Dateien, die als Parameter übergeben werden, werden nach dem Start direkt geladen
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256
barecode/src/editor/VariableCompleter.cpp
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256
barecode/src/editor/VariableCompleter.cpp
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#include "VariableCompleter.h"
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#include "CodeEditor.h"
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#include <QTextCursor>
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#include <QTextBlock>
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#include <QKeyEvent>
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#include <QListWidgetItem>
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#include <QAbstractItemView>
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#include <QScrollBar>
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#include <QApplication>
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#include <QScreen>
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VariableCompleter::VariableCompleter(CodeEditor *editor)
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: QObject(editor)
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, m_editor(editor)
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{
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// Popup als reines Anzeige-Fenster — dieselbe Fensterart wie
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// SignatureTooltip, die nachweislich nie den Fokus an sich reißt.
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// Wichtig: Ein echtes Elternfenster (editor->window()) angeben, sonst
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// behandelt der Fenstermanager das Popup als eigenständiges Fenster.
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// Das führte dazu, dass bei mehreren offenen Dateien/Tabs verwaiste
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// Popups entstehen konnten, die den Fokus übernehmen und die
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// Texteingabe blockieren.
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m_popup = new QListWidget(editor->window());
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m_popup->setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint);
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m_popup->setAttribute(Qt::WA_ShowWithoutActivating);
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m_popup->setFocusPolicy(Qt::NoFocus);
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m_popup->setMaximumHeight(200);
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m_popup->setMinimumWidth(180);
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m_popup->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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m_popup->setStyleSheet(
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"QListWidget {"
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" border: 1px solid palette(mid);"
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" background: palette(toolTipBase);"
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" color: palette(toolTipText);"
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" font-family: Monospace;"
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"}"
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"QListWidget::item:selected {"
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" background: palette(highlight);"
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" color: palette(highlightedText);"
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"}"
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);
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connect(m_popup, &QListWidget::itemActivated,
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this, &VariableCompleter::onItemActivated);
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}
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// ---------------------------------------------------------------------------
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// Nach jedem Tastendruck aufrufen
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// ---------------------------------------------------------------------------
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void VariableCompleter::handleKeyPress(QKeyEvent *event)
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{
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// Popup-Navigation
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if (m_popup->isVisible())
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{
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if (event->key() == Qt::Key_Escape)
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{
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hidePopup();
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return;
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}
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if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter)
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{
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if (m_popup->currentItem())
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{
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onItemActivated(m_popup->currentItem());
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}
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hidePopup();
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return;
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}
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if (event->key() == Qt::Key_Down)
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{
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const int next = qMin(m_popup->currentRow() + 1,
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m_popup->count() - 1);
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m_popup->setCurrentRow(next);
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return;
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}
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if (event->key() == Qt::Key_Up)
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{
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const int prev = qMax(m_popup->currentRow() - 1, 0);
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m_popup->setCurrentRow(prev);
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return;
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}
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}
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// Nach dem normalen Tastendruck Popup aktualisieren
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// (der Event wurde bereits an QPlainTextEdit weitergegeben)
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updatePopup();
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}
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// ---------------------------------------------------------------------------
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// Popup aktualisieren
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// ---------------------------------------------------------------------------
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void VariableCompleter::updatePopup()
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{
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const QString prefix = currentPrefix();
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// Nur bei $ und mindestens einem weiteren Zeichen anzeigen
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if (prefix.length() < 2 || !prefix.startsWith('$'))
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{
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hidePopup();
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return;
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}
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const QStringList allVars = collectVariables();
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const QString filter = prefix.toLower();
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QStringList matches;
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for (const QString &var : allVars)
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{
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if (var.toLower().startsWith(filter) && var != prefix)
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{
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matches.append(var);
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}
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}
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if (matches.isEmpty())
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{
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hidePopup();
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return;
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}
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// Popup befüllen
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m_popup->clear();
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for (const QString &var : matches)
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{
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m_popup->addItem(var);
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}
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m_popup->setCurrentRow(0);
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// Größe anpassen
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const int itemHeight = m_popup->sizeHintForRow(0) + 2;
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const int height = qMin(matches.size() * itemHeight + 4, 200);
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m_popup->setFixedHeight(height);
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// Position unter dem Cursor
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const QRect cursorRect = m_editor->cursorRect();
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QPoint pos = m_editor->viewport()->mapToGlobal(
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QPoint(cursorRect.left(), cursorRect.bottom() + 2)
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);
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// Nicht aus dem Bildschirm herausragen
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const QRect screen = QApplication::primaryScreen()->availableGeometry();
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if (pos.x() + m_popup->width() > screen.right())
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{
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pos.setX(screen.right() - m_popup->width());
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}
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if (pos.y() + height > screen.bottom())
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{
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pos.setY(cursorRect.top() - height - 2);
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}
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m_popup->move(pos);
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m_popup->show();
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m_popup->raise();
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}
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void VariableCompleter::hidePopup()
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{
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m_popup->hide();
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m_popup->clear();
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}
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// ---------------------------------------------------------------------------
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// Editor hat den Fokus verloren (z. B. Tab-Wechsel) — Popup schließen
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// ---------------------------------------------------------------------------
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void VariableCompleter::notifyFocusLost()
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{
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hidePopup();
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}
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// ---------------------------------------------------------------------------
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// Variablen im aktuellen Dokument sammeln
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// ---------------------------------------------------------------------------
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QStringList VariableCompleter::collectVariables() const
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{
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static const QRegularExpression varRegex(R"(\$[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*)");
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QSet<QString> seen;
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QStringList result;
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const QString text = m_editor->toPlainText();
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QRegularExpressionMatchIterator it = varRegex.globalMatch(text);
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while (it.hasNext())
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{
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const QString var = it.next().captured(0);
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if (!seen.contains(var))
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{
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seen.insert(var);
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result.append(var);
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}
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}
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result.sort(Qt::CaseInsensitive);
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return result;
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}
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// ---------------------------------------------------------------------------
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// Text links vom Cursor — das angefangene $variable
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// ---------------------------------------------------------------------------
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QString VariableCompleter::currentPrefix() const
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{
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const QTextCursor cursor = m_editor->textCursor();
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const QString line = cursor.block().text();
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const int col = cursor.columnNumber();
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if (col == 0)
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{
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return QString();
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}
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// Rückwärts gehen bis zum $ oder einem Nicht-Bezeichner-Zeichen
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int start = col - 1;
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while (start > 0)
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{
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const QChar c = line[start - 1];
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if (!c.isLetterOrNumber() && c != '_' && c != '$')
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{
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break;
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}
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--start;
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}
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const QString token = line.mid(start, col - start);
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return token.startsWith('$') ? token : QString();
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}
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// ---------------------------------------------------------------------------
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// Klick oder Enter — Variable einfügen
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// ---------------------------------------------------------------------------
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void VariableCompleter::onItemActivated(QListWidgetItem *item)
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{
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if (!item)
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{
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return;
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}
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const QString selected = item->text();
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const QString prefix = currentPrefix();
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if (prefix.isEmpty())
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{
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hidePopup();
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return;
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}
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// Prefix durch den vollständigen Variablennamen ersetzen
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QTextCursor cursor = m_editor->textCursor();
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cursor.movePosition(QTextCursor::Left,
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QTextCursor::KeepAnchor,
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prefix.length());
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cursor.insertText(selected);
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m_editor->setTextCursor(cursor);
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hidePopup();
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}
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