On 2021-04-17 at 23:19 +0200, Samuel Thibault <[email protected]> wrote: > Aura Kelloniemi, le ven. 16 avril 2021 09:22:32 +0300, a ecrit: > > On 2021-04-16 at 01:04 +0200, Samuel Thibault > > <[email protected]> wrote: > > > Such languages can then use brlapi__write with setting the charset, the > > > textSize, regionBegin set to 0, and regionSize with that flag or special > > > value. Is there something missing here? > > > > No, there isn't. This would be a working solution.
> This has now landed! According to documentation, setting regionSize to a negative value blanks the rest of the display. If the masks are shorter than the number of cells until the end of the display, but text is longer than regionSize, what happens? I wonder whether it would be semantically clearer to blank only up to (regionSize * -1) if regionSize < 0, because we already decided that it is most likely a programming bug, if the masks do not match the text length (in code points). This is partly because the caller of brlapi__write uses masks to add/remove dots from particular characters, and to do that they need to know about the exact indices of those characters. Thinking about regional writes brought oen more question to my mind: If an application uses regional writes, and another application "steals" the TTY from the original client, and later restores it, will the display contents be restored to original text the first client was showing? If not, regional writes won't work as the parts of the display that are not refreshed will contain invalid information. -- Aura _______________________________________________ This message was sent via the BRLTTY mailing list. To post a message, send an e-mail to: [email protected] For general information, go to: http://brltty.app/mailman/listinfo/brltty
