Add UI for RuntimeErrors in the ErrorConsole

extensions/browser/file_highlighter.h

Index: extensions/browser/file_highlighter.h
diff --git a/extensions/browser/manifest_highlighter.h b/extensions/browser/file_highlighter.h
similarity index 61%
rename from extensions/browser/manifest_highlighter.h
rename to extensions/browser/file_highlighter.h
index bb20fef7d835fea2aad8f16c242c6724dee9fb50..c4beaf3be15f28de946e0adc0d1f4e7c7bc54239 100644
--- a/extensions/browser/manifest_highlighter.h
+++ b/extensions/browser/file_highlighter.h
@@ -2,18 +2,61 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef EXTENSIONS_BROWSER_MANIFEST_HIGHLIGHTER_H_
-#define EXTENSIONS_BROWSER_MANIFEST_HIGHLIGHTER_H_
+#ifndef EXTENSIONS_BROWSER_FILE_HIGHLIGHTER_H_
+#define EXTENSIONS_BROWSER_FILE_HIGHLIGHTER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 
+namespace base {
+class DictionaryValue;
+}
+
 namespace extensions {
 
-// Use the ManifestHighlighter class to find the bounds of a feature in the
-// manifest. The manifest is parsed for the feature upon construction of the
+// The FileHighlighter class is used in order to isolate and highlight a portion
+// of a given file (in string form). The Highlighter will split the source into
+// three portions: the portion before the highlighted feature, the highlighted
+// feature, and the portion following the highlighted feature.
+// The file will be parsed for highlighting upon construction of the Highlighter
 // object.
+class FileHighlighter {
+ public:
+  virtual ~FileHighlighter();
+
+  // Get the portion of the manifest which should not be highlighted and is
+  // before the feature.
+  std::string GetBeforeFeature() const;
+
+  // Get the feature portion of the manifest, which should be highlighted.
+  std::string GetFeature() const;
+
+  // Get the portion of the manifest which should not be highlighted and is
+  // after the feature.
+  std::string GetAfterFeature() const;
+
+  // Populate a DictionaryValue with the highlighted portions (in UTF16) of the
+  // source file.
+  void SetHighlightedRegions(base::DictionaryValue* dict) const;
+
+ protected:
+  FileHighlighter(const std::string& contents);
+
+  // The contents of the file we are parsing.
+  std::string contents_;
+
+  // The start of the feature.
+  size_t start_;
+
+  // The end of the feature.
+  size_t end_;
+
+  DISALLOW_COPY_AND_ASSIGN(FileHighlighter);
+};
+
+// Use the ManifestHighlighter class to find the bounds of a feature in the
+// manifest.
 // A feature can be at any level in the hierarchy. The "start" of a feature is
 // the first character of the feature name, or the beginning quote of the name,
 // if present. The "end" of a feature is wherever the next item at the same
@@ -25,23 +68,12 @@ namespace extensions {
 // manifest, and once we parse it into Values, we lose any formatting the user
 // may have had.
 // If a feature cannot be found, the feature will have zero-length.
-class ManifestHighlighter {
+class ManifestHighlighter : public FileHighlighter {
  public:
   ManifestHighlighter(const std::string& manifest,
                       const std::string& key,
                       const std::string& specific /* optional */);
-  ~ManifestHighlighter();
-
-  // Get the portion of the manifest which should not be highlighted and is
-  // before the feature.
-  std::string GetBeforeFeature() const;
-
-  // Get the feature portion of the manifest, which should be highlighted.
-  std::string GetFeature() const;
-
-  // Get the portion of the manifest which should not be highlighted and is
-  // after the feature.
-  std::string GetAfterFeature() const;
+  virtual ~ManifestHighlighter();
 
  private:
   // Called from the constructor; determine the start and end bounds of a
@@ -57,18 +89,24 @@ class ManifestHighlighter {
   // Finds the end of the feature.
   void FindBoundsEnd(const std::string& feature, size_t local_start);
 
-  // The manifest we are parsing.
-  std::string manifest_;
+  DISALLOW_COPY_AND_ASSIGN(ManifestHighlighter);
+};
 
-  // The start of the feature.
-  size_t start_;
+// Use the SourceHighlighter to highlight a particular line in a given source
+// file.
+class SourceHighlighter : public FileHighlighter {
+ public:
+  SourceHighlighter(const std::string& source, size_t line_number);
+  virtual ~SourceHighlighter();
 
-  // The end of the feature.
-  size_t end_;
+ private:
+  // Called from the constructor; determine the bounds of the line in the source
+  // file.
+  void Parse(size_t line_number);
 
-  DISALLOW_COPY_AND_ASSIGN(ManifestHighlighter);
+  DISALLOW_COPY_AND_ASSIGN(SourceHighlighter);
 };
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_BROWSER_MANIFEST_HIGHLIGHTER_H_
+#endif  // EXTENSIONS_BROWSER_FILE_HIGHLIGHTER_H_