Creates a new diff painter for a vertical ruler column.
Ensures that the column is fully instantiated, i.e. has a control, and that the
viewer is visible.
Computes the end index of a line range.
Returns the System background color for list widgets or the set background.
Returns the color for the given line diff info.
Returns the color for deleted lines.
Retrieves the ILineDiffInfo for line from the model. There are optimizations for
direct access and s
Returns the quick diff hover set by #setHover(IAnnotationHover).
Sets the background color for changed lines.
Returns the width of the column.
Returns the grey value in which the given color would be drawn in grey-scale.
Returns true if the receiver can provide a hover for a certain document line.