automatic import from ryanb/railscasts-episodes

railscasts · Jul 29, 2011 · fc81247 · fc81247
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diff --git a/README b/README
@@ -0,0 +1,3 @@
+Railscasts Episode #182: Cropping Images
+
+http://railscasts.com/episodes/182
diff --git a/cropper/.gitignore b/cropper/.gitignore
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+tmp/**/*
+log/*.log
+*.sqlite3
+public/system
diff --git a/cropper/README b/cropper/README
@@ -0,0 +1 @@
+Railscasts episode example application.
diff --git a/cropper/Rakefile b/cropper/Rakefile
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+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require(File.join(File.dirname(__FILE__), 'config', 'boot'))
+
+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+require 'tasks/rails'
diff --git a/cropper/app/controllers/application_controller.rb b/cropper/app/controllers/application_controller.rb
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+# Filters added to this controller apply to all controllers in the application.
+# Likewise, all the methods added will be available for all controllers.
+
+class ApplicationController < ActionController::Base
+  helper :all # include all helpers, all the time
+  protect_from_forgery # See ActionController::RequestForgeryProtection for details
+
+  # Scrub sensitive parameters from your log
+  # filter_parameter_logging :password
+end
diff --git a/cropper/app/controllers/users_controller.rb b/cropper/app/controllers/users_controller.rb
@@ -0,0 +1,52 @@
+class UsersController < ApplicationController
+  def index
+    @users = User.all
+  end
+
+  def show
+    @user = User.find(params[:id])
+  end
+
+  def new
+    @user = User.new
+  end
+
+  def create
+    @user = User.new(params[:user])
+    if @user.save
+      if params[:user][:avatar].blank?
+        flash[:notice] = "Successfully created user."
+        redirect_to @user
+      else
+        render :action => "crop"
+      end
+    else
+      render :action => 'new'
+    end
+  end
+
+  def edit
+    @user = User.find(params[:id])
+  end
+
+  def update
+    @user = User.find(params[:id])
+    if @user.update_attributes(params[:user])
+      if params[:user][:avatar].blank?
+        flash[:notice] = "Successfully updated user."
+        redirect_to @user
+      else
+        render :action => "crop"
+      end
+    else
+      render :action => 'edit'
+    end
+  end
+
+  def destroy
+    @user = User.find(params[:id])
+    @user.destroy
+    flash[:notice] = "Successfully destroyed user."
+    redirect_to users_url
+  end
+end
diff --git a/cropper/app/helpers/application_helper.rb b/cropper/app/helpers/application_helper.rb
@@ -0,0 +1,3 @@
+# Methods added to this helper will be available to all templates in the application.
+module ApplicationHelper
+end
diff --git a/cropper/app/helpers/layout_helper.rb b/cropper/app/helpers/layout_helper.rb
@@ -0,0 +1,22 @@
+# These helper methods can be called in your template to set variables to be used in the layout
+# This module should be included in all views globally,
+# to do so you may need to add this line to your ApplicationController
+#   helper :layout
+module LayoutHelper
+  def title(page_title, show_title = true)
+    @content_for_title = page_title.to_s
+    @show_title = show_title
+  end
+
+  def show_title?
+    @show_title
+  end
+
+  def stylesheet(*args)
+    content_for(:head) { stylesheet_link_tag(*args) }
+  end
+
+  def javascript(*args)
+    content_for(:head) { javascript_include_tag(*args) }
+  end
+end
diff --git a/cropper/app/helpers/users_helper.rb b/cropper/app/helpers/users_helper.rb
@@ -0,0 +1,2 @@
+module UsersHelper
+end
diff --git a/cropper/app/models/user.rb b/cropper/app/models/user.rb
@@ -0,0 +1,20 @@
+class User < ActiveRecord::Base
+  has_attached_file :avatar, :styles => { :small => "100x100#", :large => "500x500>" }, :processors => [:cropper]
+  attr_accessor :crop_x, :crop_y, :crop_w, :crop_h
+  after_update :reprocess_avatar, :if => :cropping?
+
+  def cropping?
+    !crop_x.blank? && !crop_y.blank? && !crop_w.blank? && !crop_h.blank?
+  end
+
+  def avatar_geometry(style = :original)
+    @geometry ||= {}
+    @geometry[style] ||= Paperclip::Geometry.from_file(avatar.path(style))
+  end
+
+  private
+
+  def reprocess_avatar
+    avatar.reprocess!
+  end
+end
diff --git a/cropper/app/views/layouts/application.html.erb b/cropper/app/views/layouts/application.html.erb
@@ -0,0 +1,23 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+  <head>
+    <title><%= h(yield(:title) || "Untitled") %></title>
+    <%= stylesheet_link_tag 'application' %>
+    <%= javascript_include_tag 'jquery-1.3.2.min' %>
+    <%= yield(:head) %>
+  </head>
+  <body>
+    <div id="container">
+      <%- flash.each do |name, msg| -%>
+        <%= content_tag :div, msg, :id => "flash_#{name}" %>
+      <%- end -%>
+      
+      <%- if show_title? -%>
+        <h1><%=h yield(:title) %></h1>
+      <%- end -%>
+      
+      <%= yield %>
+    </div>
+  </body>
+</html>
diff --git a/cropper/app/views/users/_form.html.erb b/cropper/app/views/users/_form.html.erb
@@ -0,0 +1,12 @@
+<% form_for @user, :html => { :multipart => true } do |f| %>
+  <%= f.error_messages %>
+  <p>
+    <%= f.label :name %><br />
+    <%= f.text_field :name %>
+  </p>
+  <p>
+    <%= f.label :avatar %><br />
+    <%= f.file_field :avatar %>
+  </p>
+  <p><%= f.submit "Submit" %></p>
+<% end %>
diff --git a/cropper/app/views/users/crop.html.erb b/cropper/app/views/users/crop.html.erb
@@ -0,0 +1,45 @@
+<% title "Crop avatar" %>
+<% content_for(:head) do %>
+<%= stylesheet_link_tag "jquery.Jcrop" %>
+<%= javascript_include_tag "jquery.Jcrop.min" %>
+<script type="text/javascript" charset="utf-8">
+$(function() {
+  $('#cropbox').Jcrop({
+    onChange: update_crop,
+    onSelect: update_crop,
+    setSelect: [0, 0, 500, 500],
+    aspectRatio: 1
+  });
+});
+
+function update_crop(coords) {
+	var rx = 100/coords.w;
+	var ry = 100/coords.h;
+	$('#preview').css({
+		width: Math.round(rx * <%= @user.avatar_geometry(:large).width %>) + 'px',
+		height: Math.round(ry * <%= @user.avatar_geometry(:large).height %>) + 'px',
+		marginLeft: '-' + Math.round(rx * coords.x) + 'px',
+		marginTop: '-' + Math.round(ry * coords.y) + 'px'
+	});
+  var ratio = <%= @user.avatar_geometry(:original).width %> / <%= @user.avatar_geometry(:large).width %>;
+  $("#crop_x").val(Math.round(coords.x * ratio));
+  $("#crop_y").val(Math.round(coords.y * ratio));
+  $("#crop_w").val(Math.round(coords.w * ratio));
+  $("#crop_h").val(Math.round(coords.h * ratio));
+}
+</script>
+<% end %>
+
+<%= image_tag @user.avatar.url(:large), :id => "cropbox" %>
+
+<h4>Preview:</h4>
+<div style="width:100px; height:100px; overflow:hidden">
+  <%= image_tag @user.avatar.url(:large), :id => "preview" %>
+</div>
+
+<% form_for @user do |f| %>
+  <% for attribute in [:crop_x, :crop_y, :crop_w, :crop_h] %>
+    <%= f.hidden_field attribute, :id => attribute %>
+  <% end %>
+  <p><%= f.submit "Crop" %></p>
+<% end %>
diff --git a/cropper/app/views/users/edit.html.erb b/cropper/app/views/users/edit.html.erb
@@ -0,0 +1,8 @@
+<% title "Edit User" %>
+
+<%= render :partial => 'form' %>
+
+<p>
+  <%= link_to "Show", @user %> |
+  <%= link_to "View All", users_path %>
+</p>
diff --git a/cropper/app/views/users/index.html.erb b/cropper/app/views/users/index.html.erb
@@ -0,0 +1,17 @@
+<% title "Users" %>
+
+<table>
+  <tr>
+    <th>Name</th>
+  </tr>
+  <% for user in @users %>
+    <tr>
+      <td><%=h user.name %></td>
+      <td><%= link_to "Show", user %></td>
+      <td><%= link_to "Edit", edit_user_path(user) %></td>
+      <td><%= link_to "Destroy", user, :confirm => 'Are you sure?', :method => :delete %></td>
+    </tr>
+  <% end %>
+</table>
+
+<p><%= link_to "New User", new_user_path %></p>
diff --git a/cropper/app/views/users/new.html.erb b/cropper/app/views/users/new.html.erb
@@ -0,0 +1,5 @@
+<% title "New User" %>
+
+<%= render :partial => 'form' %>
+
+<p><%= link_to "Back to List", users_path %></p>
diff --git a/cropper/app/views/users/show.html.erb b/cropper/app/views/users/show.html.erb
@@ -0,0 +1,14 @@
+<% title "User" %>
+
+<p>
+  <strong>Name:</strong>
+  <%=h @user.name %>
+</p>
+
+<p><%= image_tag @user.avatar.url(:small) %></p>
+
+<p>
+  <%= link_to "Edit", edit_user_path(@user) %> |
+  <%= link_to "Destroy", @user, :confirm => 'Are you sure?', :method => :delete %> |
+  <%= link_to "View All", users_path %>
+</p>
diff --git a/cropper/config/boot.rb b/cropper/config/boot.rb
@@ -0,0 +1,110 @@
+# Don't change this file!
+# Configure your app in config/environment.rb and config/environments/*.rb
+
+RAILS_ROOT = "#{File.dirname(__FILE__)}/.." unless defined?(RAILS_ROOT)
+
+module Rails
+  class << self
+    def boot!
+      unless booted?
+        preinitialize
+        pick_boot.run
+      end
+    end
+
+    def booted?
+      defined? Rails::Initializer
+    end
+
+    def pick_boot
+      (vendor_rails? ? VendorBoot : GemBoot).new
+    end
+
+    def vendor_rails?
+      File.exist?("#{RAILS_ROOT}/vendor/rails")
+    end
+
+    def preinitialize
+      load(preinitializer_path) if File.exist?(preinitializer_path)
+    end
+
+    def preinitializer_path
+      "#{RAILS_ROOT}/config/preinitializer.rb"
+    end
+  end
+
+  class Boot
+    def run
+      load_initializer
+      Rails::Initializer.run(:set_load_path)
+    end
+  end
+
+  class VendorBoot < Boot
+    def load_initializer
+      require "#{RAILS_ROOT}/vendor/rails/railties/lib/initializer"
+      Rails::Initializer.run(:install_gem_spec_stubs)
+      Rails::GemDependency.add_frozen_gem_path
+    end
+  end
+
+  class GemBoot < Boot
+    def load_initializer
+      self.class.load_rubygems
+      load_rails_gem
+      require 'initializer'
+    end
+
+    def load_rails_gem
+      if version = self.class.gem_version
+        gem 'rails', version
+      else
+        gem 'rails'
+      end
+    rescue Gem::LoadError => load_error
+      $stderr.puts %(Missing the Rails #{version} gem. Please `gem install -v=#{version} rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.)
+      exit 1
+    end
+
+    class << self
+      def rubygems_version
+        Gem::RubyGemsVersion rescue nil
+      end
+
+      def gem_version
+        if defined? RAILS_GEM_VERSION
+          RAILS_GEM_VERSION
+        elsif ENV.include?('RAILS_GEM_VERSION')
+          ENV['RAILS_GEM_VERSION']
+        else
+          parse_gem_version(read_environment_rb)
+        end
+      end
+
+      def load_rubygems
+        min_version = '1.3.2'
+        require 'rubygems'
+        unless rubygems_version >= min_version
+          $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.)
+          exit 1
+        end
+
+      rescue LoadError
+        $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org)
+        exit 1
+      end
+
+      def parse_gem_version(text)
+        $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
+      end
+
+      private
+        def read_environment_rb
+          File.read("#{RAILS_ROOT}/config/environment.rb")
+        end
+    end
+  end
+end
+
+# All that for this:
+Rails.boot!