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## mars.venus
Class EditPane

    java.lang.Object
      java.awt.Component
          java.awt.Container
              javax.swing.JComponent
                  javax.swing.JPanel
                      mars.venus.EditPane

All Implemented Interfaces:
  ImageObserver, MenuContainer, Serializable, Observer, Accessible

    public class EditPane

extends JPanel
implements Observer

Represents one file opened for editing. Maintains required internal structures. Before Mars 4.0, there was only one editor pane, a tab, and only one file could be open at a time. With 4.0 came the multifile (pane, tab) editor, and existing duties were split between EditPane and the new EditTabbedPane class.

Author:
  Sanderson and Bumgarner
See Also:
  Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel
`JPanel.AccessibleJPanel`

Nested classes/interfaces inherited from class javax.swing.JComponent
`JComponent.AccessibleJComponent`

Nested classes/interfaces inherited from class java.awt.Container
`Container.AccessibleAWTContainer`

Nested classes/interfaces inherited from class java.awt.Component
`Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy`

Field Summary

Fields inherited from class javax.swing.JComponent
`accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW`

Fields inherited from class java.awt.Component
`BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

Fields inherited from interface java.awt.image.ImageObserver
`ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

Constructor Summary
`EditPane(VenusUI appFrame)` Constructor for the EditPane class.

Method Summary
`int` | `convertLineColumnToStreamPosition(int line, int column)` Given line and column (position in the line) numbers, calculate its byte stream position in text being edited.
`Point` | `convertStreamPositionToLineColumn(int position)`
`void` | `copyText()` copy currently-selected text into clipboard
`void` | `cutText()` cut currently-selected text into clipboard
`void` | `discardAllUndoableEdits()` Get rid of any accumulated undoable edits.
`void` | `displayCaretPosition(int pos)` Update the caret position label on the editor's border to display the current line and column.
`void` | `displayCaretPosition(Point p)` Display cursor coordinates
`int` | `doFindText(String find, boolean caseSensitive)` Finds next occurrence of text in a forward search of a string.
`int` | `doReplace(String find, String replace, boolean caseSensitive)` Finds and replaces next occurrence of text in a string in a forward search.
`int` | `doReplaceAll(String find, String replace, boolean caseSensitive)` Finds and replaces ALL occurrences of text in a string in a forward search.
`String` | `getFilename()` Delegates to corresponding FileStatus method
`int` | `getFileStatus()` Get the editing status for this EditPane's associated document.
`String` | `getLineNumbersList(Document doc)`
`String` | `getPathname()` Delegates to corresponding FileStatus method
`String` | `getSource()` Get source code text
`int` | `getSourceLineCount()` Calculate and return number of lines in source code text.
`UndoManager` | `getUndoManager()` get the manager in charge of Undo and Redo operations
`boolean` | `hasUnsavedEdits()` Delegates to corresponding FileStatus method
`boolean` | `isNew()` Delegates to corresponding FileStatus method
`void` | `pasteText()` paste clipboard contents at cursor position
`void` | `redo()` Redo previous edit
`void` | `selectAllText()` select all text
`void` | `selectLine(int line)` Select the specified editor text line.
`void` | `selectLine(int line, int column)` Select the specified editor text line.
`void` | `setFileStatus(int fileStatus)` Set the editing status for this EditPane's associated document.
`void` | `setPathname(String pathname)` Delegates to corresponding FileStatus method
`void` | `setShowLineNumbersEnabled(boolean enabled)` enable or disable checkbox that controls display of line numbers
`void` | `setSourceCode(String s, boolean editable)` For initalizing the source code when opening an ASM file
`boolean` | `showingLineNumbers()` get editor's line number display status
`void` | `tellEditingComponentToRequestFocusInWindow()` Delegates to text area's requestFocusInWindow method.
`void` | `undo()` Undo previous edit
`void` | `update(Observable fontChanger, Object arg)` Update, if source code is visible, when Font setting changes.
`void` | `updateRedoState()` Update state of Edit menu's Redo menu item.
`void` | `updateStaticFileStatus()` Delegates to corresponding FileStatus method
`void` | `updateUndoState()` Update state of Edit menu's Undo menu item.

Methods inherited from class javax.swing.JPanel
`getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI`

Methods inherited from class javax.swing.JComponent
`addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update`

Methods inherited from class java.awt.Container
`add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree`

Methods inherited from class java.awt.Component
`action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### EditPane

    public EditPane(VenusUI appFrame)

  Constructor for the EditPane class.

Method Detail

### setSourceCode

    public void setSourceCode(String s,
                              boolean editable)

  For initalizing the source code when opening an ASM file

  Parameters:
    `s` - String containing text
    `editable` - set true if code is editable else false

### discardAllUndoableEdits

    public void discardAllUndoableEdits()

  Get rid of any accumulated undoable edits. It is useful to call this method after opening a file into the text area. The act of setting its text content upon reading the file will generate an undoable edit. Normally you don't want a freshly-opened file to appear with its Undo action enabled. But it will unless you call this after setting the text.

### getLineNumbersList

    public String getLineNumbersList(Document doc)

### getSourceLineCount

    public int getSourceLineCount()

  Calculate and return number of lines in source code text. Do this by counting newline characters then adding one if last line does not end with newline character.

### getSource

    public String getSource()

  Get source code text

  Returns:
    Sting containing source code

### setFileStatus

    public void setFileStatus(int fileStatus)

  Set the editing status for this EditPane's associated document. For the argument, use one of the constants from class FileStatus.

  Parameters:
    `FileStatus` - the status constant from class FileStatus

### getFileStatus

    public int getFileStatus()

  Get the editing status for this EditPane's associated document. This will be one of the constants from class FileStatus.

### getFilename

    public String getFilename()

  Delegates to corresponding FileStatus method

### getPathname

    public String getPathname()

  Delegates to corresponding FileStatus method

### setPathname

    public void setPathname(String pathname)

  Delegates to corresponding FileStatus method

### hasUnsavedEdits

    public boolean hasUnsavedEdits()

  Delegates to corresponding FileStatus method

### isNew

    public boolean isNew()

  Delegates to corresponding FileStatus method

### tellEditingComponentToRequestFocusInWindow

    public void tellEditingComponentToRequestFocusInWindow()

  Delegates to text area's requestFocusInWindow method.

### updateStaticFileStatus

    public void updateStaticFileStatus()

  Delegates to corresponding FileStatus method

### getUndoManager

    public UndoManager getUndoManager()

  get the manager in charge of Undo and Redo operations

  Returns:
    the UnDo manager

### copyText

    public void copyText()

  copy currently-selected text into clipboard

### cutText

    public void cutText()

  cut currently-selected text into clipboard

### pasteText

    public void pasteText()

  paste clipboard contents at cursor position

### selectAllText

    public void selectAllText()

  select all text

### undo

    public void undo()

  Undo previous edit

### redo

    public void redo()

  Redo previous edit

### updateUndoState

    public void updateUndoState()

  Update state of Edit menu's Undo menu item.

### updateRedoState

    public void updateRedoState()

  Update state of Edit menu's Redo menu item.

### showingLineNumbers

    public boolean showingLineNumbers()

  get editor's line number display status

  Returns:
    true if editor is current displaying line numbers, false otherwise.

### setShowLineNumbersEnabled

    public void setShowLineNumbersEnabled(boolean enabled)

  enable or disable checkbox that controls display of line numbers

  Parameters:
    `enable` - True to enable box, false to disable.

### displayCaretPosition

    public void displayCaretPosition(int pos)

  Update the caret position label on the editor's border to display the current line and column. The position is given as text stream offset and will be converted into line and column.

  Parameters:
    `pos` - Offset into the text stream of caret.

### displayCaretPosition

    public void displayCaretPosition(Point p)

  Display cursor coordinates

  Parameters:
    `p` - Point object with x-y (column, line number) coordinates of cursor

### convertStreamPositionToLineColumn

    public Point convertStreamPositionToLineColumn(int position)

### convertLineColumnToStreamPosition

    public int convertLineColumnToStreamPosition(int line,
                                                 int column)

  Given line and column (position in the line) numbers, calculate its byte stream position in text being edited.

  Parameters:
    `line` - Line number in file (starts with 1)
    `column` - Position within that line (starts with 1)
  Returns:
    corresponding stream position. Returns -1 if there is no corresponding position.

### selectLine

    public void selectLine(int line)

  Select the specified editor text line. Lines are numbered starting with 1, consistent with line numbers displayed by the editor.

  Parameters:
    `line` - The desired line number of this TextPane's text. Numbering starts at 1, and nothing will happen if the parameter value is less than 1

### selectLine

    public void selectLine(int line,
                           int column)

  Select the specified editor text line. Lines are numbered starting with 1, consistent with line numbers displayed by the editor.

  Parameters:
    `line` - The desired line number of this TextPane's text. Numbering starts at 1, and nothing will happen if the parameter value is less than 1
    `column` - Desired column at which to place the cursor.

### doFindText

    public int doFindText(String find,
                          boolean caseSensitive)

  Finds next occurrence of text in a forward search of a string. Search begins at the current cursor location, and wraps around when the end of the string is reached.

  Parameters:
    `find` - the text to locate in the string
    `caseSensitive` - true if search is to be case-sensitive, false otherwise
  Returns:
    TEXT_FOUND or TEXT_NOT_FOUND, depending on the result.

### doReplace

    public int doReplace(String find,
                         String replace,
                         boolean caseSensitive)

  Finds and replaces next occurrence of text in a string in a forward search. If cursor is initially at end of matching selection, will immediately replace then find and select the next occurrence if any. Otherwise it performs a find operation. The replace can be undone with one undo operation.

  Parameters:
    `find` - the text to locate in the string
    `replace` - the text to replace the find text with - if the find text exists
    `caseSensitive` - true for case sensitive. false to ignore case
  Returns:
    Returns TEXT_FOUND if not initially at end of selected match and matching occurrence is found. Returns TEXT_NOT_FOUND if the text is not matched. Returns TEXT_REPLACED_NOT_FOUND_NEXT if replacement is successful but there are no additional matches. Returns TEXT_REPLACED_FOUND_NEXT if reaplacement is successful and there is at least one additional match.

### doReplaceAll

    public int doReplaceAll(String find,
                            String replace,
                            boolean caseSensitive)

  Finds and replaces ALL occurrences of text in a string in a forward search. All replacements are bundled into one CompoundEdit, so one Undo operation will undo all of them.

  Parameters:
    `find` - the text to locate in the string
    `replace` - the text to replace the find text with - if the find text exists
    `caseSensitive` - true for case sensitive. false to ignore case
  Returns:
    the number of occurrences that were matched and replaced.

### update

    public void update(Observable fontChanger,
                       Object arg)

  Update, if source code is visible, when Font setting changes. This method is specified by the Observer interface.

  Specified by:
    `update` in interface `Observer`

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