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[Lua] Editor: line numbers and syntax highlighting.
1 parent f204200 commit ed97832

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6 files changed

+359
-47
lines changed

6 files changed

+359
-47
lines changed

‎gui/qt/CEmu.pro

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@@ -288,6 +288,7 @@ HEADERS += utils.h \
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keyhistory.h \
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memoryvisualizer.h \
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basiccodeviewerwindow.h \
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luaeditor.h \
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keypad/qtkeypadbridge.h \
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keypad/keymap.h \
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keypad/keypadwidget.h \

‎gui/qt/luaeditor.cpp

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/* Inspired from a code in the Qt Examples - BSD License */
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#include <QtWidgets>
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#include "luaeditor.h"
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LuaEditor::LuaEditor(QWidget *parent) : QPlainTextEdit(parent)
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{
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highlighter = new LuaHighlighter(document());
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lineNumberArea = new LineNumberArea(this);
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connect(this, &QPlainTextEdit::blockCountChanged, this, &LuaEditor::updateLineNumberAreaWidth);
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connect(this, &QPlainTextEdit::updateRequest, this, &LuaEditor::updateLineNumberArea);
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connect(this, &QPlainTextEdit::cursorPositionChanged, this, &LuaEditor::highlightCurrentLine);
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updateLineNumberAreaWidth(0);
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highlightCurrentLine();
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}
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int LuaEditor::lineNumberAreaWidth()
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{
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int digits = 1;
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int max = qMax(1, blockCount());
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while (max >= 10) {
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max /= 10;
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++digits;
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}
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int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
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return space;
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}
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void LuaEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
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{
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setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
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}
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void LuaEditor::updateLineNumberArea(const QRect &rect, int dy)
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{
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if (dy)
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lineNumberArea->scroll(0, dy);
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else
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lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());
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if (rect.contains(viewport()->rect()))
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updateLineNumberAreaWidth(0);
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}
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void LuaEditor::resizeEvent(QResizeEvent *e)
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{
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QPlainTextEdit::resizeEvent(e);
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QRect cr = contentsRect();
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lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
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}
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void LuaEditor::highlightCurrentLine()
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{
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QList<QTextEdit::ExtraSelection> extraSelections;
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if (!isReadOnly()) {
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QTextEdit::ExtraSelection selection;
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QColor lineColor = QColor(Qt::yellow).lighter(160);
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selection.format.setBackground(lineColor);
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selection.format.setProperty(QTextFormat::FullWidthSelection, true);
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selection.cursor = textCursor();
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selection.cursor.clearSelection();
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extraSelections.append(selection);
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}
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setExtraSelections(extraSelections);
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}
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void LuaEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
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{
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QPainter painter(lineNumberArea);
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painter.fillRect(event->rect(), Qt::lightGray);
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painter.setPen(Qt::black);
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QTextBlock block = firstVisibleBlock();
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int blockNumber = block.blockNumber();
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int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
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int bottom = top + (int) blockBoundingRect(block).height();
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while (block.isValid() && top <= event->rect().bottom())
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{
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if (block.isVisible() && bottom >= event->rect().top())
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{
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QString number = QString::number(blockNumber + 1);
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painter.drawText(-2, top, lineNumberArea->width(), fontMetrics().height(), Qt::AlignRight, number);
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}
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block = block.next();
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top = bottom;
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bottom = top + (int) blockBoundingRect(block).height();
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++blockNumber;
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}
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}
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/* Highlighter */
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LuaHighlighter::LuaHighlighter(QTextDocument *parent) : QSyntaxHighlighter(parent)
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{
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HighlightingRule rule;
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keywordFormat.setForeground(Qt::darkBlue);
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keywordFormat.setFontWeight(QFont::Bold);
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QStringList keywordPatterns;
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keywordPatterns << "\\band\\b" << "\\bbreak\\b" << "\\bdo\\b" << "\\belse\\b" << "\\belseif\\b"
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<< "\\bend\\b" << "\\bfor\\b" << "\\bif\\b" << "\\bin\\b" << "\\blocal\\b"
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<< "\\bnot\\b" << "\\bor\\b" << "\\brepeat\\b" << "\\breturn\\b" << "\\bthen\\b"
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<< "\\buntil\\b" << "\\bwhile\\n";
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foreach (const QString &pattern, keywordPatterns) {
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rule.pattern = QRegExp(pattern);
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rule.format = keywordFormat;
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highlightingRules.append(rule);
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}
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builtinFormat.setForeground(Qt::darkCyan);
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builtinFormat.setFontWeight(QFont::Bold);
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QStringList builtinPatterns;
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builtinPatterns << "\\b_G\\b" << "\\b_VERSION\\b" << "\\bassert\\b" << "\\bcollectgarbage\\b"
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<< "\\bdofile\\b" << "\\berror\\b" << "\\bgetfenv\\b" << "\\bgetmetatable\\b"
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<< "\\bipairs\\b" << "\\bload\\b" << "\\bloadfile\\b" << "\\bloadstring\\b"
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<< "\\bmodule\\b" << "\\bnext\\b" << "\\bpairs\\b" << "\\bpcall\\b" << "\\bprint\\b"
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<< "\\brawequal\\b" << "\\brawget\\b" << "\\brawset\\b" << "\\brequire\\b"
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<< "\\bselect\\b" << "\\bsetfenv\\b" << "\\bsetmetatable\\b" << "\\btonumber\\b"
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<< "\\btostring\\b" << "\\btype\\b" << "\\bunpack\\b" << "\\bxpcall\\b"
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<< "\\bcoroutine\\b" << "\\bdebug\\b" << "\\bio\\b" << "\\bmath\\b" << "\\bos\\b"
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<< "\\bpackage\\b" << "\\bstring\\b" << "\\btable\\b";
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foreach (const QString &pattern, builtinPatterns) {
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rule.pattern = QRegExp(pattern);
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rule.format = builtinFormat;
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highlightingRules.append(rule);
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}
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literalFormat.setFontWeight(QFont::Bold);
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literalFormat.setForeground(Qt::darkMagenta);
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rule.pattern = QRegExp("\\b(nil|true|false)\\b");
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rule.format = literalFormat;
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highlightingRules.append(rule);
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cemuGlobalsFormat.setFontUnderline(true);
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cemuGlobalsFormat.setForeground(Qt::red);
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rule.pattern = QRegExp("\\b(cpu|devices|mem|gui|R|F)\\b");
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rule.format = cemuGlobalsFormat;
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highlightingRules.append(rule);
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numberFormat.setForeground(Qt::darkMagenta);
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rule.pattern = QRegExp("(\\b0[xX][0-9a-fA-F]+\\b)|(((\\b[0-9]+)?\\.)?\\b[0-9]+([eE][-+]?[0-9]+)?\\b)");
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rule.format = numberFormat;
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highlightingRules.append(rule);
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quotationFormat.setForeground(Qt::darkGreen);
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rule.pattern = QRegExp("(\"[^\"]*\")|('[^']*')|(\\[=*\\[.*\\]=*\\])");
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rule.format = quotationFormat;
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highlightingRules.append(rule);
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functionFormat.setForeground(Qt::blue);
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rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
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rule.format = functionFormat;
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highlightingRules.append(rule);
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singleLineCommentFormat.setForeground(Qt::gray);
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rule.pattern = QRegExp("--[^\n]*");
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rule.format = singleLineCommentFormat;
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highlightingRules.append(rule);
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multiLineCommentFormat.setForeground(Qt::gray);
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commentStartExpression = QRegExp("--\\[=*\\[");
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commentEndExpression = QRegExp("\\]=*\\]");
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}
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void LuaHighlighter::highlightBlock(const QString &text)
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{
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foreach (const HighlightingRule &rule, highlightingRules) {
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QRegExp expression(rule.pattern);
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int index = expression.indexIn(text);
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while (index >= 0) {
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int length = expression.matchedLength();
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setFormat(index, length, rule.format);
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index = expression.indexIn(text, index + length);
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}
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}
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setCurrentBlockState(0);
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int startIndex = 0;
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if (previousBlockState() != 1)
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startIndex = commentStartExpression.indexIn(text);
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while (startIndex >= 0) {
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int endIndex = commentEndExpression.indexIn(text, startIndex);
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int commentLength;
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if (endIndex == -1) {
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setCurrentBlockState(1);
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commentLength = text.length() - startIndex;
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} else {
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commentLength = endIndex - startIndex + commentEndExpression.matchedLength();
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}
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setFormat(startIndex, commentLength, multiLineCommentFormat);
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startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
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}
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}

‎gui/qt/luaeditor.h

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/* Inspired from a code in the Qt Examples - BSD License */
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#ifndef LUAEDITOR_H
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#define LUAEDITOR_H
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#include <QtWidgets/QPlainTextEdit>
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#include <QtCore/QObject>
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#include <QtGui/QSyntaxHighlighter>
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#include <QtGui/QTextCharFormat>
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QT_BEGIN_NAMESPACE
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class QPaintEvent;
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class QResizeEvent;
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class QSize;
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class QWidget;
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class QTextDocument;
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QT_END_NAMESPACE
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class LuaHighlighter : public QSyntaxHighlighter
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{
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Q_OBJECT
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public:
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LuaHighlighter(QTextDocument *parent = 0);
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protected:
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void highlightBlock(const QString &text) Q_DECL_OVERRIDE;
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private:
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struct HighlightingRule
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{
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QRegExp pattern;
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QTextCharFormat format;
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};
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QVector<HighlightingRule> highlightingRules;
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QRegExp commentStartExpression;
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QRegExp commentEndExpression;
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QTextCharFormat keywordFormat;
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QTextCharFormat numberFormat;
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QTextCharFormat builtinFormat;
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QTextCharFormat literalFormat;
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QTextCharFormat cemuGlobalsFormat;
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QTextCharFormat singleLineCommentFormat;
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QTextCharFormat multiLineCommentFormat;
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QTextCharFormat quotationFormat;
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QTextCharFormat functionFormat;
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};
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class LuaEditor : public QPlainTextEdit
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{
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Q_OBJECT
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public:
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LuaEditor(QWidget *parent = 0);
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void lineNumberAreaPaintEvent(QPaintEvent *event);
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int lineNumberAreaWidth();
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protected:
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void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;
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private slots:
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void updateLineNumberAreaWidth(int newBlockCount);
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void highlightCurrentLine();
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void updateLineNumberArea(const QRect &, int);
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private:
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QWidget *lineNumberArea;
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LuaHighlighter *highlighter;
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};
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class LineNumberArea : public QWidget
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{
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public:
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LineNumberArea(LuaEditor *editor) : QWidget(editor) {
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luaEditor = editor;
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}
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QSize sizeHint() const Q_DECL_OVERRIDE {
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return QSize(luaEditor->lineNumberAreaWidth(), 0);
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}
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protected:
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void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE {
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luaEditor->lineNumberAreaPaintEvent(event);
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}
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private:
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LuaEditor *luaEditor;
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};
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#endif

‎gui/qt/mainwindow.h

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#include "keyhistory.h"
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#include "keypad/qtkeypadbridge.h"
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#include "qhexedit/qhexedit.h"
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#include "luaeditor.h"
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#include "png.h"
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class DockWidget;
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