LCOV - code coverage report
Current view: directory - layout/generic - nsPageContentFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 47 0 0.0 %
Date: 2012-06-02 Functions: 7 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                 : #include "nsPageContentFrame.h"
      38                 : #include "nsPageFrame.h"
      39                 : #include "nsPlaceholderFrame.h"
      40                 : #include "nsCSSFrameConstructor.h"
      41                 : #include "nsContainerFrame.h"
      42                 : #include "nsHTMLParts.h"
      43                 : #include "nsIContent.h"
      44                 : #include "nsPresContext.h"
      45                 : #include "nsGkAtoms.h"
      46                 : #include "nsIPresShell.h"
      47                 : #include "nsReadableUtils.h"
      48                 : #include "nsSimplePageSequence.h"
      49                 : #include "nsDisplayList.h"
      50                 : 
      51                 : nsIFrame*
      52               0 : NS_NewPageContentFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
      53                 : {
      54               0 :   return new (aPresShell) nsPageContentFrame(aContext);
      55                 : }
      56                 : 
      57               0 : NS_IMPL_FRAMEARENA_HELPERS(nsPageContentFrame)
      58                 : 
      59                 : /* virtual */ nsSize
      60               0 : nsPageContentFrame::ComputeSize(nsRenderingContext *aRenderingContext,
      61                 :                                 nsSize aCBSize, nscoord aAvailableWidth,
      62                 :                                 nsSize aMargin, nsSize aBorder, nsSize aPadding,
      63                 :                                 bool aShrinkWrap)
      64                 : {
      65               0 :   NS_ASSERTION(mPD, "Pages are supposed to have page data");
      66               0 :   nscoord height = (!mPD || mPD->mReflowSize.height == NS_UNCONSTRAINEDSIZE)
      67                 :                    ? NS_UNCONSTRAINEDSIZE
      68               0 :                    : (mPD->mReflowSize.height - mPD->mReflowMargin.TopBottom());
      69               0 :   return nsSize(aAvailableWidth, height);
      70                 : }
      71                 : 
      72                 : NS_IMETHODIMP
      73               0 : nsPageContentFrame::Reflow(nsPresContext*           aPresContext,
      74                 :                            nsHTMLReflowMetrics&     aDesiredSize,
      75                 :                            const nsHTMLReflowState& aReflowState,
      76                 :                            nsReflowStatus&          aStatus)
      77                 : {
      78               0 :   DO_GLOBAL_REFLOW_COUNT("nsPageContentFrame");
      79               0 :   DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
      80               0 :   aStatus = NS_FRAME_COMPLETE;  // initialize out parameter
      81               0 :   nsresult rv = NS_OK;
      82                 : 
      83               0 :   if (GetPrevInFlow() && (GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
      84                 :     nsresult rv = aPresContext->PresShell()->FrameConstructor()
      85               0 :                     ->ReplicateFixedFrames(this);
      86               0 :     NS_ENSURE_SUCCESS(rv, rv);
      87                 :   }
      88                 : 
      89                 :   // Set our size up front, since some parts of reflow depend on it
      90                 :   // being already set.  Note that the computed height may be
      91                 :   // unconstrained; that's ok.  Consumers should watch out for that.
      92               0 :   SetSize(nsSize(aReflowState.availableWidth, aReflowState.availableHeight));
      93                 :  
      94                 :   // A PageContentFrame must always have one child: the canvas frame.
      95                 :   // Resize our frame allowing it only to be as big as we are
      96                 :   // XXX Pay attention to the page's border and padding...
      97               0 :   if (mFrames.NotEmpty()) {
      98               0 :     nsIFrame* frame = mFrames.FirstChild();
      99               0 :     nsSize  maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
     100               0 :     nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
     101               0 :     kidReflowState.SetComputedHeight(aReflowState.availableHeight);
     102                 : 
     103               0 :     mPD->mPageContentSize  = aReflowState.availableWidth;
     104                 : 
     105                 :     // Reflow the page content area
     106               0 :     rv = ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
     107               0 :     NS_ENSURE_SUCCESS(rv, rv);
     108                 : 
     109                 :     // The document element's background should cover the entire canvas, so
     110                 :     // take into account the combined area and any space taken up by
     111                 :     // absolutely positioned elements
     112               0 :     nsMargin padding(0,0,0,0);
     113                 : 
     114                 :     // XXXbz this screws up percentage padding (sets padding to zero
     115                 :     // in the percentage padding case)
     116               0 :     kidReflowState.mStylePadding->GetPadding(padding);
     117                 : 
     118                 :     // This is for shrink-to-fit, and therefore we want to use the
     119                 :     // scrollable overflow, since the purpose of shrink to fit is to
     120                 :     // make the content that ought to be reachable (represented by the
     121                 :     // scrollable overflow) fit in the page.
     122               0 :     if (frame->HasOverflowAreas()) {
     123                 :       // The background covers the content area and padding area, so check
     124                 :       // for children sticking outside the child frame's padding edge
     125               0 :       nscoord xmost = aDesiredSize.ScrollableOverflow().XMost();
     126               0 :       if (xmost > aDesiredSize.width) {
     127                 :         mPD->mPageContentXMost =
     128                 :           xmost +
     129               0 :           kidReflowState.mStyleBorder->GetActualBorderWidth(NS_SIDE_RIGHT) +
     130               0 :           padding.right;
     131                 :       }
     132                 :     }
     133                 : 
     134                 :     // Place and size the child
     135               0 :     FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, 0, 0, 0);
     136                 : 
     137               0 :     NS_ASSERTION(aPresContext->IsDynamic() || !NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
     138                 :                   !frame->GetNextInFlow(), "bad child flow list");
     139                 :   }
     140                 : 
     141                 :   // Reflow our fixed frames
     142               0 :   nsReflowStatus fixedStatus = NS_FRAME_COMPLETE;
     143               0 :   ReflowAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, fixedStatus);
     144               0 :   NS_ASSERTION(NS_FRAME_IS_COMPLETE(fixedStatus), "fixed frames can be truncated, but not incomplete");
     145                 : 
     146                 :   // Return our desired size
     147               0 :   aDesiredSize.width = aReflowState.availableWidth;
     148               0 :   if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
     149               0 :     aDesiredSize.height = aReflowState.availableHeight;
     150                 :   }
     151                 : 
     152               0 :   FinishAndStoreOverflow(&aDesiredSize);
     153                 : 
     154               0 :   NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
     155               0 :   return NS_OK;
     156                 : }
     157                 : 
     158                 : nsIAtom*
     159               0 : nsPageContentFrame::GetType() const
     160                 : {
     161               0 :   return nsGkAtoms::pageContentFrame; 
     162                 : }
     163                 : 
     164                 : #ifdef DEBUG
     165                 : NS_IMETHODIMP
     166               0 : nsPageContentFrame::GetFrameName(nsAString& aResult) const
     167                 : {
     168               0 :   return MakeFrameName(NS_LITERAL_STRING("PageContent"), aResult);
     169                 : }
     170                 : #endif

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