Bug 303808: Add a Preference page for GDB CLI consoles

In addition, a new "Preferences" Action is available for
the GDB CLI consoles so the user can easily find/adjust them.

Change-Id: I8d2756683f92ca9b42454906dd600c97e1e07cd2
Signed-off-by: Alvaro Sanchez-Leon <alvsan09@gmail.com>

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/plugin.properties

@@ -61,3 +61,6 @@ command.connect.description = Connect to selected processes
 command.connect.name = Connect
 command.connect.label = Connect
 command.connect.tooltip = Connect to process
+
+# GDB CLI Console
+console.preferences.name = Console

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/plugin.xml

@@ -524,6 +524,12 @@
             id="org.eclipse.cdt.dsf.gdb.ui.preferences.reversedebugpreferences"
             name="%reverseDebugPreferences.name">
       </page>
+      <page
+            category="org.eclipse.cdt.dsf.gdb.ui.preferences"
+            class="org.eclipse.cdt.dsf.gdb.internal.ui.preferences.GdbConsolePreferencePage"
+            id="org.eclipse.cdt.dsf.gdb.ui.preferences.console.GdbConsolePreferencePage"
+            name="%console.preferences.name">
+      </page>
    </extension>
     <extension
          point="org.eclipse.ui.console.consolePageParticipants">

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/ConsoleMessages.java

@@ -49,6 +49,8 @@ public class ConsoleMessages extends NLS {
 	public static String ConsoleAutoTerminateAction_name;
 	public static String ConsoleAutoTerminateAction_description;
 
+	public static String GdbConsolePreferences_name;
+	
 	static {
 		// initialize resource bundle
 		NLS.initializeMessages(ConsoleMessages.class.getName(), ConsoleMessages.class);

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/ConsoleMessages.properties

@@ -41,3 +41,5 @@ ConsoleSelectAllAction_description=Select All available text in the associated c
 
 ConsoleAutoTerminateAction_name=Terminate GDB when last process exits
 ConsoleAutoTerminateAction_description=Automatically terminate GDB when the last process being debugged exits
+
+GdbConsolePreferences_name=Preferences...

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbAbstractConsolePreferenceListener.java

@@ -0,0 +1,38 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Ericsson and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+package org.eclipse.cdt.dsf.gdb.internal.ui.console;
+
+import org.eclipse.cdt.dsf.gdb.IGdbDebugPreferenceConstants;
+import org.eclipse.cdt.dsf.gdb.internal.GdbPlugin;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+
+public abstract class GdbAbstractConsolePreferenceListener implements IPropertyChangeListener {
+
+	@Override
+	public void propertyChange(PropertyChangeEvent event) {
+		String property = event.getProperty();
+
+		if (property.equals(IGdbDebugPreferenceConstants.PREF_AUTO_TERMINATE_GDB)) {
+			String terminateStr = event.getNewValue().toString();
+			boolean terminate = terminateStr.equals(Boolean.FALSE.toString()) ? false : true;
+			handleAutoTerminatePref(terminate);
+		} else if (property.equals(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS)) {
+			boolean enabled = Platform.getPreferencesService().getBoolean(GdbPlugin.PLUGIN_ID, IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS, IGdbDebugPreferenceConstants.CONSOLE_INVERTED_COLORS_DEFAULT, null);
+			handleInvertColorsPref(enabled);
+		} else if (property.equals(IGdbDebugPreferenceConstants.PREF_CONSOLE_BUFFERLINES)) {
+			int bufferLines = Platform.getPreferencesService().getInt(GdbPlugin.PLUGIN_ID, IGdbDebugPreferenceConstants.PREF_CONSOLE_BUFFERLINES, IGdbDebugPreferenceConstants.CONSOLE_BUFFERLINES_DEFAULT, null);
+			handleBufferLinesPref(bufferLines);
+		}
+	}
+	
+	protected abstract void handleAutoTerminatePref(boolean enabled);
+	protected abstract void handleInvertColorsPref(boolean enabled);
+	protected abstract void handleBufferLinesPref(int bufferLines);
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbBasicCliConsole.java

@@ -37,7 +37,13 @@ import org.eclipse.ui.part.IPageBookViewPage;
  * towards GDB.  It is used whenever {@link IGDBBackend#isFullGdbConsoleSupported()}
  * returns false.
  */
-public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole, IGdbCliConsole {
+public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole {
+
+	/**
+	 * A conversion factor used to resolve number of characters from number of lines 
+	 */
+	private final static int CHARS_PER_LINE_AVG = 80;
+	private final static int HIGH_WATERMARK_OFFSET_CHARS = 8000;
 
 	private final ILaunch fLaunch;
 	private final String fLabel;
@@ -45,6 +51,24 @@ public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole, I
 	private final IOConsoleOutputStream fOutputStream;
 	private final IOConsoleOutputStream fErrorStream;
 	
+	private GdbAbstractConsolePreferenceListener fPreferenceListener = new GdbAbstractConsolePreferenceListener() {
+
+		@Override
+		protected void handleAutoTerminatePref(boolean enabled) {
+			// Nothing to do for this class
+		}
+
+		@Override
+		protected void handleInvertColorsPref(boolean enabled) {
+			setInvertedColors(enabled);
+		}
+
+		@Override
+		protected void handleBufferLinesPref(int bufferLines) {
+			setBufferLineLimit(bufferLines);
+		}
+	};
+
 	public GdbBasicCliConsole(ILaunch launch, String label, Process process) {
 		super("", null, null, false); //$NON-NLS-1$
 		fLaunch = launch;
@@ -58,8 +82,10 @@ public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole, I
         // Create a lifecycle listener to call init() and dispose()
         new GdbConsoleLifecycleListener(this);
         
+		GdbUIPlugin.getDefault().getPreferenceStore().addPropertyChangeListener(fPreferenceListener);
+
         resetName();
-        setColors();
+        setDefaults();
         
 		new InputReadJob().schedule();
 		new OutputReadJob().schedule();
@@ -77,19 +103,22 @@ public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole, I
 		} catch (IOException e) {
 		}
 
+		GdbUIPlugin.getDefault().getPreferenceStore().removePropertyChangeListener(fPreferenceListener);
+
 		super.dispose();
 	}
 	
-	private void setColors() {
+	private void setDefaults() {
-		// Set the inverted colors option based on the stored preference
 		IPreferenceStore store = GdbUIPlugin.getDefault().getPreferenceStore();
 		boolean enabled = store.getBoolean(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS);
+		int bufferLines = store.getInt(IGdbDebugPreferenceConstants.PREF_CONSOLE_BUFFERLINES);
 
 		Display.getDefault().asyncExec(() -> {
 			getInputStream().setColor(Display.getDefault().getSystemColor(SWT.COLOR_GREEN));
         	fErrorStream.setColor(Display.getDefault().getSystemColor(SWT.COLOR_RED));
 
     		setInvertedColors(enabled);
+    		setBufferLineLimit(bufferLines);
         });
 	}
 
@@ -152,8 +181,7 @@ public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole, I
 		return null;
 	}
 	
-	@Override
+	private void setInvertedColors(boolean enable) {
-	public void setInvertedColors(boolean enable) {
 		if (enable) {
 			setBackground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
 			fOutputStream.setColor(Display.getDefault().getSystemColor(SWT.COLOR_WHITE));
@@ -163,6 +191,14 @@ public class GdbBasicCliConsole extends IOConsole implements IDebuggerConsole, I
 		}
 	}
 
+	private void setBufferLineLimit(int bufferLines) {
+		int chars = bufferLines * CHARS_PER_LINE_AVG;
+		// The buffer will be allowed to grow up-to the high watermark. 
+		// When high watermark is passed, it will be trimmed-down to the low watermark.
+		// So here add an extra buffer for high watermark.
+		setWaterMarks(chars, chars + HIGH_WATERMARK_OFFSET_CHARS);
+	}
+	
     private class InputReadJob extends Job {
     	{
     		setSystem(true); 

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbBasicCliConsolePage.java

@@ -16,6 +16,7 @@ import org.eclipse.debug.ui.contexts.DebugContextEvent;
 import org.eclipse.debug.ui.contexts.IDebugContextListener;
 import org.eclipse.jface.action.IMenuManager;
 import org.eclipse.jface.action.IToolBarManager;
+import org.eclipse.jface.action.Separator;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.ui.console.IConsoleView;
 import org.eclipse.ui.internal.console.IOConsolePage;
@@ -29,6 +30,7 @@ public class GdbBasicCliConsolePage extends IOConsolePage implements IDebugConte
 	
 	private GdbConsoleInvertColorsAction fInvertColorsAction;
 	private GdbConsoleTerminateLaunchAction fTerminateLaunchAction;
+	private GdbConsoleShowPreferencesAction fShowPreferencePageAction;
 
 	public GdbBasicCliConsolePage(GdbBasicCliConsole gdbConsole, IConsoleView view) {
 		super(gdbConsole, view);
@@ -58,12 +60,15 @@ public class GdbBasicCliConsolePage extends IOConsolePage implements IDebugConte
 	protected void createActions() {
 		fInvertColorsAction = new GdbConsoleInvertColorsAction();
 		fTerminateLaunchAction = new GdbConsoleTerminateLaunchAction(fLaunch);
+		fShowPreferencePageAction = new GdbConsoleShowPreferencesAction(getSite().getShell());
 	}
 
 	@Override
 	protected void contextMenuAboutToShow(IMenuManager menuManager) {
 		menuManager.add(fTerminateLaunchAction);
 		menuManager.add(fInvertColorsAction);
+		menuManager.add(new Separator());
+		menuManager.add(fShowPreferencePageAction);
 	}
 	
 	/**

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbConsoleInvertColorsAction.java

@@ -7,9 +7,6 @@
  *******************************************************************************/
 package org.eclipse.cdt.dsf.gdb.internal.ui.console;
 
-import org.eclipse.cdt.debug.ui.CDebugUIPlugin;
-import org.eclipse.cdt.debug.ui.debuggerconsole.IDebuggerConsole;
-import org.eclipse.cdt.debug.ui.debuggerconsole.IDebuggerConsoleManager;
 import org.eclipse.cdt.dsf.gdb.IGdbDebugPreferenceConstants;
 import org.eclipse.cdt.dsf.gdb.internal.GdbPlugin;
 import org.eclipse.cdt.dsf.gdb.internal.ui.GdbUIPlugin;
@@ -38,12 +35,5 @@ public class GdbConsoleInvertColorsAction extends Action {
 			preferences.flush();
 		} catch (BackingStoreException e) {
 		}
-
-		IDebuggerConsoleManager manager = CDebugUIPlugin.getDebuggerConsoleManager();
-		for (IDebuggerConsole console : manager.getConsoles()) {
-			if (console instanceof IGdbCliConsole) {
-				((IGdbCliConsole)console).setInvertedColors(!enabled);
-			}
-		}
 	}
 }

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbConsoleShowPreferencesAction.java

@@ -0,0 +1,27 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Ericsson AB and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+package org.eclipse.cdt.dsf.gdb.internal.ui.console;
+
+import org.eclipse.jface.action.Action;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.dialogs.PreferencesUtil;
+
+public class GdbConsoleShowPreferencesAction extends Action {
+	private final static String PREF_PAGE_ID = "org.eclipse.cdt.dsf.gdb.ui.preferences.console.GdbConsolePreferencePage"; //$NON-NLS-1$
+	private final Shell fShell;
+
+	public GdbConsoleShowPreferencesAction(Shell shell) {
+		fShell = shell;
+		setText(ConsoleMessages.GdbConsolePreferences_name);
+	}
+
+	@Override
+	public void run() {
+		PreferencesUtil.createPreferenceDialogOn(fShell, PREF_PAGE_ID, new String[] { PREF_PAGE_ID }, null).open();
+	}
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbFullCliConsole.java

@@ -36,7 +36,7 @@ import org.eclipse.ui.part.IPageBookViewPage;
  * full-featured CLI interface.  This is only supported with GDB >= 7.12
  * and if IGDBBackend.isFullGdbConsoleSupported() returns true.
  */
-public class GdbFullCliConsole extends AbstractConsole implements IDebuggerConsole, IGdbCliConsole {
+public class GdbFullCliConsole extends AbstractConsole implements IDebuggerConsole {
 	private final ILaunch fLaunch;
 	private final String fLabel;
 	private final PTY fGdbPty;
@@ -203,13 +203,6 @@ public class GdbFullCliConsole extends AbstractConsole implements IDebuggerConso
 		return fConsolePage;
 	}
 
-	@Override
-	public void setInvertedColors(boolean enable) {
-		if (fConsolePage != null) {
-			fConsolePage.setInvertedColors(enable);
-		}
-	}
-
 	public IGdbTerminalControlConnector getTerminalControlConnector() {
 		return fTerminalConnector;
 	}

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/GdbFullCliConsolePage.java

@@ -26,8 +26,6 @@ import org.eclipse.jface.action.IToolBarManager;
 import org.eclipse.jface.action.MenuManager;
 import org.eclipse.jface.action.Separator;
 import org.eclipse.jface.preference.IPreferenceStore;
-import org.eclipse.jface.util.IPropertyChangeListener;
-import org.eclipse.jface.util.PropertyChangeEvent;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.layout.GridData;
@@ -67,8 +65,27 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 	private GdbConsoleSelectAllAction fSelectAllAction;
 	private GdbAutoTerminateAction fAutoTerminateAction;
 
-	private IPropertyChangeListener fConsolePropertyChangeListener;
+	private GdbConsoleShowPreferencesAction fShowPreferencePageAction;
 
+	private GdbAbstractConsolePreferenceListener fPreferenceListener = new GdbAbstractConsolePreferenceListener() {
+
+		@Override
+		protected void handleAutoTerminatePref(boolean enabled) {
+			if (fAutoTerminateAction != null) {
+				fAutoTerminateAction.setChecked(enabled);
+			}
+		}
+
+		@Override
+		protected void handleInvertColorsPref(boolean enabled) {
+			setInvertedColors(enabled);
+		}
+
+		@Override
+		protected void handleBufferLinesPref(int bufferLines) {
+			setBufferLineLimit(bufferLines);
+		}
+	};
 
 	public GdbFullCliConsolePage(GdbFullCliConsole gdbConsole, IDebuggerConsoleView view, PTY pty) {
 		fConsole = gdbConsole;
@@ -77,18 +94,7 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		fLaunch = gdbConsole.getLaunch();
 		fGdbPty = pty;
 		
-		fConsolePropertyChangeListener = new IPropertyChangeListener() {
+		GdbUIPlugin.getDefault().getPreferenceStore().addPropertyChangeListener(fPreferenceListener);
-			@Override
-			public void propertyChange(PropertyChangeEvent event) {
-				if (event.getProperty().equals(IGdbDebugPreferenceConstants.PREF_AUTO_TERMINATE_GDB) && fAutoTerminateAction != null) {
-					String terminateStr = event.getNewValue().toString();
-					boolean terminate = terminateStr.equals(Boolean.FALSE.toString()) ? false : true;
-					fAutoTerminateAction.setChecked(terminate);
-				}
-			}
-		};
-
-		GdbUIPlugin.getDefault().getPreferenceStore().addPropertyChangeListener(fConsolePropertyChangeListener);
 	}
 
 	@Override
@@ -98,8 +104,7 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 				getSite().getWorkbenchWindow()).removeDebugContextListener(this);
 		fTerminalControl.disposeTerminal();
 		fMenuManager.dispose();
-
+		GdbUIPlugin.getDefault().getPreferenceStore().removePropertyChangeListener(fPreferenceListener);
-		GdbUIPlugin.getDefault().getPreferenceStore().removePropertyChangeListener(fConsolePropertyChangeListener);
 	}
 	
 	@Override
@@ -116,8 +121,16 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		configureToolBar(getSite().getActionBars().getToolBarManager());
 	}
 
+	private void setDefaults() {
+		IPreferenceStore store = GdbUIPlugin.getDefault().getPreferenceStore();
+		setInvertedColors(store.getBoolean(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS));
+		setBufferLineLimit(store.getInt(IGdbDebugPreferenceConstants.PREF_CONSOLE_BUFFERLINES));
+	}
+
 	private void createTerminalControl() {
 		// Create the terminal control that will be used to interact with GDB
+		// Don't use common terminal preferences as GDB consoles are having their own
+		boolean useCommonPrefs = false;
 		fTerminalControl = TerminalViewControlFactory.makeControl(
 				new ITerminalListener() {
 					@Override public void setState(TerminalState state) {}
@@ -125,7 +138,7 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		        },
 				fMainComposite,
 				new ITerminalConnector[] {}, 
-				true);
+				useCommonPrefs);
 
 		fTerminalControl.setConnector(new GdbTerminalPageConnector(fGdbTerminalControlConnector, fGdbPty));
 		
@@ -133,15 +146,11 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 			fTerminalControl.setEncoding(Charset.defaultCharset().name());
 		} catch (UnsupportedEncodingException e) {
 		}
-	
 		if (fTerminalControl instanceof ITerminalControl) {
 			((ITerminalControl)fTerminalControl).setConnectOnEnterIfClosed(false);
 			((ITerminalControl)fTerminalControl).setVT100LineWrapping(true);
 		}
 
-		// Set the inverted colors option based on the stored preference
-		IPreferenceStore store = GdbUIPlugin.getDefault().getPreferenceStore();
-		setInvertedColors(store.getBoolean(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS));
 
 		// Must use syncExec because the logic within must complete before the rest
 		// of the class methods (specifically getProcess()) is called
@@ -151,6 +160,10 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 				if (fTerminalControl != null && !fTerminalControl.isDisposed()) {
 					fTerminalControl.clearTerminal();
 					fTerminalControl.connectTerminal();
+					
+					// The actual terminal widget initializes its defaults in the line above,
+					// lets override them with our application defaults right after.
+					setDefaults();
 				}
 			}
 		});
@@ -177,6 +190,7 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		fScrollLockAction = new GdbConsoleScrollLockAction(fTerminalControl);
 		fSelectAllAction = new GdbConsoleSelectAllAction(fTerminalControl);
 		fAutoTerminateAction = new GdbAutoTerminateAction();
+		fShowPreferencePageAction = new GdbConsoleShowPreferencesAction(getSite().getShell());
 	}
 
 	protected void configureToolBar(IToolBarManager mgr) {
@@ -200,6 +214,9 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		menuManager.add(fTerminateLaunchAction);
 		menuManager.add(fInvertColorsAction);
 		menuManager.add(fAutoTerminateAction);
+		menuManager.add(new Separator());
+		
+		menuManager.add(fShowPreferencePageAction);
 	}
 
 	@Override
@@ -212,6 +229,7 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		fTerminalControl.setFocus();
 	}
 	
+
 	/**
 	 * Returns the launch to which the current selection belongs.
 	 * 
@@ -236,7 +254,15 @@ public class GdbFullCliConsolePage extends Page implements IDebugContextListener
 		}
 	}
 
-	public void setInvertedColors(boolean enable) {
+	private void setInvertedColors(boolean enable) {
+		if (fTerminalControl != null) {
 			fTerminalControl.setInvertedColors(enable);
 		}
 	}
+
+	private void setBufferLineLimit(int bufferLines) {
+		if (fTerminalControl != null) {
+			fTerminalControl.setBufferLineLimit(bufferLines);
+		}
+	}
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/console/IGdbCliConsole.java

@@ -1,17 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2016 Ericsson and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
- *******************************************************************************/
-package org.eclipse.cdt.dsf.gdb.internal.ui.console;
-
-import org.eclipse.ui.console.IConsole;
-
-public interface IGdbCliConsole extends IConsole {
-	/**
-	 * Enable or disable the inverted color option of the console.
-	 */
-    void setInvertedColors(boolean enable);
-}

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/preferences/GdbConsolePreferencePage.java

@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Wind River Systems, Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * The Initial version is based on:
+ * org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/preferences/TerminalPreferencePage.java
+ *******************************************************************************/
+package org.eclipse.cdt.dsf.gdb.internal.ui.preferences;
+
+import org.eclipse.cdt.dsf.gdb.IGdbDebugPreferenceConstants;
+import org.eclipse.cdt.dsf.gdb.internal.ui.GdbUIPlugin;
+import org.eclipse.jface.preference.BooleanFieldEditor;
+import org.eclipse.jface.preference.FieldEditorPreferencePage;
+import org.eclipse.jface.preference.IntegerFieldEditor;
+import org.eclipse.ui.IWorkbench;
+import org.eclipse.ui.IWorkbenchPreferencePage;
+
+/**
+ * GDB CLI Console Preference Page.
+ * 
+ * @noextend This class is not intended to be subclassed by clients.
+ * @noinstantiate This class is not intended to be instantiated by clients.
+ * @noreference This class is not intended to be referenced by clients.
+ */
+public class GdbConsolePreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {
+	private static final int MIN_BUFFER_LINES = 16;  /* minimum of ~1000 chars */
+	// Instead of using a maximum of Integer.MAX_VALUE (which is some obscure number),
+	// let's use a well defined limit e.g. 2 billion lines, which is readable.
+	private static final int MAX_BUFFER_LINES = 2000000000;
+
+	public GdbConsolePreferencePage() {
+		super(GRID);
+	}
+
+	@Override
+	protected void createFieldEditors() {
+		setupPage();
+	}
+
+	@Override
+	public void init(IWorkbench workbench) {
+		// do nothing
+	}
+
+	private void setupPage() {
+		setupData();
+		setupEditors();
+	}
+
+	private void setupData() {
+		setPreferenceStore(GdbUIPlugin.getDefault().getPreferenceStore());
+	}
+
+	private void setupEditors() {
+		BooleanFieldEditor invertColors = new BooleanFieldEditor(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS,
+				MessagesForPreferences.GdbConsolePreferencePage_InvertColors, getFieldEditorParent());
+		IntegerFieldEditor editorBufferSize = new IntegerFieldEditor(IGdbDebugPreferenceConstants.PREF_CONSOLE_BUFFERLINES,
+				MessagesForPreferences.GdbConsolePreferencePage_BufferLines, getFieldEditorParent());
+
+		editorBufferSize.setValidRange(MIN_BUFFER_LINES, MAX_BUFFER_LINES);
+
+		addField(invertColors);
+		addField(editorBufferSize);
+	}
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/preferences/MessagesForPreferences.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2009, 2012 Ericsson and others.
+ * Copyright (c) 2009, 2016 Ericsson and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -73,6 +73,9 @@ class MessagesForPreferences extends NLS {
 	public static String ReverseDebugPreferencePage_BranchTrace;
 	public static String ReverseDebugPreferencePage_ProcessorTrace;
 
+	public static String GdbConsolePreferencePage_InvertColors;
+	public static String GdbConsolePreferencePage_BufferLines;
+	
 	static {
 		// initialize resource bundle
 		NLS.initializeMessages(MessagesForPreferences.class.getName(), MessagesForPreferences.class);

dsf-gdb/org.eclipse.cdt.dsf.gdb.ui/src/org/eclipse/cdt/dsf/gdb/internal/ui/preferences/MessagesForPreferences.properties

@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2009, 2012 Ericsson and others.
+# Copyright (c) 2009, 2016 Ericsson and others.
 # All rights reserved. This program and the accompanying materials
 # are made available under the terms of the Eclipse Public License v1.0
 # which accompanies this distribution, and is available at
@@ -61,3 +61,6 @@ ReverseDebugPreferencePage_SelectHardwareTracingMethod=Hardware technology for i
 ReverseDebugPreferencePage_GDBPreference=Automatic (let GDB choose)
 ReverseDebugPreferencePage_BranchTrace=Branch Trace Store
 ReverseDebugPreferencePage_ProcessorTrace=Intel(R) Processor Trace
+
+GdbConsolePreferencePage_InvertColors = Invert console colors
+GdbConsolePreferencePage_BufferLines = Console buffer lines:

dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/IGdbDebugPreferenceConstants.java

@@ -173,9 +173,27 @@ public interface IGdbDebugPreferenceConstants {
 	public static final String PREF_REVERSE_TRACE_METHOD_PROCESSOR_TRACE = "UseProcessorTrace"; //$NON-NLS-1$
 
 	/**
-	 * Boolean preference indicating if the GDB console should be shown using inverted colors. Default is <code>false</code>. 
+	 * Preference key controlling the coloring of GDB CLI consoles
 	 * @since 5.2
 	 */
 	public static final String PREF_CONSOLE_INVERTED_COLORS = PREFIX + "consoleInvertedColors"; //$NON-NLS-1$
-}
 
+	/**
+	 * Default preference value for the colors used by GDB CLI consoles
+	 * @since 5.2
+	 */
+	public static final Boolean CONSOLE_INVERTED_COLORS_DEFAULT = false;
+
+	/**
+	 * Preference key controlling the number of buffered lines used by GDB CLI consoles
+	 * @since 5.2
+	 */
+	public static final String PREF_CONSOLE_BUFFERLINES = PREFIX + "consoleBufferLines"; //$NON-NLS-1$
+
+	/**
+	 * Default preference value for the number of buffered lines used by GDB CLI consoles
+	 * @since 5.2
+	 */
+	public static final int CONSOLE_BUFFERLINES_DEFAULT = 1000;
+
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/internal/GdbPreferenceInitializer.java

@@ -47,6 +47,7 @@ public class GdbPreferenceInitializer extends AbstractPreferenceInitializer {
 		node.putBoolean(IGdbDebugPreferenceConstants.PREF_HIDE_RUNNING_THREADS, false);
 		node.putBoolean(IGdbDebugPreferenceConstants.PREF_AGGRESSIVE_BP_FILTER, true);
 		node.put(IGdbDebugPreferenceConstants.PREF_REVERSE_TRACE_METHOD_HARDWARE, IGdbDebugPreferenceConstants.PREF_REVERSE_TRACE_METHOD_GDB_TRACE);
-		node.putBoolean(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS, false);
+		node.putBoolean(IGdbDebugPreferenceConstants.PREF_CONSOLE_INVERTED_COLORS, IGdbDebugPreferenceConstants.CONSOLE_INVERTED_COLORS_DEFAULT);
+		node.putInt(IGdbDebugPreferenceConstants.PREF_CONSOLE_BUFFERLINES, IGdbDebugPreferenceConstants.CONSOLE_BUFFERLINES_DEFAULT);		
 	}
 }