/** Deletes the selected text. */
final void delete() {
if (undo == null) return;
text.pos(text.cursor());
undo.cursor(text.cursor());
text.delete();
undo.store(text.text(), text.cursor());
text.setCaret();
}
/**
* Pastes the specified string.
*
* @param txt string to be pasted
* @return success flag
*/
final boolean paste(final String txt) {
if (txt == null || undo == null) return false;
text.pos(text.cursor());
undo.cursor(text.cursor());
if (text.marked()) text.delete();
text.add(txt);
undo.store(text.text(), text.cursor());
return true;
}
/**
* Returns the cursor coordinates.
*
* @return line/column
*/
int[] pos() {
final int hh = h;
h = Integer.MAX_VALUE;
final Graphics g = getGraphics();
int col = 1;
int line = 1;
init(g, 0);
boolean more = true;
while (more(g)) {
final int p = text.pos();
while (text.more()) {
more = text.pos() < text.cursor();
if (!more) break;
text.next();
col++;
}
if (!more) break;
text.pos(p);
if (next()) {
line++;
col = 1;
}
}
h = hh;
return new int[] {line, col};
}
@Override
public void keyTyped(final KeyEvent e) {
if (undo == null || control(e) || DELNEXT.is(e) || DELPREV.is(e) || ESCAPE.is(e)) return;
text.pos(text.cursor());
// string to be added
String ch = String.valueOf(e.getKeyChar());
// remember if marked text is to be deleted
boolean del = true;
final byte[] txt = text.text();
if (TAB.is(e)) {
if (text.marked()) {
// check if lines are to be indented
final int s = Math.min(text.pos(), text.start());
final int l = Math.max(text.pos(), text.start()) - 1;
for (int p = s; p <= l && p < txt.length; p++) del &= txt[p] != '\n';
if (!del) {
text.indent(s, l, e.isShiftDown());
ch = null;
}
} else {
boolean c = true;
for (int p = text.pos() - 1; p >= 0 && c; p--) {
final byte b = txt[p];
c = ws(b);
if (b == '\n') break;
}
if (c) ch = " ";
}
}
// delete marked text
if (text.marked() && del) text.delete();
if (ENTER.is(e)) {
// adopt indentation from previous line
final StringBuilder sb = new StringBuilder(1).append(e.getKeyChar());
int s = 0;
for (int p = text.pos() - 1; p >= 0; p--) {
final byte b = txt[p];
if (b == '\n') break;
if (b == '\t') {
s += 2;
} else if (b == ' ') {
s++;
} else {
s = 0;
}
}
for (int p = 0; p < s; p++) sb.append(' ');
ch = sb.toString();
}
if (ch != null) text.add(ch);
text.setCaret();
rend.calc();
showCursor(2);
e.consume();
}
/**
* Finds the current keyword and returns the text position.
*
* @param forward backward browsing
* @param same string is the same as last time
* @return new position
*/
int find(final boolean forward, final boolean same) {
if (keyword.isEmpty()) return 0;
while (true) {
final int hh = h;
int lp = 0;
int ly = 0;
int cp = text.cursor();
h = Integer.MAX_VALUE;
final Graphics g = getGraphics();
for (init(g, 0); more(g); next()) {
if (!found()) continue;
final int np = text.pos();
final int ny = y - fontH;
if (np >= cp && (np > cp || !same || !forward)) {
if (forward || lp != 0) {
h = hh;
text.setCaret(forward ? np : lp);
return forward ? ny : ly;
}
cp = Integer.MAX_VALUE;
}
lp = np;
ly = ny;
}
h = hh;
if (cp == 0 || cp == Integer.MAX_VALUE) {
text.setCaret(lp);
return ly;
}
text.setCaret(0);
}
}
/**
* Writes the current string to the graphics reference.
*
* @param g graphics reference
*/
private void write(final Graphics g) {
if (high) {
high = false;
} else {
color = isEnabled() ? syntax.getColor(text) : Color.gray;
}
final int ch = text.curr();
if (y > 0 && y < h) {
if (ch == TokenBuilder.MARK) {
color = GUIConstants.GREEN;
high = true;
}
// mark error
if (text.erroneous()) {
g.setColor(GUIConstants.LRED);
g.fillRect(x, y - fontH + 4, wordW, fontH);
}
// mark text
int xx = x;
if (text.markStart()) {
final int p = text.pos();
while (text.more()) {
final int cw = charW(g, text.curr());
if (text.inMark()) {
g.setColor(GUIConstants.color(3));
g.fillRect(xx, y - fontH + 4, cw, fontH);
}
xx += cw;
text.next();
}
text.pos(p);
}
if (found()) {
int cw = 0;
for (int c = 0; c < keyword.length(); ++c) {
cw += charW(g, keyword.charAt(c));
}
g.setColor(GUIConstants.color(text.cursor() == text.pos() ? 5 : 2));
g.fillRect(x, y - fontH + 4, cw, fontH);
}
// don't write whitespaces
if (ch > ' ') {
g.setColor(color);
String n = text.nextWord();
int ww = w - x;
if (x + wordW > ww) {
// shorten string if it cannot be completely shown (saves memory)
int c = 0;
for (final int nl = n.length(); c < nl && ww > 0; c++) {
ww -= charW(g, n.charAt(c));
}
n = n.substring(0, c);
}
g.drawString(n, x, y);
} else if (ch <= TokenBuilder.MARK) {
g.setFont(font);
}
// show cursor
if (cursor && text.edited()) {
xx = x;
final int p = text.pos();
while (text.more()) {
if (text.cursor() == text.pos()) {
cursor(g, xx);
break;
}
xx += charW(g, text.next());
}
text.pos(p);
}
}
next();
}
/**
* Writes the text.
*
* @param g graphics reference
* @param pos current text position
*/
private void write(final Graphics g, final int pos) {
init(g, pos);
while (more(g)) write(g);
if (cursor && text.cursor() == text.size()) cursor(g, x);
}
/** Cuts the selected text to the clipboard. */
final void cut() {
text.pos(text.cursor());
if (copy()) delete();
}
@Override
public void keyReleased(final KeyEvent e) {
if (undo != null) undo.store(text.text(), text.cursor());
}
@Override
public void keyPressed(final KeyEvent e) {
if (modifier(e)) return;
// operations that change the focus are put first..
if (PREVTAB.is(e)) {
transferFocusBackward();
return;
}
if (NEXTTAB.is(e)) {
transferFocus();
return;
}
if (FIND.is(e)) {
if (find != null) find.requestFocusInWindow();
return;
}
// re-animate cursor
cursor(true);
// operations without cursor movement...
final int fh = rend.fontH();
if (SCROLLDOWN.is(e)) {
scroll.pos(scroll.pos() + fh);
return;
}
if (SCROLLUP.is(e)) {
scroll.pos(scroll.pos() - fh);
return;
}
if (COPY1.is(e) || COPY2.is(e)) {
copy();
return;
}
// set cursor position and reset last column
text.pos(text.cursor());
if (!PREVLINE.is(e) && !NEXTLINE.is(e)) lastCol = -1;
if (FINDNEXT.is(e) || FINDNEXT2.is(e)) {
scroll(rend.find(true, true));
return;
}
if (FINDPREV.is(e) || FINDPREV2.is(e)) {
scroll(rend.find(false, true));
return;
}
if (SELECTALL.is(e)) {
selectAll();
return;
}
// necessary on Macs as the shift button is pressed for REDO
final boolean marking =
e.isShiftDown()
&& !DELNEXT.is(e)
&& !DELPREV.is(e)
&& !PASTE2.is(e)
&& !COMMENT.is(e)
&& !DELLINE.is(e)
&& !REDOSTEP.is(e);
final boolean nomark = !text.marked();
if (marking && nomark) text.startMark();
boolean down = true;
boolean consumed = true;
// operations that consider the last text mark..
final byte[] txt = text.text();
if (NEXTWORD.is(e)) {
text.nextToken(marking);
} else if (PREVWORD.is(e)) {
text.prevToken(marking);
down = false;
} else if (TEXTSTART.is(e)) {
if (!marking) text.noMark();
text.pos(0);
down = false;
} else if (TEXTEND.is(e)) {
if (!marking) text.noMark();
text.pos(text.size());
} else if (LINESTART.is(e)) {
text.bol(marking);
down = false;
} else if (LINEEND.is(e)) {
text.eol(marking);
} else if (NEXTPAGE.is(e)) {
down(getHeight() / fh, marking);
} else if (PREVPAGE.is(e)) {
up(getHeight() / fh, marking);
down = false;
} else if (NEXT.is(e)) {
text.next(marking);
} else if (PREV.is(e)) {
text.prev(marking);
down = false;
} else if (PREVLINE.is(e)) {
up(1, marking);
down = false;
} else if (NEXTLINE.is(e)) {
down(1, marking);
} else if (FINDERROR.is(e)) {
final int p = text.error();
if (p != -1) setCaret(p);
} else {
consumed = false;
}
if (marking) {
// refresh scroll position
text.endMark();
text.checkMark();
} else if (undo != null) {
// edit operations...
if (CUT1.is(e) || CUT2.is(e)) {
cut();
} else if (PASTE1.is(e) || PASTE2.is(e)) {
paste();
} else if (UNDOSTEP.is(e)) {
undo();
} else if (REDOSTEP.is(e)) {
redo();
} else if (COMMENT.is(e)) {
text.comment(rend.getSyntax());
} else if (DELLINE.is(e)) {
text.deleteLine();
} else if (DELLINEEND.is(e) || DELNEXTWORD.is(e) || DELNEXT.is(e)) {
if (nomark) {
if (text.pos() == text.size()) return;
text.startMark();
if (DELNEXTWORD.is(e)) {
text.nextToken(true);
} else if (DELLINEEND.is(e)) {
text.eol(true);
} else {
text.next(true);
}
text.endMark();
}
undo.cursor(text.cursor());
text.delete();
} else if (DELLINESTART.is(e) || DELPREVWORD.is(e) || DELPREV.is(e)) {
if (nomark) {
if (text.pos() == 0) return;
text.startMark();
if (DELPREVWORD.is(e)) {
text.prevToken(true);
} else if (DELLINESTART.is(e)) {
text.bol(true);
} else {
text.prev();
}
text.endMark();
}
undo.cursor(text.cursor());
text.delete();
down = false;
} else {
consumed = false;
}
}
if (consumed) e.consume();
text.setCaret();
if (txt != text.text()) rend.calc();
showCursor(down ? 2 : 0);
}