[llvm-cov] Add the project summary to each source file coverage report.

This patch includes the following changes:
- Included header "Code coverage report" and include the date that the report was created.
- Included title (as specified in a command line option, (i.e llvm-cov  -project-title="Simple Test")
- In the summary, list the elf files that the source code file has contributed to.
- Used column heading for "Line No.", "Count No.", Source".

Differential Revision: https://reviews.llvm.org/D23345

llvm-svn: 279628

llvm/tools/llvm-cov/SourceCoverageView.h

@@ -172,6 +172,9 @@ class SourceCoverageView {
   /// on display.
   std::vector<InstantiationView> InstantiationSubViews;
 
+  /// Specifies whether or not the view is a function view.
+  bool FunctionView;
+
 protected:
   struct LineRef {
     StringRef Line;
@@ -192,7 +195,7 @@ protected:
   virtual void renderViewFooter(raw_ostream &OS) = 0;
 
   /// \brief Render the source name for the view.
-  virtual void renderSourceName(raw_ostream &OS) = 0;
+  virtual void renderSourceName(raw_ostream &OS, bool WholeFile) = 0;
 
   /// \brief Render the line prefix at the given \p ViewDepth.
   virtual void renderLinePrefix(raw_ostream &OS, unsigned ViewDepth) = 0;
@@ -236,6 +239,13 @@ protected:
   virtual void renderInstantiationView(raw_ostream &OS, InstantiationView &ISV,
                                        unsigned ViewDepth) = 0;
 
+  /// \brief Render the project title, the report title \p CellText and the
+  /// created time for the view.
+  virtual void renderCellInTitle(raw_ostream &OS, StringRef CellText) = 0;
+
+  /// \brief Render the table header for a given source file
+  virtual void renderTableHeader(raw_ostream &OS, unsigned IndentLevel = 0) = 0;
+
   /// @}
 
   /// \brief Format a count using engineering notation with 3 significant
@@ -250,20 +260,22 @@ protected:
 
   SourceCoverageView(StringRef SourceName, const MemoryBuffer &File,
                      const CoverageViewOptions &Options,
-                     coverage::CoverageData &&CoverageInfo)
+                     coverage::CoverageData &&CoverageInfo, bool FunctionView)
       : SourceName(SourceName), File(File), Options(Options),
-        CoverageInfo(std::move(CoverageInfo)) {}
+        CoverageInfo(std::move(CoverageInfo)), FunctionView(FunctionView) {}
 
 public:
   static std::unique_ptr<SourceCoverageView>
   create(StringRef SourceName, const MemoryBuffer &File,
          const CoverageViewOptions &Options,
-         coverage::CoverageData &&CoverageInfo);
+         coverage::CoverageData &&CoverageInfo, bool FucntionView = false);
 
   virtual ~SourceCoverageView() {}
 
   StringRef getSourceName() const { return SourceName; }
 
+  bool isFunctionView() const { return FunctionView; }
+
   const CoverageViewOptions &getOptions() const { return Options; }
 
   /// \brief Add an expansion subview to this view.