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您需要先安装一个扩展,例如 篡改猴 或 暴力猴,之后才能安装此脚本。
您需要先安装一个扩展,例如 篡改猴 或 暴力猴,之后才能安装此脚本。
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Cross-broswer implementation of text ranges and selections
此脚本不应直接安装。它是供其他脚本使用的外部库,要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/14098/88786/bililiteRangejs.js
- // Cross-broswer implementation of text ranges and selections
- // documentation: http://bililite.com/blog/2011/01/17/cross-browser-text-ranges-and-selections/
- // Version: 2.6
- // Copyright (c) 2013 Daniel Wachsstock
- // MIT license:
- // Permission is hereby granted, free of charge, to any person
- // obtaining a copy of this software and associated documentation
- // files (the "Software"), to deal in the Software without
- // restriction, including without limitation the rights to use,
- // copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the
- // Software is furnished to do so, subject to the following
- // conditions:
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- // OTHER DEALINGS IN THE SOFTWARE.
- (function(){
- // a bit of weirdness with IE11: using 'focus' is flaky, even if I'm not bubbling, as far as I can tell.
- var focusEvent = 'onfocusin' in document.createElement('input') ? 'focusin' : 'focus';
- // IE11 normalize is buggy (http://connect.microsoft.com/IE/feedback/details/809424/node-normalize-removes-text-if-dashes-are-present)
- var n = document.createElement('div');
- n.appendChild(document.createTextNode('x-'));
- n.appendChild(document.createTextNode('x'));
- n.normalize();
- var canNormalize = n.firstChild.length == 3;
- bililiteRange = function(el, debug){
- var ret;
- if (debug){
- ret = new NothingRange(); // Easier to force it to use the no-selection type than to try to find an old browser
- }else if (window.getSelection && el.setSelectionRange){
- // Standards. Element is an input or textarea
- // note that some input elements do not allow selections
- try{
- el.selectionStart; // even getting the selection in such an element will throw
- ret = new InputRange();
- }catch(e){
- ret = new NothingRange();
- }
- }else if (window.getSelection){
- // Standards, with any other kind of element
- ret = new W3CRange();
- }else if (document.selection){
- // Internet Explorer
- ret = new IERange();
- }else{
- // doesn't support selection
- ret = new NothingRange();
- }
- ret._el = el;
- // determine parent document, as implemented by John McLear <john@mclear.co.uk>
- ret._doc = el.ownerDocument;
- ret._win = 'defaultView' in ret._doc ? ret._doc.defaultView : ret._doc.parentWindow;
- ret._textProp = textProp(el);
- ret._bounds = [0, ret.length()];
- // There's no way to detect whether a focus event happened as a result of a click (which should change the selection)
- // or as a result of a keyboard event (a tab in) or a script action (el.focus()). So we track it globally, which is a hack, and is likely to fail
- // in edge cases (right-clicks, drag-n-drop), and is vulnerable to a lower-down handler preventing bubbling.
- // I just don't know a better way.
- // I'll hack my event-listening code below, rather than create an entire new bilililiteRange, potentially before the DOM has loaded
- if (!('bililiteRangeMouseDown' in ret._doc)){
- var _doc = {_el: ret._doc};
- ret._doc.bililiteRangeMouseDown = false;
- bililiteRange.fn.listen.call(_doc, 'mousedown', function() {
- ret._doc.bililiteRangeMouseDown = true;
- });
- bililiteRange.fn.listen.call(_doc, 'mouseup', function() {
- ret._doc.bililiteRangeMouseDown = false;
- });
- }
- // note that bililiteRangeSelection is an array, which means that copying it only copies the address, which points to the original.
- // make sure that we never let it (always do return [bililiteRangeSelection[0], bililiteRangeSelection[1]]), which means never returning
- // this._bounds directly
- if (!('bililiteRangeSelection' in el)){
- // start tracking the selection
- function trackSelection(evt){
- if (evt && evt.which == 9){
- // do tabs my way, by restoring the selection
- // there's a flash of the browser's selection, but I don't see a way of avoiding that
- ret._nativeSelect(ret._nativeRange(el.bililiteRangeSelection));
- }else{
- el.bililiteRangeSelection = ret._nativeSelection();
- }
- }
- trackSelection();
- // only IE does this right and allows us to grab the selection before blurring
- if ('onbeforedeactivate' in el){
- ret.listen('beforedeactivate', trackSelection);
- }else{
- // with standards-based browsers, have to listen for every user interaction
- ret.listen('mouseup', trackSelection).listen('keyup', trackSelection);
- }
- ret.listen(focusEvent, function(){
- // restore the correct selection when the element comes into focus (mouse clicks change the position of the selection)
- // Note that Firefox will not fire the focus event until the window/tab is active even if el.focus() is called
- // https://bugzilla.mozilla.org/show_bug.cgi?id=566671
- if (!ret._doc.bililiteRangeMouseDown){
- ret._nativeSelect(ret._nativeRange(el.bililiteRangeSelection));
- }
- });
- }
- if (!('oninput' in el)){
- // give IE8 a chance. Note that this still fails in IE11, which has has oninput on contenteditable elements but does not
- // dispatch input events. See http://connect.microsoft.com/IE/feedback/details/794285/ie10-11-input-event-does-not-fire-on-div-with-contenteditable-set
- // TODO: revisit this when I have IE11 running on my development machine
- var inputhack = function() {ret.dispatch({type: 'input', bubbles: true}) };
- ret.listen('keyup', inputhack);
- ret.listen('cut', inputhack);
- ret.listen('paste', inputhack);
- ret.listen('drop', inputhack);
- el.oninput = 'patched';
- }
- return ret;
- }
- function textProp(el){
- // returns the property that contains the text of the element
- // note that for <body> elements the text attribute represents the obsolete text color, not the textContent.
- // we document that these routines do not work for <body> elements so that should not be relevant
- if (typeof el.value != 'undefined') return 'value';
- if (typeof el.text != 'undefined') return 'text';
- if (typeof el.textContent != 'undefined') return 'textContent';
- return 'innerText';
- }
- // base class
- function Range(){}
- Range.prototype = {
- length: function() {
- return this._el[this._textProp].replace(/\r/g, '').length; // need to correct for IE's CrLf weirdness
- },
- bounds: function(s){
- if (bililiteRange.bounds[s]){
- this._bounds = bililiteRange.bounds[s].apply(this);
- }else if (s){
- this._bounds = s; // don't do error checking now; things may change at a moment's notice
- }else{
- var b = [
- Math.max(0, Math.min (this.length(), this._bounds[0])),
- Math.max(0, Math.min (this.length(), this._bounds[1]))
- ];
- b[1] = Math.max(b[0], b[1]);
- return b; // need to constrain it to fit
- }
- return this; // allow for chaining
- },
- select: function(){
- var b = this._el.bililiteRangeSelection = this.bounds();
- if (this._el === this._doc.activeElement){
- // only actually select if this element is active!
- this._nativeSelect(this._nativeRange(b));
- }
- this.dispatch({type: 'select', bubbles: true});
- return this; // allow for chaining
- },
- text: function(text, select){
- if (arguments.length){
- var bounds = this.bounds(), el = this._el;
- // signal the input per DOM 3 input events, http://www.w3.org/TR/DOM-Level-3-Events/#h4_events-inputevents
- // we add another field, bounds, which are the bounds of the original text before being changed.
- this.dispatch({type: 'beforeinput', bubbles: true,
- data: text, bounds: bounds});
- this._nativeSetText(text, this._nativeRange(bounds));
- if (select == 'start'){
- this.bounds ([bounds[0], bounds[0]]);
- }else if (select == 'end'){
- this.bounds ([bounds[0]+text.length, bounds[0]+text.length]);
- }else if (select == 'all'){
- this.bounds ([bounds[0], bounds[0]+text.length]);
- }
- this.dispatch({type: 'input', bubbles: true,
- data: text, bounds: bounds});
- return this; // allow for chaining
- }else{
- return this._nativeGetText(this._nativeRange(this.bounds())).replace(/\r/g, ''); // need to correct for IE's CrLf weirdness
- }
- },
- insertEOL: function (){
- this._nativeEOL();
- this._bounds = [this._bounds[0]+1, this._bounds[0]+1]; // move past the EOL marker
- return this;
- },
- sendkeys: function (text){
- var self = this;
- this.data().sendkeysOriginalText = this.text();
- this.data().sendkeysBounds = undefined;
- function simplechar (rng, c){
- if (/^{[^}]*}$/.test(c)) c = c.slice(1,-1); // deal with unknown {key}s
- for (var i =0; i < c.length; ++i){
- var x = c.charCodeAt(i);
- rng.dispatch({type: 'keypress', bubbles: true, keyCode: x, which: x, charCode: x});
- }
- rng.text(c, 'end');
- }
- text.replace(/{[^}]*}|[^{]+|{/g, function(part){
- (bililiteRange.sendkeys[part] || simplechar)(self, part, simplechar);
- });
- this.bounds(this.data().sendkeysBounds);
- this.dispatch({type: 'sendkeys', which: text});
- return this;
- },
- top: function(){
- return this._nativeTop(this._nativeRange(this.bounds()));
- },
- scrollIntoView: function(scroller){
- var top = this.top();
- // scroll into position if necessary
- if (this._el.scrollTop > top || this._el.scrollTop+this._el.clientHeight < top){
- if (scroller){
- scroller.call(this._el, top);
- }else{
- this._el.scrollTop = top;
- }
- }
- return this;
- },
- wrap: function (n){
- this._nativeWrap(n, this._nativeRange(this.bounds()));
- return this;
- },
- selection: function(text){
- if (arguments.length){
- return this.bounds('selection').text(text, 'end').select();
- }else{
- return this.bounds('selection').text();
- }
- },
- clone: function(){
- return bililiteRange(this._el).bounds(this.bounds());
- },
- all: function(text){
- if (arguments.length){
- this.dispatch ({type: 'beforeinput', bubbles: true, data: text});
- this._el[this._textProp] = text;
- this.dispatch ({type: 'input', bubbles: true, data: text});
- return this;
- }else{
- return this._el[this._textProp].replace(/\r/g, ''); // need to correct for IE's CrLf weirdness
- }
- },
- element: function() { return this._el },
- // includes a quickie polyfill for CustomEvent for IE that isn't perfect but works for me
- // IE10 allows custom events but not "new CustomEvent"; have to do it the old-fashioned way
- dispatch: function(opts){
- opts = opts || {};
- var event = document.createEvent ? document.createEvent('CustomEvent') : this._doc.createEventObject();
- event.initCustomEvent && event.initCustomEvent(opts.type, !!opts.bubbles, !!opts.cancelable, opts.detail);
- for (var key in opts) event[key] = opts[key];
- // dispatch event asynchronously (in the sense of on the next turn of the event loop; still should be fired in order of dispatch
- var el = this._el;
- setTimeout(function(){
- try {
- el.dispatchEvent ? el.dispatchEvent(event) : el.fireEvent("on" + opts.type, document.createEventObject());
- }catch(e){
- // IE8 will not let me fire custom events at all. Call them directly
- var listeners = el['listen'+opts.type];
- if (listeners) for (var i = 0; i < listeners.length; ++i){
- listeners[i].call(el, event);
- }
- }
- }, 0);
- return this;
- },
- listen: function (type, func){
- var el = this._el;
- if (el.addEventListener){
- el.addEventListener(type, func);
- }else{
- el.attachEvent("on" + type, func);
- // IE8 can't even handle custom events created with createEventObject (though it permits attachEvent), so we have to make our own
- var listeners = el['listen'+type] = el['listen'+type] || [];
- listeners.push(func);
- }
- return this;
- },
- dontlisten: function (type, func){
- var el = this._el;
- if (el.removeEventListener){
- el.removeEventListener(type, func);
- }else try{
- el.detachEvent("on" + type, func);
- }catch(e){
- var listeners = el['listen'+type];
- if (listeners) for (var i = 0; i < listeners.length; ++i){
- if (listeners[i] === func) listeners[i] = function(){}; // replace with a noop
- }
- }
- return this;
- }
- };
- // allow extensions ala jQuery
- bililiteRange.fn = Range.prototype; // to allow monkey patching
- bililiteRange.extend = function(fns){
- for (fn in fns) Range.prototype[fn] = fns[fn];
- };
- //bounds functions
- bililiteRange.bounds = {
- all: function() { return [0, this.length()] },
- start: function () { return [0,0] },
- end: function () { return [this.length(), this.length()] },
- selection: function(){
- if (this._el === this._doc.activeElement){
- this.bounds ('all'); // first select the whole thing for constraining
- return this._nativeSelection();
- }else{
- return this._el.bililiteRangeSelection;
- }
- }
- };
- // sendkeys functions
- bililiteRange.sendkeys = {
- '{enter}': function (rng){
- rng.dispatch({type: 'keypress', bubbles: true, keyCode: '\n', which: '\n', charCode: '\n'});
- rng.insertEOL();
- },
- '{tab}': function (rng, c, simplechar){
- simplechar(rng, '\t'); // useful for inserting what would be whitespace
- },
- '{newline}': function (rng, c, simplechar){
- simplechar(rng, '\n'); // useful for inserting what would be whitespace (and if I don't want to use insertEOL, which does some fancy things)
- },
- '{backspace}': function (rng){
- var b = rng.bounds();
- if (b[0] == b[1]) rng.bounds([b[0]-1, b[0]]); // no characters selected; it's just an insertion point. Remove the previous character
- rng.text('', 'end'); // delete the characters and update the selection
- },
- '{del}': function (rng){
- var b = rng.bounds();
- if (b[0] == b[1]) rng.bounds([b[0], b[0]+1]); // no characters selected; it's just an insertion point. Remove the next character
- rng.text('', 'end'); // delete the characters and update the selection
- },
- '{rightarrow}': function (rng){
- var b = rng.bounds();
- if (b[0] == b[1]) ++b[1]; // no characters selected; it's just an insertion point. Move to the right
- rng.bounds([b[1], b[1]]);
- },
- '{leftarrow}': function (rng){
- var b = rng.bounds();
- if (b[0] == b[1]) --b[0]; // no characters selected; it's just an insertion point. Move to the left
- rng.bounds([b[0], b[0]]);
- },
- '{selectall}' : function (rng){
- rng.bounds('all');
- },
- '{selection}': function (rng){
- // insert the characters without the sendkeys processing
- var s = rng.data().sendkeysOriginalText;
- for (var i =0; i < s.length; ++i){
- var x = s.charCodeAt(i);
- rng.dispatch({type: 'keypress', bubbles: true, keyCode: x, which: x, charCode: x});
- }
- rng.text(s, 'end');
- },
- '{mark}' : function (rng){
- rng.data().sendkeysBounds = rng.bounds();
- }
- };
- // Synonyms from the proposed DOM standard (http://www.w3.org/TR/DOM-Level-3-Events-key/)
- bililiteRange.sendkeys['{Enter}'] = bililiteRange.sendkeys['{enter}'];
- bililiteRange.sendkeys['{Backspace}'] = bililiteRange.sendkeys['{backspace}'];
- bililiteRange.sendkeys['{Delete}'] = bililiteRange.sendkeys['{del}'];
- bililiteRange.sendkeys['{ArrowRight}'] = bililiteRange.sendkeys['{rightarrow}'];
- bililiteRange.sendkeys['{ArrowLeft}'] = bililiteRange.sendkeys['{leftarrow}'];
- function IERange(){}
- IERange.prototype = new Range();
- IERange.prototype._nativeRange = function (bounds){
- var rng;
- if (this._el.tagName == 'INPUT'){
- // IE 8 is very inconsistent; textareas have createTextRange but it doesn't work
- rng = this._el.createTextRange();
- }else{
- rng = this._doc.body.createTextRange ();
- rng.moveToElementText(this._el);
- }
- if (bounds){
- if (bounds[1] < 0) bounds[1] = 0; // IE tends to run elements out of bounds
- if (bounds[0] > this.length()) bounds[0] = this.length();
- if (bounds[1] < rng.text.replace(/\r/g, '').length){ // correct for IE's CrLf weirdness
- // block-display elements have an invisible, uncounted end of element marker, so we move an extra one and use the current length of the range
- rng.moveEnd ('character', -1);
- rng.moveEnd ('character', bounds[1]-rng.text.replace(/\r/g, '').length);
- }
- if (bounds[0] > 0) rng.moveStart('character', bounds[0]);
- }
- return rng;
- };
- IERange.prototype._nativeSelect = function (rng){
- rng.select();
- };
- IERange.prototype._nativeSelection = function (){
- // returns [start, end] for the selection constrained to be in element
- var rng = this._nativeRange(); // range of the element to constrain to
- var len = this.length();
- var sel = this._doc.selection.createRange();
- try{
- return [
- iestart(sel, rng),
- ieend (sel, rng)
- ];
- }catch (e){
- // TODO: determine if this is still necessary, since we only call _nativeSelection if _el is active
- // IE gets upset sometimes about comparing text to input elements, but the selections cannot overlap, so make a best guess
- return (sel.parentElement().sourceIndex < this._el.sourceIndex) ? [0,0] : [len, len];
- }
- };
- IERange.prototype._nativeGetText = function (rng){
- return rng.text;
- };
- IERange.prototype._nativeSetText = function (text, rng){
- rng.text = text;
- };
- IERange.prototype._nativeEOL = function(){
- if ('value' in this._el){
- this.text('\n'); // for input and textarea, insert it straight
- }else{
- this._nativeRange(this.bounds()).pasteHTML('\n<br/>');
- }
- };
- IERange.prototype._nativeTop = function(rng){
- var startrng = this._nativeRange([0,0]);
- return rng.boundingTop - startrng.boundingTop;
- }
- IERange.prototype._nativeWrap = function(n, rng) {
- // hacky to use string manipulation but I don't see another way to do it.
- var div = document.createElement('div');
- div.appendChild(n);
- // insert the existing range HTML after the first tag
- var html = div.innerHTML.replace('><', '>'+rng.htmlText+'<');
- rng.pasteHTML(html);
- };
- // IE internals
- function iestart(rng, constraint){
- // returns the position (in character) of the start of rng within constraint. If it's not in constraint, returns 0 if it's before, length if it's after
- var len = constraint.text.replace(/\r/g, '').length; // correct for IE's CrLf weirdness
- if (rng.compareEndPoints ('StartToStart', constraint) <= 0) return 0; // at or before the beginning
- if (rng.compareEndPoints ('StartToEnd', constraint) >= 0) return len;
- for (var i = 0; rng.compareEndPoints ('StartToStart', constraint) > 0; ++i, rng.moveStart('character', -1));
- return i;
- }
- function ieend (rng, constraint){
- // returns the position (in character) of the end of rng within constraint. If it's not in constraint, returns 0 if it's before, length if it's after
- var len = constraint.text.replace(/\r/g, '').length; // correct for IE's CrLf weirdness
- if (rng.compareEndPoints ('EndToEnd', constraint) >= 0) return len; // at or after the end
- if (rng.compareEndPoints ('EndToStart', constraint) <= 0) return 0;
- for (var i = 0; rng.compareEndPoints ('EndToStart', constraint) > 0; ++i, rng.moveEnd('character', -1));
- return i;
- }
- // an input element in a standards document. "Native Range" is just the bounds array
- function InputRange(){}
- InputRange.prototype = new Range();
- InputRange.prototype._nativeRange = function(bounds) {
- return bounds || [0, this.length()];
- };
- InputRange.prototype._nativeSelect = function (rng){
- this._el.setSelectionRange(rng[0], rng[1]);
- };
- InputRange.prototype._nativeSelection = function(){
- return [this._el.selectionStart, this._el.selectionEnd];
- };
- InputRange.prototype._nativeGetText = function(rng){
- return this._el.value.substring(rng[0], rng[1]);
- };
- InputRange.prototype._nativeSetText = function(text, rng){
- var val = this._el.value;
- this._el.value = val.substring(0, rng[0]) + text + val.substring(rng[1]);
- };
- InputRange.prototype._nativeEOL = function(){
- this.text('\n');
- };
- InputRange.prototype._nativeTop = function(rng){
- // I can't remember where I found this clever hack to find the location of text in a text area
- var clone = this._el.cloneNode(true);
- clone.style.visibility = 'hidden';
- clone.style.position = 'absolute';
- this._el.parentNode.insertBefore(clone, this._el);
- clone.style.height = '1px';
- clone.value = this._el.value.slice(0, rng[0]);
- var top = clone.scrollHeight;
- // this gives the bottom of the text, so we have to subtract the height of a single line
- clone.value = 'X';
- top -= clone.scrollHeight;
- clone.parentNode.removeChild(clone);
- return top;
- }
- InputRange.prototype._nativeWrap = function() {throw new Error("Cannot wrap in a text element")};
- function W3CRange(){}
- W3CRange.prototype = new Range();
- W3CRange.prototype._nativeRange = function (bounds){
- var rng = this._doc.createRange();
- rng.selectNodeContents(this._el);
- if (bounds){
- w3cmoveBoundary (rng, bounds[0], true, this._el);
- rng.collapse (true);
- w3cmoveBoundary (rng, bounds[1]-bounds[0], false, this._el);
- }
- return rng;
- };
- W3CRange.prototype._nativeSelect = function (rng){
- this._win.getSelection().removeAllRanges();
- this._win.getSelection().addRange (rng);
- };
- W3CRange.prototype._nativeSelection = function (){
- // returns [start, end] for the selection constrained to be in element
- var rng = this._nativeRange(); // range of the element to constrain to
- if (this._win.getSelection().rangeCount == 0) return [this.length(), this.length()]; // append to the end
- var sel = this._win.getSelection().getRangeAt(0);
- return [
- w3cstart(sel, rng),
- w3cend (sel, rng)
- ];
- }
- W3CRange.prototype._nativeGetText = function (rng){
- return String.prototype.slice.apply(this._el.textContent, this.bounds());
- // return rng.toString(); // this fails in IE11 since it insists on inserting \r's before \n's in Ranges. node.textContent works as expected
- };
- W3CRange.prototype._nativeSetText = function (text, rng){
- rng.deleteContents();
- rng.insertNode (this._doc.createTextNode(text));
- if (canNormalize) this._el.normalize(); // merge the text with the surrounding text
- };
- W3CRange.prototype._nativeEOL = function(){
- var rng = this._nativeRange(this.bounds());
- rng.deleteContents();
- var br = this._doc.createElement('br');
- br.setAttribute ('_moz_dirty', ''); // for Firefox
- rng.insertNode (br);
- rng.insertNode (this._doc.createTextNode('\n'));
- rng.collapse (false);
- };
- W3CRange.prototype._nativeTop = function(rng){
- if (this.length == 0) return 0; // no text, no scrolling
- if (rng.toString() == ''){
- var textnode = this._doc.createTextNode('X');
- rng.insertNode (textnode);
- }
- var startrng = this._nativeRange([0,1]);
- var top = rng.getBoundingClientRect().top - startrng.getBoundingClientRect().top;
- if (textnode) textnode.parentNode.removeChild(textnode);
- return top;
- }
- W3CRange.prototype._nativeWrap = function(n, rng) {
- rng.surroundContents(n);
- };
- // W3C internals
- function nextnode (node, root){
- // in-order traversal
- // we've already visited node, so get kids then siblings
- if (node.firstChild) return node.firstChild;
- if (node.nextSibling) return node.nextSibling;
- if (node===root) return null;
- while (node.parentNode){
- // get uncles
- node = node.parentNode;
- if (node == root) return null;
- if (node.nextSibling) return node.nextSibling;
- }
- return null;
- }
- function w3cmoveBoundary (rng, n, bStart, el){
- // move the boundary (bStart == true ? start : end) n characters forward, up to the end of element el. Forward only!
- // if the start is moved after the end, then an exception is raised
- if (n <= 0) return;
- var node = rng[bStart ? 'startContainer' : 'endContainer'];
- if (node.nodeType == 3){
- // we may be starting somewhere into the text
- n += rng[bStart ? 'startOffset' : 'endOffset'];
- }
- while (node){
- if (node.nodeType == 3){
- var length = node.nodeValue.length;
- if (n <= length){
- rng[bStart ? 'setStart' : 'setEnd'](node, n);
- // special case: if we end next to a <br>, include that node.
- if (n == length){
- // skip past zero-length text nodes
- for (var next = nextnode (node, el); next && next.nodeType==3 && next.nodeValue.length == 0; next = nextnode(next, el)){
- rng[bStart ? 'setStartAfter' : 'setEndAfter'](next);
- }
- if (next && next.nodeType == 1 && next.nodeName == "BR") rng[bStart ? 'setStartAfter' : 'setEndAfter'](next);
- }
- return;
- }else{
- rng[bStart ? 'setStartAfter' : 'setEndAfter'](node); // skip past this one
- n -= length; // and eat these characters
- }
- }
- node = nextnode (node, el);
- }
- }
- var START_TO_START = 0; // from the w3c definitions
- var START_TO_END = 1;
- var END_TO_END = 2;
- var END_TO_START = 3;
- // from the Mozilla documentation, for range.compareBoundaryPoints(how, sourceRange)
- // -1, 0, or 1, indicating whether the corresponding boundary-point of range is respectively before, equal to, or after the corresponding boundary-point of sourceRange.
- // * Range.END_TO_END compares the end boundary-point of sourceRange to the end boundary-point of range.
- // * Range.END_TO_START compares the end boundary-point of sourceRange to the start boundary-point of range.
- // * Range.START_TO_END compares the start boundary-point of sourceRange to the end boundary-point of range.
- // * Range.START_TO_START compares the start boundary-point of sourceRange to the start boundary-point of range.
- function w3cstart(rng, constraint){
- if (rng.compareBoundaryPoints (START_TO_START, constraint) <= 0) return 0; // at or before the beginning
- if (rng.compareBoundaryPoints (END_TO_START, constraint) >= 0) return constraint.toString().length;
- rng = rng.cloneRange(); // don't change the original
- rng.setEnd (constraint.endContainer, constraint.endOffset); // they now end at the same place
- return constraint.toString().replace(/\r/g, '').length - rng.toString().replace(/\r/g, '').length;
- }
- function w3cend (rng, constraint){
- if (rng.compareBoundaryPoints (END_TO_END, constraint) >= 0) return constraint.toString().length; // at or after the end
- if (rng.compareBoundaryPoints (START_TO_END, constraint) <= 0) return 0;
- rng = rng.cloneRange(); // don't change the original
- rng.setStart (constraint.startContainer, constraint.startOffset); // they now start at the same place
- return rng.toString().replace(/\r/g, '').length;
- }
- function NothingRange(){}
- NothingRange.prototype = new Range();
- NothingRange.prototype._nativeRange = function(bounds) {
- return bounds || [0,this.length()];
- };
- NothingRange.prototype._nativeSelect = function (rng){ // do nothing
- };
- NothingRange.prototype._nativeSelection = function(){
- return [0,0];
- };
- NothingRange.prototype._nativeGetText = function (rng){
- return this._el[this._textProp].substring(rng[0], rng[1]);
- };
- NothingRange.prototype._nativeSetText = function (text, rng){
- var val = this._el[this._textProp];
- this._el[this._textProp] = val.substring(0, rng[0]) + text + val.substring(rng[1]);
- };
- NothingRange.prototype._nativeEOL = function(){
- this.text('\n');
- };
- NothingRange.prototype._nativeTop = function(){
- return 0;
- };
- NothingRange.prototype._nativeWrap = function() {throw new Error("Wrapping not implemented")};
- // data for elements, similar to jQuery data, but allows for monitoring with custom events
- var data = []; // to avoid attaching javascript objects to DOM elements, to avoid memory leaks
- bililiteRange.fn.data = function(){
- var index = this.element().bililiteRangeData;
- if (index == undefined){
- index = this.element().bililiteRangeData = data.length;
- data[index] = new Data(this);
- }
- return data[index];
- }
- try {
- Object.defineProperty({},'foo',{}); // IE8 will throw an error
- var Data = function(rng) {
- // we use JSON.stringify to display the data values. To make some of those non-enumerable, we have to use properties
- Object.defineProperty(this, 'values', {
- value: {}
- });
- Object.defineProperty(this, 'sourceRange', {
- value: rng
- });
- Object.defineProperty(this, 'toJSON', {
- value: function(){
- var ret = {};
- for (var i in Data.prototype) if (i in this.values) ret[i] = this.values[i];
- return ret;
- }
- });
- // to display all the properties (not just those changed), use JSON.stringify(state.all)
- Object.defineProperty(this, 'all', {
- get: function(){
- var ret = {};
- for (var i in Data.prototype) ret[i] = this[i];
- return ret;
- }
- });
- }
- Data.prototype = {};
- Object.defineProperty(Data.prototype, 'values', {
- value: {}
- });
- Object.defineProperty(Data.prototype, 'monitored', {
- value: {}
- });
- bililiteRange.data = function (name, newdesc){
- newdesc = newdesc || {};
- var desc = Object.getOwnPropertyDescriptor(Data.prototype, name) || {};
- if ('enumerable' in newdesc) desc.enumerable = !!newdesc.enumerable;
- if (!('enumerable' in desc)) desc.enumerable = true; // default
- if ('value' in newdesc) Data.prototype.values[name] = newdesc.value;
- if ('monitored' in newdesc) Data.prototype.monitored[name] = newdesc.monitored;
- desc.configurable = true;
- desc.get = function (){
- if (name in this.values) return this.values[name];
- return Data.prototype.values[name];
- };
- desc.set = function (value){
- this.values[name] = value;
- if (Data.prototype.monitored[name]) this.sourceRange.dispatch({
- type: 'bililiteRangeData',
- bubbles: true,
- detail: {name: name, value: value}
- });
- }
- Object.defineProperty(Data.prototype, name, desc);
- }
- }catch(err){
- // if we can't set object property properties, just use old-fashioned properties
- Data = function(rng){ this.sourceRange = rng };
- Data.prototype = {};
- bililiteRange.data = function(name, newdesc){
- if ('value' in newdesc) Data.prototype[name] = newdesc.value;
- }
- }
- })();
- // Polyfill for forEach, per Mozilla documentation. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach#Polyfill
- if (!Array.prototype.forEach)
- {
- Array.prototype.forEach = function(fun /*, thisArg */)
- {
- "use strict";
- if (this === void 0 || this === null)
- throw new TypeError();
- var t = Object(this);
- var len = t.length >>> 0;
- if (typeof fun !== "function")
- throw new TypeError();
- var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
- for (var i = 0; i < len; i++)
- {
- if (i in t)
- fun.call(thisArg, t[i], i, t);
- }
- };
- }