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| var hyperHTML = (function () {'use strict';
/*! (C) 2017 Andrea Giammarchi @WebReflection (MIT) */
// hyperHTML \o/
//
// var render = hyperHTML.bind(document.body);
// setInterval(() => render`
// <h1>⚡️ hyperHTML ⚡️</h1>
// <p>
// ${(new Date).toLocaleString()}
// </p>
// `, 1000);
function hyperHTML(statics) {
return EXPANDO in this &&
this[EXPANDO].s === statics ?
update.apply(this, arguments) :
upgrade.apply(this, arguments);
}
// A wire ➰ is a bridge between a document fragment
// and its inevitably lost list of rendered nodes
//
// var render = hyperHTML.wire(optObj);
// render`
// <div>Hello Wired!</div>
// `;
//
// Every single invocation will return that div
// or the list of elements it contained as Array.
// This simplifies most task where hyperHTML
// is used to create the node itself, instead of
// populating an already known and bound one.
hyperHTML.wire = function wire(obj, type) {
return arguments.length < 1 ?
wireContent('html') :
(obj == null ?
wireContent(type || 'html') :
wireWeakly(obj, type || 'html')
);
};
// - - - - - - - - - - - - - - - - - - - - - - -
// -------------------------
// DOM parsing & traversing
// -------------------------
// setup attributes for updates
//
// <p class="${state.class}" onclick="${event.click}"></p>
//
// Note: always use quotes around attributes, even for events,
// booleans, or numbers, otherwise this function fails.
function attributesSeeker(node, actions) {
for (var
attribute,
value = IE ? uid : uidc,
attributes = IE ?
mapAttributes(node.attributes) :
slice.call(node.attributes),
i = 0,
length = attributes.length;
i < length; i++
) {
attribute = attributes[i];
if (attribute.value === value) {
// with IE the order doesn't really matter
// as long as the right attribute is addressed
actions.push(setAttribute(node, IE ?
node.getAttributeNode(IEAttributes.shift()) :
attribute
));
}
}
}
// traverse the whole node in search of editable content
// decide what each future update should change
//
// <div atr="${some.attribute}">
// <h1>${some.HTML}</h1>
// <p>
// ${some.text}
// </p>
// </div>
function lukeTreeWalker(node, actions) {
for (var
child, text,
childNodes = slice.call(node.childNodes),
length = childNodes.length,
i = 0; i < length; i++
) {
child = childNodes[i];
switch (child.nodeType) {
case 1:
attributesSeeker(child, actions);
lukeTreeWalker(child, actions);
break;
case 8:
if (child.textContent === uid) {
if (length === 1) {
actions.push(setAnyContent(node));
node.removeChild(child);
} else if (
(i < 1 || childNodes[i - 1].nodeType === 1) &&
(i + 1 === length || childNodes[i + 1].nodeType === 1)
) {
actions.push(setVirtualContent(child));
} else {
text = node.ownerDocument.createTextNode('');
actions.push(setTextContent(text));
node.replaceChild(text, child);
}
}
break;
case 3:
if (node.nodeName === 'STYLE' && child.textContent === uidc) {
actions.push(setTextContent(node));
}
break;
}
}
}
// -------------------------
// DOM manipulating
// -------------------------
// update regular bound nodes
//
// var render = hyperHTML.bind(node);
// function update() {
// render`template`;
// }
function setAnyContent(node) {
return function any(value) {
switch (typeof value) {
case 'string':
node.innerHTML = value;
break;
case 'number':
case 'boolean':
node.textContent = value;
break;
default:
if (Array.isArray(value)) {
if (value.length === 1) {
any(value[0]);
} else if(typeof value[0] === 'string') {
any(value.join(''));
} else {
var i = indexOfDiffereces(node.childNodes, value);
if (-1 < i) {
updateViaArray(node, value, i);
}
}
} else {
populateNode(node, value);
}
break;
}
};
}
// update attributes node
//
// render`<a href="${url}" onclick="${click}">${name}</a>`;
//
// Note: attributes with a special meaning like DOM Level 0
// listeners or accessors properties are directly set
function setAttribute(node, attribute) {
var
name = attribute.name,
isEvent = name.slice(0, 2) === 'on',
isSpecial = name in node && !SHOULD_USE_ATTRIBUTE.test(name),
oldValue
;
if (isSpecial) node.removeAttribute(name);
return isSpecial ?
function specialAttr(newValue) {
if (oldValue !== newValue) {
oldValue = newValue;
if (isEvent) {
node[name] = 'handleEvent' in newValue ?
newValue.handleEvent.bind(newValue) :
newValue;
} else {
node[name] = newValue;
}
}
} :
function attr(newValue) {
if (oldValue !== newValue) {
attribute.value = (oldValue = newValue);
}
};
}
// update the "emptiness"
// this function is used when template literals
// have sneaky html/fragment capable
// updates in the wild (no spaces around)
//
// render`
// <p>Content before</p>${
// 'any content in between'
// }<p>Content after</p>
// `;
//
// Note: this is the most expensive
// update of them all.
function setVirtualContent(node) {
var
fragment = node.ownerDocument.createDocumentFragment(),
childNodes = []
;
return function any(value) {
var i, parentNode = node.parentNode;
switch (typeof value) {
case 'string':
case 'number':
case 'boolean':
removeNodeList(childNodes, 0);
injectHTML(fragment, value);
childNodes = slice.call(fragment.childNodes);
parentNode.insertBefore(fragment, node);
break;
default:
if (Array.isArray(value)) {
if (value.length === 0) {
removeNodeList(childNodes, 0);
childNodes = [];
} else if(typeof value[0] === 'string') {
any(value.join(''));
} else {
i = indexOfDiffereces(childNodes, value);
if (-1 < i) {
removeNodeList(childNodes, i);
value = value.slice(i);
appendNodes(fragment, value);
parentNode.insertBefore(fragment, node);
childNodes.push.apply(childNodes, value);
}
}
} else {
removeNodeList(childNodes, 0);
childNodes = value.nodeType === 11 ?
slice.call(value.childNodes) :
[value];
parentNode.insertBefore(value, node);
}
break;
}
};
}
// basic closure to update nodes textContent
//
// render`
// <p>
// ${'spaces around means textContent'}
// </p>`;
function setTextContent(node) {
var oldValue;
return function text(newValue) {
if (oldValue !== newValue) {
node.textContent = (oldValue = newValue);
}
};
}
// -------------------------
// Helpers
// -------------------------
// it does exactly what it says
function appendNodes(node, childNodes) {
for (var
i = 0,
length = childNodes.length;
i < length; i++
) {
node.appendChild(childNodes[i]);
}
}
// given two collections, find
// the first index that has different content.
function indexOfDiffereces(a, b) {
var
i = 0,
aLength = a.length,
bLength = b.length
;
while (i < aLength) {
if (i < bLength && a[i] === b[i]) i++;
else return i;
}
return i === bLength ? -1 : i;
}
// inject HTML into a template node
// and populate a fragment with resulting nodes
//
// IE9~IE11 are not compatible with the template tag.
// If the content is a partial part of a table there is a fallback.
// Not the most elegant/robust way but good enough for common cases.
// (I don't want to include a whole DOM parser for IE only here).
function injectHTML(fragment, html) {
var
template = fragment.ownerDocument.createElement('template'),
fallback = IE &&
!('content' in template) &&
/^[^\S]*?<(t(?:head|body|foot|r|d|h))/i.test(html)
;
template.innerHTML = fallback ? ('<table>' + html + '</table>') : html;
if (fallback) {
template = {childNodes: template.querySelectorAll(RegExp.$1)};
}
appendNodes(
fragment,
slice.call((template.content || template).childNodes)
);
}
// IE / Edge Attributes values are resolved at runtime
// no attribute.value is found if these are cleaned up when special
// TODO: this might be used for every browser instead of slice.call
// to grant both name and value are preserved.
// However, this really looks just an IE/Edge bug.
function mapAttributes(attributes) {
for (var out = [], i = attributes.length; i--; out[i] = {
name: attributes[i].name,
value: attributes[i].value
});
return out;
}
// accordingly with the kind of child
// it puts its content into a parent node
function populateNode(parent, child) {
switch (child.nodeType) {
case 1:
var childNodes = parent.childNodes;
if (0 < childNodes.length) {
if (childNodes[0] === child) {
removeNodeList(childNodes, 1);
break;
}
}
resetAndPopulate(parent, child);
break;
case 11:
if (-1 < indexOfDiffereces(parent.childNodes, child.childNodes)) {
resetAndPopulate(parent, child);
}
break;
case 3:
parent.textContent = child.textContent;
break;
}
}
// it does exactly what it says
function removeNodeList(list, startIndex) {
var length = list.length, child;
while (startIndex < length--) {
child = list[length];
child.parentNode.removeChild(child);
}
}
// drop all nodes and append a node
function resetAndPopulate(parent, child) {
parent.textContent = '';
parent.appendChild(child);
}
// the first time a hyperHTML.wire() is invoked
// remember the list of nodes that should be updated
// at every consequent render call.
// The resulting function might return the very first node
// or the Array of all nodes that might need updates.
function setupAndGetContent(node) {
for (var
child,
children = [],
childNodes = node.childNodes,
i = 0,
length = childNodes.length;
i < length; i++
) {
child = childNodes[i];
if (
1 === child.nodeType ||
0 < trim.call(child.textContent).length
) {
children.push(child);
}
}
length = children.length;
return length < 2 ?
((child = length < 1 ? node : children[0]),
function () { return child; }) :
function () { return children; };
}
// remove and/or and a list of nodes through an array
function updateViaArray(node, childNodes, i) {
var fragment = node.ownerDocument.createDocumentFragment();
if (0 < i) {
removeNodeList(node.childNodes, i);
appendNodes(fragment, childNodes.slice(i));
node.appendChild(fragment);
} else {
appendNodes(fragment, childNodes);
resetAndPopulate(node, fragment);
}
}
// create a new wire for generic DOM content
function wireContent(type) {
var content, container, fragment, render, setup, template;
return function update(statics) {
if (template !== statics) {
setup = true;
template = statics;
fragment = document.createDocumentFragment();
container = type === 'svg' ?
document.createElementNS('http://www.w3.org/2000/svg', 'svg') :
fragment;
render = hyperHTML.bind(container);
}
render.apply(null, arguments);
if (setup) {
setup = false;
if (type === 'svg') {
appendNodes(fragment, slice.call(container.childNodes));
}
content = setupAndGetContent(fragment);
}
return content();
};
}
// returns or create a weak wire by ID
function wireByID(wires, id, type) {
return wires[id] || (wires[id] = wireContent(type));
}
// setup a weak reference if needed and return a wire by ID
function wireWeakly(obj, type) {
var
wires = wm.get(obj) || (wm.set(obj, wires = {}), wires),
i = type.indexOf(':')
;
return i < 0 ?
wireByID(wires, type, type) :
wireByID(wires, type.slice(i + 1), type.slice(0, i) || 'html');
}
// -------------------------
// Template setup
// -------------------------
// each known hyperHTML update is
// kept as simple as possible.
function update() {
for (var
i = 1,
length = arguments.length,
updates = this[EXPANDO].u;
i < length; i++
) {
updates[i - 1](arguments[i]);
}
return this;
}
// but the first time, it needs to be setup.
// From now on, only update(statics) will be called
// unless this node won't be used for other renderings.
function upgrade(statics) {
var
updates = [],
html = statics.join(uidc)
;
if (IE) {
IEAttributes = [];
removeNodeList(this.childNodes, 0);
injectHTML(this, html.replace(no, comments));
} else if (this.nodeType === 1) {
this.innerHTML = html;
} else {
injectHTML(this, html);
}
lukeTreeWalker(this, updates);
this[EXPANDO] = {s: statics, u: updates};
return update.apply(this, arguments);
}
// -------------------------
// local variables
// -------------------------
var
// some attribute might be present on the element prototype but cannot be set directly
SHOULD_USE_ATTRIBUTE = /^style$/i,
// avoids WeakMap to avoid memory pressure, use CSS compatible syntax for IE
EXPANDO = '_hyper_html: ',
// use a pseudo unique id to avoid conflicts and normalize CSS style for IE
uid = EXPANDO + ((Math.random() * new Date) | 0) + ';',
// use comment nodes with pseudo unique content to setup
uidc = '<!--' + uid + '-->',
// if attributes order is shuffled, threat the browser differently
IE = (function (p) {
p.innerHTML = '<i data-i="" class=""></i>';
return /class/i.test(p.firstChild.attributes[0].name);
}(document.createElement('p'))),
no = IE && new RegExp('([^\\S][a-z]+[a-z0-9_-]*=)([\'"])' + uidc + '\\2', 'g'),
comments = IE && function ($0, $1, $2) {
IEAttributes.push($1.slice(1, -1));
return $1 + $2 + uid + $2;
},
// verify empty textContent on .wire() setup
trim = EXPANDO.trim || function () {
return this.replace(/^\s+|\s+$/g, '');
},
// convert DOM.childNodes into arrays to avoid
// DOM mutation backfiring on loops
slice = [].slice,
// used for weak references
// if WeakMap is not available
// it uses a configurable, non enumerable,
// quick and dirty expando property.
wm = typeof WeakMap === typeof wm ?
{
get: function (obj) { return obj[EXPANDO]; },
set: function (obj, value) {
Object.defineProperty(obj, EXPANDO, {
configurable: true,
value: value
});
}
} :
new WeakMap(),
IEAttributes
;
// -------------------------
// ⚡️ ️️The End ➰
// -------------------------
return hyperHTML;
}());
// umd.KISS
try { module.exports = hyperHTML; } catch(o_O) {}
|