diff options
Diffstat (limited to 'helix-term')
| -rw-r--r-- | helix-term/src/ui/editor.rs | 67 |
1 files changed, 44 insertions, 23 deletions
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs index 138456ca..dab654ad 100644 --- a/helix-term/src/ui/editor.rs +++ b/helix-term/src/ui/editor.rs @@ -8,7 +8,7 @@ use crate::{ use helix_core::{ coords_at_pos, - graphemes::ensure_grapheme_boundary_next, + graphemes::{ensure_grapheme_boundary_next, next_grapheme_boundary, prev_grapheme_boundary}, syntax::{self, HighlightEvent}, LineEnding, Position, Range, }; @@ -165,21 +165,18 @@ impl EditorView { } .unwrap_or(base_cursor_scope); - let primary_selection_scope = theme - .find_scope_index("ui.selection.primary") - .unwrap_or(selection_scope); - let highlights: Box<dyn Iterator<Item = HighlightEvent>> = if is_focused { - // inject selections as highlight scopes - let mut spans: Vec<(usize, std::ops::Range<usize>)> = Vec::new(); - // TODO: primary + insert mode patching: // (ui.cursor.primary).patch(mode).unwrap_or(cursor) - let primary_cursor_scope = theme .find_scope_index("ui.cursor.primary") .unwrap_or(cursor_scope); + let primary_selection_scope = theme + .find_scope_index("ui.selection.primary") + .unwrap_or(selection_scope); + // inject selections as highlight scopes + let mut spans: Vec<(usize, std::ops::Range<usize>)> = Vec::new(); for (i, range) in selections.iter().enumerate() { let (cursor_scope, selection_scope) = if i == primary_idx { (primary_cursor_scope, primary_selection_scope) @@ -187,19 +184,23 @@ impl EditorView { (cursor_scope, selection_scope) }; - if range.head == range.anchor { + // Special-case: cursor at end of the rope. + if range.head == range.anchor && range.head == text.len_chars() { spans.push((cursor_scope, range.head..range.head + 1)); continue; } - let reverse = range.head < range.anchor; - - if reverse { - spans.push((cursor_scope, range.head..range.head + 1)); - spans.push((selection_scope, range.head + 1..range.anchor + 1)); + let range = range.min_width_1(text); + if range.head > range.anchor { + // Standard case. + let cursor_start = prev_grapheme_boundary(text, range.head); + spans.push((selection_scope, range.anchor..cursor_start)); + spans.push((cursor_scope, cursor_start..range.head)); } else { - spans.push((selection_scope, range.anchor..range.head)); - spans.push((cursor_scope, range.head..range.head + 1)); + // Reverse case. + let cursor_end = next_grapheme_boundary(text, range.head); + spans.push((cursor_scope, range.head..cursor_end)); + spans.push((selection_scope, cursor_end..range.anchor)); } } @@ -232,7 +233,10 @@ impl EditorView { spans.pop(); } HighlightEvent::Source { start, end } => { - let text = text.slice(start..end); + // `unwrap_or_else` part is for off-the-end indices of + // the rope, to allow cursor highlighting at the end + // of the rope. + let text = text.get_slice(start..end).unwrap_or_else(|| " ".into()); use helix_core::graphemes::{grapheme_width, RopeGraphemes}; @@ -301,7 +305,11 @@ impl EditorView { let info: Style = theme.get("info"); let hint: Style = theme.get("hint"); - for (i, line) in (view.first_line..last_line).enumerate() { + // Whether to draw the line number for the last line of the + // document or not. We only draw it if it's not an empty line. + let draw_last = text.line_to_byte(last_line) < text.len_bytes(); + + for (i, line) in (view.first_line..=last_line).enumerate() { use helix_core::diagnostic::Severity; if let Some(diagnostic) = doc.diagnostics().iter().find(|d| d.line == line) { surface.set_stringn( @@ -318,11 +326,17 @@ impl EditorView { ); } - // line numbers having selections are rendered differently + // Line numbers having selections are rendered + // differently, further below. + let line_number_text = if line == last_line && !draw_last { + " ~".into() + } else { + format!("{:>5}", line + 1) + }; surface.set_stringn( viewport.x + 1 - OFFSET, viewport.y + i as u16, - format!("{:>5}", line + 1), + line_number_text, 5, linenr, ); @@ -336,7 +350,7 @@ impl EditorView { if is_focused { let screen = { let start = text.line_to_char(view.first_line); - let end = text.line_to_char(last_line + 1); + let end = text.line_to_char(last_line + 1) + 1; // +1 for cursor at end of text. Range::new(start, end) }; @@ -345,10 +359,17 @@ impl EditorView { for selection in selection.iter().filter(|range| range.overlaps(&screen)) { let head = view.screen_coords_at_pos(doc, text, selection.head); if let Some(head) = head { + // Draw line number for selected lines. + let line_number = view.first_line + head.row; + let line_number_text = if line_number == last_line && !draw_last { + " ~".into() + } else { + format!("{:>5}", line_number + 1) + }; surface.set_stringn( viewport.x + 1 - OFFSET, viewport.y + head.row as u16, - format!("{:>5}", view.first_line + head.row + 1), + line_number_text, 5, linenr_select, ); |