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-rw-r--r--layout/generic/nsFrameState.cpp109
1 files changed, 109 insertions, 0 deletions
diff --git a/layout/generic/nsFrameState.cpp b/layout/generic/nsFrameState.cpp
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+++ b/layout/generic/nsFrameState.cpp
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+/* -*- 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/. */
+
+/* constants for frame state bits and a type to store them in a uint64_t */
+
+#include "nsFrameState.h"
+
+#include "nsBlockFrame.h"
+#include "nsFlexContainerFrame.h"
+#include "nsGridContainerFrame.h"
+#include "nsGfxScrollFrame.h"
+#include "nsIFrame.h"
+#include "nsImageFrame.h"
+#include "nsInlineFrame.h"
+#include "nsPageFrame.h"
+#include "nsPlaceholderFrame.h"
+#include "nsRubyTextFrame.h"
+#include "nsRubyTextContainerFrame.h"
+#include "nsTableCellFrame.h"
+#include "nsTableRowFrame.h"
+#include "nsTableRowGroupFrame.h"
+#include "nsTextFrame.h"
+#include "mozilla/ISVGDisplayableFrame.h"
+#include "mozilla/SVGContainerFrame.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_CLASS(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.InsertLiteral(" | ", 0); \
+ } \
+ result.InsertLiteral(#name_, 0); \
+ state = state & ~NS_FRAME_STATE_BIT(value_); \
+ }
+# include "nsFrameStateBits.h"
+# undef FRAME_STATE_GROUP_CLASS
+# undef FRAME_STATE_BIT
+
+ if (state) {
+ result.AppendPrintf(" | 0x%0" PRIx64, static_cast<uint64_t>(state));
+ }
+
+ return result;
+}
+
+void PrintFrameState(nsIFrame* aFrame) {
+ printf("%s\n", GetFrameState(aFrame).get());
+}
+
+enum class FrameStateGroupId {
+# define FRAME_STATE_GROUP_NAME(name_) name_,
+# include "nsFrameStateBits.h"
+# undef FRAME_STATE_GROUP_NAME
+
+ LENGTH
+};
+
+void DebugVerifyFrameStateBits() {
+ // Build an array of all of the bits used by each group. While
+ // building this we assert that a bit isn't used multiple times within
+ // the same group.
+ nsFrameState bitsUsedPerGroup[size_t(FrameStateGroupId::LENGTH)] = {
+ nsFrameState(0)};
+
+# define FRAME_STATE_BIT(group_, value_, name_) \
+ { \
+ auto bit = NS_FRAME_STATE_BIT(value_); \
+ size_t group = size_t(FrameStateGroupId::group_); \
+ MOZ_ASSERT(!(bitsUsedPerGroup[group] & bit), #name_ \
+ " must not use a bit already declared within its group"); \
+ bitsUsedPerGroup[group] |= bit; \
+ }
+
+# include "nsFrameStateBits.h"
+# undef FRAME_STATE_BIT
+
+ // FIXME: Can we somehow check across the groups as well??? In other
+ // words, find the pairs of groups that could be used on the same
+ // frame (Generic paired with everything else, and a few other pairs),
+ // and check that we don't have bits in common between those pairs.
+}
+
+#endif
+
+} // namespace mozilla