terminal: resize cols without reflow handles higher caps

src/terminal/PageList.zig

@@ -581,7 +581,7 @@ fn resizeCols(
                 if (row.wrap) break :no_reflow;
             }
 
-            try self.resizeWithoutReflowGrowCols(cap, chunk);
+            try self.resizeWithoutReflowGrowCols(cols, chunk);
             continue;
         }
 
@@ -1245,11 +1245,9 @@ fn resizeWithoutReflow(self: *PageList, opts: Resize) !void {
             // pages may not have the capacity for this. If they don't have
             // the capacity we need to allocate a new page and copy the data.
             .gt => {
-                const cap = try std_capacity.adjust(.{ .cols = cols });
-
                 var it = self.pageIterator(.right_down, .{ .screen = .{} }, null);
                 while (it.next()) |chunk| {
-                    try self.resizeWithoutReflowGrowCols(cap, chunk);
+                    try self.resizeWithoutReflowGrowCols(cols, chunk);
                 }
 
                 self.cols = cols;
@@ -1260,11 +1258,12 @@ fn resizeWithoutReflow(self: *PageList, opts: Resize) !void {
 
 fn resizeWithoutReflowGrowCols(
     self: *PageList,
-    cap: Capacity,
+    cols: size.CellCountInt,
     chunk: PageIterator.Chunk,
 ) !void {
-    assert(cap.cols > self.cols);
+    assert(cols > self.cols);
     const page = &chunk.page.data;
+    const cap = try page.capacity.adjust(.{ .cols = cols });
 
     // Update our col count
     const old_cols = self.cols;

src/terminal/Terminal.zig

@@ -7708,6 +7708,26 @@ test "Terminal: resize with wraparound on" {
     try testing.expectEqualStrings("01\n23", str);
 }
 
+test "Terminal: resize with high unique style per cell" {
+    const alloc = testing.allocator;
+    var t = try init(alloc, 30, 30);
+    defer t.deinit(alloc);
+
+    for (0..t.rows) |y| {
+        for (0..t.cols) |x| {
+            t.setCursorPos(y, x);
+            try t.setAttribute(.{ .direct_color_bg = .{
+                .r = @intCast(x),
+                .g = @intCast(y),
+                .b = 0,
+            } });
+            try t.print('x');
+        }
+    }
+
+    try t.resize(alloc, 60, 30);
+}
+
 test "Terminal: DECCOLM without DEC mode 40" {
     const alloc = testing.allocator;
     var t = try init(alloc, 5, 5);