Introduced CPlusPlus::FindUsages.

src/libs/cplusplus/FindUsages.cpp

+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "FindUsages.h"
+#include "TypeOfExpression.h"
+
+#include <Control.h>
+#include <Literals.h>
+#include <Names.h>
+#include <Symbols.h>
+#include <AST.h>
+
+#include <QtCore/QDir>
+
+using namespace CPlusPlus;
+
+FindUsages::FindUsages(Document::Ptr doc, const Snapshot &snapshot, QFutureInterface<Usage> *future)
+    : ASTVisitor(doc->control()),
+      _future(future),
+      _doc(doc),
+      _snapshot(snapshot),
+      _source(_doc->source()),
+      _sem(doc->control()),
+      _inSimpleDeclaration(0)
+{
+    _snapshot.insert(_doc);
+}
+
+void FindUsages::setGlobalNamespaceBinding(NamespaceBindingPtr globalNamespaceBinding)
+{
+    _globalNamespaceBinding = globalNamespaceBinding;
+}
+
+QList<int> FindUsages::operator()(Symbol *symbol, Identifier *id, AST *ast)
+{
+    _references.clear();
+    _declSymbol = symbol;
+    _id = id;
+    _exprDoc = Document::create("<references>");
+    accept(ast);
+    return _references;
+}
+
+QString FindUsages::matchingLine(const Token &tk) const
+{
+    const char *beg = _source.constData();
+    const char *cp = beg + tk.offset;
+    for (; cp != beg - 1; --cp) {
+        if (*cp == '\n')
+            break;
+    }
+
+    ++cp;
+
+    const char *lineEnd = cp + 1;
+    for (; *lineEnd; ++lineEnd) {
+        if (*lineEnd == '\n')
+            break;
+    }
+
+    const QString matchingLine = QString::fromUtf8(cp, lineEnd - cp);
+    return matchingLine;
+}
+
+void FindUsages::reportResult(unsigned tokenIndex, const QList<Symbol *> &candidates)
+{
+    const bool isStrongResult = checkCandidates(candidates);
+
+    if (isStrongResult)
+        reportResult(tokenIndex);
+}
+
+void FindUsages::reportResult(unsigned tokenIndex)
+{
+    const Token &tk = tokenAt(tokenIndex);
+    const QString lineText = matchingLine(tk);
+
+    unsigned line, col;
+    getTokenStartPosition(tokenIndex, &line, &col);
+
+    if (col)
+        --col;  // adjust the column position.
+
+    const int len = tk.f.length;
+
+    if (_future) {
+        const QString path = QDir::toNativeSeparators(_doc->fileName());
+        _future->reportResult(Usage(path, line, lineText, col, len));
+    }
+
+    _references.append(tokenIndex);
+}
+
+bool FindUsages::checkCandidates(const QList<Symbol *> &candidates) const
+{
+    if (Symbol *canonicalSymbol = LookupContext::canonicalSymbol(candidates, _globalNamespaceBinding.data())) {
+
+#if 0
+        qDebug() << "*** canonical symbol:" << canonicalSymbol->fileName()
+                << canonicalSymbol->line() << canonicalSymbol->column()
+                << "candidates:" << candidates.size();
+#endif
+
+        return checkSymbol(canonicalSymbol);
+    }
+
+    return false;
+}
+
+bool FindUsages::checkScope(Symbol *symbol, Symbol *otherSymbol) const
+{
+    if (! (symbol && otherSymbol))
+        return false;
+
+    else if (symbol->scope() == otherSymbol->scope())
+        return true;
+
+    else if (symbol->name() && otherSymbol->name()) {
+
+        if (! symbol->name()->isEqualTo(otherSymbol->name()))
+            return false;
+
+    } else if (symbol->name() != otherSymbol->name()) {
+        return false;
+    }
+
+    return checkScope(symbol->enclosingSymbol(), otherSymbol->enclosingSymbol());
+}
+
+bool FindUsages::checkSymbol(Symbol *symbol) const
+{
+    if (! symbol) {
+        return false;
+
+    } else if (symbol == _declSymbol) {
+        return true;
+
+    } else if (symbol->line() == _declSymbol->line() && symbol->column() == _declSymbol->column()) {
+        if (! qstrcmp(symbol->fileName(), _declSymbol->fileName()))
+            return true;
+
+    } else if (symbol->isForwardClassDeclaration() && (_declSymbol->isClass() ||
+                                                       _declSymbol->isForwardClassDeclaration())) {
+        return checkScope(symbol, _declSymbol);
+
+    } else if (_declSymbol->isForwardClassDeclaration() && (symbol->isClass() ||
+                                                            symbol->isForwardClassDeclaration())) {
+        return checkScope(symbol, _declSymbol);
+    }
+
+    return false;
+}
+
+LookupContext FindUsages::currentContext(AST *ast)
+{
+    unsigned line, column;
+    getTokenStartPosition(ast->firstToken(), &line, &column);
+    Symbol *lastVisibleSymbol = _doc->findSymbolAt(line, column);
+
+    if (lastVisibleSymbol && lastVisibleSymbol == _previousContext.symbol())
+        return _previousContext;
+
+    LookupContext ctx(lastVisibleSymbol, _exprDoc, _doc, _snapshot);
+    _previousContext = ctx;
+    return ctx;
+}
+
+void FindUsages::ensureNameIsValid(NameAST *ast)
+{
+    if (ast && ! ast->name)
+        ast->name = _sem.check(ast, /*scope = */ 0);
+}
+
+bool FindUsages::visit(MemInitializerAST *ast)
+{
+    if (ast->name && ast->name->asSimpleName() != 0) {
+        ensureNameIsValid(ast->name);
+
+        SimpleNameAST *simple = ast->name->asSimpleName();
+        if (identifier(simple->identifier_token) == _id) {
+            LookupContext context = currentContext(ast);
+            const QList<Symbol *> candidates = context.resolve(simple->name);
+            reportResult(simple->identifier_token, candidates);
+        }
+    }
+    accept(ast->expression);
+    return false;
+}
+
+bool FindUsages::visit(PostfixExpressionAST *ast)
+{
+    _postfixExpressionStack.append(ast);
+    return true;
+}
+
+void FindUsages::endVisit(PostfixExpressionAST *)
+{
+    _postfixExpressionStack.removeLast();
+}
+
+bool FindUsages::visit(MemberAccessAST *ast)
+{
+    if (ast->member_name) {
+        if (SimpleNameAST *simple = ast->member_name->asSimpleName()) {
+            if (identifier(simple->identifier_token) == _id) {
+                Q_ASSERT(! _postfixExpressionStack.isEmpty());
+
+                checkExpression(_postfixExpressionStack.last()->firstToken(),
+                                simple->identifier_token);
+
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+void FindUsages::checkExpression(unsigned startToken, unsigned endToken)
+{
+    const unsigned begin = tokenAt(startToken).begin();
+    const unsigned end = tokenAt(endToken).end();
+
+    const QString expression = _source.mid(begin, end - begin);
+    // qDebug() << "*** check expression:" << expression;
+
+    TypeOfExpression typeofExpression;
+    typeofExpression.setSnapshot(_snapshot);
+
+    unsigned line, column;
+    getTokenStartPosition(startToken, &line, &column);
+    Symbol *lastVisibleSymbol = _doc->findSymbolAt(line, column);
+
+    const QList<TypeOfExpression::Result> results =
+            typeofExpression(expression, _doc, lastVisibleSymbol,
+                             TypeOfExpression::Preprocess);
+
+    QList<Symbol *> candidates;
+
+    foreach (TypeOfExpression::Result r, results) {
+        FullySpecifiedType ty = r.first;
+        Symbol *lastVisibleSymbol = r.second;
+
+        candidates.append(lastVisibleSymbol);
+    }
+
+    reportResult(endToken, candidates);
+}
+
+bool FindUsages::visit(QualifiedNameAST *ast)
+{
+    for (NestedNameSpecifierAST *nested_name_specifier = ast->nested_name_specifier;
+         nested_name_specifier; nested_name_specifier = nested_name_specifier->next) {
+
+        if (NameAST *class_or_namespace_name = nested_name_specifier->class_or_namespace_name) {
+            SimpleNameAST *simple_name = class_or_namespace_name->asSimpleName();
+
+            TemplateIdAST *template_id = 0;
+            if (! simple_name) {
+                template_id = class_or_namespace_name->asTemplateId();
+
+                if (template_id) {
+                    for (TemplateArgumentListAST *template_arguments = template_id->template_arguments;
+                         template_arguments; template_arguments = template_arguments->next) {
+                        accept(template_arguments->template_argument);
+                    }
+                }
+            }
+
+            if (simple_name || template_id) {
+                const unsigned identifier_token = simple_name
+                           ? simple_name->identifier_token
+                           : template_id->identifier_token;
+
+                if (identifier(identifier_token) == _id)
+                    checkExpression(ast->firstToken(), identifier_token);
+            }
+        }
+    }
+
+    if (NameAST *unqualified_name = ast->unqualified_name) {
+        unsigned identifier_token = 0;
+
+        if (SimpleNameAST *simple_name = unqualified_name->asSimpleName())
+            identifier_token = simple_name->identifier_token;
+
+        else if (DestructorNameAST *dtor_name = unqualified_name->asDestructorName())
+            identifier_token = dtor_name->identifier_token;
+
+        TemplateIdAST *template_id = 0;
+        if (! identifier_token) {
+            template_id = unqualified_name->asTemplateId();
+
+            if (template_id) {
+                identifier_token = template_id->identifier_token;
+
+                for (TemplateArgumentListAST *template_arguments = template_id->template_arguments;
+                     template_arguments; template_arguments = template_arguments->next) {
+                    accept(template_arguments->template_argument);
+                }
+            }
+        }
+
+        if (identifier_token && identifier(identifier_token) == _id)
+            checkExpression(ast->firstToken(), identifier_token);
+    }
+
+    return false;
+}
+
+bool FindUsages::visit(EnumeratorAST *ast)
+{
+    Identifier *id = identifier(ast->identifier_token);
+    if (id == _id) {
+        LookupContext context = currentContext(ast);
+        const QList<Symbol *> candidates = context.resolve(control()->nameId(id));
+        reportResult(ast->identifier_token, candidates);
+    }
+
+    accept(ast->expression);
+
+    return false;
+}
+
+bool FindUsages::visit(SimpleNameAST *ast)
+{
+    Identifier *id = identifier(ast->identifier_token);
+    if (id == _id) {
+        LookupContext context = currentContext(ast);
+        const QList<Symbol *> candidates = context.resolve(ast->name);
+        reportResult(ast->identifier_token, candidates);
+    }
+
+    return false;
+}
+
+bool FindUsages::visit(DestructorNameAST *ast)
+{
+    Identifier *id = identifier(ast->identifier_token);
+    if (id == _id) {
+        LookupContext context = currentContext(ast);
+        const QList<Symbol *> candidates = context.resolve(ast->name);
+        reportResult(ast->identifier_token, candidates);
+    }
+
+    return false;
+}
+
+bool FindUsages::visit(TemplateIdAST *ast)
+{
+    if (_id == identifier(ast->identifier_token)) {
+        LookupContext context = currentContext(ast);
+        const QList<Symbol *> candidates = context.resolve(ast->name);
+        reportResult(ast->identifier_token, candidates);
+    }
+
+    for (TemplateArgumentListAST *template_arguments = ast->template_arguments;
+         template_arguments; template_arguments = template_arguments->next) {
+        accept(template_arguments->template_argument);
+    }
+
+    return false;
+}
+
+bool FindUsages::visit(ParameterDeclarationAST *ast)
+{
+    for (SpecifierAST *spec = ast->type_specifier; spec; spec = spec->next)
+        accept(spec);
+
+    if (DeclaratorAST *declarator = ast->declarator) {
+        for (SpecifierAST *attr = declarator->attributes; attr; attr = attr->next)
+            accept(attr);
+
+        for (PtrOperatorAST *ptr_op = declarator->ptr_operators; ptr_op; ptr_op = ptr_op->next)
+            accept(ptr_op);
+
+        if (! _inSimpleDeclaration) // visit the core declarator only if we are not in simple-declaration.
+            accept(declarator->core_declarator);
+
+        for (PostfixDeclaratorAST *fx_op = declarator->postfix_declarators; fx_op; fx_op = fx_op->next)
+            accept(fx_op);
+
+        for (SpecifierAST *spec = declarator->post_attributes; spec; spec = spec->next)
+            accept(spec);
+
+        accept(declarator->initializer);
+    }
+
+    accept(ast->expression);
+    return false;
+}
+
+bool FindUsages::visit(ExpressionOrDeclarationStatementAST *ast)
+{
+    accept(ast->declaration);
+    return false;
+}
+
+bool FindUsages::visit(FunctionDeclaratorAST *ast)
+{
+    accept(ast->parameters);
+
+    for (SpecifierAST *spec = ast->cv_qualifier_seq; spec; spec = spec->next)
+        accept(spec);
+
+    accept(ast->exception_specification);
+
+    return false;
+}
+
+bool FindUsages::visit(SimpleDeclarationAST *)
+{
+    ++_inSimpleDeclaration;
+    return true;
+}
+
+void FindUsages::endVisit(SimpleDeclarationAST *)
+{ --_inSimpleDeclaration; }

src/libs/cplusplus/FindUsages.h

+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef FINDUSAGES_H
+#define FINDUSAGES_H
+
+#include "LookupContext.h"
+#include "CppDocument.h"
+#include "CppBindings.h"
+#include "Semantic.h"
+
+#include <ASTVisitor.h>
+#include <QtCore/QFutureInterface>
+
+namespace CPlusPlus {
+
+class CPLUSPLUS_EXPORT Usage
+{
+public:
+    Usage()
+        : line(0), col(0), len(0) {}
+
+    Usage(const QString &path, int line, const QString &lineText, int col, int len)
+        : path(path), line(line), lineText(lineText), col(col), len(len) {}
+
+public:
+    QString path;
+    int line;
+    QString lineText;
+    int col;
+    int len;
+};
+
+class CPLUSPLUS_EXPORT FindUsages: protected ASTVisitor
+{
+public:
+    FindUsages(Document::Ptr doc, const Snapshot &snapshot, QFutureInterface<Usage> *future);
+
+    void setGlobalNamespaceBinding(NamespaceBindingPtr globalNamespaceBinding);
+
+    QList<int> operator()(Symbol *symbol, Identifier *id, AST *ast);
+
+protected:
+    using ASTVisitor::visit;
+    using ASTVisitor::endVisit;
+
+    QString matchingLine(const Token &tk) const;
+
+    void reportResult(unsigned tokenIndex, const QList<Symbol *> &candidates);
+    void reportResult(unsigned tokenIndex);
+
+    bool checkSymbol(Symbol *symbol) const;
+    bool checkCandidates(const QList<Symbol *> &candidates) const;
+    bool checkScope(Symbol *symbol, Symbol *otherSymbol) const;
+    void checkExpression(unsigned startToken, unsigned endToken);
+
+    LookupContext currentContext(AST *ast);
+
+    void ensureNameIsValid(NameAST *ast);
+
+    virtual bool visit(MemInitializerAST *ast);
+    virtual bool visit(PostfixExpressionAST *ast);
+    virtual void endVisit(PostfixExpressionAST *);
+    virtual bool visit(MemberAccessAST *ast);
+    virtual bool visit(QualifiedNameAST *ast);
+    virtual bool visit(EnumeratorAST *ast);
+    virtual bool visit(SimpleNameAST *ast);
+    virtual bool visit(DestructorNameAST *ast);
+    virtual bool visit(TemplateIdAST *ast);
+    virtual bool visit(ParameterDeclarationAST *ast);
+    virtual bool visit(ExpressionOrDeclarationStatementAST *ast);
+    virtual bool visit(FunctionDeclaratorAST *ast);
+    virtual bool visit(SimpleDeclarationAST *);
+    virtual void endVisit(SimpleDeclarationAST *);
+
+private:
+    QFutureInterface<Usage> *_future;
+    Identifier *_id;
+    Symbol *_declSymbol;
+    Document::Ptr _doc;
+    Snapshot _snapshot;
+    QByteArray _source;
+    Document::Ptr _exprDoc;
+    Semantic _sem;
+    NamespaceBindingPtr _globalNamespaceBinding;
+    QList<PostfixExpressionAST *> _postfixExpressionStack;
+    QList<QualifiedNameAST *> _qualifiedNameStack;
+    QList<int> _references;
+    LookupContext _previousContext;
+    int _inSimpleDeclaration;
+};
+
+} // end of namespace CPlusPlus
+
+#endif // FINDUSAGES_H

src/libs/cplusplus/cplusplus-lib.pri

@@ -38,6 +38,7 @@ HEADERS += \
     $$PWD/CppBindings.h \
     $$PWD/ASTParent.h \
     $$PWD/GenTemplateInstance.h \
+    $$PWD/FindUsages.h \
     $$PWD/CheckUndefinedSymbols.h \
     $$PWD/PreprocessorClient.h \
     $$PWD/PreprocessorEnvironment.h \
@@ -61,6 +62,7 @@ SOURCES += \
     $$PWD/CppBindings.cpp \
     $$PWD/ASTParent.cpp \
     $$PWD/GenTemplateInstance.cpp \
+    $$PWD/FindUsages.cpp \
     $$PWD/CheckUndefinedSymbols.cpp \
     $$PWD/PreprocessorClient.cpp \
     $$PWD/PreprocessorEnvironment.cpp \

src/plugins/cpptools/cppfindreferences.cpp

@@ -50,11 +50,8 @@
 
 #include <cplusplus/CppDocument.h>
 #include <cplusplus/CppBindings.h>
-#include <cplusplus/ExpressionUnderCursor.h>
-#include <cplusplus/ResolveExpression.h>
 #include <cplusplus/Overview.h>
-#include <cplusplus/TypeOfExpression.h>
-#include <cplusplus/FastPreprocessor.h>
+#include <cplusplus/FindUsages.h>
 
 #include <QtCore/QTime>
 #include <QtCore/QtConcurrentRun>
@@ -65,438 +62,6 @@
 using namespace CppTools::Internal;
 using namespace CPlusPlus;
 
-namespace {
-
-struct Process: protected ASTVisitor
-{
-public:
-    Process(Document::Ptr doc, const Snapshot &snapshot,
-            QFutureInterface<Utils::FileSearchResult> *future)
-            : ASTVisitor(doc->control()),
-              _future(future),
-              _doc(doc),
-              _snapshot(snapshot),