Merge pull request #392 from jamesarosen/james/legacy-tree

Include ember 1.12 support only on 1.12

addon/helper.js

@@ -1,23 +1,17 @@
 import Ember from "ember";
 
-var Helper = null;
+export default Ember.Helper.extend({
+  i18n: Ember.inject.service(),
 
-if (Ember.Helper) {
-  Helper = Ember.Helper.extend({
-    i18n: Ember.inject.service(),
+  _locale: Ember.computed.readOnly('i18n.locale'),
 
-    _locale: Ember.computed.readOnly('i18n.locale'),
+  compute: function(params, interpolations) {
+    const key = params[0];
+    const i18n = this.get('i18n');
+    return i18n.t(key, interpolations);
+  },
 
-    compute: function(params, interpolations) {
-      const key = params[0];
-      const i18n = this.get('i18n');
-      return i18n.t(key, interpolations);
-    },
-
-    _recomputeOnLocaleChange: Ember.observer('_locale', function() {
-      this.recompute();
-    })
-  });
-}
-
-export default Helper;
+  _recomputeOnLocaleChange: Ember.observer('_locale', function() {
+    this.recompute();
+  })
+});

addon/legacy/README.md

@@ -0,0 +1 @@
+This folder includes support for Ember 1.12

addon/legacy/helper.js

@@ -0,0 +1,36 @@
+import Stream from "./stream";
+import { readHash } from "./stream";
+
+export default function tHelper(params, hash, options, env) {
+  const i18n = env.data.view.container.lookup('service:i18n');
+  const i18nKey = params[0];
+
+  var out = new Stream(function() {
+    const value = i18nKey.isStream ? i18nKey.value() : i18nKey;
+    return value === undefined ? '' : i18n.t(value, readHash(hash));
+  });
+
+  // Once the view is destroyed destroy the steam as well
+  env.data.view.one('willDestroyElement', out, function() {
+    this.destroy();
+  });
+
+  // observe any hash arguments that are streams:
+  Object.keys(hash).forEach(function(key) {
+    const value = hash[key];
+
+    if (value && value.isStream) {
+      value.subscribe(out.notify, out);
+    }
+  });
+
+  // observe the locale:
+  i18n.localeStream.subscribe(out.notify, out);
+
+  // if the i18n key itself is dynamic, observe it:
+  if (i18nKey.isStream) {
+    i18nKey.subscribe(out.notify, out);
+  }
+
+  return out;
+}

addon/legacy/initializer.js

@@ -0,0 +1,23 @@
+import Ember from "ember";
+import Stream from './stream';
+import legacyHelper from "./helper";
+
+// Used for Ember < 1.13
+export default {
+  name: 'ember-i18n-legacy-helper',
+
+  initialize(registry) {
+    const i18n = registry.lookup('service:i18n');
+
+    i18n.localeStream = new Stream(function() {
+      return i18n.get('locale');
+    });
+
+    Ember.addObserver(i18n, 'locale', i18n, function() {
+      this.localeStream.value(); // force the stream to be dirty
+      this.localeStream.notify();
+    });
+
+    Ember.HTMLBars._registerHelper('t', legacyHelper);
+  }
+};

addon/legacy/stream.js

@@ -0,0 +1,11 @@
+import Ember from 'ember';
+
+// As of v1.12, Streams are still private API. Thus, we need to reach in to
+// Ember internals to get access to it.
+//
+// See https://github.com/emberjs/ember.js/blob/v1.12.0/packages/ember-metal/lib/main.js#L384-L386
+// See https://github.com/emberjs/ember.js/pull/9693
+// See https://github.com/dockyard/ember-cli-i18n/blob/v0.0.6/addon/utils/stream.js
+
+export default Ember.__loader.require('ember-metal/streams/stream')['default'];
+export const readHash = Ember.__loader.require('ember-metal/streams/utils').readHash;

app/initializers/ember-i18n-legacy-helper.js

@@ -0,0 +1,2 @@
+import initializer from 'ember-i18n/legacy/initializer';
+export default initializer;

index.js

@@ -1,8 +1,42 @@
 /* jshint node: true */
 'use strict';
+var Funnel = require('broccoli-funnel');
+var VersionChecker = require('ember-cli-version-checker');
 
 module.exports = {
   name: 'ember-i18n',
+  isLocalizationFramework: true,
 
-  isLocalizationFramework: true
+  config: function() {
+    var checker = new VersionChecker(this);
+    var dep = checker.for('ember', 'bower');
+    this.hasEmberHelper = !dep.lt('1.13.0');
+    return this._super.config.apply(this, arguments);
+  },
+
+  treeFor: function(name) {
+    var result = this._super.treeFor.apply(this, arguments);
+
+    if (this.hasEmberHelper) {
+      result = exclude(result, [
+        'initializers/ember-i18n-legacy-helper.js',
+        'modules/ember-i18n/legacy/helper.js',
+        'modules/ember-i18n/legacy/initializer.js',
+        'modules/ember-i18n/legacy/stream.js'
+      ]);
+    } else {
+      result = exclude(result, [
+        'helpers/t.js',
+        'modules/ember-i18n/helper.js'
+      ]);
+    }
+
+    return result;
+  }
 };
+
+function exclude(tree, files) {
+  return new Funnel(tree, {
+    exclude: files
+  });
+}

package.json

@@ -43,7 +43,9 @@
     "ember-addon"
   ],
   "dependencies": {
+    "broccoli-funnel": "^1.0.6",
     "ember-cli-babel": "^5.0.0",
+    "ember-cli-version-checker": "^1.1.6",
     "ember-getowner-polyfill": "^1.0.0"
   },
   "ember-addon": {