87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
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#include "codeedit.h"
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#include <QTextBlock>
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#include <QTextDocumentFragment>
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namespace QtGui {
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CodeEdit::CodeEdit(QWidget *parent) :
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QPlainTextEdit(parent),
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m_indentation(QStringLiteral(" "))
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{}
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CodeEdit::~CodeEdit()
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{}
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void CodeEdit::keyPressEvent(QKeyEvent *e)
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{
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if(textCursor().selection().isEmpty()) {
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switch(e->key()) {
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case Qt::Key_Tab:
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textCursor().insertText(m_indentation);
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return;
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case Qt::Key_Return:
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handleReturn(e);
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return;
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case Qt::Key_Backspace:
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handleDelete(e);
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return;
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default:
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;
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}
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}
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QPlainTextEdit::keyPressEvent(e);
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}
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void CodeEdit::handleReturn(QKeyEvent *)
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{
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QTextCursor cursor = textCursor();
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QString line = cursor.block().text();
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int index = 0;
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for(const QChar &c : line) {
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if(c.isSpace()) {
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++index;
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} else {
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break;
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}
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}
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if(index < line.size() && line.at(index) == QChar('}')) {
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if(index > 0) {
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int beg = index;
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index -= m_indentation.size();
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cursor.select(QTextCursor::BlockUnderCursor);
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cursor.deleteChar();
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cursor.insertBlock();
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cursor.insertText(line.mid(0, index));
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if(index + 1 < line.size()) {
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cursor.insertText(line.mid(beg));
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}
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}
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}
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cursor.insertBlock();
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if(index > 0) {
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cursor.insertText(line.mid(0, index));
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}
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if(line.endsWith(QChar('{'))) {
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cursor.insertText(m_indentation);
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}
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}
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void CodeEdit::handleDelete(QKeyEvent *e)
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{
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QTextCursor cursor = textCursor();
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QString line = cursor.block().text();
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if(line.endsWith(m_indentation)) {
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cursor.select(QTextCursor::BlockUnderCursor);
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cursor.deleteChar();
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cursor.insertBlock();
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cursor.insertText(line.mid(0, line.size() - m_indentation.size()));
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} else {
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QPlainTextEdit::keyPressEvent(e);
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}
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}
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}
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