Adds asm.js support

.gitignore

@@ -2,3 +2,6 @@ node_modules
 build
 .DS_Store
 .clang_complete
+
+/browser.js
+emsdk_portable

.npmignore

@@ -1,3 +1,4 @@
 test
 build
 .gitignore
+emsdk_portable

.travis.yml

@@ -1,4 +1,5 @@
 language: node_js
+sudo: false
 
 notifications:
   email:
@@ -8,8 +9,17 @@ notifications:
 node_js:
   - "node"
 
+before_install:
+  - export CXX="g++-4.8" CC="gcc-4.8"
+  - curl https://cmake.org/files/v3.6/cmake-3.6.3-Linux-x86_64.tar.gz | tar xz
+  - export PATH=${PWD}/cmake-3.6.3-Linux-x86_64/bin:$PATH
+  - script/install-emscripten.sh
+
 script:
-  - "npm run ci"
+  - npm run standard
+  - npm run build:browser
+  - npm run test:browser
+  - npm run test:node
 
 git:
   depth: 10
@@ -18,7 +28,15 @@ branches:
   only:
     - master
 
-sudo: false
+cache:
+  directories:
+    - emsdk_portable
+    - $HOME/.emscripten_cache
 
-env:
-  - CXX=clang++
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - gcc-4.8
+    - g++-4.8

index.js

@@ -1,5 +1,9 @@
-try {
-  module.exports = require('./build/Release/superstring.node')
-} catch (e) {
-  module.exports = require('./build/Debug/superstring.node')
+if (process.env.SUPERSTRING_USE_BROWSER_VERSION) {
+  module.exports = require('./browser');
+} else {
+  try {
+    module.exports = require('./build/Release/superstring.node')
+  } catch (e) {
+    module.exports = require('./build/Debug/superstring.node')
+  }
 }

package.json

@@ -2,13 +2,19 @@
   "name": "superstring",
   "version": "1.1.0",
   "description": "A data structure to efficiently represent the results of applying patches.",
+  "main": "./index",
+  "browser": "./browser",
   "scripts": {
-    "test-native": "script/test-native.js",
-    "test": "mocha test/js/*.js",
+    "build:node": "node-gyp rebuild",
+    "build:browser": "script/build-browser-version.sh",
+    "build": "npm run build:node && npm run build:browser",
+    "test:native": "script/test-native.js",
+    "test:node": "mocha test/js/*.js",
+    "test:browser": "SUPERSTRING_USE_BROWSER_VERSION=1 mocha test/js/*.js",
+    "test": "npm run test:node && npm run test:browser",
     "benchmark": "node benchmark/marker-index.benchmark.js",
-    "prepublish": "npm run standard",
-    "standard": "standard --recursive src test",
-    "ci": "npm run standard && node-gyp rebuild --debug --tests && npm run test"
+    "prepublish": "not-in-install && npm run build:browser || in-install",
+    "standard": "standard --recursive src test"
   },
   "repository": {
     "type": "git",
@@ -29,6 +35,7 @@
   },
   "devDependencies": {
     "chai": "^2.0.0",
+    "in-publish": "^2.0.0",
     "mocha": "^2.3.4",
     "random-seed": "^0.2.0",
     "segfault-handler": "^1.0.0",

script/build-browser-version.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+EM_COMPILER_PATH=$(find emsdk_portable -name em++ | head -n1)
+
+echo "Running ${EM_COMPILER_PATH}"
+${EM_COMPILER_PATH}                     \
+  --bind                                \
+  -o browser.js                         \
+  -O3                                   \
+  -std=c++14                            \
+  -I src/bindings/em                    \
+  -I src/core                           \
+  --pre-js src/bindings/em/prologue.js  \
+  --post-js src/bindings/em/epilogue.js \
+  src/core/*.cc                         \
+  src/bindings/em/*.cc                  \
+  -s TOTAL_MEMORY=134217728             \
+  --memory-init-file 0                  \

script/install-emscripten.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e
+
+EMSCRIPTEN_DOWNLOAD_URL='https://s3.amazonaws.com/mozilla-games/emscripten/releases/emsdk-portable.tar.gz'
+EMSDK_PATH="./emsdk_portable/emsdk"
+
+if [ ! -f $EMSDK_PATH ]; then
+  echo 'Downloading emscripten SDK installer...'
+  curl $EMSCRIPTEN_DOWNLOAD_URL | tar xz
+fi
+
+echo 'Installing emscripten SDK...'
+
+$EMSDK_PATH update
+$EMSDK_PATH install -j4 latest
+$EMSDK_PATH activate latest

src/bindings/buffer-offset-index-wrapper.cc

@@ -1,4 +1,5 @@
 #include "buffer-offset-index-wrapper.h"
+#include "noop.h"
 #include "point-wrapper.h"
 
 using namespace v8;
@@ -8,6 +9,7 @@ void BufferOffsetIndexWrapper::init(Local<Object> exports) {
   constructor_template->SetClassName(Nan::New<String>("BufferOffsetIndex").ToLocalChecked());
   constructor_template->InstanceTemplate()->SetInternalFieldCount(1);
   const auto &prototype_template = constructor_template->PrototypeTemplate();
+  prototype_template->Set(Nan::New<String>("delete").ToLocalChecked(), Nan::New<FunctionTemplate>(noop));
   prototype_template->Set(Nan::New<String>("splice").ToLocalChecked(), Nan::New<FunctionTemplate>(splice));
   prototype_template->Set(Nan::New<String>("positionForCharacterIndex").ToLocalChecked(), Nan::New<FunctionTemplate>(position_for_character_index));
   prototype_template->Set(Nan::New<String>("characterIndexForPosition").ToLocalChecked(), Nan::New<FunctionTemplate>(character_index_for_position));

src/bindings/em/as.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <emscripten/val.h>
+
+#include "patch.h"
+
+template<> inline Patch const * emscripten::val::as<Patch const *>(void) const {
+    using namespace emscripten;
+    using namespace internal;
+
+    EM_DESTRUCTORS destructors;
+    EM_GENERIC_WIRE_TYPE result = _emval_as(handle, TypeID<AllowedRawPointer<Patch const>>::get(), &destructors);
+    DestructorsRunner dr(destructors);
+    return fromGenericWireType<Patch *>(result);
+}