this repo has no description
Fix a compilation error in TextView
Fixed type conversion between u3 returned by utf8CodepointSequenceLength
and usize.
Added a basic example for this widget.
authored by
Konstantin Mandelbaum
and committed by
Tim Culverhouse
5915f33c
4d60d349
+69
-1
+1
build.zig
+1
build.zig
+66
examples/text_view.zig
+66
examples/text_view.zig
···
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const std = @import("std");
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const log = std.log.scoped(.main);
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const vaxis = @import("vaxis");
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const TextView = vaxis.widgets.TextView;
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const Event = union(enum) {
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key_press: vaxis.Key,
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winsize: vaxis.Winsize,
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};
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer {
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const deinit_status = gpa.deinit();
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if (deinit_status == .leak) {
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log.err("memory leak", .{});
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}
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}
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const alloc = gpa.allocator();
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var buffer: [1024]u8 = undefined;
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var tty = try vaxis.Tty.init(&buffer);
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defer tty.deinit();
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var vx = try vaxis.init(alloc, .{});
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defer vx.deinit(alloc, tty.writer());
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var loop: vaxis.Loop(Event) = .{
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.vaxis = &vx,
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.tty = &tty,
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};
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try loop.init();
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try loop.start();
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defer loop.stop();
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try vx.enterAltScreen(tty.writer());
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try vx.queryTerminal(tty.writer(), 20 * std.time.ns_per_s);
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var text_view = TextView{};
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var text_view_buffer = TextView.Buffer{};
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defer text_view_buffer.deinit(alloc);
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try text_view_buffer.append(alloc, .{ .bytes = "Press Enter to add a line, Up/Down to scroll, 'c' to close." });
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var counter: i32 = 0;
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var lineBuf: [128]u8 = undefined;
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while (true) {
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const event = loop.nextEvent();
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switch (event) {
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.key_press => |key| {
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// Close demo
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if (key.matches('c', .{})) break;
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if (key.matches(vaxis.Key.enter, .{})) {
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counter += 1;
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const new_content = try std.fmt.bufPrint(&lineBuf, "\nLine {d}", .{counter});
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try text_view_buffer.append(alloc, .{ .bytes = new_content });
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}
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text_view.input(key);
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},
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.winsize => |ws| try vx.resize(alloc, tty.writer(), ws),
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}
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const win = vx.window();
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win.clear();
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text_view.draw(win, text_view_buffer);
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try vx.render(tty.writer());
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try tty.writer.flush();
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}
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}
+2
-1
src/widgets/TextView.zig
+2
-1
src/widgets/TextView.zig
···
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while (iter.next()) |result| {
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if (prev_break and !result.is_break) {
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// Start of a new grapheme
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grapheme_start = iter.i - std.unicode.utf8CodepointSequenceLength(result.cp) catch 1;
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const cp_len: usize = std.unicode.utf8CodepointSequenceLength(result.cp) catch 1;
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grapheme_start = iter.i - cp_len;
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}
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if (result.is_break) {