Comment 48 for bug 677551
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#48 |
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0e1f616
(Get the code!)
OK, I still don't know why we create different textruns after pasting and pressing Enter, but what bz saw in comment 45 is not surprising at all.
ClearTextRun sets mTextRun on the frames to null. And we invalidate all of the lines following the entered newline, which means that the textframes inside them are all reflown, at which time a new textrun is created because, well, mTextRun is null!