eclipse plugin: Implement the project properties page

utils/java/org.wesnoth/src/org/wesnoth/Constants.java

@@ -67,6 +67,7 @@ public class Constants
 	/** Install preferences */
 	public static final String P_INST_DEFAULT_INSTALL   = "inst_default"; //$NON-NLS-1$
 	public static final String P_INST_INSTALL_LIST      = "inst_list"; //$NON-NLS-1$
+	public static final String P_INST_NAME_PREFIX       = "inst_name"; //$NON-NLS-1$
 
 	/** Wizards Constants **/
 	public static final int		WIZ_TextBoxHeight       = 21;

utils/java/org.wesnoth/src/org/wesnoth/propertypages/WesnothProjectPage.java

@@ -2,6 +2,8 @@ package org.wesnoth.propertypages;
 
 import java.util.List;
 
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.layout.GridData;
@@ -13,19 +15,33 @@ import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.ui.IWorkbenchPropertyPage;
 import org.eclipse.ui.dialogs.PropertyPage;
+import org.wesnoth.utils.ProjectCache;
+import org.wesnoth.utils.ProjectUtils;
 import org.wesnoth.utils.WesnothInstallsUtils;
 import org.wesnoth.utils.WesnothInstallsUtils.WesnothInstall;
 
 public class WesnothProjectPage extends PropertyPage implements IWorkbenchPropertyPage
 {
     private Combo cmbInstall_;
+    private ProjectCache currProjectCache_;
+
     public WesnothProjectPage()
     {
+        currProjectCache_ = null;
     }
 
     @Override
     protected Control createContents( Composite parent )
     {
+        IAdaptable selectedElement = getElement( );
+        if ( !( selectedElement instanceof IProject ) ) {
+            return new Composite( parent, 0 );
+        }
+
+        IProject selectedProject = (IProject) selectedElement;
+
+        currProjectCache_ = ProjectUtils.getCacheForProject( selectedProject );
+
         Composite newComposite = new Composite( parent, 0 );
         newComposite.setLayout(new FillLayout(SWT.VERTICAL));
 
@@ -45,12 +61,27 @@ public class WesnothProjectPage extends PropertyPage implements IWorkbenchProper
         // fill the installs
         List<WesnothInstall> installs = WesnothInstallsUtils.getInstalls( );
 
+        boolean foundInstallInList = false;
+        String installName = currProjectCache_.getInstallName( );
+
         for ( WesnothInstall wesnothInstall : installs )
         {
             if ( wesnothInstall.Name.equalsIgnoreCase( "Default" ) )
                  continue;
 
             cmbInstall_.add( wesnothInstall.Name );
+
+            // current install is default?
+            if ( wesnothInstall.Name.equalsIgnoreCase( installName ) )
+            {
+                cmbInstall_.select( cmbInstall_.getItemCount( ) - 1 );
+                foundInstallInList = true;
+            }
+        }
+
+        // check if the current install name is existing
+        if ( !foundInstallInList && !installName.equalsIgnoreCase( "default" ) ) {
+            setErrorMessage( "The currently selected install does not exist. Please select another." );
         }
 
         return newComposite;
@@ -60,7 +91,9 @@ public class WesnothProjectPage extends PropertyPage implements IWorkbenchProper
     public boolean performOk()
     {
         // save settings.
-
+        if ( currProjectCache_ != null ){
+            currProjectCache_.setInstallName( cmbInstall_.getText( ) );
+        }
 
         return true;
     }

utils/java/org.wesnoth/src/org/wesnoth/utils/ProjectCache.java

@@ -15,7 +15,9 @@ import java.util.Map;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.jface.dialogs.DialogSettings;
 import org.eclipse.jface.dialogs.IDialogSettings;
+import org.wesnoth.Constants;
 import org.wesnoth.Logger;
+import org.wesnoth.preferences.Preferences;
 import org.wesnoth.preprocessor.Define;
 import org.wesnoth.wml.core.ConfigFile;
 import org.wesnoth.wml.core.Variable;
@@ -39,8 +41,12 @@ public class ProjectCache
 	private Map<String, ConfigFile> configFiles_;
 	private Map<String, Define> defines_;
 
+	private IProject project_;
+
 	public ProjectCache(IProject project)
 	{
+	    project_ = project;
+
 		configFiles_ = new HashMap<String, ConfigFile>();
 		defines_ = new HashMap<String, Define>(0);
 		propertiesTimetamp_ = 0;
@@ -227,4 +233,23 @@ public class ProjectCache
 	{
 		return defines_;
 	}
+
+	/**
+     * The name of the install used in the project
+     */
+	public String getInstallName()
+	{
+	    return Preferences.getString( Constants.P_INST_NAME_PREFIX + project_.getName( ) );
+	}
+
+	/**
+	 * Sets the new install used in the project
+	 * @param newInstallName The new install name
+	 */
+	public void setInstallName( String newInstallName )
+	{
+	    Preferences.getPreferences( ).setValue(
+	            Constants.P_INST_NAME_PREFIX + project_.getName( ),
+	            newInstallName );
+	}
 }

utils/java/org.wesnoth/src/org/wesnoth/wml/core/ConfigFile.java

@@ -16,7 +16,6 @@ import java.util.List;
  */
 public class ConfigFile
 {
-	private String filename_;
 
 	public String ScenarioId;
 	/**
@@ -28,13 +27,14 @@ public class ConfigFile
 
 	public String CampaignId;
 	/**
-     * True if there was a [campaign] tag present in the file.
-     *
-     * However The {@link ConfigFile#CampaignId} may be null
-     */
+	 * True if there was a [campaign] tag present in the file.
+	 *
+	 * However The {@link ConfigFile#CampaignId} may be null
+	 */
 	public boolean IsCampaign;
 
 	private List<Variable> variables_;
+	private String filename_;
 
 	public ConfigFile(String filename)
 	{