Merge branch '8088_embedded_snippets_support' into 'master'

Embedded Snippets Support

Closes #8088

See merge request gitlab-org/gitlab-ce!15695

27 files changed, 696 insertions, 301 deletions

diff --git a/app/assets/images/ext_snippet_icons/ext_snippet_icons.png b/app/assets/images/ext_snippet_icons/ext_snippet_icons.png
new file mode 100644
index 00000000000..20380adc4e5
--- /dev/null
+++ b/app/assets/images/ext_snippet_icons/ext_snippet_icons.png
diff --git a/app/assets/images/ext_snippet_icons/logo.png b/app/assets/images/ext_snippet_icons/logo.png
new file mode 100644
index 00000000000..794c9cc2dbc
--- /dev/null
+++ b/app/assets/images/ext_snippet_icons/logo.png
diff --git a/app/assets/javascripts/pages/projects/snippets/show/index.js b/app/assets/javascripts/pages/projects/snippets/show/index.js
index a134599cb04..c35b9c30058 100644
--- a/app/assets/javascripts/pages/projects/snippets/show/index.js
+++ b/app/assets/javascripts/pages/projects/snippets/show/index.js
@@ -1,11 +1,13 @@
 import initNotes from '~/init_notes';
 import ZenMode from '~/zen_mode';
-import LineHighlighter from '../../../../line_highlighter';
-import BlobViewer from '../../../../blob/viewer';
+import LineHighlighter from '~/line_highlighter';
+import BlobViewer from '~/blob/viewer';
+import snippetEmbed from '~/snippet/snippet_embed';
 
 document.addEventListener('DOMContentLoaded', () => {
   new LineHighlighter(); // eslint-disable-line no-new
   new BlobViewer(); // eslint-disable-line no-new
   initNotes();
   new ZenMode(); // eslint-disable-line no-new
+  snippetEmbed();
 });
diff --git a/app/assets/javascripts/pages/snippets/show/index.js b/app/assets/javascripts/pages/snippets/show/index.js
index f548b9fad65..26936110402 100644
--- a/app/assets/javascripts/pages/snippets/show/index.js
+++ b/app/assets/javascripts/pages/snippets/show/index.js
@@ -1,11 +1,13 @@
-import LineHighlighter from '../../../line_highlighter';
-import BlobViewer from '../../../blob/viewer';
-import ZenMode from '../../../zen_mode';
-import initNotes from '../../../init_notes';
+import LineHighlighter from '~/line_highlighter';
+import BlobViewer from '~/blob/viewer';
+import ZenMode from '~/zen_mode';
+import initNotes from '~/init_notes';
+import snippetEmbed from '~/snippet/snippet_embed';
 
 document.addEventListener('DOMContentLoaded', () => {
   new LineHighlighter(); // eslint-disable-line no-new
   new BlobViewer(); // eslint-disable-line no-new
   initNotes();
   new ZenMode(); // eslint-disable-line no-new
+  snippetEmbed();
 });
diff --git a/app/assets/javascripts/snippet/snippet_embed.js b/app/assets/javascripts/snippet/snippet_embed.js
new file mode 100644
index 00000000000..81ec483f2d9
--- /dev/null
+++ b/app/assets/javascripts/snippet/snippet_embed.js
@@ -0,0 +1,23 @@
+export default () => {
+  const { protocol, host, pathname } = location;
+  const shareBtn = document.querySelector('.js-share-btn');
+  const embedBtn = document.querySelector('.js-embed-btn');
+  const snippetUrlArea = document.querySelector('.js-snippet-url-area');
+  const embedAction = document.querySelector('.js-embed-action');
+  const url = `${protocol}//${host + pathname}`;
+
+  shareBtn.addEventListener('click', () => {
+    shareBtn.classList.add('is-active');
+    embedBtn.classList.remove('is-active');
+    snippetUrlArea.value = url;
+    embedAction.innerText = 'Share';
+  });
+
+  embedBtn.addEventListener('click', () => {
+    embedBtn.classList.add('is-active');
+    shareBtn.classList.remove('is-active');
+    const scriptTag = `<script src="${url}.js"></script>`;
+    snippetUrlArea.value = scriptTag;
+    embedAction.innerText = 'Embed';
+  });
+};
diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index 0665622fe4a..f2950308019 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -37,7 +37,11 @@
 /*
  * Code highlight
  */
-@import "highlight/**/*";
+@import "highlight/dark";
+@import "highlight/monokai";
+@import "highlight/solarized_dark";
+@import "highlight/solarized_light";
+@import "highlight/white";
 
 /*
  * Styles for JS behaviors.
diff --git a/app/assets/stylesheets/framework/dropdowns.scss b/app/assets/stylesheets/framework/dropdowns.scss
index cc74cb72795..cc5fac6816d 100644
--- a/app/assets/stylesheets/framework/dropdowns.scss
+++ b/app/assets/stylesheets/framework/dropdowns.scss
@@ -481,7 +481,8 @@
 
 .dropdown-menu-selectable {
   li {
-    a {
+    a,
+    button {
       padding: 8px 40px;
       position: relative;
 
diff --git a/app/assets/stylesheets/framework/snippets.scss b/app/assets/stylesheets/framework/snippets.scss
index 30c15c231d5..606d4675f19 100644
--- a/app/assets/stylesheets/framework/snippets.scss
+++ b/app/assets/stylesheets/framework/snippets.scss
@@ -29,8 +29,10 @@
 }
 
 .snippet-title {
-  font-size: 24px;
+  color: $gl-text-color;
+  font-size: 2em;
   font-weight: $gl-font-weight-bold;
+  min-height: $header-height;
 }
 
 .snippet-edited-ago {
@@ -46,3 +48,26 @@
 .snippet-scope-menu .btn-new {
   margin-top: 15px;
 }
+
+.snippet-embed-input {
+  height: 35px;
+}
+
+.embed-snippet {
+  padding-right: 0;
+  padding-top: $gl-padding;
+
+  .form-control {
+    cursor: auto;
+    width: 101%;
+    margin-left: -1px;
+  }
+
+  .embed-toggle-list li button {
+    padding: 8px 40px;
+  }
+
+  .embed-toggle {
+    height: 35px;
+  }
+}
diff --git a/app/assets/stylesheets/highlight/embedded.scss b/app/assets/stylesheets/highlight/embedded.scss
new file mode 100644
index 00000000000..44c8a1d39ec
--- /dev/null
+++ b/app/assets/stylesheets/highlight/embedded.scss
@@ -0,0 +1,3 @@
+.code {
+  @import "white_base";
+}
diff --git a/app/assets/stylesheets/highlight/white.scss b/app/assets/stylesheets/highlight/white.scss
index c3d8f0c61a2..355c8d223f7 100644
--- a/app/assets/stylesheets/highlight/white.scss
+++ b/app/assets/stylesheets/highlight/white.scss
@@ -1,292 +1,3 @@
-/* https://github.com/aahan/pygments-github-style */
-
-/*
-* White Syntax Colors
-*/
-$white-code-color: $gl-text-color;
-$white-highlight: #fafe3d;
-$white-pre-hll-bg: #f8eec7;
-$white-hll-bg: #f8f8f8;
-$white-over-bg: #ded7fc;
-$white-expanded-border: #e0e0e0;
-$white-expanded-bg: #f7f7f7;
-$white-c: #998;
-$white-err: #a61717;
-$white-err-bg: #e3d2d2;
-$white-cm: #998;
-$white-cp: #999;
-$white-c1: #998;
-$white-cs: #999;
-$white-gd: $black;
-$white-gd-bg: #fdd;
-$white-gd-x: $black;
-$white-gd-x-bg: #faa;
-$white-gr: #a00;
-$white-gh: #999;
-$white-gi: $black;
-$white-gi-bg: #dfd;
-$white-gi-x: $black;
-$white-gi-x-bg: #afa;
-$white-go: #888;
-$white-gp: #555;
-$white-gu: #800080;
-$white-gt: #a00;
-$white-kt: #458;
-$white-m: #099;
-$white-s: #d14;
-$white-n: #333;
-$white-na: teal;
-$white-nb: #0086b3;
-$white-nc: #458;
-$white-no: teal;
-$white-ni: purple;
-$white-ne: #900;
-$white-nf: #900;
-$white-nn: #555;
-$white-nt: navy;
-$white-nv: teal;
-$white-w: #bbb;
-$white-mf: #099;
-$white-mh: #099;
-$white-mi: #099;
-$white-mo: #099;
-$white-sb: #d14;
-$white-sc: #d14;
-$white-sd: #d14;
-$white-s2: #d14;
-$white-se: #d14;
-$white-sh: #d14;
-$white-si: #d14;
-$white-sx: #d14;
-$white-sr: #009926;
-$white-s1: #d14;
-$white-ss: #990073;
-$white-bp: #999;
-$white-vc: teal;
-$white-vg: teal;
-$white-vi: teal;
-$white-il: #099;
-$white-gc-color: #999;
-$white-gc-bg: #eaf2f5;
-
-
-@mixin matchLine {
-  color: $black-transparent;
-  background-color: $gray-light;
-}
-
 .code.white {
-  // Line numbers
-  .line-numbers,
-  .diff-line-num {
-    background-color: $gray-light;
-  }
-
-  .diff-line-num,
-  .diff-line-num a {
-    color: $black-transparent;
-  }
-
-  // Code itself
-  pre.code,
-  .diff-line-num {
-    border-color: $white-normal;
-  }
-
-  &,
-  pre.code,
-  .line_holder .line_content {
-    background-color: $white-light;
-    color: $white-code-color;
-  }
-
-  // Diff line
-  .line_holder {
-
-    &.match .line_content {
-      @include matchLine;
-    }
-
-    .diff-line-num {
-      &.old {
-        background-color: $line-number-old;
-        border-color: $line-removed-dark;
-
-        a {
-          color: scale-color($line-number-old, $red: -30%, $green: -30%, $blue: -30%);
-        }
-      }
-
-      &.new {
-        background-color: $line-number-new;
-        border-color: $line-added-dark;
-
-        a {
-          color: scale-color($line-number-new, $red: -30%, $green: -30%, $blue: -30%);
-        }
-      }
-
-      &.is-over,
-      &.hll:not(.empty-cell).is-over {
-        background-color: $white-over-bg;
-        border-color: darken($white-over-bg, 5%);
-
-        a {
-          color: darken($white-over-bg, 15%);
-        }
-      }
-
-      &.hll:not(.empty-cell) {
-        background-color: $line-number-select;
-        border-color: $line-select-yellow-dark;
-      }
-    }
-
-    &:not(.diff-expanded) + .diff-expanded,
-    &.diff-expanded + .line_holder:not(.diff-expanded) {
-      > .diff-line-num,
-      > .line_content {
-        border-top: 1px solid $white-expanded-border;
-      }
-    }
-
-    &.diff-expanded {
-      > .diff-line-num,
-      > .line_content {
-        background: $white-expanded-bg;
-        border-color: $white-expanded-bg;
-      }
-    }
-
-    .line_content {
-      &.old {
-        background-color: $line-removed;
-
-        &::before {
-          color: scale-color($line-number-old, $red: -30%, $green: -30%, $blue: -30%);
-        }
-
-        span.idiff {
-          background-color: $line-removed-dark;
-        }
-      }
-
-      &.new {
-        background-color: $line-added;
-
-        &::before {
-          color: scale-color($line-number-new, $red: -30%, $green: -30%, $blue: -30%);
-        }
-
-        span.idiff {
-          background-color: $line-added-dark;
-        }
-      }
-
-      &.match {
-        @include matchLine;
-      }
-
-      &.hll:not(.empty-cell) {
-        background-color: $line-select-yellow;
-      }
-    }
-  }
-
-  // highlight line via anchor
-  pre .hll {
-    background-color: $white-pre-hll-bg !important;
-  }
-
-  // Search result highlight
-  span.highlight_word {
-    background-color: $white-highlight !important;
-  }
-
-  // Links to URLs, emails, or dependencies
-  .line a {
-    color: $white-nb;
-  }
-
-  .hll { background-color: $white-hll-bg; }
-  .c { color: $white-c; font-style: italic; }
-  .err { color: $white-err; background-color: $white-err-bg; }
-  .k { font-weight: $gl-font-weight-bold; }
-  .o { font-weight: $gl-font-weight-bold; }
-  .cm { color: $white-cm; font-style: italic; }
-  .cp { color: $white-cp; font-weight: $gl-font-weight-bold; }
-  .c1 { color: $white-c1; font-style: italic; }
-  .cs { color: $white-cs; font-weight: $gl-font-weight-bold; font-style: italic; }
-
-  .gd {
-    color: $white-gd;
-    background-color: $white-gd-bg;
-
-    .x {
-      color: $white-gd-x;
-      background-color: $white-gd-x-bg;
-    }
-  }
-
-  .ge { font-style: italic; }
-  .gr { color: $white-gr; }
-  .gh { color: $white-gh; }
-
-  .gi {
-    color: $white-gi;
-    background-color: $white-gi-bg;
-
-    .x {
-      color: $white-gi-x;
-      background-color: $white-gi-x-bg;
-    }
-  }
-
-  .go { color: $white-go; }
-  .gp { color: $white-gp; }
-  .gs { font-weight: $gl-font-weight-bold; }
-  .gu { color: $white-gu; font-weight: $gl-font-weight-bold; }
-  .gt { color: $white-gt; }
-  .kc { font-weight: $gl-font-weight-bold; }
-  .kd { font-weight: $gl-font-weight-bold; }
-  .kn { font-weight: $gl-font-weight-bold; }
-  .kp { font-weight: $gl-font-weight-bold; }
-  .kr { font-weight: $gl-font-weight-bold; }
-  .kt { color: $white-kt; font-weight: $gl-font-weight-bold; }
-  .m { color: $white-m; }
-  .s { color: $white-s; }
-  .n { color: $white-n; }
-  .na { color: $white-na; }
-  .nb { color: $white-nb; }
-  .nc { color: $white-nc; font-weight: $gl-font-weight-bold; }
-  .no { color: $white-no; }
-  .ni { color: $white-ni; }
-  .ne { color: $white-ne; font-weight: $gl-font-weight-bold; }
-  .nf { color: $white-nf; font-weight: $gl-font-weight-bold; }
-  .nn { color: $white-nn; }
-  .nt { color: $white-nt; }
-  .nv { color: $white-nv; }
-  .ow { font-weight: $gl-font-weight-bold; }
-  .w { color: $white-w; }
-  .mf { color: $white-mf; }
-  .mh { color: $white-mh; }
-  .mi { color: $white-mi; }
-  .mo { color: $white-mo; }
-  .sb { color: $white-sb; }
-  .sc { color: $white-sc; }
-  .sd { color: $white-sd; }
-  .s2 { color: $white-s2; }
-  .se { color: $white-se; }
-  .sh { color: $white-sh; }
-  .si { color: $white-si; }
-  .sx { color: $white-sx; }
-  .sr { color: $white-sr; }
-  .s1 { color: $white-s1; }
-  .ss { color: $white-ss; }
-  .bp { color: $white-bp; }
-  .vc { color: $white-vc; }
-  .vg { color: $white-vg; }
-  .vi { color: $white-vi; }
-  .il { color: $white-il; }
-  .gc { color: $white-gc-color; background-color: $white-gc-bg; }
+  @import "white_base";
 }
diff --git a/app/assets/stylesheets/highlight/white_base.scss b/app/assets/stylesheets/highlight/white_base.scss
new file mode 100644
index 00000000000..8cc5252648d
--- /dev/null
+++ b/app/assets/stylesheets/highlight/white_base.scss
@@ -0,0 +1,290 @@
+/* https://github.com/aahan/pygments-github-style */
+
+/*
+* White Syntax Colors
+*/
+$white-code-color: $gl-text-color;
+$white-highlight: #fafe3d;
+$white-pre-hll-bg: #f8eec7;
+$white-hll-bg: #f8f8f8;
+$white-over-bg: #ded7fc;
+$white-expanded-border: #e0e0e0;
+$white-expanded-bg: #f7f7f7;
+$white-c: #998;
+$white-err: #a61717;
+$white-err-bg: #e3d2d2;
+$white-cm: #998;
+$white-cp: #999;
+$white-c1: #998;
+$white-cs: #999;
+$white-gd: $black;
+$white-gd-bg: #fdd;
+$white-gd-x: $black;
+$white-gd-x-bg: #faa;
+$white-gr: #a00;
+$white-gh: #999;
+$white-gi: $black;
+$white-gi-bg: #dfd;
+$white-gi-x: $black;
+$white-gi-x-bg: #afa;
+$white-go: #888;
+$white-gp: #555;
+$white-gu: #800080;
+$white-gt: #a00;
+$white-kt: #458;
+$white-m: #099;
+$white-s: #d14;
+$white-n: #333;
+$white-na: teal;
+$white-nb: #0086b3;
+$white-nc: #458;
+$white-no: teal;
+$white-ni: purple;
+$white-ne: #900;
+$white-nf: #900;
+$white-nn: #555;
+$white-nt: navy;
+$white-nv: teal;
+$white-w: #bbb;
+$white-mf: #099;
+$white-mh: #099;
+$white-mi: #099;
+$white-mo: #099;
+$white-sb: #d14;
+$white-sc: #d14;
+$white-sd: #d14;
+$white-s2: #d14;
+$white-se: #d14;
+$white-sh: #d14;
+$white-si: #d14;
+$white-sx: #d14;
+$white-sr: #009926;
+$white-s1: #d14;
+$white-ss: #990073;
+$white-bp: #999;
+$white-vc: teal;
+$white-vg: teal;
+$white-vi: teal;
+$white-il: #099;
+$white-gc-color: #999;
+$white-gc-bg: #eaf2f5;
+
+
+@mixin matchLine {
+  color: $black-transparent;
+  background-color: $gray-light;
+}
+
+  // Line numbers
+.line-numbers,
+.diff-line-num {
+  background-color: $gray-light;
+}
+
+.diff-line-num,
+.diff-line-num a {
+  color: $black-transparent;
+}
+
+// Code itself
+pre.code,
+.diff-line-num {
+  border-color: $white-normal;
+}
+
+&,
+pre.code,
+.line_holder .line_content {
+  background-color: $white-light;
+  color: $white-code-color;
+}
+
+// Diff line
+.line_holder {
+
+  &.match .line_content {
+    @include matchLine;
+  }
+
+  .diff-line-num {
+    &.old {
+      background-color: $line-number-old;
+      border-color: $line-removed-dark;
+
+      a {
+        color: scale-color($line-number-old, $red: -30%, $green: -30%, $blue: -30%);
+      }
+    }
+
+    &.new {
+      background-color: $line-number-new;
+      border-color: $line-added-dark;
+
+      a {
+        color: scale-color($line-number-new, $red: -30%, $green: -30%, $blue: -30%);
+      }
+    }
+
+    &.is-over,
+    &.hll:not(.empty-cell).is-over {
+      background-color: $white-over-bg;
+      border-color: darken($white-over-bg, 5%);
+
+      a {
+        color: darken($white-over-bg, 15%);
+      }
+    }
+
+    &.hll:not(.empty-cell) {
+      background-color: $line-number-select;
+      border-color: $line-select-yellow-dark;
+    }
+  }
+
+  &:not(.diff-expanded) + .diff-expanded,
+  &.diff-expanded + .line_holder:not(.diff-expanded) {
+    > .diff-line-num,
+    > .line_content {
+      border-top: 1px solid $white-expanded-border;
+    }
+  }
+
+  &.diff-expanded {
+    > .diff-line-num,
+    > .line_content {
+      background: $white-expanded-bg;
+      border-color: $white-expanded-bg;
+    }
+  }
+
+  .line_content {
+    &.old {
+      background-color: $line-removed;
+
+      &::before {
+        color: scale-color($line-number-old, $red: -30%, $green: -30%, $blue: -30%);
+      }
+
+      span.idiff {
+        background-color: $line-removed-dark;
+      }
+    }
+
+    &.new {
+      background-color: $line-added;
+
+      &::before {
+        color: scale-color($line-number-new, $red: -30%, $green: -30%, $blue: -30%);
+      }
+
+      span.idiff {
+        background-color: $line-added-dark;
+      }
+    }
+
+    &.match {
+      @include matchLine;
+    }
+
+    &.hll:not(.empty-cell) {
+      background-color: $line-select-yellow;
+    }
+  }
+}
+
+// highlight line via anchor
+pre .hll {
+  background-color: $white-pre-hll-bg !important;
+}
+
+  // Search result highlight
+span.highlight_word {
+  background-color: $white-highlight !important;
+}
+
+  // Links to URLs, emails, or dependencies
+.line a {
+  color: $white-nb;
+}
+
+.hll { background-color: $white-hll-bg; }
+.c { color: $white-c; font-style: italic; }
+.err { color: $white-err; background-color: $white-err-bg; }
+.k { font-weight: $gl-font-weight-bold; }
+.o { font-weight: $gl-font-weight-bold; }
+.cm { color: $white-cm; font-style: italic; }
+.cp { color: $white-cp; font-weight: $gl-font-weight-bold; }
+.c1 { color: $white-c1; font-style: italic; }
+.cs { color: $white-cs; font-weight: $gl-font-weight-bold; font-style: italic; }
+
+.gd {
+  color: $white-gd;
+  background-color: $white-gd-bg;
+
+  .x {
+    color: $white-gd-x;
+    background-color: $white-gd-x-bg;
+  }
+}
+
+.ge { font-style: italic; }
+.gr { color: $white-gr; }
+.gh { color: $white-gh; }
+
+.gi {
+  color: $white-gi;
+  background-color: $white-gi-bg;
+
+  .x {
+    color: $white-gi-x;
+    background-color: $white-gi-x-bg;
+  }
+}
+
+.go { color: $white-go; }
+.gp { color: $white-gp; }
+.gs { font-weight: $gl-font-weight-bold; }
+.gu { color: $white-gu; font-weight: $gl-font-weight-bold; }
+.gt { color: $white-gt; }
+.kc { font-weight: $gl-font-weight-bold; }
+.kd { font-weight: $gl-font-weight-bold; }
+.kn { font-weight: $gl-font-weight-bold; }
+.kp { font-weight: $gl-font-weight-bold; }
+.kr { font-weight: $gl-font-weight-bold; }
+.kt { color: $white-kt; font-weight: $gl-font-weight-bold; }
+.m { color: $white-m; }
+.s { color: $white-s; }
+.n { color: $white-n; }
+.na { color: $white-na; }
+.nb { color: $white-nb; }
+.nc { color: $white-nc; font-weight: $gl-font-weight-bold; }
+.no { color: $white-no; }
+.ni { color: $white-ni; }
+.ne { color: $white-ne; font-weight: $gl-font-weight-bold; }
+.nf { color: $white-nf; font-weight: $gl-font-weight-bold; }
+.nn { color: $white-nn; }
+.nt { color: $white-nt; }
+.nv { color: $white-nv; }
+.ow { font-weight: $gl-font-weight-bold; }
+.w { color: $white-w; }
+.mf { color: $white-mf; }
+.mh { color: $white-mh; }
+.mi { color: $white-mi; }
+.mo { color: $white-mo; }
+.sb { color: $white-sb; }
+.sc { color: $white-sc; }
+.sd { color: $white-sd; }
+.s2 { color: $white-s2; }
+.se { color: $white-se; }
+.sh { color: $white-sh; }
+.si { color: $white-si; }
+.sx { color: $white-sx; }
+.sr { color: $white-sr; }
+.s1 { color: $white-s1; }
+.ss { color: $white-ss; }
+.bp { color: $white-bp; }
+.vc { color: $white-vc; }
+.vg { color: $white-vg; }
+.vi { color: $white-vi; }
+.il { color: $white-il; }
+.gc { color: $white-gc-color; background-color: $white-gc-bg; }
diff --git a/app/assets/stylesheets/snippets.scss b/app/assets/stylesheets/snippets.scss
new file mode 100644
index 00000000000..0d6b0735f70
--- /dev/null
+++ b/app/assets/stylesheets/snippets.scss
@@ -0,0 +1,156 @@
+@import "framework/variables";
+
+.gitlab-embed-snippets {
+  @import "highlight/embedded";
+  @import "framework/images";
+
+  $border-style: 1px solid $border-color;
+
+  font-family: $regular_font;
+  font-size: $gl-font-size;
+  line-height: $code_line_height;
+  color: $gl-text-color;
+  margin: 20px;
+  font-weight: 200;
+
+  .gl-snippet-icon {
+    display: inline-block;
+    background: url(asset_path('ext_snippet_icons/ext_snippet_icons.png')) no-repeat;
+    overflow: hidden;
+    text-align: left;
+    width: 16px;
+    height: 16px;
+    background-size: cover;
+
+    &.gl-snippet-icon-doc_code { background-position: 0 0;  }
+    &.gl-snippet-icon-doc_text {  background-position: 0 -16px; }
+    &.gl-snippet-icon-download {  background-position: 0 -32px; }
+  }
+
+  .blob-viewer {
+    background-color: $white-light;
+    text-align: left;
+  }
+
+  .file-content.code {
+    border: $border-style;
+    border-radius: 0 0 4px 4px;
+    display: flex;
+    box-shadow: none;
+    margin: 0;
+    padding: 0;
+    table-layout: fixed;
+
+    .blob-content {
+      overflow-x: auto;
+
+      pre {
+        padding: 10px;
+        border: 0;
+        border-radius: 0;
+        font-family: $monospace_font;
+        font-size: $code_font_size;
+        line-height: $code_line_height;
+        margin: 0;
+        overflow: auto;
+        overflow-y: hidden;
+        white-space: pre;
+        word-wrap: normal;
+        border-left: $border-style;
+      }
+    }
+
+    .line-numbers {
+      padding: 10px;
+      text-align: right;
+      float: left;
+
+      .diff-line-num {
+        font-family: $monospace_font;
+        display: block;
+        font-size: $code_font_size;
+        min-height: $code_line_height;
+        white-space: nowrap;
+        color: $black-transparent;
+        min-width: 30px;
+      }
+
+      .diff-line-num:hover {
+        color: $almost-black;
+        cursor: pointer;
+      }
+    }
+  }
+
+  .file-title-flex-parent {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    background-color: $gray-light;
+    border: $border-style;
+    border-bottom: 0;
+    padding: $gl-padding-top $gl-padding;
+    margin: 0;
+    border-radius: $border-radius-default $border-radius-default 0 0;
+
+    .file-header-content {
+      .file-title-name {
+        font-weight: $gl-font-weight-bold;
+      }
+
+      .gitlab-embedded-snippets-title {
+        text-decoration: none;
+        color: $gl-text-color;
+
+        &:hover {
+          text-decoration: underline;
+        }
+      }
+
+      .gitlab-logo {
+        display: inline-block;
+        padding-left: 5px;
+        text-decoration: none;
+        color: $gl-text-color-secondary;
+
+        .logo-text {
+          background: image_url('ext_snippet_icons/logo.png') no-repeat left center;
+          background-size: 18px;
+          font-weight: $gl-font-weight-normal;
+          padding-left: 24px;
+        }
+      }
+    }
+
+    img,
+    .gl-snippet-icon {
+      display: inline-block;
+      vertical-align: middle;
+    }
+  }
+
+  .btn-group {
+    a.btn {
+      background-color: $white-light;
+      text-decoration: none;
+      padding: 7px 9px;
+      border: $border-style;
+      border-right: 0;
+
+      &:hover {
+        background-color: $white-normal;
+        border-color: $border-white-normal;
+        text-decoration: none;
+      }
+
+      &:first-child {
+        border-radius: 3px 0 0 3px;
+      }
+
+      &:last-child {
+        border-radius: 0 3px 3px 0;
+        border-right: $border-style;
+      }
+    }
+  }
+}
diff --git a/app/controllers/concerns/snippets_actions.rb b/app/controllers/concerns/snippets_actions.rb
index 9095cc7f783..120614739aa 100644
--- a/app/controllers/concerns/snippets_actions.rb
+++ b/app/controllers/concerns/snippets_actions.rb
@@ -17,6 +17,10 @@ module SnippetsActions
   end
   # rubocop:enable Gitlab/ModuleWithInstanceVariables
 
+  def js_request?
+    request.format.js?
+  end
+
   private
 
   def convert_line_endings(content)
diff --git a/app/controllers/projects/snippets_controller.rb b/app/controllers/projects/snippets_controller.rb
index 7c19aa7bb23..208a1d19862 100644
--- a/app/controllers/projects/snippets_controller.rb
+++ b/app/controllers/projects/snippets_controller.rb
@@ -5,6 +5,8 @@ class Projects::SnippetsController < Projects::ApplicationController
   include SnippetsActions
   include RendersBlob
 
+  skip_before_action :verify_authenticity_token, only: [:show], if: :js_request?
+
   before_action :check_snippets_available!
   before_action :snippet, only: [:show, :edit, :destroy, :update, :raw, :toggle_award_emoji, :mark_as_spam]
 
@@ -71,6 +73,7 @@ class Projects::SnippetsController < Projects::ApplicationController
       format.json do
         render_blob_json(blob)
       end
+      format.js { render 'shared/snippets/show'}
     end
   end
 
diff --git a/app/controllers/snippets_controller.rb b/app/controllers/snippets_controller.rb
index be2d3f638ff..3d51520ddf4 100644
--- a/app/controllers/snippets_controller.rb
+++ b/app/controllers/snippets_controller.rb
@@ -6,6 +6,8 @@ class SnippetsController < ApplicationController
   include RendersBlob
   include PreviewMarkdown
 
+  skip_before_action :verify_authenticity_token, only: [:show], if: :js_request?
+
   before_action :snippet, only: [:show, :edit, :destroy, :update, :raw]
 
   # Allow read snippet
@@ -77,6 +79,8 @@ class SnippetsController < ApplicationController
       format.json do
         render_blob_json(blob)
       end
+
+      format.js { render 'shared/snippets/show' }
     end
   end
 
diff --git a/app/helpers/icons_helper.rb b/app/helpers/icons_helper.rb
index c5522ff7a69..2f304b040c7 100644
--- a/app/helpers/icons_helper.rb
+++ b/app/helpers/icons_helper.rb
@@ -43,6 +43,10 @@ module IconsHelper
     content_tag(:svg, content_tag(:use, "", { "xlink:href" => "#{sprite_icon_path}##{icon_name}" } ), class: css_classes.empty? ? nil : css_classes)
   end
 
+  def external_snippet_icon(name)
+    content_tag(:span, "", class: "gl-snippet-icon gl-snippet-icon-#{name}")
+  end
+
   def audit_icon(names, options = {})
     case names
     when "standard"
diff --git a/app/helpers/snippets_helper.rb b/app/helpers/snippets_helper.rb
index 00e7e4230b9..733832c1bbb 100644
--- a/app/helpers/snippets_helper.rb
+++ b/app/helpers/snippets_helper.rb
@@ -101,4 +101,39 @@ module SnippetsHelper
     # Return snippet with chunk array
     { snippet_object: snippet, snippet_chunks: snippet_chunks }
   end
+
+  def snippet_embed
+    "<script src=\"#{url_for(only_path: false, overwrite_params: nil)}.js\"></script>"
+  end
+
+  def embedded_snippet_raw_button
+    blob = @snippet.blob
+    return if blob.empty? || blob.raw_binary? || blob.stored_externally?
+
+    snippet_raw_url = if @snippet.is_a?(PersonalSnippet)
+                        raw_snippet_url(@snippet)
+                      else
+                        raw_project_snippet_url(@snippet.project, @snippet)
+                      end
+
+    link_to external_snippet_icon('doc_code'), snippet_raw_url, class: 'btn', target: '_blank', rel: 'noopener noreferrer', title: 'Open raw'
+  end
+
+  def embedded_snippet_download_button
+    download_url = if @snippet.is_a?(PersonalSnippet)
+                     raw_snippet_url(@snippet, inline: false)
+                   else
+                     raw_project_snippet_url(@snippet.project, @snippet, inline: false)
+                   end
+
+    link_to external_snippet_icon('download'), download_url, class: 'btn', target: '_blank', title: 'Download', rel: 'noopener noreferrer'
+  end
+
+  def public_snippet?
+    if @snippet.project_id?
+      can?(nil, :read_project_snippet, @snippet)
+    else
+      can?(nil, :read_personal_snippet, @snippet)
+    end
+  end
 end
diff --git a/app/views/projects/blob/_viewer.html.haml b/app/views/projects/blob/_viewer.html.haml
index 3124443b4e4..9c760c81527 100644
--- a/app/views/projects/blob/_viewer.html.haml
+++ b/app/views/projects/blob/_viewer.html.haml
@@ -2,6 +2,7 @@
 - render_error = viewer.render_error
 - rich_type = viewer.type == :rich ? viewer.partial_name : nil
 - load_async = local_assigns.fetch(:load_async, viewer.load_async? && render_error.nil?)
+- external_embed = local_assigns.fetch(:external_embed, false)
 
 - viewer_url = local_assigns.fetch(:viewer_url) { url_for(params.merge(viewer: viewer.type, format: :json)) } if load_async
 .blob-viewer{ data: { type: viewer.type, rich_type: rich_type, url: viewer_url }, class: ('hidden' if hidden) }
@@ -9,6 +10,8 @@
     = render 'projects/blob/render_error', viewer: viewer
   - elsif load_async
     = render viewer.loading_partial_path, viewer: viewer
+  - elsif external_embed
+    = render 'projects/blob/viewers/highlight_embed', blob: viewer.blob
   - else
     - viewer.prepare!
 
diff --git a/app/views/projects/blob/viewers/_highlight_embed.html.haml b/app/views/projects/blob/viewers/_highlight_embed.html.haml
new file mode 100644
index 00000000000..9bd4ef6ad0b
--- /dev/null
+++ b/app/views/projects/blob/viewers/_highlight_embed.html.haml
@@ -0,0 +1,7 @@
+.file-content.code.js-syntax-highlight
+  .line-numbers
+    - if blob.data.present?
+      - blob.data.each_line.each_with_index do |_, index|
+        %span.diff-line-num= index + 1
+  .blob-content{ data: { blob_id: blob.id } }
+    = highlight(blob.path, blob.data, repository: nil, plain: blob.no_highlighting?)
diff --git a/app/views/shared/snippets/_embed.html.haml b/app/views/shared/snippets/_embed.html.haml
new file mode 100644
index 00000000000..2d93e51a2d9
--- /dev/null
+++ b/app/views/shared/snippets/_embed.html.haml
@@ -0,0 +1,24 @@
+- blob = @snippet.blob
+.gitlab-embed-snippets
+  .js-file-title.file-title-flex-parent
+    .file-header-content
+      = external_snippet_icon('doc_text')
+
+      %strong.file-title-name
+        %a.gitlab-embedded-snippets-title{ href: url_for(only_path: false, overwrite_params: nil) }
+          = blob.name
+
+      %small
+        = number_to_human_size(blob.raw_size)
+      %a.gitlab-logo{ href: url_for(only_path: false, overwrite_params: nil), title: 'view on gitlab' }
+        on &nbsp;
+        %span.logo-text
+          GitLab
+
+    .file-actions.hidden-xs
+      .btn-group{ role: "group" }<
+        = embedded_snippet_raw_button
+
+        = embedded_snippet_download_button
+  %article.file-holder.snippet-file-content
+    = render 'projects/blob/viewer', viewer: @snippet.blob.simple_viewer, load_async: false, external_embed: true
diff --git a/app/views/shared/snippets/_header.html.haml b/app/views/shared/snippets/_header.html.haml
index 12df79a28c7..836230ae8ee 100644
--- a/app/views/shared/snippets/_header.html.haml
+++ b/app/views/shared/snippets/_header.html.haml
@@ -19,11 +19,32 @@
   %h2.snippet-title.prepend-top-0.append-bottom-0
     = markdown_field(@snippet, :title)
 
-  - if @snippet.updated_at != @snippet.created_at
-    = edited_time_ago_with_tooltip(@snippet, placement: 'bottom', html_class: 'snippet-edited-ago', exclude_author: true)
   - if @snippet.description.present?
     .description
       .wiki
         = markdown_field(@snippet, :description)
       %textarea.hidden.js-task-list-field
         = @snippet.description
+
+  - if @snippet.updated_at != @snippet.created_at
+    = edited_time_ago_with_tooltip(@snippet, placement: 'bottom', html_class: 'snippet-edited-ago', exclude_author: true)
+
+  - if public_snippet?
+    .embed-snippet
+      .input-group
+        .input-group-btn
+          %button.btn.embed-toggle{ 'data-toggle': 'dropdown', type: 'button' }
+            %span.js-embed-action= _("Embed")
+            = sprite_icon('angle-down', size: 12)
+          %ul.dropdown-menu.dropdown-menu-selectable.embed-toggle-list
+            %li
+              %button.js-embed-btn.btn.btn-transparent.is-active{ type: 'button' }
+                %strong.embed-toggle-list-item= _("Embed")
+            %li
+              %button.js-share-btn.btn.btn-transparent{ type: 'button' }
+                %strong.embed-toggle-list-item= _("Share")
+        %input.js-snippet-url-area.snippet-embed-input.form-control{ type: "text", autocomplete: 'off', value: snippet_embed }
+        .input-group-btn
+          %button.js-clipboard-btn.btn.btn-default.has-tooltip{ title: "Copy to clipboard", 'data-clipboard-target': '#snippet-url-area' }
+            = sprite_icon('duplicate', size: 16)
+    .clearfix
diff --git a/app/views/shared/snippets/show.js.haml b/app/views/shared/snippets/show.js.haml
new file mode 100644
index 00000000000..a9af732bbb5
--- /dev/null
+++ b/app/views/shared/snippets/show.js.haml
@@ -0,0 +1,2 @@
+document.write('#{escape_javascript(stylesheet_link_tag "#{stylesheet_url 'snippets'}")}');
+document.write('#{escape_javascript(render 'shared/snippets/embed')}');
diff --git a/changelogs/unreleased/8088_embedded_snippets_support.yml b/changelogs/unreleased/8088_embedded_snippets_support.yml
new file mode 100644
index 00000000000..7bd77a69dbd
--- /dev/null
+++ b/changelogs/unreleased/8088_embedded_snippets_support.yml
@@ -0,0 +1,5 @@
+---
+title: Adds Embedded Snippets Support
+merge_request: 15695
+author: haseebeqx
+type: added
diff --git a/config/application.rb b/config/application.rb
index 13501d4bdb5..ad7338763f7 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -113,6 +113,7 @@ module Gitlab
     config.assets.precompile << "performance_bar.css"
     config.assets.precompile << "lib/ace.js"
     config.assets.precompile << "test.css"
+    config.assets.precompile << "snippets.css"
     config.assets.precompile << "locale/**/app.js"
 
     # Import gitlab-svgs directly from vendored directory
diff --git a/spec/features/snippets/embedded_snippet_spec.rb b/spec/features/snippets/embedded_snippet_spec.rb
new file mode 100644
index 00000000000..ab661f6fc69
--- /dev/null
+++ b/spec/features/snippets/embedded_snippet_spec.rb
@@ -0,0 +1,25 @@
+require 'spec_helper'
+
+describe 'Embedded Snippets' do
+  let(:snippet) { create(:personal_snippet, :public, file_name: 'random_dir.rb', content: content) }
+  let(:content) { "require 'fileutils'\nFileUtils.mkdir_p 'some/random_dir'\n" }
+
+  it 'loads snippet', :js do
+    script_url = "http://#{Capybara.current_session.server.host}:#{Capybara.current_session.server.port}/#{snippet_path(snippet, format: 'js')}"
+    embed_body = "<html><body><script src=\"#{script_url}\"></script></body></html>"
+
+    rack_app = proc do
+      ['200', { 'Content-Type' => 'text/html' }, [embed_body]]
+    end
+
+    server = Capybara::Server.new(rack_app)
+    server.boot
+
+    visit("http://#{server.host}:#{server.port}/embedded_snippet.html")
+
+    expect(page).to have_content("random_dir.rb")
+    expect(page).to have_content("require 'fileutils'")
+    expect(page).to have_link('Open raw')
+    expect(page).to have_link('Download')
+  end
+end
diff --git a/spec/helpers/icons_helper_spec.rb b/spec/helpers/icons_helper_spec.rb
index 2f23ed55d99..93d8e672f8c 100644
--- a/spec/helpers/icons_helper_spec.rb
+++ b/spec/helpers/icons_helper_spec.rb
@@ -162,4 +162,11 @@ describe IconsHelper do
       expect(file_type_icon_class('file', 0, 'CHANGELOG')).to eq 'file-text-o'
     end
   end
+
+  describe '#external_snippet_icon' do
+    it 'returns external snippet icon' do
+      expect(external_snippet_icon('download').to_s)
+        .to eq("<span class=\"gl-snippet-icon gl-snippet-icon-download\"></span>")
+    end
+  end
 end
diff --git a/spec/helpers/snippets_helper_spec.rb b/spec/helpers/snippets_helper_spec.rb
new file mode 100644
index 00000000000..0323ffb641c
--- /dev/null
+++ b/spec/helpers/snippets_helper_spec.rb
@@ -0,0 +1,33 @@
+require 'spec_helper'
+
+describe SnippetsHelper do
+  include IconsHelper
+
+  describe '#embedded_snippet_raw_button' do
+    it 'gives view raw button of embedded snippets for project snippets' do
+      @snippet = create(:project_snippet, :public)
+
+      expect(embedded_snippet_raw_button.to_s).to eq("<a class=\"btn\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Open raw\" href=\"#{raw_project_snippet_url(@snippet.project, @snippet)}\">#{external_snippet_icon('doc_code')}</a>")
+    end
+
+    it 'gives view raw button of embedded snippets for personal snippets' do
+      @snippet = create(:personal_snippet, :public)
+
+      expect(embedded_snippet_raw_button.to_s).to eq("<a class=\"btn\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Open raw\" href=\"#{raw_snippet_url(@snippet)}\">#{external_snippet_icon('doc_code')}</a>")
+    end
+  end
+
+  describe '#embedded_snippet_download_button' do
+    it 'gives download button of embedded snippets for project snippets' do
+      @snippet = create(:project_snippet, :public)
+
+      expect(embedded_snippet_download_button.to_s).to eq("<a class=\"btn\" target=\"_blank\" title=\"Download\" rel=\"noopener noreferrer\" href=\"#{raw_project_snippet_url(@snippet.project, @snippet, inline: false)}\">#{external_snippet_icon('download')}</a>")
+    end
+
+    it 'gives download button of embedded snippets for personal snippets' do
+      @snippet = create(:personal_snippet, :public)
+
+      expect(embedded_snippet_download_button.to_s).to eq("<a class=\"btn\" target=\"_blank\" title=\"Download\" rel=\"noopener noreferrer\" href=\"#{raw_snippet_url(@snippet, inline: false)}\">#{external_snippet_icon('download')}</a>")
+    end
+  end
+end