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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1 @@ | ||
| # fltk-webview-sys | ||
| A binding to a tiny cross-platform [webview](https://github.com/webview/webview) library |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,155 +1 @@ | ||
| #![allow(non_camel_case_types)] | ||
|
|
||
| // Uses code from https://github.com/webview/webview_rust/blob/dev/src/webview.rs | ||
|
|
||
| mod sys; | ||
| pub use sys::*; | ||
|
|
||
| use std::{ | ||
| ffi::{CStr, CString}, | ||
| mem, | ||
| os::raw, | ||
| sync::Arc, | ||
| }; | ||
|
|
||
| #[repr(i32)] | ||
| #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord)] | ||
| pub enum SizeHint { | ||
| None = 0, | ||
| Min = 1, | ||
| Max = 2, | ||
| Fixed = 3, | ||
| } | ||
|
|
||
| /// Webview wrapper | ||
| #[derive(Clone)] | ||
| pub struct Webview { | ||
| inner: Arc<webview_t>, | ||
| } | ||
|
|
||
| unsafe impl Send for Webview {} | ||
| unsafe impl Sync for Webview {} | ||
|
|
||
| impl Drop for Webview { | ||
| fn drop(&mut self) { | ||
| if Arc::strong_count(&self.inner) == 0 { | ||
| unsafe { | ||
| webview_terminate(*self.inner); | ||
| webview_destroy(*self.inner); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Webview { | ||
| /// Navigate to a url | ||
| pub fn navigate(&self, url: &str) { | ||
| let url = std::ffi::CString::new(url).unwrap(); | ||
| unsafe { | ||
| webview_navigate(*self.inner, url.as_ptr() as _); | ||
| } | ||
| } | ||
|
|
||
| /// Set the html content of the weview window | ||
| pub fn set_html(&self, html: &str) { | ||
| // MS Edge chromium based also requires utf-8 | ||
| self.navigate(&(String::from("data:text/html;charset=utf-8,") + html)); | ||
| } | ||
|
|
||
| /// Injects JavaScript code at the initialization of the new page | ||
| pub fn init(&self, js: &str) { | ||
| let js = CString::new(js).unwrap(); | ||
| unsafe { | ||
| webview_init(*self.inner, js.as_ptr()); | ||
| } | ||
| } | ||
|
|
||
| /// Evaluates arbitrary JavaScript code. Evaluation happens asynchronously | ||
| pub fn eval(&self, js: &str) { | ||
| let js = CString::new(js).unwrap(); | ||
| unsafe { | ||
| webview_eval(*self.inner, js.as_ptr()); | ||
| } | ||
| } | ||
|
|
||
| /// Posts a function to be executed on the main thread | ||
| pub fn dispatch<F>(&mut self, f: F) | ||
| where | ||
| F: FnOnce(Webview) + Send + 'static, | ||
| { | ||
| let closure = Box::into_raw(Box::new(f)); | ||
| extern "C" fn callback<F>(webview: webview_t, arg: *mut raw::c_void) | ||
| where | ||
| F: FnOnce(Webview) + Send + 'static, | ||
| { | ||
| let webview = Webview { | ||
| inner: Arc::new(webview), | ||
| }; | ||
| let closure: Box<F> = unsafe { Box::from_raw(arg as *mut F) }; | ||
| (*closure)(webview); | ||
| } | ||
| unsafe { webview_dispatch(*self.inner, Some(callback::<F>), closure as *mut _) } | ||
| } | ||
|
|
||
| /// Binds a native C callback so that it will appear under the given name as a global JavaScript function | ||
| pub fn bind<F>(&self, name: &str, f: F) | ||
| where | ||
| F: FnMut(&str, &str), | ||
| { | ||
| let name = CString::new(name).unwrap(); | ||
| let closure = Box::new(f); | ||
| extern "C" fn callback<F: FnMut(&str, &str)>( | ||
| seq: *const raw::c_char, | ||
| req: *const raw::c_char, | ||
| arg: *mut raw::c_void, | ||
| ) { | ||
| let seq = unsafe { | ||
| CStr::from_ptr(seq) | ||
| .to_str() | ||
| .expect("No null bytes in parameter seq") | ||
| }; | ||
| let req = unsafe { | ||
| CStr::from_ptr(req) | ||
| .to_str() | ||
| .expect("No null bytes in parameter req") | ||
| }; | ||
| let mut f: Box<F> = unsafe { Box::from_raw(arg as *mut F) }; | ||
| (*f)(seq, req); | ||
| mem::forget(f); | ||
| } | ||
| unsafe { | ||
| webview_bind( | ||
| *self.inner, | ||
| name.as_ptr(), | ||
| Some(callback::<F>), | ||
| Box::into_raw(closure) as *mut _, | ||
| ) | ||
| }; | ||
| } | ||
|
|
||
| /// Unbinds a native C callback so that it will appear under the given name as a global JavaScript function | ||
| pub fn unbind(&self, name: &str) { | ||
| let name = CString::new(name).unwrap(); | ||
| let _move = move || unsafe { webview_unbind(*self.inner, name.as_ptr()) }; | ||
| _move(); | ||
| } | ||
|
|
||
| /// Allows to return a value from the native binding. | ||
| pub fn return_(&self, seq: &str, status: i32, result: &str) { | ||
| let seq = CString::new(seq).unwrap(); | ||
| let result = CString::new(result).unwrap(); | ||
| unsafe { webview_return(*self.inner, seq.as_ptr(), status, result.as_ptr()) } | ||
| } | ||
|
|
||
| /// Set the size of the webview window | ||
| pub fn set_size(&self, width: i32, height: i32, hints: SizeHint) { | ||
| unsafe { webview_set_size(*self.inner, width, height, hints as i32) } | ||
| } | ||
|
|
||
| /// Create a Webview from an `Arc<webview_t>` | ||
| pub fn from_raw(inner: Arc<webview_t>) -> Webview { | ||
| Self { | ||
| inner | ||
| } | ||
| } | ||
| } | ||
| pub use wv_sys::*; |
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