TikzEditor::TikzEditor(QWidget *parent) : QPlainTextEdit(parent)
{
m_showWhiteSpaces = true;
m_showTabulators = true;
m_showMatchingBrackets = true;
m_whiteSpacesColor = Qt::gray;
m_tabulatorsColor = Qt::gray;
m_matchingColor = Qt::yellow;
m_highlightCurrentLineColor = Qt::yellow;;
m_completer = 0;
// setLineWidth(0);
// setFrameShape(QFrame::NoFrame);
const QColor lineColor(QApplication::style()->standardPalette().color(QPalette::Normal, QPalette::Base));
const QColor altLineColor(QApplication::style()->standardPalette().color(QPalette::Normal, QPalette::AlternateBase));
// if (lineColor == altLineColor)
// m_highlightCurrentLineColor = lineColor.darker(105);
// else
// m_highlightCurrentLineColor = altLineColor;
connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(highlightCurrentLine()));
highlightCurrentLine();
connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(showCursorPosition()));
connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(matchBrackets()));
}
/*
Adapted from OSC-pattern-match.c, by Matt Wright
Adapted from oscpattern.c, by Matt Wright and Amar Chaudhury
*/
bool OscPattern::match(const char * pattern, const char * test)
{
// theWholePattern = pattern;
if (pattern == 0 || pattern[0] == 0)
{
return test[0] == 0;
}
if (test[0] == 0)
{
if (pattern[0] == '*')
return match(pattern+1,test);
else
return false;
}
switch (pattern[0])
{
case 0:
return test[0] == 0;
case '?':
return match(pattern + 1, test + 1);
case '*':
if (match(pattern+1, test))
return true;
else
return match(pattern, test+1);
case ']':
case '}':
// OSCWarning("Spurious %c in pattern \".../%s/...\"",pattern[0], theWholePattern);
return false;
case '[':
return matchBrackets (pattern,test);
case '{':
return matchList (pattern,test);
case '\\':
if (pattern[1] == 0)
return test[0] == 0;
else
{
if (pattern[1] == test[0])
return match(pattern+2,test+1);
else
return false;
}
default:
if (pattern[0] == test[0])
return match(pattern+1,test+1);
else
return false;
}
}
bf_command* ParseBF(const char* file, int* num, int* read, int* error){
/* Our own counters */
int prse_error = 0, prse_read = 0, prse_num = 0;
/* Loading the file */
FILE* fp = fopen(file, "r");
if (!fp) {
printf("Parse error: could not read file.\n");
return NULL;
}
/* Initializations */
bf_command* prgm = NULL;
bf_command* tmp;
int end = 0, halt = 0;
int current = -1;
char c = getc(fp);
char last = 'A';
while (!end && !halt) {
switch (c) {
case EOF:
end = 1;
break;
case '+':
prse_read++;
if (last == c) {
prgm[current].val++;
}
else {
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_add;
prgm[current].val = 1;
}
}
last = c;
break;
case '-':
prse_read++;
if (last == c) {
prgm[current].val++;
}
else {
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_subtract;
prgm[current].val = 1;
}
}
last = c;
break;
case '>':
prse_read++;
if (last == c) {
prgm[current].val++;
}
else {
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_right;
prgm[current].val = 1;
}
}
last = c;
break;
case '<':
prse_read++;
if (last == c) {
prgm[current].val++;
}
else {
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_left;
prgm[current].val = 1;
}
}
last = c;
break;
case ',':
prse_read++;
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_input;
prgm[current].val = -1;
}
last = c;
break;
case '.':
prse_read++;
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_output;
prgm[current].val = -1;
}
last = c;
break;
case '[':
prse_read++;
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_open;
prgm[current].val = -1;
}
last = c;
break;
case ']':
prse_read++;
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_close;
prgm[current].val = -1;
}
last = c;
break;
case '~':
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_debug;
prgm[current].val = -1;
}
last = c;
break;
default:
break;
}
c = getc(fp);
}
if (!halt) {
tmp = realloc(prgm, (prse_num + 1) * sizeof(bf_command));
if (!tmp) {
printf("Parser error! Ran out of memory at command %d.\n", prse_num);
prse_error = PARSE_MEMORY;
prgm[current].type = bf_end;
halt = 1;
}
else {
prgm = tmp;
prse_num++;
current = prse_num - 1;
prgm[current].type = bf_end;
prgm[current].val = 1;
}
}
prse_error |= matchBrackets(prgm);
if (read) {
*read = prse_read;
}
if (num) {
*num = prse_num;
}
if (error) {
*error = prse_error;
}
return prgm;
}
void TikzEditor::keyPressEvent(QKeyEvent *event)
{
const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
/* completer */
if (m_completer && m_completer->popup()->isVisible())
{
// the following keys are forwarded by the completer to the widget
switch (event->key())
{
case Qt::Key_Enter:
case Qt::Key_Return:
case Qt::Key_Escape:
case Qt::Key_Tab:
case Qt::Key_Backtab:
event->ignore();
return;
}
}
/* scroll viewport when Ctrl+Up and Ctrl+Down are pressed */
if (event->modifiers() == Qt::ControlModifier && event->key() == Qt::Key_Up)
{
const int dy = -1 + verticalScrollBar()->value();
verticalScrollBar()->setValue(dy);
}
else if (event->modifiers() == Qt::ControlModifier && event->key() == Qt::Key_Down)
{
const int dy = 1 + verticalScrollBar()->value();
verticalScrollBar()->setValue(dy);
}
/* ensure that PageUp and PageDown keep the cursor at the same visible place */
/*
else if (event->key() == Qt::Key_PageUp || event->key() == Qt::Key_PageDown)
{
const QTextCursor::MoveOperation moveOperation
= (event->key() == Qt::Key_PageUp) ? QTextCursor::Up : QTextCursor::Down;
QTextCursor cursor = textCursor();
const QFontMetrics fontMetrics(document()->defaultFont());
const int repeat = viewport()->height() / fontMetrics.lineSpacing() - 1;
const int oldPosition = cursorRect().top();
if (modifier & Qt::ShiftModifier)
cursor.movePosition(moveOperation, QTextCursor::KeepAnchor, repeat);
else
cursor.movePosition(moveOperation, QTextCursor::MoveAnchor, repeat);
setTextCursor(cursor);
const int newPosition = verticalScrollBar()->value() + cursorRect().top() - oldPosition;
verticalScrollBar()->setValue(newPosition);
ensureCursorVisible();
}
*/
/* the first time End is pressed moves the cursor to the end of the line, the second time to the end of the block */
else if (event->key() == Qt::Key_Home
&& !(modifier & Qt::ControlModifier)
&& !(modifier & Qt::ShiftModifier))
{
QTextCursor cursor = textCursor();
const int oldPosition = cursor.position();
cursor.movePosition(QTextCursor::StartOfLine);
if (cursor.position() == oldPosition)
cursor.movePosition(QTextCursor::StartOfBlock);
setTextCursor(cursor);
ensureCursorVisible();
}
else if (event->key() == Qt::Key_End
&& !(modifier & Qt::ControlModifier)
&& !(modifier & Qt::ShiftModifier))
{
QTextCursor cursor = textCursor();
const int oldPosition = cursor.position();
cursor.movePosition(QTextCursor::EndOfLine);
if (cursor.position() == oldPosition)
cursor.movePosition(QTextCursor::EndOfBlock);
setTextCursor(cursor);
ensureCursorVisible();
}
/* keys that change the content without moving the cursor may alter the brackets too */
else if (event->key() == Qt::Key_Delete || (event->key() == Qt::Key_Z && (modifier & Qt::ControlModifier)))
{
QPlainTextEdit::keyPressEvent(event);
highlightCurrentLine();
matchBrackets(); // calculate new bracket highlighting
}
/* go to next argument in text inserted with code completion */
else if (event->key() == Qt::Key_Tab || event->key() == Qt::Key_Backtab)
{
QTextCursor cursor = textCursor();
QTextBlock block = cursor.block();
QTextDocument::FindFlags flags = 0;
if (event->key() == Qt::Key_Backtab)
flags = QTextDocument::FindBackward;
if (block.isValid() && block.text().contains(s_completionPlaceHolder))
{
cursor = document()->find(s_completionPlaceHolder, cursor, flags);
if (!cursor.isNull())
setTextCursor(cursor);
else
QPlainTextEdit::keyPressEvent(event);
}
else
QPlainTextEdit::keyPressEvent(event);
}
else
QPlainTextEdit::keyPressEvent(event);
/* completer */
if (m_completer)
{
// const QString endOfWord("~!@#$%^&*()_+{}|:\"<>?,./;'[]-= ");
const QString completionPrefix = textUnderCursor();
if ((event->modifiers() & (Qt::ControlModifier | Qt::AltModifier))
|| (event->text().isEmpty() && event->key() != Qt::Key_AltGr)
|| completionPrefix.length() < 3)
// || endOfWord.contains(event->text().right(1)))
{
m_completer->popup()->hide();
}
else
{
if (completionPrefix != m_completer->completionPrefix())
{
m_completer->setCompletionPrefix(completionPrefix);
m_completer->popup()->setCurrentIndex(m_completer->completionModel()->index(0, 0));
}
if (m_completer->completionPrefix() != m_completer->currentCompletion())
// || m_completer->completionCount() > 1)
{
QTextCursor cursor = textCursor();
// cursor.movePosition(QTextCursor::StartOfWord);
cursor.movePosition(QTextCursor::Left, QTextCursor::MoveAnchor, m_completer->completionPrefix().length());
QRect rect = cursorRect(cursor);
rect.translate(5, 5);
rect.setWidth(m_completer->popup()->sizeHintForColumn(0)
+ m_completer->popup()->verticalScrollBar()->sizeHint().width());
m_completer->complete(rect); // show popup
}
else
m_completer->popup()->hide();
}
}
}
