Yves Biener
b314ff7813
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The App.Renderer is used for the new `Layout.render` method. Each layout renders itself now with corresponding renderers which might only update parts of the screen, etc.
64 lines
2.1 KiB
Zig
64 lines
2.1 KiB
Zig
//! Renderer which holds the screen to compare with the previous screen for efficient rendering.
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const std = @import("std");
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const terminal = @import("terminal.zig");
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const Contents = std.ArrayList(u8);
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const Position = terminal.Position;
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const Size = terminal.Size;
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pub fn Buffered(comptime fullscreen: bool) type {
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return struct {
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refresh: bool = false,
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size: terminal.Size = undefined,
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screen: Contents = undefined,
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pub fn init(allocator: std.mem.Allocator) @This() {
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return .{
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.fullscreen = fullscreen,
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.screen = Contents.init(allocator),
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};
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}
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pub fn deinit(this: *@This()) void {
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this.screen.deinit();
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this.* = undefined;
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}
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pub fn resize(this: *@This(), size: Size) void {
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// TODO: are there size changes which impact the corresponding rendered content?
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// -> can I even be sure nothing needs to be re-rendered?
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this.size = size;
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this.refresh = true;
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}
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pub fn render(this: *@This(), content: *Contents) !void {
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// TODO: put the corresponding screen to the terminal
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// -> determine diff between screen and new content and only update the corresponding characters of the terminal
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_ = this;
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_ = content;
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@panic("Not yet implemented.");
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}
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};
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}
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pub fn Plain(comptime _: bool) type {
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return struct {
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pub fn clear(this: @This(), anchor: Position, size: Size) !void {
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_ = this;
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_ = size;
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// NOTE: clear entire screen for the first content (derived from the anchor being at the very left-top)
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if (anchor.col == 1 and anchor.row == 1) {
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try terminal.clearScreen();
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}
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}
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pub fn render(this: @This(), anchor: Position, size: Size, contents: *Contents) !void {
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_ = this;
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_ = size;
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// FIXME: this should respect the given `size`
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try terminal.setCursorPosition(anchor);
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_ = try terminal.write(contents.items);
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}
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};
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}
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