show all 256 icons in showcase; fix input cursor on external text clear

- icons demo: display full icon catalog in 5-col grid with x-large size
- category click clears search query
- clamp cursor_pos to text length in insert/delete/render_cursor
- render cursor at pos 0 when placeholder active

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mike-ward

examples/showcase.v

@@ -636,6 +636,7 @@ fn group_picker_item(label string, key string, app &ShowcaseApp) gui.View {
 			mut app := w.state[ShowcaseApp]()
 			app.selected_group = key
 			app.show_docs = false
+			app.nav_query = ''
 			if key == 'data' {
 				entries := filtered_entries(app)
 				app.selected_component = preferred_component_for_group(key, entries)
@@ -4087,13 +4088,37 @@ Use `gui.icons_map` for programmatic access to all icon names.
 Icons require `gui.theme().icon*` text styles for correct sizing.'
 
 fn demo_icons() gui.View {
-	return gui.row(
-		content: [
-			gui.text(text: gui.icon_github_alt, text_style: gui.theme().icon2),
-			gui.text(text: gui.icon_twitter, text_style: gui.theme().icon2),
-			gui.text(text: gui.icon_bug, text_style: gui.theme().icon2),
-			gui.text(text: gui.icon_heart, text_style: gui.theme().icon2),
-		]
+	keys := gui.icons_map.keys()
+	mut rows := []gui.View{}
+	for i := 0; i < keys.len; i += 5 {
+		mut icons := []gui.View{}
+		end := if i + 5 < keys.len { i + 5 } else { keys.len }
+		for j := i; j < end; j++ {
+			key := keys[j]
+			icons << gui.column(
+				min_width: 100
+				h_align:   .center
+				padding:   gui.padding_small
+				content:   [
+					gui.text(
+						text:       gui.icons_map[key]
+						text_style: gui.theme().icon1
+					),
+					gui.text(
+						text:       key.replace('icon_', '')
+						text_style: gui.theme().n5
+					),
+				]
+			)
+		}
+		rows << gui.row(
+			spacing: 0
+			content: icons
+		)
+	}
+	return gui.column(
+		spacing: gui.spacing_small
+		content: rows
 	)
 }
 

render.v

@@ -1268,7 +1268,11 @@ fn render_cursor(shape &Shape, clip DrawClip, mut window Window) {
 	if window.is_focus(shape.id_focus) && shape.shape_type == .text
 		&& window.view_state.input_cursor_on {
 		input_state := window.view_state.input_state.get(shape.id_focus) or { InputState{} }
-		cursor_pos := input_state.cursor_pos
+		cursor_pos := if shape.tc.text_is_placeholder {
+			0
+		} else {
+			int_min(input_state.cursor_pos, shape.tc.text.runes().len)
+		}
 
 		if cursor_pos >= 0 {
 			byte_idx := rune_to_byte_index(shape.tc.text, cursor_pos)

view_input.v

@@ -354,7 +354,7 @@ fn (cfg &InputCfg) delete(mut w Window, is_delete bool) ?string {
 	}
 	mut text := cfg.text.runes()
 	input_state := w.view_state.input_state.get(cfg.id_focus) or { InputState{} }
-	mut cursor_pos := input_state.cursor_pos
+	mut cursor_pos := int_min(input_state.cursor_pos, text.len)
 	if cursor_pos < 0 {
 		cursor_pos = text.len
 	}
@@ -373,10 +373,6 @@ fn (cfg &InputCfg) delete(mut w Window, is_delete bool) ?string {
 		if cursor_pos == text.len && is_delete {
 			return text.string()
 		}
-		if cursor_pos > text.len {
-			log.error('cursor_pos out of range (delete)')
-			return none
-		}
 		delete_pos := if is_delete { cursor_pos } else { cursor_pos - 1 }
 		if delete_pos < 0 || delete_pos >= text.len {
 			return none
@@ -416,7 +412,7 @@ fn (cfg &InputCfg) insert(s string, mut w Window) !string {
 	}
 	mut text := cfg.text.runes()
 	input_state := w.view_state.input_state.get(cfg.id_focus) or { InputState{} }
-	mut cursor_pos := input_state.cursor_pos
+	mut cursor_pos := int_min(input_state.cursor_pos, text.len)
 	if cursor_pos < 0 {
 		text = arrays.append(cfg.text.runes(), insert_runes)
 		cursor_pos = text.len
@@ -428,9 +424,6 @@ fn (cfg &InputCfg) insert(s string, mut w Window) !string {
 		text = arrays.append(arrays.append(text[..beg], insert_runes), text[end..])
 		cursor_pos = int_min(int(beg) + insert_runes.len, text.len)
 	} else {
-		if cursor_pos > text.len {
-			return error('cursor_pos out of range (insert)')
-		}
 		text = arrays.append(arrays.append(text[..cursor_pos], insert_runes), text[cursor_pos..])
 		cursor_pos = int_min(cursor_pos + insert_runes.len, text.len)
 	}