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Rich text in Pharo

Text object models rich text. That is to say text that can be stylised.

Here is short example showing how it works basically:

text := 'Hello World!' asText.
text
	addAttribute: TextEmphasis bold from: 1 to: 5;
	addAttribute: (TextColor color: Color red) from: 7 to: 11;
	addAttribute: (TextColor color: Color green) from: 12 to: 12.

If you inspect text, you will see that Hello is bold, World is red, ! is green.