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// Copyright (C) 2016 Lorenz Haas
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "configurationeditor.h"
#include "abstractsettings.h"
#include <texteditor/fontsettings.h>
#include <texteditor/texteditorsettings.h>
#include <utils/qtcassert.h>
#include <QAbstractItemView>
#include <QCompleter>
#include <QScrollBar>
#include <QStringListModel>
namespace Beautifier {
namespace Internal {
ConfigurationSyntaxHighlighter::ConfigurationSyntaxHighlighter(QTextDocument *parent) :
QSyntaxHighlighter(parent)
{
const TextEditor::FontSettings fs = TextEditor::TextEditorSettings::fontSettings();
m_formatKeyword = fs.toTextCharFormat(TextEditor::C_FIELD);
m_formatComment = fs.toTextCharFormat(TextEditor::C_COMMENT);
m_expressionComment.setPattern("#[^\\n]*");
}
void ConfigurationSyntaxHighlighter::setKeywords(const QStringList &keywords)
{
if (keywords.isEmpty())
return;
// Check for empty keywords since they can cause an endless loop in highlightBlock().
QStringList pattern;
for (const QString &word : keywords) {
if (!word.isEmpty())
pattern << QRegularExpression::escape(word);
}
m_expressionKeyword.setPattern("(?:\\s|^)(" + pattern.join('|') + ")(?=\\s|\\:|\\=|\\,|$)");
}
void ConfigurationSyntaxHighlighter::setCommentExpression(const QRegularExpression &rx)
{
m_expressionComment = rx;
}
void ConfigurationSyntaxHighlighter::highlightBlock(const QString &text)
{
QRegularExpressionMatchIterator it = m_expressionKeyword.globalMatch(text);
while (it.hasNext()) {
const QRegularExpressionMatch match = it.next();
setFormat(match.capturedStart(), match.capturedLength(), m_formatKeyword);
}
it = m_expressionComment.globalMatch(text);
while (it.hasNext()) {
const QRegularExpressionMatch match = it.next();
setFormat(match.capturedStart(), match.capturedLength(), m_formatComment);
}
}
ConfigurationEditor::ConfigurationEditor(QWidget *parent) :
QPlainTextEdit(parent),
m_completer(new QCompleter(this)),
m_model(new QStringListModel(QStringList(), m_completer)),
m_highlighter(new ConfigurationSyntaxHighlighter(document()))
{
m_completer->setModel(m_model);
m_completer->setModelSorting(QCompleter::CaseInsensitivelySortedModel);
m_completer->setWrapAround(false);
m_completer->setWidget(this);
m_completer->setCompletionMode(QCompleter::PopupCompletion);
m_completer->setCaseSensitivity(Qt::CaseInsensitive);
m_completer->popup()->installEventFilter(this);
connect(m_completer, QOverload<const QString &>::of(&QCompleter::activated),
this, &ConfigurationEditor::insertCompleterText);
connect(this, &ConfigurationEditor::cursorPositionChanged,
this, &ConfigurationEditor::updateDocumentation);
}
void ConfigurationEditor::setSettings(AbstractSettings *settings)
{
QTC_ASSERT(settings, return);
m_settings = settings;
QStringList keywords = m_settings->options();
m_highlighter->setKeywords(keywords);
keywords << m_settings->completerWords();
keywords.sort(Qt::CaseInsensitive);
m_model->setStringList(keywords);
}
void ConfigurationEditor::setCommentExpression(const QRegularExpression &rx)
{
m_highlighter->setCommentExpression(rx);
}
// Workaround for handling "ESC" right when popup is shown.
bool ConfigurationEditor::eventFilter(QObject *object, QEvent *event)
{
if (event->type() == QEvent::ShortcutOverride) {
auto key = static_cast<const QKeyEvent *>(event);
if (key->key() == Qt::Key_Escape) {
event->accept();
m_completer->popup()->hide();
return true;
}
}
return QObject::eventFilter(object, event);
}
void ConfigurationEditor::keyPressEvent(QKeyEvent *event)
{
const int key = event->key();
if (key == Qt::Key_Escape) {
event->ignore();
return;
}
if (m_completer->popup()->isVisible()) {
switch (key) {
case Qt::Key_Backtab:
case Qt::Key_Enter:
case Qt::Key_Return:
case Qt::Key_Tab:
event->ignore();
return;
default:
break;
}
}
const bool isShortcut = (event->modifiers() & Qt::ControlModifier) && key == Qt::Key_Space;
if (!isShortcut)
QPlainTextEdit::keyPressEvent(event);
const int cursorPosition = textCursor().position();
const QTextCursor cursor = cursorForTextUnderCursor();
const QString prefix = cursor.selectedText();
if (!isShortcut && (prefix.length() < 2 || cursorPosition != cursor.position())) {
m_completer->popup()->hide();
return;
}
if (prefix != m_completer->completionPrefix()) {
m_completer->setCompletionPrefix(prefix);
m_completer->popup()->setCurrentIndex(m_completer->completionModel()->index(0, 0));
}
if (m_completer->completionCount() == 1 && prefix == m_completer->currentCompletion()) {
m_completer->popup()->hide();
return;
}
QRect popupRect = cursorRect();
popupRect.setWidth(m_completer->popup()->sizeHintForColumn(0)
+ m_completer->popup()->verticalScrollBar()->sizeHint().width());
m_completer->complete(popupRect);
}
// Hack because '-' and '=' are treated as End/StartOfWord
QTextCursor ConfigurationEditor::cursorForTextUnderCursor(QTextCursor tc) const
{
if (tc.isNull())
tc = textCursor();
tc.movePosition(QTextCursor::StartOfWord, QTextCursor::MoveAnchor);
QChar ch = document()->characterAt(tc.position() - 1);
while (!(ch.isNull() || ch.isSpace() || ch == ':' || ch == ',')) {
tc.movePosition(QTextCursor::PreviousCharacter, QTextCursor::MoveAnchor);
ch = document()->characterAt(tc.position() - 1);
}
tc.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
ch = document()->characterAt(tc.position());
while (!(ch.isNull() || ch.isSpace() || ch == ':' || ch == ',')) {
tc.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor);
ch = document()->characterAt(tc.position());
}
return tc;
}
void ConfigurationEditor::insertCompleterText(const QString &text)
{
QTextCursor tc = textCursor();
// Replace entire word to get case sensitivity right.
tc.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor,
m_completer->completionPrefix().length());
tc.insertText(text);
setTextCursor(tc);
}
void ConfigurationEditor::updateDocumentation()
{
QTC_CHECK(m_settings);
QTextCursor cursor = textCursor();
QString word = cursorForTextUnderCursor(cursor).selectedText();
if (word == m_lastDocumentation)
return;
QString doc = m_settings->documentation(word);
if (!doc.isEmpty()) {
m_lastDocumentation = word;
emit documentationChanged(word, doc);
return;
}
// If the documentation was empty, then try to use the line's first word or the first word
// in front of a colon for providing a documentation.
cursor.movePosition(QTextCursor::PreviousWord);
cursor.movePosition(QTextCursor::StartOfBlock, QTextCursor::KeepAnchor);
const int pos = cursor.selectedText().lastIndexOf(',');
if (-1 != pos) {
cursor.setPosition(cursor.position() + pos);
cursor.movePosition(QTextCursor::NextWord);
}
word = cursorForTextUnderCursor(cursor).selectedText();
if (word == m_lastDocumentation)
return;
doc = m_settings->documentation(word);
if (doc.isEmpty())
return;
m_lastDocumentation = word;
emit documentationChanged(word, doc);
}
} // namespace Internal
} // namespace Beautifier
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