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keep the cursor at the end instead of beginning

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Andrew Kelley 2024-05-22 22:09:22 -07:00
parent 66c3b6ac65
commit 582acdf721
1 changed files with 16 additions and 12 deletions
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28
lib/std/Progress.zig
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@ -60,7 +60,7 @@ pub const Options = struct {
/// Must be at least 200 bytes.
draw_buffer: []u8,
/// How many nanoseconds between writing updates to the terminal.
refresh_rate_ns: u64 = 50 * std.time.ns_per_ms,
refresh_rate_ns: u64 = 60 * std.time.ns_per_ms,
/// How many nanoseconds to keep the output hidden
initial_delay_ns: u64 = 500 * std.time.ns_per_ms,
/// If provided, causes the progress item to have a denominator.
@ -435,8 +435,8 @@ fn computeRedraw() []u8 {
}
}
// The strategy is: keep the cursor at the beginning, and then with every redraw:
// erase to end of screen, write, move cursor to beginning of line, move cursor up N lines
// The strategy is: keep the cursor at the end, and then with every redraw:
// move cursor to beginning of line, move cursor up N lines, erase to end of screen, write
var i: usize = 0;
const buf = global_progress.draw_buffer;
@ -444,22 +444,26 @@ fn computeRedraw() []u8 {
buf[i..][0..start_sync.len].* = start_sync.*;
i += start_sync.len;
buf[0..clear.len].* = clear.*;
i = clear.len;
const root_node_index: Node.Index = @enumFromInt(0);
i = computeNode(buf, i, serialized_node_storage, serialized_node_parents, children, root_node_index);
if (buf[i - 1] == '\n') {
buf[i - 1] = '\r';
const prev_nl_n = global_progress.newline_count - 1;
const prev_nl_n = global_progress.newline_count;
if (global_progress.newline_count > 0) {
global_progress.newline_count = 0;
buf[i] = '\r';
i += 1;
for (0..prev_nl_n) |_| {
buf[i..][0..up_one_line.len].* = up_one_line.*;
i += up_one_line.len;
}
}
buf[i..][0..clear.len].* = clear.*;
i += clear.len;
const root_node_index: Node.Index = @enumFromInt(0);
i = computeNode(buf, i, serialized_node_storage, serialized_node_parents, children, root_node_index);
// Truncate trailing newline.
//if (buf[i - 1] == '\n') i -= 1;
buf[i..][0..finish_sync.len].* = finish_sync.*;
i += finish_sync.len;