DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (777e60ca8853)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// Main header first:
#include "nsSVGOuterSVGFrame.h"

// Keep others in (case-insensitive) order:
#include "nsDisplayList.h"
#include "nsIDocument.h"
#include "nsIDOMWindow.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIObjectLoadingContent.h"
#include "nsRenderingContext.h"
#include "nsSVGIntegrationUtils.h"
#include "nsSVGForeignObjectFrame.h"
#include "mozilla/dom/SVGSVGElement.h"
#include "mozilla/dom/SVGViewElement.h"
#include "nsSubDocumentFrame.h"

using namespace mozilla;
using namespace mozilla::dom;

//----------------------------------------------------------------------
// Implementation helpers

void
nsSVGOuterSVGFrame::RegisterForeignObject(nsSVGForeignObjectFrame* aFrame)
{
  NS_ASSERTION(aFrame, "Who on earth is calling us?!");

  if (!mForeignObjectHash) {
    mForeignObjectHash = new nsTHashtable<nsPtrHashKey<nsSVGForeignObjectFrame> >();
  }

  NS_ASSERTION(!mForeignObjectHash->GetEntry(aFrame),
               "nsSVGForeignObjectFrame already registered!");

  mForeignObjectHash->PutEntry(aFrame);

  NS_ASSERTION(mForeignObjectHash->GetEntry(aFrame),
               "Failed to register nsSVGForeignObjectFrame!");
}

void
nsSVGOuterSVGFrame::UnregisterForeignObject(nsSVGForeignObjectFrame* aFrame)
{
  NS_ASSERTION(aFrame, "Who on earth is calling us?!");
  NS_ASSERTION(mForeignObjectHash && mForeignObjectHash->GetEntry(aFrame),
               "nsSVGForeignObjectFrame not in registry!");
  return mForeignObjectHash->RemoveEntry(aFrame);
}

//----------------------------------------------------------------------
// Implementation

nsIFrame*
NS_NewSVGOuterSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{  
  return new (aPresShell) nsSVGOuterSVGFrame(aContext);
}

NS_IMPL_FRAMEARENA_HELPERS(nsSVGOuterSVGFrame)

nsSVGOuterSVGFrame::nsSVGOuterSVGFrame(nsStyleContext* aContext)
    : nsSVGOuterSVGFrameBase(aContext)
    , mFullZoom(aContext->PresContext()->GetFullZoom())
    , mViewportInitialized(false)
    , mIsRootContent(false)
{
  // Outer-<svg> has CSS layout, so remove this bit:
  RemoveStateBits(NS_FRAME_SVG_LAYOUT);
}

void
nsSVGOuterSVGFrame::Init(nsIContent* aContent,
                         nsIFrame* aParent,
                         nsIFrame* aPrevInFlow)
{
  NS_ASSERTION(aContent->IsSVG(nsGkAtoms::svg),
               "Content is not an SVG 'svg' element!");

  AddStateBits(NS_STATE_IS_OUTER_SVG |
               NS_FRAME_FONT_INFLATION_CONTAINER |
               NS_FRAME_FONT_INFLATION_FLOW_ROOT);

  // Check for conditional processing attributes here rather than in
  // nsCSSFrameConstructor::FindSVGData because we want to avoid
  // simply giving failing outer <svg> elements an nsSVGContainerFrame.
  // We don't create other SVG frames if PassesConditionalProcessingTests
  // returns false, but since we do create nsSVGOuterSVGFrame frames we
  // prevent them from painting by [ab]use NS_FRAME_IS_NONDISPLAY. The
  // frame will be recreated via an nsChangeHint_ReconstructFrame restyle if
  // the value returned by PassesConditionalProcessingTests changes.
  SVGSVGElement *svg = static_cast<SVGSVGElement*>(aContent);
  if (!svg->PassesConditionalProcessingTests()) {
    AddStateBits(NS_FRAME_IS_NONDISPLAY);
  }

  nsSVGOuterSVGFrameBase::Init(aContent, aParent, aPrevInFlow);

  nsIDocument* doc = mContent->GetCurrentDoc();
  if (doc) {
    // we only care about our content's zoom and pan values if it's the root element
    if (doc->GetRootElement() == mContent) {
      mIsRootContent = true;
    }
  }
}

//----------------------------------------------------------------------
// nsQueryFrame methods

NS_QUERYFRAME_HEAD(nsSVGOuterSVGFrame)
  NS_QUERYFRAME_ENTRY(nsISVGSVGFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsSVGOuterSVGFrameBase)

//----------------------------------------------------------------------
// nsIFrame methods
  
//----------------------------------------------------------------------
// reflowing

/* virtual */ nscoord
nsSVGOuterSVGFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
  nscoord result;
  DISPLAY_MIN_WIDTH(this, result);

  result = nscoord(0);

  return result;
}

/* virtual */ nscoord
nsSVGOuterSVGFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
  nscoord result;
  DISPLAY_PREF_WIDTH(this, result);

  SVGSVGElement *svg = static_cast<SVGSVGElement*>(mContent);
  nsSVGLength2 &width = svg->mLengthAttributes[SVGSVGElement::ATTR_WIDTH];

  if (width.IsPercentage()) {
    // It looks like our containing block's width may depend on our width. In
    // that case our behavior is undefined according to CSS 2.1 section 10.3.2,
    // so return zero.
    result = nscoord(0);
  } else {
    result = nsPresContext::CSSPixelsToAppUnits(width.GetAnimValue(svg));
    if (result < 0) {
      result = nscoord(0);
    }
  }

  return result;
}

/* virtual */ IntrinsicSize
nsSVGOuterSVGFrame::GetIntrinsicSize()
{
  // XXXjwatt Note that here we want to return the CSS width/height if they're
  // specified and we're embedded inside an nsIObjectLoadingContent.

  IntrinsicSize intrinsicSize;

  SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
  nsSVGLength2 &width  = content->mLengthAttributes[SVGSVGElement::ATTR_WIDTH];
  nsSVGLength2 &height = content->mLengthAttributes[SVGSVGElement::ATTR_HEIGHT];

  if (!width.IsPercentage()) {
    nscoord val = nsPresContext::CSSPixelsToAppUnits(width.GetAnimValue(content));
    if (val < 0) val = 0;
    intrinsicSize.width.SetCoordValue(val);
  }

  if (!height.IsPercentage()) {
    nscoord val = nsPresContext::CSSPixelsToAppUnits(height.GetAnimValue(content));
    if (val < 0) val = 0;
    intrinsicSize.height.SetCoordValue(val);
  }

  return intrinsicSize;
}

/* virtual */ nsSize
nsSVGOuterSVGFrame::GetIntrinsicRatio()
{
  // We only have an intrinsic size/ratio if our width and height attributes
  // are both specified and set to non-percentage values, or we have a viewBox
  // rect: http://www.w3.org/TR/SVGMobile12/coords.html#IntrinsicSizing

  SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
  nsSVGLength2 &width  = content->mLengthAttributes[SVGSVGElement::ATTR_WIDTH];
  nsSVGLength2 &height = content->mLengthAttributes[SVGSVGElement::ATTR_HEIGHT];

  if (!width.IsPercentage() && !height.IsPercentage()) {
    nsSize ratio(NSToCoordRoundWithClamp(width.GetAnimValue(content)),
                 NSToCoordRoundWithClamp(height.GetAnimValue(content)));
    if (ratio.width < 0) {
      ratio.width = 0;
    }
    if (ratio.height < 0) {
      ratio.height = 0;
    }
    return ratio;
  }

  SVGViewElement* viewElement = content->GetCurrentViewElement();
  const nsSVGViewBoxRect* viewbox = nullptr;

  // The logic here should match HasViewBox().
  if (viewElement && viewElement->mViewBox.HasRect()) {
    viewbox = &viewElement->mViewBox.GetAnimValue();
  } else if (content->mViewBox.HasRect()) {
    viewbox = &content->mViewBox.GetAnimValue();
  }

  if (viewbox) {
    float viewBoxWidth = viewbox->width;
    float viewBoxHeight = viewbox->height;

    if (viewBoxWidth < 0.0f) {
      viewBoxWidth = 0.0f;
    }
    if (viewBoxHeight < 0.0f) {
      viewBoxHeight = 0.0f;
    }
    return nsSize(NSToCoordRoundWithClamp(viewBoxWidth),
                  NSToCoordRoundWithClamp(viewBoxHeight));
  }

  return nsSVGOuterSVGFrameBase::GetIntrinsicRatio();
}

/* virtual */ nsSize
nsSVGOuterSVGFrame::ComputeSize(nsRenderingContext *aRenderingContext,
                                nsSize aCBSize, nscoord aAvailableWidth,
                                nsSize aMargin, nsSize aBorder, nsSize aPadding,
                                uint32_t aFlags)
{
  if (IsRootOfImage() || IsRootOfReplacedElementSubDoc()) {
    // The embedding element has sized itself using the CSS replaced element
    // sizing rules, using our intrinsic dimensions as necessary. The SVG spec
    // says that the width and height of embedded SVG is overridden by the
    // width and height of the embedding element, so we just need to size to
    // the viewport that the embedding element has established for us.
    return aCBSize;
  }

  nsSize cbSize = aCBSize;
  IntrinsicSize intrinsicSize = GetIntrinsicSize();

  if (!mContent->GetParent()) {
    // We're the root of the outermost browsing context, so we need to scale
    // cbSize by the full-zoom so that SVGs with percentage width/height zoom:

    NS_ASSERTION(aCBSize.width  != NS_AUTOHEIGHT &&
                 aCBSize.height != NS_AUTOHEIGHT,
                 "root should not have auto-width/height containing block");
    cbSize.width  *= PresContext()->GetFullZoom();
    cbSize.height *= PresContext()->GetFullZoom();

    // We also need to honour the width and height attributes' default values
    // of 100% when we're the root of a browsing context.  (GetIntrinsicSize()
    // doesn't report these since there's no such thing as a percentage
    // intrinsic size.  Also note that explicit percentage values are mapped
    // into style, so the following isn't for them.)

    SVGSVGElement* content = static_cast<SVGSVGElement*>(mContent);

    nsSVGLength2 &width =
      content->mLengthAttributes[SVGSVGElement::ATTR_WIDTH];
    if (width.IsPercentage()) {
      NS_ABORT_IF_FALSE(intrinsicSize.width.GetUnit() == eStyleUnit_None,
                        "GetIntrinsicSize should have reported no "
                        "intrinsic width");
      float val = width.GetAnimValInSpecifiedUnits() / 100.0f;
      if (val < 0.0f) val = 0.0f;
      intrinsicSize.width.SetCoordValue(val * cbSize.width);
    }

    nsSVGLength2 &height =
      content->mLengthAttributes[SVGSVGElement::ATTR_HEIGHT];
    NS_ASSERTION(aCBSize.height != NS_AUTOHEIGHT,
                 "root should not have auto-height containing block");
    if (height.IsPercentage()) {
      NS_ABORT_IF_FALSE(intrinsicSize.height.GetUnit() == eStyleUnit_None,
                        "GetIntrinsicSize should have reported no "
                        "intrinsic height");
      float val = height.GetAnimValInSpecifiedUnits() / 100.0f;
      if (val < 0.0f) val = 0.0f;
      intrinsicSize.height.SetCoordValue(val * cbSize.height);
    }
    NS_ABORT_IF_FALSE(intrinsicSize.height.GetUnit() == eStyleUnit_Coord &&
                      intrinsicSize.width.GetUnit() == eStyleUnit_Coord,
                      "We should have just handled the only situation where"
                      "we lack an intrinsic height or width.");
  }

  return nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(
                            aRenderingContext, this,
                            intrinsicSize, GetIntrinsicRatio(), cbSize,
                            aMargin, aBorder, aPadding);
}

nsresult
nsSVGOuterSVGFrame::Reflow(nsPresContext*           aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsReflowStatus&          aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsSVGOuterSVGFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                  ("enter nsSVGOuterSVGFrame::Reflow: availSize=%d,%d",
                  aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));

  NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");

  aStatus = NS_FRAME_COMPLETE;

  aDesiredSize.Width()  = aReflowState.ComputedWidth() +
                          aReflowState.ComputedPhysicalBorderPadding().LeftRight();
  aDesiredSize.Height() = aReflowState.ComputedHeight() +
                          aReflowState.ComputedPhysicalBorderPadding().TopBottom();

  NS_ASSERTION(!GetPrevInFlow(), "SVG can't currently be broken across pages.");

  SVGSVGElement *svgElem = static_cast<SVGSVGElement*>(mContent);

  nsSVGOuterSVGAnonChildFrame *anonKid =
    static_cast<nsSVGOuterSVGAnonChildFrame*>(GetFirstPrincipalChild());

  if (mState & NS_FRAME_FIRST_REFLOW) {
    // Initialize
    svgElem->UpdateHasChildrenOnlyTransform();
  }

  // If our SVG viewport has changed, update our content and notify.
  // http://www.w3.org/TR/SVG11/coords.html#ViewportSpace

  svgFloatSize newViewportSize(
    nsPresContext::AppUnitsToFloatCSSPixels(aReflowState.ComputedWidth()),
    nsPresContext::AppUnitsToFloatCSSPixels(aReflowState.ComputedHeight()));

  svgFloatSize oldViewportSize = svgElem->GetViewportSize();

  uint32_t changeBits = 0;
  if (newViewportSize != oldViewportSize) {
    // When our viewport size changes, we may need to update the overflow rects
    // of our child frames. This is the case if:
    //
    //  * We have a real/synthetic viewBox (a children-only transform), since
    //    the viewBox transform will change as the viewport dimensions change.
    //
    //  * We do not have a real/synthetic viewBox, but the last time we
    //    reflowed (or the last time UpdateOverflow() was called) we did.
    //
    // We only handle the former case here, in which case we mark all our child
    // frames as dirty so that we reflow them below and update their overflow
    // rects.
    //
    // In the latter case, updating of overflow rects is handled for removal of
    // real viewBox (the viewBox attribute) in AttributeChanged. Synthetic
    // viewBox "removal" (e.g. a document references the same SVG via both an
    // <svg:image> and then as a CSS background image (a synthetic viewBox is
    // used when painting the former, but not when painting the latter)) is
    // handled in SVGSVGElement::FlushImageTransformInvalidation.
    //
    if (svgElem->HasViewBoxOrSyntheticViewBox()) {
      nsIFrame* anonChild = GetFirstPrincipalChild();
      anonChild->AddStateBits(NS_FRAME_IS_DIRTY);
      for (nsIFrame* child = anonChild->GetFirstPrincipalChild(); child;
           child = child->GetNextSibling()) {
        child->AddStateBits(NS_FRAME_IS_DIRTY);
      }
    }
    changeBits |= COORD_CONTEXT_CHANGED;
    svgElem->SetViewportSize(newViewportSize);
  }
  if (mFullZoom != PresContext()->GetFullZoom()) {
    changeBits |= FULL_ZOOM_CHANGED;
    mFullZoom = PresContext()->GetFullZoom();
  }
  if (changeBits) {
    NotifyViewportOrTransformChanged(changeBits);
  }
  mViewportInitialized = true;

  // Now that we've marked the necessary children as dirty, call
  // ReflowSVG() or ReflowSVGNonDisplayText() on them, depending
  // on whether we are non-display.
  mCallingReflowSVG = true;
  if (GetStateBits() & NS_FRAME_IS_NONDISPLAY) {
    ReflowSVGNonDisplayText(this);
  } else {
    // Update the mRects and visual overflow rects of all our descendants,
    // including our anonymous wrapper kid:
    anonKid->AddStateBits(mState & NS_FRAME_IS_DIRTY);
    anonKid->ReflowSVG();
    NS_ABORT_IF_FALSE(!anonKid->GetNextSibling(),
      "We should have one anonymous child frame wrapping our real children");
  }
  mCallingReflowSVG = false;

  // Set our anonymous kid's offset from our border box:
  anonKid->SetPosition(GetContentRectRelativeToSelf().TopLeft());

  // Including our size in our overflow rects regardless of the value of
  // 'background', 'border', etc. makes sure that we usually (when we clip to
  // our content area) don't have to keep changing our overflow rects as our
  // descendants move about (see perf comment below). Including our size in our
  // scrollable overflow rect also makes sure that we scroll if we're too big
  // for our viewport.
  //
  // <svg> never allows scrolling to anything outside its mRect (only panning),
  // so we must always keep our scrollable overflow set to our size.
  //
  // With regards to visual overflow, we always clip root-<svg> (see our
  // BuildDisplayList method) regardless of the value of the 'overflow'
  // property since that is per-spec, even for the initial 'visible' value. For
  // that reason there's no point in adding descendant visual overflow to our
  // own when this frame is for a root-<svg>. That said, there's also a very
  // good performance reason for us wanting to avoid doing so. If we did, then
  // the frame's overflow would often change as descendants that are partially
  // or fully outside its rect moved (think animation on/off screen), and that
  // would cause us to do a full NS_FRAME_IS_DIRTY reflow and repaint of the
  // entire document tree each such move (see bug 875175).
  //
  // So it's only non-root outer-<svg> that has the visual overflow of its
  // descendants added to its own. (Note that the default user-agent style
  // sheet makes 'hidden' the default value for :not(root(svg)), so usually
  // FinishAndStoreOverflow will still clip this back to the frame's rect.)
  //
  // WARNING!! Keep UpdateBounds below in sync with whatever we do for our
  // overflow rects here! (Again, see bug 875175.)
  //
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  if (!mIsRootContent) {
    aDesiredSize.mOverflowAreas.VisualOverflow().UnionRect(
      aDesiredSize.mOverflowAreas.VisualOverflow(),
      anonKid->GetVisualOverflowRect() + anonKid->GetPosition());
  }
  FinishAndStoreOverflow(&aDesiredSize);

  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                  ("exit nsSVGOuterSVGFrame::Reflow: size=%d,%d",
                  aDesiredSize.Width(), aDesiredSize.Height()));
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
  return NS_OK;
}

nsresult
nsSVGOuterSVGFrame::DidReflow(nsPresContext*   aPresContext,
                              const nsHTMLReflowState*  aReflowState,
                              nsDidReflowStatus aStatus)
{
  nsresult rv = nsSVGOuterSVGFrameBase::DidReflow(aPresContext,aReflowState,aStatus);

  // Make sure elements styled by :hover get updated if script/animation moves
  // them under or out from under the pointer:
  PresContext()->PresShell()->SynthesizeMouseMove(false);

  return rv;
}

/* virtual */ bool
nsSVGOuterSVGFrame::UpdateOverflow()
{
  // See the comments in Reflow above.

  // WARNING!! Keep this in sync with Reflow above!

  nsRect rect(nsPoint(0, 0), GetSize());
  nsOverflowAreas overflowAreas(rect, rect);

  if (!mIsRootContent) {
    nsIFrame *anonKid = GetFirstPrincipalChild();
    overflowAreas.VisualOverflow().UnionRect(
      overflowAreas.VisualOverflow(),
      anonKid->GetVisualOverflowRect() + anonKid->GetPosition());
  }

  return FinishAndStoreOverflow(overflowAreas, GetSize());
}


//----------------------------------------------------------------------
// container methods

/**
 * Used to paint/hit-test SVG when SVG display lists are disabled.
 */
class nsDisplayOuterSVG : public nsDisplayItem {
public:
  nsDisplayOuterSVG(nsDisplayListBuilder* aBuilder,
                    nsSVGOuterSVGFrame* aFrame) :
    nsDisplayItem(aBuilder, aFrame) {
    MOZ_COUNT_CTOR(nsDisplayOuterSVG);
  }
#ifdef NS_BUILD_REFCNT_LOGGING
  virtual ~nsDisplayOuterSVG() {
    MOZ_COUNT_DTOR(nsDisplayOuterSVG);
  }
#endif

  virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
                       HitTestState* aState,
                       nsTArray<nsIFrame*> *aOutFrames) MOZ_OVERRIDE;
  virtual void Paint(nsDisplayListBuilder* aBuilder,
                     nsRenderingContext* aCtx) MOZ_OVERRIDE;

  virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                         const nsDisplayItemGeometry* aGeometry,
                                         nsRegion* aInvalidRegion) MOZ_OVERRIDE;

  NS_DISPLAY_DECL_NAME("SVGOuterSVG", TYPE_SVG_OUTER_SVG)
};

void
nsDisplayOuterSVG::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
                           HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
  nsSVGOuterSVGFrame *outerSVGFrame = static_cast<nsSVGOuterSVGFrame*>(mFrame);
  nsRect rectAtOrigin = aRect - ToReferenceFrame();
  nsRect thisRect(nsPoint(0,0), outerSVGFrame->GetSize());
  if (!thisRect.Intersects(rectAtOrigin))
    return;

  nsPoint rectCenter(rectAtOrigin.x + rectAtOrigin.width / 2,
                     rectAtOrigin.y + rectAtOrigin.height / 2);

  nsSVGOuterSVGAnonChildFrame *anonKid =
    static_cast<nsSVGOuterSVGAnonChildFrame*>(
      outerSVGFrame->GetFirstPrincipalChild());
  nsIFrame* frame = nsSVGUtils::HitTestChildren(
    anonKid, rectCenter + outerSVGFrame->GetPosition() -
               outerSVGFrame->GetContentRect().TopLeft());
  if (frame) {
    aOutFrames->AppendElement(frame);
  }
}

void
nsDisplayOuterSVG::Paint(nsDisplayListBuilder* aBuilder,
                         nsRenderingContext* aContext)
{
#if defined(DEBUG) && defined(SVG_DEBUG_PAINT_TIMING)
  PRTime start = PR_Now();
#endif

  // Create an SVGAutoRenderState so we can call SetPaintingToWindow on
  // it, but do so without changing the render mode:
  SVGAutoRenderState state(aContext, SVGAutoRenderState::GetRenderMode(aContext));

  if (aBuilder->IsPaintingToWindow()) {
    state.SetPaintingToWindow(true);
  }

  nsRect viewportRect =
    mFrame->GetContentRectRelativeToSelf() + ToReferenceFrame();

  nsRect clipRect = mVisibleRect.Intersect(viewportRect);

  nsIntRect contentAreaDirtyRect =
    (clipRect - viewportRect.TopLeft()).
      ToOutsidePixels(mFrame->PresContext()->AppUnitsPerDevPixel());

  aContext->PushState();
  aContext->Translate(viewportRect.TopLeft());
  nsSVGUtils::PaintFrameWithEffects(aContext, &contentAreaDirtyRect, mFrame);
  aContext->PopState();

  NS_ASSERTION(!aContext->ThebesContext()->HasError(), "Cairo in error state");

#if defined(DEBUG) && defined(SVG_DEBUG_PAINT_TIMING)
  PRTime end = PR_Now();
  printf("SVG Paint Timing: %f ms\n", (end-start)/1000.0);
#endif
}

static PLDHashOperator CheckForeignObjectInvalidatedArea(nsPtrHashKey<nsSVGForeignObjectFrame>* aEntry, void* aData)
{
  nsRegion* region = static_cast<nsRegion*>(aData);
  region->Or(*region, aEntry->GetKey()->GetInvalidRegion());
  return PL_DHASH_NEXT;
}

nsRegion
nsSVGOuterSVGFrame::FindInvalidatedForeignObjectFrameChildren(nsIFrame* aFrame)
{
  nsRegion result;
  if (mForeignObjectHash && mForeignObjectHash->Count()) {
    mForeignObjectHash->EnumerateEntries(CheckForeignObjectInvalidatedArea, &result);
  }
  return result;
}

void
nsDisplayOuterSVG::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                             const nsDisplayItemGeometry* aGeometry,
                                             nsRegion* aInvalidRegion)
{
  nsSVGOuterSVGFrame *frame = static_cast<nsSVGOuterSVGFrame*>(mFrame);
  frame->InvalidateSVG(frame->FindInvalidatedForeignObjectFrameChildren(frame));

  nsRegion result = frame->GetInvalidRegion();
  result.MoveBy(ToReferenceFrame());
  frame->ClearInvalidRegion();

  nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
  aInvalidRegion->Or(*aInvalidRegion, result);
}

// helper
static inline bool
DependsOnIntrinsicSize(const nsIFrame* aEmbeddingFrame)
{
  const nsStylePosition *pos = aEmbeddingFrame->StylePosition();
  const nsStyleCoord &width = pos->mWidth;
  const nsStyleCoord &height = pos->mHeight;

  // XXX it would be nice to know if the size of aEmbeddingFrame's containing
  // block depends on aEmbeddingFrame, then we'd know if we can return false
  // for eStyleUnit_Percent too.
  return !width.ConvertsToLength() ||
         !height.ConvertsToLength();
}

nsresult
nsSVGOuterSVGFrame::AttributeChanged(int32_t  aNameSpaceID,
                                     nsIAtom* aAttribute,
                                     int32_t  aModType)
{
  if (aNameSpaceID == kNameSpaceID_None &&
      !(GetStateBits() & (NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_NONDISPLAY))) {
    if (aAttribute == nsGkAtoms::viewBox ||
        aAttribute == nsGkAtoms::preserveAspectRatio ||
        aAttribute == nsGkAtoms::transform) {

      // make sure our cached transform matrix gets (lazily) updated
      mCanvasTM = nullptr;

      nsSVGUtils::NotifyChildrenOfSVGChange(GetFirstPrincipalChild(),
                aAttribute == nsGkAtoms::viewBox ?
                  TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED);

      if (aAttribute != nsGkAtoms::transform) {
        static_cast<SVGSVGElement*>(mContent)->ChildrenOnlyTransformChanged();
      }

    } else if (aAttribute == nsGkAtoms::width ||
               aAttribute == nsGkAtoms::height) {

      // Don't call ChildrenOnlyTransformChanged() here, since we call it
      // under Reflow if the width/height actually changed.

      nsIFrame* embeddingFrame;
      if (IsRootOfReplacedElementSubDoc(&embeddingFrame) && embeddingFrame) {
        if (DependsOnIntrinsicSize(embeddingFrame)) {
          // Tell embeddingFrame's presShell it needs to be reflowed (which takes
          // care of reflowing us too).
          embeddingFrame->PresContext()->PresShell()->
            FrameNeedsReflow(embeddingFrame, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
        }
        // else our width and height is overridden - don't reflow anything
      } else {
        // We are not embedded by reference, so our 'width' and 'height'
        // attributes are not overridden - we need to reflow.
        PresContext()->PresShell()->
          FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
      }
    }
  }

  return NS_OK;
}

//----------------------------------------------------------------------
// painting

void
nsSVGOuterSVGFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                     const nsRect&           aDirtyRect,
                                     const nsDisplayListSet& aLists)
{
  if (GetStateBits() & NS_FRAME_IS_NONDISPLAY) {
    return;
  }

  DisplayBorderBackgroundOutline(aBuilder, aLists);

  // Per-spec, we always clip root-<svg> even when 'overflow' has its initial
  // value of 'visible'. See also the "visual overflow" comments in Reflow.
  DisplayListClipState::AutoSaveRestore autoSR(aBuilder);
  if (mIsRootContent ||
      StyleDisplay()->IsScrollableOverflow()) {
    autoSR.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
  }

  if ((aBuilder->IsForEventDelivery() &&
       NS_SVGDisplayListHitTestingEnabled()) ||
      NS_SVGDisplayListPaintingEnabled()) {
    nsDisplayList *contentList = aLists.Content();
    nsDisplayListSet set(contentList, contentList, contentList,
                         contentList, contentList, contentList);
    BuildDisplayListForNonBlockChildren(aBuilder, aDirtyRect, set);
  } else {
    aLists.Content()->AppendNewToTop(
      new (aBuilder) nsDisplayOuterSVG(aBuilder, this));
  }
}

nsSplittableType
nsSVGOuterSVGFrame::GetSplittableType() const
{
  return NS_FRAME_NOT_SPLITTABLE;
}

nsIAtom *
nsSVGOuterSVGFrame::GetType() const
{
  return nsGkAtoms::svgOuterSVGFrame;
}

//----------------------------------------------------------------------
// nsISVGSVGFrame methods:

void
nsSVGOuterSVGFrame::NotifyViewportOrTransformChanged(uint32_t aFlags)
{
  NS_ABORT_IF_FALSE(aFlags &&
                    !(aFlags & ~(COORD_CONTEXT_CHANGED | TRANSFORM_CHANGED |
                                 FULL_ZOOM_CHANGED)),
                    "Unexpected aFlags value");

  // No point in doing anything when were not init'ed yet:
  if (!mViewportInitialized) {
    return;
  }

  SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);

  if (aFlags & COORD_CONTEXT_CHANGED) {
    if (content->HasViewBoxRect()) {
      // Percentage lengths on children resolve against the viewBox rect so we
      // don't need to notify them of the viewport change, but the viewBox
      // transform will have changed, so we need to notify them of that instead.
      aFlags = TRANSFORM_CHANGED;
    }
    else if (content->ShouldSynthesizeViewBox()) {
      // In the case of a synthesized viewBox, the synthetic viewBox's rect
      // changes as the viewport changes. As a result we need to maintain the
      // COORD_CONTEXT_CHANGED flag.
      aFlags |= TRANSFORM_CHANGED;
    }
    else if (mCanvasTM && mCanvasTM->IsSingular()) {
      // A width/height of zero will result in us having a singular mCanvasTM
      // even when we don't have a viewBox. So we also want to recompute our
      // mCanvasTM for this width/height change even though we don't have a
      // viewBox.
      aFlags |= TRANSFORM_CHANGED;
    }
  }

  bool haveNonFulLZoomTransformChange = (aFlags & TRANSFORM_CHANGED);

  if (aFlags & FULL_ZOOM_CHANGED) {
    // Convert FULL_ZOOM_CHANGED to TRANSFORM_CHANGED:
    aFlags = (aFlags & ~FULL_ZOOM_CHANGED) | TRANSFORM_CHANGED;
  }

  if (aFlags & TRANSFORM_CHANGED) {
    // Make sure our canvas transform matrix gets (lazily) recalculated:
    mCanvasTM = nullptr;

    if (haveNonFulLZoomTransformChange &&
        !(mState & NS_FRAME_IS_NONDISPLAY)) {
      uint32_t flags = (mState & NS_FRAME_IN_REFLOW) ?
                         SVGSVGElement::eDuringReflow : 0;
      content->ChildrenOnlyTransformChanged(flags);
    }
  }

  nsSVGUtils::NotifyChildrenOfSVGChange(GetFirstPrincipalChild(), aFlags);
}

//----------------------------------------------------------------------
// nsISVGChildFrame methods:

nsresult
nsSVGOuterSVGFrame::PaintSVG(nsRenderingContext* aContext,
                             const nsIntRect *aDirtyRect,
                             nsIFrame* aTransformRoot)
{
  NS_ASSERTION(GetFirstPrincipalChild()->GetType() ==
                 nsGkAtoms::svgOuterSVGAnonChildFrame &&
               !GetFirstPrincipalChild()->GetNextSibling(),
               "We should have a single, anonymous, child");
  nsSVGOuterSVGAnonChildFrame *anonKid =
    static_cast<nsSVGOuterSVGAnonChildFrame*>(GetFirstPrincipalChild());
  return anonKid->PaintSVG(aContext, aDirtyRect, aTransformRoot);
}

SVGBBox
nsSVGOuterSVGFrame::GetBBoxContribution(const gfx::Matrix &aToBBoxUserspace,
                                        uint32_t aFlags)
{
  NS_ASSERTION(GetFirstPrincipalChild()->GetType() ==
                 nsGkAtoms::svgOuterSVGAnonChildFrame &&
               !GetFirstPrincipalChild()->GetNextSibling(),
               "We should have a single, anonymous, child");
  // We must defer to our child so that we don't include our
  // content->PrependLocalTransformsTo() transforms.
  nsSVGOuterSVGAnonChildFrame *anonKid =
    static_cast<nsSVGOuterSVGAnonChildFrame*>(GetFirstPrincipalChild());
  return anonKid->GetBBoxContribution(aToBBoxUserspace, aFlags);
}

//----------------------------------------------------------------------
// nsSVGContainerFrame methods:

gfxMatrix
nsSVGOuterSVGFrame::GetCanvasTM(uint32_t aFor, nsIFrame* aTransformRoot)
{
  if (!(GetStateBits() & NS_FRAME_IS_NONDISPLAY) && !aTransformRoot) {
    if ((aFor == FOR_PAINTING && NS_SVGDisplayListPaintingEnabled()) ||
        (aFor == FOR_HIT_TESTING && NS_SVGDisplayListHitTestingEnabled())) {
      return nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(this);
    }
  }
  if (!mCanvasTM) {
    NS_ASSERTION(!aTransformRoot, "transform root will be ignored here");
    SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);

    float devPxPerCSSPx =
      1.0f / PresContext()->AppUnitsToFloatCSSPixels(
                                PresContext()->AppUnitsPerDevPixel());

    gfxMatrix tm = content->PrependLocalTransformsTo(
                     gfxMatrix().Scale(devPxPerCSSPx, devPxPerCSSPx));
    mCanvasTM = new gfxMatrix(tm);
  }
  return *mCanvasTM;
}

//----------------------------------------------------------------------
// Implementation helpers

bool
nsSVGOuterSVGFrame::IsRootOfReplacedElementSubDoc(nsIFrame **aEmbeddingFrame)
{
  if (!mContent->GetParent()) {
    // Our content is the document element
    nsCOMPtr<nsISupports> container = PresContext()->GetContainerWeak();
    nsCOMPtr<nsIDOMWindow> window = do_GetInterface(container);
    if (window) {
      nsCOMPtr<nsIDOMElement> frameElement;
      window->GetFrameElement(getter_AddRefs(frameElement));
      nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(frameElement);
      if (olc) {
        // Our document is inside an HTML 'object', 'embed' or 'applet' element
        if (aEmbeddingFrame) {
          nsCOMPtr<nsIContent> element = do_QueryInterface(frameElement);
          *aEmbeddingFrame = element->GetPrimaryFrame();
          NS_ASSERTION(*aEmbeddingFrame, "Yikes, no embedding frame!");
        }
        return true;
      }
    }
  }
  if (aEmbeddingFrame) {
    *aEmbeddingFrame = nullptr;
  }
  return false;
}

bool
nsSVGOuterSVGFrame::IsRootOfImage()
{
  if (!mContent->GetParent()) {
    // Our content is the document element
    nsIDocument* doc = mContent->GetCurrentDoc();
    if (doc && doc->IsBeingUsedAsImage()) {
      // Our document is being used as an image
      return true;
    }
  }

  return false;
}

bool
nsSVGOuterSVGFrame::VerticalScrollbarNotNeeded() const
{
  nsSVGLength2 &height = static_cast<SVGSVGElement*>(mContent)->
                           mLengthAttributes[SVGSVGElement::ATTR_HEIGHT];
  return height.IsPercentage() && height.GetBaseValInSpecifiedUnits() <= 100;
}


//----------------------------------------------------------------------
// Implementation of nsSVGOuterSVGAnonChildFrame

nsIFrame*
NS_NewSVGOuterSVGAnonChildFrame(nsIPresShell* aPresShell,
                                nsStyleContext* aContext)
{
  return new (aPresShell) nsSVGOuterSVGAnonChildFrame(aContext);
}

NS_IMPL_FRAMEARENA_HELPERS(nsSVGOuterSVGAnonChildFrame)

#ifdef DEBUG
void
nsSVGOuterSVGAnonChildFrame::Init(nsIContent* aContent,
                                  nsIFrame* aParent,
                                  nsIFrame* aPrevInFlow)
{
  NS_ABORT_IF_FALSE(aParent->GetType() == nsGkAtoms::svgOuterSVGFrame,
                    "Unexpected parent");
  nsSVGOuterSVGAnonChildFrameBase::Init(aContent, aParent, aPrevInFlow);
}
#endif

nsIAtom *
nsSVGOuterSVGAnonChildFrame::GetType() const
{
  return nsGkAtoms::svgOuterSVGAnonChildFrame;
}

bool
nsSVGOuterSVGAnonChildFrame::HasChildrenOnlyTransform(gfx::Matrix *aTransform) const
{
  // We must claim our nsSVGOuterSVGFrame's children-only transforms as our own
  // so that the children we are used to wrap are transformed properly.

  SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);

  bool hasTransform = content->HasChildrenOnlyTransform();

  if (hasTransform && aTransform) {
    // Outer-<svg> doesn't use x/y, so we can pass eChildToUserSpace here.
    gfxMatrix identity;
    *aTransform = gfx::ToMatrix(
      content->PrependLocalTransformsTo(identity,
                                        nsSVGElement::eChildToUserSpace));
  }

  return hasTransform;
}