dom_ex_machina/
lib.rs

1use std::convert::TryFrom;
2use webkit2gtk::{SnapshotOptions, SnapshotRegion, WebView, WebViewExt, LoadEvent};
3use cairo::{ImageSurface, Format};
4use image::{ImageBuffer, DynamicImage, RgbaImage};
5
6// TODO: Remove all `unwrap`s
7
8pub trait WebViewSnapshotListener {
9    fn page_load_snapshot_listener<F: 'static + FnMut(RgbaImage) + Send + Clone>(&self, callback: F) -> &Self;
10}
11
12impl WebViewSnapshotListener for WebView {
13    fn page_load_snapshot_listener<F: 'static + FnMut(RgbaImage) + Send + Clone>(&self, callback: F) -> &Self {
14        self.connect_load_changed(move |wv, load_event| {
15            if load_event != LoadEvent::Finished {
16                return;
17            }
18
19            let mut callback = callback.clone();
20            wv.get_snapshot(
21                SnapshotRegion::FullDocument,
22                SnapshotOptions::empty(),
23                None::<&gio::Cancellable>,
24                move |snapshot| {
25                    let surface = snapshot.unwrap();
26                    let mut image_surface = ImageSurface::try_from(surface).unwrap();
27
28                    let format = image_surface.get_format();
29                    if format != Format::ARgb32 {
30                        unimplemented!("Not implemented for image type {:?} yet", format)
31                    }
32
33                    let width = image_surface.get_width() as u32;
34                    let height = image_surface.get_height() as u32;
35                    let data = image_surface.get_data().unwrap().to_vec();
36
37                    let image = DynamicImage::ImageBgra8(ImageBuffer::from_vec(width, height, data).unwrap()).to_rgba();
38
39                    callback(image);
40                },
41            );
42        });
43
44        self
45    }
46}
dom_ex_machina/lib.rs

dom_ex_machina/
lib.rs
