Integrate the new HTML printing with Evcxr

* Add optional feature for Evcxr integration
* Implement trait for everything which can be converted into a
    Tableslice. The trait prints the Tableslice in plain-text and HTML
    format in a Evcxr compatible manner.

1 files changed, 30 insertions, 0 deletions

diff --git a/src/evcxr.rs b/src/evcxr.rs
new file mode 100644
index 0000000..11d632a
--- /dev/null
+++ b/src/evcxr.rs
@@ -0,0 +1,30 @@
+//! This modules contains traits and implementations to work within Evcxr
+
+use super::TableSlice;
+use super::utils::StringWriter;
+use std::io::Write;
+
+/// Evcxr specific output trait
+pub trait EvcxrDisplay {
+    /// Print self in one or multiple Evcxr compatile types.
+    fn evcxr_display(&self);
+}
+
+impl<'a, T> EvcxrDisplay for T
+where
+    T: AsRef<TableSlice<'a>>,
+{
+    fn evcxr_display(&self) {
+        let mut writer = StringWriter::new();
+        // Plain Text
+        let _ = writer.write_all(b"EVCXR_BEGIN_CONTENT text/plain\n");
+        let _ = self.as_ref().print(&mut writer);
+        let _ = writer.write_all(b"\nEVCXR_END_CONTENT\n");
+
+        // Html
+        let _ = writer.write_all(b"EVCXR_BEGIN_CONTENT text/html\n");
+        let _ = self.as_ref().print_html(&mut writer);
+        let _ = writer.write_all(b"\nEVCXR_END_CONTENT\n");
+        println!("{}", writer.as_string());
+    }
+}