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| import $ from 'jquery';
import func from './func';
import lists from './lists';
import env from './env';
const NBSP_CHAR = String.fromCharCode(160);
const ZERO_WIDTH_NBSP_CHAR = '\ufeff';
/**
* @method isEditable
*
* returns whether node is `note-editable` or not.
*
* @param {Node} node
* @return {Boolean}
*/
function isEditable(node) {
return node && $(node).hasClass('note-editable');
}
/**
* @method isControlSizing
*
* returns whether node is `note-control-sizing` or not.
*
* @param {Node} node
* @return {Boolean}
*/
function isControlSizing(node) {
return node && $(node).hasClass('note-control-sizing');
}
/**
* @method makePredByNodeName
*
* returns predicate which judge whether nodeName is same
*
* @param {String} nodeName
* @return {Function}
*/
function makePredByNodeName(nodeName) {
nodeName = nodeName.toUpperCase();
return function(node) {
return node && node.nodeName.toUpperCase() === nodeName;
};
}
/**
* @method isText
*
*
*
* @param {Node} node
* @return {Boolean} true if node's type is text(3)
*/
function isText(node) {
return node && node.nodeType === 3;
}
/**
* @method isElement
*
*
*
* @param {Node} node
* @return {Boolean} true if node's type is element(1)
*/
function isElement(node) {
return node && node.nodeType === 1;
}
/**
* ex) br, col, embed, hr, img, input, ...
* @see http://www.w3.org/html/wg/drafts/html/master/syntax.html#void-elements
*/
function isVoid(node) {
return node && /^BR|^IMG|^HR|^IFRAME|^BUTTON|^INPUT/.test(node.nodeName.toUpperCase());
}
function isPara(node) {
if (isEditable(node)) {
return false;
}
// Chrome(v31.0), FF(v25.0.1) use DIV for paragraph
return node && /^DIV|^P|^LI|^H[1-7]/.test(node.nodeName.toUpperCase());
}
function isHeading(node) {
return node && /^H[1-7]/.test(node.nodeName.toUpperCase());
}
const isPre = makePredByNodeName('PRE');
const isLi = makePredByNodeName('LI');
function isPurePara(node) {
return isPara(node) && !isLi(node);
}
const isTable = makePredByNodeName('TABLE');
const isData = makePredByNodeName('DATA');
function isInline(node) {
return !isBodyContainer(node) &&
!isList(node) &&
!isHr(node) &&
!isPara(node) &&
!isTable(node) &&
!isBlockquote(node) &&
!isData(node);
}
function isList(node) {
return node && /^UL|^OL/.test(node.nodeName.toUpperCase());
}
const isHr = makePredByNodeName('HR');
function isCell(node) {
return node && /^TD|^TH/.test(node.nodeName.toUpperCase());
}
const isBlockquote = makePredByNodeName('BLOCKQUOTE');
function isBodyContainer(node) {
return isCell(node) || isBlockquote(node) || isEditable(node);
}
const isAnchor = makePredByNodeName('A');
function isParaInline(node) {
return isInline(node) && !!ancestor(node, isPara);
}
function isBodyInline(node) {
return isInline(node) && !ancestor(node, isPara);
}
const isBody = makePredByNodeName('BODY');
/**
* returns whether nodeB is closest sibling of nodeA
*
* @param {Node} nodeA
* @param {Node} nodeB
* @return {Boolean}
*/
function isClosestSibling(nodeA, nodeB) {
return nodeA.nextSibling === nodeB ||
nodeA.previousSibling === nodeB;
}
/**
* returns array of closest siblings with node
*
* @param {Node} node
* @param {function} [pred] - predicate function
* @return {Node[]}
*/
function withClosestSiblings(node, pred) {
pred = pred || func.ok;
const siblings = [];
Iif (node.previousSibling && pred(node.previousSibling)) {
siblings.push(node.previousSibling);
}
siblings.push(node);
if (node.nextSibling && pred(node.nextSibling)) {
siblings.push(node.nextSibling);
}
return siblings;
}
/**
* blank HTML for cursor position
* - [workaround] old IE only works with
* - [workaround] IE11 and other browser works with bogus br
*/
const blankHTML = env.isMSIE && env.browserVersion < 11 ? ' ' : '<br>';
/**
* @method nodeLength
*
* returns #text's text size or element's childNodes size
*
* @param {Node} node
*/
function nodeLength(node) {
if (isText(node)) {
return node.nodeValue.length;
}
Eif (node) {
return node.childNodes.length;
}
return 0;
}
/**
* returns whether node is empty or not.
*
* @param {Node} node
* @return {Boolean}
*/
function isEmpty(node) {
const len = nodeLength(node);
if (len === 0) {
return true;
} else if (!isText(node) && len === 1 && node.innerHTML === blankHTML) {
// ex) <p><br></p>, <span><br></span>
return true;
} else Iif (lists.all(node.childNodes, isText) && node.innerHTML === '') {
// ex) <p></p>, <span></span>
return true;
}
return false;
}
/**
* padding blankHTML if node is empty (for cursor position)
*/
function paddingBlankHTML(node) {
if (!isVoid(node) && !nodeLength(node)) {
node.innerHTML = blankHTML;
}
}
/**
* find nearest ancestor predicate hit
*
* @param {Node} node
* @param {Function} pred - predicate function
*/
function ancestor(node, pred) {
while (node) {
if (pred(node)) { return node; }
if (isEditable(node)) { break; }
node = node.parentNode;
}
return null;
}
/**
* find nearest ancestor only single child blood line and predicate hit
*
* @param {Node} node
* @param {Function} pred - predicate function
*/
function singleChildAncestor(node, pred) {
node = node.parentNode;
while (node) {
if (nodeLength(node) !== 1) { break; }
if (pred(node)) { return node; }
if (isEditable(node)) { break; }
node = node.parentNode;
}
return null;
}
/**
* returns new array of ancestor nodes (until predicate hit).
*
* @param {Node} node
* @param {Function} [optional] pred - predicate function
*/
function listAncestor(node, pred) {
pred = pred || func.fail;
const ancestors = [];
ancestor(node, function(el) {
if (!isEditable(el)) {
ancestors.push(el);
}
return pred(el);
});
return ancestors;
}
/**
* find farthest ancestor predicate hit
*/
function lastAncestor(node, pred) {
const ancestors = listAncestor(node);
return lists.last(ancestors.filter(pred));
}
/**
* returns common ancestor node between two nodes.
*
* @param {Node} nodeA
* @param {Node} nodeB
*/
function commonAncestor(nodeA, nodeB) {
const ancestors = listAncestor(nodeA);
for (let n = nodeB; n; n = n.parentNode) {
if ($.inArray(n, ancestors) > -1) { return n; }
}
return null; // difference document area
}
/**
* listing all previous siblings (until predicate hit).
*
* @param {Node} node
* @param {Function} [optional] pred - predicate function
*/
function listPrev(node, pred) {
pred = pred || func.fail;
const nodes = [];
while (node) {
if (pred(node)) { break; }
nodes.push(node);
node = node.previousSibling;
}
return nodes;
}
/**
* listing next siblings (until predicate hit).
*
* @param {Node} node
* @param {Function} [pred] - predicate function
*/
function listNext(node, pred) {
pred = pred || func.fail;
const nodes = [];
while (node) {
if (pred(node)) { break; }
nodes.push(node);
node = node.nextSibling;
}
return nodes;
}
/**
* listing descendant nodes
*
* @param {Node} node
* @param {Function} [pred] - predicate function
*/
function listDescendant(node, pred) {
const descendants = [];
pred = pred || func.ok;
// start DFS(depth first search) with node
(function fnWalk(current) {
if (node !== current && pred(current)) {
descendants.push(current);
}
for (let idx = 0, len = current.childNodes.length; idx < len; idx++) {
fnWalk(current.childNodes[idx]);
}
})(node);
return descendants;
}
/**
* wrap node with new tag.
*
* @param {Node} node
* @param {Node} tagName of wrapper
* @return {Node} - wrapper
*/
function wrap(node, wrapperName) {
const parent = node.parentNode;
const wrapper = $('<' + wrapperName + '>')[0];
parent.insertBefore(wrapper, node);
wrapper.appendChild(node);
return wrapper;
}
/**
* insert node after preceding
*
* @param {Node} node
* @param {Node} preceding - predicate function
*/
function insertAfter(node, preceding) {
const next = preceding.nextSibling;
let parent = preceding.parentNode;
if (next) {
parent.insertBefore(node, next);
} else {
parent.appendChild(node);
}
return node;
}
/**
* append elements.
*
* @param {Node} node
* @param {Collection} aChild
*/
function appendChildNodes(node, aChild) {
$.each(aChild, function(idx, child) {
node.appendChild(child);
});
return node;
}
/**
* returns whether boundaryPoint is left edge or not.
*
* @param {BoundaryPoint} point
* @return {Boolean}
*/
function isLeftEdgePoint(point) {
return point.offset === 0;
}
/**
* returns whether boundaryPoint is right edge or not.
*
* @param {BoundaryPoint} point
* @return {Boolean}
*/
function isRightEdgePoint(point) {
return point.offset === nodeLength(point.node);
}
/**
* returns whether boundaryPoint is edge or not.
*
* @param {BoundaryPoint} point
* @return {Boolean}
*/
function isEdgePoint(point) {
return isLeftEdgePoint(point) || isRightEdgePoint(point);
}
/**
* returns whether node is left edge of ancestor or not.
*
* @param {Node} node
* @param {Node} ancestor
* @return {Boolean}
*/
function isLeftEdgeOf(node, ancestor) {
while (node && node !== ancestor) {
if (position(node) !== 0) {
return false;
}
node = node.parentNode;
}
return true;
}
/**
* returns whether node is right edge of ancestor or not.
*
* @param {Node} node
* @param {Node} ancestor
* @return {Boolean}
*/
function isRightEdgeOf(node, ancestor) {
Iif (!ancestor) {
return false;
}
while (node && node !== ancestor) {
if (position(node) !== nodeLength(node.parentNode) - 1) {
return false;
}
node = node.parentNode;
}
return true;
}
/**
* returns whether point is left edge of ancestor or not.
* @param {BoundaryPoint} point
* @param {Node} ancestor
* @return {Boolean}
*/
function isLeftEdgePointOf(point, ancestor) {
return isLeftEdgePoint(point) && isLeftEdgeOf(point.node, ancestor);
}
/**
* returns whether point is right edge of ancestor or not.
* @param {BoundaryPoint} point
* @param {Node} ancestor
* @return {Boolean}
*/
function isRightEdgePointOf(point, ancestor) {
return isRightEdgePoint(point) && isRightEdgeOf(point.node, ancestor);
}
/**
* returns offset from parent.
*
* @param {Node} node
*/
function position(node) {
let offset = 0;
while ((node = node.previousSibling)) {
offset += 1;
}
return offset;
}
function hasChildren(node) {
return !!(node && node.childNodes && node.childNodes.length);
}
/**
* returns previous boundaryPoint
*
* @param {BoundaryPoint} point
* @param {Boolean} isSkipInnerOffset
* @return {BoundaryPoint}
*/
function prevPoint(point, isSkipInnerOffset) {
let node;
let offset;
if (point.offset === 0) {
Iif (isEditable(point.node)) {
return null;
}
node = point.node.parentNode;
offset = position(point.node);
} else if (hasChildren(point.node)) {
node = point.node.childNodes[point.offset - 1];
offset = nodeLength(node);
} else {
node = point.node;
offset = isSkipInnerOffset ? 0 : point.offset - 1;
}
return {
node: node,
offset: offset
};
}
/**
* returns next boundaryPoint
*
* @param {BoundaryPoint} point
* @param {Boolean} isSkipInnerOffset
* @return {BoundaryPoint}
*/
function nextPoint(point, isSkipInnerOffset) {
let node, offset;
if (nodeLength(point.node) === point.offset) {
Iif (isEditable(point.node)) {
return null;
}
node = point.node.parentNode;
offset = position(point.node) + 1;
} else if (hasChildren(point.node)) {
node = point.node.childNodes[point.offset];
offset = 0;
} else {
node = point.node;
offset = isSkipInnerOffset ? nodeLength(point.node) : point.offset + 1;
}
return {
node: node,
offset: offset
};
}
/**
* returns whether pointA and pointB is same or not.
*
* @param {BoundaryPoint} pointA
* @param {BoundaryPoint} pointB
* @return {Boolean}
*/
function isSamePoint(pointA, pointB) {
return pointA.node === pointB.node && pointA.offset === pointB.offset;
}
/**
* returns whether point is visible (can set cursor) or not.
*
* @param {BoundaryPoint} point
* @return {Boolean}
*/
function isVisiblePoint(point) {
if (isText(point.node) || !hasChildren(point.node) || isEmpty(point.node)) {
return true;
}
const leftNode = point.node.childNodes[point.offset - 1];
const rightNode = point.node.childNodes[point.offset];
if ((!leftNode || isVoid(leftNode)) && (!rightNode || isVoid(rightNode))) {
return true;
}
return false;
}
/**
* @method prevPointUtil
*
* @param {BoundaryPoint} point
* @param {Function} pred
* @return {BoundaryPoint}
*/
function prevPointUntil(point, pred) {
while (point) {
if (pred(point)) {
return point;
}
point = prevPoint(point);
}
return null;
}
/**
* @method nextPointUntil
*
* @param {BoundaryPoint} point
* @param {Function} pred
* @return {BoundaryPoint}
*/
function nextPointUntil(point, pred) {
while (point) {
if (pred(point)) {
return point;
}
point = nextPoint(point);
}
return null;
}
/**
* returns whether point has character or not.
*
* @param {Point} point
* @return {Boolean}
*/
function isCharPoint(point) {
Iif (!isText(point.node)) {
return false;
}
const ch = point.node.nodeValue.charAt(point.offset - 1);
return ch && (ch !== ' ' && ch !== NBSP_CHAR);
}
/**
* @method walkPoint
*
* @param {BoundaryPoint} startPoint
* @param {BoundaryPoint} endPoint
* @param {Function} handler
* @param {Boolean} isSkipInnerOffset
*/
function walkPoint(startPoint, endPoint, handler, isSkipInnerOffset) {
let point = startPoint;
while (point) {
handler(point);
if (isSamePoint(point, endPoint)) {
break;
}
const isSkipOffset = isSkipInnerOffset &&
startPoint.node !== point.node &&
endPoint.node !== point.node;
point = nextPoint(point, isSkipOffset);
}
}
/**
* @method makeOffsetPath
*
* return offsetPath(array of offset) from ancestor
*
* @param {Node} ancestor - ancestor node
* @param {Node} node
*/
function makeOffsetPath(ancestor, node) {
const ancestors = listAncestor(node, func.eq(ancestor));
return ancestors.map(position).reverse();
}
/**
* @method fromOffsetPath
*
* return element from offsetPath(array of offset)
*
* @param {Node} ancestor - ancestor node
* @param {array} offsets - offsetPath
*/
function fromOffsetPath(ancestor, offsets) {
let current = ancestor;
for (let i = 0, len = offsets.length; i < len; i++) {
Iif (current.childNodes.length <= offsets[i]) {
current = current.childNodes[current.childNodes.length - 1];
} else {
current = current.childNodes[offsets[i]];
}
}
return current;
}
/**
* @method splitNode
*
* split element or #text
*
* @param {BoundaryPoint} point
* @param {Object} [options]
* @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false
* @param {Boolean} [options.isNotSplitEdgePoint] - default: false
* @return {Node} right node of boundaryPoint
*/
function splitNode(point, options) {
const isSkipPaddingBlankHTML = options && options.isSkipPaddingBlankHTML;
const isNotSplitEdgePoint = options && options.isNotSplitEdgePoint;
// edge case
if (isEdgePoint(point) && (isText(point.node) || isNotSplitEdgePoint)) {
if (isLeftEdgePoint(point)) {
return point.node;
} else Eif (isRightEdgePoint(point)) {
return point.node.nextSibling;
}
}
// split #text
if (isText(point.node)) {
return point.node.splitText(point.offset);
} else {
const childNode = point.node.childNodes[point.offset];
const clone = insertAfter(point.node.cloneNode(false), point.node);
appendChildNodes(clone, listNext(childNode));
if (!isSkipPaddingBlankHTML) {
paddingBlankHTML(point.node);
paddingBlankHTML(clone);
}
return clone;
}
}
/**
* @method splitTree
*
* split tree by point
*
* @param {Node} root - split root
* @param {BoundaryPoint} point
* @param {Object} [options]
* @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false
* @param {Boolean} [options.isNotSplitEdgePoint] - default: false
* @return {Node} right node of boundaryPoint
*/
function splitTree(root, point, options) {
// ex) [#text, <span>, <p>]
const ancestors = listAncestor(point.node, func.eq(root));
Iif (!ancestors.length) {
return null;
} else if (ancestors.length === 1) {
return splitNode(point, options);
}
return ancestors.reduce(function(node, parent) {
if (node === point.node) {
node = splitNode(point, options);
}
return splitNode({
node: parent,
offset: node ? position(node) : nodeLength(parent)
}, options);
});
}
/**
* split point
*
* @param {Point} point
* @param {Boolean} isInline
* @return {Object}
*/
function splitPoint(point, isInline) {
// find splitRoot, container
// - inline: splitRoot is a child of paragraph
// - block: splitRoot is a child of bodyContainer
const pred = isInline ? isPara : isBodyContainer;
const ancestors = listAncestor(point.node, pred);
const topAncestor = lists.last(ancestors) || point.node;
let splitRoot, container;
if (pred(topAncestor)) {
splitRoot = ancestors[ancestors.length - 2];
container = topAncestor;
} else {
splitRoot = topAncestor;
container = splitRoot.parentNode;
}
// if splitRoot is exists, split with splitTree
let pivot = splitRoot && splitTree(splitRoot, point, {
isSkipPaddingBlankHTML: isInline,
isNotSplitEdgePoint: isInline
});
// if container is point.node, find pivot with point.offset
if (!pivot && container === point.node) {
pivot = point.node.childNodes[point.offset];
}
return {
rightNode: pivot,
container: container
};
}
function create(nodeName) {
return document.createElement(nodeName);
}
function createText(text) {
return document.createTextNode(text);
}
/**
* @method remove
*
* remove node, (isRemoveChild: remove child or not)
*
* @param {Node} node
* @param {Boolean} isRemoveChild
*/
function remove(node, isRemoveChild) {
if (!node || !node.parentNode) { return; }
Iif (node.removeNode) { return node.removeNode(isRemoveChild); }
const parent = node.parentNode;
if (!isRemoveChild) {
const nodes = [];
for (let i = 0, len = node.childNodes.length; i < len; i++) {
nodes.push(node.childNodes[i]);
}
for (let i = 0, len = nodes.length; i < len; i++) {
parent.insertBefore(nodes[i], node);
}
}
parent.removeChild(node);
}
/**
* @method removeWhile
*
* @param {Node} node
* @param {Function} pred
*/
function removeWhile(node, pred) {
while (node) {
if (isEditable(node) || !pred(node)) {
break;
}
const parent = node.parentNode;
remove(node);
node = parent;
}
}
/**
* @method replace
*
* replace node with provided nodeName
*
* @param {Node} node
* @param {String} nodeName
* @return {Node} - new node
*/
function replace(node, nodeName) {
Iif (node.nodeName.toUpperCase() === nodeName.toUpperCase()) {
return node;
}
const newNode = create(nodeName);
Iif (node.style.cssText) {
newNode.style.cssText = node.style.cssText;
}
appendChildNodes(newNode, lists.from(node.childNodes));
insertAfter(newNode, node);
remove(node);
return newNode;
}
const isTextarea = makePredByNodeName('TEXTAREA');
/**
* @param {jQuery} $node
* @param {Boolean} [stripLinebreaks] - default: false
*/
function value($node, stripLinebreaks) {
const val = isTextarea($node[0]) ? $node.val() : $node.html();
Iif (stripLinebreaks) {
return val.replace(/[\n\r]/g, '');
}
return val;
}
/**
* @method html
*
* get the HTML contents of node
*
* @param {jQuery} $node
* @param {Boolean} [isNewlineOnBlock]
*/
function html($node, isNewlineOnBlock) {
let markup = value($node);
Iif (isNewlineOnBlock) {
const regexTag = /<(\/?)(\b(?!!)[^>\s]*)(.*?)(\s*\/?>)/g;
markup = markup.replace(regexTag, function(match, endSlash, name) {
name = name.toUpperCase();
const isEndOfInlineContainer = /^DIV|^TD|^TH|^P|^LI|^H[1-7]/.test(name) &&
!!endSlash;
const isBlockNode = /^BLOCKQUOTE|^TABLE|^TBODY|^TR|^HR|^UL|^OL/.test(name);
return match + ((isEndOfInlineContainer || isBlockNode) ? '\n' : '');
});
markup = $.trim(markup);
}
return markup;
}
function posFromPlaceholder(placeholder) {
const $placeholder = $(placeholder);
const pos = $placeholder.offset();
const height = $placeholder.outerHeight(true); // include margin
return {
left: pos.left,
top: pos.top + height
};
}
function attachEvents($node, events) {
Object.keys(events).forEach(function(key) {
$node.on(key, events[key]);
});
}
function detachEvents($node, events) {
Object.keys(events).forEach(function(key) {
$node.off(key, events[key]);
});
}
/**
* @method isCustomStyleTag
*
* assert if a node contains a "note-styletag" class,
* which implies that's a custom-made style tag node
*
* @param {Node} an HTML DOM node
*/
function isCustomStyleTag(node) {
return node && !isText(node) && lists.contains(node.classList, 'note-styletag');
}
export default {
/** @property {String} NBSP_CHAR */
NBSP_CHAR,
/** @property {String} ZERO_WIDTH_NBSP_CHAR */
ZERO_WIDTH_NBSP_CHAR,
/** @property {String} blank */
blank: blankHTML,
/** @property {String} emptyPara */
emptyPara: `<p>${blankHTML}</p>`,
makePredByNodeName,
isEditable,
isControlSizing,
isText,
isElement,
isVoid,
isPara,
isPurePara,
isHeading,
isInline,
isBlock: func.not(isInline),
isBodyInline,
isBody,
isParaInline,
isPre,
isList,
isTable,
isData,
isCell,
isBlockquote,
isBodyContainer,
isAnchor,
isDiv: makePredByNodeName('DIV'),
isLi,
isBR: makePredByNodeName('BR'),
isSpan: makePredByNodeName('SPAN'),
isB: makePredByNodeName('B'),
isU: makePredByNodeName('U'),
isS: makePredByNodeName('S'),
isI: makePredByNodeName('I'),
isImg: makePredByNodeName('IMG'),
isTextarea,
isEmpty,
isEmptyAnchor: func.and(isAnchor, isEmpty),
isClosestSibling,
withClosestSiblings,
nodeLength,
isLeftEdgePoint,
isRightEdgePoint,
isEdgePoint,
isLeftEdgeOf,
isRightEdgeOf,
isLeftEdgePointOf,
isRightEdgePointOf,
prevPoint,
nextPoint,
isSamePoint,
isVisiblePoint,
prevPointUntil,
nextPointUntil,
isCharPoint,
walkPoint,
ancestor,
singleChildAncestor,
listAncestor,
lastAncestor,
listNext,
listPrev,
listDescendant,
commonAncestor,
wrap,
insertAfter,
appendChildNodes,
position,
hasChildren,
makeOffsetPath,
fromOffsetPath,
splitTree,
splitPoint,
create,
createText,
remove,
removeWhile,
replace,
html,
value,
posFromPlaceholder,
attachEvents,
detachEvents,
isCustomStyleTag
};
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