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phorge/src/applications/dashboard/engine/PhabricatorDashboardPanelRenderingEngine.php
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PhabricatorDashboardPanelRenderingEngine.php
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<?php
final class PhabricatorDashboardPanelRenderingEngine extends Phobject {
const HEADER_MODE_NORMAL = 'normal';
const HEADER_MODE_NONE = 'none';
const HEADER_MODE_EDIT = 'edit';
private $panel;
private $viewer;
private $enableAsyncRendering;
private $parentPanelPHIDs;
private $headerMode = self::HEADER_MODE_NORMAL;
private $dashboardID;
public function setDashboardID($id) {
$this->dashboardID = $id;
return $this;
}
public function getDashboardID() {
return $this->dashboardID;
}
public function setHeaderMode($header_mode) {
$this->headerMode = $header_mode;
return $this;
}
public function getHeaderMode() {
return $this->headerMode;
}
/**
* Allow the engine to render the panel via Ajax.
*/
public function setEnableAsyncRendering($enable) {
$this->enableAsyncRendering = $enable;
return $this;
}
public function setParentPanelPHIDs(array $parents) {
$this->parentPanelPHIDs = $parents;
return $this;
}
public function getParentPanelPHIDs() {
return $this->parentPanelPHIDs;
}
public function setViewer(PhabricatorUser $viewer) {
$this->viewer = $viewer;
return $this;
}
public function getViewer() {
return $this->viewer;
}
public function setPanel(PhabricatorDashboardPanel $panel) {
$this->panel = $panel;
return $this;
}
public function getPanel() {
return $this->panel;
}
public function renderPanel() {
$panel = $this->getPanel();
$viewer = $this->getViewer();
if (!$panel) {
return $this->renderErrorPanel(
pht('Missing Panel'),
pht('This panel does not exist.'));
}
$panel_type = $panel->getImplementation();
if (!$panel_type) {
return $this->renderErrorPanel(
$panel->getName(),
pht(
'This panel has type "%s", but that panel type is not known to '.
'Phabricator.',
$panel->getPanelType()));
}
try {
$this->detectRenderingCycle($panel);
if ($this->enableAsyncRendering) {
if ($panel_type->shouldRenderAsync()) {
return $this->renderAsyncPanel();
}
}
return $this->renderNormalPanel($viewer, $panel, $this);
} catch (Exception $ex) {
return $this->renderErrorPanel(
$panel->getName(),
pht(
'%s: %s',
phutil_tag('strong', array(), get_class($ex)),
$ex->getMessage()));
}
}
private function renderNormalPanel() {
$panel = $this->getPanel();
$panel_type = $panel->getImplementation();
$content = $panel_type->renderPanelContent(
$this->getViewer(),
$panel,
$this);
$header = $this->renderPanelHeader();
return $this->renderPanelDiv(
$content,
$header);
}
private function renderAsyncPanel() {
$panel = $this->getPanel();
$panel_id = celerity_generate_unique_node_id();
$dashboard_id = $this->getDashboardID();
Javelin::initBehavior(
'dashboard-async-panel',
array(
'panelID' => $panel_id,
'parentPanelPHIDs' => $this->getParentPanelPHIDs(),
'headerMode' => $this->getHeaderMode(),
'dashboardID' => $dashboard_id,
'uri' => '/dashboard/panel/render/'.$panel->getID().'/',
));
$header = $this->renderPanelHeader();
$content = id(new PHUIPropertyListView())
->addTextContent(pht('Loading...'));
return $this->renderPanelDiv(
$content,
$header,
$panel_id);
}
private function renderErrorPanel($title, $body) {
switch ($this->getHeaderMode()) {
case self::HEADER_MODE_NONE:
$header = null;
break;
case self::HEADER_MODE_EDIT:
$header = id(new PHUIActionHeaderView())
->setHeaderTitle($title)
->setHeaderColor(PHUIActionHeaderView::HEADER_LIGHTBLUE);
$header = $this->addPanelHeaderActions($header);
break;
case self::HEADER_MODE_NORMAL:
default:
$header = id(new PHUIActionHeaderView())
->setHeaderTitle($title)
->setHeaderColor(PHUIActionHeaderView::HEADER_LIGHTBLUE);
break;
}
$icon = id(new PHUIIconView())
->setIconFont('fa-warning red msr');
$content = id(new PHUIBoxView())
->addClass('dashboard-box')
->appendChild($icon)
->appendChild($body);
return $this->renderPanelDiv(
$content,
$header);
}
private function renderPanelDiv(
$content,
$header = null,
$id = null) {
require_celerity_resource('phabricator-dashboard-css');
$panel = $this->getPanel();
if (!$id) {
$id = celerity_generate_unique_node_id();
}
return javelin_tag(
'div',
array(
'id' => $id,
'sigil' => 'dashboard-panel',
'meta' => array(
'objectPHID' => $panel->getPHID(),
),
'class' => 'dashboard-panel',
),
array(
$header,
$content,
));
}
private function renderPanelHeader() {
$panel = $this->getPanel();
switch ($this->getHeaderMode()) {
case self::HEADER_MODE_NONE:
$header = null;
break;
case self::HEADER_MODE_EDIT:
$header = id(new PHUIActionHeaderView())
->setHeaderTitle($panel->getName())
->setHeaderColor(PHUIActionHeaderView::HEADER_LIGHTBLUE);
$header = $this->addPanelHeaderActions($header);
break;
case self::HEADER_MODE_NORMAL:
default:
$header = id(new PHUIActionHeaderView())
->setHeaderTitle($panel->getName())
->setHeaderColor(PHUIActionHeaderView::HEADER_LIGHTBLUE);
$panel_type = $panel->getImplementation();
$header = $panel_type->adjustPanelHeader(
$this->getViewer(),
$panel,
$this,
$header);
break;
}
return $header;
}
private function addPanelHeaderActions(
PHUIActionHeaderView $header) {
$panel = $this->getPanel();
$dashboard_id = $this->getDashboardID();
$edit_uri = id(new PhutilURI(
'/dashboard/panel/edit/'.$panel->getID().'/'));
if ($dashboard_id) {
$edit_uri->setQueryParam('dashboardID', $dashboard_id);
}
$action_edit = id(new PHUIIconView())
->setIconFont('fa-pencil')
->setWorkflow(true)
->setHref((string)$edit_uri);
$header->addAction($action_edit);
if ($dashboard_id) {
$uri = id(new PhutilURI(
'/dashboard/removepanel/'.$dashboard_id.'/'))
->setQueryParam('panelPHID', $panel->getPHID());
$action_remove = id(new PHUIIconView())
->setIconFont('fa-trash-o')
->setHref((string)$uri)
->setWorkflow(true);
$header->addAction($action_remove);
}
return $header;
}
/**
* Detect graph cycles in panels, and deeply nested panels.
*
* This method throws if the current rendering stack is too deep or contains
* a cycle. This can happen if you embed layout panels inside each other,
* build a big stack of panels, or embed a panel in remarkup inside another
* panel. Generally, all of this stuff is ridiculous and we just want to
* shut it down.
*
* @param PhabricatorDashboardPanel Panel being rendered.
* @return void
*/
private function detectRenderingCycle(PhabricatorDashboardPanel $panel) {
if ($this->parentPanelPHIDs === null) {
throw new Exception(
pht(
'You must call setParentPanelPHIDs() before rendering panels.'));
}
$max_depth = 4;
if (count($this->parentPanelPHIDs) >= $max_depth) {
throw new Exception(
pht(
'To render more than %s levels of panels nested inside other '.
'panels, purchase a subscription to Phabricator Gold.',
new PhutilNumber($max_depth)));
}
if (in_array($panel->getPHID(), $this->parentPanelPHIDs)) {
throw new Exception(
pht(
'You awake in a twisting maze of mirrors, all alike. '.
'You are likely to be eaten by a graph cycle. '.
'Should you escape alive, you resolve to be more careful about '.
'putting dashboard panels inside themselves.'));
}
}
}

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