Add a standalone view for browsing changesets of very large revisions

Summary: Ref T13110. Installs have various reasons for sending unreviewable changes (changes where the text of the change will never be reviewed by a human) through Differential anyway. Prepare for accommodating this more gracefully by building a standalone changeset list page which paginates the changesets.

Test Plan: Clicked the new "Changeset List" button on a revision, was taken to a separate page.

Maniphest Tasks: T13110

Differential Revision: https://secure.phabricator.com/D19295

src/__phutil_library_map__.php

@@ -389,6 +389,7 @@ phutil_register_library_map(array(
     'DifferentialChangesetDetailView' => 'applications/differential/view/DifferentialChangesetDetailView.php',
     'DifferentialChangesetFileTreeSideNavBuilder' => 'applications/differential/view/DifferentialChangesetFileTreeSideNavBuilder.php',
     'DifferentialChangesetHTMLRenderer' => 'applications/differential/render/DifferentialChangesetHTMLRenderer.php',
+    'DifferentialChangesetListController' => 'applications/differential/controller/DifferentialChangesetListController.php',
     'DifferentialChangesetListView' => 'applications/differential/view/DifferentialChangesetListView.php',
     'DifferentialChangesetOneUpMailRenderer' => 'applications/differential/render/DifferentialChangesetOneUpMailRenderer.php',
     'DifferentialChangesetOneUpRenderer' => 'applications/differential/render/DifferentialChangesetOneUpRenderer.php',
@@ -397,6 +398,7 @@ phutil_register_library_map(array(
     'DifferentialChangesetParserTestCase' => 'applications/differential/parser/__tests__/DifferentialChangesetParserTestCase.php',
     'DifferentialChangesetQuery' => 'applications/differential/query/DifferentialChangesetQuery.php',
     'DifferentialChangesetRenderer' => 'applications/differential/render/DifferentialChangesetRenderer.php',
+    'DifferentialChangesetSearchEngine' => 'applications/differential/query/DifferentialChangesetSearchEngine.php',
     'DifferentialChangesetTestRenderer' => 'applications/differential/render/DifferentialChangesetTestRenderer.php',
     'DifferentialChangesetTwoUpRenderer' => 'applications/differential/render/DifferentialChangesetTwoUpRenderer.php',
     'DifferentialChangesetTwoUpTestRenderer' => 'applications/differential/render/DifferentialChangesetTwoUpTestRenderer.php',
@@ -5605,6 +5607,7 @@ phutil_register_library_map(array(
     'DifferentialChangesetDetailView' => 'AphrontView',
     'DifferentialChangesetFileTreeSideNavBuilder' => 'Phobject',
     'DifferentialChangesetHTMLRenderer' => 'DifferentialChangesetRenderer',
+    'DifferentialChangesetListController' => 'DifferentialController',
     'DifferentialChangesetListView' => 'AphrontView',
     'DifferentialChangesetOneUpMailRenderer' => 'DifferentialChangesetRenderer',
     'DifferentialChangesetOneUpRenderer' => 'DifferentialChangesetHTMLRenderer',
@@ -5613,6 +5616,7 @@ phutil_register_library_map(array(
     'DifferentialChangesetParserTestCase' => 'PhabricatorTestCase',
     'DifferentialChangesetQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'DifferentialChangesetRenderer' => 'Phobject',
+    'DifferentialChangesetSearchEngine' => 'PhabricatorApplicationSearchEngine',
     'DifferentialChangesetTestRenderer' => 'DifferentialChangesetRenderer',
     'DifferentialChangesetTwoUpRenderer' => 'DifferentialChangesetHTMLRenderer',
     'DifferentialChangesetTwoUpTestRenderer' => 'DifferentialChangesetTestRenderer',

src/applications/differential/application/PhabricatorDifferentialApplication.php

@@ -52,7 +52,13 @@ final class PhabricatorDifferentialApplication extends PhabricatorApplication {
         '(?:query/(?P<queryKey>[^/]+)/)?'
           => 'DifferentialRevisionListController',
         'diff/' => array(
-          '(?P<id>[1-9]\d*)/' => 'DifferentialDiffViewController',
+          '(?P<id>[1-9]\d*)/' => array(
+            '' => 'DifferentialDiffViewController',
+            'changesets/' => array(
+              $this->getQueryRoutePattern()
+                => 'DifferentialChangesetListController',
+            ),
+          ),
           'create/' => 'DifferentialDiffCreateController',
         ),
         'changeset/' => 'DifferentialChangesetViewController',

src/applications/differential/controller/DifferentialChangesetListController.php

@@ -0,0 +1,51 @@
+<?php
+
+final class DifferentialChangesetListController
+  extends DifferentialController {
+
+  private $diff;
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $this->getViewer();
+
+    $diff = id(new DifferentialDiffQuery())
+      ->setViewer($viewer)
+      ->withIDs(array($request->getURIData('id')))
+      ->executeOne();
+    if (!$diff) {
+      return new Aphront404Response();
+    }
+    $this->diff = $diff;
+
+    return id(new DifferentialChangesetSearchEngine())
+      ->setController($this)
+      ->setDiff($diff)
+      ->buildResponse();
+  }
+
+  protected function buildApplicationCrumbs() {
+    $crumbs = parent::buildApplicationCrumbs();
+
+    $diff = $this->diff;
+    if ($diff) {
+      $revision = $diff->getRevision();
+      if ($revision) {
+        $crumbs->addTextCrumb(
+          $revision->getMonogram(),
+          $revision->getURI());
+      }
+
+      $crumbs->addTextCrumb(
+        pht('Diff %d', $diff->getID()),
+        $diff->getURI());
+    }
+
+    return $crumbs;
+  }
+
+
+}

src/applications/differential/controller/DifferentialRevisionViewController.php

@@ -399,8 +399,18 @@ final class DifferentialRevisionViewController extends DifferentialController {
           ->appendChild($other_view));
     }
 
+    $view_button = id(new PHUIButtonView())
+      ->setTag('a')
+      ->setText(pht('Changeset List'))
+      ->setHref('/differential/diff/'.$target->getID().'/changesets/')
+      ->setIcon('fa-align-left');
+
+    $tab_header = id(new PHUIHeaderView())
+      ->setHeader(pht('Revision Contents'))
+      ->addActionLink($view_button);
+
     $tab_view = id(new PHUIObjectBoxView())
-      ->setHeaderText(pht('Revision Contents'))
+      ->setHeader($tab_header)
       ->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
       ->addTabGroup($tab_group);
 

src/applications/differential/query/DifferentialChangesetQuery.php

@@ -41,19 +41,12 @@ final class DifferentialChangesetQuery
     }
   }
 
+  public function newResultObject() {
+    return new DifferentialChangeset();
+  }
+
   protected function loadPage() {
-    $table = new DifferentialChangeset();
-    $conn_r = $table->establishConnection('r');
-
-    $data = queryfx_all(
-      $conn_r,
-      'SELECT * FROM %T %Q %Q %Q',
-      $table->getTableName(),
-      $this->buildWhereClause($conn_r),
-      $this->buildOrderClause($conn_r),
-      $this->buildLimitClause($conn_r));
-
-    return $table->loadAllFromArray($data);
+    return $this->loadStandardPage($this->newResultObject());
   }
 
   protected function willFilterPage(array $changesets) {
@@ -124,26 +117,24 @@ final class DifferentialChangesetQuery
     return $changesets;
   }
 
-  protected function buildWhereClause(AphrontDatabaseConnection $conn_r) {
-    $where = array();
+  protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
+    $where = parent::buildWhereClauseParts($conn);
 
     if ($this->diffs !== null) {
       $where[] = qsprintf(
-        $conn_r,
+        $conn,
         'diffID IN (%Ld)',
         mpull($this->diffs, 'getID'));
     }
 
     if ($this->ids !== null) {
       $where[] = qsprintf(
-        $conn_r,
+        $conn,
         'id IN (%Ld)',
         $this->ids);
     }
 
-    $where[] = $this->buildPagingClause($conn_r);
-
-    return $this->formatWhereClause($where);
+    return $where;
   }
 
   public function getQueryApplicationClass() {

src/applications/differential/query/DifferentialChangesetSearchEngine.php

@@ -0,0 +1,133 @@
+<?php
+
+final class DifferentialChangesetSearchEngine
+  extends PhabricatorApplicationSearchEngine {
+
+  private $diff;
+
+  public function setDiff(DifferentialDiff $diff) {
+    $this->diff = $diff;
+    return $this;
+  }
+
+  public function getDiff() {
+    return $this->diff;
+  }
+
+  public function getResultTypeDescription() {
+    return pht('Differential Changesets');
+  }
+
+  public function getApplicationClassName() {
+    return 'PhabricatorDifferentialApplication';
+  }
+
+  public function newQuery() {
+    $query = id(new DifferentialChangesetQuery());
+
+    if ($this->diff) {
+      $query->withDiffs(array($this->diff));
+    }
+
+    return $query;
+  }
+
+  protected function buildQueryFromParameters(array $map) {
+    $query = $this->newQuery();
+    return $query;
+  }
+
+  protected function buildCustomSearchFields() {
+    return array();
+  }
+
+  protected function getURI($path) {
+    $diff = $this->getDiff();
+    if ($diff) {
+      return '/differential/diff/'.$diff->getID().'/changesets/'.$path;
+    }
+
+    throw new PhutilMethodNotImplementedException();
+  }
+
+  protected function getBuiltinQueryNames() {
+    $names = array();
+    $names['all'] = pht('All Changesets');
+    return $names;
+  }
+
+  public function buildSavedQueryFromBuiltin($query_key) {
+    $query = $this->newSavedQuery();
+    $query->setQueryKey($query_key);
+
+    $viewer = $this->requireViewer();
+
+    switch ($query_key) {
+      case 'all':
+        return $query->setParameter('order', 'oldest');
+    }
+
+    return parent::buildSavedQueryFromBuiltin($query_key);
+  }
+
+  protected function renderResultList(
+    array $changesets,
+    PhabricatorSavedQuery $query,
+    array $handles) {
+
+    assert_instances_of($changesets, 'DifferentialChangeset');
+    $viewer = $this->requireViewer();
+
+    $rows = array();
+    foreach ($changesets as $changeset) {
+      $link = phutil_tag(
+        'a',
+        array(
+          'href' => '/differential/changeset/?ref='.$changeset->getID(),
+        ),
+        $changeset->getDisplayFilename());
+
+      $type = $changeset->getChangeType();
+
+      $title = DifferentialChangeType::getFullNameForChangeType($type);
+
+      $add_lines = $changeset->getAddLines();
+      if (!$add_lines) {
+        $add_lines = null;
+      } else {
+        $add_lines = '+'.$add_lines;
+      }
+
+      $rem_lines = $changeset->getDelLines();
+      if (!$rem_lines) {
+        $rem_lines = null;
+      } else {
+        $rem_lines = '-'.$rem_lines;
+      }
+
+      $rows[] = array(
+        $changeset->newFileTreeIcon(),
+        $title,
+        $link,
+      );
+    }
+
+    $table = id(new AphrontTableView($rows))
+      ->setHeaders(
+        array(
+          null,
+          pht('Change'),
+          pht('Path'),
+        ))
+      ->setColumnClasses(
+        array(
+          null,
+          null,
+          'pri wide',
+        ));
+
+    return id(new PhabricatorApplicationSearchResultView())
+      ->setTable($table);
+  }
+
+}