vweb: $html

examples/vweb/vweb_example.v

@@ -27,15 +27,15 @@ pub fn (mut app App) json_endpoint() {
 
 pub fn (mut app App) index() {
 	app.cnt++
-	app.vweb.text('Hello world from vweb')
-	//$vweb.html()
+	//app.vweb.text('Hello world from vweb')
+	$vweb.html()
 }
 
 pub fn (mut app App) reset() {
 }
 
 pub fn (mut app App) text() {
-	app.vweb.text('Hello world')
+	app.vweb.text('Hello world from vweb')
 }
 
 pub fn (mut app App) cookie() {

vlib/v/ast/ast.v

@@ -781,6 +781,8 @@ pub struct ComptimeCall {
 pub:
 	method_name string
 	left        Expr
+	is_vweb     bool
+	vweb_stmts  []Stmt
 pub mut:
 	sym         table.TypeSymbol
 }

vlib/v/gen/cgen.v

@@ -4350,6 +4350,10 @@ fn (mut g Gen) interface_call(typ, interface_type table.Type) {
 }
 
 fn (g &Gen) comptime_call(node ast.ComptimeCall) {
+	if node.is_vweb {
+		g.writeln('vweb__Context_html(&app-> vweb, tmpl_res)')
+		return
+	}
 	g.writeln('// $' + 'method call. sym="$node.sym.name"')
 	mut j := 0
 	for method in node.sym.methods {

vlib/v/parser/comptime.v

@@ -8,6 +8,8 @@ import v.ast
 import v.pref
 import v.vmod
 import v.table
+import vweb.tmpl
+import v.token
 
 const (
 	supported_platforms = ['windows', 'mac', 'macos', 'darwin', 'linux', 'freebsd', 'openbsd',
@@ -76,14 +78,81 @@ fn (mut p Parser) hash() ast.HashStmt {
 	}
 }
 
+struct ParserState {
+	scanner_pos int
+	tok         token.Token
+	prev_tok    token.Token
+	peek_tok    token.Token
+	peek_tok2   token.Token
+	peek_tok3   token.Token
+}
+
+pub fn (p &Parser) save_state() ParserState {
+	return ParserState{
+		scanner_pos: p.scanner.pos
+		tok: p.tok
+		prev_tok: p.prev_tok
+		peek_tok: p.peek_tok
+		peek_tok2: p.peek_tok2
+		peek_tok3: p.peek_tok3
+	}
+}
+
+pub fn (mut p Parser) restore_state(state ParserState) {
+	p.scanner.pos = state.scanner_pos
+	p.tok = state.tok
+	p.prev_tok = state.prev_tok
+	p.peek_tok = state.peek_tok
+	p.peek_tok2 = state.peek_tok2
+	p.peek_tok3 = state.peek_tok3
+}
+
 fn (mut p Parser) vweb() ast.ComptimeCall {
 	p.check(.dollar)
 	p.check(.name) // skip `vweb.html()` TODO
 	p.check(.dot)
+	pos := p.scanner.pos
 	p.check(.name)
 	p.check(.lpar)
 	p.check(.rpar)
-	return ast.ComptimeCall{}
+	state := p.save_state()
+	// Compile vweb html template to V code, parse that V code and embed the resulting V function
+	// that returns an html string.
+	mut path := p.cur_fn_name + '.html'
+	// if p.pref.is_debug {
+	println('>>> compiling vweb HTML template "$path"')
+	v_code := tmpl.compile_file(path)
+	if p.pref.verbose {
+		println('\n\n')
+		println('>>> vweb template for ${path}:')
+		println(v_code)
+		println('>>> end of vweb template END')
+		println('\n\n')
+		p.scanner.text = p.scanner.text[..pos] + v_code + p.scanner.text[pos..]
+		println(p.scanner.text)
+	}
+	// }
+	/*
+	if !os.exists(path) {
+		// Can't find the template file in current directory,
+		// try looking next to the vweb program, in case it's run with
+		// v path/to/vweb_app.v
+		path = os.dir(p.scanner.file_path) + '/' + path
+		if !os.exists(path) {
+			p.error('vweb HTML template "$path" not found')
+		}
+	}
+	*/
+	p.restore_state(state)
+	p.scanner.pos = pos + v_code.len + 1
+	/*
+	println('restored:')
+	println(p.scanner.text[p.scanner.pos..])
+	println('=============')
+	*/
+	return ast.ComptimeCall{
+		is_vweb: true
+	}
 }
 
 fn (mut p Parser) comp_if() ast.Stmt {

vlib/v/parser/fn.v

@@ -265,6 +265,7 @@ fn (mut p Parser) fn_decl() ast.FnDecl {
 		})
 	}
 	// Body
+	p.cur_fn_name = name
 	mut stmts := []ast.Stmt{}
 	no_body := p.tok.kind != .lcbr
 	body_start_pos := p.peek_tok.position()

vlib/v/parser/parser.v

@@ -54,6 +54,7 @@ mut:
 	expecting_type    bool // `is Type`, expecting type
 	errors            []errors.Error
 	warnings          []errors.Warning
+	cur_fn_name       string
 }
 
 // for tests

vlib/vweb/tmpl/tmpl.v

@@ -34,10 +34,11 @@ pub fn compile_template(content string) string {
 	mut s := strings.new_builder(1000)
 	// base := path.all_after_last('/').replace('.html', '')
 	s.writeln("
-mut sb := strings.new_builder(${lines.len * 30})
-header := \' \' // TODO remove
-_ = header
-//footer := \'footer\'
+	// === vweb html template ===
+	mut sb := strings.new_builder(${lines.len * 30})
+	header := \' \' // TODO remove
+	_ = header
+	//footer := \'footer\'
 ")
 	s.writeln(str_start)
 	mut in_css := true // false
@@ -88,6 +89,7 @@ _ = header
 		}
 	}
 	s.writeln(str_end)
-	s.writeln('tmpl_res := sb.str() }')
+	s.writeln('tmpl_res := sb.str() ')
+	s.writeln('// === end of vweb html template ===')
 	return s.str()
 }