frame.go RawHistoryFolder

1package ansi
2
3import (
4	"fmt"
5	"reflect"
6
7	"github.com/bnema/vev-vt/core"
8)
9
10// Frame is an alias for the frontend-neutral terminal grid. ANSI rendering
11// consumes it but does not own its model or storage policy.
12type Frame = core.Frame
13
14// CellSource is the read-only semantic grid consumed by ANSI rendering.
15type CellSource = core.CellSource
16
17var NewFrame = core.NewFrame
18
19func validateCellSource(source CellSource) error {
20	if source == nil {
21		return fmt.Errorf("nil cell source")
22	}
23	value := reflect.ValueOf(source)
24	switch value.Kind() {
25	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Pointer, reflect.Slice:
26		if value.IsNil() {
27			return fmt.Errorf("nil cell source")
28		}
29	}
30	if source.Columns() <= 0 || source.Rows() <= 0 {
31		return fmt.Errorf("invalid cell source size %dx%d", source.Columns(), source.Rows())
32	}
33	switch frame := source.(type) {
34	case Frame:
35		return frame.Validate()
36	case *Frame:
37		return frame.Validate()
38	}
39	return nil
40}
41
42func cloneCellSource(source CellSource) Frame {
43	switch frame := source.(type) {
44	case Frame:
45		return frame.Clone()
46	case *Frame:
47		return frame.Clone()
48	}
49	clone := NewFrame(source.Columns(), source.Rows())
50	for y := range source.Rows() {
51		for x := range source.Columns() {
52			clone.Set(x, y, source.Cell(x, y))
53		}
54	}
55	return clone
56}