Brad Beveridge wrote:
> Hi, sorry for all the trouble :) I'm having redraw issues, where
> running this code to append chars is causing strange problems.
> The scenario is this (always using the code below for char output):
> 1) Write a char to a buffer (line1)
> 2) Write a newline (line 2)
> 3) Move the cursor to the bottom of the buffer (line2 empty)
> 4) Write another Char (appears in line2)
> 5) Press Ctrl-L
> 6) Notice that line1 has vanished.
>
> moving the cursor to the new blank line at the bottom of the line is
> critical here. I'm sure that I'm doing something wrong, but I really
> can't figure it out.
> As a side note, it feels very clumsy to have to manually call "changed
> line" functions when calling ml_* funcs - is there some notes I can
> read about why this is?
The screen updating code doesn't want to redraw everything all the time.
Thus you must somehow specify what text got changed/inserted/deleted.
If you don't do that you might indeed see redraw problems that go away
when using CTRL-L.
You are doing low level stuff here, thus you must take care of all these
things yourself.
> Anyhow, here is the code I'm using to put chars in a buffer - I really
> appreciate any thoughts, this feels so close to working, but I've
> spend several hours trying to get it right. Very frustrating :)
>
> Cheers
> Brad
>
> static void vim_append_char (buf_T target_buf, char c)
> {
> static char string[2] = {0};
> buf_T *savebuf = curbuf;
> curbuf = target_buf;
> int start_line = curbuf->b_ml.ml_line_count;
> int lines_changed = 0;
>
> string[0] = c;
> if (string[0] == '\n')
> {
> ml_append (start_line, "", 0, FALSE);
> lines_changed = 0;
> }
> else
> ml_append_string (start_line, string, -1);
> changed_lines (start_line, 0, start_line, lines_changed);
>
> /* restore and return */
> curbuf = savebuf;
> }
Do you save text for undo somewhere? That should be done for every
change that is being made, otherwise undo won't work.
--
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/// Bram Moolenaar -- [EMAIL PROTECTED] -- http://www.Moolenaar.net \\\
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