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truncate incoming messages by lines (#3480)

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* truncate incoming messages by lines,
because many linebreaks seem to cause the chat open delay on deltachat-ios

* run cargo fmt

* remove DC_DESIRED_TEXT_LINES_THRESHOLD
and use Strings instead of Cow<str>

* remove usage of clippy::indexing_slicing in truncate_by_lines (#3596)

* adjust comments

* Fix truncate_by_lines tests

* Reword indexing/slicing error

* Remove unnecessary conditional

* Fix a typo in the comment

Co-authored-by: link2xt <link2xt@testrun.org>
This commit is contained in:
Simon Laux
2022-09-17 16:15:33 +02:00
committed by GitHub
parent 569628a202
commit 62afd3d4c3
4 changed files with 151 additions and 12 deletions
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7
src/constants.rs
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@@ -167,6 +167,11 @@ pub const DC_MSG_ID_LAST_SPECIAL: u32 = 9;
/// String that indicates that something is left out or truncated.
pub const DC_ELLIPSIS: &str = "[...]";
// how many lines desktop can display when fullscreen (fullscreen at zoomlevel 1x)
// (taken from "subjective" testing what looks ok)
pub const DC_DESIRED_TEXT_LINES: usize = 38;
// how many chars desktop can display per line (from "subjective" testing)
pub const DC_DESIRED_TEXT_LINE_LEN: usize = 100;
/// Message length limit.
///
@@ -176,7 +181,7 @@ pub const DC_ELLIPSIS: &str = "[...]";
///
/// Note that for simplicity maximum length is defined as the number of Unicode Scalar Values (Rust
/// `char`s), not Unicode Grapheme Clusters.
pub const DC_DESIRED_TEXT_LEN: usize = 5000;
pub const DC_DESIRED_TEXT_LEN: usize = DC_DESIRED_TEXT_LINE_LEN * DC_DESIRED_TEXT_LINES;
// Flags for empty server job