terminal: hasText no longer special cases kitty placeholders

src/font/shaper/run.zig

@@ -228,6 +228,12 @@ pub const RunIterator = struct {
                 continue;
             }
 
+            // If we're a Kitty unicode placeholder then we add a blank.
+            if (cell.codepoint() == terminal.kitty.graphics.unicode.placeholder) {
+                try self.addCodepoint(&hasher, ' ', @intCast(cluster));
+                continue;
+            }
+
             // Add all the codepoints for our grapheme
             try self.addCodepoint(
                 &hasher,
@@ -284,8 +290,20 @@ pub const RunIterator = struct {
         style: font.Style,
         presentation: ?font.Presentation,
     ) !?font.Collection.Index {
+        if (cell.isEmpty() or
+            cell.codepoint() == 0 or
+            cell.codepoint() == terminal.kitty.graphics.unicode.placeholder)
+        {
+            return try self.grid.getIndex(
+                alloc,
+                ' ',
+                style,
+                presentation,
+            );
+        }
+
         // Get the font index for the primary codepoint.
-        const primary_cp: u32 = if (cell.isEmpty() or cell.codepoint() == 0) ' ' else cell.codepoint();
+        const primary_cp: u32 = cell.codepoint();
         const primary = try self.grid.getIndex(
             alloc,
             primary_cp,

src/terminal/page.zig

@@ -1705,8 +1705,7 @@ pub const Cell = packed struct(u64) {
         return switch (self.content_tag) {
             .codepoint,
             .codepoint_grapheme,
-            => self.content.codepoint != 0 and
+            => self.content.codepoint != 0,
-                self.content.codepoint != kitty.graphics.unicode.placeholder,
 
             .bg_color_palette,
             .bg_color_rgb,
@@ -1738,8 +1737,7 @@ pub const Cell = packed struct(u64) {
         return self.style_id != style.default_id;
     }
 
-    /// Returns true if the cell has no text or styling. This also returns
+    /// Returns true if the cell has no text or styling.
-    /// true if the cell represents a Kitty graphics unicode placeholder.
     pub fn isEmpty(self: Cell) bool {
         return switch (self.content_tag) {
             // Textual cells are empty if they have no text and are narrow.
@@ -2671,12 +2669,3 @@ test "Page verifyIntegrity zero cols" {
         page.verifyIntegrity(testing.allocator),
     );
 }
-
-test "Cell isEmpty for kitty placeholder" {
-    var c: Cell = .{
-        .content_tag = .codepoint_grapheme,
-        .content = .{ .codepoint = kitty.graphics.unicode.placeholder },
-    };
-    try testing.expectEqual(@as(u21, kitty.graphics.unicode.placeholder), c.codepoint());
-    try testing.expect(c.isEmpty());
-}