Is there a trick for word wrapping with non-monospaced fonts?

I'm having a bit of trouble right now trying to implement word wr开发者_运维技巧apping for non-monospaced fonts (The font can be different). I've tried searching for this everywhere but couldn't find a solution. Any tips?

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How about this?

• store length in pixels of every word
• store pixel-offset of every word
• when text gets inserted in a line, update the offsets and, if necessary, break the line