cufon-yui.js

/*!
 * Copyright (c) 2011 Simo Kinnunen.
 * Licensed under the MIT license.
 *
 * @version ${Version}
 */

var Cufon = (function() {

    var api = function() {
        return api.replace.apply(null, arguments);
    };

    var DOM = api.DOM = {

        ready: (function() {

            var complete = false, readyStatus = { loaded: 1, complete: 1 };

            var queue = [], perform = function() {
                if (complete) return;
                complete = true;
                for (var fn; fn = queue.shift(); fn());
            };

            // Gecko, Opera, WebKit r26101+

            if (document.addEventListener) {
                document.addEventListener('DOMContentLoaded', perform, false);
                window.addEventListener('pageshow', perform, false); // For cached Gecko pages
            }

            // Old WebKit, Internet Explorer

            if (!window.opera && document.readyState) (function() {
                readyStatus[document.readyState] ? perform() : setTimeout(arguments.callee, 10);
            })();

            // Internet Explorer

            if (document.readyState && document.createStyleSheet) (function() {
                try {
                    document.body.doScroll('left');
                    perform();
                }
                catch (e) {
                    setTimeout(arguments.callee, 1);
                }
            })();

            addEvent(window, 'load', perform); // Fallback

            return function(listener) {
                if (!arguments.length) perform();
                else complete ? listener() : queue.push(listener);
            };

        })(),

        root: function() {
            return document.documentElement || document.body;
        },

        strict: (function() {
            var doctype;
            // no doctype (doesn't always catch it though.. IE I'm looking at you)
            if (document.compatMode == 'BackCompat') return false;
            // WebKit, Gecko, Opera, IE9+
            doctype = document.doctype;
            if (doctype) {
                return !/frameset|transitional/i.test(doctype.publicId);
            }
            // IE<9, firstChild is the doctype even if there's an XML declaration
            doctype = document.firstChild;
            if (doctype.nodeType != 8 || /^DOCTYPE.+(transitional|frameset)/i.test(doctype.data)) {
                return false;
            }
            return true;
        })()

    };

    var CSS = api.CSS = {

        Size: function(value, base) {

            this.value = parseFloat(value);
            this.unit = String(value).match(/[a-z%]*$/)[0] || 'px';

            this.convert = function(value) {
                return value / base * this.value;
            };

            this.convertFrom = function(value) {
                return value / this.value * base;
            };

            this.toString = function() {
                return this.value + this.unit;
            };

        },

        addClass: function(el, className) {
            var current = el.className;
            el.className = current + (current && ' ') + className;
            return el;
        },

        color: cached(function(value) {
            var parsed = {};
            parsed.color = value.replace(/^rgba\((.*?),\s*([\d.]+)\)/, function($0, $1, $2) {
                parsed.opacity = parseFloat($2);
                return 'rgb(' + $1 + ')';
            });
            return parsed;
        }),

        // has no direct CSS equivalent.
        // @see http://msdn.microsoft.com/en-us/library/system.windows.fontstretches.aspx
        fontStretch: cached(function(value) {
            if (typeof value == 'number') return value;
            if (/%$/.test(value)) return parseFloat(value) / 100;
            return {
                'ultra-condensed': 0.5,
                'extra-condensed': 0.625,
                condensed: 0.75,
                'semi-condensed': 0.875,
                'semi-expanded': 1.125,
                expanded: 1.25,
                'extra-expanded': 1.5,
                'ultra-expanded': 2
            }[value] || 1;
        }),

        getStyle: function(el) {
            var view = document.defaultView;
            if (view && view.getComputedStyle) return new Style(view.getComputedStyle(el, null));
            if (el.currentStyle) return new Style(el.currentStyle);
            return new Style(el.style);
        },

        gradient: cached(function(value) {
            var gradient = {
                id: value,
                type: value.match(/^-([a-z]+)-gradient\(/)[1],
                stops: []
            }, colors = value.substr(value.indexOf('(')).match(/([\d.]+=)?(#[a-f0-9]+|[a-z]+\(.*?\)|[a-z]+)/ig);
            for (var i = 0, l = colors.length, stop; i < l; ++i) {
                stop = colors[i].split('=', 2).reverse();
                gradient.stops.push([ stop[1] || i / (l - 1), stop[0] ]);
            }
            return gradient;
        }),

        quotedList: cached(function(value) {
            // doesn't work properly with empty quoted strings (""), but
            // it's not worth the extra code.
            var list = [], re = /\s*((["'])([\s\S]*?[^\\])\2|[^,]+)\s*/g, match;
            while (match = re.exec(value)) list.push(match[3] || match[1]);
            return list;
        }),

        recognizesMedia: cached(function(media) {
            var el = document.createElement('style'), sheet, container, supported;
            el.type = 'text/css';
            el.media = media;
            try { // this is cached anyway
                el.appendChild(document.createTextNode('/**/'));
            } catch (e) {}
            container = elementsByTagName('head')[0];
            container.insertBefore(el, container.firstChild);
            sheet = (el.sheet || el.styleSheet);
            supported = sheet && !sheet.disabled;
            container.removeChild(el);
            return supported;
        }),

        removeClass: function(el, className) {
            var re = RegExp('(?:^|\\s+)' + className +  '(?=\\s|$)', 'g');
            el.className = el.className.replace(re, '');
            return el;
        },

        supports: function(property, value) {
            var checker = document.createElement('span').style;
            if (checker[property] === undefined) return false;
            checker[property] = value;
            return checker[property] === value;
        },

        textAlign: function(word, style, position, wordCount) {
            if (style.get('textAlign') == 'right') {
                if (position > 0) word = ' ' + word;
            }
            else if (position < wordCount - 1) word += ' ';
            return word;
        },

        textShadow: cached(function(value) {
            if (value == 'none') return null;
            var shadows = [], currentShadow = {}, result, offCount = 0;
            var re = /(#[a-f0-9]+|[a-z]+\(.*?\)|[a-z]+)|(-?[\d.]+[a-z%]*)|,/ig;
            while (result = re.exec(value)) {
                if (result[0] == ',') {
                    shadows.push(currentShadow);
                    currentShadow = {};
                    offCount = 0;
                }
                else if (result[1]) {
                    currentShadow.color = result[1];
                }
                else {
                    currentShadow[[ 'offX', 'offY', 'blur' ][offCount++]] = result[2];
                }
            }
            shadows.push(currentShadow);
            return shadows;
        }),

        textTransform: (function() {
            var map = {
                uppercase: function(s) {
                    return s.toUpperCase();
                },
                lowercase: function(s) {
                    return s.toLowerCase();
                },
                capitalize: function(s) {
                    return s.replace(/(?:^|\s)./g, function($0) {
                        return $0.toUpperCase();
                    });
                }
            };
            return function(text, style) {
                var transform = map[style.get('textTransform')];
                return transform ? transform(text) : text;
            };
        })(),

        whiteSpace: (function() {
            var ignore = {
                inline: 1,
                'inline-block': 1,
                'run-in': 1
            };
            var wsStart = /^\s+/, wsEnd = /\s+$/;
            return function(text, style, node, previousElement, simple) {
                if (simple) return text.replace(wsStart, '').replace(wsEnd, ''); // @fixme too simple
                if (previousElement) {
                    if (previousElement.nodeName.toLowerCase() == 'br') {
                        text = text.replace(wsStart, '');
                    }
                }
                if (ignore[style.get('display')]) return text;
                if (!node.previousSibling) text = text.replace(wsStart, '');
                if (!node.nextSibling) text = text.replace(wsEnd, '');
                return text;
            };
        })()

    };

    CSS.ready = (function() {

        // don't do anything in Safari 2 (it doesn't recognize any media type)
        var complete = !CSS.recognizesMedia('all'), hasLayout = false;

        var queue = [], perform = function() {
            complete = true;
            for (var fn; fn = queue.shift(); fn());
        };

        var links = elementsByTagName('link'), styles = elementsByTagName('style');

        var checkTypes = {
            '': 1,
            'text/css': 1
        };

        function isContainerReady(el) {
            if (!checkTypes[el.type.toLowerCase()]) return true;
            return el.disabled || isSheetReady(el.sheet, el.media || 'screen');
        }

        function isSheetReady(sheet, media) {
            // in Opera sheet.disabled is true when it's still loading,
            // even though link.disabled is false. they stay in sync if
            // set manually.
            if (!CSS.recognizesMedia(media || 'all')) return true;
            if (!sheet || sheet.disabled) return false;
            try {
                var rules = sheet.cssRules, rule;
                if (rules) {
                    // needed for Safari 3 and Chrome 1.0.
                    // in standards-conforming browsers cssRules contains @-rules.
                    // Chrome 1.0 weirdness: rules[<number larger than .length - 1>]
                    // returns the last rule, so a for loop is the only option.
                    search: for (var i = 0, l = rules.length; rule = rules[i], i < l; ++i) {
                        switch (rule.type) {
                            case 2: // @charset
                                break;
                            case 3: // @import
                                if (!isSheetReady(rule.styleSheet, rule.media.mediaText)) return false;
                                break;
                            default:
                                // only @charset can precede @import
                                break search;
                        }
                    }
                }
            }
            catch (e) {} // probably a style sheet from another domain
            return true;
        }

        function allStylesLoaded() {
            // Internet Explorer's style sheet model, there's no need to do anything
            if (document.createStyleSheet) return true;
            // standards-compliant browsers
            var el, i;
            for (i = 0; el = links[i]; ++i) {
                if (el.rel.toLowerCase() == 'stylesheet' && !isContainerReady(el)) return false;
            }
            for (i = 0; el = styles[i]; ++i) {
                if (!isContainerReady(el)) return false;
            }
            return true;
        }

        DOM.ready(function() {
            // getComputedStyle returns null in Gecko if used in an iframe with display: none
            if (!hasLayout) hasLayout = CSS.getStyle(document.body).isUsable();
            if (complete || (hasLayout && allStylesLoaded())) perform();
            else setTimeout(arguments.callee, 10);
        });

        return function(listener) {
            if (complete) listener();
            else queue.push(listener);
        };

    })();

    function Font(data) {

        var face = this.face = data.face, wordSeparators = {
            '\u0020': 1,
            '\u00a0': 1,
            '\u3000': 1
        };

        this.glyphs = (function(glyphs) {
            var key, fallbacks = {
                '\u2011': '\u002d',
                '\u00ad': '\u2011'
            };
            for (key in fallbacks) {
                if (!hasOwnProperty(fallbacks, key)) continue;
                if (!glyphs[key]) glyphs[key] = glyphs[fallbacks[key]];
            }
            return glyphs;
        })(data.glyphs);

        this.w = data.w;
        this.baseSize = parseInt(face['units-per-em'], 10);

        this.family = face['font-family'].toLowerCase();
        this.weight = face['font-weight'];
        this.style = face['font-style'] || 'normal';

        this.viewBox = (function () {
            var parts = face.bbox.split(/\s+/);
            var box = {
                minX: parseInt(parts[0], 10),
                minY: parseInt(parts[1], 10),
                maxX: parseInt(parts[2], 10),
                maxY: parseInt(parts[3], 10)
            };
            box.width = box.maxX - box.minX;
            box.height = box.maxY - box.minY;
            box.toString = function() {
                return [ this.minX, this.minY, this.width, this.height ].join(' ');
            };
            return box;
        })();

        this.ascent = -parseInt(face.ascent, 10);
        this.descent = -parseInt(face.descent, 10);

        this.height = -this.ascent + this.descent;

        this.spacing = function(chars, letterSpacing, wordSpacing) {
            var glyphs = this.glyphs, glyph,
                kerning, k,
                jumps = [],
                width = 0, w,
                i = -1, j = -1, chr;
            while (chr = chars[++i]) {
                glyph = glyphs[chr] || this.missingGlyph;
                if (!glyph) continue;
                if (kerning) {
                    width -= k = kerning[chr] || 0;
                    jumps[j] -= k;
                }
                w = glyph.w;
                if (isNaN(w)) w = +this.w; // may have been a String in old fonts
                if (w > 0) {
                    w += letterSpacing;
                    if (wordSeparators[chr]) w += wordSpacing;
                }
                width += jumps[++j] = ~~w; // get rid of decimals
                kerning = glyph.k;
            }
            jumps.total = width;
            return jumps;
        };

    }

    function FontFamily() {

        var styles = {}, mapping = {
            oblique: 'italic',
            italic: 'oblique'
        };

        this.add = function(font) {
            (styles[font.style] || (styles[font.style] = {}))[font.weight] = font;
        };

        this.get = function(style, weight) {
            var weights = styles[style] || styles[mapping[style]]
                || styles.normal || styles.italic || styles.oblique;
            if (!weights) return null;
            // we don't have to worry about "bolder" and "lighter"
            // because IE's currentStyle returns a numeric value for it,
            // and other browsers use the computed value anyway
            weight = {
                normal: 400,
                bold: 700
            }[weight] || parseInt(weight, 10);
            if (weights[weight]) return weights[weight];
            // http://www.w3.org/TR/CSS21/fonts.html#propdef-font-weight
            // Gecko uses x99/x01 for lighter/bolder
            var up = {
                1: 1,
                99: 0
            }[weight % 100], alts = [], min, max;
            if (up === undefined) up = weight > 400;
            if (weight == 500) weight = 400;
            for (var alt in weights) {
                if (!hasOwnProperty(weights, alt)) continue;
                alt = parseInt(alt, 10);
                if (!min || alt < min) min = alt;
                if (!max || alt > max) max = alt;
                alts.push(alt);
            }
            if (weight < min) weight = min;
            if (weight > max) weight = max;
            alts.sort(function(a, b) {
                return (up
                    ? (a >= weight && b >= weight) ? a < b : a > b
                    : (a <= weight && b <= weight) ? a > b : a < b) ? -1 : 1;
            });
            return weights[alts[0]];
        };

    }

    function HoverHandler() {

        function contains(node, anotherNode) {
            try {
                if (node.contains) return node.contains(anotherNode);
                return node.compareDocumentPosition(anotherNode) & 16;
            }
            catch(e) {} // probably a XUL element such as a scrollbar
            return false;
        }

        // mouseover/mouseout (standards) mode
        function onOverOut(e) {
            var related = e.relatedTarget;
            // there might be no relatedTarget if the element is right next
            // to the window frame
            if (related && contains(this, related)) return;
            trigger(this, e.type == 'mouseover');
        }

        // mouseenter/mouseleave (probably ie) mode
        function onEnterLeave(e) {
            if (!e) e = window.event;
            // ie model, we don't have access to "this", but
            // mouseenter/leave doesn't bubble so it's fine.
            trigger(e.target || e.srcElement, e.type == 'mouseenter');
        }

        function trigger(el, hoverState) {
            // A timeout is needed so that the event can actually "happen"
            // before replace is triggered. This ensures that styles are up
            // to date.
            setTimeout(function() {
                var options = sharedStorage.get(el).options;
                if (hoverState) {
                    options = merge(options, options.hover);
                    options._mediatorMode = 1;
                }
                api.replace(el, options, true);
            }, 10);
        }

        this.attach = function(el) {
            if (el.onmouseenter === undefined) {
                addEvent(el, 'mouseover', onOverOut);
                addEvent(el, 'mouseout', onOverOut);
            }
            else {
                addEvent(el, 'mouseenter', onEnterLeave);
                addEvent(el, 'mouseleave', onEnterLeave);
            }
        };

        this.detach = function(el) {
            if (el.onmouseenter === undefined) {
                removeEvent(el, 'mouseover', onOverOut);
                removeEvent(el, 'mouseout', onOverOut);
            }
            else {
                removeEvent(el, 'mouseenter', onEnterLeave);
                removeEvent(el, 'mouseleave', onEnterLeave);
            }
        };

    }

    function ReplaceHistory() {

        var list = [], map = {};

        function filter(keys) {
            var values = [], key;
            for (var i = 0; key = keys[i]; ++i) values[i] = list[map[key]];
            return values;
        }

        this.add = function(key, args) {
            map[key] = list.push(args) - 1;
        };

        this.repeat = function() {
            var snapshot = arguments.length ? filter(arguments) : list, args;
            for (var i = 0; args = snapshot[i++];) api.replace(args[0], args[1], true);
        };

    }

    function Storage() {

        var map = {}, at = 0;

        function identify(el) {
            return el.cufid || (el.cufid = ++at);
        }

        this.get = function(el) {
            var id = identify(el);
            return map[id] || (map[id] = {});
        };

    }

    function Style(style) {

        var custom = {}, sizes = {};

        this.extend = function(styles) {
            for (var property in styles) {
                if (hasOwnProperty(styles, property)) custom[property] = styles[property];
            }
            return this;
        };

        this.get = function(property) {
            return custom[property] != undefined ? custom[property] : style[property];
        };

        this.getSize = function(property, base) {
            return sizes[property] || (sizes[property] = new CSS.Size(this.get(property), base));
        };

        this.isUsable = function() {
            return !!style;
        };

    }

    function addEvent(el, type, listener) {
        if (el.addEventListener) {
            el.addEventListener(type, listener, false);
        }
        else if (el.attachEvent) {
            // we don't really need "this" right now, saves code
            el.attachEvent('on' + type, listener);
        }
    }

    function attach(el, options) {
        if (options._mediatorMode) return el;
        var storage = sharedStorage.get(el);
        var oldOptions = storage.options;
        if (oldOptions) {
            if (oldOptions === options) return el;
            if (oldOptions.hover) hoverHandler.detach(el);
        }
        if (options.hover && options.hoverables[el.nodeName.toLowerCase()]) {
            hoverHandler.attach(el);
        }
        storage.options = options;
        return el;
    }

    function cached(fun) {
        var cache = {};
        return function(key) {
            if (!hasOwnProperty(cache, key)) cache[key] = fun.apply(null, arguments);
            return cache[key];
        };
    }

    function getFont(el, style) {
        var families = CSS.quotedList(style.get('fontFamily').toLowerCase()), family;
        for (var i = 0; family = families[i]; ++i) {
            if (fonts[family]) return fonts[family].get(style.get('fontStyle'), style.get('fontWeight'));
        }
        return null;
    }

    function elementsByTagName(query) {
        return document.getElementsByTagName(query);
    }

    function hasOwnProperty(obj, property) {
        return obj.hasOwnProperty(property);
    }

    function merge() {
        var merged = {}, arg, key;
        for (var i = 0, l = arguments.length; arg = arguments[i], i < l; ++i) {
            for (key in arg) {
                if (hasOwnProperty(arg, key)) merged[key] = arg[key];
            }
        }
        return merged;
    }

    function process(font, text, style, options, node, el) {
        var fragment = document.createDocumentFragment(), processed;
        if (text === '') return fragment;
        var separate = options.separate;
        var parts = text.split(separators[separate]), needsAligning = (separate == 'words');
        if (needsAligning && HAS_BROKEN_REGEXP) {
            // @todo figure out a better way to do this
            if (/^\s/.test(text)) parts.unshift('');
            if (/\s$/.test(text)) parts.push('');
        }
        for (var i = 0, l = parts.length; i < l; ++i) {
            processed = engines[options.engine](font,
                needsAligning ? CSS.textAlign(parts[i], style, i, l) : parts[i],
                style, options, node, el, i < l - 1);
            if (processed) fragment.appendChild(processed);
        }
        return fragment;
    }

    function removeEvent(el, type, listener) {
        if (el.removeEventListener) {
            el.removeEventListener(type, listener, false);
        }
        else if (el.detachEvent) {
            el.detachEvent('on' + type, listener);
        }
    }

    function replaceElement(el, options) {
        var name = el.nodeName.toLowerCase();
        if (options.ignore[name]) return;
        if (options.ignoreClass && options.ignoreClass.test(el.className)) return;
        if (options.onBeforeReplace) options.onBeforeReplace(el, options);
        var replace = !options.textless[name], simple = (options.trim === 'simple');
        var style = CSS.getStyle(attach(el, options)).extend(options);
        // may cause issues if the element contains other elements
        // with larger fontSize, however such cases are rare and can
        // be fixed by using a more specific selector
        if (parseFloat(style.get('fontSize')) === 0) return;
        var font = getFont(el, style), node, type, next, anchor, text, lastElement;
        var isShy = options.softHyphens, anyShy = false, pos, shy, reShy = /\u00ad/g;
        var modifyText = options.modifyText;
        if (!font) return;
        for (node = el.firstChild; node; node = next) {
            type = node.nodeType;
            next = node.nextSibling;
            if (replace && type == 3) {
                if (isShy && el.nodeName.toLowerCase() != TAG_SHY) {
                    pos = node.data.indexOf('\u00ad');
                    if (pos >= 0) {
                        node.splitText(pos);
                        next = node.nextSibling;
                        next.deleteData(0, 1);
                        shy = document.createElement(TAG_SHY);
                        shy.appendChild(document.createTextNode('\u00ad'));
                        el.insertBefore(shy, next);
                        next = shy;
                        anyShy = true;
                    }
                }
                // Node.normalize() is broken in IE 6, 7, 8
                if (anchor) {
                    anchor.appendData(node.data);
                    el.removeChild(node);
                }
                else anchor = node;
                if (next) continue;
            }
            if (anchor) {
                text = anchor.data;
                if (!isShy) text = text.replace(reShy, '');
                text = CSS.whiteSpace(text, style, anchor, lastElement, simple);
                // modify text only on the first replace
                if (modifyText) text = modifyText(text, anchor, el, options);
                el.replaceChild(process(font, text, style, options, node, el), anchor);
                anchor = null;
            }
            if (type == 1) {
                if (node.firstChild) {
                    if (node.nodeName.toLowerCase() == 'cufon') {
                        engines[options.engine](font, null, style, options, node, el);
                    }
                    else arguments.callee(node, options);
                }
                lastElement = node;
            }
        }
        if (isShy && anyShy) {
            updateShy(el);
            if (!trackingShy) addEvent(window, 'resize', updateShyOnResize);
            trackingShy = true;
        }
        if (options.onAfterReplace) options.onAfterReplace(el, options);
    }

    function updateShy(context) {
        var shys, shy, parent, glue, newGlue, next, prev, i;
        shys = context.getElementsByTagName(TAG_SHY);
        // unfortunately there doesn't seem to be any easy
        // way to avoid having to loop through the shys twice.
        for (i = 0; shy = shys[i]; ++i) {
            shy.className = C_SHY_DISABLED;
            glue = parent = shy.parentNode;
            if (glue.nodeName.toLowerCase() != TAG_GLUE) {
                newGlue = document.createElement(TAG_GLUE);
                newGlue.appendChild(shy.previousSibling);
                parent.insertBefore(newGlue, shy);
                newGlue.appendChild(shy);
            }
            else {
                // get rid of double glue (edge case fix)
                glue = glue.parentNode;
                if (glue.nodeName.toLowerCase() == TAG_GLUE) {
                    parent = glue.parentNode;
                    while (glue.firstChild) {
                        parent.insertBefore(glue.firstChild, glue);
                    }
                    parent.removeChild(glue);
                }
            }
        }
        for (i = 0; shy = shys[i]; ++i) {
            shy.className = '';
            glue = shy.parentNode;
            parent = glue.parentNode;
            next = glue.nextSibling || parent.nextSibling;
            // make sure we're comparing same types
            prev = (next.nodeName.toLowerCase() == TAG_GLUE) ? glue : shy.previousSibling;
            if (prev.offsetTop >= next.offsetTop) {
                shy.className = C_SHY_DISABLED;
                if (prev.offsetTop < next.offsetTop) {
                    // we have an annoying edge case, double the glue
                    newGlue = document.createElement(TAG_GLUE);
                    parent.insertBefore(newGlue, glue);
                    newGlue.appendChild(glue);
                    newGlue.appendChild(next);
                }
            }
        }
    }

    function updateShyOnResize() {
        if (ignoreResize) return; // needed for IE
        CSS.addClass(DOM.root(), C_VIEWPORT_RESIZING);
        clearTimeout(shyTimer);
        shyTimer = setTimeout(function() {
            ignoreResize = true;
            CSS.removeClass(DOM.root(), C_VIEWPORT_RESIZING);
            updateShy(document);
            ignoreResize = false;
        }, 100);
    }

    var HAS_BROKEN_REGEXP = ' '.split(/\s+/).length == 0;
    var TAG_GLUE = 'cufonglue';
    var TAG_SHY = 'cufonshy';
    var C_SHY_DISABLED = 'cufon-shy-disabled';
    var C_VIEWPORT_RESIZING = 'cufon-viewport-resizing';

    var sharedStorage = new Storage();
    var hoverHandler = new HoverHandler();
    var replaceHistory = new ReplaceHistory();
    var initialized = false;
    var trackingShy = false;
    var shyTimer;
    var ignoreResize = false;

    var engines = {}, fonts = {}, defaultOptions = {
        autoDetect: false,
        engine: null,
        forceHitArea: false,
        hover: false,
        hoverables: {
            a: true
        },
        ignore: {
            applet: 1,
            canvas: 1,
            col: 1,
            colgroup: 1,
            head: 1,
            iframe: 1,
            map: 1,
            noscript: 1,
            optgroup: 1,
            option: 1,
            script: 1,
            select: 1,
            style: 1,
            textarea: 1,
            title: 1,
            pre: 1
        },
        ignoreClass: null,
        modifyText: null,
        onAfterReplace: null,
        onBeforeReplace: null,
        printable: true,
        selector: (
                window.Sizzle
            ||  (window.jQuery && function(query) { return jQuery(query); }) // avoid noConflict issues
            ||  (window.dojo && dojo.query)
            ||  (window.glow && glow.dom && glow.dom.get)
            ||  (window.Ext && Ext.query)
            ||  (window.YAHOO && YAHOO.util && YAHOO.util.Selector && YAHOO.util.Selector.query)
            ||  (window.$$ && function(query) { return $$(query); })
            ||  (window.$ && function(query) { return $(query); })
            ||  (document.querySelectorAll && function(query) { return document.querySelectorAll(query); })
            ||  elementsByTagName
        ),
        separate: 'words', // 'none' and 'characters' are also accepted
        softHyphens: true,
        textless: {
            dl: 1,
            html: 1,
            ol: 1,
            table: 1,
            tbody: 1,
            thead: 1,
            tfoot: 1,
            tr: 1,
            ul: 1
        },
        textShadow: 'none',
        trim: 'advanced'
    };

    var separators = {
        // The first pattern may cause unicode characters above
        // code point 255 to be removed in Safari 3.0. Luckily enough
        // Safari 3.0 does not include non-breaking spaces in \s, so
        // we can just use a simple alternative pattern.
        words: /\s/.test('\u00a0') ? /[^\S\u00a0]+/ : /\s+/,
        characters: '',
        none: /^/
    };

    api.now = function() {
        DOM.ready();
        return api;
    };

    api.refresh = function() {
        replaceHistory.repeat.apply(replaceHistory, arguments);
        return api;
    };

    api.registerEngine = function(id, engine) {
        if (!engine) return api;
        engines[id] = engine;
        return api.set('engine', id);
    };

    api.registerFont = function(data) {
        if (!data) return api;
        var font = new Font(data), family = font.family;
        if (!fonts[family]) fonts[family] = new FontFamily();
        fonts[family].add(font);
        return api.set('fontFamily', '"' + family + '"');
    };

    api.replace = function(elements, options, ignoreHistory) {
        options = merge(defaultOptions, options);
        if (!options.engine) return api; // there's no browser support so we'll just stop here
        if (!initialized) {
            CSS.addClass(DOM.root(), 'cufon-active cufon-loading');
            CSS.ready(function() {
                // fires before any replace() calls, but it doesn't really matter
                CSS.addClass(CSS.removeClass(DOM.root(), 'cufon-loading'), 'cufon-ready');
            });
            initialized = true;
        }
        if (options.hover) options.forceHitArea = true;
        if (options.autoDetect) delete options.fontFamily;
        if (typeof options.ignoreClass == 'string') {
            options.ignoreClass = new RegExp('(?:^|\\s)(?:' + options.ignoreClass.replace(/\s+/g, '|') + ')(?:\\s|$)');
        }
        if (typeof options.textShadow == 'string') {
            options.textShadow = CSS.textShadow(options.textShadow);
        }
        if (typeof options.color == 'string' && /^-/.test(options.color)) {
            options.textGradient = CSS.gradient(options.color);
        }
        else delete options.textGradient;
        if (!ignoreHistory) replaceHistory.add(elements, arguments);
        if (elements.nodeType || typeof elements == 'string') elements = [ elements ];
        CSS.ready(function() {
            for (var i = 0, l = elements.length; i < l; ++i) {
                var el = elements[i];
                if (typeof el == 'string') api.replace(options.selector(el), options, true);
                else replaceElement(el, options);
            }
        });
        return api;
    };

    api.set = function(option, value) {
        defaultOptions[option] = value;
        return api;
    };

    return api;

})();

Cufon.registerEngine('vml', (function() {

    var ns = document.namespaces;
    if (!ns) return;
    ns.add('cvml', 'urn:schemas-microsoft-com:vml');
    ns = null;

    var check = document.createElement('cvml:shape');
    check.style.behavior = 'url(#default#VML)';
    if (!check.coordsize) return; // VML isn't supported
    check = null;

    var HAS_BROKEN_LINEHEIGHT = (document.documentMode || 0) < 8;

    document.write(('<style type="text/css">' +
        'cufoncanvas{text-indent:0;}' +
        '@media screen{' +
            'cvml\\:shape,cvml\\:rect,cvml\\:fill,cvml\\:shadow{behavior:url(#default#VML);display:block;antialias:true;position:absolute;}' +
            'cufoncanvas{position:absolute;text-align:left;}' +
            'cufon{display:inline-block;position:relative;vertical-align:' +
            (HAS_BROKEN_LINEHEIGHT
                ? 'middle'
                : 'text-bottom') +
            ';}' +
            'cufon cufontext{position:absolute;left:-10000in;font-size:1px;text-align:left;}' +
            'cufonshy.cufon-shy-disabled,.cufon-viewport-resizing cufonshy{display:none;}' +
            'cufonglue{white-space:nowrap;display:inline-block;}' +
            '.cufon-viewport-resizing cufonglue{white-space:normal;}' +
            'a cufon{cursor:pointer}' + // ignore !important here
        '}' +
        '@media print{' +
            'cufon cufoncanvas{display:none;}' +
        '}' +
    '</style>').replace(/;/g, '!important;'));

    function getFontSizeInPixels(el, value) {
        return getSizeInPixels(el, /(?:em|ex|%)$|^[a-z-]+$/i.test(value) ? '1em' : value);
    }

    // Original by Dead Edwards.
    // Combined with getFontSizeInPixels it also works with relative units.
    function getSizeInPixels(el, value) {
        if (!isNaN(value) || /px$/i.test(value)) return parseFloat(value);
        var style = el.style.left, runtimeStyle = el.runtimeStyle.left;
        el.runtimeStyle.left = el.currentStyle.left;
        el.style.left = value.replace('%', 'em');
        var result = el.style.pixelLeft;
        el.style.left = style;
        el.runtimeStyle.left = runtimeStyle;
        return result;
    }

    function getSpacingValue(el, style, size, property) {
        var key = 'computed' + property, value = style[key];
        if (isNaN(value)) {
            value = style.get(property);
            style[key] = value = (value == 'normal') ? 0 : ~~size.convertFrom(getSizeInPixels(el, value));
        }
        return value;
    }

    var fills = {};

    function gradientFill(gradient) {
        var id = gradient.id;
        if (!fills[id]) {
            var stops = gradient.stops, fill = document.createElement('cvml:fill'), colors = [];
            fill.type = 'gradient';
            fill.angle = 180;
            fill.focus = '0';
            fill.method = 'none';
            fill.color = stops[0][1];
            for (var j = 1, k = stops.length - 1; j < k; ++j) {
                colors.push(stops[j][0] * 100 + '% ' + stops[j][1]);
            }
            fill.colors = colors.join(',');
            fill.color2 = stops[k][1];
            fills[id] = fill;
        }
        return fills[id];
    }

    return function(font, text, style, options, node, el, hasNext) {

        var redraw = (text === null);

        if (redraw) text = node.alt;

        var viewBox = font.viewBox;

        var size = style.computedFontSize || (style.computedFontSize = new Cufon.CSS.Size(getFontSizeInPixels(el, style.get('fontSize')) + 'px', font.baseSize));

        var wrapper, canvas;

        if (redraw) {
            wrapper = node;
            canvas = node.firstChild;
        }
        else {
            wrapper = document.createElement('cufon');
            wrapper.className = 'cufon cufon-vml';
            wrapper.alt = text;

            canvas = document.createElement('cufoncanvas');
            wrapper.appendChild(canvas);

            if (options.printable) {
                var print = document.createElement('cufontext');
                print.appendChild(document.createTextNode(text));
                wrapper.appendChild(print);
            }

            // ie6, for some reason, has trouble rendering the last VML element in the document.
            // we can work around this by injecting a dummy element where needed.
            // @todo find a better solution
            if (!hasNext) wrapper.appendChild(document.createElement('cvml:shape'));
        }

        var wStyle = wrapper.style;
        var cStyle = canvas.style;

        var height = size.convert(viewBox.height), roundedHeight = Math.ceil(height);
        var roundingFactor = roundedHeight / height;
        var stretchFactor = roundingFactor * Cufon.CSS.fontStretch(style.get('fontStretch'));
        var minX = viewBox.minX, minY = viewBox.minY;

        cStyle.height = roundedHeight;
        cStyle.top = Math.round(size.convert(minY - font.ascent));
        cStyle.left = Math.round(size.convert(minX));

        wStyle.height = size.convert(font.height) + 'px';

        var color = style.get('color');
        var chars = Cufon.CSS.textTransform(text, style).split('');

        var jumps = font.spacing(chars,
            getSpacingValue(el, style, size, 'letterSpacing'),
            getSpacingValue(el, style, size, 'wordSpacing')
        );

        if (!jumps.length) return null;

        var width = jumps.total;
        var fullWidth = -minX + width + (viewBox.width - jumps[jumps.length - 1]);

        var shapeWidth = size.convert(fullWidth * stretchFactor), roundedShapeWidth = Math.round(shapeWidth);

        var coordSize = fullWidth + ',' + viewBox.height, coordOrigin;
        var stretch = 'r' + coordSize + 'ns';

        var fill = options.textGradient && gradientFill(options.textGradient);

        var glyphs = font.glyphs, offsetX = 0;
        var shadows = options.textShadow;
        var i = -1, j = 0, chr;

        while (chr = chars[++i]) {

            var glyph = glyphs[chars[i]] || font.missingGlyph, shape;
            if (!glyph) continue;

            if (redraw) {
                // some glyphs may be missing so we can't use i
                shape = canvas.childNodes[j];
                while (shape.firstChild) shape.removeChild(shape.firstChild); // shadow, fill
            }
            else {
                shape = document.createElement('cvml:shape');
                canvas.appendChild(shape);
            }

            shape.stroked = 'f';
            shape.coordsize = coordSize;
            shape.coordorigin = coordOrigin = (minX - offsetX) + ',' + minY;
            shape.path = (glyph.d ? 'm' + glyph.d + 'xe' : '') + 'm' + coordOrigin + stretch;
            shape.fillcolor = color;

            if (fill) shape.appendChild(fill.cloneNode(false));

            // it's important to not set top/left or IE8 will grind to a halt
            var sStyle = shape.style;
            sStyle.width = roundedShapeWidth;
            sStyle.height = roundedHeight;

            if (shadows) {
                // due to the limitations of the VML shadow element there
                // can only be two visible shadows. opacity is shared
                // for all shadows.
                var shadow1 = shadows[0], shadow2 = shadows[1];
                var color1 = Cufon.CSS.color(shadow1.color), color2;
                var shadow = document.createElement('cvml:shadow');
                shadow.on = 't';
                shadow.color = color1.color;
                shadow.offset = shadow1.offX + ',' + shadow1.offY;
                if (shadow2) {
                    color2 = Cufon.CSS.color(shadow2.color);
                    shadow.type = 'double';
                    shadow.color2 = color2.color;
                    shadow.offset2 = shadow2.offX + ',' + shadow2.offY;
                }
                shadow.opacity = color1.opacity || (color2 && color2.opacity) || 1;
                shape.appendChild(shadow);
            }

            offsetX += jumps[j++];
        }

        // addresses flickering issues on :hover

        var cover = shape.nextSibling, coverFill, vStyle;

        if (options.forceHitArea) {

            if (!cover) {
                cover = document.createElement('cvml:rect');
                cover.stroked = 'f';
                cover.className = 'cufon-vml-cover';
                coverFill = document.createElement('cvml:fill');
                coverFill.opacity = 0;
                cover.appendChild(coverFill);
                canvas.appendChild(cover);
            }

            vStyle = cover.style;

            vStyle.width = roundedShapeWidth;
            vStyle.height = roundedHeight;

        }
        else if (cover) canvas.removeChild(cover);

        wStyle.width = Math.max(Math.ceil(size.convert(width * stretchFactor)), 0);

        if (HAS_BROKEN_LINEHEIGHT) {

            var yAdjust = style.computedYAdjust;

            if (yAdjust === undefined) {
                var lineHeight = style.get('lineHeight');
                if (lineHeight == 'normal') lineHeight = '1em';
                else if (!isNaN(lineHeight)) lineHeight += 'em'; // no unit
                style.computedYAdjust = yAdjust = 0.5 * (getSizeInPixels(el, lineHeight) - parseFloat(wStyle.height));
            }

            if (yAdjust) {
                wStyle.marginTop = Math.ceil(yAdjust) + 'px';
                wStyle.marginBottom = yAdjust + 'px';
            }

        }

        return wrapper;

    };

})());

Cufon.registerEngine('canvas', (function() {

    // Safari 2 doesn't support .apply() on native methods

    var check = document.createElement('canvas');
    if (!check || !check.getContext || !check.getContext.apply) return;
    check = null;

    var HAS_INLINE_BLOCK = Cufon.CSS.supports('display', 'inline-block');

    // Firefox 2 w/ non-strict doctype (almost standards mode)
    var HAS_BROKEN_LINEHEIGHT = !HAS_INLINE_BLOCK && (document.compatMode == 'BackCompat' || /frameset|transitional/i.test(document.doctype.publicId));

    var styleSheet = document.createElement('style');
    styleSheet.type = 'text/css';
    styleSheet.appendChild(document.createTextNode((
        'cufon{text-indent:0;}' +
        '@media screen,projection{' +
            'cufon{display:inline;display:inline-block;position:relative;vertical-align:middle;' +
            (HAS_BROKEN_LINEHEIGHT
                ? ''
                : 'font-size:1px;line-height:1px;') +
            '}cufon cufontext{display:-moz-inline-box;display:inline-block;width:0;height:0;text-align:left;text-indent:-10000in;}' +
            (HAS_INLINE_BLOCK
                ? 'cufon canvas{position:relative;}'
                : 'cufon canvas{position:absolute;}') +
            'cufonshy.cufon-shy-disabled,.cufon-viewport-resizing cufonshy{display:none;}' +
            'cufonglue{white-space:nowrap;display:inline-block;}' +
            '.cufon-viewport-resizing cufonglue{white-space:normal;}' +
        '}' +
        '@media print{' +
            'cufon{padding:0;}' + // Firefox 2
            'cufon canvas{display:none;}' +
        '}'
    ).replace(/;/g, '!important;')));
    document.getElementsByTagName('head')[0].appendChild(styleSheet);

    function generateFromVML(path, context) {
        var atX = 0, atY = 0;
        var code = [], re = /([mrvxe])([^a-z]*)/g, match;
        generate: for (var i = 0; match = re.exec(path); ++i) {
            var c = match[2].split(',');
            switch (match[1]) {
                case 'v':
                    code[i] = { m: 'bezierCurveTo', a: [ atX + ~~c[0], atY + ~~c[1], atX + ~~c[2], atY + ~~c[3], atX += ~~c[4], atY += ~~c[5] ] };
                    break;
                case 'r':
                    code[i] = { m: 'lineTo', a: [ atX += ~~c[0], atY += ~~c[1] ] };
                    break;
                case 'm':
                    code[i] = { m: 'moveTo', a: [ atX = ~~c[0], atY = ~~c[1] ] };
                    break;
                case 'x':
                    code[i] = { m: 'closePath' };
                    break;
                case 'e':
                    break generate;
            }
            context[code[i].m].apply(context, code[i].a);
        }
        return code;
    }

    function interpret(code, context) {
        for (var i = 0, l = code.length; i < l; ++i) {
            var line = code[i];
            context[line.m].apply(context, line.a);
        }
    }

    return function(font, text, style, options, node, el) {

        var redraw = (text === null);

        if (redraw) text = node.getAttribute('alt');

        var viewBox = font.viewBox;

        var size = style.getSize('fontSize', font.baseSize);

        var expandTop = 0, expandRight = 0, expandBottom = 0, expandLeft = 0;
        var shadows = options.textShadow, shadowOffsets = [];
        if (shadows) {
            for (var i = shadows.length; i--;) {
                var shadow = shadows[i];
                var x = size.convertFrom(parseFloat(shadow.offX));
                var y = size.convertFrom(parseFloat(shadow.offY));
                shadowOffsets[i] = [ x, y ];
                if (y < expandTop) expandTop = y;
                if (x > expandRight) expandRight = x;
                if (y > expandBottom) expandBottom = y;
                if (x < expandLeft) expandLeft = x;
            }
        }

        var chars = Cufon.CSS.textTransform(text, style).split('');

        var jumps = font.spacing(chars,
            ~~size.convertFrom(parseFloat(style.get('letterSpacing')) || 0),
            ~~size.convertFrom(parseFloat(style.get('wordSpacing')) || 0)
        );

        if (!jumps.length) return null; // there's nothing to render

        var width = jumps.total;

        expandRight += viewBox.width - jumps[jumps.length - 1];
        expandLeft += viewBox.minX;

        var wrapper, canvas;

        if (redraw) {
            wrapper = node;
            canvas = node.firstChild;
        }
        else {
            wrapper = document.createElement('cufon');
            wrapper.className = 'cufon cufon-canvas';
            wrapper.setAttribute('alt', text);

            canvas = document.createElement('canvas');
            wrapper.appendChild(canvas);

            if (options.printable) {
                var print = document.createElement('cufontext');
                print.appendChild(document.createTextNode(text));
                wrapper.appendChild(print);
            }
        }

        var wStyle = wrapper.style;
        var cStyle = canvas.style;

        var height = size.convert(viewBox.height);
        var roundedHeight = Math.ceil(height);
        var roundingFactor = roundedHeight / height;
        var stretchFactor = roundingFactor * Cufon.CSS.fontStretch(style.get('fontStretch'));
        var stretchedWidth = width * stretchFactor;

        var canvasWidth = Math.ceil(size.convert(stretchedWidth + expandRight - expandLeft));
        var canvasHeight = Math.ceil(size.convert(viewBox.height - expandTop + expandBottom));

        canvas.width = canvasWidth;
        canvas.height = canvasHeight;

        // needed for WebKit and full page zoom
        cStyle.width = canvasWidth + 'px';
        cStyle.height = canvasHeight + 'px';

        // minY has no part in canvas.height
        expandTop += viewBox.minY;

        cStyle.top = Math.round(size.convert(expandTop - font.ascent)) + 'px';
        cStyle.left = Math.round(size.convert(expandLeft)) + 'px';

        var wrapperWidth = Math.max(Math.ceil(size.convert(stretchedWidth)), 0) + 'px';

        if (HAS_INLINE_BLOCK) {
            wStyle.width = wrapperWidth;
            wStyle.height = size.convert(font.height) + 'px';
        }
        else {
            wStyle.paddingLeft = wrapperWidth;
            wStyle.paddingBottom = (size.convert(font.height) - 1) + 'px';
        }

        var g = canvas.getContext('2d'), scale = height / viewBox.height;

        // proper horizontal scaling is performed later
        g.scale(scale, scale * roundingFactor);
        g.translate(-expandLeft, -expandTop);
        g.save();

        function renderText() {
            var glyphs = font.glyphs, glyph, i = -1, j = -1, chr;
            g.scale(stretchFactor, 1);
            while (chr = chars[++i]) {
                var glyph = glyphs[chars[i]] || font.missingGlyph;
                if (!glyph) continue;
                if (glyph.d) {
                    g.beginPath();
                    if (glyph.code) interpret(glyph.code, g);
                    else glyph.code = generateFromVML('m' + glyph.d, g);
                    g.fill();
                }
                g.translate(jumps[++j], 0);
            }
            g.restore();
        }

        if (shadows) {
            for (var i = shadows.length; i--;) {
                var shadow = shadows[i];
                g.save();
                g.fillStyle = shadow.color;
                g.translate.apply(g, shadowOffsets[i]);
                renderText();
            }
        }

        var gradient = options.textGradient;
        if (gradient) {
            var stops = gradient.stops, fill = g.createLinearGradient(0, viewBox.minY, 0, viewBox.maxY);
            for (var i = 0, l = stops.length; i < l; ++i) {
                fill.addColorStop.apply(fill, stops[i]);
            }
            g.fillStyle = fill;
        }
        else g.fillStyle = style.get('color');

        renderText();

        return wrapper;

    };

})());