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mediawiki-extensions-Visual.../modules/rangy/rangy-core.js
Inez Korczynski 2d531ed213 Get getSelection in contenteditable working
2012-02-08 00:02:08 +00:00

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/**
* @license Rangy, a cross-browser JavaScript range and selection library
* http://code.google.com/p/rangy/
*
* Copyright 2011, Tim Down
* Licensed under the MIT license.
* Version: 1.2.2
* Build date: 13 November 2011
*/
window['rangy'] = (function() {
var OBJECT = "object", FUNCTION = "function", UNDEFINED = "undefined";
var domRangeProperties = ["startContainer", "startOffset", "endContainer", "endOffset", "collapsed",
"commonAncestorContainer", "START_TO_START", "START_TO_END", "END_TO_START", "END_TO_END"];
var domRangeMethods = ["setStart", "setStartBefore", "setStartAfter", "setEnd", "setEndBefore",
"setEndAfter", "collapse", "selectNode", "selectNodeContents", "compareBoundaryPoints", "deleteContents",
"extractContents", "cloneContents", "insertNode", "surroundContents", "cloneRange", "toString", "detach"];
var textRangeProperties = ["boundingHeight", "boundingLeft", "boundingTop", "boundingWidth", "htmlText", "text"];
// Subset of TextRange's full set of methods that we're interested in
var textRangeMethods = ["collapse", "compareEndPoints", "duplicate", "getBookmark", "moveToBookmark",
"moveToElementText", "parentElement", "pasteHTML", "select", "setEndPoint", "getBoundingClientRect"];
/*----------------------------------------------------------------------------------------------------------------*/
// Trio of functions taken from Peter Michaux's article:
// http://peter.michaux.ca/articles/feature-detection-state-of-the-art-browser-scripting
function isHostMethod(o, p) {
var t = typeof o[p];
return t == FUNCTION || (!!(t == OBJECT && o[p])) || t == "unknown";
}
function isHostObject(o, p) {
return !!(typeof o[p] == OBJECT && o[p]);
}
function isHostProperty(o, p) {
return typeof o[p] != UNDEFINED;
}
// Creates a convenience function to save verbose repeated calls to tests functions
function createMultiplePropertyTest(testFunc) {
return function(o, props) {
var i = props.length;
while (i--) {
if (!testFunc(o, props[i])) {
return false;
}
}
return true;
};
}
// Next trio of functions are a convenience to save verbose repeated calls to previous two functions
var areHostMethods = createMultiplePropertyTest(isHostMethod);
var areHostObjects = createMultiplePropertyTest(isHostObject);
var areHostProperties = createMultiplePropertyTest(isHostProperty);
function isTextRange(range) {
return range && areHostMethods(range, textRangeMethods) && areHostProperties(range, textRangeProperties);
}
var api = {
version: "1.2.2",
initialized: false,
supported: true,
util: {
isHostMethod: isHostMethod,
isHostObject: isHostObject,
isHostProperty: isHostProperty,
areHostMethods: areHostMethods,
areHostObjects: areHostObjects,
areHostProperties: areHostProperties,
isTextRange: isTextRange
},
features: {},
modules: {},
config: {
alertOnWarn: false,
preferTextRange: false
}
};
function fail(reason) {
window.alert("Rangy not supported in your browser. Reason: " + reason);
api.initialized = true;
api.supported = false;
}
api.fail = fail;
function warn(msg) {
var warningMessage = "Rangy warning: " + msg;
if (api.config.alertOnWarn) {
window.alert(warningMessage);
} else if (typeof window.console != UNDEFINED && typeof window.console.log != UNDEFINED) {
window.console.log(warningMessage);
}
}
api.warn = warn;
if ({}.hasOwnProperty) {
api.util.extend = function(o, props) {
for (var i in props) {
if (props.hasOwnProperty(i)) {
o[i] = props[i];
}
}
};
} else {
fail("hasOwnProperty not supported");
}
var initListeners = [];
var moduleInitializers = [];
// Initialization
function init() {
if (api.initialized) {
return;
}
var testRange;
var implementsDomRange = false, implementsTextRange = false;
// First, perform basic feature tests
if (isHostMethod(document, "createRange")) {
testRange = document.createRange();
if (areHostMethods(testRange, domRangeMethods) && areHostProperties(testRange, domRangeProperties)) {
implementsDomRange = true;
}
testRange.detach();
}
var body = isHostObject(document, "body") ? document.body : document.getElementsByTagName("body")[0];
if (body && isHostMethod(body, "createTextRange")) {
testRange = body.createTextRange();
if (isTextRange(testRange)) {
implementsTextRange = true;
}
}
if (!implementsDomRange && !implementsTextRange) {
fail("Neither Range nor TextRange are implemented");
}
api.initialized = true;
api.features = {
implementsDomRange: implementsDomRange,
implementsTextRange: implementsTextRange
};
// Initialize modules and call init listeners
var allListeners = moduleInitializers.concat(initListeners);
for (var i = 0, len = allListeners.length; i < len; ++i) {
try {
allListeners[i](api);
} catch (ex) {
if (isHostObject(window, "console") && isHostMethod(window.console, "log")) {
window.console.log("Init listener threw an exception. Continuing.", ex);
}
}
}
}
// Allow external scripts to initialize this library in case it's loaded after the document has loaded
api.init = init;
// Execute listener immediately if already initialized
api.addInitListener = function(listener) {
if (api.initialized) {
listener(api);
} else {
initListeners.push(listener);
}
};
var createMissingNativeApiListeners = [];
api.addCreateMissingNativeApiListener = function(listener) {
createMissingNativeApiListeners.push(listener);
};
function createMissingNativeApi(win) {
win = win || window;
init();
// Notify listeners
for (var i = 0, len = createMissingNativeApiListeners.length; i < len; ++i) {
createMissingNativeApiListeners[i](win);
}
}
api.createMissingNativeApi = createMissingNativeApi;
/**
* @constructor
*/
function Module(name) {
this.name = name;
this.initialized = false;
this.supported = false;
}
Module.prototype.fail = function(reason) {
this.initialized = true;
this.supported = false;
throw new Error("Module '" + this.name + "' failed to load: " + reason);
};
Module.prototype.warn = function(msg) {
api.warn("Module " + this.name + ": " + msg);
};
Module.prototype.createError = function(msg) {
return new Error("Error in Rangy " + this.name + " module: " + msg);
};
api.createModule = function(name, initFunc) {
var module = new Module(name);
api.modules[name] = module;
moduleInitializers.push(function(api) {
initFunc(api, module);
module.initialized = true;
module.supported = true;
});
};
api.requireModules = function(modules) {
for (var i = 0, len = modules.length, module, moduleName; i < len; ++i) {
moduleName = modules[i];
module = api.modules[moduleName];
if (!module || !(module instanceof Module)) {
throw new Error("Module '" + moduleName + "' not found");
}
if (!module.supported) {
throw new Error("Module '" + moduleName + "' not supported");
}
}
};
/*----------------------------------------------------------------------------------------------------------------*/
// Wait for document to load before running tests
var docReady = false;
var loadHandler = function(e) {
if (!docReady) {
docReady = true;
if (!api.initialized) {
init();
}
}
};
// Test whether we have window and document objects that we will need
if (typeof window == UNDEFINED) {
fail("No window found");
return;
}
if (typeof document == UNDEFINED) {
fail("No document found");
return;
}
if (isHostMethod(document, "addEventListener")) {
document.addEventListener("DOMContentLoaded", loadHandler, false);
}
// Add a fallback in case the DOMContentLoaded event isn't supported
if (isHostMethod(window, "addEventListener")) {
window.addEventListener("load", loadHandler, false);
} else if (isHostMethod(window, "attachEvent")) {
window.attachEvent("onload", loadHandler);
} else {
fail("Window does not have required addEventListener or attachEvent method");
}
return api;
})();
rangy.createModule("DomUtil", function(api, module) {
var UNDEF = "undefined";
var util = api.util;
// Perform feature tests
if (!util.areHostMethods(document, ["createDocumentFragment", "createElement", "createTextNode"])) {
module.fail("document missing a Node creation method");
}
if (!util.isHostMethod(document, "getElementsByTagName")) {
module.fail("document missing getElementsByTagName method");
}
var el = document.createElement("div");
if (!util.areHostMethods(el, ["insertBefore", "appendChild", "cloneNode"] ||
!util.areHostObjects(el, ["previousSibling", "nextSibling", "childNodes", "parentNode"]))) {
module.fail("Incomplete Element implementation");
}
// innerHTML is required for Range's createContextualFragment method
if (!util.isHostProperty(el, "innerHTML")) {
module.fail("Element is missing innerHTML property");
}
var textNode = document.createTextNode("test");
if (!util.areHostMethods(textNode, ["splitText", "deleteData", "insertData", "appendData", "cloneNode"] ||
!util.areHostObjects(el, ["previousSibling", "nextSibling", "childNodes", "parentNode"]) ||
!util.areHostProperties(textNode, ["data"]))) {
module.fail("Incomplete Text Node implementation");
}
/*----------------------------------------------------------------------------------------------------------------*/
// Removed use of indexOf because of a bizarre bug in Opera that is thrown in one of the Acid3 tests. I haven't been
// able to replicate it outside of the test. The bug is that indexOf returns -1 when called on an Array that
// contains just the document as a single element and the value searched for is the document.
var arrayContains = /*Array.prototype.indexOf ?
function(arr, val) {
return arr.indexOf(val) > -1;
}:*/
function(arr, val) {
var i = arr.length;
while (i--) {
if (arr[i] === val) {
return true;
}
}
return false;
};
// Opera 11 puts HTML elements in the null namespace, it seems, and IE 7 has undefined namespaceURI
function isHtmlNamespace(node) {
var ns;
return typeof node.namespaceURI == UNDEF || ((ns = node.namespaceURI) === null || ns == "http://www.w3.org/1999/xhtml");
}
function parentElement(node) {
var parent = node.parentNode;
return (parent.nodeType == 1) ? parent : null;
}
function getNodeIndex(node) {
var i = 0;
while( (node = node.previousSibling) ) {
i++;
}
return i;
}
function getNodeLength(node) {
var childNodes;
return isCharacterDataNode(node) ? node.length : ((childNodes = node.childNodes) ? childNodes.length : 0);
}
function getCommonAncestor(node1, node2) {
var ancestors = [], n;
for (n = node1; n; n = n.parentNode) {
ancestors.push(n);
}
for (n = node2; n; n = n.parentNode) {
if (arrayContains(ancestors, n)) {
return n;
}
}
return null;
}
function isAncestorOf(ancestor, descendant, selfIsAncestor) {
var n = selfIsAncestor ? descendant : descendant.parentNode;
while (n) {
if (n === ancestor) {
return true;
} else {
n = n.parentNode;
}
}
return false;
}
function getClosestAncestorIn(node, ancestor, selfIsAncestor) {
var p, n = selfIsAncestor ? node : node.parentNode;
while (n) {
p = n.parentNode;
if (p === ancestor) {
return n;
}
n = p;
}
return null;
}
function isCharacterDataNode(node) {
var t = node.nodeType;
return t == 3 || t == 4 || t == 8 ; // Text, CDataSection or Comment
}
function insertAfter(node, precedingNode) {
var nextNode = precedingNode.nextSibling, parent = precedingNode.parentNode;
if (nextNode) {
parent.insertBefore(node, nextNode);
} else {
parent.appendChild(node);
}
return node;
}
// Note that we cannot use splitText() because it is bugridden in IE 9.
function splitDataNode(node, index) {
var newNode = node.cloneNode(false);
newNode.deleteData(0, index);
node.deleteData(index, node.length - index);
insertAfter(newNode, node);
return newNode;
}
function getDocument(node) {
if (node.nodeType == 9) {
return node;
} else if (typeof node.ownerDocument != UNDEF) {
return node.ownerDocument;
} else if (typeof node.document != UNDEF) {
return node.document;
} else if (node.parentNode) {
return getDocument(node.parentNode);
} else {
throw new Error("getDocument: no document found for node");
}
}
function getWindow(node) {
var doc = getDocument(node);
if (typeof doc.defaultView != UNDEF) {
return doc.defaultView;
} else if (typeof doc.parentWindow != UNDEF) {
return doc.parentWindow;
} else {
throw new Error("Cannot get a window object for node");
}
}
function getIframeDocument(iframeEl) {
if (typeof iframeEl.contentDocument != UNDEF) {
return iframeEl.contentDocument;
} else if (typeof iframeEl.contentWindow != UNDEF) {
return iframeEl.contentWindow.document;
} else {
throw new Error("getIframeWindow: No Document object found for iframe element");
}
}
function getIframeWindow(iframeEl) {
if (typeof iframeEl.contentWindow != UNDEF) {
return iframeEl.contentWindow;
} else if (typeof iframeEl.contentDocument != UNDEF) {
return iframeEl.contentDocument.defaultView;
} else {
throw new Error("getIframeWindow: No Window object found for iframe element");
}
}
function getBody(doc) {
return util.isHostObject(doc, "body") ? doc.body : doc.getElementsByTagName("body")[0];
}
function getRootContainer(node) {
var parent;
while ( (parent = node.parentNode) ) {
node = parent;
}
return node;
}
function comparePoints(nodeA, offsetA, nodeB, offsetB) {
// See http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html#Level-2-Range-Comparing
var nodeC, root, childA, childB, n;
if (nodeA == nodeB) {
// Case 1: nodes are the same
return offsetA === offsetB ? 0 : (offsetA < offsetB) ? -1 : 1;
} else if ( (nodeC = getClosestAncestorIn(nodeB, nodeA, true)) ) {
// Case 2: node C (container B or an ancestor) is a child node of A
return offsetA <= getNodeIndex(nodeC) ? -1 : 1;
} else if ( (nodeC = getClosestAncestorIn(nodeA, nodeB, true)) ) {
// Case 3: node C (container A or an ancestor) is a child node of B
return getNodeIndex(nodeC) < offsetB ? -1 : 1;
} else {
// Case 4: containers are siblings or descendants of siblings
root = getCommonAncestor(nodeA, nodeB);
childA = (nodeA === root) ? root : getClosestAncestorIn(nodeA, root, true);
childB = (nodeB === root) ? root : getClosestAncestorIn(nodeB, root, true);
if (childA === childB) {
// This shouldn't be possible
throw new Error("comparePoints got to case 4 and childA and childB are the same!");
} else {
n = root.firstChild;
while (n) {
if (n === childA) {
return -1;
} else if (n === childB) {
return 1;
}
n = n.nextSibling;
}
throw new Error("Should not be here!");
}
}
}
function fragmentFromNodeChildren(node) {
var fragment = getDocument(node).createDocumentFragment(), child;
while ( (child = node.firstChild) ) {
fragment.appendChild(child);
}
return fragment;
}
function inspectNode(node) {
if (!node) {
return "[No node]";
}
if (isCharacterDataNode(node)) {
return '"' + node.data + '"';
} else if (node.nodeType == 1) {
var idAttr = node.id ? ' id="' + node.id + '"' : "";
return "<" + node.nodeName + idAttr + ">[" + node.childNodes.length + "]";
} else {
return node.nodeName;
}
}
/**
* @constructor
*/
function NodeIterator(root) {
this.root = root;
this._next = root;
}
NodeIterator.prototype = {
_current: null,
hasNext: function() {
return !!this._next;
},
next: function() {
var n = this._current = this._next;
var child, next;
if (this._current) {
child = n.firstChild;
if (child) {
this._next = child;
} else {
next = null;
while ((n !== this.root) && !(next = n.nextSibling)) {
n = n.parentNode;
}
this._next = next;
}
}
return this._current;
},
detach: function() {
this._current = this._next = this.root = null;
}
};
function createIterator(root) {
return new NodeIterator(root);
}
/**
* @constructor
*/
function DomPosition(node, offset) {
this.node = node;
this.offset = offset;
}
DomPosition.prototype = {
equals: function(pos) {
return this.node === pos.node & this.offset == pos.offset;
},
inspect: function() {
return "[DomPosition(" + inspectNode(this.node) + ":" + this.offset + ")]";
}
};
/**
* @constructor
*/
function DOMException(codeName) {
this.code = this[codeName];
this.codeName = codeName;
this.message = "DOMException: " + this.codeName;
}
DOMException.prototype = {
INDEX_SIZE_ERR: 1,
HIERARCHY_REQUEST_ERR: 3,
WRONG_DOCUMENT_ERR: 4,
NO_MODIFICATION_ALLOWED_ERR: 7,
NOT_FOUND_ERR: 8,
NOT_SUPPORTED_ERR: 9,
INVALID_STATE_ERR: 11
};
DOMException.prototype.toString = function() {
return this.message;
};
api.dom = {
arrayContains: arrayContains,
isHtmlNamespace: isHtmlNamespace,
parentElement: parentElement,
getNodeIndex: getNodeIndex,
getNodeLength: getNodeLength,
getCommonAncestor: getCommonAncestor,
isAncestorOf: isAncestorOf,
getClosestAncestorIn: getClosestAncestorIn,
isCharacterDataNode: isCharacterDataNode,
insertAfter: insertAfter,
splitDataNode: splitDataNode,
getDocument: getDocument,
getWindow: getWindow,
getIframeWindow: getIframeWindow,
getIframeDocument: getIframeDocument,
getBody: getBody,
getRootContainer: getRootContainer,
comparePoints: comparePoints,
inspectNode: inspectNode,
fragmentFromNodeChildren: fragmentFromNodeChildren,
createIterator: createIterator,
DomPosition: DomPosition
};
api.DOMException = DOMException;
});rangy.createModule("DomRange", function(api, module) {
api.requireModules( ["DomUtil"] );
var dom = api.dom;
var DomPosition = dom.DomPosition;
var DOMException = api.DOMException;
/*----------------------------------------------------------------------------------------------------------------*/
// Utility functions
function isNonTextPartiallySelected(node, range) {
return (node.nodeType != 3) &&
(dom.isAncestorOf(node, range.startContainer, true) || dom.isAncestorOf(node, range.endContainer, true));
}
function getRangeDocument(range) {
return dom.getDocument(range.startContainer);
}
function dispatchEvent(range, type, args) {
var listeners = range._listeners[type];
if (listeners) {
for (var i = 0, len = listeners.length; i < len; ++i) {
listeners[i].call(range, {target: range, args: args});
}
}
}
function getBoundaryBeforeNode(node) {
return new DomPosition(node.parentNode, dom.getNodeIndex(node));
}
function getBoundaryAfterNode(node) {
return new DomPosition(node.parentNode, dom.getNodeIndex(node) + 1);
}
function insertNodeAtPosition(node, n, o) {
var firstNodeInserted = node.nodeType == 11 ? node.firstChild : node;
if (dom.isCharacterDataNode(n)) {
if (o == n.length) {
dom.insertAfter(node, n);
} else {
n.parentNode.insertBefore(node, o == 0 ? n : dom.splitDataNode(n, o));
}
} else if (o >= n.childNodes.length) {
n.appendChild(node);
} else {
n.insertBefore(node, n.childNodes[o]);
}
return firstNodeInserted;
}
function cloneSubtree(iterator) {
var partiallySelected;
for (var node, frag = getRangeDocument(iterator.range).createDocumentFragment(), subIterator; node = iterator.next(); ) {
partiallySelected = iterator.isPartiallySelectedSubtree();
node = node.cloneNode(!partiallySelected);
if (partiallySelected) {
subIterator = iterator.getSubtreeIterator();
node.appendChild(cloneSubtree(subIterator));
subIterator.detach(true);
}
if (node.nodeType == 10) { // DocumentType
throw new DOMException("HIERARCHY_REQUEST_ERR");
}
frag.appendChild(node);
}
return frag;
}
function iterateSubtree(rangeIterator, func, iteratorState) {
var it, n;
iteratorState = iteratorState || { stop: false };
for (var node, subRangeIterator; node = rangeIterator.next(); ) {
//log.debug("iterateSubtree, partially selected: " + rangeIterator.isPartiallySelectedSubtree(), nodeToString(node));
if (rangeIterator.isPartiallySelectedSubtree()) {
// The node is partially selected by the Range, so we can use a new RangeIterator on the portion of the
// node selected by the Range.
if (func(node) === false) {
iteratorState.stop = true;
return;
} else {
subRangeIterator = rangeIterator.getSubtreeIterator();
iterateSubtree(subRangeIterator, func, iteratorState);
subRangeIterator.detach(true);
if (iteratorState.stop) {
return;
}
}
} else {
// The whole node is selected, so we can use efficient DOM iteration to iterate over the node and its
// descendant
it = dom.createIterator(node);
while ( (n = it.next()) ) {
if (func(n) === false) {
iteratorState.stop = true;
return;
}
}
}
}
}
function deleteSubtree(iterator) {
var subIterator;
while (iterator.next()) {
if (iterator.isPartiallySelectedSubtree()) {
subIterator = iterator.getSubtreeIterator();
deleteSubtree(subIterator);
subIterator.detach(true);
} else {
iterator.remove();
}
}
}
function extractSubtree(iterator) {
for (var node, frag = getRangeDocument(iterator.range).createDocumentFragment(), subIterator; node = iterator.next(); ) {
if (iterator.isPartiallySelectedSubtree()) {
node = node.cloneNode(false);
subIterator = iterator.getSubtreeIterator();
node.appendChild(extractSubtree(subIterator));
subIterator.detach(true);
} else {
iterator.remove();
}
if (node.nodeType == 10) { // DocumentType
throw new DOMException("HIERARCHY_REQUEST_ERR");
}
frag.appendChild(node);
}
return frag;
}
function getNodesInRange(range, nodeTypes, filter) {
//log.info("getNodesInRange, " + nodeTypes.join(","));
var filterNodeTypes = !!(nodeTypes && nodeTypes.length), regex;
var filterExists = !!filter;
if (filterNodeTypes) {
regex = new RegExp("^(" + nodeTypes.join("|") + ")$");
}
var nodes = [];
iterateSubtree(new RangeIterator(range, false), function(node) {
if ((!filterNodeTypes || regex.test(node.nodeType)) && (!filterExists || filter(node))) {
nodes.push(node);
}
});
return nodes;
}
function inspect(range) {
var name = (typeof range.getName == "undefined") ? "Range" : range.getName();
return "[" + name + "(" + dom.inspectNode(range.startContainer) + ":" + range.startOffset + ", " +
dom.inspectNode(range.endContainer) + ":" + range.endOffset + ")]";
}
/*----------------------------------------------------------------------------------------------------------------*/
// RangeIterator code partially borrows from IERange by Tim Ryan (http://github.com/timcameronryan/IERange)
/**
* @constructor
*/
function RangeIterator(range, clonePartiallySelectedTextNodes) {
this.range = range;
this.clonePartiallySelectedTextNodes = clonePartiallySelectedTextNodes;
if (!range.collapsed) {
this.sc = range.startContainer;
this.so = range.startOffset;
this.ec = range.endContainer;
this.eo = range.endOffset;
var root = range.commonAncestorContainer;
if (this.sc === this.ec && dom.isCharacterDataNode(this.sc)) {
this.isSingleCharacterDataNode = true;
this._first = this._last = this._next = this.sc;
} else {
this._first = this._next = (this.sc === root && !dom.isCharacterDataNode(this.sc)) ?
this.sc.childNodes[this.so] : dom.getClosestAncestorIn(this.sc, root, true);
this._last = (this.ec === root && !dom.isCharacterDataNode(this.ec)) ?
this.ec.childNodes[this.eo - 1] : dom.getClosestAncestorIn(this.ec, root, true);
}
}
}
RangeIterator.prototype = {
_current: null,
_next: null,
_first: null,
_last: null,
isSingleCharacterDataNode: false,
reset: function() {
this._current = null;
this._next = this._first;
},
hasNext: function() {
return !!this._next;
},
next: function() {
// Move to next node
var current = this._current = this._next;
if (current) {
this._next = (current !== this._last) ? current.nextSibling : null;
// Check for partially selected text nodes
if (dom.isCharacterDataNode(current) && this.clonePartiallySelectedTextNodes) {
if (current === this.ec) {
(current = current.cloneNode(true)).deleteData(this.eo, current.length - this.eo);
}
if (this._current === this.sc) {
(current = current.cloneNode(true)).deleteData(0, this.so);
}
}
}
return current;
},
remove: function() {
var current = this._current, start, end;
if (dom.isCharacterDataNode(current) && (current === this.sc || current === this.ec)) {
start = (current === this.sc) ? this.so : 0;
end = (current === this.ec) ? this.eo : current.length;
if (start != end) {
current.deleteData(start, end - start);
}
} else {
if (current.parentNode) {
current.parentNode.removeChild(current);
} else {
}
}
},
// Checks if the current node is partially selected
isPartiallySelectedSubtree: function() {
var current = this._current;
return isNonTextPartiallySelected(current, this.range);
},
getSubtreeIterator: function() {
var subRange;
if (this.isSingleCharacterDataNode) {
subRange = this.range.cloneRange();
subRange.collapse();
} else {
subRange = new Range(getRangeDocument(this.range));
var current = this._current;
var startContainer = current, startOffset = 0, endContainer = current, endOffset = dom.getNodeLength(current);
if (dom.isAncestorOf(current, this.sc, true)) {
startContainer = this.sc;
startOffset = this.so;
}
if (dom.isAncestorOf(current, this.ec, true)) {
endContainer = this.ec;
endOffset = this.eo;
}
updateBoundaries(subRange, startContainer, startOffset, endContainer, endOffset);
}
return new RangeIterator(subRange, this.clonePartiallySelectedTextNodes);
},
detach: function(detachRange) {
if (detachRange) {
this.range.detach();
}
this.range = this._current = this._next = this._first = this._last = this.sc = this.so = this.ec = this.eo = null;
}
};
/*----------------------------------------------------------------------------------------------------------------*/
// Exceptions
/**
* @constructor
*/
function RangeException(codeName) {
this.code = this[codeName];
this.codeName = codeName;
this.message = "RangeException: " + this.codeName;
}
RangeException.prototype = {
BAD_BOUNDARYPOINTS_ERR: 1,
INVALID_NODE_TYPE_ERR: 2
};
RangeException.prototype.toString = function() {
return this.message;
};
/*----------------------------------------------------------------------------------------------------------------*/
/**
* Currently iterates through all nodes in the range on creation until I think of a decent way to do it
* TODO: Look into making this a proper iterator, not requiring preloading everything first
* @constructor
*/
function RangeNodeIterator(range, nodeTypes, filter) {
this.nodes = getNodesInRange(range, nodeTypes, filter);
this._next = this.nodes[0];
this._position = 0;
}
RangeNodeIterator.prototype = {
_current: null,
hasNext: function() {
return !!this._next;
},
next: function() {
this._current = this._next;
this._next = this.nodes[ ++this._position ];
return this._current;
},
detach: function() {
this._current = this._next = this.nodes = null;
}
};
var beforeAfterNodeTypes = [1, 3, 4, 5, 7, 8, 10];
var rootContainerNodeTypes = [2, 9, 11];
var readonlyNodeTypes = [5, 6, 10, 12];
var insertableNodeTypes = [1, 3, 4, 5, 7, 8, 10, 11];
var surroundNodeTypes = [1, 3, 4, 5, 7, 8];
function createAncestorFinder(nodeTypes) {
return function(node, selfIsAncestor) {
var t, n = selfIsAncestor ? node : node.parentNode;
while (n) {
t = n.nodeType;
if (dom.arrayContains(nodeTypes, t)) {
return n;
}
n = n.parentNode;
}
return null;
};
}
var getRootContainer = dom.getRootContainer;
var getDocumentOrFragmentContainer = createAncestorFinder( [9, 11] );
var getReadonlyAncestor = createAncestorFinder(readonlyNodeTypes);
var getDocTypeNotationEntityAncestor = createAncestorFinder( [6, 10, 12] );
function assertNoDocTypeNotationEntityAncestor(node, allowSelf) {
if (getDocTypeNotationEntityAncestor(node, allowSelf)) {
throw new RangeException("INVALID_NODE_TYPE_ERR");
}
}
function assertNotDetached(range) {
if (!range.startContainer) {
throw new DOMException("INVALID_STATE_ERR");
}
}
function assertValidNodeType(node, invalidTypes) {
if (!dom.arrayContains(invalidTypes, node.nodeType)) {
throw new RangeException("INVALID_NODE_TYPE_ERR");
}
}
function assertValidOffset(node, offset) {
if (offset < 0 || offset > (dom.isCharacterDataNode(node) ? node.length : node.childNodes.length)) {
throw new DOMException("INDEX_SIZE_ERR");
}
}
function assertSameDocumentOrFragment(node1, node2) {
if (getDocumentOrFragmentContainer(node1, true) !== getDocumentOrFragmentContainer(node2, true)) {
throw new DOMException("WRONG_DOCUMENT_ERR");
}
}
function assertNodeNotReadOnly(node) {
if (getReadonlyAncestor(node, true)) {
throw new DOMException("NO_MODIFICATION_ALLOWED_ERR");
}
}
function assertNode(node, codeName) {
if (!node) {
throw new DOMException(codeName);
}
}
function isOrphan(node) {
return !dom.arrayContains(rootContainerNodeTypes, node.nodeType) && !getDocumentOrFragmentContainer(node, true);
}
function isValidOffset(node, offset) {
return offset <= (dom.isCharacterDataNode(node) ? node.length : node.childNodes.length);
}
function assertRangeValid(range) {
assertNotDetached(range);
if (isOrphan(range.startContainer) || isOrphan(range.endContainer) ||
!isValidOffset(range.startContainer, range.startOffset) ||
!isValidOffset(range.endContainer, range.endOffset)) {
throw new Error("Range error: Range is no longer valid after DOM mutation (" + range.inspect() + ")");
}
}
/*----------------------------------------------------------------------------------------------------------------*/
// Test the browser's innerHTML support to decide how to implement createContextualFragment
var styleEl = document.createElement("style");
var htmlParsingConforms = false;
try {
styleEl.innerHTML = "<b>x</b>";
htmlParsingConforms = (styleEl.firstChild.nodeType == 3); // Opera incorrectly creates an element node
} catch (e) {
// IE 6 and 7 throw
}
api.features.htmlParsingConforms = htmlParsingConforms;
var createContextualFragment = htmlParsingConforms ?
// Implementation as per HTML parsing spec, trusting in the browser's implementation of innerHTML. See
// discussion and base code for this implementation at issue 67.
// Spec: http://html5.org/specs/dom-parsing.html#extensions-to-the-range-interface
// Thanks to Aleks Williams.
function(fragmentStr) {
// "Let node the context object's start's node."
var node = this.startContainer;
var doc = dom.getDocument(node);
// "If the context object's start's node is null, raise an INVALID_STATE_ERR
// exception and abort these steps."
if (!node) {
throw new DOMException("INVALID_STATE_ERR");
}
// "Let element be as follows, depending on node's interface:"
// Document, Document Fragment: null
var el = null;
// "Element: node"
if (node.nodeType == 1) {
el = node;
// "Text, Comment: node's parentElement"
} else if (dom.isCharacterDataNode(node)) {
el = dom.parentElement(node);
}
// "If either element is null or element's ownerDocument is an HTML document
// and element's local name is "html" and element's namespace is the HTML
// namespace"
if (el === null || (
el.nodeName == "HTML"
&& dom.isHtmlNamespace(dom.getDocument(el).documentElement)
&& dom.isHtmlNamespace(el)
)) {
// "let element be a new Element with "body" as its local name and the HTML
// namespace as its namespace.""
el = doc.createElement("body");
} else {
el = el.cloneNode(false);
}
// "If the node's document is an HTML document: Invoke the HTML fragment parsing algorithm."
// "If the node's document is an XML document: Invoke the XML fragment parsing algorithm."
// "In either case, the algorithm must be invoked with fragment as the input
// and element as the context element."
el.innerHTML = fragmentStr;
// "If this raises an exception, then abort these steps. Otherwise, let new
// children be the nodes returned."
// "Let fragment be a new DocumentFragment."
// "Append all new children to fragment."
// "Return fragment."
return dom.fragmentFromNodeChildren(el);
} :
// In this case, innerHTML cannot be trusted, so fall back to a simpler, non-conformant implementation that
// previous versions of Rangy used (with the exception of using a body element rather than a div)
function(fragmentStr) {
assertNotDetached(this);
var doc = getRangeDocument(this);
var el = doc.createElement("body");
el.innerHTML = fragmentStr;
return dom.fragmentFromNodeChildren(el);
};
/*----------------------------------------------------------------------------------------------------------------*/
var rangeProperties = ["startContainer", "startOffset", "endContainer", "endOffset", "collapsed",
"commonAncestorContainer"];
var s2s = 0, s2e = 1, e2e = 2, e2s = 3;
var n_b = 0, n_a = 1, n_b_a = 2, n_i = 3;
function RangePrototype() {}
RangePrototype.prototype = {
attachListener: function(type, listener) {
this._listeners[type].push(listener);
},
compareBoundaryPoints: function(how, range) {
assertRangeValid(this);
assertSameDocumentOrFragment(this.startContainer, range.startContainer);
var nodeA, offsetA, nodeB, offsetB;
var prefixA = (how == e2s || how == s2s) ? "start" : "end";
var prefixB = (how == s2e || how == s2s) ? "start" : "end";
nodeA = this[prefixA + "Container"];
offsetA = this[prefixA + "Offset"];
nodeB = range[prefixB + "Container"];
offsetB = range[prefixB + "Offset"];
return dom.comparePoints(nodeA, offsetA, nodeB, offsetB);
},
insertNode: function(node) {
assertRangeValid(this);
assertValidNodeType(node, insertableNodeTypes);
assertNodeNotReadOnly(this.startContainer);
if (dom.isAncestorOf(node, this.startContainer, true)) {
throw new DOMException("HIERARCHY_REQUEST_ERR");
}
// No check for whether the container of the start of the Range is of a type that does not allow
// children of the type of node: the browser's DOM implementation should do this for us when we attempt
// to add the node
var firstNodeInserted = insertNodeAtPosition(node, this.startContainer, this.startOffset);
this.setStartBefore(firstNodeInserted);
},
cloneContents: function() {
assertRangeValid(this);
var clone, frag;
if (this.collapsed) {
return getRangeDocument(this).createDocumentFragment();
} else {
if (this.startContainer === this.endContainer && dom.isCharacterDataNode(this.startContainer)) {
clone = this.startContainer.cloneNode(true);
clone.data = clone.data.slice(this.startOffset, this.endOffset);
frag = getRangeDocument(this).createDocumentFragment();
frag.appendChild(clone);
return frag;
} else {
var iterator = new RangeIterator(this, true);
clone = cloneSubtree(iterator);
iterator.detach();
}
return clone;
}
},
canSurroundContents: function() {
assertRangeValid(this);
assertNodeNotReadOnly(this.startContainer);
assertNodeNotReadOnly(this.endContainer);
// Check if the contents can be surrounded. Specifically, this means whether the range partially selects
// no non-text nodes.
var iterator = new RangeIterator(this, true);
var boundariesInvalid = (iterator._first && (isNonTextPartiallySelected(iterator._first, this)) ||
(iterator._last && isNonTextPartiallySelected(iterator._last, this)));
iterator.detach();
return !boundariesInvalid;
},
surroundContents: function(node) {
assertValidNodeType(node, surroundNodeTypes);
if (!this.canSurroundContents()) {
throw new RangeException("BAD_BOUNDARYPOINTS_ERR");
}
// Extract the contents
var content = this.extractContents();
// Clear the children of the node
if (node.hasChildNodes()) {
while (node.lastChild) {
node.removeChild(node.lastChild);
}
}
// Insert the new node and add the extracted contents
insertNodeAtPosition(node, this.startContainer, this.startOffset);
node.appendChild(content);
this.selectNode(node);
},
cloneRange: function() {
assertRangeValid(this);
var range = new Range(getRangeDocument(this));
var i = rangeProperties.length, prop;
while (i--) {
prop = rangeProperties[i];
range[prop] = this[prop];
}
return range;
},
toString: function() {
assertRangeValid(this);
var sc = this.startContainer;
if (sc === this.endContainer && dom.isCharacterDataNode(sc)) {
return (sc.nodeType == 3 || sc.nodeType == 4) ? sc.data.slice(this.startOffset, this.endOffset) : "";
} else {
var textBits = [], iterator = new RangeIterator(this, true);
iterateSubtree(iterator, function(node) {
// Accept only text or CDATA nodes, not comments
if (node.nodeType == 3 || node.nodeType == 4) {
textBits.push(node.data);
}
});
iterator.detach();
return textBits.join("");
}
},
// The methods below are all non-standard. The following batch were introduced by Mozilla but have since
// been removed from Mozilla.
compareNode: function(node) {
assertRangeValid(this);
var parent = node.parentNode;
var nodeIndex = dom.getNodeIndex(node);
if (!parent) {
throw new DOMException("NOT_FOUND_ERR");
}
var startComparison = this.comparePoint(parent, nodeIndex),
endComparison = this.comparePoint(parent, nodeIndex + 1);
if (startComparison < 0) { // Node starts before
return (endComparison > 0) ? n_b_a : n_b;
} else {
return (endComparison > 0) ? n_a : n_i;
}
},
comparePoint: function(node, offset) {
assertRangeValid(this);
assertNode(node, "HIERARCHY_REQUEST_ERR");
assertSameDocumentOrFragment(node, this.startContainer);
if (dom.comparePoints(node, offset, this.startContainer, this.startOffset) < 0) {
return -1;
} else if (dom.comparePoints(node, offset, this.endContainer, this.endOffset) > 0) {
return 1;
}
return 0;
},
createContextualFragment: createContextualFragment,
toHtml: function() {
assertRangeValid(this);
var container = getRangeDocument(this).createElement("div");
container.appendChild(this.cloneContents());
return container.innerHTML;
},
// touchingIsIntersecting determines whether this method considers a node that borders a range intersects
// with it (as in WebKit) or not (as in Gecko pre-1.9, and the default)
intersectsNode: function(node, touchingIsIntersecting) {
assertRangeValid(this);
assertNode(node, "NOT_FOUND_ERR");
if (dom.getDocument(node) !== getRangeDocument(this)) {
return false;
}
var parent = node.parentNode, offset = dom.getNodeIndex(node);
assertNode(parent, "NOT_FOUND_ERR");
var startComparison = dom.comparePoints(parent, offset, this.endContainer, this.endOffset),
endComparison = dom.comparePoints(parent, offset + 1, this.startContainer, this.startOffset);
return touchingIsIntersecting ? startComparison <= 0 && endComparison >= 0 : startComparison < 0 && endComparison > 0;
},
isPointInRange: function(node, offset) {
assertRangeValid(this);
assertNode(node, "HIERARCHY_REQUEST_ERR");
assertSameDocumentOrFragment(node, this.startContainer);
return (dom.comparePoints(node, offset, this.startContainer, this.startOffset) >= 0) &&
(dom.comparePoints(node, offset, this.endContainer, this.endOffset) <= 0);
},
// The methods below are non-standard and invented by me.
// Sharing a boundary start-to-end or end-to-start does not count as intersection.
intersectsRange: function(range, touchingIsIntersecting) {
assertRangeValid(this);
if (getRangeDocument(range) != getRangeDocument(this)) {
throw new DOMException("WRONG_DOCUMENT_ERR");
}
var startComparison = dom.comparePoints(this.startContainer, this.startOffset, range.endContainer, range.endOffset),
endComparison = dom.comparePoints(this.endContainer, this.endOffset, range.startContainer, range.startOffset);
return touchingIsIntersecting ? startComparison <= 0 && endComparison >= 0 : startComparison < 0 && endComparison > 0;
},
intersection: function(range) {
if (this.intersectsRange(range)) {
var startComparison = dom.comparePoints(this.startContainer, this.startOffset, range.startContainer, range.startOffset),
endComparison = dom.comparePoints(this.endContainer, this.endOffset, range.endContainer, range.endOffset);
var intersectionRange = this.cloneRange();
if (startComparison == -1) {
intersectionRange.setStart(range.startContainer, range.startOffset);
}
if (endComparison == 1) {
intersectionRange.setEnd(range.endContainer, range.endOffset);
}
return intersectionRange;
}
return null;
},
union: function(range) {
if (this.intersectsRange(range, true)) {
var unionRange = this.cloneRange();
if (dom.comparePoints(range.startContainer, range.startOffset, this.startContainer, this.startOffset) == -1) {
unionRange.setStart(range.startContainer, range.startOffset);
}
if (dom.comparePoints(range.endContainer, range.endOffset, this.endContainer, this.endOffset) == 1) {
unionRange.setEnd(range.endContainer, range.endOffset);
}
return unionRange;
} else {
throw new RangeException("Ranges do not intersect");
}
},
containsNode: function(node, allowPartial) {
if (allowPartial) {
return this.intersectsNode(node, false);
} else {
return this.compareNode(node) == n_i;
}
},
containsNodeContents: function(node) {
return this.comparePoint(node, 0) >= 0 && this.comparePoint(node, dom.getNodeLength(node)) <= 0;
},
containsRange: function(range) {
return this.intersection(range).equals(range);
},
containsNodeText: function(node) {
var nodeRange = this.cloneRange();
nodeRange.selectNode(node);
var textNodes = nodeRange.getNodes([3]);
if (textNodes.length > 0) {
nodeRange.setStart(textNodes[0], 0);
var lastTextNode = textNodes.pop();
nodeRange.setEnd(lastTextNode, lastTextNode.length);
var contains = this.containsRange(nodeRange);
nodeRange.detach();
return contains;
} else {
return this.containsNodeContents(node);
}
},
createNodeIterator: function(nodeTypes, filter) {
assertRangeValid(this);
return new RangeNodeIterator(this, nodeTypes, filter);
},
getNodes: function(nodeTypes, filter) {
assertRangeValid(this);
return getNodesInRange(this, nodeTypes, filter);
},
getDocument: function() {
return getRangeDocument(this);
},
collapseBefore: function(node) {
assertNotDetached(this);
this.setEndBefore(node);
this.collapse(false);
},
collapseAfter: function(node) {
assertNotDetached(this);
this.setStartAfter(node);
this.collapse(true);
},
getName: function() {
return "DomRange";
},
equals: function(range) {
return Range.rangesEqual(this, range);
},
inspect: function() {
return inspect(this);
}
};
function copyComparisonConstantsToObject(obj) {
obj.START_TO_START = s2s;
obj.START_TO_END = s2e;
obj.END_TO_END = e2e;
obj.END_TO_START = e2s;
obj.NODE_BEFORE = n_b;
obj.NODE_AFTER = n_a;
obj.NODE_BEFORE_AND_AFTER = n_b_a;
obj.NODE_INSIDE = n_i;
}
function copyComparisonConstants(constructor) {
copyComparisonConstantsToObject(constructor);
copyComparisonConstantsToObject(constructor.prototype);
}
function createRangeContentRemover(remover, boundaryUpdater) {
return function() {
assertRangeValid(this);
var sc = this.startContainer, so = this.startOffset, root = this.commonAncestorContainer;
var iterator = new RangeIterator(this, true);
// Work out where to position the range after content removal
var node, boundary;
if (sc !== root) {
node = dom.getClosestAncestorIn(sc, root, true);
boundary = getBoundaryAfterNode(node);
sc = boundary.node;
so = boundary.offset;
}
// Check none of the range is read-only
iterateSubtree(iterator, assertNodeNotReadOnly);
iterator.reset();
// Remove the content
var returnValue = remover(iterator);
iterator.detach();
// Move to the new position
boundaryUpdater(this, sc, so, sc, so);
return returnValue;
};
}
function createPrototypeRange(constructor, boundaryUpdater, detacher) {
function createBeforeAfterNodeSetter(isBefore, isStart) {
return function(node) {
assertNotDetached(this);
assertValidNodeType(node, beforeAfterNodeTypes);
assertValidNodeType(getRootContainer(node), rootContainerNodeTypes);
var boundary = (isBefore ? getBoundaryBeforeNode : getBoundaryAfterNode)(node);
(isStart ? setRangeStart : setRangeEnd)(this, boundary.node, boundary.offset);
};
}
function setRangeStart(range, node, offset) {
var ec = range.endContainer, eo = range.endOffset;
if (node !== range.startContainer || offset !== range.startOffset) {
// Check the root containers of the range and the new boundary, and also check whether the new boundary
// is after the current end. In either case, collapse the range to the new position
if (getRootContainer(node) != getRootContainer(ec) || dom.comparePoints(node, offset, ec, eo) == 1) {
ec = node;
eo = offset;
}
boundaryUpdater(range, node, offset, ec, eo);
}
}
function setRangeEnd(range, node, offset) {
var sc = range.startContainer, so = range.startOffset;
if (node !== range.endContainer || offset !== range.endOffset) {
// Check the root containers of the range and the new boundary, and also check whether the new boundary
// is after the current end. In either case, collapse the range to the new position
if (getRootContainer(node) != getRootContainer(sc) || dom.comparePoints(node, offset, sc, so) == -1) {
sc = node;
so = offset;
}
boundaryUpdater(range, sc, so, node, offset);
}
}
function setRangeStartAndEnd(range, node, offset) {
if (node !== range.startContainer || offset !== range.startOffset || node !== range.endContainer || offset !== range.endOffset) {
boundaryUpdater(range, node, offset, node, offset);
}
}
constructor.prototype = new RangePrototype();
api.util.extend(constructor.prototype, {
setStart: function(node, offset) {
assertNotDetached(this);
assertNoDocTypeNotationEntityAncestor(node, true);
assertValidOffset(node, offset);
setRangeStart(this, node, offset);
},
setEnd: function(node, offset) {
assertNotDetached(this);
assertNoDocTypeNotationEntityAncestor(node, true);
assertValidOffset(node, offset);
setRangeEnd(this, node, offset);
},
setStartBefore: createBeforeAfterNodeSetter(true, true),
setStartAfter: createBeforeAfterNodeSetter(false, true),
setEndBefore: createBeforeAfterNodeSetter(true, false),
setEndAfter: createBeforeAfterNodeSetter(false, false),
collapse: function(isStart) {
assertRangeValid(this);
if (isStart) {
boundaryUpdater(this, this.startContainer, this.startOffset, this.startContainer, this.startOffset);
} else {
boundaryUpdater(this, this.endContainer, this.endOffset, this.endContainer, this.endOffset);
}
},
selectNodeContents: function(node) {
// This doesn't seem well specified: the spec talks only about selecting the node's contents, which
// could be taken to mean only its children. However, browsers implement this the same as selectNode for
// text nodes, so I shall do likewise
assertNotDetached(this);
assertNoDocTypeNotationEntityAncestor(node, true);
boundaryUpdater(this, node, 0, node, dom.getNodeLength(node));
},
selectNode: function(node) {
assertNotDetached(this);
assertNoDocTypeNotationEntityAncestor(node, false);
assertValidNodeType(node, beforeAfterNodeTypes);
var start = getBoundaryBeforeNode(node), end = getBoundaryAfterNode(node);
boundaryUpdater(this, start.node, start.offset, end.node, end.offset);
},
extractContents: createRangeContentRemover(extractSubtree, boundaryUpdater),
deleteContents: createRangeContentRemover(deleteSubtree, boundaryUpdater),
canSurroundContents: function() {
assertRangeValid(this);
assertNodeNotReadOnly(this.startContainer);
assertNodeNotReadOnly(this.endContainer);
// Check if the contents can be surrounded. Specifically, this means whether the range partially selects
// no non-text nodes.
var iterator = new RangeIterator(this, true);
var boundariesInvalid = (iterator._first && (isNonTextPartiallySelected(iterator._first, this)) ||
(iterator._last && isNonTextPartiallySelected(iterator._last, this)));
iterator.detach();
return !boundariesInvalid;
},
detach: function() {
detacher(this);
},
splitBoundaries: function() {
assertRangeValid(this);
var sc = this.startContainer, so = this.startOffset, ec = this.endContainer, eo = this.endOffset;
var startEndSame = (sc === ec);
if (dom.isCharacterDataNode(ec) && eo > 0 && eo < ec.length) {
dom.splitDataNode(ec, eo);
}
if (dom.isCharacterDataNode(sc) && so > 0 && so < sc.length) {
sc = dom.splitDataNode(sc, so);
if (startEndSame) {
eo -= so;
ec = sc;
} else if (ec == sc.parentNode && eo >= dom.getNodeIndex(sc)) {
eo++;
}
so = 0;
}
boundaryUpdater(this, sc, so, ec, eo);
},
normalizeBoundaries: function() {
assertRangeValid(this);
var sc = this.startContainer, so = this.startOffset, ec = this.endContainer, eo = this.endOffset;
var mergeForward = function(node) {
var sibling = node.nextSibling;
if (sibling && sibling.nodeType == node.nodeType) {
ec = node;
eo = node.length;
node.appendData(sibling.data);
sibling.parentNode.removeChild(sibling);
}
};
var mergeBackward = function(node) {
var sibling = node.previousSibling;
if (sibling && sibling.nodeType == node.nodeType) {
sc = node;
var nodeLength = node.length;
so = sibling.length;
node.insertData(0, sibling.data);
sibling.parentNode.removeChild(sibling);
if (sc == ec) {
eo += so;
ec = sc;
} else if (ec == node.parentNode) {
var nodeIndex = dom.getNodeIndex(node);
if (eo == nodeIndex) {
ec = node;
eo = nodeLength;
} else if (eo > nodeIndex) {
eo--;
}
}
}
};
var normalizeStart = true;
if (dom.isCharacterDataNode(ec)) {
if (ec.length == eo) {
mergeForward(ec);
}
} else {
if (eo > 0) {
var endNode = ec.childNodes[eo - 1];
if (endNode && dom.isCharacterDataNode(endNode)) {
mergeForward(endNode);
}
}
normalizeStart = !this.collapsed;
}
if (normalizeStart) {
if (dom.isCharacterDataNode(sc)) {
if (so == 0) {
mergeBackward(sc);
}
} else {
if (so < sc.childNodes.length) {
var startNode = sc.childNodes[so];
if (startNode && dom.isCharacterDataNode(startNode)) {
mergeBackward(startNode);
}
}
}
} else {
sc = ec;
so = eo;
}
boundaryUpdater(this, sc, so, ec, eo);
},
collapseToPoint: function(node, offset) {
assertNotDetached(this);
assertNoDocTypeNotationEntityAncestor(node, true);
assertValidOffset(node, offset);
setRangeStartAndEnd(this, node, offset);
}
});
copyComparisonConstants(constructor);
}
/*----------------------------------------------------------------------------------------------------------------*/
// Updates commonAncestorContainer and collapsed after boundary change
function updateCollapsedAndCommonAncestor(range) {
range.collapsed = (range.startContainer === range.endContainer && range.startOffset === range.endOffset);
range.commonAncestorContainer = range.collapsed ?
range.startContainer : dom.getCommonAncestor(range.startContainer, range.endContainer);
}
function updateBoundaries(range, startContainer, startOffset, endContainer, endOffset) {
var startMoved = (range.startContainer !== startContainer || range.startOffset !== startOffset);
var endMoved = (range.endContainer !== endContainer || range.endOffset !== endOffset);
range.startContainer = startContainer;
range.startOffset = startOffset;
range.endContainer = endContainer;
range.endOffset = endOffset;
updateCollapsedAndCommonAncestor(range);
dispatchEvent(range, "boundarychange", {startMoved: startMoved, endMoved: endMoved});
}
function detach(range) {
assertNotDetached(range);
range.startContainer = range.startOffset = range.endContainer = range.endOffset = null;
range.collapsed = range.commonAncestorContainer = null;
dispatchEvent(range, "detach", null);
range._listeners = null;
}
/**
* @constructor
*/
function Range(doc) {
this.startContainer = doc;
this.startOffset = 0;
this.endContainer = doc;
this.endOffset = 0;
this._listeners = {
boundarychange: [],
detach: []
};
updateCollapsedAndCommonAncestor(this);
}
createPrototypeRange(Range, updateBoundaries, detach);
api.rangePrototype = RangePrototype.prototype;
Range.rangeProperties = rangeProperties;
Range.RangeIterator = RangeIterator;
Range.copyComparisonConstants = copyComparisonConstants;
Range.createPrototypeRange = createPrototypeRange;
Range.inspect = inspect;
Range.getRangeDocument = getRangeDocument;
Range.rangesEqual = function(r1, r2) {
return r1.startContainer === r2.startContainer &&
r1.startOffset === r2.startOffset &&
r1.endContainer === r2.endContainer &&
r1.endOffset === r2.endOffset;
};
api.DomRange = Range;
api.RangeException = RangeException;
});rangy.createModule("WrappedRange", function(api, module) {
api.requireModules( ["DomUtil", "DomRange"] );
/**
* @constructor
*/
var WrappedRange;
var dom = api.dom;
var DomPosition = dom.DomPosition;
var DomRange = api.DomRange;
/*----------------------------------------------------------------------------------------------------------------*/
/*
This is a workaround for a bug where IE returns the wrong container element from the TextRange's parentElement()
method. For example, in the following (where pipes denote the selection boundaries):
<ul id="ul"><li id="a">| a </li><li id="b"> b |</li></ul>
var range = document.selection.createRange();
alert(range.parentElement().id); // Should alert "ul" but alerts "b"
This method returns the common ancestor node of the following:
- the parentElement() of the textRange
- the parentElement() of the textRange after calling collapse(true)
- the parentElement() of the textRange after calling collapse(false)
*/
function getTextRangeContainerElement(textRange) {
var parentEl = textRange.parentElement();
var range = textRange.duplicate();
range.collapse(true);
var startEl = range.parentElement();
range = textRange.duplicate();
range.collapse(false);
var endEl = range.parentElement();
var startEndContainer = (startEl == endEl) ? startEl : dom.getCommonAncestor(startEl, endEl);
return startEndContainer == parentEl ? startEndContainer : dom.getCommonAncestor(parentEl, startEndContainer);
}
function textRangeIsCollapsed(textRange) {
return textRange.compareEndPoints("StartToEnd", textRange) == 0;
}
// Gets the boundary of a TextRange expressed as a node and an offset within that node. This function started out as
// an improved version of code found in Tim Cameron Ryan's IERange (http://code.google.com/p/ierange/) but has
// grown, fixing problems with line breaks in preformatted text, adding workaround for IE TextRange bugs, handling
// for inputs and images, plus optimizations.
function getTextRangeBoundaryPosition(textRange, wholeRangeContainerElement, isStart, isCollapsed) {
var workingRange = textRange.duplicate();
workingRange.collapse(isStart);
var containerElement = workingRange.parentElement();
// Sometimes collapsing a TextRange that's at the start of a text node can move it into the previous node, so
// check for that
// TODO: Find out when. Workaround for wholeRangeContainerElement may break this
if (!dom.isAncestorOf(wholeRangeContainerElement, containerElement, true)) {
containerElement = wholeRangeContainerElement;
}
// Deal with nodes that cannot "contain rich HTML markup". In practice, this means form inputs, images and
// similar. See http://msdn.microsoft.com/en-us/library/aa703950%28VS.85%29.aspx
if (!containerElement.canHaveHTML) {
return new DomPosition(containerElement.parentNode, dom.getNodeIndex(containerElement));
}
var workingNode = dom.getDocument(containerElement).createElement("span");
var comparison, workingComparisonType = isStart ? "StartToStart" : "StartToEnd";
var previousNode, nextNode, boundaryPosition, boundaryNode;
// Move the working range through the container's children, starting at the end and working backwards, until the
// working range reaches or goes past the boundary we're interested in
do {
containerElement.insertBefore(workingNode, workingNode.previousSibling);
workingRange.moveToElementText(workingNode);
} while ( (comparison = workingRange.compareEndPoints(workingComparisonType, textRange)) > 0 &&
workingNode.previousSibling);
// We've now reached or gone past the boundary of the text range we're interested in
// so have identified the node we want
boundaryNode = workingNode.nextSibling;
if (comparison == -1 && boundaryNode && dom.isCharacterDataNode(boundaryNode)) {
// This is a character data node (text, comment, cdata). The working range is collapsed at the start of the
// node containing the text range's boundary, so we move the end of the working range to the boundary point
// and measure the length of its text to get the boundary's offset within the node.
workingRange.setEndPoint(isStart ? "EndToStart" : "EndToEnd", textRange);
var offset;
if (/[\r\n]/.test(boundaryNode.data)) {
/*
For the particular case of a boundary within a text node containing line breaks (within a <pre> element,
for example), we need a slightly complicated approach to get the boundary's offset in IE. The facts:
- Each line break is represented as \r in the text node's data/nodeValue properties
- Each line break is represented as \r\n in the TextRange's 'text' property
- The 'text' property of the TextRange does not contain trailing line breaks
To get round the problem presented by the final fact above, we can use the fact that TextRange's
moveStart() and moveEnd() methods return the actual number of characters moved, which is not necessarily
the same as the number of characters it was instructed to move. The simplest approach is to use this to
store the characters moved when moving both the start and end of the range to the start of the document
body and subtracting the start offset from the end offset (the "move-negative-gazillion" method).
However, this is extremely slow when the document is large and the range is near the end of it. Clearly
doing the mirror image (i.e. moving the range boundaries to the end of the document) has the same
problem.
Another approach that works is to use moveStart() to move the start boundary of the range up to the end
boundary one character at a time and incrementing a counter with the value returned by the moveStart()
call. However, the check for whether the start boundary has reached the end boundary is expensive, so
this method is slow (although unlike "move-negative-gazillion" is largely unaffected by the location of
the range within the document).
The method below is a hybrid of the two methods above. It uses the fact that a string containing the
TextRange's 'text' property with each \r\n converted to a single \r character cannot be longer than the
text of the TextRange, so the start of the range is moved that length initially and then a character at
a time to make up for any trailing line breaks not contained in the 'text' property. This has good
performance in most situations compared to the previous two methods.
*/
var tempRange = workingRange.duplicate();
var rangeLength = tempRange.text.replace(/\r\n/g, "\r").length;
offset = tempRange.moveStart("character", rangeLength);
while ( (comparison = tempRange.compareEndPoints("StartToEnd", tempRange)) == -1) {
offset++;
tempRange.moveStart("character", 1);
}
} else {
offset = workingRange.text.length;
}
boundaryPosition = new DomPosition(boundaryNode, offset);
} else {
// If the boundary immediately follows a character data node and this is the end boundary, we should favour
// a position within that, and likewise for a start boundary preceding a character data node
previousNode = (isCollapsed || !isStart) && workingNode.previousSibling;
nextNode = (isCollapsed || isStart) && workingNode.nextSibling;
if (nextNode && dom.isCharacterDataNode(nextNode)) {
boundaryPosition = new DomPosition(nextNode, 0);
} else if (previousNode && dom.isCharacterDataNode(previousNode)) {
boundaryPosition = new DomPosition(previousNode, previousNode.length);
} else {
boundaryPosition = new DomPosition(containerElement, dom.getNodeIndex(workingNode));
}
}
// Clean up
workingNode.parentNode.removeChild(workingNode);
return boundaryPosition;
}
// Returns a TextRange representing the boundary of a TextRange expressed as a node and an offset within that node.
// This function started out as an optimized version of code found in Tim Cameron Ryan's IERange
// (http://code.google.com/p/ierange/)
function createBoundaryTextRange(boundaryPosition, isStart) {
var boundaryNode, boundaryParent, boundaryOffset = boundaryPosition.offset;
var doc = dom.getDocument(boundaryPosition.node);
var workingNode, childNodes, workingRange = doc.body.createTextRange();
var nodeIsDataNode = dom.isCharacterDataNode(boundaryPosition.node);
if (nodeIsDataNode) {
boundaryNode = boundaryPosition.node;
boundaryParent = boundaryNode.parentNode;
} else {
childNodes = boundaryPosition.node.childNodes;
boundaryNode = (boundaryOffset < childNodes.length) ? childNodes[boundaryOffset] : null;
boundaryParent = boundaryPosition.node;
}
// Position the range immediately before the node containing the boundary
workingNode = doc.createElement("span");
// Making the working element non-empty element persuades IE to consider the TextRange boundary to be within the
// element rather than immediately before or after it, which is what we want
workingNode.innerHTML = "&#feff;";
// insertBefore is supposed to work like appendChild if the second parameter is null. However, a bug report
// for IERange suggests that it can crash the browser: http://code.google.com/p/ierange/issues/detail?id=12
if (boundaryNode) {
boundaryParent.insertBefore(workingNode, boundaryNode);
} else {
boundaryParent.appendChild(workingNode);
}
workingRange.moveToElementText(workingNode);
workingRange.collapse(!isStart);
// Clean up
boundaryParent.removeChild(workingNode);
// Move the working range to the text offset, if required
if (nodeIsDataNode) {
workingRange[isStart ? "moveStart" : "moveEnd"]("character", boundaryOffset);
}
return workingRange;
}
/*----------------------------------------------------------------------------------------------------------------*/
if (api.features.implementsDomRange && (!api.features.implementsTextRange || !api.config.preferTextRange)) {
// This is a wrapper around the browser's native DOM Range. It has two aims:
// - Provide workarounds for specific browser bugs
// - provide convenient extensions, which are inherited from Rangy's DomRange
(function() {
var rangeProto;
var rangeProperties = DomRange.rangeProperties;
var canSetRangeStartAfterEnd;
function updateRangeProperties(range) {
var i = rangeProperties.length, prop;
while (i--) {
prop = rangeProperties[i];
range[prop] = range.nativeRange[prop];
}
}
function updateNativeRange(range, startContainer, startOffset, endContainer,endOffset) {
var startMoved = (range.startContainer !== startContainer || range.startOffset != startOffset);
var endMoved = (range.endContainer !== endContainer || range.endOffset != endOffset);
// Always set both boundaries for the benefit of IE9 (see issue 35)
if (startMoved || endMoved) {
range.setEnd(endContainer, endOffset);
range.setStart(startContainer, startOffset);
}
}
function detach(range) {
range.nativeRange.detach();
range.detached = true;
var i = rangeProperties.length, prop;
while (i--) {
prop = rangeProperties[i];
range[prop] = null;
}
}
var createBeforeAfterNodeSetter;
WrappedRange = function(range) {
if (!range) {
throw new Error("Range must be specified");
}
this.nativeRange = range;
updateRangeProperties(this);
};
DomRange.createPrototypeRange(WrappedRange, updateNativeRange, detach);
rangeProto = WrappedRange.prototype;
rangeProto.selectNode = function(node) {
this.nativeRange.selectNode(node);
updateRangeProperties(this);
};
rangeProto.deleteContents = function() {
this.nativeRange.deleteContents();
updateRangeProperties(this);
};
rangeProto.extractContents = function() {
var frag = this.nativeRange.extractContents();
updateRangeProperties(this);
return frag;
};
rangeProto.cloneContents = function() {
return this.nativeRange.cloneContents();
};
// TODO: Until I can find a way to programmatically trigger the Firefox bug (apparently long-standing, still
// present in 3.6.8) that throws "Index or size is negative or greater than the allowed amount" for
// insertNode in some circumstances, all browsers will have to use the Rangy's own implementation of
// insertNode, which works but is almost certainly slower than the native implementation.
/*
rangeProto.insertNode = function(node) {
this.nativeRange.insertNode(node);
updateRangeProperties(this);
};
*/
rangeProto.surroundContents = function(node) {
this.nativeRange.surroundContents(node);
updateRangeProperties(this);
};
rangeProto.collapse = function(isStart) {
this.nativeRange.collapse(isStart);
updateRangeProperties(this);
};
rangeProto.cloneRange = function() {
return new WrappedRange(this.nativeRange.cloneRange());
};
rangeProto.refresh = function() {
updateRangeProperties(this);
};
rangeProto.toString = function() {
return this.nativeRange.toString();
};
// Create test range and node for feature detection
var testTextNode = document.createTextNode("test");
dom.getBody(document).appendChild(testTextNode);
var range = document.createRange();
/*--------------------------------------------------------------------------------------------------------*/
// Test for Firefox 2 bug that prevents moving the start of a Range to a point after its current end and
// correct for it
range.setStart(testTextNode, 0);
range.setEnd(testTextNode, 0);
try {
range.setStart(testTextNode, 1);
canSetRangeStartAfterEnd = true;
rangeProto.setStart = function(node, offset) {
this.nativeRange.setStart(node, offset);
updateRangeProperties(this);
};
rangeProto.setEnd = function(node, offset) {
this.nativeRange.setEnd(node, offset);
updateRangeProperties(this);
};
createBeforeAfterNodeSetter = function(name) {
return function(node) {
this.nativeRange[name](node);
updateRangeProperties(this);
};
};
} catch(ex) {
canSetRangeStartAfterEnd = false;
rangeProto.setStart = function(node, offset) {
try {
this.nativeRange.setStart(node, offset);
} catch (ex) {
this.nativeRange.setEnd(node, offset);
this.nativeRange.setStart(node, offset);
}
updateRangeProperties(this);
};
rangeProto.setEnd = function(node, offset) {
try {
this.nativeRange.setEnd(node, offset);
} catch (ex) {
this.nativeRange.setStart(node, offset);
this.nativeRange.setEnd(node, offset);
}
updateRangeProperties(this);
};
createBeforeAfterNodeSetter = function(name, oppositeName) {
return function(node) {
try {
this.nativeRange[name](node);
} catch (ex) {
this.nativeRange[oppositeName](node);
this.nativeRange[name](node);
}
updateRangeProperties(this);
};
};
}
rangeProto.setStartBefore = createBeforeAfterNodeSetter("setStartBefore", "setEndBefore");
rangeProto.setStartAfter = createBeforeAfterNodeSetter("setStartAfter", "setEndAfter");
rangeProto.setEndBefore = createBeforeAfterNodeSetter("setEndBefore", "setStartBefore");
rangeProto.setEndAfter = createBeforeAfterNodeSetter("setEndAfter", "setStartAfter");
/*--------------------------------------------------------------------------------------------------------*/
// Test for and correct Firefox 2 behaviour with selectNodeContents on text nodes: it collapses the range to
// the 0th character of the text node
range.selectNodeContents(testTextNode);
if (range.startContainer == testTextNode && range.endContainer == testTextNode &&
range.startOffset == 0 && range.endOffset == testTextNode.length) {
rangeProto.selectNodeContents = function(node) {
this.nativeRange.selectNodeContents(node);
updateRangeProperties(this);
};
} else {
rangeProto.selectNodeContents = function(node) {
this.setStart(node, 0);
this.setEnd(node, DomRange.getEndOffset(node));
};
}
/*--------------------------------------------------------------------------------------------------------*/
// Test for WebKit bug that has the beahviour of compareBoundaryPoints round the wrong way for constants
// START_TO_END and END_TO_START: https://bugs.webkit.org/show_bug.cgi?id=20738
range.selectNodeContents(testTextNode);
range.setEnd(testTextNode, 3);
var range2 = document.createRange();
range2.selectNodeContents(testTextNode);
range2.setEnd(testTextNode, 4);
range2.setStart(testTextNode, 2);
if (range.compareBoundaryPoints(range.START_TO_END, range2) == -1 &
range.compareBoundaryPoints(range.END_TO_START, range2) == 1) {
// This is the wrong way round, so correct for it
rangeProto.compareBoundaryPoints = function(type, range) {
range = range.nativeRange || range;
if (type == range.START_TO_END) {
type = range.END_TO_START;
} else if (type == range.END_TO_START) {
type = range.START_TO_END;
}
return this.nativeRange.compareBoundaryPoints(type, range);
};
} else {
rangeProto.compareBoundaryPoints = function(type, range) {
return this.nativeRange.compareBoundaryPoints(type, range.nativeRange || range);
};
}
/*--------------------------------------------------------------------------------------------------------*/
// Test for existence of createContextualFragment and delegate to it if it exists
if (api.util.isHostMethod(range, "createContextualFragment")) {
rangeProto.createContextualFragment = function(fragmentStr) {
return this.nativeRange.createContextualFragment(fragmentStr);
};
}
/*--------------------------------------------------------------------------------------------------------*/
// Clean up
dom.getBody(document).removeChild(testTextNode);
range.detach();
range2.detach();
})();
api.createNativeRange = function(doc) {
doc = doc || document;
return doc.createRange();
};
} else if (api.features.implementsTextRange) {
// This is a wrapper around a TextRange, providing full DOM Range functionality using rangy's DomRange as a
// prototype
WrappedRange = function(textRange) {
this.textRange = textRange;
this.refresh();
};
WrappedRange.prototype = new DomRange(document);
WrappedRange.prototype.refresh = function() {
var start, end;
// TextRange's parentElement() method cannot be trusted. getTextRangeContainerElement() works around that.
var rangeContainerElement = getTextRangeContainerElement(this.textRange);
if (textRangeIsCollapsed(this.textRange)) {
end = start = getTextRangeBoundaryPosition(this.textRange, rangeContainerElement, true, true);
} else {
start = getTextRangeBoundaryPosition(this.textRange, rangeContainerElement, true, false);
end = getTextRangeBoundaryPosition(this.textRange, rangeContainerElement, false, false);
}
this.setStart(start.node, start.offset);
this.setEnd(end.node, end.offset);
};
DomRange.copyComparisonConstants(WrappedRange);
// Add WrappedRange as the Range property of the global object to allow expression like Range.END_TO_END to work
var globalObj = (function() { return this; })();
if (typeof globalObj.Range == "undefined") {
globalObj.Range = WrappedRange;
}
api.createNativeRange = function(doc) {
doc = doc || document;
return doc.body.createTextRange();
};
}
if (api.features.implementsTextRange) {
WrappedRange.rangeToTextRange = function(range) {
if (range.collapsed) {
var tr = createBoundaryTextRange(new DomPosition(range.startContainer, range.startOffset), true);
return tr;
//return createBoundaryTextRange(new DomPosition(range.startContainer, range.startOffset), true);
} else {
var startRange = createBoundaryTextRange(new DomPosition(range.startContainer, range.startOffset), true);
var endRange = createBoundaryTextRange(new DomPosition(range.endContainer, range.endOffset), false);
var textRange = dom.getDocument(range.startContainer).body.createTextRange();
textRange.setEndPoint("StartToStart", startRange);
textRange.setEndPoint("EndToEnd", endRange);
return textRange;
}
};
}
WrappedRange.prototype.getName = function() {
return "WrappedRange";
};
api.WrappedRange = WrappedRange;
api.createRange = function(doc) {
doc = doc || document;
return new WrappedRange(api.createNativeRange(doc));
};
api.createRangyRange = function(doc) {
doc = doc || document;
return new DomRange(doc);
};
api.createIframeRange = function(iframeEl) {
return api.createRange(dom.getIframeDocument(iframeEl));
};
api.createIframeRangyRange = function(iframeEl) {
return api.createRangyRange(dom.getIframeDocument(iframeEl));
};
api.addCreateMissingNativeApiListener(function(win) {
var doc = win.document;
if (typeof doc.createRange == "undefined") {
doc.createRange = function() {
return api.createRange(this);
};
}
doc = win = null;
});
});rangy.createModule("WrappedSelection", function(api, module) {
// This will create a selection object wrapper that follows the Selection object found in the WHATWG draft DOM Range
// spec (http://html5.org/specs/dom-range.html)
api.requireModules( ["DomUtil", "DomRange", "WrappedRange"] );
api.config.checkSelectionRanges = true;
var BOOLEAN = "boolean",
windowPropertyName = "_rangySelection",
dom = api.dom,
util = api.util,
DomRange = api.DomRange,
WrappedRange = api.WrappedRange,
DOMException = api.DOMException,
DomPosition = dom.DomPosition,
getSelection,
selectionIsCollapsed,
CONTROL = "Control";
function getWinSelection(winParam) {
return (winParam || window).getSelection();
}
function getDocSelection(winParam) {
return (winParam || window).document.selection;
}
// Test for the Range/TextRange and Selection features required
// Test for ability to retrieve selection
var implementsWinGetSelection = api.util.isHostMethod(window, "getSelection"),
implementsDocSelection = api.util.isHostObject(document, "selection");
var useDocumentSelection = implementsDocSelection && (!implementsWinGetSelection || api.config.preferTextRange);
if (useDocumentSelection) {
getSelection = getDocSelection;
api.isSelectionValid = function(winParam) {
var doc = (winParam || window).document, nativeSel = doc.selection;
// Check whether the selection TextRange is actually contained within the correct document
return (nativeSel.type != "None" || dom.getDocument(nativeSel.createRange().parentElement()) == doc);
};
} else if (implementsWinGetSelection) {
getSelection = getWinSelection;
api.isSelectionValid = function() {
return true;
};
} else {
module.fail("Neither document.selection or window.getSelection() detected.");
}
api.getNativeSelection = getSelection;
var testSelection = getSelection();
var testRange = api.createNativeRange(document);
var body = dom.getBody(document);
// Obtaining a range from a selection
var selectionHasAnchorAndFocus = util.areHostObjects(testSelection, ["anchorNode", "focusNode"] &&
util.areHostProperties(testSelection, ["anchorOffset", "focusOffset"]));
api.features.selectionHasAnchorAndFocus = selectionHasAnchorAndFocus;
// Test for existence of native selection extend() method
var selectionHasExtend = util.isHostMethod(testSelection, "extend");
api.features.selectionHasExtend = selectionHasExtend;
// Test if rangeCount exists
var selectionHasRangeCount = (typeof testSelection.rangeCount == "number");
api.features.selectionHasRangeCount = selectionHasRangeCount;
var selectionSupportsMultipleRanges = false;
var collapsedNonEditableSelectionsSupported = true;
if (util.areHostMethods(testSelection, ["addRange", "getRangeAt", "removeAllRanges"]) &&
typeof testSelection.rangeCount == "number" && api.features.implementsDomRange) {
(function() {
var iframe = document.createElement("iframe");
body.appendChild(iframe);
var iframeDoc = dom.getIframeDocument(iframe);
iframeDoc.open();
iframeDoc.write("<html><head></head><body>12</body></html>");
iframeDoc.close();
var sel = dom.getIframeWindow(iframe).getSelection();
var docEl = iframeDoc.documentElement;
var iframeBody = docEl.lastChild, textNode = iframeBody.firstChild;
// Test whether the native selection will allow a collapsed selection within a non-editable element
var r1 = iframeDoc.createRange();
r1.setStart(textNode, 1);
r1.collapse(true);
sel.addRange(r1);
collapsedNonEditableSelectionsSupported = (sel.rangeCount == 1);
sel.removeAllRanges();
// Test whether the native selection is capable of supporting multiple ranges
var r2 = r1.cloneRange();
r1.setStart(textNode, 0);
r2.setEnd(textNode, 2);
sel.addRange(r1);
sel.addRange(r2);
selectionSupportsMultipleRanges = (sel.rangeCount == 2);
// Clean up
r1.detach();
r2.detach();
body.removeChild(iframe);
})();
}
api.features.selectionSupportsMultipleRanges = selectionSupportsMultipleRanges;
api.features.collapsedNonEditableSelectionsSupported = collapsedNonEditableSelectionsSupported;
// ControlRanges
var implementsControlRange = false, testControlRange;
if (body && util.isHostMethod(body, "createControlRange")) {
testControlRange = body.createControlRange();
if (util.areHostProperties(testControlRange, ["item", "add"])) {
implementsControlRange = true;
}
}
api.features.implementsControlRange = implementsControlRange;
// Selection collapsedness
if (selectionHasAnchorAndFocus) {
selectionIsCollapsed = function(sel) {
return sel.anchorNode === sel.focusNode && sel.anchorOffset === sel.focusOffset;
};
} else {
selectionIsCollapsed = function(sel) {
return sel.rangeCount ? sel.getRangeAt(sel.rangeCount - 1).collapsed : false;
};
}
function updateAnchorAndFocusFromRange(sel, range, backwards) {
var anchorPrefix = backwards ? "end" : "start", focusPrefix = backwards ? "start" : "end";
sel.anchorNode = range[anchorPrefix + "Container"];
sel.anchorOffset = range[anchorPrefix + "Offset"];
sel.focusNode = range[focusPrefix + "Container"];
sel.focusOffset = range[focusPrefix + "Offset"];
}
function updateAnchorAndFocusFromNativeSelection(sel) {
var nativeSel = sel.nativeSelection;
sel.anchorNode = nativeSel.anchorNode;
sel.anchorOffset = nativeSel.anchorOffset;
sel.focusNode = nativeSel.focusNode;
sel.focusOffset = nativeSel.focusOffset;
}
function updateEmptySelection(sel) {
sel.anchorNode = sel.focusNode = null;
sel.anchorOffset = sel.focusOffset = 0;
sel.rangeCount = 0;
sel.isCollapsed = true;
sel._ranges.length = 0;
}
function getNativeRange(range) {
var nativeRange;
if (range instanceof DomRange) {
nativeRange = range._selectionNativeRange;
if (!nativeRange) {
nativeRange = api.createNativeRange(dom.getDocument(range.startContainer));
nativeRange.setEnd(range.endContainer, range.endOffset);
nativeRange.setStart(range.startContainer, range.startOffset);
range._selectionNativeRange = nativeRange;
range.attachListener("detach", function() {
this._selectionNativeRange = null;
});
}
} else if (range instanceof WrappedRange) {
nativeRange = range.nativeRange;
} else if (api.features.implementsDomRange && (range instanceof dom.getWindow(range.startContainer).Range)) {
nativeRange = range;
}
return nativeRange;
}
function rangeContainsSingleElement(rangeNodes) {
if (!rangeNodes.length || rangeNodes[0].nodeType != 1) {
return false;
}
for (var i = 1, len = rangeNodes.length; i < len; ++i) {
if (!dom.isAncestorOf(rangeNodes[0], rangeNodes[i])) {
return false;
}
}
return true;
}
function getSingleElementFromRange(range) {
var nodes = range.getNodes();
if (!rangeContainsSingleElement(nodes)) {
throw new Error("getSingleElementFromRange: range " + range.inspect() + " did not consist of a single element");
}
return nodes[0];
}
function isTextRange(range) {
return !!range && typeof range.text != "undefined";
}
function updateFromTextRange(sel, range) {
// Create a Range from the selected TextRange
var wrappedRange = new WrappedRange(range);
sel._ranges = [wrappedRange];
updateAnchorAndFocusFromRange(sel, wrappedRange, false);
sel.rangeCount = 1;
sel.isCollapsed = wrappedRange.collapsed;
}
function updateControlSelection(sel) {
// Update the wrapped selection based on what's now in the native selection
sel._ranges.length = 0;
if (sel.docSelection.type == "None") {
updateEmptySelection(sel);
} else {
var controlRange = sel.docSelection.createRange();
if (isTextRange(controlRange)) {
// This case (where the selection type is "Control" and calling createRange() on the selection returns
// a TextRange) can happen in IE 9. It happens, for example, when all elements in the selected
// ControlRange have been removed from the ControlRange and removed from the document.
updateFromTextRange(sel, controlRange);
} else {
sel.rangeCount = controlRange.length;
var range, doc = dom.getDocument(controlRange.item(0));
for (var i = 0; i < sel.rangeCount; ++i) {
range = api.createRange(doc);
range.selectNode(controlRange.item(i));
sel._ranges.push(range);
}
sel.isCollapsed = sel.rangeCount == 1 && sel._ranges[0].collapsed;
updateAnchorAndFocusFromRange(sel, sel._ranges[sel.rangeCount - 1], false);
}
}
}
function addRangeToControlSelection(sel, range) {
var controlRange = sel.docSelection.createRange();
var rangeElement = getSingleElementFromRange(range);
// Create a new ControlRange containing all the elements in the selected ControlRange plus the element
// contained by the supplied range
var doc = dom.getDocument(controlRange.item(0));
var newControlRange = dom.getBody(doc).createControlRange();
for (var i = 0, len = controlRange.length; i < len; ++i) {
newControlRange.add(controlRange.item(i));
}
try {
newControlRange.add(rangeElement);
} catch (ex) {
throw new Error("addRange(): Element within the specified Range could not be added to control selection (does it have layout?)");
}
newControlRange.select();
// Update the wrapped selection based on what's now in the native selection
updateControlSelection(sel);
}
var getSelectionRangeAt;
if (util.isHostMethod(testSelection, "getRangeAt")) {
getSelectionRangeAt = function(sel, index) {
try {
return sel.getRangeAt(index);
} catch(ex) {
return null;
}
};
} else if (selectionHasAnchorAndFocus) {
getSelectionRangeAt = function(sel) {
var doc = dom.getDocument(sel.anchorNode);
var range = api.createRange(doc);
range.setStart(sel.anchorNode, sel.anchorOffset);
range.setEnd(sel.focusNode, sel.focusOffset);
// Handle the case when the selection was selected backwards (from the end to the start in the
// document)
if (range.collapsed !== this.isCollapsed) {
range.setStart(sel.focusNode, sel.focusOffset);
range.setEnd(sel.anchorNode, sel.anchorOffset);
}
return range;
};
}
/**
* @constructor
*/
function WrappedSelection(selection, docSelection, win) {
this.nativeSelection = selection;
this.docSelection = docSelection;
this._ranges = [];
this.win = win;
this.refresh();
}
api.getSelection = function(win) {
win = win || window;
var sel = win[windowPropertyName];
var nativeSel = getSelection(win), docSel = implementsDocSelection ? getDocSelection(win) : null;
if (sel) {
sel.nativeSelection = nativeSel;
sel.docSelection = docSel;
sel.refresh(win);
} else {
sel = new WrappedSelection(nativeSel, docSel, win);
win[windowPropertyName] = sel;
}
return sel;
};
api.getIframeSelection = function(iframeEl) {
return api.getSelection(dom.getIframeWindow(iframeEl));
};
var selProto = WrappedSelection.prototype;
function createControlSelection(sel, ranges) {
// Ensure that the selection becomes of type "Control"
var doc = dom.getDocument(ranges[0].startContainer);
var controlRange = dom.getBody(doc).createControlRange();
for (var i = 0, el; i < rangeCount; ++i) {
el = getSingleElementFromRange(ranges[i]);
try {
controlRange.add(el);
} catch (ex) {
throw new Error("setRanges(): Element within the one of the specified Ranges could not be added to control selection (does it have layout?)");
}
}
controlRange.select();
// Update the wrapped selection based on what's now in the native selection
updateControlSelection(sel);
}
// Selecting a range
if (!useDocumentSelection && selectionHasAnchorAndFocus && util.areHostMethods(testSelection, ["removeAllRanges", "addRange"])) {
selProto.removeAllRanges = function() {
this.nativeSelection.removeAllRanges();
updateEmptySelection(this);
};
var addRangeBackwards = function(sel, range) {
var doc = DomRange.getRangeDocument(range);
var endRange = api.createRange(doc);
endRange.collapseToPoint(range.endContainer, range.endOffset);
sel.nativeSelection.addRange(getNativeRange(endRange));
sel.nativeSelection.extend(range.startContainer, range.startOffset);
sel.refresh();
};
if (selectionHasRangeCount) {
selProto.addRange = function(range, backwards) {
if (implementsControlRange && implementsDocSelection && this.docSelection.type == CONTROL) {
addRangeToControlSelection(this, range);
} else {
if (backwards && selectionHasExtend) {
addRangeBackwards(this, range);
} else {
var previousRangeCount;
if (selectionSupportsMultipleRanges) {
previousRangeCount = this.rangeCount;
} else {
this.removeAllRanges();
previousRangeCount = 0;
}
this.nativeSelection.addRange(getNativeRange(range));
// Check whether adding the range was successful
this.rangeCount = this.nativeSelection.rangeCount;
if (this.rangeCount == previousRangeCount + 1) {
// The range was added successfully
// Check whether the range that we added to the selection is reflected in the last range extracted from
// the selection
if (api.config.checkSelectionRanges) {
var nativeRange = getSelectionRangeAt(this.nativeSelection, this.rangeCount - 1);
if (nativeRange && !DomRange.rangesEqual(nativeRange, range)) {
// Happens in WebKit with, for example, a selection placed at the start of a text node
range = new WrappedRange(nativeRange);
}
}
this._ranges[this.rangeCount - 1] = range;
updateAnchorAndFocusFromRange(this, range, selectionIsBackwards(this.nativeSelection));
this.isCollapsed = selectionIsCollapsed(this);
} else {
// The range was not added successfully. The simplest thing is to refresh
this.refresh();
}
}
}
};
} else {
selProto.addRange = function(range, backwards) {
if (backwards && selectionHasExtend) {
addRangeBackwards(this, range);
} else {
this.nativeSelection.addRange(getNativeRange(range));
this.refresh();
}
};
}
selProto.setRanges = function(ranges) {
if (implementsControlRange && ranges.length > 1) {
createControlSelection(this, ranges);
} else {
this.removeAllRanges();
for (var i = 0, len = ranges.length; i < len; ++i) {
this.addRange(ranges[i]);
}
}
};
} else if (util.isHostMethod(testSelection, "empty") && util.isHostMethod(testRange, "select") &&
implementsControlRange && useDocumentSelection) {
selProto.removeAllRanges = function() {
// Added try/catch as fix for issue #21
try {
this.docSelection.empty();
// Check for empty() not working (issue #24)
if (this.docSelection.type != "None") {
// Work around failure to empty a control selection by instead selecting a TextRange and then
// calling empty()
var doc;
if (this.anchorNode) {
doc = dom.getDocument(this.anchorNode);
} else if (this.docSelection.type == CONTROL) {
var controlRange = this.docSelection.createRange();
if (controlRange.length) {
doc = dom.getDocument(controlRange.item(0)).body.createTextRange();
}
}
if (doc) {
var textRange = doc.body.createTextRange();
textRange.select();
this.docSelection.empty();
}
}
} catch(ex) {}
updateEmptySelection(this);
};
selProto.addRange = function(range) {
if (this.docSelection.type == CONTROL) {
addRangeToControlSelection(this, range);
} else {
WrappedRange.rangeToTextRange(range).select();
this._ranges[0] = range;
this.rangeCount = 1;
this.isCollapsed = this._ranges[0].collapsed;
updateAnchorAndFocusFromRange(this, range, false);
}
};
selProto.setRanges = function(ranges) {
this.removeAllRanges();
var rangeCount = ranges.length;
if (rangeCount > 1) {
createControlSelection(this, ranges);
} else if (rangeCount) {
this.addRange(ranges[0]);
}
};
} else {
module.fail("No means of selecting a Range or TextRange was found");
return false;
}
selProto.getRangeAt = function(index) {
if (index < 0 || index >= this.rangeCount) {
throw new DOMException("INDEX_SIZE_ERR");
} else {
return this._ranges[index];
}
};
var refreshSelection;
if (useDocumentSelection) {
refreshSelection = function(sel) {
var range;
if (api.isSelectionValid(sel.win)) {
range = sel.docSelection.createRange();
} else {
range = dom.getBody(sel.win.document).createTextRange();
range.collapse(true);
}
if (sel.docSelection.type == CONTROL) {
updateControlSelection(sel);
} else if (isTextRange(range)) {
updateFromTextRange(sel, range);
} else {
updateEmptySelection(sel);
}
};
} else if (util.isHostMethod(testSelection, "getRangeAt") && typeof testSelection.rangeCount == "number") {
refreshSelection = function(sel) {
if (implementsControlRange && implementsDocSelection && sel.docSelection.type == CONTROL) {
updateControlSelection(sel);
} else {
sel._ranges.length = sel.rangeCount = sel.nativeSelection.rangeCount;
if (sel.rangeCount) {
for (var i = 0, len = sel.rangeCount; i < len; ++i) {
sel._ranges[i] = new api.WrappedRange(sel.nativeSelection.getRangeAt(i));
}
updateAnchorAndFocusFromRange(sel, sel._ranges[sel.rangeCount - 1], selectionIsBackwards(sel.nativeSelection));
sel.isCollapsed = selectionIsCollapsed(sel);
} else {
updateEmptySelection(sel);
}
}
};
} else if (selectionHasAnchorAndFocus && typeof testSelection.isCollapsed == BOOLEAN && typeof testRange.collapsed == BOOLEAN && api.features.implementsDomRange) {
refreshSelection = function(sel) {
var range, nativeSel = sel.nativeSelection;
if (nativeSel.anchorNode) {
range = getSelectionRangeAt(nativeSel, 0);
sel._ranges = [range];
sel.rangeCount = 1;
updateAnchorAndFocusFromNativeSelection(sel);
sel.isCollapsed = selectionIsCollapsed(sel);
} else {
updateEmptySelection(sel);
}
};
} else {
module.fail("No means of obtaining a Range or TextRange from the user's selection was found");
return false;
}
selProto.refresh = function(checkForChanges) {
var oldRanges = checkForChanges ? this._ranges.slice(0) : null;
refreshSelection(this);
if (checkForChanges) {
var i = oldRanges.length;
if (i != this._ranges.length) {
return false;
}
while (i--) {
if (!DomRange.rangesEqual(oldRanges[i], this._ranges[i])) {
return false;
}
}
return true;
}
};
// Removal of a single range
var removeRangeManually = function(sel, range) {
var ranges = sel.getAllRanges(), removed = false;
sel.removeAllRanges();
for (var i = 0, len = ranges.length; i < len; ++i) {
if (removed || range !== ranges[i]) {
sel.addRange(ranges[i]);
} else {
// According to the draft WHATWG Range spec, the same range may be added to the selection multiple
// times. removeRange should only remove the first instance, so the following ensures only the first
// instance is removed
removed = true;
}
}
if (!sel.rangeCount) {
updateEmptySelection(sel);
}
};
if (implementsControlRange) {
selProto.removeRange = function(range) {
if (this.docSelection.type == CONTROL) {
var controlRange = this.docSelection.createRange();
var rangeElement = getSingleElementFromRange(range);
// Create a new ControlRange containing all the elements in the selected ControlRange minus the
// element contained by the supplied range
var doc = dom.getDocument(controlRange.item(0));
var newControlRange = dom.getBody(doc).createControlRange();
var el, removed = false;
for (var i = 0, len = controlRange.length; i < len; ++i) {
el = controlRange.item(i);
if (el !== rangeElement || removed) {
newControlRange.add(controlRange.item(i));
} else {
removed = true;
}
}
newControlRange.select();
// Update the wrapped selection based on what's now in the native selection
updateControlSelection(this);
} else {
removeRangeManually(this, range);
}
};
} else {
selProto.removeRange = function(range) {
removeRangeManually(this, range);
};
}
// Detecting if a selection is backwards
var selectionIsBackwards;
if (!useDocumentSelection && selectionHasAnchorAndFocus && api.features.implementsDomRange) {
selectionIsBackwards = function(sel) {
var backwards = false;
if (sel.anchorNode) {
backwards = (dom.comparePoints(sel.anchorNode, sel.anchorOffset, sel.focusNode, sel.focusOffset) == 1);
}
return backwards;
};
selProto.isBackwards = function() {
return selectionIsBackwards(this);
};
} else {
selectionIsBackwards = selProto.isBackwards = function() {
return false;
};
}
// Selection text
// This is conformant to the new WHATWG DOM Range draft spec but differs from WebKit and Mozilla's implementation
selProto.toString = function() {
var rangeTexts = [];
for (var i = 0, len = this.rangeCount; i < len; ++i) {
rangeTexts[i] = "" + this._ranges[i];
}
return rangeTexts.join("");
};
function assertNodeInSameDocument(sel, node) {
if (sel.anchorNode && (dom.getDocument(sel.anchorNode) !== dom.getDocument(node))) {
throw new DOMException("WRONG_DOCUMENT_ERR");
}
}
// No current browsers conform fully to the HTML 5 draft spec for this method, so Rangy's own method is always used
selProto.collapse = function(node, offset) {
assertNodeInSameDocument(this, node);
var range = api.createRange(dom.getDocument(node));
range.collapseToPoint(node, offset);
this.removeAllRanges();
this.addRange(range);
this.isCollapsed = true;
};
selProto.collapseToStart = function() {
if (this.rangeCount) {
var range = this._ranges[0];
this.collapse(range.startContainer, range.startOffset);
} else {
throw new DOMException("INVALID_STATE_ERR");
}
};
selProto.collapseToEnd = function() {
if (this.rangeCount) {
var range = this._ranges[this.rangeCount - 1];
this.collapse(range.endContainer, range.endOffset);
} else {
throw new DOMException("INVALID_STATE_ERR");
}
};
// The HTML 5 spec is very specific on how selectAllChildren should be implemented so the native implementation is
// never used by Rangy.
selProto.selectAllChildren = function(node) {
assertNodeInSameDocument(this, node);
var range = api.createRange(dom.getDocument(node));
range.selectNodeContents(node);
this.removeAllRanges();
this.addRange(range);
};
selProto.deleteFromDocument = function() {
// Sepcial behaviour required for Control selections
if (implementsControlRange && implementsDocSelection && this.docSelection.type == CONTROL) {
var controlRange = this.docSelection.createRange();
var element;
while (controlRange.length) {
element = controlRange.item(0);
controlRange.remove(element);
element.parentNode.removeChild(element);
}
this.refresh();
} else if (this.rangeCount) {
var ranges = this.getAllRanges();
this.removeAllRanges();
for (var i = 0, len = ranges.length; i < len; ++i) {
ranges[i].deleteContents();
}
// The HTML5 spec says nothing about what the selection should contain after calling deleteContents on each
// range. Firefox moves the selection to where the final selected range was, so we emulate that
this.addRange(ranges[len - 1]);
}
};
// The following are non-standard extensions
selProto.getAllRanges = function() {
return this._ranges.slice(0);
};
selProto.setSingleRange = function(range) {
this.setRanges( [range] );
};
selProto.containsNode = function(node, allowPartial) {
for (var i = 0, len = this._ranges.length; i < len; ++i) {
if (this._ranges[i].containsNode(node, allowPartial)) {
return true;
}
}
return false;
};
selProto.toHtml = function() {
var html = "";
if (this.rangeCount) {
var container = DomRange.getRangeDocument(this._ranges[0]).createElement("div");
for (var i = 0, len = this._ranges.length; i < len; ++i) {
container.appendChild(this._ranges[i].cloneContents());
}
html = container.innerHTML;
}
return html;
};
function inspect(sel) {
var rangeInspects = [];
var anchor = new DomPosition(sel.anchorNode, sel.anchorOffset);
var focus = new DomPosition(sel.focusNode, sel.focusOffset);
var name = (typeof sel.getName == "function") ? sel.getName() : "Selection";
if (typeof sel.rangeCount != "undefined") {
for (var i = 0, len = sel.rangeCount; i < len; ++i) {
rangeInspects[i] = DomRange.inspect(sel.getRangeAt(i));
}
}
return "[" + name + "(Ranges: " + rangeInspects.join(", ") +
")(anchor: " + anchor.inspect() + ", focus: " + focus.inspect() + "]";
}
selProto.getName = function() {
return "WrappedSelection";
};
selProto.inspect = function() {
return inspect(this);
};
selProto.detach = function() {
this.win[windowPropertyName] = null;
this.win = this.anchorNode = this.focusNode = null;
};
WrappedSelection.inspect = inspect;
api.Selection = WrappedSelection;
api.selectionPrototype = selProto;
api.addCreateMissingNativeApiListener(function(win) {
if (typeof win.getSelection == "undefined") {
win.getSelection = function() {
return api.getSelection(this);
};
}
win = null;
});
});
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