Struct xcb::x::QueryTextExtents

pub struct QueryTextExtents<'a> {
    pub font: Fontable,
    pub string: &'a [Char2b],
}

get text extents

Query text extents from the X11 server. This request returns the bounding box of the specified 16-bit character string in the specified font or the font contained in the specified graphics context.

font_ascent is set to the maximum of the ascent metrics of all characters in the string. font_descent is set to the maximum of the descent metrics. overall_width is set to the sum of the character-width metrics of all characters in the string. For each character in the string, let W be the sum of the character-width metrics of all characters preceding it in the string. Let L be the left-side-bearing metric of the character plus W. Let R be the right-side-bearing metric of the character plus W. The lbearing member is set to the minimum L of all characters in the string. The rbearing member is set to the maximum R.

For fonts defined with linear indexing rather than 2-byte matrix indexing, each Char2b structure is interpreted as a 16-bit number with byte1 as the most significant byte. If the font has no defined default character, undefined characters in the string are taken to have all zero metrics.

Characters with all zero metrics are ignored. If the font has no defined default_char, the undefined characters in the string are also ignored.

This request replies QueryTextExtentsReply.

Associated cookie types are QueryTextExtentsCookie and QueryTextExtentsCookieUnchecked.

Fields

font: Fontable

The font to calculate text extents in. You can also pass a graphics context.

string: &'a [Char2b]

The text to get text extents for.

Trait Implementations

impl<'a> Clone for QueryTextExtents<'a>

fn clone(&self) -> QueryTextExtents<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for QueryTextExtents<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> RawRequest for QueryTextExtents<'a>

fn raw_request(&self, c: &Connection, checked: bool) -> u64

Actual implementation of the request sending

impl<'a> Request for QueryTextExtents<'a>

type Cookie = QueryTextExtentsCookie

The default cookie associated to this request.

const IS_VOID: bool = false

false if the request returns a reply, true otherwise.

impl<'a> RequestWithReply for QueryTextExtents<'a>

type Reply = QueryTextExtentsReply

Reply associated with the request

type Cookie = QueryTextExtentsCookie

Default cookie type for the request, as returned by Connection::send_request.

type CookieUnchecked = QueryTextExtentsCookieUnchecked

Unchecked cookie type for the request, as returned by Connection::send_request_unchecked.