emscripten: add general features to lib

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/emscripten.nit b/lib/emscripten.nit
index 65fe1f4..7fc5e76 100644 (file)
--- a/lib/emscripten.nit
+++ b/lib/emscripten.nit
@@ -15,3 +15,16 @@
 # limitations under the License.
 
 module emscripten is platform
+
+`{
+       #include <emscripten.h>
+`}
+
+redef class String
+       fun run_js do run_js_native(self.escape_to_js.to_cstring)
+       private fun run_js_native(script: NativeString) `{ emscripten_run_script(script); `}
+
+       fun escape_to_js: String do return self.replace('\n', "\\n")
+
+       fun alert do "alert('{self.escape_to_js}')".run_js
+end