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// This file was generated by gir (https://github.com/gtk-rs/gir @ fe7a6ff+)
// from gir-files (https://github.com/gtk-rs/gir-files @ b215ee8)
// DO NOT EDIT

use ContentEncoding;
use EncodingConstraint;
use Filter;
use FilterBestFlags;
use ffi;
use glib::object::Downcast;
use glib::object::IsA;
use glib::translate::*;
use glib_ffi;
use gobject_ffi;
use std::mem;
use std::ptr;

glib_wrapper! {
    /// A filter for calculating the best encoding and/or charset to encode
    /// the data passed through it.
    ///
    /// # Implements
    ///
    /// [`FilterBestExt`](trait.FilterBestExt.html), [`FilterExt`](trait.FilterExt.html)
    pub struct FilterBest(Object<ffi::GMimeFilterBest, ffi::GMimeFilterBestClass>): Filter;

    match fn {
        get_type => || ffi::g_mime_filter_best_get_type(),
    }
}

impl FilterBest {
    /// Creates a new GMimeFilterBest filter. `flags` are used to determine
    /// which information to keep statistics of. If the
    /// `FilterBestFlags::Charset` bit is set, the filter will be able to
    /// compute the best charset for encoding the stream of data
    /// filtered. If the `FilterBestFlags::Encoding` bit is set, the filter
    /// will be able to compute the best Content-Transfer-Encoding for use
    /// with the stream being filtered.
    ///
    /// Note: In order for the `FilterBestExt::charset` function to
    /// work, the stream being filtered MUST already be encoded in UTF-8.
    /// ## `flags`
    /// filter flags
    ///
    /// # Returns
    ///
    /// a new best filter with flags `flags`.
    pub fn new(flags: FilterBestFlags) -> FilterBest {
        unsafe {
            Filter::from_glib_full(ffi::g_mime_filter_best_new(flags.to_glib())).downcast_unchecked()
        }
    }
}

/// Trait containing all `FilterBest` methods.
///
/// # Implementors
///
/// [`FilterBest`](struct.FilterBest.html)
pub trait FilterBestExt {
    /// Calculates the best charset for encoding the stream filtered
    /// through the `self` filter.
    ///
    /// # Returns
    ///
    /// a pointer to a string containing the name of the charset
    /// best suited for the text filtered through `self`.
    fn charset(&self) -> Option<String>;

    /// Calculates the most efficient Content-Transfer-Encoding for the
    /// stream filtered through `self` that fits within the encoding
    /// `constraint`.
    /// ## `constraint`
    /// a `EncodingConstraint`
    ///
    /// # Returns
    ///
    /// the best encoding for the stream filtered by `self`.
    fn encoding(&self, constraint: EncodingConstraint) -> ContentEncoding;
}

impl<O: IsA<FilterBest>> FilterBestExt for O {
    fn charset(&self) -> Option<String> {
        unsafe {
            from_glib_none(ffi::g_mime_filter_best_charset(self.to_glib_none().0))
        }
    }

    fn encoding(&self, constraint: EncodingConstraint) -> ContentEncoding {
        unsafe {
            from_glib(ffi::g_mime_filter_best_encoding(self.to_glib_none().0, constraint.to_glib()))
        }
    }
}