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

use glib::translate::*;
use std::ptr;

/// See also [`PrintSettings::set_page_ranges()`][crate::PrintSettings::set_page_ranges()].
#[repr(C)]
#[doc(alias = "GtkPageRange")]
pub struct PageRange(ffi::GtkPageRange);

impl PageRange {
    pub fn new(start: i32, end: i32) -> PageRange {
        skip_assert_initialized!();
        PageRange(ffi::GtkPageRange { start, end })
    }

    #[doc(alias = "get_start")]
    pub fn start(&self) -> i32 {
        self.0.start
    }

    #[doc(alias = "get_end")]
    pub fn end(&self) -> i32 {
        self.0.end
    }
}

#[doc(hidden)]
impl IntoGlib for PageRange {
    type GlibType = ffi::GtkPageRange;

    fn into_glib(self) -> ffi::GtkPageRange {
        self.0
    }
}

#[doc(hidden)]
impl<'a> ToGlibPtr<'a, *const ffi::GtkPageRange> for PageRange {
    type Storage = Box<ffi::GtkPageRange>;

    #[inline]
    fn to_glib_none(&'a self) -> Stash<'a, *const ffi::GtkPageRange, Self> {
        let page_range = Box::new(self.0);
        Stash(&*page_range, page_range)
    }
}

impl FromGlibContainerAsVec<ffi::GtkPageRange, *mut ffi::GtkPageRange> for PageRange {
    unsafe fn from_glib_none_num_as_vec(ptr: *mut ffi::GtkPageRange, num: usize) -> Vec<Self> {
        if num == 0 || ptr.is_null() {
            return Vec::new();
        }

        let mut res = Vec::with_capacity(num);
        for i in 0..num {
            res.push(PageRange(ptr::read(ptr.add(i))));
        }
        res
    }

    unsafe fn from_glib_container_num_as_vec(_: *mut ffi::GtkPageRange, _: usize) -> Vec<Self> {
        unimplemented!();
    }

    unsafe fn from_glib_full_num_as_vec(_: *mut ffi::GtkPageRange, _: usize) -> Vec<Self> {
        unimplemented!();
    }
}