gstreamer/

structure.rs

// Take a look at the license at the top of the repository in the LICENSE file.

use std::{
    borrow::{Borrow, BorrowMut, ToOwned},
    fmt,
    marker::PhantomData,
    mem,
    ops::{Deref, DerefMut},
    ptr, str,
};

use cfg_if::cfg_if;
use glib::{
    prelude::*,
    translate::*,
    value::{FromValue, SendValue, Value},
    GStr, IntoGStr,
};

use crate::{ffi, Fraction, IdStr};

#[derive(Clone, Debug, Eq, PartialEq, thiserror::Error)]
pub enum GetError<E: std::error::Error> {
    #[error("GetError: Structure field with name {name} not found")]
    FieldNotFound { name: IdStr },
    #[error("GetError: Structure field with name {name} not retrieved")]
    ValueGetError {
        name: IdStr,
        #[source]
        error: E,
    },
}

impl<E: std::error::Error> GetError<E> {
    #[inline]
    fn new_field_not_found(name: impl AsRef<IdStr>) -> Self {
        skip_assert_initialized!();
        GetError::FieldNotFound {
            name: name.as_ref().clone(),
        }
    }

    #[inline]
    fn from_value_get_error(name: impl AsRef<IdStr>, error: E) -> Self {
        skip_assert_initialized!();
        GetError::ValueGetError {
            name: name.as_ref().clone(),
            error,
        }
    }
}

/// A [`Structure`][crate::Structure] is a collection of key/value pairs. The keys are expressed as
/// GQuarks and the values can be of any GType.
///
/// In addition to the key/value pairs, a [`Structure`][crate::Structure] also has a name. The name
/// starts with a letter and can be filled by letters, numbers and any of
/// "/-_.:".
///
/// [`Structure`][crate::Structure] is used by various GStreamer subsystems to store information in
/// a flexible and extensible way. A [`Structure`][crate::Structure] does not have a refcount
/// because it usually is part of a higher level object such as [`Caps`][crate::Caps],
/// [`Message`][crate::Message], [`Event`][crate::Event], [`Query`][crate::Query]. It provides a means to enforce mutability
/// using the refcount of the parent with the `gst_structure_set_parent_refcount()`
/// method.
///
/// A [`Structure`][crate::Structure] can be created with [`new_empty()`][Self::new_empty()] or
/// [`new()`][Self::new()], which both take a name and an optional set of key/value
/// pairs along with the types of the values.
///
/// Field values can be changed with `gst_structure_set_value()` or
/// `gst_structure_set()`.
///
/// Field values can be retrieved with `gst_structure_get_value()` or the more
/// convenient gst_structure_get_*() functions.
///
/// Fields can be removed with `gst_structure_remove_field()` or
/// `gst_structure_remove_fields()`.
///
/// Strings in structures must be ASCII or UTF-8 encoded. Other encodings are not
/// allowed. Strings may be [`None`] however.
///
/// ## The serialization format
///
/// GstStructure serialization format serialize the GstStructure name,
/// keys/GType/values in a comma separated list with the structure name as first
/// field without value followed by separated key/value pairs in the form
/// `key=value`, for example:
///
/// ```text
/// a-structure, key=value
/// ````
///
/// The values type will be inferred if not explicitly specified with the
/// `(GTypeName)value` syntax, for example the following struct will have one
/// field called 'is-string' which has the string 'true' as a value:
///
/// ```text
/// a-struct, field-is-string=(string)true, field-is-boolean=true
/// ```
///
/// *Note*: without specifying `(string), `field-is-string` type would have been
/// inferred as boolean.
///
/// *Note*: we specified `(string)` as a type even if `gchararray` is the actual
/// GType name as for convenience some well known types have been aliased or
/// abbreviated.
///
/// To avoid specifying the type, you can give some hints to the "type system".
/// For example to specify a value as a double, you should add a decimal (ie. `1`
/// is an `int` while `1.0` is a `double`).
///
/// *Note*: when a structure is serialized with `gst_structure_to_string`, all
/// values are explicitly typed.
///
/// Some types have special delimiters:
///
/// - [GstValueArray](GST_TYPE_ARRAY) are inside "less and greater than" (`<` and
///  `>`). For example `a-structure, array=<1, 2, 3>
/// - Ranges are inside brackets (`[` and `]`). For example `a-structure,
///  range=[1, 6, 2]` 1 being the min value, 6 the maximum and 2 the step. To
///  specify a `GST_TYPE_INT64_RANGE` you need to explicitly specify it like:
///  `a-structure, a-int64-range=(gint64) [1, 5]`
/// - [GstValueList](GST_TYPE_LIST) are inside curly brackets (`{` and `}`).
///  For example `a-structure, list={1, 2, 3}`
/// - [GStrv](G_TYPE_STRV) are inside "less and greater than" (`<` and
///  `>`) and each string is double-quoted.
///  For example `a-structure, strv=(GStrv)<"foo", "bar">`. Since 1.26.0.
///
/// Structures are delimited either by a null character `\0` or a semicolon `;`
/// the latter allowing to store multiple structures in the same string (see
/// [`Caps`][crate::Caps]).
///
/// Quotes are used as "default" delimiters and can be used around any types that
/// don't use other delimiters (for example `a-struct, i=(int)"1"`). They are use
/// to allow adding spaces or special characters (such as delimiters,
/// semicolumns, etc..) inside strings and you can use backslashes `\` to escape
/// characters inside them, for example:
///
/// ```text
/// a-struct, special="\"{[(;)]}\" can be used inside quotes"
/// ```
///
/// They also allow for nested structure, such as:
///
/// ```text
/// a-struct, nested=(GstStructure)"nested-struct, nested=true"
/// ```
///
/// Since 1.20, nested structures and caps can be specified using brackets (`[`
/// and `]`), for example:
///
/// ```text
/// a-struct, nested=[nested-struct, nested=true]
/// ```
///
/// > *note*: [`to_str()`][Self::to_str()] won't use that syntax for backward
/// > compatibility reason, [`serialize_full()`][Self::serialize_full()] has been added for
/// > that purpose.
#[doc(alias = "GstStructure")]
#[repr(transparent)]
pub struct Structure(ptr::NonNull<ffi::GstStructure>);
unsafe impl Send for Structure {}
unsafe impl Sync for Structure {}

impl Structure {
    #[doc(alias = "gst_structure_new")]
    pub fn builder(name: impl IntoGStr) -> Builder {
        skip_assert_initialized!();
        Builder::new(name)
    }

    #[doc(alias = "gst_structure_new_static_str_empty")]
    pub fn builder_static(name: impl AsRef<GStr> + 'static) -> Builder {
        skip_assert_initialized!();
        Builder::from_static(name)
    }

    #[doc(alias = "gst_structure_new_id_str")]
    pub fn builder_from_id(name: impl AsRef<IdStr>) -> Builder {
        skip_assert_initialized!();
        Builder::from_id(name)
    }

    /// Creates a new, empty [`Structure`][crate::Structure] with the given `name`.
    ///
    /// See `gst_structure_set_name()` for constraints on the `name` parameter.
    ///
    /// Free-function: gst_structure_free
    /// ## `name`
    /// name of new structure
    ///
    /// # Returns
    ///
    /// a new, empty [`Structure`][crate::Structure]
    #[doc(alias = "gst_structure_new_empty")]
    pub fn new_empty(name: impl IntoGStr) -> Structure {
        assert_initialized_main_thread!();
        unsafe {
            let ptr = name.run_with_gstr(|name| ffi::gst_structure_new_empty(name.as_ptr()));
            debug_assert!(!ptr.is_null());
            Structure(ptr::NonNull::new_unchecked(ptr))
        }
    }

    #[doc(alias = "gst_structure_new_static_str_empty")]
    pub fn new_empty_from_static(name: impl AsRef<GStr> + 'static) -> Structure {
        assert_initialized_main_thread!();
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    let ptr =
                        ffi::gst_structure_new_static_str_empty(name.as_ref().as_ptr());
                } else {
                    let ptr = ffi::gst_structure_new_empty(name.as_ref().as_ptr());
                }
            }
            debug_assert!(!ptr.is_null());
            Structure(ptr::NonNull::new_unchecked(ptr))
        }
    }

    #[doc(alias = "gst_structure_new_id_str_empty")]
    pub fn new_empty_from_id(name: impl AsRef<IdStr>) -> Structure {
        assert_initialized_main_thread!();
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    let ptr = ffi::gst_structure_new_id_str_empty(name.as_ref().as_ptr());
                } else {
                    let ptr = ffi::gst_structure_new_empty(name.as_ref().as_gstr().as_ptr());
                }
            }

            debug_assert!(!ptr.is_null());
            Structure(ptr::NonNull::new_unchecked(ptr))
        }
    }

    #[allow(clippy::should_implement_trait)]
    pub fn from_iter<S: IntoGStr>(
        name: impl IntoGStr,
        iter: impl IntoIterator<Item = (S, SendValue)>,
    ) -> Structure {
        skip_assert_initialized!();
        let mut structure = Structure::new_empty(name);

        iter.into_iter()
            .for_each(|(f, v)| structure.set_value(f, v));

        structure
    }

    #[allow(clippy::should_implement_trait)]
    pub fn from_iter_with_static<S: AsRef<GStr> + 'static>(
        name: impl AsRef<GStr> + 'static,
        iter: impl IntoIterator<Item = (S, SendValue)>,
    ) -> Structure {
        skip_assert_initialized!();
        let mut structure = Structure::new_empty_from_static(name);

        iter.into_iter()
            .for_each(|(f, v)| structure.set_value_with_static(f, v));

        structure
    }

    #[allow(clippy::should_implement_trait)]
    pub fn from_iter_with_id<S: AsRef<IdStr>>(
        name: impl AsRef<IdStr>,
        iter: impl IntoIterator<Item = (S, SendValue)>,
    ) -> Structure {
        skip_assert_initialized!();
        let mut structure = Structure::new_empty_from_id(name);

        iter.into_iter()
            .for_each(|(f, v)| structure.set_value_with_id(f, v));

        structure
    }
}

impl IntoGlibPtr<*mut ffi::GstStructure> for Structure {
    #[inline]
    fn into_glib_ptr(self) -> *mut ffi::GstStructure {
        let s = mem::ManuallyDrop::new(self);
        s.0.as_ptr()
    }
}

impl Deref for Structure {
    type Target = StructureRef;

    #[inline]
    fn deref(&self) -> &StructureRef {
        unsafe { &*(self.0.as_ptr() as *const StructureRef) }
    }
}

impl DerefMut for Structure {
    #[inline]
    fn deref_mut(&mut self) -> &mut StructureRef {
        unsafe { &mut *(self.0.as_ptr() as *mut StructureRef) }
    }
}

impl AsRef<StructureRef> for Structure {
    #[inline]
    fn as_ref(&self) -> &StructureRef {
        self.deref()
    }
}

impl AsMut<StructureRef> for Structure {
    #[inline]
    fn as_mut(&mut self) -> &mut StructureRef {
        self.deref_mut()
    }
}

impl Clone for Structure {
    #[inline]
    fn clone(&self) -> Self {
        unsafe {
            let ptr = ffi::gst_structure_copy(self.0.as_ref());
            debug_assert!(!ptr.is_null());
            Structure(ptr::NonNull::new_unchecked(ptr))
        }
    }
}

impl Drop for Structure {
    #[inline]
    fn drop(&mut self) {
        unsafe { ffi::gst_structure_free(self.0.as_mut()) }
    }
}

impl fmt::Debug for Structure {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.debug_tuple("Structure").field(self.as_ref()).finish()
    }
}

impl fmt::Display for Structure {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        // Need to make sure to not call ToString::to_string() here, which
        // we have because of the Display impl. We need StructureRef::to_string()
        f.write_str(&StructureRef::to_string(self.as_ref()))
    }
}

impl PartialEq for Structure {
    fn eq(&self, other: &Structure) -> bool {
        StructureRef::eq(self, other)
    }
}

impl Eq for Structure {}

impl PartialEq<StructureRef> for Structure {
    fn eq(&self, other: &StructureRef) -> bool {
        StructureRef::eq(self, other)
    }
}

impl PartialEq<Structure> for StructureRef {
    fn eq(&self, other: &Structure) -> bool {
        StructureRef::eq(other, self)
    }
}

impl str::FromStr for Structure {
    type Err = glib::BoolError;

    #[doc(alias = "gst_structure_from_string")]
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        assert_initialized_main_thread!();
        unsafe {
            let structure =
                s.run_with_gstr(|s| ffi::gst_structure_from_string(s.as_ptr(), ptr::null_mut()));
            if structure.is_null() {
                Err(glib::bool_error!("Failed to parse structure from string"))
            } else {
                Ok(Self(ptr::NonNull::new_unchecked(structure)))
            }
        }
    }
}

impl Borrow<StructureRef> for Structure {
    #[inline]
    fn borrow(&self) -> &StructureRef {
        self.as_ref()
    }
}

impl BorrowMut<StructureRef> for Structure {
    #[inline]
    fn borrow_mut(&mut self) -> &mut StructureRef {
        self.as_mut()
    }
}

impl ToOwned for StructureRef {
    type Owned = Structure;

    fn to_owned(&self) -> Structure {
        unsafe {
            let ptr = ffi::gst_structure_copy(&self.0);
            debug_assert!(!ptr.is_null());
            Structure(ptr::NonNull::new_unchecked(ptr))
        }
    }
}

impl glib::types::StaticType for Structure {
    #[inline]
    fn static_type() -> glib::types::Type {
        unsafe { from_glib(ffi::gst_structure_get_type()) }
    }
}

impl<'a> ToGlibPtr<'a, *const ffi::GstStructure> for Structure {
    type Storage = PhantomData<&'a Self>;

    #[inline]
    fn to_glib_none(&'a self) -> Stash<'a, *const ffi::GstStructure, Self> {
        unsafe { Stash(self.0.as_ref(), PhantomData) }
    }

    #[inline]
    fn to_glib_full(&self) -> *const ffi::GstStructure {
        unsafe { ffi::gst_structure_copy(self.0.as_ref()) }
    }
}

impl<'a> ToGlibPtr<'a, *mut ffi::GstStructure> for Structure {
    type Storage = PhantomData<&'a Self>;

    #[inline]
    fn to_glib_none(&'a self) -> Stash<'a, *mut ffi::GstStructure, Self> {
        unsafe {
            Stash(
                self.0.as_ref() as *const ffi::GstStructure as *mut ffi::GstStructure,
                PhantomData,
            )
        }
    }

    #[inline]
    fn to_glib_full(&self) -> *mut ffi::GstStructure {
        unsafe { ffi::gst_structure_copy(self.0.as_ref()) }
    }
}

impl<'a> ToGlibPtrMut<'a, *mut ffi::GstStructure> for Structure {
    type Storage = PhantomData<&'a mut Self>;

    #[inline]
    fn to_glib_none_mut(&'a mut self) -> StashMut<'a, *mut ffi::GstStructure, Self> {
        unsafe { StashMut(self.0.as_mut(), PhantomData) }
    }
}

impl FromGlibPtrNone<*const ffi::GstStructure> for Structure {
    #[inline]
    unsafe fn from_glib_none(ptr: *const ffi::GstStructure) -> Self {
        debug_assert!(!ptr.is_null());
        let ptr = ffi::gst_structure_copy(ptr);
        debug_assert!(!ptr.is_null());
        Structure(ptr::NonNull::new_unchecked(ptr))
    }
}

impl FromGlibPtrNone<*mut ffi::GstStructure> for Structure {
    #[inline]
    unsafe fn from_glib_none(ptr: *mut ffi::GstStructure) -> Self {
        debug_assert!(!ptr.is_null());
        let ptr = ffi::gst_structure_copy(ptr);
        debug_assert!(!ptr.is_null());
        Structure(ptr::NonNull::new_unchecked(ptr))
    }
}

impl FromGlibPtrFull<*const ffi::GstStructure> for Structure {
    #[inline]
    unsafe fn from_glib_full(ptr: *const ffi::GstStructure) -> Self {
        debug_assert!(!ptr.is_null());
        Structure(ptr::NonNull::new_unchecked(ptr as *mut ffi::GstStructure))
    }
}

impl FromGlibPtrFull<*mut ffi::GstStructure> for Structure {
    #[inline]
    unsafe fn from_glib_full(ptr: *mut ffi::GstStructure) -> Self {
        debug_assert!(!ptr.is_null());
        Structure(ptr::NonNull::new_unchecked(ptr))
    }
}

impl FromGlibPtrBorrow<*const ffi::GstStructure> for Structure {
    #[inline]
    unsafe fn from_glib_borrow(ptr: *const ffi::GstStructure) -> Borrowed<Self> {
        Borrowed::new(from_glib_full(ptr))
    }
}

impl FromGlibPtrBorrow<*mut ffi::GstStructure> for Structure {
    #[inline]
    unsafe fn from_glib_borrow(ptr: *mut ffi::GstStructure) -> Borrowed<Self> {
        Borrowed::new(from_glib_full(ptr))
    }
}

impl glib::value::ValueType for Structure {
    type Type = Self;
}

impl glib::value::ValueTypeOptional for Structure {}

unsafe impl<'a> glib::value::FromValue<'a> for Structure {
    type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        from_glib_none(
            glib::gobject_ffi::g_value_get_boxed(value.to_glib_none().0) as *mut ffi::GstStructure
        )
    }
}

impl glib::value::ToValue for Structure {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_boxed(
                value.to_glib_none_mut().0,
                glib::translate::ToGlibPtr::<*const ffi::GstStructure>::to_glib_none(self).0
                    as *mut _,
            )
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

impl glib::value::ToValueOptional for Structure {
    fn to_value_optional(s: Option<&Self>) -> glib::Value {
        skip_assert_initialized!();
        let mut value = glib::Value::for_value_type::<Self>();
        unsafe {
            glib::gobject_ffi::g_value_set_boxed(
                value.to_glib_none_mut().0,
                glib::translate::ToGlibPtr::<*const ffi::GstStructure>::to_glib_none(&s).0
                    as *mut _,
            )
        }
        value
    }
}

impl From<Structure> for glib::Value {
    fn from(v: Structure) -> glib::Value {
        skip_assert_initialized!();
        let mut value = glib::Value::for_value_type::<Structure>();
        unsafe {
            glib::gobject_ffi::g_value_take_boxed(
                value.to_glib_none_mut().0,
                glib::translate::IntoGlibPtr::<*mut ffi::GstStructure>::into_glib_ptr(v) as *mut _,
            )
        }
        value
    }
}

impl GlibPtrDefault for Structure {
    type GlibType = *mut ffi::GstStructure;
}

unsafe impl TransparentPtrType for Structure {}

#[repr(transparent)]
#[doc(alias = "GstStructure")]
pub struct StructureRef(ffi::GstStructure);

unsafe impl Send for StructureRef {}
unsafe impl Sync for StructureRef {}

impl StructureRef {
    #[inline]
    pub unsafe fn from_glib_borrow<'a>(ptr: *const ffi::GstStructure) -> &'a StructureRef {
        debug_assert!(!ptr.is_null());

        &*(ptr as *mut StructureRef)
    }

    #[inline]
    pub unsafe fn from_glib_borrow_mut<'a>(ptr: *mut ffi::GstStructure) -> &'a mut StructureRef {
        debug_assert!(!ptr.is_null());
        #[cfg(feature = "v1_28")]
        debug_assert_ne!(ffi::gst_structure_is_writable(ptr), glib::ffi::GFALSE,);

        &mut *(ptr as *mut StructureRef)
    }

    #[inline]
    pub fn as_ptr(&self) -> *const ffi::GstStructure {
        self as *const Self as *const ffi::GstStructure
    }

    #[inline]
    pub fn as_mut_ptr(&self) -> *mut ffi::GstStructure {
        self as *const Self as *mut ffi::GstStructure
    }

    #[doc(alias = "gst_structure_get")]
    pub fn get<'a, T: FromValue<'a>>(
        &'a self,
        name: impl IntoGStr,
    ) -> Result<T, GetError<<<T as FromValue<'a>>::Checker as glib::value::ValueTypeChecker>::Error>>
    {
        name.run_with_gstr(|name| {
            self.value(name)
                .map_err(|err| match err {
                    GetError::FieldNotFound { name } => GetError::FieldNotFound { name },
                    _ => unreachable!(),
                })?
                .get()
                .map_err(|err| GetError::from_value_get_error(IdStr::from(name), err))
        })
    }

    #[doc(alias = "gst_structure_id_str_get")]
    #[inline]
    pub fn get_by_id<'a, T: FromValue<'a>>(
        &'a self,
        name: impl AsRef<IdStr>,
    ) -> Result<T, GetError<<<T as FromValue<'a>>::Checker as glib::value::ValueTypeChecker>::Error>>
    {
        self.value_by_id(name.as_ref())
            .map_err(|err| match err {
                GetError::FieldNotFound { name } => GetError::FieldNotFound { name },
                _ => unreachable!(),
            })?
            .get()
            .map_err(|err| GetError::from_value_get_error(name, err))
    }

    #[doc(alias = "gst_structure_get")]
    pub fn get_optional<'a, T: FromValue<'a>>(
        &'a self,
        name: impl IntoGStr,
    ) -> Result<
        Option<T>,
        GetError<<<T as FromValue<'a>>::Checker as glib::value::ValueTypeChecker>::Error>,
    > {
        name.run_with_gstr(|name| {
            self.value(name)
                .ok()
                .map(|v| v.get())
                .transpose()
                .map_err(|err| GetError::from_value_get_error(IdStr::from(name), err))
        })
    }

    #[doc(alias = "gst_structure_id_str_get")]
    pub fn get_optional_by_id<'a, T: FromValue<'a>>(
        &'a self,
        name: impl AsRef<IdStr>,
    ) -> Result<
        Option<T>,
        GetError<<<T as FromValue<'a>>::Checker as glib::value::ValueTypeChecker>::Error>,
    > {
        self.value_by_id(name.as_ref())
            .ok()
            .map(|v| v.get())
            .transpose()
            .map_err(|err| GetError::from_value_get_error(name, err))
    }

    #[doc(alias = "get_value")]
    #[doc(alias = "gst_structure_get_value")]
    pub fn value(
        &self,
        name: impl IntoGStr,
    ) -> Result<&SendValue, GetError<std::convert::Infallible>> {
        unsafe {
            name.run_with_gstr(|name| {
                let value = ffi::gst_structure_get_value(&self.0, name.as_ptr());

                if value.is_null() {
                    return Err(GetError::new_field_not_found(IdStr::from(name)));
                }

                Ok(&*(value as *const SendValue))
            })
        }
    }

    #[doc(alias = "gst_structure_id_str_get_value")]
    pub fn value_by_id(
        &self,
        name: impl AsRef<IdStr>,
    ) -> Result<&SendValue, GetError<std::convert::Infallible>> {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    let value = ffi::gst_structure_id_str_get_value(&self.0, name.as_ref().as_ptr());
                } else {
                    let value = ffi::gst_structure_get_value(&self.0, name.as_ref().as_gstr().as_ptr());
                }
            }

            if value.is_null() {
                return Err(GetError::new_field_not_found(name));
            }

            Ok(&*(value as *const SendValue))
        }
    }

    #[deprecated = "use `get_by_id()` instead"]
    #[allow(deprecated)]
    #[doc(alias = "gst_structure_id_get")]
    pub fn get_by_quark<'a, T: FromValue<'a>>(
        &'a self,
        name: glib::Quark,
    ) -> Result<T, GetError<<<T as FromValue<'a>>::Checker as glib::value::ValueTypeChecker>::Error>>
    {
        self.value_by_quark(name)
            .map_err(|err| match err {
                GetError::FieldNotFound { name } => GetError::FieldNotFound { name },
                _ => unreachable!(),
            })?
            .get()
            .map_err(|err| GetError::from_value_get_error(IdStr::from(name.as_str()), err))
    }

    #[deprecated = "use `get_optional_by_id()` instead"]
    #[allow(deprecated)]
    #[doc(alias = "gst_structure_id_get")]
    pub fn get_optional_by_quark<'a, T: FromValue<'a>>(
        &'a self,
        name: glib::Quark,
    ) -> Result<
        Option<T>,
        GetError<<<T as FromValue<'a>>::Checker as glib::value::ValueTypeChecker>::Error>,
    > {
        self.value_by_quark(name)
            .ok()
            .map(|v| v.get())
            .transpose()
            .map_err(|err| GetError::from_value_get_error(IdStr::from(name.as_str()), err))
    }

    #[deprecated = "use `value_by_id()` instead"]
    #[doc(alias = "gst_structure_id_get_value")]
    pub fn value_by_quark(
        &self,
        name: glib::Quark,
    ) -> Result<&SendValue, GetError<std::convert::Infallible>> {
        unsafe {
            let value = ffi::gst_structure_id_get_value(&self.0, name.into_glib());

            if value.is_null() {
                return Err(GetError::new_field_not_found(IdStr::from(name.as_str())));
            }

            Ok(&*(value as *const SendValue))
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[doc(alias = "gst_structure_set")]
    pub fn set(&mut self, name: impl IntoGStr, value: impl Into<glib::Value> + Send) {
        let value = glib::SendValue::from_owned(value);
        self.set_value(name, value);
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[doc(alias = "gst_structure_set_static_str")]
    pub fn set_with_static(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        value: impl Into<glib::Value> + Send,
    ) {
        let value = glib::SendValue::from_owned(value);
        self.set_value_with_static(name, value);
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[doc(alias = "gst_structure_id_str_set")]
    pub fn set_with_id(&mut self, name: impl AsRef<IdStr>, value: impl Into<glib::Value> + Send) {
        let value = glib::SendValue::from_owned(value);
        self.set_value_with_id(name, value);
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given `value` if the `predicate` evaluates to `true`.
    ///
    /// This has no effect if the `predicate` evaluates to `false`,
    /// i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set")]
    pub fn set_if(
        &mut self,
        name: impl IntoGStr,
        value: impl Into<glib::Value> + Send,
        predicate: bool,
    ) {
        if predicate {
            self.set(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given `value` if the `predicate` evaluates to `true`.
    ///
    /// This has no effect if the `predicate` evaluates to `false`,
    /// i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set_static_str")]
    pub fn set_with_static_if(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        value: impl Into<glib::Value> + Send,
        predicate: bool,
    ) {
        if predicate {
            self.set_with_static(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given `value` if the `predicate` evaluates to `true`.
    ///
    /// This has no effect if the `predicate` evaluates to `false`,
    /// i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_id_str_set")]
    pub fn set_with_id_if(
        &mut self,
        name: impl AsRef<IdStr>,
        value: impl Into<glib::Value> + Send,
        predicate: bool,
    ) {
        if predicate {
            self.set_with_id(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given inner value if `value` is `Some`.
    ///
    /// This has no effect if the value is `None`, i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set")]
    pub fn set_if_some(
        &mut self,
        name: impl IntoGStr,
        value: Option<impl Into<glib::Value> + Send>,
    ) {
        if let Some(value) = value {
            self.set(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given inner value if `value` is `Some`.
    ///
    /// This has no effect if the value is `None`, i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set_static_str")]
    pub fn set_with_static_if_some(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        value: Option<impl Into<glib::Value> + Send>,
    ) {
        if let Some(value) = value {
            self.set_with_static(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given inner value if `value` is `Some`.
    ///
    /// This has no effect if the value is `None`, i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_id_str_set")]
    pub fn set_with_id_if_some(
        &mut self,
        name: impl AsRef<IdStr>,
        value: Option<impl Into<glib::Value> + Send>,
    ) {
        if let Some(value) = value {
            self.set_with_id(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` using the given `ValueType` `V` built from `iter`'s the `Item`s.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[inline]
    pub fn set_from_iter<
        V: ValueType + Into<Value> + FromIterator<SendValue> + Send,
        I: ToSendValue,
    >(
        &mut self,
        name: impl IntoGStr,
        iter: impl IntoIterator<Item = I>,
    ) {
        let iter = iter.into_iter().map(|item| item.to_send_value());
        self.set(name, V::from_iter(iter));
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` using the given `ValueType` `V` built from `iter`'s the `Item`s.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[inline]
    pub fn set_with_static_from_iter<
        V: ValueType + Into<Value> + FromIterator<SendValue> + Send,
        I: ToSendValue,
    >(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        iter: impl IntoIterator<Item = I>,
    ) {
        let iter = iter.into_iter().map(|item| item.to_send_value());
        self.set_with_static(name, V::from_iter(iter));
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` using the given `ValueType` `V` built from `iter`'s the `Item`s.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[inline]
    pub fn set_with_id_from_iter<
        V: ValueType + Into<Value> + FromIterator<SendValue> + Send,
        I: ToSendValue,
    >(
        &mut self,
        name: impl AsRef<IdStr>,
        iter: impl IntoIterator<Item = I>,
    ) {
        let iter = iter.into_iter().map(|item| item.to_send_value());
        self.set_with_id(name, V::from_iter(iter));
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` using the given `ValueType` `V` built from `iter`'s Item`s,
    /// if `iter` is not empty.
    ///
    /// This has no effect if `iter` is empty, i.e. previous value for `name` is unchanged.
    #[inline]
    pub fn set_if_not_empty<
        V: ValueType + Into<Value> + FromIterator<SendValue> + Send,
        I: ToSendValue,
    >(
        &mut self,
        name: impl IntoGStr,
        iter: impl IntoIterator<Item = I>,
    ) {
        let mut iter = iter.into_iter().peekable();
        if iter.peek().is_some() {
            let iter = iter.map(|item| item.to_send_value());
            self.set(name, V::from_iter(iter));
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` using the given `ValueType` `V` built from `iter`'s Item`s,
    /// if `iter` is not empty.
    ///
    /// This has no effect if `iter` is empty, i.e. previous value for `name` is unchanged.
    #[inline]
    pub fn set_with_static_if_not_empty<
        V: ValueType + Into<Value> + FromIterator<SendValue> + Send,
        I: ToSendValue,
    >(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        iter: impl IntoIterator<Item = I>,
    ) {
        let mut iter = iter.into_iter().peekable();
        if iter.peek().is_some() {
            let iter = iter.map(|item| item.to_send_value());
            self.set_with_static(name, V::from_iter(iter));
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` using the given `ValueType` `V` built from `iter`'s Item`s,
    /// if `iter` is not empty.
    ///
    /// This has no effect if `iter` is empty, i.e. previous value for `name` is unchanged.
    #[inline]
    pub fn set_with_id_if_not_empty<
        V: ValueType + Into<Value> + FromIterator<SendValue> + Send,
        I: ToSendValue,
    >(
        &mut self,
        name: impl AsRef<IdStr>,
        iter: impl IntoIterator<Item = I>,
    ) {
        let mut iter = iter.into_iter().peekable();
        if iter.peek().is_some() {
            let iter = iter.map(|item| item.to_send_value());
            self.set_with_id(name, V::from_iter(iter));
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[doc(alias = "gst_structure_set_value")]
    pub fn set_value(&mut self, name: impl IntoGStr, value: SendValue) {
        unsafe {
            name.run_with_gstr(|name| {
                ffi::gst_structure_take_value(&mut self.0, name.as_ptr(), &mut value.into_raw())
            });
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[doc(alias = "gst_structure_set_value_static_str")]
    pub fn set_value_with_static(&mut self, name: impl AsRef<GStr> + 'static, value: SendValue) {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    ffi::gst_structure_take_value_static_str(
                        &mut self.0,
                        name.as_ref().as_ptr(),
                        &mut value.into_raw(),
                    )
                } else {
                    ffi::gst_structure_take_value(
                        &mut self.0,
                        name.as_ref().as_ptr(),
                        &mut value.into_raw(),
                    )
                }
            }
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[doc(alias = "gst_structure_id_str_set_value")]
    pub fn set_value_with_id(&mut self, name: impl AsRef<IdStr>, value: SendValue) {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    ffi::gst_structure_id_str_take_value(
                        &mut self.0,
                        name.as_ref().as_ptr(),
                        &mut value.into_raw(),
                    )
                } else {
                    ffi::gst_structure_take_value(
                        &mut self.0,
                        name.as_ref().as_gstr().as_ptr(),
                        &mut value.into_raw(),
                    )
                }
            }
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given `value` if the `predicate` evaluates to `true`.
    ///
    /// This has no effect if the `predicate` evaluates to `false`,
    /// i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set_value")]
    pub fn set_value_if(&mut self, name: impl IntoGStr, value: SendValue, predicate: bool) {
        if predicate {
            self.set_value(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given `value` if the `predicate` evaluates to `true`.
    ///
    /// This has no effect if the `predicate` evaluates to `false`,
    /// i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set_value_static_str")]
    pub fn set_value_with_static_if(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        value: SendValue,
        predicate: bool,
    ) {
        if predicate {
            self.set_value_with_static(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given `value` if the `predicate` evaluates to `true`.
    ///
    /// This has no effect if the `predicate` evaluates to `false`,
    /// i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_id_str_set_value")]
    pub fn set_value_with_id_if(
        &mut self,
        name: impl AsRef<IdStr>,
        value: SendValue,
        predicate: bool,
    ) {
        if predicate {
            self.set_value_with_id(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given inner value if `value` is `Some`.
    ///
    /// This has no effect if the value is `None`, i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set_value")]
    pub fn set_value_if_some(&mut self, name: impl IntoGStr, value: Option<SendValue>) {
        if let Some(value) = value {
            self.set_value(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given inner value if `value` is `Some`.
    ///
    /// This has no effect if the value is `None`, i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_set_value_static_str")]
    pub fn set_value_with_static_if_some(
        &mut self,
        name: impl AsRef<GStr> + 'static,
        value: Option<SendValue>,
    ) {
        if let Some(value) = value {
            self.set_value_with_static(name, value);
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given inner value if `value` is `Some`.
    ///
    /// This has no effect if the value is `None`, i.e. default or previous value for `name` is kept.
    #[doc(alias = "gst_structure_id_str_set_value")]
    pub fn set_value_with_id_if_some(&mut self, name: impl AsRef<IdStr>, value: Option<SendValue>) {
        if let Some(value) = value {
            self.set_value_with_id(name, value);
        }
    }

    #[deprecated = "use `set_by_id()` instead"]
    #[allow(deprecated)]
    #[doc(alias = "gst_structure_id_set")]
    pub fn set_by_quark(&mut self, name: glib::Quark, value: impl Into<glib::Value> + Send) {
        let value = glib::SendValue::from_owned(value);
        self.set_value_by_quark(name, value);
    }

    #[deprecated = "use `set_by_id_if_some()` instead"]
    #[allow(deprecated)]
    #[doc(alias = "gst_structure_id_set")]
    pub fn set_by_quark_if_some(
        &mut self,
        name: glib::Quark,
        value: Option<impl Into<glib::Value> + Send>,
    ) {
        if let Some(value) = value {
            self.set_by_quark(name, value);
        }
    }

    #[deprecated = "use `set_by_id_value()` instead"]
    #[doc(alias = "gst_structure_id_set_value")]
    pub fn set_value_by_quark(&mut self, name: glib::Quark, value: SendValue) {
        unsafe {
            ffi::gst_structure_id_take_value(&mut self.0, name.into_glib(), &mut value.into_raw());
        }
    }

    #[deprecated = "use `set_by_id_value_if_some()` instead"]
    #[allow(deprecated)]
    #[doc(alias = "gst_structure_id_set_value")]
    pub fn set_value_by_quark_if_some(&mut self, name: glib::Quark, value: Option<SendValue>) {
        if let Some(value) = value {
            self.set_value_by_quark(name, value);
        }
    }

    #[doc(alias = "get_name")]
    #[doc(alias = "gst_structure_get_name")]
    pub fn name(&self) -> &glib::GStr {
        unsafe { glib::GStr::from_ptr(ffi::gst_structure_get_name(&self.0)) }
    }

    #[cfg(feature = "v1_26")]
    #[doc(alias = "get_name")]
    #[doc(alias = "gst_structure_get_name_id_str")]
    pub fn name_id(&self) -> &IdStr {
        unsafe { &*(ffi::gst_structure_get_name_id_str(&self.0) as *const crate::IdStr) }
    }

    #[deprecated = "use `name()` instead, or `name_id()` with feature v1_26"]
    #[doc(alias = "gst_structure_get_name_id")]
    pub fn name_quark(&self) -> glib::Quark {
        unsafe { from_glib(ffi::gst_structure_get_name_id(&self.0)) }
    }

    #[doc(alias = "gst_structure_set_name")]
    pub fn set_name(&mut self, name: impl IntoGStr) {
        unsafe {
            name.run_with_gstr(|name| ffi::gst_structure_set_name(&mut self.0, name.as_ptr()))
        }
    }

    #[doc(alias = "gst_structure_set_name_static_str")]
    pub fn set_name_from_static(&mut self, name: impl AsRef<GStr> + 'static) {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    ffi::gst_structure_set_name_static_str(
                        &mut self.0,
                        name.as_ref().as_ptr(),
                    )
                } else {
                    ffi::gst_structure_set_name(&mut self.0, name.as_ref().as_ptr())
                }
            }
        }
    }

    #[doc(alias = "gst_structure_set_name_id_str")]
    pub fn set_name_from_id(&mut self, name: impl AsRef<IdStr>) {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    ffi::gst_structure_set_name_id_str(
                        &mut self.0,
                        name.as_ref().as_ptr(),
                    )
                } else {
                    ffi::gst_structure_set_name(&mut self.0, name.as_ref().as_gstr().as_ptr())
                }
            }
        }
    }

    #[doc(alias = "gst_structure_set_name")]
    pub fn set_name_if_some(&mut self, name: Option<impl IntoGStr>) {
        if let Some(name) = name {
            self.set_name(name);
        }
    }

    #[doc(alias = "gst_structure_set_name_static_str")]
    pub fn set_name_from_static_if_some(&mut self, name: Option<impl AsRef<GStr> + 'static>) {
        if let Some(name) = name {
            self.set_name_from_static(name);
        }
    }

    #[doc(alias = "gst_structure_set_name_id_str")]
    pub fn set_name_from_id_if_some(&mut self, name: Option<impl AsRef<IdStr>>) {
        if let Some(name) = name {
            self.set_name_from_id(name);
        }
    }

    #[doc(alias = "gst_structure_has_name")]
    pub fn has_name(&self, name: &str) -> bool {
        self.name() == name
    }

    #[doc(alias = "gst_structure_has_field")]
    pub fn has_field(&self, field: impl IntoGStr) -> bool {
        unsafe {
            field.run_with_gstr(|field| {
                from_glib(ffi::gst_structure_has_field(&self.0, field.as_ptr()))
            })
        }
    }

    #[doc(alias = "gst_structure_id_str_has_field")]
    pub fn has_field_by_id(&self, field: impl AsRef<IdStr>) -> bool {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    from_glib(ffi::gst_structure_id_str_has_field(
                        &self.0,
                        field.as_ref().as_ptr(),
                    ))
                } else {
                    from_glib(ffi::gst_structure_has_field(
                        &self.0,
                        field.as_ref().as_gstr().as_ptr(),
                    ))
                }
            }
        }
    }

    #[doc(alias = "gst_structure_has_field_typed")]
    pub fn has_field_with_type(&self, field: impl IntoGStr, type_: glib::Type) -> bool {
        unsafe {
            field.run_with_gstr(|field| {
                from_glib(ffi::gst_structure_has_field_typed(
                    &self.0,
                    field.as_ptr(),
                    type_.into_glib(),
                ))
            })
        }
    }

    #[doc(alias = "gst_structure_id_str_has_field_typed")]
    pub fn has_field_with_type_by_id(&self, field: impl AsRef<IdStr>, type_: glib::Type) -> bool {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    from_glib(ffi::gst_structure_id_str_has_field_typed(
                        &self.0,
                        field.as_ref().as_ptr(),
                        type_.into_glib(),
                    ))
                } else {
                    from_glib(ffi::gst_structure_has_field_typed(
                        &self.0,
                        field.as_ref().as_gstr().as_ptr(),
                        type_.into_glib(),
                    ))
                }
            }
        }
    }

    #[deprecated = "use `has_field_by_id()`"]
    #[doc(alias = "gst_structure_id_has_field")]
    pub fn has_field_by_quark(&self, field: glib::Quark) -> bool {
        unsafe { from_glib(ffi::gst_structure_id_has_field(&self.0, field.into_glib())) }
    }

    #[deprecated = "use `has_field_with_type_by_id()`"]
    #[doc(alias = "gst_structure_id_has_field_typed")]
    pub fn has_field_with_type_by_quark(&self, field: glib::Quark, type_: glib::Type) -> bool {
        unsafe {
            from_glib(ffi::gst_structure_id_has_field_typed(
                &self.0,
                field.into_glib(),
                type_.into_glib(),
            ))
        }
    }

    #[doc(alias = "gst_structure_remove_field")]
    pub fn remove_field(&mut self, field: impl IntoGStr) {
        unsafe {
            field.run_with_gstr(|field| {
                ffi::gst_structure_remove_field(&mut self.0, field.as_ptr())
            });
        }
    }

    #[doc(alias = "gst_structure_remove_fields")]
    pub fn remove_fields<S: IntoGStr>(&mut self, fields: impl IntoIterator<Item = S>) {
        for f in fields.into_iter() {
            self.remove_field(f)
        }
    }

    #[doc(alias = "gst_structure_id_str_remove_field")]
    pub fn remove_field_by_id(&mut self, field: impl AsRef<IdStr>) {
        unsafe {
            cfg_if! {
                if #[cfg(feature = "v1_26")] {
                    ffi::gst_structure_id_str_remove_field(&mut self.0, field.as_ref().as_ptr())
                } else {
                    ffi::gst_structure_remove_field(&mut self.0, field.as_ref().as_gstr().as_ptr())
                }
            }
        }
    }

    #[doc(alias = "gst_structure_id_str_remove_fields")]
    pub fn remove_field_by_ids<S: AsRef<IdStr>>(&mut self, fields: impl IntoIterator<Item = S>) {
        for f in fields.into_iter() {
            self.remove_field_by_id(f)
        }
    }

    #[doc(alias = "gst_structure_remove_all_fields")]
    pub fn remove_all_fields(&mut self) {
        unsafe {
            ffi::gst_structure_remove_all_fields(&mut self.0);
        }
    }

    pub fn fields(&self) -> FieldIterator {
        FieldIterator::new(self)
    }

    pub fn iter(&self) -> Iter {
        Iter::new(self)
    }

    #[cfg(feature = "v1_26")]
    pub fn field_ids(&self) -> FieldIdIterator {
        FieldIdIterator::new(self)
    }

    #[cfg(feature = "v1_26")]
    pub fn id_iter(&self) -> IdIter {
        IdIter::new(self)
    }

    #[doc(alias = "get_nth_field_name")]
    #[doc(alias = "gst_structure_nth_field_name")]
    pub fn nth_field_name(&self, idx: usize) -> Option<&glib::GStr> {
        if idx >= self.n_fields() {
            return None;
        }

        unsafe {
            let field_name = ffi::gst_structure_nth_field_name(&self.0, idx as u32);
            debug_assert!(!field_name.is_null());

            Some(glib::GStr::from_ptr(field_name))
        }
    }

    #[cfg(feature = "v1_26")]
    #[doc(alias = "get_nth_field_name")]
    #[doc(alias = "gst_structure_id_str_nth_field_name")]
    pub fn nth_field_by_id(&self, idx: usize) -> Option<&IdStr> {
        if idx >= self.n_fields() {
            return None;
        }

        unsafe {
            let field_name = ffi::gst_structure_id_str_nth_field_name(&self.0, idx as u32);
            debug_assert!(!field_name.is_null());

            Some(&*(field_name as *const crate::IdStr))
        }
    }

    #[doc(alias = "gst_structure_n_fields")]
    pub fn n_fields(&self) -> usize {
        unsafe { ffi::gst_structure_n_fields(&self.0) as usize }
    }

    pub fn len(&self) -> usize {
        self.n_fields()
    }

    pub fn is_empty(&self) -> bool {
        self.n_fields() == 0
    }

    #[doc(alias = "gst_structure_can_intersect")]
    pub fn can_intersect(&self, other: &StructureRef) -> bool {
        unsafe { from_glib(ffi::gst_structure_can_intersect(&self.0, &other.0)) }
    }

    #[doc(alias = "gst_structure_intersect")]
    pub fn intersect(&self, other: &StructureRef) -> Option<Structure> {
        unsafe { from_glib_full(ffi::gst_structure_intersect(&self.0, &other.0)) }
    }

    #[doc(alias = "gst_structure_is_subset")]
    pub fn is_subset(&self, superset: &StructureRef) -> bool {
        unsafe { from_glib(ffi::gst_structure_is_subset(&self.0, &superset.0)) }
    }

    #[doc(alias = "gst_structure_fixate")]
    pub fn fixate(&mut self) {
        unsafe { ffi::gst_structure_fixate(&mut self.0) }
    }

    #[doc(alias = "gst_structure_fixate_field")]
    pub fn fixate_field(&mut self, name: impl IntoGStr) -> bool {
        unsafe {
            name.run_with_gstr(|name| {
                from_glib(ffi::gst_structure_fixate_field(&mut self.0, name.as_ptr()))
            })
        }
    }

    #[doc(alias = "gst_structure_fixate_field_boolean")]
    pub fn fixate_field_bool(&mut self, name: impl IntoGStr, target: bool) -> bool {
        unsafe {
            name.run_with_gstr(|name| {
                from_glib(ffi::gst_structure_fixate_field_boolean(
                    &mut self.0,
                    name.as_ptr(),
                    target.into_glib(),
                ))
            })
        }
    }

    #[doc(alias = "gst_structure_fixate_field_string")]
    pub fn fixate_field_str(&mut self, name: impl IntoGStr, target: impl IntoGStr) -> bool {
        unsafe {
            name.run_with_gstr(|name| {
                target.run_with_gstr(|target| {
                    from_glib(ffi::gst_structure_fixate_field_string(
                        &mut self.0,
                        name.as_ptr(),
                        target.as_ptr(),
                    ))
                })
            })
        }
    }

    #[doc(alias = "gst_structure_fixate_field_nearest_double")]
    pub fn fixate_field_nearest_double(&mut self, name: impl IntoGStr, target: f64) -> bool {
        unsafe {
            name.run_with_gstr(|name| {
                from_glib(ffi::gst_structure_fixate_field_nearest_double(
                    &mut self.0,
                    name.as_ptr(),
                    target,
                ))
            })
        }
    }

    #[doc(alias = "gst_structure_fixate_field_nearest_fraction")]
    pub fn fixate_field_nearest_fraction(
        &mut self,
        name: impl IntoGStr,
        target: impl Into<Fraction>,
    ) -> bool {
        skip_assert_initialized!();

        let target = target.into();
        unsafe {
            name.run_with_gstr(|name| {
                from_glib(ffi::gst_structure_fixate_field_nearest_fraction(
                    &mut self.0,
                    name.as_ptr(),
                    target.numer(),
                    target.denom(),
                ))
            })
        }
    }

    #[doc(alias = "gst_structure_fixate_field_nearest_int")]
    pub fn fixate_field_nearest_int(&mut self, name: impl IntoGStr, target: i32) -> bool {
        unsafe {
            name.run_with_gstr(|name| {
                from_glib(ffi::gst_structure_fixate_field_nearest_int(
                    &mut self.0,
                    name.as_ptr(),
                    target,
                ))
            })
        }
    }

    #[cfg(feature = "v1_20")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_20")))]
    #[doc(alias = "gst_structure_serialize")]
    pub fn serialize(&self, flags: crate::SerializeFlags) -> glib::GString {
        unsafe { from_glib_full(ffi::gst_structure_serialize(&self.0, flags.into_glib())) }
    }

    #[cfg(feature = "v1_24")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_24")))]
    #[doc(alias = "gst_structure_serialize")]
    #[doc(alias = "gst_structure_serialize_full")]
    pub fn serialize_strict(
        &self,
        flags: crate::SerializeFlags,
    ) -> Result<glib::GString, glib::BoolError> {
        unsafe {
            let res = ffi::gst_structure_serialize_full(
                &self.0,
                flags.into_glib() | ffi::GST_SERIALIZE_FLAG_STRICT,
            );
            if res.is_null() {
                Err(glib::bool_error!("Failed to serialize structure to string"))
            } else {
                Ok(from_glib_full(res))
            }
        }
    }

    #[deprecated = "Use `iter()` instead, or `id_iter()` with feature v1_26"]
    #[doc(alias = "gst_structure_foreach")]
    pub fn foreach<F: FnMut(glib::Quark, &glib::Value) -> std::ops::ControlFlow<()>>(
        &self,
        mut func: F,
    ) -> bool {
        unsafe {
            unsafe extern "C" fn trampoline<
                F: FnMut(glib::Quark, &glib::Value) -> std::ops::ControlFlow<()>,
            >(
                quark: glib::ffi::GQuark,
                value: *const glib::gobject_ffi::GValue,
                user_data: glib::ffi::gpointer,
            ) -> glib::ffi::gboolean {
                let func = &mut *(user_data as *mut F);
                let res = func(from_glib(quark), &*(value as *const glib::Value));

                matches!(res, std::ops::ControlFlow::Continue(_)).into_glib()
            }
            let func = &mut func as *mut F;
            from_glib(ffi::gst_structure_foreach(
                self.as_ptr(),
                Some(trampoline::<F>),
                func as glib::ffi::gpointer,
            ))
        }
    }

    #[cfg(feature = "v1_26")]
    // rustdoc-stripper-ignore-next
    /// Executes the provided `func` on each field, possibly modifying the value.
    #[doc(alias = "gst_structure_map_in_place_id_str")]
    pub fn map_in_place_by_id<F: FnMut(&IdStr, &mut glib::Value) -> std::ops::ControlFlow<()>>(
        &mut self,
        mut func: F,
    ) {
        unsafe {
            unsafe extern "C" fn trampoline<
                F: FnMut(&IdStr, &mut glib::Value) -> std::ops::ControlFlow<()>,
            >(
                fieldname: *const ffi::GstIdStr,
                value: *mut glib::gobject_ffi::GValue,
                user_data: glib::ffi::gpointer,
            ) -> glib::ffi::gboolean {
                let func = &mut *(user_data as *mut F);
                let res = func(
                    &*(fieldname as *const IdStr),
                    &mut *(value as *mut glib::Value),
                );

                matches!(res, std::ops::ControlFlow::Continue(_)).into_glib()
            }
            let func = &mut func as *mut F;
            let _ = ffi::gst_structure_map_in_place_id_str(
                self.as_mut_ptr(),
                Some(trampoline::<F>),
                func as glib::ffi::gpointer,
            );
        }
    }

    #[cfg(feature = "v1_26")]
    // rustdoc-stripper-ignore-next
    /// Executes the provided `func` on each field with an owned value.
    ///
    /// * If `func` returns `Some(value)`, the field's value is replaced with
    ///   `value`.
    /// * If `func` returns `None`, the field is removed.
    #[doc(alias = "gst_structure_filter_and_map_in_place_id_str")]
    pub fn filter_map_in_place_by_id<F: FnMut(&IdStr, glib::Value) -> Option<glib::Value>>(
        &mut self,
        mut func: F,
    ) {
        unsafe {
            unsafe extern "C" fn trampoline<
                F: FnMut(&IdStr, glib::Value) -> Option<glib::Value>,
            >(
                fieldname: *const ffi::GstIdStr,
                value: *mut glib::gobject_ffi::GValue,
                user_data: glib::ffi::gpointer,
            ) -> glib::ffi::gboolean {
                let func = &mut *(user_data as *mut F);

                let v = mem::replace(
                    &mut *(value as *mut glib::Value),
                    glib::Value::uninitialized(),
                );
                match func(&*(fieldname as *const IdStr), v) {
                    None => glib::ffi::GFALSE,
                    Some(v) => {
                        *value = v.into_raw();
                        glib::ffi::GTRUE
                    }
                }
            }

            let func = &mut func as *mut F;
            ffi::gst_structure_filter_and_map_in_place_id_str(
                self.as_mut_ptr(),
                Some(trampoline::<F>),
                func as glib::ffi::gpointer,
            );
        }
    }

    // rustdoc-stripper-ignore-next
    /// Executes the provided `func` on each field, possibly modifying the value,
    /// as long as `ControlFlow::Continue(())` is returned.
    ///
    /// Using `Quark`s is deprecated, however this method is kept because there
    /// are no other means to achieve this pre-GStreamer-1.26. With feature v1_26,
    /// use [map_in_place_by_id] instead.
    ///
    /// # Returns:
    ///
    /// * `ControlFlow::Continue(())` if `func` returned this for all fields,
    /// * `ControlFlow::Break(())` otherwise.
    ///
    /// [map_in_place_by_id]: crate::StructureRef::map_in_place_by_id
    #[doc(alias = "gst_structure_map_in_place")]
    pub fn map_in_place<F: FnMut(glib::Quark, &mut glib::Value) -> std::ops::ControlFlow<()>>(
        &mut self,
        mut func: F,
    ) -> std::ops::ControlFlow<()> {
        unsafe {
            unsafe extern "C" fn trampoline<
                F: FnMut(glib::Quark, &mut glib::Value) -> std::ops::ControlFlow<()>,
            >(
                quark: glib::ffi::GQuark,
                value: *mut glib::gobject_ffi::GValue,
                user_data: glib::ffi::gpointer,
            ) -> glib::ffi::gboolean {
                let func = &mut *(user_data as *mut F);
                let res = func(from_glib(quark), &mut *(value as *mut glib::Value));

                matches!(res, std::ops::ControlFlow::Continue(_)).into_glib()
            }
            let func = &mut func as *mut F;
            if from_glib(ffi::gst_structure_map_in_place(
                self.as_mut_ptr(),
                Some(trampoline::<F>),
                func as glib::ffi::gpointer,
            )) {
                std::ops::ControlFlow::Continue(())
            } else {
                std::ops::ControlFlow::Break(())
            }
        }
    }

    // rustdoc-stripper-ignore-next
    /// Executes the provided `func` on each field with an owned value.
    ///
    /// * If `func` returns `Some(value)`, the field's value is replaced with
    ///   `value`.
    /// * If `func` returns `None`, the field is removed.
    ///
    /// Using `Quark`s is deprecated, however this method is kept because there
    /// are no other means to achieve this pre-GStreamer-1.26. With feature v1_26,
    /// use [filter_map_in_place_by_id] instead.
    ///
    /// [filter_map_in_place_by_id]: crate::StructureRef::filter_map_in_place_by_id
    #[doc(alias = "gst_structure_filter_and_map_in_place")]
    pub fn filter_map_in_place<F: FnMut(glib::Quark, glib::Value) -> Option<glib::Value>>(
        &mut self,
        mut func: F,
    ) {
        unsafe {
            unsafe extern "C" fn trampoline<
                F: FnMut(glib::Quark, glib::Value) -> Option<glib::Value>,
            >(
                quark: glib::ffi::GQuark,
                value: *mut glib::gobject_ffi::GValue,
                user_data: glib::ffi::gpointer,
            ) -> glib::ffi::gboolean {
                let func = &mut *(user_data as *mut F);

                let v = mem::replace(
                    &mut *(value as *mut glib::Value),
                    glib::Value::uninitialized(),
                );
                match func(from_glib(quark), v) {
                    None => glib::ffi::GFALSE,
                    Some(v) => {
                        *value = v.into_raw();
                        glib::ffi::GTRUE
                    }
                }
            }

            let func = &mut func as *mut F;
            ffi::gst_structure_filter_and_map_in_place(
                self.as_mut_ptr(),
                Some(trampoline::<F>),
                func as glib::ffi::gpointer,
            );
        }
    }
}

impl fmt::Display for StructureRef {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let s = unsafe { glib::GString::from_glib_full(ffi::gst_structure_to_string(&self.0)) };
        f.write_str(&s)
    }
}

impl fmt::Debug for StructureRef {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let mut debug = f.debug_struct(self.name());

        for (id, field) in self.iter() {
            if field.type_() == Structure::static_type() {
                let s = field.get::<Structure>().unwrap();
                debug.field(id, &s);
            } else if field.type_() == crate::Array::static_type() {
                let arr = field.get::<crate::Array>().unwrap();
                debug.field(id, &arr);
            } else if field.type_() == crate::List::static_type() {
                let list = field.get::<crate::List>().unwrap();
                debug.field(id, &list);
            } else {
                debug.field(id, &field);
            }
        }

        debug.finish()
    }
}

impl PartialEq for StructureRef {
    #[doc(alias = "gst_structure_is_equal")]
    fn eq(&self, other: &StructureRef) -> bool {
        unsafe { from_glib(ffi::gst_structure_is_equal(&self.0, &other.0)) }
    }
}

impl Eq for StructureRef {}

impl glib::types::StaticType for StructureRef {
    #[inline]
    fn static_type() -> glib::types::Type {
        unsafe { from_glib(ffi::gst_structure_get_type()) }
    }
}

unsafe impl<'a> glib::value::FromValue<'a> for &'a StructureRef {
    type Checker = glib::value::GenericValueTypeOrNoneChecker<Self>;

    unsafe fn from_value(value: &'a glib::Value) -> Self {
        skip_assert_initialized!();
        &*(glib::gobject_ffi::g_value_get_boxed(value.to_glib_none().0) as *const StructureRef)
    }
}

impl glib::value::ToValue for StructureRef {
    fn to_value(&self) -> glib::Value {
        let mut value = glib::Value::for_value_type::<Structure>();
        unsafe {
            glib::gobject_ffi::g_value_set_boxed(
                value.to_glib_none_mut().0,
                self.as_ptr() as *mut _,
            )
        }
        value
    }

    fn value_type(&self) -> glib::Type {
        Self::static_type()
    }
}

impl glib::value::ToValueOptional for StructureRef {
    fn to_value_optional(s: Option<&Self>) -> glib::Value {
        skip_assert_initialized!();
        let mut value = glib::Value::for_value_type::<Structure>();
        unsafe {
            glib::gobject_ffi::g_value_set_boxed(
                value.to_glib_none_mut().0,
                s.map(|s| s.as_ptr()).unwrap_or(ptr::null()) as *mut _,
            )
        }
        value
    }
}

crate::utils::define_fixed_size_iter!(
    FieldIterator,
    &'a StructureRef,
    &'a glib::GStr,
    |collection: &StructureRef| collection.n_fields(),
    |collection: &StructureRef, idx: usize| unsafe {
        let field_name = ffi::gst_structure_nth_field_name(&collection.0, idx as u32);
        glib::GStr::from_ptr(field_name)
    }
);

#[cfg(feature = "v1_26")]
crate::utils::define_fixed_size_iter!(
    FieldIdIterator,
    &'a StructureRef,
    &'a crate::IdStr,
    |collection: &StructureRef| collection.n_fields(),
    |collection: &StructureRef, idx: usize| unsafe {
        let field_name = ffi::gst_structure_id_str_nth_field_name(&collection.0, idx as u32);
        debug_assert!(!field_name.is_null());

        &*(field_name as *const crate::IdStr)
    }
);

#[must_use = "iterators are lazy and do nothing unless consumed"]
#[derive(Debug)]
pub struct Iter<'a> {
    iter: FieldIterator<'a>,
}

impl<'a> Iter<'a> {
    fn new(structure: &'a StructureRef) -> Iter<'a> {
        skip_assert_initialized!();
        Iter {
            iter: FieldIterator::new(structure),
        }
    }
}

impl<'a> Iterator for Iter<'a> {
    type Item = (&'a glib::GStr, &'a SendValue);

    fn next(&mut self) -> Option<Self::Item> {
        let f = self.iter.next()?;
        let v = self.iter.collection.value(f);
        Some((f, v.unwrap()))
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        self.iter.size_hint()
    }

    fn count(self) -> usize {
        self.iter.count()
    }

    fn nth(&mut self, n: usize) -> Option<Self::Item> {
        let f = self.iter.nth(n)?;
        let v = self.iter.collection.value(f);
        Some((f, v.unwrap()))
    }

    fn last(self) -> Option<Self::Item> {
        let structure = self.iter.collection;
        let f = self.iter.last()?;
        let v = structure.value(f);
        Some((f, v.unwrap()))
    }
}

impl DoubleEndedIterator for Iter<'_> {
    fn next_back(&mut self) -> Option<Self::Item> {
        let f = self.iter.next_back()?;
        let v = self.iter.collection.value(f);
        Some((f, v.unwrap()))
    }

    fn nth_back(&mut self, n: usize) -> Option<Self::Item> {
        let f = self.iter.nth_back(n)?;
        let v = self.iter.collection.value(f);
        Some((f, v.unwrap()))
    }
}

impl ExactSizeIterator for Iter<'_> {}

impl std::iter::FusedIterator for Iter<'_> {}

#[cfg(feature = "v1_26")]
#[must_use = "iterators are lazy and do nothing unless consumed"]
#[derive(Debug)]
pub struct IdIter<'a> {
    iter: FieldIdIterator<'a>,
}

#[cfg(feature = "v1_26")]
impl<'a> IdIter<'a> {
    fn new(structure: &'a StructureRef) -> IdIter<'a> {
        skip_assert_initialized!();
        IdIter {
            iter: FieldIdIterator::new(structure),
        }
    }
}

#[cfg(feature = "v1_26")]
impl<'a> Iterator for IdIter<'a> {
    type Item = (&'a IdStr, &'a SendValue);

    fn next(&mut self) -> Option<Self::Item> {
        let f = self.iter.next()?;
        let v = self.iter.collection.value_by_id(f);
        Some((f, v.unwrap()))
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        self.iter.size_hint()
    }

    fn count(self) -> usize {
        self.iter.count()
    }

    fn nth(&mut self, n: usize) -> Option<Self::Item> {
        let f = self.iter.nth(n)?;
        let v = self.iter.collection.value_by_id(f);
        Some((f, v.unwrap()))
    }

    fn last(self) -> Option<Self::Item> {
        let structure = self.iter.collection;
        let f = self.iter.last()?;
        let v = structure.value_by_id(f);
        Some((f, v.unwrap()))
    }
}

#[cfg(feature = "v1_26")]
impl DoubleEndedIterator for IdIter<'_> {
    fn next_back(&mut self) -> Option<Self::Item> {
        let f = self.iter.next_back()?;
        let v = self.iter.collection.value_by_id(f);
        Some((f, v.unwrap()))
    }

    fn nth_back(&mut self, n: usize) -> Option<Self::Item> {
        let f = self.iter.nth_back(n)?;
        let v = self.iter.collection.value_by_id(f);
        Some((f, v.unwrap()))
    }
}

#[cfg(feature = "v1_26")]
impl ExactSizeIterator for IdIter<'_> {}
#[cfg(feature = "v1_26")]
impl std::iter::FusedIterator for IdIter<'_> {}

impl<'a> IntoIterator for &'a StructureRef {
    type IntoIter = Iter<'a>;
    type Item = (&'a glib::GStr, &'a SendValue);

    fn into_iter(self) -> Self::IntoIter {
        self.iter()
    }
}

impl<'a> std::iter::Extend<(&'a str, SendValue)> for StructureRef {
    fn extend<T: IntoIterator<Item = (&'a str, SendValue)>>(&mut self, iter: T) {
        iter.into_iter().for_each(|(f, v)| self.set_value(f, v));
    }
}

impl<'a> std::iter::Extend<(&'a glib::GStr, SendValue)> for StructureRef {
    fn extend<T: IntoIterator<Item = (&'a glib::GStr, SendValue)>>(&mut self, iter: T) {
        iter.into_iter().for_each(|(f, v)| self.set_value(f, v));
    }
}

impl std::iter::Extend<(String, SendValue)> for StructureRef {
    fn extend<T: IntoIterator<Item = (String, SendValue)>>(&mut self, iter: T) {
        iter.into_iter().for_each(|(f, v)| self.set_value(&f, v));
    }
}

impl std::iter::Extend<(glib::GString, SendValue)> for StructureRef {
    fn extend<T: IntoIterator<Item = (glib::GString, SendValue)>>(&mut self, iter: T) {
        iter.into_iter().for_each(|(f, v)| self.set_value(&f, v));
    }
}

impl<'a> std::iter::Extend<(&'a IdStr, SendValue)> for StructureRef {
    #[allow(deprecated)]
    fn extend<T: IntoIterator<Item = (&'a IdStr, SendValue)>>(&mut self, iter: T) {
        iter.into_iter()
            .for_each(|(f, v)| self.set_value_with_id(f, v));
    }
}

impl std::iter::Extend<(IdStr, SendValue)> for StructureRef {
    #[allow(deprecated)]
    fn extend<T: IntoIterator<Item = (IdStr, SendValue)>>(&mut self, iter: T) {
        iter.into_iter()
            .for_each(|(f, v)| self.set_value_with_id(f, v));
    }
}

impl std::iter::Extend<(glib::Quark, SendValue)> for StructureRef {
    #[allow(deprecated)]
    fn extend<T: IntoIterator<Item = (glib::Quark, SendValue)>>(&mut self, iter: T) {
        iter.into_iter()
            .for_each(|(f, v)| self.set_value_by_quark(f, v));
    }
}

// Need gst_value_hash from 1.28
#[cfg(feature = "v1_28")]
impl std::hash::Hash for StructureRef {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        use crate::value::GstValueExt;
        use std::hash::{DefaultHasher, Hasher};

        let name = self.name();
        name.hash(state);

        // re-implement gst_hash_structure() so the hashing is not depending on the fields order.
        let mut fields_hash = 0;
        for (field, value) in self.iter() {
            let mut field_hasher = DefaultHasher::new();
            field.hash(&mut field_hasher);
            let value_hash = value.hash().unwrap();
            value_hash.hash(&mut field_hasher);

            fields_hash ^= field_hasher.finish();
        }
        fields_hash.hash(state);
    }
}

#[cfg(feature = "v1_28")]
impl std::hash::Hash for Structure {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        self.as_ref().hash(state);
    }
}

#[derive(Debug)]
#[must_use = "The builder must be built to be used"]
pub struct Builder {
    s: Structure,
}

impl Builder {
    fn new(name: impl IntoGStr) -> Self {
        skip_assert_initialized!();
        Builder {
            s: Structure::new_empty(name),
        }
    }

    fn from_static(name: impl AsRef<GStr> + 'static) -> Self {
        skip_assert_initialized!();
        Builder {
            s: Structure::new_empty_from_static(name),
        }
    }

    pub fn from_id(name: impl AsRef<IdStr>) -> Builder {
        skip_assert_initialized!();
        Builder {
            s: Structure::new_empty_from_id(name),
        }
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[inline]
    pub fn field(mut self, name: impl IntoGStr, value: impl Into<glib::Value> + Send) -> Self {
        self.s.set(name, value);
        self
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[inline]
    pub fn field_with_static(
        mut self,
        name: impl AsRef<GStr> + 'static,
        value: impl Into<glib::Value> + Send,
    ) -> Self {
        self.s.set_with_static(name, value);
        self
    }

    // rustdoc-stripper-ignore-next
    /// Sets field `name` to the given value `value`.
    ///
    /// Overrides any default or previously defined value for `name`.
    #[inline]
    pub fn field_with_id(
        mut self,
        name: impl AsRef<IdStr>,
        value: impl Into<glib::Value> + Send,
    ) -> Self {
        self.s.set_with_id(name, value);
        self
    }

    impl_builder_gvalue_extra_setters!(field);

    #[must_use = "Building the structure without using it has no effect"]
    pub fn build(self) -> Structure {
        self.s
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use glib::gstr;

    #[test]
    fn new_set_get() {
        use glib::{value, Type};

        crate::init().unwrap();

        let mut s = Structure::new_empty("test");
        assert_eq!(s.name(), "test");

        s.set("f1", "abc");
        s.set("f2", String::from("bcd"));
        s.set("f3", 123i32);
        s.set("f5", Some("efg"));
        s.set("f7", 42i32);

        assert_eq!(s.get::<&str>("f1"), Ok("abc"));
        assert_eq!(s.get::<Option<&str>>("f2"), Ok(Some("bcd")));
        assert_eq!(s.get::<i32>("f3"), Ok(123i32));
        assert_eq!(s.get_optional::<&str>("f1"), Ok(Some("abc")));
        assert_eq!(s.get_optional::<&str>("f4"), Ok(None));
        assert_eq!(s.get_optional::<i32>("f3"), Ok(Some(123i32)));
        assert_eq!(s.get_optional::<i32>("f4"), Ok(None));
        assert_eq!(s.get::<&str>("f5"), Ok("efg"));
        assert_eq!(s.get::<i32>("f7"), Ok(42i32));

        assert_eq!(
            s.get::<i32>("f2"),
            Err(GetError::from_value_get_error(
                idstr!("f2"),
                value::ValueTypeMismatchError::new(Type::STRING, Type::I32),
            ))
        );
        assert_eq!(
            s.get::<bool>("f3"),
            Err(GetError::from_value_get_error(
                idstr!("f3"),
                value::ValueTypeMismatchError::new(Type::I32, Type::BOOL),
            ))
        );
        assert_eq!(
            s.get::<&str>("f4"),
            Err(GetError::new_field_not_found(idstr!("f4")))
        );
        assert_eq!(
            s.get::<i32>("f4"),
            Err(GetError::new_field_not_found(idstr!("f4")))
        );

        assert_eq!(
            s.fields().collect::<Vec<_>>(),
            vec!["f1", "f2", "f3", "f5", "f7"]
        );

        let v = s.iter().map(|(f, v)| (f, v.clone())).collect::<Vec<_>>();
        assert_eq!(v.len(), 5);
        assert_eq!(v[0].0, "f1");
        assert_eq!(v[0].1.get::<&str>(), Ok("abc"));
        assert_eq!(v[1].0, "f2");
        assert_eq!(v[1].1.get::<&str>(), Ok("bcd"));
        assert_eq!(v[2].0, "f3");
        assert_eq!(v[2].1.get::<i32>(), Ok(123i32));
        assert_eq!(v[3].0, "f5");
        assert_eq!(v[3].1.get::<&str>(), Ok("efg"));
        assert_eq!(v[4].0, "f7");
        assert_eq!(v[4].1.get::<i32>(), Ok(42i32));

        let s2 = Structure::builder("test")
            .field("f1", "abc")
            .field("f2", String::from("bcd"))
            .field("f3", 123i32)
            .field_if_some("f4", Option::<i32>::None)
            .field_if_some("f5", Some("efg"))
            .field_if_some("f6", Option::<&str>::None)
            .field_if("f7", 42i32, true)
            .field_if("f8", 21i32, false)
            .build();
        assert_eq!(s, s2);

        let mut s3 = Structure::new_empty("test");

        s3.set_if_some("f1", Some("abc"));
        s3.set_if_some("f2", Some(String::from("bcd")));
        s3.set_if_some("f3", Some(123i32));
        s3.set_if_some("f4", Option::<i32>::None);
        s3.set_if_some("f5", Some("efg"));
        s3.set_if_some("f6", Option::<&str>::None);
        s3.set_if("f7", 42i32, true);
        s3.set_if("f8", 21i32, false);
        assert_eq!(s, s3);
    }

    #[test]
    fn new_set_get_static() {
        use glib::{value, Type};

        crate::init().unwrap();

        let mut s = Structure::new_empty_from_static(gstr!("test"));
        assert_eq!(s.name(), "test");

        static F1: &GStr = gstr!("f1");
        static F2: &GStr = gstr!("f2");
        static F3: &GStr = gstr!("f3");

        s.set_with_static(F1, "abc");
        s.set_with_static_if(F2, String::from("bcd"), true);
        s.set_with_static_if(F3, "not_set", false);

        assert_eq!(s.get::<&str>(F1), Ok("abc"));
        assert_eq!(s.get::<Option<&str>>(F2), Ok(Some("bcd")));
        assert_eq!(s.get_optional::<&str>(F1), Ok(Some("abc")));
        assert_eq!(s.get_optional::<&str>(F3), Ok(None));

        assert_eq!(
            s.get::<i32>(F2),
            Err(GetError::from_value_get_error(
                idstr!("f2"),
                value::ValueTypeMismatchError::new(Type::STRING, Type::I32),
            ))
        );
        assert_eq!(
            s.get::<&str>(F3),
            Err(GetError::new_field_not_found(idstr!("f3")))
        );

        let s2 = Structure::builder("test")
            .field_with_static(F1, "abc")
            .field_with_static(F2, String::from("bcd"))
            .build();
        assert_eq!(s, s2);

        let mut s3 = Structure::new_empty("test");

        s3.set_with_static_if_some(F1, Some("abc"));
        s3.set_with_static_if_some(F2, Some(String::from("bcd")));

        assert_eq!(s, s3);
    }

    #[test]
    fn new_set_get_id_str() {
        use glib::{value, Type};

        crate::init().unwrap();

        let mut s = Structure::new_empty_from_id(idstr!("test"));
        assert_eq!(s.name(), "test");
        #[cfg(feature = "v1_26")]
        assert_eq!(s.name_id(), "test");

        let f1 = idstr!("f1");
        let f2 = idstr!("f2");
        let f3 = idstr!("f3");

        s.set_with_id(&f1, "abc");
        s.set_with_id_if(&f2, String::from("bcd"), true);
        s.set_with_id_if(&f3, "not_set", false);

        assert_eq!(s.get_by_id::<&str>(&f1), Ok("abc"));
        assert_eq!(s.get_by_id::<&str>(f1.clone()), Ok("abc"));
        assert_eq!(s.get_by_id::<Option<&str>>(&f2), Ok(Some("bcd")));
        assert_eq!(s.get_by_id::<Option<&str>>(f2.clone()), Ok(Some("bcd")));
        assert_eq!(s.get_optional_by_id::<&str>(&f1), Ok(Some("abc")));
        assert_eq!(s.get_optional_by_id::<&str>(&f3), Ok(None));

        assert_eq!(
            s.get_by_id::<i32>(&f2),
            Err(GetError::from_value_get_error(
                f2.clone(),
                value::ValueTypeMismatchError::new(Type::STRING, Type::I32),
            ))
        );
        assert_eq!(
            s.get_by_id::<&str>(&f3),
            Err(GetError::new_field_not_found(f3.clone()))
        );

        let s2 = Structure::builder("test")
            .field_with_id(&f1, "abc")
            .field_with_id(&f2, String::from("bcd"))
            .build();
        assert_eq!(s, s2);

        let mut s3 = Structure::new_empty("test");

        s3.set_with_id_if_some(f1, Some("abc"));
        s3.set_with_id_if_some(f2, Some(String::from("bcd")));

        assert_eq!(s, s3);
    }

    #[test]
    fn test_string_conversion() {
        crate::init().unwrap();

        let a = "Test, f1=(string)abc, f2=(uint)123;";

        let s = a.parse::<Structure>().unwrap();
        assert_eq!(s.get::<&str>("f1"), Ok("abc"));
        assert_eq!(s.get::<u32>("f2"), Ok(123));

        assert_eq!(a, s.to_string());
    }

    #[test]
    fn test_from_value_optional() {
        use glib::value::ToValue;

        crate::init().unwrap();

        let a = None::<&Structure>.to_value();
        assert!(a.get::<Option<Structure>>().unwrap().is_none());
        let b = "foo".parse::<Structure>().unwrap().to_value();
        assert!(b.get::<Option<Structure>>().unwrap().is_some());
    }

    #[test]
    fn test_new_from_iter() {
        crate::init().unwrap();

        let s = Structure::builder("test")
            .field("f1", "abc")
            .field_with_static(gstr!("f2"), String::from("bcd"))
            .field_with_id(idstr!("f3"), 123i32)
            .build();

        let s2 = Structure::from_iter(
            s.name(),
            s.iter()
                .filter(|(f, _)| *f == "f1")
                .map(|(f, v)| (f, v.clone())),
        );

        assert_eq!(s2.name(), "test");
        assert_eq!(s2.get::<&str>("f1"), Ok("abc"));
        assert!(s2.get::<&str>("f2").is_err());
        assert!(s2.get_by_id::<&str>(idstr!("f3")).is_err());
    }

    #[test]
    fn test_debug() {
        crate::init().unwrap();

        let s = Structure::builder("test")
            .field("f1", "abc")
            .field("f2", String::from("bcd"))
            .field("f3", 123i32)
            .field(
                "f4",
                Structure::builder("nested").field("badger", true).build(),
            )
            .field("f5", crate::Array::new(["a", "b", "c"]))
            .field("f6", crate::List::new(["d", "e", "f"]))
            .build();

        assert_eq!(format!("{s:?}"), "Structure(test { f1: (gchararray) \"abc\", f2: (gchararray) \"bcd\", f3: (gint) 123, f4: Structure(nested { badger: (gboolean) TRUE }), f5: Array([(gchararray) \"a\", (gchararray) \"b\", (gchararray) \"c\"]), f6: List([(gchararray) \"d\", (gchararray) \"e\", (gchararray) \"f\"]) })");
    }

    #[test]
    fn builder_field_from_iter() {
        crate::init().unwrap();

        static SLIST: &GStr = gstr!("slist");
        let ilist = idstr!("ilist");
        let s = Structure::builder("test")
            .field_from_iter::<crate::Array, i32>("array", [1, 2, 3])
            .field_with_static_from_iter::<crate::List, i32>(SLIST, [4, 5, 6])
            .field_with_id_from_iter::<crate::List, i32>(&ilist, [7, 8, 9])
            .build();
        assert!(s
            .get::<crate::Array>("array")
            .unwrap()
            .iter()
            .map(|val| val.get::<i32>().unwrap())
            .eq([1, 2, 3]));
        assert!(s
            .get::<crate::List>("slist")
            .unwrap()
            .iter()
            .map(|val| val.get::<i32>().unwrap())
            .eq([4, 5, 6]));
        assert!(s
            .get_by_id::<crate::List>(&ilist)
            .unwrap()
            .iter()
            .map(|val| val.get::<i32>().unwrap())
            .eq([7, 8, 9]));

        let array = Vec::<i32>::new();
        let s = Structure::builder("test")
            .field_from_iter::<crate::Array, _>("array", &array)
            .field_with_static_from_iter::<crate::List, _>(SLIST, &array)
            .field_with_id_from_iter::<crate::List, _>(&ilist, &array)
            .build();
        assert!(s.get::<crate::Array>("array").unwrap().as_ref().is_empty());
        assert!(s.get::<crate::List>(SLIST).unwrap().as_ref().is_empty());
        assert!(s
            .get_by_id::<crate::List>(ilist)
            .unwrap()
            .as_ref()
            .is_empty());
    }

    #[test]
    fn builder_field_if_not_empty() {
        crate::init().unwrap();

        static SLIST: &GStr = gstr!("slist");
        let ilist = idstr!("ilist");
        let s = Structure::builder_from_id(idstr!("test"))
            .field_if_not_empty::<crate::Array, i32>("array", [1, 2, 3])
            .field_with_static_if_not_empty::<crate::List, i32>(SLIST, [4, 5, 6])
            .field_with_id_if_not_empty::<crate::List, i32>(&ilist, [7, 8, 9])
            .build();
        assert!(s
            .get::<crate::Array>("array")
            .unwrap()
            .iter()
            .map(|val| val.get::<i32>().unwrap())
            .eq([1, 2, 3]));
        assert!(s
            .get::<crate::List>("slist")
            .unwrap()
            .iter()
            .map(|val| val.get::<i32>().unwrap())
            .eq([4, 5, 6]));
        assert!(s
            .get_by_id::<crate::List>(&ilist)
            .unwrap()
            .iter()
            .map(|val| val.get::<i32>().unwrap())
            .eq([7, 8, 9]));

        let array = Vec::<i32>::new();
        let s = Structure::builder("test")
            .field_if_not_empty::<crate::Array, _>("array", &array)
            .field_with_static_if_not_empty::<crate::List, _>(SLIST, &array)
            .field_with_id_if_not_empty::<crate::List, _>(ilist, &array)
            .build();
        assert!(!s.has_field("array"));
        assert!(!s.has_field("slist"));
        assert!(!s.has_field("ilist"));
    }

    #[test]
    fn nth_field_remove_field() {
        crate::init().unwrap();

        let f3 = idstr!("f3");
        let f5 = idstr!("f5");
        let f8 = idstr!("f8");
        let mut s = Structure::builder("test")
            .field("f1", "abc")
            .field("f2", "bcd")
            .field_with_id(&f3, "cde")
            .field("f4", "def")
            .field_with_id(&f5, "efg")
            .field("f6", "fgh")
            .field("f7", "ghi")
            .field_with_id(&f8, "hij")
            .build();

        assert_eq!(s.iter().next().unwrap().0, "f1");
        assert_eq!(
            s.fields().collect::<Vec<_>>(),
            vec!["f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8"]
        );
        assert!(s.has_field("f8"));
        assert_eq!(s.nth_field_name(7), Some(gstr!("f8")));
        assert!(s.nth_field_name(8).is_none());

        #[cfg(feature = "v1_26")]
        assert_eq!(s.id_iter().next().unwrap().0, "f1");
        #[cfg(feature = "v1_26")]
        assert_eq!(
            s.field_ids().collect::<Vec<_>>(),
            vec!["f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8"]
        );
        #[cfg(feature = "v1_26")]
        assert!(s.has_field_by_id(&f8));
        #[cfg(feature = "v1_26")]
        assert_eq!(s.nth_field_by_id(7), Some(&f8));
        #[cfg(feature = "v1_26")]
        assert!(s.nth_field_by_id(8).is_none());

        assert_eq!(s.nth_field_name(1), Some(gstr!("f2")));
        s.remove_field("f2");
        assert_eq!(s.nth_field_name(1), Some(gstr!("f3")));
        assert!(s.nth_field_name(7).is_none());
        assert_eq!(
            s.fields().collect::<Vec<_>>(),
            vec!["f1", "f3", "f4", "f5", "f6", "f7", "f8"]
        );

        assert_eq!(s.nth_field_name(1), Some(gstr!("f3")));
        s.remove_field_by_id(&f3);
        assert_eq!(s.nth_field_name(1), Some(gstr!("f4")));
        assert!(s.nth_field_name(6).is_none());
        #[cfg(feature = "v1_26")]
        assert_eq!(s.nth_field_by_id(2), Some(&f5));
        #[cfg(feature = "v1_26")]
        assert!(s.nth_field_by_id(6).is_none());
        assert_eq!(
            s.fields().collect::<Vec<_>>(),
            vec!["f1", "f4", "f5", "f6", "f7", "f8"]
        );

        s.remove_fields(["f4", "f6"]);
        assert_eq!(s.fields().collect::<Vec<_>>(), vec!["f1", "f5", "f7", "f8"]);

        s.remove_field_by_ids([&f5, &f8]);
        assert_eq!(s.fields().collect::<Vec<_>>(), vec!["f1", "f7"]);
        #[cfg(feature = "v1_26")]
        assert_eq!(s.field_ids().collect::<Vec<_>>(), vec!["f1", "f7"]);

        s.remove_all_fields();
        assert!(s.is_empty());
    }

    #[cfg(feature = "v1_26")]
    #[test]
    fn map_in_place() {
        crate::init().unwrap();

        let f1 = idstr!("f1");
        let f2 = idstr!("f2");
        let f3 = idstr!("f3");
        let mut s = Structure::builder_from_id(idstr!("test"))
            .field_with_id(&f1, "abc")
            .field_with_id(&f2, "bcd")
            .field_with_id(&f3, false)
            .build();
        assert!(!s.get_by_id::<bool>(&f3).unwrap());

        s.map_in_place_by_id(|name, value| {
            if *name == f3 {
                *value = true.into()
            }

            std::ops::ControlFlow::Continue(())
        });
        assert!(s.get_by_id::<bool>(&f3).unwrap());

        s.map_in_place_by_id(|name, value| {
            match name.as_str() {
                "f2" => return std::ops::ControlFlow::Break(()),
                "f3" => *value = false.into(),
                _ => (),
            }
            std::ops::ControlFlow::Continue(())
        });
        assert!(s.get_by_id::<bool>(&f3).unwrap());

        s.filter_map_in_place_by_id(|name, value| {
            if *name == f3 && value.get::<bool>().unwrap() {
                None
            } else {
                Some(value)
            }
        });

        assert_eq!(s.field_ids().collect::<Vec<_>>(), vec![&f1, &f2]);
    }

    #[cfg(feature = "v1_28")]
    #[test]
    fn test_hash() {
        crate::init().unwrap();

        use std::hash::BuildHasher;
        let bh = std::hash::RandomState::new();

        // Different names
        let s1 = Structure::builder("test1").build();
        let s2 = Structure::builder("test2").build();
        assert_eq!(bh.hash_one(&s1), bh.hash_one(&s1));
        assert_eq!(bh.hash_one(&s2), bh.hash_one(&s2));
        assert_ne!(bh.hash_one(&s1), bh.hash_one(&s2));

        // Same name different fields
        let s1 = Structure::builder("test").field("a", 1u32).build();
        let s2 = Structure::builder("test").field("b", 1u32).build();
        assert_eq!(bh.hash_one(&s1), bh.hash_one(&s1));
        assert_eq!(bh.hash_one(&s2), bh.hash_one(&s2));
        assert_ne!(bh.hash_one(&s1), bh.hash_one(&s2));

        // Same name different field values
        let s1 = Structure::builder("test").field("a", 1u32).build();
        let s2 = Structure::builder("test").field("a", 2u32).build();
        assert_eq!(bh.hash_one(&s1), bh.hash_one(&s1));
        assert_eq!(bh.hash_one(&s2), bh.hash_one(&s2));
        assert_ne!(bh.hash_one(&s1), bh.hash_one(&s2));

        // Same structure but fields in a different order
        let s1 = Structure::builder("test")
            .field("a", 1u32)
            .field("b", 2u32)
            .build();
        let s2 = Structure::builder("test")
            .field("b", 2u32)
            .field("a", 1u32)
            .build();
        assert_eq!(bh.hash_one(&s1), bh.hash_one(&s1));
        assert_eq!(bh.hash_one(&s2), bh.hash_one(&s2));
        assert_eq!(bh.hash_one(&s1), bh.hash_one(&s2));
    }
}