Progress..

Cargo.toml

@@ -23,6 +23,7 @@ pango = { git = 'https://github.com/gtk-rs/pango' }
 pango-sys = { git = 'https://github.com/gtk-rs/sys' }
 gio = { git = 'https://github.com/gtk-rs/gio' }
 pangocairo = { git = 'https://github.com/RazrFalcon/pangocairo-rs' }
+pangocairo-sys = "0.3.4"
 neovim-lib = "0.4"
 phf = "0.7"
 log = "0.3"

src/main.rs

@@ -10,6 +10,7 @@ extern crate cairo;
 extern crate pango;
 extern crate pango_sys;
 extern crate pangocairo;
+extern crate pangocairo_sys;
 extern crate neovim_lib;
 extern crate phf;
 #[macro_use]

src/render/mod.rs

@@ -14,6 +14,8 @@ pub fn render(ctx: &cairo::Context) {
    let items = pango_itemize(&pango_context, &text, 0, len, &attr_list);
    for item in items {
        let mut glyphs = pango::GlyphString::new();
-       pango_shape(&text, len, item.analysis(), &mut glyphs);
+       let analysis = item.analysis();
+       pango_shape(&text, len, &analysis, &mut glyphs);
+       let (ink, logical) = glyphs.extents(&analysis.font());
    }
 }

src/sys/pango/analysis.rs

@@ -0,0 +1,22 @@
+use pango_sys;
+use pango;
+
+use glib::translate::*;
+
+pub struct Analysis<'a>(&'a pango_sys::PangoAnalysis);
+
+impl <'a> Analysis <'a> {
+    pub fn from(analysis: &'a pango_sys::PangoAnalysis) -> Self {
+        Analysis(analysis)
+    }
+
+    pub fn font(&self) -> pango::Font {
+        unsafe {
+            from_glib_none(self.0.font)
+        }
+    }
+
+    pub fn to_glib_ptr(&self) -> *const pango_sys::PangoAnalysis {
+        self.0
+    }
+}

src/sys/pango/item.rs

@@ -6,6 +6,8 @@ use pango_sys;
 use glib_ffi;
 use glib::translate::*;
 
+use super::analysis;
+
 glib_wrapper! {
     pub struct Item(Boxed<pango_sys::PangoItem>);
 
@@ -16,7 +18,7 @@ glib_wrapper! {
 }
 
 impl Item {
-    pub fn analysis(&self) -> &pango_sys::PangoAnalysis {
-        &self.0.analysis
+    pub fn analysis(&self) -> analysis::Analysis {
+        analysis::Analysis::from(&self.0.analysis)
     }
 }

src/sys/pango/mod.rs

@@ -1,10 +1,13 @@
 mod item;
+mod analysis;
 
 use std::ptr;
 use std::ffi::CStr;
 
 use pango;
 use pango_sys;
+use cairo;
+use pangocairo_sys;
 
 use glib::translate::*;
 
@@ -30,15 +33,20 @@ pub fn pango_itemize(
 pub fn pango_shape(
     text: &CStr,
     length: usize,
-    analysis: &pango_sys::PangoAnalysis,
+    analysis: &analysis::Analysis,
     glyphs: &mut pango::GlyphString,
 ) {
     unsafe {
         pango_sys::pango_shape(
             text.as_ptr(),
             length as i32,
-            analysis as *const pango_sys::PangoAnalysis,
+            analysis.to_glib_ptr(),
             glyphs.to_glib_none_mut().0,
         );
     }
 }
+
+pub fn pango_cairo_show_glyph_string(ctx: &cairo::Context, font: &pango::Font, glyphs: &pango::GlyphString) {
+    pangocairo_sys::pango_cairo_show_glyph_string();
+}
+