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selection.js
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selection.js
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/**
* Selection API
*
* @example
* var selection = new wysihtml.Selection(editor);
*/
(function(wysihtml) {
var dom = wysihtml.dom;
function _getCumulativeOffsetTop(element) {
var top = 0;
if (element.parentNode) {
do {
top += element.offsetTop || 0;
element = element.offsetParent;
} while (element);
}
return top;
}
// Provides the depth of ``descendant`` relative to ``ancestor``
function getDepth(ancestor, descendant) {
var ret = 0;
while (descendant !== ancestor) {
ret++;
descendant = descendant.parentNode;
if (!descendant)
throw new Error("not a descendant of ancestor!");
}
return ret;
}
function getRangeNode(node, offset) {
if (node.nodeType === 3) {
return node;
} else {
return node.childNodes[offset] || node;
}
}
function getWebkitSelectionFixNode(container) {
var blankNode = document.createElement('span');
var placeholderRemover = function(event) {
// Self-destructs the caret and keeps the text inserted into it by user
var lastChild;
container.removeEventListener('mouseup', placeholderRemover);
container.removeEventListener('keydown', placeholderRemover);
container.removeEventListener('touchstart', placeholderRemover);
container.removeEventListener('focus', placeholderRemover);
container.removeEventListener('blur', placeholderRemover);
container.removeEventListener('paste', delayedPlaceholderRemover);
container.removeEventListener('drop', delayedPlaceholderRemover);
container.removeEventListener('beforepaste', delayedPlaceholderRemover);
if (blankNode && blankNode.parentNode) {
blankNode.parentNode.removeChild(blankNode);
}
},
delayedPlaceholderRemover = function (event) {
if (blankNode && blankNode.parentNode) {
setTimeout(placeholderRemover, 0);
}
};
blankNode.appendChild(container.ownerDocument.createTextNode(wysihtml.INVISIBLE_SPACE));
blankNode.className = '_wysihtml-temp-caret-fix';
blankNode.style.display = 'block';
blankNode.style.minWidth = '1px';
blankNode.style.height = '0px';
container.addEventListener('mouseup', placeholderRemover);
container.addEventListener('keydown', placeholderRemover);
container.addEventListener('touchstart', placeholderRemover);
container.addEventListener('focus', placeholderRemover);
container.addEventListener('blur', placeholderRemover);
container.addEventListener('paste', delayedPlaceholderRemover);
container.addEventListener('drop', delayedPlaceholderRemover);
container.addEventListener('beforepaste', delayedPlaceholderRemover);
return blankNode;
}
// Should fix the obtained ranges that cannot surrond contents normally to apply changes upon
// Being considerate to firefox that sets range start start out of span and end inside on doubleclick initiated selection
function expandRangeToSurround(range) {
if (range.canSurroundContents()) return;
var common = range.commonAncestorContainer,
start_depth = getDepth(common, range.startContainer),
end_depth = getDepth(common, range.endContainer);
while(!range.canSurroundContents()) {
// In the following branches, we cannot just decrement the depth variables because the setStartBefore/setEndAfter may move the start or end of the range more than one level relative to ``common``. So we need to recompute the depth.
if (start_depth > end_depth) {
range.setStartBefore(range.startContainer);
start_depth = getDepth(common, range.startContainer);
}
else {
range.setEndAfter(range.endContainer);
end_depth = getDepth(common, range.endContainer);
}
}
}
wysihtml.Selection = Base.extend(
/** @scope wysihtml.Selection.prototype */ {
constructor: function(editor, contain, unselectableClass) {
// Make sure that our external range library is initialized
rangy.init();
this.editor = editor;
this.composer = editor.composer;
this.doc = this.composer.doc;
this.win = this.composer.win;
this.contain = contain;
this.unselectableClass = unselectableClass || false;
},
/**
* Get the current selection as a bookmark to be able to later restore it
*
* @return {Object} An object that represents the current selection
*/
getBookmark: function() {
var range = this.getRange();
return range && range.cloneRange();
},
/**
* Restore a selection retrieved via wysihtml.Selection.prototype.getBookmark
*
* @param {Object} bookmark An object that represents the current selection
*/
setBookmark: function(bookmark) {
if (!bookmark) {
return;
}
this.setSelection(bookmark);
},
/**
* Set the caret in front of the given node
*
* @param {Object} node The element or text node where to position the caret in front of
* @example
* selection.setBefore(myElement);
*/
setBefore: function(node) {
var range = rangy.createRange(this.doc);
range.setStartBefore(node);
range.setEndBefore(node);
return this.setSelection(range);
},
// Constructs a self removing whitespace (ain absolute positioned span) for placing selection caret when normal methods fail.
// Webkit has an issue with placing caret into places where there are no textnodes near by.
createTemporaryCaretSpaceAfter: function (node) {
var caretPlaceholder = this.doc.createElement('span'),
caretPlaceholderText = this.doc.createTextNode(wysihtml.INVISIBLE_SPACE),
placeholderRemover = (function(event) {
// Self-destructs the caret and keeps the text inserted into it by user
var lastChild;
this.contain.removeEventListener('mouseup', placeholderRemover);
this.contain.removeEventListener('keydown', keyDownHandler);
this.contain.removeEventListener('touchstart', placeholderRemover);
this.contain.removeEventListener('focus', placeholderRemover);
this.contain.removeEventListener('blur', placeholderRemover);
this.contain.removeEventListener('paste', delayedPlaceholderRemover);
this.contain.removeEventListener('drop', delayedPlaceholderRemover);
this.contain.removeEventListener('beforepaste', delayedPlaceholderRemover);
// If user inserted sth it is in the placeholder and sgould be unwrapped and stripped of invisible whitespace hack
// Otherwise the wrapper can just be removed
if (caretPlaceholder && caretPlaceholder.parentNode) {
caretPlaceholder.innerHTML = caretPlaceholder.innerHTML.replace(wysihtml.INVISIBLE_SPACE_REG_EXP, "");
if ((/[^\s]+/).test(caretPlaceholder.innerHTML)) {
lastChild = caretPlaceholder.lastChild;
wysihtml.dom.unwrap(caretPlaceholder);
this.setAfter(lastChild);
} else {
caretPlaceholder.parentNode.removeChild(caretPlaceholder);
}
}
}).bind(this),
delayedPlaceholderRemover = function (event) {
if (caretPlaceholder && caretPlaceholder.parentNode) {
setTimeout(placeholderRemover, 0);
}
},
keyDownHandler = function(event) {
if (event.which !== 8 && event.which !== 91 && event.which !== 17 && (event.which !== 86 || (!event.ctrlKey && !event.metaKey))) {
placeholderRemover();
}
};
caretPlaceholder.className = '_wysihtml-temp-caret-fix';
caretPlaceholder.style.position = 'absolute';
caretPlaceholder.style.display = 'block';
caretPlaceholder.style.minWidth = '1px';
caretPlaceholder.style.zIndex = '99999';
caretPlaceholder.appendChild(caretPlaceholderText);
node.parentNode.insertBefore(caretPlaceholder, node.nextSibling);
this.setBefore(caretPlaceholderText);
// Remove the caret fix on any of the following events (some are delayed as content change happens after event)
this.contain.addEventListener('mouseup', placeholderRemover);
this.contain.addEventListener('keydown', keyDownHandler);
this.contain.addEventListener('touchstart', placeholderRemover);
this.contain.addEventListener('focus', placeholderRemover);
this.contain.addEventListener('blur', placeholderRemover);
this.contain.addEventListener('paste', delayedPlaceholderRemover);
this.contain.addEventListener('drop', delayedPlaceholderRemover);
this.contain.addEventListener('beforepaste', delayedPlaceholderRemover);
return caretPlaceholder;
},
/**
* Set the caret after the given node
*
* @param {Object} node The element or text node where to position the caret in front of
* @example
* selection.setBefore(myElement);
* callback is an optional parameter accepting a function to execute when selection ahs been set
*/
setAfter: function(node, notVisual, callback) {
var win = this.win,
range = rangy.createRange(this.doc),
fixWebkitSelection = function() {
// Webkit fails to add selection if there are no textnodes in that region
// (like an uneditable container at the end of content).
var parent = node.parentNode,
lastSibling = parent ? parent.childNodes[parent.childNodes.length - 1] : null;
if (!sel || (lastSibling === node && node.nodeType === 1 && win.getComputedStyle(node).display === "block")) {
if (notVisual) {
// If setAfter is used as internal between actions, self-removing caretPlaceholder has simpler implementation
// and remove itself in call stack end instead on user interaction
var caretPlaceholder = this.doc.createTextNode(wysihtml.INVISIBLE_SPACE);
node.parentNode.insertBefore(caretPlaceholder, node.nextSibling);
this.selectNode(caretPlaceholder);
setTimeout(function() {
if (caretPlaceholder && caretPlaceholder.parentNode) {
caretPlaceholder.parentNode.removeChild(caretPlaceholder);
}
}, 0);
} else {
this.createTemporaryCaretSpaceAfter(node);
}
}
}.bind(this),
sel;
range.setStartAfter(node);
range.setEndAfter(node);
// In IE contenteditable must be focused before we can set selection
// thus setting the focus if activeElement is not this composer
if (!document.activeElement || document.activeElement !== this.composer.element) {
var scrollPos = this.composer.getScrollPos();
this.composer.element.focus();
this.composer.setScrollPos(scrollPos);
setTimeout(function() {
sel = this.setSelection(range);
fixWebkitSelection();
if (callback) {
callback(sel);
}
}.bind(this), 0);
} else {
sel = this.setSelection(range);
fixWebkitSelection();
if (callback) {
callback(sel);
}
}
},
/**
* Ability to select/mark nodes
*
* @param {Element} node The node/element to select
* @example
* selection.selectNode(document.getElementById("my-image"));
*/
selectNode: function(node, avoidInvisibleSpace) {
var range = rangy.createRange(this.doc),
isElement = node.nodeType === wysihtml.ELEMENT_NODE,
canHaveHTML = "canHaveHTML" in node ? node.canHaveHTML : (node.nodeName !== "IMG"),
content = isElement ? node.innerHTML : node.data,
isEmpty = (content === "" || content === wysihtml.INVISIBLE_SPACE),
displayStyle = dom.getStyle("display").from(node),
isBlockElement = (displayStyle === "block" || displayStyle === "list-item");
if (isEmpty && isElement && canHaveHTML && !avoidInvisibleSpace) {
// Make sure that caret is visible in node by inserting a zero width no breaking space
try { node.innerHTML = wysihtml.INVISIBLE_SPACE; } catch(e) {}
}
if (canHaveHTML) {
range.selectNodeContents(node);
} else {
range.selectNode(node);
}
if (canHaveHTML && isEmpty && isElement) {
range.collapse(isBlockElement);
} else if (canHaveHTML && isEmpty) {
range.setStartAfter(node);
range.setEndAfter(node);
}
this.setSelection(range);
},
/**
* Get the node which contains the selection
*
* @param {Boolean} [controlRange] (only IE) Whether it should return the selected ControlRange element when the selection type is a "ControlRange"
* @return {Object} The node that contains the caret
* @example
* var nodeThatContainsCaret = selection.getSelectedNode();
*/
getSelectedNode: function(controlRange) {
var selection,
range;
if (controlRange && this.doc.selection && this.doc.selection.type === "Control") {
range = this.doc.selection.createRange();
if (range && range.length) {
return range.item(0);
}
}
selection = this.getSelection(this.doc);
if (selection.focusNode === selection.anchorNode) {
return selection.focusNode;
} else {
range = this.getRange(this.doc);
return range ? range.commonAncestorContainer : this.doc.body;
}
},
fixSelBorders: function() {
var range = this.getRange();
expandRangeToSurround(range);
this.setSelection(range);
},
getSelectedOwnNodes: function(controlRange) {
var selection,
ranges = this.getOwnRanges(),
ownNodes = [];
for (var i = 0, maxi = ranges.length; i < maxi; i++) {
ownNodes.push(ranges[i].commonAncestorContainer || this.doc.body);
}
return ownNodes;
},
findNodesInSelection: function(nodeTypes) {
var ranges = this.getOwnRanges(),
nodes = [], curNodes;
for (var i = 0, maxi = ranges.length; i < maxi; i++) {
curNodes = ranges[i].getNodes([1], function(node) {
return wysihtml.lang.array(nodeTypes).contains(node.nodeName);
});
nodes = nodes.concat(curNodes);
}
return nodes;
},
filterElements: function(filter) {
var ranges = this.getOwnRanges(),
nodes = [], curNodes;
for (var i = 0, maxi = ranges.length; i < maxi; i++) {
curNodes = ranges[i].getNodes([1], function(element){
return filter(element, ranges[i]);
});
nodes = nodes.concat(curNodes);
}
return nodes;
},
containsUneditable: function() {
var uneditables = this.getOwnUneditables(),
selection = this.getSelection();
for (var i = 0, maxi = uneditables.length; i < maxi; i++) {
if (selection.containsNode(uneditables[i])) {
return true;
}
}
return false;
},
// Deletes selection contents making sure uneditables/unselectables are not partially deleted
// Triggers wysihtml:uneditable:delete custom event on all deleted uneditables if customevents suppoorted
deleteContents: function() {
var range = this.getRange();
this.deleteRangeContents(range);
this.setSelection(range);
},
// Makes sure all uneditable sare notified before deleting contents
deleteRangeContents: function (range) {
var startParent, endParent, uneditables, ev;
if (this.unselectableClass) {
if ((startParent = wysihtml.dom.getParentElement(range.startContainer, { query: "." + this.unselectableClass }, false, this.contain))) {
range.setStartBefore(startParent);
}
if ((endParent = wysihtml.dom.getParentElement(range.endContainer, { query: "." + this.unselectableClass }, false, this.contain))) {
range.setEndAfter(endParent);
}
// If customevents present notify uneditable elements of being deleted
uneditables = range.getNodes([1], (function (node) {
return wysihtml.dom.hasClass(node, this.unselectableClass);
}).bind(this));
for (var i = uneditables.length; i--;) {
try {
ev = new CustomEvent("wysihtml:uneditable:delete");
uneditables[i].dispatchEvent(ev);
} catch (err) {}
}
}
range.deleteContents();
},
getCaretNode: function () {
var selection = this.getSelection();
return (selection && selection.anchorNode) ? getRangeNode(selection.anchorNode, selection.anchorOffset) : null;
},
getPreviousNode: function(node, ignoreEmpty) {
var displayStyle;
if (!node) {
var selection = this.getSelection();
node = (selection && selection.anchorNode) ? getRangeNode(selection.anchorNode, selection.anchorOffset) : null;
}
if (node === this.contain) {
return false;
}
var ret = node.previousSibling,
parent;
if (ret === this.contain) {
return false;
}
if (ret && ret.nodeType !== 3 && ret.nodeType !== 1) {
// do not count comments and other node types
ret = this.getPreviousNode(ret, ignoreEmpty);
} else if (ret && ret.nodeType === 3 && (/^\s*$/).test(ret.textContent)) {
// do not count empty textnodes as previous nodes
ret = this.getPreviousNode(ret, ignoreEmpty);
} else if (ignoreEmpty && ret && ret.nodeType === 1) {
// Do not count empty nodes if param set.
// Contenteditable tends to bypass and delete these silently when deleting with caret when element is inline-like
displayStyle = wysihtml.dom.getStyle("display").from(ret);
if (
!wysihtml.lang.array(["BR", "HR", "IMG"]).contains(ret.nodeName) &&
!wysihtml.lang.array(["block", "inline-block", "flex", "list-item", "table"]).contains(displayStyle) &&
(/^[\s]*$/).test(ret.innerHTML)
) {
ret = this.getPreviousNode(ret, ignoreEmpty);
}
} else if (!ret && node !== this.contain) {
parent = node.parentNode;
if (parent !== this.contain) {
ret = this.getPreviousNode(parent, ignoreEmpty);
}
}
return (ret !== this.contain) ? ret : false;
},
// Gather info about caret location (caret node, previous and next node)
getNodesNearCaret: function() {
if (!this.isCollapsed()) {
throw "Selection must be caret when using selection.getNodesNearCaret()";
}
var r = this.getOwnRanges(),
caretNode, prevNode, nextNode, offset;
if (r && r.length > 0) {
if (r[0].startContainer.nodeType === 1) {
caretNode = r[0].startContainer.childNodes[r[0].startOffset - 1];
if (!caretNode && r[0].startOffset === 0) {
// Is first position before all nodes
nextNode = r[0].startContainer.childNodes[0];
} else if (caretNode) {
prevNode = caretNode.previousSibling;
nextNode = caretNode.nextSibling;
}
} else {
if (r[0].startOffset === 0 && r[0].startContainer.previousSibling) {
caretNode = r[0].startContainer.previousSibling;
if (caretNode.nodeType === 3) {
offset = caretNode.data.length;
}
} else {
caretNode = r[0].startContainer;
offset = r[0].startOffset;
}
prevNode = caretNode.previousSibling;
nextNode = caretNode.nextSibling;
}
return {
"caretNode": caretNode,
"prevNode": prevNode,
"nextNode": nextNode,
"textOffset": offset
};
}
return null;
},
getSelectionParentsByTag: function(tagName) {
var nodes = this.getSelectedOwnNodes(),
curEl, parents = [];
for (var i = 0, maxi = nodes.length; i < maxi; i++) {
curEl = (nodes[i].nodeName && nodes[i].nodeName === 'LI') ? nodes[i] : wysihtml.dom.getParentElement(nodes[i], { query: 'li'}, false, this.contain);
if (curEl) {
parents.push(curEl);
}
}
return (parents.length) ? parents : null;
},
getRangeToNodeEnd: function() {
if (this.isCollapsed()) {
var range = this.getRange(),
sNode, pos, lastR;
if (range) {
sNode = range.startContainer;
pos = range.startOffset;
lastR = rangy.createRange(this.doc);
lastR.selectNodeContents(sNode);
lastR.setStart(sNode, pos);
return lastR;
}
}
},
getRangeToNodeBeginning: function() {
if (this.isCollapsed()) {
var range = this.getRange(),
sNode = range.startContainer,
pos = range.startOffset,
lastR = rangy.createRange(this.doc);
lastR.selectNodeContents(sNode);
lastR.setEnd(sNode, pos);
return lastR;
}
},
// This function returns if caret is last in a node (no textual visible content follows)
caretIsInTheEndOfNode: function(ignoreIfSpaceIsBeforeCaret) {
var r = rangy.createRange(this.doc),
s = this.getSelection(),
rangeToNodeEnd = this.getRangeToNodeEnd(),
endc, endtxt, beginc, begintxt;
if (rangeToNodeEnd) {
endc = rangeToNodeEnd.cloneContents();
endtxt = endc.textContent;
if ((/^\s*$/).test(endtxt)) {
if (ignoreIfSpaceIsBeforeCaret) {
beginc = this.getRangeToNodeBeginning().cloneContents();
begintxt = beginc.textContent;
return !(/[\u00A0 ][\s\uFEFF]*$/).test(begintxt);
} else {
return true;
}
} else {
return false;
}
} else {
return false;
}
},
caretIsFirstInSelection: function(includeLineBreaks) {
var r = rangy.createRange(this.doc),
s = this.getSelection(),
range = this.getRange(),
startNode = getRangeNode(range.startContainer, range.startOffset);
if (startNode) {
if (startNode.nodeType === wysihtml.TEXT_NODE) {
if (!startNode.parentNode) {
return false;
}
if (!this.isCollapsed() || (startNode.parentNode.firstChild !== startNode && !wysihtml.dom.domNode(startNode.previousSibling).is.block())) {
return false;
}
var ws = this.win.getComputedStyle(startNode.parentNode).whiteSpace;
return (ws === "pre" || ws === "pre-wrap") ? range.startOffset === 0 : (/^\s*$/).test(startNode.data.substr(0,range.startOffset));
} else if (includeLineBreaks && wysihtml.dom.domNode(startNode).is.lineBreak()) {
return true;
} else {
r.selectNodeContents(this.getRange().commonAncestorContainer);
r.collapse(true);
return (this.isCollapsed() && (r.startContainer === s.anchorNode || r.endContainer === s.anchorNode) && r.startOffset === s.anchorOffset);
}
}
},
caretIsInTheBeginnig: function(ofNode) {
var selection = this.getSelection(),
node = selection.anchorNode,
offset = selection.anchorOffset;
if (ofNode && node) {
return (offset === 0 && (node.nodeName && node.nodeName === ofNode.toUpperCase() || wysihtml.dom.getParentElement(node.parentNode, { query: ofNode }, 1)));
} else if (node) {
return (offset === 0 && !this.getPreviousNode(node, true));
}
},
// Returns object describing node/text before selection
// If includePrevLeaves is true returns also previous last leaf child if selection is in the beginning of current node
getBeforeSelection: function(includePrevLeaves) {
var sel = this.getSelection(),
startNode = (sel.isBackwards()) ? sel.focusNode : sel.anchorNode,
startOffset = (sel.isBackwards()) ? sel.focusOffset : sel.anchorOffset,
rng = this.createRange(), endNode, inTmpCaret;
// If start is textnode and all is whitespace before caret. Set start offset to 0
if (startNode && startNode.nodeType === 3 && (/^\s*$/).test(startNode.data.slice(0, startOffset))) {
startOffset = 0;
}
// Escape temproray helper nodes if selection in them
inTmpCaret = wysihtml.dom.getParentElement(startNode, { query: '._wysihtml-temp-caret-fix' }, 1);
if (inTmpCaret) {
startNode = inTmpCaret.parentNode;
startOffset = Array.prototype.indexOf.call(startNode.childNodes, inTmpCaret);
}
if (startNode) {
if (startOffset > 0) {
if (startNode.nodeType === 3) {
rng.setStart(startNode, 0);
rng.setEnd(startNode, startOffset);
return {
type: "text",
range: rng,
offset : startOffset,
node: startNode
};
} else {
rng.setStartBefore(startNode.childNodes[0]);
endNode = startNode.childNodes[startOffset - 1];
rng.setEndAfter(endNode);
return {
type: "element",
range: rng,
offset : startOffset,
node: endNode
};
}
} else {
rng.setStartAndEnd(startNode, 0);
if (includePrevLeaves) {
var prevNode = this.getPreviousNode(startNode, true),
prevLeaf = null;
if(prevNode) {
if (prevNode.nodeType === 1 && wysihtml.dom.hasClass(prevNode, this.unselectableClass)) {
prevLeaf = prevNode;
} else {
prevLeaf = wysihtml.dom.domNode(prevNode).lastLeafNode();
}
}
if (prevLeaf) {
return {
type: "leafnode",
range: rng,
offset : startOffset,
node: prevLeaf
};
}
}
return {
type: "none",
range: rng,
offset : startOffset,
node: startNode
};
}
}
return null;
},
// TODO: Figure out a method from following 2 that would work universally
executeAndRestoreRangy: function(method, restoreScrollPosition) {
var sel = rangy.saveSelection(this.win);
if (!sel) {
method();
} else {
try {
method();
} catch(e) {
setTimeout(function() { throw e; }, 0);
}
}
rangy.restoreSelection(sel);
},
// TODO: has problems in chrome 12. investigate block level and uneditable area inbetween
executeAndRestore: function(method, restoreScrollPosition) {
var body = this.doc.body,
oldScrollTop = restoreScrollPosition && body.scrollTop,
oldScrollLeft = restoreScrollPosition && body.scrollLeft,
className = "_wysihtml-temp-placeholder",
placeholderHtml = '<span class="' + className + '">' + wysihtml.INVISIBLE_SPACE + '</span>',
range = this.getRange(true),
caretPlaceholder,
newCaretPlaceholder,
nextSibling, prevSibling,
node, node2, range2,
newRange;
// Nothing selected, execute and say goodbye
if (!range) {
method(body, body);
return;
}
if (!range.collapsed) {
range2 = range.cloneRange();
node2 = range2.createContextualFragment(placeholderHtml);
range2.collapse(false);
range2.insertNode(node2);
range2.detach();
}
node = range.createContextualFragment(placeholderHtml);
range.insertNode(node);
if (node2) {
caretPlaceholder = this.contain.querySelectorAll("." + className);
range.setStartBefore(caretPlaceholder[0]);
range.setEndAfter(caretPlaceholder[caretPlaceholder.length -1]);
}
this.setSelection(range);
// Make sure that a potential error doesn't cause our placeholder element to be left as a placeholder
try {
method(range.startContainer, range.endContainer);
} catch(e) {
setTimeout(function() { throw e; }, 0);
}
caretPlaceholder = this.contain.querySelectorAll("." + className);
if (caretPlaceholder && caretPlaceholder.length) {
newRange = rangy.createRange(this.doc);
nextSibling = caretPlaceholder[0].nextSibling;
if (caretPlaceholder.length > 1) {
prevSibling = caretPlaceholder[caretPlaceholder.length -1].previousSibling;
}
if (prevSibling && nextSibling) {
newRange.setStartBefore(nextSibling);
newRange.setEndAfter(prevSibling);
} else {
newCaretPlaceholder = this.doc.createTextNode(wysihtml.INVISIBLE_SPACE);
dom.insert(newCaretPlaceholder).after(caretPlaceholder[0]);
newRange.setStartBefore(newCaretPlaceholder);
newRange.setEndAfter(newCaretPlaceholder);
}
this.setSelection(newRange);
for (var i = caretPlaceholder.length; i--;) {
caretPlaceholder[i].parentNode.removeChild(caretPlaceholder[i]);
}
} else {
// fallback for when all hell breaks loose
this.contain.focus();
}
if (restoreScrollPosition) {
body.scrollTop = oldScrollTop;
body.scrollLeft = oldScrollLeft;
}
// Remove it again, just to make sure that the placeholder is definitely out of the dom tree
try {
caretPlaceholder.parentNode.removeChild(caretPlaceholder);
} catch(e2) {}
},
set: function(node, offset) {
var newRange = rangy.createRange(this.doc);
newRange.setStart(node, offset || 0);
this.setSelection(newRange);
},
/**
* Insert html at the caret or selection position and move the cursor after the inserted html
* Replaces selection content if present
*
* @param {String} html HTML string to insert
* @example
* selection.insertHTML("<p>foobar</p>");
*/
insertHTML: function(html) {
var range = this.getRange(),
node = this.doc.createElement('DIV'),
fragment = this.doc.createDocumentFragment(),
lastChild, lastEditorElement;
if (range) {
range.deleteContents();
node.innerHTML = html;
lastChild = node.lastChild;
while (node.firstChild) {
fragment.appendChild(node.firstChild);
}
range.insertNode(fragment);
lastEditorElement = this.contain.lastChild;
while (lastEditorElement && lastEditorElement.nodeType === 3 && lastEditorElement.previousSibling && (/^\s*$/).test(lastEditorElement.data)) {
lastEditorElement = lastEditorElement.previousSibling;
}
if (lastChild) {
// fixes some pad cases mostly on webkit where last nr is needed
if (lastEditorElement && lastChild === lastEditorElement && lastChild.nodeType === 1) {
this.contain.appendChild(this.doc.createElement('br'));
}
this.setAfter(lastChild);
}
}
},
/**
* Insert a node at the caret position and move the cursor behind it
*
* @param {Object} node HTML string to insert
* @example
* selection.insertNode(document.createTextNode("foobar"));
*/
insertNode: function(node) {
var range = this.getRange();
if (range) {
range.deleteContents();
range.insertNode(node);
}
},
canAppendChild: function (node) {
var anchorNode, anchorNodeTagNameLower,
voidElements = ["area", "base", "br", "col", "command", "embed", "hr", "img", "input", "keygen", "link", "meta", "param", "source", "track", "wbr"],
range = this.getRange();
anchorNode = node || range.startContainer;
if (anchorNode) {
anchorNodeTagNameLower = (anchorNode.tagName || anchorNode.nodeName).toLowerCase();
}
return voidElements.indexOf(anchorNodeTagNameLower) === -1;
},
splitElementAtCaret: function (element, insertNode) {
var sel = this.getSelection(),
range, contentAfterRangeStart,
firstChild, lastChild, childNodes;
if (sel.rangeCount > 0) {
range = sel.getRangeAt(0).cloneRange(); // Create a copy of the selection range to work with
range.setEndAfter(element); // Place the end of the range after the element
contentAfterRangeStart = range.extractContents(); // Extract the contents of the element after the caret into a fragment
childNodes = contentAfterRangeStart.childNodes;
// Empty elements are cleaned up from extracted content
for (var i = childNodes.length; i --;) {
if (!wysihtml.dom.domNode(childNodes[i]).is.visible()) {
contentAfterRangeStart.removeChild(childNodes[i]);
}
}
element.parentNode.insertBefore(contentAfterRangeStart, element.nextSibling);
if (insertNode) {
firstChild = insertNode.firstChild || insertNode;
lastChild = insertNode.lastChild || insertNode;
element.parentNode.insertBefore(insertNode, element.nextSibling);
// Select inserted node contents
if (firstChild && lastChild) {
range.setStartBefore(firstChild);
range.setEndAfter(lastChild);
this.setSelection(range);
}
} else {
range.setStartAfter(element);
range.setEndAfter(element);
}
if (!wysihtml.dom.domNode(element).is.visible()) {
if (wysihtml.dom.getTextContent(element) === '') {
element.parentNode.removeChild(element);
} else {
element.parentNode.replaceChild(this.doc.createTextNode(" "), element);
}
}
}
},
/**
* Wraps current selection with the given node
*
* @param {Object} node The node to surround the selected elements with
*/
surround: function(nodeOptions) {
var ranges = this.getOwnRanges(),
node, nodes = [];
if (ranges.length == 0) {
return nodes;
}
for (var i = ranges.length; i--;) {
node = this.doc.createElement(nodeOptions.nodeName);
nodes.push(node);
if (nodeOptions.className) {
node.className = nodeOptions.className;
}
if (nodeOptions.cssStyle) {
node.setAttribute('style', nodeOptions.cssStyle);
}
try {
// This only works when the range boundaries are not overlapping other elements
ranges[i].surroundContents(node);
this.selectNode(node);
} catch(e) {
// fallback
node.appendChild(ranges[i].extractContents());
ranges[i].insertNode(node);
}
}
return nodes;
},
/**
* Scroll the current caret position into the view
* FIXME: This is a bit hacky, there might be a smarter way of doing this
*
* @example
* selection.scrollIntoView();
*/
scrollIntoView: function() {
var doc = this.doc,
tolerance = 5, // px
hasScrollBars = doc.documentElement.scrollHeight > doc.documentElement.offsetHeight,
tempElement = doc._wysihtmlScrollIntoViewElement = doc._wysihtmlScrollIntoViewElement || (function() {
var element = doc.createElement("span");
// The element needs content in order to be able to calculate it's position properly
element.innerHTML = wysihtml.INVISIBLE_SPACE;
return element;
})(),
offsetTop;
if (hasScrollBars) {
this.insertNode(tempElement);
offsetTop = _getCumulativeOffsetTop(tempElement);
tempElement.parentNode.removeChild(tempElement);
if (offsetTop >= (doc.body.scrollTop + doc.documentElement.offsetHeight - tolerance)) {
doc.body.scrollTop = offsetTop;
}
}
},
/**