DBFile
class DBFile extends DBComposite implements AssetContainer, Thumbnail (View source)
Represents a file reference stored in a database
Traits
Provides image manipulation functionality.
This trait can be applied to a ViewableData class to add the logic to render attributes in an SS template.
Allows an object to have extensions applied to it.
A class that can be instantiated or replaced via DI
Provides extensions to this object to integrate it with standard config API methods.
Allows an object to declare a set of custom methods
Config options
| extensions | array | An array of extension names and parameters to be applied to this object upon construction. |
from Extensible |
| unextendable_classes | array | Classes that cannot be extended |
from Extensible |
| casting | |||
| default_cast | string | The default object to cast scalar fields to if casting information is not specified, and casting to an object is required. |
from ViewableData |
| casting_cache | array | from ViewableData | |
| escape_type | string | The escape type for this field when inserted into a template - either "xml" or "raw". |
from DBField |
| default_search_filter_class | string | Subclass of SearchFilter} for usage in {@link defaultSearchFilter(). |
from DBField |
| index | string|bool | The type of index to use for this field. Can either be a string (one of the DBIndexable type options) or a boolean. When a boolean is given, false will not index the field, and true will use the default index type. |
from DBField |
| composite_db | |||
| force_resample | bool | Force all images to resample in all cases Off by default, as this can be resource intensive to apply to multiple images simultaneously. |
from ImageManipulation |
| strip_thumbnail_width | int | from ImageManipulation | |
| strip_thumbnail_height | int | from ImageManipulation | |
| cms_thumbnail_width | int | The width of an image thumbnail in the CMS. |
from ImageManipulation |
| cms_thumbnail_height | int | The height of an image thumbnail in the CMS. |
from ImageManipulation |
| asset_preview_width | int | The width of an image preview in the Asset section |
from ImageManipulation |
| asset_preview_height | int | The height of an image preview in the Asset section |
from ImageManipulation |
| supported_images | array | List of image mime types supported by the image manipulations API |
Properties
| protected static | array | $extra_methods | Custom method sources |
from CustomMethods |
| protected | array | $extra_method_registers | Name of methods to invoke by defineMethods for this instance |
from CustomMethods |
| protected static | array | $built_in_methods | Non-custom public methods. |
from CustomMethods |
| protected | Extension[] | $extension_instances | from Extensible | |
| protected | callable[][] | $beforeExtendCallbacks | List of callbacks to call prior to extensions having extend called on them, each grouped by methodName. |
from Extensible |
| protected | callable[][] | $afterExtendCallbacks | List of callbacks to call after extensions having extend called on them, each grouped by methodName. |
from Extensible |
| protected | ViewableData | $failover | A failover object to attempt to get data from if it is not present on this object. |
from ViewableData |
| protected | ViewableData | $customisedObject | from ViewableData | |
| protected | mixed | $value | Raw value of this field |
from DBField |
| protected | string | $tableName | Table this field belongs to |
from DBField |
| protected | string | $name | Name of this field |
from DBField |
| protected | array | $arrayValue | Used for generating DB schema. {DBSchemaManager} |
from DBField |
| protected | array | $options | Optional parameters for this field |
from DBField |
| protected deprecated | $defaultVal | from DBField | ||
| protected | $isChanged | Marker as to whether this record has changed Only used when deference to the parent object isn't possible |
from DBComposite | |
| protected | array|DataObject | $record | Either the parent dataobject link, or a record of saved values for each field |
from DBComposite |
| protected | array | $attributes | List of attributes to render on the frontend |
from AttributesHTML |
| protected | Image_Backend | $imageBackend | from ImageManipulation | |
| protected | bool | $allowGeneration | If image resizes are allowed |
from ImageManipulation |
| protected | array | $allowedCategories | List of allowed file categories. |
|
| string | $Hash | SHA of the file |
||
| string | $Filename | Name of the file, including directory |
||
| string | $Variant | Variant of the file |
Methods
Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located
Adds any methods from Extension instances attached to this object.
Register an callback to invoke that defines extra methods
Return TRUE if a method exists on this object
Determines if a custom method with this name is defined.
Get meta-data details on a named method
Return the names of all the methods available on this object
Get all public built in methods for this class
Find all methods on the given object.
Add all the methods from an object property.
Add all the methods from an object property (which is an Extension) to this object.
Add a wrapper method - a method which points to another method with a different name. For example, Thumbnail(x) can be wrapped to generateThumbnail(x)
Add callback as a method.
Allows user code to hook into Object::extend prior to control being delegated to extensions. Each callback will be reset once called.
Allows user code to hook into Object::extend after control being delegated to extensions. Each callback will be reset once called.
Adds any methods from Extension instances attached to this object.
Add an extension to a specific class.
No description
Get extra config sources for this class
Return TRUE if a class has a specified extension.
Calls a method if available on both this object and all applied Extensions, and then attempts to merge all results into an array
Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed
Get an extension instance attached to this object by name.
Returns TRUE if this object instance has a specific extension applied in $extension_instances. Extension instances are initialized at constructor time, meaning if you use add_extension() afterwards, the added extension will just be added to new instances of the extended class. Use the static method has_extension() to check if a class (not an instance) has a specific extension.
Get all extension instances for this specific object instance.
An implementation of the factory method, allows you to create an instance of a class
Creates a class instance by the "singleton" design pattern.
Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).
Gets the uninherited value for the given config option
Check if a field exists on this object or its failover.
Get the value of a property/field on this object. This will check if a method called get{$property} exists, then check if a field is available using ViewableData::getField(), then fall back on a failover object.
Set a property/field on this object. This will check for the existence of a method called set{$property}, then use the ViewableData::setField() method.
Set a failover object to attempt to get data from if it is not present on this object.
Check if a field exists on this object. This should be overloaded in child classes.
Set value of a single composite field
Merge some arbitrary data in with this object. This method returns a ViewableData_Customised instance with references to both this and the new custom data.
Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field on this object. This helper will be a subclass of DBField.
Render this object into the template, and get the result as a string. You can pass one of the following as the $template parameter:
- a template name (e.g. Page)
- an array of possible template names - the first valid one will be used
- an SSViewer instance
Store a value in the field cache
Get the value of a field on this object, automatically inserting the value into any available casting objects that have been specified.
A simple wrapper around ViewableData::obj() that automatically caches the result so it can be used again without re-running the method.
Checks if a given method/field has a valid value. If the result is an object, this will return the result of the exists method, otherwise will check if the result is not just an empty paragraph tag.
Get the string value of a field on this object that has been suitable escaped to be inserted directly into a template.
Return a single-item iterator so you can iterate over the fields of a single record.
Find appropriate templates for SSViewer to use to render this object
When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need access to itself.
Get part of the current classes ancestry to be used as a CSS class.
Return debug information about this object that can be rendered into a template
Create a DBField object that's not bound to any particular field.
Assign the given value.
Set default value to use at the DB level
Update the optional parameters for this field
Return the desired index type to use. Will return false if the field instance should not be indexed.
Return the transformed value ready to be sent to the database. This value will be escaped automatically by the prepared query processor, so it should not be escaped or quoted at all.
Write all nested fields into a manipulation
Add all columns which are defined through requireField() and $composite_db, or any additional SQL that is required to get to these columns. Will mostly just write to the SQLSelect->select array.
Returns the value to be set in the database to blank this field.
Returns a FormField instance used as a default for form scaffolding.
Returns a FormField instance used as a default for searchform scaffolding.
Returns the index specifications for the field instance, for example:
Whether or not this DBField only accepts scalar values.
Return array in the format of $composite_db.
Bind this field to the dataobject, and set the underlying table to that of the owner
Retrieve the value of an HTML attribute
Get the default attributes when rendering this object.
Allows customization through an 'updateAttributes' hook on the base class.
Custom attributes to process. Falls back to getAttributes().
Set whether image resizes are allowed
Return clone of self which promises to only return existing thumbnails
Determine if a valid non-empty image exists behind this asset, which is a format compatible with image manipulations
Fit image to specified dimensions and fill leftover space with a solid colour (default white). Use in templates with $Pad.
Update the url to point to a resampled version if forcing
Generate a resized copy of this image with the given width & height.
Scale image proportionally to fit within the specified bounds
Proportionally scale down this image if it is wider or taller than the specified dimensions.
Scale image proportionally by width. Use in templates with $ScaleWidth.
Proportionally scale down this image if it is wider than the specified width.
Scale image proportionally by height. Use in templates with $ScaleHeight.
Proportionally scale down this image if it is taller than the specified height.
Crop image on X axis if it exceeds specified width. Retain height.
Crop image on Y axis if it exceeds specified height. Retain width.
Crop this image to the aspect ratio defined by the specified width and height, then scale down the image to those dimensions if it exceeds them.
Resize and crop image to fill specified dimensions.
Default thumbnail generation for Images
Thubnail generation for all file types.
Get URL to thumbnail of the given size.
Convert the file to another format if there's a registered converter that can handle it.
Return the relative URL of an icon for the file type, based on the appCategory() value.
Determine if this image is of the specified size
Determine if this image is of the specified width
Determine if this image is of the specified width
Wrapper for manipulate() that creates a variant file with a different extension than the original file.
Wrapper for manipulate that passes in and stores Image_Backend objects instead of tuples
Generate a new DBFile instance using the given callback if it hasn't been created yet, or return the existing one if it has.
Name a variant based on a format with arbitrary parameters
Validate a width or size is valid and casts it to integer
Assign a local file to the backend.
Assign a stream to the backend
Assign a set of data to the backend
Customise this object with an "original" record for getting other customised fields
Gets the list of extensions (if limited) for this field. Empty list means there is no restriction on allowed types.
Validate that this DBFile accepts this filename as valid
Check filename, and raise a ValidationException if invalid
Hook to validate this record against a validation result
Hook to validate this record against a validation result
Publicly expose the file (and all variants) identified by the given filename and hash {AssetStore::publish}
Protect a file (and all variants) from public access, identified by the given filename and hash.
Ensures that access to the specified protected file is granted for the current user.
Details
mixed
__call(string $method, array $arguments)
Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located
You can add extra methods to a class using Extensions}, {@link Object::createMethod() or Object::addWrapperMethod()
protected
defineMethods()
Adds any methods from Extension instances attached to this object.
All these methods can then be called directly on the instance (transparently mapped through __call()}), or called explicitly through {@link extend().
protected
registerExtraMethodCallback(string $name, callable $callback)
Register an callback to invoke that defines extra methods
bool
hasMethod(string $method)
Return TRUE if a method exists on this object
This should be used rather than PHP's inbuild method_exists() as it takes into account methods added via extensions
protected bool
hasCustomMethod($method)
Determines if a custom method with this name is defined.
protected array
getExtraMethodConfig(string $method)
Get meta-data details on a named method
array
allMethodNames(bool $custom = false)
Return the names of all the methods available on this object
static protected array
findBuiltInMethods(string|object $class = null)
Get all public built in methods for this class
protected array
findMethodsFrom(object $object)
Find all methods on the given object.
protected
addMethodsFrom(string $property, string|int $index = null)
Add all the methods from an object property.
protected
removeMethodsFrom(string $property, string|int $index = null)
Add all the methods from an object property (which is an Extension) to this object.
protected
addWrapperMethod(string $method, string $wrap)
Add a wrapper method - a method which points to another method with a different name. For example, Thumbnail(x) can be wrapped to generateThumbnail(x)
protected
addCallbackMethod(string $method, callable $callback)
Add callback as a method.
protected
beforeExtending(string $method, callable $callback)
Allows user code to hook into Object::extend prior to control being delegated to extensions. Each callback will be reset once called.
protected
afterExtending(string $method, callable $callback)
Allows user code to hook into Object::extend after control being delegated to extensions. Each callback will be reset once called.
protected
defineExtensionMethods()
Adds any methods from Extension instances attached to this object.
All these methods can then be called directly on the instance (transparently mapped through __call()}), or called explicitly through {@link extend().
static bool
add_extension(string $classOrExtension, string $extension = null)
Add an extension to a specific class.
The preferred method for adding extensions is through YAML config, since it avoids autoloading the class, and is easier to override in more specific configurations.
As an alternative, extensions can be added to a specific class directly in the Object::$extensions array. See SiteTree::$extensions for examples. Keep in mind that the extension will only be applied to new instances, not existing ones (including all instances created through singleton()).
static
remove_extension(string $extension)
Remove an extension from a class.
Note: This will not remove extensions from parent classes, and must be called directly on the class assigned the extension.
Keep in mind that this won't revert any datamodel additions of the extension at runtime, unless its used before the schema building kicks in (in your _config.php). Doesn't remove the extension from any Object instances which are already created, but will have an effect on new extensions. Clears any previously created singletons through singleton() to avoid side-effects from stale extension information.
static array
get_extensions(string $class = null, bool $includeArgumentString = false)
No description
static array|null
get_extra_config_sources(string $class = null)
Get extra config sources for this class
static bool
has_extension(string $classOrExtension, string $requiredExtension = null, bool $strict = false)
Return TRUE if a class has a specified extension.
This supports backwards-compatible format (static Object::has_extension($requiredExtension)) and new format ($object->has_extension($class, $requiredExtension))
array
invokeWithExtensions(string $method, mixed ...$arguments)
Calls a method if available on both this object and all applied Extensions, and then attempts to merge all results into an array
array
extend(string $method, mixed ...$arguments)
Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed
Currently returns an array, with an index resulting every time the function is called. Only adds returns if they're not NULL, to avoid bogus results from methods just defined on the parent extension. This is important for permission-checks through extend, as they use min() to determine if any of the returns is FALSE. As min() doesn't do type checking, an included NULL return would fail the permission checks.
The extension methods are defined during __construct()} in {@link defineMethods().
Extension|null
getExtensionInstance(string $extension)
Get an extension instance attached to this object by name.
bool
hasExtension(string $extension)
Returns TRUE if this object instance has a specific extension applied in $extension_instances. Extension instances are initialized at constructor time, meaning if you use add_extension() afterwards, the added extension will just be added to new instances of the extended class. Use the static method has_extension() to check if a class (not an instance) has a specific extension.
Caution: Don't use singleton(
Extension[]
getExtensionInstances()
Get all extension instances for this specific object instance.
See get_extensions() to get all applied extension classes for this class (not the instance).
This method also provides lazy-population of the extension_instances property.
static Injectable
create(mixed ...$args)
An implementation of the factory method, allows you to create an instance of a class
This method will defer class substitution to the Injector API, which can be customised via the Config API to declare substitution classes.
This can be called in one of two ways - either calling via the class directly, or calling on Object and passing the class name as the first parameter. The following are equivalent: $list = DataList::create(SiteTree::class); $list = SiteTree::get();
static Injectable
singleton(string $class = null)
Creates a class instance by the "singleton" design pattern.
It will always return the same instance for this class, which can be used for performance reasons and as a simple way to access instance methods which don't rely on instance data (e.g. the custom SilverStripe static handling).
static Config_ForClass
config()
Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).
mixed
uninherited(string $name)
Gets the uninherited value for the given config option
__construct(string $name = null, array|string $allowed = [])
Create a new image manipulation
bool
__isset(string $property)
Check if a field exists on this object or its failover.
Note that, unlike the core isset() implementation, this will return true if the property is defined and set to null.
mixed
__get(string $property)
Get the value of a property/field on this object. This will check if a method called get{$property} exists, then check if a field is available using ViewableData::getField(), then fall back on a failover object.
__set(string $property, mixed $value)
Set a property/field on this object. This will check for the existence of a method called set{$property}, then use the ViewableData::setField() method.
setFailover(ViewableData $failover)
Set a failover object to attempt to get data from if it is not present on this object.
ViewableData|null
getFailover()
Get the current failover object if set
bool
hasField(string $field)
Check if a field exists on this object. This should be overloaded in child classes.
mixed
getField(string $field)
get value of a single composite field
$this
setField(string $field, mixed $value, bool $markChanged = true)
Set value of a single composite field
mixed
getDynamicData(string $field)
No description
ViewableData
setDynamicData(string $field, mixed $value)
No description
bool
hasDynamicData(string $field)
No description
ViewableData_Customised
customise(array|ViewableData $data)
Merge some arbitrary data in with this object. This method returns a ViewableData_Customised instance with references to both this and the new custom data.
Note that any fields you specify will take precedence over the fields on this object.
bool
exists()
Composite field defaults to exists only if all fields have values
string
__toString()
No description
ViewableData
getCustomisedObj()
No description
setCustomisedObj(ViewableData $object)
No description
string
castingHelper(string $field)
Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field on this object. This helper will be a subclass of DBField.
string
castingClass(string $field)
deprecated
deprecated
Get the class name a field on this object will be casted to.
string
escapeTypeForField(string $field)
deprecated
deprecated
Return the string-format type for the given field.
DBHTMLText
renderWith(string|array|SSViewer $template, array $customFields = null)
Render this object into the template, and get the result as a string. You can pass one of the following as the $template parameter:
- a template name (e.g. Page)
- an array of possible template names - the first valid one will be used
- an SSViewer instance
protected string
objCacheName(string $fieldName, array $arguments)
deprecated
deprecated
Generate the cache name for a field
protected mixed
objCacheGet(string $key)
Get a cached value from the field cache
protected $this
objCacheSet(string $key, mixed $value)
Store a value in the field cache
protected $this
objCacheClear()
Clear object cache
object|DBField
obj(string $fieldName, array $arguments = [], bool $cache = false, string $cacheName = null)
Get the value of a field on this object, automatically inserting the value into any available casting objects that have been specified.
object|DBField
cachedCall(string $fieldName, array $arguments = [], string $identifier = null)
deprecated
deprecated
A simple wrapper around ViewableData::obj() that automatically caches the result so it can be used again without re-running the method.
bool
hasValue(string $field, array $arguments = [], bool $cache = true)
Checks if a given method/field has a valid value. If the result is an object, this will return the result of the exists method, otherwise will check if the result is not just an empty paragraph tag.
string
XML_val(string $field, array $arguments = [], bool $cache = false)
deprecated
deprecated
Get the string value of a field on this object that has been suitable escaped to be inserted directly into a template.
array
getXMLValues(array $fields)
deprecated
deprecated
Get an array of XML-escaped values by field name
Traversable
getIterator()
deprecated
deprecated
Return a single-item iterator so you can iterate over the fields of a single record.
This is useful so you can use a single record inside a <% control %> block in a template - and then use to access individual fields on this object.
array
getViewerTemplates(string $suffix = '')
Find appropriate templates for SSViewer to use to render this object
ViewableData
Me()
When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need access to itself.
string
CSSClasses(string $stopAtClass = ViewableData::class)
Get part of the current classes ancestry to be used as a CSS class.
This method returns an escaped string of CSS classes representing the current classes ancestry until it hits a stop point - e.g. "Page DataObject ViewableData".
ViewableData_Debugger
Debug()
Return debug information about this object that can be rendered into a template
static DBField
create_field(string $spec, mixed $value, string $name = null, mixed ...$args)
Create a DBField object that's not bound to any particular field.
Useful for accessing the classes behaviour for other parts of your code.
$this
setName(string $name)
Set the name of this field.
The name should never be altered, but it if was never given a name in the first place you can set a name.
If you try an alter the name a warning will be thrown.
string
getName()
Returns the name of this field.
mixed
getValue()
Returns the value of this field.
$this
setValue(mixed $value, DataObject|array $record = null, bool $markChanged = true)
Assign the given value.
If $record is assigned to a dataobject, this field becomes a loose wrapper over the records on that object instead.
{\SilverStripe\ORM\FieldType\ViewableData::obj}
mixed
getDefaultValue()
Get default value assigned at the DB level
$this
setDefaultValue(mixed $defaultValue)
Set default value to use at the DB level
$this
setOptions(array $options = [])
Update the optional parameters for this field
array
getOptions()
Get optional parameters for this field
$this
setIndexType(string|bool $type)
Set the desired index type to use
string|bool
getIndexType()
Return the desired index type to use. Will return false if the field instance should not be indexed.
mixed
prepValueForDB(mixed $value)
Return the transformed value ready to be sent to the database. This value will be escaped automatically by the prepared query processor, so it should not be escaped or quoted at all.
writeToManipulation(array $manipulation)
Write all nested fields into a manipulation
addToQuery(SQLSelect $query)
Add all columns which are defined through requireField() and $composite_db, or any additional SQL that is required to get to these columns. Will mostly just write to the SQLSelect->select array.
$this
setTable(string $tableName)
Assign this DBField to a table
string|null
getTable()
Get the table this field belongs to, if assigned
string
forTemplate()
Determine 'default' casting for this field.
string
HTMLATT()
Gets the value appropriate for a HTML attribute string
string
URLATT()
urlencode this string
string
RAWURLATT()
rawurlencode this string
string
ATT()
Gets the value appropriate for a HTML attribute string
mixed
RAW()
Gets the raw value for this field.
Note: Skips processors implemented via forTemplate()
string
JS()
Gets javascript string literal value
string
JSON()
Return JSON encoded value
string
HTML()
Alias for {XML()}
string
XML()
Return a html5 tag of the appropriate for this file (normally img or a)
string
CDATA()
Safely escape for XML string
mixed
nullValue()
Returns the value to be set in the database to blank this field.
Usually it's a choice between null, 0, and ''
saveInto(DataObject $dataObject)
Saves this field to the given data object.
FormField
scaffoldFormField(string $title = null, array $params = null)
Returns a FormField instance used as a default for form scaffolding.
Used by SearchContext}, {@link ModelAdmin}, {@link DataObject::scaffoldFormFields()
FormField
scaffoldSearchField(string $title = null)
Returns a FormField instance used as a default for searchform scaffolding.
Used by SearchContext}, {@link ModelAdmin}, {@link DataObject::scaffoldFormFields().
SearchFilter
defaultSearchFilter(string $name = null)
No description
requireField()
Add the field to the underlying database.
debug()
No description
array
getArrayValue()
No description
$this
setArrayValue(array $value)
No description
string|array
getSchemaValue()
Get formfield schema value
array
getIndexSpecs()
Returns the index specifications for the field instance, for example:
[
'type' => 'unique',
'columns' => ['FieldName']
]
bool
scalarValueOnly()
Whether or not this DBField only accepts scalar values.
Composite DBFields can override this method and return false so they can accept arrays of values.
array
compositeDatabaseFields()
Return array in the format of $composite_db.
Used by DataObject->hasOwnDatabaseField().
isChanged()
Returns true if this composite field has changed.
For fields bound to a DataObject, this will be cleared when the DataObject is written.
bindTo(DataObject $dataObject)
Bind this field to the dataobject, and set the underlying table to that of the owner
DBField|null
dbObject(string $field)
Get a db object for the named field
$this
setAttribute($name, $value)
Set an HTML attribute
mixed|null
getAttribute(string $name)
Retrieve the value of an HTML attribute
abstract protected array
getDefaultAttributes()
Get the default attributes when rendering this object.
Called by getAttributes()
array
getAttributes()
Allows customization through an 'updateAttributes' hook on the base class.
Existing attributes are passed in as the first argument and can be manipulated, but any attributes added through a subclass implementation won't be included.
string
getAttributesHTML(array $attributes = null)
Custom attributes to process. Falls back to getAttributes().
If at least one argument is passed as a string, all arguments act as excludes, by name.
$this
setAllowGeneration(bool $allow)
Set whether image resizes are allowed
bool
getAllowGeneration()
Check if resizes are allowed
DBFile
existingOnly()
Return clone of self which promises to only return existing thumbnails
string
getString()
No description
resource
getStream()
No description
string
getURL(bool $grant = true)
No description
string
getAbsoluteURL()
Get the absolute URL to this resource
array|null
getMetaData()
Get metadata for this file
string
getMimeType()
Get mime type
int
getAbsoluteSize()
Return file size in bytes.
string
getFilename()
Get value of filename
string
getHash()
Get value of hash
string
getVariant()
Get value of variant
bool
getIsImage()
Determine if a valid non-empty image exists behind this asset, which is a format compatible with image manipulations
AssetContainer
Pad(int $width, int $height, string $backgroundColor = 'FFFFFF', int $transparencyPercent = 0)
Fit image to specified dimensions and fill leftover space with a solid colour (default white). Use in templates with $Pad.
AssetContainer
Resampled()
Forces the image to be resampled, if possible
updateURL(string $url)
Update the url to point to a resampled version if forcing
AssetContainer
ResizedImage(int $width, int $height)
Generate a resized copy of this image with the given width & height.
This can be used in templates with $ResizedImage but should be avoided, as it's the only image manipulation function which can skew an image.
AssetContainer
Fit(int $width, int $height)
Scale image proportionally to fit within the specified bounds
AssetContainer
FitMax(int $width, int $height)
Proportionally scale down this image if it is wider or taller than the specified dimensions.
Similar to Fit but without up-sampling. Use in templates with $FitMax.
AssetContainer
ScaleWidth(int $width)
Scale image proportionally by width. Use in templates with $ScaleWidth.
AssetContainer
ScaleMaxWidth(int $width)
Proportionally scale down this image if it is wider than the specified width.
Similar to ScaleWidth but without up-sampling. Use in templates with $ScaleMaxWidth.
AssetContainer
ScaleHeight(int $height)
Scale image proportionally by height. Use in templates with $ScaleHeight.
AssetContainer
ScaleMaxHeight(int $height)
Proportionally scale down this image if it is taller than the specified height.
Similar to ScaleHeight but without up-sampling. Use in templates with $ScaleMaxHeight.
AssetContainer
CropWidth(int $width)
Crop image on X axis if it exceeds specified width. Retain height.
Use in templates with $CropWidth. Example: $Image.ScaleHeight(100).$CropWidth(100)
AssetContainer
CropHeight(int $height)
Crop image on Y axis if it exceeds specified height. Retain width.
Use in templates with $CropHeight. Example: $Image.ScaleWidth(100).CropHeight(100)
AssetContainer
FillMax(int $width, int $height)
Crop this image to the aspect ratio defined by the specified width and height, then scale down the image to those dimensions if it exceeds them.
Similar to Fill but without up-sampling. Use in templates with $FillMax.
AssetContainer
Fill(int $width, int $height)
Resize and crop image to fill specified dimensions.
Use in templates with $Fill
AssetContainer
Quality(int $quality)
Set the quality of the resampled image
DBFile|DBHTMLText
CMSThumbnail()
Default CMS thumbnail
AssetContainer|DBHTMLText
StripThumbnail()
Generates a thumbnail for use in the gridfield view
AssetContainer|DBHTMLText
PreviewThumbnail()
Get preview for this file
AssetContainer
Thumbnail(int $width, int $height)
Default thumbnail generation for Images
AssetContainer|DBHTMLText
ThumbnailIcon(int $width, int $height)
Thubnail generation for all file types.
Resizes images, but returns an icon <img /> tag if this is not a resizable image
DBHTMLText
IconTag()
Get HTML for img containing the icon for this file
string
ThumbnailURL(int $width, int $height)
Get URL to thumbnail of the given size.
May fallback to default icon
AssetContainer|null
Convert(string $toExtension)
Convert the file to another format if there's a registered converter that can handle it.
string
getIcon()
Return the relative URL of an icon for the file type, based on the appCategory() value.
Images are searched for in "framework/images/app_icons/".
Image_Backend
getImageBackend()
Get Image_Backend instance for this image
$this
setImageBackend(Image_Backend $backend)
No description
int
getWidth()
Get the width of this image.
int
getHeight()
Get the height of this image.
int
getOrientation()
Get the orientation of this image.
bool
isSize(int $width, int $height)
Determine if this image is of the specified size
bool
isWidth(int $width)
Determine if this image is of the specified width
bool
isHeight(int $height)
Determine if this image is of the specified width
DBFile|null
manipulateExtension(string $newExtension, callable $callback)
Wrapper for manipulate() that creates a variant file with a different extension than the original file.
DBFile|null
manipulateImage(string $variant, callable $callback)
Wrapper for manipulate that passes in and stores Image_Backend objects instead of tuples
DBFile|null
manipulate(string $variant, callable $callback)
Generate a new DBFile instance using the given callback if it hasn't been created yet, or return the existing one if it has.
string
variantName(string $format, $arg = null)
Name a variant based on a format with arbitrary parameters
array|null
variantParts($variantName)
Reverses variantName().
The "format" part of a variant name is a method name on the owner of this trait. For legacy reasons, there's no delimiter between this part, and the encoded arguments. This means we have to use a whitelist of "known formats", based on methods available on the Image class as the "main" user of this trait. The one exception to this is the variant for swapping file extensions, which is explicitly allowed. This class is commonly decorated with additional manipulation methods through DataExtension.
protected int
castDimension(mixed $value, string $dimension)
Validate a width or size is valid and casts it to integer
bool
IsLazyLoaded()
Determine whether the image should be lazy loaded
AssetContainer
LazyLoad(mixed $lazyLoad)
Set the lazy loading state for this Image
protected AssetStore
getStore()
No description
string
getTag()
Return a html5 tag of the appropriate for this file (normally img or a)
string
getFrontendTemplate()
Determine the template to render as on the frontend
string
getBasename()
Get trailing part of filename
string
getExtension()
Get file extension
string
getTitle()
Alt title for this
array
setFromLocalFile(string $path, string $filename = null, string $hash = null, string $variant = null, array $config = [])
Assign a local file to the backend.
array
setFromStream(resource $stream, string $filename, string $hash = null, string $variant = null, array $config = [])
Assign a stream to the backend
array
setFromString(string $data, string $filename, string $hash = null, string $variant = null, array $config = [])
Assign a set of data to the backend
string
Link()
Return URL for this image. Alias for getURL()
string
AbsoluteLink()
Return absolute URL for this image. Alias for getAbsoluteURL()
string
getSourceURL(bool $grant = true)
Get URL, but without resampling.
Note that this will return the url even if the file does not exist.
string
getVisibility()
Determine visibility of the given file
$this
setOriginal(AssetContainer $original)
Customise this object with an "original" record for getting other customised fields
array
getAllowedCategories()
Get list of allowed file categories
$this
setAllowedCategories(array|string $categories)
Assign allowed categories
protected array
getAllowedExtensions()
Gets the list of extensions (if limited) for this field. Empty list means there is no restriction on allowed types.
protected bool
isValidFilename(string $filename)
Validate that this DBFile accepts this filename as valid
protected
assertFilenameValid(string $filename)
Check filename, and raise a ValidationException if invalid
bool
validate(ValidationResult $result, string $filename = null)
deprecated
deprecated
Hook to validate this record against a validation result
bool
validateFilename(ValidationResult $result, string $filename = null)
Hook to validate this record against a validation result
string|false
getSize()
Returns the size of the file type in an appropriate format.
bool
deleteFile()
Delete a file (and all variants).
publishFile()
Publicly expose the file (and all variants) identified by the given filename and hash {AssetStore::publish}
protectFile()
Protect a file (and all variants) from public access, identified by the given filename and hash.
grantFile()
Ensures that access to the specified protected file is granted for the current user.
If this file is currently in protected mode, the asset store will ensure the returned asset for the duration of the current session / user. This will have no effect if the file is in published mode. This will not grant access to users other than the owner of the current session. Does not require a member to be logged in.
revokeFile()
Revoke access to the given file for the current user.
Note: This will have no effect if the given file is public
bool
canViewFile()
Check if the current user can view the given file.
string
renameFile(string $newName)
Rename to new filename, and point to new file
string
copyFile(string $newName)
Copy to new filename.
This will not automatically point to the new file (as renameFile() does)