added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 51 insertions, 0 deletions

diff --git a/trunk/lib/rexml/parseexception.rb b/trunk/lib/rexml/parseexception.rb
new file mode 100644
index 0000000000..feb7a7e638
--- /dev/null
+++ b/trunk/lib/rexml/parseexception.rb
@@ -0,0 +1,51 @@
+module REXML
+  class ParseException < RuntimeError
+    attr_accessor :source, :parser, :continued_exception
+
+    def initialize( message, source=nil, parser=nil, exception=nil )
+      super(message)
+      @source = source
+      @parser = parser
+      @continued_exception = exception
+    end
+
+    def to_s
+      # Quote the original exception, if there was one
+      if @continued_exception
+        err = @continued_exception.inspect
+        err << "\n"
+        err << @continued_exception.backtrace.join("\n")
+        err << "\n...\n"
+      else
+        err = ""
+      end
+
+      # Get the stack trace and error message
+      err << super
+
+      # Add contextual information
+      if @source
+        err << "\nLine: #{line}\n"
+        err << "Position: #{position}\n"
+        err << "Last 80 unconsumed characters:\n"
+        err << @source.buffer[0..80].gsub(/\n/, ' ')
+      end
+      
+      err
+    end
+
+    def position
+      @source.current_line[0] if @source and defined? @source.current_line and
+      @source.current_line
+    end
+
+    def line
+      @source.current_line[2] if @source and defined? @source.current_line and 
+      @source.current_line
+    end
+
+    def context
+      @source.current_line
+    end
+  end  
+end