mirror of https://gitee.com/bigwinds/arangodb
161 lines
4.7 KiB
C++
161 lines
4.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief implementation of the base class ShellImplementation
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014-2015 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2014-2015, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "ShellImplementation.h"
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#include <iostream>
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#include "Basics/StringUtils.h"
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#include "Utilities/Completer.h"
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using namespace std;
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using namespace arangodb;
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using namespace triagens::basics;
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// -----------------------------------------------------------------------------
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// --SECTION-- class ShellImplementation
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief constructor
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////////////////////////////////////////////////////////////////////////////////
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ShellImplementation::ShellImplementation (string const& history,
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Completer* completer)
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: _current(),
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_historyFilename(history),
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_state(STATE_NONE),
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_completer(completer) {
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destructor
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////////////////////////////////////////////////////////////////////////////////
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ShellImplementation::~ShellImplementation () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief line editor prompt
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////////////////////////////////////////////////////////////////////////////////
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string ShellImplementation::prompt (const string& prompt,
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const string& plain,
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bool& eof) {
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size_t lineno = 0;
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string dotdot = "...> ";
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string p = prompt;
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string sep = "";
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string line;
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eof = false;
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while (true) {
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// calling concrete implmentation of the shell
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line = getLine(p, eof);
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p = dotdot;
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if (eof) {
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// give up, if the user pressed control-D on the top-most level
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if (_current.empty()) {
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return "";
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}
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// otherwise clear current content
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_current.clear();
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eof = false;
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break;
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}
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_current += sep;
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sep = "\n";
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++lineno;
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// remove any prompt at the beginning of the line
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size_t pos = string::npos;
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if (StringUtils::isPrefix(line, plain)) {
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pos = line.find('>');
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}
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else if (StringUtils::isPrefix(line, "...")) {
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pos = line.find('>');
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}
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if (pos != string::npos) {
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pos = line.find_first_not_of(" \t", pos + 1);
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if (pos != string::npos) {
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line = line.substr(pos);
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}
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else {
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line.clear();
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}
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}
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// extend line and check
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_current += line;
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// stop if line is complete
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bool ok = _completer->isComplete(_current, lineno);
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if (ok) {
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break;
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}
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}
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// clear current line
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line = _current;
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_current.clear();
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return line;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief handle a signal
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////////////////////////////////////////////////////////////////////////////////
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void ShellImplementation::signal () {
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// do nothing special
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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