diff options
| -rw-r--r-- | helix-term/src/ui/picker.rs | 1 | ||||
| -rw-r--r-- | helix-tui/src/buffer.rs | 78 |
2 files changed, 57 insertions, 22 deletions
diff --git a/helix-term/src/ui/picker.rs b/helix-term/src/ui/picker.rs index 7e257c0b..7fc6af0f 100644 --- a/helix-term/src/ui/picker.rs +++ b/helix-term/src/ui/picker.rs @@ -483,6 +483,7 @@ impl<T: 'static> Component for Picker<T> { text_style }, true, + true, ); } } diff --git a/helix-tui/src/buffer.rs b/helix-tui/src/buffer.rs index 377e3e39..f480bc2f 100644 --- a/helix-tui/src/buffer.rs +++ b/helix-tui/src/buffer.rs @@ -266,12 +266,14 @@ impl Buffer { where S: AsRef<str>, { - self.set_string_truncated(x, y, string, width, style, false) + self.set_string_truncated(x, y, string, width, style, false, false) } /// Print at most the first `width` characters of a string if enough space is available - /// until the end of the line. If `markend` is true appends a `…` at the end of - /// truncated lines. + /// until the end of the line. If `ellipsis` is true appends a `…` at the end of + /// truncated lines. If `truncate_start` is `true`, truncate the beginning of the string + /// instead of the end. + #[allow(clippy::too_many_arguments)] pub fn set_string_truncated<S>( &mut self, x: u16, @@ -280,6 +282,7 @@ impl Buffer { width: usize, style: Style, ellipsis: bool, + truncate_start: bool, ) -> (u16, u16) where S: AsRef<str>, @@ -289,28 +292,59 @@ impl Buffer { let width = if ellipsis { width - 1 } else { width }; let graphemes = UnicodeSegmentation::graphemes(string.as_ref(), true); let max_offset = min(self.area.right() as usize, width.saturating_add(x as usize)); - for s in graphemes { - let width = s.width(); - if width == 0 { - continue; + if !truncate_start { + for s in graphemes { + let width = s.width(); + if width == 0 { + continue; + } + // `x_offset + width > max_offset` could be integer overflow on 32-bit machines if we + // change dimenstions to usize or u32 and someone resizes the terminal to 1x2^32. + if width > max_offset.saturating_sub(x_offset) { + break; + } + + self.content[index].set_symbol(s); + self.content[index].set_style(style); + // Reset following cells if multi-width (they would be hidden by the grapheme), + for i in index + 1..index + width { + self.content[i].reset(); + } + index += width; + x_offset += width; } - // `x_offset + width > max_offset` could be integer overflow on 32-bit machines if we - // change dimenstions to usize or u32 and someone resizes the terminal to 1x2^32. - if width > max_offset.saturating_sub(x_offset) { - break; + if ellipsis && x_offset - (x as usize) < string.as_ref().width() { + self.content[index].set_symbol("…"); } - - self.content[index].set_symbol(s); - self.content[index].set_style(style); - // Reset following cells if multi-width (they would be hidden by the grapheme), - for i in index + 1..index + width { - self.content[i].reset(); + } else { + let mut start_index = self.index_of(x, y); + let mut index = self.index_of(max_offset as u16, y); + + let total_width = string.as_ref().width(); + let truncated = total_width > width; + if ellipsis && truncated { + self.content[start_index].set_symbol("…"); + start_index += 1; + } + if !truncated { + index -= width - total_width; + } + for s in graphemes.rev() { + let width = s.width(); + if width == 0 { + continue; + } + let start = index - width; + if start < start_index { + break; + } + self.content[start].set_symbol(s); + self.content[start].set_style(style); + for i in start + 1..index { + self.content[i].reset(); + } + index -= width; } - index += width; - x_offset += width; - } - if ellipsis && x_offset - (x as usize) < string.as_ref().width() { - self.content[index].set_symbol("…"); } (x_offset as u16, y) } |