Make a generic preferred color scheme method

[rails.git] / lib / gpx.rb

diff --git a/lib/gpx.rb b/lib/gpx.rb
index 4580421ba533458b63e8fbda2b3d95a9ba452235..45a4dcf5fc0bd62335ea0339409e2c1fbfd49e6d 100644 (file)
--- a/lib/gpx.rb
+++ b/lib/gpx.rb
@@ -4,39 +4,30 @@ module GPX
 
     include LibXML
 
 
     include LibXML
 

-    attr_reader :possible_points
-    attr_reader :actual_points
-    attr_reader :tracksegs
+    attr_reader :possible_points, :actual_points, :tracksegs

 
 

-    def initialize(file)
+    def initialize(file, options = {})

       @file = file
       @file = file

+      @maximum_points = options[:maximum_points] || Float::INFINITY

     end
 
     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
       point = nil
 
       while reader.read

-        if reader.node_type == XML::Reader::TYPE_ELEMENT
+        case reader.node_type
+        when XML::Reader::TYPE_ELEMENT

           if reader.name == "trkpt"
             point = TrkPt.new(@tracksegs, reader["lat"].to_f, reader["lon"].to_f)
             @possible_points += 1
           if reader.name == "trkpt"
             point = TrkPt.new(@tracksegs, reader["lat"].to_f, reader["lon"].to_f)
             @possible_points += 1

+            raise FileTooBigError if @possible_points > @maximum_points

           elsif reader.name == "ele" && point
             point.altitude = reader.read_string.to_f
           elsif reader.name == "time" && point
           elsif reader.name == "ele" && point
             point.altitude = reader.read_string.to_f
           elsif reader.name == "time" && point

-            point.timestamp = Time.parse(reader.read_string)
+            point.timestamp = Time.parse(reader.read_string).utc

           end
           end

-        elsif reader.node_type == XML::Reader::TYPE_END_ELEMENT
-          if reader.name == "trkpt" && point && point.valid?
+        when XML::Reader::TYPE_END_ELEMENT
+          if reader.name == "trkpt" && point&.valid?

             point.altitude ||= 0
             yield point
             @actual_points += 1
             point.altitude ||= 0
             yield point
             @actual_points += 1


@@ -47,13 +38,36 @@ module GPX
       end
     end
 
       end
     end
 

+    def points(&block)
+      return enum_for(:points) unless block
+
+      @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) if entry.regular?
+        end
+      rescue Archive::Error
+        io = ::File.open(@file)
+
+        case Marcel::MimeType.for(io)
+        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, :options => XML::Parser::Options::NOERROR), &block)
+      end
+    end
+

     def picture(min_lat, min_lon, max_lat, max_lon, num_points)
       nframes = 10
       width = 250
       height = 250
       delay = 50
 
     def picture(min_lat, min_lon, max_lat, max_lon, num_points)
       nframes = 10
       width = 250
       height = 250
       delay = 50
 

-      points_per_frame = num_points / nframes
+      points_per_frame = (num_points.to_f / nframes).ceil

 
       proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height)
 
 
       proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height)
 


@@ -100,14 +114,16 @@ module GPX
         end
       end
 
         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 - 1], delay)
+      image = GD2::AnimatedGif.new
+      image.add(frames.first)
+      frames.each do |frame|
+        image.add(frame, :delay => delay)

       end
       end

-      res << GD2::AnimatedGif.gif_anim_end
+      image.end

 
 

-      res
+      output = StringIO.new
+      image.export(output)
+      output

     end
 
     def icon(min_lat, min_lon, max_lat, max_lon)
     end
 
     def icon(min_lat, min_lon, max_lat, max_lon)


@@ -147,7 +163,7 @@ module GPX
         end
       end
 
         end
       end
 

-      image.gif
+      StringIO.new(image.gif)

     end
   end
 
     end
   end
 


@@ -158,4 +174,10 @@ module GPX
         longitude >= -180 && longitude <= 180
     end
   end
         longitude >= -180 && longitude <= 180
     end
   end

+
+  class FileTooBigError < RuntimeError
+    def initialise
+      super("GPX File contains too many points")
+    end
+  end

 end
 end