qt/api/qscriptengine_p.h

   1 /*
   2     Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18 */
  19
  20 #ifndef qscriptengine_p_h
  21 #define qscriptengine_p_h
  22
  23 #include "qscriptconverter_p.h"
  24 #include "qscriptengine.h"
  25 #include "qscriptstring_p.h"
  26 #include "qscriptsyntaxcheckresult_p.h"
  27 #include "qscriptvalue.h"
  28 #include <JavaScriptCore/JavaScript.h>
  29 #include <JSBasePrivate.h>
  30 #include <QtCore/qshareddata.h>
  31 #include <QtCore/qstring.h>
  32
  33 class QScriptEngine;
  34 class QScriptSyntaxCheckResultPrivate;
  35
  36 class QScriptEnginePrivate : public QSharedData {
  37 public:
  38     static QScriptEnginePrivate* get(const QScriptEngine* q) { Q_ASSERT(q); return q->d_ptr.data(); }
  39     static QScriptEngine* get(const QScriptEnginePrivate* d) { Q_ASSERT(d); return d->q_ptr; }
  40
  41     QScriptEnginePrivate(const QScriptEngine*);
  42     ~QScriptEnginePrivate();
  43
  44     QScriptSyntaxCheckResultPrivate* checkSyntax(const QString& program);
  45     QScriptValuePrivate* evaluate(const QString& program, const QString& fileName, int lineNumber);
  46     QScriptValuePrivate* evaluate(const QScriptProgramPrivate* program);
  47     inline JSValueRef evaluate(JSStringRef program, JSStringRef fileName, int lineNumber);
  48
  49     inline void collectGarbage();
  50     inline void reportAdditionalMemoryCost(int cost);
  51
  52     inline JSValueRef makeJSValue(double number) const;
  53     inline JSValueRef makeJSValue(int number) const;
  54     inline JSValueRef makeJSValue(uint number) const;
  55     inline JSValueRef makeJSValue(const QString& string) const;
  56     inline JSValueRef makeJSValue(bool number) const;
  57     inline JSValueRef makeJSValue(QScriptValue::SpecialValue value) const;
  58
  59     QScriptValuePrivate* globalObject() const;
  60
  61     inline QScriptStringPrivate* toStringHandle(const QString& str) const;
  62
  63     inline JSGlobalContextRef context() const;
  64 private:
  65     QScriptEngine* q_ptr;
  66     JSGlobalContextRef m_context;
  67 };
  68
  69
  70 /*!
  71   Evaluates given JavaScript program and returns result of the evaluation.
  72   \attention this function doesn't take ownership of the parameters.
  73   \internal
  74 */
  75 JSValueRef QScriptEnginePrivate::evaluate(JSStringRef program, JSStringRef fileName, int lineNumber)
  76 {
  77     JSValueRef exception;
  78     JSValueRef result = JSEvaluateScript(m_context, program, /* Global Object */ 0, fileName, lineNumber, &exception);
  79     if (!result)
  80         return exception; // returns an exception
  81     return result;
  82 }
  83
  84 void QScriptEnginePrivate::collectGarbage()
  85 {
  86     JSGarbageCollect(m_context);
  87 }
  88
  89 void QScriptEnginePrivate::reportAdditionalMemoryCost(int cost)
  90 {
  91     if (cost > 0)
  92         JSReportExtraMemoryCost(m_context, cost);
  93 }
  94
  95 JSValueRef QScriptEnginePrivate::makeJSValue(double number) const
  96 {
  97     return JSValueMakeNumber(m_context, number);
  98 }
  99
 100 JSValueRef QScriptEnginePrivate::makeJSValue(int number) const
 101 {
 102     return JSValueMakeNumber(m_context, number);
 103 }
 104
 105 JSValueRef QScriptEnginePrivate::makeJSValue(uint number) const
 106 {
 107     return JSValueMakeNumber(m_context, number);
 108 }
 109
 110 JSValueRef QScriptEnginePrivate::makeJSValue(const QString& string) const
 111 {
 112     JSStringRef tmp = QScriptConverter::toString(string);
 113     JSValueRef result = JSValueMakeString(m_context, tmp);
 114     JSStringRelease(tmp);
 115     return result;
 116 }
 117
 118 JSValueRef QScriptEnginePrivate::makeJSValue(bool value) const
 119 {
 120     return JSValueMakeBoolean(m_context, value);
 121 }
 122
 123 JSValueRef QScriptEnginePrivate::makeJSValue(QScriptValue::SpecialValue value) const
 124 {
 125     if (value == QScriptValue::NullValue)
 126         return JSValueMakeNull(m_context);
 127     return JSValueMakeUndefined(m_context);
 128 }
 129
 130 QScriptStringPrivate* QScriptEnginePrivate::toStringHandle(const QString& str) const
 131 {
 132     return new QScriptStringPrivate(str);
 133 }
 134
 135 JSGlobalContextRef QScriptEnginePrivate::context() const
 136 {
 137     return m_context;
 138 }
 139
 140 #endif