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-rw-r--r--layout/base/RestyleLogging.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/layout/base/RestyleLogging.h b/layout/base/RestyleLogging.h
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+++ b/layout/base/RestyleLogging.h
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+/* -*- 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/. */
+
+/**
+ * Macros used to log restyle events.
+ */
+
+#ifndef mozilla_RestyleLogging_h
+#define mozilla_RestyleLogging_h
+
+#include "mozilla/AutoRestore.h"
+
+#ifdef DEBUG
+#define RESTYLE_LOGGING
+#endif
+
+#ifdef RESTYLE_LOGGING
+#define LOG_RESTYLE_VAR2(prefix_, suffix_) prefix_##suffix_
+#define LOG_RESTYLE_VAR(prefix_, suffix_) LOG_RESTYLE_VAR2(prefix_, suffix_)
+#define LOG_RESTYLE_DEPTH LOG_RESTYLE_VAR(restyle_depth_, __LINE__)
+#define LOG_RESTYLE_IF(object_, cond_, message_, ...) \
+ PR_BEGIN_MACRO \
+ if (object_->ShouldLogRestyle() && (cond_)) { \
+ nsCString line; \
+ for (int32_t LOG_RESTYLE_VAR(rs_depth_, __LINE__) = 0; \
+ LOG_RESTYLE_VAR(rs_depth_, __LINE__) < object_->LoggingDepth(); \
+ LOG_RESTYLE_VAR(rs_depth_, __LINE__)++) { \
+ line.AppendLiteral(" "); \
+ } \
+ line.AppendPrintf(message_, ##__VA_ARGS__); \
+ printf_stderr("%s\n", line.get()); \
+ } \
+ PR_END_MACRO
+#define LOG_RESTYLE(message_, ...) \
+ LOG_RESTYLE_IF(this, true, message_, ##__VA_ARGS__)
+// Beware that LOG_RESTYLE_INDENT is two statements not wrapped in a block.
+#define LOG_RESTYLE_INDENT() \
+ AutoRestore<int32_t> LOG_RESTYLE_VAR(ar_depth_, __LINE__)(LoggingDepth()); \
+ ++LoggingDepth();
+#else
+#define LOG_RESTYLE_IF(cond_, message_, ...) /* nothing */
+#define LOG_RESTYLE(message_, ...) /* nothing */
+#define LOG_RESTYLE_INDENT() /* nothing */
+#endif
+
+#endif /* mozilla_RestyleLogging_h */