package jexer;
import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
import jexer.bits.CellAttributes;
import jexer.bits.StringUtils;
/**
* The document being edited.
*/
- private Document document;
+ protected Document document;
/**
- * The default color for the TEditor class.
+ * The default color for the editable text.
*/
private CellAttributes defaultColor = null;
*/
private int selectionLine1;
+ /**
+ * The list of undo/redo states.
+ */
+ private List<SavedState> undoList = new ArrayList<SavedState>();
+
+ /**
+ * The position in undoList for undo/redo.
+ */
+ private int undoListI = 0;
+
+ /**
+ * The maximum size of the undo list.
+ */
+ private int undoLevel = 50;
+
+ /**
+ * The saved state for an undo/redo operation.
+ */
+ private class SavedState {
+ /**
+ * The Document state.
+ */
+ public Document document;
+
+ /**
+ * The topmost line number in the visible area. 0-based.
+ */
+ public int topLine = 0;
+
+ /**
+ * The leftmost column number in the visible area. 0-based.
+ */
+ public int leftColumn = 0;
+
+ }
+
// ------------------------------------------------------------------------
// Constructors -----------------------------------------------------------
// ------------------------------------------------------------------------
@Override
public void onKeypress(final TKeypressEvent keypress) {
if (keypress.getKey().isShift()) {
- // Selection.
- if (!inSelection) {
- inSelection = true;
- selectionColumn0 = document.getCursor();
- selectionLine0 = document.getLineNumber();
- selectionColumn1 = selectionColumn0;
- selectionLine1 = selectionLine0;
+ if (keypress.equals(kbShiftLeft)
+ || keypress.equals(kbShiftRight)
+ || keypress.equals(kbShiftUp)
+ || keypress.equals(kbShiftDown)
+ || keypress.equals(kbShiftPgDn)
+ || keypress.equals(kbShiftPgUp)
+ || keypress.equals(kbShiftHome)
+ || keypress.equals(kbShiftEnd)
+ ) {
+ // Shifted navigation keys enable selection
+ if (!inSelection) {
+ inSelection = true;
+ selectionColumn0 = document.getCursor();
+ selectionLine0 = document.getLineNumber();
+ selectionColumn1 = selectionColumn0;
+ selectionLine1 = selectionLine0;
+ }
}
} else {
if (keypress.equals(kbLeft)
document.end();
alignTopLine(false);
} else if (keypress.equals(kbIns)) {
- document.setOverwrite(!document.getOverwrite());
+ document.setOverwrite(!document.isOverwrite());
} else if (keypress.equals(kbDel)) {
if (inSelection) {
deleteSelection();
+ alignCursor();
} else {
+ saveUndo();
document.del();
+ alignCursor();
}
- alignCursor();
} else if (keypress.equals(kbBackspace)
|| keypress.equals(kbBackspaceDel)
) {
if (inSelection) {
deleteSelection();
+ alignTopLine(false);
} else {
+ saveUndo();
document.backspace();
+ alignTopLine(false);
}
- alignTopLine(false);
} else if (keypress.equals(kbTab)) {
deleteSelection();
- // Add spaces until we hit modulo 8.
- for (int i = document.getCursor(); (i + 1) % 8 != 0; i++) {
- document.addChar(' ');
- }
+ saveUndo();
+ document.tab();
+ alignCursor();
+ } else if (keypress.equals(kbShiftTab)) {
+ deleteSelection();
+ saveUndo();
+ document.backTab();
alignCursor();
} else if (keypress.equals(kbEnter)) {
deleteSelection();
+ saveUndo();
document.enter();
alignTopLine(true);
} else if (!keypress.getKey().isFnKey()
) {
// Plain old keystroke, process it
deleteSelection();
+ saveUndo();
document.addChar(keypress.getKey().getChar());
alignCursor();
} else {
if (text != null) {
for (int i = 0; i < text.length(); ) {
int ch = text.codePointAt(i);
- onKeypress(new TKeypressEvent(false, 0, ch, false, false,
- false));
+ switch (ch) {
+ case '\n':
+ onKeypress(new TKeypressEvent(kbEnter));
+ break;
+ case '\t':
+ onKeypress(new TKeypressEvent(kbTab));
+ break;
+ default:
+ if ((ch >= 0x20) && (ch != 0x7F)) {
+ onKeypress(new TKeypressEvent(false, 0, ch,
+ false, false, false));
+ }
+ break;
+ }
+
i += Character.charCount(ch);
}
}
// TEditorWidget ----------------------------------------------------------
// ------------------------------------------------------------------------
+ /**
+ * Set the undo level.
+ *
+ * @param undoLevel the maximum number of undo operations
+ */
+ public void setUndoLevel(final int undoLevel) {
+ this.undoLevel = undoLevel;
+ }
+
/**
* Align visible area with document current line.
*
document.setNotDirty();
}
+ /**
+ * Get the overwrite value.
+ *
+ * @return true if new text will overwrite old text
+ */
+ public boolean isOverwrite() {
+ return document.isOverwrite();
+ }
+
/**
* Save contents to file.
*
if (!inSelection) {
return;
}
+
+ saveUndo();
+
inSelection = false;
int startCol = selectionColumn0;
for (int i = 0; i < text.length(); ) {
int ch = text.codePointAt(i);
- onKeypress(new TKeypressEvent(false, 0, ch, false, false,
- false));
+ switch (ch) {
+ case '\n':
+ onKeypress(new TKeypressEvent(kbEnter));
+ break;
+ case '\t':
+ onKeypress(new TKeypressEvent(kbTab));
+ break;
+ default:
+ if ((ch >= 0x20) && (ch != 0x7F)) {
+ onKeypress(new TKeypressEvent(false, 0, ch,
+ false, false, false));
+ }
+ break;
+ }
i += Character.charCount(ch);
}
}
return true;
}
+ /**
+ * Save undo state.
+ */
+ private void saveUndo() {
+ SavedState state = new SavedState();
+ state.document = document.dup();
+ state.topLine = topLine;
+ state.leftColumn = leftColumn;
+ if (undoLevel > 0) {
+ while (undoList.size() > undoLevel) {
+ undoList.remove(0);
+ }
+ }
+ undoList.add(state);
+ undoListI = undoList.size() - 1;
+ }
+
+ /**
+ * Undo an edit.
+ */
+ public void undo() {
+ inSelection = false;
+ if ((undoListI >= 0) && (undoListI < undoList.size())) {
+ SavedState state = undoList.get(undoListI);
+ document = state.document.dup();
+ topLine = state.topLine;
+ leftColumn = state.leftColumn;
+ undoListI--;
+ setCursorY(document.getLineNumber() - topLine);
+ alignCursor();
+ }
+ }
+
+ /**
+ * Redo an edit.
+ */
+ public void redo() {
+ inSelection = false;
+ if ((undoListI >= 0) && (undoListI < undoList.size())) {
+ SavedState state = undoList.get(undoListI);
+ document = state.document.dup();
+ topLine = state.topLine;
+ leftColumn = state.leftColumn;
+ undoListI++;
+ setCursorY(document.getLineNumber() - topLine);
+ alignCursor();
+ }
+ }
+
+ /**
+ * Trim trailing whitespace from lines and trailing empty
+ * lines from the document.
+ */
+ public void cleanWhitespace() {
+ document.cleanWhitespace();
+ setCursorY(document.getLineNumber() - topLine);
+ alignCursor();
+ }
+
+ /**
+ * Set keyword highlighting.
+ *
+ * @param enabled if true, enable keyword highlighting
+ */
+ public void setHighlighting(final boolean enabled) {
+ document.setHighlighting(enabled);
+ }
+
}
git://git.nikiroo.be / fanfix.git / blobdiff