lib/tasks/silk_icons.rake in silk_icons-1.1.1 vs lib/tasks/silk_icons.rake in silk_icons-1.2.0

@@ -1,47 +1,96 @@
 require 'silk_icons/info'
 require 'pathname'
 require 'tmpdir'
 
 namespace :silk_icons do
-  docs_dir = Pathname('doc/silk_icons').expand_path
-  images_dir = Pathname('vendor/assets/images/silk_icons').expand_path
+  docs_dir = Pathname('doc/silk_icons')
+  images_dir = Pathname('vendor/assets/images/silk_icons')
+  sprite_image = images_dir + 'sprite.png'
   stylesheets_dir = Pathname('vendor/assets/stylesheets')
+  stylesheet = stylesheets_dir + 'silk_icons.css.scss'
 
   directory "#{docs_dir}"
   directory "#{images_dir}"
   directory "#{stylesheets_dir}"
 
+  task sprite: "#{sprite_image}"
+  task stylesheet: "#{stylesheet}"
+
   task :dev_only do
     unless Pathname('silk_icons.gemspec').exist?
       puts 'This task is for the development of silk_icons gem itself.'
       exit
     end
   end
-  desc 'Unpack the archive and place files in appropriate locations'
-  task unpack: [ :dev_only, "#{docs_dir}", "#{images_dir}" ] do
 
-    basename = File.basename(SilkIcons::ARCHIVE_URL.path)
-    Dir.mktmpdir do |dir|
-      Dir.chdir dir do
-       sh 'curl -O %s' % SilkIcons::ARCHIVE_URL
-       sh 'unzip -q %s' % basename
-       %w(readme.html readme.txt).each do |file|
-         file = Pathname(file)
-         mv file, docs_dir + file.basename
-       end
-       Dir['icons/*'].each do |icon|
-         icon = Pathname(icon)
-         mv icon, images_dir + icon.basename
-       end
+  task fetch: :dev_only do
+    sh 'curl -O %s' % SilkIcons::ARCHIVE_URL
+  end
+
+  desc 'Unpack the archive and place files in appropriate locations.'
+  task unpack: :dev_only do
+    archive_path = Pathname(File.basename(SilkIcons::ARCHIVE_URL.path)).expand_path
+    ENV['SILK_ICONS_TMP'] = dir = Dir.mktmpdir
+    at_exit { rm_r dir }
+    Dir.chdir dir do
+     sh 'unzip -q %s' % archive_path
+    end
+  end
+
+  task docs: [ :unpack, "#{docs_dir}" ] do
+    %w(readme.html readme.txt).each do |file|
+      mv Pathname(ENV['SILK_ICONS_TMP']) + file, docs_dir
+    end
+  end
+
+  file "#{sprite_image}" => [ :unpack, "#{images_dir}" ] do
+    dst = sprite_image.expand_path
+
+    Dir.chdir ENV['SILK_ICONS_TMP'] do
+      pngs = FileList['icons/*.png'].sort
+
+      pnms = pngs.pathmap('%X.pnm')
+      pngs.zip(pnms).each {|png, pnm| sh 'pngtopam %s > %s' % [png, pnm] }
+
+      alpha_pnms = pnms.pathmap('%X-alpha.pnm')
+      pngs.zip(alpha_pnms).each {|png, pnm| sh 'pngtopam --alpha %s > %s' % [png, pnm] }
+
+      row_pnms = pnms.each_slice(40).with_index.map do |row, i|
+        row_pnm = 'row%d.pnm' % i
+        sh 'pnmcat --leftright %s > %s' % [ row.join(' '), row_pnm]
+        row_pnm
       end
+
+      row_alpha_pnms = alpha_pnms.each_slice(40).with_index.map do |row, i|
+        row_alpha_pnm = 'row%d-alpha.pnm' % i
+        sh 'pnmcat --leftright %s > %s' % [ row.join(' '), row_alpha_pnm]
+        row_alpha_pnm
+      end
+
+      sh 'pnmcat --topbottom %s > %s' % [ row_pnms.join(' '), 'sprite.pnm']
+      sh 'pnmcat --topbottom %s > %s' % [ row_alpha_pnms.join(' '), 'sprite-alpha.pnm']
+      sh 'pnmtopng --compress 9 --alpha %s %s > %s' % [ 'sprite-alpha.pnm', 'sprite.pnm', dst ]
     end
   end
 
-  file "#{stylesheets_dir + 'silk_icons.css.scss'}" => [ :dev_only, "#{stylesheets_dir}" ] do |t|
-    icons = FileList["#{images_dir}/*.png"].pathmap('%n')
-    content = icons.map do |icon|
-      ".silk_icon-#{icon} { background: image-url('silk_icons/#{icon}.png') no-repeat; }"
-    end.join("\n")
+  file "#{stylesheet}" => [ :unpack, "#{stylesheets_dir}" ] do |t|
+    content = ''
+    Dir.chdir ENV['SILK_ICONS_TMP'] do
+      pngs = FileList['icons/*.png'].pathmap('%n').sort
+      pngs.each_slice(40).with_index do |row, y|
+        row.each.with_index do |png, x|
+          content += <<-STYLE.lstrip
+          .silk_icon-#{png} {
+            background: image-url('silk_icons/sprite.png') no-repeat -#{x*16}px -#{y*16}px;
+            width: 16px;
+            height: 16px;
+            overflow: hidden;
+          }
+          STYLE
+        end
+      end
+    end
+
     File.write(t.name, content, encoding: 'US-ASCII')
   end
 end