Created
August 20, 2024 06:17
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html builder idea
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| package html_builder | |
| import "core:fmt" | |
| import "core:strings" | |
| Attr :: struct { | |
| name: string, | |
| value: string, | |
| } | |
| Block :: struct { | |
| type: string, | |
| attrs: [dynamic]Attr, | |
| children: [dynamic]Block, | |
| text: string, // if children is nil | |
| } | |
| to_html :: proc(sb: ^strings.Builder, block: ^Block, level: int = 0) { | |
| print_indent :: proc(sb: ^strings.Builder, level: int) { | |
| for _ in 0..<level { | |
| fmt.sbprint(sb, " ") | |
| } | |
| } | |
| if block.type != "" { | |
| print_indent(sb, level) | |
| fmt.sbprintf(sb, "<%s", block.type) | |
| for &attr in block.attrs { | |
| // TODO: escape `"` characters in attr.value to `"` | |
| fmt.sbprintf(sb, " %s=\"%s\"", attr.name, attr.value) | |
| } | |
| fmt.sbprintf(sb, ">\n") | |
| } | |
| if len(block.children) > 0 { | |
| for &block in block.children { | |
| to_html(sb, &block, level + 1) | |
| } | |
| } else if block.text != "" { | |
| print_indent(sb, level+1) | |
| fmt.sbprint(sb, block.text) | |
| fmt.sbprintln(sb) | |
| } | |
| if block.type != "" { | |
| print_indent(sb, level) | |
| fmt.sbprintf(sb, "</%s>\n", block.type) | |
| } | |
| } | |
| // blocks builder | |
| current: ^Block | |
| begin :: proc(type: string) { | |
| current = new(Block) | |
| current.type = type | |
| } | |
| end :: proc() -> ^Block { | |
| defer current = nil | |
| return current | |
| } | |
| attr :: proc(name: string, value: string) { | |
| append(¤t.attrs, Attr{name, value}) | |
| } | |
| text :: proc(t: string) { | |
| current.text = t | |
| } | |
| @(deferred_out=_el_end) | |
| el :: proc(type: string) -> (prev: ^Block) { | |
| block := Block { type = type } | |
| idx := len(current.children) | |
| append(¤t.children, block) | |
| prev = current | |
| current = ¤t.children[idx] | |
| return prev | |
| } | |
| _el_end :: proc(prev: ^Block) { | |
| current = prev | |
| } | |
| main :: proc() { | |
| begin("html") | |
| { | |
| el("head") | |
| { | |
| el("title") | |
| text("Test Document") | |
| } | |
| } | |
| { | |
| el("body") | |
| { | |
| el("div") | |
| attr("class", "abc def") | |
| { | |
| el("p") | |
| text("Hello World!") | |
| } | |
| } | |
| } | |
| doc := end() | |
| sb: strings.Builder | |
| to_html(&sb, doc) | |
| fmt.println(strings.to_string(sb)) | |
| } |
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