lazy loading for modules.

lib/blessed.js

@@ -9,32 +9,122 @@
  * Modules
  */
 
-var program = require('./program')
-  , tput = require('./tput')
-  , widget = require('./widget')
-  , colors = require('./colors');
+function define(names, callback) {
+  if (!Array.isArray(names)) names = [names];
+  names.forEach(function(name) {
+    blessed.__defineGetter__(name, callback);
+  });
+}
+
+function load(name) {
+  load.modules = load.modules || {};
+  if (load.modules[name]) return load.modules[name];
+  return load.modules[name] = require(name);
+}
+
+function unload(names) {
+  if (!Array.isArray(names)) names = [names];
+  names.forEach(function(name) {
+    delete load.modules[name];
+    delete require.cache[require.resolve(name)];
+  });
+}
 
 /**
  * Blessed
  */
 
 function blessed() {
-  return program.apply(null, arguments);
+  return blessed.program.apply(null, arguments);
 }
 
-blessed.program = blessed.Program = program;
-blessed.tput = blessed.Tput = tput;
-blessed.colors = colors;
-blessed.widget = widget;
-
-Object.keys(blessed.widget).forEach(function(name) {
-  blessed[name] = blessed.widget[name];
+define(['program', 'Program'], function() {
+  return load('./program');
 });
 
+define(['tput', 'Tput'], function() {
+  return load('./tput');
+});
+
+define('colors', function() {
+  return load('./colors');
+});
+
+define('widget', function() {
+  return load('./widget');
+});
+
+var widgets = [
+  'Node',
+  'Screen',
+  'Element',
+  'Box',
+  'Text',
+  'Line',
+  'ScrollableBox',
+  'List',
+  'ScrollableText',
+  'Form',
+  'Input',
+  'Textbox',
+  'Textarea',
+  'Button',
+  'ProgressBar',
+  'FileManager',
+
+  'Checkbox',
+  'RadioSet',
+  'RadioButton',
+
+  'Prompt',
+  'Question',
+  'Message',
+  'Info',
+  'Loading',
+  'PickList',
+  'Listbar',
+  'DirManager',
+  'Passbox'
+];
+
+widgets = widgets.concat(widgets.map(function(name) {
+  return name.toLowerCase();
+}));
+
+widgets.forEach(function(name) {
+  define(name, function() {
+    return blessed.widget[name];
+  });
+});
+
+// Maybe just:
+// define(['screen', 'Screen'], function() {
+//   Object.keys(blessed.widget).forEach(function(name) {
+//     blessed.__defineGetter__(name, function() {
+//       return blessed.widget[name];
+//     });
+//   });
+//   return blessed.widget.screen;
+// });
+
+// Or:
+// Object.keys(blessed.widget).forEach(function(name) {
+//   blessed.__defineGetter__(name, function() {
+//     return blessed.widget[name];
+//   });
+// });
+// unload(['./alias', './colors', './events', './program', './tput', './widget']);
+
 blessed.helpers = {
-  sprintf: blessed.tput.sprintf,
-  merge: blessed.tput.merge,
-  tryRead: blessed.tput.tryRead
+  get sprintf() {
+    return blessed.tput.sprintf;
+  },
+  get merge() {
+    return blessed.tput.merge;
+  },
+  get tryRead() {
+    return blessed.tput.tryRead;
+  }
 };
 
 /**