org.gjt.sp.jedit

## Class BeanShell

- java.lang.Object
- - org.gjt.sp.jedit.BeanShell

-     public class BeanShell
      extends java.lang.Object

  BeanShell is jEdit's extension language.

  When run from jEdit, BeanShell code has access to the following predefined variables:

  - `view` - the currently active `View`.
  - `editPane` - the currently active `EditPane`.
  - `textArea` - the edit pane's `JEditTextArea`.
  - `buffer` - the edit pane's `Buffer`.
  - `wm` - the view's `DockableWindowManager`.
  - `scriptPath` - the path name of the currently executing BeanShell script.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `BeanShell()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static java.lang.Object` | `_eval(View view, NameSpace namespace, java.lang.String command)` Evaluates the specified BeanShell expression.
    `static void` | `_runScript(View view, java.lang.String path, java.io.Reader in, boolean ownNamespace)` Runs a BeanShell script.
    `static void` | `_runScript(View view, java.lang.String path, java.io.Reader in, NameSpace namespace)` Runs a BeanShell script.
    `static BshMethod` | `cacheBlock(java.lang.String id, java.lang.String code, boolean namespace)` Caches a block of code, returning a handle that can be passed to runCachedBlock().
    `static java.lang.Object` | `eval(View view, NameSpace namespace, java.lang.String command)` Evaluates the specified BeanShell expression.
    `static void` | `evalSelection(View view, JEditTextArea textArea)` Evaluates the text selected in the specified text area.
    `static NameSpace` | `getNameSpace()`
    `static boolean` | `isScriptRunning()`
    `static java.lang.Object` | `runCachedBlock(BshMethod method, View view, NameSpace namespace)` Runs a cached block of code in the specified namespace.
    `static void` | `runScript(View view, java.lang.String path, java.io.Reader in, boolean ownNamespace)` Runs a BeanShell script.
    `static void` | `runScript(View view, java.lang.String path, java.io.Reader in, NameSpace namespace)` Runs a BeanShell script.
    `static void` | `showEvaluateDialog(View view)` Prompts for a BeanShell expression to evaluate.
    `static void` | `showEvaluateLinesDialog(View view)` Evaluates the specified script for each selected line.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### BeanShell

          public BeanShell()

  - ### Method Detail

    - #### evalSelection

          public static void evalSelection(View view,
                                           JEditTextArea textArea)

      Evaluates the text selected in the specified text area.
      Parameters:
        `view` - The view
        `textArea` - The text area
      Since:
        jEdit 2.7pre2

    - #### showEvaluateDialog

          public static void showEvaluateDialog(View view)

      Prompts for a BeanShell expression to evaluate.
      Parameters:
        `view` - the View
      Since:
        jEdit 2.7pre2

    - #### showEvaluateLinesDialog

          public static void showEvaluateLinesDialog(View view)

      Evaluates the specified script for each selected line.
      Parameters:
        `view` - The view
      Since:
        jEdit 4.0pre1

    - #### runScript

          public static void runScript(View view,
                                       java.lang.String path,
                                       java.io.Reader in,
                                       boolean ownNamespace)

      Runs a BeanShell script. Errors are shown in a dialog box.

      If the `in` parameter is non-null, the script is read from that stream; otherwise it is read from the file identified by `path`.

      The `scriptPath` BeanShell variable is set to the path name of the script.

      Parameters:
        `view` - The view. Within the script, references to `buffer`, `textArea` and `editPane` are determined with reference to this parameter.
        `path` - The script file's VFS path.
        `in` - The reader to read the script from, or `null`.
        `ownNamespace` - If set to `false`, methods and variables defined in the script will be available to all future uses of BeanShell; if set to `true`, they will be lost as soon as the script finishes executing. jEdit uses a value of `false` when running startup scripts, and a value of `true` when running all other macros.
      Since:
        jEdit 4.0pre7

    - #### runScript

          public static void runScript(View view,
                                       java.lang.String path,
                                       java.io.Reader in,
                                       NameSpace namespace)

      Runs a BeanShell script. Errors are shown in a dialog box.

      If the `in` parameter is non-null, the script is read from that stream; otherwise it is read from the file identified by `path`.

      The `scriptPath` BeanShell variable is set to the path name of the script.

      Parameters:
        `view` - The view. Within the script, references to `buffer`, `textArea` and `editPane` are determined with reference to this parameter.
        `path` - The script file's VFS path.
        `in` - The reader to read the script from, or `null`.
        `namespace` - The namespace to run the script in.
      Since:
        jEdit 4.2pre5

    - #### _runScript

          public static void _runScript(View view,
                                        java.lang.String path,
                                        java.io.Reader in,
                                        boolean ownNamespace)
                                 throws java.lang.Exception

      Runs a BeanShell script. Errors are passed to the caller.

      If the `in` parameter is non-null, the script is read from that stream; otherwise it is read from the file identified by `path`.

      The `scriptPath` BeanShell variable is set to the path name of the script.

      Parameters:
        `view` - The view. Within the script, references to `buffer`, `textArea` and `editPane` are determined with reference to this parameter.
        `path` - The script file's VFS path.
        `in` - The reader to read the script from, or `null`.
        `ownNamespace` - If set to `false`, methods and variables defined in the script will be available to all future uses of BeanShell; if set to `true`, they will be lost as soon as the script finishes executing. jEdit uses a value of `false` when running startup scripts, and a value of `true` when running all other macros.
      Throws:
        `java.lang.Exception` - instances are thrown when various BeanShell errors occur
      Since:
        jEdit 4.0pre7

    - #### _runScript

          public static void _runScript(View view,
                                        java.lang.String path,
                                        java.io.Reader in,
                                        NameSpace namespace)
                                 throws java.lang.Exception

      Runs a BeanShell script. Errors are passed to the caller.

      If the `in` parameter is non-null, the script is read from that stream; otherwise it is read from the file identified by `path`.

      The `scriptPath` BeanShell variable is set to the path name of the script.

      Parameters:
        `view` - The view. Within the script, references to `buffer`, `textArea` and `editPane` are determined with reference to this parameter.
        `path` - The script file's VFS path.
        `in` - The reader to read the script from, or `null`.
        `namespace` - The namespace to run the script in.
      Throws:
        `java.lang.Exception` - instances are thrown when various BeanShell errors occur
      Since:
        jEdit 4.2pre5

    - #### eval

          public static java.lang.Object eval(View view,
                                              NameSpace namespace,
                                              java.lang.String command)

      Evaluates the specified BeanShell expression. Errors are reported in a dialog box.
      Parameters:
        `view` - The view. Within the script, references to `buffer`, `textArea` and `editPane` are determined with reference to this parameter.
        `namespace` - The namespace
        `command` - The expression
      Returns:
        an object
      Since:
        jEdit 4.0pre8

    - #### _eval

          public static java.lang.Object _eval(View view,
                                               NameSpace namespace,
                                               java.lang.String command)
                                        throws java.lang.Exception

      Evaluates the specified BeanShell expression. Unlike `eval()`, this method passes any exceptions to the caller.
      Parameters:
        `view` - The view. Within the script, references to `buffer`, `textArea` and `editPane` are determined with reference to this parameter.
        `namespace` - The namespace
        `command` - The expression
      Returns:
        the object
      Throws:
        `java.lang.Exception` - instances are thrown when various BeanShell errors occur
      Since:
        jEdit 3.2pre7

    - #### cacheBlock

          public static BshMethod cacheBlock(java.lang.String id,
                                             java.lang.String code,
                                             boolean namespace)
                                      throws java.lang.Exception

      Caches a block of code, returning a handle that can be passed to runCachedBlock().
      Parameters:
        `id` - An identifier. If null, a unique identifier is generated
        `code` - The code
        `namespace` - If true, the namespace will be set
      Returns:
        a bsh method
      Throws:
        `java.lang.Exception` - instances are thrown when various BeanShell errors occur
      Since:
        jEdit 4.1pre1

    - #### runCachedBlock

          public static java.lang.Object runCachedBlock(BshMethod method,
                                                        View view,
                                                        NameSpace namespace)
                                                 throws java.lang.Exception

      Runs a cached block of code in the specified namespace. Faster than evaluating the block each time.
      Parameters:
        `method` - The method instance returned by cacheBlock()
        `view` - The view
        `namespace` - The namespace to run the code in
      Returns:
        an object
      Throws:
        `java.lang.Exception` - instances are thrown when various BeanShell errors occur
      Since:
        jEdit 4.1pre1

    - #### isScriptRunning

          public static boolean isScriptRunning()

      Returns:
        if a BeanShell script or macro is currently running.
      Since:
        jEdit 2.7pre2

    - #### getNameSpace

          public static NameSpace getNameSpace()

      Returns:
        the global namespace.
      Since:
        jEdit 3.2pre5