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lib/ckeditor4/plugins/autosave/plugin.js

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+/**
+ * @license Copyright (c) CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.html or http://ckeditor.com/license
+ */
+
+(function () {
+    if (!supportsLocalStorage()) {
+        return;
+    }
+
+    CKEDITOR.plugins.add("autosave", {
+        lang: ['de', 'en', 'zh', 'zh-cn'],
+        init: function (editor) {
+            var autoSaveKey = editor.config.autosave_SaveKey != null ? autosave_SaveKey : 'autosave' + editor.id;
+
+            // Checks If there is data available and load it
+            if (localStorage.getItem(autoSaveKey)) {
+
+                var autoSavedContent = localStorage.getItem(autoSaveKey);
+                var editorLoadedContent = editor.getData();
+
+                // check if the loaded editor content is the same as the autosaved content
+                if (editorLoadedContent == autoSavedContent) {
+
+                    localStorage.removeItem(autoSaveKey);
+
+                    return;
+                }
+
+                if (confirm(editor.lang.autosave.loadSavedContent)) {
+                    if (editor.plugins.bbcode) {
+                        editor._.data = autoSavedContent;
+                    } else {
+                        editor.setData(autoSavedContent);
+                    }
+                }
+
+                localStorage.removeItem(autoSaveKey);
+            }
+
+            editor.on('key', startTimer);
+        }
+    });
+
+    var timeOutId = 0,
+        savingActive = false;
+
+    var startTimer = function (event) {
+        if (timeOutId) {
+            clearTimeout(timeOutId);
+        }
+        var delay = CKEDITOR.config.autosave_delay != null ? CKEDITOR.config.autosave_delay : 10;
+        timeOutId = setTimeout(onTimer, delay * 1000, event);
+    };
+    var onTimer = function (event) {
+        if (savingActive) {
+            startTimer(event);
+        } else if (event.editor.checkDirty() || event.editor.plugins.bbcode) {
+            savingActive = true;
+            var editor = event.editor,
+                autoSaveKey = event.editor.config.autosave_SaveKey != null ? autosave_SaveKey : 'autosave' + event.editor.id;
+
+            // save content
+            localStorage.setItem(autoSaveKey, editor.getData());
+
+            savingActive = false;
+        }
+    };
+
+    // localStorage detection
+    function supportsLocalStorage() {
+        return typeof (Storage) !== 'undefined';
+    }
+})();