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slack: page-down on channel screen

This commit is contained in:
Kartik K. Agaram 2021-08-13 15:24:30 -07:00
parent cd6a049f62
commit ae01fd8c70
1 changed files with 21 additions and 11 deletions
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browse-slack/environment.mu
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@ -640,21 +640,31 @@ fn all-items-page-down _current-tab: (addr tab), users: (addr array user), chann
copy-to *current-tab-item-index-addr, new-item-index copy-to *current-tab-item-index-addr, new-item-index
} }
fn channel-page-down _current-tab: (addr tab), users: (addr array user), channels: (addr array channel), _items: (addr item-list) { fn channel-page-down _current-tab: (addr tab), users: (addr array user), _channels: (addr array channel), _items: (addr item-list) {
var current-tab/edi: (addr tab) <- copy _current-tab var current-tab/edi: (addr tab) <- copy _current-tab
var items/esi: (addr item-list) <- copy _items var current-channel-index-addr/eax: (addr int) <- get current-tab, root-index
var current-channel-index/eax: int <- copy *current-channel-index-addr
var channels/esi: (addr array channel) <- copy _channels
var current-channel-offset/eax: (offset channel) <- compute-offset channels, current-channel-index
var current-channel/esi: (addr channel) <- index channels, current-channel-offset
var current-channel-posts-ah/eax: (addr handle array int) <- get current-channel, posts
var _current-channel-posts/eax: (addr array int) <- lookup *current-channel-posts-ah
var current-channel-posts/esi: (addr array int) <- copy _current-channel-posts
var items/eax: (addr item-list) <- copy _items
var items-data-ah/eax: (addr handle array item) <- get items, data var items-data-ah/eax: (addr handle array item) <- get items, data
var _items-data/eax: (addr array item) <- lookup *items-data-ah var _items-data/eax: (addr array item) <- lookup *items-data-ah
var items-data/ebx: (addr array item) <- copy _items-data var items-data/ebx: (addr array item) <- copy _items-data
var current-tab-item-index-addr/edi: (addr int) <- get current-tab, item-index var current-tab-item-index-addr/edi: (addr int) <- get current-tab, item-index
var new-item-index/ecx: int <- copy *current-tab-item-index-addr var new-tab-item-index/ecx: int <- copy *current-tab-item-index-addr
var y/edx: int <- copy 2 var y/edx: int <- copy 2
{ {
compare new-item-index, 0 compare new-tab-item-index, 0
break-if-< break-if-<
compare y, 0x28/screen-height-minus-menu compare y, 0x28/screen-height-minus-menu
break-if->= break-if->=
var offset/eax: (offset item) <- compute-offset items-data, new-item-index var current-item-index-addr/eax: (addr int) <- index current-channel-posts, new-tab-item-index
var current-item-index/eax: int <- copy *current-item-index-addr
var offset/eax: (offset item) <- compute-offset items-data, current-item-index
var item/eax: (addr item) <- index items-data, offset var item/eax: (addr item) <- index items-data, offset
var item-text-ah/eax: (addr handle array byte) <- get item, text var item-text-ah/eax: (addr handle array byte) <- get item, text
var item-text/eax: (addr array byte) <- lookup *item-text-ah var item-text/eax: (addr array byte) <- lookup *item-text-ah
@ -662,23 +672,23 @@ fn channel-page-down _current-tab: (addr tab), users: (addr array user), channel
set-cursor-position 0/screen, 0 0 set-cursor-position 0/screen, 0 0
draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, h, 4/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, h, 4/fg 0/bg
y <- add h y <- add h
new-item-index <- decrement new-tab-item-index <- decrement
loop loop
} }
new-item-index <- increment new-tab-item-index <- increment
{ {
# HACK: make sure we make forward progress even if a single post takes up # HACK: make sure we make forward progress even if a single post takes up
# the whole screen. # the whole screen.
# We can't see the rest of that single post at the moment. But at least we # We can't see the rest of that single post at the moment. But at least we
# can go past it. # can go past it.
compare new-item-index, *current-tab-item-index-addr compare new-tab-item-index, *current-tab-item-index-addr
break-if-!= break-if-!=
# Don't make "forward progress" past post 0. # Don't make "forward progress" past post 0.
compare new-item-index, 0 compare new-tab-item-index, 0
break-if-= break-if-=
new-item-index <- decrement new-tab-item-index <- decrement
} }
copy-to *current-tab-item-index-addr, new-item-index copy-to *current-tab-item-index-addr, new-tab-item-index
} }
fn page-up _env: (addr environment), users: (addr array user), channels: (addr array channel), _items: (addr item-list) { fn page-up _env: (addr environment), users: (addr array user), channels: (addr array channel), _items: (addr item-list) {