               0 :       selectedFrame = selectedFrame->GetParent();
      95                 :     }
      96               0 :     if (selectedFrame) {
      97               0 :       aOutFrames->AppendElement(selectedFrame);
      98                 :     } else {
      99                 :       // keep the original result, which could be this frame
     100               0 :       aOutFrames->AppendElement(outFrames.ElementAt(i));
     101                 :     }
     102                 :   }
     103                 : 
     104               0 : }
     105                 : 
     106               0 : nsDisplayWrapList* nsDisplayOptionEventGrabber::WrapWithClone(
     107                 :     nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) {
     108                 :   return new (aBuilder)
     109               0 :     nsDisplayOptionEventGrabber(aBuilder, aItem->GetUnderlyingFrame(), aItem);
     110                 : }
     111                 : 
     112                 : class nsOptionEventGrabberWrapper : public nsDisplayWrapper
     113                 : {
     114                 : public:
     115               0 :   nsOptionEventGrabberWrapper() {}
     116               0 :   virtual nsDisplayItem* WrapList(nsDisplayListBuilder* aBuilder,
     117                 :                                   nsIFrame* aFrame, nsDisplayList* aList) {
     118                 :     // We can't specify the underlying frame here. We need this list to be
     119                 :     // exploded if sorted.
     120               0 :     return new (aBuilder) nsDisplayOptionEventGrabber(aBuilder, nsnull, aList);
     121                 :   }
     122               0 :   virtual nsDisplayItem* WrapItem(nsDisplayListBuilder* aBuilder,
     123                 :                                   nsDisplayItem* aItem) {
     124               0 :     return new (aBuilder) nsDisplayOptionEventGrabber(aBuilder, aItem->GetUnderlyingFrame(), aItem);
     125                 :   }
     126                 : };
     127                 : 
     128               0 : static nsListControlFrame* GetEnclosingListFrame(nsIFrame* aSelectsAreaFrame)
     129                 : {
     130               0 :   nsIFrame* frame = aSelectsAreaFrame->GetParent();
     131               0 :   while (frame) {
     132               0 :     if (frame->GetType() == nsGkAtoms::listControlFrame)
     133               0 :       return static_cast<nsListControlFrame*>(frame);
     134               0 :     frame = frame->GetParent();
     135                 :   }
     136               0 :   return nsnull;
     137                 : }
     138                 : 
     139                 : class nsDisplayListFocus : public nsDisplayItem {
     140                 : public:
     141               0 :   nsDisplayListFocus(nsDisplayListBuilder* aBuilder,
     142                 :                      nsSelectsAreaFrame* aFrame) :
     143               0 :     nsDisplayItem(aBuilder, aFrame) {
     144               0 :     MOZ_COUNT_CTOR(nsDisplayListFocus);
     145               0 :   }
     146                 : #ifdef NS_BUILD_REFCNT_LOGGING
     147               0 :   virtual ~nsDisplayListFocus() {
     148               0 :     MOZ_COUNT_DTOR(nsDisplayListFocus);
     149               0 :   }
     150                 : #endif
     151                 : 
     152               0 :   virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder) {
     153                 :     // override bounds because the list item focus ring may extend outside
     154                 :     // the nsSelectsAreaFrame
     155               0 :     nsListControlFrame* listFrame = GetEnclosingListFrame(GetUnderlyingFrame());
     156               0 :     return listFrame->GetVisualOverflowRectRelativeToSelf() +
     157               0 :            aBuilder->ToReferenceFrame(listFrame);
     158                 :   }
     159               0 :   virtual void Paint(nsDisplayListBuilder* aBuilder,
     160                 :                      nsRenderingContext* aCtx) {
     161               0 :     nsListControlFrame* listFrame = GetEnclosingListFrame(GetUnderlyingFrame());
     162                 :     // listFrame must be non-null or we wouldn't get called.
     163               0 :     listFrame->PaintFocus(*aCtx, aBuilder->ToReferenceFrame(listFrame));
     164               0 :   }
     165               0 :   NS_DISPLAY_DECL_NAME("ListFocus", TYPE_LIST_FOCUS)
     166                 : };
     167                 : 
     168                 : NS_IMETHODIMP
     169               0 : nsSelectsAreaFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     170                 :                                      const nsRect&           aDirtyRect,
     171                 :                                      const nsDisplayListSet& aLists)
     172                 : {
     173               0 :   if (!aBuilder->IsForEventDelivery())
     174               0 :     return BuildDisplayListInternal(aBuilder, aDirtyRect, aLists);
     175                 :     
     176               0 :   nsDisplayListCollection set;
     177               0 :   nsresult rv = BuildDisplayListInternal(aBuilder, aDirtyRect, set);
     178               0 :   NS_ENSURE_SUCCESS(rv, rv);
     179                 :   
     180               0 :   nsOptionEventGrabberWrapper wrapper;
     181               0 :   return wrapper.WrapLists(aBuilder, this, set, aLists);
     182                 : }
     183                 : 
     184                 : nsresult
     185               0 : nsSelectsAreaFrame::BuildDisplayListInternal(nsDisplayListBuilder*   aBuilder,
     186                 :                                              const nsRect&           aDirtyRect,
     187                 :                                              const nsDisplayListSet& aLists)
     188                 : {
     189               0 :   nsresult rv = nsBlockFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
     190               0 :   NS_ENSURE_SUCCESS(rv, rv);
     191                 : 
     192               0 :   nsListControlFrame* listFrame = GetEnclosingListFrame(this);
     193               0 :   if (listFrame && listFrame->IsFocused()) {
     194                 :     // we can't just associate the display item with the list frame,
     195                 :     // because then the list's scrollframe won't clip it (the scrollframe
     196                 :     // only clips contained descendants).
     197                 :     return aLists.Outlines()->AppendNewToTop(new (aBuilder)
     198               0 :       nsDisplayListFocus(aBuilder, this));
     199                 :   }
     200                 :   
     201               0 :   return NS_OK;
     202                 : }
     203                 : 
     204                 : NS_IMETHODIMP 
     205               0 : nsSelectsAreaFrame::Reflow(nsPresContext*           aPresContext, 
     206                 :                            nsHTMLReflowMetrics&     aDesiredSize,
     207                 :                            const nsHTMLReflowState& aReflowState, 
     208                 :                            nsReflowStatus&          aStatus)
     209                 : {
     210               0 :   nsListControlFrame* list = GetEnclosingListFrame(this);
     211               0 :   NS_ASSERTION(list,
     212                 :                "Must have an nsListControlFrame!  Frame constructor is "
     213                 :                "broken");
     214                 :   
     215               0 :   bool isInDropdownMode = list->IsInDropDownMode();
     216                 :   
     217                 :   // See similar logic in nsListControlFrame::Reflow and
     218                 :   // nsListControlFrame::ReflowAsDropdown.  We need to match it here.
     219                 :   nscoord oldHeight;
     220               0 :   if (isInDropdownMode) {
     221                 :     // Store the height now in case it changes during
     222                 :     // nsBlockFrame::Reflow for some odd reason.
     223               0 :     if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
     224               0 :       oldHeight = GetSize().height;
     225                 :     } else {
     226               0 :       oldHeight = NS_UNCONSTRAINEDSIZE;
     227                 :     }
     228                 :   }
     229                 :   
     230                 :   nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize,
     231               0 :                                     aReflowState, aStatus);
     232               0 :   NS_ENSURE_SUCCESS(rv, rv);
     233                 : 
     234                 :   // Check whether we need to suppress scrolbar updates.  We want to do that if
     235                 :   // we're in a possible first pass and our height of a row has changed.
     236               0 :   if (list->MightNeedSecondPass()) {
     237               0 :     nscoord newHeightOfARow = list->CalcHeightOfARow();
     238                 :     // We'll need a second pass if our height of a row changed.  For
     239                 :     // comboboxes, we'll also need it if our height changed.  If we're going
     240                 :     // to do a second pass, suppress scrollbar updates for this pass.
     241               0 :     if (newHeightOfARow != mHeightOfARow ||
     242                 :         (isInDropdownMode && (oldHeight != aDesiredSize.height ||
     243               0 :                               oldHeight != GetSize().height))) {
     244               0 :       mHeightOfARow = newHeightOfARow;
     245               0 :       list->SetSuppressScrollbarUpdate(true);
     246                 :     }
     247                 :   }
     248                 : 
     249               0 :   return rv;
     250                 : }

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