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/**
* EnterKey.js
*
* Copyright, Moxiecode Systems AB
* Released under LGPL License.
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* Contains logic for handling the enter key to split/generate block elements.
*/
define("tinymce/EnterKey", [
"tinymce/dom/TreeWalker",
"tinymce/dom/RangeUtils",
"tinymce/Env"
], function(TreeWalker, RangeUtils, Env) {
var isIE = Env.ie && Env.ie < 11;
return function(editor) {
var dom = editor.dom, selection = editor.selection, settings = editor.settings;
var undoManager = editor.undoManager, schema = editor.schema, nonEmptyElementsMap = schema.getNonEmptyElements();
function handleEnterKey(evt) {
var rng, tmpRng, editableRoot, container, offset, parentBlock, documentMode, shiftKey,
newBlock, fragment, containerBlock, parentBlockName, containerBlockName, newBlockName, isAfterLastNodeInContainer;
// Returns true if the block can be split into two blocks or not
function canSplitBlock(node) {
return node &&
dom.isBlock(node) &&
!/^(TD|TH|CAPTION|FORM)$/.test(node.nodeName) &&
!/^(fixed|absolute)/i.test(node.style.position) &&
dom.getContentEditable(node) !== "true";
}
// Renders empty block on IE
function renderBlockOnIE(block) {
var oldRng;
if (dom.isBlock(block)) {
oldRng = selection.getRng();
block.appendChild(dom.create('span', null, '\u00a0'));
selection.select(block);
block.lastChild.outerHTML = '';
selection.setRng(oldRng);
}
}
// Remove the first empty inline element of the block so this: <p><b><em></em></b>x</p> becomes this: <p>x</p>
function trimInlineElementsOnLeftSideOfBlock(block) {
var node = block, firstChilds = [], i;
if (!node) {
return;
}
// Find inner most first child ex: <p><i><b>*</b></i></p>
while ((node = node.firstChild)) {
if (dom.isBlock(node)) {
return;
}
if (node.nodeType == 1 && !nonEmptyElementsMap[node.nodeName.toLowerCase()]) {
firstChilds.push(node);
}
}
i = firstChilds.length;
while (i--) {
node = firstChilds[i];
if (!node.hasChildNodes() || (node.firstChild == node.lastChild && node.firstChild.nodeValue === '')) {
dom.remove(node);
} else {
// Remove <a> </a> see #5381
if (node.nodeName == "A" && (node.innerText || node.textContent) === ' ') {
dom.remove(node);
}
}
}
}
// Moves the caret to a suitable position within the root for example in the first non
// pure whitespace text node or before an image
function moveToCaretPosition(root) {
var walker, node, rng, lastNode = root, tempElm;
function firstNonWhiteSpaceNodeSibling(node) {
while (node) {
if (node.nodeType == 1 || (node.nodeType == 3 && node.data && /[\r\n\s]/.test(node.data))) {
return node;
}
node = node.nextSibling;
}
}
if (!root) {
return;
}
// Old IE versions doesn't properly render blocks with br elements in them
// For example <p><br></p> wont be rendered correctly in a contentEditable area
// until you remove the br producing <p></p>
if (Env.ie && Env.ie < 9 && parentBlock && parentBlock.firstChild) {
if (parentBlock.firstChild == parentBlock.lastChild && parentBlock.firstChild.tagName == 'BR') {
dom.remove(parentBlock.firstChild);
}
}
if (/^(LI|DT|DD)$/.test(root.nodeName)) {
var firstChild = firstNonWhiteSpaceNodeSibling(root.firstChild);
if (firstChild && /^(UL|OL|DL)$/.test(firstChild.nodeName)) {
root.insertBefore(dom.doc.createTextNode('\u00a0'), root.firstChild);
}
}
rng = dom.createRng();
// Normalize whitespace to remove empty text nodes. Fix for: #6904
// Gecko will be able to place the caret in empty text nodes but it won't render propery
// Older IE versions will sometimes crash so for now ignore all IE versions
if (!Env.ie) {
root.normalize();
}
if (root.hasChildNodes()) {
walker = new TreeWalker(root, root);
while ((node = walker.current())) {
if (node.nodeType == 3) {
rng.setStart(node, 0);
rng.setEnd(node, 0);
break;
}
if (nonEmptyElementsMap[node.nodeName.toLowerCase()]) {
rng.setStartBefore(node);
rng.setEndBefore(node);
break;
}
lastNode = node;
node = walker.next();
}
if (!node) {
rng.setStart(lastNode, 0);
rng.setEnd(lastNode, 0);
}
} else {
if (root.nodeName == 'BR') {
if (root.nextSibling && dom.isBlock(root.nextSibling)) {
// Trick on older IE versions to render the caret before the BR between two lists
if (!documentMode || documentMode < 9) {
tempElm = dom.create('br');
root.parentNode.insertBefore(tempElm, root);
}
rng.setStartBefore(root);
rng.setEndBefore(root);
} else {
rng.setStartAfter(root);
rng.setEndAfter(root);
}
} else {
rng.setStart(root, 0);
rng.setEnd(root, 0);
}
}
selection.setRng(rng);
// Remove tempElm created for old IE:s
dom.remove(tempElm);
selection.scrollIntoView(root);
}
function setForcedBlockAttrs(node) {
var forcedRootBlockName = settings.forced_root_block;
if (forcedRootBlockName && forcedRootBlockName.toLowerCase() === node.tagName.toLowerCase()) {
dom.setAttribs(node, settings.forced_root_block_attrs);
}
}
// Creates a new block element by cloning the current one or creating a new one if the name is specified
// This function will also copy any text formatting from the parent block and add it to the new one
function createNewBlock(name) {
var node = container, block, clonedNode, caretNode, textInlineElements = schema.getTextInlineElements();
if (name || parentBlockName == "TABLE") {
block = dom.create(name || newBlockName);
setForcedBlockAttrs(block);
} else {
block = parentBlock.cloneNode(false);
}
caretNode = block;
// Clone any parent styles
if (settings.keep_styles !== false) {
do {
if (textInlineElements[node.nodeName]) {
// Never clone a caret containers
if (node.id == '_mce_caret') {
continue;
}
clonedNode = node.cloneNode(false);
dom.setAttrib(clonedNode, 'id', ''); // Remove ID since it needs to be document unique
if (block.hasChildNodes()) {
clonedNode.appendChild(block.firstChild);
block.appendChild(clonedNode);
} else {
caretNode = clonedNode;
block.appendChild(clonedNode);
}
}
} while ((node = node.parentNode));
}
// BR is needed in empty blocks on non IE browsers
if (!isIE) {
caretNode.innerHTML = '<br data-mce-bogus="1">';
}
return block;
}
// Returns true/false if the caret is at the start/end of the parent block element
function isCaretAtStartOrEndOfBlock(start) {
var walker, node, name;
// Caret is in the middle of a text node like "a|b"
if (container.nodeType == 3 && (start ? offset > 0 : offset < container.nodeValue.length)) {
return false;
}
// If after the last element in block node edge case for #5091
if (container.parentNode == parentBlock && isAfterLastNodeInContainer && !start) {
return true;
}
// If the caret if before the first element in parentBlock
if (start && container.nodeType == 1 && container == parentBlock.firstChild) {
return true;
}
// Caret can be before/after a table
if (container.nodeName === "TABLE" || (container.previousSibling && container.previousSibling.nodeName == "TABLE")) {
return (isAfterLastNodeInContainer && !start) || (!isAfterLastNodeInContainer && start);
}
// Walk the DOM and look for text nodes or non empty elements
walker = new TreeWalker(container, parentBlock);
// If caret is in beginning or end of a text block then jump to the next/previous node
if (container.nodeType == 3) {
if (start && offset === 0) {
walker.prev();
} else if (!start && offset == container.nodeValue.length) {
walker.next();
}
}
while ((node = walker.current())) {
if (node.nodeType === 1) {
// Ignore bogus elements
if (!node.getAttribute('data-mce-bogus')) {
// Keep empty elements like <img /> <input /> but not trailing br:s like <p>text|<br></p>
name = node.nodeName.toLowerCase();
if (nonEmptyElementsMap[name] && name !== 'br') {
return false;
}
}
} else if (node.nodeType === 3 && !/^[ \t\r\n]*$/.test(node.nodeValue)) {
return false;
}
if (start) {
walker.prev();
} else {
walker.next();
}
}
return true;
}
// Wraps any text nodes or inline elements in the specified forced root block name
function wrapSelfAndSiblingsInDefaultBlock(container, offset) {
var newBlock, parentBlock, startNode, node, next, rootBlockName, blockName = newBlockName || 'P';
// Not in a block element or in a table cell or caption
parentBlock = dom.getParent(container, dom.isBlock);
rootBlockName = editor.getBody().nodeName.toLowerCase();
if (!parentBlock || !canSplitBlock(parentBlock)) {
parentBlock = parentBlock || editableRoot;
if (!parentBlock.hasChildNodes()) {
newBlock = dom.create(blockName);
setForcedBlockAttrs(newBlock);
parentBlock.appendChild(newBlock);
rng.setStart(newBlock, 0);
rng.setEnd(newBlock, 0);
return newBlock;
}
// Find parent that is the first child of parentBlock
node = container;
while (node.parentNode != parentBlock) {
node = node.parentNode;
}
// Loop left to find start node start wrapping at
while (node && !dom.isBlock(node)) {
startNode = node;
node = node.previousSibling;
}
if (startNode && schema.isValidChild(rootBlockName, blockName.toLowerCase())) {
newBlock = dom.create(blockName);
setForcedBlockAttrs(newBlock);
startNode.parentNode.insertBefore(newBlock, startNode);
// Start wrapping until we hit a block
node = startNode;
while (node && !dom.isBlock(node)) {
next = node.nextSibling;
newBlock.appendChild(node);
node = next;
}
// Restore range to it's past location
rng.setStart(container, offset);
rng.setEnd(container, offset);
}
}
return container;
}
// Inserts a block or br before/after or in the middle of a split list of the LI is empty
function handleEmptyListItem() {
function isFirstOrLastLi(first) {
var node = containerBlock[first ? 'firstChild' : 'lastChild'];
// Find first/last element since there might be whitespace there
while (node) {
if (node.nodeType == 1) {
break;
}
node = node[first ? 'nextSibling' : 'previousSibling'];
}
return node === parentBlock;
}
function getContainerBlock() {
var containerBlockParent = containerBlock.parentNode;
if (/^(LI|DT|DD)$/.test(containerBlockParent.nodeName)) {
return containerBlockParent;
}
return containerBlock;
}
// Check if we are in an nested list
var containerBlockParentName = containerBlock.parentNode.nodeName;
if (/^(OL|UL|LI)$/.test(containerBlockParentName)) {
newBlockName = 'LI';
}
newBlock = newBlockName ? createNewBlock(newBlockName) : dom.create('BR');
if (isFirstOrLastLi(true) && isFirstOrLastLi()) {
if (containerBlockParentName == 'LI') {
// Nested list is inside a LI
dom.insertAfter(newBlock, getContainerBlock());
} else {
// Is first and last list item then replace the OL/UL with a text block
dom.replace(newBlock, containerBlock);
}
} else if (isFirstOrLastLi(true)) {
if (containerBlockParentName == 'LI') {
// List nested in an LI then move the list to a new sibling LI
dom.insertAfter(newBlock, getContainerBlock());
newBlock.appendChild(dom.doc.createTextNode(' ')); // Needed for IE so the caret can be placed
newBlock.appendChild(containerBlock);
} else {
// First LI in list then remove LI and add text block before list
containerBlock.parentNode.insertBefore(newBlock, containerBlock);
}
} else if (isFirstOrLastLi()) {
// Last LI in list then remove LI and add text block after list
dom.insertAfter(newBlock, getContainerBlock());
renderBlockOnIE(newBlock);
} else {
// Middle LI in list the split the list and insert a text block in the middle
// Extract after fragment and insert it after the current block
containerBlock = getContainerBlock();
tmpRng = rng.cloneRange();
tmpRng.setStartAfter(parentBlock);
tmpRng.setEndAfter(containerBlock);
fragment = tmpRng.extractContents();
if (newBlockName == 'LI' && fragment.firstChild.nodeName == 'LI') {
newBlock = fragment.firstChild;
dom.insertAfter(fragment, containerBlock);
} else {
dom.insertAfter(fragment, containerBlock);
dom.insertAfter(newBlock, containerBlock);
}
}
dom.remove(parentBlock);
moveToCaretPosition(newBlock);
undoManager.add();
}
// Inserts a BR element if the forced_root_block option is set to false or empty string
function insertBr() {
editor.execCommand("InsertLineBreak", false, evt);
}
// Trims any linebreaks at the beginning of node user for example when pressing enter in a PRE element
function trimLeadingLineBreaks(node) {
do {
if (node.nodeType === 3) {
node.nodeValue = node.nodeValue.replace(/^[\r\n]+/, '');
}
node = node.firstChild;
} while (node);
}
function getEditableRoot(node) {
var root = dom.getRoot(), parent, editableRoot;
// Get all parents until we hit a non editable parent or the root
parent = node;
while (parent !== root && dom.getContentEditable(parent) !== "false") {
if (dom.getContentEditable(parent) === "true") {
editableRoot = parent;
}
parent = parent.parentNode;
}
return parent !== root ? editableRoot : root;
}
// Adds a BR at the end of blocks that only contains an IMG or INPUT since
// these might be floated and then they won't expand the block
function addBrToBlockIfNeeded(block) {
var lastChild;
// IE will render the blocks correctly other browsers needs a BR
if (!isIE) {
block.normalize(); // Remove empty text nodes that got left behind by the extract
// Check if the block is empty or contains a floated last child
lastChild = block.lastChild;
if (!lastChild || (/^(left|right)$/gi.test(dom.getStyle(lastChild, 'float', true)))) {
dom.add(block, 'br');
}
}
}
rng = selection.getRng(true);
// Event is blocked by some other handler for example the lists plugin
if (evt.isDefaultPrevented()) {
return;
}
// Delete any selected contents
if (!rng.collapsed) {
editor.execCommand('Delete');
return;
}
// Setup range items and newBlockName
new RangeUtils(dom).normalize(rng);
container = rng.startContainer;
offset = rng.startOffset;
newBlockName = (settings.force_p_newlines ? 'p' : '') || settings.forced_root_block;
newBlockName = newBlockName ? newBlockName.toUpperCase() : '';
documentMode = dom.doc.documentMode;
shiftKey = evt.shiftKey;
// Resolve node index
if (container.nodeType == 1 && container.hasChildNodes()) {
isAfterLastNodeInContainer = offset > container.childNodes.length - 1;
container = container.childNodes[Math.min(offset, container.childNodes.length - 1)] || container;
if (isAfterLastNodeInContainer && container.nodeType == 3) {
offset = container.nodeValue.length;
} else {
offset = 0;
}
}
// Get editable root node normaly the body element but sometimes a div or span
editableRoot = getEditableRoot(container);
// If there is no editable root then enter is done inside a contentEditable false element
if (!editableRoot) {
return;
}
undoManager.beforeChange();
// If editable root isn't block nor the root of the editor
if (!dom.isBlock(editableRoot) && editableRoot != dom.getRoot()) {
if (!newBlockName || shiftKey) {
insertBr();
}
return;
}
// Wrap the current node and it's sibling in a default block if it's needed.
// for example this <td>text|<b>text2</b></td> will become this <td><p>text|<b>text2</p></b></td>
// This won't happen if root blocks are disabled or the shiftKey is pressed
if ((newBlockName && !shiftKey) || (!newBlockName && shiftKey)) {
container = wrapSelfAndSiblingsInDefaultBlock(container, offset);
}
// Find parent block and setup empty block paddings
parentBlock = dom.getParent(container, dom.isBlock);
containerBlock = parentBlock ? dom.getParent(parentBlock.parentNode, dom.isBlock) : null;
// Setup block names
parentBlockName = parentBlock ? parentBlock.nodeName.toUpperCase() : ''; // IE < 9 & HTML5
containerBlockName = containerBlock ? containerBlock.nodeName.toUpperCase() : ''; // IE < 9 & HTML5
// Enter inside block contained within a LI then split or insert before/after LI
if (containerBlockName == 'LI' && !evt.ctrlKey) {
parentBlock = containerBlock;
parentBlockName = containerBlockName;
}
// Handle enter in list item
if (/^(LI|DT|DD)$/.test(parentBlockName)) {
if (!newBlockName && shiftKey) {
insertBr();
return;
}
// Handle enter inside an empty list item
if (dom.isEmpty(parentBlock)) {
handleEmptyListItem();
return;
}
}
// Don't split PRE tags but insert a BR instead easier when writing code samples etc
if (parentBlockName == 'PRE' && settings.br_in_pre !== false) {
if (!shiftKey) {
insertBr();
return;
}
} else {
// If no root block is configured then insert a BR by default or if the shiftKey is pressed
if ((!newBlockName && !shiftKey && parentBlockName != 'LI') || (newBlockName && shiftKey)) {
insertBr();
return;
}
}
// If parent block is root then never insert new blocks
if (newBlockName && parentBlock === editor.getBody()) {
return;
}
// Default block name if it's not configured
newBlockName = newBlockName || 'P';
// Insert new block before/after the parent block depending on caret location
if (isCaretAtStartOrEndOfBlock()) {
// If the caret is at the end of a header we produce a P tag after it similar to Word unless we are in a hgroup
if (/^(H[1-6]|PRE|FIGURE)$/.test(parentBlockName) && containerBlockName != 'HGROUP') {
newBlock = createNewBlock(newBlockName);
} else {
newBlock = createNewBlock();
}
// Split the current container block element if enter is pressed inside an empty inner block element
if (settings.end_container_on_empty_block && canSplitBlock(containerBlock) && dom.isEmpty(parentBlock)) {
// Split container block for example a BLOCKQUOTE at the current blockParent location for example a P
newBlock = dom.split(containerBlock, parentBlock);
} else {
dom.insertAfter(newBlock, parentBlock);
}
moveToCaretPosition(newBlock);
} else if (isCaretAtStartOrEndOfBlock(true)) {
// Insert new block before
newBlock = parentBlock.parentNode.insertBefore(createNewBlock(), parentBlock);
renderBlockOnIE(newBlock);
moveToCaretPosition(parentBlock);
} else {
// Extract after fragment and insert it after the current block
tmpRng = rng.cloneRange();
tmpRng.setEndAfter(parentBlock);
fragment = tmpRng.extractContents();
trimLeadingLineBreaks(fragment);
newBlock = fragment.firstChild;
dom.insertAfter(fragment, parentBlock);
trimInlineElementsOnLeftSideOfBlock(newBlock);
addBrToBlockIfNeeded(parentBlock);
moveToCaretPosition(newBlock);
}
dom.setAttrib(newBlock, 'id', ''); // Remove ID since it needs to be document unique
// Allow custom handling of new blocks
editor.fire('NewBlock', {newBlock: newBlock});
undoManager.add();
}
editor.on('keydown', function(evt) {
if (evt.keyCode == 13) {
if (handleEnterKey(evt) !== false) {
evt.preventDefault();
}
}
});
};
});