1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141

// Copyright 2013-2015, The Gtk-rs Project Developers.
// See the COPYRIGHT file at the top-level directory of this distribution.
// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>

use glib::object::{Cast, IsA};
use glib::translate::*;
use glib::GString;
use glib::Object;
use glib::ObjectExt;
use gtk_sys;
use std::path::Path;
use Builder;

impl Builder {
    pub fn from_file<T: AsRef<Path>>(file_path: T) -> Builder {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(gtk_sys::gtk_builder_new_from_file(
                file_path.as_ref().to_glib_none().0,
            ))
        }
    }
}

pub trait BuilderExtManual: 'static {
    /// Gets the object named `name`. Note that this function does not
    /// increment the reference count of the returned object.
    /// ## `name`
    /// name of object to get
    ///
    /// # Returns
    ///
    /// the object named `name` or `None` if
    ///  it could not be found in the object tree.
    fn get_object<T: IsA<Object>>(&self, name: &str) -> Option<T>;
    /// Parses a file containing a [`Builder` UI definition][BUILDER-UI]
    /// and merges it with the current contents of `self`.
    ///
    /// Most users will probably want to use `Builder::new_from_file`.
    ///
    /// If an error occurs, 0 will be returned and `error` will be assigned a
    /// `glib::Error` from the `GTK_BUILDER_ERROR`, `G_MARKUP_ERROR` or `G_FILE_ERROR`
    /// domain.
    ///
    /// It’s not really reasonable to attempt to handle failures of this
    /// call. You should not use this function with untrusted files (ie:
    /// files that are not part of your application). Broken `Builder`
    /// files can easily crash your program, and it’s possible that memory
    /// was leaked leading up to the reported failure. The only reasonable
    /// thing to do when an error is detected is to call `g_error`.
    /// ## `filename`
    /// the name of the file to parse
    ///
    /// # Returns
    ///
    /// A positive value on success, 0 if an error occurred
    fn add_from_file<T: AsRef<Path>>(&self, file_path: T) -> Result<(), glib::Error>;
    fn connect_signals<
        P: FnMut(&Builder, &str) -> Box<dyn Fn(&[glib::Value]) -> Option<glib::Value> + 'static>,
    >(
        &self,
        func: P,
    );
}

impl<O: IsA<Builder>> BuilderExtManual for O {
    fn get_object<T: IsA<Object>>(&self, name: &str) -> Option<T> {
        unsafe {
            Option::<Object>::from_glib_none(gtk_sys::gtk_builder_get_object(
                self.upcast_ref().to_glib_none().0,
                name.to_glib_none().0,
            ))
            .and_then(|obj| obj.dynamic_cast::<T>().ok())
        }
    }

    fn add_from_file<T: AsRef<Path>>(&self, file_path: T) -> Result<(), glib::Error> {
        unsafe {
            let mut error = ::std::ptr::null_mut();
            gtk_sys::gtk_builder_add_from_file(
                self.upcast_ref().to_glib_none().0,
                file_path.as_ref().to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    fn connect_signals<
        P: FnMut(&Builder, &str) -> Box<dyn Fn(&[glib::Value]) -> Option<glib::Value> + 'static>,
    >(
        &self,
        func: P,
    ) {
        let func_data: P = func;
        unsafe extern "C" fn func_func<
            P: FnMut(&Builder, &str) -> Box<dyn Fn(&[glib::Value]) -> Option<glib::Value> + 'static>,
        >(
            builder: *mut gtk_sys::GtkBuilder,
            object: *mut gobject_sys::GObject,
            signal_name: *const libc::c_char,
            handler_name: *const libc::c_char,
            connect_object: *mut gobject_sys::GObject,
            flags: gobject_sys::GConnectFlags,
            user_data: glib_sys::gpointer,
        ) {
            assert!(connect_object.is_null(), "Connect object is not supported");
            assert!(
                flags & gobject_sys::G_CONNECT_SWAPPED == 0,
                "Swapped signal handler is not supported"
            );

            let builder = from_glib_borrow(builder);
            let object: Borrowed<glib::Object> = from_glib_borrow(object);
            let signal_name: Borrowed<GString> = from_glib_borrow(signal_name);
            let handler_name: Borrowed<GString> = from_glib_borrow(handler_name);
            let callback: *mut P = user_data as *const _ as usize as *mut P;
            let func = (*callback)(&builder, handler_name.as_str());
            object
                .connect_unsafe(
                    signal_name.as_str(),
                    flags & gobject_sys::G_CONNECT_AFTER != 0,
                    move |args| func(args),
                )
                .expect("Failed to connect to builder signal");
        }
        let func = Some(func_func::<P> as _);
        let super_callback0: &P = &func_data;
        unsafe {
            gtk_sys::gtk_builder_connect_signals_full(
                self.as_ref().to_glib_none().0,
                func,
                super_callback0 as *const _ as usize as *mut _,
            );
        }
    }
}