Release owned pointer when dropping PopplerDocument and PopplerPage (#12

)

Co-authored-by: Denys Vitali <[email protected]>

Cargo.toml

@@ -16,3 +16,4 @@ render = ["dep:cairo-rs"]
 [dependencies]
 cairo-rs = { version = "0.18.5", features = ["png", "pdf"], optional = true }
 glib = "0.18.5"
+gobject-sys = "0.15"

src/lib.rs

@@ -125,6 +125,14 @@ impl PopplerDocument {
     }
 }
 
+impl Drop for PopplerDocument {
+    fn drop(&mut self) {
+        unsafe {
+            gobject_sys::g_object_unref(self.0 as *mut gobject_sys::GObject);
+        }
+    }
+}
+
 impl PopplerPage {
     pub fn get_size(&self) -> (f64, f64) {
         let mut width: f64 = 0.0;
@@ -182,6 +190,14 @@ impl<'a> Iterator for PagesIter<'a> {
     }
 }
 
+impl Drop for PopplerPage {
+    fn drop(&mut self) {
+        unsafe {
+            gobject_sys::g_object_unref(self.0 as *mut gobject_sys::GObject);
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use crate::PopplerDocument;
@@ -226,7 +242,6 @@ mod tests {
                 ctx.show_page().unwrap();
             })(&ctx);
         }
-        // g_object_unref (page);
         //surface.write_to_png("file.png");
         #[cfg(feature = "render")]
         surface.finish();