examples: remove pause_tui
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Tim Culverhouse
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1 changed files with 0 additions and 139 deletions
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@ -1,139 +0,0 @@
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const std = @import("std");
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const mem = std.mem;
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const process = std.process;
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const vaxis = @import("vaxis");
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const Cell = vaxis.Cell;
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const TextInput = vaxis.widgets.TextInput;
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const border = vaxis.widgets.border;
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const log = std.log.scoped(.main);
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// Our Event. This can contain internal events as well as Vaxis events.
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// Internal events can be posted into the same queue as vaxis events to allow
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// for a single event loop with exhaustive switching. Booya
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const Event = union(enum) {
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key_press: vaxis.Key,
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mouse: vaxis.Mouse,
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winsize: vaxis.Winsize,
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focus_in,
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focus_out,
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foo: u8,
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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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//fail test; can't try in defer as defer is executed after we return
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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 tty = try vaxis.Tty.init();
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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.anyWriter());
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var loop: vaxis.Loop(Event) = .{ .tty = &tty, .vaxis = &vx };
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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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// We'll adjust the color index every keypress for the border
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var color_idx: u8 = 0;
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// init our text input widget. The text input widget needs an allocator to
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// store the contents of the input
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var text_input = TextInput.init(alloc);
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defer text_input.deinit();
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// Sends queries to terminal to detect certain features. This should
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// _always_ be called, but is left to the application to decide when
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try vx.queryTerminal(tty.anyWriter(), 1 * std.time.ns_per_s);
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try vx.setMouseMode(true);
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// The main event loop. Vaxis provides a thread safe, blocking, buffered
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// queue which can serve as the primary event queue for an application
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while (true) {
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// nextEvent blocks until an event is in the queue
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const event = vx.nextEvent();
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log.debug("event: {}", .{event});
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// exhaustive switching ftw. Vaxis will send events if your Event
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// enum has the fields for those events (ie "key_press", "winsize")
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switch (event) {
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.key_press => |key| {
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color_idx = switch (color_idx) {
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255 => 0,
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else => color_idx + 1,
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};
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if (key.matches('c', .{ .ctrl = true })) {
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break;
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} else if (key.matches('l', .{ .ctrl = true })) {
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vx.queueRefresh();
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} else if (key.matches('z', .{ .ctrl = true })) {
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try openDirVim(alloc, &vx, "examples");
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} else {
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try text_input.update(.{ .key_press = key });
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}
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},
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// winsize events are sent to the application to ensure that all
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// resizes occur in the main thread. This lets us avoid expensive
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// locks on the screen. All applications must handle this event
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// unless they aren't using a screen (IE only detecting features)
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//
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// This is the only call that the core of Vaxis needs an allocator
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// for. The allocations are because we keep a copy of each cell to
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// optimize renders. When resize is called, we allocated two slices:
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// one for the screen, and one for our buffered screen. Each cell in
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// the buffered screen contains an ArrayList(u8) to be able to store
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// the grapheme for that cell Each cell is initialized with a size
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// of 1, which is sufficient for all of ASCII. Anything requiring
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// more than one byte will incur an allocation on the first render
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// after it is drawn. Thereafter, it will not allocate unless the
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// screen is resized
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.winsize => |ws| try vx.resize(alloc, tty.anyWriter(), ws),
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else => {},
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}
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// vx.window() returns the root window. This window is the size of the
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// terminal and can spawn child windows as logical areas. Child windows
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// cannot draw outside of their bounds
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const win = vx.window();
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// Clear the entire space because we are drawing in immediate mode.
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// vaxis double buffers the screen. This new frame will be compared to
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// the old and only updated cells will be drawn
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win.clear();
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const child = win.initChild(
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win.width / 2 - 20,
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win.height / 2 - 3,
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.{ .limit = 40 },
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.{ .limit = 3 },
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);
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// draw the text_input using a bordered window
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const style: vaxis.Style = .{
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.fg = .{ .index = color_idx },
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};
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text_input.draw(border.all(child, style));
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// Render the screen
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try vx.render(tty.anyWriter());
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}
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}
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/// Open the provided Directory in a temp Vim session, pausing the TUI.
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fn openDirVim(alloc: mem.Allocator, vx: anytype, path: []const u8) !void {
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try vx.exitAltScreen();
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vx.stopReadThread();
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var dir_look = process.Child.init(&.{ "vim", "-R", path }, alloc);
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_ = try dir_look.spawnAndWait();
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try vx.startReadThread();
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try vx.enterAltScreen();
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vx.queueRefresh();
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}
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