From 6d29b81537b9a6b32bd5415d0c4ff3323faa51a0 Mon Sep 17 00:00:00 2001
From: zuber <marek@stepniowski.com>
Date: Fri, 25 Sep 2009 18:24:05 +0200
Subject: [PATCH] Uproszczenie implementacji wzorca observer.

---
 project/static/js/app.js       | 81 +++++++++++++++++++++++-----------
 project/static/js/views/xml.js | 45 ++++++++++---------
 2 files changed, 79 insertions(+), 47 deletions(-)

diff --git a/project/static/js/app.js b/project/static/js/app.js
index 2530ee1a..7586f3fb 100644
--- a/project/static/js/app.js
+++ b/project/static/js/app.js
@@ -111,9 +111,9 @@ var Model = Class.extend({
   signal: function(event, data) {
     console.log('signal', this, event, data);
     if (this.observers[event]) {
-      for (var i=0; i < this.observers[event].length; i++) {
-        this.observers[event][i].handle(event, data);
-      };
+      for (observer in this.observers[event]) {
+        observer.handle(event, data);
+      }
     };
     return this;
   },
@@ -122,7 +122,7 @@ var Model = Class.extend({
     if (!this.observers[event]) {
       this.observers[event] = [];
     }
-    this.observers[event].push(observer);
+    this.observers[event][observer] = observer;
     return this;
   },
   
@@ -132,20 +132,41 @@ var Model = Class.extend({
         this.removeObserver(observer, e);
       }
     } else {
-      for (var i=0; i < this.observers[event].length; i++) {
-        if (this.observers[event][i] === observer) {
-          this.observers[event].splice(i, 1);
-        }
-      }
+      delete this.observers[event][observer];
     }
     return this;
   }
+});
+
+
+var XMLModel = Model.extend({
+  parent: null,
+  data: null,
+  serverURL: null,
+  
+  init: function(parent, serverURL) {
+    this.parent = parent;
+    this.serverURL = serverURL;
+  },
+  
+  reload: function() {
+    $.ajax({
+      url: this.serverURL,
+      dataType: 'text',
+      success: this.reloadSucceeded.bind(this)
+    });
+  },
+  
+  reloadSucceeded: function(data) {
+    this.data = data;
+    this.signal('reloaded');
+  },
 })
 
 var DocumentModel = Model.extend({
   data: null, // name, text_url, latest_rev, latest_shared_rev, parts_url, dc_url, size
-  xml: '',
-  html: '',
+  xml: null,
+  html: null,
   
   init: function() {},
   
@@ -167,28 +188,38 @@ var DocumentModel = Model.extend({
     }
   },
   
-  getXML: function(callback) {
-    this.signal('xml-freeze');
+  load: function(key) {
     if (!this.data) {
-      this.getData(this.getXML);
+      this.getData(function() { this.load(key); }.bind(this));
     } else {
-      console.log('getXML:', this.data.text_url);
+      console.log('load', key, this.data[key + 'url']);
       $.ajax({
-        cache: false,
-        url: this.data.text_url,
+        url: this.data[key + '_url'],
         dataType: 'text',
-        success: this.successfulGetXML.bind(this, callback)
+        success: this.loadSucceeded.bind(this, key)
       });
-    };
+    }
   },
   
-  successfulGetXML: function(callback, data) {
-    if (data != this.xml) {
-      this.xml = data;
-      this.signal('changed');
-      this.signal('xml-changed');
+  loadSucceeded: function(key, data) {
+    console.log('loadSucceeded', key, data);
+    this.set(key, data);
+  },
+  
+  get: function(key) {
+    console.log(this[key]);
+    if (this[key]) {
+      return this[key]
+    } else {
+      this.load(key);
+      return '';
     }
-    this.signal('xml-unfreeze');
+  },
+  
+  set: function(key, value) {
+    this[key] = value;
+    this.signal(key + '-changed');
+    return this;
   }
 });
 
diff --git a/project/static/js/views/xml.js b/project/static/js/views/xml.js
index de3131c8..333b1c2b 100644
--- a/project/static/js/views/xml.js
+++ b/project/static/js/views/xml.js
@@ -8,15 +8,12 @@ var XMLView = View.extend({
   init: function(element, model, template) {
     this.element = $(element);
     this.model = $(model).get(0);
-    console.log('XMLView#init model:', model);
     this.template = template || this.template;
     this.element.html(render_template(this.template, {}));
     
-    $(this.model)
-      .bind('modelxmlfreeze.xmlview',
-        function() { this.freeze('Ładowanie danych z serwera...'); }.bind(this))
-      .bind('modelxmlunfreeze.xmlview',
-        this.unfreeze.bind(this));
+    this.model
+      .addObserver(this, 'xml-freeze')
+      .addObserver(this, 'xml-unfreeze');
     
     this.freeze('Ładowanie edytora...');
   	this.editor = new CodeMirror($('.xmlview', this.element).get(0), {
@@ -27,38 +24,42 @@ var XMLView = View.extend({
       textWrapping: false,
       tabMode: 'spaces',
       indentUnit: 0,
-      // onChange: function() {
-      //        self.fireEvent('contentChanged');
-      // },
+      onChange: this.changed.bind(this),
       initCallback: this.editorDidLoad.bind(this)
     });
   },
   
+  changed: function() {
+    this.model.set('text', this.editor.getCode());
+  },
+  
   editorDidLoad: function(editor) {
-    console.log('init', this.model);
-    editor.setCode('Ładowanie...');
+    editor.setCode('Ładowanie edytora...');
     $(editor.frame).css({width: '100%', height: '100%'});
-    this.editor.setCode(this.model.xml);
-    $(this.model).bind('modelxmlchanged.xmlview', this.codeChanged.bind(this));
+    this.editor.setCode(this.model.get('text'));
+    this.model.addObserver(this, 'text-changed');
     this.unfreeze();
-    this.model.getXML();
     // editor.grabKeys(
     //   $.fbind(self, self.hotkeyPressed),
     //   $.fbind(self, self.isHotkey)
     // );
   },
   
-  codeChanged: function() {
-    console.log('setCode:', this.editor, this.model);
-    this.editor.setCode(this.model.xml);
-    this.unfreeze();
+  handle: function(event, data) {
+    console.log('handle', this, event, data);
+    if (event == 'text-changed') {
+      this.freeze('Niezsynchronizowany');
+      // this.unfreeze();      
+    } else if (event == 'xml-freeze') {
+      this.freeze('Ładowanie XMLa...');
+    } else if (event == 'xml-unfreeze') {
+      this.editor.setCode(this.model.get('text'));
+      this.unfreeze();
+    }
   },
   
   dispose: function() {
-    $(this.model)
-      .unbind('modelxmlchanged.xmlview')
-      .unbind('modelxmlfreeze.xmlview')
-      .unbind('modelxmlunfreeze.xmlview');
+    this.model.removeObserver(this);
     $(this.editor.frame).remove();
     this._super();
   }
-- 
2.20.1