FakeCaret.js
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/**
* FakeCaret.js
*
* Released under LGPL License.
* Copyright (c) 1999-2015 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* This module contains logic for rendering a fake visual caret.
*
* @private
* @class tinymce.caret.FakeCaret
*/
define("tinymce/caret/FakeCaret", [
"tinymce/caret/CaretContainer",
"tinymce/caret/CaretPosition",
"tinymce/dom/NodeType",
"tinymce/dom/RangeUtils",
"tinymce/dom/DomQuery",
"tinymce/geom/ClientRect",
"tinymce/util/Delay"
], function(CaretContainer, CaretPosition, NodeType, RangeUtils, $, ClientRect, Delay) {
var isContentEditableFalse = NodeType.isContentEditableFalse;
return function(rootNode, isBlock) {
var cursorInterval, $lastVisualCaret, caretContainerNode;
function getAbsoluteClientRect(node, before) {
var clientRect = ClientRect.collapse(node.getBoundingClientRect(), before),
docElm, scrollX, scrollY, margin, rootRect;
if (rootNode.tagName == 'BODY') {
docElm = rootNode.ownerDocument.documentElement;
scrollX = rootNode.scrollLeft || docElm.scrollLeft;
scrollY = rootNode.scrollTop || docElm.scrollTop;
} else {
rootRect = rootNode.getBoundingClientRect();
scrollX = rootNode.scrollLeft - rootRect.left;
scrollY = rootNode.scrollTop - rootRect.top;
}
clientRect.left += scrollX;
clientRect.right += scrollX;
clientRect.top += scrollY;
clientRect.bottom += scrollY;
clientRect.width = 1;
margin = node.offsetWidth - node.clientWidth;
if (margin > 0) {
if (before) {
margin *= -1;
}
clientRect.left += margin;
clientRect.right += margin;
}
return clientRect;
}
function trimInlineCaretContainers() {
var contentEditableFalseNodes, node, sibling, i, data;
contentEditableFalseNodes = $('*[contentEditable=false]', rootNode);
for (i = 0; i < contentEditableFalseNodes.length; i++) {
node = contentEditableFalseNodes[i];
sibling = node.previousSibling;
if (CaretContainer.endsWithCaretContainer(sibling)) {
data = sibling.data;
if (data.length == 1) {
sibling.parentNode.removeChild(sibling);
} else {
sibling.deleteData(data.length - 1, 1);
}
}
sibling = node.nextSibling;
if (CaretContainer.startsWithCaretContainer(sibling)) {
data = sibling.data;
if (data.length == 1) {
sibling.parentNode.removeChild(sibling);
} else {
sibling.deleteData(0, 1);
}
}
}
return null;
}
function show(before, node) {
var clientRect, rng, container;
hide();
if (isBlock(node)) {
caretContainerNode = CaretContainer.insertBlock('p', node, before);
clientRect = getAbsoluteClientRect(node, before);
$(caretContainerNode).css('top', clientRect.top);
$lastVisualCaret = $('<div class="mce-visual-caret" data-mce-bogus="all"></div>').css(clientRect).appendTo(rootNode);
if (before) {
$lastVisualCaret.addClass('mce-visual-caret-before');
}
startBlink();
rng = node.ownerDocument.createRange();
container = caretContainerNode.firstChild;
rng.setStart(container, 0);
rng.setEnd(container, 1);
} else {
caretContainerNode = CaretContainer.insertInline(node, before);
rng = node.ownerDocument.createRange();
if (isContentEditableFalse(caretContainerNode.nextSibling)) {
rng.setStart(caretContainerNode, 0);
rng.setEnd(caretContainerNode, 0);
} else {
rng.setStart(caretContainerNode, 1);
rng.setEnd(caretContainerNode, 1);
}
return rng;
}
return rng;
}
function hide() {
trimInlineCaretContainers();
if (caretContainerNode) {
CaretContainer.remove(caretContainerNode);
caretContainerNode = null;
}
if ($lastVisualCaret) {
$lastVisualCaret.remove();
$lastVisualCaret = null;
}
clearInterval(cursorInterval);
}
function startBlink() {
cursorInterval = Delay.setInterval(function() {
$('div.mce-visual-caret', rootNode).toggleClass('mce-visual-caret-hidden');
}, 500);
}
function destroy() {
Delay.clearInterval(cursorInterval);
}
function getCss() {
return (
'.mce-visual-caret {' +
'position: absolute;' +
'background-color: black;' +
'background-color: currentcolor;' +
'}' +
'.mce-visual-caret-hidden {' +
'display: none;' +
'}' +
'*[data-mce-caret] {' +
'position: absolute;' +
'left: -1000px;' +
'right: auto;' +
'top: 0;' +
'margin: 0;' +
'padding: 0;' +
'}'
);
}
return {
show: show,
hide: hide,
getCss: getCss,
destroy: destroy
};
};
});