Link proxy column headers on workboards to proxied projects

Summary: Ref T10010. Allows you to click "Milestone 99" to jump directly to that project.

Test Plan:
  - Clicked milestone header, went to milestone.
  - Clicked normal column header, nothing happened. Wow!

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10010

Differential Revision: https://secure.phabricator.com/D15204

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -281,6 +281,13 @@ final class PhabricatorProjectBoardViewController
         ->setSubHeader($column->getDisplayType())
         ->addSigil('workpanel');
 
+      $proxy = $column->getProxy();
+      if ($proxy) {
+        $proxy_id = $proxy->getID();
+        $href = $this->getApplicationURI("view/{$proxy_id}/");
+        $panel->setHref($href);
+      }
+
       $header_icon = $column->getHeaderIcon();
       if ($header_icon) {
         $panel->setHeaderIcon($header_icon);

src/view/phui/PHUIHeaderView.php

@@ -22,6 +22,7 @@ final class PHUIHeaderView extends AphrontTagView {
   private $epoch;
   private $actionIcons = array();
   private $badges = array();
+  private $href;
 
   public function setHeader($header) {
     $this->header = $header;
@@ -147,6 +148,15 @@ final class PHUIHeaderView extends AphrontTagView {
     return $this;
   }
 
+  public function setHref($href) {
+    $this->href = $href;
+    return $this;
+  }
+
+  public function getHref() {
+    return $this->href;
+  }
+
   protected function getTagName() {
     return 'div';
   }
@@ -290,12 +300,25 @@ final class PHUIHeaderView extends AphrontTagView {
         ->setIcon($this->headerIcon);
       $left[] = $icon;
     }
+
+    $header_content = $this->header;
+
+    $href = $this->getHref();
+    if ($href !== null) {
+      $header_content = phutil_tag(
+        'a',
+        array(
+          'href' => $href,
+        ),
+        $header_content);
+    }
+
     $left[] = phutil_tag(
       'span',
       array(
         'class' => 'phui-header-header',
       ),
-      $this->header);
+      $header_content);
 
     if ($this->subheader || $this->badges) {
       $badges = null;

src/view/phui/PHUIWorkpanelView.php

@@ -9,6 +9,7 @@ final class PHUIWorkpanelView extends AphrontTagView {
   private $headerActions = array();
   private $headerTag;
   private $headerIcon;
+  private $href;
 
   public function setHeaderIcon($icon) {
     $this->headerIcon = $icon;
@@ -49,6 +50,15 @@ final class PHUIWorkpanelView extends AphrontTagView {
     return $this;
   }
 
+  public function setHref($href) {
+    $this->href = $href;
+    return $this;
+  }
+
+  public function getHref() {
+    return $this->href;
+  }
+
   protected function getTagAttributes() {
     return array(
       'class' => 'phui-workpanel-view',
@@ -85,6 +95,11 @@ final class PHUIWorkpanelView extends AphrontTagView {
       $header->addActionIcon($action);
     }
 
+    $href = $this->getHref();
+    if ($href !== null) {
+      $header->setHref($href);
+    }
+
     $body = phutil_tag(
       'div',
         array(