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/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _KJSDEBUGGER_H_
#define _KJSDEBUGGER_H_
#include "interpreter.h"
namespace KJS {
class DebuggerImp;
class Interpreter;
class ExecState;
class Value;
class Object;
class UString;
class List;
class Completion;
/**
* @internal
*
* Provides an interface which receives notification about various
* script-execution related events such as statement execution and function
* calls.
*
* WARNING: This interface is still a work in progress and is not yet
* offically publicly available. It is likely to change in binary incompatible
* (and possibly source incompatible) ways in future versions. It is
* anticipated that at some stage the interface will be frozen and made
* available for general use.
*/
class KJS_EXPORT Debugger {
public:
/**
* Creates a new debugger
*/
Debugger();
/**
* Destroys the debugger. If the debugger is attached to any interpreters,
* it is automatically detached.
*/
virtual ~Debugger();
DebuggerImp *imp() const { return rep; }
/**
* Attaches the debugger to specified interpreter. This will cause this
* object to receive notification of events from the interpreter.
*
* If the interpreter is deleted, the debugger will automatically be
* detached.
*
* Note: only one debugger can be attached to an interpreter at a time.
* Attaching another debugger to the same interpreter will cause the
* original debugger to be detached from that interpreter.
*
* @param interp The interpreter to attach to
*
* @see detach()
*/
void attach(Interpreter *interp);
/**
* Detach the debugger from an interpreter
*
* @param interp The interpreter to detach from. If 0, the debugger will be
* detached from all interpreters to which it is attached.
*
* @see attach()
*/
void detach(Interpreter *interp);
/**
* Called to notify the debugger that some javascript source code has
* been parsed. For calls to Interpreter::evaluate(), this will be called
* with the supplied source code before any other code is parsed.
* Other situations in which this may be called include creation of a
* function using the Function() constructor, or the eval() function.
*
* The default implementation does nothing. Override this method if
* you want to process this event.
*
* @param exec The current execution state
* @param sourceId The ID of the source code (corresponds to the
* sourceId supplied in other functions such as atStatement()
* @param source The source code that was parsed
* @param errorLine The line number at which parsing encountered an
* error, or -1 if the source code was valid and parsed successfully
* @return true if execution should be continue, false if it should
* be aborted
*/
virtual bool sourceParsed(ExecState *exec, int sourceId,
const UString &source, int errorLine);
/**
* Called when all functions/programs associated with a particular
* sourceId have been deleted. After this function has been called for
* a particular sourceId, that sourceId will not be used again.
*
* The default implementation does nothing. Override this method if
* you want to process this event.
*
* @param exec The current execution state
* @param sourceId The ID of the source code (corresponds to the
* sourceId supplied in other functions such as atLine()
* @return true if execution should be continue, false if it should
* be aborted
*/
virtual bool sourceUnused(ExecState *exec, int sourceId);
/**
* Called when an exception is thrown during script execution.
*
* The default implementation does nothing. Override this method if
* you want to process this event.
*
* @param exec The current execution state
* @param value The value of the exception
* @param inTryCatch Whether or not the exception will be caught by the
* script
* @return true if execution should be continue, false if it should
* be aborted
*/
virtual bool exception(ExecState *exec, const Value &value,
bool inTryCatch);
/**
* Called when a line of the script is reached (before it is executed)
*
* The exec pointer's Context object can be inspected to determine
* the line number and sourceId of the statement.
*
* The default implementation does nothing. Override this method if
* you want to process this event.
*
* @param exec The current execution state
* @return true if execution should be continue, false if it should
* be aborted
*/
virtual bool atStatement(ExecState *exec);
/**
* Called when the interpreter enters a new execution context (stack
* frame). This can happen in three situations:
*
* <ul>
* <li>A call to Interpreter::evaluate(). This has a codeType of
* GlobalCode, and the sourceId is the id of the code passed to
* evaluate(). The lineno here is always 0 since execution starts at the
* beginning of the script.</li>
* <li>A call to the builtin eval() function. The sourceId corresponds to
* the code passed in to eval. This has a codeType of EvalCode. The
* lineno here is always 0 since execution starts at the beginning of
* the script.</li>
* <li>A function call. This only occurs for functions defined in
* ECMAScript code, whether via the normal function() { ... } syntax or
* a call to the built-in Function() constructor (anonymous functions).
* In the former case, the sourceId and lineno indicate the location at
* which the function was defined. For anonymous functions, the sourceId
* corresponds to the code passed into the Function() constructor.</li>
* </ul>
*
* enterContext() is not called for functions implemented in the native
* code, since these do not use an execution context.
*
* @param exec The current execution state (corresponding to the new stack
* frame)
*/
virtual bool enterContext(ExecState *exec);
/**
* Called when the inteprreter exits an execution context. This always
* corresponds to a previous call to enterContext()
*
* @param exec The current execution state (corresponding to the stack frame
* being exited from)
* @param completion The result of execution of the context. Can be used to
* inspect exceptions and return values
*/
virtual bool exitContext(ExecState *exec, const Completion &completion);
private:
DebuggerImp *rep;
};
}
#endif
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