blackbeard420/notcurses
1
0
Fork 0
mirror of https://github.com/dankamongmen/notcurses synced 2025-03-09 09:09:03 -04:00
Code Issues Projects Releases Wiki Activity

[windows] correct visual area width determination #2105

Browse Source
This commit is contained in:
nick black 2021-11-21 19:22:35 -05:00
parent 0603f18bd6
commit 15e768b4d1
No known key found for this signature in database
GPG Key ID: 5F43400C21CBFACC
1 changed files with 28 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/lib/notcurses.c
View File

@ -298,8 +298,35 @@ int update_term_dimensions(unsigned* rows, unsigned* cols, tinfo* tcache, int ma
}
#else
CONSOLE_SCREEN_BUFFER_INFO csbi;
// There is the buffer itself, which is similar in function to the scrollback
// buffer in a Linux terminal, and there is the display window, which is the
// visible view of that buffer. The addressable area (from a VT point of
// view) spans the width of the buffer, but the height of the display window.
//
// +--------------------------+ ^
// | | |
// | | |
// +-----+--------------+-----+ ^ w | b
// |XXXXX|XXXXXXXXXXXXXX|XXXXX| | i | u
// |XXXXX|XXXXXXXXXXXXXX|XXXXX| | n | f
// |XXXXX|XXXXXXXXXXXXXX|XXXXX| | d | f
// |XXXXX|XXXXXXXXXXXXXX|XXXXX| | o | e
// +-----+--------------+-----+ v w | r
// | | |
// | | |
// +--------------------------+ v
//
// <--- window --->
//
//<--------- buffer --------->
//
// Because the buffer extends past the bottom of the display window, a user
// can potentially scroll down beyond what would normally be thought of as the
// end of the buffer. Because the buffer can be wider than the display
// window, the user can scroll horizontally to view parts of the addressable
// area that aren't currently visible.
if(GetConsoleScreenBufferInfo(tcache->outhandle, &csbi)){
*cols = csbi.srWindow.Right - csbi.srWindow.Left + 1;
*cols = csbi.dwSize.X;
*rows = csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
}else{
*rows = tcache->default_rows;