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const std = @import("std");
const Allocator = std.mem.Allocator;
const input = @import("../input.zig");
const CircBuf = @import("../datastruct/main.zig").CircBuf;
const cimgui = @import("cimgui");
/// Circular buffer of key events.
pub const EventRing = CircBuf(Event, undefined);
/// Represents a recorded keyboard event.
pub const Event = struct {
/// The input event.
event: input.KeyEvent,
/// The binding that was triggered as a result of this event.
binding: ?input.Binding.Action = null,
/// The data sent to the pty as a result of this keyboard event.
/// This is allocated using the inspector allocator.
pty: []const u8 = "",
/// State for the inspector GUI. Do not set this unless you're the inspector.
imgui_state: struct {
selected: bool = false,
} = .{},
pub fn init(alloc: Allocator, event: input.KeyEvent) !Event {
var copy = event;
copy.utf8 = "";
if (event.utf8.len > 0) copy.utf8 = try alloc.dupe(u8, event.utf8);
return .{ .event = copy };
}
pub fn deinit(self: *const Event, alloc: Allocator) void {
if (self.event.utf8.len > 0) alloc.free(self.event.utf8);
if (self.pty.len > 0) alloc.free(self.pty);
}
/// Returns a label that can be used for this event. This is null-terminated
/// so it can be easily used with C APIs.
pub fn label(self: *const Event, buf: []u8) ![:0]const u8 {
var buf_stream = std.io.fixedBufferStream(buf);
const writer = buf_stream.writer();
switch (self.event.action) {
.press => try writer.writeAll("Press: "),
.release => try writer.writeAll("Release: "),
.repeat => try writer.writeAll("Repeat: "),
}
if (self.event.mods.shift) try writer.writeAll("Shift+");
if (self.event.mods.ctrl) try writer.writeAll("Ctrl+");
if (self.event.mods.alt) try writer.writeAll("Alt+");
if (self.event.mods.super) try writer.writeAll("Super+");
// Write our key. If we have an invalid key we attempt to write
// the utf8 associated with it if we have it to handle non-ascii.
try writer.writeAll(switch (self.event.key) {
.unidentified => if (self.event.utf8.len > 0) self.event.utf8 else @tagName(self.event.key),
else => @tagName(self.event.key),
});
// Deadkey
if (self.event.composing) try writer.writeAll(" (composing)");
// Null-terminator
try writer.writeByte(0);
return buf[0..(buf_stream.getWritten().len - 1) :0];
}
/// Render this event in the inspector GUI.
pub fn render(self: *const Event) void {
_ = cimgui.c.igBeginTable(
"##event",
2,
cimgui.c.ImGuiTableFlags_None,
.{ .x = 0, .y = 0 },
0,
);
defer cimgui.c.igEndTable();
if (self.binding) |binding| {
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("Triggered Binding");
_ = cimgui.c.igTableSetColumnIndex(1);
cimgui.c.igText("%s", @tagName(binding).ptr);
}
pty: {
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("Encoding to Pty");
_ = cimgui.c.igTableSetColumnIndex(1);
if (self.pty.len == 0) {
cimgui.c.igTextDisabled("(no data)");
break :pty;
}
self.renderPty() catch {
cimgui.c.igTextDisabled("(error rendering pty data)");
break :pty;
};
}
{
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("Action");
_ = cimgui.c.igTableSetColumnIndex(1);
cimgui.c.igText("%s", @tagName(self.event.action).ptr);
}
{
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("Key");
_ = cimgui.c.igTableSetColumnIndex(1);
cimgui.c.igText("%s", @tagName(self.event.key).ptr);
}
if (!self.event.mods.empty()) {
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("Mods");
_ = cimgui.c.igTableSetColumnIndex(1);
if (self.event.mods.shift) cimgui.c.igText("shift ");
if (self.event.mods.ctrl) cimgui.c.igText("ctrl ");
if (self.event.mods.alt) cimgui.c.igText("alt ");
if (self.event.mods.super) cimgui.c.igText("super ");
}
if (self.event.composing) {
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("Composing");
_ = cimgui.c.igTableSetColumnIndex(1);
cimgui.c.igText("true");
}
utf8: {
cimgui.c.igTableNextRow(cimgui.c.ImGuiTableRowFlags_None, 0);
_ = cimgui.c.igTableSetColumnIndex(0);
cimgui.c.igText("UTF-8");
_ = cimgui.c.igTableSetColumnIndex(1);
if (self.event.utf8.len == 0) {
cimgui.c.igTextDisabled("(empty)");
break :utf8;
}
self.renderUtf8(self.event.utf8) catch {
cimgui.c.igTextDisabled("(error rendering utf-8)");
break :utf8;
};
}
}
fn renderUtf8(self: *const Event, utf8: []const u8) !void {
_ = self;
// Format the codepoint sequence
var buf: [1024]u8 = undefined;
var buf_stream = std.io.fixedBufferStream(&buf);
const writer = buf_stream.writer();
if (std.unicode.Utf8View.init(utf8)) |view| {
var it = view.iterator();
while (it.nextCodepoint()) |cp| {
try writer.print("U+{X} ", .{cp});
}
} else |_| {
try writer.writeAll("(invalid utf-8)");
}
try writer.writeByte(0);
// Render as a textbox
_ = cimgui.c.igInputText(
"##utf8",
&buf,
buf_stream.getWritten().len - 1,
cimgui.c.ImGuiInputTextFlags_ReadOnly,
null,
null,
);
}
fn renderPty(self: *const Event) !void {
// Format the codepoint sequence
var buf: [1024]u8 = undefined;
var buf_stream = std.io.fixedBufferStream(&buf);
const writer = buf_stream.writer();
for (self.pty) |byte| {
// Print ESC special because its so common
if (byte == 0x1B) {
try writer.writeAll("ESC ");
continue;
}
// Print ASCII as-is
if (byte > 0x20 and byte < 0x7F) {
try writer.writeByte(byte);
continue;
}
// Everything else as a hex byte
try writer.print("0x{X} ", .{byte});
}
try writer.writeByte(0);
// Render as a textbox
_ = cimgui.c.igInputText(
"##pty",
&buf,
buf_stream.getWritten().len - 1,
cimgui.c.ImGuiInputTextFlags_ReadOnly,
null,
null,
);
}
};
test "event string" {
const testing = std.testing;
const alloc = testing.allocator;
var event = try Event.init(alloc, .{ .key = .key_a });
defer event.deinit(alloc);
var buf: [1024]u8 = undefined;
try testing.expectEqualStrings("Press: key_a", try event.label(&buf));
}
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