/** * @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; }