[librsvg/wip/rust-api] CairoRenderer: add a get_geometry_for_element() method

[Federico Mena Quintero <federico src gnome org>]

commit cd9d2cb301022fc34e105737e7fd71eceb94ae72
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Feb 18 11:29:02 2019 -0600

    CairoRenderer: add a get_geometry_for_element() method

 librsvg_crate/src/lib.rs          | 11 +++++++++++
 rsvg_internals/src/drawing_ctx.rs | 11 +++++++++++
 rsvg_internals/src/handle.rs      |  2 +-
 rsvg_internals/src/lib.rs         |  2 ++
 4 files changed, 25 insertions(+), 1 deletion(-)
---
diff --git a/librsvg_crate/src/lib.rs b/librsvg_crate/src/lib.rs
index 6f5a8a88..0d7d3ebc 100644
--- a/librsvg_crate/src/lib.rs
+++ b/librsvg_crate/src/lib.rs
@@ -143,6 +143,17 @@ impl<'a> CairoRenderer<'a> {
             .map(|dimensions| (dimensions.width, dimensions.height))
     }
 
+    /// Returns (ink_rect, logical_rect)
+    pub fn get_geometry_for_element(
+        &self,
+        id: Option<&str>,
+    ) -> Result<(cairo::Rectangle, cairo::Rectangle), RenderingError> {
+        self.handle
+            .0
+            .get_geometry_sub(id)
+            .map(|(i, l)| (i.into(), l.into()))
+    }
+
     pub fn render(&self, cr: &cairo::Context) -> Result<(), RenderingError> {
         self.handle.0.render_cairo_sub(cr, None)
     }
diff --git a/rsvg_internals/src/drawing_ctx.rs b/rsvg_internals/src/drawing_ctx.rs
index fadc9be1..6f8df89c 100644
--- a/rsvg_internals/src/drawing_ctx.rs
+++ b/rsvg_internals/src/drawing_ctx.rs
@@ -905,6 +905,17 @@ impl From<cairo::Rectangle> for RsvgRectangle {
     }
 }
 
+impl From<RsvgRectangle> for cairo::Rectangle {
+    fn from(r: RsvgRectangle) -> cairo::Rectangle {
+        cairo::Rectangle {
+            x: r.x,
+            y: r.y,
+            width: r.width,
+            height: r.height,
+        }
+    }
+}
+
 pub struct AcquiredNode(Rc<RefCell<Vec<RsvgNode>>>, RsvgNode);
 
 impl Drop for AcquiredNode {
diff --git a/rsvg_internals/src/handle.rs b/rsvg_internals/src/handle.rs
index 1e9af90c..4859dafb 100644
--- a/rsvg_internals/src/handle.rs
+++ b/rsvg_internals/src/handle.rs
@@ -410,7 +410,7 @@ impl Handle {
     }
 
     /// Returns (ink_rect, logical_rect)
-    fn get_geometry_sub(
+    pub fn get_geometry_sub(
         &self,
         id: Option<&str>,
     ) -> Result<(RsvgRectangle, RsvgRectangle), RenderingError> {
diff --git a/rsvg_internals/src/lib.rs b/rsvg_internals/src/lib.rs
index cbdabfd1..ee22d16f 100644
--- a/rsvg_internals/src/lib.rs
+++ b/rsvg_internals/src/lib.rs
@@ -44,6 +44,8 @@ pub use color::{rsvg_css_parse_color, ColorKind, ColorSpec};
 
 pub use dpi::{rsvg_rust_set_default_dpi_x_y, Dpi};
 
+pub use drawing_ctx::RsvgRectangle;
+
 pub use error::{rsvg_rust_error_quark, LoadingError, RenderingError};
 
 pub use handle::{