439 lines
9.6 KiB
C++
439 lines
9.6 KiB
C++
/**
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* @file llpluginmessage.cpp
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* @brief LLPluginMessage encapsulates the serialization/deserialization of messages passed to and from plugins.
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*
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* @cond
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* $LicenseInfo:firstyear=2008&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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* @endcond
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*/
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#include "linden_common.h"
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#include "llpluginmessage.h"
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#include "llsdserialize.h"
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#include "u64.h"
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/**
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* Constructor.
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*/
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LLPluginMessage::LLPluginMessage()
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{
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}
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/**
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* Constructor.
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*
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* @param[in] p Existing message
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*/
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LLPluginMessage::LLPluginMessage(const LLPluginMessage &p)
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{
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mMessage = p.mMessage;
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}
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/**
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* Constructor.
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*
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* @param[in] message_class Message class
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* @param[in] message_name Message name
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*/
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LLPluginMessage::LLPluginMessage(const std::string &message_class, const std::string &message_name)
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{
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setMessage(message_class, message_name);
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}
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/**
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* Destructor.
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*/
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LLPluginMessage::~LLPluginMessage()
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{
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}
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/**
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* Reset all internal state.
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*/
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void LLPluginMessage::clear()
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{
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mMessage = LLSD::emptyMap();
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mMessage["params"] = LLSD::emptyMap();
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}
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/**
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* Sets the message class and name. Also has the side-effect of clearing any key-value pairs in the message.
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*
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* @param[in] message_class Message class
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* @param[in] message_name Message name
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*/
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void LLPluginMessage::setMessage(const std::string &message_class, const std::string &message_name)
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{
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clear();
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mMessage["class"] = message_class;
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mMessage["name"] = message_name;
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}
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/**
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* Sets a key/value pair in the message, where the value is a string.
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*
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* @param[in] key Key
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* @param[in] value String value
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*/
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void LLPluginMessage::setValue(const std::string &key, const std::string &value)
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{
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mMessage["params"][key] = value;
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}
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/**
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* Sets a key/value pair in the message, where the value is LLSD.
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*
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* @param[in] key Key
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* @param[in] value LLSD value
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*/
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void LLPluginMessage::setValueLLSD(const std::string &key, const LLSD &value)
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{
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mMessage["params"][key] = value;
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}
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/**
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* Sets a key/value pair in the message, where the value is signed 32-bit.
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*
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* @param[in] key Key
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* @param[in] value 32-bit signed value
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*/
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void LLPluginMessage::setValueS32(const std::string &key, S32 value)
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{
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mMessage["params"][key] = value;
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}
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/**
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* Sets a key/value pair in the message, where the value is unsigned 32-bit. The value is stored as a string beginning with "0x".
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*
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* @param[in] key Key
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* @param[in] value 32-bit unsigned value
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*/
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void LLPluginMessage::setValueU32(const std::string &key, U32 value)
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{
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std::stringstream temp;
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temp << "0x" << std::hex << value;
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setValue(key, temp.str());
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}
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/**
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* Sets a key/value pair in the message, where the value is a bool.
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*
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* @param[in] key Key
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* @param[in] value Boolean value
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*/
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void LLPluginMessage::setValueBoolean(const std::string &key, bool value)
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{
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mMessage["params"][key] = value;
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}
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/**
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* Sets a key/value pair in the message, where the value is a double.
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*
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* @param[in] key Key
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* @param[in] value Boolean value
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*/
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void LLPluginMessage::setValueReal(const std::string &key, F64 value)
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{
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mMessage["params"][key] = value;
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}
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/**
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* Sets a key/value pair in the message, where the value is a pointer. The pointer is stored as a string.
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*
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* @param[in] key Key
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* @param[in] value Pointer value
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*/
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void LLPluginMessage::setValuePointer(const std::string &key, void* value)
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{
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std::stringstream temp;
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// iostreams should output pointer values in hex with an initial 0x by default.
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temp << value;
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setValue(key, temp.str());
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}
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/**
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* Gets the message class.
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*
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* @return Message class
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*/
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std::string LLPluginMessage::getClass(void) const
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{
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return mMessage["class"];
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}
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/**
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* Gets the message name.
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*
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* @return Message name
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*/
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std::string LLPluginMessage::getName(void) const
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{
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return mMessage["name"];
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}
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/**
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* Returns true if the specified key exists in this message (useful for optional parameters).
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*
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* @param[in] key Key
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*
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* @return True if key exists, false otherwise.
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*/
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bool LLPluginMessage::hasValue(const std::string &key) const
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{
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bool result = false;
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if(mMessage["params"].has(key))
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{
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result = true;
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}
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return result;
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}
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/**
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* Gets the value of a key as a string. If the key does not exist, an empty string will be returned.
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*
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* @param[in] key Key
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*
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* @return String value of key if key exists, empty string if key does not exist.
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*/
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std::string LLPluginMessage::getValue(const std::string &key) const
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{
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std::string result;
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if(mMessage["params"].has(key))
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{
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result = mMessage["params"][key].asString();
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}
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return result;
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}
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/**
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* Gets the value of a key as LLSD. If the key does not exist, a null LLSD will be returned.
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*
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* @param[in] key Key
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*
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* @return LLSD value of key if key exists, null LLSD if key does not exist.
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*/
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LLSD LLPluginMessage::getValueLLSD(const std::string &key) const
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{
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LLSD result;
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if(mMessage["params"].has(key))
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{
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result = mMessage["params"][key];
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}
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return result;
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}
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/**
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* Gets the value of a key as signed 32-bit int. If the key does not exist, 0 will be returned.
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*
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* @param[in] key Key
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*
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* @return Signed 32-bit int value of key if key exists, 0 if key does not exist.
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*/
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S32 LLPluginMessage::getValueS32(const std::string &key) const
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{
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S32 result = 0;
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if(mMessage["params"].has(key))
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{
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result = mMessage["params"][key].asInteger();
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}
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return result;
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}
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/**
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* Gets the value of a key as unsigned 32-bit int. If the key does not exist, 0 will be returned.
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*
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* @param[in] key Key
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*
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* @return Unsigned 32-bit int value of key if key exists, 0 if key does not exist.
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*/
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U32 LLPluginMessage::getValueU32(const std::string &key) const
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{
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U32 result = 0;
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if(mMessage["params"].has(key))
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{
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std::string value = mMessage["params"][key].asString();
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result = (U32)strtoul(value.c_str(), NULL, 16);
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}
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return result;
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}
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/**
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* Gets the value of a key as a bool. If the key does not exist, false will be returned.
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*
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* @param[in] key Key
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*
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* @return Boolean value of key if it exists, false otherwise.
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*/
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bool LLPluginMessage::getValueBoolean(const std::string &key) const
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{
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bool result = false;
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if(mMessage["params"].has(key))
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{
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result = mMessage["params"][key].asBoolean();
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}
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return result;
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}
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/**
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* Gets the value of a key as a double. If the key does not exist, 0 will be returned.
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*
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* @param[in] key Key
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*
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* @return Value as a double if key exists, 0 otherwise.
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*/
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F64 LLPluginMessage::getValueReal(const std::string &key) const
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{
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F64 result = 0.0f;
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if(mMessage["params"].has(key))
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{
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result = mMessage["params"][key].asReal();
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}
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return result;
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}
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/**
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* Gets the value of a key as a pointer. If the key does not exist, NULL will be returned.
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*
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* @param[in] key Key
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*
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* @return Pointer value if key exists, NULL otherwise.
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*/
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void* LLPluginMessage::getValuePointer(const std::string &key) const
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{
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void* result = NULL;
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if(mMessage["params"].has(key))
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{
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std::string value = mMessage["params"][key].asString();
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result = (void*)llstrtou64(value.c_str(), NULL, 16);
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}
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return result;
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}
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/**
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* Flatten the message into a string.
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*
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* @return Message as a string.
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*/
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std::string LLPluginMessage::generate(void) const
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{
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std::ostringstream result;
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// Pretty XML may be slightly easier to deal with while debugging...
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// LLSDSerialize::toXML(mMessage, result);
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LLSDSerialize::toPrettyXML(mMessage, result);
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return result.str();
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}
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/**
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* Parse an incoming message into component parts. Clears all existing state before starting the parse.
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*
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* @return Returns -1 on failure, otherwise returns the number of key/value pairs in the incoming message.
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*/
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int LLPluginMessage::parse(const std::string &message)
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{
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// clear any previous state
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clear();
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std::istringstream input(message);
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S32 parse_result = LLSDSerialize::fromXML(mMessage, input);
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return (int)parse_result;
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}
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/**
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* Destructor
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*/
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LLPluginMessageListener::~LLPluginMessageListener()
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{
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// TODO: should listeners have a way to ensure they're removed from dispatcher lists when deleted?
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}
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/**
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* Destructor
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*/
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LLPluginMessageDispatcher::~LLPluginMessageDispatcher()
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{
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}
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/**
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* Add a message listener. TODO:DOC need more info on what uses this. when are multiple listeners needed?
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*
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* @param[in] listener Message listener
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*/
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void LLPluginMessageDispatcher::addPluginMessageListener(LLPluginMessageListener *listener)
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{
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mListeners.insert(listener);
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}
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/**
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* Remove a message listener.
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*
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* @param[in] listener Message listener
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*/
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void LLPluginMessageDispatcher::removePluginMessageListener(LLPluginMessageListener *listener)
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{
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mListeners.erase(listener);
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}
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/**
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* Distribute a message to all message listeners.
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*
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* @param[in] message Message
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*/
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void LLPluginMessageDispatcher::dispatchPluginMessage(const LLPluginMessage &message)
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{
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for (listener_set_t::iterator it = mListeners.begin();
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it != mListeners.end();
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)
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{
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LLPluginMessageListener* listener = *it;
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listener->receivePluginMessage(message);
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// In case something deleted an entry.
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it = mListeners.upper_bound(listener);
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}
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}
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