[LayoutNG] Inline margin/border/padding, inter-item breaking, and tests

third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/inline/ng_inline_item.h"
 
+#include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutObject.h"
 #include "platform/fonts/CharacterRange.h"
 #include "platform/fonts/shaping/ShapeResultBuffer.h"
 
 namespace blink {
 namespace {
 
 const char* kNGInlineItemTypeStrings[] = {
     "Text",     "Control",  "AtomicInline",        "OpenTag",
     "CloseTag", "Floating", "OutOfFlowPositioned", "BidiControl"};
@@ skipping 99 matching lines @@
     unsigned start,
     unsigned end) const {
   DCHECK_GE(start, StartOffset());
   DCHECK_LE(start, end);
   DCHECK_LE(end, EndOffset());
 
   // TODO(kojii): Implement |start| and |end|.
   shape_result_->FallbackFonts(fallback_fonts);
 }
 
+bool NGInlineItem::HasStartEdge() const {
+  DCHECK(Type() == kOpenTag || Type() == kCloseTag);
+  // TODO(kojii): Should use break token when NG has its own tree building.
+  return !GetLayoutObject()->IsInlineElementContinuation();
+}
+
+bool NGInlineItem::HasEndEdge() const {
+  DCHECK(Type() == kOpenTag || Type() == kCloseTag);
+  // TODO(kojii): Should use break token when NG has its own tree building.
+  return !ToLayoutInline(GetLayoutObject())->Continuation();
+}
+
 NGInlineItemRange::NGInlineItemRange(Vector<NGInlineItem>* items,
                                      unsigned start_index,
                                      unsigned end_index)
     : start_item_(&(*items)[start_index]),
       size_(end_index - start_index),
       start_index_(start_index) {
   CHECK_LE(start_index, end_index);
   CHECK_LE(end_index, items->size());
 }
 
 }  // namespace blink