Add support for string escapes like \n in label texts (fixes #84)

Cargo.lock

@@ -364,6 +364,7 @@ dependencies = [
  "smart-default",
  "stoppable_thread",
  "structopt",
+ "unescape",
 ]
 
 [[package]]
@@ -2000,6 +2001,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "unescape"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccb97dac3243214f8d8507998906ca3e2e0b900bf9bf4870477f125b82e68f6e"
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.6.0"

Cargo.toml

@@ -44,6 +44,7 @@ smart-default = "0.6"
 filedescriptor = "0.7"
 simple-signal = "1.1"
 dashmap = "3.11"
+unescape = "0.1"
 
 [dev-dependencies]
 pretty_assertions = "0.6.1"

src/widgets/widget_definitions.rs

@@ -342,7 +342,9 @@ fn build_gtk_label(bargs: &mut BuilderArgs) -> Result<gtk::Label> {
         // @prop text - the text to display
         // @prop limit-width - maximum count of characters to display
         prop(text: as_string, limit_width: as_i32 = i32::MAX) {
-            gtk_widget.set_text(&text.chars().take(limit_width as usize).collect::<String>());
+            let text = text.chars().take(limit_width as usize).collect::<String>();
+            let text = unescape::unescape(&text).context(format!("Failed to unescape label text {}", &text))?;
+            gtk_widget.set_text(&text);
         },
         // @prop markup - Pango markup to display
         prop(markup: as_string) {