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Added a simple scanner to get the expression under cursor.

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This commit is contained in:
Roberto Raggi
2010-01-22 14:42:15 +01:00
parent 5640bf5d26
commit 099f2072a2
2 changed files with 183 additions and 77 deletions
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182
src/plugins/qmljseditor/qmlcodecompletion.cpp
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@@ -30,13 +30,13 @@
#include "qmlcodecompletion.h"
#include "qmljseditor.h"
#include "qmlmodelmanagerinterface.h"
#include "qmlexpressionundercursor.h"
#include "qmllookupcontext.h"
#include "qmlresolveexpression.h"
#include <qmljs/parser/qmljsast_p.h>
#include <qmljs/qmljsinterpreter.h>
#include <qmljs/qmljssymbol.h>
#include <qmljs/qmljsscanner.h>
#include <texteditor/basetexteditor.h>
#include <coreplugin/icore.h>
@@ -94,7 +94,102 @@ static QIcon iconForColor(const QColor &color)
namespace {
class Evaluate: public QmlJS::AST::Visitor
class ExpressionUnderCursor
{
QTextCursor _cursor;
QmlJSScanner scanner;
public:
QString operator()(const QTextCursor &cursor)
{
_cursor = cursor;
QTextBlock block = _cursor.block();
const QString blockText = block.text().left(cursor.columnNumber());
//qDebug() << "block text:" << blockText;
int startState = block.previous().userState();
if (startState == -1)
startState = 0;
else
startState = startState & 0xff;
const QList<Token> originalTokens = scanner(blockText, startState);
QList<Token> tokens;
int skipping = 0;
for (int index = originalTokens.size() - 1; index != -1; --index) {
const Token &tk = originalTokens.at(index);
if (tk.is(Token::Comment) || tk.is(Token::String) || tk.is(Token::Number))
continue;
if (! skipping) {
tokens.append(tk);
if (tk.is(Token::Identifier)) {
if (index > 0 && originalTokens.at(index - 1).isNot(Token::Dot))
break;
}
} else {
//qDebug() << "skip:" << blockText.mid(tk.offset, tk.length);
}
if (tk.is(Token::RightParenthesis))
++skipping;
else if (tk.is(Token::LeftParenthesis)) {
--skipping;
if (! skipping)
tokens.append(tk);
}
}
if (! tokens.isEmpty()) {
QString expr;
for (int index = tokens.size() - 1; index >= 0; --index) {
Token tk = tokens.at(index);
expr.append(QLatin1Char(' '));
expr.append(blockText.midRef(tk.offset, tk.length));
}
//qDebug() << "expression under cursor:" << expr;
return expr;
}
//qDebug() << "no expression";
return QString();
}
};
class SearchPropertyDefinitions: protected AST::Visitor
{
QList<AST::UiPublicMember *> _properties;
public:
QList<AST::UiPublicMember *> operator()(AST::Node *node)
{
_properties.clear();
if (node)
node->accept(this);
return _properties;
}
protected:
using AST::Visitor::visit;
virtual bool visit(AST::UiPublicMember *member)
{
if (member->propertyToken.isValid()) {
_properties.append(member);
}
return true;
}
};
class Evaluate: protected QmlJS::AST::Visitor
{
QmlJS::Interpreter::Engine *_interp;
const QmlJS::Interpreter::Value *_value;
@@ -127,17 +222,20 @@ protected:
return previousValue;
}
virtual bool preVisit(QmlJS::AST::Node *ast)
virtual bool preVisit(QmlJS::AST::Node *ast) // ### remove me
{
using namespace QmlJS::AST;
if (cast<NumericLiteral *>(ast))
return true;
if (cast<StringLiteral *>(ast))
else if (cast<StringLiteral *>(ast))
return true;
if (cast<IdentifierExpression *>(ast))
else if (cast<IdentifierExpression *>(ast))
return true;
else if (cast<NestedExpression *>(ast))
return true;
else if (cast<FieldMemberExpression *>(ast))
@@ -149,6 +247,11 @@ protected:
return false;
}
virtual bool visit(QmlJS::AST::NestedExpression *)
{
return true;
}
virtual bool visit(QmlJS::AST::StringLiteral *)
{
_value = _interp->convertToObject(_interp->stringValue());
@@ -163,13 +266,19 @@ protected:
virtual bool visit(QmlJS::AST::IdentifierExpression *ast)
{
if (! ast->name)
return false;
_value = _interp->globalObject()->property(ast->name->asString());
return false;
}
virtual bool visit(QmlJS::AST::FieldMemberExpression *ast)
{
if (const QmlJS::Interpreter::Value *base = evaluate(ast->base)) {
if (! ast->name)
return false;
if (const QmlJS::Interpreter::Value *base = _interp->convertToObject(evaluate(ast->base))) {
if (const QmlJS::Interpreter::ObjectValue *obj = base->asObjectValue()) {
_value = obj->property(ast->name->asString());
}
@@ -366,30 +475,28 @@ void FunctionArgumentWidget::updateArgumentHighlight()
updateHintText();
#if 0
QString str = m_editor->textAt(m_startpos, curpos - m_startpos);
int argnr = 0;
int parcount = 0;
SimpleLexer tokenize;
QList<SimpleToken> tokens = tokenize(str);
QmlJSScanner tokenize;
const QList<Token> tokens = tokenize(str);
for (int i = 0; i < tokens.count(); ++i) {
const SimpleToken &tk = tokens.at(i);
if (tk.is(T_LPAREN))
const Token &tk = tokens.at(i);
if (tk.is(Token::LeftParenthesis))
++parcount;
else if (tk.is(T_RPAREN))
else if (tk.is(Token::RightParenthesis))
--parcount;
else if (! parcount && tk.is(T_COMMA))
else if (! parcount && tk.is(Token::Colon))
++argnr;
}
if (m_currentarg != argnr) {
m_currentarg = argnr;
// m_currentarg = argnr;
updateHintText();
}
if (parcount < 0)
m_popupFrame->close();
#endif
}
bool FunctionArgumentWidget::eventFilter(QObject *obj, QEvent *e)
@@ -511,12 +618,11 @@ int QmlCodeCompletion::startCompletion(TextEditor::ITextEditable *editor)
if (! edit)
return -1;
int pos = editor->position();
m_startPosition = editor->position();
while (editor->characterAt(pos - 1).isLetterOrNumber() || editor->characterAt(pos - 1) == QLatin1Char('_'))
--pos;
while (editor->characterAt(m_startPosition - 1).isLetterOrNumber() || editor->characterAt(m_startPosition - 1) == QLatin1Char('_'))
--m_startPosition;
m_startPosition = pos;
m_completions.clear();
QmlJS::Document::Ptr qmlDocument = edit->qmlDocument();
@@ -579,20 +685,12 @@ int QmlCodeCompletion::startCompletion(TextEditor::ITextEditable *editor)
}
if (completionOperator == QLatin1Char('.') || completionOperator == QLatin1Char('(')) {
const int endOfExpression = m_startPosition - 1;
int startOfExpression = endOfExpression - 2;
ExpressionUnderCursor expressionUnderCursor;
while (startOfExpression >= 0) {
const QChar ch = editor->characterAt(startOfExpression);
QTextCursor tc = edit->textCursor();
tc.setPosition(m_startPosition - 1);
if (ch.isLetterOrNumber() || ch == QLatin1Char('_') || ch == QLatin1Char('.'))
--startOfExpression;
else
break;
}
++startOfExpression;
const QString expression = m_editor->textAt(startOfExpression, endOfExpression - startOfExpression);
const QString expression = expressionUnderCursor(tc);
//qDebug() << "expression:" << expression;
QmlJS::Document::Ptr exprDoc = QmlJS::Document::create(QLatin1String("<expression>"));
@@ -603,6 +701,15 @@ int QmlCodeCompletion::startCompletion(TextEditor::ITextEditable *editor)
Interpreter::Engine interp;
Evaluate evaluate(&interp);
SearchPropertyDefinitions searchPropertyDefinitions;
const QList<AST::UiPublicMember *> properties = searchPropertyDefinitions(qmlDocument->ast());
foreach (AST::UiPublicMember *prop, properties) {
if (prop->name && prop->memberType && prop->memberType->asString() == QLatin1String("string")) {
interp.globalObject()->setProperty(prop->name->asString(), interp.stringValue());
}
}
const Interpreter::Value *value = interp.convertToObject(evaluate(exprDoc->ast()));
//qDebug() << "type:" << interp.typeId(value);
@@ -619,20 +726,18 @@ int QmlCodeCompletion::startCompletion(TextEditor::ITextEditable *editor)
item.icon = symbolIcon;
m_completions.append(item);
}
} else if (value && completionOperator == QLatin1Char('(')) {
if (const Interpreter::FunctionValue *f = value->asFunctionValue()) {
QString functionName = expression;
int indexOfDot = expression.lastIndexOf(QLatin1Char('.'));
if (indexOfDot != -1)
functionName = expression.mid(indexOfDot + 1);
// Recreate if necessary
if (!m_functionArgumentWidget)
m_functionArgumentWidget = new QmlJSEditor::Internal::FunctionArgumentWidget;
m_functionArgumentWidget->showFunctionHint(functionName,
f->argumentCount(),
m_startPosition);
m_functionArgumentWidget->showFunctionHint(functionName.trimmed(), f->argumentCount(), m_startPosition);
}
return -1;
@@ -655,7 +760,10 @@ int QmlCodeCompletion::startCompletion(TextEditor::ITextEditable *editor)
m_completions.append(m_snippets);
}
return pos;
if (! m_completions.isEmpty())
return m_startPosition;
return -1;
}
void QmlCodeCompletion::completions(QList<TextEditor::CompletionItem> *completions)