Bug 56957 [Encoding] Reusable EncodingFieldEditor
I have added the ability to set an encoding for a repository so that commit messages and file names can be properly translated between a client and server whose encodings differ. I have extracted much of the code from IDEEditorsPreferencePage into an EncodingFieldEditor class so I could us it. I was planning on providing a patch to the UI with the hope that this class could be API but there is a roadblock that prevents this. Basically, the encoding preference is in a org.eclipse.core.Preferences node but a field editor requires an IPreferenceStore. There are already two adapters for this is the platform but one is a private inner class of AbstractUIPlugin and the other lives in the text plugin. Instead of creating a patch, I'm just attaching the EncodingFieldEditor class for future consideration.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceInfoPage.java
gd.horizontalAlignment = GridData.FILL;
			sizeValue.setLayoutData(gd);
			sizeValue.setFont(font);
		}
		return basicInfoComposite;
	}
	protected Control createContents(Composite parent) {
		WorkbenchHelp.setHelp(getControl(),
				IIDEHelpContextIds.RESOURCE_INFO_PROPERTY_PAGE);
		
		IResource resource = (IResource) getElement();
		if (resource.getType() != IResource.PROJECT) {
			this.previousReadOnlyValue = resource.isReadOnly();
			this.previousDerivedValue = resource.isDerived();
		}
		
		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginWidth = 0;
		layout.marginHeight = 0;
		composite.setLayout(layout);
		GridData data = new GridData(GridData.FILL);
		data.grabExcessHorizontalSpace = true;
		composite.setLayoutData(data);
		composite.setFont(parent.getFont());
		createBasicInfoGroup(composite, resource);
		createSeparator(composite);
		createStateGroup(composite, resource);
		new Label(composite, SWT.NONE); 
		createEncodingGroup(composite, resource);