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Copy pathPythonQtScriptingConsole.cpp
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575 lines (437 loc) · 15.2 KB
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/*
*
* Copyright (C) 2006 MeVis Research GmbH All Rights Reserved.
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: MeVis Research GmbH, Universitaetsallee 29,
* 28359 Bremen, Germany or:
*
* http://www.mevis.de
*
*/
//----------------------------------------------------------------------------------
/*!
// \file PythonQtScriptingConsole.cpp
// \author Florian Link
// \author Last changed by $Author: florian $
// \date 2006-10
*/
//----------------------------------------------------------------------------------
#include "PythonQtScriptingConsole.h"
#include <QMenu>
#include <QMouseEvent>
#include <QKeyEvent>
#include <QApplication>
#include <QTextDocumentFragment>
#include <QTextBlock>
#include <QTextCursor>
#include <QDebug>
#include <QCompleter>
#include <QStringListModel>
#include <QScrollBar>
//-----------------------------------------------------------------------------
PythonQtScriptingConsole::PythonQtScriptingConsole(QWidget* parent, const PythonQtObjectPtr& context, Qt::WindowFlags windowFlags)
: QTextEdit(parent) {
setWindowFlags(windowFlags);
_defaultTextCharacterFormat = currentCharFormat();
_context = context;
_historyPosition = 0;
_hadError = false;
_completer = new QCompleter(this);
_completer->setWidget(this);
QObject::connect(_completer, SIGNAL(activated(const QString&)),
this, SLOT(insertCompletion(const QString&)));
clear();
connect(PythonQt::self(), SIGNAL(pythonStdOut(const QString&)), this, SLOT(stdOut(const QString&)));
connect(PythonQt::self(), SIGNAL(pythonStdErr(const QString&)), this, SLOT(stdErr(const QString&)));
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::stdOut(const QString& s)
{
_stdOut += s;
int idx;
while ((idx = _stdOut.indexOf('\n'))!=-1) {
consoleMessage(_stdOut.left(idx));
std::cout << _stdOut.left(idx).toLatin1().data() << std::endl;
_stdOut = _stdOut.mid(idx+1);
}
}
void PythonQtScriptingConsole::stdErr(const QString& s)
{
_hadError = true;
_stdErr += s;
int idx;
while ((idx = _stdErr.indexOf('\n'))!=-1) {
consoleMessage(_stdErr.left(idx));
std::cerr << _stdErr.left(idx).toLatin1().data() << std::endl;
_stdErr = _stdErr.mid(idx+1);
}
}
void PythonQtScriptingConsole::flushStdOut()
{
if (!_stdOut.isEmpty()) {
stdOut("\n");
}
if (!_stdErr.isEmpty()) {
stdErr("\n");
}
}
//-----------------------------------------------------------------------------
PythonQtScriptingConsole::~PythonQtScriptingConsole() {
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::clear() {
QTextEdit::clear();
appendCommandPrompt();
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::executeLine(bool storeOnly)
{
QTextCursor textCursor = this->textCursor();
textCursor.movePosition(QTextCursor::End);
// Select the text from the command prompt until the end of the block
// and get the selected text.
textCursor.setPosition(commandPromptPosition());
textCursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
QString code = textCursor.selectedText();
// i don't know where this trailing space is coming from, blast it!
if (code.endsWith(" ")) {
code.truncate(code.length()-1);
}
if (!code.isEmpty()) {
// Update the history
_history << code;
_historyPosition = _history.count();
_currentMultiLineCode += code + "\n";
if (!storeOnly) {
executeCode(_currentMultiLineCode);
_currentMultiLineCode = "";
}
}
// Insert a new command prompt
appendCommandPrompt(storeOnly);
}
void PythonQtScriptingConsole::executeCode(const QString& code)
{
// put visible cursor to the end of the line
QTextCursor cursor = QTextEdit::textCursor();
cursor.movePosition(QTextCursor::End);
setTextCursor(cursor);
int cursorPosition = this->textCursor().position();
// evaluate the code
_stdOut = "";
_stdErr = "";
PythonQtObjectPtr p;
PyObject* dict = NULL;
if (PyModule_Check(_context)) {
dict = PyModule_GetDict(_context);
} else if (PyDict_Check(_context)) {
dict = _context;
}
if (dict) {
p.setNewRef(PyRun_String(code.toLatin1().data(), Py_single_input, dict, dict));
}
if (!p) {
PythonQt::self()->handleError();
}
flushStdOut();
bool messageInserted = (this->textCursor().position() != cursorPosition);
// If a message was inserted, then put another empty line before the command prompt
// to improve readability.
if (messageInserted) {
append(QString());
}
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::appendCommandPrompt(bool storeOnly) {
if (storeOnly) {
_commandPrompt = "...> ";
} else {
_commandPrompt = "py> ";
}
append(_commandPrompt);
QTextCursor cursor = textCursor();
cursor.movePosition(QTextCursor::End);
setTextCursor(cursor);
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::setCurrentFont(const QColor& color, bool bold) {
QTextCharFormat charFormat(_defaultTextCharacterFormat);
QFont font(charFormat.font());
font.setBold(bold);
charFormat.setFont(font);
QBrush brush(charFormat.foreground());
brush.setColor(color);
charFormat.setForeground(brush);
setCurrentCharFormat(charFormat);
}
//-----------------------------------------------------------------------------
int PythonQtScriptingConsole::commandPromptPosition() {
QTextCursor textCursor(this->textCursor());
textCursor.movePosition(QTextCursor::End);
return textCursor.block().position() + _commandPrompt.length();
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::insertCompletion(const QString& completion)
{
QTextCursor tc = textCursor();
tc.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor);
if (tc.selectedText()==".") {
tc.insertText(QString(".") + completion);
} else {
tc = textCursor();
tc.movePosition(QTextCursor::StartOfWord, QTextCursor::MoveAnchor);
tc.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
tc.insertText(completion);
setTextCursor(tc);
}
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::handleTabCompletion()
{
QTextCursor textCursor = this->textCursor();
int pos = textCursor.position();
textCursor.setPosition(commandPromptPosition());
textCursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
int startPos = textCursor.selectionStart();
int offset = pos-startPos;
QString text = textCursor.selectedText();
QString textToComplete;
int cur = offset;
while (cur--) {
QChar c = text.at(cur);
if (c.isLetterOrNumber() || c == '.' || c == '_') {
textToComplete.prepend(c);
} else {
break;
}
}
QString lookup;
QString compareText = textToComplete;
int dot = compareText.lastIndexOf('.');
if (dot!=-1) {
lookup = compareText.mid(0, dot);
compareText = compareText.mid(dot+1, offset);
}
if (!lookup.isEmpty() || !compareText.isEmpty()) {
compareText = compareText.toLower();
QStringList found;
QStringList l = PythonQt::self()->introspection(_context, lookup, PythonQt::Anything);
foreach (QString n, l) {
if (n.toLower().startsWith(compareText)) {
found << n;
}
}
if (!found.isEmpty()) {
_completer->setCompletionPrefix(compareText);
_completer->setCompletionMode(QCompleter::PopupCompletion);
_completer->setModel(new QStringListModel(found, _completer));
_completer->setCaseSensitivity(Qt::CaseInsensitive);
QTextCursor c = this->textCursor();
c.movePosition(QTextCursor::StartOfWord);
QRect cr = cursorRect(c);
cr.setWidth(_completer->popup()->sizeHintForColumn(0)
+ _completer->popup()->verticalScrollBar()->sizeHint().width());
cr.translate(0,8);
_completer->complete(cr);
} else {
_completer->popup()->hide();
}
} else {
_completer->popup()->hide();
}
}
void PythonQtScriptingConsole::keyPressEvent(QKeyEvent* event) {
if (_completer && _completer->popup()->isVisible()) {
// The following keys are forwarded by the completer to the widget
switch (event->key()) {
case Qt::Key_Return:
if (!_completer->popup()->currentIndex().isValid()) {
insertCompletion(_completer->currentCompletion());
_completer->popup()->hide();
event->accept();
}
event->ignore();
return;
break;
case Qt::Key_Enter:
case Qt::Key_Escape:
case Qt::Key_Tab:
case Qt::Key_Backtab:
event->ignore();
return; // let the completer do default behavior
default:
break;
}
}
bool eventHandled = false;
QTextCursor textCursor = this->textCursor();
int key = event->key();
switch (key) {
case Qt::Key_Left:
// Moving the cursor left is limited to the position
// of the command prompt.
if (textCursor.position() <= commandPromptPosition()) {
QApplication::beep();
eventHandled = true;
}
break;
case Qt::Key_Up:
// Display the previous command in the history
if (_historyPosition>0) {
_historyPosition--;
changeHistory();
}
eventHandled = true;
break;
case Qt::Key_Down:
// Display the next command in the history
if (_historyPosition+1<_history.count()) {
_historyPosition++;
changeHistory();
}
eventHandled = true;
break;
case Qt::Key_Return:
executeLine(event->modifiers() & Qt::ShiftModifier);
eventHandled = true;
break;
case Qt::Key_Backspace:
if (textCursor.hasSelection()) {
cut();
eventHandled = true;
} else {
// Intercept backspace key event to check if
// deleting a character is allowed. It is not
// allowed, if the user wants to delete the
// command prompt.
if (textCursor.position() <= commandPromptPosition()) {
QApplication::beep();
eventHandled = true;
}
}
break;
case Qt::Key_Delete:
cut();
eventHandled = true;
break;
default:
if (key >= Qt::Key_Space && key <= Qt::Key_division) {
if (textCursor.hasSelection() && !verifySelectionBeforeDeletion()) {
// The selection must not be deleted.
eventHandled = true;
} else {
// The key is an input character, check if the cursor is
// behind the last command prompt, else inserting the
// character is not allowed.
int commandPromptPosition = this->commandPromptPosition();
if (textCursor.position() < commandPromptPosition) {
textCursor.setPosition(commandPromptPosition);
setTextCursor(textCursor);
}
}
}
}
if (eventHandled) {
_completer->popup()->hide();
event->accept();
} else {
QTextEdit::keyPressEvent(event);
QString text = event->text();
if (!text.isEmpty()) {
handleTabCompletion();
} else {
_completer->popup()->hide();
}
eventHandled = true;
}
}
//-----------------------------------------------------------------------------
void PythonQtScriptingConsole::cut() {
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);
}
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