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feat: add support for scrolling and transparent windows in vaxis backend

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This commit is contained in:
CJ van den Berg 2024-05-18 16:49:01 +02:00
parent 0707b52d8a
commit 8c9338ddd2
1 changed files with 29 additions and 14 deletions
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43
src/renderer/vaxis/Plane.zig
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@ -15,6 +15,8 @@ name_len: usize,
cache: GraphemeCache = .{},
style: vaxis.Cell.Style = .{},
style_base: vaxis.Cell.Style = .{},
scrolling: bool = false,
transparent: bool = false,
pub const Options = struct {
y: usize = 0,
@ -42,6 +44,7 @@ pub fn init(nopts: *const Options, parent_: Plane) !Plane {
.window = parent_.window.child(opts),
.name_buf = undefined,
.name_len = std.mem.span(nopts.name).len,
.scrolling = nopts.flags == .VSCROLL,
};
@memcpy(plane.name_buf[0..plane.name_len], nopts.name);
return plane;
@ -135,6 +138,7 @@ pub fn print_aligned_center(self: *Plane, y: c_int, comptime fmt: anytype, args:
pub fn putstr(self: *Plane, text: []const u8) !usize {
var result: usize = 0;
const height = self.window.height;
const width = self.window.width;
var iter = self.window.screen.unicode.graphemeIterator(text);
while (iter.next()) |grapheme| {
@ -142,21 +146,15 @@ pub fn putstr(self: *Plane, text: []const u8) !usize {
return result;
const s = grapheme.bytes(text);
if (std.mem.eql(u8, s, "\n")) {
self.row += 1;
if (self.scrolling and self.row == height - 1)
self.window.scroll(1)
else
self.row += 1;
self.col = 0;
result += 1;
continue;
}
const w = self.window.gwidth(s);
if (w == 0) continue;
self.window.writeCell(@intCast(self.col), @intCast(self.row), .{
.char = .{
.grapheme = self.cache.put(s),
.width = w,
},
.style = self.style,
});
self.col += @intCast(w);
self.write_cell(@intCast(self.col), @intCast(self.row), s);
result += 1;
}
return result;
@ -175,6 +173,20 @@ pub fn putc_yx(self: *Plane, y: c_int, x: c_int, cell: *const Cell) !usize {
return w;
}
fn write_cell(self: *Plane, col: usize, row: usize, egc: []const u8) void {
var cell: vaxis.Cell = self.window.readCell(col, row) orelse .{ .style = self.style };
const w = self.window.gwidth(egc);
cell.char.grapheme = self.cache.put(egc);
cell.char.width = w;
if (self.transparent) {
cell.style.fg = self.style.fg;
} else {
cell.style = self.style;
}
self.window.writeCell(col, row, cell);
self.col += @intCast(w);
}
pub fn cursor_yx(self: Plane, y: *c_uint, x: *c_uint) void {
y.* = @intCast(self.row);
x.* = @intCast(self.col);
@ -212,7 +224,6 @@ pub fn cell_init(self: Plane) Cell {
}
pub fn cell_load(self: *Plane, cell: *Cell, gcluster: [:0]const u8) !usize {
cell.* = .{ .cell = .{ .style = self.style } };
var cols: c_int = 0;
const bytes = self.egc_length(gcluster, &cols, 0);
cell.cell.char.grapheme = self.cache.put(gcluster[0..bytes]);
@ -275,28 +286,32 @@ pub inline fn set_base_style(self: *Plane, _: [*c]const u8, style_: Style) void
pub fn set_base_style_transparent(self: *Plane, _: [*:0]const u8, style_: Style) void {
self.style_base.fg = if (style_.fg) |color| vaxis.Cell.Color.rgbFromUint(@intCast(color)) else .default;
self.style_base.bg = if (style_.bg) |color| vaxis.Cell.Color.rgbFromUint(@intCast(color)) else .default;
self.style.bg = .default;
if (style_.fs) |fs| set_font_style(&self.style, fs);
self.set_style(style_);
self.transparent = true;
}
pub fn set_base_style_bg_transparent(self: *Plane, _: [*:0]const u8, style_: Style) void {
self.style_base.fg = if (style_.fg) |color| vaxis.Cell.Color.rgbFromUint(@intCast(color)) else .default;
self.style_base.bg = if (style_.bg) |color| vaxis.Cell.Color.rgbFromUint(@intCast(color)) else .default;
self.style.bg = .default;
if (style_.fs) |fs| set_font_style(&self.style, fs);
self.set_style(style_);
self.transparent = true;
}
pub inline fn set_style(self: *Plane, style_: Style) void {
if (style_.fg) |color| self.style.fg = vaxis.Cell.Color.rgbFromUint(@intCast(color));
if (style_.bg) |color| self.style.bg = vaxis.Cell.Color.rgbFromUint(@intCast(color));
if (style_.fs) |fs| set_font_style(&self.style, fs);
self.transparent = false;
}
pub inline fn set_style_bg_transparent(self: *Plane, style_: Style) void {
if (style_.fg) |color| self.style.fg = vaxis.Cell.Color.rgbFromUint(@intCast(color));
self.style.bg = .default;
if (style_.fs) |fs| set_font_style(&self.style, fs);
self.transparent = true;
}
inline fn set_font_style(style: *vaxis.Cell.Style, fs: FontStyle) void {