Redesign the landing page, mount public timeline on it (#4122)

* Redesign the landing page, mount public timeline on it

* Adjust the standalone mounted component to the lacking of router

* Adjust auth layout pages to new design

* Fix tests

* Standalone public timeline polling every 5 seconds

* Remove now obsolete translations

* Add responsive design for new landing page

* Address reviews

* Add floating clouds behind frontpage form

* Use access token from public page when available

* Fix mentions and hashtags links, cursor on status content in standalone mode

* Add footer link to source code

* Fix errors on pages that don't embed the component, use classnames

* Fix tests

* Change anonymous autoPlayGif default to false

* When gif autoplay is disabled, hover to play

* Add option to hide the timeline preview

* Slightly improve alt layout

* Add elephant friend to new frontpage

* Display "back to mastodon" in place of "login" when logged in on frontpage

* Change polling time to 3s

34 files changed, 890 insertions, 233 deletions

diff --git a/app/controllers/about_controller.rb b/app/controllers/about_controller.rb
index c0addbeccc6..47690e81eb9 100644
--- a/app/controllers/about_controller.rb
+++ b/app/controllers/about_controller.rb
@@ -4,7 +4,10 @@ class AboutController < ApplicationController
   before_action :set_body_classes
   before_action :set_instance_presenter, only: [:show, :more, :terms]
 
-  def show; end
+  def show
+    serializable_resource = ActiveModelSerializers::SerializableResource.new(InitialStatePresenter.new(initial_state_params), serializer: InitialStateSerializer)
+    @initial_state_json   = serializable_resource.to_json
+  end
 
   def more; end
 
@@ -15,6 +18,7 @@ class AboutController < ApplicationController
   def new_user
     User.new.tap(&:build_account)
   end
+
   helper_method :new_user
 
   def set_instance_presenter
@@ -24,4 +28,11 @@ class AboutController < ApplicationController
   def set_body_classes
     @body_classes = 'about-body'
   end
+
+  def initial_state_params
+    {
+      settings: {},
+      token: current_session&.token,
+    }
+  end
 end
diff --git a/app/controllers/admin/settings_controller.rb b/app/controllers/admin/settings_controller.rb
index f27a1f4d450..29b590d7a3d 100644
--- a/app/controllers/admin/settings_controller.rb
+++ b/app/controllers/admin/settings_controller.rb
@@ -11,8 +11,15 @@ module Admin
       site_terms
       open_registrations
       closed_registrations_message
+      open_deletion
+      timeline_preview
+    ).freeze
+
+    BOOLEAN_SETTINGS = %w(
+      open_registrations
+      open_deletion
+      timeline_preview
     ).freeze
-    BOOLEAN_SETTINGS = %w(open_registrations).freeze
 
     def edit
       @settings = Setting.all_as_records
diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index 218da69066f..8a8b9ec76ba 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -15,12 +15,16 @@ class HomeController < ApplicationController
   end
 
   def set_initial_state_json
-    state = InitialStatePresenter.new(settings: Web::Setting.find_by(user: current_user)&.data || {},
-                                      current_account: current_account,
-                                      token: current_session.token,
-                                      admin: Account.find_local(Setting.site_contact_username))
-
-    serializable_resource = ActiveModelSerializers::SerializableResource.new(state, serializer: InitialStateSerializer)
+    serializable_resource = ActiveModelSerializers::SerializableResource.new(InitialStatePresenter.new(initial_state_params), serializer: InitialStateSerializer)
     @initial_state_json   = serializable_resource.to_json
   end
+
+  def initial_state_params
+    {
+      settings: Web::Setting.find_by(user: current_user)&.data || {},
+      current_account: current_account,
+      token: current_session.token,
+      admin: Account.find_local(Setting.site_contact_username),
+    }
+  end
 end
diff --git a/app/javascript/fonts/montserrat/Montserrat-Medium.ttf b/app/javascript/fonts/montserrat/Montserrat-Medium.ttf
new file mode 100644
index 00000000000..88d70b89c3f
--- /dev/null
+++ b/app/javascript/fonts/montserrat/Montserrat-Medium.ttf
diff --git a/app/javascript/images/cloud2.png b/app/javascript/images/cloud2.png
new file mode 100644
index 00000000000..f325ca6de09
--- /dev/null
+++ b/app/javascript/images/cloud2.png
diff --git a/app/javascript/images/cloud3.png b/app/javascript/images/cloud3.png
new file mode 100644
index 00000000000..ab194d0b857
--- /dev/null
+++ b/app/javascript/images/cloud3.png
diff --git a/app/javascript/images/cloud4.png b/app/javascript/images/cloud4.png
new file mode 100644
index 00000000000..98323f5a271
--- /dev/null
+++ b/app/javascript/images/cloud4.png
diff --git a/app/javascript/images/elephant-fren.png b/app/javascript/images/elephant-fren.png
new file mode 100644
index 00000000000..3b64edf084c
--- /dev/null
+++ b/app/javascript/images/elephant-fren.png
diff --git a/app/javascript/images/logo.svg b/app/javascript/images/logo.svg
index c233db84281..16cb3a94407 100644
--- a/app/javascript/images/logo.svg
+++ b/app/javascript/images/logo.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" height="1000" width="1000"><path d="M500 0a500 500 0 0 0-353.553 146.447 500 500 0 1 0 707.106 707.106A500 500 0 0 0 500 0zm-.059 280.05h107.12c-19.071 13.424-26.187 51.016-27.12 73.843V562.05c0 44.32-35.68 80-80 80s-80-35.68-80-80v-202c0-44.32 35.68-80 80-80zm-.441 52c-15.464 0-28 12.537-28 28 0 15.465 12.536 28 28 28s28-12.535 28-28c0-15.463-12.536-28-28-28zm-279.059 7.9c44.32 0 80 35.68 80 80v206.157c.933 22.827 8.049 60.42 27.12 73.842H220.44c-44.32 0-80-35.68-80-80v-200c0-44.32 35.68-80 80-80zm559.12 0c44.32 0 80 35.68 80 80v200c0 44.32-35.68 80-80 80H672.44c19.071-13.424 26.187-51.016 27.12-73.843V419.95c0-44.32 35.68-80 80-80zM220 392c-15.464 0-28 12.536-28 28s12.536 28 28 28 28-12.536 28-28-12.536-28-28-28zm560 0c-15.464 0-28 12.536-28 28s12.536 28 28 28 28-12.536 28-28-12.536-28-28-28zm-280.5 40.05c-15.464 0-28 12.537-28 28 0 15.465 12.536 28 28 28s28-12.535 28-28c0-15.463-12.536-28-28-28zM220 491.95c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28zm560 0c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28zM499.5 532c-15.464 0-28 12.536-28 28s12.536 28 28 28 28-12.536 28-28-12.536-28-28-28zM220 591.95c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28zm560 0c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28z" fill="#189efc"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" height="1000" width="1000"><path d="M500 0a500 500 0 0 0-353.553 146.447 500 500 0 1 0 707.106 707.106A500 500 0 0 0 500 0zm-.059 280.05h107.12c-19.071 13.424-26.187 51.016-27.12 73.843V562.05c0 44.32-35.68 80-80 80s-80-35.68-80-80v-202c0-44.32 35.68-80 80-80zm-.441 52c-15.464 0-28 12.537-28 28 0 15.465 12.536 28 28 28s28-12.535 28-28c0-15.463-12.536-28-28-28zm-279.059 7.9c44.32 0 80 35.68 80 80v206.157c.933 22.827 8.049 60.42 27.12 73.842H220.44c-44.32 0-80-35.68-80-80v-200c0-44.32 35.68-80 80-80zm559.12 0c44.32 0 80 35.68 80 80v200c0 44.32-35.68 80-80 80H672.44c19.071-13.424 26.187-51.016 27.12-73.843V419.95c0-44.32 35.68-80 80-80zM220 392c-15.464 0-28 12.536-28 28s12.536 28 28 28 28-12.536 28-28-12.536-28-28-28zm560 0c-15.464 0-28 12.536-28 28s12.536 28 28 28 28-12.536 28-28-12.536-28-28-28zm-280.5 40.05c-15.464 0-28 12.537-28 28 0 15.465 12.536 28 28 28s28-12.535 28-28c0-15.463-12.536-28-28-28zM220 491.95c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28zm560 0c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28zM499.5 532c-15.464 0-28 12.536-28 28s12.536 28 28 28 28-12.536 28-28-12.536-28-28-28zM220 591.95c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28zm560 0c-15.464 0-28 12.535-28 28 0 15.463 12.536 28 28 28s28-12.537 28-28c0-15.465-12.536-28-28-28z" fill="#fff"/></svg>
diff --git a/app/javascript/mastodon/components/dropdown_menu.js b/app/javascript/mastodon/components/dropdown_menu.js
index 12e1b44fa22..98323b0691d 100644
--- a/app/javascript/mastodon/components/dropdown_menu.js
+++ b/app/javascript/mastodon/components/dropdown_menu.js
@@ -14,6 +14,7 @@ export default class DropdownMenu extends React.PureComponent {
     size: PropTypes.number.isRequired,
     direction: PropTypes.string,
     ariaLabel: PropTypes.string,
+    disabled: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -68,9 +69,19 @@ export default class DropdownMenu extends React.PureComponent {
   }
 
   render () {
-    const { icon, items, size, direction, ariaLabel } = this.props;
-    const { expanded } = this.state;
+    const { icon, items, size, direction, ariaLabel, disabled } = this.props;
+    const { expanded }   = this.state;
     const directionClass = (direction === 'left') ? 'dropdown__left' : 'dropdown__right';
+    const iconStyle      = { fontSize: `${size}px`, width: `${size}px`, lineHeight: `${size}px` };
+    const iconClassname  = `fa fa-fw fa-${icon} dropdown__icon`;
+
+    if (disabled) {
+      return (
+        <div className='icon-button disabled' style={iconStyle} aria-label={ariaLabel}>
+          <i className={iconClassname} aria-hidden />
+        </div>
+      );
+    }
 
     const dropdownItems = expanded && (
       <ul className='dropdown__content-list'>
@@ -80,8 +91,8 @@ export default class DropdownMenu extends React.PureComponent {
 
     return (
       <Dropdown ref={this.setRef} onShow={this.handleShow} onHide={this.handleHide}>
-        <DropdownTrigger className='icon-button' style={{ fontSize: `${size}px`, width: `${size}px`, lineHeight: `${size}px` }} aria-label={ariaLabel}>
-          <i className={`fa fa-fw fa-${icon} dropdown__icon`}  aria-hidden />
+        <DropdownTrigger className='icon-button' style={iconStyle} aria-label={ariaLabel}>
+          <i className={iconClassname} aria-hidden />
         </DropdownTrigger>
 
         <DropdownContent className={directionClass}>
diff --git a/app/javascript/mastodon/components/media_gallery.js b/app/javascript/mastodon/components/media_gallery.js
index 75222e9650a..89a358e384c 100644
--- a/app/javascript/mastodon/components/media_gallery.js
+++ b/app/javascript/mastodon/components/media_gallery.js
@@ -11,18 +11,44 @@ const messages = defineMessages({
 
 class Item extends React.PureComponent {
 
+  static contextTypes = {
+    router: PropTypes.object,
+  };
+
   static propTypes = {
     attachment: ImmutablePropTypes.map.isRequired,
     index: PropTypes.number.isRequired,
     size: PropTypes.number.isRequired,
     onClick: PropTypes.func.isRequired,
-    autoPlayGif: PropTypes.bool.isRequired,
+    autoPlayGif: PropTypes.bool,
+  };
+
+  static defaultProps = {
+    autoPlayGif: false,
   };
 
+  handleMouseEnter = (e) => {
+    if (this.hoverToPlay()) {
+      e.target.play();
+    }
+  }
+
+  handleMouseLeave = (e) => {
+    if (this.hoverToPlay()) {
+      e.target.pause();
+      e.target.currentTime = 0;
+    }
+  }
+
+  hoverToPlay () {
+    const { attachment, autoPlayGif } = this.props;
+    return !autoPlayGif && attachment.get('type') === 'gifv';
+  }
+
   handleClick = (e) => {
     const { index, onClick } = this.props;
 
-    if (e.button === 0) {
+    if (this.context.router && e.button === 0) {
       e.preventDefault();
       onClick(index);
     }
@@ -116,6 +142,8 @@ class Item extends React.PureComponent {
             role='application'
             src={attachment.get('url')}
             onClick={this.handleClick}
+            onMouseEnter={this.handleMouseEnter}
+            onMouseLeave={this.handleMouseLeave}
             autoPlay={autoPlay}
             loop
             muted
@@ -144,7 +172,11 @@ export default class MediaGallery extends React.PureComponent {
     height: PropTypes.number.isRequired,
     onOpenMedia: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
-    autoPlayGif: PropTypes.bool.isRequired,
+    autoPlayGif: PropTypes.bool,
+  };
+
+  static defaultProps = {
+    autoPlayGif: false,
   };
 
   state = {
diff --git a/app/javascript/mastodon/components/permalink.js b/app/javascript/mastodon/components/permalink.js
index 0b7d0a65ad9..d726d37a20a 100644
--- a/app/javascript/mastodon/components/permalink.js
+++ b/app/javascript/mastodon/components/permalink.js
@@ -15,7 +15,7 @@ export default class Permalink extends React.PureComponent {
   };
 
   handleClick = (e) => {
-    if (e.button === 0 && !(e.ctrlKey || e.metaKey)) {
+    if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
       e.preventDefault();
       this.context.router.history.push(this.props.to);
     }
@@ -25,7 +25,7 @@ export default class Permalink extends React.PureComponent {
     const { href, children, className, ...other } = this.props;
 
     return (
-      <a href={href} onClick={this.handleClick} {...other} className={`permalink${className ? ' ' + className : ''}`}>
+      <a target='_blank' href={href} onClick={this.handleClick} {...other} className={`permalink${className ? ' ' + className : ''}`}>
         {children}
       </a>
     );
diff --git a/app/javascript/mastodon/components/status.js b/app/javascript/mastodon/components/status.js
index df771f5a8f6..6b9fdd2afe7 100644
--- a/app/javascript/mastodon/components/status.js
+++ b/app/javascript/mastodon/components/status.js
@@ -140,12 +140,16 @@ export default class Status extends ImmutablePureComponent {
   }
 
   handleClick = () => {
+    if (!this.context.router) {
+      return;
+    }
+
     const { status } = this.props;
     this.context.router.history.push(`/statuses/${status.getIn(['reblog', 'id'], status.get('id'))}`);
   }
 
   handleAccountClick = (e) => {
-    if (e.button === 0) {
+    if (this.context.router && e.button === 0) {
       const id = Number(e.currentTarget.getAttribute('data-id'));
       e.preventDefault();
       this.context.router.history.push(`/accounts/${id}`);
@@ -236,7 +240,7 @@ export default class Status extends ImmutablePureComponent {
         <div className='status__info'>
           <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
 
-          <a onClick={this.handleAccountClick} data-id={status.getIn(['account', 'id'])} href={status.getIn(['account', 'url'])} className='status__display-name'>
+          <a onClick={this.handleAccountClick} target='_blank' data-id={status.getIn(['account', 'id'])} href={status.getIn(['account', 'url'])} className='status__display-name'>
             <div className='status__avatar'>
               {statusAvatar}
             </div>
diff --git a/app/javascript/mastodon/components/status_action_bar.js b/app/javascript/mastodon/components/status_action_bar.js
index fd7c990544e..7bb394e71bd 100644
--- a/app/javascript/mastodon/components/status_action_bar.js
+++ b/app/javascript/mastodon/components/status_action_bar.js
@@ -40,7 +40,7 @@ export default class StatusActionBar extends ImmutablePureComponent {
     onBlock: PropTypes.func,
     onReport: PropTypes.func,
     onMuteConversation: PropTypes.func,
-    me: PropTypes.number.isRequired,
+    me: PropTypes.number,
     withDismiss: PropTypes.bool,
     intl: PropTypes.object.isRequired,
   };
@@ -97,6 +97,7 @@ export default class StatusActionBar extends ImmutablePureComponent {
     const { status, me, intl, withDismiss } = this.props;
     const reblogDisabled = status.get('visibility') === 'private' || status.get('visibility') === 'direct';
     const mutingConversation = status.get('muted');
+    const anonymousAccess = !me;
 
     let menu = [];
     let reblogIcon = 'retweet';
@@ -137,12 +138,12 @@ export default class StatusActionBar extends ImmutablePureComponent {
 
     return (
       <div className='status__action-bar'>
-        <IconButton className='status__action-bar-button' title={replyTitle} icon={replyIcon} onClick={this.handleReplyClick} />
-        <IconButton className='status__action-bar-button' disabled={reblogDisabled} active={status.get('reblogged')} title={reblogDisabled ? intl.formatMessage(messages.cannot_reblog) : intl.formatMessage(messages.reblog)} icon={reblogIcon} onClick={this.handleReblogClick} />
-        <IconButton className='status__action-bar-button star-icon' animate active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} />
+        <IconButton className='status__action-bar-button' disabled={anonymousAccess} title={replyTitle} icon={replyIcon} onClick={this.handleReplyClick} />
+        <IconButton className='status__action-bar-button' disabled={anonymousAccess || reblogDisabled} active={status.get('reblogged')} title={reblogDisabled ? intl.formatMessage(messages.cannot_reblog) : intl.formatMessage(messages.reblog)} icon={reblogIcon} onClick={this.handleReblogClick} />
+        <IconButton className='status__action-bar-button star-icon' disabled={anonymousAccess} animate active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} />
 
         <div className='status__action-bar-dropdown'>
-          <DropdownMenu items={menu} icon='ellipsis-h' size={18} direction='right' ariaLabel='More' />
+          <DropdownMenu disabled={anonymousAccess} items={menu} icon='ellipsis-h' size={18} direction='right' ariaLabel='More' />
         </div>
       </div>
     );
diff --git a/app/javascript/mastodon/components/status_content.js b/app/javascript/mastodon/components/status_content.js
index 02b4c84020c..1b803a22ec0 100644
--- a/app/javascript/mastodon/components/status_content.js
+++ b/app/javascript/mastodon/components/status_content.js
@@ -6,6 +6,7 @@ import emojify from '../emoji';
 import { isRtl } from '../rtl';
 import { FormattedMessage } from 'react-intl';
 import Permalink from './permalink';
+import classnames from 'classnames';
 
 export default class StatusContent extends React.PureComponent {
 
@@ -43,10 +44,11 @@ export default class StatusContent extends React.PureComponent {
       } else if (link.textContent[0] === '#' || (link.previousSibling && link.previousSibling.textContent && link.previousSibling.textContent[link.previousSibling.textContent.length - 1] === '#')) {
         link.addEventListener('click', this.onHashtagClick.bind(this, link.text), false);
       } else {
-        link.set