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// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use glib::object::IsA;
use glib::translate::*;
use std::fmt;

glib::wrapper! {
    /// [`FontMap`][crate::FontMap] is an interface exported by font maps for
    /// use with Cairo. The actual type of the font map will depend
    /// on the particular font technology Cairo was compiled to use.
    ///
    /// # Implements
    ///
    /// [`FontMapExt`][trait@crate::prelude::FontMapExt], [`trait@pango::prelude::FontMapExt`], [`FontMapExtManual`][trait@crate::prelude::FontMapExtManual]
    #[doc(alias = "PangoCairoFontMap")]
    pub struct FontMap(Interface<ffi::PangoCairoFontMap>) @requires pango::FontMap;

    match fn {
        type_ => || ffi::pango_cairo_font_map_get_type(),
    }
}

impl FontMap {
    /// Gets a default [`FontMap`][crate::FontMap] to use with Cairo.
    ///
    /// Note that the type of the returned object will depend
    /// on the particular font backend Cairo was compiled to use;
    /// You generally should only use the [`pango::FontMap`][crate::pango::FontMap] and
    /// [`FontMap`][crate::FontMap] interfaces on the returned object.
    ///
    /// The default Cairo fontmap can be changed by using
    /// [`FontMapExtManual::set_default()`][crate::prelude::FontMapExtManual::set_default()]. This can be used to
    /// change the Cairo font backend that the default fontmap
    /// uses for example.
    ///
    /// Note that since Pango 1.32.6, the default fontmap is per-thread.
    /// Each thread gets its own default fontmap. In this way,
    /// PangoCairo can be used safely from multiple threads.
    ///
    /// # Returns
    ///
    /// the default PangoCairo fontmap
    ///  for the current thread. This object is owned by Pango and must not be freed.
    #[doc(alias = "pango_cairo_font_map_get_default")]
    #[doc(alias = "get_default")]
    pub fn default() -> Option<pango::FontMap> {
        unsafe { from_glib_none(ffi::pango_cairo_font_map_get_default()) }
    }
}

pub const NONE_FONT_MAP: Option<&FontMap> = None;

/// Trait containing all [`struct@FontMap`] methods.
///
/// # Implementors
///
/// [`FontMap`][struct@crate::FontMap]
pub trait FontMapExt: 'static {
    /// Gets the resolution for the fontmap. See [`set_resolution()`][Self::set_resolution()]
    ///
    /// # Returns
    ///
    /// the resolution in "dots per inch"
    #[doc(alias = "pango_cairo_font_map_get_resolution")]
    #[doc(alias = "get_resolution")]
    fn resolution(&self) -> f64;

    /// Sets the resolution for the fontmap. This is a scale factor between
    /// points specified in a `PangoFontDescription` and Cairo units. The
    /// default value is 96, meaning that a 10 point font will be 13
    /// units high. (10 * 96. / 72. = 13.3).
    /// ## `dpi`
    /// the resolution in "dots per inch". (Physical inches aren't actually
    ///  involved; the terminology is conventional.)
    #[doc(alias = "pango_cairo_font_map_set_resolution")]
    fn set_resolution(&self, dpi: f64);
}

impl<O: IsA<FontMap>> FontMapExt for O {
    fn resolution(&self) -> f64 {
        unsafe { ffi::pango_cairo_font_map_get_resolution(self.as_ref().to_glib_none().0) }
    }

    fn set_resolution(&self, dpi: f64) {
        unsafe {
            ffi::pango_cairo_font_map_set_resolution(self.as_ref().to_glib_none().0, dpi);
        }
    }
}

impl fmt::Display for FontMap {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("FontMap")
    }
}