import java.io.IOException;
import jexer.bits.CellAttributes;
+import jexer.bits.StringUtils;
+import jexer.event.TCommandEvent;
import jexer.event.TKeypressEvent;
import jexer.event.TMouseEvent;
import jexer.event.TResizeEvent;
import jexer.teditor.Document;
import jexer.teditor.Line;
import jexer.teditor.Word;
+import static jexer.TCommand.*;
import static jexer.TKeypress.*;
/**
* TEditorWidget displays an editable text document. It is unaware of
* scrolling behavior, but can respond to mouse and keyboard events.
*/
-public class TEditorWidget extends TWidget {
+public class TEditorWidget extends TWidget implements EditMenuUser {
// ------------------------------------------------------------------------
// Constants --------------------------------------------------------------
*/
private int leftColumn = 0;
+ /**
+ * If true, the mouse is dragging a selection.
+ */
+ private boolean inSelection = false;
+
+ /**
+ * Selection starting column.
+ */
+ private int selectionColumn0;
+
+ /**
+ * Selection starting line.
+ */
+ private int selectionLine0;
+
+ /**
+ * Selection ending column.
+ */
+ private int selectionColumn1;
+
+ /**
+ * Selection ending line.
+ */
+ private int selectionLine1;
+
// ------------------------------------------------------------------------
// Constructors -----------------------------------------------------------
// ------------------------------------------------------------------------
}
// ------------------------------------------------------------------------
- // TWidget ----------------------------------------------------------------
+ // Event handlers ---------------------------------------------------------
// ------------------------------------------------------------------------
- /**
- * Draw the text box.
- */
- @Override
- public void draw() {
- for (int i = 0; i < getHeight(); i++) {
- // Background line
- getScreen().hLineXY(0, i, getWidth(), ' ', defaultColor);
-
- // Now draw document's line
- if (topLine + i < document.getLineCount()) {
- Line line = document.getLine(topLine + i);
- int x = 0;
- for (Word word: line.getWords()) {
- // For now, we are cheating: draw outside the left region
- // if needed and let screen do the clipping.
- getScreen().putStringXY(x - leftColumn, i, word.getText(),
- word.getColor());
- x += word.getDisplayLength();
- if (x - leftColumn > getWidth()) {
- break;
- }
- }
- }
- }
- }
-
/**
* Handle mouse press events.
*
}
if (mouse.isMouse1()) {
+ // Selection.
+ inSelection = true;
+ selectionColumn0 = leftColumn + mouse.getX();
+ selectionLine0 = topLine + mouse.getY();
+ selectionColumn1 = selectionColumn0;
+ selectionLine1 = selectionLine0;
+
+ // Set the row and column
+ int newLine = topLine + mouse.getY();
+ int newX = leftColumn + mouse.getX();
+ if (newLine > document.getLineCount() - 1) {
+ // Go to the end
+ document.setLineNumber(document.getLineCount() - 1);
+ document.end();
+ if (newLine > document.getLineCount() - 1) {
+ setCursorY(document.getLineCount() - 1 - topLine);
+ } else {
+ setCursorY(mouse.getY());
+ }
+ alignCursor();
+ if (inSelection) {
+ selectionColumn1 = document.getCursor();
+ selectionLine1 = document.getLineNumber();
+ }
+ return;
+ }
+
+ document.setLineNumber(newLine);
+ setCursorY(mouse.getY());
+ if (newX >= document.getCurrentLine().getDisplayLength()) {
+ document.end();
+ alignCursor();
+ } else {
+ document.setCursor(newX);
+ setCursorX(mouse.getX());
+ }
+ if (inSelection) {
+ selectionColumn1 = document.getCursor();
+ selectionLine1 = document.getLineNumber();
+ }
+ return;
+ } else {
+ inSelection = false;
+ }
+
+ // Pass to children
+ super.onMouseDown(mouse);
+ }
+
+ /**
+ * Handle mouse motion events.
+ *
+ * @param mouse mouse motion event
+ */
+ @Override
+ public void onMouseMotion(final TMouseEvent mouse) {
+
+ if (mouse.isMouse1()) {
+ // Selection.
+ if (inSelection) {
+ selectionColumn1 = leftColumn + mouse.getX();
+ selectionLine1 = topLine + mouse.getY();
+ } else {
+ inSelection = true;
+ selectionColumn0 = leftColumn + mouse.getX();
+ selectionLine0 = topLine + mouse.getY();
+ selectionColumn1 = selectionColumn0;
+ selectionLine1 = selectionLine0;
+ }
+
// Set the row and column
int newLine = topLine + mouse.getY();
int newX = leftColumn + mouse.getX();
setCursorY(mouse.getY());
}
alignCursor();
+ if (inSelection) {
+ selectionColumn1 = document.getCursor();
+ selectionLine1 = document.getLineNumber();
+ }
return;
}
document.setCursor(newX);
setCursorX(mouse.getX());
}
+ if (inSelection) {
+ selectionColumn1 = document.getCursor();
+ selectionLine1 = document.getLineNumber();
+ }
return;
}
*/
@Override
public void onKeypress(final TKeypressEvent keypress) {
- if (keypress.equals(kbLeft)) {
+ if (keypress.getKey().isShift()) {
+ // Selection.
+ if (!inSelection) {
+ inSelection = true;
+ selectionColumn0 = document.getCursor();
+ selectionLine0 = document.getLineNumber();
+ selectionColumn1 = selectionColumn0;
+ selectionLine1 = selectionLine0;
+ }
+ } else {
+ if (keypress.equals(kbLeft)
+ || keypress.equals(kbRight)
+ || keypress.equals(kbUp)
+ || keypress.equals(kbDown)
+ || keypress.equals(kbPgDn)
+ || keypress.equals(kbPgUp)
+ || keypress.equals(kbHome)
+ || keypress.equals(kbEnd)
+ ) {
+ // Non-shifted navigation keys disable selection.
+ inSelection = false;
+ }
+ }
+
+ if (keypress.equals(kbLeft)
+ || keypress.equals(kbShiftLeft)
+ ) {
document.left();
alignTopLine(false);
- } else if (keypress.equals(kbRight)) {
+ } else if (keypress.equals(kbRight)
+ || keypress.equals(kbShiftRight)
+ ) {
document.right();
alignTopLine(true);
} else if (keypress.equals(kbAltLeft)
|| keypress.equals(kbCtrlLeft)
+ || keypress.equals(kbAltShiftLeft)
+ || keypress.equals(kbCtrlShiftLeft)
) {
document.backwardsWord();
alignTopLine(false);
} else if (keypress.equals(kbAltRight)
|| keypress.equals(kbCtrlRight)
+ || keypress.equals(kbAltShiftRight)
+ || keypress.equals(kbCtrlShiftRight)
) {
document.forwardsWord();
alignTopLine(true);
- } else if (keypress.equals(kbUp)) {
+ } else if (keypress.equals(kbUp)
+ || keypress.equals(kbShiftUp)
+ ) {
document.up();
alignTopLine(false);
- } else if (keypress.equals(kbDown)) {
+ } else if (keypress.equals(kbDown)
+ || keypress.equals(kbShiftDown)
+ ) {
document.down();
alignTopLine(true);
- } else if (keypress.equals(kbPgUp)) {
+ } else if (keypress.equals(kbPgUp)
+ || keypress.equals(kbShiftPgUp)
+ ) {
document.up(getHeight() - 1);
alignTopLine(false);
- } else if (keypress.equals(kbPgDn)) {
+ } else if (keypress.equals(kbPgDn)
+ || keypress.equals(kbShiftPgDn)
+ ) {
document.down(getHeight() - 1);
alignTopLine(true);
- } else if (keypress.equals(kbHome)) {
+ } else if (keypress.equals(kbHome)
+ || keypress.equals(kbShiftHome)
+ ) {
if (document.home()) {
leftColumn = 0;
if (leftColumn < 0) {
}
setCursorX(0);
}
- } else if (keypress.equals(kbEnd)) {
+ } else if (keypress.equals(kbEnd)
+ || keypress.equals(kbShiftEnd)
+ ) {
if (document.end()) {
alignCursor();
}
- } else if (keypress.equals(kbCtrlHome)) {
+ } else if (keypress.equals(kbCtrlHome)
+ || keypress.equals(kbCtrlShiftHome)
+ ) {
document.setLineNumber(0);
document.home();
topLine = 0;
leftColumn = 0;
setCursorX(0);
setCursorY(0);
- } else if (keypress.equals(kbCtrlEnd)) {
+ } else if (keypress.equals(kbCtrlEnd)
+ || keypress.equals(kbCtrlShiftEnd)
+ ) {
document.setLineNumber(document.getLineCount() - 1);
document.end();
alignTopLine(false);
} else if (keypress.equals(kbIns)) {
document.setOverwrite(!document.getOverwrite());
} else if (keypress.equals(kbDel)) {
- document.del();
+ if (inSelection) {
+ deleteSelection();
+ } else {
+ document.del();
+ }
alignCursor();
} else if (keypress.equals(kbBackspace)
|| keypress.equals(kbBackspaceDel)
) {
- document.backspace();
+ if (inSelection) {
+ deleteSelection();
+ } else {
+ document.backspace();
+ }
alignTopLine(false);
} else if (keypress.equals(kbTab)) {
- // TODO: tab character. For now just add spaces until we hit
- // modulo 8.
+ deleteSelection();
+ // Add spaces until we hit modulo 8.
for (int i = document.getCursor(); (i + 1) % 8 != 0; i++) {
document.addChar(' ');
}
alignCursor();
} else if (keypress.equals(kbEnter)) {
+ deleteSelection();
document.enter();
alignTopLine(true);
} else if (!keypress.getKey().isFnKey()
&& !keypress.getKey().isCtrl()
) {
// Plain old keystroke, process it
+ deleteSelection();
document.addChar(keypress.getKey().getChar());
alignCursor();
} else {
// Pass other keys (tab etc.) on to TWidget
super.onKeypress(keypress);
}
+
+ if (inSelection) {
+ selectionColumn1 = document.getCursor();
+ selectionLine1 = document.getLineNumber();
+ }
}
/**
}
}
+ /**
+ * Handle posted command events.
+ *
+ * @param command command event
+ */
+ @Override
+ public void onCommand(final TCommandEvent command) {
+ if (command.equals(cmCut)) {
+ // Copy text to clipboard, and then remove it.
+ copySelection();
+ deleteSelection();
+ return;
+ }
+
+ if (command.equals(cmCopy)) {
+ // Copy text to clipboard.
+ copySelection();
+ return;
+ }
+
+ if (command.equals(cmPaste)) {
+ // Delete selected text, then paste text from clipboard.
+ deleteSelection();
+
+ String text = getClipboard().pasteText();
+ if (text != null) {
+ for (int i = 0; i < text.length(); ) {
+ int ch = text.codePointAt(i);
+ onKeypress(new TKeypressEvent(false, 0, ch, false, false,
+ false));
+ i += Character.charCount(ch);
+ }
+ }
+ return;
+ }
+
+ if (command.equals(cmClear)) {
+ // Remove text.
+ deleteSelection();
+ return;
+ }
+
+ }
+
+ // ------------------------------------------------------------------------
+ // TWidget ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Draw the text box.
+ */
+ @Override
+ public void draw() {
+ CellAttributes selectedColor = getTheme().getColor("teditor.selected");
+
+ int startCol = selectionColumn0;
+ int startRow = selectionLine0;
+ int endCol = selectionColumn1;
+ int endRow = selectionLine1;
+
+ if (((selectionColumn1 < selectionColumn0)
+ && (selectionLine1 <= selectionLine0))
+ || ((selectionColumn1 <= selectionColumn0)
+ && (selectionLine1 < selectionLine0))
+ ) {
+ // The user selected from bottom-right to top-left. Reverse the
+ // coordinates for the inverted section.
+ startCol = selectionColumn1;
+ startRow = selectionLine1;
+ endCol = selectionColumn0;
+ endRow = selectionLine0;
+ }
+
+ for (int i = 0; i < getHeight(); i++) {
+ // Background line
+ getScreen().hLineXY(0, i, getWidth(), ' ', defaultColor);
+
+ // Now draw document's line
+ if (topLine + i < document.getLineCount()) {
+ Line line = document.getLine(topLine + i);
+ int x = 0;
+ for (Word word: line.getWords()) {
+ // For now, we are cheating: draw outside the left region
+ // if needed and let screen do the clipping.
+ getScreen().putStringXY(x - leftColumn, i, word.getText(),
+ word.getColor());
+ x += word.getDisplayLength();
+ if (x - leftColumn > getWidth()) {
+ break;
+ }
+ }
+
+ // Highlight selected region
+ if (inSelection) {
+ if (startRow == endRow) {
+ if (topLine + i == startRow) {
+ for (x = startCol; x <= endCol; x++) {
+ putAttrXY(x - leftColumn, i, selectedColor);
+ }
+ }
+ } else {
+ if (topLine + i == startRow) {
+ for (x = startCol; x < line.getDisplayLength(); x++) {
+ putAttrXY(x - leftColumn, i, selectedColor);
+ }
+ } else if (topLine + i == endRow) {
+ for (x = 0; x <= endCol; x++) {
+ putAttrXY(x - leftColumn, i, selectedColor);
+ }
+ } else if ((topLine + i >= startRow)
+ && (topLine + i <= endRow)
+ ) {
+ for (x = 0; x < getWidth(); x++) {
+ putAttrXY(x, i, selectedColor);
+ }
+ }
+ }
+ }
+
+ }
+ }
+ }
+
// ------------------------------------------------------------------------
// TEditorWidget ----------------------------------------------------------
// ------------------------------------------------------------------------
document.saveToFilename(filename);
}
+ /**
+ * Delete text within the selection bounds.
+ */
+ private void deleteSelection() {
+ if (inSelection == false) {
+ return;
+ }
+ inSelection = false;
+
+ int startCol = selectionColumn0;
+ int startRow = selectionLine0;
+ int endCol = selectionColumn1;
+ int endRow = selectionLine1;
+
+ if (((selectionColumn1 < selectionColumn0)
+ && (selectionLine1 <= selectionLine0))
+ || ((selectionColumn1 <= selectionColumn0)
+ && (selectionLine1 < selectionLine0))
+ ) {
+ // The user selected from bottom-right to top-left. Reverse the
+ // coordinates for the inverted section.
+ startCol = selectionColumn1;
+ startRow = selectionLine1;
+ endCol = selectionColumn0;
+ endRow = selectionLine0;
+ }
+
+ // Place the cursor on the selection end, and "press backspace" until
+ // the cursor matches the selection start.
+ document.setLineNumber(endRow);
+ document.setCursor(endCol + 1);
+ while (!((document.getLineNumber() == startRow)
+ && (document.getCursor() == startCol))
+ ) {
+ document.backspace();
+ }
+ alignTopLine(true);
+ }
+
+ /**
+ * Copy text within the selection bounds to clipboard.
+ */
+ private void copySelection() {
+ if (inSelection == false) {
+ return;
+ }
+
+ int startCol = selectionColumn0;
+ int startRow = selectionLine0;
+ int endCol = selectionColumn1;
+ int endRow = selectionLine1;
+
+ if (((selectionColumn1 < selectionColumn0)
+ && (selectionLine1 <= selectionLine0))
+ || ((selectionColumn1 <= selectionColumn0)
+ && (selectionLine1 < selectionLine0))
+ ) {
+ // The user selected from bottom-right to top-left. Reverse the
+ // coordinates for the inverted section.
+ startCol = selectionColumn1;
+ startRow = selectionLine1;
+ endCol = selectionColumn0;
+ endRow = selectionLine0;
+ }
+
+ StringBuilder sb = new StringBuilder();
+
+ if (endRow > startRow) {
+ // First line
+ String line = document.getLine(startRow).getRawString();
+ int x = 0;
+ for (int i = 0; i < line.length(); ) {
+ int ch = line.codePointAt(i);
+
+ if (x >= startCol) {
+ sb.append(Character.toChars(ch));
+ }
+ x += StringUtils.width(ch);
+ i += Character.charCount(ch);
+ }
+ sb.append("\n");
+
+ // Middle lines
+ for (int y = startRow + 1; y < endRow; y++) {
+ sb.append(document.getLine(y).getRawString());
+ sb.append("\n");
+ }
+
+ // Final line
+ line = document.getLine(endRow).getRawString();
+ x = 0;
+ for (int i = 0; i < line.length(); ) {
+ int ch = line.codePointAt(i);
+
+ if (x > endCol) {
+ break;
+ }
+
+ sb.append(Character.toChars(ch));
+ x += StringUtils.width(ch);
+ i += Character.charCount(ch);
+ }
+ } else {
+ assert (startRow == endRow);
+
+ // Only one line
+ String line = document.getLine(startRow).getRawString();
+ int x = 0;
+ for (int i = 0; i < line.length(); ) {
+ int ch = line.codePointAt(i);
+
+ if ((x >= startCol) && (x <= endCol)) {
+ sb.append(Character.toChars(ch));
+ }
+
+ x += StringUtils.width(ch);
+ i += Character.charCount(ch);
+ }
+ }
+
+ getClipboard().copyText(sb.toString());
+ }
+
+ // ------------------------------------------------------------------------
+ // EditMenuUser -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Check if the cut menu item should be enabled.
+ *
+ * @return true if the cut menu item should be enabled
+ */
+ public boolean isEditMenuCut() {
+ return true;
+ }
+
+ /**
+ * Check if the copy menu item should be enabled.
+ *
+ * @return true if the copy menu item should be enabled
+ */
+ public boolean isEditMenuCopy() {
+ return true;
+ }
+
+ /**
+ * Check if the paste menu item should be enabled.
+ *
+ * @return true if the paste menu item should be enabled
+ */
+ public boolean isEditMenuPaste() {
+ return true;
+ }
+
+ /**
+ * Check if the clear menu item should be enabled.
+ *
+ * @return true if the clear menu item should be enabled
+ */
+ public boolean isEditMenuClear() {
+ return true;
+ }
+
}
git://git.nikiroo.be / fanfix.git / blobdiff