plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/tables/mi/FontAndColorHelper.java

   1 package net.mograsim.plugin.tables.mi;
   2
   3 import org.eclipse.jface.resource.ColorRegistry;
   4 import org.eclipse.jface.resource.FontRegistry;
   5 import org.eclipse.jface.util.IPropertyChangeListener;
   6 import org.eclipse.jface.viewers.TableViewer;
   7 import org.eclipse.swt.SWT;
   8 import org.eclipse.swt.graphics.Color;
   9 import org.eclipse.swt.graphics.Font;
  10 import org.eclipse.swt.widgets.Display;
  11 import org.eclipse.ui.themes.ITheme;
  12 import org.eclipse.ui.themes.IThemeManager;
  13
  14 import net.mograsim.machine.mi.MicroInstructionMemory;
  15
  16 public class FontAndColorHelper
  17 {
  18         private final TableViewer viewer;
  19         private final IThemeManager themeManager;
  20         private long highlightedAddress = -1;
  21         private ColorRegistry cRegistry;
  22         private FontRegistry fRegistry;
  23         private Font boldItalic;
  24
  25         private final static String font = "net.mograsim.plugin.table_font",
  26                         colorModifBackground = "net.mograsim.plugin.modified_cell_bg_color",
  27                         colorModifForeground = "net.mograsim.plugin.modified_cell_fg_color",
  28                         colorHighlightedForeground = "net.mograsim.plugin.highlighted_cell_fg_color",
  29                         colorHighlightedBackground = "net.mograsim.plugin.highlighted_cell_bg_color";
  30         private final IPropertyChangeListener updateListener;
  31
  32         public FontAndColorHelper(TableViewer viewer, IThemeManager themeManager)
  33         {
  34                 this.viewer = viewer;
  35                 this.themeManager = themeManager;
  36                 themeChanged(themeManager.getCurrentTheme());
  37                 updateListener = e ->
  38                 {
  39                         switch (e.getProperty())
  40                         {
  41                         case IThemeManager.CHANGE_CURRENT_THEME:
  42                                 themeChanged(themeManager.getCurrentTheme());
  43                                 //$FALL-THROUGH$
  44                         case font:
  45                         case colorModifBackground:
  46                         case colorModifForeground:
  47                                 viewer.refresh();
  48                                 break;
  49                         default:
  50                                 break;
  51                         }
  52                 };
  53                 themeManager.addPropertyChangeListener(updateListener);
  54         }
  55
  56         private void themeChanged(ITheme theme)
  57         {
  58                 cRegistry = theme.getColorRegistry();
  59                 fRegistry = theme.getFontRegistry();
  60                 boldItalic = fRegistry.getDescriptor(font).setStyle(SWT.BOLD | SWT.ITALIC).createFont(Display.getDefault());
  61                 viewer.getTable().setFont(fRegistry.get(font));
  62         }
  63
  64         public Color getBackground(Object element, int column)
  65         {
  66                 InstructionTableRow row = (InstructionTableRow) element;
  67                 if (isDefault(row, column))
  68                 {
  69                         if (isHighlighted(row))
  70                                 return cRegistry.get(colorHighlightedBackground);
  71                         return viewer.getTable().getBackground();
  72                 }
  73                 return cRegistry.get(colorModifBackground);
  74         }
  75
  76         public Color getForeground(Object element, int column)
  77         {
  78                 InstructionTableRow row = (InstructionTableRow) element;
  79                 if (isDefault(row, column))
  80                 {
  81                         if (isHighlighted(row))
  82                                 return cRegistry.get(colorHighlightedForeground);
  83                         return viewer.getTable().getForeground();
  84                 }
  85                 return cRegistry.get(colorModifForeground);
  86         }
  87
  88         public Font getFont(Object element, int column)
  89         {
  90                 InstructionTableRow row = (InstructionTableRow) element;
  91                 boolean modified = !isDefault(row, column), highlighted = isHighlighted(row);
  92                 if (modified && highlighted)
  93                         return boldItalic;
  94                 if (modified)
  95                         return fRegistry.getItalic(font);
  96                 if (highlighted)
  97                         return fRegistry.getBold(font);
  98                 return fRegistry.get(font);
  99         }
 100
 101         private static boolean isDefault(InstructionTableRow row, int column)
 102         {
 103                 return column == -1 ? true : row.data.getCell(row.address).getParameter(column).isDefault();
 104         }
 105
 106         private boolean isHighlighted(InstructionTableRow row)
 107         {
 108                 return highlightedAddress == row.address;
 109         }
 110
 111         /**
 112          * @param index Index of the row to highlight; An negative index means no row is highlighted
 113          */
 114         public void highlight(long row)
 115         {
 116                 highlightedAddress = row + ((MicroInstructionMemory) viewer.getInput()).getDefinition().getMinimalAddress();
 117         }
 118
 119         public void dispose()
 120         {
 121                 themeManager.removePropertyChangeListener(updateListener);
 122         }
 123 }