For simple tables cells are represented with tabs, and a table row is
ended at the end of the paragraph, so native richedit controls
substitute spaces for \tab and \par rich text format control words.
The values returned by EM_SETPARAFORMAT and EM_GETPARAFORMAT previously
indicated an error, and the included tests shows that Windows behaves as
documented.
After selection a word, line, or paragraph with multi click selection or using
the selection bar, then shift can be held and the arrows can be used to move
one of the ends of the selection.
The problem was that the paragraph format was being retrieved,
slightly modified and then used to set the paragraph format, without
limiting the mask to what was being set. The PFM_OFFSETINDENT mask flag
being valid meant that dxStartIndent specifies a relative offset, thus
dxStartIndent was doubled.
This is a minimal model of what happens in Corman Lisp 3.0 -
subclassed window class that unconditionally calls ShowScrollBar() to
force scrollbar visibility.
Some applications have never heard of ES_DISABLENOSCROLL and attempt
to force scrollbars to be always shown (with ShowScrollBar() or
similar) when otherwise richedit would hide them. If richedit attempts
to wrestle control back, a recursive loop of requests can result if
app overrides WM_SIZE behavior. Apparently native never reads the
scrollbar state, and operates from some sort of internal state, so
that scrollbars can be modified externally without native trying to
wrestle back control. This is confirmed by attached tests. An
exception: EM_SCROLL will restore visibility to a scrollbar that was
forcibly hidden.
EM_AUTOURLDETECT tests are taking too much time, so this patch tests
just one URL and one non-URL for all messages but WM_SETTEXT. Also,
remove one trace that spams the output needlessly.
This also reverts commit 2b52dd845097f16076c0185b02a003f63898dcab:
wordpad: Empty the richedit undo buffer on creation.
The reverted commit I created to fix an issue that only applied to Wine,
but it just masked the issue which was in richedit controls. The
default character format was set in two places while wordpad was
starting up, and caused wordpad to have two undo items at startup.
Trying to set the font size to a value larger than 1638
in points (yHeightCharPtsMost) using EM_SETCHARFORMAT will cause it to be
set to actually set to the maximum.
In version 1.0 of the richedit controls highlighting is done by
inverting the colours. Version 2.0 and up highlight instead draw
the text using system colours for the background and the text.
The uncommon case that this patch handles is enough whitespace being
on the first line of a paragraph to cause it to wrap. In this case the
first non-space character will be wrapped onto the next line.
Juan Lang