forked from qt-creator/qt-creator
56baf8c058
Since we also license under GPL-3.0 WITH Qt-GPL-exception-1.0,
this applies only to a hypothetical newer version of GPL, that doesn't
exist yet. If such a version emerges, we can still decide to relicense...
While at it, replace (deprecated) GPL-3.0 with more explicit GPL-3.0-only
Change was done by running
find . -type f -exec perl -pi -e "s/LicenseRef-Qt-Commercial OR GPL-3.0\+ OR GPL-3.0 WITH Qt-GPL-exception-1.0/LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0/g" {} \;
Change-Id: I5097e6ce8d10233993ee30d7e25120e2659eb10b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include "qmlexpressionundercursor.h"
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#include <qmljs/parser/qmljsast_p.h>
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#include <qmljs/qmljsscanner.h>
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#include <QTextBlock>
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#include <QDebug>
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using namespace QmlJS;
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using namespace QmlJS::AST;
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namespace {
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class ExpressionUnderCursor
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{
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QTextCursor _cursor;
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Scanner scanner;
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public:
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int start = 0;
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int end = 0;
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int startState(const QTextBlock &block) const
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{
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int state = block.previous().userState();
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if (state == -1)
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return 0;
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return state & 0xff;
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}
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QString operator()(const QTextCursor &cursor)
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{
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return process(cursor);
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}
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int startOfExpression(const QList<Token> &tokens) const
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{
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return startOfExpression(tokens, tokens.size() - 1);
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}
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int startOfExpression(const QList<Token> &tokens, int index) const
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{
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if (index != -1) {
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const Token &tk = tokens.at(index);
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if (tk.is(Token::Identifier)) {
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if (index > 0 && tokens.at(index - 1).is(Token::Dot))
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index = startOfExpression(tokens, index - 2);
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} else if (tk.is(Token::RightParenthesis)) {
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do { --index; }
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while (index != -1 && tokens.at(index).isNot(Token::LeftParenthesis));
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if (index > 0 && tokens.at(index - 1).is(Token::Identifier))
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index = startOfExpression(tokens, index - 1);
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} else if (tk.is(Token::RightBracket)) {
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do { --index; }
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while (index != -1 && tokens.at(index).isNot(Token::LeftBracket));
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if (index > 0 && tokens.at(index - 1).is(Token::Identifier))
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index = startOfExpression(tokens, index - 1);
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}
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}
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return index;
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}
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QString process(const QTextCursor &cursor)
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{
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_cursor = cursor;
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QTextBlock block = _cursor.block();
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const QString blockText = block.text().left(cursor.positionInBlock());
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scanner.setScanComments(false);
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const QList<Token> tokens = scanner(blockText, startState(block));
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int start = startOfExpression(tokens);
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if (start == -1)
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return QString();
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const Token &tk = tokens.at(start);
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return blockText.mid(tk.begin(), tokens.last().end() - tk.begin());
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}
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};
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} // enf of anonymous namespace
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using namespace QmlJSEditor;
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using namespace QmlJSEditor::Internal;
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QmlExpressionUnderCursor::QmlExpressionUnderCursor()
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: _expressionNode(nullptr), _expressionOffset(0), _expressionLength(0)
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{}
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ExpressionNode *QmlExpressionUnderCursor::operator()(const QTextCursor &cursor)
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{
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_expressionNode = nullptr;
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_expressionOffset = -1;
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_expressionLength = -1;
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ExpressionUnderCursor expressionUnderCursor;
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_text = expressionUnderCursor(cursor);
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Document::MutablePtr newDoc = Document::create(Utils::FilePath::fromString("<expression>"),
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Dialect::JavaScript);
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newDoc->setSource(_text);
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newDoc->parseExpression();
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exprDoc = newDoc;
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_expressionNode = exprDoc->expression();
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_expressionOffset = cursor.block().position() + expressionUnderCursor.start;
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_expressionLength = expressionUnderCursor.end - expressionUnderCursor.start;
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return _expressionNode;
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}
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ExpressionNode *QmlExpressionUnderCursor::expressionNode() const
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{
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return _expressionNode;
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}
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