view: implemented an easy mechanism for vertical and horizontal scrolling
- Implemented View as an easy way to use the existing Screen and Window APIs for rendering Cells that don't fit within a Window. Basically, a user renders the oversized Cell content to a View, then renders a part of that View to a Window. - Created the `view.zig` example.
This commit is contained in:
00JCIV00
Tim Culverhouse
parent
a1b43d2465
commit
94bec1ec2a
4 changed files with 426 additions and 1 deletions
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@ -51,6 +51,7 @@ pub fn build(b: *std.Build) void {
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// Examples
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const Example = enum {
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aio,
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cli,
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image,
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main,
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@ -58,9 +59,9 @@ pub fn build(b: *std.Build) void {
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table,
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text_input,
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vaxis,
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view,
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vt,
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xev,
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aio,
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};
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const example_option = b.option(Example, "example", "Example to run (default: text_input)") orelse .text_input;
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const example_step = b.step("example", "Run example");
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270
examples/view.zig
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270
examples/view.zig
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@ -0,0 +1,270 @@
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const std = @import("std");
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const log = std.log.scoped(.main);
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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 View = vaxis.View;
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const Cell = vaxis.Cell;
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const border = vaxis.widgets.border;
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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 x: usize = 0;
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var y: usize = 0;
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var h: usize = 0;
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var w: usize = 0;
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defer log.info(
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\\Map Size: {d}x{d}
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\\Screen Size: {d}x{d}
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\\Position: {d}, {d}
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, .{
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map_width, map_height,
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w, h,
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x, y,
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}
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);
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var tty = try vaxis.Tty.init();
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defer tty.deinit();
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var buffered_writer = tty.bufferedWriter();
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const writer = buffered_writer.writer().any();
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// Initialize Vaxis
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var vx = try vaxis.init(alloc, .{
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.kitty_keyboard_flags = .{ .report_events = true },
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});
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defer vx.deinit(alloc, tty.anyWriter());
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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(writer);
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try buffered_writer.flush();
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try vx.queryTerminal(tty.anyWriter(), 20 * std.time.ns_per_s);
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// Initialize a View
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var map_view = try View.init(alloc, &vx.unicode, .{ .max_width = map_width, .max_height = map_height });
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defer map_view.deinit();
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w = map_view.screen.width;
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h = map_view.screen.height;
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var map_buf: [map_width * map_height]u8 = undefined;
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_ = mem.replace(u8, world_map, "\n", "", map_buf[0..]);
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_ = try map_view.printSegment(.{ .text = map_buf[0..] }, .{ .wrap = .grapheme });
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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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if (key.matches('c', .{ .ctrl = true })) break;
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if (key.matches(vaxis.Key.left, .{})) x -|= 1;
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if (key.matches(vaxis.Key.right, .{})) x +|= 1;
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if (key.matches(vaxis.Key.up, .{})) y -|= 1;
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if (key.matches(vaxis.Key.down, .{})) y +|= 1;
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},
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.winsize => |ws| try vx.resize(alloc, tty.anyWriter(), ws),
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}
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x = @min(x, map_width -| 1);
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y = @min(y, map_height -| 1);
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const win = vx.window();
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win.clear();
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try map_view.toWin(
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&win,
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.{
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.x = x,
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.y = y,
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//.width = .{ .max = 10 },
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//.height = .{ .max = 10 },
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}
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);
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// Render the screen
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try vx.render(writer);
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try buffered_writer.flush();
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}
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}
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const _world_map =
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\\ +NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN+
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\\ W................................................................................................E
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\\ W................................................................................................E
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\\ W............................ @:::::::::@ ..................... .............................E
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\\ W..... . ..... ::: ...::::::: ........ ...... %@%...........:*%@ . ..............E
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\\ W............... #############= ............. ========== ................. . ..*. . --- .......E
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\\
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;
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const world_map =
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\\ +NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN+
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\\ W...........................................................................................................................................................................................................................................................................................................................................................................................................E
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\\ W................................ =.@ -@::::::::.% ..... -@::::*@@ .................................................................... #-===============================================================:@ @:........................+ .. %........................................................@% ...........................................................................E
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\\ W............................................. *%::::::::::@ ............................................................................. +-=====================================================================*@ #........-#@ .................. #........** ........ @..............- ....... @:..@# ................................................................E
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\\ W................................................................... @##################################################@@ ...................................................... =-=====================================-@ .................................................................... @....% @........@ @....# .... #+--+##---=@% .....................................E
|
||||
\\ W................................................................... %##############%@@@#@@@#@%@%@@@#@%@@#################@. ..................................................... @-===================================-@ ........................................................................ %@..@ @@@@#@ .....+ ..... @+=-----------+@ ..................................E
|
||||
\\ W................................................................... @###############@@###@#@#@%@%#@%#@@@@####################@= .................................................... @-==================================@ .......................................................................... @..@ .:@@@@ ...... @------------#@ .................................E
|
||||
\\ W................................................................... +%################@@#@#@#@%@%#@%#@@@@#####################* ..................................................... :-=================================@ ............................................................................. *...:@@@@# ........... #-----------@ ................................E
|
||||
\\ W.................................................................... @#############%@%@#@#@#@%@##@%#@%@@#####################@ ...................................................... @=================================@ .............................................................................. @........@# ...................... @------------@ ...............................E
|
||||
\\ W..................................................................... #######################################################. ....................................................... @=================================@ .............................................................................. @@%.++@ ............... .. :+:@---@ @--*% ..............................E
|
||||
\\ W..................................................................... @############@@#%@%%@%@@@#@@@#@#%@@%#@@##############% ........................................................ .*=================================== .................................................................................. .............. @%%@@ .............................E
|
||||
\\ W....................................................................... @###########@@#%@@@@%@@##@#@#@#@%@@#@@@#############* ........................................................ %=================================-# .... ................................................................................................. %=@@@@= . :@ .............................E
|
||||
\\ W........................................................................ @#########%@@@%@@@@%@@@%@@@#@#@%###@%@###########@ ........................................................ @-=================================% ... :*@ ........................................................................................ @------+ . -=-@ .... ...............................E
|
||||
\\ W......................................................................... @########@@@@%@@@@%@@#%@#@#@#@%@@%@@@########### ......................................................... @===================================% @-=+ ....................................................................................... #@@@@%@--------: @--+ .....................................E
|
||||
\\ W.......................................................................... @############################%#################+ ......................................................... ===================================-@ =@@===+ .................................................................................... %=--------------= .=---=+ ....................................E
|
||||
\\ W........................................................................... @@#########################################** ......................................................... ==================================-@ @-======@ ................................................................................... %+------------------*@= @-----# ....................................E
|
||||
\\ W.............................................................................. @#######################################@ ......................................................... +===============================-@ =======% ................................................................................. .@-----------------------------# ....................................E
|
||||
\\ W................................................................................. =#######################################@ ......................................................... -+============================-@ . @=====+ ................................................................................ :@--------------------------------%* ..................................E
|
||||
\\ W................................................................................. @#####################################@ ........................................................... --==========================@ .. @====-@ .............................................................................. @--------------------------------------@ .................................E
|
||||
\\ W.................................................................................. @#####################################@ ............................................................. %==========================@ ... @-=====@ ............................................................................. @-----------------------------------------% ................................E
|
||||
\\ W.................................................................................. @*#################################%@ .............................................................. %=========================@ ... +-====* ............................................................................. @-----+@@-@*@@-@@@*@@@*@@#-@@=-@--@-*@@-----=@ ...............................E
|
||||
\\ W.................................................................................. :*############################+@* ................................................................ %========================-@ ... @-==-@ .............................................................................. *-----@+@-@*@@+@---#@-*@*@-@*#-@--@-@+@-------* ..............................E
|
||||
\\ W.................................................................................. :*###########################@ ..................................................................... @-=======================* ..... @@-@ .............................................................................. *-----@-@-@*@@--@@-#@-*@%@-@=@-@--@-@-@-------@ ..............................E
|
||||
\\ W.................................................................................. :*########################### ........................................................................ =+=====================@ ....... ............................................................................... @-----@#@+@#@@+@-@-#@-*@+@*@%@-@--@-@#@+------@ ..............................E
|
||||
\\ W.................................................................................. :############################@ ........................................................................ #===================*. ................................................................................................ @---------------------------------------------= ...............................E
|
||||
\\ W.................................................................................. %##########################@ ......................................................................... +================-@ ................................................................................................ =--------------------------------------------# ...............................E
|
||||
\\ W.................................................................................. @#########################@ ........................................................................... @================@ .................................................................................................. @-------------------------------------------@ ................................E
|
||||
\\ W................................................................................... @#######################%* ............................................................................. @-===========-@: .................................................................................................... *----------------------------------------+@ .................................E
|
||||
\\ W................................................................................... @#######################* ............................................................................... *:=========-@* ...................................................................................................... *----% @--------------------@ .................. ..........E
|
||||
\\ W................................................................................... @#####################%= ................................................................................ .@-=-#%%%%@ ........................................................................................................ :*... @------------------@ .................. @@ ..........E
|
||||
\\ W................................................................................... @####################@ ................................................................................. ........................................................................................................... ........... @--------------@ .................... @--@ .........E
|
||||
\\ W................................................................................... %#################### ..................................................................................... ...................................................................................................................................... @-----------=. ..................... @---@: .......E
|
||||
\\ W................................................................................... @##################% ................................................................................................................................................................................................................................... .%=---------@ .................... @#-----@ .......E
|
||||
\\ W.................................................................................... @##############%@- .................................................................................................................................................................................................................................... @@@ .................. ==----=@ .......E
|
||||
\\ W.................................................................................... @#############@ ......................................................................................................................................................................................................................................... ................... @+----@ .........E
|
||||
\\ W..................................................................................... @############ .................................................................................................................................................................................................................................................................... %@----*@: .............E
|
||||
\\ W...................................................................................... %##########= ................................................................................................................................................................................................................................................................. @-----@ ...............E
|
||||
\\ W...................................................................................... @#########@ ................................................................................................................................................................................................................................................................. =@-----#@# ..................E
|
||||
\\ W....................................................................................... %#######@ ................................................................................................................................................................................................................................................................. %--+@#% ....................E
|
||||
\\ W....................................................................................... @#######@@. ................................................................................................................................................................................................................................................................. ........................E
|
||||
\\ W........................................................................................ @########@ .................................................................................................................................................................................................................................................................. .............................E
|
||||
\\ W......................................................................................... @#####%. ....................................................................................................................................................................................................................................................................................................E
|
||||
\\ W.......................................................................................... @#####+ ....................................................................................................................................................................................................................................................................................................E
|
||||
\\ W........................................................................................... @#####@ .................................................................................................................................................................................................................................................................................................E
|
||||
\\ W............................................................................................ +@@@##%@# ...............................................................................................................................................................................................................................................................................................E
|
||||
\\ W............................................................................................. +@@@@@ ...............................................................................................................................................................................................................................................................................................E
|
||||
\\ W................................................................................................. ................................................................................................................................................................................................................................................................................................E
|
||||
\\ W...........................................................................................................................................................................................................................................................................................................................................................................................................E
|
||||
\\ W...........................................................................................................................................................................................................................................................................................................................................................................................................E
|
||||
\\ W...........................................................................................................................................................................................................................................................................................................................................................................................................E
|
||||
\\ +SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS+
|
||||
\\
|
||||
;
|
||||
const map_width = mapWidth: {
|
||||
@setEvalBranchQuota(100_000);
|
||||
break :mapWidth mem.indexOfScalar(u8, world_map, '\n').?;
|
||||
};
|
||||
const map_height = mapHeight: {
|
||||
@setEvalBranchQuota(100_000);
|
||||
break :mapHeight mem.count(u8, world_map, "\n");
|
||||
};
|
||||
153
src/View.zig
Normal file
153
src/View.zig
Normal file
|
|
@ -0,0 +1,153 @@
|
|||
//! A View is effectively an "oversized" Window that can be written to and rendered in pieces.
|
||||
|
||||
const std = @import("std");
|
||||
const mem = std.mem;
|
||||
|
||||
const View = @This();
|
||||
|
||||
const Screen = @import("Screen.zig");
|
||||
const Window = @import("Window.zig");
|
||||
const Unicode = @import("Unicode.zig");
|
||||
const Cell = @import("Cell.zig");
|
||||
|
||||
/// View Allocator
|
||||
alloc: mem.Allocator,
|
||||
/// Underlying Screen
|
||||
screen: *Screen,
|
||||
/// Underlying Window
|
||||
win: *Window,
|
||||
|
||||
|
||||
pub const Config = struct {
|
||||
max_width: usize = 10_000,
|
||||
max_height: usize = 10_000,
|
||||
x_pixel: usize = 0,
|
||||
y_pixel: usize = 0,
|
||||
};
|
||||
pub fn init(alloc: mem.Allocator, unicode: *const Unicode, config: Config) !View {
|
||||
const screen = try alloc.create(Screen);
|
||||
screen.* = try Screen.init(
|
||||
alloc,
|
||||
.{
|
||||
.cols = config.max_width,
|
||||
.rows = config.max_height,
|
||||
.x_pixel = config.x_pixel,
|
||||
.y_pixel = config.y_pixel,
|
||||
},
|
||||
unicode,
|
||||
);
|
||||
const window = try alloc.create(Window);
|
||||
window.* = .{
|
||||
.x_off = 0,
|
||||
.y_off = 0,
|
||||
.width = config.max_width,
|
||||
.height = config.max_height,
|
||||
.screen = screen,
|
||||
};
|
||||
return .{
|
||||
.alloc = alloc,
|
||||
.screen = screen,
|
||||
.win = window,
|
||||
};
|
||||
}
|
||||
|
||||
pub fn deinit(self: *View) void {
|
||||
self.alloc.destroy(self.win);
|
||||
self.screen.deinit(self.alloc);
|
||||
self.alloc.destroy(self.screen);
|
||||
}
|
||||
|
||||
///Render Config f/ `toWin()`
|
||||
pub const RenderConfig = struct {
|
||||
x: usize = 0,
|
||||
y: usize = 0,
|
||||
width: Extent = .fit,
|
||||
height: Extent = .fit,
|
||||
|
||||
pub const Extent = union(enum) {
|
||||
fit,
|
||||
max: usize,
|
||||
};
|
||||
};
|
||||
/// Render a portion of this View to the provided Window (`win`).
|
||||
pub fn toWin(self: *View, win: *const Window, config: RenderConfig) !void {
|
||||
//if (config.x >= self.screen.width or config.y >= self.screen.height)
|
||||
// return error.PositionOutOfBounds;
|
||||
const x = @min(self.screen.width - 1, config.x);
|
||||
const y = @min(self.screen.height - 1, config.y);
|
||||
const width = width: {
|
||||
const width = switch (config.width) {
|
||||
.fit => win.width,
|
||||
.max => |w| @min(win.width, w),
|
||||
};
|
||||
break :width @min(width, self.screen.width -| x);
|
||||
};
|
||||
const height = height: {
|
||||
const height = switch (config.height) {
|
||||
.fit => win.height,
|
||||
.max => |h| @min(win.height, h),
|
||||
};
|
||||
break :height @min(height, self.screen.height -| y);
|
||||
};
|
||||
//win.clear();
|
||||
for (0..height) |row| {
|
||||
for (0..width) |col| {
|
||||
win.writeCell(
|
||||
col,
|
||||
row,
|
||||
self.win.readCell(
|
||||
@min(self.screen.width, x +| col),
|
||||
//self.screen.height -| 1 -| @min(self.screen.height, y +| row),
|
||||
@min(self.screen.height, y +| row),
|
||||
) orelse {
|
||||
std.log.err(
|
||||
\\ Position Out of Bounds:
|
||||
\\ - Pos: {d}, {d}
|
||||
\\ - Size: {d}, {d}
|
||||
, .{
|
||||
col, row,
|
||||
self.screen.width, self.screen.height,
|
||||
},
|
||||
);
|
||||
return error.PositionOutOfBounds;
|
||||
},
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Writes a cell to the location in the View
|
||||
pub fn writeCell(self: View, col: usize, row: usize, cell: Cell) void {
|
||||
self.win.writeCell(col, row, cell);
|
||||
}
|
||||
|
||||
/// Reads a cell at the location in the View
|
||||
pub fn readCell(self: View, col: usize, row: usize) ?Cell {
|
||||
return self.win.readCell(col, row);
|
||||
}
|
||||
|
||||
/// Fills the View with the default cell
|
||||
pub fn clear(self: View) void {
|
||||
self.win.clear();
|
||||
}
|
||||
|
||||
/// Returns the width of the grapheme. This depends on the terminal capabilities
|
||||
pub fn gwidth(self: View, str: []const u8) usize {
|
||||
return self.win.gwidth(str);
|
||||
}
|
||||
|
||||
/// Fills the View with the provided cell
|
||||
pub fn fill(self: View, cell: Cell) void {
|
||||
self.fill(cell);
|
||||
}
|
||||
|
||||
/// Prints segments to the View. Returns true if the text overflowed with the
|
||||
/// given wrap strategy and size.
|
||||
pub fn print(self: View, segments: []const Cell.Segment, opts: Window.PrintOptions) !Window.PrintResult {
|
||||
return self.win.print(segments, opts);
|
||||
}
|
||||
|
||||
/// Print a single segment. This is just a shortcut for print(&.{segment}, opts)
|
||||
pub fn printSegment(self: View, segment: Cell.Segment, opts: Window.PrintOptions) !Window.PrintResult {
|
||||
return self.print(&.{segment}, opts);
|
||||
}
|
||||
|
|
@ -30,6 +30,7 @@ pub const GraphemeCache = @import("GraphemeCache.zig");
|
|||
pub const grapheme = @import("grapheme");
|
||||
pub const Event = @import("event.zig").Event;
|
||||
pub const Unicode = @import("Unicode.zig");
|
||||
pub const View = @import("View.zig");
|
||||
|
||||
/// The target TTY implementation
|
||||
pub const Tty = switch (builtin.os.tag) {
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue