1 files changed, 78 insertions, 0 deletions
diff --git a/layout/generic/nsFrameState.cpp b/layout/generic/nsFrameState.cpp
new file mode 100644
index 000000000..92b8e8324
--- /dev/null
+++ b/layout/generic/nsFrameState.cpp
@@ -0,0 +1,78 @@
+/* -*- 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/. */
+
+/* constants for frame state bits and a type to store them in a uint64_t */
+
+#include "nsFrameState.h"
+
+#include "nsBlockFrame.h"
+#include "nsBoxFrame.h"
+#include "nsBulletFrame.h"
+#include "nsFlexContainerFrame.h"
+#include "nsGridContainerFrame.h"
+#include "nsGfxScrollFrame.h"
+#include "nsIFrame.h"
+#include "nsISVGChildFrame.h"
+#include "nsImageFrame.h"
+#include "nsInlineFrame.h"
+#include "nsPlaceholderFrame.h"
+#include "nsRubyTextFrame.h"
+#include "nsRubyTextContainerFrame.h"
+#include "nsSVGContainerFrame.h"
+#include "nsTableCellFrame.h"
+#include "nsTableRowFrame.h"
+#include "nsTableRowGroupFrame.h"
+#include "nsTextFrame.h"
+
+namespace mozilla {
+
+#ifdef DEBUG
+nsCString
+GetFrameState(nsIFrame* aFrame)
+{
+  nsCString result;
+  AutoTArray<const char*,3> groups;
+
+  nsFrameState state = aFrame->GetStateBits();
+
+  if (state == nsFrameState(0)) {
+    result.Assign('0');
+    return result;
+  }
+
+#define FRAME_STATE_GROUP(name_, class_)                                      \
+  {                                                                           \
+    class_* frame = do_QueryFrame(aFrame);                                    \
+    if (frame && (groups.IsEmpty() || strcmp(groups.LastElement(), #name_))) {\
+      groups.AppendElement(#name_);                                           \
+    }                                                                         \
+  }
+#define FRAME_STATE_BIT(group_, value_, name_)                                \
+  if ((state & NS_FRAME_STATE_BIT(value_)) && groups.Contains(#group_)) {     \
+    if (!result.IsEmpty()) {                                                  \
+      result.Insert(" | ", 0);                                                \
+    }                                                                         \
+    result.Insert(#name_, 0);                                                 \
+    state = state & ~NS_FRAME_STATE_BIT(value_);                              \
+  }
+#include "nsFrameStateBits.h"
+#undef FRAME_STATE_GROUP
+#undef FRAME_STATE_BIT
+
+  if (state) {
+    result.AppendPrintf(" | 0x%0llx", state);
+  }
+
+  return result;
+}
+
+void
+PrintFrameState(nsIFrame* aFrame)
+{
+  printf("%s\n", GetFrameState(aFrame).get());
+}
+#endif
+
+} // namespace mozilla