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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#include "TerminalWidget.h"
#include <QProcessEnvironment>
#include <QDebug>
#include <QApplication>
#include <QScrollBar>
TerminalWidget::TerminalWidget(QWidget *parent, QString dir) : QTextEdit(parent){
//Setup the text widget
this->setLineWrapMode(QTextEdit::WidgetWidth);
//this->setReadOnly(true); //the key event catch will do the process/widget forwarding
//this->setPlainText("WARNING: This utility is still incomplete and does not function properly yet");
//Create/open the TTY port
PROC = new TTYProcess(this);
qDebug() << "Open new TTY";
//int fd;
bool ok = PROC->startTTY( QProcessEnvironment::systemEnvironment().value("SHELL","/bin/sh") );
qDebug() << " - opened:" << ok;
this->setEnabled(PROC->isOpen());
//Connect the signals/slots
connect(PROC, SIGNAL(readyRead()), this, SLOT(UpdateText()) );
connect(PROC, SIGNAL(processClosed()), this, SLOT(ShellClosed()) );
}
TerminalWidget::~TerminalWidget(){
aboutToClose();
}
void TerminalWidget::aboutToClose(){
if(PROC->isOpen()){ PROC->closeTTY(); } //TTY PORT
}
// ==================
// PRIVATE
// ==================
void TerminalWidget::applyData(QByteArray data){
//Quick global replacement (this widget reads both as newlines)
data = data.replace("\r\n","\n");
//Iterate through the data and apply it when possible
for(int i=0; i<data.size(); i++){
if( data.at(i)=='\b' ){
//Simple cursor backward 1 (NOT backspace in this context!!)
//this->textCursor().deletePreviousChar();
this->moveCursor(QTextCursor::Left, QTextCursor::MoveAnchor);
}else if( data.at(i)=='\x1B' ){
//ANSI Control Code start
//Look for the end of the code
int end = -1;
for(int j=1; j<(data.size()-i) && end<0; j++){
if(QChar(data.at(i+j)).isLetter()){ end = j; }
}
if(end<0){ return; } //skip everything else - no end to code found
applyANSI(data.mid(i+1, end));
i+=end; //move the final loop along - already handled these bytes
}else{
//Special Check: if inserting text within a line, clear the rest of this line first
if(i==0 && this->textCursor().position() < this->document()->characterCount()-1){
applyANSI("[K");
}
//Plaintext character - just add it here
this->insertPlainText( QChar(data.at(i)) );
}
} //end loop over data
}
void TerminalWidget::applyANSI(QByteArray code){
//Note: the first byte is often the "[" character
//qDebug() << "Handle ANSI:" << code;
//CURSOR MOVEMENT
if( code.endsWith("A") ){ //Move Up
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
this->textCursor().movePosition(QTextCursor::Up, QTextCursor::MoveAnchor, num);
}else if(code.endsWith("B")){ //Move Down
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
this->textCursor().movePosition(QTextCursor::Down, QTextCursor::MoveAnchor, num);
}else if(code.endsWith("C")){ //Move Forward
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
for(int i=0; i<num; i++){ this->moveCursor(QTextCursor::Right, QTextCursor::MoveAnchor); }
//this->textCursor().movePosition(QTextCursor::Right, QTextCursor::MoveAnchor, num);
}else if(code.endsWith("D")){ //Move Back
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
for(int i=0; i<num; i++){ this->moveCursor(QTextCursor::Left, QTextCursor::MoveAnchor); }
//this->textCursor().movePosition(QTextCursor::Left, QTextCursor::MoveAnchor, num);
}else if(code.endsWith("E")){ //Move Next/down Lines (go to beginning)
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
this->textCursor().movePosition(QTextCursor::NextRow, QTextCursor::MoveAnchor, num);
}else if(code.endsWith("F")){ //Move Previous/up Lines (go to beginning)
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
this->textCursor().movePosition(QTextCursor::PreviousRow, QTextCursor::MoveAnchor, num);
}else if(code.endsWith("G")){ //Move to specific column
int num = 1;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
this->textCursor().setPosition(num);
}else if(code.endsWith("H") || code.endsWith("f") ){ //Move to specific position (row/column)
int mid = code.indexOf(";");
if(mid>0){
int numR, numC; numR = numC = 1;
if(mid >=3){ numR = code.mid(1,mid-1).toInt(); }
if(mid < code.size()-1){ numC = code.mid(mid+1,code.size()-mid-1).toInt(); }
//this->textCursor().setPosition(
qDebug() << "Set Text Position (absolute):" << "Row:" << numR << "Col:" << numC;
// TO-DO
}
// DISPLAY CLEAR CODES
}else if(code.endsWith("J")){ //ED - Erase Display
}else if(code.endsWith("K")){ //EL - Erase in Line
int num = 0;
if(code.size()>2){ num = code.mid(1, code.size()-2).toInt(); } //everything in the middle
qDebug() << "Erase Number" << num;
//Now determine what should be cleared based on code
if(num==1){
//Clear from current cursor to beginning of line
for(int i=this->textCursor().position(); i>=0; i--){
if(this->document()->characterAt(this->textCursor().position())=='\n'){ break; }
this->textCursor().deleteChar();
}
}else if(num==2){
//Clear the entire line
// rewind the starting point to the beginning of the line
int start = this->document()->find("\n", this->textCursor().position(), QTextDocument::FindBackward).position();
for(int i=start+1; i<this->document()->characterCount()+1; i++){
if(this->document()->characterAt(this->textCursor().position())=='\n'){ break; }
this->textCursor().deleteChar();
}
}else{
//Clear from current cursor to end of line
for(int i=this->textCursor().position(); i<this->document()->characterCount()+1; i++){
if(this->document()->characterAt(this->textCursor().position())=='\n'){ break; }
this->textCursor().deleteChar();
}
}
}
}
//Outgoing Data parsing
void TerminalWidget::sendKeyPress(int key){
QByteArray ba;
//Check for special keys
switch(key){
case Qt::Key_Delete:
ba.append("\x7F");
break;
case Qt::Key_Backspace:
ba.append("\x08");
break;
case Qt::Key_Left:
ba.append("\x1b[D");
break;
case Qt::Key_Right:
ba.append("\x1b[C");
break;
case Qt::Key_Up:
ba.append("\x1b[A");
break;
case Qt::Key_Down:
ba.append("\x1b[B");
break;
}
//qDebug() << "Forward Input:" << txt << ev->key() << ba;
if(!ba.isEmpty()){ PROC->writeTTY(ba); }
}
// ==================
// PRIVATE SLOTS
// ==================
void TerminalWidget::UpdateText(){
//read the data from the process
//qDebug() << "UpdateText";
if(!PROC->isOpen()){ return; }
applyData(PROC->readTTY());
//adjust the scrollbar as needed
this->verticalScrollBar()->setValue(this->verticalScrollBar()->maximum());
}
void TerminalWidget::ShellClosed(){
emit ProcessClosed(this->whatsThis());
}
// ==================
// PROTECTED
// ==================
void TerminalWidget::keyPressEvent(QKeyEvent *ev){
if(ev->text().isEmpty() || ev->text()=="\b" ){
sendKeyPress(ev->key());
}else{
QByteArray ba; ba.append(ev->text()); //avoid any byte conversions
PROC->writeTTY(ba);
}
ev->ignore();
}
void TerminalWidget::mousePressEvent(QMouseEvent *ev){
this->setFocus();
Q_UNUSED(ev);
}
void TerminalWidget::mouseDoubleClickEvent(QMouseEvent *ev){
Q_UNUSED(ev);
}
void TerminalWidget::contextMenuEvent(QContextMenuEvent *ev){
Q_UNUSED(ev);
}
void TerminalWidget::resizeEvent(QResizeEvent *ev){
if(!PROC->isOpen()){ return; }
QSize pix = ev->size(); //pixels
QSize chars;
chars.setWidth( pix.width()/this->fontMetrics().width("W") );
chars.setHeight( pix.height()/this->fontMetrics().lineSpacing() );
PROC->setTerminalSize(chars,pix);
QTextEdit::resizeEvent(ev);
}
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