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/**
* @file llexternaleditor.cpp
* @brief A convenient class to run external editor.
*
* $LicenseInfo:firstyear=2010&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* 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;
* version 2.1 of the License only.
*
* 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
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "llviewerprecompiledheaders.h"
#include "llexternaleditor.h"
#include "lltrans.h"
#include "llui.h"
#include "llprocess.h"
#include "llsdutil.h"
#include <boost/foreach.hpp>
// static
const std::string LLExternalEditor::sFilenameMarker = "%s";
// static
const std::string LLExternalEditor::sSetting = "ExternalEditor";
LLExternalEditor::EErrorCode LLExternalEditor::setCommand(const std::string& env_var, const std::string& override)
{
std::string cmd = findCommand(env_var, override);
if (cmd.empty())
{
LL_WARNS() << "Editor command is empty or not set" << LL_ENDL;
return EC_NOT_SPECIFIED;
}
string_vec_t tokens;
tokenize(tokens, cmd);
// Check executable for existence.
std::string bin_path = tokens[0];
if (!LLFile::isfile(bin_path))
{
LL_WARNS() << "Editor binary [" << bin_path << "] not found" << LL_ENDL;
return EC_BINARY_NOT_FOUND;
}
// Save command.
mProcessParams = LLProcess::Params();
mProcessParams.executable = bin_path;
for (size_t i = 1; i < tokens.size(); ++i)
{
mProcessParams.args.add(tokens[i]);
}
// Add the filename marker if missing.
if (cmd.find(sFilenameMarker) == std::string::npos)
{
mProcessParams.args.add(sFilenameMarker);
LL_INFOS() << "Adding the filename marker (" << sFilenameMarker << ")" << LL_ENDL;
}
LL_INFOS() << "Setting command [" << mProcessParams << "]" << LL_ENDL;
return EC_SUCCESS;
}
LLExternalEditor::EErrorCode LLExternalEditor::run(const std::string& file_path)
{
if (std::string(mProcessParams.executable).empty() || mProcessParams.args.empty())
{
LL_WARNS() << "Editor command not set" << LL_ENDL;
return EC_NOT_SPECIFIED;
}
// Copy params block so we can replace sFilenameMarker
LLProcess::Params params;
params.executable = mProcessParams.executable;
// Substitute the filename marker in the command with the actual passed file name.
BOOST_FOREACH(const std::string& arg, mProcessParams.args)
{
std::string fixed(arg);
LLStringUtil::replaceString(fixed, sFilenameMarker, file_path);
params.args.add(fixed);
}
// Run the editor. Prevent killing the process in destructor.
params.autokill = false;
return LLProcess::create(params) ? EC_SUCCESS : EC_FAILED_TO_RUN;
}
// static
std::string LLExternalEditor::getErrorMessage(EErrorCode code)
{
switch (code)
{
case EC_SUCCESS: return LLTrans::getString("ok");
case EC_NOT_SPECIFIED: return LLTrans::getString("ExternalEditorNotSet");
case EC_PARSE_ERROR: return LLTrans::getString("ExternalEditorCommandParseError");
case EC_BINARY_NOT_FOUND: return LLTrans::getString("ExternalEditorNotFound");
case EC_FAILED_TO_RUN: return LLTrans::getString("ExternalEditorFailedToRun");
}
return LLTrans::getString("Unknown");
}
// TODO:
// - Unit-test this with tests like LLStringUtil::getTokens() (the
// command-line overload that supports quoted tokens)
// - Unless there are significant semantic differences, eliminate this method
// and use LLStringUtil::getTokens() instead.
// static
size_t LLExternalEditor::tokenize(string_vec_t& tokens, const std::string& str)
{
tokens.clear();
// Split the argument string into separate strings for each argument
typedef boost::tokenizer< boost::char_separator<char> > tokenizer;
boost::char_separator<char> sep("", "\" ", boost::drop_empty_tokens);
tokenizer tokens_list(str, sep);
tokenizer::iterator token_iter;
BOOL inside_quotes = FALSE;
BOOL last_was_space = FALSE;
for (token_iter = tokens_list.begin(); token_iter != tokens_list.end(); ++token_iter)
{
if (!strncmp("\"",(*token_iter).c_str(),2))
{
inside_quotes = !inside_quotes;
}
else if (!strncmp(" ",(*token_iter).c_str(),2))
{
if(inside_quotes)
{
tokens.back().append(std::string(" "));
last_was_space = TRUE;
}
}
else
{
std::string to_push = *token_iter;
if (last_was_space)
{
tokens.back().append(to_push);
last_was_space = FALSE;
}
else
{
tokens.push_back(to_push);
}
}
}
return tokens.size();
}
// static
std::string LLExternalEditor::findCommand(
const std::string& env_var,
const std::string& override)
{
std::string cmd;
// Get executable path.
if (!override.empty()) // try the supplied override first
{
cmd = override;
LL_INFOS() << "Using override" << LL_ENDL;
}
else if (!LLUI::sSettingGroups["config"]->getString(sSetting).empty())
{
cmd = LLUI::sSettingGroups["config"]->getString(sSetting);
LL_INFOS() << "Using setting" << LL_ENDL;
}
else // otherwise use the path specified by the environment variable
{
char* env_var_val = getenv(env_var.c_str());
if (env_var_val)
{
cmd = env_var_val;
LL_INFOS() << "Using env var " << env_var << LL_ENDL;
}
}
LL_INFOS() << "Found command [" << cmd << "]" << LL_ENDL;
return cmd;
}
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