LCOV - code coverage report
Current view: directory - layout/svg/base/src - nsSVGInnerSVGFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 88 0 0.0 %
Date: 2012-06-02 Functions: 14 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 the Mozilla SVG project.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Crocodile Clips Ltd..
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2001
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
      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                 : 
      39                 : #include "nsSVGInnerSVGFrame.h"
      40                 : #include "nsIFrame.h"
      41                 : #include "nsISVGChildFrame.h"
      42                 : #include "nsIDOMSVGAnimatedRect.h"
      43                 : #include "nsSVGSVGElement.h"
      44                 : #include "nsSVGContainerFrame.h"
      45                 : #include "gfxContext.h"
      46                 : 
      47                 : nsIFrame*
      48               0 : NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
      49                 : {
      50               0 :   return new (aPresShell) nsSVGInnerSVGFrame(aContext);
      51                 : }
      52                 : 
      53               0 : NS_IMPL_FRAMEARENA_HELPERS(nsSVGInnerSVGFrame)
      54                 : 
      55                 : //----------------------------------------------------------------------
      56                 : // nsIFrame methods
      57                 : 
      58               0 : NS_QUERYFRAME_HEAD(nsSVGInnerSVGFrame)
      59               0 :   NS_QUERYFRAME_ENTRY(nsSVGInnerSVGFrame)
      60               0 :   NS_QUERYFRAME_ENTRY(nsISVGSVGFrame)
      61               0 : NS_QUERYFRAME_TAIL_INHERITING(nsSVGInnerSVGFrameBase)
      62                 : 
      63                 : #ifdef DEBUG
      64                 : NS_IMETHODIMP
      65               0 : nsSVGInnerSVGFrame::Init(nsIContent* aContent,
      66                 :                          nsIFrame* aParent,
      67                 :                          nsIFrame* aPrevInFlow)
      68                 : {
      69               0 :   nsCOMPtr<nsIDOMSVGSVGElement> svg = do_QueryInterface(aContent);
      70               0 :   NS_ASSERTION(svg, "Content is not an SVG 'svg' element!");
      71                 : 
      72               0 :   return nsSVGInnerSVGFrameBase::Init(aContent, aParent, aPrevInFlow);
      73                 : }
      74                 : #endif /* DEBUG */
      75                 : 
      76                 : nsIAtom *
      77               0 : nsSVGInnerSVGFrame::GetType() const
      78                 : {
      79               0 :   return nsGkAtoms::svgInnerSVGFrame;
      80                 : }
      81                 : 
      82                 : //----------------------------------------------------------------------
      83                 : // nsISVGChildFrame methods
      84                 : 
      85                 : NS_IMETHODIMP
      86               0 : nsSVGInnerSVGFrame::PaintSVG(nsRenderingContext *aContext,
      87                 :                              const nsIntRect *aDirtyRect)
      88                 : {
      89               0 :   gfxContextAutoSaveRestore autoSR;
      90                 : 
      91               0 :   if (GetStyleDisplay()->IsScrollableOverflow()) {
      92                 :     float x, y, width, height;
      93                 :     static_cast<nsSVGSVGElement*>(mContent)->
      94               0 :       GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
      95                 : 
      96               0 :     if (width <= 0 || height <= 0) {
      97               0 :       return NS_OK;
      98                 :     }
      99                 : 
     100               0 :     nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
     101               0 :     gfxMatrix clipTransform = parent->GetCanvasTM();
     102                 : 
     103               0 :     gfxContext *gfx = aContext->ThebesContext();
     104               0 :     autoSR.SetContext(gfx);
     105                 :     gfxRect clipRect =
     106               0 :       nsSVGUtils::GetClipRectForFrame(this, x, y, width, height);
     107               0 :     nsSVGUtils::SetClipRect(gfx, clipTransform, clipRect);
     108                 :   }
     109                 : 
     110               0 :   return nsSVGInnerSVGFrameBase::PaintSVG(aContext, aDirtyRect);
     111                 : }
     112                 : 
     113                 : void
     114               0 : nsSVGInnerSVGFrame::NotifySVGChanged(PRUint32 aFlags)
     115                 : {
     116               0 :   NS_ABORT_IF_FALSE(!(aFlags & DO_NOT_NOTIFY_RENDERING_OBSERVERS) ||
     117                 :                     (GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD),
     118                 :                     "Must be NS_STATE_SVG_NONDISPLAY_CHILD!");
     119                 : 
     120               0 :   NS_ABORT_IF_FALSE(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
     121                 :                     "Invalidation logic may need adjusting");
     122                 : 
     123               0 :   if (aFlags & COORD_CONTEXT_CHANGED) {
     124                 : 
     125               0 :     nsSVGSVGElement *svg = static_cast<nsSVGSVGElement*>(mContent);
     126                 : 
     127                 :     // Coordinate context changes affect mCanvasTM if we have a
     128                 :     // percentage 'x' or 'y', or if we have a percentage 'width' or 'height' AND
     129                 :     // a 'viewBox'.
     130                 : 
     131               0 :     if (!(aFlags & TRANSFORM_CHANGED) &&
     132               0 :         (svg->mLengthAttributes[nsSVGSVGElement::X].IsPercentage() ||
     133               0 :          svg->mLengthAttributes[nsSVGSVGElement::Y].IsPercentage() ||
     134               0 :          (svg->mViewBox.IsValid() &&
     135               0 :           (svg->mLengthAttributes[nsSVGSVGElement::WIDTH].IsPercentage() ||
     136               0 :            svg->mLengthAttributes[nsSVGSVGElement::HEIGHT].IsPercentage())))) {
     137                 :     
     138               0 :       aFlags |= TRANSFORM_CHANGED;
     139                 :     }
     140                 : 
     141                 :     // XXX We could clear the COORD_CONTEXT_CHANGED flag in some circumstances
     142                 :     // if we have a non-percentage 'width' AND 'height, or if we have a 'viewBox'
     143                 :     // rect. This is because, when we have a viewBox rect, the viewBox rect
     144                 :     // is the coordinate context for our children, and it isn't changing.
     145                 :     // Percentage lengths on our children will continue to resolve to the
     146                 :     // same number of user units because they're relative to our viewBox rect. The
     147                 :     // same is true if we have a non-percentage width and height and don't have a
     148                 :     // viewBox. We (the <svg>) establish the coordinate context for our children. Our
     149                 :     // children don't care about changes to our parent coordinate context unless that
     150                 :     // change results in a change to the coordinate context that _we_ establish. Hence
     151                 :     // we can (should, really) stop propagating COORD_CONTEXT_CHANGED in these cases.
     152                 :     // We'd actually need to check that we have a viewBox rect and not just
     153                 :     // that viewBox is set, since it could be set to none.
     154                 :     // Take care not to break the testcase for bug 394463 when implementing this
     155                 :   }
     156                 : 
     157               0 :   if (aFlags & TRANSFORM_CHANGED) {
     158                 :     // make sure our cached transform matrix gets (lazily) updated
     159               0 :     mCanvasTM = nsnull;
     160                 :   }
     161                 : 
     162               0 :   nsSVGInnerSVGFrameBase::NotifySVGChanged(aFlags);
     163               0 : }
     164                 : 
     165                 : NS_IMETHODIMP
     166               0 : nsSVGInnerSVGFrame::AttributeChanged(PRInt32  aNameSpaceID,
     167                 :                                      nsIAtom* aAttribute,
     168                 :                                      PRInt32  aModType)
     169                 : {
     170               0 :   if (aNameSpaceID == kNameSpaceID_None) {
     171               0 :     if (aAttribute == nsGkAtoms::width ||
     172                 :         aAttribute == nsGkAtoms::height) {
     173                 : 
     174               0 :       nsSVGSVGElement* svg = static_cast<nsSVGSVGElement*>(mContent);
     175               0 :       if (svg->mViewBox.IsValid()) {
     176                 : 
     177                 :         // make sure our cached transform matrix gets (lazily) updated
     178               0 :         mCanvasTM = nsnull;
     179                 : 
     180               0 :         nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
     181                 :       } else {
     182                 : 
     183               0 :         PRUint32 flags = COORD_CONTEXT_CHANGED;
     184                 : 
     185               0 :         if (mCanvasTM && mCanvasTM->IsSingular()) {
     186                 : 
     187               0 :           mCanvasTM = nsnull;
     188                 : 
     189               0 :           flags |= TRANSFORM_CHANGED;
     190                 :         }
     191               0 :         nsSVGUtils::NotifyChildrenOfSVGChange(this, flags);
     192               0 :       }
     193                 : 
     194               0 :     } else if (aAttribute == nsGkAtoms::transform ||
     195                 :                aAttribute == nsGkAtoms::preserveAspectRatio ||
     196                 :                aAttribute == nsGkAtoms::viewBox ||
     197                 :                aAttribute == nsGkAtoms::x ||
     198                 :                aAttribute == nsGkAtoms::y) {
     199                 :       // make sure our cached transform matrix gets (lazily) updated
     200               0 :       mCanvasTM = nsnull;
     201                 : 
     202                 :       nsSVGUtils::NotifyChildrenOfSVGChange(
     203                 :           this, aAttribute == nsGkAtoms::viewBox ?
     204               0 :                   TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED);
     205                 :     }
     206                 :   }
     207                 : 
     208               0 :   return NS_OK;
     209                 : }
     210                 : 
     211                 : NS_IMETHODIMP_(nsIFrame*)
     212               0 : nsSVGInnerSVGFrame::GetFrameForPoint(const nsPoint &aPoint)
     213                 : {
     214               0 :   if (GetStyleDisplay()->IsScrollableOverflow()) {
     215               0 :     nsSVGElement *content = static_cast<nsSVGElement*>(mContent);
     216               0 :     nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
     217                 : 
     218                 :     float clipX, clipY, clipWidth, clipHeight;
     219               0 :     content->GetAnimatedLengthValues(&clipX, &clipY, &clipWidth, &clipHeight, nsnull);
     220                 : 
     221               0 :     if (!nsSVGUtils::HitTestRect(parent->GetCanvasTM(),
     222                 :                                  clipX, clipY, clipWidth, clipHeight,
     223               0 :                                  PresContext()->AppUnitsToDevPixels(aPoint.x),
     224               0 :                                  PresContext()->AppUnitsToDevPixels(aPoint.y))) {
     225               0 :       return nsnull;
     226                 :     }
     227                 :   }
     228                 : 
     229               0 :   return nsSVGInnerSVGFrameBase::GetFrameForPoint(aPoint);
     230                 : }
     231                 : 
     232                 : //----------------------------------------------------------------------
     233                 : // nsISVGSVGFrame methods:
     234                 : 
     235                 : void
     236               0 : nsSVGInnerSVGFrame::SuspendRedraw()
     237                 : {
     238               0 :   if (GetParent()->GetStateBits() & NS_STATE_SVG_REDRAW_SUSPENDED)
     239               0 :     return;
     240                 : 
     241               0 :   nsSVGUtils::NotifyRedrawSuspended(this);
     242                 : }
     243                 : 
     244                 : void
     245               0 : nsSVGInnerSVGFrame::UnsuspendRedraw()
     246                 : {
     247               0 :   if (GetParent()->GetStateBits() & NS_STATE_SVG_REDRAW_SUSPENDED)
     248               0 :     return;
     249                 : 
     250               0 :   nsSVGUtils::NotifyRedrawUnsuspended(this);
     251                 : }
     252                 : 
     253                 : void
     254               0 : nsSVGInnerSVGFrame::NotifyViewportChange()
     255                 : {
     256               0 :   NS_ERROR("Inner SVG frames should not get Viewport changes.");
     257               0 : }
     258                 : 
     259                 : //----------------------------------------------------------------------
     260                 : // nsSVGContainerFrame methods:
     261                 : 
     262                 : gfxMatrix
     263               0 : nsSVGInnerSVGFrame::GetCanvasTM()
     264                 : {
     265               0 :   if (!mCanvasTM) {
     266               0 :     NS_ASSERTION(mParent, "null parent");
     267                 : 
     268               0 :     nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
     269               0 :     nsSVGSVGElement *content = static_cast<nsSVGSVGElement*>(mContent);
     270                 : 
     271               0 :     gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
     272                 : 
     273               0 :     mCanvasTM = new gfxMatrix(tm);
     274                 :   }
     275               0 :   return *mCanvasTM;
     276                 : }
     277                 : 

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