Hi,
On 2011-10-22 22:45, Thomas Faber wrote:
Windows's version of GetTextExtentExPointW, which is called in that function, returns a value of 1 in this case (Wine's does not, which would appear to be a bug), leading to the "i<len" assertion failure if there is no text in the control.
this description isn't 100% complete (the fix is correct nonetheless). With the help of the corresponding gdi32 tests [1], I can describe it better: The nAvailWidth in a zero-width richedit control will be -2 (as borders are subtracted by the format rect, resulting in an invalid rect, as previously demonstrated), which will be passed as max_extent to GetTextExtentExPointW. Wine's version would return 0 as expected, while Windows's would interpret this as a large unsigned number and return the length of the text (1 in my test case, mIRC). This eventually led to the i<len assertion failing, as i was set to len exactly.
I hope this clears up any doubts. Wine's riched20 now works nicely as a replacement for its counterpart. :)
Best regards and have a nice Sunday. Tom
[1] http://www.winehq.org/pipermail/wine-patches/2011-October/108186.html
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Thomas Faber