1. interface
  2. Drupal
  3. \
  4. Core
  5. \
  6. Theme
  7. \
  8. ThemeManagerInterface

ThemeManagerInterface

interface ThemeManagerInterface (View source)

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.

Methods

string|MarkupInterface
render(string $hook, array $variables)

Generates themed output.

ActiveTheme
getActiveTheme(RouteMatchInterface $route_match = NULL)

Returns the active theme object.

bool
hasActiveTheme()

Determines whether there is an active theme.

$this
resetActiveTheme()

Resets the current active theme.

$this
setActiveTheme(ActiveTheme $active_theme)

Sets the current active theme manually.

alter(string|array $type, mixed $data, mixed $context1 = NULL, mixed $context2 = NULL)

Passes alterable variables to specific $theme_TYPE_alter() implementations.

alterForTheme(ActiveTheme $theme, string|array $type, mixed $data, mixed $context1 = NULL, mixed $context2 = NULL)

Provides an alter hook for a specific theme.

Details

at line 29
string|MarkupInterface render(string $hook, array $variables)

Generates themed output.

See the @link themeable Default theme implementations topic @endlink for details.

Parameters

string $hook

The name of the theme hook to call.
array $variables

An associative array of theme variables.

Return Value

string|MarkupInterface

The rendered output, or a Markup object.

at line 39
ActiveTheme getActiveTheme(RouteMatchInterface $route_match = NULL)

Returns the active theme object.

Parameters

RouteMatchInterface $route_match

The route match.

Return Value

ActiveTheme

at line 46
bool hasActiveTheme()

Determines whether there is an active theme.

Return Value

bool

at line 56
$this resetActiveTheme()

Resets the current active theme.

Note: This method should not be used in common cases, just in special cases like tests.

Return Value

$this

at line 69
$this setActiveTheme(ActiveTheme $active_theme)

Sets the current active theme manually.

Note: This method should not be used in common cases, just in special cases like tests.

Parameters

ActiveTheme $active_theme

The new active theme.

Return Value

$this

at line 127
alter(string|array $type, mixed $data, mixed $context1 = NULL, mixed $context2 = NULL)

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:

Parameters

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_IDalter() implementations, it passes array('form', 'form' . $form_id) for $type.
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.
mixed $context1

(optional) An additional variable that is passed by reference.
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 also

ModuleHandlerInterface

at line 147
alterForTheme(ActiveTheme $theme, string|array $type, mixed $data, mixed $context1 = NULL, mixed $context2 = NULL)

Provides an alter hook for a specific theme.

Similar to ::alter, it also invokes the alter hooks for the base themes.

Parameters

ActiveTheme $theme

A manually specified theme.
string|array $type

A string describing the type of the alterable $data.
mixed $data

The variable that will be passed to $theme_TYPE_alter() implementations
mixed $context1

(optional) An additional variable that is passed by reference.
mixed $context2

(optional) An additional variable that is passed by reference.

See also

::alter