Provide a web interface to view raw source text in Differential

Summary:
Add links to the 'standalone view' to grab the raw source text. I think this
operation is rare enough that it's okay to hide it like this. I changed
'Standalone View' to 'View Standalone / Raw' to improve discoverability.

This also fixes the broken Standalone View links in Diffusion by no longer
rendering them.

Test Plan:
viewed old and new sources for a changeset

Reviewed By: tuomaspelkonen
Reviewers: tuomaspelkonen, jungejason, aran
CC: aran, tuomaspelkonen
Differential Revision: 243

src/__celerity_resource_map__.php

@@ -136,7 +136,7 @@ celerity_register_resource_map(array(
   ),
   'differential-changeset-view-css' =>
   array(
-    'uri' => '/res/f26ca6f9/rsrc/css/application/differential/changeset-view.css',
+    'uri' => '/res/32a8bac6/rsrc/css/application/differential/changeset-view.css',
     'type' => 'css',
     'requires' =>
     array(
@@ -690,7 +690,7 @@ celerity_register_resource_map(array(
       'uri' => '/res/pkg/6c786373/differential.pkg.js',
       'type' => 'js',
     ),
-    '8d8a971a' =>
+    '8e4ef51b' =>
     array (
       'name' => 'differential.pkg.css',
       'symbols' =>
@@ -704,7 +704,7 @@ celerity_register_resource_map(array(
         6 => 'differential-revision-add-comment-css',
         7 => 'differential-revision-comment-list-css',
       ),
-      'uri' => '/res/pkg/8d8a971a/differential.pkg.css',
+      'uri' => '/res/pkg/8e4ef51b/differential.pkg.css',
       'type' => 'css',
     ),
     'eadf6ec3' =>
@@ -728,14 +728,14 @@ celerity_register_resource_map(array(
     'aphront-table-view-css' => '4270730a',
     'aphront-tokenizer-control-css' => '4270730a',
     'aphront-typeahead-control-css' => '4270730a',
-    'differential-changeset-view-css' => '8d8a971a',
-    'differential-core-view-css' => '8d8a971a',
-    'differential-revision-add-comment-css' => '8d8a971a',
-    'differential-revision-comment-css' => '8d8a971a',
-    'differential-revision-comment-list-css' => '8d8a971a',
-    'differential-revision-detail-css' => '8d8a971a',
-    'differential-revision-history-css' => '8d8a971a',
-    'differential-table-of-contents-css' => '8d8a971a',
+    'differential-changeset-view-css' => '8e4ef51b',
+    'differential-core-view-css' => '8e4ef51b',
+    'differential-revision-add-comment-css' => '8e4ef51b',
+    'differential-revision-comment-css' => '8e4ef51b',
+    'differential-revision-comment-list-css' => '8e4ef51b',
+    'differential-revision-detail-css' => '8e4ef51b',
+    'differential-revision-history-css' => '8e4ef51b',
+    'differential-table-of-contents-css' => '8e4ef51b',
     'diffusion-commit-view-css' => 'eadf6ec3',
     'javelin-behavior-differential-diff-radios' => '6c786373',
     'javelin-behavior-differential-edit-inline-comments' => '6c786373',

src/applications/differential/controller/changesetview/DifferentialChangesetViewController.php

@@ -33,6 +33,19 @@ class DifferentialChangesetViewController extends DifferentialController {
       return new Aphront404Response();
     }
 
+    $view = $request->getStr('view');
+    if ($view) {
+      $changeset->attachHunks($changeset->loadHunks());
+      switch ($view) {
+        case 'new':
+          return $this->buildRawFileResponse($changeset->makeNewFile());
+        case 'old':
+          return $this->buildRawFileResponse($changeset->makeOldFile());
+        default:
+          return new Aphront400Response();
+      }
+    }
+
     if ($vs && ($vs != -1)) {
       $vs_changeset = id(new DifferentialChangeset())->load($vs);
       if (!$vs_changeset) {
@@ -177,6 +190,26 @@ class DifferentialChangesetViewController extends DifferentialController {
     $detail = new DifferentialChangesetDetailView();
     $detail->setChangeset($changeset);
     $detail->appendChild($output);
+
+    if (!$vs) {
+      $detail->addButton(
+        phutil_render_tag(
+          'a',
+          array(
+            'href' => $request->getRequestURI()->alter('view', 'old'),
+            'class' => 'grey button small',
+          ),
+          'View Raw File (Old Version)'));
+      $detail->addButton(
+        phutil_render_tag(
+          'a',
+          array(
+            'href' => $request->getRequestURI()->alter('view', 'new'),
+            'class' => 'grey button small',
+          ),
+          'View Raw File (New Version)'));
+    }
+
     $detail->setRevisionID($request->getInt('revision_id'));
 
     $output =
@@ -202,5 +235,10 @@ class DifferentialChangesetViewController extends DifferentialController {
       $author_phid);
   }
 
+  private function buildRawFileResponse($text) {
+    return id(new AphrontFileResponse())
+      ->setMimeType('text/plain')
+      ->setContent($text);
+  }
 
 }

src/applications/differential/controller/changesetview/__init__.php

@@ -8,8 +8,10 @@
 
 phutil_require_module('arcanist', 'parser/diff');
 
+phutil_require_module('phabricator', 'aphront/response/400');
 phutil_require_module('phabricator', 'aphront/response/404');
 phutil_require_module('phabricator', 'aphront/response/ajax');
+phutil_require_module('phabricator', 'aphront/response/file');
 phutil_require_module('phabricator', 'applications/differential/controller/base');
 phutil_require_module('phabricator', 'applications/differential/parser/changeset');
 phutil_require_module('phabricator', 'applications/differential/parser/markup');
@@ -23,6 +25,7 @@ phutil_require_module('phabricator', 'infrastructure/javelin/api');
 phutil_require_module('phutil', 'filesystem');
 phutil_require_module('phutil', 'filesystem/tempfile');
 phutil_require_module('phutil', 'future/exec');
+phutil_require_module('phutil', 'markup');
 phutil_require_module('phutil', 'utils');
 
 

src/applications/differential/controller/revisionview/DifferentialRevisionViewController.php

@@ -179,6 +179,7 @@ class DifferentialRevisionViewController extends DifferentialController {
     $changeset_view = new DifferentialChangesetListView();
     $changeset_view->setChangesets($visible_changesets);
     $changeset_view->setEditable(true);
+    $changeset_view->setStandaloneViews(true);
     $changeset_view->setRevision($revision);
     $changeset_view->setVsMap($vs_map);
     $changeset_view->setWhitespace($whitespace);

src/applications/differential/view/changesetdetailview/DifferentialChangesetDetailView.php

@@ -53,6 +53,14 @@ class DifferentialChangesetDetailView extends AphrontView {
       $class .= ' differential-changeset-immutable';
     }
 
+    $buttons = null;
+    if ($this->buttons) {
+      $buttons =
+        '<div class="differential-changeset-buttons">'.
+          implode('', $this->buttons).
+        '</div>';
+    }
+
     $display_filename = $changeset->getDisplayFilename();
     $output = javelin_render_tag(
       'div',
@@ -70,7 +78,7 @@ class DifferentialChangesetDetailView extends AphrontView {
           'name' => $changeset->getAnchorName(),
         ),
         '').
-      implode('', $this->buttons).
+      $buttons.
       '<h1>'.phutil_escape_html($display_filename).'</h1>'.
       '<div style="clear: both;"></div>'.
       $this->renderChildren());

src/applications/differential/view/changesetlistview/DifferentialChangesetListView.php

@@ -24,6 +24,7 @@ class DifferentialChangesetListView extends AphrontView {
   private $renderURI = '/differential/changeset/';
   private $vsMap = array();
   private $whitespace;
+  private $standaloneViews;
 
   public function setChangesets($changesets) {
     $this->changesets = $changesets;
@@ -35,6 +36,11 @@ class DifferentialChangesetListView extends AphrontView {
     return $this;
   }
 
+  public function setStandaloneViews($has_standalone_views) {
+    $this->standaloneViews = $has_standalone_views;
+    return $this;
+  }
+
   public function setRevision(DifferentialRevision $revision) {
     $this->revision = $revision;
     return $this;
@@ -78,6 +84,8 @@ class DifferentialChangesetListView extends AphrontView {
 
       $ref = $changeset->getRenderingReference();
 
+      $detail_button = null;
+      if ($this->standaloneViews) {
         $detail_uri = new PhutilURI($this->renderURI);
         $detail_uri->setQueryParams(
           array(
@@ -89,12 +97,12 @@ class DifferentialChangesetListView extends AphrontView {
         $detail_button = phutil_render_tag(
           'a',
           array(
-          'style'   => 'float: right',
             'class'   => 'button small grey',
             'href'    => $detail_uri,
             'target'  => '_blank',
           ),
-        'Standalone View');
+          'View Standalone / Raw');
+      }
 
       $uniq_id = celerity_generate_unique_node_id();
 

webroot/rsrc/css/application/differential/changeset-view.css

@@ -172,3 +172,11 @@
   width: 100%;
   height: 12em;
 }
+
+.differential-changeset-buttons {
+  float: right;
+}
+
+.differential-changeset-buttons a.button {
+  margin-left: 8px;
+}