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Alternative mercury.js for Railscasts#296, based on current version at github
gem 'mercury-rails', git: ''
* Mercury Editor is a CoffeeScript and jQuery based WYSIWYG editor. Documentation and other useful information can be
* found at
* Supported browsers:
* - Firefox 4+
* - Chrome 10+
* - Safari 5+
* Copyright (c) 2011 Jeremy Jackson
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
* Software.
*= require_self
* Minimum jQuery requirements are 1.7
*= require mercury/dependencies/jquery-1.7
* You can include the Rails jQuery ujs script here to get some nicer behaviors in modals, panels and lightviews when
* using :remote => true within the contents rendered in them.
* require jquery_ujs
* If you want to override Mercury functionality, you can do so in a custom file that binds to the mercury:loaded event,
* or do so at the end of the current file (mercury.js). There's an example that will help you get started.
* require mercury_overrides
* Add all requires for the support libraries that integrate nicely with Mercury Editor.
* require mercury/support/history
* Require Mercury Editor itself.
*= require mercury/mercury
* Require any localizations you wish to support
* Example: es.locale, or fr.locale -- regional dialects are in each language file so never en_US for instance.
* require mercury/locales/swedish_chef.locale
* Add all requires for plugins that extend or change the behavior of Mercury Editor.
* require mercury/plugins/save_as_xml/plugin.js
window.Mercury = {
// # Mercury Configuration
config: {
// ## Toolbars
// This is where you can customize the toolbars by adding or removing buttons, or changing them and their
// behaviors. Any top level object put here will create a new toolbar. Buttons are simply nested inside the
// toolbars, along with button groups.
// Some toolbars are custom (the snippetable toolbar for instance), and to denote that use _custom: true. You can
// then build the toolbar yourself with it's own behavior.
// Buttons can be grouped, and a button group is simply a way to wrap buttons for styling -- they can also handle
// enabling or disabling all the buttons within it by using a context. The table button group is a good example
// of this.
// It's important to note that each of the button names (keys), in each toolbar object must be unique, regardless
// of if it's in a button group, or nested, etc. This is because styling is applied to them by name, and because
// their name is used in the event that's fired when you click on them.
// Button format: `[label, description, {type: action, type: action, etc}]`
// ### The available button types are:
// - toggle: toggles on or off when clicked, otherwise behaves like a button
// - modal: opens a modal window, expects the action to be one of:
// 1. a string url
// 2. a function that returns a string url
// - lightview: opens a lightview window (like modal, but different UI), expects the action to be one of:
// 1. a string url
// 2. a function that returns a string url
// - panel: opens a panel dialog, expects the action to be one of:
// 1. a string url
// 2. a function that returns a string url
// - palette: opens a palette window, expects the action to be one of:
// 1. a string url
// 2. a function that returns a string url
// - select: opens a pulldown style window, expects the action to be one of:
// 1. a string url
// 2. a function that returns a string url
// - context: calls a callback function, expects the action to be:
// 1. a function that returns a boolean to highlight the button
// note: if a function isn't provided, the key will be passed to the contextHandler, in which case a default
// context will be used (for more info read the Contexts section below)
// - mode: toggle a given mode in the editor, expects the action to be:
// 1. a string, denoting the name of the mode
// note: it's assumed that when a specific mode is turned on, all other modes will be turned off, which happens
// automatically, thus putting the editor into a specific "state"
// - regions: allows buttons to be enabled/disabled based on what region type has focus, expects the action to be:
// 1. an array of region types (eg. ['editable', 'markupable'])
// - preload: allows some dialog views to be loaded when the button is created instead of on first open, expects:
// 1. a boolean true / false
// note: this is only used by panels, selects, and palettes
// Separators are any "button" that's not an array, and are expected to be a string. You can use two different
// separator styles: line ('-'), and spacer (' ').
// ### Adding Contexts
// Contexts are used callback functions used for highlighting and disabling/enabling buttons and buttongroups. When
// the cursor enters an element within an html region for instance we want to disable or highlight buttons based on
// the properties of the given node. You can see examples of contexts in, and add your own to:
// `Mercury.Toolbar.Button.contexts` and `Mercury.Toolbar.ButtonGroup.contexts`
toolbars: {
primary: {
save: ['Save', 'Save this page'],
preview: ['Preview', 'Preview this page', { toggle: true, mode: true }],
sep1: ' ',
undoredo: {
undo: ['Undo', 'Undo your last action'],
redo: ['Redo', 'Redo your last action'],
sep: ' '
insertLink: ['Link', 'Insert Link', { modal: '/mercury/modals/link.html', regions: ['editable', 'markupable'] }],
insertMedia: ['Media', 'Insert Media (images and videos)', { modal: '/mercury/modals/media.html', regions: ['editable', 'markupable'] }],
insertTable: ['Table', 'Insert Table', { modal: '/mercury/modals/table.html', regions: ['editable', 'markupable'] }],
insertCharacter: ['Character', 'Special Characters', { modal: '/mercury/modals/character.html', regions: ['editable', 'markupable'] }],
snippetPanel: ['Snippet', 'Snippet Panel', { panel: '/mercury/panels/snippets.html' }],
sep2: ' ',
historyPanel: ['History', 'Page Version History', { panel: '/mercury/panels/history.html' }],
sep3: ' ',
notesPanel: ['Notes', 'Page Notes', { panel: '/mercury/panels/notes.html' }]
editable: {
_regions: ['editable', 'markupable'],
predefined: {
style: ['Style', null, { select: '/mercury/selects/style.html', preload: true }],
sep1: ' ',
formatblock: ['Block Format', null, { select: '/mercury/selects/formatblock.html', preload: true }],
sep2: '-'
colors: {
backColor: ['Background Color', null, { palette: '/mercury/palettes/backcolor.html', context: true, preload: true, regions: ['editable'] }],
sep1: ' ',
foreColor: ['Text Color', null, { palette: '/mercury/palettes/forecolor.html', context: true, preload: true, regions: ['editable'] }],
sep2: '-'
decoration: {
bold: ['Bold', null, { context: true }],
italic: ['Italicize', null, { context: true }],
overline: ['Overline', null, { context: true, regions: ['editable'] }],
strikethrough: ['Strikethrough', null, { context: true, regions: ['editable'] }],
underline: ['Underline', null, { context: true, regions: ['editable'] }],
sep: '-'
script: {
subscript: ['Subscript', null, { context: true }],
superscript: ['Superscript', null, { context: true }],
sep: '-'
justify: {
justifyLeft: ['Align Left', null, { context: true, regions: ['editable'] }],
justifyCenter: ['Center', null, { context: true, regions: ['editable'] }],
justifyRight: ['Align Right', null, { context: true, regions: ['editable'] }],
justifyFull: ['Justify Full', null, { context: true, regions: ['editable'] }],
sep: '-'
list: {
insertUnorderedList: ['Unordered List', null, { context: true }],
insertOrderedList: ['Numbered List', null, { context: true }],
sep: '-'
indent: {
outdent: ['Decrease Indentation'],
indent: ['Increase Indentation'],
sep: '-'
table: {
_context: true,
insertRowBefore: ['Insert Table Row', 'Insert a table row before the cursor', { regions: ['editable'] }],
insertRowAfter: ['Insert Table Row', 'Insert a table row after the cursor', { regions: ['editable'] }],
deleteRow: ['Delete Table Row', 'Delete this table row', { regions: ['editable'] }],
insertColumnBefore: ['Insert Table Column', 'Insert a table column before the cursor', { regions: ['editable'] }],
insertColumnAfter: ['Insert Table Column', 'Insert a table column after the cursor', { regions: ['editable'] }],
deleteColumn: ['Delete Table Column', 'Delete this table column', { regions: ['editable'] }],
sep1: ' ',
increaseColspan: ['Increase Cell Columns', 'Increase the cells colspan'],
decreaseColspan: ['Decrease Cell Columns', 'Decrease the cells colspan and add a new cell'],
increaseRowspan: ['Increase Cell Rows', 'Increase the cells rowspan'],
decreaseRowspan: ['Decrease Cell Rows', 'Decrease the cells rowspan and add a new cell'],
sep2: '-'
rules: {
horizontalRule: ['Horizontal Rule', 'Insert a horizontal rule'],
sep1: '-'
formatting: {
removeFormatting: ['Remove Formatting', 'Remove formatting for the selection', { regions: ['editable'] }],
sep2: ' '
editors: {
htmlEditor: ['Edit HTML', 'Edit the HTML content', { regions: ['editable'] }]
snippetable: {
_custom: true,
actions: {
editSnippet: ['Edit Snippet Settings'],
sep1: ' ',
removeSnippet: ['Remove Snippet']
// ## Region Options
// You can customize some aspects of how regions are found, identified, and saved.
// className: Mercury identifies editable regions by a className. This classname has to be added in your HTML in
// advance, and is the only real code/naming exposed in the implementation of Mercury. To allow this to be as
// configurable as possible, you can set the name of the class. When switching to preview mode, this configuration
// is also used to generate a class to indicate that Mercury is in preview mode by appending it with '-preview' (so
// by default it would be mercury-region-preview)
// identifier: This is used as a unique identifier for any given region (and thus should be unique to the page).
// By default this is the id attribute but can be changed to a data attribute should you want to use something
// custom instead.
// dataAttributes: The dataAttributes is an array of data attributes that will be serialized and returned to the
// server upon saving. These attributes, when applied to a Mercury region element, will be automatically serialized
// and submitted with the AJAX request sent when a page is saved. These are expected to be HTML5 data attributes,
// and 'data-' will automatically be prepended to each item in this directive. (ex. ['scope', 'version'])
regions: {
className: 'mercury-region',
identifier: 'id',
dataAttributes: []
// ## Snippet Options / Preview
// When a user drags a snippet onto the page they'll be prompted to enter options for the given snippet. The server
// is expected to respond with a form. Once the user submits this form, an Ajax request is sent to the server with
// the options provided; this preview request is expected to respond with the rendered markup for the snippet.
// method: The HTTP method used when submitting both the options and the preview. We use POST by default because a
// snippet options form may contain large text inputs and we don't want that to be truncated when sent to the
// server.
// optionsUrl: The url that the options form will be loaded from.
// previewUrl: The url that the options will be submitted to, and will return the rendered snippet markup.
// **Note:** `:name` will be replaced with the snippet name in the urls (eg. /mercury/snippets/example/options.html)
snippets: {
method: 'POST',
optionsUrl: '/mercury/snippets/:name/options.html',
previewUrl: '/mercury/snippets/:name/preview.html'
// ## Image Uploading
// If you drag images from your desktop into regions that support it, it will be uploaded to the server and inserted
// into the region. You can disable or enable this feature, the accepted mime-types, file size restrictions, and
// other things related to uploading.
// **Note:** Image uploading is only supported in some region types, and some browsers.
// enabled: You can set this to true, or false if you want to disable the feature entirely.
// allowedMimeTypes: You can restrict the types of files that can be uploaded by providing a list of allowed mime
// types.
// maxFileSize: You can restrict large files by setting the maxFileSize (in bytes).
// inputName: When uploading, a form is generated and submitted to the server via Ajax. If your server would prefer
// a different name for how the image comes through, you can change the inputName.
// url: The url that the image upload will be submitted to.
// handler: You can use false to let Mercury handle it for you, or you can provide a handler function that can
// modify the response from the server. This can be useful if your server doesn't respond the way Mercury expects.
// The handler function should take the response from the server and return an object that matches:
// `{image: {url: '[your provided url]'}`
uploading: {
enabled: true,
allowedMimeTypes: ['image/jpeg', 'image/gif', 'image/png'],
maxFileSize: 1235242880,
inputName: 'image[image]',
url: '/mercury/images',
handler: false
// ## Localization / I18n
// Include the .locale files you want to support when loading Mercury. The files are always named by the language,
// and not the regional dialect (eg. en.locale.js) because the regional dialects are nested within the primary
// locale files.
// The client locale will be used first, and if no proper locale file is found for their language then the fallback
// preferredLocale configuration will be used. If one isn't provided, and the client locale isn't included, the
// strings will remain untranslated.
// enabled: Set to false to disable, true to enable.
// preferredLocale: If a client doesn't support the locales you've included, this is used as a fallback.
localization: {
enabled: false,
preferredLocale: 'swedish_chef-BORK'
// ## Behaviors
// Behaviors are used to change the default behaviors of a given region type when a given button is clicked. For
// example, you may prefer to add HR tags using an HR wrapped within a div with a classname (for styling). You
// can add your own complex behaviors here and they'll be shared across all regions.
// If you want to add behaviors to specific region types, you can mix them into the actions property of any region
// type.
// Mercury.Regions.Editable.actions.htmlEditor = function() {}
// You can see how the behavior matches up directly with the button names. It's also important to note that the
// callback functions are executed within the scope of the given region, so you have access to all it's methods.
behaviors: {
//foreColor: function(selection, options) { selection.wrap('<span style="color:' + options.value.toHex() + '">', true) },
htmlEditor: function() { Mercury.modal('/mercury/modals/htmleditor.html', { title: 'HTML Editor', fullHeight: true, handler: 'htmlEditor' }); }
// ## Global Behaviors
// Global behaviors are much like behaviors, but are more "global". Things like save, exit, etc. can be included
// here. They'll only be called once, and execute within the scope of whatever editor is instantiated (eg.
// PageEditor).
// An example of changing how saving works:
// save: function() {
// var data = top.JSON.stringify(this.serialize(), null, ' ');
// var content = '<textarea style="width:500px;height:200px" wrap="off">' + data + '</textarea>';
// Mercury.modal(null, {title: 'Saving', closeButton: true, content: content})
// }
// This is a nice way to add functionality, when the behaviors aren't region specific. These can be triggered by a
// button, or manually with `Mercury.trigger('action', {action: 'barrelRoll'})`
globalBehaviors: {
exit: function() { window.location.href = this.iframeSrc() },
barrelRoll: function() { $('body').css({webkitTransform: 'rotate(360deg)'}) }
// ## Ajax and CSRF Headers
// Some server frameworks require that you provide a specific header for Ajax requests. The values for these CSRF
// tokens are typically stored in the rendered DOM. By default, Mercury will look for the Rails specific meta tag,
// and provide the X-CSRF-Token header on Ajax requests, but you can modify this configuration if the system you're
// using doesn't follow the same standard.
csrfSelector: 'meta[name="csrf-token"]',
csrfHeader: 'X-CSRF-Token',
// ## Hijacking Links & Forms
// Mercury will hijack links and forms that don't have a target set, or the target is set to _self and will set it
// to _parent. This is because the target must be set properly for Mercury to not get in the way of some
// functionality, like proper page loads on form submissions etc. Mercury doesn't do this to links or forms that
// are within editable regions because it doesn't want to impact the html that's saved. With that being explained,
// you can add classes to links or forms that you don't want this behavior added to. Let's say you have links that
// open a lightbox style window, and you don't want the targets of these to be set to _parent. You can add classes
// to this array, and they will be ignored when the hijacking is applied.
nonHijackableClasses: [],
// ## Pasting & Sanitizing
// When pasting content into Mercury it may sometimes contain HTML tags and attributes. This markup is used to
// style the content and makes the pasted content look (and behave) the same as the original content. This can be a
// desired feature or an annoyance, so you can enable various sanitizing methods to clean the content when it's
// pasted.
// sanitize: Can be any of the following:
// - false: no sanitizing is done, the content is pasted the exact same as it was copied by the user
// - 'whitelist': content is cleaned using the settings specified in the tag white list (described below)
// - 'text': all html is stripped before pasting, leaving only the raw text
// whitelist: The white list allows you to specify tags and attributes that are allowed when pasting content. Each
// item in this object should contain the allowed tag, and an array of attributes that are allowed on that tag. If
// the allowed attributes array is empty, all attributes will be removed. If a tag is not present in this list, it
// will be removed, but without removing any of the text or tags inside it.
// **Note:** Content is *always* sanitized if looks like it's from MS Word or similar editors regardless of this
// configuration.
pasting: {
sanitize: 'whitelist',
whitelist: {
h1: [],
h2: [],
h3: [],
h4: [],
h5: [],
h6: [],
table: [],
thead: [],
tbody: [],
tfoot: [],
tr: [],
th: ['colspan', 'rowspan'],
td: ['colspan', 'rowspan'],
div: ['class'],
span: ['class'],
ul: [],
ol: [],
li: [],
b: [],
strong: [],
i: [],
em: [],
u: [],
strike: [],
br: [],
p: [],
hr: [],
a: ['href', 'target', 'title', 'name'],
img: ['src', 'title', 'alt']
// ## Injected Styles
// Mercury tries to stay as much out of your code as possible, but because regions appear within your document we
// need to include a few styles to indicate regions, as well as the different states of them (eg. focused). These
// styles are injected into your document, and as simple as they might be, you may want to change them.
// {{regionClass}} will be automatically replaced with whatever you have set in the regions.class config directive.
injectedStyles: '' +
'.{{regionClass}} { min-height: 10px; outline: 1px dotted #09F } ' +
'.{{regionClass}}:focus, .{{regionClass}}.focus { outline: none; -webkit-box-shadow: 0 0 10px #09F, 0 0 1px #045; box-shadow: 0 0 10px #09F, 0 0 1px #045 }' +
'.{{regionClass}}:after { content: "."; display: block; visibility: hidden; clear: both; height: 0; overflow: hidden; }' +
'.{{regionClass}} table, .{{regionClass}} td, .{{regionClass}} th { border: 1px dotted red; min-width: 6px; }' +
'.mercury-textarea { border: 0; box-sizing: border-box; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; resize: none; }' +
'.mercury-textarea:focus { outline: none; }'
// ## Silent Mode
// Turning silent mode on will disable asking about unsaved changes before leaving the page.
silent: false,
// ## Debug Mode
// Turning debug mode on will log events and other various things (using console.debug if available).
debug: false,
// The onload method is provided as a callback in case you want to override default Mercury Editor behavior. It will
// be called directly after the Mercury scripts have loaded, but before anything has been initialized. It's a good
// place to add or change functionality.
onload: function() {
//Mercury.PageEditor.prototype.iframeSrc = function(url) { return '/testing'; }
Mercury.on('ready', function() {
var link = $('#mercury_iframe').contents().find('#edit_link');
Mercury.saveURL ='save-url');
Mercury.on('saved', function() {
window.location.href = window.location.href.replace(/\/editor\//i, '/');
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