1 files changed, 92 insertions, 0 deletions
diff --git a/layout/base/nsQuoteList.h b/layout/base/nsQuoteList.h
new file mode 100644
index 000000000..4f0a2e3de
--- /dev/null
+++ b/layout/base/nsQuoteList.h
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+/* implementation of quotes for the CSS 'content' property */
+
+#ifndef nsQuoteList_h___
+#define nsQuoteList_h___
+
+#include "mozilla/Attributes.h"
+#include "nsGenConList.h"
+
+struct nsQuoteNode : public nsGenConNode {
+  // open-quote, close-quote, no-open-quote, or no-close-quote
+  const nsStyleContentType mType;
+
+  // Quote depth before this quote, which is always non-negative.
+  int32_t mDepthBefore;
+
+  nsQuoteNode(nsStyleContentType& aType, uint32_t aContentIndex)
+    : nsGenConNode(aContentIndex)
+    , mType(aType)
+    , mDepthBefore(0)
+  {
+    NS_ASSERTION(aType == eStyleContentType_OpenQuote ||
+                 aType == eStyleContentType_CloseQuote ||
+                 aType == eStyleContentType_NoOpenQuote ||
+                 aType == eStyleContentType_NoCloseQuote,
+                 "incorrect type");
+    NS_ASSERTION(aContentIndex <= INT32_MAX, "out of range");
+  }
+
+  virtual bool InitTextFrame(nsGenConList* aList,
+          nsIFrame* aPseudoFrame, nsIFrame* aTextFrame) override;
+
+  // is this 'open-quote' or 'no-open-quote'?
+  bool IsOpenQuote() {
+    return mType == eStyleContentType_OpenQuote ||
+           mType == eStyleContentType_NoOpenQuote;
+  }
+
+  // is this 'close-quote' or 'no-close-quote'?
+  bool IsCloseQuote() {
+    return !IsOpenQuote();
+  }
+
+  // is this 'open-quote' or 'close-quote'?
+  bool IsRealQuote() {
+    return mType == eStyleContentType_OpenQuote ||
+           mType == eStyleContentType_CloseQuote;
+  }
+
+  // Depth of the quote for *this* node.  Either non-negative or -1.
+  // -1 means this is a closing quote that tried to decrement the
+  // counter below zero (which means no quote should be rendered).
+  int32_t Depth() {
+    return IsOpenQuote() ? mDepthBefore : mDepthBefore - 1;
+  }
+
+  // always non-negative
+  int32_t DepthAfter() {
+    return IsOpenQuote() ? mDepthBefore + 1
+                         : (mDepthBefore == 0 ? 0 : mDepthBefore - 1);
+  }
+
+  // The text that should be displayed for this quote.
+  const nsString* Text();
+};
+
+class nsQuoteList : public nsGenConList {
+private:
+  nsQuoteNode* FirstNode() { return static_cast<nsQuoteNode*>(mList.getFirst()); }
+public:
+  // assign the correct |mDepthBefore| value to a node that has been inserted
+  // Should be called immediately after calling |Insert|.
+  void Calc(nsQuoteNode* aNode);
+
+  nsQuoteNode* Next(nsQuoteNode* aNode) {
+    return static_cast<nsQuoteNode*>(nsGenConList::Next(aNode));
+  }
+  nsQuoteNode* Prev(nsQuoteNode* aNode) {
+    return static_cast<nsQuoteNode*>(nsGenConList::Prev(aNode));
+  }
+
+  void RecalcAll();
+#ifdef DEBUG
+  void PrintChain();
+#endif
+};
+
+#endif /* nsQuoteList_h___ */