# Render the page as a html string
fun render: String do
+ root.children.clear
open("head")
head
close("head")
class HTMLTag
# HTML tagname: 'div' for <div></div>
var tag: String
- init(tag: String) do self.tag = tag
+ init(tag: String) do
+ self.tag = tag
+ self.is_void = (once ["area", "base", "br", "col", "command", "embed", "hr", "img", "input", "keygen", "link", "meta", "param", "source", "track", "wbr"]).has(tag)
+ end
+
+ # Is the HTML element a void element?
+ var is_void: Bool
init with_attrs(tag: String, attrs: Map[String, String]) do
self.tag = tag
classes.add(klass)
return self
end
- private var classes: Set[String] = new HashSet[String]
+ var classes: Set[String] = new HashSet[String]
+
+ # Add multiple CSS classes
+ fun add_classes(classes: Collection[String]): HTMLTag do
+ self.classes.add_all(classes)
+ return self
+ end
# Set a CSS 'value' for 'prop'
# var img = new HTMLTag("img")
# List of children HTML elements
var children: Set[HTMLTag] = new HashSet[HTMLTag]
- # Set text of element
- # var p = new HTMLTag("p")
- # p.text("Hello World!")
- # Text is escaped see: standard::String::html_escape
+ # Clear all child and set the text of element
+ # var p = new HTMLTag("p")
+ # p.text("Hello World!")
+ # assert p.html == "<p>Hello World!</p>"
+ # Text is escaped see: `standard::String::html_escape`
fun text(txt: String): HTMLTag do
- content = txt
+
+ children.clear
+ append(txt)
return self
end
- private var content: String = ""
# Append text to element
- # var p = new HTMLTag("p")
- # p.append("Hello").append("<br/>").append("World!")
+ # var p = new HTMLTag("p")
+ # p.append("Hello")
+ # p.add(new HTMLTag("br"))
+ # p.append("World!")
+ # assert p.html == "<p>Hello<br/>World!</p>"
# Text is escaped see: standard::String::html_escape
fun append(txt: String): HTMLTag do
- text("{content}{txt}")
+ add(new HTMLRaw(txt.html_escape))
+ return self
+ end
+
+ # Append raw HTML to element
+ # var p = new HTMLTag("p")
+ # p.append("Hello")
+ # p.add_raw_html("<bla/>")
+ # p.html #- "<p>Hello<bla/></p>"
+ # Note: the HTML in insered as it, no verification is done
+ fun add_raw_html(txt: String): HTMLTag do
+ add(new HTMLRaw(txt))
return self
end
# Render the element as HTML string
fun html: String do
- var content = render_content
- if tag != "script" and content.is_empty then return "<{tag}{render_attrs}/>"
- return "<{tag}{render_attrs}>{content}</{tag}>"
+ var res = new Array[String]
+ render_in(res)
+ return res.to_s
end
- private fun render_attrs: String do
- var str = "{render_classes}{render_css}"
- for key, value in attrs do
- if key == "class" or key == "style" then continue
- str = "{str} {key}='{value}'"
+ # Save html page in the specified file
+ fun save(file: String) do
+ var out = new OFStream.open(file)
+ var res = new Array[String]
+ render_in(res)
+ for r in res do
+ out.write(r)
end
- return str
+ out.close
end
- private fun render_css: String do
- var css = ""
- if attrs.has_key("style") then css = attrs["style"]
- for key, value in self.css_props do
- css = "{css}; {key}: {value}"
+ # In order to avoid recursive concatenation,
+ # this function collects in `res` all the small fragments of `String`
+ private fun render_in(res: Sequence[String])
+ do
+ res.add "<"
+ res.add tag
+ render_attrs_in(res)
+ if is_void and children.is_empty then
+ res.add "/>"
+ else
+ res.add ">"
+ for child in children do child.render_in(res)
+ res.add "</"
+ res.add tag
+ res.add ">"
end
- if css.is_empty then return ""
- return " style='{css}'"
end
- private fun render_classes: String do
- var cls = ""
- if attrs.has_key("class") then cls = attrs["class"]
- if not classes.is_empty then cls = " class='{cls} {classes.join(" ")}'"
- if cls.is_empty then return ""
- return cls
- end
+ private fun render_attrs_in(res: Sequence[String]) do
+ if attrs.has_key("class") or not classes.is_empty then
+ res.add " class=\""
+ for cls in classes do
+ res.add cls.html_escape
+ res.add " "
+ end
+ if attrs.has_key("class") then
+ res.add attrs["class"].html_escape
+ res.add " "
+ end
+ if res.last == " " then res.pop
+ res.add "\""
+ end
+
+ if attrs.has_key("style") or not css_props.is_empty then
+ res.add " style=\""
+ for k, v in attrs do
+ res.add k.html_escape
+ res.add ": "
+ res.add v.html_escape
+ res.add "; "
+ end
+ if attrs.has_key("style") then
+ res.add(attrs["style"].html_escape)
+ end
+ if res.last == "; " then res.pop
+ res.add "\""
+ end
- private fun render_content: String do
- var str = content.html_escape
- for child in children do
- str += child.html
+ if attrs.is_empty then return
+
+ for key, value in attrs do
+ if key == "class" or key == "style" then continue
+ res.add " "
+ res.add key.html_escape
+ res.add "=\""
+ res.add value.html_escape
+ res.add "\""
end
- return str
end
end
private class HTMLRaw
super HTMLTag
+ private var content: String
init(content: String) do self.content = content
redef fun html do return content
+ redef fun render_in(res) do res.add content
end
nitlanguage / nit.git / blobdiff