Remove gui dependencies from alacritty_terminal

This commit removes font dependency from alacritty_terminal,
so it'll simplify the usage of alacritty_terminal as a library,
since you won't link to system's libraries anymore. It also
moves many alacritty related config options from it.

Fixes #3393.

1 files changed, 64 insertions, 0 deletions

diff --git a/alacritty/src/config/debug.rs b/alacritty/src/config/debug.rs
new file mode 100644
index 00000000..62de0500
--- /dev/null
+++ b/alacritty/src/config/debug.rs
@@ -0,0 +1,64 @@
+use log::{error, LevelFilter};
+use serde::{Deserialize, Deserializer};
+
+use alacritty_terminal::config::{failure_default, LOG_TARGET_CONFIG};
+
+/// Debugging options.
+#[serde(default)]
+#[derive(Deserialize, Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Debug {
+    #[serde(default = "default_log_level", deserialize_with = "deserialize_log_level")]
+    pub log_level: LevelFilter,
+
+    #[serde(deserialize_with = "failure_default")]
+    pub print_events: bool,
+
+    /// Keep the log file after quitting.
+    #[serde(deserialize_with = "failure_default")]
+    pub persistent_logging: bool,
+
+    /// Should show render timer.
+    #[serde(deserialize_with = "failure_default")]
+    pub render_timer: bool,
+
+    /// Record ref test.
+    #[serde(skip)]
+    pub ref_test: bool,
+}
+
+impl Default for Debug {
+    fn default() -> Self {
+        Self {
+            log_level: default_log_level(),
+            print_events: Default::default(),
+            persistent_logging: Default::default(),
+            render_timer: Default::default(),
+            ref_test: Default::default(),
+        }
+    }
+}
+
+fn default_log_level() -> LevelFilter {
+    LevelFilter::Warn
+}
+
+fn deserialize_log_level<'a, D>(deserializer: D) -> Result<LevelFilter, D::Error>
+where
+    D: Deserializer<'a>,
+{
+    Ok(match failure_default::<D, String>(deserializer)?.to_lowercase().as_str() {
+        "off" | "none" => LevelFilter::Off,
+        "error" => LevelFilter::Error,
+        "warn" => LevelFilter::Warn,
+        "info" => LevelFilter::Info,
+        "debug" => LevelFilter::Debug,
+        "trace" => LevelFilter::Trace,
+        level => {
+            error!(
+                target: LOG_TARGET_CONFIG,
+                "Problem with config: invalid log level {}; using level Warn", level
+            );
+            default_log_level()
+        },
+    })
+}