Represent white space characters with symbols.

SpaceDrawer provides a way to visualize white spaces, by drawing symbols.

Call [[email protected]_space_drawer] to get the `GtkSourceSpaceDrawer` instance of a certain [class@View].

By default, no white spaces are drawn because the [property@SpaceDrawer:enable-matrix] is false.

To draw white spaces, [[email protected]_types_for_locations] can be called to set the [property@SpaceDrawer:matrix] property (by default all space types are enabled at all locations). Then call [[email protected]_enable_matrix].

For a finer-grained method, there is also the [class@Tag]'s [property@Tag:draw-spaces] property.

Example

To draw non-breaking spaces everywhere and draw all types of trailing spaces except newlines: ```c gtk_source_space_drawer_set_types_for_locations (space_drawer, GTK_SOURCE_SPACE_LOCATION_ALL, GTK_SOURCE_SPACE_TYPE_NBSP);

gtk_source_space_drawer_set_types_for_locations (space_drawer, GTK_SOURCE_SPACE_LOCATION_TRAILING, GTK_SOURCE_SPACE_TYPE_ALL & ~GTK_SOURCE_SPACE_TYPE_NEWLINE);

gtk_source_space_drawer_set_enable_matrix (space_drawer, TRUE); ```

Use-case: draw unwanted white spaces

A possible use-case is to draw only unwanted white spaces. Examples:

• Draw all trailing spaces.
• If the indentation and alignment must be done with spaces, draw tabs.

And non-breaking spaces can always be drawn, everywhere, to distinguish them from normal spaces.