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use syn::Ident;
use quote::{quote, format_ident};
use std::path::{PathBuf, Path};
use xml::EventReader;
use xml::reader::XmlEvent;
use std::fs::File;
use syn::export::TokenStream2;
use convert_case::{Case, Casing};
use std::io::Write;
use std::process::Command;
const README: &[u8] = include_bytes!("README.txt");
const HEAD_ANNOTATION: &[u8] = include_bytes!("head_annotation.rs");
const BUILD_SCRIPT_HEAD_ANNOTATION: &[u8] = include_bytes!("build_script_head_annotation.rs");
pub fn generate_bind_build_script<T: AsRef<Path>>(directory_path: T, static_value: bool) {
generate_bind_recursive(&directory_path, true, false, static_value);
let mut path = PathBuf::from(directory_path.as_ref());
path.push("README_glade-bindgen.txt");
std::fs::write(&path, README).unwrap();
println!("cargo:rerun-if-changed={}", path.to_str().unwrap());
}
pub fn generate_bind_recursive<T: AsRef<Path>>(directory_path: T, build_script: bool, format: bool, static_value: bool) -> bool {
let read_dir = std::fs::read_dir(&directory_path).unwrap();
let mut modules = Vec::new();
let mut generated_token_streams = Vec::new();
for x in read_dir {
let dir_entry = x.unwrap();
let file_name = dir_entry.file_name().into_string().unwrap();
if file_name == "." || file_name == ".."{
continue;
}
if dir_entry.path().is_dir() {
if generate_bind_recursive(dir_entry.path(), build_script, format, static_value) {
modules.push(file_name);
}
} else if file_name.ends_with(".glade") {
let name = format_ident!("{}", file_name.replace(".glade", "").to_case(Case::Pascal));
let file = File::open(dir_entry.path()).unwrap();
generated_token_streams.push(generate_bind(name, file, file_name, static_value));
}
}
if modules.is_empty() && generated_token_streams.is_empty() {
return false;
}
let mut token_stream = TokenStream2::new();
for x in modules {
let module = format_ident!("{}", x);
token_stream.extend(quote! {
pub mod #module;
});
}
for x in generated_token_streams {
token_stream.extend::<TokenStream2>(x.into());
}
let mut mod_path = PathBuf::from(directory_path.as_ref());
mod_path.push("mod.rs");
{
let mut mod_file = File::create(&mod_path).unwrap();
mod_file.write_all(if build_script {
BUILD_SCRIPT_HEAD_ANNOTATION
} else {
HEAD_ANNOTATION
}).unwrap();
mod_file.write_all(token_stream.to_string().as_bytes()).unwrap();
}
if format {
Command::new("rustfmt").args(&[std::fs::canonicalize(mod_path).unwrap()]).output()
.expect("failed to format");
}
true
}
pub fn generate_bind<T: AsRef<Path>>(name: Ident, file: File, file_include_dir: T, static_value: bool) -> TokenStream2 {
let mut objects = TokenStream2::new();
let mut objects_new = TokenStream2::new();
let parser = EventReader::new(file);
for e in parser {
match e {
Ok(XmlEvent::StartElement { name, attributes, .. }) => {
if &name.local_name == "object" {
let id = attributes.iter().find(| attr | attr.name.local_name == "id");
if id.is_some() {
let class = attributes.iter().find(| attr | attr.name.local_name == "class");
if class.is_some() {
let class = class.unwrap().value.to_owned();
let class_ident = format_ident!("{}", class.replace("Gtk", ""));
let id = id.unwrap().value.to_owned();
let id_ident = format_ident!("{}", &id);
objects.extend::<TokenStream2>(quote!{
pub #id_ident: gtk::#class_ident,
}.into());
objects_new.extend::<TokenStream2>(quote! {
#id_ident: gtk::prelude::BuilderExtManual::get_object(&builder, #id).unwrap(),
})
}
}
}
}
Err(e) => {
println!("Error: {}", e);
break;
}
_ => {}
}
}
let include_str = format_ident!("include_str");
let thread_local = format_ident!("thread_local");
let include = file_include_dir.as_ref().to_str().unwrap();
let static_value_token_stream : TokenStream2 = if static_value {
quote! {
#thread_local! {
static OBJECTS: std::sync::Mutex<Option<std::rc::Rc<#name>>> = std::sync::Mutex::new(None);
}
pub fn get() -> std::rc::Rc<Self> {
Self::OBJECTS.with(| objects | {
let mut objects = objects.lock().unwrap();
if objects.is_none() {
objects.replace(std::rc::Rc::new(Self::new()));
}
objects.as_ref().unwrap().clone()
})
}
}
} else {
TokenStream2::new()
};
let token_stream = quote!{
#[allow(dead_code)]
pub struct #name {
#objects
}
impl #name {
#static_value_token_stream
pub fn new() -> Self {
let builder = gtk::Builder::from_string(#include_str!(#include));
Self {
#objects_new
}
}
}
};
token_stream.into()
}