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terminal: full redraw state tracking on render state

pull/9662/head
Mitchell Hashimoto 2025-11-18 05:29:19 -10:00
parent bbbeacab79
commit a66963e3f8
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GPG Key ID: 523D5DC389D273BC
1 changed files with 15 additions and 8 deletions
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23
src/terminal/render.zig
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@ -50,6 +50,12 @@ pub const RenderState = struct {
/// use cases.
row_data: std.MultiArrayList(Row),
/// This is set to true if the terminal state has changed in a way
/// that the renderer should do a full redraw of the grid. The renderer
/// should se this to false when it has done so. `update` will only
/// ever tick this to true.
redraw: bool,
/// The screen type that this state represents. This is used primarily
/// to detect changes.
screen: ScreenSet.Key,
@ -60,6 +66,7 @@ pub const RenderState = struct {
.cols = 0,
.viewport_is_bottom = false,
.row_data = .empty,
.redraw = false,
.screen = .primary,
};
@ -104,17 +111,17 @@ pub const RenderState = struct {
alloc: Allocator,
t: *Terminal,
) Allocator.Error!void {
const full_rebuild: bool = rebuild: {
self.redraw = redraw: {
// If our screen key changed, we need to do a full rebuild
// because our render state is viewport-specific.
if (t.screens.active_key != self.screen) break :rebuild true;
if (t.screens.active_key != self.screen) break :redraw true;
// If our terminal is dirty at all, we do a full rebuild. These
// dirty values are full-terminal dirty values.
{
const Int = @typeInfo(Terminal.Dirty).@"struct".backing_integer.?;
const v: Int = @bitCast(t.flags.dirty);
if (v > 0) break :rebuild true;
if (v > 0) break :redraw true;
}
// If our screen is dirty at all, we do a full rebuild. This is
@ -122,14 +129,14 @@ pub const RenderState = struct {
{
const Int = @typeInfo(Screen.Dirty).@"struct".backing_integer.?;
const v: Int = @bitCast(t.screens.active.dirty);
if (v > 0) break :rebuild true;
if (v > 0) break :redraw true;
}
break :rebuild false;
break :redraw false;
};
// Full rebuild resets our state completely.
if (full_rebuild) {
// Full redraw resets our state completely.
if (self.redraw) {
self.* = .empty;
self.screen = t.screens.active_key;
}
@ -177,7 +184,7 @@ pub const RenderState = struct {
var y: size.CellCountInt = 0;
while (row_it.next()) |row_pin| : (y = y + 1) {
// If the row isn't dirty then we assume it is unchanged.
if (!full_rebuild and !row_pin.isDirty()) continue;
if (!self.redraw and !row_pin.isDirty()) continue;
// Promote our arena. State is copied by value so we need to
// restore it on all exit paths so we don't leak memory.