зеркало из https://github.com/mozilla/gecko-dev.git
109 строки
2.7 KiB
C++
109 строки
2.7 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GridLines.h"
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#include "GridDimension.h"
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#include "GridLine.h"
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#include "mozilla/dom/GridBinding.h"
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#include "nsGridContainerFrame.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridLines, mParent, mLines)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(GridLines)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(GridLines)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridLines)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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GridLines::GridLines(GridDimension* aParent)
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: mParent(aParent)
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{
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MOZ_ASSERT(aParent,
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"Should never be instantiated with a null GridDimension");
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}
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GridLines::~GridLines()
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{
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}
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JSObject*
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GridLines::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return GridLinesBinding::Wrap(aCx, this, aGivenProto);
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}
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uint32_t
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GridLines::Length() const
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{
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return mLines.Length();
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}
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GridLine*
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GridLines::Item(uint32_t aIndex)
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{
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return mLines.SafeElementAt(aIndex);
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}
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GridLine*
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GridLines::IndexedGetter(uint32_t aIndex,
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bool& aFound)
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{
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aFound = aIndex < mLines.Length();
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if (!aFound) {
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return nullptr;
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}
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return mLines[aIndex];
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}
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void
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GridLines::SetLineInfo(const ComputedGridTrackInfo* aTrackInfo)
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{
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mLines.Clear();
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if (!aTrackInfo) {
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return;
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}
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uint32_t trackCount = aTrackInfo->mEndFragmentTrack -
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aTrackInfo->mStartFragmentTrack;
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// If there is at least one track, line count is one more
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// than the number of tracks.
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if (trackCount > 0) {
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double endOfLastTrack = 0.0;
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double startOfNextTrack;
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for (uint32_t i = aTrackInfo->mStartFragmentTrack;
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i < aTrackInfo->mEndFragmentTrack + 1;
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i++) {
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startOfNextTrack = (i < aTrackInfo->mEndFragmentTrack) ?
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aTrackInfo->mPositions[i] :
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endOfLastTrack;
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GridLine* line = new GridLine(this);
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mLines.AppendElement(line);
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line->SetLineValues(
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nsPresContext::AppUnitsToDoubleCSSPixels(endOfLastTrack),
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nsPresContext::AppUnitsToDoubleCSSPixels(startOfNextTrack -
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endOfLastTrack),
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i + 1,
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nsTArray<nsString>()
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);
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if (i < aTrackInfo->mEndFragmentTrack) {
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endOfLastTrack = aTrackInfo->mPositions[i] + aTrackInfo->mSizes[i];
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}
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}
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}
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}
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} // namespace dom
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} // namespace mozilla
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