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/****************************************************************************
** SASM - simple IDE for NASM development
** Copyright (C) 2013 Dmitriy Manushin
** Contact: site: http://dman95.github.io/SASM/
** e-mail: Dman1095@gmail.com
**
** This file is part of SASM.
**
** SASM is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** SASM 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with SASM. If not, see <http://www.gnu.org/licenses/>.
**
** Этот файл — часть SASM.
**
** SASM - свободная программа: вы можете перераспространять ее и/или
** изменять ее на условиях Стандартной общественной лицензии GNU в том виде,
** в каком она была опубликована Фондом свободного программного обеспечения;
** либо версии 3 лицензии, либо (по вашему выбору) любой более поздней
** версии.
**
** SASM распространяется в надежде, что она будет полезной,
** но БЕЗО ВСЯКИХ ГАРАНТИЙ; даже без неявной гарантии ТОВАРНОГО ВИДА
** или ПРИГОДНОСТИ ДЛЯ ОПРЕДЕЛЕННЫХ ЦЕЛЕЙ. Подробнее см. в Стандартной
** общественной лицензии GNU.
**
** Вы должны были получить копию Стандартной общественной лицензии GNU
** вместе с этой программой. Если это не так, см.
** <http://www.gnu.org/licenses/>.)
**
****************************************************************************/
#include "codeeditor.h"
CodeEditor::CodeEditor(QWidget *parent) :
RuQPlainTextEdit(parent), debugImage(":/images/debugLine.png")
{
this->setDebugMode(false);
debugAreaWidth = 3 + debugImage.width() + 1;
lineNumberArea = new LineNumberArea(this);
connect(this, SIGNAL(blockCountChanged(int)), this, SLOT(updateLineNumberAreaWidth(int)));
connect(this, SIGNAL(updateRequest(QRect,int)), this, SLOT(updateLineNumberArea(QRect,int)));
connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(highlightCurrentLine()));
updateLineNumberAreaWidth(0);
highlightCurrentLine();
currentDebugLine = -1;
}
int CodeEditor::lineNumberAreaWidth()
{
int digits = 1;
int max = qMax(1, blockCount());
while (max >= 10) {
max /= 10;
++digits;
}
int space = fontMetrics().width(QLatin1Char('9')) * digits + debugAreaWidth;
return space;
}
void CodeEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
{
setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
}
void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
{
if (dy)
lineNumberArea->scroll(0, dy);
else
lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());
//indirectly invokes CodeEditor::lineNumberAreaPaintEvent() throw virtual LineNumberArea::paintEvent()
if (rect.contains(viewport()->rect())) //viewport - visible part of widget
updateLineNumberAreaWidth(0);
}
void CodeEditor::resizeEvent(QResizeEvent *e)
{
QPlainTextEdit::resizeEvent(e);
QRect cr = contentsRect();
lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
}
void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
{
//paint on line number area
QPainter painter(lineNumberArea);
painter.fillRect(event->rect(), QColor(240,240,240));
QTextBlock block = firstVisibleBlock();
int blockNumber = block.blockNumber();
int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
int bottom = top + (int) blockBoundingRect(block).height();
//set debugAreaWidth before drawing
debugAreaWidth = 3 + debugImage.width() + 1; //left margin + arrow width + right margin
updateLineNumberAreaWidth(0);
while (block.isValid() && top <= event->rect().bottom()) {
if (block.isVisible() && bottom >= event->rect().top()) {
QString number = QString::number(blockNumber + 1);
painter.setPen(Qt::black);
painter.drawText(0, top, lineNumberArea->width() - debugAreaWidth, fontMetrics().height(),
Qt::AlignRight, number);
if (blockNumber + 1 == currentDebugLine)
painter.drawPixmap(lineNumberArea->width() - debugAreaWidth + 3, top + fontMetrics().height() / 2 - debugImage.height() / 2,
debugImage.width(), debugImage.height(), debugImage);
}
block = block.next();
top = bottom;
bottom = top + (int) blockBoundingRect(block).height();
++blockNumber;
}
}
void CodeEditor::highlightCurrentLine()
{
if (!debugMode) {
QList<QTextEdit::ExtraSelection> extraSelections;
if (!isReadOnly()) {
QTextEdit::ExtraSelection selection;
QColor lineColor = QColor(232, 232, 255);
selection.format.setBackground(lineColor);
selection.format.setProperty(QTextFormat::FullWidthSelection, true);
selection.cursor = textCursor();
selection.cursor.clearSelection();
extraSelections.append(selection);
}
setExtraSelections(extraSelections);
}
}
void CodeEditor::highlightDebugLine(int lineNumber)
{
if (debugMode) {
QList<QTextEdit::ExtraSelection> extraSelections;
if (!isReadOnly()) {
QTextEdit::ExtraSelection selection;
QColor lineColor = QColor(235, 200, 40);
selection.format.setBackground(lineColor);
selection.format.setProperty(QTextFormat::FullWidthSelection, true);
selection.cursor = QTextCursor(this->document());
selection.cursor.movePosition(QTextCursor::NextBlock, QTextCursor::MoveAnchor, lineNumber - 1);
selection.cursor.clearSelection();
this->setTextCursor(selection.cursor); //scroll to debugging line
extraSelections.append(selection);
}
setExtraSelections(extraSelections);
}
}
void CodeEditor::updateDebugLine(int number)
{
if (number == -1)
setDebugMode(false);
else
setDebugMode(true);
currentDebugLine = number;
//create rectangle of line number area and highlight debug line throw updateRequest()
QRect rect(lineNumberArea->x(), lineNumberArea->y(), lineNumberArea->width(), lineNumberArea->height());
emit updateRequest(rect, 0);
highlightDebugLine(number);
highlightCurrentLine();
}
void CodeEditor::setDebugMode(bool mode)
{
debugMode = mode;
}
void CodeEditor::putTab()
{
QTextCursor cursor = this->textCursor();
if (cursor.selectionEnd() - cursor.selectionStart() <= 0) {
this->insertPlainText(" ");
} else {
QString selected =
cursor.selectedText().replace(QString(QChar::ParagraphSeparator),
QString(QChar::ParagraphSeparator) + QString(" "));
selected.insert(0, QString(" "));
cursor.removeSelectedText();
cursor.insertText(selected);
}
}
void CodeEditor::deleteTab()
{
QTextCursor cursor = this->textCursor();
if (cursor.selectionEnd() - cursor.selectionStart() <= 0) {
//delete 4 spaces (tab)
cursor.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor, 4);
QString selected = cursor.selectedText();
if (selected.left(4) == QString(" "))
cursor.deletePreviousChar();
} else {
QString selected =
cursor.selectedText().replace(QString(QChar::ParagraphSeparator) + QString(" "),
QString(QChar::ParagraphSeparator));
cursor.removeSelectedText();
if (selected.left(4) == QString(" "))
cursor.insertText(selected.right(selected.length() - 4));
else
cursor.insertText(selected);
}
}
void CodeEditor::keyPressEvent(QKeyEvent *e)
{
QString curString = this->textCursor().block().text();
int indentWidth = -1;
switch (e->key()) {
case (Qt::Key_Tab) :
if (e->modifiers() & Qt::ControlModifier)
deleteTab();
else
putTab();
break;
case (Qt::Key_Enter) :
case (Qt::Key_Return) :
while (curString[++indentWidth] == ' ');
QPlainTextEdit::keyPressEvent(e);
for (int i = 0; i < indentWidth; i++)
this->insertPlainText(" ");
break;
case (Qt::Key_Q) :
if ((e->modifiers() & Qt::ShiftModifier) && (e->modifiers() & Qt::ControlModifier))
this->commentSelectedCode();
else
QPlainTextEdit::keyPressEvent(e);
break;
case (Qt::Key_A) :
if ((e->modifiers() & Qt::ShiftModifier) && (e->modifiers() & Qt::ControlModifier))
this->uncommentSelectedCode();
else
QPlainTextEdit::keyPressEvent(e);
break;
default:
QPlainTextEdit::keyPressEvent(e);
}
}
CodeEditor::~CodeEditor()
{
delete lineNumberArea;
}