com.vaadin.flow.component.html

Class Anchor

java.lang.Object

com.vaadin.flow.component.Component

com.vaadin.flow.component.HtmlComponent

com.vaadin.flow.component.HtmlContainer

com.vaadin.flow.component.html.Anchor

All Implemented Interfaces:

AttachNotifier, BlurNotifier<Anchor>, DetachNotifier, Focusable<Anchor>, FocusNotifier<Anchor>, HasComponents, HasElement, HasEnabled, HasSize, HasStyle, HasText, Serializable

@Tag(value="a")
public class Anchor
extends HtmlContainer
implements Focusable<Anchor>

Component representing an <a> element.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.flow.component.BlurNotifier

BlurNotifier.BlurEvent<C extends Component>

Nested classes/interfaces inherited from interface com.vaadin.flow.component.FocusNotifier

FocusNotifier.FocusEvent<C extends Component>

Constructor Summary

Constructors

Constructor and Description
Anchor() Creates a new empty anchor component.
Anchor(AbstractStreamResource href, String text) Creates an anchor component with the given text content and stream resource.
Anchor(String href, Component... components) Creates an anchor component with the given href and components as children of this component.
Anchor(String href, String text) Creates an anchor component with the given text content and href.
Anchor(String href, String text, AnchorTarget target) Creates an anchor component with the given target, text content and href.

Method Summary

Modifier and Type	Method and Description
String	getHref() Gets the URL that this anchor links to.
Optional<String>	getTarget() Gets the target window, tab or frame name for this anchor.
AnchorTargetValue	getTargetValue() Gets the target window, tab or frame value for this anchor.
void	onEnabledStateChanged(boolean enabled)
void	removeHref() Removes href attribute.
void	setHref(AbstractStreamResource href) Sets the URL that this anchor links to with the URL of the given StreamResource.
void	setHref(String href) Sets the URL that this anchor links to.
void	setTarget(AnchorTargetValue target) Sets the target window, tab or frame for this anchor.
void	setTarget(String target) Sets the target window, tab or frame for this anchor.
void	setUnsafeHref(String href) Sets the URL that this anchor links to without validating its scheme.

Methods inherited from class com.vaadin.flow.component.HtmlComponent

getTitle, setTitle

Methods inherited from class com.vaadin.flow.component.Component

addListener, fireEvent, from, get, getChildren, getElement, getEventBus, getId, getLocale, getParent, getTranslation, getTranslation, getTranslation, getTranslation, getUI, hasListener, isAttached, isTemplateMapped, isVisible, onAttach, onDetach, set, setElement, setId, setVisible

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.flow.component.Focusable

addFocusShortcut, blur, focus, getTabIndex, setTabIndex

Methods inherited from interface com.vaadin.flow.component.BlurNotifier

addBlurListener

Methods inherited from interface com.vaadin.flow.component.FocusNotifier

addFocusListener

Methods inherited from interface com.vaadin.flow.component.HasEnabled

isEnabled, setEnabled

Methods inherited from interface com.vaadin.flow.component.HasElement

getElement

Methods inherited from interface com.vaadin.flow.component.HasComponents

add, add, addComponentAsFirst, addComponentAtIndex, remove, removeAll

Methods inherited from interface com.vaadin.flow.component.HasText

getText, setText

Methods inherited from interface com.vaadin.flow.component.HasSize

getCssSize, getHeight, getHeightUnit, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getWidth, getWidthUnit, setHeight, setHeight, setHeightFull, setMaxHeight, setMaxHeight, setMaxWidth, setMaxWidth, setMinHeight, setMinHeight, setMinWidth, setMinWidth, setSizeFull, setSizeUndefined, setWidth, setWidth, setWidthFull

Methods inherited from interface com.vaadin.flow.component.HasStyle

addClassName, addClassNames, getClassName, getClassNames, getStyle, hasClassName, removeClassName, removeClassNames, setClassName, setClassName

Methods inherited from interface com.vaadin.flow.component.AttachNotifier

addAttachListener

Methods inherited from interface com.vaadin.flow.component.DetachNotifier

addDetachListener

Constructor Detail

Anchor

public Anchor()

Creates a new empty anchor component.

Anchor

public Anchor(String href,
              String text)

Creates an anchor component with the given text content and href.

Parameters:

href - the href to set

text - the text content to set

Throws:

IllegalArgumentException - if href uses a scheme that is not considered safe according to DeploymentConfiguration.getUrlSafeSchemes(); see setUnsafeHref(String) and the configuration property

See Also:

setHref(String), HasText.setText(String)

Anchor

public Anchor(String href,
              String text,
              AnchorTarget target)

Creates an anchor component with the given target, text content and href.

Parameters:

href - the href to set

text - the text content to set

target - the target window, tab or frame

Throws:

IllegalArgumentException - if href uses a scheme that is not considered safe according to DeploymentConfiguration.getUrlSafeSchemes(); see setUnsafeHref(String) and the configuration property

See Also:

setHref(String), HasText.setText(String), setTarget(AnchorTargetValue)

Anchor

public Anchor(AbstractStreamResource href,
              String text)

Creates an anchor component with the given text content and stream resource.

Parameters:

href - the resource value, not null

text - the text content to set

See Also:

setHref(AbstractStreamResource), HasText.setText(String)

Anchor

public Anchor(String href,
              Component... components)

Creates an anchor component with the given href and components as children of this component.

Parameters:

href - the href to set

components - the components to add

Throws:

IllegalArgumentException - if href uses a scheme that is not considered safe according to DeploymentConfiguration.getUrlSafeSchemes(); see setUnsafeHref(String) and the configuration property

See Also:

setHref(AbstractStreamResource), HasComponents.add(Component...)

Method Detail

setHref

public void setHref(String href)

Sets the URL that this anchor links to.

A disabled Anchor removes the attribute from the HTML element, but it is stored (and reused when enabled again) in the server-side component.

Use the method removeHref() to remove the href attribute instead of setting it to an empty string.

Parameters:

href - the href to set

Throws:

IllegalArgumentException - if the URL uses a scheme that is not considered safe according to DeploymentConfiguration.getUrlSafeSchemes(); see setUnsafeHref(String) and the configuration property

See Also:

removeHref(), setHref(AbstractStreamResource)

setUnsafeHref

public void setUnsafeHref(String href)

Sets the URL that this anchor links to without validating its scheme.

Unlike setHref(String), this method does not reject URLs based on the configuration. Use it only for URLs that are fully under your control and known to be safe, such as a hard-coded javascript: or data: URL. Passing untrusted input here can expose the application to cross-site scripting (XSS) attacks.

Parameters:

href - the href to set

See Also:

setHref(String)

removeHref

public void removeHref()

Removes href attribute.

See Also:

setHref(String)

setHref

public void setHref(AbstractStreamResource href)

Sets the URL that this anchor links to with the URL of the given StreamResource.

Parameters:

href - the resource value, not null

getHref

public String getHref()

Gets the URL that this anchor links to.

Returns:

the href value, or "" if no href has been set

See Also:

setHref(String)

onEnabledStateChanged

public void onEnabledStateChanged(boolean enabled)

Overrides:

onEnabledStateChanged in class Component

setTarget

public void setTarget(String target)

Sets the target window, tab or frame for this anchor. The target is either the window.name of a specific target, or one of these special values:

• _self: Open the link in the current context. This is the default behavior.
• _blank: Opens the link in a new unnamed context.
• _parent: Opens the link in the parent context, or the current context if there is no parent context.
• _top: Opens the link in the top most grandparent context, or the current context if there is no parent context.

Parameters:

target - the target value, or "" to remove the target value

getTarget

public Optional<String> getTarget()

Gets the target window, tab or frame name for this anchor.

Returns:

an optional target, or an empty optional if no target has been set

See Also:

setTarget(String)

setTarget

public void setTarget(AnchorTargetValue target)

Sets the target window, tab or frame for this anchor. The target may be the one of these special values:

• AnchorTarget.DEFAULT: Removes the target value. This has the same effect as setting the target to AnchorTarget.SELF.
• AnchorTarget.SELF: Opens the link in the current context.
• AnchorTarget.BLANK: Opens the link in a new unnamed context.
• AnchorTarget.PARENT: Opens the link in the parent context, or the current context if there is no parent context.
• AnchorTarget.TOP: Opens the link in the top most grandparent context, or the current context if there is no parent context.

Parameters:

target - the target value, not null

getTargetValue

public AnchorTargetValue getTargetValue()

Gets the target window, tab or frame value for this anchor.

Returns:

the target window value , or AnchorTarget.DEFAULT if no target has been set

See Also:

setTarget(AnchorTargetValue), getTarget()