1 files changed, 101 insertions, 0 deletions
diff --git a/devtools/client/jsonview/utils.js b/devtools/client/jsonview/utils.js
new file mode 100644
index 000000000..a70afdc68
--- /dev/null
+++ b/devtools/client/jsonview/utils.js
@@ -0,0 +1,101 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const { Cu, Cc, Ci } = require("chrome");
+const Services = require("Services");
+const { getMostRecentBrowserWindow } = require("sdk/window/utils");
+
+const OPEN_FLAGS = {
+  RDONLY: parseInt("0x01", 16),
+  WRONLY: parseInt("0x02", 16),
+  CREATE_FILE: parseInt("0x08", 16),
+  APPEND: parseInt("0x10", 16),
+  TRUNCATE: parseInt("0x20", 16),
+  EXCL: parseInt("0x80", 16)
+};
+
+/**
+ * Open File Save As dialog and let the user to pick proper file location.
+ */
+exports.getTargetFile = function () {
+  let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+
+  let win = getMostRecentBrowserWindow();
+  fp.init(win, null, Ci.nsIFilePicker.modeSave);
+  fp.appendFilter("JSON Files", "*.json; *.jsonp;");
+  fp.appendFilters(Ci.nsIFilePicker.filterText);
+  fp.appendFilters(Ci.nsIFilePicker.filterAll);
+  fp.filterIndex = 0;
+
+  let rv = fp.show();
+  if (rv == Ci.nsIFilePicker.returnOK || rv == Ci.nsIFilePicker.returnReplace) {
+    return fp.file;
+  }
+
+  return null;
+};
+
+/**
+ * Save JSON to a file
+ */
+exports.saveToFile = function (file, jsonString) {
+  let foStream = Cc["@mozilla.org/network/file-output-stream;1"]
+    .createInstance(Ci.nsIFileOutputStream);
+
+  // write, create, truncate
+  let openFlags = OPEN_FLAGS.WRONLY | OPEN_FLAGS.CREATE_FILE |
+    OPEN_FLAGS.TRUNCATE;
+
+  let permFlags = parseInt("0666", 8);
+  foStream.init(file, openFlags, permFlags, 0);
+
+  let converter = Cc["@mozilla.org/intl/converter-output-stream;1"]
+    .createInstance(Ci.nsIConverterOutputStream);
+
+  converter.init(foStream, "UTF-8", 0, 0);
+
+  // The entire jsonString can be huge so, write the data in chunks.
+  let chunkLength = 1024 * 1204;
+  for (let i = 0; i <= jsonString.length; i++) {
+    let data = jsonString.substr(i, chunkLength + 1);
+    if (data) {
+      converter.writeString(data);
+    }
+    i = i + chunkLength;
+  }
+
+  // this closes foStream
+  converter.close();
+};
+
+/**
+ * Get the current theme from preferences.
+ */
+exports.getCurrentTheme = function () {
+  return Services.prefs.getCharPref("devtools.theme");
+};
+
+/**
+ * Export given object into the target window scope.
+ */
+exports.exportIntoContentScope = function (win, obj, defineAs) {
+  let clone = Cu.createObjectIn(win, {
+    defineAs: defineAs
+  });
+
+  let props = Object.getOwnPropertyNames(obj);
+  for (let i = 0; i < props.length; i++) {
+    let propName = props[i];
+    let propValue = obj[propName];
+    if (typeof propValue == "function") {
+      Cu.exportFunction(propValue, clone, {
+        defineAs: propName
+      });
+    }
+  }
+};