+ /**
+ * Method that subclasses can override to handle window/screen resize
+ * events.
+ *
+ * @param resize resize event
+ */
+ @Override
+ public void onResize(final TResizeEvent resize) {
+ // Change my width/height, and pull the cursor in as needed.
+ if (resize.getType() == TResizeEvent.Type.WIDGET) {
+ setWidth(resize.getWidth());
+ setHeight(resize.getHeight());
+ // See if the cursor is now outside the window, and if so move
+ // things.
+ if (getCursorX() >= getWidth()) {
+ leftColumn += getCursorX() - (getWidth() - 1);
+ setCursorX(getWidth() - 1);
+ }
+ if (getCursorY() >= getHeight()) {
+ topLine += getCursorY() - (getHeight() - 1);
+ setCursorY(getHeight() - 1);
+ }
+ } else {
+ // Let superclass handle it
+ super.onResize(resize);
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // TEditorWidget ----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Align visible area with document current line.
+ *
+ * @param topLineIsTop if true, make the top visible line the document
+ * current line if it was off-screen. If false, make the bottom visible
+ * line the document current line.
+ */
+ private void alignTopLine(final boolean topLineIsTop) {
+ int line = document.getLineNumber();
+
+ if ((line < topLine) || (line > topLine + getHeight() - 1)) {
+ // Need to move topLine to bring document back into view.
+ if (topLineIsTop) {
+ topLine = line - (getHeight() - 1);
+ if (topLine < 0) {
+ topLine = 0;
+ }
+ assert (topLine >= 0);
+ } else {
+ topLine = line;
+ assert (topLine >= 0);
+ }
+ }
+
+ /*
+ System.err.println("line " + line + " topLine " + topLine);
+ */
+
+ // Document is in view, let's set cursorY
+ assert (line >= topLine);
+ setCursorY(line - topLine);
+ alignCursor();
+ }
+
+ /**
+ * Align document current line with visible area.
+ *
+ * @param topLineIsTop if true, make the top visible line the document
+ * current line if it was off-screen. If false, make the bottom visible
+ * line the document current line.
+ */
+ private void alignDocument(final boolean topLineIsTop) {
+ int line = document.getLineNumber();
+ int cursor = document.getCursor();
+
+ if ((line < topLine) || (line > topLine + getHeight() - 1)) {
+ // Need to move document to ensure it fits view.
+ if (topLineIsTop) {
+ document.setLineNumber(topLine);
+ } else {
+ document.setLineNumber(topLine + (getHeight() - 1));
+ }
+ if (cursor < document.getCurrentLine().getDisplayLength()) {
+ document.setCursor(cursor);
+ }
+ }
+
+ /*
+ System.err.println("getLineNumber() " + document.getLineNumber() +
+ " topLine " + topLine);
+ */
+
+ // Document is in view, let's set cursorY
+ setCursorY(document.getLineNumber() - topLine);
+ alignCursor();
+ }
+
+ /**
+ * Align visible cursor with document cursor.
+ */
+ private void alignCursor() {
+ int width = getWidth();
+
+ int desiredX = document.getCursor() - leftColumn;
+ if (desiredX < 0) {
+ // We need to push the screen to the left.
+ leftColumn = document.getCursor();
+ } else if (desiredX > width - 1) {
+ // We need to push the screen to the right.
+ leftColumn = document.getCursor() - (width - 1);
+ }
+
+ /*
+ System.err.println("document cursor " + document.getCursor() +
+ " leftColumn " + leftColumn);
+ */
+
+
+ setCursorX(document.getCursor() - leftColumn);
+ }
+
+ /**
+ * Get the number of lines in the underlying Document.
+ *
+ * @return the number of lines
+ */
+ public int getLineCount() {
+ return document.getLineCount();
+ }
+
+ /**
+ * Get the current visible top row number. 1-based.
+ *
+ * @return the visible top row number. Row 1 is the first row.
+ */
+ public int getVisibleRowNumber() {
+ return topLine + 1;
+ }
+
+ /**
+ * Set the current visible row number. 1-based.
+ *
+ * @param row the new visible row number. Row 1 is the first row.
+ */
+ public void setVisibleRowNumber(final int row) {
+ assert (row > 0);
+ if ((row > 0) && (row < document.getLineCount())) {
+ topLine = row - 1;
+ alignDocument(true);
+ }
+ }
+
+ /**
+ * Get the current editing row number. 1-based.
+ *
+ * @return the editing row number. Row 1 is the first row.
+ */
+ public int getEditingRowNumber() {
+ return document.getLineNumber() + 1;
+ }
+
+ /**
+ * Set the current editing row number. 1-based.
+ *
+ * @param row the new editing row number. Row 1 is the first row.
+ */
+ public void setEditingRowNumber(final int row) {
+ assert (row > 0);
+ if ((row > 0) && (row < document.getLineCount())) {
+ document.setLineNumber(row - 1);
+ alignTopLine(true);
+ }
+ }
+
+ /**
+ * Set the current visible column number. 1-based.
+ *
+ * @return the visible column number. Column 1 is the first column.
+ */
+ public int getVisibleColumnNumber() {
+ return leftColumn + 1;
+ }
+
+ /**
+ * Set the current visible column number. 1-based.
+ *
+ * @param column the new visible column number. Column 1 is the first
+ * column.
+ */
+ public void setVisibleColumnNumber(final int column) {
+ assert (column > 0);
+ if ((column > 0) && (column < document.getLineLengthMax())) {
+ leftColumn = column - 1;
+ alignDocument(true);
+ }
+ }
+
+ /**
+ * Get the current editing column number. 1-based.
+ *
+ * @return the editing column number. Column 1 is the first column.
+ */
+ public int getEditingColumnNumber() {
+ return document.getCursor() + 1;
+ }
+
+ /**
+ * Set the current editing column number. 1-based.
+ *
+ * @param column the new editing column number. Column 1 is the first
+ * column.
+ */
+ public void setEditingColumnNumber(final int column) {
+ if ((column > 0) && (column < document.getLineLength())) {
+ document.setCursor(column - 1);
+ alignCursor();
+ }
+ }
+
+ /**
+ * Get the maximum possible row number. 1-based.
+ *
+ * @return the maximum row number. Row 1 is the first row.
+ */
+ public int getMaximumRowNumber() {
+ return document.getLineCount() + 1;
+ }
+
+ /**
+ * Get the maximum possible column number. 1-based.
+ *
+ * @return the maximum column number. Column 1 is the first column.
+ */
+ public int getMaximumColumnNumber() {
+ return document.getLineLengthMax() + 1;
+ }
+
+ /**
+ * Get the dirty value.
+ *
+ * @return true if the buffer is dirty
+ */
+ public boolean isDirty() {
+ return document.isDirty();
+ }
+
+ /**
+ * Save contents to file.
+ *
+ * @param filename file to save to
+ * @throws IOException if a java.io operation throws
+ */
+ public void saveToFilename(final String filename) throws IOException {
+ document.saveToFilename(filename);
+ }
+