169 lines
5.2 KiB
V
169 lines
5.2 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module tmpl
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import os
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import strings
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const (
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str_start = "sb.write_string('"
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str_end = "' ) "
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)
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// compile_file compiles the content of a file by the given path as a template
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pub fn compile_file(path string, fn_name string) string {
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basepath := os.dir(path)
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html := os.read_file(path) or { panic('html failed') }
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return compile_template(basepath, html, fn_name)
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}
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enum State {
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html
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css // <style>
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js // <script>
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// span // span.{
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}
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pub fn compile_template(basepath string, html_ string, fn_name string) string {
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// lines := os.read_lines(path)
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mut html := html_.trim_space()
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mut header := ''
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mut footer := ''
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if os.exists(os.join_path(basepath, 'header.html')) && html.contains('@header') {
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h := os.read_file(os.join_path(basepath, 'header.html')) or {
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panic('reading file ${os.join_path(basepath, 'header.html')} failed')
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}
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header = h.trim_space().replace("'", '"')
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html = header + html
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}
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if os.exists(os.join_path(basepath, 'footer.html')) && html.contains('@footer') {
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f := os.read_file(os.join_path(basepath, 'footer.html')) or {
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panic('reading file ${os.join_path(basepath, 'footer.html')} failed')
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}
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footer = f.trim_space().replace("'", '"')
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html += footer
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}
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mut lines := html.split_into_lines()
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lstartlength := lines.len * 30
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mut s := strings.new_builder(1000)
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// base := path.all_after_last('/').replace('.html', '')
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s.writeln("
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import strings
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// === vweb html template ===
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fn vweb_tmpl_${fn_name}() {
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mut sb := strings.new_builder($lstartlength)\n
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header := \' \' // TODO remove
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_ = header
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footer := \' \' // TODO remove
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_ = footer
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")
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s.write_string(tmpl.str_start)
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mut state := State.html
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mut in_span := false
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// for _line in lines {
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for i := 0; i < lines.len; i++ {
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line := lines[i].trim_space()
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if line == '<style>' {
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state = .css
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} else if line == '</style>' {
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state = .html
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} else if line == '<script>' {
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state = .js
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} else if line == '</script>' {
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state = .html
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}
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if line.contains('@include ') {
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lines.delete(i)
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mut file_name := line.split("'")[1]
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mut file_ext := os.file_ext(file_name)
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if file_ext == '' {
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file_ext = '.html'
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}
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file_name = file_name.replace(file_ext, '')
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// relative path, starting with the current folder
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mut templates_folder := os.real_path(basepath)
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if file_name.contains('/') && file_name.starts_with('/') {
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// an absolute path
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templates_folder = ''
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}
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file_path := os.real_path(os.join_path(templates_folder, '$file_name$file_ext'))
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$if trace_tmpl ? {
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eprintln('>>> basepath: "$basepath" , fn_name: "$fn_name" , @include line: "$line" , file_name: "$file_name" , file_ext: "$file_ext" , templates_folder: "$templates_folder" , file_path: "$file_path"')
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}
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file_content := os.read_file(file_path) or {
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panic('Vweb: reading file $file_name from path: $file_path failed.')
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}
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file_splitted := file_content.split_into_lines().reverse()
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for f in file_splitted {
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lines.insert(i, f)
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}
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i--
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} else if line.contains('@js ') {
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pos := line.index('@js') or { continue }
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s.write_string('<script src="')
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s.write_string(line[pos + 5..line.len - 1])
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s.writeln('"></script>')
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} else if line.contains('@css ') {
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pos := line.index('@css') or { continue }
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s.write_string('<link href="')
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s.write_string(line[pos + 6..line.len - 1])
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s.writeln('" rel="stylesheet" type="text/css">')
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} else if line.contains('@if ') {
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s.writeln(tmpl.str_end)
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pos := line.index('@if') or { continue }
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s.writeln('if ' + line[pos + 4..] + '{')
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s.writeln(tmpl.str_start)
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} else if line.contains('@end') {
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// Remove new line byte
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s.go_back(1)
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s.writeln(tmpl.str_end)
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s.writeln('}')
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s.writeln(tmpl.str_start)
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} else if line.contains('@else') {
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// Remove new line byte
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s.go_back(1)
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s.writeln(tmpl.str_end)
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s.writeln(' } else { ')
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s.writeln(tmpl.str_start)
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} else if line.contains('@for') {
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s.writeln(tmpl.str_end)
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pos := line.index('@for') or { continue }
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s.writeln('for ' + line[pos + 4..] + '{')
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s.writeln(tmpl.str_start)
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} else if state == .html && line.contains('span.') && line.ends_with('{') {
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// `span.header {` => `<span class='header'>`
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class := line.find_between('span.', '{').trim_space()
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s.writeln('<span class="$class">')
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in_span = true
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} else if state == .html && line.contains('.') && line.ends_with('{') {
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// `.header {` => `<div class='header'>`
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class := line.find_between('.', '{').trim_space()
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s.writeln('<div class="$class">')
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} else if state == .html && line.contains('#') && line.ends_with('{') {
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// `#header {` => `<div id='header'>`
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class := line.find_between('#', '{').trim_space()
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s.writeln('<div id="$class">')
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} else if state == .html && line == '}' {
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if in_span {
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s.writeln('</span>')
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in_span = false
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} else {
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s.writeln('</div>')
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}
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} else {
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// HTML, may include `@var`
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// escaped by cgen, unless it's a `vweb.RawHtml` string
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s.writeln(line.replace('@', '$').replace('$$', '@').replace("'", "\\'"))
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}
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}
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s.writeln(tmpl.str_end)
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s.writeln('_tmpl_res_$fn_name := sb.str() ')
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s.writeln('}')
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s.writeln('// === end of vweb html template ===')
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return s.str()
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}
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