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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;
use glib::object::IsA;
use glib::translate::*;
use gtk_sys;
use std::fmt;
use StateFlags;
use WidgetPath;

glib_wrapper! {
    /// `StyleProvider` is an interface used to provide style information to a `StyleContext`.
    /// See `StyleContextExt::add_provider` and `StyleContext::add_provider_for_screen`.
    ///
    /// # Implements
    ///
    /// [`StyleProviderExt`](trait.StyleProviderExt.html)
    pub struct StyleProvider(Interface<gtk_sys::GtkStyleProvider>);

    match fn {
        get_type => || gtk_sys::gtk_style_provider_get_type(),
    }
}

pub const NONE_STYLE_PROVIDER: Option<&StyleProvider> = None;

/// Trait containing all `StyleProvider` methods.
///
/// # Implementors
///
/// [`CssProvider`](struct.CssProvider.html), [`Settings`](struct.Settings.html), [`StyleProperties`](struct.StyleProperties.html), [`StyleProvider`](struct.StyleProvider.html)
pub trait StyleProviderExt: 'static {
    /// Looks up a widget style property as defined by `self` for
    /// the widget represented by `path`.
    /// ## `path`
    /// `WidgetPath` to query
    /// ## `state`
    /// state to query the style property for
    /// ## `pspec`
    /// The `gobject::ParamSpec` to query
    /// ## `value`
    /// return location for the property value
    ///
    /// # Returns
    ///
    /// `true` if the property was found and has a value, `false` otherwise
    fn get_style_property(
        &self,
        path: &WidgetPath,
        state: StateFlags,
        pspec: &glib::ParamSpec,
    ) -> Option<glib::Value>;
}

impl<O: IsA<StyleProvider>> StyleProviderExt for O {
    fn get_style_property(
        &self,
        path: &WidgetPath,
        state: StateFlags,
        pspec: &glib::ParamSpec,
    ) -> Option<glib::Value> {
        unsafe {
            let mut value = glib::Value::uninitialized();
            let ret = from_glib(gtk_sys::gtk_style_provider_get_style_property(
                self.as_ref().to_glib_none().0,
                path.to_glib_none().0,
                state.to_glib(),
                pspec.to_glib_none().0,
                value.to_glib_none_mut().0,
            ));
            if ret {
                Some(value)
            } else {
                None
            }
        }
    }
}

impl fmt::Display for StyleProvider {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "StyleProvider")
    }
}