exports

attentive.gemspec

@@ -33,5 +33,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'thor'
   gem.add_dependency 'backbone-rails'
   gem.add_dependency 'rack', '~> 1.4.0'
+
+  gem.add_dependency 'selenium-webdriver'
 end
 

bin/attentive

@@ -113,6 +113,47 @@ class Attentive::CLI < Thor
     system %{git commit -a -m "Update published site"}
     system %{git checkout master}
   end
+
+  desc 'export', 'Export each slide as a .png file using Selenium'
+  def export
+    puts "Exporting to static HTML..."
+
+    static
+
+    require 'selenium-webdriver'
+
+    browser = Selenium::WebDriver.for(:firefox)
+
+    browser.navigate.to "file://#{Dir.pwd}/_site/index.html"
+
+    browser.execute_script('window.resizeTo(1024, 768)')
+
+    get_current_slide = lambda { ((browser.execute_script('return document.location.href') || '')[%r{#(\d+)$}, 1] || -1).to_i }
+
+    FileUtils.rm_rf '_export'
+    FileUtils.mkdir_p '_export'
+
+    while (current_slide = get_current_slide.call) == -1
+      sleep 0.1
+    end
+
+    while true do
+      browser.save_screenshot("_export/#{current_slide}.png")
+
+      browser.find_element(:css, 'body').click
+
+      sleep 1
+
+      next_slide = get_current_slide.call
+
+      break if next_slide == current_slide
+
+      current_slide = next_slide
+    end
+  ensure
+    browser.close if browser
+  end
 end
 
 Attentive::CLI.start
+

lib/assets/javascripts/attentive/presentation.js.coffee

@@ -34,8 +34,9 @@ class Attentive.Presentation
   start: ->
     @timer.render()
 
-    document.addEventListener('click', @handleClick, false)
     document.addEventListener('keydown', @handleKeyDown, false)
+    document.addEventListener('mousedown', @handleMouseDown, false)
+    document.addEventListener('mouseup', @handleMouseUp, false)
     window.addEventListener('resize', _.throttle(@calculate, 500), false)
 
     imageWait = null
@@ -59,8 +60,18 @@ class Attentive.Presentation
   handlePopState: (e) =>
     this.advanceTo(this.slideFromLocation())
 
-  handleClick: (e) =>
+  handleMouseDown: (e) =>
-    this.advance() if e.target.tagName != 'A'
+    @startSwipeX = e.x
+
+  handleMouseUp: (e) =>
+    distance = @startSwipeX - e.x
+    if Math.abs(distance) > 10
+      if distance < 0
+        this.advance(-1)
+      else
+        this.advance(1)
+    else
+      this.advance() if e.target.tagName != 'A'
 
   handleKeyDown: (e) =>
     switch e.keyCode

lib/attentive.rb

@@ -2,6 +2,7 @@ require "attentive/version"
 
 module Attentive
   autoload :Server, 'attentive/server'
+  autoload :Export, 'attentive/export'
 
   class << self
     attr_accessor :title, :has_presentation, :use_pygments_command_line

lib/attentive/server.rb

@@ -7,6 +7,7 @@ require 'sinatra'
 require 'nokogiri'
 require 'rdiscount'
 require 'sinatra/base'
+require 'pygments'
 
 require 'rack/builder'
 
@@ -30,13 +31,12 @@ module Attentive
       @sprockets_env ||= Sprockets::EnvironmentWithVendoredGems.new
     end
 
-    def self.start(options)
+    def self.start(options, &block)
       require 'rack'
       require 'coffee_script'
       require 'sass'
 
       require 'tilt/coffee'
-      require 'pygments'
 
       if !Attentive.use_pygments_command_line?
         # make sure pygments is ready before starting a new thread
@@ -44,6 +44,8 @@ module Attentive
       end
 
       Rack::Handler.default.run(Attentive::Server, :Port => options[:port]) do |server|
+        block.call(server) if block
+
         trap(:INT) do
           server.shutdown if server.respond_to?(:server)
           server.stop if server.respond_to?(:stop)