Combine the source file, line and column number triplet in a common structure

This avoids unnecessary function calls when all of the three pieces need
to be retrieved from a QQmlBoundSignalExpression.

Change-Id: Ibcd498c907ea723baf6439cf32ca5fc704f204b5
Reviewed-by: Ulf Hermann <ulf.hermann@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

4 files changed, 28 insertions, 41 deletions

diff --git a/src/qml/qml/qqmlboundsignal.cpp b/src/qml/qml/qqmlboundsignal.cpp
index 8c3e1c7384..f7ece53121 100644
--- a/src/qml/qml/qqmlboundsignal.cpp
+++ b/src/qml/qml/qqmlboundsignal.cpp
@@ -72,9 +72,7 @@ QQmlBoundSignalExpression::ExtraData::ExtraData(const QString &handlerName, cons
     : m_handlerName(handlerName),
       m_parameterString(parameterString),
       m_expression(expression),
-      m_fileName(fileName),
-      m_line(line),
-      m_column(column)
+      m_sourceLocation(fileName, line, column)
 {
 }
 
@@ -124,7 +122,8 @@ QQmlBoundSignalExpression::~QQmlBoundSignalExpression()
 QString QQmlBoundSignalExpression::expressionIdentifier(QQmlJavaScriptExpression *e)
 {
     QQmlBoundSignalExpression *This = static_cast<QQmlBoundSignalExpression *>(e);
-    return This->sourceFile() + QLatin1Char(':') + QString::number(This->lineNumber());
+    QQmlSourceLocation loc = This->sourceLocation();
+    return loc.sourceFile + QLatin1Char(':') + QString::number(loc.line);
 }
 
 void QQmlBoundSignalExpression::expressionChanged(QQmlJavaScriptExpression *)
@@ -132,37 +131,19 @@ void QQmlBoundSignalExpression::expressionChanged(QQmlJavaScriptExpression *)
     // bound signals do not notify on change.
 }
 
-QString QQmlBoundSignalExpression::sourceFile() const
+QQmlSourceLocation QQmlBoundSignalExpression::sourceLocation() const
 {
     if (expressionFunctionValid()) {
         QV4::Function *f = function();
         Q_ASSERT(f);
-        return f->sourceFile();
+        QQmlSourceLocation loc;
+        loc.sourceFile = f->sourceFile();
+        loc.line = f->compiledFunction->location.line;
+        loc.column = f->compiledFunction->location.column;
+        return loc;
     }
     Q_ASSERT(!m_extra.isNull());
-    return m_extra->m_fileName;
-}
-
-quint16 QQmlBoundSignalExpression::lineNumber() const
-{
-    if (expressionFunctionValid()) {
-        QV4::Function *f = function();
-        Q_ASSERT(f);
-        return f->compiledFunction->location.line;
-    }
-    Q_ASSERT(!m_extra.isNull());
-    return m_extra->m_line;
-}
-
-quint16 QQmlBoundSignalExpression::columnNumber() const
-{
-    if (expressionFunctionValid()) {
-        QV4::Function *f = function();
-        Q_ASSERT(f);
-        return f->compiledFunction->location.column;
-    }
-    Q_ASSERT(!m_extra.isNull());
-    return m_extra->m_column;
+    return m_extra->m_sourceLocation;
 }
 
 QString QQmlBoundSignalExpression::expression() const
@@ -236,7 +217,7 @@ void QQmlBoundSignalExpression::evaluate(void **a)
             m_extra->m_parameterString.clear();
 
             m_v8function = evalFunction(context(), scopeObject(), expression,
-                                        m_extra->m_fileName, m_extra->m_line, &m_v8qmlscope);
+                                        m_extra->m_sourceLocation.sourceFile, m_extra->m_sourceLocation.line, &m_v8qmlscope);
 
             if (m_v8function.isNullOrUndefined()) {
                 ep->dereferenceScarceResources();
diff --git a/src/qml/qml/qqmlboundsignal_p.h b/src/qml/qml/qqmlboundsignal_p.h
index 93cff745e2..6df6da4214 100644
--- a/src/qml/qml/qqmlboundsignal_p.h
+++ b/src/qml/qml/qqmlboundsignal_p.h
@@ -86,9 +86,7 @@ public:
     // evaluation of a bound signal expression doesn't return any value
     void evaluate(void **a);
 
-    QString sourceFile() const;
-    quint16 lineNumber() const;
-    quint16 columnNumber() const;
+    QQmlSourceLocation sourceLocation() const;
     QString expression() const;
     QV4::Function *function() const;
     QObject *target() const { return m_target; }
@@ -120,9 +118,7 @@ private:
         QString m_handlerName;
         QString m_parameterString;
         QString m_expression;
-        QString m_fileName;
-        quint16 m_line;
-        quint16 m_column;
+        QQmlSourceLocation m_sourceLocation;
     };
 
     // We store some flag bits in the following flag pointers.
diff --git a/src/qml/qml/qqmlengine.cpp b/src/qml/qml/qqmlengine.cpp
index 6554ddc740..e9a0858474 100644
--- a/src/qml/qml/qqmlengine.cpp
+++ b/src/qml/qml/qqmlengine.cpp
@@ -1617,11 +1617,11 @@ void QQmlData::destroyed(QObject *object)
             QString locationString;
             QQmlBoundSignalExpression *expr = signalHandler->expression();
             if (expr) {
-                QString fileName = expr->sourceFile();
-                if (fileName.isEmpty())
-                    fileName = QStringLiteral("<Unknown File>");
-                locationString.append(fileName);
-                locationString.append(QString::fromLatin1(":%0: ").arg(expr->lineNumber()));
+                QQmlSourceLocation location = expr->sourceLocation();
+                if (location.sourceFile.isEmpty())
+                    location.sourceFile = QStringLiteral("<Unknown File>");
+                locationString.append(location.sourceFile);
+                locationString.append(QString::fromLatin1(":%0: ").arg(location.line));
                 QString source = expr->expression();
                 if (source.size() > 100) {
                     source.truncate(96);
diff --git a/src/qml/qml/qqmlglobal_p.h b/src/qml/qml/qqmlglobal_p.h
index eca13e8fb8..8a17c81895 100644
--- a/src/qml/qml/qqmlglobal_p.h
+++ b/src/qml/qml/qqmlglobal_p.h
@@ -368,6 +368,16 @@ public:
     QStringList args;
 };
 
+struct QQmlSourceLocation
+{
+    QQmlSourceLocation() : line(0), column(0) {}
+    QQmlSourceLocation(const QString &sourceFile, quint16 line, quint16 column)
+        : sourceFile(sourceFile), line(line), column(column) {}
+    QString sourceFile;
+    quint16 line;
+    quint16 column;
+};
+
 QT_END_NAMESPACE
 
 #endif // QQMLGLOBAL_H