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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 pango;
use pango_cairo_sys;
use std::fmt;

glib_wrapper! {
    /// `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.FontMapExt.html), [`pango::FontMapExt`](../pango/trait.FontMapExt.html), [`FontMapExtManual`](prelude/trait.FontMapExtManual.html)
    pub struct FontMap(Interface<pango_cairo_sys::PangoCairoFontMap>) @requires pango::FontMap;

    match fn {
        get_type => || pango_cairo_sys::pango_cairo_font_map_get_type(),
    }
}

impl FontMap {
    /// Gets a default `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` and
    /// `FontMap` interfaces on the returned object.
    ///
    /// The default Cairo fontmap can be changed by using
    /// `FontMap::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.
    pub fn get_default() -> Option<pango::FontMap> {
        unsafe { from_glib_none(pango_cairo_sys::pango_cairo_font_map_get_default()) }
    }
}

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

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

    /// Sets the resolution for the fontmap. This is a scale factor between
    /// points specified in a `pango::FontDescription` 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.)
    fn set_resolution(&self, dpi: f64);
}

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

    fn set_resolution(&self, dpi: f64) {
        unsafe {
            pango_cairo_sys::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 {
        write!(f, "FontMap")
    }
}