Quelle GridTracks.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#include "GridTracks.h"

#include "GridDimension.h"
#include "GridTrack.h"
#include "mozilla/dom/GridBinding.h"
#include "nsGridContainerFrame.h"

namespace mozilla::dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridTracks, mParent, mTracks)
NS_IMPL_CYCLE_COLLECTING_ADDREF(GridTracks)
NS_IMPL_CYCLE_COLLECTING_RELEASE(GridTracks)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridTracks)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

GridTracks::GridTracks(GridDimension* aParent) : mParent(aParent) {
  MOZ_ASSERT(aParent, "Should never be instantiated with a null GridDimension");
}

GridTracks::~GridTracks() = default;

JSObject* GridTracks::WrapObject(JSContext* aCx,
                                 JS::Handle<JSObject*> aGivenProto) {
  return GridTracks_Binding::Wrap(aCx, this, aGivenProto);
}

uint32_t GridTracks::Length() const { return mTracks.Length(); }

GridTrack* GridTracks::Item(uint32_t aIndex) {
  return mTracks.SafeElementAt(aIndex);
}

GridTrack* GridTracks::IndexedGetter(uint32_t aIndex, bool& aFound) {
  aFound = aIndex < mTracks.Length();
  if (!aFound) {
    return nullptr;
  }
  return mTracks[aIndex];
}

void GridTracks::SetTrackInfo(const ComputedGridTrackInfo* aTrackInfo) {
  // rebuild the tracks based on aTrackInfo
  mTracks.Clear();

  if (!aTrackInfo) {
    return;
  }

  nscoord lastTrackEdge = 0;
  uint32_t repeatIndex = 0;
  auto AppendRemovedAutoFits = [this, &aTrackInfo, &lastTrackEdge,
                                &repeatIndex]() {
    uint32_t numRepeatTracks = aTrackInfo->mRemovedRepeatTracks.Length();
    // Add in removed auto-fit tracks
    while (repeatIndex < numRepeatTracks &&
           aTrackInfo->mRemovedRepeatTracks[repeatIndex]) {
      RefPtr<GridTrack> track = new GridTrack(this);
      mTracks.AppendElement(track);
      track->SetTrackValues(
          nsPresContext::AppUnitsToDoubleCSSPixels(lastTrackEdge),
          nsPresContext::AppUnitsToDoubleCSSPixels(0),
          GridDeclaration::Explicit, GridTrackState::Removed);
      repeatIndex++;
    }
    repeatIndex++;
  };

  for (size_t i = aTrackInfo->mStartFragmentTrack;
       i < aTrackInfo->mEndFragmentTrack; i++) {
    if (i >= aTrackInfo->mRepeatFirstTrack) {
      // Append removed auto-fit tracks, if appropriate. The
      // AppendRemovedAutoFits function exits early once it has been called
      // aTrackInfo->mRemovedRepeatTracks.Length() times -- a check we don't
      // replicate here or at subsequent calling sites.
      AppendRemovedAutoFits();
    }

    RefPtr<GridTrack> track = new GridTrack(this);
    mTracks.AppendElement(track);
    track->SetTrackValues(
        nsPresContext::AppUnitsToDoubleCSSPixels(aTrackInfo->mPositions[i]),
        nsPresContext::AppUnitsToDoubleCSSPixels(aTrackInfo->mSizes[i]),
        (
            // Implicit if index is before the first explicit track, or after
            // the last explicit track.
            (i < aTrackInfo->mNumLeadingImplicitTracks) ||
                    (i >= aTrackInfo->mNumLeadingImplicitTracks +
                              aTrackInfo->mNumExplicitTracks)
                ? GridDeclaration::Implicit
                : GridDeclaration::Explicit),
        GridTrackState(aTrackInfo->mStates[i]));

    lastTrackEdge = aTrackInfo->mPositions[i] + aTrackInfo->mSizes[i];
  }

  // Append any trailing removed auto-fit tracks.
  AppendRemovedAutoFits();
}

}  // namespace mozilla::dom

quality85%

¤ Dauer der Verarbeitung: 0.0 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.