grindlemire/go-tui code browser

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585

package tuigen

import (
	"fmt"
	"strconv"
	"strings"
)

// generateElement generates code for an element and returns the variable name.
// If parentVar is non-empty, adds this element as a child.
func (g *Generator) generateElement(elem *Element, parentVar string) string {
	return g.generateElementWithRefs(elem, parentVar, false, false, false)
}

// isComponentElement returns true if the tag represents a Component that
// must be mounted via app.Mount() rather than constructed with tui.New().
func isComponentElement(tag string) bool {
	return tag == "textarea" || tag == "input" || tag == "modal" || tag == "markdown"
}

// generateElementWithRefs generates code for an element with ref handling.
// inLoop and inConditional track the context for proper variable handling.
func (g *Generator) generateElementWithRefs(elem *Element, parentVar string, inLoop bool, inConditional bool, inForLoop bool) string {
	if isComponentElement(elem.Tag) {
		return g.generateComponentElementWithRefs(elem, parentVar, inLoop)
	}

	// All elements use auto-generated variable names now
	varName := g.nextVar()

	// Build options from attributes and tag
	elemOpts := g.buildElementOptions(elem)

	if len(elemOpts.options) == 0 {
		g.writef("%s := tui.New()\n", varName)
	} else {
		g.writef("%s := tui.New(\n", varName)
		g.indent++
		for _, opt := range elemOpts.options {
			g.writef("%s,\n", opt)
		}
		g.indent--
		g.writeln(")")
	}

	// Handle ref binding — emit the appropriate Set/Append/Put call
	if elem.RefExpr != nil {
		refName := elem.RefExpr.Code
		if elem.RefKey != nil {
			// Map-based ref: put with key
			g.writef("%s.Put(%s, %s)\n", refName, elem.RefKey.Code, varName)
		} else if inLoop {
			// List-based ref: append
			g.writef("%s.Append(%s)\n", refName, varName)
		} else {
			// Single ref: set
			g.writef("%s.Set(%s)\n", refName, varName)
		}
	}

	// Generate children - skip if text element already has content in WithText
	if !skipTextChildren(elem) {
		g.generateChildrenWithRefs(varName, elem.Children, inLoop, inConditional, inForLoop)
	}

	// Add to parent if specified
	if parentVar != "" {
		g.writef("%s.AddChild(%s)\n", parentVar, varName)
	}

	return varName
}

// elementOptions holds options for an element.
type elementOptions struct {
	options []string
}

// buildElementOptions generates option expressions for an element.
// Returns both element options and any watcher expressions found.
func (g *Generator) buildElementOptions(elem *Element) elementOptions {
	var result elementOptions

	// Handle tag-specific options
	switch elem.Tag {
	case "hr":
		result.options = append(result.options, "tui.WithHR()")
	case "br":
		result.options = append(result.options, "tui.WithWidth(0)")
		result.options = append(result.options, "tui.WithHeight(1)")
	case "span", "p":
		// If text element has children that are text content, add WithText
		textContent := g.extractTextContent(elem.Children)
		if textContent != "" {
			result.options = append(result.options, fmt.Sprintf("tui.WithText(%s)", textContent))
		}
	case "table":
		result.options = append(result.options, `tui.WithTag("table")`)
		result.options = append(result.options, "tui.WithDisplay(tui.DisplayFlex)")
		result.options = append(result.options, "tui.WithDirection(tui.Column)")
	case "tr":
		result.options = append(result.options, `tui.WithTag("tr")`)
		result.options = append(result.options, "tui.WithDisplay(tui.DisplayFlex)")
		result.options = append(result.options, "tui.WithDirection(tui.Row)")
	case "td":
		result.options = append(result.options, `tui.WithTag("td")`)
		textContent := g.extractTextContent(elem.Children)
		if textContent != "" {
			result.options = append(result.options, fmt.Sprintf("tui.WithText(%s)", textContent))
		}
	case "th":
		result.options = append(result.options, `tui.WithTag("th")`)
		textContent := g.extractTextContent(elem.Children)
		if textContent != "" {
			result.options = append(result.options, fmt.Sprintf("tui.WithText(%s)", textContent))
		}
	}

	// Track text style methods from class attribute separately
	var classTextMethods []string

	// Generate options from attributes
	for _, attr := range elem.Attributes {
		// Handle class attribute specially - parse Tailwind classes
		if attr.Name == "class" {
			classValue := g.getClassAttributeValue(attr)
			if classValue != "" {
				twResult := ParseTailwindClasses(classValue)
				// Add direct options
				result.options = append(result.options, twResult.Options...)
				// Collect text style methods for combining later
				classTextMethods = append(classTextMethods, twResult.TextMethods...)
			}
			continue
		}

		// Handle handler attributes — emit as inline With* options (self-inject)
		if optionFunc, isHandler := handlerAttributes[attr.Name]; isHandler {
			handlerExpr := g.generateAttributeValue(attr.Value)
			if handlerExpr != "" {
				result.options = append(result.options, fmt.Sprintf("%s(%s)", optionFunc, handlerExpr))
			}
			continue
		}

		opt := g.generateAttributeOption(attr)
		if opt != "" {
			result.options = append(result.options, opt)
		}
	}

	// Build combined text style from class attribute if any
	if len(classTextMethods) > 0 {
		textStyleOpt := BuildTextStyleOption(classTextMethods)
		if textStyleOpt != "" {
			result.options = append(result.options, textStyleOpt)
		}
	}

	return result
}

// getClassAttributeValue extracts the string value from a class attribute.
func (g *Generator) getClassAttributeValue(attr *Attribute) string {
	switch v := attr.Value.(type) {
	case *StringLit:
		return v.Value
	default:
		// class attribute only supports string literals for now
		return ""
	}
}

// extractTextContent extracts text from element children for WithText.
// Returns empty string if children contain non-text content.
func (g *Generator) extractTextContent(children []Node) string {
	if len(children) == 0 {
		return ""
	}

	// If single GoExpr child, return the expression (wrapping numerics)
	if len(children) == 1 {
		if expr, ok := children[0].(*GoExpr); ok {
			return textExpr(expr.Code)
		}
		if text, ok := children[0].(*TextContent); ok {
			return strconv.Quote(text.Text)
		}
	}

	// Multiple children or complex content - handled separately in generateChildren
	return ""
}

// textExpr wraps a Go expression in fmt.Sprint() if it looks like a numeric literal.
// This ensures numeric values are converted to strings for tui.WithText().
// Detects: 42, 3.14, 0xFF, 0b1010, 0o755, -1, .5
func textExpr(code string) string {
	s := strings.TrimSpace(code)
	if s == "" {
		return code
	}
	// Strip optional leading minus
	check := s
	if len(check) > 0 && check[0] == '-' {
		check = check[1:]
	}
	if len(check) == 0 {
		return code
	}
	// If first char is a digit or '.', it's a numeric literal
	if (check[0] >= '0' && check[0] <= '9') || check[0] == '.' {
		return fmt.Sprintf("fmt.Sprint(%s)", s)
	}
	return code
}

// handlerAttributes maps focus callback attribute names to their With* option functions.
// Handlers are emitted as inline options during element creation (self-inject pattern).
var handlerAttributes = map[string]string{
	"onFocus":    "tui.WithOnFocus",
	"onBlur":     "tui.WithOnBlur",
	"onActivate": "tui.WithOnActivate",
}

// attributeToOption maps DSL attribute names to tui.With* functions.
var attributeToOption = map[string]string{
	// Dimensions
	"width":         "tui.WithWidth(%s)",
	"widthPercent":  "tui.WithWidthPercent(%s)",
	"height":        "tui.WithHeight(%s)",
	"heightPercent": "tui.WithHeightPercent(%s)",
	"minWidth":      "tui.WithMinWidth(%s)",
	"minHeight":     "tui.WithMinHeight(%s)",
	"maxWidth":      "tui.WithMaxWidth(%s)",
	"maxHeight":     "tui.WithMaxHeight(%s)",

	// Flex container
	"direction":    "tui.WithDirection(%s)",
	"justify":      "tui.WithJustify(%s)",
	"align":        "tui.WithAlign(%s)",
	"gap":          "tui.WithGap(%s)",
	"flexWrap":     "tui.WithFlexWrap(%s)",
	"alignContent": "tui.WithAlignContent(%s)",

	// Flex item
	"flexGrow":   "tui.WithFlexGrow(%s)",
	"flexShrink": "tui.WithFlexShrink(%s)",
	"alignSelf":  "tui.WithAlignSelf(%s)",

	// Spacing
	"padding": "tui.WithPadding(%s)",
	"margin":  "tui.WithMargin(%s)",

	// Visual
	"border":             "tui.WithBorder(%s)",
	"borderStyle":        "tui.WithBorderStyle(%s)",
	"borderTitle":        "tui.WithBorderTitle(%s)",
	"background":         "tui.WithBackground(%s)",
	"backgroundGradient": "tui.WithBackgroundGradient(%s)",

	// Text
	"text":      "tui.WithText(%s)",
	"textStyle": "tui.WithTextStyle(%s)",
	"textAlign": "tui.WithTextAlign(%s)",

	// Focus (non-handler attributes only)
	"focusable": "tui.WithFocusable(%s)",
	"autoFocus": "tui.WithAutoFocus(%s)",

	// Scroll
	"scrollable":    "tui.WithScrollable(%s)",
	"scrollOffset":  "tui.WithScrollOffset(%s)",
	"hideScrollbar": "tui.WithScrollbarHidden(%s)",
}

// generateAttributeOption generates an option expression from an attribute.
func (g *Generator) generateAttributeOption(attr *Attribute) string {
	// Handle width="100%" and height="100%" percentage string syntax
	if attr.Name == "width" || attr.Name == "height" {
		if strLit, ok := attr.Value.(*StringLit); ok && strings.HasSuffix(strLit.Value, "%") {
			numStr := strings.TrimSuffix(strLit.Value, "%")
			if attr.Name == "width" {
				return fmt.Sprintf("tui.WithWidthPercent(%s)", numStr)
			}
			return fmt.Sprintf("tui.WithHeightPercent(%s)", numStr)
		}
	}

	template, ok := attributeToOption[attr.Name]
	if !ok {
		// Unknown attribute - skip with no error (analyzer should catch this)
		return ""
	}

	value := g.generateAttributeValue(attr.Value)
	return fmt.Sprintf(template, value)
}

// generateAttributeValue generates a Go expression from an attribute value.
func (g *Generator) generateAttributeValue(value Node) string {
	switch v := value.(type) {
	case *StringLit:
		return strconv.Quote(v.Value)
	case *IntLit:
		return strconv.FormatInt(v.Value, 10)
	case *FloatLit:
		return strconv.FormatFloat(v.Value, 'f', -1, 64)
	case *BoolLit:
		if v.Value {
			return "true"
		}
		return "false"
	case *GoExpr:
		return v.Code
	case *RawGoExpr:
		return v.Code
	default:
		return ""
	}
}

// skipTextChildren returns true if text element children should not be
// processed as AddChild calls (they're already in WithText).
func skipTextChildren(elem *Element) bool {
	switch elem.Tag {
	case "span", "p", "td", "th":
		// text elements
	default:
		return false
	}
	// Only skip if there's a single text/expr child that was used for WithText
	if len(elem.Children) != 1 {
		return false
	}
	switch elem.Children[0].(type) {
	case *TextContent, *GoExpr:
		return true
	}
	return false
}

// textareaAttributeToOption maps textarea-specific attributes to tui.WithTextArea* options.
var textareaAttributeToOption = map[string]string{
	"width":            "tui.WithTextAreaWidth(%s)",
	"maxHeight":        "tui.WithTextAreaMaxHeight(%s)",
	"border":           "tui.WithTextAreaBorder(%s)",
	"textStyle":        "tui.WithTextAreaTextStyle(%s)",
	"value":            "tui.WithTextAreaValue(%s)",
	"placeholder":      "tui.WithTextAreaPlaceholder(%s)",
	"placeholderStyle": "tui.WithTextAreaPlaceholderStyle(%s)",
	"cursor":           "tui.WithTextAreaCursor(%s)",
	"focusColor":       "tui.WithTextAreaFocusColor(%s)",
	"borderGradient":   "tui.WithTextAreaBorderGradient(%s)",
	"focusGradient":    "tui.WithTextAreaFocusGradient(%s)",
	"submitKey":        "tui.WithTextAreaSubmitKey(%s)",
	"autoFocus":        "tui.WithTextAreaAutoFocus(%s)",
}

// textareaHandlerAttributes maps textarea event attributes to handler option funcs.
var textareaHandlerAttributes = map[string]string{
	"onSubmit": "tui.WithTextAreaOnSubmit",
}

// inputAttributeToOption maps input-specific attributes to tui.WithInput* options.
var inputAttributeToOption = map[string]string{
	"width":            "tui.WithInputWidth(%s)",
	"border":           "tui.WithInputBorder(%s)",
	"textStyle":        "tui.WithInputTextStyle(%s)",
	"value":            "tui.WithInputValue(%s)",
	"placeholder":      "tui.WithInputPlaceholder(%s)",
	"placeholderStyle": "tui.WithInputPlaceholderStyle(%s)",
	"cursor":           "tui.WithInputCursor(%s)",
	"focusColor":       "tui.WithInputFocusColor(%s)",
	"borderGradient":   "tui.WithInputBorderGradient(%s)",
	"focusGradient":    "tui.WithInputFocusGradient(%s)",
	"autoFocus":        "tui.WithInputAutoFocus(%s)",
}

// inputHandlerAttributes maps input event attributes to handler option funcs.
var inputHandlerAttributes = map[string]string{
	"onSubmit": "tui.WithInputOnSubmit",
	"onChange": "tui.WithInputOnChange",
}

// modalAttributeToOption maps modal-specific attributes to tui.WithModal* options.
var modalAttributeToOption = map[string]string{
	"open":                 "tui.WithModalOpen(%s)",
	"backdrop":             "tui.WithModalBackdrop(%s)",
	"closeOnEscape":        "tui.WithModalCloseOnEscape(%s)",
	"closeOnBackdropClick": "tui.WithModalCloseOnBackdropClick(%s)",
	"trapFocus":            "tui.WithModalTrapFocus(%s)",
	"keyMap":               "tui.WithModalKeyMap(%s)",
}

// modalHandlerAttributes maps modal event attributes to handler option funcs.
var modalHandlerAttributes = map[string]string{}

// markdownAttributeToOption maps markdown-specific attributes to tui.WithMarkdown* options.
// source and state are distinct because the generator cannot type-discriminate a
// single expression attribute: source={stringExpr}, state={*State[string] expr}.
var markdownAttributeToOption = map[string]string{
	"source": "tui.WithMarkdownSource(%s)",
	"state":  "tui.WithMarkdownState(%s)",
	"width":  "tui.WithMarkdownWidth(%s)",
	"theme":  "tui.WithMarkdownTheme(%s)",
}

// markdownHandlerAttributes: markdown has no event handlers.
var markdownHandlerAttributes = map[string]string{}

// componentConstructor returns the tui.New* constructor for a component element tag.
func componentConstructor(tag string) string {
	switch tag {
	case "textarea":
		return "tui.NewTextArea"
	case "input":
		return "tui.NewInput"
	case "modal":
		return "tui.NewModal"
	case "markdown":
		return "tui.NewMarkdown"
	default:
		// Produce an identifier that won't compile, surfacing the mistake immediately.
		return fmt.Sprintf("UNKNOWN_COMPONENT_%s", tag)
	}
}

// generateComponentElementWithRefs generates an app.Mount() call for elements
// that are backed by Component types (e.g., <textarea> → tui.NewTextArea).
func (g *Generator) generateComponentElementWithRefs(elem *Element, parentVar string, inLoop bool) string {
	varName := g.nextVar()
	baseIndex := g.mountIndex
	g.mountIndex++

	indexExpr := g.loopIndexExpr(baseIndex)
	if indexExpr == "" {
		indexExpr = fmt.Sprintf("%d", baseIndex)
	}

	// Build component-specific options from attributes
	elemOpts := g.buildComponentElementOptions(elem)

	// For modal, also collect class-derived element options
	if elem.Tag == "modal" {
		classOpts := g.buildModalClassOptions(elem)
		if len(classOpts) > 0 {
			inner := strings.Join(classOpts, ", ")
			elemOpts.options = append(elemOpts.options, fmt.Sprintf("tui.WithModalElementOptions(%s)", inner))
		}
	}

	g.writef("%s := app.MountPersistent(%s, %s, func() tui.Component {\n", varName, g.currentReceiver, indexExpr)
	g.indent++

	constructor := componentConstructor(elem.Tag)

	if len(elemOpts.options) == 0 {
		g.writef("return %s()\n", constructor)
	} else {
		g.writef("return %s(\n", constructor)
		g.indent++
		for _, opt := range elemOpts.options {
			g.writef("%s,\n", opt)
		}
		g.indent--
		g.writef(")\n")
	}

	g.indent--
	g.writeln("})")

	// Handle ref binding
	if elem.RefExpr != nil {
		refName := elem.RefExpr.Code
		if elem.RefKey != nil {
			g.writef("%s.Put(%s, %s)\n", refName, elem.RefKey.Code, varName)
		} else if inLoop {
			g.writef("%s.Append(%s)\n", refName, varName)
		} else {
			g.writef("%s.Set(%s)\n", refName, varName)
		}
	}

	// Generate children for component elements that accept them (modal)
	if len(elem.Children) > 0 {
		g.generateChildrenWithRefs(varName, elem.Children, inLoop, false, false)
	}

	if parentVar != "" {
		g.writef("%s.AddChild(%s)\n", parentVar, varName)
	}

	return varName
}

// buildComponentElementOptions generates option expressions for a component element (e.g., textarea, input).
func (g *Generator) buildComponentElementOptions(elem *Element) elementOptions {
	var result elementOptions

	// Select the correct attribute maps based on tag
	attrMap, handlerMap := componentAttributeMaps(elem.Tag)

	for _, attr := range elem.Attributes {
		// Skip generic attributes handled elsewhere
		if attr.Name == "class" || attr.Name == "id" || attr.Name == "ref" ||
			attr.Name == "key" || attr.Name == "deps" {
			continue
		}

		// Check handler attributes first
		if optionFunc, isHandler := handlerMap[attr.Name]; isHandler {
			handlerExpr := g.generateAttributeValue(attr.Value)
			if handlerExpr != "" {
				result.options = append(result.options, fmt.Sprintf("%s(%s)", optionFunc, handlerExpr))
			}
			continue
		}

		// Check component-specific attribute map
		if template, ok := attrMap[attr.Name]; ok {
			value := g.generateAttributeValue(attr.Value)
			if value != "" {
				// value attribute expects *State[string]; wrap string literals
				if attr.Name == "value" {
					if _, isStr := attr.Value.(*StringLit); isStr {
						value = fmt.Sprintf("tui.NewState(%s)", value)
					}
				}
				// open attribute expects *State[bool]; wrap bool literals
				if attr.Name == "open" && elem.Tag == "modal" {
					if _, isBool := attr.Value.(*BoolLit); isBool {
						value = fmt.Sprintf("tui.NewState(%s)", value)
					}
				}
				result.options = append(result.options, fmt.Sprintf(template, value))
			}
			continue
		}
	}

	return result
}

// buildModalClassOptions extracts element options from the class attribute
// for a modal element. These get wrapped in WithModalElementOptions.
func (g *Generator) buildModalClassOptions(elem *Element) []string {
	var opts []string
	for _, attr := range elem.Attributes {
		if attr.Name != "class" {
			continue
		}
		classValue := g.getClassAttributeValue(attr)
		if classValue == "" {
			continue
		}
		twResult := ParseTailwindClasses(classValue)
		opts = append(opts, twResult.Options...)
		if len(twResult.TextMethods) > 0 {
			textStyleOpt := BuildTextStyleOption(twResult.TextMethods)
			if textStyleOpt != "" {
				opts = append(opts, textStyleOpt)
			}
		}
	}
	return opts
}

// componentAttributeMaps returns the attribute and handler maps for a component element tag.
func componentAttributeMaps(tag string) (attrMap map[string]string, handlerMap map[string]string) {
	switch tag {
	case "input":
		return inputAttributeToOption, inputHandlerAttributes
	case "textarea":
		return textareaAttributeToOption, textareaHandlerAttributes
	case "modal":
		return modalAttributeToOption, modalHandlerAttributes
	case "markdown":
		return markdownAttributeToOption, markdownHandlerAttributes
	default:
		// Unknown tags won't have any attribute mappings; componentConstructor
		// will produce a compile error in the generated code.
		return nil, nil
	}
}