Improve inline comment previews

Summary:
  - When an inline comment preview corresponds to an inline comment on the page, link to it. Just punt in the tough case where the inline is on some other page.
  - In "haunted" mode, "z" now toggles through three modes: normal, comment area only, and comment + previews.

Test Plan:
  - Viewed visible and not-visible inline comment previews, clicked "View" links.
  - Tapped "z" a bunch to toggle haunt modes.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T517, T214

Differential Revision: https://secure.phabricator.com/D2041

src/applications/differential/view/inlinecomment/DifferentialInlineCommentView.php

@@ -136,6 +136,8 @@ final class DifferentialInlineCommentView extends AphrontView {
       }
     }
 
+    $anchor_name = 'inline-'.$inline->getID();
+
     if ($this->editable && !$this->preview) {
       $links[] = javelin_render_tag(
         'a',
@@ -153,6 +155,16 @@ final class DifferentialInlineCommentView extends AphrontView {
           'sigil'       => 'differential-inline-delete',
         ),
         'Delete');
+    } else if ($this->preview) {
+      $links[] = javelin_render_tag(
+        'a',
+        array(
+          'meta'        => array(
+            'anchor' => $anchor_name,
+          ),
+          'sigil'       => 'differential-inline-preview-jump',
+        ),
+        'Not Visible');
     }
 
     if ($links) {
@@ -178,8 +190,9 @@ final class DifferentialInlineCommentView extends AphrontView {
       }
     }
 
-    $anchor_name = 'inline-'.$inline->getID();
-
+    if ($this->preview) {
+      $anchor = null;
+    } else {
       $anchor = phutil_render_tag(
         'a',
         array(
@@ -188,6 +201,7 @@ final class DifferentialInlineCommentView extends AphrontView {
           'class'   => 'differential-inline-comment-anchor',
         ),
         '');
+    }
 
     $classes = array(
       'differential-inline-comment',

webroot/rsrc/css/application/differential/revision-comment.css

@@ -10,8 +10,14 @@
   max-width: 1162px;
 }
 
-/* Spooky haunted panel which floats on the bottom of the screen. */
-.differential-haunted-panel .differential-add-comment-panel {
+/*  Spooky haunted panel which floats on the bottom of the screen.
+    Haunt modes are:
+
+      - Mode 1: Just the comment box.
+      - Mode 2: Comment box, comment preview, and inline comment previews.
+*/
+.differential-haunt-mode-1 .differential-add-comment-panel,
+.differential-haunt-mode-2 .differential-add-comment-panel {
   position: fixed;
   width: 100%;
   bottom: 0;
@@ -28,15 +34,20 @@
 
 }
 
-.differential-haunted-panel .differential-add-comment-panel h1 {
+.differential-haunt-mode-2 .differential-add-comment-panel {
+  max-height: 75%;
+}
+
+.differential-haunt-mode-1 .differential-add-comment-panel h1,
+.differential-haunt-mode-2 .differential-add-comment-panel h1 {
   display: none;
 }
 
-.differential-haunted-panel .aphront-panel-preview {
+.differential-haunt-mode-1 .aphront-panel-preview {
   display: none;
 }
 
-.differential-haunted-panel {
+.differential-haunt-mode-1 {
   padding-bottom: 250px;
 }
 

webroot/rsrc/js/application/differential/behavior-comment-preview.js

@@ -47,7 +47,27 @@ JX.behavior('differential-feedback-preview', function(config) {
 
   function refreshInlinePreview() {
     new JX.Request(config.inlineuri, function(r) {
-        JX.DOM.setContent(JX.$(config.inline), JX.$H(r));
+        var inline = JX.$(config.inline);
+
+        JX.DOM.setContent(inline, JX.$H(r));
+
+        // Go through the previews and activate any "View" links where the
+        // actual comment appears in the document.
+
+        var links = JX.DOM.scry(
+          inline,
+          'a',
+          'differential-inline-preview-jump');
+        for (var ii = 0; ii < links.length; ii++) {
+          var data = JX.Stratcom.getData(links[ii]);
+          try {
+            JX.$(data.anchor);
+            links[ii].href = '#' + data.anchor;
+            JX.DOM.setContent(links[ii], 'View');
+          } catch (ignored) {
+            // This inline comment isn't visible, e.g. on some other diff.
+          }
+        }
       })
       .setTimeout(5000)
       .send();

webroot/rsrc/js/application/differential/behavior-keyboard-nav.js

@@ -150,11 +150,14 @@ JX.behavior('differential-keyboard-navigation', function(config) {
       changesets = null;
     });
 
-  var is_haunted = false;
+  var haunt_mode = 0;
   function haunt() {
-    is_haunted = !is_haunted;
-    var haunt = JX.$(config.haunt)
-    JX.DOM.alterClass(haunt, 'differential-haunted-panel', is_haunted);
+    haunt_mode = (haunt_mode + 1) % 3;
+
+    var el = JX.$(config.haunt);
+    for (var ii = 1; ii <= 2; ii++) {
+      JX.DOM.alterClass(el, 'differential-haunt-mode-'+ii, (haunt_mode == ii));
+    }
   }
 
   new JX.KeyboardShortcut('j', 'Jump to next change.')
@@ -221,7 +224,7 @@ JX.behavior('differential-keyboard-navigation', function(config) {
     .register();
 
   if (config.haunt) {
-    new JX.KeyboardShortcut('z', 'Haunt / unhaunt comment panel.')
+    new JX.KeyboardShortcut('z', 'Cycle comment panel haunting modes.')
       .setHandler(haunt)
       .register();
   }