Implement zen mode for issues/MRs/notes

app/assets/javascripts/markdown_area.js.coffee

@@ -27,7 +27,7 @@ $(document).ready ->
   dropzone = $(".div-dropzone").dropzone(
     url: project_image_path_upload
     dictDefaultMessage: ""
-    clickable: true
+    clickable: false
     paramName: "markdown_img"
     maxFilesize: 10
     uploadMultiple: false

app/assets/stylesheets/generic/forms.scss

@@ -83,3 +83,140 @@ label {
 .form-control {
   @include box-shadow(none);
 }
+
+.issuable-description {
+  margin-top: 35px;
+}
+
+.zennable {
+  position: relative;
+
+  input {
+    display: none;
+  }
+
+  .collapse {
+    display: none;
+    opacity: 0.5;
+
+    &:before {
+      content: '\f066';
+      font-family: FontAwesome;
+      color: #000;
+      font-size: 28px;
+      position: relative;
+      padding: 30px 40px 0 0;
+    }
+
+    &:hover {
+      opacity: 0.8;
+    }
+  }
+
+  .expand {
+    opacity: 0.5;
+
+    &:before {
+      content: '\f065';
+      font-family: FontAwesome;
+      color: #000;
+      font-size: 14px;
+      line-height: 14px;
+      padding-right: 20px;
+      position: relative;
+      vertical-align: middle;
+    }
+
+    &:hover {
+      opacity: 0.8;
+    }
+  }
+
+  input:checked ~ .zen-backdrop .expand {
+    display: none;
+  }
+
+  input:checked ~ .zen-backdrop .collapse {
+    display: block;
+    position: absolute;
+    top: 0;
+  }
+
+  label {
+    position: absolute;
+    top: -26px;
+    right: 0;
+    font-variant: small-caps;
+    text-transform: uppercase;
+    font-size: 10px;
+    padding: 4px;
+    font-weight: 500;
+    letter-spacing: 1px;
+
+    &:before {
+      display: inline-block;
+      width: 10px;
+      height: 14px;
+    }
+  }
+
+  input:checked ~ .zen-backdrop {
+    background-color: white;
+    position: fixed;
+    top: 0;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    z-index: 1031;
+
+    textarea {
+      border: none;
+      box-shadow: none;
+      border-radius: 0;
+      color: #000;
+      font-size: 20px;
+      line-height: 26px;
+      padding: 30px;
+      display: block;
+      outline: none;
+      resize: none;
+      height: 100vh;
+      max-width: 900px;
+      margin: 0 auto;
+    }
+  }
+
+  .zen-backdrop textarea::-webkit-input-placeholder {
+    color: white;
+  }
+
+  .zen-backdrop textarea:-moz-placeholder {
+    color: white;
+  }
+
+  .zen-backdrop textarea::-moz-placeholder {
+    color: white;
+  }
+
+  .zen-backdrop textarea:-ms-input-placeholder {
+    color: white;
+  }
+
+  input:checked ~ .zen-backdrop textarea::-webkit-input-placeholder {
+    color: #999;
+  }
+
+  input:checked ~ .zen-backdrop textarea:-moz-placeholder {
+    color: #999;
+    opacity: 1;
+  }
+
+  input:checked ~ .zen-backdrop textarea::-moz-placeholder {
+    color: #999;
+    opacity: 1;
+  }
+
+  input:checked ~ .zen-backdrop textarea:-ms-input-placeholder {
+    color: #999;
+  }
+}

app/views/projects/_issuable_form.html.haml

@@ -4,11 +4,15 @@
   .col-sm-10
     = f.text_field :title, maxlength: 255, autofocus: true,
         class: 'form-control pad js-gfm-input', required: true
-.form-group
+.form-group.issuable-description
   = f.label :description, 'Description', class: 'control-label'
   .col-sm-10
-    = f.text_area :description, rows: 14,
-        class: 'form-control js-gfm-input markdown-area'
+    .zennable
+      %input#zen-toggle-comment{ tabindex: '-1', type: 'checkbox' }
+      .zen-backdrop
+        = f.text_area :description, rows: 14, class: 'form-control js-gfm-input markdown-area', placeholder: 'Leave a comment'
+        %label{ for: 'zen-toggle-comment', class: 'expand' } Edit in fullscreen
+        %label{ for: 'zen-toggle-comment', class: 'collapse' }
     .col-sm-12.hint
       .pull-left
         Parsed with

app/views/projects/merge_requests/_new_submit.html.haml

@@ -21,7 +21,12 @@
       .form-group
         .light
           = f.label :description, "Description"
-        = f.text_area :description, class: "form-control js-gfm-input markdown-area", rows: 10
+        .zennable
+          %input#zen-toggle-comment{ tabindex: '-1', type: 'checkbox' }
+          .zen-backdrop
+            = f.text_area :description, class: 'form-control js-gfm-input markdown-area mousetrap', rows: 10, placeholder: 'Leave a comment'
+            %label{ for: 'zen-toggle-comment', class: 'expand' } Edit in fullscreen
+            %label{ for: 'zen-toggle-comment', class: 'collapse' }
         .clearfix.hint
           .pull-left Description is parsed with #{link_to "GitLab Flavored Markdown", help_page_path("markdown", "markdown"), target: '_blank'}.
           .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.

app/views/projects/notes/_form.html.haml

@@ -14,7 +14,12 @@
         Preview
   %div
     .note-write-holder
-      = f.text_area :note, size: 255, class: 'note_text js-note-text js-gfm-input markdown-area'
+      .zennable
+        %input#zen-toggle-comment{ tabindex: '-1', type: 'checkbox' }
+        .zen-backdrop
+          = f.text_area :note, size: 255, class: 'note_text js-note-text js-gfm-input markdown-area', placeholder: 'Leave a comment'
+          %label{ for: 'zen-toggle-comment', class: 'expand' } Edit in fullscreen
+          %label{ for: 'zen-toggle-comment', class: 'collapse' }
 
       .light.clearfix
         .pull-left Comments are parsed with #{link_to "GitLab Flavored Markdown", help_page_path("markdown", "markdown"),{ target: '_blank', tabindex: -1 }}