Created
April 22, 2015 15:59
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WYSIWYG content previews for Ruby on Rails
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| <% form_for(@blog_post) do |f| %> | |
| <%= link_to 'Preview', '#', data: {preview: true, model: @blog_post.class.to_s} %> | |
| <%= f.text_area :body %> | |
| <%= f.submit %> | |
| <% end %> |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <%= render partial: "layouts/partials/head" %> | |
| </head> | |
| <body> | |
| <%= yield %> | |
| <%= form_tag("/preview", style: "display: none;" id: "serialized-preview-form") do %> | |
| <input name="model" /> | |
| <textarea name="body"></textarea> | |
| <% end %> | |
| <script> | |
| // Accepts the data and submits the serialized data | |
| function setData(model, data) { | |
| var form = $('#serialized-preview-form'); | |
| form.find("[name=body]").val(data); | |
| form.find("[name=model]").val(model); | |
| form.submit(); | |
| } | |
| window.opener.ContentPreview.previewAreaReady(); | |
| </script> | |
| </body> | |
| </html> |
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| var ContentPreview = { | |
| firstLoad: true, | |
| previewWindow: null, | |
| previewTimer: null, | |
| previewDebounce: null, | |
| form: null, | |
| model: null, | |
| init: function() { | |
| var self = this; | |
| $('[data-preview]').on("click", function(e) { | |
| e.preventDefault(); | |
| var link = $(this); | |
| form = link.parents("form"); | |
| form.on("keyup", function() { | |
| clearTimeout(self.previewDebounce); | |
| self.previewDebounce = setTimeout(function() { | |
| self.previewBody(); | |
| }, 1000); | |
| }); | |
| self.model = link.data('model'); | |
| self.firstLoad = true; | |
| self.previewWindow = window.open("/preview", "Preview", "_blank", "height=600,width=690"); | |
| }); | |
| }, | |
| // When the preview window is ready it will call this function | |
| previewAreaReady: function() { | |
| var self = this; | |
| if(!self.firstLoad) { return; } | |
| self.firstLoad = false; | |
| self.previewBody(); | |
| }, | |
| previewBody: function() { | |
| var self = this; | |
| if(!self.previewArea) { return } | |
| clearTimeout(self.previewTimer); | |
| self.previewTimer = setTimeout(function() { | |
| var data = $(form).serialize(); | |
| self.previewWindow.setData("/preview", self.model, data); | |
| }, 150); | |
| } | |
| } |
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| class PreviewController < ApplicationController | |
| def show | |
| model_class = params[:model].constantize | |
| lower = model_class.to_s.underscore | |
| if params[:body] | |
| values = HashWithIndifferentAccess.new(Rack::Utils.parse_nested_query(params[:body])) | |
| values = ActionController::Parameters.new(values) | |
| if values[:id] | |
| model = model_class.find(values[:id]) | |
| model.attributes = values.require(lower).permit! | |
| else | |
| model = model_class.new(values.require(lower).permit!) | |
| end | |
| else | |
| model = model_class.new | |
| end | |
| instance_variable_set("@" + lower, model) | |
| @preview = true | |
| @template = "/preview/templates/#{lower}.html.erb" | |
| response.headers['X-XSS-Protection'] = "0" | |
| render layout: "preview" | |
| end | |
| end |
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