Add optional compact tagline styling for source context

1 files changed, 66 insertions, 11 deletions

diff --git a/src/web.zig b/src/web.zig
index a1f3bad8..a944a4a5 100644
--- a/src/web.zig
+++ b/src/web.zig
@@ -99,6 +99,7 @@ comptime {
 
 const State = struct {
     core: *pardes.Pardes,
+    layer_cells: [pardes.MAX_PANES][]WebCell = @splat(&.{}),
     cells: []WebCell = &.{},
     frame_len: usize = 0,
     frame_cols: u16 = 0,
@@ -127,6 +128,7 @@ const State = struct {
 
     fn deinit(s: *State) void {
         if (s.cells.len > 0) gpa.free(s.cells);
+        for (s.layer_cells) |cells| gpa.free(cells);
         s.core.deinit();
         pardes.image.stop();
         if (comptime pardes.pdf_enabled) pardes.pdf.stop();
@@ -207,6 +209,22 @@ export fn pardes_paste(len_arg: u32) void {
 /// Buttons and kinds are their boundary enum ordinals. Invalid values are
 /// ignored rather than reaching an unchecked enum cast inside wasm.
 export fn pardes_mouse(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u32, mods: u32) void {
+    mouseWithHit(button_arg, kind_arg, col_arg, row_arg, mods, null);
+}
+
+export fn pardes_mouse_pixel(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u32, mods: u32, x: f32, y: f32, bw: f32, bh: f32, tw: f32, th: f32) void {
+    const s = &(state orelse return);
+    const source = s.core.presentation.pointerFractional(s.core.screen_w, s.core.screen_h, x / @max(1, bw), y / @max(1, bh));
+    var hit: ?pardes.Mouse.BodyHit = null;
+    for (&s.core.surface.body_layers) |*layer| {
+        const point = source orelse break;
+        hit = layer.hitAt(point.x * bw, point.y * bh, bw, bh, tw, th);
+        if (hit != null) break;
+    }
+    mouseWithHit(button_arg, kind_arg, col_arg, row_arg, mods, hit);
+}
+
+fn mouseWithHit(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u32, mods: u32, hit: ?pardes.Mouse.BodyHit) void {
     const s = &(state orelse return);
     const button: pardes.Mouse.Button = switch (button_arg) {
         0 => .left,
@@ -229,6 +247,7 @@ export fn pardes_mouse(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u3
         else => return,
     };
     s.core.update(.{ .mouse = .{
+        .body_hit = hit,
         .button = button,
         .kind = kind,
         .col = @intCast(@min(col_arg, std.math.maxInt(u16))),
@@ -304,6 +323,46 @@ export fn pardes_cursor_x() i32 {
     return if (s.core.surface.cursor) |cursor| cursor.x else -1;
 }
 
+export fn pardes_body_layer_value(index: u32, field: u32) u32 {
+    const s = &(state orelse return 0);
+    if (index >= pardes.MAX_PANES) return 0;
+    const layer = &s.core.surface.body_layers[index];
+    return switch (field) {
+        0 => layer.rows,
+        1 => layer.cols,
+        2 => layer.context_rows,
+        3 => layer.viewport.x,
+        4 => layer.viewport.y,
+        5 => layer.viewport.w,
+        6 => layer.viewport.h,
+        7 => layer.serial,
+        8 => if (layer.cursor) |c| c.x else 65535,
+        9 => if (layer.cursor) |c| c.y else 65535,
+        10 => if (layer.cursor) |c| @intFromBool(c.bar) else 0,
+        else => 0,
+    };
+}
+
+export fn pardes_body_layer_cells(index: u32) ?[*]const WebCell {
+    const s = &(state orelse return null);
+    if (index >= pardes.MAX_PANES) return null;
+    const layer = &s.core.surface.body_layers[index];
+    if (layer.rows == 0) return null;
+    const cells = &s.layer_cells[index];
+    if (cells.len != layer.cells.len) cells.* = gpa.realloc(cells.*, layer.cells.len) catch return null;
+    for (layer.cells, cells.*) |cell, *out| out.* = encodeWebCell(cell);
+    return cells.ptr;
+}
+
+export fn pardes_body_layer_limit() u32 {
+    return pardes.MAX_PANES;
+}
+
+export fn pardes_row_metrics(body_w: u16, body_h: u16, tagline_w: u16, tagline_h: u16) void {
+    const s = &(state orelse return);
+    s.core.update(.{ .resize = .{ .cols = s.core.screen_w, .rows = s.core.screen_h, .cell_pixels = s.core.cell_pixels, .row_metrics = .{ .body_w = @max(1, body_w), .body_h = @max(1, body_h), .tagline_w = @max(1, tagline_w), .tagline_h = @max(1, tagline_h) } } });
+}
+
 export fn pardes_pointer_shape() u32 {
     const s = &(state orelse return 0);
     return @intFromEnum(s.core.surface.pointer_shape);
@@ -384,17 +443,13 @@ fn present(ctx: ?*anyopaque, surface: *const pardes.Surface) void {
     s.frame_len = count;
     s.frame_cols = surface.cols;
     s.frame_rows = surface.rows;
-    for (surface.cells, s.cells[0..count]) |cell, *out| {
-        out.* = .{
-            .text = @splat(0),
-            .fg = encodeColor(cell.style.fg),
-            .bg = encodeColor(cell.style.bg),
-            .attrs = encodeAttrs(cell.style),
-            .len = if (cell.default) 1 else cell.len,
-            .flags = @intFromBool(cell.default),
-        };
-        if (cell.default) out.text[0] = ' ' else @memcpy(out.text[0..cell.len], cell.grapheme());
-    }
+    for (surface.cells, s.cells[0..count]) |cell, *out| out.* = encodeWebCell(cell);
+}
+
+fn encodeWebCell(cell: pardes.Cell) WebCell {
+    var out: WebCell = .{ .text = @splat(0), .fg = encodeColor(cell.style.fg), .bg = encodeColor(cell.style.bg), .attrs = encodeAttrs(cell.style), .len = if (cell.default) 1 else cell.len, .flags = @intFromBool(cell.default) };
+    if (cell.default) out.text[0] = ' ' else @memcpy(out.text[0..cell.len], cell.grapheme());
+    return out;
 }
 
 fn writeFile(_: ?*anyopaque, _: u8, path: []const u8, bytes: []const u8) void {