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WIP: use viewport to allow sizes of scroll to extend further than renderable screen

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Yves Biener
2025-02-12 22:33:03 +01:00
parent 98031dbd1a
commit bbe6f4741e
9 changed files with 119 additions and 51 deletions
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12
src/render.zig
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@@ -2,8 +2,8 @@ const std = @import("std");
const terminal = @import("terminal.zig");
const Cell = @import("cell.zig");
const Size = @import("size.zig");
const Position = Size.Position;
const Position = @import("size.zig").Position;
const Size = @import("size.zig").Size;
/// Double-buffered intermediate rendering pipeline
pub const Buffered = struct {
@@ -62,17 +62,17 @@ pub const Buffered = struct {
/// Render provided cells at size (anchor and dimension) into the *virtual screen*.
pub fn render(this: *@This(), comptime T: type, container: *T) !void {
const size: Size = container.size;
const viewport: Size = container.viewport;
const cells: []const Cell = try container.contents();
if (cells.len == 0) return;
var idx: usize = 0;
var vs = this.virtual_screen;
const anchor = (size.anchor.row * this.size.cols) + size.anchor.col;
const anchor = (viewport.anchor.row * this.size.cols) + viewport.anchor.col;
blk: for (0..size.rows) |row| {
for (0..size.cols) |col| {
blk: for (0..viewport.rows) |row| {
for (0..viewport.cols) |col| {
const cell = cells[idx];
idx += 1;