Add m-esr52 at 52.6.0

1 files changed, 250 insertions, 0 deletions

diff --git a/dom/grid/GridLines.cpp b/dom/grid/GridLines.cpp
new file mode 100644
index 0000000000..fac645c64b
--- /dev/null
+++ b/dom/grid/GridLines.cpp
@@ -0,0 +1,250 @@
+/* -*- 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 "GridLines.h"
+
+#include "GridDimension.h"
+#include "GridLine.h"
+#include "mozilla/dom/GridBinding.h"
+#include "nsGridContainerFrame.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GridLines, mParent, mLines)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(GridLines)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(GridLines)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GridLines)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+GridLines::GridLines(GridDimension* aParent)
+  : mParent(aParent)
+{
+  MOZ_ASSERT(aParent,
+    "Should never be instantiated with a null GridDimension");
+}
+
+GridLines::~GridLines()
+{
+}
+
+JSObject*
+GridLines::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return GridLinesBinding::Wrap(aCx, this, aGivenProto);
+}
+
+uint32_t
+GridLines::Length() const
+{
+  return mLines.Length();
+}
+
+GridLine*
+GridLines::Item(uint32_t aIndex)
+{
+  return mLines.SafeElementAt(aIndex);
+}
+
+GridLine*
+GridLines::IndexedGetter(uint32_t aIndex,
+                         bool& aFound)
+{
+  aFound = aIndex < mLines.Length();
+  if (!aFound) {
+    return nullptr;
+  }
+  return mLines[aIndex];
+}
+
+void
+GridLines::SetLineInfo(const ComputedGridTrackInfo* aTrackInfo,
+                       const ComputedGridLineInfo* aLineInfo,
+                       const nsTArray<RefPtr<GridArea>>& aAreas,
+                       bool aIsRow)
+{
+  MOZ_ASSERT(aLineInfo);
+  mLines.Clear();
+
+  if (!aTrackInfo) {
+    return;
+  }
+
+  uint32_t trackCount = aTrackInfo->mEndFragmentTrack -
+                        aTrackInfo->mStartFragmentTrack;
+
+  // If there is at least one track, line count is one more
+  // than the number of tracks.
+  if (trackCount > 0) {
+    nscoord lastTrackEdge = 0;
+    nscoord startOfNextTrack;
+    uint32_t repeatIndex = 0;
+    uint32_t numRepeatTracks = aTrackInfo->mRemovedRepeatTracks.Length();
+    uint32_t numAddedLines = 0;
+
+    for (uint32_t i = aTrackInfo->mStartFragmentTrack;
+         i < aTrackInfo->mEndFragmentTrack + 1;
+         i++) {
+      uint32_t line1Index = i + 1;
+
+      startOfNextTrack = (i < aTrackInfo->mEndFragmentTrack) ?
+                         aTrackInfo->mPositions[i] :
+                         lastTrackEdge;
+
+      nsTArray<nsString> lineNames;
+      lineNames = aLineInfo->mNames.SafeElementAt(i, nsTArray<nsString>());
+
+      // Add in names from grid areas where this line is used as a boundary.
+      for (auto area : aAreas) {
+        bool haveNameToAdd = false;
+        nsAutoString nameToAdd;
+        area->GetName(nameToAdd);
+        if (aIsRow) {
+          if (area->RowStart() == line1Index) {
+            haveNameToAdd = true;
+            nameToAdd.AppendLiteral("-start");
+          } else if (area->RowEnd() == line1Index) {
+            haveNameToAdd = true;
+            nameToAdd.AppendLiteral("-end");
+          }
+        } else {
+          if (area->ColumnStart() == line1Index) {
+            haveNameToAdd = true;
+            nameToAdd.AppendLiteral("-start");
+          } else if (area->ColumnEnd() == line1Index) {
+            haveNameToAdd = true;
+            nameToAdd.AppendLiteral("-end");
+          }
+        }
+
+        if (haveNameToAdd && !lineNames.Contains(nameToAdd)) {
+          lineNames.AppendElement(nameToAdd);
+        }
+      }
+
+      if (i >= aTrackInfo->mRepeatFirstTrack &&
+          repeatIndex < numRepeatTracks) {
+        numAddedLines += AppendRemovedAutoFits(aTrackInfo,
+                                               aLineInfo,
+                                               lastTrackEdge,
+                                               repeatIndex,
+                                               numRepeatTracks,
+                                               lineNames);
+      }
+
+      RefPtr<GridLine> line = new GridLine(this);
+      mLines.AppendElement(line);
+      line->SetLineValues(
+        lineNames,
+        nsPresContext::AppUnitsToDoubleCSSPixels(lastTrackEdge),
+        nsPresContext::AppUnitsToDoubleCSSPixels(startOfNextTrack -
+                                                 lastTrackEdge),
+        line1Index + numAddedLines,
+        (
+          // Implicit if there are no explicit tracks, or if the index
+          // is before the first explicit track, or after
+          // a track beyond the last explicit track.
+          (aTrackInfo->mNumExplicitTracks == 0) ||
+          (i < aTrackInfo->mNumLeadingImplicitTracks) ||
+          (i > aTrackInfo->mNumLeadingImplicitTracks +
+               aTrackInfo->mNumExplicitTracks) ?
+            GridDeclaration::Implicit :
+            GridDeclaration::Explicit
+        )
+      );
+
+      if (i < aTrackInfo->mEndFragmentTrack) {
+        lastTrackEdge = aTrackInfo->mPositions[i] + aTrackInfo->mSizes[i];
+      }
+    }
+  }
+}
+
+uint32_t
+GridLines::AppendRemovedAutoFits(const ComputedGridTrackInfo* aTrackInfo,
+                                 const ComputedGridLineInfo* aLineInfo,
+                                 nscoord aLastTrackEdge,
+                                 uint32_t& aRepeatIndex,
+                                 uint32_t aNumRepeatTracks,
+                                 nsTArray<nsString>& aLineNames)
+{
+  // Check to see if lineNames contains ALL of the before line names.
+  bool alreadyHasBeforeLineNames = true;
+  for (const auto& beforeName : aLineInfo->mNamesBefore) {
+    if (!aLineNames.Contains(beforeName)) {
+      alreadyHasBeforeLineNames = false;
+      break;
+    }
+  }
+
+  bool extractedExplicitLineNames = false;
+  nsTArray<nsString> explicitLineNames;
+  uint32_t linesAdded = 0;
+  while (aRepeatIndex < aNumRepeatTracks &&
+         aTrackInfo->mRemovedRepeatTracks[aRepeatIndex]) {
+    // If this is not the very first call to this function, and if we
+    // haven't already added a line this call, pull all the explicit
+    // names to pass along to the next line that will be added after
+    // this function completes.
+    if (aRepeatIndex > 0 &&
+        linesAdded == 0) {
+      // Find the names that didn't match the before or after names,
+      // and extract them.
+      for (const auto& name : aLineNames) {
+        if (!aLineInfo->mNamesBefore.Contains(name) &&
+            !aLineInfo->mNamesAfter.Contains(name)) {
+          explicitLineNames.AppendElement(name);
+        }
+      }
+      for (const auto& extractedName : explicitLineNames) {
+        aLineNames.RemoveElement(extractedName);
+      }
+      extractedExplicitLineNames = true;
+    }
+
+    // If this is the second or later time through, or didn't already
+    // have before names, add them.
+    if (linesAdded > 0 || !alreadyHasBeforeLineNames) {
+      aLineNames.AppendElements(aLineInfo->mNamesBefore);
+    }
+
+    RefPtr<GridLine> line = new GridLine(this);
+    mLines.AppendElement(line);
+    line->SetLineValues(
+      aLineNames,
+      nsPresContext::AppUnitsToDoubleCSSPixels(aLastTrackEdge),
+      nsPresContext::AppUnitsToDoubleCSSPixels(0),
+      aTrackInfo->mRepeatFirstTrack + aRepeatIndex + 1,
+      GridDeclaration::Explicit
+    );
+
+    // No matter what, the next line should have the after names associated
+    // with it. If we go through the loop again, the before names will also
+    // be added.
+    aLineNames = aLineInfo->mNamesAfter;
+    aRepeatIndex++;
+
+    linesAdded++;
+  }
+  aRepeatIndex++;
+
+  if (extractedExplicitLineNames) {
+    // Pass on the explicit names we saved to the next explicit line.
+    aLineNames.AppendElements(explicitLineNames);
+  }
+
+  if (alreadyHasBeforeLineNames && linesAdded > 0) {
+    // If we started with before names, pass them on to the next explicit
+    // line.
+    aLineNames.AppendElements(aLineInfo->mNamesBefore);
+  }
+  return linesAdded;
+}
+
+} // namespace dom
+} // namespace mozilla