refactor .useFont()

examples/font.js

@@ -27,9 +27,9 @@ var canvas = new Canvas(320, 320)
 var ctx = canvas.getContext('2d')
 
 // Tell the ctx to use the font.
-ctx.useFont(pfennigFont);
+ctx.addFont(pfennigFont);
 
-ctx.font = 'normal normal 50px "Times", serif';
+ctx.font = 'normal normal 50px Helvetica';
 
 ctx.fillText('Quo Vaids?', 0, 70);
 

lib/context2d.js

@@ -166,7 +166,7 @@ Context2d.prototype.setTransform = function(){
 
 Context2d.prototype.__defineSetter__('fillStyle', function(val){
   if (!val) return;
-  if ('CanvasGradient' == val.constructor.name 
+  if ('CanvasGradient' == val.constructor.name
     || 'CanvasPattern' == val.constructor.name) {
     this.lastFillStyle = val;
     this._setFillPattern(val);
@@ -194,7 +194,7 @@ Context2d.prototype.__defineGetter__('fillStyle', function(){
 
 Context2d.prototype.__defineSetter__('strokeStyle', function(val){
   if (!val) return;
-  if ('CanvasGradient' == val.constructor.name 
+  if ('CanvasGradient' == val.constructor.name
     || 'CanvasPattern' == val.constructor.name) {
     this.lastStrokeStyle = val;
     this._setStrokePattern(val);
@@ -214,15 +214,17 @@ Context2d.prototype.__defineGetter__('strokeStyle', function(){
   return this.lastStrokeStyle || this.strokeColor;
 });
 
+/**
+ * Register `font` for usage.
+ *
+ * @param {Font} font
+ * @api public
+ */
 
-Context2d.prototype.useFont = function(font) {
-  if (!this._fonts) this._fonts = {};
-  var fonts = this._fonts;
-
-  if (fonts[font.name])
-    return;
-
-  fonts[font.name] = font;
+Context2d.prototype.addFont = function(font) {
+  this._fonts = this._fonts || {};
+  if (this._fonts[font.name]) return;
+  this._fonts[font.name] = font;
 };
 
 /**