Base categories

css/style.css

@@ -43,6 +43,7 @@ li.app-item {
   transition: 150ms linear;
   position: relative;
   overflow: hidden;
+  min-width: 10%; 
 }
 
 li.app-item::after {

default-profile.json

@@ -1,9 +1,21 @@
 {
+  "items": [
+    {
+      "label": "Root",
+      "icon": "/usr/share/icons/Mint-X/apps/48/chromium-browser.png",
+      "items": [
+        {
+          "label": "Level 1",
+          "icon": "/usr/share/icons/Mint-X/apps/48/chromium-browser.png",
           "items": [
             {
               "label": "Chromium Browser",
-      "exec": "/usr/bin/chromium-browser",
-      "icon": "/usr/share/icons/Mint-X/apps/48/chromium-browser.png"
+              "icon": "/usr/share/icons/Mint-X/apps/48/chromium-browser.png",
+              "exec": "/usr/bin/chromium-browser"
+            }
+          ]
+        }
+      ]
     }
   ]
 }

index.html

@@ -9,15 +9,30 @@
     <div id="pitaya"></div>
 
     <!-- Templates -->
+
+    <script id="launcher-view-tpl" type="text/x-template">
+      {{#unless isRoot}}
+        <div class="category-header">
+          <h2><a href="#" class="goback" data-item-path="{{currentItemPath}}">&#8678;</a> {{currentItem.label}}</h2>
+        </div>
+      {{/unless}}
+      {{> itemListTpl}}
+    </script>
+
     <script id="items-list-tpl" type="text/x-template">
       <ul class="apps-list">
-        {{#each items}}
-          <li data-exec="{{exec}}" class="app-item">
+        {{#each currentItem.items}}
+          {{> itemTpl currentItemPath=../currentItemPath}}
+        {{/each}}
+      </ul>
+    </script>
+
+    <script id="item-tpl" type="text/x-template">
+      <li class="app-item"
+        data-item-path="{{currentItemPath}}.{{@index}}">
         <img class="app-icon" src="{{icon}}" />
         <span class="app-label">{{label}}</span>
       </li>
-        {{/each}}
-      </ul>
     </script>
 
     <!-- Scripts -->

js/app.js

@@ -10,8 +10,12 @@
   var gui = require('nw.gui');
   var minimist = require('minimist');
 
-  // Load templates
-  var itemsListTpl = Handlebars.compile(Pitaya.DOM.select('#items-list-tpl').innerHTML);
+  // Load templates...
+  var launcherViewTpl = Handlebars.compile(Pitaya.DOM.select('#launcher-view-tpl').innerHTML);
+
+  // ... and partials
+  Handlebars.registerPartial('itemListTpl', Pitaya.DOM.select('#items-list-tpl').innerHTML);
+  Handlebars.registerPartial('itemTpl', Pitaya.DOM.select('#item-tpl').innerHTML);
 
   // Internal constants
   var DEFAULT_PROFILE = './default-profile.json';
@@ -34,6 +38,7 @@
       .then(function() {
         return Pitaya;
       })
+      .catch(Pitaya._onError)
     ;
 
   };
@@ -48,7 +53,7 @@
     return Pitaya._loadJSONFile(profilePath)
       .then(function(profile) {
         Pitaya._profile = profile;
-        Pitaya.render();
+        Pitaya.renderLauncherView();
         return profile;
       })
     ;
@@ -59,10 +64,24 @@
    *
    * @return Pitaya
    */
-  Pitaya.render = function() {
+  Pitaya.renderLauncherView = function(currentItemPath) {
+
+    console.log('render', currentItemPath);
+
+    currentItemPath = Pitaya._normalizeItemPath(currentItemPath);
     var rootEl = Pitaya._rootEl;
-    var profile = Pitaya._profile;
-    rootEl.innerHTML = itemsListTpl(profile);
+    var currentItem = Pitaya._getItemByPath(currentItemPath);
+
+    var data = {
+      currentItemPath: currentItemPath.join('.'),
+      currentItem: currentItem,
+      isRoot: currentItemPath.length === 0
+    };
+
+    console.log('render data', data);
+
+    rootEl.innerHTML = launcherViewTpl(data);
+
   };
 
 
@@ -73,6 +92,7 @@
   Pitaya._initListeners = function() {
     var rootEl = Pitaya._rootEl;
     rootEl.addEventListener('click', Pitaya._onItemClick);
+    rootEl.addEventListener('click', Pitaya._onGoBackClick);
   };
 
   /**
@@ -87,19 +107,105 @@
 
     if( !appItemEl ) return;
 
-    var execPath = appItemEl.dataset.exec;
+    var itemPath = appItemEl.dataset.itemPath;
+    var item = Pitaya._getItemByPath(itemPath);
 
-    console.info('Launching application "'+execPath+'"...');
+    console.log('item click',itemPath, item);
 
-    if(execPath) {
-      appItemEl.classList.add('loading');
-      cp.exec(execPath, function(err) {
-        appItemEl.classList.remove('loading');
-        if(err) return console.error(err.stack || err);
-        console.info('Application closed "'+execPath+'".');
-      });
+    if(!item) return;
+
+    if('items' in item) {
+      return Pitaya.renderLauncherView(itemPath);
     }
 
+    if(item.exec) {
+
+      console.info('Launching application "'+item.exec+'"...');
+      appItemEl.classList.add('loading');
+
+      Pitaya._runApp(item.exec)
+        .then(function() {
+          appItemEl.classList.remove('loading');
+          console.info('Application closed "'+item.exec+'".');
+        })
+        .catch(function(err) {
+          Pitaya._onError(err);
+          appItemEl.classList.remove('loading');
+        })
+      ;
+
+    }
+
+  };
+
+  /**
+   * GoBack button click handler
+   * @private
+   */
+  Pitaya._onGoBackClick = function(evt) {
+
+    var goBackEl = evt.srcElement.matches( '.goback') ? evt.srcElement :
+      Pitaya.DOM.getClosestAncestor(evt.srcElement, '.goback')
+    ;
+
+    if(!goBackEl) return;
+
+    var currentItemPath = goBackEl.dataset.itemPath;
+    var parentItemPath = Pitaya._normalizeItemPath(currentItemPath);
+
+    parentItemPath.pop();
+
+    return Pitaya.renderLauncherView(parentItemPath);
+
+  };
+
+  Pitaya._normalizeItemPath = function(itemPath) {
+
+    if( Array.isArray(itemPath) ) return itemPath;
+
+    if((typeof itemPath === 'string' && itemPath.length === 0) || !itemPath) return [];
+
+    return itemPath.split('.').reduce(function(arr, index) {
+      if(index !== '') {
+        arr.push(+index);
+      }
+      return arr;
+    }, []);
+
+  };
+
+  Pitaya._getItemByPath = function(itemPath, rootItem) {
+
+    rootItem = rootItem || Pitaya._profile;
+    itemPath = Pitaya._normalizeItemPath(itemPath);
+
+    var index = itemPath.slice(0,1)[0];
+
+    if(index === undefined) {
+      return rootItem;
+    }
+
+    if(!('items' in rootItem)) {
+      return undefined;
+    }
+
+    var subItem = rootItem.items[index];
+
+    if(itemPath.length === 0) {
+      return subItem;
+    }
+
+    return Pitaya._getItemByPath(itemPath, subItem);
+
+  };
+
+  Pitaya._runApp = function(execPath) {
+    return new Promise(function(resolve, reject) {
+      cp.exec(execPath, function(err) {
+        if(err) return reject(err);
+        return resolve();
+      });
+    });
   };
 
   /**
@@ -123,4 +229,9 @@
     });
   };
 
+
+  Pitaya._onError = function(err) {
+    console.error(err.stack ? err.stack : err);
+  };
+
 }(window.Pitaya = window.Pitaya || {}, window));