GH-1008 implement log window max line count

Defaults to 100k lines

application/MultiMC.cpp

@@ -454,6 +454,8 @@ void MultiMC::initGlobalSettings(bool test_mode)
 		m_settings->registerSetting("ConsoleFont", defaultMonospace);
 	}
 	m_settings->registerSetting("ConsoleFontSize", defaultSize);
+	m_settings->registerSetting("ConsoleMaxLines", 100000);
+	m_settings->registerSetting("ConsoleOverflowStop", true);
 
 	FTBPlugin::initialize(m_settings);
 

application/pages/LogPage.cpp

@@ -8,6 +8,7 @@
 #include <QShortcut>
 
 #include "BaseProcess.h"
+#include <settings/Setting.h>
 #include "GuiUtil.h"
 
 LogPage::LogPage(BaseProcess *proc, QWidget *parent)
@@ -29,6 +30,18 @@ LogPage::LogPage(BaseProcess *proc, QWidget *parent)
 	}
 	defaultFormat->setFont(QFont(fontFamily, fontSize));
 
+	// ensure we don't eat all the RAM
+	auto lineSetting = MMC->settings()->getSetting("ConsoleMaxLines");
+	int maxLines = lineSetting->get().toInt(&conversionOk);
+	if(!conversionOk)
+	{
+		maxLines = lineSetting->defValue().toInt();
+		qWarning() << "ConsoleMaxLines has nonsensical value, defaulting to" << maxLines;
+	}
+	ui->text->setMaximumBlockCount(maxLines);
+
+	m_stopOnOverflow = MMC->settings()->get("ConsoleOverflowStop").toBool();
+
 	auto findShortcut = new QShortcut(QKeySequence(QKeySequence::Find), this);
 	connect(findShortcut, SIGNAL(activated()), SLOT(findActivated()));
 	auto findNextShortcut = new QShortcut(QKeySequence(QKeySequence::FindNext), this);
@@ -126,6 +139,11 @@ void LogPage::findPreviousActivated()
 	}
 }
 
+void LogPage::setParentContainer(BasePageContainer * container)
+{
+	m_parentContainer = container;
+}
+
 void LogPage::write(QString data, MessageLevel::Enum mode)
 {
 	if (!m_write_active)
@@ -135,6 +153,26 @@ void LogPage::write(QString data, MessageLevel::Enum mode)
 			return;
 		}
 	}
+	if(m_stopOnOverflow && m_write_active)
+	{
+		if(mode != MessageLevel::PrePost && mode != MessageLevel::MultiMC)
+		{
+			if(ui->text->blockCount() >= ui->text->maximumBlockCount())
+			{
+				m_write_active = false;
+				data = tr("MultiMC stopped watching the game log because the log length surpassed %1 lines.\n"
+					"You may have to fix your mods because the game is still loggging to files and"
+						" likely wasting harddrive space at an alarming rate!")
+							.arg(ui->text->maximumBlockCount());
+				mode = MessageLevel::Fatal;
+				ui->trackLogCheckbox->setCheckState(Qt::Unchecked);
+				if(!isVisible())
+				{
+					m_parentContainer->selectPage(id());
+				}
+			}
+		}
+	}
 
 	// save the cursor so it can be restored.
 	auto savedCursor = ui->text->cursor();

application/pages/LogPage.h

@@ -53,6 +53,7 @@ public:
 		return "Minecraft-Logs";
 	}
 	virtual bool shouldDisplay() const;
+	virtual void setParentContainer(BasePageContainer *);
 
 private slots:
 	/**
@@ -81,6 +82,8 @@ private:
 	bool m_scroll_active = true;
 	int m_saved_offset = 0;
 	bool m_write_active = true;
+	bool m_stopOnOverflow = true;
 
 	QTextCharFormat * defaultFormat;
+	BasePageContainer * m_parentContainer;
 };

application/pages/global/MultiMCPage.cpp

@@ -299,6 +299,8 @@ void MultiMCPage::applySettings()
 	QString consoleFontFamily = ui->consoleFont->currentFont().family();
 	s->set("ConsoleFont", consoleFontFamily);
 	s->set("ConsoleFontSize", ui->fontSizeBox->value());
+	s->set("ConsoleMaxLines", ui->lineLimitSpinBox->value());
+	s->set("ConsoleOverflowStop", ui->checkStopLogging->checkState() != Qt::Unchecked);
 
 	// FTB
 	s->set("TrackFTBInstances", ui->trackFtbBox->isChecked());
@@ -388,6 +390,8 @@ void MultiMCPage::loadSettings()
 	}
 	ui->fontSizeBox->setValue(fontSize);
 	refreshFontPreview();
+	ui->lineLimitSpinBox->setValue(s->get("ConsoleMaxLines").toInt());
+	ui->checkStopLogging->setChecked(s->get("ConsoleOverflowStop").toBool());
 
 	// FTB
 	ui->trackFtbBox->setChecked(s->get("TrackFTBInstances").toBool());

application/pages/global/MultiMCPage.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>487</width>
-    <height>519</height>
+    <height>557</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -433,6 +433,47 @@
          </layout>
         </widget>
        </item>
+       <item>
+        <widget class="QGroupBox" name="groupBox_4">
+         <property name="title">
+          <string>History limit</string>
+         </property>
+         <layout class="QGridLayout" name="gridLayout_3">
+          <item row="1" column="0">
+           <widget class="QCheckBox" name="checkStopLogging">
+            <property name="text">
+             <string>Stop logging when log overflows</string>
+            </property>
+           </widget>
+          </item>
+          <item row="0" column="0">
+           <widget class="QSpinBox" name="lineLimitSpinBox">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <property name="suffix">
+             <string> lines</string>
+            </property>
+            <property name="minimum">
+             <number>10000</number>
+            </property>
+            <property name="maximum">
+             <number>1000000</number>
+            </property>
+            <property name="singleStep">
+             <number>10000</number>
+            </property>
+            <property name="value">
+             <number>100000</number>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </widget>
+       </item>
        <item>
         <widget class="QGroupBox" name="themeBox_2">
          <property name="sizePolicy">
@@ -520,6 +561,8 @@
   <tabstop>themeComboBox</tabstop>
   <tabstop>showConsoleCheck</tabstop>
   <tabstop>autoCloseConsoleCheck</tabstop>
+  <tabstop>lineLimitSpinBox</tabstop>
+  <tabstop>checkStopLogging</tabstop>
   <tabstop>consoleFont</tabstop>
   <tabstop>fontSizeBox</tabstop>
   <tabstop>fontPreview</tabstop>