diff core/lib/Drupal/Core/Theme/ThemeManagerInterface.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Theme/ThemeManagerInterface.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,143 @@
+<?php
+
+namespace Drupal\Core\Theme;
+
+/**
+ * Provides a high level access to the active theme and methods to use it.
+ *
+ * Beside the active theme it provides a wrapper around _theme as well as the
+ * alter functionality for themes.
+ */
+interface ThemeManagerInterface {
+
+  /**
+   * Generates themed output.
+   *
+   * See the @link themeable Default theme implementations topic @endlink for
+   * details.
+   *
+   * @param string $hook
+   *   The name of the theme hook to call.
+   * @param array $variables
+   *   An associative array of theme variables.
+   *
+   * @return string|\Drupal\Component\Render\MarkupInterface
+   *   The rendered output, or a Markup object.
+   */
+  public function render($hook, array $variables);
+
+  /**
+   * Returns the active theme object.
+   *
+   * @return \Drupal\Core\Theme\ActiveTheme
+   */
+  public function getActiveTheme();
+
+  /**
+   * Determines whether there is an active theme.
+   *
+   * @return bool
+   */
+  public function hasActiveTheme();
+
+  /**
+   * Resets the current active theme.
+   *
+   * Note: This method should not be used in common cases, just in special cases
+   * like tests.
+   *
+   * @return $this
+   */
+  public function resetActiveTheme();
+
+  /**
+   * Sets the current active theme manually.
+   *
+   * Note: This method should not be used in common cases, just in special cases
+   * like tests.
+   *
+   * @param \Drupal\Core\Theme\ActiveTheme $active_theme
+   *   The new active theme.
+   * @return $this
+   */
+  public function setActiveTheme(ActiveTheme $active_theme);
+
+  /**
+   * Passes alterable variables to specific $theme_TYPE_alter() implementations.
+   *
+   * Executes an alter hook on the current theme. It also invokes alter hooks
+   * for all base themes.
+   *
+   * $theme specifies the theme name of the active theme and all its base
+   * themes.
+   *
+   * This dispatch function hands off the passed-in variables to type-specific
+   * $theme_TYPE_alter() implementations in the active theme. It ensures a
+   * consistent interface for all altering operations.
+   *
+   * A maximum of 2 alterable arguments is supported. In case more arguments
+   * need to be passed and alterable, modules provide additional variables
+   * assigned by reference in the last $context argument:
+   * @code
+   *   $context = array(
+   *     'alterable' => &$alterable,
+   *     'unalterable' => $unalterable,
+   *     'foo' => 'bar',
+   *   );
+   *   $this->alter('mymodule_data', $alterable1, $alterable2, $context);
+   * @endcode
+   *
+   * Note that objects are always passed by reference in PHP5. If it is
+   * absolutely required that no implementation alters a passed object in
+   * $context, then an object needs to be cloned:
+   * @code
+   *   $context = array(
+   *     'unalterable_object' => clone $object,
+   *   );
+   *   $this->alter('mymodule_data', $data, $context);
+   * @endcode
+   *
+   * @param string|array $type
+   *   A string describing the type of the alterable $data. 'form', 'links',
+   *   'node_content', and so on are several examples. Alternatively can be an
+   *   array, in which case $theme_TYPE_alter() is invoked for each value in the
+   *   array. When Form API is using $this->alter() to
+   *   execute both $theme_form_alter() and $theme_form_FORM_ID_alter()
+   *   implementations, it passes array('form', 'form_' . $form_id) for $type.
+   * @param mixed $data
+   *   The variable that will be passed to $theme_TYPE_alter() implementations
+   *   to be altered. The type of this variable depends on the value of the
+   *   $type argument. For example, when altering a 'form', $data will be a
+   *   structured array. When altering a 'profile', $data will be an object.
+   * @param mixed $context1
+   *   (optional) An additional variable that is passed by reference.
+   * @param mixed $context2
+   *   (optional) An additional variable that is passed by reference. If more
+   *   context needs to be provided to implementations, then this should be an
+   *   associative array as described above.
+   *
+   * @see \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  public function alter($type, &$data, &$context1 = NULL, &$context2 = NULL);
+
+  /**
+   * Provides an alter hook for a specific theme.
+   *
+   * Similar to ::alter, it also invokes the alter hooks for the base themes.
+   *
+   * @param \Drupal\Core\Theme\ActiveTheme $theme
+   *   A manually specified theme.
+   * @param string|array $type
+   *   A string describing the type of the alterable $data.
+   * @param mixed $data
+   *   The variable that will be passed to $theme_TYPE_alter() implementations
+   * @param mixed $context1
+   *   (optional) An additional variable that is passed by reference.
+   * @param mixed $context2
+   *   (optional) An additional variable that is passed by reference.
+   *
+   * @see ::alter
+   */
+  public function alterForTheme(ActiveTheme $theme, $type, &$data, &$context1 = NULL, &$context2 = NULL);
+
+}