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b69a1635de
We need to know when the document is modified in order to fire an "input" event and set the undo/redo state correctly. Observing keyup is imprecise, as it's hard to tell whether the key press actually modified anything. Newer browsers support mutation observers, which tell you precisely when something has changed. For IE9/10, Opera 12 and other older browsers, we fall back to observing keyup again. Fixes #26.
39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
/*jshint strict:false, undef:false, unused:false */
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var DOCUMENT_POSITION_PRECEDING = 2; // Node.DOCUMENT_POSITION_PRECEDING
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var ELEMENT_NODE = 1; // Node.ELEMENT_NODE;
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var TEXT_NODE = 3; // Node.TEXT_NODE;
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var SHOW_ELEMENT = 1; // NodeFilter.SHOW_ELEMENT;
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var SHOW_TEXT = 4; // NodeFilter.SHOW_TEXT;
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var START_TO_START = 0; // Range.START_TO_START
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var START_TO_END = 1; // Range.START_TO_END
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var END_TO_END = 2; // Range.END_TO_END
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var END_TO_START = 3; // Range.END_TO_START
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var ZWS = '\u200B';
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var win = doc.defaultView;
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var ua = navigator.userAgent;
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var isIOS = /iP(?:ad|hone|od)/.test( ua );
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var isMac = /Mac OS X/.test( ua );
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var isGecko = /Gecko\//.test( ua );
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var isIElt11 = /Trident\/[456]\./.test( ua );
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var isPresto = !!win.opera;
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var isWebKit = /WebKit\//.test( ua );
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var ctrlKey = isMac ? 'meta-' : 'ctrl-';
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var useTextFixer = isIElt11 || isPresto;
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var cantFocusEmptyTextNodes = isIElt11 || isWebKit;
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var losesSelectionOnBlur = isIElt11;
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var canObserveMutations = typeof MutationObserver !== 'undefined';
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// Use [^ \t\r\n] instead of \S so that nbsp does not count as white-space
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var notWS = /[^ \t\r\n]/;
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var indexOf = Array.prototype.indexOf;
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