From d7a59810484015eda26ab34938512c54f6477d4e Mon Sep 17 00:00:00 2001
From: Tom Crayford <tcrayford@googlemail.com>
Date: Sun, 8 Jan 2017 21:09:02 +0000
Subject: print glutin events if --print-events is passed

When debugging many issues, it's often very helpful to have the raw
glutin events printed out to stderr as they come in. This does that.

Note that since `glutin::Event` doesn't implement `Display`, we just use
rust's debugging output for now via `{:?}`.
---
 src/event.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/event.rs')

diff --git a/src/event.rs b/src/event.rs
index bdfe2708..03d0ef7f 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -9,6 +9,7 @@ use parking_lot::MutexGuard;
 use glutin::{self, ElementState};
 
 use config::Config;
+use cli::Options;
 use display::OnResize;
 use index::{Line, Column, Side};
 use input::{self, ActionContext, MouseBinding, KeyBinding};
@@ -58,6 +59,7 @@ impl Default for Mouse {
 pub struct Processor<N> {
     key_bindings: Vec<KeyBinding>,
     mouse_bindings: Vec<MouseBinding>,
+    print_events: bool,
     notifier: N,
     mouse: Mouse,
     resize_tx: mpsc::Sender<(u32, u32)>,
@@ -83,6 +85,7 @@ impl<N: Notify> Processor<N> {
     pub fn new(
         notifier: N,
         resize_tx: mpsc::Sender<(u32, u32)>,
+        options: &Options,
         config: &Config,
         ref_test: bool,
         size_info: SizeInfo,
@@ -90,6 +93,7 @@ impl<N: Notify> Processor<N> {
         Processor {
             key_bindings: config.key_bindings().to_vec(),
             mouse_bindings: config.mouse_bindings().to_vec(),
+            print_events: options.print_events,
             notifier: notifier,
             resize_tx: resize_tx,
             ref_test: ref_test,
@@ -184,6 +188,9 @@ impl<N: Notify> Processor<N> {
             // Convenience macro which curries most arguments to handle_event.
             macro_rules! process {
                 ($event:expr) => {
+                    if self.print_events {
+                        err_println!("glutin event: {:?}", $event);
+                    }
                     Processor::handle_event(
                         &mut processor,
                         $event,
-- 
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