forked from qt-creator/qt-creator
Generalized ExpressionUnderCursor and got rid of duplicate code.
Done-with: Roberto Raggi
This commit is contained in:
Erik Verbruggen
@@ -30,11 +30,9 @@
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#include "qmlexpressionundercursor.h"
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#include <qmljs/parser/qmljsast_p.h>
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#include <qmljs/parser/qmljsastvisitor_p.h>
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#include <qmljs/parser/qmljsengine_p.h>
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#include <qmljs/parser/qmljslexer_p.h>
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#include <qmljs/parser/qmljsnodepool_p.h>
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#include <qmljs/parser/qmljsparser_p.h>
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#include <qmljs/qmljsscanner.h>
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#include <QtGui/QTextBlock>
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#include <QDebug>
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@@ -43,162 +41,84 @@ using namespace QmlJS::AST;
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namespace QmlJSEditor {
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namespace Internal {
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class PositionCalculator: protected Visitor
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class ExpressionUnderCursor
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{
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QTextCursor _cursor;
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QmlJSScanner scanner;
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public:
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Node *operator()(Node *ast, int pos)
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ExpressionUnderCursor()
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: start(0), end(0)
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{}
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int start, end;
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QString operator()(const QTextCursor &cursor)
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{
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_pos = pos;
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_expression = 0;
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_offset = -1;
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_length = -1;
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_cursor = cursor;
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Node::accept(ast, this);
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QTextBlock block = _cursor.block();
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const QString blockText = block.text().left(cursor.columnNumber());
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//qDebug() << "block text:" << blockText;
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return _expression;
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}
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int startState = block.previous().userState();
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if (startState == -1)
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startState = 0;
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else
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startState = startState & 0xff;
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int offset() const
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{ return _offset; }
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const QList<Token> originalTokens = scanner(blockText, startState);
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QList<Token> tokens;
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int skipping = 0;
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for (int index = originalTokens.size() - 1; index != -1; --index) {
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const Token &tk = originalTokens.at(index);
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int length() const
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{ return _length; }
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if (tk.is(Token::Comment) || tk.is(Token::String) || tk.is(Token::Number))
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continue;
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protected:
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bool visit(FieldMemberExpression *ast)
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{
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if (ast->identifierToken.offset <= _pos && _pos <= ast->identifierToken.end()) {
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_expression = ast;
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_offset = ast->identifierToken.offset;
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_length = ast->identifierToken.length;
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}
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if (! skipping) {
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tokens.append(tk);
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return true;
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}
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bool visit(IdentifierExpression *ast)
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{
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if (ast->firstSourceLocation().offset <= _pos && _pos <= ast->lastSourceLocation().end()) {
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_expression = ast;
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_offset = ast->firstSourceLocation().offset;
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_length = ast->lastSourceLocation().end() - _offset;
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}
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return false;
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}
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bool visit(UiImport * /*ast*/)
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{
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return false;
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}
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bool visit(UiQualifiedId *ast)
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{
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if (ast->identifierToken.offset <= _pos) {
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for (UiQualifiedId *iter = ast; iter; iter = iter->next) {
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if (_pos <= iter->identifierToken.end()) {
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// found it
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_expression = ast;
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_offset = ast->identifierToken.offset;
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for (UiQualifiedId *iter2 = ast; iter2; iter2 = iter2->next) {
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_length = iter2->identifierToken.end() - _offset;
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}
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break;
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if (tk.is(Token::Identifier)) {
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if (index > 0 && originalTokens.at(index - 1).isNot(Token::Dot))
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break;
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}
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} else {
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//qDebug() << "skip:" << blockText.mid(tk.offset, tk.length);
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}
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if (tk.is(Token::RightParenthesis) || tk.is(Token::RightBracket))
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++skipping;
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else if (tk.is(Token::LeftParenthesis) || tk.is(Token::LeftBracket)) {
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--skipping;
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if (! skipping)
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tokens.append(tk);
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if (index > 0 && originalTokens.at(index - 1).isNot(Token::Identifier))
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break;
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}
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}
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return false;
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}
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if (! tokens.isEmpty()) {
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QString expr;
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for (int index = tokens.size() - 1; index >= 0; --index) {
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Token tk = tokens.at(index);
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expr.append(QLatin1Char(' '));
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expr.append(blockText.midRef(tk.offset, tk.length));
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private:
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quint32 _pos;
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Node *_expression;
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int _offset;
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int _length;
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};
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class ScopeCalculator: protected Visitor
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{
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public:
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QStack<Symbol*> operator()(const Document::Ptr &doc, int pos)
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{
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_doc = doc;
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_pos = pos;
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_scopes.clear();
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_currentSymbol = 0;
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Node::accept(doc->qmlProgram(), this);
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return _scopes;
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}
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protected:
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virtual bool visit(Block * /*ast*/)
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{
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// TODO
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// if (_pos > ast->lbraceToken.end() && _pos < ast->rbraceToken.offset) {
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// push(ast);
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// Node::accept(ast->statements, this);
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// }
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return false;
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}
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virtual bool visit(UiObjectBinding *ast)
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{
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if (ast->initializer && ast->initializer->lbraceToken.offset < _pos && _pos <= ast->initializer->rbraceToken.end()) {
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push(ast);
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Node::accept(ast->initializer, this);
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}
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start = tokens.first().begin();
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end = tokens.first().end();
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//qDebug() << "expression under cursor:" << expr;
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return expr;
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}
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return false;
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//qDebug() << "no expression";
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return QString();
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}
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virtual bool visit(UiObjectDefinition *ast)
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{
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if (ast->initializer && ast->initializer->lbraceToken.offset < _pos && _pos <= ast->initializer->rbraceToken.end()) {
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push(ast);
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Node::accept(ast->initializer, this);
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}
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return false;
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}
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virtual bool visit(UiArrayBinding *ast)
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{
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if (ast->lbracketToken.offset < _pos && _pos <= ast->rbracketToken.end()) {
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push(ast);
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Node::accept(ast->members, this);
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}
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return false;
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}
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private:
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void push(Node *node)
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{
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SymbolFromFile* symbol;
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if (_currentSymbol) {
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symbol = _currentSymbol->findMember(node);
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} else {
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symbol = _doc->findSymbol(node);
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}
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if (symbol) {
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_currentSymbol = symbol;
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if (!cast<UiArrayBinding*>(node))
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_scopes.push(symbol);
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}
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}
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private:
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Document::Ptr _doc;
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quint32 _pos;
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QStack<Symbol*> _scopes;
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SymbolFromFile* _currentSymbol;
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};
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}
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}
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@@ -207,101 +127,32 @@ using namespace QmlJSEditor;
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using namespace QmlJSEditor::Internal;
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QmlExpressionUnderCursor::QmlExpressionUnderCursor()
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: _expressionNode(0),
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_pos(0), _engine(0), _nodePool(0)
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{
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}
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: _expressionNode(0), _expressionOffset(0), _expressionLength(0)
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{}
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QmlExpressionUnderCursor::~QmlExpressionUnderCursor()
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QmlJS::AST::ExpressionNode *QmlExpressionUnderCursor::operator()(const QTextCursor &cursor)
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{
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if (_engine) { delete _engine; _engine = 0; }
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if (_nodePool) { delete _nodePool; _nodePool = 0; }
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}
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void QmlExpressionUnderCursor::operator()(const QTextCursor &cursor,
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const Document::Ptr &doc)
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{
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if (_engine) { delete _engine; _engine = 0; }
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if (_nodePool) { delete _nodePool; _nodePool = 0; }
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_pos = cursor.position();
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_expressionNode = 0;
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_expressionOffset = -1;
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_expressionLength = -1;
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_expressionScopes.clear();
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const QTextBlock block = cursor.block();
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parseExpression(block);
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ExpressionUnderCursor expressionUnderCursor;
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_text = expressionUnderCursor(cursor);
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if (_expressionOffset != -1) {
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ScopeCalculator calculator;
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_expressionScopes = calculator(doc, _expressionOffset);
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}
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exprDoc = Document::create(QLatin1String("<expression>"));
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exprDoc->setSource(_text);
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exprDoc->parseExpression();
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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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void QmlExpressionUnderCursor::parseExpression(const QTextBlock &block)
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ExpressionNode *QmlExpressionUnderCursor::expressionNode() const
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{
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int textPosition = _pos - block.position();
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const QString blockText = block.text();
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if (textPosition > 0) {
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if (blockText.at(textPosition - 1) == QLatin1Char('.'))
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--textPosition;
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} else {
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textPosition = 0;
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}
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const QString text = blockText.left(textPosition);
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Node *node = 0;
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if (UiObjectMember *binding = tryBinding(text)) {
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// qDebug() << "**** binding";
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node = binding;
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} else if (Statement *stmt = tryStatement(text)) {
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// qDebug() << "**** statement";
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node = stmt;
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} else {
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// qDebug() << "**** none";
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}
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if (node) {
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PositionCalculator calculator;
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_expressionNode = calculator(node, textPosition);
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_expressionOffset = calculator.offset() + block.position();
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_expressionLength = calculator.length();
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}
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return _expressionNode;
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}
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Statement *QmlExpressionUnderCursor::tryStatement(const QString &text)
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{
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_engine = new Engine();
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_nodePool = new NodePool("", _engine);
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Lexer lexer(_engine);
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Parser parser(_engine);
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lexer.setCode(text, /*line = */ 1);
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if (parser.parseStatement())
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return parser.statement();
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else
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return 0;
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}
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UiObjectMember *QmlExpressionUnderCursor::tryBinding(const QString &text)
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{
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_engine = new Engine();
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_nodePool = new NodePool("", _engine);
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Lexer lexer(_engine);
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Parser parser(_engine);
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lexer.setCode(text, /*line = */ 1);
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if (parser.parseUiObjectMember()) {
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UiObjectMember *member = parser.uiObjectMember();
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if (cast<UiObjectBinding*>(member) || cast<UiArrayBinding*>(member) || cast<UiScriptBinding*>(member))
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return member;
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else
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return 0;
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} else {
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return 0;
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}
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}
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