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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 "llui.h"
// static
const std::string LLExternalEditor::sFilenameMarker = "%s";
// static
const std::string LLExternalEditor::sSetting = "ExternalEditor";
bool LLExternalEditor::setCommand(const std::string& env_var, const std::string& override)
{
std::string cmd = findCommand(env_var, override);
if (cmd.empty())
{
llwarns << "Empty editor command" << llendl;
return false;
}
// Add the filename marker if missing.
if (cmd.find(sFilenameMarker) == std::string::npos)
{
cmd += " \"" + sFilenameMarker + "\"";
llinfos << "Adding the filename marker (" << sFilenameMarker << ")" << llendl;
}
string_vec_t tokens;
if (tokenize(tokens, cmd) < 2) // 2 = bin + at least one arg (%s)
{
llwarns << "Error parsing editor command" << llendl;
return false;
}
// Check executable for existence.
std::string bin_path = tokens[0];
if (!LLFile::isfile(bin_path))
{
llwarns << "Editor binary [" << bin_path << "] not found" << llendl;
return false;
}
// Save command.
mProcess.setExecutable(bin_path);
mArgs.clear();
for (size_t i = 1; i < tokens.size(); ++i)
{
if (i > 1) mArgs += " ";
mArgs += "\"" + tokens[i] + "\"";
}
llinfos << "Setting command [" << bin_path << " " << mArgs << "]" << llendl;
return true;
}
bool LLExternalEditor::run(const std::string& file_path)
{
std::string args = mArgs;
if (mProcess.getExecutable().empty() || args.empty())
{
llwarns << "Editor command not set" << llendl;
return false;
}
// Substitute the filename marker in the command with the actual passed file name.
LLStringUtil::replaceString(args, sFilenameMarker, file_path);
// Split command into separate tokens.
string_vec_t tokens;
tokenize(tokens, args);
// Set process arguments taken from the command.
mProcess.clearArguments();
for (string_vec_t::const_iterator arg_it = tokens.begin(); arg_it != tokens.end(); ++arg_it)
{
mProcess.addArgument(*arg_it);
}
// Run the editor.
llinfos << "Running editor command [" << mProcess.getExecutable() + " " + args << "]" << llendl;
int result = mProcess.launch();
if (result == 0)
{
// Prevent killing the process in destructor (will add it to the zombies list).
mProcess.orphan();
}
return result == 0;
}
// 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;
llinfos << "Using override" << llendl;
}
else if (!LLUI::sSettingGroups["config"]->getString(sSetting).empty())
{
cmd = LLUI::sSettingGroups["config"]->getString(sSetting);
llinfos << "Using setting" << llendl;
}
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;
llinfos << "Using env var " << env_var << llendl;
}
}
llinfos << "Found command [" << cmd << "]" << llendl;
return cmd;
}
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