dom/flex/FlexLineValues.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "FlexLineValues.h"
   8
   9 #include "Flex.h"
  10 #include "FlexItemValues.h"
  11 #include "mozilla/dom/FlexBinding.h"
  12 #include "nsFlexContainerFrame.h"
  13
  14 namespace mozilla::dom {
  15
  16 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FlexLineValues, mParent, mItems)
  17 NS_IMPL_CYCLE_COLLECTING_ADDREF(FlexLineValues)
  18 NS_IMPL_CYCLE_COLLECTING_RELEASE(FlexLineValues)
  19 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FlexLineValues)
  20   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  21   NS_INTERFACE_MAP_ENTRY(nsISupports)
  22 NS_INTERFACE_MAP_END
  23
  24 FlexLineValues::FlexLineValues(Flex* aParent, const ComputedFlexLineInfo* aLine)
  25     : mParent(aParent) {
  26   MOZ_ASSERT(aLine,
  27              "Should never be instantiated with a null ComputedFlexLineInfo.");
  28
  29   // Eagerly copy values from aLine, because we're not
  30   // going to keep it around.
  31   mGrowthState = aLine->mGrowthState;
  32
  33   // Convert all the app unit values into css pixels.
  34   mCrossStart = nsPresContext::AppUnitsToDoubleCSSPixels(aLine->mCrossStart);
  35   mCrossSize = nsPresContext::AppUnitsToDoubleCSSPixels(aLine->mCrossSize);
  36   mFirstBaselineOffset =
  37       nsPresContext::AppUnitsToDoubleCSSPixels(aLine->mFirstBaselineOffset);
  38   mLastBaselineOffset =
  39       nsPresContext::AppUnitsToDoubleCSSPixels(aLine->mLastBaselineOffset);
  40
  41   mItems.SetLength(aLine->mItems.Length());
  42   uint32_t index = 0;
  43   for (auto&& i : aLine->mItems) {
  44     FlexItemValues* item = new FlexItemValues(this, &i);
  45     mItems.ElementAt(index) = item;
  46     index++;
  47   }
  48 }
  49
  50 JSObject* FlexLineValues::WrapObject(JSContext* aCx,
  51                                      JS::Handle<JSObject*> aGivenProto) {
  52   return FlexLineValues_Binding::Wrap(aCx, this, aGivenProto);
  53 }
  54
  55 FlexLineGrowthState FlexLineValues::GrowthState() const { return mGrowthState; }
  56
  57 double FlexLineValues::CrossStart() const { return mCrossStart; }
  58
  59 double FlexLineValues::CrossSize() const { return mCrossSize; }
  60
  61 double FlexLineValues::FirstBaselineOffset() const {
  62   return mFirstBaselineOffset;
  63 }
  64
  65 double FlexLineValues::LastBaselineOffset() const {
  66   return mLastBaselineOffset;
  67 }
  68
  69 void FlexLineValues::GetItems(nsTArray<RefPtr<FlexItemValues>>& aResult) {
  70   aResult.AppendElements(mItems);
  71 }
  72
  73 }  // namespace mozilla::dom