org.beryx.textio.web

Class WebTextTerminal

java.lang.Object

org.beryx.textio.AbstractTextTerminal<WebTextTerminal>

org.beryx.textio.web.WebTextTerminal

All Implemented Interfaces:

TextTerminal<WebTextTerminal>, DataApi

public class WebTextTerminal
extends AbstractTextTerminal<WebTextTerminal>
implements DataApi

A TextTerminal that allows accessing the application via a browser. It works only in conjunction with a web server supporting the DataApi (such as SparkDataServer) and a web component that accesses this API (typically via textterm.js).

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_TIMEOUT_DATA_CLEARED
static long	DEFAULT_TIMEOUT_HAS_ACTION
static long	DEFAULT_TIMEOUT_NOT_EMPTY

Fields inherited from class org.beryx.textio.AbstractTextTerminal

DEFAULT_USER_INTERRUPT_KEY, SYSPROP_PROPERTIES_FILE_LOCATION

Constructor Summary

Constructors

Constructor and Description
WebTextTerminal()

Method Summary

Modifier and Type	Method and Description
void	abort() This method is typically called when a text-based input/output session has been aborted by the user or when a severe error occurred.
void	addSetting(java.lang.String key, java.lang.Object value)
void	addSettings(TextTerminalData.KeyValue... keyValues)
WebTextTerminal	createCopy()
void	dispose(java.lang.String resultData) This method is typically called at the end of a text-based input/output session in order to allow the terminal to release its screen resources.
TextTerminalData	getTextTerminalData() This method is called by the web component while polling for data
boolean	moveToLineStart() Moves the cursor to the start of the current line of text in order to allow overwriting the current line.
void	postHandlerCall(java.lang.String handlerId, java.lang.String partialInput) This method is called by the web component in response to a handler call (triggered by typing its associated key combination).
void	postUserInput(java.lang.String newInput) This method is called by the web component to post the user input
void	postUserInput(java.lang.String newInput, boolean userInterrupt, java.lang.String handlerId)
void	postUserInterrupt(java.lang.String partialInput) This method is called by the web component in response to a user interrupt (typically triggered by typing Ctrl+Q).
void	println() Terminates the current line by writing the line separator string.
void	rawPrint(java.lang.String message) Prints the message in its raw form.
java.lang.String	read(boolean masking) Reads a line of text
boolean	registerHandler(java.lang.String keyStroke, java.util.function.Function<WebTextTerminal,ReadHandlerData> handler) Associates a key combination to a handler.
boolean	registerUserInterruptHandler(java.util.function.Consumer<WebTextTerminal> handler, boolean abortRead) Registers a handler that will be called in response to a user interrupt.
boolean	resetLine() Clears the current line of text.
boolean	resetToBookmark(java.lang.String bookmark) Clears the text after the given bookmark.
protected void	setAction(TextTerminalData.Action action)
protected void	setAction(TextTerminalData.Action action, java.lang.String actionData)
boolean	setBookmark(java.lang.String bookmark) Sets a bookmark with the given name at the current position.
void	setOnAbort(java.lang.Runnable onAbort)
void	setOnDispose(java.lang.Runnable onDispose)
void	setTimeoutDataCleared(long timeoutDataCleared)
void	setTimeoutHasAction(long timeoutHasAction)
void	setTimeoutNotEmpty(long timeoutNotEmpty)
void	setUserInterruptKey(int code, boolean ctrl, boolean shift, boolean alt)
void	setUserInterruptKey(java.lang.String keyStroke)

Methods inherited from class org.beryx.textio.AbstractTextTerminal

addDefaultProperty, getDefaultProperties, getProperties, getPropertiesPrefixes, getPropertiesReader, init, initProperties, initProperties, initProperties

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.beryx.textio.TextTerminal

applyWithPropertiesConfigurator, dispose, executeWithPropertiesConfigurator, print, print, printf, printf, println, println, rawPrint

Field Detail

DEFAULT_TIMEOUT_NOT_EMPTY

public static final long DEFAULT_TIMEOUT_NOT_EMPTY

See Also:

Constant Field Values

DEFAULT_TIMEOUT_HAS_ACTION

public static final long DEFAULT_TIMEOUT_HAS_ACTION

See Also:

Constant Field Values

DEFAULT_TIMEOUT_DATA_CLEARED

public static final long DEFAULT_TIMEOUT_DATA_CLEARED

See Also:

Constant Field Values

Constructor Detail

WebTextTerminal

public WebTextTerminal()

Method Detail

setTimeoutNotEmpty

public void setTimeoutNotEmpty(long timeoutNotEmpty)

setTimeoutHasAction

public void setTimeoutHasAction(long timeoutHasAction)

setTimeoutDataCleared

public void setTimeoutDataCleared(long timeoutDataCleared)

createCopy

public WebTextTerminal createCopy()

dispose

public void dispose(java.lang.String resultData)

Description copied from interface: TextTerminal

This method is typically called at the end of a text-based input/output session in order to allow the terminal to release its screen resources. The terminal should be able to rebuild the released resources when a print or read method is subsequently called. The default implementation does nothing.

Specified by:

dispose in interface TextTerminal<WebTextTerminal>

Parameters:

resultData - stringified information about the outcome of the input/output session; may be null,

abort

public void abort()

Description copied from interface: TextTerminal

This method is typically called when a text-based input/output session has been aborted by the user or when a severe error occurred. The default implementation does nothing.

Specified by:

abort in interface TextTerminal<WebTextTerminal>

resetLine

public boolean resetLine()

Description copied from interface: TextTerminal

Clears the current line of text. Since not all terminals support this feature, the default implementation calls TextTerminal.println() and returns false.

Specified by:

resetLine in interface TextTerminal<WebTextTerminal>

Returns:

true, if the terminal supports this feature and the current line has been successfully cleared.

moveToLineStart

public boolean moveToLineStart()

Description copied from interface: TextTerminal

Moves the cursor to the start of the current line of text in order to allow overwriting the current line. Since not all terminals support this feature, the default implementation calls TextTerminal.println() and returns false.

Specified by:

moveToLineStart in interface TextTerminal<WebTextTerminal>

Returns:

true, if the terminal supports this feature and the cursor has been moved to the start of the current line.

setBookmark

public boolean setBookmark(java.lang.String bookmark)

Description copied from interface: TextTerminal

Sets a bookmark with the given name at the current position. The bookmark name can be subsequently used in a call to TextTerminal.resetToBookmark(String) in order to clear the text after this bookmark. If a bookmark with this name already exists, it will be overwritten. Since not all terminals support this feature, the default implementation does nothing and returns false.

Specified by:

setBookmark in interface TextTerminal<WebTextTerminal>

Returns:

true, if the terminal supports bookmarking and the bookmark has been successfully set.

resetToBookmark

public boolean resetToBookmark(java.lang.String bookmark)

Description copied from interface: TextTerminal

Clears the text after the given bookmark. The bookmark name can be subsequently used in a call to TextTerminal.resetToBookmark(String) in order to clear the text after this bookmark. Since not all terminals support this feature, the default implementation calls TextTerminal.println() and returns false.

Specified by:

resetToBookmark in interface TextTerminal<WebTextTerminal>

Returns:

true, if the terminal supports bookmarking, the given bookmark exists and the text after it has been successfully cleared.

setOnDispose

public void setOnDispose(java.lang.Runnable onDispose)

setOnAbort

public void setOnAbort(java.lang.Runnable onAbort)

read

public java.lang.String read(boolean masking)

Description copied from interface: TextTerminal

Reads a line of text

Specified by:

read in interface TextTerminal<WebTextTerminal>

Parameters:

masking - true, if the input should be masked (for example to enter a password)

Returns:

the entered text

setAction

protected void setAction(TextTerminalData.Action action)

setAction

protected void setAction(TextTerminalData.Action action,
                         java.lang.String actionData)

rawPrint

public void rawPrint(java.lang.String message)

Description copied from interface: TextTerminal

Prints the message in its raw form. This method expects a single line of text. The behavior is undefined if the string contains line separators.

Specified by:

rawPrint in interface TextTerminal<WebTextTerminal>

println

public void println()

Description copied from interface: TextTerminal

Terminates the current line by writing the line separator string.

Specified by:

println in interface TextTerminal<WebTextTerminal>

registerUserInterruptHandler

public boolean registerUserInterruptHandler(java.util.function.Consumer<WebTextTerminal> handler,
                                            boolean abortRead)

Description copied from interface: TextTerminal

Registers a handler that will be called in response to a user interrupt. The event that triggers a user interrupt is usually Ctrl+C, but in general it is terminal specific. For example, a Swing based terminal may send a user interrupt when the X close button of its window is hit. Since not all terminals support this feature, the default implementation just returns false.

Specified by:

registerUserInterruptHandler in interface TextTerminal<WebTextTerminal>

Parameters:

handler - the action to be performed in response to a user interrupt.

abortRead - true, if the current read operation should be aborted on user interrupt.

Returns:

true, if the terminal supports this feature and the handler has been registered; false, otherwise.

registerHandler

public boolean registerHandler(java.lang.String keyStroke,
                               java.util.function.Function<WebTextTerminal,ReadHandlerData> handler)

Description copied from interface: TextTerminal

Associates a key combination to a handler. Since not all terminals support this feature, the default implementation just returns false.

Specified by:

registerHandler in interface TextTerminal<WebTextTerminal>

Parameters:

keyStroke - the key combination associated with the handler. It should have the same format as the argument of KeyStroke.getKeyStroke(String).

handler - the action to be performed when the keyStroke is detected during a read operation.

Returns:

true, if the terminal supports this feature and the handler has been associated with the given key combination; false, otherwise.

getTextTerminalData

public TextTerminalData getTextTerminalData()

Description copied from interface: DataApi

This method is called by the web component while polling for data

Specified by:

getTextTerminalData in interface DataApi

postUserInput

public void postUserInput(java.lang.String newInput,
                          boolean userInterrupt,
                          java.lang.String handlerId)

postUserInput

public void postUserInput(java.lang.String newInput)

Description copied from interface: DataApi

This method is called by the web component to post the user input

Specified by:

postUserInput in interface DataApi

postUserInterrupt

public void postUserInterrupt(java.lang.String partialInput)

Description copied from interface: DataApi

This method is called by the web component in response to a user interrupt (typically triggered by typing Ctrl+Q).

Specified by:

postUserInterrupt in interface DataApi

Parameters:

partialInput - the partially entered input when the user interrupt occurred.

postHandlerCall

public void postHandlerCall(java.lang.String handlerId,
                            java.lang.String partialInput)

Description copied from interface: DataApi

This method is called by the web component in response to a handler call (triggered by typing its associated key combination).

Specified by:

postHandlerCall in interface DataApi

Parameters:

handlerId - the id of the handler to be called.

partialInput - the partially entered input when the hander call occurred.

setUserInterruptKey

public void setUserInterruptKey(java.lang.String keyStroke)

addSetting

public void addSetting(java.lang.String key,
                       java.lang.Object value)

addSettings

public void addSettings(TextTerminalData.KeyValue... keyValues)

setUserInterruptKey

public void setUserInterruptKey(int code,
                                boolean ctrl,
                                boolean shift,
                                boolean alt)