仅保存20条记录, ctrl+s, ctrl+e时保存历史记录. 自动保存时不添加到历史记录中

https://github.com/leanote/desktop-app/issues/70

public/js/app/note.js

@@ -499,7 +499,7 @@ Note.curChangedSaveIt = function(force, callback) {
 			}
 
 			callback && callback(ret);
-		});
+		}, force);
 
 		return hasChanged;
 
@@ -676,7 +676,7 @@ Note.changeNote = function(selectNoteId, isShare, needSaveChanged, callback) {
 		needSaveChanged  = true;
 	}
 	if(needSaveChanged) {
-		Note.curChangedSaveIt();
+		Note.curChangedSaveIt(true);
 	}
 
 	// 2. 设空, 防止在内容得到之前又发生保存
@@ -1095,7 +1095,7 @@ Note.newNote = function(notebookId, isShare, fromUserId, isMarkdown) {
 
 	Note.stopInterval();
 	// 保存当前的笔记
-	Note.curChangedSaveIt();
+	Note.curChangedSaveIt(true);
 
 	Note.batch.reset();
 
@@ -1789,13 +1789,12 @@ Note.toggleReadOnly = function(needSave) {
 
 	// 保存之
 	if (needSave) {
-		Note.curChangedSaveIt();
+		Note.curChangedSaveIt(true);
 	}
 	
 	Note.readOnly = true;
 	LEA.readOnly = true;
 
-
 	if(!note.IsMarkdown) {
 		// 里面的pre也设为不可写
 		$('#editorContent pre').each(function() {

public/js/dec/history.js

@@ -115,7 +115,11 @@ define(function() {
             var note = Note.getCurNote();
             me.note = note;
             NoteService.getNoteHistories(Note.curNoteId, function(re) {
-                if(!isArray(re)) {
+                if (re === false) {
+                    alert(getMsg('Load Database Error'));
+                    return;
+                }
+                if(!isArray(re) || !re.length) {
                     alert(getMsg('noHistories'));
                     return;
                 }
@@ -154,8 +158,6 @@ define(function() {
                         info.unfold = false
                     }
                 });
-
-               
             });
         },
 

public/langs/zh-cn.js

@@ -291,5 +291,7 @@
     "<span></span> notes selected": "当前选中了 <span></span> 篇笔记",
 
     "Sync error, retry to sync after 3 seconds": "同步失败, 3 秒后自动重新尝试同步",
-    "Network error!": "网络异常"
+    "Network error!": "网络异常",
+
+    "Load Database Error": "加载数据库出错, 请尝试在帐户管理中优化数据库"
 }

public/langs/zh-hk.js

@@ -291,5 +291,7 @@
     "<span></span> notes selected": "當前選中了 <span></span> 篇筆記",
 
     "Sync error, retry to sync after 3 seconds": "同步失敗, 3 秒後自動重新嘗試同步",
-    "Network error!": "網絡異常"
+    "Network error!": "網絡異常",
+
+    "Load Database Error": "加載數據庫出錯, 請嘗試在帳戶管理中優化數據庫"
 }