private void searchForwards() throws IOException {
String input = readLine('/');
int lineNo = topLineNo;
if (input.length() <= 1) {
if (regex == null) {
setPrompt(str_no_prev);
return;
}
lineNo++;
} else {
try {
regex = Pattern.compile(input.substring(1));
} catch (PatternSyntaxException ex) {
setPrompt(str_inv_regex);
return;
}
matcher = regex.matcher("");
}
while (true) {
String line = lineStore.getLine(lineNo);
if (line == null) {
gotoLastPage();
setPrompt(str_not_found);
return;
}
matcher.reset(line);
if (matcher.find()) {
prepare(lineNo, 0).output();
return;
}
lineNo++;
}
}
/**
* Prepare lines for output by painting them to our private buffer in the reverse direction
* starting at a given end line number and (rendered) subline number.
*/
private ScreenBuffer prepareReverse(int endLineNo, int endSublineNo) {
ScreenBuffer buffer = new ScreenBuffer(false);
int lineNo = endLineNo;
String line = null;
boolean more = true;
while (more && lineNo >= 0) {
line = lineStore.getLine(lineNo);
more = prepareLine(line, lineNo, buffer);
lineNo--;
}
if (buffer.adjust(endLineNo, endSublineNo)) {
return buffer;
} else {
return prepare(0, 0);
}
}
/**
* Prepare lines for output by painting them to our private buffer in the forward direction
* starting at a given line number and (rendered) subline number.
*
* @param startLineNo
*/
private ScreenBuffer prepare(int startLineNo, int startSublineNo) {
while (true) {
ScreenBuffer buffer = new ScreenBuffer(true);
int lineNo = startLineNo;
boolean more;
do {
String line = lineStore.getLine(lineNo);
if (line == null) {
break;
}
more = prepareLine(line, lineNo, buffer);
lineNo++;
} while (more);
if (buffer.adjust(startLineNo, startSublineNo) || startLineNo == 0) {
return buffer;
} else {
startLineNo -= 1;
startSublineNo = LAST_SUBLINE;
}
}
}
