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

use crate::Border;
use crate::StateFlags;
use crate::StyleContextPrintFlags;
use crate::StyleProvider;
use glib::object::Cast;
use glib::object::IsA;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use std::boxed::Box as Box_;
use std::fmt;
use std::mem::transmute;

glib::wrapper! {
    /// [`StyleContext`][crate::StyleContext] stores styling information affecting a widget.
    ///
    /// In order to construct the final style information, [`StyleContext`][crate::StyleContext]
    /// queries information from all attached `GtkStyleProviders`. Style
    /// providers can be either attached explicitly to the context through
    /// [`StyleContextExt::add_provider()`][crate::prelude::StyleContextExt::add_provider()], or to the display through
    /// [`add_provider_for_display()`][Self::add_provider_for_display()]. The resulting
    /// style is a combination of all providers’ information in priority order.
    ///
    /// For GTK widgets, any [`StyleContext`][crate::StyleContext] returned by
    /// [`WidgetExt::style_context()`][crate::prelude::WidgetExt::style_context()] will already have a [`gdk::Display`][crate::gdk::Display]
    /// and RTL/LTR information set. The style context will also be updated
    /// automatically if any of these settings change on the widget.
    ///
    /// # Style Classes
    ///
    /// Widgets can add style classes to their context, which can be used to associate
    /// different styles by class. The documentation for individual widgets lists
    /// which style classes it uses itself, and which style classes may be added by
    /// applications to affect their appearance.
    ///
    /// # Custom styling in UI libraries and applications
    ///
    /// If you are developing a library with custom widgets that render differently
    /// than standard components, you may need to add a [`StyleProvider`][crate::StyleProvider] yourself
    /// with the `GTK_STYLE_PROVIDER_PRIORITY_FALLBACK` priority, either a
    /// [`CssProvider`][crate::CssProvider] or a custom object implementing the [`StyleProvider`][crate::StyleProvider]
    /// interface. This way themes may still attempt to style your UI elements in
    /// a different way if needed so.
    ///
    /// If you are using custom styling on an applications, you probably want then
    /// to make your style information prevail to the theme’s, so you must use
    /// a [`StyleProvider`][crate::StyleProvider] with the `GTK_STYLE_PROVIDER_PRIORITY_APPLICATION`
    /// priority, keep in mind that the user settings in
    /// `XDG_CONFIG_HOME/gtk-4.0/gtk.css` will
    /// still take precedence over your changes, as it uses the
    /// `GTK_STYLE_PROVIDER_PRIORITY_USER` priority.
    ///
    /// # Implements
    ///
    /// [`StyleContextExt`][trait@crate::prelude::StyleContextExt], [`trait@glib::ObjectExt`]
    #[doc(alias = "GtkStyleContext")]
    pub struct StyleContext(Object<ffi::GtkStyleContext, ffi::GtkStyleContextClass>);

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

impl StyleContext {
    pub const NONE: Option<&'static StyleContext> = None;

    /// Adds a global style provider to @display, which will be used
    /// in style construction for all `GtkStyleContexts` under @display.
    ///
    /// GTK uses this to make styling information from [`Settings`][crate::Settings]
    /// available.
    ///
    /// Note: If both priorities are the same, A [`StyleProvider`][crate::StyleProvider]
    /// added through [`StyleContextExt::add_provider()`][crate::prelude::StyleContextExt::add_provider()] takes
    /// precedence over another added through this function.
    /// ## `display`
    /// a [`gdk::Display`][crate::gdk::Display]
    /// ## `provider`
    /// a [`StyleProvider`][crate::StyleProvider]
    /// ## `priority`
    /// the priority of the style provider. The lower
    ///   it is, the earlier it will be used in the style construction.
    ///   Typically this will be in the range between
    ///   `GTK_STYLE_PROVIDER_PRIORITY_FALLBACK` and
    ///   `GTK_STYLE_PROVIDER_PRIORITY_USER`
    #[doc(alias = "gtk_style_context_add_provider_for_display")]
    pub fn add_provider_for_display(
        display: &impl IsA<gdk::Display>,
        provider: &impl IsA<StyleProvider>,
        priority: u32,
    ) {
        skip_assert_initialized!();
        unsafe {
            ffi::gtk_style_context_add_provider_for_display(
                display.as_ref().to_glib_none().0,
                provider.as_ref().to_glib_none().0,
                priority,
            );
        }
    }

    /// Removes @provider from the global style providers list in @display.
    /// ## `display`
    /// a [`gdk::Display`][crate::gdk::Display]
    /// ## `provider`
    /// a [`StyleProvider`][crate::StyleProvider]
    #[doc(alias = "gtk_style_context_remove_provider_for_display")]
    pub fn remove_provider_for_display(
        display: &impl IsA<gdk::Display>,
        provider: &impl IsA<StyleProvider>,
    ) {
        skip_assert_initialized!();
        unsafe {
            ffi::gtk_style_context_remove_provider_for_display(
                display.as_ref().to_glib_none().0,
                provider.as_ref().to_glib_none().0,
            );
        }
    }
}

/// Trait containing all [`struct@StyleContext`] methods.
///
/// # Implementors
///
/// [`StyleContext`][struct@crate::StyleContext]
pub trait StyleContextExt: 'static {
    /// Adds a style class to @self, so later uses of the
    /// style context will make use of this new class for styling.
    ///
    /// In the CSS file format, a [`Entry`][crate::Entry] defining a “search”
    /// class, would be matched by:
    ///
    /// ```css
    /// entry.search { ... }
    /// ```
    ///
    /// While any widget defining a “search” class would be
    /// matched by:
    /// ```css
    /// .search { ... }
    /// ```
    /// ## `class_name`
    /// class name to use in styling
    #[doc(alias = "gtk_style_context_add_class")]
    fn add_class(&self, class_name: &str);

    /// Adds a style provider to @self, to be used in style construction.
    ///
    /// Note that a style provider added by this function only affects
    /// the style of the widget to which @self belongs. If you want
    /// to affect the style of all widgets, use
    /// [`StyleContext::add_provider_for_display()`][crate::StyleContext::add_provider_for_display()].
    ///
    /// Note: If both priorities are the same, a [`StyleProvider`][crate::StyleProvider]
    /// added through this function takes precedence over another added
    /// through [`StyleContext::add_provider_for_display()`][crate::StyleContext::add_provider_for_display()].
    /// ## `provider`
    /// a [`StyleProvider`][crate::StyleProvider]
    /// ## `priority`
    /// the priority of the style provider. The lower
    ///   it is, the earlier it will be used in the style construction.
    ///   Typically this will be in the range between
    ///   `GTK_STYLE_PROVIDER_PRIORITY_FALLBACK` and
    ///   `GTK_STYLE_PROVIDER_PRIORITY_USER`
    #[doc(alias = "gtk_style_context_add_provider")]
    fn add_provider(&self, provider: &impl IsA<StyleProvider>, priority: u32);

    /// Gets the border for a given state as a [`Border`][crate::Border].
    ///
    /// # Returns
    ///
    ///
    /// ## `border`
    /// return value for the border settings
    #[doc(alias = "gtk_style_context_get_border")]
    #[doc(alias = "get_border")]
    fn border(&self) -> Border;

    /// Gets the foreground color for a given state.
    ///
    /// # Returns
    ///
    ///
    /// ## `color`
    /// return value for the foreground color
    #[doc(alias = "gtk_style_context_get_color")]
    #[doc(alias = "get_color")]
    fn color(&self) -> gdk::RGBA;

    /// Returns the [`gdk::Display`][crate::gdk::Display] to which @self is attached.
    ///
    /// # Returns
    ///
    /// a [`gdk::Display`][crate::gdk::Display].
    #[doc(alias = "gtk_style_context_get_display")]
    #[doc(alias = "get_display")]
    fn display(&self) -> gdk::Display;

    /// Gets the margin for a given state as a [`Border`][crate::Border].
    ///
    /// # Returns
    ///
    ///
    /// ## `margin`
    /// return value for the margin settings
    #[doc(alias = "gtk_style_context_get_margin")]
    #[doc(alias = "get_margin")]
    fn margin(&self) -> Border;

    /// Gets the padding for a given state as a [`Border`][crate::Border].
    ///
    /// # Returns
    ///
    ///
    /// ## `padding`
    /// return value for the padding settings
    #[doc(alias = "gtk_style_context_get_padding")]
    #[doc(alias = "get_padding")]
    fn padding(&self) -> Border;

    /// Returns the scale used for assets.
    ///
    /// # Returns
    ///
    /// the scale
    #[doc(alias = "gtk_style_context_get_scale")]
    #[doc(alias = "get_scale")]
    fn scale(&self) -> i32;

    /// Returns the state used for style matching.
    ///
    /// This method should only be used to retrieve the [`StateFlags`][crate::StateFlags]
    /// to pass to [`StyleContext`][crate::StyleContext] methods, like
    /// [`padding()`][Self::padding()].
    /// If you need to retrieve the current state of a [`Widget`][crate::Widget], use
    /// [`WidgetExt::state_flags()`][crate::prelude::WidgetExt::state_flags()].
    ///
    /// # Returns
    ///
    /// the state flags
    #[doc(alias = "gtk_style_context_get_state")]
    #[doc(alias = "get_state")]
    fn state(&self) -> StateFlags;

    /// Returns [`true`] if @self currently has defined the
    /// given class name.
    /// ## `class_name`
    /// a class name
    ///
    /// # Returns
    ///
    /// [`true`] if @self has @class_name defined
    #[doc(alias = "gtk_style_context_has_class")]
    fn has_class(&self, class_name: &str) -> bool;

    /// Looks up and resolves a color name in the @self color map.
    /// ## `color_name`
    /// color name to lookup
    ///
    /// # Returns
    ///
    /// [`true`] if @color_name was found and resolved, [`false`] otherwise
    ///
    /// ## `color`
    /// Return location for the looked up color
    #[doc(alias = "gtk_style_context_lookup_color")]
    fn lookup_color(&self, color_name: &str) -> Option<gdk::RGBA>;

    /// Removes @class_name from @self.
    /// ## `class_name`
    /// class name to remove
    #[doc(alias = "gtk_style_context_remove_class")]
    fn remove_class(&self, class_name: &str);

    /// Removes @provider from the style providers list in @self.
    /// ## `provider`
    /// a [`StyleProvider`][crate::StyleProvider]
    #[doc(alias = "gtk_style_context_remove_provider")]
    fn remove_provider(&self, provider: &impl IsA<StyleProvider>);

    /// Restores @self state to a previous stage.
    ///
    /// See [`save()`][Self::save()].
    #[doc(alias = "gtk_style_context_restore")]
    fn restore(&self);

    /// Saves the @self state.
    ///
    /// This allows temporary modifications done through
    /// [`add_class()`][Self::add_class()],
    /// [`remove_class()`][Self::remove_class()],
    /// [`set_state()`][Self::set_state()] to be quickly
    /// reverted in one go through [`restore()`][Self::restore()].
    ///
    /// The matching call to [`restore()`][Self::restore()]
    /// must be done before GTK returns to the main loop.
    #[doc(alias = "gtk_style_context_save")]
    fn save(&self);

    /// Attaches @self to the given display.
    ///
    /// The display is used to add style information from “global”
    /// style providers, such as the display's [`Settings`][crate::Settings] instance.
    ///
    /// If you are using a [`StyleContext`][crate::StyleContext] returned from
    /// [`WidgetExt::style_context()`][crate::prelude::WidgetExt::style_context()], you do not need to
    /// call this yourself.
    /// ## `display`
    /// a [`gdk::Display`][crate::gdk::Display]
    #[doc(alias = "gtk_style_context_set_display")]
    fn set_display(&self, display: &impl IsA<gdk::Display>);

    /// Sets the scale to use when getting image assets for the style.
    /// ## `scale`
    /// scale
    #[doc(alias = "gtk_style_context_set_scale")]
    fn set_scale(&self, scale: i32);

    /// Sets the state to be used for style matching.
    /// ## `flags`
    /// state to represent
    #[doc(alias = "gtk_style_context_set_state")]
    fn set_state(&self, flags: StateFlags);

    /// Converts the style context into a string representation.
    ///
    /// The string representation always includes information about
    /// the name, state, id, visibility and style classes of the CSS
    /// node that is backing @self. Depending on the flags, more
    /// information may be included.
    ///
    /// This function is intended for testing and debugging of the
    /// CSS implementation in GTK. There are no guarantees about
    /// the format of the returned string, it may change.
    /// ## `flags`
    /// Flags that determine what to print
    ///
    /// # Returns
    ///
    /// a newly allocated string representing @self
    #[doc(alias = "gtk_style_context_to_string")]
    fn to_string(&self, flags: StyleContextPrintFlags) -> glib::GString;

    #[doc(alias = "display")]
    fn connect_display_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
}

impl<O: IsA<StyleContext>> StyleContextExt for O {
    fn add_class(&self, class_name: &str) {
        unsafe {
            ffi::gtk_style_context_add_class(
                self.as_ref().to_glib_none().0,
                class_name.to_glib_none().0,
            );
        }
    }

    fn add_provider(&self, provider: &impl IsA<StyleProvider>, priority: u32) {
        unsafe {
            ffi::gtk_style_context_add_provider(
                self.as_ref().to_glib_none().0,
                provider.as_ref().to_glib_none().0,
                priority,
            );
        }
    }

    fn border(&self) -> Border {
        unsafe {
            let mut border = Border::uninitialized();
            ffi::gtk_style_context_get_border(
                self.as_ref().to_glib_none().0,
                border.to_glib_none_mut().0,
            );
            border
        }
    }

    fn color(&self) -> gdk::RGBA {
        unsafe {
            let mut color = gdk::RGBA::uninitialized();
            ffi::gtk_style_context_get_color(
                self.as_ref().to_glib_none().0,
                color.to_glib_none_mut().0,
            );
            color
        }
    }

    fn display(&self) -> gdk::Display {
        unsafe {
            from_glib_none(ffi::gtk_style_context_get_display(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn margin(&self) -> Border {
        unsafe {
            let mut margin = Border::uninitialized();
            ffi::gtk_style_context_get_margin(
                self.as_ref().to_glib_none().0,
                margin.to_glib_none_mut().0,
            );
            margin
        }
    }

    fn padding(&self) -> Border {
        unsafe {
            let mut padding = Border::uninitialized();
            ffi::gtk_style_context_get_padding(
                self.as_ref().to_glib_none().0,
                padding.to_glib_none_mut().0,
            );
            padding
        }
    }

    fn scale(&self) -> i32 {
        unsafe { ffi::gtk_style_context_get_scale(self.as_ref().to_glib_none().0) }
    }

    fn state(&self) -> StateFlags {
        unsafe {
            from_glib(ffi::gtk_style_context_get_state(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn has_class(&self, class_name: &str) -> bool {
        unsafe {
            from_glib(ffi::gtk_style_context_has_class(
                self.as_ref().to_glib_none().0,
                class_name.to_glib_none().0,
            ))
        }
    }

    fn lookup_color(&self, color_name: &str) -> Option<gdk::RGBA> {
        unsafe {
            let mut color = gdk::RGBA::uninitialized();
            let ret = from_glib(ffi::gtk_style_context_lookup_color(
                self.as_ref().to_glib_none().0,
                color_name.to_glib_none().0,
                color.to_glib_none_mut().0,
            ));
            if ret {
                Some(color)
            } else {
                None
            }
        }
    }

    fn remove_class(&self, class_name: &str) {
        unsafe {
            ffi::gtk_style_context_remove_class(
                self.as_ref().to_glib_none().0,
                class_name.to_glib_none().0,
            );
        }
    }

    fn remove_provider(&self, provider: &impl IsA<StyleProvider>) {
        unsafe {
            ffi::gtk_style_context_remove_provider(
                self.as_ref().to_glib_none().0,
                provider.as_ref().to_glib_none().0,
            );
        }
    }

    fn restore(&self) {
        unsafe {
            ffi::gtk_style_context_restore(self.as_ref().to_glib_none().0);
        }
    }

    fn save(&self) {
        unsafe {
            ffi::gtk_style_context_save(self.as_ref().to_glib_none().0);
        }
    }

    fn set_display(&self, display: &impl IsA<gdk::Display>) {
        unsafe {
            ffi::gtk_style_context_set_display(
                self.as_ref().to_glib_none().0,
                display.as_ref().to_glib_none().0,
            );
        }
    }

    fn set_scale(&self, scale: i32) {
        unsafe {
            ffi::gtk_style_context_set_scale(self.as_ref().to_glib_none().0, scale);
        }
    }

    fn set_state(&self, flags: StateFlags) {
        unsafe {
            ffi::gtk_style_context_set_state(self.as_ref().to_glib_none().0, flags.into_glib());
        }
    }

    fn to_string(&self, flags: StyleContextPrintFlags) -> glib::GString {
        unsafe {
            from_glib_full(ffi::gtk_style_context_to_string(
                self.as_ref().to_glib_none().0,
                flags.into_glib(),
            ))
        }
    }

    fn connect_display_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_display_trampoline<
            P: IsA<StyleContext>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkStyleContext,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(StyleContext::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::display\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_display_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

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