Parse each GPX file in an archive separately

[rails.git] / lib / gpx.rb

diff --git a/lib/gpx.rb b/lib/gpx.rb
index f3e0c0e26c0bddce6d50931fbd5627d333cecd05..068b8481563dad0ae568a00d294eefb88cc71fda 100644 (file)
--- a/lib/gpx.rb
+++ b/lib/gpx.rb
@@ -12,17 +12,7 @@ module GPX
       @file = file
     end
 
-    def points
-      return enum_for(:points) unless block_given?
-
-      @possible_points = 0
-      @actual_points = 0
-      @tracksegs = 0
-
-      @file.rewind
-
-      reader = XML::Reader.io(@file)
-
+    def parse_file(reader)
       point = nil
 
       while reader.read
@@ -47,6 +37,29 @@ module GPX
       end
     end
 
+    def points(&block)
+      return enum_for(:points) unless block_given?
+
+      @possible_points = 0
+      @actual_points = 0
+      @tracksegs = 0
+
+      begin
+        Archive::Reader.open_filename(@file).each_entry_with_data do |_entry, data|
+          parse_file(XML::Reader.string(data), &block)
+        end
+      rescue Archive::Error
+        io = ::File.open(@file)
+
+        case MimeMagic.by_magic(io).type
+        when "application/gzip" then io = Zlib::GzipReader.open(@file)
+        when "application/x-bzip" then io = Bzip2::FFI::Reader.open(@file)
+        end
+
+        parse_file(XML::Reader.io(io), &block)
+      end
+    end
+
     def picture(min_lat, min_lon, max_lat, max_lon, num_points)
       nframes = 10
       width = 250
@@ -100,16 +113,15 @@ module GPX
         end
       end
 
-      res = GD2::AnimatedGif.gif_anim_begin(frames[0])
-      res << GD2::AnimatedGif.gif_anim_add(frames[0], nil, delay)
-      (1...nframes).each do |n|
-        res << GD2::AnimatedGif.gif_anim_add(frames[n],
-                                             (frames[n] == frames[n - 1] ? nil : frames[n - 1]),
-                                             delay)
+      image = GD2::AnimatedGif.new
+      frames.each do |frame|
+        image.add(frame, :delay => delay)
       end
-      res << GD2::AnimatedGif.gif_anim_end
+      image.end
 
-      res
+      output = StringIO.new
+      image.export(output)
+      output.read
     end
 
     def icon(min_lat, min_lon, max_lat, max_lon)