Recalcurate line-height when changing the font-family

Author: hidakatsuya

app/editor/core/tblockshape.js

@@ -655,6 +655,19 @@ thin.core.TblockShape.prototype.setTextLineHeightRatio = function(ratio) {
 };
 
 
+/**
+ * @param {string} family
+ */
+thin.core.TblockShape.prototype.setFontFamily = function (family) {
+  goog.base(this, 'setFontFamily', family);
+
+  var ratio = this.getTextLineHeightRatio();
+  if (!thin.isExactlyEqual(ratio, thin.core.TextStyle.DEFAULT_LINEHEIGHT)) {
+    this.setTextLineHeightRatio(ratio);
+  }
+};
+
+
 /**
  * @param {number} size
  */