Implemented markdown footnotes

2013-06-23 00:48:57 +01:00 · 2013-06-23 00:48:57 +01:00 · abe18e41bf
commit abe18e41bf
parent 56f1c3d8c4
56 changed files with 538 additions and 347 deletions
--- a/css/default.css
+++ b/css/default.css
@ -419,6 +419,13 @@ div.dropdown-menu textarea {
 	margin-top: 10px;
 }

+.footnote {
+	vertical-align: top;
+    position: relative;
+    top: -0.5em;
+    font-size: 0.8em;
+}
+
 .icon-link {
 	background-position: -72px -168px;
 }
@ -642,6 +649,10 @@ div.dropdown-menu textarea {
 	text-align: left;
 }

+.tooltip li {
+	line-height: 1.4;
+}
+
 /* Definition list */
 dt,dd {
 	margin-top: 5px;
--- a/doc/img/architecture.png
+++ b/doc/img/architecture.png
--- a/js/classes/Extension.js
+++ b/js/classes/Extension.js
@ -0,0 +1,10 @@
+define(function() {
+    
+    function Extension(extensionId, extensionName, isOptional) {
+        this.extensionId = extensionId;
+        this.extensionName = extensionName;
+        this.isOptional = isOptional;
+    }
+    
+    return Extension;
+});
--- a/js/classes/Provider.js
+++ b/js/classes/Provider.js
@ -0,0 +1,9 @@
+define(function() {
+    
+    function Provider(providerId, providerName) {
+        this.providerId = providerId;
+        this.providerName = providerName;
+    }
+    
+    return Provider;
+});
--- a/js/core.js
+++ b/js/core.js
@ -461,6 +461,28 @@ define([
            }
        });

+        // Reset inputs
+        $(".action-reset-input").click(function() {
+            utils.resetModalInputs();
+        });
+
+        // Do periodic tasks
+        intervalId = window.setInterval(function() {
+            utils.updateCurrentTime();
+            checkWindowUnique();
+            if(isUserActive() === true || viewerMode === true) {
+                _.each(periodicCallbacks, function(callback) {
+                    callback();
+                });
+                checkOnline();
+            }
+        }, 1000);
+    });
+    core.onReady(extensionMgr.onReady);
+    
+    // After extensions onReady callbacks
+    core.onReady(function() {
+
        // Tooltips
        $(".tooltip-lazy-rendering").tooltip({
            container: '#modal-settings',
@ -490,24 +512,7 @@ define([
            e.stopPropagation();
        });

-        // Reset inputs
-        $(".action-reset-input").click(function() {
-            utils.resetModalInputs();
    });

-        // Do periodic tasks
-        intervalId = window.setInterval(function() {
-            utils.updateCurrentTime();
-            checkWindowUnique();
-            if(isUserActive() === true || viewerMode === true) {
-                _.each(periodicCallbacks, function(callback) {
-                    callback();
-                });
-                checkOnline();
-            }
-        }, 1000);
-    });
-    core.onReady(extensionMgr.onReady);
-
    return core;
 });
--- a/js/extensionMgr.js
+++ b/js/extensionMgr.js
@ -2,6 +2,7 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "settings",
    "text!html/settingsExtensionsAccordion.html",
    "extensions/googleAnalytics",
@ -20,20 +21,21 @@ define([
    "extensions/documentTitle",
    "extensions/workingIndicator",
    "extensions/notifications",
-    "extensions/markdown-extra",
+    "extensions/markdownExtra",
+    "extensions/markdownFootnotes",
    "extensions/toc",
    "extensions/mathJax",
    "extensions/emailConverter",
    "extensions/scrollLink",
    "libs/bootstrap",
    "libs/jquery.waitforimages"
-], function($, _, utils, settings, settingsExtensionsAccordionHTML) {
+], function($, _, utils, Extension, settings, settingsExtensionsAccordionHTML) {

    var extensionMgr = {};

    // Create a list of extensions
    var extensionList = _.chain(arguments).map(function(argument) {
-        return _.isObject(argument) && argument.extensionId && argument;
+        return argument instanceof Extension && argument;
    }).compact().value();

    // Return every named callbacks implemented in extensions
@ -66,7 +68,7 @@ define([
    extensionSettings = settings.extensionSettings || {};
    _.each(extensionList, function(extension) {
        extension.config = _.extend({}, extension.defaultConfig, extensionSettings[extension.extensionId]);
-        extension.config.enabled = !extension.optional || extension.config.enabled === undefined || extension.config.enabled === true;
+        extension.config.enabled = !extension.isOptional || extension.config.enabled === undefined || extension.config.enabled === true;
    });

    // Load/Save extension config from/to settings
@ -152,8 +154,8 @@ define([
        $("#accordion-extensions").append($(_.template(settingsExtensionsAccordionHTML, {
            extensionId: extension.extensionId,
            extensionName: extension.extensionName,
-            optional: extension.optional,
-            settingsBloc: extension.settingsBloc
+            isOptional: extension.isOptional,
+            settingsBlock: extension.settingsBlock
        })));
    }

--- a/js/extensions/buttonHtmlCode.js
+++ b/js/extensions/buttonHtmlCode.js
@ -1,21 +1,48 @@
 define([
    "jquery",
+    "underscore",
+    "utils",
+    "classes/Extension",
    "text!html/buttonHtmlCode.html",
-], function($, buttonHtmlCodeHTML) {
+    "text!html/buttonHtmlCodeSettingsBlock.html",
+], function($, _, utils, Extension, buttonHtmlCodeHTML, buttonHtmlCodeSettingsBlockHTML) {

-    var buttonHtmlCode = {
-        extensionId: "buttonHtmlCode",
-        extensionName: 'Button "HTML code"',
-        optional: true,
-        settingsBloc: '<p>Adds a "HTML code" button over the preview.</p>'
+    var buttonHtmlCode = new Extension("buttonHtmlCode", 'Button "HTML code"', true);
+    buttonHtmlCode.settingsBlock = buttonHtmlCodeSettingsBlockHTML;
+    buttonHtmlCode.defaultConfig = {
+        template: "<%= documentHTML %>",
+    };
+    
+    buttonHtmlCode.onLoadSettings = function() {
+        utils.setInputValue("#textarea-html-code-template", buttonHtmlCode.config.template);
+    };
+
+    buttonHtmlCode.onSaveSettings = function(newConfig, event) {
+        newConfig.template = utils.getInputValue("#textarea-html-code-template");
    };

    buttonHtmlCode.onCreatePreviewButton = function() {
        return $(buttonHtmlCodeHTML);
    };

+    var selectedFileDesc = undefined;
+    buttonHtmlCode.onFileSelected = function(fileDesc) {
+        selectedFileDesc = fileDesc;
+    };
+
    buttonHtmlCode.onPreviewFinished = function() {
-        $("#input-html-code").val($("#wmd-preview").html());
+        try {
+            var htmlCode = _.template(buttonHtmlCode.config.template, {
+                documentTitle: selectedFileDesc.title,
+                documentMarkdown: selectedFileDesc.content,
+                documentHTML: $("#wmd-preview").html()
+            });
+            $("#input-html-code").val(htmlCode);
+        }
+        catch(e) {
+            extensionMgr.onError(e);
+            return e.message;
+        }
    };

    buttonHtmlCode.onReady = function() {
--- a/js/extensions/buttonMarkdownSyntax.js
+++ b/js/extensions/buttonMarkdownSyntax.js
@ -1,14 +1,11 @@
 define([
    "jquery",
+    "classes/Extension",
    "text!html/buttonMarkdownSyntax.html",
-], function($, buttonMarkdownSyntaxHTML) {
+], function($, Extension, buttonMarkdownSyntaxHTML) {

-    var buttonMarkdownSyntax = {
-        extensionId: "buttonMarkdownSyntax",
-        extensionName: 'Button "Markdown syntax"',
-        optional: true,
-        settingsBloc: '<p>Adds a "Markdown syntax" button over the preview.</p>'
-    };
+    var buttonMarkdownSyntax = new Extension("buttonMarkdownSyntax", 'Button "Markdown syntax', true);
+    buttonMarkdownSyntax.settingsBlock = '<p>Adds a "Markdown syntax" button over the preview.</p>';

    buttonMarkdownSyntax.onCreatePreviewButton = function() {
        return $(buttonMarkdownSyntaxHTML);
--- a/js/extensions/buttonPublish.js
+++ b/js/extensions/buttonPublish.js
@ -1,14 +1,12 @@
 define([
    "jquery",
    "underscore",
+    "classes/Extension",
    "text!html/buttonPublish.html",
-], function($, _, buttonPublishHTML) {
+], function($, _, Extension, buttonPublishHTML) {

-    var buttonPublish = {
-        extensionId: "buttonPublish",
-        extensionName: 'Button "Publish"',
-        settingsBloc: '<p>Adds a "Publish document" button in the navigation bar.</p>'
-    };
+    var buttonPublish = new Extension("buttonPublish", 'Button "Publish"');
+    buttonPublish.settingsBlock = '<p>Adds a "Publish document" button in the navigation bar.</p>';

    var button = undefined;
    var currentFileDesc = undefined;
--- a/js/extensions/buttonShare.js
+++ b/js/extensions/buttonShare.js
@ -1,16 +1,13 @@
 define([
    "jquery",
    "underscore",
+    "classes/Extension",
    "text!html/buttonShare.html",
    "text!html/buttonShareLocation.html",
-], function($, _, buttonShareHTML, buttonShareLocationHTML) {
+], function($, _, Extension, buttonShareHTML, buttonShareLocationHTML) {

-    var buttonShare = {
-        extensionId: "buttonShare",
-        extensionName: 'Button "Share"',
-        optional: true,
-        settingsBloc: '<p>Adds a "Share document" button in the navigation bar.</p>'
-    };
+    var buttonShare = new Extension("buttonShare", 'Button "Share"', true);
+    buttonShare.settingsBlock = '<p>Adds a "Share document" button in the navigation bar.</p>';

    buttonShare.onCreateButton = function() {
        return $(buttonShareHTML);
--- a/js/extensions/buttonStat.js
+++ b/js/extensions/buttonStat.js
@ -2,23 +2,20 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "text!html/buttonStat.html",
-    "text!html/buttonStatSettingsBloc.html",
-], function($, _, utils, buttonStatHTML, buttonStatSettingsBlocHTML) {
+    "text!html/buttonStatSettingsBlock.html",
+], function($, _, utils, Extension, buttonStatHTML, buttonStatSettingsBlockHTML) {

-    var buttonStat = {
-        extensionId: "buttonStat",
-        extensionName: 'Button "Statistics"',
-        optional: true,
-        defaultConfig: {
+    var buttonStat = new Extension("buttonStat", 'Button "Statistics"', true);
+    buttonStat.settingsBlock = buttonStatSettingsBlockHTML;
+    buttonStat.defaultConfig = {
        name1: "Characters",
        value1: "\\S",
        name2: "Words",
        value2: "\\S+",
        name3: "Paragraphs",
        value3: "\\S.*",
-        },
-        settingsBloc: buttonStatSettingsBlocHTML
    };

    buttonStat.onLoadSettings = function() {
--- a/js/extensions/buttonSync.js
+++ b/js/extensions/buttonSync.js
@ -2,17 +2,15 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "text!html/buttonSync.html",
-    "text!html/buttonSyncSettingsBloc.html",
-], function($, _, utils, buttonSyncHTML, buttonSyncSettingsBlocHTML) {
+    "text!html/buttonSyncSettingsBlock.html",
+], function($, _, utils, Extension, buttonSyncHTML, buttonSyncSettingsBlockHTML) {

-    var buttonSync = {
-        extensionId: "buttonSync",
-        extensionName: 'Button "Synchronize"',
-        defaultConfig: {
+    var buttonSync = new Extension("buttonSync", 'Button "Synchronize"');
+    buttonSync.settingsBlock = buttonSyncSettingsBlockHTML;
+    buttonSync.defaultConfig = {
        syncPeriod: 180000
-        },
-        settingsBloc: buttonSyncSettingsBlocHTML
    };

    buttonSync.onLoadSettings = function() {
--- a/js/extensions/buttonViewer.js
+++ b/js/extensions/buttonViewer.js
@ -1,14 +1,11 @@
 define([
    "jquery",
+    "classes/Extension",
    "text!html/buttonViewer.html",
-], function($, buttonViewerHTML) {
+], function($, Extension, buttonViewerHTML) {

-    var buttonViewer = {
-        extensionId: "buttonViewer",
-        extensionName: 'Button "Viewer"',
-        optional: true,
-        settingsBloc: '<p>Adds a "Viewer" button over the preview.</p>'
-    };
+    var buttonViewer = new Extension("buttonViewer", 'Button "Viewer"', true);
+    buttonViewer.settingsBlock = '<p>Adds a "Viewer" button over the preview.</p>';

    buttonViewer.onCreatePreviewButton = function() {
        return $(buttonViewerHTML);
--- a/js/extensions/dialogAbout.js
+++ b/js/extensions/dialogAbout.js
@ -1,14 +1,12 @@
 define([
    "jquery",
    "underscore",
+    "classes/Extension",
    "text!html/dialogAbout.html",
-], function($, _, dialogAboutHTML) {
+], function($, _, Extension, dialogAboutHTML) {

-    var dialogAbout = {
-        extensionId: "dialogAbout",
-        extensionName: 'Dialog "About"',
-        settingsBloc: '<p>Prints the content of the "About" dialog box.</p>'
-    };
+    var dialogAbout = new Extension("dialogAbout", 'Dialog "About"');
+    dialogAbout.settingsBlock = '<p>Prints the content of the "About" dialog box.</p>';

    var libraries = {
        "Bootstrap": "http://twitter.github.io/bootstrap/",
--- a/js/extensions/dialogManagePublication.js
+++ b/js/extensions/dialogManagePublication.js
@ -1,14 +1,12 @@
 define([
    "jquery",
    "underscore",
+    "classes/Extension",
    "text!html/dialogManagePublicationLocation.html",
-], function($, _, dialogManagePublicationLocationHTML) {
+], function($, _, Extension, dialogManagePublicationLocationHTML) {

-    var dialogManagePublication = {
-        extensionId: "dialogManagePublication",
-        extensionName: 'Dialog "Manage publication"',
-        settingsBloc: '<p>Populates the "Manage publication" dialog box.</p>'
-    };
+    var dialogManagePublication = new Extension("dialogManagePublication", 'Dialog "Manage publication"');
+    dialogManagePublication.settingsBlock = '<p>Populates the "Manage publication" dialog box.</p>';

    var extensionMgr = undefined;
    dialogManagePublication.onExtensionMgrCreated = function(extensionMgrParameter) {
--- a/js/extensions/dialogManageSynchronization.js
+++ b/js/extensions/dialogManageSynchronization.js
@ -1,14 +1,12 @@
 define([
    "jquery",
    "underscore",
+    "classes/Extension",
    "text!html/dialogManageSynchronizationLocation.html",
-], function($, _, dialogManageSynchronizationLocationHTML) {
+], function($, _, Extension, dialogManageSynchronizationLocationHTML) {

-    var dialogManageSynchronization = {
-        extensionId: "dialogManageSynchronization",
-        extensionName: 'Dialog "Manage synchronization"',
-        settingsBloc: '<p>Populates the "Manage synchronization" dialog box.</p>'
-    };
+    var dialogManageSynchronization = new Extension("dialogManageSynchronization", 'Dialog "Manage synchronization"');
+    dialogManageSynchronization.settingsBlock = '<p>Populates the "Manage synchronization" dialog box.</p>';

    var extensionMgr = undefined;
    dialogManageSynchronization.onExtensionMgrCreated = function(extensionMgrParameter) {
--- a/js/extensions/dialogOpenHarddrive.js
+++ b/js/extensions/dialogOpenHarddrive.js
@ -2,15 +2,13 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "toMarkdown",
    "config",
-], function($, _, utils, toMarkdown) {
+], function($, _, utils, Extension, toMarkdown) {

-    var dialogOpenHarddrive = {
-        extensionId: "dialogOpenHarddrive",
-        extensionName: 'Dialog "Open from"',
-        settingsBloc: '<p>Handles the "Import from hard drive" and the "Convert HTML to Markdown" dialog boxes.</p>'
-    };
+    var dialogOpenHarddrive = new Extension("dialogOpenHarddrive", 'Dialog "Open from"');
+    dialogOpenHarddrive.settingsBlock = '<p>Handles the "Import from hard drive" and the "Convert HTML to Markdown" dialog boxes.</p>';

    var fileMgr = undefined;
    dialogOpenHarddrive.onFileMgrCreated = function(fileMgrParameter) {
--- a/js/extensions/documentSelector.js
+++ b/js/extensions/documentSelector.js
@ -2,20 +2,18 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "mousetrap",
    "fileSystem",
-    "text!html/documentSelectorSettingsBloc.html",
-], function($, _, utils, mousetrap, fileSystem, documentSelectorSettingsBlocHTML) {
+    "text!html/documentSelectorSettingsBlock.html",
+], function($, _, utils, Extension, mousetrap, fileSystem, documentSelectorSettingsBlockHTML) {

-    var documentSelector = {
-        extensionId: "documentSelector",
-        extensionName: "Document Selector",
-        defaultConfig: {
+    var documentSelector = new Extension("documentSelector", 'Document Selector');
+    documentSelector.settingsBlock = documentSelectorSettingsBlockHTML;
+    documentSelector.defaultConfig = {
        orderBy: "title",
        shortcutPrevious: "Ctrl+[",
        shortcutNext: "Ctrl+]"
-        },
-        settingsBloc: documentSelectorSettingsBlocHTML
    };

    documentSelector.onLoadSettings = function() {
@ -148,7 +146,8 @@ define([
        });

        // Handle key shortcut
-        mousetrap.bind(documentSelector.config.shortcutPrevious.toLowerCase(), function() {
+        var shortcutPrevious = documentSelector.config.shortcutPrevious.toLowerCase();
+        mousetrap.bind(shortcutPrevious, function() {
            if(shortcutLi === undefined) {
                $("#file-selector").parent().is(".open") || $(".action-open-file").click();
                shortcutLi = liMap[selectFileDesc.fileIndex];
@ -163,6 +162,7 @@ define([
            });
            return false;
        });
+        var shortcutNext = documentSelector.config.shortcutNext.toLowerCase();
        mousetrap.bind(documentSelector.config.shortcutNext.toLowerCase(), function() {
            if(shortcutLi === undefined) {
                $("#file-selector").parent().is(".open") || $(".action-open-file").click();
@ -175,7 +175,14 @@ define([
            });
            return false;
        });
-        mousetrap.bind('ctrl', function() {
+        var delimiter1 = shortcutPrevious.indexOf("+");
+        var shortcutSelect1 = delimiter1 === -1 ? shortcutPrevious : shortcutPrevious.substring(0, delimiter1);
+        var delimiter2 = shortcutNext.indexOf("+");
+        var shortcutSelect2 = delimiter2 === -1 ? shortcutNext : shortcutNext.substring(0, delimiter2);
+        mousetrap.bind([
+            shortcutSelect1,
+            shortcutSelect2
+        ], function() {
            if(shortcutLi !== undefined) {
                shortcutLi.find("a").click();
                shortcutLi = undefined;
--- a/js/extensions/documentTitle.js
+++ b/js/extensions/documentTitle.js
@ -1,13 +1,11 @@
 define([
    "jquery",
-    "underscore"
-], function($, _) {
+    "underscore",
+    "classes/Extension",
+], function($, _, Extension) {

-    var documentTitle = {
-        extensionId: "documentTitle",
-        extensionName: "Document Title",
-        settingsBloc: '<p>Responsible for showing the document title in the navigation bar.</p>'
-    };
+    var documentTitle = new Extension("documentTitle", "Document Title");
+    documentTitle.settingsBlock = '<p>Responsible for showing the document title in the navigation bar.</p>';

    var layout = undefined;
    documentTitle.onLayoutCreated = function(layoutParameter) {
--- a/js/extensions/emailConverter.js
+++ b/js/extensions/emailConverter.js
@ -1,11 +1,9 @@
-define(function() {
+define([
+    "classes/Extension",
+], function(Extension) {

-    var emailConverter = {
-        extensionId: "emailConverter",
-        extensionName: "Email Converter",
-        optional: true,
-        settingsBloc: '<p>Converts email adresses in the form &lt;email@example.com&gt; into clickable links.</p>'
-    };
+    var emailConverter = new Extension("emailConverter", "Markdown Email", true);
+    emailConverter.settingsBlock = '<p>Converts email adresses in the form &lt;email@example.com&gt; into clickable links.</p>';

    emailConverter.onEditorConfigure = function(editor) {
        editor.getConverter().hooks.chain("postConversion", function(text) {
--- a/js/extensions/googleAnalytics.js
+++ b/js/extensions/googleAnalytics.js
@ -2,16 +2,13 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "settings",
    "config",
-], function($, _, utils, settings) {
+], function($, _, utils, Extension, settings) {

-    var googleAnalytics = {
-        extensionId: "googleAnalytics",
-        extensionName: 'Google Analytics',
-        optional: true,
-        settingsBloc: '<p>Sends anonymous statistics about usage and errors to help improve StackEdit.</p>'
-    };
+    var googleAnalytics = new Extension("googleAnalytics", "Google Analytics", true);
+    googleAnalytics.settingsBlock = '<p>Sends anonymous statistics about usage and errors to help improve StackEdit.</p>';

    var isLoaded = false;
    var isOffline = false;
--- a/js/extensions/markdown-extra.js
+++ b/js/extensions/markdown-extra.js
@ -1,17 +1,14 @@
 define([
    "utils",
-    "text!html/markdownExtraSettingsBloc.html",
+    "classes/Extension",
+    "text!html/markdownExtraSettingsBlock.html",
    "libs/Markdown.Extra",
-], function(utils, markdownExtraSettingsBlocHTML) {
+], function(utils, Extension, markdownExtraSettingsBlockHTML) {

-    var markdownExtra = {
-        extensionId: "markdownExtra",
-        extensionName: "Markdown Extra",
-        optional: true,
-        defaultConfig: {
+    var markdownExtra = new Extension("markdownExtra", "Markdown Extra", true);
+    markdownExtra.settingsBlock = markdownExtraSettingsBlockHTML;
+    markdownExtra.defaultConfig = {
        prettify: true
-        },
-        settingsBloc: markdownExtraSettingsBlocHTML
    };

    markdownExtra.onLoadSettings = function() {
--- a/js/extensions/markdownFootnotes.js
+++ b/js/extensions/markdownFootnotes.js
@ -0,0 +1,100 @@
+define([
+    "underscore",
+    "utils",
+    "classes/Extension",
+], function(_, utils, Extension) {
+
+    var markdownFootnotes = new Extension("markdownFootnotes", "Markdown Footnotes", true);
+    markdownFootnotes.settingsBlock = '<p>Adds support for Markdown footnotes.</p>';
+
+    var inlineTags = new RegExp([
+        '^(<\\/?(a|abbr|acronym|applet|area|b|basefont|',
+        'bdo|big|button|cite|code|del|dfn|em|figcaption|',
+        'font|i|iframe|img|input|ins|kbd|label|map|',
+        'mark|meter|object|param|progress|q|ruby|rp|rt|s|',
+        'samp|script|select|small|span|strike|strong|',
+        'sub|sup|textarea|time|tt|u|var|wbr)[^>]*>|',
+        '<(br)\\s?\\/?>)$'
+    ].join(''), 'i');
+
+    var previousPostConversion = undefined;
+    markdownFootnotes.onEditorConfigure = function(editor) {
+        var converter = editor.getConverter();
+        previousPostConversion = converter.hooks.postConversion;
+        converter.hooks.chain("postNormalization", _StripFootnoteDefinitions);
+        converter.hooks.chain("postBlockGamut", _DoFootnotes);
+        converter.hooks.chain("postConversion", _PrintFootnotes);
+    };
+
+    var footnotes = undefined;
+    var usedFootnotes = undefined;
+    function _StripFootnoteDefinitions(text) {
+        footnotes = {};
+        usedFootnotes = [];
+
+        text = text.replace(/\n[ ]{0,3}\[\^(.+?)\]\:[ \t]*\n?(.*?)\n{1,2}((?=\n[ ]{0,3}\S)|\Z)/g, function(wholeMatch, m1, m2) {
+            m1 = utils.slugify(m1);
+            m2 += "\n";
+            m2 = m2.replace(/^[ ]{0,3}/gm, "");
+            footnotes[m1] = m2;
+            return "\n";
+        });
+
+        return text;
+    }
+
+    var blockGamutHookCallback = undefined;
+    function _DoFootnotes(text, blockGamutHookCallbackParam) {
+        blockGamutHookCallback = blockGamutHookCallbackParam;
+        var footnoteCounter = 0;
+        text = text.replace(/\[\^(.+?)\]/g, function(wholeMatch, m1) {
+            var id = utils.slugify(m1);
+            var footnote = footnotes[id];
+            if(footnote === undefined) {
+                return "";
+            }
+            footnoteCounter++;
+            usedFootnotes.push(id);
+            return '<a href="#fn:' + id + '" id="fnref:' + id + '" title="See footnote" class="footnote">' + footnoteCounter + '</a>';
+        });
+
+        return text;
+    }
+
+    function _PrintFootnotes(text) {
+        if(usedFootnotes.length === 0) {
+            return text;
+        }
+
+        _.each(footnotes, function(footnote, id) {
+            var formattedfootnote = blockGamutHookCallback(footnote);
+            formattedfootnote = unescapeSpecialChars(formattedfootnote);
+            formattedfootnote = formattedfootnote.replace(/~D/g, "$$").replace(/~T/g, "~");
+            formattedfootnote = previousPostConversion(formattedfootnote);
+            formattedfootnote = formattedfootnote.replace(/<[^>]*>?/gi, function(tag) {
+                return tag.match(inlineTags) ? tag : '';
+            });
+            footnotes[id] = formattedfootnote;
+        });
+
+        text += '\n\n<div class="footnotes">\n<hr>\n<ol>\n\n';
+        _.each(usedFootnotes, function(id) {
+            var footnote = footnotes[id];
+            text += '<li id="fn:' + id + '">' + footnote + ' <a href="#fnref:' + id + '" title="Return to article" class="reversefootnote">&#8617;</a></li>\n\n';
+        });
+        text += '</ol>\n</div>';
+        return text;
+    }
+
+    // Duplicated from PageDown converter
+    function unescapeSpecialChars(text) {
+        // Swap back in all the special characters we've hidden.
+        text = text.replace(/~E(\d+)E/g, function(wholeMatch, m1) {
+            var charCodeToReplace = parseInt(m1);
+            return String.fromCharCode(charCodeToReplace);
+        });
+        return text;
+    }
+
+    return markdownFootnotes;
+});
--- a/js/extensions/mathJax.js
+++ b/js/extensions/mathJax.js
@ -1,19 +1,62 @@
 define([
-    "libs/MathJax"
-], function() {
+    "utils",
+    "classes/Extension",
+    "text!html/mathJaxSettingsBlock.html",
+    "libs/MathJax",
+], function(utils, Extension, mathJaxSettingsBlockHTML) {
 	
-	var mathJax = {
-		extensionId: "mathJax",
-		extensionName: "MathJax",
-        optional: true,
-		settingsBloc: '<p>Allows StackEdit to interpret LaTex mathematical expressions.</p>'
+	var mathJax = new Extension("mathJax", "MathJax", true);
+	mathJax.settingsBlock = mathJaxSettingsBlockHTML;
+    mathJax.defaultConfig = {
+        tex: "{}",
+        tex2jax: '{ inlineMath: [["$","$"],["\\\\(","\\\\)"]], displayMath: [["$$","$$"],["\\[","\\]"]], processEscapes: true }'
+    };
+
+    mathJax.onLoadSettings = function() {
+        utils.setInputValue("#input-mathjax-config-tex", mathJax.config.tex);
+        utils.setInputValue("#input-mathjax-config-tex2jax", mathJax.config.tex2jax);
+    };
+
+    mathJax.onSaveSettings = function(newConfig, event) {
+        newConfig.tex = utils.getInputJsValue("#input-mathjax-config-tex", event);
+        newConfig.tex2jax = utils.getInputJsValue("#input-mathjax-config-tex2jax", event);
    };
 	
    mathJax.onReady = function() {
-		MathJax.Hub.Config({"HTML-CSS": {preferredFont: "TeX",availableFonts: ["STIX", "TeX"],linebreaks: {automatic: true},EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50), imageFont: null},
-		    tex2jax: {inlineMath: [["$", "$"], ["\\\\(", "\\\\)"]],displayMath: [["$$", "$$"], ["\\[", "\\]"]],processEscapes: true,ignoreClass: "tex2jax_ignore|dno"},
-		    TeX: {noUndefined: {attributes: {mathcolor: "red",mathbackground: "#FFEEEE",mathsize: "90%"}},
-		        Safe: {allow: {URLs: "safe",classes: "safe",cssIDs: "safe",styles: "safe",fontsize: "all"}}},
+        eval("var tex = " + mathJax.config.tex);
+        eval("var tex2jax = " + mathJax.config.tex2jax);
+        MathJax.Hub.Config({
+            "HTML-CSS": {
+                preferredFont: "TeX",
+                availableFonts: [
+                    "STIX",
+                    "TeX"
+                ],
+                linebreaks: {
+                    automatic: true
+                },
+                EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50),
+                imageFont: null
+            },
+            tex2jax: tex2jax,
+            TeX: $.extend({
+                noUndefined: {
+                    attributes: {
+                        mathcolor: "red",
+                        mathbackground: "#FFEEEE",
+                        mathsize: "90%"
+                    }
+                },
+                Safe: {
+                    allow: {
+                        URLs: "safe",
+                        classes: "safe",
+                        cssIDs: "safe",
+                        styles: "safe",
+                        fontsize: "all"
+                    }
+                }
+            }, tex),
            messageStyle: "none"
        });
    };
--- a/js/extensions/notifications.js
+++ b/js/extensions/notifications.js
@ -2,17 +2,15 @@ define([
    "jquery",
    "underscore",
    "utils",
+    "classes/Extension",
    "jgrowl",
-    "text!html/notificationsSettingsBloc.html",
-], function($, _, utils, jGrowl, notificationsSettingsBlocHTML) {
+    "text!html/notificationsSettingsBlock.html",
+], function($, _, utils, Extension, jGrowl, notificationsSettingsBlockHTML) {

-    var notifications = {
-        extensionId: "notifications",
-        extensionName: "Notifications",
-        defaultConfig: {
+    var notifications = new Extension("notifications", "Notifications");
+    notifications.settingsBlock = notificationsSettingsBlockHTML;
+    notifications.defaultConfig = {
        timeout: 8000
-        },
-        settingsBloc: notificationsSettingsBlocHTML
    };

    notifications.onLoadSettings = function() {
--- a/js/extensions/scrollLink.js
+++ b/js/extensions/scrollLink.js
@ -1,17 +1,14 @@
 define([
    "jquery",
    "underscore",
-    "text!html/scrollLinkSettingsBloc.html",
+    "classes/Extension",
+    "text!html/scrollLinkSettingsBlock.html",
    "libs/css_browser_selector",
    "libs/jquery.mousewheel"
-], function($, _, scrollLinkSettingsBlocHTML) {
+], function($, _, Extension, scrollLinkSettingsBlockHTML) {

-    var scrollLink = {
-        extensionId: "scrollLink",
-        extensionName: "Scroll Link",
-        optional: true,
-        settingsBloc: scrollLinkSettingsBlocHTML
-    };
+    var scrollLink = new Extension("scrollLink", "Scroll Link", true);
+    scrollLink.settingsBlock = scrollLinkSettingsBlockHTML;

    var mdSectionList = [];
    var htmlSectionList = [];
--- a/js/extensions/toc.js
+++ b/js/extensions/toc.js
@ -2,17 +2,14 @@ define([
    "jquery",
    "underscore",
    "utils",
-    "text!html/tocSettingsBloc.html",
-], function($, _, utils, tocSettingsBlocHTML) {
+    "classes/Extension",
+    "text!html/tocSettingsBlock.html",
+], function($, _, utils, Extension, tocSettingsBlockHTML) {

-    var toc = {
-        extensionId: "toc",
-        extensionName: "Table of Content",
-        optional: true,
-        defaultConfig: {
+    var toc = new Extension("toc", "Markdown Table of Content", true);
+    toc.settingsBlock = tocSettingsBlockHTML;
+    toc.defaultConfig = {
        marker: "\\[(TOC|toc)\\]"
-        },
-        settingsBloc: tocSettingsBlocHTML
    };

    toc.onLoadSettings = function() {
@ -21,7 +18,7 @@ define([

    toc.onSaveSettings = function(newConfig, event) {
        newConfig.marker = utils.getInputRegExpValue("#input-toc-marker", event);
-};
+    };

    // TOC element description
    function TocElement(tagName, anchor, text) {
--- a/js/extensions/workingIndicator.js
+++ b/js/extensions/workingIndicator.js
@ -1,13 +1,11 @@
 define([
    "jquery",
-    "underscore"
-], function($, _) {
+    "underscore",
+    "classes/Extension",
+], function($, _, Extension) {

-    var workingIndicator = {
-        extensionId: "workingIndicator",
-        extensionName: "Working Indicator",
-        settingsBloc: '<p>Displays an animated image when a network operation is running.</p>'
-    };
+    var workingIndicator = new Extension("workingIndicator", "Working Indicator");
+    workingIndicator.settingsBlock = '<p>Displays an animated image when a network operation is running.</p>';

    workingIndicator.onAsyncRunning = function(isRunning) {
        if(isRunning === false) {
--- a/js/helpers/sshHelper.js
+++ b/js/helpers/sshHelper.js
@ -1,8 +1,9 @@
 define([
    "jquery",
    "core",
+    "settings",
    "classes/AsyncTask"
-], function($, core, AsyncTask) {
+], function($, core, settings, AsyncTask) {

    var sshHelper = {};

@ -21,7 +22,7 @@ define([
        var task = new AsyncTask();
        connect(task);
        task.onRun(function() {
-            var url = SSH_PROXY_URL + "upload";
+            var url = settings.sshProxy + "upload";
            var data = {
                host: host,
                port: port,
--- a/js/html/buttonHtmlCodeSettingsBlock.html
+++ b/js/html/buttonHtmlCodeSettingsBlock.html
@ -0,0 +1,11 @@
+<p>Adds a "HTML code" button over the preview.</p>
+<div class="form-horizontal">
+	<div class="control-group">
+		<label class="control-label" for="textarea-html-code-template">Template
+			<a href="#" class="tooltip-template">(?)</a>
+		</label>
+		<div class="controls">
+			<textarea id="textarea-html-code-template"></textarea>
+		</div>
+	</div>
+</div>
--- a/js/html/buttonStatSettingsBlock.html
+++ b/js/html/buttonStatSettingsBlock.html
--- a/js/html/buttonSyncSettingsBlock.html
+++ b/js/html/buttonSyncSettingsBlock.html
--- a/js/html/documentSelectorSettingsBlock.html
+++ b/js/html/documentSelectorSettingsBlock.html
--- a/js/html/markdownExtraSettingsBlock.html
+++ b/js/html/markdownExtraSettingsBlock.html
@ -8,3 +8,4 @@
 		</div>
 	</div>
 </div>
+<span class="help-block pull-right"><a target="_blank" href="https://github.com/jmcmanus/pagedown-extra">More info</a></span>
--- a/js/html/mathJaxSettingsBlock.html
+++ b/js/html/mathJaxSettingsBlock.html
@ -0,0 +1,18 @@
+<p>Allows StackEdit to interpret LaTeX mathematical expressions.</p>
+<div class="form-horizontal">
+    <div class="control-group">
+        <label class="control-label"
+            for="input-mathjax-config-tex">TeX configuration</label>
+        <div class="controls">
+            <input type="text" id="input-mathjax-config-tex">
+        </div>
+    </div>
+    <div class="control-group">
+        <label class="control-label"
+            for="input-mathjax-config-tex2jax">tex2jax configuration</label>
+        <div class="controls">
+            <input type="text" id="input-mathjax-config-tex2jax">
+        </div>
+    </div>
+</div>
+<span class="help-block pull-right"><a target="_blank" href="http://docs.mathjax.org/en/latest/options/">More info</a></span>
--- a/js/html/notificationsSettingsBlock.html
+++ b/js/html/notificationsSettingsBlock.html
--- a/js/html/scrollLinkSettingsBlock.html
+++ b/js/html/scrollLinkSettingsBlock.html
--- a/js/html/settingsExtensionsAccordion.html
+++ b/js/html/settingsExtensionsAccordion.html
@ -2,12 +2,12 @@
 	<div class="accordion-heading">
 		<label class="checkbox pull-right"> <input
 			id="input-enable-extension-<%= extensionId %>" type="checkbox"<%
-			if(!optional) print('disabled') %>> enabled
+			if(!isOptional) print('disabled') %>> enabled
 		</label> <a data-toggle="collapse"
 			data-parent="#accordion-extensions" class="accordion-toggle"
 			href="#collapse-<%= extensionId %>"> <%= extensionName %> </a>
 	</div>
 	<div id="collapse-<%= extensionId %>" class="accordion-body collapse">
-		<div class="accordion-inner"><%= settingsBloc %></div>
+		<div class="accordion-inner"><%= settingsBlock %></div>
 	</div>
 </div>
--- a/js/html/settingsTemplateTooltip.html
+++ b/js/html/settingsTemplateTooltip.html
@ -5,7 +5,7 @@ Available variables:
 	<li><b>documentMarkdown</b>: document in Markdown format</li>
 	<li><b>documentHTML</b>: document in HTML format</li>
 	<li><b>publishAttributes</b>: attributes of the publish location
-		(undefined when using "Save")</li>
+		(undefined if not publishing)</li>
 </ul>
 Examples:
 <br />
@ -13,8 +13,10 @@ Examples:
 <br />
 &lt;div&gt;&lt;%- documentHTML %&gt;&lt;&#x2F;div&gt;
 <br />
-&lt;% if(publishAttributes.provider == &quot;github&quot;)
-print(documentMarkdown); %&gt;
+&lt;%<br />
+if(publishAttributes.provider.providerId == &quot;github&quot;)
+print(documentMarkdown);<br />
+%&gt;
 <br />
 <br />
 <a target="_blank" href="http://underscorejs.org/#template">More
--- a/js/html/tocSettingsBlock.html
+++ b/js/html/tocSettingsBlock.html
--- a/js/mediaImporter.js
+++ b/js/mediaImporter.js
@ -1,15 +1,16 @@
 define([
    "jquery",
    "underscore",
+    "classes/Provider",
    "core",
    "providers/gplusProvider"
-], function($, _, core) {
+], function($, _, Provider, core) {

    var mediaImporter = {};

    // Create a map with providerId: providerModule
    var providerMap = _.chain(arguments).map(function(argument) {
-        return argument && argument.providerId && [
+        return argument instanceof Provider && [
            argument.providerId,
            argument
        ];
--- a/js/providers/bloggerProvider.js
+++ b/js/providers/bloggerProvider.js
@ -1,19 +1,15 @@
 define([
    "underscore",
    "utils",
+    "classes/Provider",
    "helpers/googleHelper"
-], function(_, utils, googleHelper) {
+], function(_, utils, Provider, googleHelper) {

-    var PROVIDER_BLOGGER = "blogger";
-
-    var bloggerProvider = {
-        providerId: PROVIDER_BLOGGER,
-        providerName: "Blogger",
-        defaultPublishFormat: "html",
-        publishPreferencesInputIds: [
+    var bloggerProvider = new Provider("blogger", "Blogger");
+    bloggerProvider.defaultPublishFormat = "html";
+    bloggerProvider.publishPreferencesInputIds = [
        "blogger-url"
-        ]
-    };
+    ];

    bloggerProvider.publish = function(publishAttributes, title, content, callback) {
        googleHelper.uploadBlogger(publishAttributes.blogUrl, publishAttributes.blogId, publishAttributes.postId, publishAttributes.labelList, title, content, function(error, blogId, postId) {
--- a/js/providers/downloadProvider.js
+++ b/js/providers/downloadProvider.js
@ -1,17 +1,14 @@
 define([
    "jquery",
    "core",
+    "classes/Provider",
    "classes/AsyncTask"
-], function($, core, AsyncTask) {
+], function($, core, Provider, AsyncTask) {

-    var PROVIDER_DOWNLOAD = "download";
-
-    var downloadProvider = {
-        providerId: PROVIDER_DOWNLOAD,
-        sharingAttributes: [
+    var downloadProvider = new Provider("download");
+    downloadProvider.sharingAttributes = [
        "url"
-        ]
-    };
+    ];

    downloadProvider.importPublic = function(importParameters, callback) {
        var title = undefined;
--- a/js/providers/dropboxProvider.js
+++ b/js/providers/dropboxProvider.js
@ -1,18 +1,16 @@
 define([
    "underscore",
    "utils",
+    "classes/Provider",
    "extensionMgr",
    "fileMgr",
    "helpers/dropboxHelper"
-], function(_, utils, extensionMgr, fileMgr, dropboxHelper) {
+], function(_, utils, Provider, extensionMgr, fileMgr, dropboxHelper) {

    var PROVIDER_DROPBOX = "dropbox";

-    var dropboxProvider = {
-        providerId: PROVIDER_DROPBOX,
-        providerName: "Dropbox",
-        defaultPublishFormat: "template"
-    };
+    var dropboxProvider = new Provider(PROVIDER_DROPBOX, "Dropbox");
+    dropboxProvider.defaultPublishFormat = "template";

    function checkPath(path) {
        if(path === undefined) {
--- a/js/providers/gdriveProvider.js
+++ b/js/providers/gdriveProvider.js
@ -2,22 +2,20 @@ define([
    "underscore",
    "core",
    "utils",
+    "classes/Provider",
    "settings",
    "extensionMgr",
    "fileMgr",
    "helpers/googleHelper"
-], function(_, core, utils, settings, extensionMgr, fileMgr, googleHelper) {
+], function(_, core, utils, Provider, settings, extensionMgr, fileMgr, googleHelper) {

    var PROVIDER_GDRIVE = "gdrive";

-    var gdriveProvider = {
-        providerId: PROVIDER_GDRIVE,
-        providerName: "Google Drive",
-        defaultPublishFormat: "template",
-        exportPreferencesInputIds: [
+    var gdriveProvider = new Provider(PROVIDER_GDRIVE, "Google Drive");
+    gdriveProvider.defaultPublishFormat = "template";
+    gdriveProvider.exportPreferencesInputIds = [
        "gdrive-parentid"
-        ]
-    };
+    ];

    function createSyncIndex(id) {
        return "sync." + PROVIDER_GDRIVE + "." + id;
--- a/js/providers/gistProvider.js
+++ b/js/providers/gistProvider.js
@ -1,18 +1,14 @@
 define([
    "utils",
+    "classes/Provider",
    "helpers/githubHelper"
-], function(utils, githubHelper) {
+], function(utils, Provider, githubHelper) {

-    var PROVIDER_GIST = "gist";
-
-    var gistProvider = {
-        providerId: PROVIDER_GIST,
-        providerName: "Gist",
-        sharingAttributes: [
+    var gistProvider = new Provider("gist", "Gist");
+    gistProvider.sharingAttributes = [
        "gistId",
        "filename"
-        ]
-    };
+    ];

    gistProvider.publish = function(publishAttributes, title, content, callback) {
        githubHelper.uploadGist(publishAttributes.gistId, publishAttributes.filename, publishAttributes.isPublic, title, content, function(error, gistId) {
--- a/js/providers/githubProvider.js
+++ b/js/providers/githubProvider.js
@ -1,19 +1,15 @@
 define([
    "utils",
+    "classes/Provider",
    "settings",
    "helpers/githubHelper"
-], function(utils, settings, githubHelper) {
+], function(utils, Provider, settings, githubHelper) {

-    var PROVIDER_GITHUB = "github";
-
-    var githubProvider = {
-        providerId: PROVIDER_GITHUB,
-        providerName: "GitHub",
-        publishPreferencesInputIds: [
+    var githubProvider = new Provider("github", "GitHub");
+    githubProvider.publishPreferencesInputIds = [
        "github-reponame",
        "github-branch"
-        ]
-    };
+    ];

    githubProvider.publish = function(publishAttributes, title, content, callback) {
        var commitMsg = settings.commitMsg;
--- a/js/providers/gplusProvider.js
+++ b/js/providers/gplusProvider.js
@ -2,16 +2,14 @@ define([
    "underscore",
    "core",
    "utils",
+    "classes/Provider",
    "extensionMgr",
    "helpers/googleHelper"
-], function(_, core, utils, extensionMgr, googleHelper) {
+], function(_, core, utils, Provider, extensionMgr, googleHelper) {

    var PROVIDER_GPLUS = "gplus";

-    var gplusProvider = {
-        providerId: PROVIDER_GPLUS,
-        providerName: "Google+"
-    };
+    var gplusProvider = new Provider(PROVIDER_GPLUS, "Google+");

    function getThumbnailUrl(doc, size) {
        var result = undefined;
--- a/js/providers/sshProvider.js
+++ b/js/providers/sshProvider.js
@ -1,20 +1,16 @@
 define([
    "utils",
+    "classes/Provider",
    "helpers/sshHelper"
-], function(utils, sshHelper) {
+], function(utils, Provider, sshHelper) {

-    var PROVIDER_SSH = "ssh";
-
-    var sshProvider = {
-        providerId: PROVIDER_SSH,
-        providerName: "SSH server",
-        publishPreferencesInputIds: [
+    var sshProvider = new Provider("ssh", "SSH server");
+    sshProvider.publishPreferencesInputIds = [
        "ssh-host",
        "ssh-port",
        "ssh-username",
        "ssh-password"
-        ]
-    };
+    ];

    sshProvider.publish = function(publishAttributes, title, content, callback) {
        sshHelper.upload(publishAttributes.host, publishAttributes.port, publishAttributes.username, publishAttributes.password, publishAttributes.path, title, content, callback);
--- a/js/providers/tumblrProvider.js
+++ b/js/providers/tumblrProvider.js
@ -1,17 +1,13 @@
 define([
    "utils",
+    "classes/Provider",
    "helpers/tumblrHelper"
-], function(utils, tumblrHelper) {
+], function(utils, Provider, tumblrHelper) {

-    var PROVIDER_TUMBLR = "tumblr";
-
-    var tumblrProvider = {
-        providerId: PROVIDER_TUMBLR,
-        providerName: "Tumblr",
-        publishPreferencesInputIds: [
+    var tumblrProvider = new Provider("tumblr", "Tumblr");
+    tumblrProvider.publishPreferencesInputIds = [
        "tumblr-hostname"
-        ]
-    };
+    ];

    tumblrProvider.publish = function(publishAttributes, title, content, callback) {
        tumblrHelper.upload(publishAttributes.blogHostname, publishAttributes.postId, publishAttributes.tags, publishAttributes.format == "markdown" ? "markdown" : "html", title, content, function(error, postId) {
--- a/js/providers/wordpressProvider.js
+++ b/js/providers/wordpressProvider.js
@ -1,18 +1,14 @@
 define([
    "utils",
+    "classes/Provider",
    "helpers/wordpressHelper"
-], function(utils, wordpressHelper) {
+], function(utils, Provider, wordpressHelper) {

-    var PROVIDER_WORDPRESS = "wordpress";
-
-    var wordpressProvider = {
-        providerId: PROVIDER_WORDPRESS,
-        providerName: "WordPress",
-        defaultPublishFormat: "html",
-        publishPreferencesInputIds: [
+    var wordpressProvider = new Provider("wordpress", "WordPress");
+    wordpressProvider.defaultPublishFormat = "html";
+    wordpressProvider.publishPreferencesInputIds = [
        "wordpress-site"
-        ]
-    };
+    ];

    wordpressProvider.publish = function(publishAttributes, title, content, callback) {
        wordpressHelper.upload(publishAttributes.site, publishAttributes.postId, publishAttributes.tags, title, content, function(error, postId) {
--- a/js/publisher.js
+++ b/js/publisher.js
@ -8,6 +8,7 @@ define([
    "fileSystem",
    "fileMgr",
    "sharing",
+    "classes/Provider",
    "providers/bloggerProvider",
    "providers/dropboxProvider",
    "providers/gistProvider",
@ -16,13 +17,13 @@ define([
    "providers/sshProvider",
    "providers/tumblrProvider",
    "providers/wordpressProvider"
-], function($, _, core, utils, settings, extensionMgr, fileSystem, fileMgr, sharing) {
+], function($, _, core, utils, settings, extensionMgr, fileSystem, fileMgr, sharing, Provider) {

    var publisher = {};

    // Create a map with providerId: providerModule
    var providerMap = _.chain(arguments).map(function(argument) {
-        return argument && argument.providerId && [
+        return argument instanceof Provider && [
            argument.providerId,
            argument
        ];
--- a/js/sharing.js
+++ b/js/sharing.js
@ -6,15 +6,16 @@ define([
    "extensionMgr",
    "fileMgr",
    "classes/AsyncTask",
+    "classes/Provider",
    "providers/downloadProvider",
    "providers/gistProvider"
-], function($, _, core, utils, extensionMgr, fileMgr, AsyncTask) {
+], function($, _, core, utils, extensionMgr, fileMgr, AsyncTask, Provider) {

    var sharing = {};

    // Create a map with providerId: providerModule
    var providerMap = _.chain(arguments).map(function(argument) {
-        return argument && argument.providerId && [
+        return argument instanceof Provider && [
            argument.providerId,
            argument
        ];
--- a/js/synchronizer.js
+++ b/js/synchronizer.js
@ -6,15 +6,16 @@ define([
    "extensionMgr",
    "fileSystem",
    "fileMgr",
+    "classes/Provider",
    "providers/dropboxProvider",
    "providers/gdriveProvider"
-], function($, _, core, utils, extensionMgr, fileSystem, fileMgr) {
+], function($, _, core, utils, extensionMgr, fileSystem, fileMgr, Provider) {

    var synchronizer = {};

    // Create a map with providerId: providerModule
    var providerMap = _.chain(arguments).map(function(argument) {
-        return argument && argument.providerId && [
+        return argument instanceof Provider && [
            argument.providerId,
            argument
        ];
--- a/js/utils.js
+++ b/js/utils.js
@ -95,6 +95,23 @@ define([
        return value;
    };

+    // Return input value and check that it's a valid JavaScript object
+    utils.getInputJsValue = function(element, event) {
+        element = jqElt(element);
+        var value = utils.getInputTextValue(element, event);
+        if(value === undefined) {
+            return undefined;
+        }
+        try {
+            eval("var test=" + value);
+        }
+        catch(e) {
+            inputError(element, event);
+            return undefined;
+        }
+        return value;
+    };
+    
    // Return checkbox boolean value
    utils.getInputChecked = function(element) {
        element = jqElt(element);