From a64bff6aabd5330b72bcf42a6473ea9f468864ab Mon Sep 17 00:00:00 2001
From: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
Date: Fri, 16 Aug 2019 17:59:43 +0000
Subject: [PATCH] button: Add const qualifiers where needed

---
 eek/eek-keyboard.h | 2 +-
 eek/eek-renderer.c | 6 +++---
 src/layout.h       | 2 +-
 src/layout.rs      | 4 ++--
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/eek/eek-keyboard.h b/eek/eek-keyboard.h
index bea57c8f..af4c68af 100644
--- a/eek/eek-keyboard.h
+++ b/eek/eek-keyboard.h
@@ -67,7 +67,7 @@ struct squeek_button *eek_keyboard_find_button_by_name(LevelKeyboard *keyboard,
 /// Represents the path to the button within a view
 struct button_place {
     struct squeek_row *row;
-    struct squeek_button *button;
+    const struct squeek_button *button;
 };
 
 struct button_place eek_keyboard_get_button_by_state(struct squeek_view *view,
diff --git a/eek/eek-renderer.c b/eek/eek-renderer.c
index 28ef1daf..0e96056d 100644
--- a/eek/eek-renderer.c
+++ b/eek/eek-renderer.c
@@ -76,7 +76,7 @@ extern void _eek_rounded_polygon               (cairo_t     *cr,
 
 static void eek_renderer_real_render_button_label (EekRenderer *self,
                                                 PangoLayout *layout,
-                                                struct squeek_button *button);
+                                                const struct squeek_button *button);
 
 static void invalidate                         (EekRenderer *renderer);
 static void render_button                         (EekRenderer *self,
@@ -185,7 +185,7 @@ render_keyboard_surface (EekRenderer *renderer, struct squeek_view *view)
 static void
 render_button_outline (EekRenderer *renderer,
                     cairo_t     *cr,
-                    struct squeek_button *button,
+                    const struct squeek_button *button,
                     gboolean     active)
 {
     EekRendererPrivate *priv = eek_renderer_get_instance_private (renderer);
@@ -368,7 +368,7 @@ eek_renderer_apply_transformation_for_button (EekRenderer *self,
 static void
 eek_renderer_real_render_button_label (EekRenderer *self,
                                     PangoLayout *layout,
-                                    struct squeek_button *button)
+                                    const struct squeek_button *button)
 {
     EekRendererPrivate *priv = eek_renderer_get_instance_private (self);
 
diff --git a/src/layout.h b/src/layout.h
index 7a5c0807..dc2b9661 100644
--- a/src/layout.h
+++ b/src/layout.h
@@ -52,7 +52,7 @@ void squeek_button_set_bounds(struct squeek_button* button, EekBounds bounds);
 
 struct squeek_symbol *squeek_button_get_symbol (
     const struct squeek_button *button);
-struct squeek_key *squeek_button_get_key(struct squeek_button*);
+struct squeek_key *squeek_button_get_key(const struct squeek_button*);
 uint32_t *squeek_button_has_key(const struct squeek_button* button,
                                 const struct squeek_key *key);
 void squeek_button_print(const struct squeek_button* button);
diff --git a/src/layout.rs b/src/layout.rs
index 2e7a0fe4..c112dd9a 100644
--- a/src/layout.rs
+++ b/src/layout.rs
@@ -263,9 +263,9 @@ pub mod c {
     #[no_mangle]
     pub extern "C"
     fn squeek_button_get_key(
-        button: *mut ::layout::Button
+        button: *const ::layout::Button
     ) -> ::keyboard::c::CKeyState {
-        let button = unsafe { &mut *button };
+        let button = unsafe { &*button };
         ::keyboard::c::CKeyState::wrap(button.state.clone())
     }