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Handle message marks on non-64-bit platforms (#329)

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Ulyssa 2024-08-18 01:31:42 -07:00 • committed by GitHub
parent 3003f0a528
commit 4fc05c7b40
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1 changed files with 23 additions and 11 deletions
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34
src/message/mod.rs
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@ -4,7 +4,7 @@ use std::cmp::{Ord, Ordering, PartialOrd};
use std::collections::hash_map::DefaultHasher; use std::collections::hash_map::DefaultHasher;
use std::collections::hash_set; use std::collections::hash_set;
use std::collections::BTreeMap; use std::collections::BTreeMap;
use std::convert::TryFrom; use std::convert::{TryFrom, TryInto};
use std::fmt::{self, Display}; use std::fmt::{self, Display};
use std::hash::{Hash, Hasher}; use std::hash::{Hash, Hasher};
use std::ops::{Deref, DerefMut}; use std::ops::{Deref, DerefMut};
@ -130,6 +130,24 @@ const MIN_MSG_LEN: usize = 30;
const TIME_GUTTER_EMPTY: &str = " "; const TIME_GUTTER_EMPTY: &str = " ";
const TIME_GUTTER_EMPTY_SPAN: Span<'static> = span_static(TIME_GUTTER_EMPTY); const TIME_GUTTER_EMPTY_SPAN: Span<'static> = span_static(TIME_GUTTER_EMPTY);
const USIZE_TOO_SMALL: bool = usize::BITS < u64::BITS;
/// Convert the [u64] hash to [usize] as needed.
fn hash_finish_usize(hasher: DefaultHasher) -> Option<usize> {
if USIZE_TOO_SMALL {
(hasher.finish() % usize::MAX as u64).try_into().ok()
} else {
hasher.finish().try_into().ok()
}
}
/// Hash an [EventId] into a [usize].
fn hash_event_id(event_id: &EventId) -> Option<usize> {
let mut hasher = DefaultHasher::new();
event_id.hash(&mut hasher);
hash_finish_usize(hasher)
}
/// Before the image is loaded, already display a placeholder frame of the image size. /// Before the image is loaded, already display a placeholder frame of the image size.
fn placeholder_frame( fn placeholder_frame(
text: Option<&str>, text: Option<&str>,
@ -313,17 +331,14 @@ impl MessageCursor {
} }
pub fn from_cursor(cursor: &Cursor, thread: &Messages) -> Option<Self> { pub fn from_cursor(cursor: &Cursor, thread: &Messages) -> Option<Self> {
let ev_hash = u64::try_from(cursor.get_x()).ok()?; let ev_hash = cursor.get_x();
let ev_term = OwnedEventId::try_from("$").ok()?; let ev_term = OwnedEventId::try_from("$").ok()?;
let ts_start = MessageTimeStamp::try_from(cursor.get_y()).ok()?; let ts_start = MessageTimeStamp::try_from(cursor.get_y()).ok()?;
let start = (ts_start, ev_term); let start = (ts_start, ev_term);
for ((ts, event_id), _) in thread.range(&start..) { for ((ts, event_id), _) in thread.range(&start..) {
let mut hasher = DefaultHasher::new(); if hash_event_id(event_id)? == ev_hash {
event_id.hash(&mut hasher);
if hasher.finish() == ev_hash {
return Self::from((*ts, event_id.clone())).into(); return Self::from((*ts, event_id.clone())).into();
} }
@ -342,11 +357,8 @@ impl MessageCursor {
pub fn to_cursor(&self, thread: &Messages) -> Option<Cursor> { pub fn to_cursor(&self, thread: &Messages) -> Option<Cursor> {
let (ts, event_id) = self.to_key(thread)?; let (ts, event_id) = self.to_key(thread)?;
let y: usize = usize::try_from(ts).ok()?; let y = usize::try_from(ts).ok()?;
let x = hash_event_id(event_id)?;
let mut hasher = DefaultHasher::new();
event_id.hash(&mut hasher);
let x = usize::try_from(hasher.finish()).ok()?;
Cursor::new(y, x).into() Cursor::new(y, x).into()
} }