Qt/patches: highlight faulty lines in patch creator

rpcs3/rpcs3qt/log_frame.cpp

@@ -679,7 +679,7 @@ void log_frame::UpdateUI()
 
 	const auto font_start_tag = [](const QColor& color) -> const QString { return QStringLiteral("<font color = \"") % color.name() % QStringLiteral("\">"); };
 	const QString font_start_tag_stack = "<font color = \"" % m_color_stack.name() % "\">";
-	const QString font_end_tag = QStringLiteral("</font>");
+	static const QString font_end_tag = QStringLiteral("</font>");
 
 	static constexpr auto escaped = [](const QString& text)
 	{

rpcs3/rpcs3qt/patch_creator_dialog.cpp

@@ -10,6 +10,9 @@
 #include <QMessageBox>
 #include <QFileDialog>
 #include <QMenuBar>
+#include <QStringBuilder>
+
+#include <regex>
 
 LOG_CHANNEL(patch_log, "PAT");
 
@@ -35,6 +38,7 @@ patch_creator_dialog::patch_creator_dialog(QWidget* parent)
 {
 	ui->setupUi(this);
 	ui->patchEdit->setFont(mMonoFont);
+	ui->patchEdit->setAcceptRichText(true);
 	ui->addPatchOffsetEdit->setFont(mMonoFont);
 	ui->addPatchOffsetEdit->setClearButtonEnabled(true);
 	ui->addPatchValueEdit->setFont(mMonoFont);
@@ -374,11 +378,12 @@ bool patch_creator_dialog::can_move_instructions(QModelIndexList& selection, mov
 	return selection.last().row() < ui->instructionTable->rowCount() - 1;
 }
 
-void patch_creator_dialog::validate()
+void patch_creator_dialog::validate(const QString& patch)
 {
 	patch_engine::patch_map patches;
-	const std::string content = ui->patchEdit->toPlainText().toStdString();
-	const bool is_valid = patch_engine::load(patches, "From Patch Creator", content, true);
+	const std::string content = patch.toStdString();
+	std::stringstream messages;
+	const bool is_valid = patch_engine::load(patches, "From Patch Creator", content, true, &messages);
 
 	if (is_valid != m_valid)
 	{
@@ -400,6 +405,50 @@ void patch_creator_dialog::validate()
 		ui->validLabel->setPalette(palette);
 		m_valid = is_valid;
 	}
+
+	if (is_valid)
+	{
+		ui->patchEdit->setText(patch);
+		return;
+	}
+
+	// Search for erronous yml node locations in log message
+	static const std::regex r("(line )(\\d+)(, column )(\\d+)");
+	std::smatch sm;
+	std::set<int> faulty_lines;
+
+	for (std::string err = messages.str(); !err.empty() && std::regex_search(err, sm, r) && sm.size() == 5; err = sm.suffix())
+	{
+		if (s64 row{}; try_to_int64(&row, sm[2].str(), 0, u32{umax}))
+		{
+			faulty_lines.insert(row);
+		}
+	}
+
+	// Create html and colorize offending lines
+	const QString font_start_tag = QStringLiteral("<font color = \"") % mInvalidColor.name() % QStringLiteral("\">");;
+	static const QString font_end_tag = QStringLiteral("</font>");
+	static const QString line_break_tag = QStringLiteral("<br/>");
+
+	QStringList lines = patch.split("\n");
+	QString new_text;
+
+	for (int i = 0; i < lines.size(); i++)
+	{
+		// Escape each line and replace raw whitespace
+		const QString line = lines[i].toHtmlEscaped().replace(" ", "&nbsp;");
+
+		if (faulty_lines.empty() || faulty_lines.contains(i))
+		{
+			new_text += font_start_tag + line + font_end_tag + line_break_tag;
+		}
+		else
+		{
+			new_text += line + line_break_tag;
+		}
+	}
+
+	ui->patchEdit->setHtml(new_text);
 }
 
 void patch_creator_dialog::export_patch()
@@ -465,8 +514,7 @@ void patch_creator_dialog::generate_yml(const QString& /*text*/)
 		patch.append(QString("      - [ %0, %1, %2 ]%3\n").arg(type).arg(offset).arg(value).arg(comment.isEmpty() ? QStringLiteral("") : QString(" # %0").arg(comment)));
 	}
 
-	ui->patchEdit->setText(patch);
-	validate();
+	validate(patch);
 }
 
 bool patch_creator_dialog::eventFilter(QObject* object, QEvent* event)

rpcs3/rpcs3qt/patch_creator_dialog.h

@@ -45,7 +45,7 @@ class patch_creator_dialog : public QDialog
 
 private Q_SLOTS:
 	void show_table_menu(const QPoint& pos);
-	void validate();
+	void validate(const QString& patch);
 	void generate_yml(const QString& text = {});
 	void export_patch();