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

// rustdoc-stripper-ignore-next
//! Traits intended for subclassing [`TextBuffer`](crate::TextBuffer).

use crate::{
    prelude::*, subclass::prelude::*, TextBuffer, TextChildAnchor, TextIter, TextMark, TextTag,
};
use glib::translate::*;

pub trait TextBufferImpl: TextBufferImplExt + ObjectImpl {
    /// Emits the “apply-tag” signal on @self.
    ///
    /// The default handler for the signal applies
    /// @tag to the given range. @start and @end do
    /// not have to be in order.
    /// ## `tag`
    /// a [`TextTag`][crate::TextTag]
    /// ## `start`
    /// one bound of range to be tagged
    /// ## `end`
    /// other bound of range to be tagged
    fn apply_tag(&self, tag: &TextTag, start: &TextIter, end: &TextIter) {
        self.parent_apply_tag(tag, start, end)
    }
    /// Called to indicate that the buffer operations between here and a
    /// call to gtk_text_buffer_end_user_action() are part of a single
    /// user-visible operation.
    ///
    /// The operations between gtk_text_buffer_begin_user_action() and
    /// gtk_text_buffer_end_user_action() can then be grouped when creating
    /// an undo stack. [`TextBuffer`][crate::TextBuffer] maintains a count of calls to
    /// gtk_text_buffer_begin_user_action() that have not been closed with
    /// a call to gtk_text_buffer_end_user_action(), and emits the
    /// “begin-user-action” and “end-user-action” signals only for the
    /// outermost pair of calls. This allows you to build user actions
    /// from other user actions.
    ///
    /// The “interactive” buffer mutation functions, such as
    /// [`TextBufferExt::insert_interactive()`][crate::prelude::TextBufferExt::insert_interactive()], automatically call
    /// begin/end user action around the buffer operations they perform,
    /// so there's no need to add extra calls if you user action consists
    /// solely of a single call to one of those functions.
    fn begin_user_action(&self) {
        self.parent_begin_user_action()
    }
    fn changed(&self) {
        self.parent_changed()
    }
    fn delete_range(&self, start: &mut TextIter, end: &mut TextIter) {
        self.parent_delete_range(start, end)
    }
    /// Ends a user-visible operation.
    ///
    /// Should be paired with a call to
    /// [`TextBufferExt::begin_user_action()`][crate::prelude::TextBufferExt::begin_user_action()].
    /// See that function for a full explanation.
    fn end_user_action(&self) {
        self.parent_end_user_action()
    }
    /// Inserts a child widget anchor into the text buffer at @iter.
    ///
    /// The anchor will be counted as one character in character counts, and
    /// when obtaining the buffer contents as a string, will be represented
    /// by the Unicode “object replacement character” 0xFFFC. Note that the
    /// “slice” variants for obtaining portions of the buffer as a string
    /// include this character for child anchors, but the “text” variants do
    /// not. E.g. see [`TextBufferExt::slice()`][crate::prelude::TextBufferExt::slice()] and
    /// [`TextBufferExt::text()`][crate::prelude::TextBufferExt::text()].
    ///
    /// Consider [`TextBufferExt::create_child_anchor()`][crate::prelude::TextBufferExt::create_child_anchor()] as a more
    /// convenient alternative to this function. The buffer will add a
    /// reference to the anchor, so you can unref it after insertion.
    /// ## `iter`
    /// location to insert the anchor
    /// ## `anchor`
    /// a [`TextChildAnchor`][crate::TextChildAnchor]
    fn insert_child_anchor(&self, iter: &mut TextIter, anchor: &TextChildAnchor) {
        self.parent_insert_child_anchor(iter, anchor)
    }
    /// Inserts an image into the text buffer at @iter.
    ///
    /// The image will be counted as one character in character counts,
    /// and when obtaining the buffer contents as a string, will be
    /// represented by the Unicode “object replacement character” 0xFFFC.
    /// Note that the “slice” variants for obtaining portions of the buffer
    /// as a string include this character for paintable, but the “text”
    /// variants do not. e.g. see [`TextBufferExt::slice()`][crate::prelude::TextBufferExt::slice()] and
    /// [`TextBufferExt::text()`][crate::prelude::TextBufferExt::text()].
    /// ## `iter`
    /// location to insert the paintable
    /// ## `paintable`
    /// a [`gdk::Paintable`][crate::gdk::Paintable]
    fn insert_paintable(&self, iter: &mut TextIter, paintable: &gdk::Paintable) {
        self.parent_insert_paintable(iter, paintable)
    }
    fn insert_text(&self, iter: &mut TextIter, new_text: &str) {
        self.parent_insert_text(iter, new_text)
    }
    fn mark_deleted(&self, mark: &TextMark) {
        self.parent_mark_deleted(mark);
    }
    fn mark_set(&self, location: &TextIter, mark: &TextMark) {
        self.parent_mark_set(location, mark)
    }
    fn modified_changed(&self) {
        self.parent_modified_changed();
    }
    fn paste_done(&self, clipboard: &gdk::Clipboard) {
        self.parent_paste_done(clipboard)
    }
    /// Redoes the next redoable action on the buffer, if there is one.
    fn redo(&self) {
        self.parent_redo()
    }
    /// Emits the “remove-tag” signal.
    ///
    /// The default handler for the signal removes all occurrences
    /// of @tag from the given range. @start and @end don’t have
    /// to be in order.
    /// ## `tag`
    /// a [`TextTag`][crate::TextTag]
    /// ## `start`
    /// one bound of range to be untagged
    /// ## `end`
    /// other bound of range to be untagged
    fn remove_tag(&self, tag: &TextTag, start: &TextIter, end: &TextIter) {
        self.parent_remove_tag(tag, start, end)
    }
    /// Undoes the last undoable action on the buffer, if there is one.
    fn undo(&self) {
        self.parent_undo()
    }
}

mod sealed {
    pub trait Sealed {}
    impl<T: super::TextBufferImplExt> Sealed for T {}
}

pub trait TextBufferImplExt: sealed::Sealed + ObjectSubclass {
    fn parent_apply_tag(&self, tag: &TextTag, start: &TextIter, end: &TextIter) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).apply_tag {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    tag.to_glib_none().0,
                    start.to_glib_none().0,
                    end.to_glib_none().0,
                )
            }
        }
    }

    fn parent_begin_user_action(&self) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).begin_user_action {
                f(self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0)
            }
        }
    }

    fn parent_changed(&self) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).changed {
                f(self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0)
            }
        }
    }

    fn parent_delete_range(&self, start: &mut TextIter, end: &mut TextIter) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).delete_range {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    start.to_glib_none_mut().0,
                    end.to_glib_none_mut().0,
                )
            }
        }
    }

    fn parent_end_user_action(&self) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).end_user_action {
                f(self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0)
            }
        }
    }

    fn parent_insert_child_anchor(&self, iter: &mut TextIter, anchor: &TextChildAnchor) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).insert_child_anchor {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    iter.to_glib_none_mut().0,
                    anchor.to_glib_none().0,
                )
            }
        }
    }

    fn parent_insert_paintable(&self, iter: &mut TextIter, paintable: &gdk::Paintable) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).insert_paintable {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    iter.to_glib_none_mut().0,
                    paintable.to_glib_none().0,
                )
            }
        }
    }

    fn parent_insert_text(&self, iter: &mut TextIter, new_text: &str) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).insert_text {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    iter.to_glib_none_mut().0,
                    new_text.to_glib_none().0,
                    new_text.len() as i32,
                )
            }
        }
    }

    fn parent_mark_deleted(&self, mark: &TextMark) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).mark_deleted {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    mark.to_glib_none().0,
                )
            }
        }
    }

    fn parent_mark_set(&self, location: &TextIter, mark: &TextMark) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).mark_set {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    location.to_glib_none().0,
                    mark.to_glib_none().0,
                )
            }
        }
    }

    fn parent_modified_changed(&self) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).modified_changed {
                f(self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0)
            }
        }
    }

    fn parent_paste_done(&self, clipboard: &gdk::Clipboard) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).paste_done {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    clipboard.to_glib_none().0,
                )
            }
        }
    }

    fn parent_redo(&self) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).redo {
                f(self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0)
            }
        }
    }

    fn parent_remove_tag(&self, tag: &TextTag, start: &TextIter, end: &TextIter) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).remove_tag {
                f(
                    self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0,
                    tag.to_glib_none().0,
                    start.to_glib_none().0,
                    end.to_glib_none().0,
                )
            }
        }
    }

    fn parent_undo(&self) {
        unsafe {
            let data = Self::type_data();
            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkTextBufferClass;
            if let Some(f) = (*parent_class).undo {
                f(self.obj().unsafe_cast_ref::<TextBuffer>().to_glib_none().0)
            }
        }
    }
}

impl<T: TextBufferImpl> TextBufferImplExt for T {}

unsafe impl<T: TextBufferImpl> IsSubclassable<T> for TextBuffer {
    fn class_init(class: &mut glib::Class<Self>) {
        Self::parent_class_init::<T>(class);

        assert_initialized_main_thread!();

        let klass = class.as_mut();
        klass.apply_tag = Some(text_buffer_apply_tag::<T>);
        klass.begin_user_action = Some(text_buffer_begin_user_action::<T>);
        klass.changed = Some(text_buffer_changed::<T>);
        klass.delete_range = Some(text_buffer_delete_range::<T>);
        klass.end_user_action = Some(text_buffer_end_user_action::<T>);
        klass.insert_child_anchor = Some(text_buffer_insert_child_anchor::<T>);
        klass.insert_paintable = Some(text_buffer_insert_paintable::<T>);
        klass.insert_text = Some(text_buffer_insert_text::<T>);
        klass.mark_deleted = Some(text_buffer_mark_deleted::<T>);
        klass.mark_set = Some(text_buffer_mark_set::<T>);
        klass.modified_changed = Some(text_buffer_modified_changed::<T>);
        klass.paste_done = Some(text_buffer_paste_done::<T>);
        klass.remove_tag = Some(text_buffer_remove_tag::<T>);
        klass.redo = Some(text_buffer_redo::<T>);
        klass.undo = Some(text_buffer_undo::<T>);
    }
}

unsafe extern "C" fn text_buffer_apply_tag<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    tag_ptr: *mut ffi::GtkTextTag,
    start_ptr: *const ffi::GtkTextIter,
    end_ptr: *const ffi::GtkTextIter,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.apply_tag(
        &from_glib_borrow(tag_ptr),
        &from_glib_borrow(start_ptr),
        &from_glib_borrow(end_ptr),
    )
}

unsafe extern "C" fn text_buffer_begin_user_action<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.begin_user_action()
}

unsafe extern "C" fn text_buffer_changed<T: TextBufferImpl>(ptr: *mut ffi::GtkTextBuffer) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.changed()
}

unsafe extern "C" fn text_buffer_delete_range<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    start_ptr: *mut ffi::GtkTextIter,
    end_ptr: *mut ffi::GtkTextIter,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    let mut start_copy = from_glib_none(start_ptr);
    let mut end_copy = from_glib_none(end_ptr);

    imp.delete_range(&mut start_copy, &mut end_copy);

    *start_ptr = *start_copy.to_glib_none().0;
    *end_ptr = *end_copy.to_glib_none().0;
}

unsafe extern "C" fn text_buffer_end_user_action<T: TextBufferImpl>(ptr: *mut ffi::GtkTextBuffer) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.end_user_action()
}

unsafe extern "C" fn text_buffer_insert_child_anchor<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    iter_ptr: *mut ffi::GtkTextIter,
    anchor_ptr: *mut ffi::GtkTextChildAnchor,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    let mut iter = from_glib_none(iter_ptr);

    imp.insert_child_anchor(&mut iter, &from_glib_borrow(anchor_ptr));
    *iter_ptr = *iter.to_glib_none().0;
}

unsafe extern "C" fn text_buffer_insert_paintable<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    iter_ptr: *mut ffi::GtkTextIter,
    paintable_ptr: *mut gdk::ffi::GdkPaintable,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    let mut iter = from_glib_none(iter_ptr);

    imp.insert_paintable(&mut iter, &from_glib_borrow(paintable_ptr));
    *iter_ptr = *iter.to_glib_none().0;
}

unsafe extern "C" fn text_buffer_insert_text<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    iter_ptr: *mut ffi::GtkTextIter,
    text_ptr: *const libc::c_char,
    _length: libc::c_int,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();
    let text: Borrowed<glib::GString> = from_glib_borrow(text_ptr);

    let mut iter = from_glib_none(iter_ptr);

    imp.insert_text(&mut iter, text.as_str());
    *iter_ptr = *iter.to_glib_none().0;
}

unsafe extern "C" fn text_buffer_modified_changed<T: TextBufferImpl>(ptr: *mut ffi::GtkTextBuffer) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.modified_changed()
}

unsafe extern "C" fn text_buffer_mark_deleted<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    mark: *mut ffi::GtkTextMark,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.mark_deleted(&from_glib_borrow(mark))
}

unsafe extern "C" fn text_buffer_mark_set<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    iter: *const ffi::GtkTextIter,
    mark: *mut ffi::GtkTextMark,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.mark_set(&from_glib_borrow(iter), &from_glib_borrow(mark))
}

unsafe extern "C" fn text_buffer_paste_done<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    clipboard_ptr: *mut gdk::ffi::GdkClipboard,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.paste_done(&from_glib_borrow(clipboard_ptr))
}

unsafe extern "C" fn text_buffer_redo<T: TextBufferImpl>(ptr: *mut ffi::GtkTextBuffer) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.redo()
}

unsafe extern "C" fn text_buffer_remove_tag<T: TextBufferImpl>(
    ptr: *mut ffi::GtkTextBuffer,
    tag: *mut ffi::GtkTextTag,
    start: *const ffi::GtkTextIter,
    end: *const ffi::GtkTextIter,
) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.remove_tag(
        &from_glib_borrow(tag),
        &from_glib_borrow(start),
        &from_glib_borrow(end),
    )
}

unsafe extern "C" fn text_buffer_undo<T: TextBufferImpl>(ptr: *mut ffi::GtkTextBuffer) {
    let instance = &*(ptr as *mut T::Instance);
    let imp = instance.imp();

    imp.undo()
}