FreeBSD Manual Pages
TICKIT_PEN(7) Miscellaneous Information Manual TICKIT_PEN(7) NAME TickitPen - store a collection of terminal rendering attributes SYNOPSIS #include <tickit.h> typedef struct TickitPen; DESCRIPTION A TickitPen instance stores a collection of terminal rendering attrib- utes. For each known attribute, a pen instance may store a value for this attribute. A pen instance is used in the tickit_term_chpen(3) and tickit_term_setpen(3) functions. FUNCTIONS A new TickitPen instance is created using the tickit_pen_new(3) func- tion. A pen instance stores a reference count to make it easier for ap- plications to manage the lifetime of pens. A new pen starts with a count of one, and it can be adjusted using tickit_pen_ref(3) and tickit_pen_unref(3). When the count reaches zero the instance is de- stroyed. ATTRIBUTES The TickitPenAttr enumeration lists the attributes known by a pen. Each attribute has a type, as given by the TickitPenAttrType enumeration. The tickit_penattr_type(3) function gives the type of a given at- tribute. The tickit_penattr_name(3) function gives the name of a given attribute, which is also given below in parentheses. The tickit_pe- nattr_lookup(3) function looks up an attribute constant from a string containing the name. TICKIT_PEN_FG ("fg"), TICKIT_PEN_BG ("bg") foreground and background colours. These are of type TICKIT_PEN- TYPE_COLOUR. This gives an integer from 0 to 255 to use as the colour index. It may also be set to the value -1, which sets the terminal's default, which may be a colour distinct from any of the others. Some terminals may not support more than 8 or 16 colours, however. When setting a pen colour on a terminal, it may be converted to one that is supported by the terminal tickit_term_setpen(3) or tickit_term_chpen(3) functions. These colour attributes also support a secondary RGB8 (24-bit) specifi- cation, which some terminal drivers may prefer over the indexed ver- sion. TICKIT_PEN_BOLD ("b"), TICKIT_PEN_ITALIC ("i"), TICKIT_PEN_REVERSE ("rv"), TICKIT_PEN_STRIKE ("strike"), TICKIT_PEN_BLINK ("blink") boolean rendering attributes. These are of type TICKIT_PEN- TYPE_BOOL. They are either true or false. Most terminals should support at least bold, underline, reverse and blink, though italic and strikethrough are less commonly supported. Applica- tions are advised not to use these two alone to distinguish sig- nificant parts of the user interface. TICKIT_PEN_UNDER ("u") underline. This is of type TICKIT_PENTYPE_INT. Its value is one of the values from the TickitPenUnderline enumeration. Most ter- minals should support the single underline value, however other values are less commonly supported, and may be drawn instead as a single underline. Applications are advised not to make use of underline style alone to distinguish significant parts of the user interface. Valid values are: TICKIT_PEN_UNDER_NONE No underline. TICKIT_PEN_UNDER_SINGLE Single underline. TICKIT_PEN_UNDER_DOUBLE Double underline. TICKIT_PEN_UNDER_WAVY Single wavy underline, sometimes called "undercurl". For backward-compatibility this attribute will also behave like a boolean-typed attribute. When set to any value other than none, it appears true as a boolean. Setting it to true as a booelan will set its value to single. TICKIT_PEN_ALTFONT ("af") alternate font index. This is of type TICKIT_PENTYPE_INT. It is a value 0 to 9, which selects from the terminal's available fonts. Few terminals actually support this in practice. TICKIT_PEN_SIZEPOS ("sizepos") effects on the size and position of the text. This is of type TICKIT_PENTYPE_INT. Its value is one of the values from the TickitPenSizePosition enumeration. Relatively few terminals will actually support these options, so applications are advised to treat them purely as decoration. Valid values are: TICKIT_PEN_SIZEPOS_NORMAL No additional effect. TICKIT_PEN_SIZEPOS_SUPERSCRIPT Text is displayed in a smaller size and raised in posi- tion above the normal baseline. TICKIT_PEN_SIZEPOS_SUBSCRIPT Text is displayed in a smaller size and lowered in posi- tion below the normal baseline. FUNCTIONS The values of attributes are set or queried on a pen instance by using functions depending on the type of the attribute. Boolean attributes use tickit_pen_set_bool_attr(3) and tickit_pen_get_bool_attr(3). Inte- ger attributes use tickit_pen_set_int_attr(3) and tickit_pen_get_int_attr(3). Colour attributes use tickit_pen_set_colour_attr(3), tickit_pen_set_colour_attr_desc(3) and tickit_pen_get_colour_attr(3). The RGB8 secondary field for colours can be set with tickit_pen_set_colour_attr_rgb8(3), and queried with tickit_pen_has_colour_attr_rgb8(3) and tickit_pen_get_colour_attr_rgb8(3). To test if an attribute has a value set, use tickit_pen_has_attr(3), and to remove the attribute entirely use tickit_pen_clear_attr(3). To test if a pen has any attributes set at all, use tickit_pen_is_non- empty(3), and to test if it has any attributes set to a non-default value use tickit_pen_is_nondefault(3). To remove all the attributes use tickit_pen_clear(3). To copy the value of one attribute from a pen into another pen use tickit_pen_copy_attr(3), to copy the entire pen use tickit_pen_copy(3), and to compare two pens for equality use tickit_pen_equiv_attr(3). EVENTS A pen instance stores a list of event handlers. Each event handler is associated with one event type and stores a function pointer, and an arbitrary pointer containing user data. Event handlers may be installed using tickit_pen_bind_event(3) and removed using tickit_pen_un- bind_event_id(3). The event types recognised are: TICKIT_PEN_ON_DESTROY The pen instance is being destroyed. TICKIT_PEN_ON_CHANGE The stored attributes on the pen have changed. The info pointer will be NULL. TICKIT_PEN(7)
NAME | SYNOPSIS | DESCRIPTION | FUNCTIONS | ATTRIBUTES | FUNCTIONS | EVENTS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=tickit_pen&sektion=7&manpath=FreeBSD+Ports+15.0>