lib/emscripten.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2014 Alexis Laferrière <alexis.laf@xymus.net>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Platform for the _emscripten_ framework
  18 #
  19 # Importing this module from your project will tell `nitg` to compile
  20 # to JavaScript for the _emscripten_ framework.
  21 module emscripten is platform
  22
  23 `{
  24         #include <emscripten.h>
  25         #include <gc.h>
  26 `}
  27
  28 redef class Text
  29         # Run `self` as JavaScript code
  30         fun run_js do run_js_native(self.escape_to_js.to_cstring)
  31
  32         private fun run_js_native(script: NativeString) `{ emscripten_run_script(script); `}
  33
  34         # Escape the content of `self` to pass to JavaScript code
  35         fun escape_to_js: Text do return replace('\n', "\\n")
  36
  37         # Raise a JavaScript alert
  38         fun alert do "alert('{self.escape_to_js}')".run_js
  39 end
  40
  41 redef class Sys
  42         redef fun force_garbage_collection `{ GC_FORCE_COLLECT(); `}
  43
  44         # The emscripten GC *must* be manually invoked, it will not act by itself
  45         fun suggest_garbage_collection `{ GC_MAYBE_COLLECT(); `}
  46 end