# vim:fileencoding=utf-8
# License: GPL v3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>

html_elements = {
    'a', 'abbr', 'acronym', 'address', 'area',
    'article', 'aside', 'audio', 'b', 'big', 'blockquote', 'br', 'button',
    'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup',
    'command', 'datagrid', 'datalist', 'dd', 'del', 'details', 'dfn',
    'dialog', 'dir', 'div', 'dl', 'dt', 'em', 'event-source', 'fieldset',
    'figcaption', 'figure', 'footer', 'font', 'form', 'header', 'h1',
    'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'input', 'ins',
    'keygen', 'kbd', 'label', 'legend', 'li', 'm', 'map', 'menu', 'meter',
    'multicol', 'nav', 'nextid', 'ol', 'output', 'optgroup', 'option',
    'p', 'pre', 'progress', 'q', 's', 'samp', 'script', 'section', 'select',
    'small', 'sound', 'source', 'spacer', 'span', 'strike', 'strong', 'style',
    'sub', 'sup', 'table', 'tbody', 'td', 'textarea', 'time', 'tfoot',
    'th', 'thead', 'tr', 'tt', 'u', 'ul', 'var', 'video'
}

mathml_elements = {
    'maction', 'math', 'merror', 'mfrac', 'mi',
    'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom',
    'mprescripts', 'mroot', 'mrow', 'mspace', 'msqrt', 'mstyle', 'msub',
    'msubsup', 'msup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder',
    'munderover', 'none'
}

svg_elements = {
    'a', 'animate', 'animateColor', 'animateMotion',
    'animateTransform', 'clipPath', 'circle', 'defs', 'desc', 'ellipse',
    'font-face', 'font-face-name', 'font-face-src', 'g', 'glyph', 'hkern',
    'linearGradient', 'line', 'marker', 'metadata', 'missing-glyph',
    'mpath', 'path', 'polygon', 'polyline', 'radialGradient', 'rect',
    'set', 'stop', 'svg', 'switch', 'text', 'title', 'tspan', 'use'
}

html5_tags = html_elements.union(mathml_elements).union(svg_elements)

def _makeelement(tag, *args, **kwargs):
    ans = this.createElement(tag)

    for attr in kwargs:
        vattr = str.replace(str.rstrip(attr, '_'), '_', '-')
        val = kwargs[attr]
        if callable(val):
            if str.startswith(attr, 'on'):
                attr = attr[2:]
            ans.addEventListener(attr, val)
        else:
            ans.setAttribute(vattr, val)

    for arg in args:
        if type(arg) is 'string':
            arg = this.createTextNode(arg)
        ans.appendChild(arg)
    return ans

def maker_for_document(document):
    # Create an elementmaker to be used with the specified document
    E = _makeelement.bind(document)
    for tag in html5_tags:
        Object.defineProperty(E, tag, {'value':_makeelement.bind(document, tag)})
    return E

if type(document) is 'undefined':
    E = maker_for_document({
        'createTextNode': def(value): return value;,
        'createElement': def(name):
            return  {
                'name':name,
                'children':[],
                'attributes':{},
                'setAttribute': def(name, val): this.attributes[name] = val;,
                'appendChild': def(child): this.children.push(child);,
            }
    })
else:
    E = maker_for_document(document)