initial

utils/TextHelper.js

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+export class TextHelper {
+  static scaleToFit(textObject, size) {
+    if (!size.width) size.width = Infinity;
+    if (!size.height) size.height = Infinity;
+    if (textObject.style.wordWrap) {
+      wordWrapScaleToFit(textObject, size);
+    } else {
+      nonWordWrapScaleToFit(textObject, size);
+    }
+  }
+}
+
+function wordWrapScaleToFit(textObject, size) {
+  textObject.scale.set(1);
+  if (!textObject.style.defaultWordWrapWidth) {
+    textObject.style.defaultWordWrapWidth = textObject.style.wordWrapWidth;
+  }
+  textObject.style.wordWrapWidth = textObject.style.defaultWordWrapWidth;
+  const scaleStep = 0.99;
+  while (size.width < textObject.width || size.height < textObject.height) {
+    textObject.scale.set(textObject.scale.x * scaleStep, textObject.scale.y * scaleStep);
+    textObject.style.wordWrapWidth = textObject.style.wordWrapWidth / scaleStep;
+  }
+}
+
+function nonWordWrapScaleToFit(textObject, size) {
+  textObject.scale.set(1);
+  const factor = Math.min(1, size.width / textObject.width, size.height / textObject.height);
+  textObject.scale.set(factor);
+}