[LLDB] Added syntax highlighting support

Summary:
This patch adds syntax highlighting support to LLDB. When enabled (and lldb is allowed
to use colors), printed source code is annotated with the ANSI color escape sequences.

So far we have only one highlighter which is based on Clang and is responsible for all
languages that are supported by Clang. It essentially just runs the raw lexer over the input
and then surrounds the specific tokens with the configured escape sequences.

Reviewers: zturner, davide

Reviewed By: davide

Subscribers: labath, teemperor, llvm-commits, mgorny, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D49334

llvm-svn: 338662

3 files changed, 17 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Language/ObjC/CMakeLists.txt b/lldb/source/Plugins/Language/ObjC/CMakeLists.txt
index 95ace3a3633..afb68d4de83 100644
--- a/lldb/source/Plugins/Language/ObjC/CMakeLists.txt
+++ b/lldb/source/Plugins/Language/ObjC/CMakeLists.txt
@@ -31,6 +31,7 @@ add_lldb_library(lldbPluginObjCLanguage PLUGIN
     lldbTarget
     lldbUtility
     lldbPluginAppleObjCRuntime
+    lldbPluginClangCommon
 
   EXTRA_CXXFLAGS ${EXTRA_CXXFLAGS}
 )
diff --git a/lldb/source/Plugins/Language/ObjC/ObjCLanguage.cpp b/lldb/source/Plugins/Language/ObjC/ObjCLanguage.cpp
index 47874b3be8f..d57b999206b 100644
--- a/lldb/source/Plugins/Language/ObjC/ObjCLanguage.cpp
+++ b/lldb/source/Plugins/Language/ObjC/ObjCLanguage.cpp
@@ -1102,3 +1102,12 @@ bool ObjCLanguage::IsNilReference(ValueObject &valobj) {
   bool isZero = valobj.GetValueAsUnsigned(0, &canReadValue) == 0;
   return canReadValue && isZero;
 }
+
+bool ObjCLanguage::IsSourceFile(llvm::StringRef file_path) const {
+  const auto suffixes = {".h", ".m", ".M"};
+  for (auto suffix : suffixes) {
+    if (file_path.endswith_lower(suffix))
+      return true;
+  }
+  return false;
+}
diff --git a/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h b/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h
index 9782c5da0d6..10c30b338cb 100644
--- a/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h
+++ b/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h
@@ -17,6 +17,7 @@
 
 // Other libraries and framework includes
 // Project includes
+#include "Plugins/Language/ClangCommon/ClangHighlighter.h"
 #include "lldb/Target/Language.h"
 #include "lldb/Utility/ConstString.h"
 #include "lldb/lldb-private.h"
@@ -24,6 +25,8 @@
 namespace lldb_private {
 
 class ObjCLanguage : public Language {
+  ClangHighlighter m_highlighter;
+
 public:
   class MethodName {
   public:
@@ -121,6 +124,10 @@ public:
 
   bool IsNilReference(ValueObject &valobj) override;
 
+  bool IsSourceFile(llvm::StringRef file_path) const override;
+
+  const Highlighter *GetHighlighter() const override { return &m_highlighter; }
+
   //------------------------------------------------------------------
   // Static Functions
   //------------------------------------------------------------------