cp.web.html.md

docs » cp.web.html

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Functions for Generating HTML markup.

This library allows the creation of 'safe' HTML using via code.

Examples:

local html = require "cp.web.html"
print html.p "Hello world!"                             -- "<p>Hello world!</p>"
print html.p { class = "custom" } "Hello world!"        -- "<p class='custom'>Hello world!</p>"
print html.p { class = "custom" } (
    html.b "Bold" .. " and " .. html.i "italic" .. "."
)
-- "<p class='custom'><b>Bold</b> and <i>italic</i>.</p>"
print html("1 < 2")                                     -- "1 &lt; 2" (escaped)
print html("1 < 2", true)                               -- "1 < 2" (unescaped)
print html.p ("<b>bold</b>", true)                      -- "<p><b>bold</b></p>"

Be aware that concatonating with ".." can behave unexpectedly in some cases. For example:

local name = "world!"
print html.p "Hello " .. name                   -- "<p>Hello </p>world!"

The "Hello" gets inserted into the p tag, but the name gets concatonated after the closing tag. To get the name inside the p tag, we need to put brackets around the content:

print html.p ("Hello " .. name)                 -- "<p>Hello world!</p>"

Any tag name can be generated, along with any attribute. The results are correctly escaped. There are two 'special' tag names:

• CDATA - will generate a <![CDATA[ ... ]]> section with the content contained.
• __ - (double underscore) will generate a &lt!-- ... --&gt comment block.

API Overview

• Functions - API calls offered directly by the extension
• is
• Methods - API calls which can only be made on an object returned by a constructor
• append
• prepend

API Documentation

Functions

is

Signature	cp.web.html.is(value) -> boolean
Type	Function
Description	Checks if the value is an cp.web.html block.
Parameters	value - the value to check
Returns	true if it is an HTML block, or false otherwise.

Methods

append

Signature	cp.web.html:append(newContent[, escaped]) -> self
Type	Method
Description	Appends the content. If specified, the escaped value will override any default escaping for the content type.
Parameters	newContent - The content to append to the contents of the HTML block. escaped - May be set to override default escaping for the content.
Returns	The same HTML block instance.
Notes	The newContent may be almost any value. The default handling is below: cp.web.html instance: Any other HTML block can be added. Default escaping: false. function: Functions will be executed every time the HTML block is converted to a string. Default escaping: whatever the default is for the returned value. list: Tables which are lists will be iterrated and each item will be evaluated each time the HTML block is converted to a string. Default escaping: the default for each item. everything else: Converted to a string via the tostring function. Default escaping: true.

prepend

Signature	cp.web.html:prepend(newContent[, escaped]) -> self
Type	Method
Description	Prepends the content. If specified, the escaped value will override any default escaping for the content type.
Parameters	newContent - The content to prepend to the contents of the HTML block. escaped - May be set to override default escaping for the content.
Returns	The same HTML block instance.
Notes	The newContent may be almost any value. The default handling is below: cp.web.html instance: Any other HTML block can be added. Default escaping: false. function: Functions will be executed every time the HTML block is converted to a string. Default escaping: whatever the default is for the returned value. list: Tables which are lists will be iterrated and each item will be evaluated each time the HTML block is converted to a string. Default escaping: the default for each item. everything else: Converted to a string via the tostring function. Default escaping: true.