@Override
public TerminalSize surroundAreaSize(TerminalSize TerminalSize) {
return new TerminalSize(
TerminalSize.getColumns() == Integer.MAX_VALUE
? Integer.MAX_VALUE
: TerminalSize.getColumns() + 4,
TerminalSize.getRows() == Integer.MAX_VALUE
? Integer.MAX_VALUE
: TerminalSize.getRows() + 2);
}
// WARNING!!! Should only be called in a block synchronized on mutex! See refresh()
private void resizeScreenIfNeeded() {
TerminalSize newSize;
synchronized (resizeQueue) {
if (resizeQueue.isEmpty()) return;
newSize = resizeQueue.getLast();
resizeQueue.clear();
}
int height = newSize.getRows();
int width = newSize.getColumns();
ScreenCharacter[][] newBackBuffer = new ScreenCharacter[height][width];
ScreenCharacter[][] newVisibleScreen = new ScreenCharacter[height][width];
ScreenCharacter newAreaCharacter =
new ScreenCharacter('X', Terminal.Color.GREEN, Terminal.Color.BLACK);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (x < backbuffer[0].length && y < backbuffer.length)
newBackBuffer[y][x] = backbuffer[y][x];
else newBackBuffer[y][x] = new ScreenCharacter(newAreaCharacter);
if (x < visibleScreen[0].length && y < visibleScreen.length)
newVisibleScreen[y][x] = visibleScreen[y][x];
else newVisibleScreen[y][x] = new ScreenCharacter(newAreaCharacter);
}
}
backbuffer = newBackBuffer;
visibleScreen = newVisibleScreen;
wholeScreenInvalid = true;
terminalSize = new TerminalSize(newSize);
}
@Override
public void drawBorder(TextGraphics graphics, TerminalSize actualSize, String title) {
graphics.applyTheme(graphics.getTheme().getDefinition(Theme.Category.Border));
final int width = actualSize.getColumns();
final int height = actualSize.getRows();
// Top
graphics.drawString(0, 0, ACS.ULCORNER + "");
for (int x = 1; x < width - 1; x++) graphics.drawString(x, 0, ACS.HLINE + "");
graphics.drawString(width - 1, 0, ACS.URCORNER + "");
// Each row
for (int i = 1; i < height - 1; i++) {
graphics.drawString(0, i, ACS.VLINE + "");
graphics.drawString(0 + width - 1, i, ACS.VLINE + "");
}
// Bottom
graphics.drawString(0, height - 1, ACS.LLCORNER + "");
for (int x = 1; x < width - 1; x++) graphics.drawString(x, height - 1, ACS.HLINE + "");
graphics.drawString(width - 1, height - 1, ACS.LRCORNER + "");
// Write the title
graphics.applyTheme(graphics.getTheme().getDefinition(Theme.Category.DialogArea));
graphics.setBoldMask(true);
graphics.drawString(2, 0, title);
}
/**
* Moves the current cursor position
*
* @param column 0-indexed column number of the new position
* @param row 0-indexed row number of the new position
*/
public void setCursorPosition(int column, int row) {
synchronized (mutex) {
if (column >= 0
&& column < terminalSize.getColumns()
&& row >= 0
&& row < terminalSize.getRows()) {
this.cursorPosition = new TerminalPosition(column, row);
}
}
}
/**
* Erases all the characters on the screen, effectively giving you a blank area. The default
* background color will be used, if you want to fill the screen with a different color you will
* need to do this manually.
*/
public void clear() {
// ScreenCharacter is immutable, so we can use it for every element
ScreenCharacter background = new ScreenCharacter(' ');
synchronized (mutex) {
for (int y = 0; y < terminalSize.getRows(); y++) {
for (int x = 0; x < terminalSize.getColumns(); x++) {
backbuffer[y][x] = background;
}
}
}
}
@Override
public void drawBorder(TextGraphics graphics, TerminalSize actualSize, String title) {
final int width = actualSize.getColumns();
final int height = actualSize.getRows();
final Theme.Definition upperLeft;
final Theme.Definition lowerRight;
if (raised) {
upperLeft = graphics.getTheme().getDefinition(Theme.Category.RaisedBorder);
lowerRight = graphics.getTheme().getDefinition(Theme.Category.Border);
} else {
upperLeft = graphics.getTheme().getDefinition(Theme.Category.Border);
lowerRight = graphics.getTheme().getDefinition(Theme.Category.RaisedBorder);
}
// Top
graphics.applyTheme(upperLeft);
graphics.drawString(0, 0, ACS.ULCORNER + "");
for (int i = 1; i < width - 1; i++) graphics.drawString(i, 0, ACS.HLINE + "");
graphics.applyTheme(lowerRight);
graphics.drawString(width - 1, 0, ACS.URCORNER + "");
// Each row
for (int i = 1; i < height - 1; i++) {
graphics.applyTheme(upperLeft);
graphics.drawString(0, i, ACS.VLINE + "");
graphics.applyTheme(lowerRight);
graphics.drawString(width - 1, i, ACS.VLINE + "");
}
// Bottom
graphics.applyTheme(upperLeft);
graphics.drawString(0, height - 1, ACS.LLCORNER + "");
graphics.applyTheme(lowerRight);
for (int i = 1; i < width - 1; i++) graphics.drawString(i, height - 1, ACS.HLINE + "");
graphics.drawString(width - 1, height - 1, ACS.LRCORNER + "");
// Write the title
graphics.applyTheme(graphics.getTheme().getDefinition(Theme.Category.DialogArea));
graphics.setBoldMask(true);
graphics.drawString(2, 0, title);
}
/**
* Call this method to make changes done through {@code putCharacter(...)}, {@code putString(...)}
* visible on the terminal. The screen will calculate the changes that are required and send the
* necessary characters and control sequences to make it so.
*/
public void refresh() {
if (!hasBeenActivated) return;
synchronized (mutex) {
// If any resize operations are in the queue, execute them
resizeScreenIfNeeded();
Map<TerminalPosition, ScreenCharacter> updateMap =
new TreeMap<TerminalPosition, ScreenCharacter>(new ScreenPointComparator());
for (int y = 0; y < terminalSize.getRows(); y++) {
for (int x = 0; x < terminalSize.getColumns(); x++) {
ScreenCharacter c = backbuffer[y][x];
if (!c.equals(visibleScreen[y][x]) || wholeScreenInvalid) {
visibleScreen[y][x] =
c; // Remember, ScreenCharacter is immutable, we don't need to worry about it being
// modified
updateMap.put(new TerminalPosition(x, y), c);
}
}
}
Writer terminalWriter = new Writer();
terminalWriter.reset();
TerminalPosition previousPoint = null;
for (TerminalPosition nextUpdate : updateMap.keySet()) {
if (previousPoint == null
|| previousPoint.getRow() != nextUpdate.getRow()
|| previousPoint.getColumn() + 1 != nextUpdate.getColumn()) {
terminalWriter.setCursorPosition(nextUpdate.getColumn(), nextUpdate.getRow());
}
terminalWriter.writeCharacter(updateMap.get(nextUpdate));
previousPoint = nextUpdate;
}
terminalWriter.setCursorPosition(
getCursorPosition().getColumn(), getCursorPosition().getRow());
wholeScreenInvalid = false;
}
terminal.flush();
}
/**
* Creates a new Screen on top of a supplied terminal and will set the size of the screen to a
* supplied value. The screen is initially blank.
*
* @param terminal
* @param terminalSize
*/
public Screen(Terminal terminal, TerminalSize terminalSize) {
this(terminal, terminalSize.getColumns(), terminalSize.getRows());
}