sacc

sacc(omys), simple console gopher client (mirror)
git clone https://git.parazyd.org/sacc
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commit 21f414d9dc19a291e207562994c35bb9e3df3bc1
parent ed833e386ffe895fe2c675b549e7353fe0d3308f
Author: Quentin Rameau <quinq@fifth.space>
Date:   Thu, 27 Jul 2017 13:20:34 +0200

Fix jumptoline with random line number in ti UI

Thanks to Hiltjo for spotting it!

Diffstat:
Mui_ti.c | 59++++++++++++++++++++++++++++++-----------------------------
1 file changed, 30 insertions(+), 29 deletions(-)

diff --git a/ui_ti.c b/ui_ti.c @@ -235,39 +235,40 @@ movecurline(Item *item, int l) } static void -jumptoline(Item *entry, ssize_t offset) +jumptoline(Item *entry, ssize_t line, int absolute) { Dir *dir = entry->dat; - size_t nitems; - int plines = lines-2; + size_t lastitem; + int lastpagetop, plines = lines-2; if (!dir) return; + lastitem = dir->nitems-1; - nitems = dir->nitems; + if (line < 0) + line = 0; + if (line > lastitem) + line = lastitem; - if (offset <= 0) { - if (!dir->curline) - return; - dir->printoff = 0; - dir->curline = 0; - } else if (offset + plines < nitems) { - dir->printoff = offset; - dir->curline = offset; - } else if (dir->curline == nitems-1) { + if (dir->curline == line) return; - } else if (nitems < plines) { - dir->curline = nitems-1; - } else if (offset == nitems) { - dir->printoff = nitems-1 - plines; - dir->curline = nitems-1; - } else { - offset = nitems-1 - plines; - if (dir->printoff == offset) - dir->curline = nitems-1; - else if (dir->curline < offset) - dir->curline = offset; - dir->printoff = offset; + + if (lastitem <= plines) { /* all items fit on one page */ + dir->curline = line; + } else if (line == 0) { /* jump to top */ + if (absolute || dir->curline > plines || dir->printoff == 0) + dir->curline = 0; + dir->printoff = 0; + } else if (line + plines < lastitem) { /* jump before last page */ + dir->curline = line; + dir->printoff = line; + } else { /* jump within the last page */ + lastpagetop = lastitem - plines; + if (dir->printoff == lastpagetop || absolute) + dir->curline = line; + else if (dir->curline < lastpagetop) + dir->curline = lastpagetop; + dir->printoff = lastpagetop; } display(entry); @@ -336,11 +337,11 @@ selectitem(Item *entry) continue; case _key_pgdown: pgdown: - jumptoline(entry, dir->printoff + plines); + jumptoline(entry, dir->printoff + plines, 0); continue; case _key_end: end: - jumptoline(entry, dir->nitems); + jumptoline(entry, dir->nitems, 0); continue; case _key_lnup: lnup: @@ -348,11 +349,11 @@ selectitem(Item *entry) continue; case _key_pgup: pgup: - jumptoline(entry, dir->printoff - plines); + jumptoline(entry, dir->printoff - plines, 0); continue; case _key_home: home: - jumptoline(entry, 0); + jumptoline(entry, 0, 0); continue; case _key_quit: quit: