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scroll: improve animation
+76
-7
+76
-7
src/irc.zig
+76
-7
src/irc.zig
···
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pending: i17 = 0,
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} = .{},
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+
animation_end_ms: u64 = 0,
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+
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message_view: struct {
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mouse: ?vaxis.Mouse = null,
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hovered_message: ?Message = null,
···
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}
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if (key.matches(vaxis.Key.page_up, .{})) {
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self.scroll.pending += self.client.app.last_height / 2;
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+
self.animation_end_ms = @intCast(std.time.milliTimestamp() + 200);
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try self.doScroll(ctx);
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return ctx.consumeAndRedraw();
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}
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if (key.matches(vaxis.Key.page_down, .{})) {
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+
self.animation_end_ms = @intCast(std.time.milliTimestamp() + 200);
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self.scroll.pending -|= self.client.app.last_height / 2;
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try self.doScroll(ctx);
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return ctx.consumeAndRedraw();
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}
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if (key.matches(vaxis.Key.home, .{})) {
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+
self.animation_end_ms = @intCast(std.time.milliTimestamp() + 200);
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self.scroll.pending -= self.scroll.offset;
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self.scroll.msg_offset = null;
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try self.doScroll(ctx);
···
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self.scroll.msg_offset = null;
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}
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}
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-
const animation_tick: u32 = 30;
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// No pending scroll. Return early
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if (self.scroll.pending == 0) return;
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+
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+
const animation_tick: u32 = 8;
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+
const now_ms: u64 = @intCast(std.time.milliTimestamp());
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// Scroll up
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if (self.scroll.pending > 0) {
···
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self.scroll.pending = 0;
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return;
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}
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// At this point, we always redraw
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ctx.redraw = true;
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+
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// If we are past the end of the animation, or on the last tick, consume the rest of the
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// pending scroll
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if (self.animation_end_ms <= now_ms) {
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self.scroll.offset += @intCast(self.scroll.pending);
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self.scroll.pending = 0;
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return;
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+
}
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+
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// Calculate the amount to scroll this tick. We use 8ms ticks.
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// Total time = end_ms - now_ms
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// Lines / ms = self.scroll.pending / total time
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// Lines this tick = 8 ms * lines / ms
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// All together: (8 ms * self.scroll.pending ) / (end_ms - now_ms)
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const delta_scroll = (@as(u64, animation_tick) * @as(u64, @intCast(self.scroll.pending))) /
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(self.animation_end_ms - now_ms);
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// Ensure we always scroll at least one line
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const resolved_scroll = @max(1, delta_scroll);
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+
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// Consume 1 line, and schedule a tick
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-
self.scroll.offset += 1;
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-
self.scroll.pending -= 1;
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+
self.scroll.offset += @intCast(resolved_scroll);
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+
self.scroll.pending -|= @intCast(resolved_scroll);
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ctx.redraw = true;
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return ctx.tick(animation_tick, self.messageViewWidget());
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}
···
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// Scroll down
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if (self.scroll.pending < 0) {
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-
// Consume 1 line, and schedule a tick
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-
self.scroll.offset -= 1;
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-
self.scroll.pending += 1;
929
+
const pending: u16 = @intCast(@abs(self.scroll.pending));
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+
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+
// At this point, we always redraw
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ctx.redraw = true;
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+
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// If we are past the end of the animation, or on the last tick, consume the rest of the
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// pending scroll
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if (self.animation_end_ms <= now_ms) {
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self.scroll.offset -|= pending;
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self.scroll.pending = 0;
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+
return;
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+
}
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// Calculate the amount to scroll this tick. We use 8ms ticks.
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// Total time = end_ms - now_ms
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// Lines / ms = self.scroll.pending / total time
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// Lines this tick = 8 ms * lines / ms
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+
// All together: (8 ms * self.scroll.pending ) / (end_ms - now_ms)
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+
const delta_scroll = (@as(u64, animation_tick) * @as(u64, @intCast(pending))) /
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+
(self.animation_end_ms - now_ms);
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+
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+
// Ensure we always scroll at least one line
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+
const resolved_scroll = @max(1, delta_scroll);
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+
self.scroll.offset -|= @intCast(resolved_scroll);
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self.scroll.pending += @intCast(resolved_scroll);
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ctx.redraw = true;
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return ctx.tick(animation_tick, self.messageViewWidget());
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}
···
2727
2779
pub fn connect(self: *Client) !void {
2728
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if (self.config.tls) {
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const port: u16 = self.config.port orelse 6697;
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-
self.stream = try std.net.tcpConnectToHost(self.alloc, self.config.server, port);
2782
+
self.stream = try tcpConnectToHost(self.alloc, self.config.server, port);
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self.client = try tls.client(self.stream, .{
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.host = self.config.server,
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.root_ca = .{ .bundle = self.app.bundle },
···
3830
3882
};
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3883
}
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3884
};
3885
+
3886
+
/// All memory allocated with `allocator` will be freed before this function returns.
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+
pub fn tcpConnectToHost(allocator: mem.Allocator, name: []const u8, port: u16) std.net.TcpConnectToHostError!std.net.Stream {
3888
+
const list = try std.net.getAddressList(allocator, name, port);
3889
+
defer list.deinit();
3890
+
3891
+
if (list.addrs.len == 0) return error.UnknownHostName;
3892
+
3893
+
for (list.addrs) |addr| {
3894
+
const stream = std.net.tcpConnectToAddress(addr) catch |err| {
3895
+
log.warn("error connecting to host: {}", .{err});
3896
+
continue;
3897
+
};
3898
+
return stream;
3899
+
}
3900
+
return std.posix.ConnectError.ConnectionRefused;
3901
+
}
3833
3902
3834
3903
test "caseFold" {
3835
3904
try testing.expect(caseFold("a", "A"));