[librsvg] drawing_ctx.rs: Bind get_pango_context() to Rust

[Federico Mena Quintero <federico src gnome org>]

commit bed85586a257c8fe25a0f3a61e38bb8fe958ddab
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Dec 14 14:05:04 2017 -0600

    drawing_ctx.rs: Bind get_pango_context() to Rust

 rust/src/drawing_ctx.rs | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)
---
diff --git a/rust/src/drawing_ctx.rs b/rust/src/drawing_ctx.rs
index e5b0b40..77e0257 100644
--- a/rust/src/drawing_ctx.rs
+++ b/rust/src/drawing_ctx.rs
@@ -1,8 +1,10 @@
-use ::cairo;
-use ::cairo_sys;
-use ::glib_sys;
-use ::glib::translate::*;
-use ::libc;
+use cairo;
+use cairo_sys;
+use glib_sys;
+use glib::translate::*;
+use libc;
+use pango_sys;
+use pango;
 
 use color::*;
 use error::*;
@@ -46,6 +48,8 @@ extern "C" {
     fn rsvg_drawing_ctx_set_current_state_affine (draw_ctx: *const RsvgDrawingCtx,
                                                   affine:   *const cairo::Matrix);
 
+    fn rsvg_drawing_ctx_get_pango_context(draw_ctx: *const RsvgDrawingCtx) -> *mut pango_sys::PangoContext;
+
     fn rsvg_drawing_ctx_add_clipping_rect (draw_ctx: *const RsvgDrawingCtx,
                                            x: f64,
                                            y: f64,
@@ -200,6 +204,12 @@ pub fn set_current_state_affine (draw_ctx: *const RsvgDrawingCtx, affine: cairo:
     }
 }
 
+pub fn get_pango_context(draw_ctx: *const RsvgDrawingCtx) -> pango::Context {
+    unsafe {
+        from_glib_full(rsvg_drawing_ctx_get_pango_context(draw_ctx))
+    }
+}
+
 pub fn add_clipping_rect (draw_ctx: *const RsvgDrawingCtx,
                           x: f64,
                           y: f64,