Added DetailView.

framework/yii/widgets/DetailView.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\widgets;
+
+use Yii;
+use yii\base\Arrayable;
+use yii\base\Formatter;
+use yii\base\InvalidConfigException;
+use yii\base\Model;
+use yii\base\Widget;
+use yii\helpers\ArrayHelper;
+use yii\helpers\Html;
+use yii\helpers\Inflector;
+
+/**
+ * DetailView displays the detail of a single data [[model]].
+ *
+ * DetailView is best used for displaying a model in a regular format (e.g. each model attribute
+ * is displayed as a row in a table.) The model can be either an instance of [[Model]] or
+ * or an associative array.
+ *
+ * DetailView uses the [[attributes]] property to determines which model attributes
+ * should be displayed and how they should be formatted.
+ *
+ * A typical usage of DetailView is as follows:
+ *
+ * ~~~
+ * \yii\widgets\DetailView::widget(array(
+ *     'data' => $model,
+ *     'attributes' => array(
+ *         'title',             // title attribute (in plain text)
+ *         'description:html',  // description attribute in HTML
+ *         array(               // the owner name of the model
+ *             'label' => 'Owner',
+ *             'value' => $model->owner->name,
+ *         ),
+ *     ),
+ * ));
+ * ~~~
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class DetailView extends Widget
+{
+	/**
+	 * @var array|object the data model whose details are to be displayed. This can be either a [[Model]] instance
+	 * or an associative array.
+	 */
+	public $model;
+	/**
+	 * @var array a list of attributes to be displayed in the detail view. Each array element
+	 * represents the specification for displaying one particular attribute.
+	 *
+	 * An attribute can be specified as a string in the format of "Name" or "Name:Type", where "Name" refers to
+	 * the attribute name, and "Type" represents the type of the attribute. The "Type" is passed to the [[Formatter::format()]]
+	 * method to format an attribute value into a displayable text. Please refer to [[Formatter]] for the supported types.
+	 *
+	 * An attribute can also be specified in terms of an array with the following elements:
+	 *
+	 * - name: the attribute name. This is required if either "label" or "value" is not specified.
+	 * - label: the label associated with the attribute. If this is not specified, it will be generated from the attribute name.
+	 * - value: the value to be displayed. If this is not specified, it will be retrieved from [[model]] using the attribute name
+	 *   by calling [[ArrayHelper::getValue()]]. Note that this value will be formatted into a displayable text
+	 *   according to the "type" option.
+	 * - type: the type of the value that determines how the value would be formatted into a displayable text.
+	 *   Please refer to [[Formatter]] for supported types.
+	 * - visible: whether the attribute is visible. If set to `false`, the attribute will be displayed.
+	 */
+	public $attributes;
+	/**
+	 * @var string|\Closure the template used to render a single attribute. If a string, the token `{label}`
+	 * and `{value}` will be replaced with the label and the value of the corresponding attribute.
+	 * If an anonymous function, the signature must be as follows:
+	 *
+	 * ~~~
+	 * function ($attribute, $index, $widget)
+	 * ~~~
+	 *
+	 * where `$attribute` refer to the specification of the attribute being rendered, `$index` is the zero-based
+	 * index of the attribute in the [[attributes]] array, and `$widget` refers to this widget instance.
+	 */
+	public $template = "<tr><th>{label}</th><td>{value}</td></tr>";
+	/**
+	 * @var array the HTML attributes for the container tag of this widget. The "tag" option specifies
+	 * what container tag should be used. It defaults to "table" if not set.
+	 */
+	public $options = array('class' => 'table table-striped');
+	/**
+	 * @var array|Formatter the formatter used to format model attribute values into displayable texts.
+	 * This can be either an instance of [[Formatter]] or an configuration array for creating the [[Formatter]]
+	 * instance. If this property is not set, the "formatter" application component will be used.
+	 */
+	public $formatter;
+
+	/**
+	 * Initializes the detail view.
+	 * This method will initialize required property values.
+	 */
+	public function init()
+	{
+		if ($this->model === null) {
+			throw new InvalidConfigException('Please specify the "data" property.');
+		}
+		if ($this->formatter == null) {
+			$this->formatter = Yii::$app->getFormatter();
+		} elseif (is_array($this->formatter)) {
+			$this->formatter = Yii::createObject($this->formatter);
+		} elseif (!$this->formatter instanceof Formatter) {
+			throw new InvalidConfigException('The "formatter" property must be either a Format object or a configuration array.');
+		}
+		$this->normalizeAttributes();
+	}
+
+	/**
+	 * Renders the detail view.
+	 * This is the main entry of the whole detail view rendering.
+	 */
+	public function run()
+	{
+		$rows = array();
+		$i = 0;
+		foreach ($this->attributes as $attribute) {
+			$rows[] = $this->renderAttribute($attribute, $i++);
+		}
+
+		$tag = ArrayHelper::remove($this->options, 'tag', 'table');
+		echo Html::tag($tag, implode("\n", $rows), $this->options);
+	}
+
+	/**
+	 * Renders a single attribute.
+	 * @param array $attribute the specification of the attribute to be rendered.
+	 * @param integer $index the zero-based index of the attribute in the [[attributes]] array
+	 * @return string the rendering result
+	 */
+	protected function renderAttribute($attribute, $index)
+	{
+		if (is_string($this->template)) {
+			return strtr($this->template, array(
+				'{label}' => $attribute['label'],
+				'{value}' => $this->formatter->format($attribute['value'], $attribute['type']),
+			));
+		} else {
+			return call_user_func($this->template, $attribute, $index, $this);
+		}
+	}
+
+	/**
+	 * Normalizes the attribute specifications.
+	 * @throws InvalidConfigException
+	 */
+	protected function normalizeAttributes()
+	{
+		if ($this->attributes === null) {
+			if ($this->model instanceof Model) {
+				$this->attributes = $this->model->attributes();
+			} elseif (is_object($this->model)) {
+				$this->attributes = $this->model instanceof Arrayable ? $this->model->toArray() : array_keys(get_object_vars($this->model));
+			} elseif (is_array($this->model)) {
+				$this->attributes = array_keys($this->model);
+			} else {
+				throw new InvalidConfigException('The "data" property must be either an array or an object.');
+			}
+			sort($this->attributes);
+		}
+
+		foreach ($this->attributes as $i => $attribute) {
+			if (is_string($attribute)) {
+				if (!preg_match('/^(\w+)(\s*:\s*(\w+))?$/', $attribute, $matches)) {
+					throw new InvalidConfigException('The attribute must be in the format of "Name" or "Name:Type"');
+				}
+				$attribute = array(
+					'name' => $matches[1],
+					'type' => isset($matches[3]) ? $matches[3] : 'text',
+				);
+			}
+
+			if (!is_array($attribute)) {
+				throw new InvalidConfigException('The attribute configuration must be an array.');
+			}
+
+			if (!isset($attribute['type'])) {
+				$attribute['type'] = 'text';
+			}
+			if (isset($attribute['name'])) {
+				$name = $attribute['name'];
+				if (!isset($attribute['label'])) {
+					$attribute['label'] = $this->model instanceof Model ? $this->model->getAttributeLabel($name) : Inflector::camel2words($name, true);
+				}
+				if (!array_key_exists('value', $attribute)) {
+					$attribute['value'] = ArrayHelper::getValue($this->model, $name);
+				}
+			} elseif (!isset($attribute['label']) || !array_key_exists('value', $attribute)) {
+				throw new InvalidConfigException('The attribute configuration requires the "name" element to determine the value and display label.');
+			}
+
+			$this->attributes[$i] = $attribute;
+		}
+	}
+}