468 lines
18 KiB
JavaScript
468 lines
18 KiB
JavaScript
// Cross-broswer implementation of text ranges and selections
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// documentation: http://bililite.com/blog/2011/01/11/cross-browser-.and-selections/
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// Version: 1.1
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// Copyright (c) 2010 Daniel Wachsstock
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// MIT license:
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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(function($){
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bililiteRange = function(el, debug){
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var ret;
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if (debug){
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ret = new NothingRange(); // Easier to force it to use the no-selection type than to try to find an old browser
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}else if (document.selection){
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// Internet Explorer
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ret = new IERange();
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}else if (window.getSelection && el.setSelectionRange){
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// Standards. Element is an input or textarea
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ret = new InputRange();
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}else if (window.getSelection){
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// Standards, with any other kind of element
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ret = new W3CRange()
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}else{
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// doesn't support selection
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ret = new NothingRange();
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}
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ret._el = el;
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ret._doc = el.ownerDocument;
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ret._win = 'defaultView' in ret._doc ? ret._doc.defaultView : ret._doc.parentWindow;
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ret._textProp = textProp(el);
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ret._bounds = [0, ret.length()];
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return ret;
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}
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function textProp(el){
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// returns the property that contains the text of the element
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if (typeof el.value != 'undefined') return 'value';
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if (typeof el.text != 'undefined') return 'text';
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if (typeof el.textContent != 'undefined') return 'textContent';
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return 'innerText';
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}
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// base class
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function Range(){}
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Range.prototype = {
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length: function() {
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return this._el[this._textProp].replace(/\r/g, '').length; // need to correct for IE's CrLf weirdness
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},
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bounds: function(s){
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if (s === 'all'){
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this._bounds = [0, this.length()];
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}else if (s === 'start'){
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this._bounds = [0, 0];
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}else if (s === 'end'){
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this._bounds = [this.length(), this.length()];
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}else if (s === 'selection'){
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this.bounds ('all'); // first select the whole thing for constraining
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this._bounds = this._nativeSelection();
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}else if (s){
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this._bounds = s; // don't error check now; the element may change at any moment, so constrain it when we need it.
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}else{
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var b = [
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Math.max(0, Math.min (this.length(), this._bounds[0])),
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Math.max(0, Math.min (this.length(), this._bounds[1]))
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];
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return b; // need to constrain it to fit
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}
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return this; // allow for chaining
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},
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select: function(){
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this._nativeSelect(this._nativeRange(this.bounds()));
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return this; // allow for chaining
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},
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text: function(text, select){
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if (arguments.length){
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this._nativeSetText(text, this._nativeRange(this.bounds()));
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if (select == 'start'){
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this.bounds ([this._bounds[0], this._bounds[0]]);
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this.select();
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}else if (select == 'end'){
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this.bounds ([this._bounds[0]+text.length, this._bounds[0]+text.length]);
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this.select();
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}else if (select == 'all'){
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this.bounds ([this._bounds[0], this._bounds[0]+text.length]);
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this.select();
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}
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return this; // allow for chaining
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}else{
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return this._nativeGetText(this._nativeRange(this.bounds()));
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}
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},
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insertEOL: function (){
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this._nativeEOL();
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this._bounds = [this._bounds[0]+1, this._bounds[0]+1]; // move past the EOL marker
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return this;
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}
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};
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function IERange(){}
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IERange.prototype = new Range();
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IERange.prototype._nativeRange = function (bounds){
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var rng;
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if (this._el.tagName == 'INPUT'){
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// IE 8 is very inconsistent; textareas have createTextRange but it doesn't work
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rng = this._el.createTextRange();
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}else{
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rng = this._doc.body.createTextRange ();
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rng.moveToElementText(this._el);
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}
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if (bounds){
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if (bounds[1] < 0) bounds[1] = 0; // IE tends to run elements out of bounds
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if (bounds[0] > this.length()) bounds[0] = this.length();
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if (bounds[1] < rng.text.replace(/\r/g, '').length){ // correct for IE's CrLf wierdness
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// 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
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rng.moveEnd ('character', -1);
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rng.moveEnd ('character', bounds[1]-rng.text.replace(/\r/g, '').length);
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}
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if (bounds[0] > 0) rng.moveStart('character', bounds[0]);
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}
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return rng;
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};
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IERange.prototype._nativeSelect = function (rng){
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rng.select();
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};
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IERange.prototype._nativeSelection = function (){
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// returns [start, end] for the selection constrained to be in element
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var rng = this._nativeRange(); // range of the element to constrain to
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var len = this.length();
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if (this._doc.selection.type != 'Text') return [len, len]; // append to the end
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var sel = this._doc.selection.createRange();
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try{
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return [
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iestart(sel, rng),
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ieend (sel, rng)
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];
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}catch (e){
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// IE gets upset sometimes about comparing text to input elements, but the selections cannot overlap, so make a best guess
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return (sel.parentElement().sourceIndex < this._el.sourceIndex) ? [0,0] : [len, len];
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}
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};
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IERange.prototype._nativeGetText = function (rng){
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return rng.text.replace(/\r/g, ''); // correct for IE's CrLf weirdness
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};
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IERange.prototype._nativeSetText = function (text, rng){
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rng.text = text;
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};
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IERange.prototype._nativeEOL = function(){
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if (typeof this._el.value != 'undefined'){
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this.text('\n'); // for input and textarea, insert it straight
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}else{
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this._nativeRange(this.bounds()).pasteHTML('<br/>');
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}
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};
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// IE internals
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function iestart(rng, constraint){
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// 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
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var len = constraint.text.replace(/\r/g, '').length; // correct for IE's CrLf wierdness
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if (rng.compareEndPoints ('StartToStart', constraint) <= 0) return 0; // at or before the beginning
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if (rng.compareEndPoints ('StartToEnd', constraint) >= 0) return len;
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for (var i = 0; rng.compareEndPoints ('StartToStart', constraint) > 0; ++i, rng.moveStart('character', -1));
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return i;
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}
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function ieend (rng, constraint){
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// 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
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var len = constraint.text.replace(/\r/g, '').length; // correct for IE's CrLf wierdness
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if (rng.compareEndPoints ('EndToEnd', constraint) >= 0) return len; // at or after the end
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if (rng.compareEndPoints ('EndToStart', constraint) <= 0) return 0;
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for (var i = 0; rng.compareEndPoints ('EndToStart', constraint) > 0; ++i, rng.moveEnd('character', -1));
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return i;
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}
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// an input element in a standards document. "Native Range" is just the bounds array
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function InputRange(){}
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InputRange.prototype = new Range();
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InputRange.prototype._nativeRange = function(bounds) {
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return bounds || [0, this.length()];
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};
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InputRange.prototype._nativeSelect = function (rng){
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this._el.setSelectionRange(rng[0], rng[1]);
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};
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InputRange.prototype._nativeSelection = function(){
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return [this._el.selectionStart, this._el.selectionEnd];
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};
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InputRange.prototype._nativeGetText = function(rng){
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return this._el.value.substring(rng[0], rng[1]);
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};
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InputRange.prototype._nativeSetText = function(text, rng){
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var val = this._el.value;
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this._el.value = val.substring(0, rng[0]) + text + val.substring(rng[1]);
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};
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InputRange.prototype._nativeEOL = function(){
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this.text('\n');
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};
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function W3CRange(){}
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W3CRange.prototype = new Range();
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W3CRange.prototype._nativeRange = function (bounds){
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var rng = this._doc.createRange();
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rng.selectNodeContents(this._el);
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if (bounds){
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w3cmoveBoundary (rng, bounds[0], true, this._el);
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rng.collapse (true);
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w3cmoveBoundary (rng, bounds[1]-bounds[0], false, this._el);
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}
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return rng;
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};
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W3CRange.prototype._nativeSelect = function (rng){
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this._win.getSelection().removeAllRanges();
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this._win.getSelection().addRange (rng);
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};
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W3CRange.prototype._nativeSelection = function (){
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// returns [start, end] for the selection constrained to be in element
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var rng = this._nativeRange(); // range of the element to constrain to
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if (this._win.getSelection().rangeCount == 0) return [this.length(), this.length()]; // append to the end
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var sel = this._win.getSelection().getRangeAt(0);
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return [
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w3cstart(sel, rng),
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w3cend (sel, rng)
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];
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}
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W3CRange.prototype._nativeGetText = function (rng){
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return rng.toString();
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};
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W3CRange.prototype._nativeSetText = function (text, rng){
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rng.deleteContents();
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rng.insertNode (this._doc.createTextNode(text));
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this._el.normalize(); // merge the text with the surrounding text
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};
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W3CRange.prototype._nativeEOL = function(){
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var rng = this._nativeRange(this.bounds());
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rng.deleteContents();
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var br = this._doc.createElement('br');
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br.setAttribute ('_moz_dirty', ''); // for Firefox
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rng.insertNode (br);
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rng.insertNode (this._doc.createTextNode('\n'));
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rng.collapse (false);
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};
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// W3C internals
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function nextnode (node, root){
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// in-order traversal
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// we've already visited node, so get kids then siblings
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if (node.firstChild) return node.firstChild;
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if (node.nextSibling) return node.nextSibling;
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if (node===root) return null;
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while (node.parentNode){
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// get uncles
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node = node.parentNode;
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if (node == root) return null;
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if (node.nextSibling) return node.nextSibling;
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}
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return null;
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}
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function w3cmoveBoundary (rng, n, bStart, el){
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// move the boundary (bStart == true ? start : end) n characters forward, up to the end of element el. Forward only!
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// if the start is moved after the end, then an exception is raised
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if (n <= 0) return;
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var node = rng[bStart ? 'startContainer' : 'endContainer'];
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if (node.nodeType == 3){
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// we may be starting somewhere into the text
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n += rng[bStart ? 'startOffset' : 'endOffset'];
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}
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while (node){
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if (node.nodeType == 3){
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if (n <= node.nodeValue.length){
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rng[bStart ? 'setStart' : 'setEnd'](node, n);
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// special case: if we end next to a <br>, include that node.
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if (n == node.nodeValue.length){
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// skip past zero-length text nodes
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for (var next = nextnode (node, el); next && next.nodeType==3 && next.nodeValue.length == 0; next = nextnode(next, el)){
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rng[bStart ? 'setStartAfter' : 'setEndAfter'](next);
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}
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if (next && next.nodeType == 1 && next.nodeName == "BR") rng[bStart ? 'setStartAfter' : 'setEndAfter'](next);
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}
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return;
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}else{
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rng[bStart ? 'setStartAfter' : 'setEndAfter'](node); // skip past this one
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n -= node.nodeValue.length; // and eat these characters
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}
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}
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node = nextnode (node, el);
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}
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}
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var START_TO_START = 0; // from the w3c definitions
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var START_TO_END = 1;
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var END_TO_END = 2;
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var END_TO_START = 3;
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// from the Mozilla documentation, for range.compareBoundaryPoints(how, sourceRange)
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// -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.
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// * Range.END_TO_END compares the end boundary-point of sourceRange to the end boundary-point of range.
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// * Range.END_TO_START compares the end boundary-point of sourceRange to the start boundary-point of range.
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// * Range.START_TO_END compares the start boundary-point of sourceRange to the end boundary-point of range.
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// * Range.START_TO_START compares the start boundary-point of sourceRange to the start boundary-point of range.
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function w3cstart(rng, constraint){
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if (rng.compareBoundaryPoints (START_TO_START, constraint) <= 0) return 0; // at or before the beginning
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if (rng.compareBoundaryPoints (END_TO_START, constraint) >= 0) return constraint.toString().length;
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rng = rng.cloneRange(); // don't change the original
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rng.setEnd (constraint.endContainer, constraint.endOffset); // they now end at the same place
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return constraint.toString().length - rng.toString().length;
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}
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function w3cend (rng, constraint){
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if (rng.compareBoundaryPoints (END_TO_END, constraint) >= 0) return constraint.toString().length; // at or after the end
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if (rng.compareBoundaryPoints (START_TO_END, constraint) <= 0) return 0;
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rng = rng.cloneRange(); // don't change the original
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rng.setStart (constraint.startContainer, constraint.startOffset); // they now start at the same place
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return rng.toString().length;
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}
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function NothingRange(){}
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NothingRange.prototype = new Range();
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NothingRange.prototype._nativeRange = function(bounds) {
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return bounds || [0,this.length()];
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};
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NothingRange.prototype._nativeSelect = function (rng){ // do nothing
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};
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NothingRange.prototype._nativeSelection = function(){
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return [0,0];
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};
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NothingRange.prototype._nativeGetText = function (rng){
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return this._el[this._textProp].substring(rng[0], rng[1]);
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};
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NothingRange.prototype._nativeSetText = function (text, rng){
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var val = this._el[this._textProp];
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this._el[this._textProp] = val.substring(0, rng[0]) + text + val.substring(rng[1]);
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};
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NothingRange.prototype._nativeEOL = function(){
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this.text('\n');
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};
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})(jQuery);
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// insert characters in a textarea or text input field
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// special characters are enclosed in {}; use {{} for the { character itself
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// documentation: http://bililite.com/blog/2008/08/20/the-fnsendkeys-plugin/
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// Version: 2.0
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// Copyright (c) 2010 Daniel Wachsstock
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// MIT license:
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
|
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the
|
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// Software is furnished to do so, subject to the following
|
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// conditions:
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|
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// The above copyright notice and this permission notice shall be
|
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// included in all copies or substantial portions of the Software.
|
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|
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// 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
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// 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
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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(function($){
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$.fn.sendkeys = function (x, opts){
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return this.each( function(){
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var localkeys = $.extend({}, opts, $(this).data('sendkeys')); // allow for element-specific key functions
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// most elements to not keep track of their selection when they lose focus, so we have to do it for them
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var rng = $.data (this, 'sendkeys.selection');
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if (!rng){
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rng = bililiteRange(this).bounds('selection');
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$.data(this, 'sendkeys.selection', rng);
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$(this).bind('mouseup.sendkeys', function(){
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// we have to update the saved range. The routines here update the bounds with each press, but actual keypresses and mouseclicks do not
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$.data(this, 'sendkeys.selection').bounds('selection');
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}).bind('keyup.sendkeys', function(evt){
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// restore the selection if we got here with a tab (a click should select what was clicked on)
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if (evt.which == 9){
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// there's a flash of selection when we restore the focus, but I don't know how to avoid that.
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$.data(this, 'sendkeys.selection').select();
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}else{
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$.data(this, 'sendkeys.selection').bounds('selection');
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}
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});
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}
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this.focus();
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if (typeof x === 'undefined') return; // no string, so we just set up the event handlers
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$.data(this, 'sendkeys.originalText', rng.text());
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x.replace(/\n/g, '{enter}'). // turn line feeds into explicit break insertions
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replace(/{[^}]*}|[^{]+/g, function(s){
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(localkeys[s] || $.fn.sendkeys.defaults[s] || $.fn.sendkeys.defaults.simplechar)(rng, s);
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});
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$(this).trigger({type: 'sendkeys', which: x});
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});
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}; // sendkeys
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// add the functions publicly so they can be overridden
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$.fn.sendkeys.defaults = {
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simplechar: function (rng, s){
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rng.text(s, 'end');
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for (var i =0; i < s.length; ++i){
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var x = s.charCodeAt(i);
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// a bit of cheating: rng._el is the element associated with rng.
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$(rng._el).trigger({type: 'keypress', keyCode: x, which: x, charCode: x});
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}
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},
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'{{}': function (rng){
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$.fn.sendkeys.defaults.simplechar (rng, '{')
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},
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'{enter}': function (rng){
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rng.insertEOL();
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rng.select();
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var x = '\n'.charCodeAt(0);
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$(rng._el).trigger({type: 'keypress', keyCode: x, which: x, charCode: x});
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},
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'{backspace}': function (rng){
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var b = rng.bounds();
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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
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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]]).select();
|
|
},
|
|
'{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]]).select();
|
|
},
|
|
'{selectall}' : function (rng){
|
|
rng.bounds('all').select();
|
|
},
|
|
'{selection}': function (rng){
|
|
$.fn.sendkeys.defaults.simplechar(rng, $.data(rng._el, 'sendkeys.originalText'));
|
|
},
|
|
'{mark}' : function (rng){
|
|
var bounds = rng.bounds();
|
|
$(rng._el).one('sendkeys', function(){
|
|
// set up the event listener to change the selection after the sendkeys is done
|
|
rng.bounds(bounds).select();
|
|
});
|
|
}
|
|
};
|
|
|
|
})(jQuery)
|