FEATURE: Replace composer editor with ember version

.codeclimate.yml

@@ -6,7 +6,6 @@ languages:
 
 exclude_paths:
  - "app/assets/javascripts/defer/*"
- - "app/assets/javascripts/discourse/lib/Markdown.Editor.js"
  - "app/assets/javascripts/ember-addons/*"
  - "lib/autospec/*"
  - "lib/es6_module_transpiler/*"

.eslintignore

@@ -6,9 +6,7 @@ app/assets/javascripts/pagedown_custom.js
 app/assets/javascripts/vendor.js
 app/assets/javascripts/locales/i18n.js
 app/assets/javascripts/defer/html-sanitizer-bundle.js
-app/assets/javascripts/discourse/lib/Markdown.Editor.js
 app/assets/javascripts/ember-addons/
-jsapp/lib/Markdown.Editor.js
 lib/javascripts/locale/
 lib/javascripts/messageformat.js
 lib/javascripts/moment.js

app/assets/javascripts/discourse/components/composer-editor.js.es6

@@ -0,0 +1,354 @@
+import userSearch from 'discourse/lib/user-search';
+import { default as computed, on } from 'ember-addons/ember-computed-decorators';
+import { linkSeenMentions, fetchUnseenMentions } from 'discourse/lib/link-mentions';
+
+export default Ember.Component.extend({
+  classNames: ['wmd-controls'],
+  classNameBindings: [':wmd-controls', 'showPreview', 'showPreview::hide-preview'],
+
+  uploadProgress: 0,
+  showPreview: true,
+  _xhr: null,
+
+  @computed
+  uploadPlaceholder() {
+    return `[${I18n.t('uploading')}]() `;
+  },
+
+  @on('init')
+  _setupPreview() {
+    const val = (Discourse.Mobile.mobileView ? false : (this.keyValueStore.get('composer.showPreview') || 'true'));
+    this.set('showPreview', val === 'true');
+  },
+
+  @computed('showPreview')
+  toggleText: function(showPreview) {
+    return showPreview ? I18n.t('composer.hide_preview') : I18n.t('composer.show_preview');
+  },
+
+  @computed
+  markdownOptions() {
+    return {
+      lookupAvatarByPostNumber: (postNumber, topicId) => {
+        const topic = this.get('topic');
+        if (!topic) { return; }
+
+        const posts = topic.get('postStream.posts');
+        if (posts && topicId === topic.get('id')) {
+          const quotedPost = posts.findProperty("post_number", postNumber);
+          if (quotedPost) {
+            return Discourse.Utilities.tinyAvatar(quotedPost.get('avatar_template'));
+          }
+        }
+      }
+    };
+  },
+
+  @on('didInsertElement')
+  _composerEditorInit() {
+    const topicId = this.get('topic.id');
+    const template = this.container.lookup('template:user-selector-autocomplete.raw');
+    const $input = this.$('.d-editor-input');
+    $input.autocomplete({
+      template,
+      dataSource: term => userSearch({ term, topicId, includeGroups: true }),
+      key: "@",
+      transformComplete: v => v.username || v.usernames.join(", @")
+    });
+
+    // Focus on the body unless we have a title
+    if (!this.get('composer.canEditTitle') && !Discourse.Mobile.mobileView) {
+      this.$('.d-editor-input').putCursorAtEnd();
+    }
+
+    this._bindUploadTarget();
+    this.appEvents.trigger('composer:opened');
+  },
+
+  @computed('composer.reply', 'composer.replyLength', 'composer.missingReplyCharacters', 'composer.minimumPostLength', 'lastValidatedAt')
+  validation(reply, replyLength, missingReplyCharacters, minimumPostLength, lastValidatedAt) {
+    const postType = this.get('composer.post.post_type');
+    if (postType === this.site.get('post_types.small_action')) { return; }
+
+    let reason;
+    if (replyLength < 1) {
+      reason = I18n.t('composer.error.post_missing');
+    } else if (missingReplyCharacters > 0) {
+      reason = I18n.t('composer.error.post_length', {min: minimumPostLength});
+      const tl = Discourse.User.currentProp("trust_level");
+      if (tl === 0 || tl === 1) {
+        reason += "<br/>" + I18n.t('composer.error.try_like');
+      }
+    }
+
+    if (reason) {
+      return Discourse.InputValidation.create({ failed: true, reason, lastShownAt: lastValidatedAt });
+    }
+  },
+
+  _renderUnseen: function($preview, unseen) {
+    fetchUnseenMentions($preview, unseen, this.siteSettings).then(() => {
+      linkSeenMentions($preview, this.siteSettings);
+      this.trigger('previewRefreshed', $preview);
+    });
+  },
+
+  _resetUpload() {
+    this.setProperties({ uploadProgress: 0, isUploading: false });
+    this.set('composer.reply', this.get('composer.reply').replace(this.get('uploadPlaceholder'), ""));
+  },
+
+  _bindUploadTarget() {
+    this._unbindUploadTarget(); // in case it's still bound, let's clean it up first
+
+    const $element = this.$();;
+    const csrf = this.session.get('csrfToken');
+    const uploadPlaceholder = this.get('uploadPlaceholder');
+
+    $element.fileupload({
+      url: Discourse.getURL(`/uploads.json?client_id=${this.messageBus.clientId}&authenticity_token=${encodeURIComponent(csrf)}`),
+      dataType: "json",
+      pasteZone: $element,
+    });
+
+    $element.on('fileuploadsubmit', (e, data) => {
+      const isUploading = Discourse.Utilities.validateUploadedFiles(data.files);
+      data.formData = { type: "composer" };
+      this.setProperties({ uploadProgress: 0, isUploading });
+      return isUploading;
+    });
+
+    $element.on("fileuploadprogressall", (e, data) => {
+      this.set("uploadProgress", parseInt(data.loaded / data.total * 100, 10));
+    });
+
+    $element.on("fileuploadsend", (e, data) => {
+      // add upload placeholder
+      this.appEvents.trigger('composer:insert-text', uploadPlaceholder);
+
+      if (data.xhr) {
+        this._xhr = data.xhr();
+      }
+    });
+
+    $element.on("fileuploadfail", (e, data) => {
+      this._resetUpload();
+
+      const userCancelled = this._xhr && this._xhr._userCancelled;
+      this._xhr = null;
+
+      if (!userCancelled) {
+        Discourse.Utilities.displayErrorForUpload(data);
+      }
+    });
+
+    this.messageBus.subscribe("/uploads/composer", upload => {
+      // replace upload placeholder
+      if (upload && upload.url) {
+        if (!this._xhr || !this._xhr._userCancelled) {
+          const markdown = Discourse.Utilities.getUploadMarkdown(upload);
+          this.set('composer.reply', this.get('composer.reply').replace(uploadPlaceholder, markdown));
+        }
+      } else {
+        Discourse.Utilities.displayErrorForUpload(upload);
+      }
+
+      // reset upload state
+      this._resetUpload();
+    });
+
+    if (Discourse.Mobile.mobileView) {
+      this.$(".mobile-file-upload").on("click.uploader", function () {
+        // redirect the click on the hidden file input
+        $("#mobile-uploader").click();
+      });
+    }
+
+    this._firefoxPastingHack();
+  },
+
+  // Believe it or not pasting an image in Firefox doesn't work without this code
+  _firefoxPastingHack() {
+    const uaMatch = navigator.userAgent.match(/Firefox\/(\d+)\.\d/);
+    if (uaMatch && parseInt(uaMatch[1]) >= 24) {
+      this.$().append( Ember.$("<div id='contenteditable' contenteditable='true' style='height: 0; width: 0; overflow: hidden'></div>") );
+      this.$("textarea").off('keydown.contenteditable');
+      this.$("textarea").on('keydown.contenteditable', event => {
+        // Catch Ctrl+v / Cmd+v and hijack focus to a contenteditable div. We can't
+        // use the onpaste event because for some reason the paste isn't resumed
+        // after we switch focus, probably because it is being executed too late.
+        if ((event.ctrlKey || event.metaKey) && (event.keyCode === 86)) {
+          // Save the current textarea selection.
+          const textarea = this.$("textarea")[0];
+          const selectionStart = textarea.selectionStart;
+          const selectionEnd = textarea.selectionEnd;
+
+          // Focus the contenteditable div.
+          const contentEditableDiv = this.$('#contenteditable');
+          contentEditableDiv.focus();
+
+          // The paste doesn't finish immediately and we don't have any onpaste
+          // event, so wait for 100ms which _should_ be enough time.
+          setTimeout(() => {
+            const pastedImg  = contentEditableDiv.find('img');
+
+            if ( pastedImg.length === 1 ) {
+              pastedImg.remove();
+            }
+
+            // For restoring the selection.
+            textarea.focus();
+            const textareaContent = $(textarea).val(),
+                startContent = textareaContent.substring(0, selectionStart),
+                endContent = textareaContent.substring(selectionEnd);
+
+            const restoreSelection = function(pastedText) {
+              $(textarea).val( startContent + pastedText + endContent );
+              textarea.selectionStart = selectionStart + pastedText.length;
+              textarea.selectionEnd = textarea.selectionStart;
+            };
+
+            if (contentEditableDiv.html().length > 0) {
+              // If the image wasn't the only pasted content we just give up and
+              // fall back to the original pasted text.
+              contentEditableDiv.find("br").replaceWith("\n");
+              restoreSelection(contentEditableDiv.text());
+            } else {
+              // Depending on how the image is pasted in, we may get either a
+              // normal URL or a data URI. If we get a data URI we can convert it
+              // to a Blob and upload that, but if it is a regular URL that
+              // operation is prevented for security purposes. When we get a regular
+              // URL let's just create an <img> tag for the image.
+              const imageSrc = pastedImg.attr('src');
+
+              if (imageSrc.match(/^data:image/)) {
+                // Restore the cursor position, and remove any selected text.
+                restoreSelection("");
+
+                // Create a Blob to upload.
+                const image = new Image();
+                image.onload = function() {
+                  // Create a new canvas.
+                  const canvas = document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
+                  canvas.height = image.height;
+                  canvas.width = image.width;
+                  const ctx = canvas.getContext('2d');
+                  ctx.drawImage(image, 0, 0);
+
+                  canvas.toBlob(blob => this.$().fileupload('add', {files: blob}));
+                };
+                image.src = imageSrc;
+              } else {
+                restoreSelection("<img src='" + imageSrc + "'>");
+              }
+            }
+
+            contentEditableDiv.html('');
+          }, 100);
+        }
+      });
+    }
+  },
+
+  @on('willDestroyElement')
+  _unbindUploadTarget() {
+    this.$(".mobile-file-upload").off("click.uploader");
+    this.messageBus.unsubscribe("/uploads/composer");
+    const $uploadTarget = this.$();
+    try { $uploadTarget.fileupload("destroy"); }
+    catch (e) { /* wasn't initialized yet */ }
+    $uploadTarget.off();
+  },
+
+  @on('willDestroyElement')
+  _composerClosed() {
+    Ember.run.next(() => {
+      $('#main-outlet').css('padding-bottom', 0);
+      // need to wait a bit for the "slide down" transition of the composer
+      Ember.run.later(() => this.appEvents.trigger("composer:closed"), 400);
+    });
+  },
+
+  actions: {
+    importQuote(toolbarEvent) {
+      this.sendAction('importQuote', toolbarEvent);
+    },
+
+    cancelUpload() {
+      if (this._xhr) {
+        this._xhr._userCancelled = true;
+        this._xhr.abort();
+        this._resetUpload();
+      }
+      this._resetUpload();
+    },
+
+    showOptions() {
+      const myPos = this.$().position();
+      const buttonPos = this.$('.options').position();
+
+      this.sendAction('showOptions', { position: "absolute",
+                                       left: myPos.left + buttonPos.left,
+                                       top: myPos.top + buttonPos.top });
+    },
+
+    showUploadModal(toolbarEvent) {
+      this.sendAction('showUploadSelector', toolbarEvent);
+    },
+
+    togglePreview() {
+      this.toggleProperty('showPreview');
+      this.keyValueStore.set({ key: 'composer.showPreview', value: this.get('showPreview') });
+    },
+
+    extraButtons(toolbar) {
+      toolbar.addButton({
+        id: 'quote',
+        group: 'fontStyles',
+        icon: 'comment-o',
+        sendAction: 'importQuote',
+        title: 'composer.quote_post_title',
+        unshift: true
+      });
+
+      toolbar.addButton({
+        id: 'upload',
+        group: 'insertions',
+        icon: 'upload',
+        title: 'upload',
+        sendAction: 'showUploadModal'
+      });
+
+      if (this.get('canWhisper')) {
+        toolbar.addButton({
+          id: 'options',
+          group: 'extras',
+          icon: 'gear',
+          title: 'composer.options',
+          sendAction: 'showOptions'
+        });
+      }
+    },
+
+    previewUpdated($preview) {
+      // Paint mentions
+      const unseen = linkSeenMentions($preview, this.siteSettings);
+      if (unseen.length) {
+        Ember.run.debounce(this, this._renderUnseen, $preview, unseen, 500);
+      }
+
+      const post = this.get('composer.post');
+      let refresh = false;
+
+      // If we are editing a post, we'll refresh its contents once. This is a feature that
+      // allows a user to refresh its contents once.
+      if (post && !post.get('refreshedPost')) {
+        refresh = true;
+        post.set('refreshedPost', true);
+      }
+
+      // Paint oneboxes
+      $('a.onebox', $preview).each((i, e) => Discourse.Onebox.load(e, refresh));
+    },
+  }
+});

app/assets/javascripts/discourse/components/composer-text-area.js.es6

@@ -1,15 +0,0 @@
-export default Ember.TextArea.extend({
-  classNameBindings: [':wmd-input'],
-
-  placeholder: function() {
-    return I18n.t('composer.reply_placeholder');
-  }.property('placeholderKey'),
-
-  _signalParentInsert: function() {
-    this.get('parentView').childDidInsertElement(this);
-  }.on('didInsertElement'),
-
-  _signalParentDestroy: function() {
-    this.get('parentView').childWillDestroyElement(this);
-  }.on('willDestroyElement')
-});

app/assets/javascripts/discourse/components/composer-title.js.es6

@@ -0,0 +1,29 @@
+import { default as computed, on } from 'ember-addons/ember-computed-decorators';
+
+export default Ember.Component.extend({
+  classNames: ['title-input'],
+
+  @on('didInsertElement')
+  _focusOnReply() {
+    if (!Discourse.Mobile.mobileView) {
+      this.$('input').putCursorAtEnd();
+    }
+  },
+
+  @computed('composer.titleLength', 'composer.missingTitleCharacters', 'composer.minimumTitleLength', 'lastValidatedAt')
+  validation(titleLength, missingTitleChars, minimumTitleLength, lastValidatedAt) {
+
+    let reason;
+    if (titleLength < 1) {
+      reason = I18n.t('composer.error.title_missing');
+    } else if (missingTitleChars > 0) {
+      reason = I18n.t('composer.error.title_too_short', {min: minimumTitleLength});
+    } else if (titleLength > this.siteSettings.max_topic_title_length) {
+      reason = I18n.t('composer.error.title_too_long', {max: this.siteSettings.max_topic_title_length});
+    }
+
+    if (reason) {
+      return Discourse.InputValidation.create({ failed: true, reason, lastShownAt: lastValidatedAt });
+    }
+  }
+});

app/assets/javascripts/discourse/components/d-editor.js.es6

@@ -1,6 +1,6 @@
 /*global Mousetrap:true */
 import loadScript from 'discourse/lib/load-script';
-import { default as property, on } from 'ember-addons/ember-computed-decorators';
+import { default as computed, on } from 'ember-addons/ember-computed-decorators';
 import { showSelector } from "discourse/lib/emoji/emoji-toolbar";
 
 // Our head can be a static string or a function that returns a string
@@ -111,6 +111,10 @@ Toolbar.prototype.addButton = function(button) {
     perform: button.perform || Ember.K
   };
 
+  if (button.sendAction) {
+    createdButton.sendAction = button.sendAction;
+  }
+
   const title = I18n.t(button.title || `composer.${button.id}_title`);
   if (button.shortcut) {
     const mac = /Mac|iPod|iPhone|iPad/.test(navigator.platform);
@@ -130,7 +134,11 @@ Toolbar.prototype.addButton = function(button) {
     createdButton.title = title;
   }
 
+  if (button.unshift) {
+    g.buttons.unshift(createdButton);
+  } else {
     g.buttons.push(createdButton);
+  }
 };
 
 export function onToolbarCreate(func) {
@@ -144,9 +152,16 @@ export default Ember.Component.extend({
   link: '',
   lastSel: null,
 
+  @computed('placeholder')
+  placeholderTranslated(placeholder) {
+    if (placeholder) return I18n.t(placeholder);
+    return null;
+  },
+
   @on('didInsertElement')
   _startUp() {
     this._applyEmojiAutocomplete();
+
     loadScript('defer/html-sanitizer-bundle').then(() => this.set('ready', true));
 
     const shortcuts = this.get('toolbar.shortcuts');
@@ -156,27 +171,52 @@ export default Ember.Component.extend({
         this.send(button.action, button);
       });
     });
+
+    // disable clicking on links in the preview
+    this.$('.d-editor-preview').on('click.preview', e => {
+      e.preventDefault();
+      return false;
+    });
+
+    this.appEvents.on('composer:insert-text', text => {
+      this._addText(this._getSelected(), text);
+    });
   },
 
   @on('willDestroyElement')
   _shutDown() {
+    this.appEvents.off('composer:insert-text');
+
     Ember.keys(this.get('toolbar.shortcuts')).forEach(sc => {
       Mousetrap(this.$('.d-editor-input')[0]).unbind(sc);
     });
+    this.$('.d-editor-preview').off('click.preview');
   },
 
-  @property
+  @computed
   toolbar() {
     const toolbar = new Toolbar();
     _createCallbacks.forEach(cb => cb(toolbar));
+    this.sendAction('extraButtons', toolbar);
     return toolbar;
   },
 
-  @property('ready', 'value')
+  @computed('ready', 'value')
   preview(ready, value) {
     if (!ready) { return; }
 
-    const text = Discourse.Dialect.cook(value || "", {sanitize: true});
+    const markdownOptions = this.get('markdownOptions') || {};
+    markdownOptions.sanitize = true;
+
+    const text = Discourse.Dialect.cook(value || "", markdownOptions);
+    Ember.run.scheduleOnce('afterRender', () => {
+      if (this._state !== "inDOM") { return; }
+      const $preview = this.$('.d-editor-preview');
+      if ($preview.length === 0) return;
+
+      this.sendAction('previewUpdated', $preview);
+    });
+
     return text ? text : "";
   },
 
@@ -339,12 +379,18 @@ export default Ember.Component.extend({
   actions: {
     toolbarButton(button) {
       const selected = this._getSelected();
-      button.perform({
+      const toolbarEvent = {
         selected,
         applySurround: (head, tail, exampleKey) => this._applySurround(selected, head, tail, exampleKey),
         applyList: (head, exampleKey) => this._applyList(selected, head, exampleKey),
         addText: text => this._addText(selected, text)
-      });
+      };
+
+      if (button.sendAction) {
+        return this.sendAction(button.sendAction, toolbarEvent);
+      } else {
+        button.perform(toolbarEvent);
+      }
     },
 
     showLinkModal() {

app/assets/javascripts/discourse/components/edit-category-topic-template.js.es6

@@ -5,7 +5,7 @@ export default buildCategoryPanel('topic-template', {
     if (this.get('activeTab')) {
       const self = this;
       Ember.run.schedule('afterRender', function() {
-        self.$('.wmd-input').focus();
+        self.$('.d-editor-input').focus();
       });
     }
   }.observes('activeTab')

app/assets/javascripts/discourse/components/image-uploader.js.es6

@@ -1,10 +1,10 @@
-import property from 'ember-addons/ember-computed-decorators';
+import computed from 'ember-addons/ember-computed-decorators';
 import UploadMixin from "discourse/mixins/upload";
 
 export default Em.Component.extend(UploadMixin, {
   classNames: ["image-uploader"],
 
-  @property('imageUrl')
+  @computed('imageUrl')
   backgroundStyle(imageUrl) {
     if (Em.isNone(imageUrl)) { return; }
     return `background-image: url(${imageUrl})`.htmlSafe();

app/assets/javascripts/discourse/components/popup-input-tip.js.es6

@@ -1,9 +1,9 @@
 import StringBuffer from 'discourse/mixins/string-buffer';
 import { iconHTML } from 'discourse/helpers/fa-icon';
-import { observes } from 'ember-addons/ember-computed-decorators';
+import { default as computed, observes } from 'ember-addons/ember-computed-decorators';
 
 export default Ember.Component.extend(StringBuffer, {
-  classNameBindings: [':popup-tip', 'good', 'bad', 'shownAt::hide'],
+  classNameBindings: [':popup-tip', 'good', 'bad', 'lastShownAt::hide'],
   animateAttribute: null,
   bouncePixels: 6,
   bounceDelay: 100,
@@ -16,9 +16,14 @@ export default Ember.Component.extend(StringBuffer, {
   bad: Ember.computed.alias("validation.failed"),
   good: Ember.computed.not("bad"),
 
-  @observes("shownAt")
+  @computed('shownAt', 'validation.lastShownAt')
+  lastShownAt(shownAt, lastShownAt) {
+    return shownAt || lastShownAt;
+  },
+
+  @observes('lastShownAt')
   bounce() {
-    if (this.get("shownAt")) {
+    if (this.get("lastShownAt")) {
       var $elem = this.$();
       if (!this.animateAttribute) {
         this.animateAttribute = $elem.css('left') === 'auto' ? 'right' : 'left';

app/assets/javascripts/discourse/components/post-gutter.js.es6

@@ -2,7 +2,7 @@ const MAX_SHOWN = 5;
 
 import StringBuffer from 'discourse/mixins/string-buffer';
 import { iconHTML } from 'discourse/helpers/fa-icon';
-import property from 'ember-addons/ember-computed-decorators';
+import computed from 'ember-addons/ember-computed-decorators';
 
 const { get, isEmpty, Component } = Ember;
 
@@ -12,7 +12,7 @@ export default Component.extend(StringBuffer, {
   rerenderTriggers: ['expanded'],
 
   // Roll up links to avoid duplicates
-  @property('links')
+  @computed('links')
   collapsed(links) {
     const seen = {};
     const result = [];

app/assets/javascripts/discourse/controllers/composer.js.es6

@@ -1,9 +1,8 @@
-import { setting } from 'discourse/lib/computed';
 import DiscourseURL from 'discourse/lib/url';
 import Quote from 'discourse/lib/quote';
 import Draft from 'discourse/models/draft';
 import Composer from 'discourse/models/composer';
-import computed from 'ember-addons/ember-computed-decorators';
+import { default as computed, observes } from 'ember-addons/ember-computed-decorators';
 
 function loadDraft(store, opts) {
   opts = opts || {};
@@ -50,17 +49,17 @@ export default Ember.Controller.extend({
 
   showEditReason: false,
   editReason: null,
-  maxTitleLength: setting('max_topic_title_length'),
   scopedCategoryId: null,
   similarTopics: null,
   similarTopicsMessage: null,
   lastSimilaritySearch: null,
   optionsVisible: false,
 
-  topic: null,
+  lastValidatedAt: null,
 
-  // TODO: Remove this, very bad
-  view: null,
+  isUploading: false,
+
+  topic: null,
 
   _initializeSimilar: function() {
     this.set('similarTopics', []);
@@ -109,7 +108,7 @@ export default Ember.Controller.extend({
     },
 
     // Import a quote from the post
-    importQuote() {
+    importQuote(toolbarEvent) {
       const postStream = this.get('topic.postStream');
       let postId = this.get('model.post.id');
 
@@ -135,7 +134,7 @@ export default Ember.Controller.extend({
 
         return this.store.find('post', postId).then(function(post) {
           const quote = Quote.build(post, post.get("raw"), {raw: true, full: true});
-          composer.appendBlockAtCursor(quote);
+          toolbarEvent.addText(quote);
           composer.set('model.loading', false);
         });
       }
@@ -173,39 +172,10 @@ export default Ember.Controller.extend({
 
   },
 
-  appendText(text, opts) {
-    const c = this.get('model');
-    if (c) {
-      opts = opts || {};
-      const wmd = $('.wmd-input'),
-            val = wmd.val() || '',
-            position = opts.position === "cursor" ? wmd.caret() : val.length,
-            caret = c.appendText(text, position, opts);
-
-      if (wmd[0]) {
-        Em.run.next(() => Discourse.Utilities.setCaretPosition(wmd[0], caret));
-      }
-    }
-  },
-
-  appendTextAtCursor(text, opts) {
-    opts = opts || {};
-    opts.position = "cursor";
-    this.appendText(text, opts);
-  },
-
-  appendBlockAtCursor(text, opts) {
-    opts = opts || {};
-    opts.position = "cursor";
-    opts.block = true;
-    this.appendText(text, opts);
-  },
-
   categories: function() {
     return Discourse.Category.list();
   }.property(),
 
-
   toggle() {
     this.closeAutocomplete();
     switch (this.get('model.composeState')) {
@@ -225,7 +195,7 @@ export default Ember.Controller.extend({
     return false;
   },
 
-  disableSubmit: Ember.computed.or("model.loading", "view.isUploading"),
+  disableSubmit: Ember.computed.or("model.loading", "isUploading"),
 
   save(force) {
     const composer = this.get('model');
@@ -237,12 +207,7 @@ export default Ember.Controller.extend({
     }
 
     if (composer.get('cantSubmitPost')) {
-      const now = Date.now();
-      this.setProperties({
-        'view.showTitleTip': now,
-        'view.showCategoryTip': now,
-        'view.showReplyTip': now
-      });
+      this.set('lastValidatedAt', Date.now());
       return;
     }
 
@@ -291,10 +256,18 @@ export default Ember.Controller.extend({
     var staged = false;
     const disableJumpReply = Discourse.User.currentProp('disable_jump_reply');
 
-    const promise = composer.save({
-      imageSizes: this.get('view').imageSizes(),
-      editReason: this.get("editReason")
-    }).then(function(result) {
+    // TODO: This should not happen in model
+    const imageSizes = {};
+    $('#reply-control .d-editor-preview img').each((i, e) => {
+      const $img = $(e);
+      const src = $img.prop('src');
+
+      if (src && src.length) {
+        imageSizes[src] = { width: $img.width(), height: $img.height() };
+      }
+    });
+
+    const promise = composer.save({ imageSizes, editReason: this.get("editReason")}).then(function(result) {
       if (result.responseJson.action === "enqueued") {
         self.send('postWasEnqueued', result.responseJson);
         self.destroyDraft();
@@ -366,8 +339,8 @@ export default Ember.Controller.extend({
     // We don't care about similar topics unless creating a topic
     if (!this.get('model.creatingTopic')) { return; }
 
-    let body = this.get('model.reply');
-    const title = this.get('model.title');
+    let body = this.get('model.reply') || '';
+    const title = this.get('model.title') || '';
 
     // Ensure the fields are of the minimum length
     if (body.length < Discourse.SiteSettings.min_body_similar_length) { return; }
@@ -405,11 +378,6 @@ export default Ember.Controller.extend({
     });
   },
 
-  saveDraft() {
-    const model = this.get('model');
-    if (model) { model.saveDraft(); }
-  },
-
   /**
     Open the composer view
 
@@ -502,7 +470,7 @@ export default Ember.Controller.extend({
     composerModel.set('composeState', Discourse.Composer.OPEN);
     composerModel.set('isWarning', false);
 
-    if (opts.topicTitle && opts.topicTitle.length <= this.get('maxTitleLength')) {
+    if (opts.topicTitle && opts.topicTitle.length <= this.siteSettings.max_topic_title_length) {
       this.set('model.title', opts.topicTitle);
     }
 
@@ -572,7 +540,6 @@ export default Ember.Controller.extend({
     });
   },
 
-
   shrink() {
     if (this.get('model.replyDirty')) {
       this.collapse();
@@ -581,22 +548,34 @@ export default Ember.Controller.extend({
     }
   },
 
+  _saveDraft() {
+    const model = this.get('model');
+    if (model) { model.saveDraft(); };
+  },
+
+  @observes('model.reply', 'model.title')
+  _shouldSaveDraft() {
+    Ember.run.debounce(this, this._saveDraft, 2000);
+  },
+
+  @computed('model.categoryId', 'lastValidatedAt')
+  categoryValidation(categoryId, lastValidatedAt) {
+    if( !this.siteSettings.allow_uncategorized_topics && !categoryId) {
+      return Discourse.InputValidation.create({ failed: true, reason: I18n.t('composer.error.category_missing'), lastShownAt: lastValidatedAt });
+    }
+  },
+
   collapse() {
-    this.saveDraft();
+    this._saveDraft();
     this.set('model.composeState', Discourse.Composer.DRAFT);
   },
 
   close() {
-    this.setProperties({
-      model: null,
-      'view.showTitleTip': false,
-      'view.showCategoryTip': false,
-      'view.showReplyTip': false
-    });
+    this.setProperties({ model: null, lastValidatedAt: null });
   },
 
   closeAutocomplete() {
-    $('.wmd-input').autocomplete({ cancel: true });
+    $('.d-editor-input').autocomplete({ cancel: true });
   },
 
   showOptions() {

app/assets/javascripts/discourse/controllers/quote-button.js.es6

@@ -1,6 +1,6 @@
 import loadScript from 'discourse/lib/load-script';
 import Quote from 'discourse/lib/quote';
-import property from 'ember-addons/ember-computed-decorators';
+import computed from 'ember-addons/ember-computed-decorators';
 
 export default Ember.Controller.extend({
   needs: ['topic', 'composer'],
@@ -9,7 +9,7 @@ export default Ember.Controller.extend({
     loadScript('defer/html-sanitizer-bundle');
   }.on('init'),
 
-  @property('buffer', 'postId')
+  @computed('buffer', 'postId')
   post(buffer, postId) {
     if (!postId || Ember.isEmpty(buffer)) { return null; }
 
@@ -135,7 +135,7 @@ export default Ember.Controller.extend({
     const quotedText = Quote.build(post, buffer);
     composerOpts.quote = quotedText;
     if (composerController.get('content.viewOpen') || composerController.get('content.viewDraft')) {
-      composerController.appendBlockAtCursor(quotedText.trim());
+      this.appEvents.trigger('composer:insert-text', quotedText.trim());
     } else {
       composerController.open(composerOpts);
     }

app/assets/javascripts/discourse/controllers/topic.js.es6

@@ -3,7 +3,6 @@ import SelectedPostsCount from 'discourse/mixins/selected-posts-count';
 import { spinnerHTML } from 'discourse/helpers/loading-spinner';
 import Topic from 'discourse/models/topic';
 import Quote from 'discourse/lib/quote';
-import { setting } from 'discourse/lib/computed';
 import { popupAjaxError } from 'discourse/lib/ajax-error';
 import computed from 'ember-addons/ember-computed-decorators';
 
@@ -24,8 +23,6 @@ export default Ember.Controller.extend(SelectedPostsCount, BufferedContent, {
   showRecover: Em.computed.and('model.deleted', 'model.details.can_recover'),
   isFeatured: Em.computed.or("model.pinned_at", "model.isBanner"),
 
-  maxTitleLength: setting('max_topic_title_length'),
-
   _titleChanged: function() {
     const title = this.get('model.title');
     if (!Ember.isEmpty(title)) {

app/assets/javascripts/discourse/controllers/upload-selector.js.es6

@@ -1,14 +1,58 @@
 import ModalFunctionality from 'discourse/mixins/modal-functionality';
+import { default as computed } from 'ember-addons/ember-computed-decorators';
+
+export function uploadTranslate(key, options) {
+  options = options || {};
+  if (Discourse.Utilities.allowsAttachments()) { key += "_with_attachments"; }
+  return I18n.t(`upload_selector.${key}`, options);
+}
 
 export default Ember.Controller.extend(ModalFunctionality, {
   showMore: false,
   local: true,
+  imageUrl: null,
+  imageLink: null,
   remote: Ember.computed.not("local"),
 
+  @computed
+  uploadIcon() {
+    return Discourse.Utilities.allowsAttachments() ? "upload" : "picture-o";
+  },
+
+  @computed('controller.local')
+  tip(local) {
+    const source = local ? "local" : "remote";
+    const authorized_extensions = Discourse.Utilities.authorizesAllExtensions() ? "" : `(${Discourse.Utilities.authorizedExtensions()})`;
+    return uploadTranslate(`${source}_tip`, { authorized_extensions });
+  },
+
   actions: {
-    useLocal() { this.setProperties({ local: true, showMore: false}); },
-    useRemote() { this.set("local", false); },
-    toggleShowMore() { this.toggleProperty("showMore"); }
+    upload() {
+      if (this.get('local')) {
+        $('#reply-control').fileupload('add', { fileInput: $('#filename-input') });
+      } else {
+        const imageUrl = this.get('imageUrl') || '';
+        const imageLink = this.get('imageLink') || '';
+        const toolbarEvent = this.get('toolbarEvent');
+
+        if (this.get('showMore') && imageLink.length > 3) {
+          toolbarEvent.addText(`[![](${imageUrl})](${imageLink})`);
+        } else {
+          toolbarEvent.addText(imageUrl);
+        }
+        this.send('closeModal');
+      }
+    },
+
+    useLocal() {
+      this.setProperties({ local: true, showMore: false});
+    },
+    useRemote() {
+      this.set("local", false);
+    },
+    toggleShowMore() {
+      this.toggleProperty("showMore");
+    }
   }
 
 });

app/assets/javascripts/discourse/initializers/enable-emoji.js.es6

@@ -1,4 +1,3 @@
-import { showSelector } from "discourse/lib/emoji/emoji-toolbar";
 import { onToolbarCreate } from 'discourse/components/d-editor';
 
 export default {
@@ -8,7 +7,6 @@ export default {
     const siteSettings = container.lookup('site-settings:main');
 
     if (siteSettings.enable_emoji) {
-
       onToolbarCreate(toolbar => {
         toolbar.addButton({
           id: 'emoji',
@@ -20,20 +18,6 @@ export default {
         });
       });
 
-      window.PagedownCustom.appendButtons.push({
-        id: 'wmd-emoji-button',
-        description: I18n.t("composer.emoji"),
-        execute() {
-          showSelector({
-            container,
-            onSelect(title) {
-              const composerController = container.lookup('controller:composer');
-              composerController.appendTextAtCursor(`:${title}:`, {space: true});
-            },
-          });
-        }
-      });
-
       // enable plugin emojis
       Discourse.Emoji.applyCustomEmojis();
     }

app/assets/javascripts/discourse/initializers/ensure-max-image-dimensions.js.es6

@@ -18,6 +18,6 @@ export default {
     const style = 'max-width:' + width + 'px;' +
                   'max-height:' + height + 'px;';
 
-    $('<style id="image-sizing-hack">#reply-control .wmd-preview img:not(.thumbnail), .cooked img:not(.thumbnail) {' + style + '}</style>').appendTo('head');
+    $('<style id="image-sizing-hack">#reply-control .d-editor-preview img:not(.thumbnail), .cooked img:not(.thumbnail) {' + style + '}</style>').appendTo('head');
   }
 };

app/assets/javascripts/discourse/lib/markdown.js

@@ -1,5 +1,3 @@
-/*global Markdown, console */
-
 /**
   Contains methods to help us with markdown formatting.
 
@@ -152,58 +150,6 @@ Discourse.Markdown = {
     return this.markdownConverter(opts).makeHtml(raw);
   },
 
-  createEditor: function(options) {
-    options = options || {};
-
-    // By default we always sanitize content in the editor
-    options.sanitize = true;
-
-    var markdownConverter = Discourse.Markdown.markdownConverter(options);
-
-    var editorOptions = {
-      containerElement: options.containerElement,
-      strings: {
-        bold: I18n.t("composer.bold_title") + " <strong> Ctrl+B",
-        boldexample: I18n.t("composer.bold_text"),
-
-        italic: I18n.t("composer.italic_title") + " <em> Ctrl+I",
-        italicexample: I18n.t("composer.italic_text"),
-
-        link: I18n.t("composer.link_title") + " <a> Ctrl+L",
-        linkdescription: I18n.t("composer.link_description"),
-        linkdialog: "<p><b>" + I18n.t("composer.link_dialog_title") + "</b></p><p>http://example.com/ \"" +
-            I18n.t("composer.link_optional_text") + "\"</p>",
-
-        quote: I18n.t("composer.quote_title") + " <blockquote> Ctrl+Q",
-        quoteexample: I18n.t("composer.quote_text"),
-
-        code: I18n.t("composer.code_title") + " <pre><code> Ctrl+K",
-        codeexample: I18n.t("composer.code_text"),
-
-        image: I18n.t("composer.upload_title") + " - Ctrl+G",
-        imagedescription: I18n.t("composer.upload_description"),
-
-        olist: I18n.t("composer.olist_title") + " <ol> Ctrl+O",
-        ulist: I18n.t("composer.ulist_title") + " <ul> Ctrl+U",
-        litem: I18n.t("composer.list_item"),
-
-        heading: I18n.t("composer.heading_title") + " <h1>/<h2> Ctrl+H",
-        headingexample: I18n.t("composer.heading_text"),
-
-        hr: I18n.t("composer.hr_title") + " <hr> Ctrl+R",
-
-        undo: I18n.t("composer.undo_title") + " - Ctrl+Z",
-        redo: I18n.t("composer.redo_title") + " - Ctrl+Y",
-        redomac: I18n.t("composer.redo_title") + " - Ctrl+Shift+Z",
-
-        help: I18n.t("composer.help")
-      },
-      appendButtons: options.appendButtons
-    };
-
-    return new Markdown.Editor(markdownConverter, undefined, editorOptions);
-  },
-
   /**
     Checks to see if a URL is allowed in the cooked content
 

app/assets/javascripts/discourse/lib/show-modal.js.es6

@@ -1,4 +1,4 @@
-export default (name, opts) => {
+export default function(name, opts) {
   opts = opts || {};
 
   if (opts.__type) {

app/assets/javascripts/discourse/lib/utilities.js

@@ -215,10 +215,6 @@ Discourse.Utilities = {
     }
   },
 
-  getUploadPlaceholder: function() {
-    return "[" + I18n.t("uploading") + "]() ";
-  },
-
   isAnImage: function(path) {
     return (/\.(png|jpe?g|gif|bmp|tiff?|svg|webp)$/i).test(path);
   },

app/assets/javascripts/discourse/models/composer.js.es6

@@ -173,11 +173,6 @@ const Composer = RestModel.extend({
 
   }.property('action', 'post', 'topic', 'topic.title'),
 
-  toggleText: function() {
-    return this.get('showPreview') ? I18n.t('composer.hide_preview') : I18n.t('composer.show_preview');
-  }.property('showPreview'),
-
-  hidePreview: Em.computed.not('showPreview'),
 
   // whether to disable the post button
   cantSubmitPost: function() {
@@ -311,8 +306,6 @@ const Composer = RestModel.extend({
   }.property('reply'),
 
   _setupComposer: function() {
-    const val = (Discourse.Mobile.mobileView ? false : (this.keyValueStore.get('composer.showPreview') || 'true'));
-    this.set('showPreview', val === 'true');
     this.set('archetypeId', this.site.get('default_archetype'));
   }.on('init'),
 
@@ -364,11 +357,6 @@ const Composer = RestModel.extend({
     return before.length + text.length;
   },
 
-  togglePreview() {
-    this.toggleProperty('showPreview');
-    this.keyValueStore.set({ key: 'composer.showPreview', value: this.get('showPreview') });
-  },
-
   applyTopicTemplate(oldCategoryId, categoryId) {
     if (this.get('action') !== CREATE_TOPIC) { return; }
     let reply = this.get('reply');
@@ -680,7 +668,7 @@ const Composer = RestModel.extend({
   },
 
   getCookedHtml() {
-    return $('#reply-control .wmd-preview').html().replace(/<span class="marker"><\/span>/g, '');
+    return $('#reply-control .d-editor-preview').html().replace(/<span class="marker"><\/span>/g, '');
   },
 
   saveDraft() {

app/assets/javascripts/discourse/pre-initializers/sniff-capabilities.js.es6

@@ -6,24 +6,29 @@ export default {
   initialize(container, application) {
     const $html = $('html'),
           touch = $html.hasClass('touch') || (Modernizr.prefixed("MaxTouchPoints", navigator) > 1),
-          caps = Ember.Object.create();
+          caps = {touch};
 
     // Store the touch ability in our capabilities object
-    caps.set('touch', touch);
     $html.addClass(touch ? 'discourse-touch' : 'discourse-no-touch');
 
     // Detect Devices
     if (navigator) {
       const ua = navigator.userAgent;
       if (ua) {
-        caps.set('android', ua.indexOf('Android') !== -1);
-        caps.set('winphone', ua.indexOf('Windows Phone') !== -1);
+        caps.isAndroid = ua.indexOf('Android') !== -1;
+        caps.isWinphone = ua.indexOf('Windows Phone') !== -1;
+
+        caps.isOpera = !!window.opera || ua.indexOf(' OPR/') >= 0;
+        caps.isFirefox =  typeof InstallTrigger !== 'undefined';
+        caps.isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
+        caps.isChrome = !!window.chrome && !caps.isOpera;
+        caps.canPasteImages = caps.isChrome || caps.isFirefox;
       }
     }
 
     // We consider high res a device with 1280 horizontal pixels. High DPI tablets like
     // iPads should report as 1024.
-    caps.set('highRes', window.screen.width >= 1280);
+    caps.highRes = window.screen.width >= 1280;
 
     // Inject it
     application.register('capabilities:main', caps, { instantiate: false });

app/assets/javascripts/discourse/routes/application.js.es6

@@ -89,13 +89,11 @@ const ApplicationRoute = Discourse.Route.extend(OpenComposer, {
     },
 
     showNotActivated(props) {
-      const controller = showModal('not-activated', {title: 'log_in' });
-      controller.setProperties(props);
+      showModal('not-activated', {title: 'log_in' }).setProperties(props);
     },
 
-    showUploadSelector(composerView) {
-      showModal('uploadSelector');
-      this.controllerFor('upload-selector').setProperties({ composerView: composerView });
+    showUploadSelector(toolbarEvent) {
+      showModal('uploadSelector').setProperties({ toolbarEvent, imageUrl: null, imageLink: null });
     },
 
     showKeyboardShortcutsHelp() {

app/assets/javascripts/discourse/templates/components/composer-editor.hbs

@@ -0,0 +1,30 @@
+{{d-editor tabindex="4"
+           value=composer.reply
+           placeholder="composer.reply_placeholder"
+           previewUpdated="previewUpdated"
+           markdownOptions=markdownOptions
+           extraButtons="extraButtons"
+           importQuote="importQuote"
+           showOptions="showOptions"
+           showUploadModal="showUploadModal"
+           validation=validation
+           loading=composer.loading}}
+
+<div class="composer-bottom-right">
+  {{#if site.mobileView}}
+    <input type="file" id="mobile-uploader" />
+    <a class="mobile-file-upload {{if isUploading 'hidden'}}">{{i18n 'upload'}}</a>
+  {{else}}
+    <a href {{action "togglePreview"}} class='toggle-preview'>{{{toggleText}}}</a>
+  {{/if}}
+  {{#if isUploading}}
+    <div id="file-uploading">
+      {{loading-spinner size="small"}} {{i18n 'upload_selector.uploading'}}
+      {{uploadProgress}}%
+      <a href id="cancel-file-upload" {{action "cancelUpload"}}>{{fa-icon "times"}}</a>
+    </div>
+  {{/if}}
+  <div id='draft-status' class="{{if isUploading 'hidden'}}">
+    {{draftStatus}}
+  </div>
+</div>

app/assets/javascripts/discourse/templates/components/composer-title.hbs

@@ -0,0 +1,8 @@
+{{text-field value=composer.title
+             tabindex="2"
+             id="reply-title"
+             maxLength=siteSettings.max_topic_title_length
+             placeholderKey="composer.title_placeholder"
+             disabled=composer.loading}}
+
+{{popup-input-tip validation=validation}}

app/assets/javascripts/discourse/templates/components/d-editor.hbs

@@ -17,10 +17,17 @@
       {{/unless}}
     {{/each}}
   </div>
+  <div class='d-editor-preview-header'></div>
 
-  {{textarea value=value class="d-editor-input"}}
+  <div class="d-editor-textarea-wrapper">
+    {{conditional-loading-spinner condition=loading}}
+    {{textarea tabindex=tabindex value=value class="d-editor-input" placeholder=placeholderTranslated}}
+    {{popup-input-tip validation=validation}}
+  </div>
 
-  <div class="d-editor-preview {{unless preview 'hidden'}}">
+  <div class="d-editor-preview-wrapper">
+    <div class="d-editor-preview">
       {{{preview}}}
     </div>
   </div>
+</div>

app/assets/javascripts/discourse/templates/composer.hbs

@@ -56,15 +56,12 @@
                 {{/if}}
               {{/if}}
 
-              <div class="title-input">
-                {{text-field value=model.title tabindex="2" id="reply-title" maxLength=maxTitleLength placeholderKey="composer.title_placeholder"}}
-                {{popup-input-tip validation=view.titleValidation shownAt=view.showTitleTip}}
-              </div>
+              {{composer-title composer=model lastValidatedAt=lastValidatedAt}}
 
               {{#if model.showCategoryChooser}}
                 <div class="category-input">
                   {{category-chooser valueAttribute="id" value=model.categoryId scopedCategoryId=scopedCategoryId tabindex="3"}}
-                  {{popup-input-tip validation=view.categoryValidation shownAt=view.showCategoryTip}}
+                  {{popup-input-tip validation=categoryValidation}}
                 </div>
                 {{#if model.archetype.hasOptions}}
                   <button class='btn' {{action "showOptions"}}>{{i18n 'topic.options'}}</button>
@@ -77,35 +74,15 @@
           {{plugin-outlet "composer-fields"}}
         </div>
 
-        <div class='wmd-controls'>
-          <div class='textarea-wrapper'>
-            <div class='wmd-button-bar'></div>
-            <div class='wmd-preview-scroller'></div>
-            {{conditional-loading-spinner condition=model.loading}}
-            {{composer-text-area tabindex="4" value=model.reply}}
-            {{popup-input-tip validation=view.replyValidation shownAt=view.showReplyTip}}
-          </div>
-          <!-- keep the classes here in sync with post.hbs -->
-          <div class='preview-wrapper regular'>
-            <div class="wmd-preview cooked {{if model.hidePreview 'hidden'}}"></div>
-          </div>
-          <div class="composer-bottom-right">
-            {{#if site.mobileView}}
-              <input type="file" id="mobile-uploader" />
-              <a class="mobile-file-upload {{if view.isUploading 'hidden'}}">{{i18n 'upload'}}</a>
-            {{else}}
-              <a href {{action "togglePreview"}} class='toggle-preview'>{{{model.toggleText}}}</a>
-            {{/if}}
-            {{#if view.isUploading}}
-              <div id="file-uploading">
-                {{loading-spinner size="small"}} {{i18n 'upload_selector.uploading'}} {{view.uploadProgress}}% <a id="cancel-file-upload">{{fa-icon "times"}}</a>
-              </div>
-            {{/if}}
-            <div id='draft-status' class="{{if view.isUploading 'hidden'}}">
-              {{model.draftStatus}}
-            </div>
-          </div>
-        </div>
+        {{composer-editor topic=topic
+                          composer=model
+                          lastValidatedAt=lastValidatedAt
+                          canWhisper=canWhisper
+                          draftStatus=model.draftStatus
+                          isUploading=isUploading
+                          importQuote="importQuote"
+                          showOptions="showOptions"
+                          showUploadSelector="showUploadSelector"}}
 
         {{#if currentUser}}
           <div class='submit-panel'>

app/assets/javascripts/discourse/templates/modal/upload-selector.hbs

@@ -5,7 +5,7 @@
     {{#if local}}
       <div class="inputs">
         <input type="file" id="filename-input" multiple><br>
-        <span class="description">{{unbound view.tip}}</span>
+        <span class="description">{{tip}}</span>
       </div>
     {{/if}}
   </div>
@@ -14,31 +14,34 @@
     <label class="radio" for="remote">{{i18n 'upload_selector.from_the_web'}}</label>
     {{#if remote}}
       <div class="inputs">
-        <input type="text" id="fileurl-input" placeholder="http://example.com/image.png"><br>
-        <span class="description">{{unbound view.tip}}</span>
+        {{input value=imageUrl placeholder="http://example.com/image.png"}}
+        <span class="description">{{tip}}</span>
       </div>
     {{/if}}
   </div>
   {{#if showMore}}
     <div class="radios">
       <div class="inputs">
-        <input type="text" id="link-input" placeholder="http://example.com"><br>
+        {{input value=imageLink laceholder="http://example.com"}}
         <span class="description">{{i18n 'upload_selector.image_link'}}</span>
       </div>
     </div>
   {{/if}}
   <div class="radios">
     <div class="inputs">
-      <p class="hint">{{unbound view.hint}}</p>
+      <p class="hint">
+        {{#if capabilities.canPasteImages}}
+          {{i18n 'upload_selector.hint'}}
+        {{else}}
+          {{i18n 'upload_selector.hint_for_supported_browsers'}}
+        {{/if}}
+      </p>
     </div>
   </div>
 </div>
 
 <div class="modal-footer">
-  <button class="btn btn-primary" {{action "upload" target="view"}}>
-    <span class='add-upload'><i {{bind-attr class=":fa view.uploadIcon"}}></i></span>
-    {{i18n 'upload'}}
-  </button>
-  <a {{action "closeModal"}}>{{i18n 'cancel'}}</a>
+  {{d-button action="upload" class='btn-primary' icon=uploadIcon label='upload'}}
+  <a href {{action "closeModal"}}>{{i18n 'cancel'}}</a>
   {{#if remote}}<a {{action "toggleShowMore"}} class="pull-right">{{i18n 'show_more'}}</a>{{/if}}
 </div>

app/assets/javascripts/discourse/templates/topic.hbs

@@ -15,9 +15,9 @@
           {{#if editingTopic}}
             {{#if model.isPrivateMessage}}
               <span class="private-message-glyph">{{fa-icon "envelope"}}</span>
-              {{autofocus-text-field id="edit-title" value=buffered.title maxLength=maxTitleLength}}
+              {{autofocus-text-field id="edit-title" value=buffered.title maxlength=siteSettings.max_topic_title_length}}
             {{else}}
-              {{autofocus-text-field id="edit-title" value=buffered.title maxLength=maxTitleLength}}
+              {{autofocus-text-field id="edit-title" value=buffered.title maxlength=siteSettings.max_topic_title_length}}
               <br>
               {{category-chooser valueAttribute="id" value=buffered.category_id source=buffered.category_id}}
             {{/if}}

app/assets/javascripts/discourse/views/composer.js.es6

@@ -1,57 +1,25 @@
-import userSearch from 'discourse/lib/user-search';
 import afterTransition from 'discourse/lib/after-transition';
-import loadScript from 'discourse/lib/load-script';
 import positioningWorkaround from 'discourse/lib/safari-hacks';
-import debounce from 'discourse/lib/debounce';
-import { linkSeenMentions, fetchUnseenMentions } from 'discourse/lib/link-mentions';
 import { headerHeight } from 'discourse/views/header';
-import { showSelector } from 'discourse/lib/emoji/emoji-toolbar';
+import { default as computed, on, observes } from 'ember-addons/ember-computed-decorators';
+import Composer from 'discourse/models/composer';
 
 const ComposerView = Ember.View.extend(Ember.Evented, {
   _lastKeyTimeout: null,
-  templateName: 'composer',
   elementId: 'reply-control',
-  classNameBindings: ['model.creatingPrivateMessage:private-message',
+  classNameBindings: ['composer.creatingPrivateMessage:private-message',
                       'composeState',
-                      'model.loading',
-                      'model.canEditTitle:edit-title',
-                      'postMade',
-                      'model.creatingTopic:topic',
-                      'model.showPreview',
-                      'model.hidePreview'],
+                      'composer.loading',
+                      'composer.canEditTitle:edit-title',
+                      'composer.createdPost:created-post',
+                      'composer.creatingTopic:topic'],
 
-  model: Em.computed.alias('controller.model'),
+  composer: Em.computed.alias('controller.model'),
 
-  // This is just in case something still references content. Can probably be removed
-  content: Em.computed.alias('model'),
-
-  composeState: function() {
-    return this.get('model.composeState') || Discourse.Composer.CLOSED;
-  }.property('model.composeState'),
-
-  // Disable fields when we're loading
-  loadingChanged: function() {
-    if (this.get('loading')) {
-      this.$('.wmd-input, #reply-title').prop('disabled', 'disabled');
-    } else {
-      this.$('.wmd-input, #reply-title').prop('disabled', '');
-    }
-  }.observes('loading'),
-
-  postMade: function() {
-    return !Ember.isEmpty(this.get('model.createdPost')) ? 'created-post' : null;
-  }.property('model.createdPost'),
-
-  refreshPreview: debounce(function() {
-    if (this.editor) {
-      this.editor.refreshPreview();
-    }
-  }, 30),
-
-  observeReplyChanges: function() {
-    if (this.get('model.hidePreview')) return;
-    Ember.run.scheduleOnce('afterRender', this, 'refreshPreview');
-  }.observes('model.reply', 'model.hidePreview'),
+  @computed('composer.composeState')
+  composeState(composeState) {
+    return composeState || Composer.CLOSED;
+  },
 
   movePanels(sizePx) {
     $('#main-outlet').css('padding-bottom', sizePx);
@@ -60,44 +28,41 @@ const ComposerView = Ember.View.extend(Ember.Evented, {
     this.appEvents.trigger("composer:resized");
   },
 
-  resize: function() {
+  @observes('composeState', 'composer.action')
+  resize() {
     Ember.run.scheduleOnce('afterRender', () => {
-      let h = $('#reply-control').height() || 0;
+      const h = $('#reply-control').height() || 0;
       this.movePanels(h + "px");
 
       // Figure out the size of the fields
       const $fields = this.$('.composer-fields');
-      let pos = $fields.position();
-
-      if (pos) {
-        this.$('.wmd-controls').css('top', $fields.height() + pos.top + 5);
+      const fieldPos = $fields.position();
+      if (fieldPos) {
+        this.$('.wmd-controls').css('top', $fields.height() + fieldPos.top + 5);
       }
 
       // get the submit panel height
-      pos = this.$('.submit-panel').position();
-      if (pos) {
-        this.$('.wmd-controls').css('bottom', h - pos.top + 7);
+      const submitPos = this.$('.submit-panel').position();
+      if (submitPos) {
+        this.$('.wmd-controls').css('bottom', h - submitPos.top + 7);
       }
-
     });
-  }.observes('model.composeState', 'model.action'),
+  },
 
   keyUp() {
     const controller = this.get('controller');
     controller.checkReplyLength();
 
-    this.get('controller.model').typing();
+    this.get('composer').typing();
 
     const lastKeyUp = new Date();
-    this.set('lastKeyUp', lastKeyUp);
+    this._lastKeyUp = lastKeyUp;
 
     // One second from now, check to see if the last key was hit when
     // we recorded it. If it was, the user paused typing.
-    const self = this;
-
     Ember.run.cancel(this._lastKeyTimeout);
-    this._lastKeyTimeout = Ember.run.later(function() {
-      if (lastKeyUp !== self.get('lastKeyUp')) return;
+    this._lastKeyTimeout = Ember.run.later(() => {
+      if (lastKeyUp !== this._lastKeyUp) { return; }
 
       // Search for similar topics if the user pauses typing
       controller.findSimilarTopics();
@@ -106,7 +71,6 @@ const ComposerView = Ember.View.extend(Ember.Evented, {
 
   keyDown(e) {
     if (e.which === 27) {
-      // ESC
       this.get('controller').send('hitEsc');
       return false;
     } else if (e.which === 13 && (e.ctrlKey || e.metaKey)) {
@@ -116,557 +80,25 @@ const ComposerView = Ember.View.extend(Ember.Evented, {
     }
   },
 
-  _enableResizing: function() {
+  @on('didInsertElement')
+  _enableResizing() {
     const $replyControl = $('#reply-control');
-
-    const runResize = () => {
-      Ember.run(() => this.resize());
-    };
+    const resize = () => Ember.run(() => this.resize());
 
     $replyControl.DivResizer({
-      maxHeight(winHeight) {
-        return winHeight - headerHeight();
-      },
-      resize: runResize,
-      onDrag: (sizePx) => this.movePanels(sizePx)
+      resize,
+      maxHeight: winHeight => winHeight - headerHeight(),
+      onDrag: sizePx => this.movePanels(sizePx)
     });
 
-    afterTransition($replyControl, runResize);
-    this.set('controller.view', this);
-
+    afterTransition($replyControl, resize);
     positioningWorkaround(this.$());
-  }.on('didInsertElement'),
-
-  _unlinkView: function() {
-    this.set('controller.view', null);
-  }.on('willDestroyElement'),
+  },
 
   click() {
     this.get('controller').send('openIfDraft');
-  },
-
-  // Called after the preview renders. Debounced for performance
-  afterRender() {
-    if (this._state !== "inDOM") { return; }
-
-    const $wmdPreview = this.$('.wmd-preview');
-    if ($wmdPreview.length === 0) return;
-
-    const post = this.get('model.post');
-    let refresh = false;
-
-    // If we are editing a post, we'll refresh its contents once. This is a feature that
-    // allows a user to refresh its contents once.
-    if (post && !post.get('refreshedPost')) {
-      refresh = true;
-      post.set('refreshedPost', true);
   }
-
-    // Load the post processing effects
-    $('a.onebox', $wmdPreview).each(function(i, e) {
-      Discourse.Onebox.load(e, refresh);
-    });
-
-    const unseen = linkSeenMentions($wmdPreview, this.siteSettings);
-    if (unseen.length) {
-      Ember.run.debounce(this, this._renderUnseen, $wmdPreview, unseen, 500);
-    }
-
-    this.trigger('previewRefreshed', $wmdPreview);
-  },
-
-  _renderUnseen: function($wmdPreview, unseen) {
-    fetchUnseenMentions($wmdPreview, unseen, this.siteSettings).then(() => {
-      linkSeenMentions($wmdPreview, this.siteSettings);
-      this.trigger('previewRefreshed', $wmdPreview);
-    });
-  },
-
-  _applyEmojiAutocomplete() {
-    if (!this.siteSettings.enable_emoji) { return; }
-
-    const container = this.container;
-    const template = container.lookup('template:emoji-selector-autocomplete.raw');
-    const controller = this.get('controller');
-
-    this.$('.wmd-input').autocomplete({
-      template: template,
-      key: ":",
-
-      transformComplete(v) {
-        if (v.code) {
-          return `${v.code}:`;
-        } else {
-          showSelector({
-            container,
-            onSelect(title) {
-              controller.appendTextAtCursor(title + ':', {space: false});
-            }
-          });
-          return "";
-        }
-      },
-
-      dataSource(term) {
-        return new Ember.RSVP.Promise(resolve => {
-          const full = `:${term}`;
-          term = term.toLowerCase();
-
-          if (term === "") {
-            return resolve(["smile", "smiley", "wink", "sunny", "blush"]);
-          }
-
-          if (Discourse.Emoji.translations[full]) {
-            return resolve([Discourse.Emoji.translations[full]]);
-          }
-
-          const options = Discourse.Emoji.search(term, {maxResults: 5});
-
-          return resolve(options);
-        }).then(list => list.map(code => {
-          return {code, src: Discourse.Emoji.urlFor(code)};
-        })).then(list => {
-          if (list.length) {
-            list.push({ label: I18n.t("composer.more_emoji") });
-          }
-          return list;
-        });
-      }
-    });
-  },
-
-  initEditor() {
-    // not quite right, need a callback to pass in, meaning this gets called once,
-    // but if you start replying to another topic it will get the avatars wrong
-    let $wmdInput;
-    const self = this;
-    const controller = this.get('controller');
-
-    this.wmdInput = $wmdInput = this.$('.wmd-input');
-    if ($wmdInput.length === 0 || $wmdInput.data('init') === true) return;
-
-    loadScript('defer/html-sanitizer-bundle');
-    ComposerView.trigger("initWmdEditor");
-    this._applyEmojiAutocomplete();
-
-    const template = this.container.lookup('template:user-selector-autocomplete.raw');
-    $wmdInput.data('init', true);
-    $wmdInput.autocomplete({
-      template: template,
-      dataSource(term) {
-        return userSearch({
-          term: term,
-          topicId: controller.get('controllers.topic.model.id'),
-          includeGroups: true
-        });
-      },
-      key: "@",
-      transformComplete(v) {
-        return v.username ? v.username : v.usernames.join(", @");
-      }
-    });
-
-
-    const options = {
-      containerElement: this.element,
-      lookupAvatarByPostNumber(postNumber, topicId) {
-        const posts = controller.get('controllers.topic.model.postStream.posts');
-        if (posts && topicId === controller.get('controllers.topic.model.id')) {
-          const quotedPost = posts.findProperty("post_number", postNumber);
-          if (quotedPost) {
-            return Discourse.Utilities.tinyAvatar(quotedPost.get('avatar_template'));
-          }
-        }
-      }
-    };
-
-    const showOptions = controller.get('canWhisper');
-    if (showOptions) {
-      options.appendButtons = [{
-        id: 'wmd-composer-options',
-        description: I18n.t("composer.options"),
-        execute() {
-          const toolbarPos = self.$('.wmd-controls').position();
-          const pos = self.$('.wmd-composer-options').position();
-
-          const location = {
-            position: "absolute",
-            left: toolbarPos.left + pos.left,
-            top: toolbarPos.top + pos.top,
-          };
-          controller.send('showOptions', location);
-        }
-      }];
-    }
-
-    this.editor = Discourse.Markdown.createEditor(options);
-
-    // HACK to change the upload icon of the composer's toolbar
-    if (!Discourse.Utilities.allowsAttachments()) {
-      Em.run.scheduleOnce("afterRender", function() {
-        $("#wmd-image-button").addClass("image-only");
-      });
-    }
-
-    this.editor.hooks.insertImageDialog = function(callback) {
-      callback(null);
-      controller.send('showUploadSelector', self);
-      return true;
-    };
-
-    this.editor.hooks.onPreviewRefresh = function() {
-      return self.afterRender();
-    };
-
-    this.editor.run();
-    this.set('editor', this.editor);
-    this.loadingChanged();
-
-    const saveDraft = debounce((function() {
-      return controller.saveDraft();
-    }), 2000);
-
-    $wmdInput.keyup(function() {
-      saveDraft();
-      return true;
-    });
-
-    const $replyTitle = $('#reply-title');
-
-    $replyTitle.keyup(function() {
-      saveDraft();
-      // removes the red background once the requirements are met
-      if (self.get('model.missingTitleCharacters') <= 0) {
-        $replyTitle.removeClass("requirements-not-met");
-      }
-      return true;
-    });
-
-    // when the title field loses the focus...
-    $replyTitle.blur(function(){
-      // ...and the requirements are not met (ie. the minimum number of characters)
-      if (self.get('model.missingTitleCharacters') > 0) {
-        // then, "redify" the background
-        $replyTitle.toggleClass("requirements-not-met", true);
-      }
-    });
-
-    // in case it's still bound somehow
-    this._unbindUploadTarget();
-
-    const $uploadTarget = $("#reply-control"),
-          csrf = Discourse.Session.currentProp("csrfToken"),
-          reset = () => this.setProperties({ uploadProgress: 0, isUploading: false });
-
-    var cancelledByTheUser;
-
-    this.messageBus.subscribe("/uploads/composer", upload => {
-      // reset upload state
-      reset();
-      // replace upload placeholder
-      if (upload && upload.url) {
-        if (!cancelledByTheUser) {
-          const uploadPlaceholder = Discourse.Utilities.getUploadPlaceholder(),
-                markdown = Discourse.Utilities.getUploadMarkdown(upload);
-          this.replaceMarkdown(uploadPlaceholder, markdown);
-        }
-      } else {
-        Discourse.Utilities.displayErrorForUpload(upload);
-      }
-    });
-
-    $uploadTarget.fileupload({
-      url: Discourse.getURL("/uploads.json?client_id=" + this.messageBus.clientId + "&authenticity_token=" + encodeURIComponent(csrf)),
-      dataType: "json",
-      pasteZone: $uploadTarget,
-    });
-
-    $uploadTarget.on("fileuploadsubmit", (e, data) => {
-      const isValid = Discourse.Utilities.validateUploadedFiles(data.files);
-      data.formData = { type: "composer" };
-      this.setProperties({ uploadProgress: 0, isUploading: isValid });
-      return isValid;
-    });
-
-    $uploadTarget.on("fileuploadsend", (e, data) => {
-      // hide the "file selector" modal
-      controller.send("closeModal");
-      // deal with cancellation
-      cancelledByTheUser = false;
-      // add upload placeholder
-      const uploadPlaceholder = Discourse.Utilities.getUploadPlaceholder();
-      this.addMarkdown(uploadPlaceholder);
-
-      if (data["xhr"]) {
-        const jqHXR = data.xhr();
-        if (jqHXR) {
-          // need to wait for the link to show up in the DOM
-          Em.run.schedule("afterRender", () => {
-            const $cancel = $("#cancel-file-upload");
-            $cancel.on("click", () => {
-              if (jqHXR) {
-                // signal the upload was cancelled by the user
-                cancelledByTheUser = true;
-                // immediately remove upload placeholder
-                this.replaceMarkdown(uploadPlaceholder, "");
-                // might trigger a "fileuploadfail" event with status = 0
-                jqHXR.abort();
-                // make sure we always reset the uploading status
-                reset();
-              }
-              // unbind
-              $cancel.off("click");
-            });
-          });
-        }
-      }
-    });
-
-    $uploadTarget.on("fileuploadprogressall", (e, data) => {
-      const progress = parseInt(data.loaded / data.total * 100, 10);
-      this.set("uploadProgress", progress);
-    });
-
-    $uploadTarget.on("fileuploadfail", (e, data) => {
-      // reset upload state
-      reset();
-
-      if (!cancelledByTheUser) {
-        // remove upload placeholder when there's a failure
-        const uploadPlaceholder = Discourse.Utilities.getUploadPlaceholder();
-        this.replaceMarkdown(uploadPlaceholder, "");
-        // display the error
-        Discourse.Utilities.displayErrorForUpload(data);
-      }
-    });
-
-    // contenteditable div hack for getting image paste to upload working in
-    // Firefox. This is pretty dangerous because it can potentially break
-    // Ctrl+v to paste so we should be conservative about what browsers this runs
-    // in.
-    const uaMatch = navigator.userAgent.match(/Firefox\/(\d+)\.\d/);
-    if (uaMatch && parseInt(uaMatch[1]) >= 24) {
-      self.$().append( Ember.$("<div id='contenteditable' contenteditable='true' style='height: 0; width: 0; overflow: hidden'></div>") );
-      self.$("textarea").off('keydown.contenteditable');
-      self.$("textarea").on('keydown.contenteditable', function(event) {
-        // Catch Ctrl+v / Cmd+v and hijack focus to a contenteditable div. We can't
-        // use the onpaste event because for some reason the paste isn't resumed
-        // after we switch focus, probably because it is being executed too late.
-        if ((event.ctrlKey || event.metaKey) && (event.keyCode === 86)) {
-          // Save the current textarea selection.
-          const textarea = self.$("textarea")[0],
-              selectionStart = textarea.selectionStart,
-              selectionEnd   = textarea.selectionEnd;
-
-          // Focus the contenteditable div.
-          const contentEditableDiv = self.$('#contenteditable');
-          contentEditableDiv.focus();
-
-          // The paste doesn't finish immediately and we don't have any onpaste
-          // event, so wait for 100ms which _should_ be enough time.
-          setTimeout(function() {
-            const pastedImg  = contentEditableDiv.find('img');
-
-            if ( pastedImg.length === 1 ) {
-              pastedImg.remove();
-            }
-
-            // For restoring the selection.
-            textarea.focus();
-            const textareaContent = $(textarea).val(),
-                startContent = textareaContent.substring(0, selectionStart),
-                endContent = textareaContent.substring(selectionEnd);
-
-            const restoreSelection = function(pastedText) {
-              $(textarea).val( startContent + pastedText + endContent );
-              textarea.selectionStart = selectionStart + pastedText.length;
-              textarea.selectionEnd = textarea.selectionStart;
-            };
-
-            if (contentEditableDiv.html().length > 0) {
-              // If the image wasn't the only pasted content we just give up and
-              // fall back to the original pasted text.
-              contentEditableDiv.find("br").replaceWith("\n");
-              restoreSelection(contentEditableDiv.text());
-            } else {
-              // Depending on how the image is pasted in, we may get either a
-              // normal URL or a data URI. If we get a data URI we can convert it
-              // to a Blob and upload that, but if it is a regular URL that
-              // operation is prevented for security purposes. When we get a regular
-              // URL let's just create an <img> tag for the image.
-              const imageSrc = pastedImg.attr('src');
-
-              if (imageSrc.match(/^data:image/)) {
-                // Restore the cursor position, and remove any selected text.
-                restoreSelection("");
-
-                // Create a Blob to upload.
-                const image = new Image();
-                image.onload = function() {
-                  // Create a new canvas.
-                  const canvas = document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
-                  canvas.height = image.height;
-                  canvas.width = image.width;
-                  const ctx = canvas.getContext('2d');
-                  ctx.drawImage(image, 0, 0);
-
-                  canvas.toBlob(function(blob) {
-                    $uploadTarget.fileupload('add', {files: blob});
-                  });
-                };
-                image.src = imageSrc;
-              } else {
-                restoreSelection("<img src='" + imageSrc + "'>");
-              }
-            }
-
-            contentEditableDiv.html('');
-          }, 100);
-        }
-      });
-    }
-
-    if (Discourse.Mobile.mobileView) {
-      $(".mobile-file-upload").on("click.uploader", function () {
-        // redirect the click on the hidden file input
-        $("#mobile-uploader").click();
-      });
-    }
-
-    // need to wait a bit for the "slide up" transition of the composer
-    // we could use .on("transitionend") but it's not firing when the transition isn't completed :(
-    Em.run.later(function() {
-      self.resize();
-      self.refreshPreview();
-      if ($replyTitle.length) {
-        $replyTitle.putCursorAtEnd();
-      } else {
-        $wmdInput.putCursorAtEnd();
-      }
-      self.appEvents.trigger("composer:opened");
-    }, 400);
-  },
-
-  addMarkdown(text) {
-    const ctrl = this.$('.wmd-input').get(0),
-          reply = this.get('model.reply'),
-          caretPosition = Discourse.Utilities.caretPosition(ctrl);
-
-    this.set('model.reply', reply.substring(0, caretPosition) + text + reply.substring(caretPosition, reply.length));
-
-    Em.run.schedule('afterRender', () => Discourse.Utilities.setCaretPosition(ctrl, caretPosition + text.length));
-  },
-
-  replaceMarkdown(old, text) {
-    const ctrl = this.$(".wmd-input").get(0),
-          reply = this.get("model.reply"),
-          beforeCaretPosition = Discourse.Utilities.caretPosition(ctrl),
-          afterCaretPosition = beforeCaretPosition <= reply.indexOf(old) ? beforeCaretPosition :  beforeCaretPosition - old.length + text.length;
-
-    this.set("model.reply", reply.replace(old, text));
-
-    Ember.run.schedule("afterRender", () => Discourse.Utilities.setCaretPosition(ctrl, afterCaretPosition));
-  },
-
-  // Uses javascript to get the image sizes from the preview, if present
-  imageSizes() {
-    const result = {};
-    this.$('.wmd-preview img').each(function(i, e) {
-      const $img = $(e),
-          src = $img.prop('src');
-
-      if (src && src.length) {
-        result[src] = { width: $img.width(), height: $img.height() };
-      }
-    });
-    return result;
-  },
-
-  childDidInsertElement() {
-    this.initEditor();
-
-    // Disable links in the preview
-    this.$('.wmd-preview').on('click.preview', (e) => {
-      e.preventDefault();
-      return false;
-    });
-  },
-
-  childWillDestroyElement() {
-    this._unbindUploadTarget();
-
-    this.$('.wmd-preview').off('click.preview');
-
-    const self = this;
-
-    Em.run.next(() => {
-      $('#main-outlet').css('padding-bottom', 0);
-      // need to wait a bit for the "slide down" transition of the composer
-      Em.run.later(() => {
-        if (self.get('composeState') !== Discourse.Composer.CLOSED) {
-          $('#main-outlet').css('padding-bottom', $('#reply-control').height());
-        }
-
-        this.appEvents.trigger("composer:closed");
-      }, 400);
-    });
-  },
-
-  _unbindUploadTarget() {
-    this.messageBus.unsubscribe("/uploads/composer");
-    const $uploadTarget = $("#reply-control");
-    try { $uploadTarget.fileupload("destroy"); }
-    catch (e) { /* wasn't initialized yet */ }
-    $uploadTarget.off();
-  },
-
-  titleValidation: function() {
-    const titleLength = this.get('model.titleLength'),
-        missingChars = this.get('model.missingTitleCharacters');
-    let reason;
-    if( titleLength < 1 ){
-      reason = I18n.t('composer.error.title_missing');
-    } else if( missingChars > 0 ) {
-      reason = I18n.t('composer.error.title_too_short', {min: this.get('model.minimumTitleLength')});
-    } else if( titleLength > Discourse.SiteSettings.max_topic_title_length ) {
-      reason = I18n.t('composer.error.title_too_long', {max: Discourse.SiteSettings.max_topic_title_length});
-    }
-
-    if( reason ) {
-      return Discourse.InputValidation.create({ failed: true, reason: reason });
-    }
-  }.property('model.titleLength', 'model.missingTitleCharacters', 'model.minimumTitleLength'),
-
-  categoryValidation: function() {
-    if( !Discourse.SiteSettings.allow_uncategorized_topics && !this.get('model.categoryId')) {
-      return Discourse.InputValidation.create({ failed: true, reason: I18n.t('composer.error.category_missing') });
-    }
-  }.property('model.categoryId'),
-
-  replyValidation: function() {
-    const postType = this.get('model.post.post_type');
-    if (postType === this.site.get('post_types.small_action')) { return; }
-
-    const replyLength = this.get('model.replyLength'),
-          missingChars = this.get('model.missingReplyCharacters');
-
-    let reason;
-    if (replyLength < 1) {
-      reason = I18n.t('composer.error.post_missing');
-    } else if (missingChars > 0) {
-      reason = I18n.t('composer.error.post_length', {min: this.get('model.minimumPostLength')});
-      const tl = Discourse.User.currentProp("trust_level");
-      if (tl === 0 || tl === 1) {
-        reason += "<br/>" + I18n.t('composer.error.try_like');
-      }
-    }
-
-    if (reason) {
-      return Discourse.InputValidation.create({ failed: true, reason });
-    }
-  }.property('model.reply', 'model.replyLength', 'model.missingReplyCharacters', 'model.minimumPostLength'),
 });
 
 RSVP.EventTarget.mixin(ComposerView);
-
 export default ComposerView;

app/assets/javascripts/discourse/views/quote-button.js.es6

@@ -36,9 +36,8 @@ export default Ember.View.extend({
     // the quote reply widget
     //
     // Same hack applied to Android cause it has unreliable touchend
-    const caps = this.capabilities;
-    const android = caps.get('android');
-    if (caps.get('winphone') || android) {
+    const isAndroid = this.capabilities.isAndroid;
+    if (this.capabilities.isWinphone || isAndroid) {
       onSelectionChanged = _.debounce(onSelectionChanged, 500);
     }
 
@@ -72,7 +71,7 @@ export default Ember.View.extend({
 
       // Android is dodgy, touchend often will not fire
       // https://code.google.com/p/android/issues/detail?id=19827
-      if (!android) {
+      if (!isAndroid) {
         $(document)
           .on('touchstart.quote-button', function(){
             view.set('isTouchInProgress', true);

app/assets/javascripts/discourse/views/topic-map-container.js.es6

@@ -1,5 +1,5 @@
 import ContainerView from 'discourse/views/container';
-import { default as property, observes, on } from 'ember-addons/ember-computed-decorators';
+import { default as computed, observes, on } from 'ember-addons/ember-computed-decorators';
 
 export default ContainerView.extend({
   classNameBindings: ['hidden', ':topic-map'],
@@ -9,7 +9,7 @@ export default ContainerView.extend({
     Ember.run.once(this, 'rerender');
   },
 
-  @property
+  @computed
   hidden() {
     if (!this.get('post.firstPost')) return true;
 

app/assets/javascripts/discourse/views/topic-progress.js.es6

@@ -76,7 +76,7 @@ export default Ember.View.extend({
   _focusWhenOpened: function() {
 
     // Don't focus on mobile or touch
-    if (Discourse.Mobile.mobileView || this.capabilities.get('touch')) {
+    if (Discourse.Mobile.mobileView || this.capabilities.touch) {
       return;
     }
 

app/assets/javascripts/discourse/views/upload-selector.js.es6

@@ -1,74 +1,33 @@
 import ModalBodyView from "discourse/views/modal-body";
+import { default as computed, on, observes } from 'ember-addons/ember-computed-decorators';
+import { uploadTranslate } from 'discourse/controllers/upload-selector';
 
-function uploadTranslate(key, options) {
-  const opts = options || {};
-  if (Discourse.Utilities.allowsAttachments()) { key += "_with_attachments"; }
-  return I18n.t("upload_selector." + key, opts);
-}
 
 export default ModalBodyView.extend({
-  templateName: 'modal/upload_selector',
+  templateName: 'modal/upload-selector',
   classNames: ['upload-selector'],
 
-  // cf. http://stackoverflow.com/a/9851769/11983
-  isOpera: !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0,
-  isFirefox: typeof InstallTrigger !== 'undefined',
-  isSafari: Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0,
-  isChrome: !!window.chrome && !this.isOpera,
+  @computed()
+  title() {
+    return uploadTranslate("title");
+  },
 
-  title: function() { return uploadTranslate("title"); }.property(),
-  uploadIcon: function() { return Discourse.Utilities.allowsAttachments() ? "fa-upload" : "fa-picture-o"; }.property(),
-
-  touchStart: function(evt) {
+  touchStart(evt) {
     // HACK: workaround Safari iOS being really weird and not shipping click events
-    if (this.isSafari && evt.target.id === "filename-input") {
+    if (this.capabilities.isSafari && evt.target.id === "filename-input") {
       this.$('#filename-input').click();
     }
   },
 
-  tip: function() {
-    const source = this.get("controller.local") ? "local" : "remote";
-    const authorized_extensions = Discourse.Utilities.authorizesAllExtensions() ? "" : `(${Discourse.Utilities.authorizedExtensions()})`;
-    return uploadTranslate(source + "_tip", { authorized_extensions });
-  }.property("controller.local"),
-
-  hint: function() {
-    const isSupported = this.isChrome || this.isFirefox;
-    // chrome is the only browser that support copy & paste of images.
-    return I18n.t("upload_selector.hint" + (isSupported ? "_for_supported_browsers" : ""));
-  }.property(),
-
-  _selectOnInsert: function() {
-    this.selectedChanged();
-  }.on('didInsertElement'),
-
-  selectedChanged: function() {
-    const self = this;
-    Em.run.next(function() {
+  @on('didInsertElement')
+  @observes('controller.local')
+  selectedChanged() {
+    Ember.run.next(() => {
       // *HACK* to select the proper radio button
-      var value = self.get('controller.local') ? 'local' : 'remote';
+      const value = this.get('controller.local') ? 'local' : 'remote';
       $('input:radio[name="upload"]').val([value]);
-      // focus the input
       $('.inputs input:first').focus();
     });
-  }.observes('controller.local'),
-
-  actions: {
-    upload: function() {
-      if (this.get("controller.local")) {
-        $('#reply-control').fileupload('add', { fileInput: $('#filename-input') });
-      } else {
-        const imageUrl = $('#fileurl-input').val(),
-              imageLink = $('#link-input').val(),
-              composerView = this.get('controller.composerView');
-        if (this.get("controller.showMore") && imageLink.length > 3) {
-          composerView.addMarkdown("[![](" + imageUrl +")](" + imageLink + ")");
-        } else {
-          composerView.addMarkdown(imageUrl);
-        }
-        this.get('controller').send('closeModal');
-      }
-    }
   }
 
 });

app/assets/javascripts/main_include.js

@@ -1,9 +1,6 @@
 //= require ./discourse/mixins/ajax
 //= require ./discourse
 
-// Pagedown customizations
-//= require ./pagedown_custom.js
-
 // Stuff we need to load first
 //= require_tree ./ember-addons/utils
 //= require ./ember-addons/decorator-alias
@@ -77,6 +74,7 @@
 //= require ./discourse/lib/emoji/emoji
 //= require ./discourse/lib/emoji/emoji-groups
 //= require ./discourse/lib/emoji/emoji-toolbar
+//= require ./discourse/components/d-editor
 //= require ./discourse/views/composer
 //= require ./discourse/lib/show-modal
 //= require ./discourse/lib/screen-track

app/assets/javascripts/pagedown_custom.js

@@ -1,37 +0,0 @@
-window.PagedownCustom = {
-  insertButtons: [
-    {
-      id: 'wmd-quote-post',
-      description: I18n.t("composer.quote_post_title"),
-      execute: function() {
-        return Discourse.__container__.lookup('controller:composer').send('importQuote');
-      }
-    }
-  ],
-
-  appendButtons: [],
-
-  customActions: {
-    "doBlockquote": function(chunk, postProcessing, oldDoBlockquote) {
-
-      // When traditional linebreaks are set, use the default Pagedown implementation
-      if (Discourse.SiteSettings.traditional_markdown_linebreaks) {
-        return oldDoBlockquote.call(this, chunk, postProcessing);
-      }
-
-      // Our custom blockquote for non-traditional markdown linebreaks
-      var result = [];
-      chunk.selection.split(/\n/).forEach(function (line) {
-        var newLine = "";
-        if (line.indexOf("> ") === 0) {
-          newLine += line.substr(2);
-        } else {
-          if (/\S/.test(line)) { newLine += "> " + line; }
-        }
-        result.push(newLine);
-      });
-      chunk.selection = result.join("\n");
-
-    }
-  }
-};

app/assets/stylesheets/common/admin/admin_base.scss

@@ -1188,7 +1188,7 @@ table.api-keys {
     height: 200px;
   }
 
-  .wmd-input {
+  .d-editor-input {
     width: 98%;
     height: 200px;
   }

app/assets/stylesheets/common/base/compose.scss

@@ -38,7 +38,7 @@
   }
 }
 
-.textarea-wrapper .spinner {
+.d-editor-textarea-wrapper .spinner {
   z-index: 1000;
   margin-top: 5em;
 }
@@ -99,10 +99,6 @@ div.ac-wrap {
   }
 }
 
-#reply-control.topic #wmd-quote-post {
-  display: none;
-}
-
 .auto-close-fields {
   div:not(:first-child) {
     margin-top: 10px;
@@ -175,7 +171,7 @@ div.ac-wrap {
 
 // this removes the topmost margin from the first element in the topic post
 // if we don't do this, all posts would have extra space at the top
-.wmd-preview > *:first-child {
+.d-editor-preview > *:first-child {
   margin-top: 0;
 }
 .cooked > *:first-child {

app/assets/stylesheets/common/base/discourse.scss

@@ -149,7 +149,7 @@ body {
     background-color: dark-light-choose(scale-color($danger, $lightness: 80%), scale-color($danger, $lightness: -60%));
   }
 
-  .wmd-input {
+  .d-editor-input {
     resize: none;
   }
 

app/assets/stylesheets/common/base/pagedown.scss

@@ -1,145 +0,0 @@
-// styles that apply to the PageDown editor
-// http://code.google.com/p/pagedown/
-
-.wmd-panel {
-  margin-left: 25%;
-  margin-right: 25%;
-  width: 50%;
-  min-width: 500px;
-}
-
-.wmd-button-bar {
-  width: 100%;
-}
-
-.wmd-button-row {
-  margin: 5px;
-  padding: 0;
-  height: 20px;
-  overflow: hidden;
-}
-
-.wmd-spacer {
-  width: 1px;
-  height: 20px;
-  margin-right: 8px;
-  margin-left: 5px;
-  background-color: dark-light-diff($primary, $secondary, 90%, -60%);
-  display: inline-block;
-  float: left;
-}
-
-.wmd-button {
-  margin-right: 5px;
-  border: 0;
-  position: relative;
-  float: left;
-  font-family: FontAwesome;
-  font-weight: normal;
-  font-style: normal;
-  text-decoration: inherit;
-  display: inline;
-  width: auto;
-  height: auto;
-  line-height: normal;
-  vertical-align: baseline;
-  background-image: none !important;
-  background-position: 0 0;
-  background-repeat: repeat;
-  background: transparent;
-  padding: 4px;
-}
-
-.wmd-button:hover {
-  background-color: dark-light-diff($primary, $secondary, 90%, -60%);
-}
-
-
-.wmd-bold-button:before {
-  content: "\f032";
-}
-
-.wmd-italic-button:before {
-  content: "\f033";
-}
-
-.wmd-link-button:before {
-  content: "\f0c1";
-}
-
-.wmd-quote-button:before {
-  content: "\f10e";
-}
-
-.wmd-code-button:before {
-  content: "\f121";
-}
-
-.wmd-image-button:before {
-  content: "\f093";
-}
-
-.wmd-image-button.image-only:before {
-  content: "\f03e";
-}
-
-.wmd-olist-button:before {
-  content: "\f0cb";
-}
-
-.wmd-ulist-button:before {
-  content: "\f0ca";
-}
-
-.wmd-heading-button:before {
-  content:  "\f031";
-}
-
-.wmd-hr-button:before {
-  content:  "\f068";
-}
-
-.wmd-undo-button:before {
-  content:  "\f0e2";
-}
-
-.wmd-redo-button:before {
-  content:  "\f01e";
-}
-
-.wmd-quote-post:before {
-  content:  "\f0e5";
-}
-
-.wmd-composer-options:before {
-  content:  "\f013";
-}
-
-.wmd-prompt-background {
-  background-color: #111;
-  box-shadow: 0 3px 7px rgba(0,0,0, .8);
-}
-
-.wmd-prompt-dialog {
-  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-  background-color: dark-light-diff($primary, $secondary, 90%, -60%);
-}
-
-.wmd-prompt-dialog > div {
-  font-size: 0.8em;
-  font-family: arial, helvetica, sans-serif;
-}
-
-.wmd-prompt-dialog > form > input[type="text"] {
-  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-  color: $primary;
-}
-
-.wmd-prompt-dialog > form > input[type="button"] {
-  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-  background: dark-light-choose(initial, blend-primary-secondary(50%));
-  color: dark-light-choose(inherit, $secondary);
-  font-family: trebuchet MS, helvetica, sans-serif;
-  font-size: 0.8em;
-  font-weight: bold;
-}

app/assets/stylesheets/common/base/topic-post.scss

@@ -26,7 +26,7 @@
 }
 
 // global styles for the cooked HTML content in posts (and preview)
-.cooked, .wmd-preview {
+.cooked, .d-editor-preview {
   word-wrap: break-word;
   h1, h2, h3, h4, h5, h6 { margin: 30px 0 10px; }
   h1 { line-height: 1em; } /* normalize.css sets h1 font size but not line height */
@@ -36,7 +36,7 @@
 }
 
 
-.cooked, .wmd-preview {
+.cooked, .d-editor-preview {
   video {
     max-width: 100%;
   }

app/assets/stylesheets/desktop/compose.scss

@@ -278,14 +278,14 @@
         background-color: dark-light-diff($primary, $secondary, 90%, -60%);
       }
     }
-    .wmd-input:disabled {
+    .d-editor-input:disabled {
       background-color: dark-light-diff($primary, $secondary, 90%, -60%);
     }
-    .wmd-input, .wmd-preview {
+    .d-editor-input, .d-editor-preview {
       color: $primary;
     }
 
-    .wmd-preview {
+    .d-editor-preview {
       border: 1px dashed dark-light-diff($primary, $secondary, 90%, -60%);
       overflow: auto;
       visibility: visible;
@@ -303,7 +303,7 @@
         visibility: hidden;
       }
     }
-    .wmd-input {
+    .d-editor-input {
       bottom: 35px;
     }
 
@@ -351,19 +351,18 @@
 }
 
 #reply-control {
-  &.hide-preview {
-    .wmd-controls {
-      .wmd-input {
+  .wmd-controls.hide-preview {
+    .d-editor-input {
       width: 100%;
     }
-      .preview-wrapper {
+    .d-editor-preview-wrapper {
       display: none;
     }
-      .textarea-wrapper {
+    .d-editor-textarea-wrapper {
       width: 100%;
     }
   }
-  }
+
   .wmd-controls {
     left: 30px;
     right: 30px;
@@ -372,7 +371,7 @@
     top: 50px;
 
 
-    .wmd-input, .wmd-preview-scroller, .wmd-preview {
+    .d-editor-input, .d-editor-preview {
       -moz-box-sizing: border-box;
       box-sizing: border-box;
       width: 100%;
@@ -383,7 +382,7 @@
       background-color: $secondary;
       word-wrap: break-word;
     }
-    .wmd-input, .wmd-preview-scroller {
+    .d-editor-input, .d-editor-preview-header {
       position: absolute;
       left: 0;
       top: 0;
@@ -391,18 +390,17 @@
       border-top: 30px solid transparent;
       @include border-radius-all(0);
     }
-    .wmd-preview-scroller {
+    .d-editor-preview-header {
       font-size: 0.929em;
       line-height: 18px;
       font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
       overflow: scroll;
-      visibility: hidden;
       .marker, .caret {
         display: inline-block;
         vertical-align: top;
       }
     }
-    .textarea-wrapper, .preview-wrapper {
+    .d-editor, .d-editor-container, .d-editor-textarea-wrapper, .d-editor-preview-wrapper {
       position: relative;
       -moz-box-sizing: border-box;
       box-sizing: border-box;
@@ -410,9 +408,9 @@
       min-height: 100%;
       margin: 0;
       padding: 0;
-      width: 50%;
     }
-    .textarea-wrapper {
+    .d-editor-textarea-wrapper {
+      width: 50%;
       padding-right: 5px;
       float: left;
       .popup-tip {
@@ -420,12 +418,13 @@
         right: 4px;
       }
     }
-    .preview-wrapper {
+    .d-editor-preview-wrapper {
+      width: 50%;
       padding-left: 5px;
       float: right;
     }
   }
-  .wmd-button-bar {
+  .d-editor-button-bar {
     top: 0;
     position: absolute;
     border-bottom: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);

app/assets/stylesheets/desktop/queued-posts.scss

@@ -18,7 +18,7 @@
       width: $topic-body-width;
       float: left;
 
-      .wmd-input {
+      .d-editor-input {
         width: 98%;
         height: 15em;
       }

app/assets/stylesheets/desktop/user.scss

@@ -39,10 +39,6 @@
     }
   }
 
-  .bio-composer #wmd-quote-post {
-    display: none;
-  }
-
   .static {
     color: $primary;
     display: inline-block;

app/assets/stylesheets/mobile/compose.scss

@@ -163,13 +163,13 @@ input {
         background-color: dark-light-choose(scale-color($primary, $lightness: 75%), scale-color($secondary, $lightness: 25%));
       }
     }
-    .wmd-input:disabled {
+    .d-editor-input:disabled {
       background-color: dark-light-choose(scale-color($primary, $lightness: 75%), scale-color($secondary, $lightness: 25%));
     }
-    .wmd-input {
+    .d-editor-input {
       color: dark-light-choose(darken($primary, 40%), blend-primary-secondary(90%));
     }
-    .wmd-input {
+    .d-editor-input {
       bottom: 35px;
     }
     .submit-panel {
@@ -196,7 +196,7 @@ input {
     width: 240px;
     right: 5px;
   }
-  .textarea-wrapper .popup-tip {
+  .d-editor-textarea-wrapper .popup-tip {
     top: 28px;
   }
   button.btn.no-text {
@@ -221,23 +221,22 @@ input {
     top: 40px;
     bottom: 50px;
     display: block;
-
-    .wmd-input {
+    .d-editor-container {
+      padding: 0;
+    }
+    .d-editor-preview-wrapper {
+      display: none;
+    }
+    .d-editor-input {
       width: 100%;
-      height: 100%;
-      min-height: 100%;
+      height: 180px;
       padding: 7px;
       margin: 0;
       background-color: $secondary;
       word-wrap: break-word;
       box-sizing: border-box;
     }
-    .wmd-input {
-      position: absolute;
-      left: 0;
-      top: 0;
-    }
-    .textarea-wrapper {
+    .d-editor-textarea-wrapper {
       position: relative;
       box-sizing: border-box;
       height: 100%;
@@ -250,7 +249,7 @@ input {
       }
     }
   }
-  .wmd-button-bar {
+  .d-editor-button-bar {
     display: none;
   }
 }

app/assets/stylesheets/mobile/user.scss

@@ -63,10 +63,6 @@
     padding: 5px 8px;
   }
 
-  .bio-composer #wmd-quote-post {
-    display: none;
-  }
-
   textarea {width: 100%;}
 }
 
@@ -99,10 +95,6 @@
     }
   }
 
-  .bio-composer #wmd-quote-post {
-    display: none;
-  }
-
   .static {
     color: $primary;
     display: inline-block;

spec/phantom_js/smoke_test.js

@@ -179,12 +179,12 @@ var runTests = function() {
 
     $("#create-topic").click();
     $("#reply-title").val(title).trigger("change");
-    $("#reply-control .wmd-input").val(post).trigger("change");
-    $("#reply-control .wmd-input").focus()[0].setSelectionRange(post.length, post.length);
+    $("#reply-control .d-editor-input").val(post).trigger("change");
+    $("#reply-control .d-editor-input").focus()[0].setSelectionRange(post.length, post.length);
   });
 
   exec("open upload modal", function() {
-    $(".wmd-image-button").click();
+    $(".d-editor-button-bar .upload").click();
   });
 
   test("upload modal is open", function() {
@@ -214,16 +214,16 @@ var runTests = function() {
   });
 
   test("composer is open", function() {
-    return document.querySelector("#reply-control .wmd-input");
+    return document.querySelector("#reply-control .d-editor-input");
   });
 
   exec("compose reply", function() {
     var post = "I can even write a reply inside the smoke test ;) (" + (+new Date()) + ")";
-    $("#reply-control .wmd-input").val(post).trigger("change");
+    $("#reply-control .d-editor-input").val(post).trigger("change");
   });
 
   test("waiting for the preview", function() {
-    return $(".wmd-preview").text().trim().indexOf("I can even write") === 0;
+    return $(".d-editor-preview").text().trim().indexOf("I can even write") === 0;
   });
 
   execAsync("submit the reply", 6000, function() {

test/javascripts/acceptance/composer-test.js.es6

@@ -10,25 +10,25 @@ test("Tests the Composer controls", () => {
 
   click('#create-topic');
   andThen(() => {
-    ok(exists('.wmd-input'), 'the composer input is visible');
+    ok(exists('.d-editor-input'), 'the composer input is visible');
     ok(exists('.title-input .popup-tip.bad.hide'), 'title errors are hidden by default');
-    ok(exists('.textarea-wrapper .popup-tip.bad.hide'), 'body errors are hidden by default');
+    ok(exists('.d-editor-textarea-wrapper .popup-tip.bad.hide'), 'body errors are hidden by default');
   });
 
   click('a.toggle-preview');
   andThen(() => {
-    ok(!exists('.wmd-preview:visible'), "clicking the toggle hides the preview");
+    ok(!exists('.d-editor-preview:visible'), "clicking the toggle hides the preview");
   });
 
   click('a.toggle-preview');
   andThen(() => {
-    ok(exists('.wmd-preview:visible'), "clicking the toggle shows the preview again");
+    ok(exists('.d-editor-preview:visible'), "clicking the toggle shows the preview again");
   });
 
   click('#reply-control button.create');
   andThen(() => {
     ok(!exists('.title-input .popup-tip.bad.hide'), 'it shows the empty title error');
-    ok(!exists('.textarea-wrapper .popup-tip.bad.hide'), 'it shows the empty body error');
+    ok(!exists('.d-editor-wrapper .popup-tip.bad.hide'), 'it shows the empty body error');
   });
 
   fillIn('#reply-title', "this is my new topic title");
@@ -36,10 +36,10 @@ test("Tests the Composer controls", () => {
     ok(exists('.title-input .popup-tip.good'), 'the title is now good');
   });
 
-  fillIn('.wmd-input', "this is the *content* of a post");
+  fillIn('.d-editor-input', "this is the *content* of a post");
   andThen(() => {
-    equal(find('.wmd-preview').html(), "<p>this is the <em>content</em> of a post</p>", "it previews content");
-    ok(exists('.textarea-wrapper .popup-tip.good'), 'the body is now good');
+    equal(find('.d-editor-preview').html().trim(), "<p>this is the <em>content</em> of a post</p>", "it previews content");
+    ok(exists('.d-editor-textarea-wrapper .popup-tip.good'), 'the body is now good');
   });
 
   click('#reply-control a.cancel');
@@ -58,7 +58,7 @@ test("Create a topic with server side errors", () => {
   visit("/");
   click('#create-topic');
   fillIn('#reply-title', "this title triggers an error");
-  fillIn('.wmd-input', "this is the *content* of a post");
+  fillIn('.d-editor-input', "this is the *content* of a post");
   click('#reply-control button.create');
   andThen(() => {
     ok(exists('.bootbox.modal'), 'it pops up an error message');
@@ -66,7 +66,7 @@ test("Create a topic with server side errors", () => {
   click('.bootbox.modal a.btn-primary');
   andThen(() => {
     ok(!exists('.bootbox.modal'), 'it dismisses the error');
-    ok(exists('.wmd-input'), 'the composer input is visible');
+    ok(exists('.d-editor-input'), 'the composer input is visible');
   });
 });
 
@@ -74,7 +74,7 @@ test("Create a Topic", () => {
   visit("/");
   click('#create-topic');
   fillIn('#reply-title', "Internationalization Localization");
-  fillIn('.wmd-input', "this is the *content* of a new topic post");
+  fillIn('.d-editor-input', "this is the *content* of a new topic post");
   click('#reply-control button.create');
   andThen(() => {
     equal(currentURL(), "/t/internationalization-localization/280", "it transitions to the newly created topic URL");
@@ -85,7 +85,7 @@ test("Create an enqueued Topic", () => {
   visit("/");
   click('#create-topic');
   fillIn('#reply-title', "Internationalization Localization");
-  fillIn('.wmd-input', "enqueue this content please");
+  fillIn('.d-editor-input', "enqueue this content please");
   click('#reply-control button.create');
   andThen(() => {
     ok(visible('#discourse-modal'), 'it pops up a modal');
@@ -108,11 +108,11 @@ test("Create a Reply", () => {
 
   click('#topic-footer-buttons .btn.create');
   andThen(() => {
-    ok(exists('.wmd-input'), 'the composer input is visible');
+    ok(exists('.d-editor-input'), 'the composer input is visible');
     ok(!exists('#reply-title'), 'there is no title since this is a reply');
   });
 
-  fillIn('.wmd-input', 'this is the content of my reply');
+  fillIn('.d-editor-input', 'this is the content of my reply');
   click('#reply-control button.create');
   andThen(() => {
     equal(find('.cooked:last p').text(), 'this is the content of my reply');
@@ -122,7 +122,7 @@ test("Create a Reply", () => {
 test("Posting on a different topic", (assert) => {
   visit("/t/internationalization-localization/280");
   click('#topic-footer-buttons .btn.create');
-  fillIn('.wmd-input', 'this is the content for a different topic');
+  fillIn('.d-editor-input', 'this is the content for a different topic');
 
   visit("/t/1-3-0beta9-no-rate-limit-popups/28830");
   andThen(function() {
@@ -145,11 +145,11 @@ test("Create an enqueued Reply", () => {
 
   click('#topic-footer-buttons .btn.create');
   andThen(() => {
-    ok(exists('.wmd-input'), 'the composer input is visible');
+    ok(exists('.d-editor-input'), 'the composer input is visible');
     ok(!exists('#reply-title'), 'there is no title since this is a reply');
   });
 
-  fillIn('.wmd-input', 'enqueue this content please');
+  fillIn('.d-editor-input', 'enqueue this content please');
   click('#reply-control button.create');
   andThen(() => {
     ok(find('.cooked:last p').text() !== 'enqueue this content please', "it doesn't insert the post");
@@ -173,14 +173,14 @@ test("Edit the first post", () => {
   click('.topic-post:eq(0) button[data-action=showMoreActions]');
   click('.topic-post:eq(0) button[data-action=edit]');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('Any plans to support'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('Any plans to support'), 0, 'it populates the input with the post text');
   });
 
-  fillIn('.wmd-input', "This is the new text for the post");
+  fillIn('.d-editor-input', "This is the new text for the post");
   fillIn('#reply-title', "This is the new text for the title");
   click('#reply-control button.create');
   andThen(() => {
-    ok(!exists('.wmd-input'), 'it closes the composer');
+    ok(!exists('.d-editor-input'), 'it closes the composer');
     ok(exists('.topic-post:eq(0) .post-info.edits'), 'it has the edits icon');
     ok(find('#topic-title h1').text().indexOf('This is the new text for the title') !== -1, 'it shows the new title');
     ok(find('.topic-post:eq(0) .cooked').text().indexOf('This is the new text for the post') !== -1, 'it updates the post');
@@ -192,11 +192,11 @@ test("Composer can switch between edits", () => {
 
   click('.topic-post:eq(0) button[data-action=edit]');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
   });
   click('.topic-post:eq(1) button[data-action=edit]');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the second post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the second post.'), 0, 'it populates the input with the post text');
   });
 });
 
@@ -204,14 +204,14 @@ test("Composer with dirty edit can toggle to another edit", () => {
   visit("/t/this-is-a-test-topic/9");
 
   click('.topic-post:eq(0) button[data-action=edit]');
-  fillIn('.wmd-input', 'This is a dirty reply');
+  fillIn('.d-editor-input', 'This is a dirty reply');
   click('.topic-post:eq(1) button[data-action=edit]');
   andThen(() => {
     ok(exists('.bootbox.modal'), 'it pops up a confirmation dialog');
   });
   click('.modal-footer a:eq(0)');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the second post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the second post.'), 0, 'it populates the input with the post text');
   });
 });
 
@@ -220,15 +220,15 @@ test("Composer can toggle between edit and reply", () => {
 
   click('.topic-post:eq(0) button[data-action=edit]');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
   });
   click('.topic-post:eq(0) button[data-action=reply]');
   andThen(() => {
-    equal(find('.wmd-input').val(), "", 'it clears the input');
+    equal(find('.d-editor-input').val(), "", 'it clears the input');
   });
   click('.topic-post:eq(0) button[data-action=edit]');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
   });
 });
 
@@ -236,14 +236,14 @@ test("Composer with dirty reply can toggle to edit", () => {
   visit("/t/this-is-a-test-topic/9");
 
   click('.topic-post:eq(0) button[data-action=reply]');
-  fillIn('.wmd-input', 'This is a dirty reply');
+  fillIn('.d-editor-input', 'This is a dirty reply');
   click('.topic-post:eq(0) button[data-action=edit]');
   andThen(() => {
     ok(exists('.bootbox.modal'), 'it pops up a confirmation dialog');
   });
   click('.modal-footer a:eq(0)');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
   });
 });
 
@@ -251,7 +251,7 @@ test("Composer draft with dirty reply can toggle to edit", () => {
   visit("/t/this-is-a-test-topic/9");
 
   click('.topic-post:eq(0) button[data-action=reply]');
-  fillIn('.wmd-input', 'This is a dirty reply');
+  fillIn('.d-editor-input', 'This is a dirty reply');
   click('.toggler');
   click('.topic-post:eq(0) button[data-action=edit]');
   andThen(() => {
@@ -259,6 +259,6 @@ test("Composer draft with dirty reply can toggle to edit", () => {
   });
   click('.modal-footer a:eq(0)');
   andThen(() => {
-    equal(find('.wmd-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
+    equal(find('.d-editor-input').val().indexOf('This is the first post.'), 0, 'it populates the input with the post text');
   });
 });

test/javascripts/components/d-editor-test.js.es6

@@ -8,13 +8,10 @@ componentTest('preview updates with markdown', {
 
   test(assert) {
     assert.ok(this.$('.d-editor-button-bar').length);
-    assert.equal(this.$('.d-editor-preview.hidden').length, 1);
-
     fillIn('.d-editor-input', 'hello **world**');
 
     andThen(() => {
       assert.equal(this.get('value'), 'hello **world**');
-      assert.equal(this.$('.d-editor-preview.hidden').length, 0);
       assert.equal(this.$('.d-editor-preview').html().trim(), '<p>hello <strong>world</strong></p>');
     });
   }

test/javascripts/models/composer-test.js.es6

@@ -1,13 +1,10 @@
 import { blank } from 'helpers/qunit-helpers';
 import { currentUser } from 'helpers/qunit-helpers';
-import KeyValueStore from 'discourse/lib/key-value-store';
 import Composer from 'discourse/models/composer';
 import createStore from 'helpers/create-store';
 
 module("model:composer");
 
-const keyValueStore = new KeyValueStore("_test_composer");
-
 function createComposer(opts) {
   opts = opts || {};
   opts.user = opts.user || currentUser();
@@ -185,22 +182,6 @@ test('initial category when uncategorized is not allowed', function() {
   ok(!composer.get('categoryId'), "Uncategorized by default. Must choose a category.");
 });
 
-test('showPreview', function() {
-  const newComposer = function() {
-    return openComposer({action: 'createTopic', draftKey: 'asfd', draftSequence: 1});
-  };
-
-  Discourse.Mobile.mobileView = true;
-  equal(newComposer().get('showPreview'), false, "Don't show preview in mobile view");
-
-  keyValueStore.set({ key: 'composer.showPreview', value: 'true' });
-  equal(newComposer().get('showPreview'), false, "Don't show preview in mobile view even if KeyValueStore wants to");
-  keyValueStore.remove('composer.showPreview');
-
-  Discourse.Mobile.mobileView = false;
-  equal(newComposer().get('showPreview'), true, "Show preview by default in desktop view");
-});
-
 test('open with a quote', function() {
   const quote = '[quote="neil, post:5, topic:413"]\nSimmer down you two.\n[/quote]';
   const newComposer = function() {

test/javascripts/test_helper.js

@@ -21,9 +21,6 @@
 //= require ../../app/assets/javascripts/locales/i18n
 //= require ../../app/assets/javascripts/locales/en
 
-// Pagedown customizations
-//= require ../../app/assets/javascripts/pagedown_custom.js
-
 //= require vendor
 
 //= require htmlparser.js