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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113const std = @import("std");const vaxis = @import("../main.zig");const ScrollView = vaxis.widgets.ScrollView;const LineNumbers = vaxis.widgets.LineNumbers;
pub const DrawOptions = struct { highlighted_line: u16 = 0, draw_line_numbers: bool = true, indentation: u16 = 0,};
pub const Buffer = vaxis.widgets.TextView.Buffer;
scroll_view: ScrollView = .{ .vertical_scrollbar = null },highlighted_style: vaxis.Style = .{ .bg = .{ .index = 0 } },indentation_cell: vaxis.Cell = .{ .char = .{ .grapheme = "┆", .width = 1, }, .style = .{ .dim = true },},
pub fn input(self: *@This(), key: vaxis.Key) void { self.scroll_view.input(key);}
pub fn draw(self: *@This(), win: vaxis.Window, buffer: Buffer, opts: DrawOptions) void { const pad_left: u16 = if (opts.draw_line_numbers) LineNumbers.numDigits(buffer.rows) +| 1 else 0; self.scroll_view.draw(win, .{ .cols = buffer.cols + pad_left, .rows = buffer.rows, }); if (opts.draw_line_numbers) { var nl: LineNumbers = .{ .highlighted_line = opts.highlighted_line, .num_lines = buffer.rows +| 1, }; nl.draw(win.child(.{ .x_off = 0, .y_off = 0, .width = pad_left, .height = win.height, }), self.scroll_view.scroll.y); } self.drawCode(win.child(.{ .x_off = pad_left }), buffer, opts);}
fn drawCode(self: *@This(), win: vaxis.Window, buffer: Buffer, opts: DrawOptions) void { const Pos = struct { x: usize = 0, y: usize = 0 }; var pos: Pos = .{}; var byte_index: usize = 0; var is_indentation = true; const bounds = self.scroll_view.bounds(win); for (buffer.grapheme.items(.len), buffer.grapheme.items(.offset), 0..) |g_len, g_offset, index| { if (bounds.above(pos.y)) { break; }
const cluster = buffer.content.items[g_offset..][0..g_len]; defer byte_index += cluster.len;
if (std.mem.eql(u8, cluster, "\n")) { if (index == buffer.grapheme.len - 1) { break; } pos.y += 1; pos.x = 0; is_indentation = true; continue; } else if (bounds.below(pos.y)) { continue; }
const highlighted_line = pos.y +| 1 == opts.highlighted_line; var style: vaxis.Style = if (highlighted_line) self.highlighted_style else .{};
if (buffer.style_map.get(byte_index)) |meta| { const tmp = style.bg; style = buffer.style_list.items[meta]; style.bg = tmp; }
const width = win.gwidth(cluster); defer pos.x +|= width;
if (!bounds.colInside(pos.x)) { continue; }
if (opts.indentation > 0 and !std.mem.eql(u8, cluster, " ")) { is_indentation = false; }
if (is_indentation and opts.indentation > 0 and pos.x % opts.indentation == 0) { var cell = self.indentation_cell; cell.style.bg = style.bg; self.scroll_view.writeCell(win, pos.x, pos.y, cell); } else { self.scroll_view.writeCell(win, pos.x, pos.y, .{ .char = .{ .grapheme = cluster, .width = @intCast(width) }, .style = style, }); }
if (highlighted_line) { for (pos.x +| width..bounds.x2) |x| { self.scroll_view.writeCell(win, x, pos.y, .{ .style = style }); } } }}