iframe-proxy | Sunbelt Computer Software

History

297 lines (258 loc) · 6.89 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

#include "Console.h"

#include "Interpreter.h"

#include "ColumnFormatter.h"

#include <iostream>

#include <QKeyEvent>

#include <QFont>

#include "Utils.h"

const QString Console::PROMPT = ">>> ";

const QString Console::MULTILINE_PROMPT = "... ";

const QColor Console::NORMAL_COLOR = QColor::fromRgbF( 0, 0, 0 );

const QColor Console::ERROR_COLOR = QColor::fromRgbF( 1.0, 0, 0 );

const QColor Console::OUTPUT_COLOR = QColor::fromRgbF( 0, 0, 1.0 );

Console::Console( QWidget* parent ):

QTextEdit( parent ),

m_interpreter( new Interpreter )

{

QFont font;

font.setFamily("Courier New");

setFont(font);

m_parseHelper.subscribe( this );

displayPrompt( );

}

Console::~Console( )

{

delete m_interpreter;

}

void Console::keyPressEvent( QKeyEvent* e )

{

switch ( e->key() )

{

case Qt::Key_Return:

handleReturnKeyPress( );

return;

case Qt::Key_Tab:

autocomplete( );

return;

case Qt::Key_Backspace:

if ( ! canBackspace( ) )

return;

break;

case Qt::Key_Up:

previousHistory( );

return;

case Qt::Key_Down:

nextHistory( );

return;

case Qt::Key_Left:

if ( ! canGoLeft( ) )

return;

}

QTextEdit::keyPressEvent( e );

}

void Console::handleReturnKeyPress( )

{

if ( ! cursorIsOnInputLine( ) )

{

return;

}

QString line = getLine( );

#ifndef NDEBUG

std::cout << line.toStdString( ) << "\n";

#endif

m_parseHelper.process( line.toStdString( ) );

if ( m_parseHelper.buffered( ) )

{

append("");

displayPrompt( );

}

if ( line.size( ) )

{

m_historyBuffer.push_back( line.toStdString( ) );

m_historyIt = m_historyBuffer.end();

}

moveCursorToEnd( );

}

void Console::parseEvent( const ParseMessage& message )

{

// handle invalid user input

if ( message.errorCode )

{

setTextColor( ERROR_COLOR );

append(message.message.c_str());

setTextColor( NORMAL_COLOR );

append("");

displayPrompt( );

return;

}

// interpret valid user input

int errorCode;

std::string res;

if ( message.message.size() )

res = m_interpreter->interpret( message.message, &errorCode );

if ( errorCode )

{

setTextColor( ERROR_COLOR );

}

else

{

setTextColor( OUTPUT_COLOR );

}

if ( res.size( ) )

{

append(res.c_str());

}

setTextColor( NORMAL_COLOR );

// set up the next line on the console

append("");

displayPrompt( );

}

QString Console::getLine( )

{

QTextCursor cursor = textCursor();

cursor.movePosition( QTextCursor::StartOfLine );

cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, Console::PROMPT.size( ) );

cursor.movePosition( QTextCursor::EndOfLine, QTextCursor::KeepAnchor );

QString line = cursor.selectedText( );

cursor.clearSelection( );

return line;

}

bool Console::cursorIsOnInputLine( )

{

int cursorBlock = textCursor( ).blockNumber( );

QTextCursor bottomCursor = textCursor( );

bottomCursor.movePosition( QTextCursor::End );

int bottomBlock = bottomCursor.blockNumber( );

return ( cursorBlock == bottomBlock );

}

bool Console::inputLineIsEmpty( )

{

QTextCursor bottomCursor = textCursor( );

bottomCursor.movePosition( QTextCursor::End );

int col = bottomCursor.columnNumber( );

return ( col == Console::PROMPT.size( ) );

}

bool Console::canBackspace( )

{

if ( ! cursorIsOnInputLine( ) )

{

return false;

}

if ( inputLineIsEmpty( ) )

{

return false;

}

return true;

}

bool Console::canGoLeft( )

{

if ( cursorIsOnInputLine( ) )

{

QTextCursor bottomCursor = textCursor( );

int col = bottomCursor.columnNumber( );

return (col > Console::PROMPT.size( ));

}

return true;

}

void Console::displayPrompt( )

{

QTextCursor cursor = textCursor();

cursor.movePosition( QTextCursor::End );

if ( m_parseHelper.buffered( ) )

{

cursor.insertText( Console::MULTILINE_PROMPT );

}

else

{

cursor.insertText( Console::PROMPT );

}

cursor.movePosition( QTextCursor::EndOfLine );

}

void Console::autocomplete( )

{

if ( ! cursorIsOnInputLine( ) )

return;

QString line = getLine( );

const std::list<std::string>& suggestions =

m_interpreter->suggest( line.toStdString( ) );

if (suggestions.size() == 1)

{

line = suggestions.back().c_str();

}

else

{

// try to complete to longest common prefix

std::string prefix =

LongestCommonPrefix(suggestions.begin(), suggestions.end());

if (prefix.size() > line.size())

{

line = prefix.c_str();

}

else

{

ColumnFormatter fmt;

fmt.setItems(suggestions.begin(), suggestions.end());

fmt.format(width() / 10);

setTextColor( OUTPUT_COLOR );

const std::list<std::string>& formatted = fmt.formattedOutput();

for (std::list<std::string>::const_iterator it = formatted.begin();

it != formatted.end(); ++it)

{

append(it->c_str());

}

std::cout << width() << "\n";

setTextColor( NORMAL_COLOR );

}

// set up the next line on the console

append("");

displayPrompt( );

moveCursorToEnd( );

cursor.insertText( line );

moveCursorToEnd( );

}

void Console::previousHistory( )

{

if ( ! cursorIsOnInputLine( ) )

return;

if ( ! m_historyBuffer.size( ) )

return;

QTextCursor cursor = textCursor();

cursor.movePosition( QTextCursor::StartOfLine );

cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, Console::PROMPT.size( ) );

cursor.movePosition( QTextCursor::EndOfLine, QTextCursor::KeepAnchor );

cursor.removeSelectedText( );

if ( m_historyIt != m_historyBuffer.begin( ) )

{

--m_historyIt;

}

cursor.insertText( m_historyIt->c_str() );

}

void Console::nextHistory( )

{

if ( ! cursorIsOnInputLine( ) )

return;

if ( ! m_historyBuffer.size( ) )

return;

if ( m_historyIt == m_historyBuffer.end( ) )

{

return;

}

QTextCursor cursor = textCursor();

cursor.movePosition( QTextCursor::StartOfLine );

cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, Console::PROMPT.size( ) );

cursor.movePosition( QTextCursor::EndOfLine, QTextCursor::KeepAnchor );

cursor.removeSelectedText( );

++m_historyIt;

if ( m_historyIt == m_historyBuffer.end( ) )

{

return;

}

cursor.insertText( m_historyIt->c_str() );

}

void Console::moveCursorToEnd( )

{

QTextCursor cursor = textCursor();

cursor.movePosition( QTextCursor::End );

setTextCursor( cursor );

}

Sunbelt Computer Software

PL/B Language Development and Support

Navigation Menu

Sunbelt Computer Software

PL/B Language Development and Support

FilesExpand file tree

Console.cpp

Latest commit

History

Console.cpp

File metadata and controls