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gecko/layout/base/RestyleLogging.h

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Bug 979133 - Add facility to log the restyle process. r=dbaron Set the MOZ_DEBUG_RESTYLE environment variable and every restyle will have detailed logging printed to stderr. By default, restyles for animations are not logged; you can include them by also setting MOZ_DEBUG_RESTYLE_ANIMATIONS. If you wish to limit restyle logging to a particular change, you can call nsPresContext::StartRestyleLogging() and nsPresContext::StopRestyleLogging() at appropriate points. (You might want to add a couple of helper methods temporarily on nsIDocument and then expose them to your page with Web IDL to make them easier to call.) You do not need to have set MOZ_DEBUG_RESTYLE for this to work.
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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
Bug 1073828 - Fix variable generation in RestyleLogging.h. r=dbaron
2014-09-28 02:19:26 -07:00
#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__)
Bug 979133 - Add facility to log the restyle process. r=dbaron Set the MOZ_DEBUG_RESTYLE environment variable and every restyle will have detailed logging printed to stderr. By default, restyles for animations are not logged; you can include them by also setting MOZ_DEBUG_RESTYLE_ANIMATIONS. If you wish to limit restyle logging to a particular change, you can call nsPresContext::StartRestyleLogging() and nsPresContext::StopRestyleLogging() at appropriate points. (You might want to add a couple of helper methods temporarily on nsIDocument and then expose them to your page with Web IDL to make them easier to call.) You do not need to have set MOZ_DEBUG_RESTYLE for this to work.
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#define LOG_RESTYLE_IF(object_, cond_, message_, ...) \
PR_BEGIN_MACRO \
if (object_->ShouldLogRestyle() && (cond_)) { \
nsCString line; \
Bug 1073828 - Fix variable generation in RestyleLogging.h. r=dbaron
2014-09-28 02:19:26 -07:00
for (int32_t LOG_RESTYLE_VAR(rs_depth_, __LINE__) = 0; \
LOG_RESTYLE_VAR(rs_depth_, __LINE__) < object_->LoggingDepth(); \
LOG_RESTYLE_VAR(rs_depth_, __LINE__)++) { \
Bug 979133 - Add facility to log the restyle process. r=dbaron Set the MOZ_DEBUG_RESTYLE environment variable and every restyle will have detailed logging printed to stderr. By default, restyles for animations are not logged; you can include them by also setting MOZ_DEBUG_RESTYLE_ANIMATIONS. If you wish to limit restyle logging to a particular change, you can call nsPresContext::StartRestyleLogging() and nsPresContext::StopRestyleLogging() at appropriate points. (You might want to add a couple of helper methods temporarily on nsIDocument and then expose them to your page with Web IDL to make them easier to call.) You do not need to have set MOZ_DEBUG_RESTYLE for this to work.
2014-09-24 22:45:36 -07:00
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() \
Bug 1073828 - Fix variable generation in RestyleLogging.h. r=dbaron
2014-09-28 02:19:26 -07:00
AutoRestore<int32_t> LOG_RESTYLE_VAR(ar_depth_, __LINE__)(LoggingDepth()); \
Bug 979133 - Add facility to log the restyle process. r=dbaron Set the MOZ_DEBUG_RESTYLE environment variable and every restyle will have detailed logging printed to stderr. By default, restyles for animations are not logged; you can include them by also setting MOZ_DEBUG_RESTYLE_ANIMATIONS. If you wish to limit restyle logging to a particular change, you can call nsPresContext::StartRestyleLogging() and nsPresContext::StopRestyleLogging() at appropriate points. (You might want to add a couple of helper methods temporarily on nsIDocument and then expose them to your page with Web IDL to make them easier to call.) You do not need to have set MOZ_DEBUG_RESTYLE for this to work.
2014-09-24 22:45:36 -07:00
++LoggingDepth();
#else
#define LOG_RESTYLE_IF(cond_, message_, ...) /* nothing */
#define LOG_RESTYLE(message_, ...) /* nothing */
#define LOG_RESTYLE_INDENT() /* nothing */
#endif
#endif /* mozilla_RestyleLogging_h */
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