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.
When the cursor is moved over the selection bar, without holding any
mouse buttons down, the cursor would be repeatably set between the
normal cursor, set by DefWindowProc for the WM_SETCURSOR message, and
the reversed cursor, set by ME_MouseMove.
I created a function to set the default paragraph format to ensure
consistency when this is done. This initial paragraph format is also
now more consistent with native richedit controls. The dwMask value
always appears to have the same value when retrieved from the native
richedit controls, so all the mask values are now initialized when the
PARAFORMAT2 structure is created.
The PARAFORMAT structure has a bit in wEffects to indicate whether the
paragraph is a table or not, so this should be used instead of a private
bTable value, since this structure can be retrieved with EM_GETPARAFORMAT.
The cursor should only be shown when there is no selection, since this
is how it is done in Windows. This patch avoids showing the cursor when
there is a selection, and destroys the cursor when a selection is made.
The error was a memory access of a freed object. In ME_AddUndoItem I
checked the top of the undo stack to end a coalescing undo transaction,
assuming that this should be either a valid undo item, or NULL, instead
it was already freed.
The caret's x position is stored in ME_TextEditor.nUDArrowX so that when
the caret is moved up or down, it will stay along the same horizontal
position, or at the end of a line. Unfortunately, the value stored in
nUDArrowX was being unconditionally discarded in ME_ArrowKey, preventing
it from serving its purpose.
Before the end of the text was selected when clicking below the end of
the text, rather than using the x position to find the appropriate
character on the last row that is closest to the pixel position.
When the caret is at the start of a run, it uses the font of the
previous run for inserting characters. The caret size previously was
the wrong height for the characters being inserted when the caret was at
the start of a line, but not the start of a paragraph so this patch
fixes this bug.
The check to see if the dwOutputBuffer is full was performed incorrectly
in RTFPutUnicodeString, however, this mistake was actually harmless
since it would just cause an extra loop that does nothing, then the
check would work properly with the variable fit equal to 0.
Checks were added for hexadecimal values that did not have valid
characters, and for EOF received before the final closing brace of the
rich text stream. The error values were tested on richedit versions 1,
2, 3 & 4.1, and they were all the same for these cases.
The function ME_GetInsertStyle already checks for the case where there
is a selection, so there is no need to duplicate this code for
ME_GetSelectionInsertStyle.
Consecutively typed characters are grouped together to be undone
together. The grouping of typed characters can be stopped by certain
events that are mentioned in MSDN's remarks on the EM_STOPGROUPTYPING
message, which is also implemented by this patch.
Previously bold needed to be set by setting CFM_WEIGHT in the
CHARFORMAT2 structure, and then setting the appropriate wWeight value.
This approach isn't even supported in version 3.0 of the richedit
control. Now bold can be set/unset properly for Windows or Wine using
CFE_BOLD in dwEffects and with CFM_BOLD set in the dwMask flag.
Opening a text file with a NULL terminated character in it was causing
an assertion error after a run was being split due to word wrap.
Windows allows NULL terminated characters to be in the text.
Using Ctrl-RightArrow to move to the start of the next word did not
previously work when at the start of a word. This means that
Ctrl-RightArrow would not work twice in a row since it should move to
the start of the next word.
The call to GetClientRect returns 0 values for the returned RECT when
called in WM_NCCREATE in on Windows, which ended up causing an assertion
error when Wine's riched20.dll replaces the native version. Moving the
call to WM_CREATE fixes this problem (probably because NCCALCSIZE is
called in between).
The function ME_FindRunInRow uses two parameters to return values by
reference, and treated these parameters as if they were optional except
for the start of the function which set *pbCaretAtEnd without checking
to see if was a NULL pointer.
Default richedit font (System) in Windows causes richedit to report
CFM_BOLD as always set. Switch to Courier New in order to see that
richedit really sets the CFM_BOLD attribute in the correct selection.
Dylan Smith