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/*
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*
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* Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
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* 28359 Bremen, Germany or:
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*
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* http://www.mevis.de
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*
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*/
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//----------------------------------------------------------------------------------
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/*!
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// \file PythonQtScriptingConsole.cpp
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// \author Florian Link
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// \author Last changed by $Author: florian $
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// \date 2006-10
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*/
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//----------------------------------------------------------------------------------
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#include "PythonQtScriptingConsole.h"
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#include <QMenu>
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#include <QMouseEvent>
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#include <QKeyEvent>
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#include <QApplication>
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#include <QTextDocumentFragment>
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#include <QTextBlock>
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#include <QTextCursor>
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#include <QDebug>
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#include <QCompleter>
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#include <QStringListModel>
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#include <QScrollBar>
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#include <QAbstractItemView>
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//-----------------------------------------------------------------------------
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PythonQtScriptingConsole::PythonQtScriptingConsole(QWidget* parent, const PythonQtObjectPtr& context, Qt::WindowFlags windowFlags)
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: QTextEdit(parent) {
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setWindowFlags(windowFlags);
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_defaultTextCharacterFormat = currentCharFormat();
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_context = context;
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_historyPosition = 0;
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_hadError = false;
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_completer = new QCompleter(this);
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_completer->setWidget(this);
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QObject::connect(_completer, SIGNAL(activated(const QString&)),
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this, SLOT(insertCompletion(const QString&)));
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clear();
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connect(PythonQt::self(), SIGNAL(pythonStdOut(const QString&)), this, SLOT(stdOut(const QString&)));
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connect(PythonQt::self(), SIGNAL(pythonStdErr(const QString&)), this, SLOT(stdErr(const QString&)));
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::stdOut(const QString& s)
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{
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_stdOut += s;
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int idx;
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while ((idx = _stdOut.indexOf('\n'))!=-1) {
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consoleMessage(_stdOut.left(idx));
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std::cout << _stdOut.left(idx).toLatin1().data() << std::endl;
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_stdOut = _stdOut.mid(idx+1);
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}
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}
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void PythonQtScriptingConsole::stdErr(const QString& s)
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{
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_hadError = true;
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_stdErr += s;
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int idx;
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while ((idx = _stdErr.indexOf('\n'))!=-1) {
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consoleMessage(_stdErr.left(idx));
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std::cerr << _stdErr.left(idx).toLatin1().data() << std::endl;
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_stdErr = _stdErr.mid(idx+1);
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}
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}
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void PythonQtScriptingConsole::flushStdOut()
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{
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if (!_stdOut.isEmpty()) {
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stdOut("\n");
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}
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if (!_stdErr.isEmpty()) {
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stdErr("\n");
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}
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}
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//-----------------------------------------------------------------------------
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PythonQtScriptingConsole::~PythonQtScriptingConsole() {
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::clear() {
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QTextEdit::clear();
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appendCommandPrompt();
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::executeLine(bool storeOnly)
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{
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QTextCursor textCursor = this->textCursor();
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textCursor.movePosition(QTextCursor::End);
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// Select the text from the command prompt until the end of the block
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// and get the selected text.
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textCursor.setPosition(commandPromptPosition());
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textCursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
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QString code = textCursor.selectedText();
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// i don't know where this trailing space is coming from, blast it!
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if (code.endsWith(" ")) {
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code.truncate(code.length()-1);
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}
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if (!code.isEmpty()) {
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// Update the history
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_history << code;
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_historyPosition = _history.count();
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_currentMultiLineCode += code + "\n";
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if (!storeOnly) {
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executeCode(_currentMultiLineCode);
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_currentMultiLineCode = "";
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}
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}
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// Insert a new command prompt
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appendCommandPrompt(storeOnly);
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}
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void PythonQtScriptingConsole::executeCode(const QString& code)
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{
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// put visible cursor to the end of the line
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QTextCursor cursor = QTextEdit::textCursor();
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cursor.movePosition(QTextCursor::End);
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setTextCursor(cursor);
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int cursorPosition = this->textCursor().position();
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// evaluate the code
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_stdOut = "";
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_stdErr = "";
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PythonQtObjectPtr p;
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PyObject* dict = NULL;
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if (PyModule_Check(_context)) {
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dict = PyModule_GetDict(_context);
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} else if (PyDict_Check(_context)) {
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dict = _context;
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}
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if (dict) {
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p.setNewRef(PyRun_String(code.toLatin1().data(), Py_single_input, dict, dict));
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}
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if (!p) {
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PythonQt::self()->handleError();
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}
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flushStdOut();
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bool messageInserted = (this->textCursor().position() != cursorPosition);
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// If a message was inserted, then put another empty line before the command prompt
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// to improve readability.
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if (messageInserted) {
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append(QString());
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}
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::appendCommandPrompt(bool storeOnly) {
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if (storeOnly) {
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_commandPrompt = "...> ";
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} else {
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_commandPrompt = "py> ";
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}
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append(_commandPrompt);
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QTextCursor cursor = textCursor();
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cursor.movePosition(QTextCursor::End);
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setTextCursor(cursor);
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::setCurrentFont(const QColor& color, bool bold) {
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QTextCharFormat charFormat(_defaultTextCharacterFormat);
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QFont font(charFormat.font());
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font.setBold(bold);
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charFormat.setFont(font);
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QBrush brush(charFormat.foreground());
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brush.setColor(color);
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charFormat.setForeground(brush);
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setCurrentCharFormat(charFormat);
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}
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//-----------------------------------------------------------------------------
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int PythonQtScriptingConsole::commandPromptPosition() {
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QTextCursor textCursor(this->textCursor());
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textCursor.movePosition(QTextCursor::End);
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return textCursor.block().position() + _commandPrompt.length();
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::insertCompletion(const QString& completion)
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{
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QTextCursor tc = textCursor();
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tc.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor);
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if (tc.selectedText()==".") {
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tc.insertText(QString(".") + completion);
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} else {
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tc = textCursor();
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tc.movePosition(QTextCursor::StartOfWord, QTextCursor::MoveAnchor);
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tc.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
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tc.insertText(completion);
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setTextCursor(tc);
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}
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}
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//-----------------------------------------------------------------------------
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void PythonQtScriptingConsole::handleTabCompletion()
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{
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QTextCursor textCursor = this->textCursor();
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int pos = textCursor.position();
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textCursor.setPosition(commandPromptPosition());
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textCursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
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int startPos = textCursor.selectionStart();
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int offset = pos-startPos;
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QString text = textCursor.selectedText();
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QString textToComplete;
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int cur = offset;
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while (cur--) {
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QChar c = text.at(cur);
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if (c.isLetterOrNumber() || c == '.' || c == '_') {
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textToComplete.prepend(c);
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} else {
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break;
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}
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}
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QString lookup;
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QString compareText = textToComplete;
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int dot = compareText.lastIndexOf('.');
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if (dot!=-1) {
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lookup = compareText.mid(0, dot);
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compareText = compareText.mid(dot+1, offset);
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}
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if (!lookup.isEmpty() || !compareText.isEmpty()) {
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compareText = compareText.toLower();
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QStringList found;
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QStringList l = PythonQt::self()->introspection(_context, lookup, PythonQt::Anything);
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Q_FOREACH (QString n, l) {
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if (n.toLower().startsWith(compareText)) {
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found << n;
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}
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}
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if (!found.isEmpty()) {
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_completer->setCompletionPrefix(compareText);
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_completer->setCompletionMode(QCompleter::PopupCompletion);
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_completer->setModel(new QStringListModel(found, _completer));
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_completer->setCaseSensitivity(Qt::CaseInsensitive);
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QTextCursor c = this->textCursor();
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c.movePosition(QTextCursor::StartOfWord);
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QRect cr = cursorRect(c);
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cr.setWidth(_completer->popup()->sizeHintForColumn(0)
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+ _completer->popup()->verticalScrollBar()->sizeHint().width());
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cr.translate(0,8);
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_completer->complete(cr);
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} else {
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_completer->popup()->hide();
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}
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} else {
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_completer->popup()->hide();
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}
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}
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void PythonQtScriptingConsole::keyPressEvent(QKeyEvent* event) {
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if (_completer && _completer->popup()->isVisible()) {
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// The following keys are forwarded by the completer to the widget
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switch (event->key()) {
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case Qt::Key_Return:
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if (!_completer->popup()->currentIndex().isValid()) {
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insertCompletion(_completer->currentCompletion());
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_completer->popup()->hide();
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event->accept();
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}
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event->ignore();
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return;
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break;
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case Qt::Key_Enter:
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case Qt::Key_Escape:
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case Qt::Key_Tab:
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case Qt::Key_Backtab:
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event->ignore();
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return; // let the completer do default behavior
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default:
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break;
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}
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}
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bool eventHandled = false;
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QTextCursor textCursor = this->textCursor();
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int key = event->key();
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switch (key) {
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case Qt::Key_Left:
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// Moving the cursor left is limited to the position
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// of the command prompt.
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if (textCursor.position() <= commandPromptPosition()) {
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QApplication::beep();
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eventHandled = true;
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}
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break;
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case Qt::Key_Up:
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// Display the previous command in the history
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if (_historyPosition>0) {
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_historyPosition--;
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changeHistory();
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}
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eventHandled = true;
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break;
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case Qt::Key_Down:
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// Display the next command in the history
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if (_historyPosition+1<_history.count()) {
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_historyPosition++;
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changeHistory();
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}
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eventHandled = true;
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break;
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case Qt::Key_Return:
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executeLine(event->modifiers() & Qt::ShiftModifier);
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eventHandled = true;
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break;
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case Qt::Key_Backspace:
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if (textCursor.hasSelection()) {
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cut();
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eventHandled = true;
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} else {
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// Intercept backspace key event to check if
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// deleting a character is allowed. It is not
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// allowed, if the user wants to delete the
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// command prompt.
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if (textCursor.position() <= commandPromptPosition()) {
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QApplication::beep();
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eventHandled = true;
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}
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}
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break;
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case Qt::Key_Delete:
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cut();
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eventHandled = true;
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break;
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default:
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|
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if (key >= Qt::Key_Space && key <= Qt::Key_division) {
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if (textCursor.hasSelection() && !verifySelectionBeforeDeletion()) {
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// The selection must not be deleted.
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eventHandled = true;
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} else {
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|
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// The key is an input character, check if the cursor is
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|
// behind the last command prompt, else inserting the
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|
// character is not allowed.
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|
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int commandPromptPosition = this->commandPromptPosition();
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|
if (textCursor.position() < commandPromptPosition) {
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|
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textCursor.setPosition(commandPromptPosition);
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setTextCursor(textCursor);
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}
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|
}
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}
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|
}
|
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|
|
if (eventHandled) {
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|
_completer->popup()->hide();
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event->accept();
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} else {
|
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|
|
QTextEdit::keyPressEvent(event);
|
|
|
QString text = event->text();
|
|
|
if (!text.isEmpty()) {
|
|
|
handleTabCompletion();
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|
} else {
|
|
|
_completer->popup()->hide();
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|
|
}
|
|
|
eventHandled = true;
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}
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|
}
|
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|
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|
|
//-----------------------------------------------------------------------------
|
|
|
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|
|
void PythonQtScriptingConsole::cut() {
|
|
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|
|
bool deletionAllowed = verifySelectionBeforeDeletion();
|
|
|
if (deletionAllowed) {
|
|
|
QTextEdit::cut();
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
|
|
bool PythonQtScriptingConsole::verifySelectionBeforeDeletion() {
|
|
|
|
|
|
bool deletionAllowed = true;
|
|
|
|
|
|
|
|
|
QTextCursor textCursor = this->textCursor();
|
|
|
|
|
|
int commandPromptPosition = this->commandPromptPosition();
|
|
|
int selectionStart = textCursor.selectionStart();
|
|
|
int selectionEnd = textCursor.selectionEnd();
|
|
|
|
|
|
if (textCursor.hasSelection()) {
|
|
|
|
|
|
// Selected text may only be deleted after the last command prompt.
|
|
|
// If the selection is partly after the command prompt set the selection
|
|
|
// to the part and deletion is allowed. If the selection occurs before the
|
|
|
// last command prompt, then deletion is not allowed.
|
|
|
|
|
|
if (selectionStart < commandPromptPosition ||
|
|
|
selectionEnd < commandPromptPosition) {
|
|
|
|
|
|
// Assure selectionEnd is bigger than selection start
|
|
|
if (selectionStart > selectionEnd) {
|
|
|
int tmp = selectionEnd;
|
|
|
selectionEnd = selectionStart;
|
|
|
selectionStart = tmp;
|
|
|
}
|
|
|
|
|
|
if (selectionEnd < commandPromptPosition) {
|
|
|
|
|
|
// Selection is completely before command prompt,
|
|
|
// so deletion is not allowed.
|
|
|
QApplication::beep();
|
|
|
deletionAllowed = false;
|
|
|
|
|
|
} else {
|
|
|
|
|
|
// The selectionEnd is after the command prompt, so set
|
|
|
// the selection start to the commandPromptPosition.
|
|
|
selectionStart = commandPromptPosition;
|
|
|
textCursor.setPosition(selectionStart);
|
|
|
textCursor.setPosition(selectionStart, QTextCursor::KeepAnchor);
|
|
|
setTextCursor(textCursor);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
} else { // if (hasSelectedText())
|
|
|
|
|
|
// When there is no selected text, deletion is not allowed before the
|
|
|
// command prompt.
|
|
|
if (textCursor.position() < commandPromptPosition) {
|
|
|
|
|
|
QApplication::beep();
|
|
|
deletionAllowed = false;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return deletionAllowed;
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
|
|
void PythonQtScriptingConsole::changeHistory() {
|
|
|
|
|
|
// Select the text after the last command prompt ...
|
|
|
QTextCursor textCursor = this->textCursor();
|
|
|
textCursor.movePosition(QTextCursor::End);
|
|
|
textCursor.setPosition(commandPromptPosition(), QTextCursor::KeepAnchor);
|
|
|
|
|
|
// ... and replace it with the history text.
|
|
|
textCursor.insertText(_history.value(_historyPosition));
|
|
|
|
|
|
textCursor.movePosition(QTextCursor::End);
|
|
|
setTextCursor(textCursor);
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
|
|
void PythonQtScriptingConsole::consoleMessage(const QString & message) {
|
|
|
|
|
|
append(QString());
|
|
|
insertPlainText(message);
|
|
|
|
|
|
// Reset all font modifications done by the html string
|
|
|
setCurrentCharFormat(_defaultTextCharacterFormat);
|
|
|
}
|
|
|
|
