+package net.mograsim.plugin.tables.mi;
+
+import org.eclipse.jface.resource.ColorRegistry;
+import org.eclipse.jface.resource.FontRegistry;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.ui.themes.ITheme;
+import org.eclipse.ui.themes.IThemeManager;
+
+import net.mograsim.machine.mi.MicroInstructionMemory;
+
+public class FontAndColorHelper
+{
+ private final TableViewer viewer;
+ private final IThemeManager themeManager;
+ private long highlightedAddress = -1;
+ private ColorRegistry cRegistry;
+ private FontRegistry fRegistry;
+ private Font boldItalic;
+
+ private final static String font = "net.mograsim.plugin.table_font",
+ colorModifBackground = "net.mograsim.plugin.modified_cell_bg_color",
+ colorModifForeground = "net.mograsim.plugin.modified_cell_fg_color",
+ colorHighlightedForeground = "net.mograsim.plugin.highlighted_cell_fg_color",
+ colorHighlightedBackground = "net.mograsim.plugin.highlighted_cell_bg_color";
+ private final IPropertyChangeListener updateListener;
+
+ public FontAndColorHelper(TableViewer viewer, IThemeManager themeManager)
+ {
+ this.viewer = viewer;
+ this.themeManager = themeManager;
+ themeChanged(themeManager.getCurrentTheme());
+ updateListener = e ->
+ {
+ switch (e.getProperty())
+ {
+ case IThemeManager.CHANGE_CURRENT_THEME:
+ themeChanged(themeManager.getCurrentTheme());
+ //$FALL-THROUGH$
+ case font:
+ case colorModifBackground:
+ case colorModifForeground:
+ viewer.refresh();
+ break;
+ default:
+ break;
+ }
+ };
+ themeManager.addPropertyChangeListener(updateListener);
+ }
+
+ private void themeChanged(ITheme theme)
+ {
+ cRegistry = theme.getColorRegistry();
+ fRegistry = theme.getFontRegistry();
+ boldItalic = fRegistry.getDescriptor(font).setStyle(SWT.BOLD | SWT.ITALIC).createFont(Display.getDefault());
+ viewer.getTable().setFont(fRegistry.get(font));
+ }
+
+ public Color getBackground(Object element, int column)
+ {
+ InstructionTableRow row = (InstructionTableRow) element;
+ if (isDefault(row, column))
+ {
+ if (isHighlighted(row))
+ return cRegistry.get(colorHighlightedBackground);
+ return viewer.getTable().getBackground();
+ }
+ return cRegistry.get(colorModifBackground);
+ }
+
+ public Color getForeground(Object element, int column)
+ {
+ InstructionTableRow row = (InstructionTableRow) element;
+ if (isDefault(row, column))
+ {
+ if (isHighlighted(row))
+ return cRegistry.get(colorHighlightedForeground);
+ return viewer.getTable().getForeground();
+ }
+ return cRegistry.get(colorModifForeground);
+ }
+
+ public Font getFont(Object element, int column)
+ {
+ InstructionTableRow row = (InstructionTableRow) element;
+ boolean modified = !isDefault(row, column), highlighted = isHighlighted(row);
+ if (modified && highlighted)
+ return boldItalic;
+ if (modified)
+ return fRegistry.getItalic(font);
+ if (highlighted)
+ return fRegistry.getBold(font);
+ return fRegistry.get(font);
+ }
+
+ private static boolean isDefault(InstructionTableRow row, int column)
+ {
+ return column == -1 ? true : row.data.getCell(row.address).getParameter(column).isDefault();
+ }
+
+ private boolean isHighlighted(InstructionTableRow row)
+ {
+ return highlightedAddress == row.address;
+ }
+
+ /**
+ * @param index Index of the row to highlight; An negative index means no row is highlighted
+ */
+ public void highlight(long row)
+ {
+ highlightedAddress = row + ((MicroInstructionMemory) viewer.getInput()).getDefinition().getMinimalAddress();
+ }
+
+ public void dispose()
+ {
+ themeManager.removePropertyChangeListener(updateListener);
+ }
+}