1 files changed, 51 insertions, 3 deletions

diff --git a/src/web.zig b/src/web.zig
index 46e8c3b4..a4e46276 100644
--- a/src/web.zig
+++ b/src/web.zig
@@ -99,6 +99,7 @@ comptime {
 
 const State = struct {
     core: *pardes.Pardes,
+    tag_cells: [pardes.MAX_TAG_LAYERS][]WebCell = @splat(&.{}),
     layer_cells: [pardes.MAX_PANES][]WebCell = @splat(&.{}),
     cells: []WebCell = &.{},
     frame_len: usize = 0,
@@ -129,6 +130,7 @@ 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);
+        for (s.tag_cells) |cells| gpa.free(cells);
         s.core.deinit();
         pardes.image.stop();
         if (comptime pardes.pdf_enabled) pardes.pdf.stop();
@@ -209,7 +211,7 @@ 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);
+    mouseWithHit(button_arg, kind_arg, col_arg, row_arg, mods, null, 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 {
@@ -221,10 +223,16 @@ export fn pardes_mouse_pixel(button_arg: u32, kind_arg: u32, col_arg: u32, row_a
         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);
+    var tag_hit: ?pardes.TagHit = null;
+    for (&s.core.surface.tag_layers) |*layer| {
+        const point = source orelse break;
+        tag_hit = layer.hitAt(point.x * bw, point.y * bh, bw, bh, tw, th);
+        if (tag_hit != null) break;
+    }
+    mouseWithHit(button_arg, kind_arg, col_arg, row_arg, mods, hit, tag_hit);
 }
 
-fn mouseWithHit(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u32, mods: u32, hit: ?pardes.Mouse.BodyHit) void {
+fn mouseWithHit(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u32, mods: u32, hit: ?pardes.Mouse.BodyHit, tag_hit: ?pardes.TagHit) void {
     const s = &(state orelse return);
     const button: pardes.Mouse.Button = switch (button_arg) {
         0 => .left,
@@ -248,6 +256,7 @@ fn mouseWithHit(button_arg: u32, kind_arg: u32, col_arg: u32, row_arg: u32, mods
     };
     s.core.update(.{ .mouse = .{
         .body_hit = hit,
+        .tag_hit = tag_hit,
         .button = button,
         .kind = kind,
         .col = @intCast(@min(col_arg, std.math.maxInt(u16))),
@@ -323,6 +332,45 @@ export fn pardes_cursor_x() i32 {
     return if (s.core.surface.cursor) |cursor| cursor.x else -1;
 }
 
+export fn pardes_tag_layer_limit() u32 {
+    return pardes.MAX_TAG_LAYERS;
+}
+
+export fn pardes_tag_layer_value(index: u32, field: u32) u32 {
+    const s = &(state orelse return 0);
+    if (index >= pardes.MAX_TAG_LAYERS) return 0;
+    const layer = &s.core.surface.tag_layers[index];
+    return switch (field) {
+        0 => layer.cols,
+        1 => @intFromEnum(layer.kind),
+        2 => layer.id,
+        3 => layer.serial,
+        4 => layer.viewport.x,
+        5 => layer.viewport.y,
+        6 => layer.viewport.w,
+        7 => layer.viewport.h,
+        8 => if (layer.cursor) |c| c.col else 65535,
+        9 => if (layer.cursor) |c| @intFromBool(c.bar) else 0,
+        10 => @as(u32, layer.bg[0]) << 16 | @as(u32, layer.bg[1]) << 8 | layer.bg[2],
+        else => 0,
+    };
+}
+
+export fn pardes_tag_layer_cells(index: u32) ?[*]const WebCell {
+    const s = &(state orelse return null);
+    if (index >= pardes.MAX_TAG_LAYERS) return null;
+    const layer = &s.core.surface.tag_layers[index];
+    if (layer.cols == 0) return null;
+    const cells = &s.tag_cells[index];
+    if (cells.len != layer.cells.len) cells.* = gpa.realloc(cells.*, layer.cells.len) catch return null;
+    for (layer.cells, cells.*) |source, *out| out.* = encodeWebCell(source);
+    return cells.ptr;
+}
+
+export fn pardes_tagline_band_offset(row: u16, canvas_h: f32, cell_h: u32, tagline_h: u32) u32 {
+    return pardes.taglineBandOffset(row, canvas_h, cell_h, tagline_h);
+}
+
 export fn pardes_body_layer_value(index: u32, field: u32) u32 {
     const s = &(state orelse return 0);
     if (index >= pardes.MAX_PANES) return 0;