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sofish/pie.js

Created August 27, 2010 02:32
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pie.js
var PIE = window['PIE'];
if( !PIE ) {
PIE = window['PIE'] = {
CSS_PREFIX: '-pie-',
STYLE_PREFIX: 'Pie',
CLASS_PREFIX: 'pie_'
};
// Detect IE6
if( !window.XMLHttpRequest ) {
PIE.isIE6 = true;
// IE6 can't access properties with leading dash, but can without it.
PIE.CSS_PREFIX = PIE.CSS_PREFIX.replace( /^-/, '' );
}
// Detect IE8
PIE.ie8DocMode = element.document.documentMode;
PIE.isIE8 = !!PIE.ie8DocMode;
// Set up polling - this is a brute-force workaround for issues in IE8 caused by it not
// always firing the onmove and onresize events when elements are moved or resized.
if( PIE.ie8DocMode === 8 ) {
PIE.ie8Poller = {
fns: {},
add: function( fn ) {
var id = fn.id || ( fn.id = '' + new Date().getTime() + Math.random() );
this.fns[ id ] = fn;
},
remove: function( fn ) {
delete this.fns[ fn.id ];
},
fire: function() {
var fns = this.fns, id;
for( id in fns ) {
if( fns.hasOwnProperty( id ) ) {
fns[ id ]();
}
}
}
};
setInterval( function() { PIE.ie8Poller.fire() }, 250 )
}
/**
* Utility functions
*/
PIE.Util = {
/**
* To create a VML element, it must be created by a Document which has the VML
* namespace set. Unfortunately, if you try to add the namespace programatically
* into the main document, you will get an "Unspecified error" when trying to
* access document.namespaces before the document is finished loading. To get
* around this, we create a DocumentFragment, which in IE land is apparently a
* full-fledged Document. It allows adding namespaces immediately, so we add the
* namespace there and then have it create the VML element.
* @param {string} tag The tag name for the VML element
* @return {Element} The new VML element
*/
createVmlElement: function( tag ) {
var vmlPrefix = 'css3vml',
vmlDoc = PIE._vmlCreatorDoc;
if( !vmlDoc ) {
vmlDoc = PIE._vmlCreatorDoc = element.document.createDocumentFragment();
vmlDoc.namespaces.add( vmlPrefix, 'urn:schemas-microsoft-com:vml' );
}
return vmlDoc.createElement( vmlPrefix + ':' + tag );
},
/**
* Simple utility for merging objects
* @param {Object} obj1 The main object into which all others will be merged
* @param {...Object} var_args Other objects which will be merged into the first, in order
*/
merge: function( obj1 ) {
var i, len, p, objN, args = arguments;
for( i = 1, len = args.length; i < len; i++ ) {
objN = args[i];
for( p in objN ) {
if( objN.hasOwnProperty( p ) ) {
obj1[ p ] = objN[ p ];
}
}
}
return obj1;
},
/**
* Execute a callback function, passing it the dimensions of a given image once
* they are known.
* @param {string} src The source URL of the image
* @param {function({w:number, h:number})} func The callback function to be called once the image dimensions are known
* @param {Object} ctx A context object which will be used as the 'this' value within the executed callback function
*/
withImageSize: function( src, func, ctx ) {
var sizes = PIE._imgSizes || ( PIE._imgSizes = {} ),
size = sizes[ src ], img;
if( size ) {
func.call( ctx, size );
} else {
img = new Image();
img.onload = function() {
size = sizes[ src ] = { w: img.width, h: img.height };
func.call( ctx, size );
img.onload = null;
};
img.src = src;
}
}
};/**
* Wrapper for length and percentage style values
* @constructor
* @param {string} val The CSS string representing the length. It is assumed that this will already have
* been validated as a valid length or percentage syntax.
*/
PIE.Length = (function() {
function Length( val ) {
this.val = val;
}
Length.prototype = {
/**
* Regular expression for matching the length unit
* @private
*/
unitRE: /(px|em|ex|mm|cm|in|pt|pc|%)$/,
/**
* Get the numeric value of the length
* @return {number} The value
*/
getNumber: function() {
var num = this._number;
if( num === undefined ) {
num = this._number = parseFloat( this.val );
}
return num;
},
/**
* Get the unit of the length
* @return {string} The unit
*/
getUnit: function() {
var unit = this._unit, m;
if( !unit ) {
m = this.val.match( this.unitRE );
unit = this._unit = ( m && m[0] ) || 'px';
}
return unit;
},
/**
* Determine whether this is a percentage length value
* @return {boolean}
*/
isPercentage: function() {
return this.getUnit() === '%';
},
/**
* Resolve this length into a number of pixels.
* @param {Element} el - the context element, used to resolve font-relative values
* @param {(function():number|number)=} pct100 - the number of pixels that equal a 100% percentage. This can be either a number or a
* function which will be called to return the number.
*/
pixels: function( el, pct100 ) {
var num = this.getNumber(),
unit = this.getUnit();
switch( unit ) {
case "px":
return num;
case "%":
return num * ( typeof pct100 === 'function' ? pct100() : pct100 ) / 100;
case "em":
return num * this.getEmPixels( el );
case "ex":
return num * this.getEmPixels( el ) / 2;
default:
return num * Length.conversions[ unit ];
}
},
/**
* The em and ex units are relative to the font-size of the current element,
* however if the font-size is set using non-pixel units then we get that value
* rather than a pixel conversion. To get around this, we keep a floating element
* with width:1em which we insert into the target element and then read its offsetWidth.
* But if the font-size *is* specified in pixels, then we use that directly to avoid
* the expensive DOM manipulation.
* @param el
*/
getEmPixels: function( el ) {
var fs = el.currentStyle.fontSize,
tester, s, px;
if( fs.indexOf( 'px' ) > 0 ) {
return parseFloat( fs );
} else {
tester = this._tester;
if( !tester ) {
tester = this._tester = el.document.createElement( 'length-calc' );
s = tester.style;
s.width = '1em';
s.position = 'absolute';
s.top = s.left = -9999;
}
el.appendChild( tester );
px = tester.offsetWidth;
el.removeChild( tester );
return px;
}
}
};
Length.conversions = (function() {
var units = [ 'mm', 'cm', 'in', 'pt', 'pc' ],
vals = {},
parent = element.parentNode,
i = 0, len = units.length, unit, el, s;
for( ; i < len; i++ ) {
unit = units[i];
el = element.document.createElement( 'length-calc' );
s = el.style;
s.position = 'absolute';
s.top = s.left = -9999;
s.width = '100' + unit;
parent.appendChild( el );
vals[ unit ] = el.offsetWidth / 100;
parent.removeChild( el );
}
return vals;
})();
Length.ZERO = new Length( '0' );
return Length;
})();
/**
* Wrapper for a CSS3 bg-position value. Takes up to 2 position keywords and 2 lengths/percentages.
* @constructor
* @param {Array.<PIE.Tokenizer.Token>} tokens The tokens making up the background position value.
*/
PIE.BgPosition = (function() {
function BgPosition( tokens ) {
this.tokens = tokens;
}
BgPosition.prototype = {
/**
* Normalize the values into the form:
* [ xOffsetSide, xOffsetLength, yOffsetSide, yOffsetLength ]
* where: xOffsetSide is either 'left' or 'right',
* yOffsetSide is either 'top' or 'bottom',
* and x/yOffsetLength are both PIE.Length objects.
* @return {Array}
*/
getValues: function() {
if( !this._values ) {
var tokens = this.tokens,
len = tokens.length,
length_zero = PIE.Length.ZERO,
length_fifty = new PIE.Length( '50%' ),
type_ident = PIE.Tokenizer.Type.IDENT,
type_length = PIE.Tokenizer.Type.LENGTH,
type_percent = PIE.Tokenizer.Type.PERCENT,
type, value,
vert_idents = { 'top': 1, 'center': 1, 'bottom': 1 },
horiz_idents = { 'left': 1, 'center': 1, 'right': 1 },
vals = [ 'left', length_zero, 'top', length_zero ];
// If only one value, the second is assumed to be 'center'
if( len === 1 ) {
tokens.push( { type: type_ident, value: 'center' } );
len++;
}
// Two values - CSS2
if( len === 2 ) {
// If both idents, they can appear in either order, so switch them if needed
if( type_ident & ( tokens[0].type | tokens[1].type ) &&
tokens[0].value in vert_idents && tokens[1].value in horiz_idents ) {
tokens.push( tokens.shift() );
}
if( tokens[0].type & type_ident ) {
if( tokens[0].value === 'center' ) {
vals[1] = length_fifty;
} else {
vals[0] = tokens[0].value;
}
}
else if( tokens[0].isLengthOrPercent() ) {
vals[1] = new PIE.Length( tokens[0].value );
}
if( tokens[1].type & type_ident ) {
if( tokens[1].value === 'center' ) {
vals[3] = length_fifty;
} else {
vals[2] = tokens[1].value;
}
}
else if( tokens[1].isLengthOrPercent() ) {
vals[3] = new PIE.Length( tokens[1].value );
}
}
// Three or four values - CSS3
else {
// TODO
}
this._values = vals;
}
return this._values;
},
/**
* Find the coordinates of the background image from the upper-left corner of the background area
* @param {Element} el
* @param {number} width - the width for percentages (background area width minus image width)
* @param {number} height - the height for percentages (background area height minus image height)
* @return {Object} { x: Number, y: Number }
*/
coords: function( el, width, height ) {
var vals = this.getValues(),
pxX = vals[1].pixels( el, width ),
pxY = vals[3].pixels( el, height );
return {
x: Math.round( vals[0] === 'right' ? width - pxX : pxX ),
y: Math.round( vals[2] === 'bottom' ? height - pxY : pxY )
};
}
};
return BgPosition;
})();/**
* Wrapper for angle values; handles conversion to degrees from all allowed angle units
* @constructor
* @param {string} val The raw CSS value for the angle. It is assumed it has been pre-validated.
*/
PIE.Angle = (function() {
function Angle( val ) {
this.val = val;
}
Angle.prototype = {
unitRE: /[a-z]+$/i,
/**
* @return {string} The unit of the angle value
*/
getUnit: function() {
return this._unit || ( this._unit = this.val.match( this.unitRE )[0].toLowerCase() );
},
/**
* Get the numeric value of the angle in degrees.
* @return {number} The degrees value
*/
degrees: function() {
var deg = this._deg, u, n;
if( deg === undefined ) {
u = this.getUnit();
n = parseFloat( this.val, 10 );
deg = this._deg = ( u === 'deg' ? n : u === 'rad' ? n / Math.PI * 180 : u === 'grad' ? n / 400 * 360 : u === 'turn' ? n * 360 : 0 );
}
return deg;
}
};
return Angle;
})();/**
* Abstraction for colors values. Allows detection of rgba values.
* @constructor
* @param {string} val The raw CSS string value for the color
*/
PIE.Color = (function() {
function Color( val ) {
this.val = val;
}
/**
* Regular expression for matching rgba colors and extracting their components
* @type {RegExp}
*/
Color.rgbaRE = /\s*rgba\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d+|\d*\.\d+)\s*\)\s*/;
Color.prototype = {
/**
* @private
*/
parse: function() {
if( !this._color ) {
var v = this.val,
m = v.match( Color.rgbaRE );
if( m ) {
this._color = 'rgb(' + m[1] + ',' + m[2] + ',' + m[3] + ')';
this._alpha = parseFloat( m[4] );
} else {
this._color = v;
this._alpha = 1;
}
}
},
/**
* Retrieve the value of the color in a format usable by IE natively. This will be the same as
* the raw input value, except for rgba values which will be converted to an rgb value.
* @param {Element} el The context element, used to get 'currentColor' keyword value.
* @return {string} Color value
*/
value: function( el ) {
this.parse();
return this._color === 'currentColor' ? el.currentStyle.color : this._color;
},
/**
* Retrieve the alpha value of the color. Will be 1 for all values except for rgba values
* with an alpha component.
* @return {number} The alpha value, from 0 to 1.
*/
alpha: function() {
this.parse();
return this._alpha;
}
};
return Color;
})();/**
* A tokenizer for CSS value strings.
* @constructor
* @param {string} css The CSS value string
*/
PIE.Tokenizer = (function() {
function Tokenizer( css ) {
this.css = css;
this.ch = 0;
this.tokens = [];
this.tokenIndex = 0;
}
/**
* Enumeration of token type constants.
* @enum {number}
*/
var Type = Tokenizer.Type = {
ANGLE: 1,
CHARACTER: 2,
COLOR: 4,
DIMEN: 8,
FUNCTION: 16,
IDENT: 32,
LENGTH: 64,
NUMBER: 128,
OPERATOR: 256,
PERCENT: 512,
STRING: 1024,
URL: 2048
};
/**
* A single token
* @constructor
* @param {number} type The type of the token - see PIE.Tokenizer.Type
* @param {string} value The value of the token
*/
Tokenizer.Token = function( type, value ) {
this.type = type;
this.value = value;
};
Tokenizer.Token.prototype = {
isLength: function() {
return this.type & Type.LENGTH || ( this.type & Type.NUMBER && this.value === '0' );
},
isLengthOrPercent: function() {
return this.isLength() || this.type & Type.PERCENT;
}
};
Tokenizer.prototype = {
whitespace: /\s/,
number: /^[\+\-]?(\d*\.)?\d+/,
url: /^url\(\s*("([^"]*)"|'([^']*)'|([!#$%&*-~]*))\s*\)/i,
ident: /^\-?[_a-z][\w-]*/i,
string: /^("([^"]*)"|'([^']*)')/,
operator: /^[\/,]/,
hash: /^#[\w]+/,
hashColor: /^#([\da-f]{6}|[\da-f]{3})/i,
unitTypes: {
'px': Type.LENGTH, 'em': Type.LENGTH, 'ex': Type.LENGTH,
'mm': Type.LENGTH, 'cm': Type.LENGTH, 'in': Type.LENGTH,
'pt': Type.LENGTH, 'pc': Type.LENGTH,
'deg': Type.ANGLE, 'rad': Type.ANGLE, 'grad': Type.ANGLE
},
colorNames: {
'aqua':1, 'black':1, 'blue':1, 'fuchsia':1, 'gray':1, 'green':1, 'lime':1, 'maroon':1,
'navy':1, 'olive':1, 'purple':1, 'red':1, 'silver':1, 'teal':1, 'white':1, 'yellow': 1,
'currentColor': 1
},
colorFunctions: {
'rgb': 1, 'rgba': 1, 'hsl': 1, 'hsla': 1
},
/**
* Advance to and return the next token in the CSS string. If the end of the CSS string has
* been reached, null will be returned.
* @param {boolean} forget - if true, the token will not be stored for the purposes of backtracking with prev().
* @return {PIE.Tokenizer.Token}
*/
next: function( forget ) {
var css, ch, firstChar, match, type, val,
me = this;
function newToken( type, value ) {
var tok = new Tokenizer.Token( type, value );
if( !forget ) {
me.tokens.push( tok );
me.tokenIndex++;
}
return tok;
}
function failure() {
me.tokenIndex++;
return null;
}
// In case we previously backed up, return the stored token in the next slot
if( this.tokenIndex < this.tokens.length ) {
return this.tokens[ this.tokenIndex++ ];
}
// Move past leading whitespace characters
while( this.whitespace.test( this.css.charAt( this.ch ) ) ) {
this.ch++;
}
if( this.ch >= this.css.length ) {
return failure();
}
ch = this.ch;
css = this.css.substring( this.ch );
firstChar = css.charAt( 0 );
switch( firstChar ) {
case '#':
if( match = css.match( this.hashColor ) ) {
this.ch += match[0].length;
return newToken( Type.COLOR, match[0] );
}
break;
case '"':
case "'":
if( match = css.match( this.string ) ) {
this.ch += match[0].length;
return newToken( Type.STRING, match[2] || match[3] || '' );
}
break;
case "/":
case ",":
this.ch++;
return newToken( Type.OPERATOR, firstChar );
case 'u':
if( match = css.match( this.url ) ) {
this.ch += match[0].length;
return newToken( Type.URL, match[2] || match[3] || match[4] || '' );
}
}
// Numbers and values starting with numbers
if( match = css.match( this.number ) ) {
val = match[0];
this.ch += val.length;
// Check if it is followed by a unit
if( css.charAt( val.length ) === '%' ) {
this.ch++;
return newToken( Type.PERCENT, val + '%' );
}
if( match = css.substring( val.length ).match( this.ident ) ) {
val += match[0];
this.ch += match[0].length;
return newToken( this.unitTypes[ match[0].toLowerCase() ] || Type.DIMEN, val );
}
// Plain ol' number
return newToken( Type.NUMBER, val );
}
// Identifiers
if( match = css.match( this.ident ) ) {
val = match[0];
this.ch += val.length;
// Named colors
if( val.toLowerCase() in this.colorNames ) {
return newToken( Type.COLOR, val );
}
// Functions
if( css.charAt( val.length ) === '(' ) {
this.ch++;
// Color values in function format: rgb, rgba, hsl, hsla
if( val.toLowerCase() in this.colorFunctions ) {
function isNum( tok ) {
return tok && tok.type & Type.NUMBER;
}
function isNumOrPct( tok ) {
return tok && ( tok.type & ( Type.NUMBER | Type.PERCENT ) );
}
function isValue( tok, val ) {
return tok && tok.value === val;
}
function next() {
return me.next( 1 );
}
if( ( val.charAt(0) === 'r' ? isNumOrPct( next() ) : isNum( next() ) ) &&
isValue( next(), ',' ) &&
isNumOrPct( next() ) &&
isValue( next(), ',' ) &&
isNumOrPct( next() ) &&
( val === 'rgb' || val === 'hsa' || (
isValue( next(), ',' ) &&
isNum( next() )
) ) &&
isValue( next(), ')' ) ) {
return newToken( Type.COLOR, this.css.substring( ch, this.ch ) );
}
return failure();
}
return newToken( Type.FUNCTION, val + '(' );
}
// Other identifier
return newToken( Type.IDENT, val );
}
// Standalone character
this.ch++;
return newToken( Type.CHARACTER, firstChar );
},
/**
* Determine whether there is another token
* @return {boolean}
*/
hasNext: function() {
var next = this.next();
this.prev();
return !!next;
},
/**
* Back up and return the previous token
* @return {PIE.Tokenizer.Token}
*/
prev: function() {
return this.tokens[ this.tokenIndex-- - 2 ];
},
/**
* Retrieve all the tokens in the CSS string
* @return {Array.<PIE.Tokenizer.Token>}
*/
all: function() {
while( this.next() ) {}
return this.tokens;
},
/**
* Return a list of tokens from the current position until the given function returns
* true. The final token will not be included in the list.
* @param {function():boolean} func - test function
* @param {boolean} require - if true, then if the end of the CSS string is reached
* before the test function returns true, null will be returned instead of the
* tokens that have been found so far.
* @return {Array.<PIE.Tokenizer.Token>}
*/
until: function( func, require ) {
var list = [], t, hit;
while( t = this.next() ) {
if( func( t ) ) {
hit = true;
this.prev();
break;
}
list.push( t );
}
return require && !hit ? null : list;
}
};
return Tokenizer;
})();PIE.StyleInfoBase = {
/**
* Create a new StyleInfo class, with the standard constructor, and augmented by
* the StyleInfoBase's members.
* @param proto
*/
newStyleInfo: function( proto ) {
function StyleInfo( el ) {
this.element = el;
}
PIE.Util.merge( StyleInfo.prototype, PIE.StyleInfoBase, proto );
return StyleInfo;
},
/**
* Get an object representation of the target CSS style, caching it as long as the
* underlying CSS value hasn't changed.
* @return {Object}
*/
getProps: function() {
if( this.changed() ) {
this._props = this.parseCss( this._css = this.getCss() );
}
return this._props;
},
/**
* Get the raw CSS value for the target style
* @return {string}
*/
getCss: function() {
var el = this.element,
s = el.style,
cs = el.currentStyle,
cssProp = this.cssProperty,
styleProp = this.styleProperty,
prefixedCssProp = this._prefixedCssProp || ( this._prefixedCssProp = PIE.CSS_PREFIX + cssProp ),
prefixedStyleProp = this._prefixedStyleProp || ( this._prefixedStyleProp = PIE.STYLE_PREFIX + styleProp.charAt(0).toUpperCase() + styleProp.substring(1) );
return s[ prefixedStyleProp ] || cs.getAttribute( prefixedCssProp ) || s[ styleProp ] || cs.getAttribute( cssProp );
},
/**
* Determine whether the target CSS style is active.
* @return {boolean}
*/
isActive: function() {
return !!this.getProps();
},
/**
* Determine whether the target CSS style has changed since the last time it was parsed.
* @return {boolean}
*/
changed: function() {
return this._css !== this.getCss();
}
};
/**
* Handles parsing, caching, and detecting changes to background (and -pie-background) CSS
* @constructor
* @param {Element} el the target element
*/
PIE.BackgroundStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
cssProperty: PIE.CSS_PREFIX + 'background',
styleProperty: PIE.STYLE_PREFIX + 'Background',
attachIdents: { 'scroll':1, 'fixed':1, 'local':1 },
repeatIdents: { 'repeat-x':1, 'repeat-y':1, 'repeat':1, 'no-repeat':1 },
originIdents: { 'padding-box':1, 'border-box':1, 'content-box':1 },
clipIdents: { 'padding-box':1, 'border-box':1 },
positionIdents: { 'top':1, 'right':1, 'bottom':1, 'left':1, 'center':1 },
sizeIdents: { 'contain':1, 'cover':1 },
/**
* For background styles, we support the -pie-background property but fall back to the standard
* backround* properties. The reason we have to use the prefixed version is that IE natively
* parses the standard properties and if it sees something it doesn't know how to parse, for example
* multiple values or gradient definitions, it will throw that away and not make it available through
* currentStyle.
*
* Format of return object:
* {
* color: <PIE.Color>,
* images: [
* {
* type: 'image',
* url: 'image.png',
* repeat: <'no-repeat' | 'repeat-x' | 'repeat-y' | 'repeat'>,
* position: <PIE.BgPosition>,
* attachment: <'scroll' | 'fixed' | 'local'>,
* origin: <'border-box' | 'padding-box' | 'content-box'>,
* clip: <'border-box' | 'padding-box'>,
* size: <'contain' | 'cover' | { w: <'auto' | PIE.Length>, h: <'auto' | PIE.Length> }>
* },
* {
* type: 'linear-gradient',
* gradientStart: <PIE.BgPosition>,
* angle: <PIE.Angle>,
* stops: [
* { color: <PIE.Color>, offset: <PIE.Length> },
* { color: <PIE.Color>, offset: <PIE.Length> }, ...
* ]
* }
* ]
* }
* @param {String} css
* @override
*/
parseCss: function( css ) {
var el = this.element,
cs = el.currentStyle,
rs = el.runtimeStyle,
tokenizer, token, image,
tok_type = PIE.Tokenizer.Type,
type_operator = tok_type.OPERATOR,
type_ident = tok_type.IDENT,
type_color = tok_type.COLOR,
tokType, tokVal,
positionIdents = this.positionIdents,
gradient, stop,
props = null;
function isBgPosToken( token ) {
return token.isLengthOrPercent() || ( token.type & type_ident && token.value in positionIdents );
}
function sizeToken( token ) {
return ( token.isLengthOrPercent() && new PIE.Length( token.value ) ) || ( token.value === 'auto' && 'auto' );
}
// If the CSS3-specific -pie-background property is present, parse it
if( this.getCss3() ) {
tokenizer = new PIE.Tokenizer( css );
props = { images: [] };
image = {};
while( token = tokenizer.next() ) {
tokType = token.type;
tokVal = token.value;
if( !image.type && tokType & tok_type.FUNCTION && tokVal === 'linear-gradient(' ) {
gradient = { stops: [], type: 'linear-gradient' };
stop = {};
while( token = tokenizer.next() ) {
tokType = token.type;
tokVal = token.value;
// If we reached the end of the function and had at least 2 stops, flush the info
if( tokType & tok_type.CHARACTER && tokVal === ')' ) {
if( stop.color ) {
gradient.stops.push( stop );
}
if( gradient.stops.length > 1 ) {
PIE.Util.merge( image, gradient );
}
break;
}
// Color stop - must start with color
if( tokType & type_color ) {
// if we already have an angle/position, make sure that the previous token was a comma
if( gradient.angle || gradient.gradientStart ) {
token = tokenizer.prev();
if( token.type !== type_operator ) {
break; //fail
}
tokenizer.next();
}
stop = {
color: new PIE.Color( tokVal )
};
// check for offset following color
token = tokenizer.next();
if( token.isLengthOrPercent() ) {
stop.offset = new PIE.Length( token.value );
} else {
tokenizer.prev();
}
}
// Angle - can only appear in first spot
else if( tokType & tok_type.ANGLE && !gradient.angle && !stop.color && !gradient.stops.length ) {
gradient.angle = new PIE.Angle( token.value );
}
else if( isBgPosToken( token ) && !gradient.gradientStart && !stop.color && !gradient.stops.length ) {
tokenizer.prev();
gradient.gradientStart = new PIE.BgPosition(
tokenizer.until( function( t ) {
return !isBgPosToken( t );
}, false )
);
}
else if( tokType & type_operator && tokVal === ',' ) {
if( stop.color ) {
gradient.stops.push( stop );
stop = {};
}
}
else {
// Found something we didn't recognize; fail without adding image
break;
}
}
}
else if( !image.type && tokType & tok_type.URL ) {
image.url = tokVal;
image.type = 'image';
}
else if( isBgPosToken( token ) && !image.size ) {
tokenizer.prev();
image.position = new PIE.BgPosition(
tokenizer.until( function( t ) {
return !isBgPosToken( t );
}, false )
);
}
else if( tokType & type_ident ) {
if( tokVal in this.repeatIdents ) {
image.repeat = tokVal;
}
else if( tokVal in this.originIdents ) {
image.origin = tokVal;
if( tokVal in this.clipIdents ) {
image.clip = tokVal;
}
}
else if( tokVal in this.attachIdents ) {
image.attachment = tokVal;
}
}
else if( tokType & type_color && !props.color ) {
props.color = new PIE.Color( tokVal );
}
else if( tokType & type_operator ) {
// background size
if( tokVal === '/' ) {
token = tokenizer.next();
tokType = token.type;
tokVal = token.value;
if( tokType & type_ident && tokVal in this.sizeIdents ) {
image.size = tokVal;
}
else if( tokVal = sizeToken( token ) ) {
image.size = {
w: tokVal,
h: sizeToken( tokenizer.next() ) || ( tokenizer.prev() && tokVal )
};
}
}
// new layer
else if( tokVal === ',' && image.type ) {
props.images.push( image );
image = {};
}
}
else {
// Found something unrecognized; chuck everything
return null;
}
}
// leftovers
if( image.type ) {
props.images.push( image );
}
}
// Otherwise, use the standard background properties; let IE give us the values rather than parsing them
else {
this.withActualBg( function() {
var posX = cs.backgroundPositionX,
posY = cs.backgroundPositionY,
img = cs.backgroundImage,
color = cs.backgroundColor;
props = {};
if( color !== 'transparent' ) {
props.color = new PIE.Color( color )
}
if( img !== 'none' ) {
props.images = [ {
type: 'image',
url: new PIE.Tokenizer( img ).next().value,
repeat: cs.backgroundRepeat,
position: new PIE.BgPosition( new PIE.Tokenizer( posX + ' ' + posY ).all() )
} ];
}
} );
}
return props;
},
/**
* Execute a function with the actual background styles (not overridden with runtimeStyle
* properties set by the renderers) available via currentStyle.
* @param fn
*/
withActualBg: function( fn ) {
var rs = this.element.runtimeStyle,
rsImage = rs.backgroundImage,
rsColor = rs.backgroundColor,
ret;
rs.backgroundImage = rs.backgroundColor = '';
ret = fn.call( this );
rs.backgroundImage = rsImage;
rs.backgroundColor = rsColor;
return ret;
},
getCss: function() {
var cs = this.element.currentStyle;
return this.getCss3() ||
this.withActualBg( function() {
return cs.backgroundColor + ' ' + cs.backgroundImage + ' ' + cs.backgroundRepeat + ' ' +
cs.backgroundPositionX + ' ' + cs.backgroundPositionY;
} );
},
getCss3: function() {
var el = this.element;
return el.style[ this.styleProperty ] || el.currentStyle.getAttribute( this.cssProperty );
},
/**
* The isActive logic is slightly different, because getProps() always returns an object
* even if it is just falling back to the native background properties. But we only want
* to report is as being "active" if the -pie-background override property is present and
* parses successfully.
*/
isActive: function() {
return this.getCss3() && !!this.getProps();
}
} );/**
* Handles parsing, caching, and detecting changes to border CSS
* @constructor
* @param {Element} el the target element
*/
PIE.BorderStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
sides: [ 'Top', 'Right', 'Bottom', 'Left' ],
namedWidths: {
thin: '1px',
medium: '3px',
thick: '5px'
},
parseCss: function( css ) {
var w = {},
s = {},
c = {},
active = false,
colorsSame = true,
stylesSame = true,
widthsSame = true;
this.withActualBorder( function() {
var el = this.element,
cs = el.currentStyle,
i = 0,
style, color, width, lastStyle, lastColor, lastWidth, side, ltr;
for( ; i < 4; i++ ) {
side = this.sides[ i ];
ltr = side.charAt(0).toLowerCase();
style = s[ ltr ] = cs[ 'border' + side + 'Style' ];
color = cs[ 'border' + side + 'Color' ];
width = cs[ 'border' + side + 'Width' ];
if( i > 0 ) {
if( style !== lastStyle ) { stylesSame = false; }
if( color !== lastColor ) { colorsSame = false; }
if( width !== lastWidth ) { widthsSame = false; }
}
lastStyle = style;
lastColor = color;
lastWidth = width;
c[ ltr ] = new PIE.Color( color );
width = w[ ltr ] = new PIE.Length( s[ ltr ] === 'none' ? '0' : ( this.namedWidths[ width ] || width ) );
if( width.pixels( this.element ) > 0 ) {
active = true;
}
}
} );
return active ? {
widths: w,
styles: s,
colors: c,
widthsSame: widthsSame,
colorsSame: colorsSame,
stylesSame: stylesSame
} : null;
},
getCss: function() {
var el = this.element,
cs = el.currentStyle,
css;
this.withActualBorder( function() {
css = cs.borderWidth + '|' + cs.borderStyle + '|' + cs.borderColor;
} );
return css;
},
/**
* Execute a function with the actual border styles (not overridden with runtimeStyle
* properties set by the renderers) available via currentStyle.
* @param fn
*/
withActualBorder: function( fn ) {
var rs = this.element.runtimeStyle,
rsWidth = rs.borderWidth,
rsStyle = rs.borderStyle,
rsColor = rs.borderColor,
ret;
rs.borderWidth = rs.borderStyle = rs.borderColor = '';
ret = fn.call( this );
rs.borderWidth = rsWidth;
rs.borderStyle = rsStyle;
rs.borderColor = rsColor;
return ret;
}
} );
/**
* Handles parsing, caching, and detecting changes to border-radius CSS
* @constructor
* @param {Element} el the target element
*/
(function() {
PIE.BorderRadiusStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
cssProperty: 'border-radius',
styleProperty: 'borderRadius',
parseCss: function( css ) {
var p = null, x, y,
tokenizer, token, length,
hasNonZero = false;
function newLength( v ) {
return new PIE.Length( v );
}
if( css ) {
tokenizer = new PIE.Tokenizer( css );
function collectLengths() {
var arr = [], num;
while( ( token = tokenizer.next() ) && token.isLengthOrPercent() ) {
length = newLength( token.value );
num = length.getNumber();
if( num < 0 ) {
return null;
}
if( num > 0 ) {
hasNonZero = true;
}
arr.push( length );
}
return arr.length > 0 && arr.length < 5 ? {
'tl': arr[0],
'tr': arr[1] || arr[0],
'br': arr[2] || arr[0],
'bl': arr[3] || arr[1] || arr[0]
} : null;
}
// Grab the initial sequence of lengths
if( x = collectLengths() ) {
// See if there is a slash followed by more lengths, for the y-axis radii
if( token ) {
if( token.type & PIE.Tokenizer.Type.OPERATOR && token.value === '/' ) {
y = collectLengths();
}
} else {
y = x;
}
// Treat all-zero values the same as no value
if( hasNonZero && x && y ) {
p = { x: x, y : y };
}
}
}
return p;
}
} );
var ZERO = PIE.Length.ZERO,
zeros = { 'tl': ZERO, 'tr': ZERO, 'br': ZERO, 'bl': ZERO };
PIE.BorderRadiusStyleInfo.ALL_ZERO = { x: zeros, y: zeros };
})();/**
* Handles parsing, caching, and detecting changes to border-image CSS
* @constructor
* @param {Element} el the target element
*/
PIE.BorderImageStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
cssProperty: 'border-image',
styleProperty: 'borderImage',
repeatIdents: { 'stretch':1, 'round':1, 'repeat':1, 'space':1 },
parseCss: function( css ) {
var p = null, tokenizer, token, type, value,
slices, widths, outsets,
slashCount = 0, cs,
Type = PIE.Tokenizer.Type,
IDENT = Type.IDENT,
NUMBER = Type.NUMBER,
LENGTH = Type.LENGTH,
PERCENT = Type.PERCENT;
if( css ) {
tokenizer = new PIE.Tokenizer( css );
p = {};
function isSlash( token ) {
return token && ( token.type & Type.OPERATOR ) && ( token.value === '/' );
}
function isFillIdent( token ) {
return token && ( token.type & IDENT ) && ( token.value === 'fill' );
}
function collectSlicesEtc() {
slices = tokenizer.until( function( tok ) {
return !( tok.type & ( NUMBER | PERCENT ) );
} );
if( isFillIdent( tokenizer.next() ) && !p.fill ) {
p.fill = true;
} else {
tokenizer.prev();
}
if( isSlash( tokenizer.next() ) ) {
slashCount++;
widths = tokenizer.until( function( tok ) {
return !( token.type & ( NUMBER | PERCENT | LENGTH ) ) && !( ( token.type & IDENT ) && token.value === 'auto' );
} );
if( isSlash( tokenizer.next() ) ) {
slashCount++;
outsets = tokenizer.until( function( tok ) {
return !( token.type & ( NUMBER | LENGTH ) );
} );
}
} else {
tokenizer.prev();
}
}
while( token = tokenizer.next() ) {
type = token.type;
value = token.value;
// Numbers and/or 'fill' keyword: slice values. May be followed optionally by width values, followed optionally by outset values
if( type & ( NUMBER | PERCENT ) && !slices ) {
tokenizer.prev();
collectSlicesEtc();
}
else if( isFillIdent( token ) && !p.fill ) {
p.fill = true;
collectSlicesEtc();
}
// Idents: one or values for 'repeat'
else if( ( type & IDENT ) && this.repeatIdents[value] && !p.repeat ) {
p.repeat = { h: value };
if( token = tokenizer.next() ) {
if( ( token.type & IDENT ) && this.repeatIdents[token.value] ) {
p.repeat.v = token.value;
} else {
tokenizer.prev();
}
}
}
// URL of the image
else if( ( type & Type.URL ) && !p.src ) {
p.src = value;
}
// Found something unrecognized; exit.
else {
return null;
}
}
// Validate what we collected
if( !p.src || !slices || slices.length < 1 || slices.length > 4 ||
( widths && widths.length > 4 ) || ( slashCount === 1 && widths.length < 1 ) ||
( outsets && outsets.length > 4 ) || ( slashCount === 2 && outsets.length < 1 ) ) {
return null;
}
// Fill in missing values
if( !p.repeat ) {
p.repeat = { h: 'stretch' };
}
if( !p.repeat.v ) {
p.repeat.v = p.repeat.h;
}
function distributeSides( tokens, convertFn ) {
return {
t: convertFn( tokens[0] ),
r: convertFn( tokens[1] || tokens[0] ),
b: convertFn( tokens[2] || tokens[0] ),
l: convertFn( tokens[3] || tokens[1] || tokens[0] )
};
}
p.slice = distributeSides( slices, function( tok ) {
return new PIE.Length( ( tok.type & NUMBER ) ? tok.value + 'px' : tok.value );
} );
p.width = widths && widths.length > 0 ?
distributeSides( widths, function( tok ) {
return tok.type & ( LENGTH | PERCENT ) ? new PIE.Length( tok.value ) : tok.value;
} ) :
( cs = this.element.currentStyle ) && {
t: new PIE.Length( cs.borderTopWidth ),
r: new PIE.Length( cs.borderRightWidth ),
b: new PIE.Length( cs.borderBottomWidth ),
l: new PIE.Length( cs.borderLeftWidth )
};
p.outset = distributeSides( outsets || [ 0 ], function( tok ) {
return tok.type & LENGTH ? new PIE.Length( tok.value ) : tok.value;
} );
}
return p;
}
} );/**
* Handles parsing, caching, and detecting changes to box-shadow CSS
* @constructor
* @param {Element} el the target element
*/
PIE.BoxShadowStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
cssProperty: 'box-shadow',
styleProperty: 'boxShadow',
parseCss: function( css ) {
var props,
Length = PIE.Length,
Type = PIE.Tokenizer.Type,
tokenizer;
if( css ) {
tokenizer = new PIE.Tokenizer( css );
props = { outset: [], inset: [] };
function parseItem() {
var token, type, value, color, lengths, inset, len;
while( token = tokenizer.next() ) {
value = token.value;
type = token.type;
if( type & Type.OPERATOR && value === ',' ) {
break;
}
else if( token.isLength() && !lengths ) {
tokenizer.prev();
lengths = tokenizer.until( function( token ) {
return !token.isLength();
} );
}
else if( type & Type.COLOR && !color ) {
color = value;
}
else if( type & Type.IDENT && value === 'inset' && !inset ) {
inset = true;
}
else { //encountered an unrecognized token; fail.
return false;
}
}
len = lengths && lengths.length;
if( len > 1 && len < 5 ) {
( inset ? props.inset : props.outset ).push( {
xOffset: new Length( lengths[0].value ),
yOffset: new Length( lengths[1].value ),
blur: new Length( lengths[2] ? lengths[2].value : '0' ),
spread: new Length( lengths[3] ? lengths[3].value : '0' ),
color: new PIE.Color( color || 'currentColor' )
} );
return true;
}
return false;
}
while( parseItem() ) {}
}
return props && ( props.inset.length || props.outset.length ) ? props : null;
}
} );
/**
* Retrieves the state of the element's visibility and display
* @constructor
* @param {Element} el the target element
*/
PIE.VisibilityStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
getCss: function() {
var cs = this.element.currentStyle;
return cs.visibility + '|' + cs.display;
},
parseCss: function() {
var el = this.element,
rs = el.runtimeStyle,
cs = el.currentStyle,
rsVis = rs.visibility,
csVis;
rs.visibility = '';
csVis = cs.visibility;
rs.visibility = rsVis;
return {
visible: csVis !== 'hidden',
displayed: cs.display !== 'none'
}
},
/**
* Always return false for isActive, since this property alone will not trigger
* a renderer to do anything.
*/
isActive: function() {
return false;
}
} );
PIE.RendererBase = {
/**
* Create a new Renderer class, with the standard constructor, and augmented by
* the RendererBase's members.
* @param proto
*/
newRenderer: function( proto ) {
function Renderer( el, styleInfos, parent ) {
this.element = el;
this.styleInfos = styleInfos;
this.parent = parent;
}
PIE.Util.merge( Renderer.prototype, PIE.RendererBase, proto );
return Renderer;
},
/**
* Determine if the renderer needs to be updated
* @return {boolean}
*/
needsUpdate: function() {
return false;
},
/**
* Tell the renderer to update based on modified properties
*/
updateProps: function() {
},
/**
* Tell the renderer to update based on modified element position
*/
updatePos: function() {
},
/**
* Tell the renderer to update based on modified element dimensions
*/
updateSize: function() {
},
/**
* Add a layer element, with the given z-order index, to the renderer's main box element. We can't use
* z-index because that breaks when the root rendering box's z-index is 'auto' in IE8+ standards mode.
* So instead we make sure they are inserted into the DOM in the correct order.
* @param {number} index
* @param {Element} el
*/
addLayer: function( index, el ) {
this.removeLayer( index );
for( var layers = this._layers || ( this._layers = [] ), i = index + 1, len = layers.length, layer; i < len; i++ ) {
layer = layers[i];
if( layer ) {
break;
}
}
layers[index] = el;
this.getBox().insertBefore( el, layer || null );
},
/**
* Retrieve a layer element by its index, or null if not present
* @param {number} index
* @return {Element}
*/
getLayer: function( index ) {
var layers = this._layers;
return layers && layers[index] || null;
},
/**
* Remove a layer element by its index
* @param {number} index
*/
removeLayer: function( index ) {
var layer = this.getLayer( index ),
box = this._box;
if( layer && box ) {
box.removeChild( layer );
this._layers[index] = null;
}
},
/**
* Get a VML shape by name, creating it if necessary.
* @param {string} name A name identifying the element
* @param {string=} subElName If specified a subelement of the shape will be created with this tag name
* @param {Element} parent The parent element for the shape; will be ignored if 'group' is specified
* @param {number=} group If specified, an ordinal group for the shape. 1 or greater. Groups are rendered
* using container elements in the correct order, to get correct z stacking without z-index.
*/
getShape: function( name, subElName, parent, group ) {
var shapes = this._shapes || ( this._shapes = {} ),
shape = shapes[ name ],
s;
if( !shape ) {
shape = shapes[ name ] = PIE.Util.createVmlElement( 'shape' );
if( subElName ) {
shape.appendChild( shape[ subElName ] = PIE.Util.createVmlElement( subElName ) );
}
if( group ) {
parent = this.getLayer( group );
if( !parent ) {
this.addLayer( group, this.element.document.createElement( 'group' + group ) );
parent = this.getLayer( group );
}
}
parent.appendChild( shape );
s = shape.style;
s.position = 'absolute';
s.left = s.top = 0;
s['behavior'] = 'url(#default#VML)';
}
return shape;
},
/**
* Delete a named shape which was created by getShape(). Returns true if a shape with the
* given name was found and deleted, or false if there was no shape of that name.
* @param {string} name
* @return {boolean}
*/
deleteShape: function( name ) {
var shapes = this._shapes,
shape = shapes && shapes[ name ];
if( shape ) {
shape.parentNode.removeChild( shape );
delete shapes[ name ];
}
return !!shape;
},
/**
* For a given set of border radius length/percentage values, convert them to concrete pixel
* values based on the current size of the target element.
* @param {Object} radii
* @return {Object}
*/
getRadiiPixels: function( radii ) {
var el = this.element,
w = el.offsetWidth,
h = el.offsetHeight,
tlX, tlY, trX, trY, brX, brY, blX, blY, f;
tlX = radii.x['tl'].pixels( el, w );
tlY = radii.y['tl'].pixels( el, h );
trX = radii.x['tr'].pixels( el, w );
trY = radii.y['tr'].pixels( el, h );
brX = radii.x['br'].pixels( el, w );
brY = radii.y['br'].pixels( el, h );
blX = radii.x['bl'].pixels( el, w );
blY = radii.y['bl'].pixels( el, h );
// If any corner ellipses overlap, reduce them all by the appropriate factor. This formula
// is taken straight from the CSS3 Backgrounds and Borders spec.
f = Math.min(
w / ( tlX + trX ),
h / ( trY + brY ),
w / ( blX + brX ),
h / ( tlY + blY )
);
if( f < 1 ) {
tlX *= f;
tlY *= f;
trX *= f;
trY *= f;
brX *= f;
brY *= f;
blX *= f;
blY *= f;
}
return {
x: {
'tl': tlX,
'tr': trX,
'br': brX,
'bl': blX
},
y: {
'tl': tlY,
'tr': trY,
'br': brY,
'bl': blY
}
}
},
/**
* Return the VML path string for the element's background box, with corners rounded.
* @param {Object.<{t:number, r:number, b:number, l:number}>} shrink - if present, specifies number of
* pixels to shrink the box path inward from the element's four sides.
* @param {number=} mult If specified, all coordinates will be multiplied by this number
* @param {Object=} radii If specified, this will be used for the corner radii instead of the properties
* from this renderer's borderRadiusInfo object.
* @return {string} the VML path
*/
getBoxPath: function( shrink, mult, radii ) {
mult = mult || 1;
var r, str,
el = this.element,
w = el.offsetWidth * mult,
h = el.offsetHeight * mult,
radInfo = this.styleInfos.borderRadiusInfo,
floor = Math.floor, ceil = Math.ceil,
shrinkT = shrink ? shrink.t * mult : 0,
shrinkR = shrink ? shrink.r * mult : 0,
shrinkB = shrink ? shrink.b * mult : 0,
shrinkL = shrink ? shrink.l * mult : 0,
tlX, tlY, trX, trY, brX, brY, blX, blY;
if( radii || radInfo.isActive() ) {
r = this.getRadiiPixels( radii || radInfo.getProps() );
tlX = r.x['tl'] * mult;
tlY = r.y['tl'] * mult;
trX = r.x['tr'] * mult;
trY = r.y['tr'] * mult;
brX = r.x['br'] * mult;
brY = r.y['br'] * mult;
blX = r.x['bl'] * mult;
blY = r.y['bl'] * mult;
str = 'm' + floor( shrinkL ) + ',' + floor( tlY ) +
'qy' + floor( tlX ) + ',' + floor( shrinkT ) +
'l' + ceil( w - trX ) + ',' + floor( shrinkT ) +
'qx' + ceil( w - shrinkR ) + ',' + floor( trY ) +
'l' + ceil( w - shrinkR ) + ',' + ceil( h - brY ) +
'qy' + ceil( w - brX ) + ',' + ceil( h - shrinkB ) +
'l' + floor( blX ) + ',' + ceil( h - shrinkB ) +
'qx' + floor( shrinkL ) + ',' + ceil( h - blY ) + ' x e';
} else {
// simplified path for non-rounded box
str = 'm' + floor( shrinkL ) + ',' + floor( shrinkT ) +
'l' + ceil( w - shrinkR ) + ',' + floor( shrinkT ) +
'l' + ceil( w - shrinkR ) + ',' + ceil( h - shrinkB ) +
'l' + floor( shrinkL ) + ',' + ceil( h - shrinkB ) +
'xe';
}
return str;
},
/**
* Get the container element for the shapes, creating it if necessary.
*/
getBox: function() {
var box = this.parent.getLayer( this.zIndex ), s;
if( !box ) {
box = this.element.document.createElement( this.boxName );
s = box.style;
s.position = 'absolute';
s.top = s.left = 0;
this.parent.addLayer( this.zIndex, box );
}
return box;
},
/**
* Destroy the rendered objects. This is a base implementation which handles common renderer
* structures, but individual renderers may override as necessary.
*/
destroy: function() {
this.parent.removeLayer( this.zIndex );
delete this._shapes;
delete this._layers;
}
};
/**
* Root renderer; creates the outermost container element and handles keeping it aligned
* with the target element's size and position.
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
*/
PIE.RootRenderer = PIE.RendererBase.newRenderer( {
isActive: function() {
var infos = this.styleInfos;
for( var i in infos ) {
if( infos.hasOwnProperty( i ) && infos[ i ].isActive() ) {
return true;
}
}
return false;
},
needsUpdate: function() {
return this.styleInfos.visibilityInfo.changed();
},
updatePos: function() {
if( this.isActive() ) {
var el = this.element,
par = el,
docEl,
elRect, parRect,
s = this.getBox().style, cs,
x = 0, y = 0;
// Get the element's offsets from its nearest positioned ancestor. Uses
// getBoundingClientRect for accuracy and speed.
do {
par = par.offsetParent;
} while( par && par.currentStyle.position === 'static' );
elRect = el.getBoundingClientRect();
if( par ) {
parRect = par.getBoundingClientRect();
cs = par.currentStyle;
x = elRect.left - parRect.left - ( parseFloat(cs.borderLeftWidth) || 0 );
y = elRect.top - parRect.top - ( parseFloat(cs.borderTopWidth) || 0 );
} else {
docEl = el.document.documentElement;
x = elRect.left + docEl.scrollLeft - docEl.clientLeft;
y = elRect.top + docEl.scrollTop - docEl.clientTop;
}
s.left = x;
s.top = y;
s.zIndex = el.currentStyle.position === 'static' ? -1 : el.currentStyle.zIndex;
}
},
updateSize: function() {
// NO-OP
},
updateVisibility: function() {
var vis = this.styleInfos.visibilityInfo.getProps();
this.getBox().style.display = ( vis.visible && vis.displayed ) ? '' : 'none';
},
updateProps: function() {
if( this.isActive() ) {
this.updateVisibility();
} else {
this.destroy();
}
},
getBox: function() {
var box = this._box, el, s;
if( !box ) {
el = this.element;
box = this._box = el.document.createElement( 'css3-container' );
s = box.style;
s.position = el.currentStyle.position === 'fixed' ? 'fixed' : 'absolute';
this.updateVisibility();
el.parentNode.insertBefore( box, el );
}
return box;
},
destroy: function() {
var box = this._box;
if( box && box.parentNode ) {
box.parentNode.removeChild( box );
}
delete this._box;
delete this._layers;
}
} );
/**
* Renderer for element backgrounds.
* @constructor
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
* @param {PIE.RootRenderer} parent
*/
PIE.BackgroundRenderer = PIE.RendererBase.newRenderer( {
zIndex: 2,
boxName: 'background',
needsUpdate: function() {
var si = this.styleInfos;
return si.backgroundInfo.changed() || si.borderRadiusInfo.changed();
},
isActive: function() {
var si = this.styleInfos,
el = this.element;
return el.offsetWidth && el.offsetHeight && (
si.borderImageInfo.isActive() ||
si.borderRadiusInfo.isActive() ||
si.backgroundInfo.isActive() ||
( si.boxShadowInfo.isActive() && si.boxShadowInfo.getProps().inset ) );
},
updateSize: function() {
if( this.isActive() ) {
this.draw();
}
},
updateProps: function() {
this.destroy();
if( this.isActive() ) {
this.draw();
}
},
/**
* Draw the shapes
*/
draw: function() {
this.drawBgColor();
this.drawBgImages();
},
/**
* Draw the background color shape
*/
drawBgColor: function() {
var props = this.styleInfos.backgroundInfo.getProps(),
el = this.element,
color = props && props.color && props.color.value( el ),
shape, w, h, s, alpha;
if( color && color !== 'transparent' ) {
this.hideBackground();
shape = this.getShape( 'bgColor', 'fill', this.getBox(), 1 );
w = el.offsetWidth;
h = el.offsetHeight;
shape.stroked = false;
shape.coordsize = w * 2 + ',' + h * 2;
shape.coordorigin = '1,1';
shape.path = this.getBoxPath( null, 2 );
s = shape.style;
s.width = w;
s.height = h;
shape.fill.color = color;
alpha = props.color.alpha();
if( alpha < 1 ) {
shape.fill.opacity = alpha;
}
} else {
this.deleteShape( 'bgColor' );
}
},
/**
* Draw all the background image layers
*/
drawBgImages: function() {
var props = this.styleInfos.backgroundInfo.getProps(),
images = props && props.images,
img, el, shape, w, h, s, i;
if( images ) {
this.hideBackground();
el = this.element;
w = el.offsetWidth,
h = el.offsetHeight,
i = images.length;
while( i-- ) {
img = images[i];
shape = this.getShape( 'bgImage' + i, 'fill', this.getBox(), 2 );
shape.stroked = false;
shape.fill.type = 'tile';
shape.fillcolor = 'none';
shape.coordsize = w * 2 + ',' + h * 2;
shape.coordorigin = '1,1';
shape.path = this.getBoxPath( 0, 2 );
s = shape.style;
s.width = w;
s.height = h;
if( img.type === 'linear-gradient' ) {
this.addLinearGradient( shape, img );
}
else {
shape.fill.src = img.url;
this.positionBgImage( shape, i );
}
}
}
// Delete any bgImage shapes previously created which weren't used above
i = images ? images.length : 0;
while( this.deleteShape( 'bgImage' + i++ ) ) {}
},
/**
* Set the position and clipping of the background image for a layer
* @param {Element} shape
* @param {number} index
*/
positionBgImage: function( shape, index ) {
PIE.Util.withImageSize( shape.fill.src, function( size ) {
var fill = shape.fill,
el = this.element,
elW = el.offsetWidth,
elH = el.offsetHeight,
cs = el.currentStyle,
si = this.styleInfos,
border = si.borderInfo.getProps(),
bw = border && border.widths,
bwT = bw ? bw['t'].pixels( el ) : 0,
bwR = bw ? bw['r'].pixels( el ) : 0,
bwB = bw ? bw['b'].pixels( el ) : 0,
bwL = bw ? bw['l'].pixels( el ) : 0,
bg = si.backgroundInfo.getProps().images[ index ],
bgPos = bg.position ? bg.position.coords( el, elW - size.w - bwL - bwR, elH - size.h - bwT - bwB ) : { x:0, y:0 },
repeat = bg.repeat,
pxX, pxY,
clipT = 0, clipL = 0,
clipR = elW + 1, clipB = elH + 1, //make sure the default clip region is not inside the box (by a subpixel)
clipAdjust = PIE.isIE8 ? 0 : 1; //prior to IE8 requires 1 extra pixel in the image clip region
// Positioning - find the pixel offset from the top/left and convert to a ratio
// The position is shifted by half a pixel, to adjust for the half-pixel coordorigin shift which is
// needed to fix antialiasing but makes the bg image fuzzy.
pxX = bgPos.x + bwL + 0.5;
pxY = bgPos.y + bwT + 0.5;
fill.position = ( pxX / elW ) + ',' + ( pxY / elH );
// Repeating - clip the image shape
if( repeat && repeat !== 'repeat' ) {
if( repeat === 'repeat-x' || repeat === 'no-repeat' ) {
clipT = pxY + 1;
clipB = pxY + size.h + clipAdjust;
}
if( repeat === 'repeat-y' || repeat === 'no-repeat' ) {
clipL = pxX + 1;
clipR = pxX + size.w + clipAdjust;
}
shape.style.clip = 'rect(' + clipT + 'px,' + clipR + 'px,' + clipB + 'px,' + clipL + 'px)';
}
}, this );
},
/**
* Draw the linear gradient for a gradient layer
* @param {Element} shape
* @param {Object} info The object holding the information about the gradient
*/
addLinearGradient: function( shape, info ) {
var el = this.element,
w = el.offsetWidth,
h = el.offsetHeight,
fill = shape.fill,
angle = info.angle,
startPos = info.gradientStart,
stops = info.stops,
stopCount = stops.length,
PI = Math.PI,
startX, startY,
endX, endY,
startCornerX, startCornerY,
endCornerX, endCornerY,
vmlAngle, vmlGradientLength, vmlColors,
deltaX, deltaY, lineLength,
stopPx, vmlOffsetPct,
p, i, j, before, after;
/**
* Find the point along a given line (defined by a starting point and an angle), at which
* that line is intersected by a perpendicular line extending through another point.
* @param x1 - x coord of the starting point
* @param y1 - y coord of the starting point
* @param angle - angle of the line extending from the starting point (in degrees)
* @param x2 - x coord of point along the perpendicular line
* @param y2 - y coord of point along the perpendicular line
* @return [ x, y ]
*/
function perpendicularIntersect( x1, y1, angle, x2, y2 ) {
// Handle straight vertical and horizontal angles, for performance and to avoid
// divide-by-zero errors.
if( angle === 0 || angle === 180 ) {
return [ x2, y1 ];
}
else if( angle === 90 || angle === 270 ) {
return [ x1, y2 ];
}
else {
// General approach: determine the Ax+By=C formula for each line (the slope of the second
// line is the negative inverse of the first) and then solve for where both formulas have
// the same x/y values.
var a1 = Math.tan( -angle * PI / 180 ),
c1 = a1 * x1 - y1,
a2 = -1 / a1,
c2 = a2 * x2 - y2,
d = a2 - a1,
endX = ( c2 - c1 ) / d,
endY = ( a1 * c2 - a2 * c1 ) / d;
return [ endX, endY ];
}
}
// Find the "start" and "end" corners; these are the corners furthest along the gradient line.
// This is used below to find the start/end positions of the CSS3 gradient-line, and also in finding
// the total length of the VML rendered gradient-line corner to corner.
function findCorners() {
startCornerX = ( angle >= 90 && angle < 270 ) ? w : 0;
startCornerY = angle < 180 ? h : 0;
endCornerX = w - startCornerX;
endCornerY = h - startCornerY;
}
// Normalize the angle to a value between [0, 360)
function normalizeAngle() {
if( angle < 0 ) {
angle += 360;
}
angle = angle % 360;
}
// Find the distance between two points
function distance( p1, p2 ) {
var dx = p2[0] - p1[0],
dy = p2[1] - p1[1];
return Math.abs(
dx === 0 ? dy :
dy === 0 ? dx :
Math.sqrt( dx * dx + dy * dy )
);
}
// Find the start and end points of the gradient
if( startPos ) {
startPos = startPos.coords( el, w, h );
startX = startPos.x;
startY = startPos.y;
}
if( angle ) {
angle = angle.degrees();
normalizeAngle();
findCorners();
// If no start position was specified, then choose a corner as the starting point.
if( !startPos ) {
startX = startCornerX;
startY = startCornerY;
}
// Find the end position by extending a perpendicular line from the gradient-line which
// intersects the corner opposite from the starting corner.
p = perpendicularIntersect( startX, startY, angle, endCornerX, endCornerY );
endX = p[0];
endY = p[1];
}
else if( startPos ) {
// Start position but no angle specified: find the end point by rotating 180deg around the center
endX = w - startX;
endY = h - startY;
}
else {
// Neither position nor angle specified; create vertical gradient from top to bottom
startX = startY = endX = 0;
endY = h;
}
deltaX = endX - startX;
deltaY = endY - startY;
if( angle === undefined ) {
angle = -Math.atan2( deltaY, deltaX ) / PI * 180;
normalizeAngle();
findCorners();
}
// In VML land, the angle of the rendered gradient depends on the aspect ratio of the shape's
// bounding box; for example specifying a 45 deg angle actually results in a gradient
// drawn diagonally from one corner to its opposite corner, which will only appear to the
// viewer as 45 degrees if the shape is equilateral. We adjust for this by taking the x/y deltas
// between the start and end points, multiply one of them by the shape's aspect ratio,
// and get their arctangent, resulting in an appropriate VML angle.
vmlAngle = Math.atan2( deltaX * w / h, deltaY ) / PI * 180;
// VML angles are 180 degrees offset from CSS angles
vmlAngle += 180;
vmlAngle = vmlAngle % 360;
// Add all the stops to the VML 'colors' list, including the first and last stops.
// For each, we find its pixel offset along the gradient-line; if the offset of a stop is less
// than that of its predecessor we increase it to be equal. We then map that pixel offset to a
// percentage along the VML gradient-line, which runs from shape corner to corner.
lineLength = distance( [ startX, startY ], [ endX, endY ] );
vmlGradientLength = distance( [ startCornerX, startCornerY ], perpendicularIntersect( startCornerX, startCornerY, angle, endCornerX, endCornerY ) );
vmlColors = [];
vmlOffsetPct = distance( [ startX, startY ], perpendicularIntersect( startX, startY, angle, startCornerX, startCornerY ) ) / vmlGradientLength * 100;
// Find the pixel offsets along the CSS3 gradient-line for each stop.
stopPx = [];
for( i = 0; i < stopCount; i++ ) {
stopPx.push( stops[i].offset ? stops[i].offset.pixels( el, lineLength ) :
i === 0 ? 0 : i === stopCount - 1 ? lineLength : null );
}
// Fill in gaps with evenly-spaced offsets
for( i = 1; i < stopCount; i++ ) {
if( stopPx[ i ] === null ) {
before = stopPx[ i - 1 ];
j = i;
do {
after = stopPx[ ++j ];
} while( after === null );
stopPx[ i ] = before + ( after - before ) / ( j - i + 1 );
}
// Make sure each stop's offset is no less than the one before it
stopPx[ i ] = Math.max( stopPx[ i ], stopPx[ i - 1 ] );
}
// Convert to percentage along the VML gradient line and add to the VML 'colors' value
for( i = 0; i < stopCount; i++ ) {
vmlColors.push(
( vmlOffsetPct + ( stopPx[ i ] / vmlGradientLength * 100 ) ) + '% ' + stops[i].color.value( el )
);
}
// Now, finally, we're ready to render the gradient fill. Set the start and end colors to
// the first and last stop colors; this just sets outer bounds for the gradient.
fill['angle'] = vmlAngle;
fill['type'] = 'gradient';
fill['method'] = 'sigma';
fill['color'] = stops[0].color.value( el );
fill['color2'] = stops[stopCount - 1].color.value( el );
fill['colors'].value = vmlColors.join( ',' );
},
/**
* Hide the actual background image and color of the element.
*/
hideBackground: function() {
var rs = this.element.runtimeStyle;
rs.backgroundImage = 'url(about:blank)'; //ensures the background area reacts to mouse events
rs.backgroundColor = 'transparent';
},
destroy: function() {
PIE.RendererBase.destroy.call( this );
var rs = this.element.runtimeStyle;
rs.backgroundImage = rs.backgroundColor = '';
}
} );
/**
* Renderer for element borders.
* @constructor
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
* @param {PIE.RootRenderer} parent
*/
PIE.BorderRenderer = PIE.RendererBase.newRenderer( {
zIndex: 4,
boxName: 'border',
needsUpdate: function() {
var si = this.styleInfos;
return si.borderInfo.changed() || si.borderRadiusInfo.changed();
},
isActive: function() {
var si = this.styleInfos;
return si.borderImageInfo.isActive() ||
si.borderRadiusInfo.isActive() ||
si.backgroundInfo.isActive();
},
updateSize: function() {
if( this.isActive() ) {
this.drawBorder();
}
},
updateProps: function() {
this.destroy();
if( this.isActive() ) {
this.drawBorder();
}
},
/**
* Draw the border shape(s)
*/
drawBorder: function() {
var el = this.element,
cs = el.currentStyle,
w = el.offsetWidth,
h = el.offsetHeight,
props = this.styleInfos.borderInfo.getProps(),
side, shape, stroke, bColor, bWidth, bStyle, s,
segments, seg, i, len;
if( props ) {
this.hideBorder();
segments = this.getBorderSegments( 2 );
for( i = 0, len = segments.length; i < len; i++) {
seg = segments[i];
shape = this.getShape( 'borderPiece' + i, seg.stroke ? 'stroke' : 'fill', this.getBox() );
shape.coordsize = w * 2 + ',' + h * 2;
shape.coordorigin = '1,1';
shape.path = seg.path;
s = shape.style;
s.width = w;
s.height = h;
shape.filled = !!seg.fill;
shape.stroked = !!seg.stroke;
if( seg.stroke ) {
stroke = shape.stroke;
stroke['weight'] = seg.weight + 'px';
stroke.color = seg.color.value( el );
stroke['dashstyle'] = seg.stroke === 'dashed' ? '2 2' : seg.stroke === 'dotted' ? '1 1' : 'solid';
stroke['linestyle'] = seg.stroke === 'double' && seg.weight > 2 ? 'ThinThin' : 'Single';
} else {
shape.fill.color = seg.fill.value( el );
}
}
// remove any previously-created border shapes which didn't get used above
while( this.deleteShape( 'borderPiece' + i++ ) ) {}
}
},
/**
* Hide the actual border of the element. In IE7 and up we can just set its color to transparent;
* however IE6 does not support transparent borders so we have to get tricky with it. Also, some elements
* like form buttons require removing the border width altogether, so for those we increase the padding
* by the border size.
*/
hideBorder: function() {
var el = this.element,
cs = el.currentStyle,
rs = el.runtimeStyle,
tag = el.tagName,
sides, side, i;
if( tag === 'BUTTON' || ( tag === 'INPUT' && el.type in { 'submit':1, 'button':1, 'reset':1 } ) ) {
rs.borderWidth = '';
sides = this.styleInfos.borderInfo.sides;
for( i = sides.length; i--; ) {
side = sides[ i ];
rs[ 'padding' + side ] = '';
rs[ 'padding' + side ] = parseInt( cs[ 'padding' + side ] ) +
parseInt( cs[ 'border' + side + 'Width' ] ) +
( !PIE.isIE8 && i % 2 ? 1 : 0 ); //needs an extra horizontal pixel to counteract the extra "inner border" going away
}
rs.borderWidth = 0;
}
else if( PIE.isIE6 ) {
// Wrap all the element's children in a custom element, set the element to visiblity:hidden,
// and set the wrapper element to visiblity:visible. This hides the outer element's decorations
// (background and border) but displays all the contents.
// TODO find a better way to do this that doesn't mess up the DOM parent-child relationship,
// as this can interfere with other author scripts which add/modify/delete children. Also, this
// won't work for elements which cannot take children, e.g. input/button/textarea/img/etc. Look into
// using a compositor filter or some other filter which masks the border.
if( el.childNodes.length !== 1 || el.firstChild.tagName !== 'ie6-mask' ) {
var cont = el.document.createElement( 'ie6-mask' ),
s = cont.style, child;
s.visibility = 'visible';
s.zoom = 1;
while( child = el.firstChild ) {
cont.appendChild( child );
}
el.appendChild( cont );
rs.visibility = 'hidden';
}
}
else {
rs.borderColor = 'transparent';
}
},
/**
* Get the VML path definitions for the border segment(s).
* @param {number=} mult If specified, all coordinates will be multiplied by this number
* @return {Array.<string>}
*/
getBorderSegments: function( mult ) {
var el = this.element,
elW, elH,
borderInfo = this.styleInfos.borderInfo,
segments = [],
floor, ceil, wT, wR, wB, wL,
borderProps, radiusInfo, radii, widths, styles, colors;
if( borderInfo.isActive() ) {
borderProps = borderInfo.getProps();
widths = borderProps.widths;
styles = borderProps.styles;
colors = borderProps.colors;
if( borderProps.widthsSame && borderProps.stylesSame && borderProps.colorsSame ) {
// shortcut for identical border on all sides - only need 1 stroked shape
wT = widths['t'].pixels( el ); //thickness
wR = wT / 2; //shrink
segments.push( {
path: this.getBoxPath( { t: wR, r: wR, b: wR, l: wR }, mult ),
stroke: styles['t'],
color: colors['t'],
weight: wT
} );
}
else {
mult = mult || 1;
elW = el.offsetWidth;
elH = el.offsetHeight;
wT = widths['t'].pixels( el );
wR = widths['r'].pixels( el );
wB = widths['b'].pixels( el );
wL = widths['l'].pixels( el );
var pxWidths = {
't': wT,
'r': wR,
'b': wB,
'l': wL
};
radiusInfo = this.styleInfos.borderRadiusInfo;
if( radiusInfo.isActive() ) {
radii = this.getRadiiPixels( radiusInfo.getProps() );
}
floor = Math.floor;
ceil = Math.ceil;
function radius( xy, corner ) {
return radii ? radii[ xy ][ corner ] : 0;
}
function curve( corner, shrinkX, shrinkY, startAngle, ccw, doMove ) {
var rx = radius( 'x', corner),
ry = radius( 'y', corner),
deg = 65535,
isRight = corner.charAt( 1 ) === 'r',
isBottom = corner.charAt( 0 ) === 'b';
return ( rx > 0 && ry > 0 ) ?
( doMove ? 'al' : 'ae' ) +
( isRight ? ceil( elW - rx ) : floor( rx ) ) * mult + ',' + // center x
( isBottom ? ceil( elH - ry ) : floor( ry ) ) * mult + ',' + // center y
( floor( rx ) - shrinkX ) * mult + ',' + // width
( floor( ry ) - shrinkY ) * mult + ',' + // height
( startAngle * deg ) + ',' + // start angle
( 45 * deg * ( ccw ? 1 : -1 ) // angle change
) : (
( doMove ? 'm' : 'l' ) +
( isRight ? elW - shrinkX : shrinkX ) * mult + ',' +
( isBottom ? elH - shrinkY : shrinkY ) * mult
);
}
function line( side, shrink, ccw, doMove ) {
var
start = (
side === 't' ?
floor( radius( 'x', 'tl') ) * mult + ',' + ceil( shrink ) * mult :
side === 'r' ?
ceil( elW - shrink ) * mult + ',' + floor( radius( 'y', 'tr') ) * mult :
side === 'b' ?
ceil( elW - radius( 'x', 'br') ) * mult + ',' + floor( elH - shrink ) * mult :
// side === 'l' ?
floor( shrink ) * mult + ',' + ceil( elH - radius( 'y', 'bl') ) * mult
),
end = (
side === 't' ?
ceil( elW - radius( 'x', 'tr') ) * mult + ',' + ceil( shrink ) * mult :
side === 'r' ?
ceil( elW - shrink ) * mult + ',' + ceil( elH - radius( 'y', 'br') ) * mult :
side === 'b' ?
floor( radius( 'x', 'bl') ) * mult + ',' + floor( elH - shrink ) * mult :
// side === 'l' ?
floor( shrink ) * mult + ',' + floor( radius( 'y', 'tl') ) * mult
);
return ccw ? ( doMove ? 'm' + end : '' ) + 'l' + start :
( doMove ? 'm' + start : '' ) + 'l' + end;
}
function addSide( side, sideBefore, sideAfter, cornerBefore, cornerAfter, baseAngle ) {
var vert = side === 'l' || side === 'r',
sideW = pxWidths[ side ],
beforeX, beforeY, afterX, afterY;
if( sideW > 0 && styles[ side ] !== 'none' ) {
beforeX = pxWidths[ vert ? side : sideBefore ];
beforeY = pxWidths[ vert ? sideBefore : side ];
afterX = pxWidths[ vert ? side : sideAfter ];
afterY = pxWidths[ vert ? sideAfter : side ];
if( styles[ side ] === 'dashed' || styles[ side ] === 'dotted' ) {
segments.push( {
path: curve( cornerBefore, beforeX, beforeY, baseAngle + 45, 0, 1 ) +
curve( cornerBefore, 0, 0, baseAngle, 1, 0 ),
fill: colors[ side ]
} );
segments.push( {
path: line( side, sideW / 2, 0, 1 ),
stroke: styles[ side ],
weight: sideW,
color: colors[ side ]
} );
segments.push( {
path: curve( cornerAfter, afterX, afterY, baseAngle, 0, 1 ) +
curve( cornerAfter, 0, 0, baseAngle - 45, 1, 0 ),
fill: colors[ side ]
} );
}
else {
segments.push( {
path: curve( cornerBefore, beforeX, beforeY, baseAngle + 45, 0, 1 ) +
line( side, sideW, 0, 0 ) +
curve( cornerAfter, afterX, afterY, baseAngle, 0, 0 ) +
( styles[ side ] === 'double' && sideW > 2 ?
curve( cornerAfter, afterX - floor( afterX / 3 ), afterY - floor( afterY / 3 ), baseAngle - 45, 1, 0 ) +
line( side, ceil( sideW / 3 * 2 ), 1, 0 ) +
curve( cornerBefore, beforeX - floor( beforeX / 3 ), beforeY - floor( beforeY / 3 ), baseAngle, 1, 0 ) +
'x ' +
curve( cornerBefore, floor( beforeX / 3 ), floor( beforeY / 3 ), baseAngle + 45, 0, 1 ) +
line( side, floor( sideW / 3 ), 1, 0 ) +
curve( cornerAfter, floor( afterX / 3 ), floor( afterY / 3 ), baseAngle, 0, 0 )
: '' ) +
curve( cornerAfter, 0, 0, baseAngle - 45, 1, 0 ) +
line( side, 0, 1, 0 ) +
curve( cornerBefore, 0, 0, baseAngle, 1, 0 ),
fill: colors[ side ]
} );
}
}
}
addSide( 't', 'l', 'r', 'tl', 'tr', 90 );
addSide( 'r', 't', 'b', 'tr', 'br', 0 );
addSide( 'b', 'r', 'l', 'br', 'bl', -90 );
addSide( 'l', 'b', 't', 'bl', 'tl', -180 );
}
}
return segments;
},
destroy: function() {
PIE.RendererBase.destroy.call( this );
this.element.runtimeStyle.borderColor = '';
}
} );
/**
* Renderer for border-image
* @constructor
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
* @param {PIE.RootRenderer} parent
*/
PIE.BorderImageRenderer = PIE.RendererBase.newRenderer( {
zIndex: 5,
pieceNames: [ 't', 'tr', 'r', 'br', 'b', 'bl', 'l', 'tl', 'c' ],
needsUpdate: function() {
var si = this.styleInfos;
return si.borderImageInfo.changed() || si.borderImageInfo.changed();
},
isActive: function() {
return this.styleInfos.borderImageInfo.isActive();
},
updateSize: function() {
if( this.isActive() ) {
var props = this.styleInfos.borderImageInfo.getProps(),
box = this.getBox(), //make sure pieces are created
el = this.element,
pieces = this.pieces;
PIE.Util.withImageSize( props.src, function( imgSize ) {
var elW = el.offsetWidth,
elH = el.offsetHeight,
widths = props.width,
widthT = widths.t.pixels( el ),
widthR = widths.r.pixels( el ),
widthB = widths.b.pixels( el ),
widthL = widths.l.pixels( el ),
slices = props.slice,
sliceT = slices.t.pixels( el ),
sliceR = slices.r.pixels( el ),
sliceB = slices.b.pixels( el ),
sliceL = slices.l.pixels( el );
// Piece positions and sizes
function setSizeAndPos( piece, w, h, x, y ) {
var s = pieces[piece].style;
s.width = w;
s.height = h;
s.left = x;
s.top = y;
}
setSizeAndPos( 'tl', widthL, widthT, 0, 0 );
setSizeAndPos( 't', elW - widthL - widthR, widthT, widthL, 0 );
setSizeAndPos( 'tr', widthR, widthT, elW - widthR, 0 );
setSizeAndPos( 'r', widthR, elH - widthT - widthB, elW - widthR, widthT );
setSizeAndPos( 'br', widthR, widthB, elW - widthR, elH - widthB );
setSizeAndPos( 'b', elW - widthL - widthR, widthB, widthL, elH - widthB );
setSizeAndPos( 'bl', widthL, widthB, 0, elH - widthB );
setSizeAndPos( 'l', widthL, elH - widthT - widthB, 0, widthT );
setSizeAndPos( 'c', elW - widthL - widthR, elH - widthT - widthB, widthL, widthT );
// image croppings
function setCrops( sides, crop, val ) {
for( var i=0, len=sides.length; i < len; i++ ) {
pieces[ sides[i] ]['imagedata'][ crop ] = val;
}
}
// corners
setCrops( [ 'tl', 't', 'tr' ], 'cropBottom', ( imgSize.h - sliceT ) / imgSize.h );
setCrops( [ 'tl', 'l', 'bl' ], 'cropRight', ( imgSize.w - sliceL ) / imgSize.w );
setCrops( [ 'bl', 'b', 'br' ], 'cropTop', ( imgSize.h - sliceB ) / imgSize.h );
setCrops( [ 'tr', 'r', 'br' ], 'cropLeft', ( imgSize.w - sliceR ) / imgSize.w );
// edges and center
if( props.repeat.v === 'stretch' ) {
setCrops( [ 'l', 'r', 'c' ], 'cropTop', sliceT / imgSize.h );
setCrops( [ 'l', 'r', 'c' ], 'cropBottom', sliceB / imgSize.h );
}
if( props.repeat.h === 'stretch' ) {
setCrops( [ 't', 'b', 'c' ], 'cropLeft', sliceL / imgSize.w );
setCrops( [ 't', 'b', 'c' ], 'cropRight', sliceR / imgSize.w );
}
// center fill
pieces['c'].style.display = props.fill ? '' : 'none';
}, this );
} else {
this.destroy();
}
},
updateProps: function() {
this.destroy();
if( this.isActive() ) {
this.updateSize();
}
},
getBox: function() {
var box = this._box, s, piece, i,
pieceNames = this.pieceNames,
len = pieceNames.length;
if( !box ) {
box = this._box = this.element.document.createElement( 'border-image' );
s = box.style;
s.position = 'absolute';
this.pieces = {};
for( i = 0; i < len; i++ ) {
piece = this.pieces[ pieceNames[i] ] = PIE.Util.createVmlElement( 'rect' );
piece.appendChild( PIE.Util.createVmlElement( 'imagedata' ) );
s = piece.style;
s['behavior'] = 'url(#default#VML)';
s.position = "absolute";
s.top = s.left = 0;
piece['imagedata'].src = this.styleInfos.borderImageInfo.getProps().src;
piece.stroked = false;
piece.filled = false;
box.appendChild( piece );
}
this.parent.addLayer( this.zIndex, box )
}
return box;
}
} );
/**
* Renderer for outset box-shadows
* @constructor
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
* @param {PIE.RootRenderer} parent
*/
PIE.BoxShadowOutsetRenderer = PIE.RendererBase.newRenderer( {
zIndex: 1,
boxName: 'outset-box-shadow',
needsUpdate: function() {
var si = this.styleInfos;
return si.boxShadowInfo.changed() || si.borderRadiusInfo.changed();
},
isActive: function() {
var boxShadowInfo = this.styleInfos.boxShadowInfo;
return boxShadowInfo.isActive() && boxShadowInfo.getProps().outset[0];
},
updateSize: function() {
if( this.isActive() ) {
var me = this,
el = this.element,
box = this.getBox(),
styleInfos = this.styleInfos,
shadowInfos = styleInfos.boxShadowInfo.getProps().outset,
radii = styleInfos.borderRadiusInfo.getProps(),
len = shadowInfos.length,
i = len, j,
w = el.offsetWidth,
h = el.offsetHeight,
clipAdjust = PIE.isIE8 ? 1 : 0, //workaround for IE8 bug where VML leaks out top/left of clip region by 1px
corners = [ 'tl', 'tr', 'br', 'bl' ], corner,
shadowInfo, shape, fill, ss, xOff, yOff, spread, blur, shrink, color, alpha, path,
totalW, totalH, focusX, focusY, isBottom, isRight;
function getShadowShape( index, corner, xOff, yOff, color, blur, path ) {
var shape = me.getShape( 'shadow' + index + corner, 'fill', box, len - index ),
ss = shape.style,
fill = shape.fill;
// Position and size
ss.left = xOff;
ss.top = yOff;
shape['coordsize'] = w * 2 + ',' + h * 2;
shape['coordorigin'] = '1,1';
// Color and opacity
shape['stroked'] = false;
shape['filled'] = true;
fill.color = color.value( el );
if( blur ) {
fill['type'] = 'gradienttitle'; //makes the VML gradient follow the shape's outline - hooray for undocumented features?!?!
fill['color2'] = fill.color;
fill['opacity'] = 0;
}
// Path
shape.path = path;
// This needs to go last for some reason, to prevent rendering at incorrect size
ss.width = w;
ss.height = h;
return shape;
}
while( i-- ) {
shadowInfo = shadowInfos[ i ];
xOff = shadowInfo.xOffset.pixels( el );
yOff = shadowInfo.yOffset.pixels( el );
spread = shadowInfo.spread.pixels( el ),
blur = shadowInfo.blur.pixels( el );
color = shadowInfo.color;
// Shape path
shrink = -spread - blur;
if( !radii && blur ) {
// If blurring, use a non-null border radius info object so that getBoxPath will
// round the corners of the expanded shadow shape rather than squaring them off.
radii = PIE.BorderRadiusStyleInfo.ALL_ZERO;
}
path = this.getBoxPath( { t: shrink, r: shrink, b: shrink, l: shrink }, 2, radii );
if( blur ) {
totalW = ( spread + blur ) * 2 + w;
totalH = ( spread + blur ) * 2 + h;
focusX = blur * 2 / totalW;
focusY = blur * 2 / totalH;
if( blur - spread > w / 2 || blur - spread > h / 2 ) {
// If the blur is larger than half the element's narrowest dimension, we cannot do
// this with a single shape gradient, because its focussize would have to be less than
// zero which results in ugly artifacts. Instead we create four shapes, each with its
// gradient focus past center, and then clip them so each only shows the quadrant
// opposite the focus.
for( j = 4; j--; ) {
corner = corners[j];
isBottom = corner.charAt( 0 ) === 'b';
isRight = corner.charAt( 1 ) === 'r';
shape = getShadowShape( i, corner, xOff, yOff, color, blur, path );
fill = shape.fill;
fill['focusposition'] = ( isRight ? 1 - focusX : focusX ) + ',' +
( isBottom ? 1 - focusY : focusY );
fill['focussize'] = '0,0';
// Clip to show only the appropriate quadrant. Add 1px to the top/left clip values
// in IE8 to prevent a bug where IE8 displays one pixel outside the clip region.
shape.style.clip = 'rect(' + ( ( isBottom ? totalH / 2 : 0 ) + clipAdjust ) + 'px,' +
( isRight ? totalW : totalW / 2 ) + 'px,' +
( isBottom ? totalH : totalH / 2 ) + 'px,' +
( ( isRight ? totalW / 2 : 0 ) + clipAdjust ) + 'px)';
}
} else {
// TODO delete old quadrant shapes if resizing expands past the barrier
shape = getShadowShape( i, '', xOff, yOff, color, blur, path );
fill = shape.fill;
fill['focusposition'] = focusX + ',' + focusY;
fill['focussize'] = ( 1 - focusX * 2 ) + ',' + ( 1 - focusY * 2 );
}
} else {
shape = getShadowShape( i, '', xOff, yOff, color, blur, path );
alpha = color.alpha();
if( alpha < 1 ) {
// shape.style.filter = 'alpha(opacity=' + ( alpha * 100 ) + ')';
// ss.filter = 'progid:DXImageTransform.Microsoft.BasicImage(opacity=' + ( alpha ) + ')';
shape.fill.opacity = alpha;
}
}
}
} else {
this.destroy();
}
},
updateProps: function() {
this.destroy();
this.updateSize();
}
} );
/**
* Renderer for inset box-shadows
* @constructor
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
* @param {PIE.RootRenderer} parent
*/
PIE.BoxShadowInsetRenderer = PIE.RendererBase.newRenderer( {
zIndex: 3,
boxName: 'inset-box-shadow',
needsUpdate: function() {
var si = this.styleInfos;
return si.boxShadowInfo.changed() || si.borderRadiusInfo.changed();
},
isActive: function() {
var boxShadowInfo = this.styleInfos.boxShadowInfo;
return boxShadowInfo.isActive() && boxShadowInfo.getProps().inset[0];
},
updateSize: function() {
// TODO
},
updateProps: function() {
// TODO
}
} );
} // if( !PIE )
var lastW, lastH, lastX, lastY,
renderers,
styleInfos,
ancestors;
/**
* Update position and/or size as necessary. Both move and resize events call
* this rather than the updatePos/Size functions because sometimes, particularly
* during page load, one will fire but the other won't.
*/
function update() {
init();
/* TODO just using getBoundingClientRect may not always be accurate; it's possible that
an element will actually move relative to its positioning parent, but its position
relative to the viewport will stay the same. Need to come up with a better way to
track movement. The most accurate would be the same logic used in RootRenderer.updatePos()
but that is a more expensive operation since it does some DOM walking, and we want this
check to be as fast as possible. */
var rect = element.getBoundingClientRect(),
x = rect.left,
y = rect.top,
w = rect.right - x,
h = rect.bottom - y,
i, len;
if( x !== lastX || y !== lastY ) {
for( i = 0, len = renderers.length; i < len; i++ ) {
renderers[i].updatePos();
}
lastX = x;
lastY = y;
}
if( w !== lastW || h !== lastH ) {
for( i = 0, len = renderers.length; i < len; i++ ) {
renderers[i].updateSize();
}
lastW = w;
lastH = h;
}
}
/**
* Handle property changes to trigger update when appropriate.
*/
function propChanged() {
init();
var i, len,
toUpdate = [];
for( i = 0, len = renderers.length; i < len; i++ ) {
if( renderers[i].needsUpdate() ) {
toUpdate.push( renderers[i] );
}
}
for( i = 0, len = toUpdate.length; i < len; i++ ) {
toUpdate[i].updateProps();
}
}
/**
* Handle mouseenter events. Adds a custom class to the element to allow IE6 to add
* hover styles to non-link elements.
*/
function mouseEntered() {
var el = event.srcElement;
el.className += ' ' + PIE.CLASS_PREFIX + 'hover';
//must delay this because the mouseleave event fires before the :hover styles are added.
setTimeout( propChanged, 0 );
}
/**
* Handle mouseleave events
*/
function mouseLeft() {
var el = event.srcElement;
el.className = el.className.replace( new RegExp( '\\b' + PIE.CLASS_PREFIX + 'hover\\b', 'g' ), '' );
//must delay this because the mouseleave event fires before the :hover styles are removed.
setTimeout( propChanged, 0 );
}
/**
* Handle property changes on ancestors of the element; see initAncestorPropChangeListeners()
* which adds these listeners as requested with the -pie-watch-ancestors CSS property.
*/
function ancestorPropChanged() {
var name = event.propertyName;
if( name === 'className' || name === 'id' ) {
propChanged();
}
}
/**
* Clean everything up when the behavior is removed from the element, or the element
* is destroyed.
*/
function cleanup() {
var i, len;
// destroy any active renderers
if( renderers ) {
for( i = 0, len = renderers.length; i < len; i++ ) {
renderers[i].destroy();
}
renderers = null;
}
styleInfos = null;
// remove any ancestor propertychange listeners
if( ancestors ) {
for( i = 0, len = ancestors.length; i < len; i++ ) {
ancestors[i].detachEvent( 'onpropertychange', ancestorPropChanged );
ancestors[i].detachEvent( 'onmouseenter', mouseEntered );
ancestors[i].detachEvent( 'onmouseleave', mouseLeft );
}
ancestors = null;
}
// Add to list of polled elements in IE8
if( PIE.ie8DocMode === 8 ) {
PIE.ie8Poller.remove( update );
}
}
/**
* If requested via the custom -pie-watch-ancestors CSS property, add onpropertychange listeners
* to ancestor(s) of the element so we can pick up style changes based on CSS rules using
* descendant selectors.
*/
function initAncestorPropChangeListeners() {
var el = element,
watch = el.currentStyle.getAttribute( PIE.CSS_PREFIX + 'watch-ancestors' ),
i, a;
if( watch ) {
ancestors = [];
watch = parseInt( watch, 10 );
i = 0;
a = el.parentNode;
while( a && ( watch === 'NaN' || i++ < watch ) ) {
ancestors.push( a );
a.attachEvent( 'onpropertychange', ancestorPropChanged );
a.attachEvent( 'onmouseenter', mouseEntered );
a.attachEvent( 'onmouseleave', mouseLeft );
a = a.parentNode;
}
}
}
/**
* Initialize PIE for this element.
*/
function init() {
if( !renderers ) {
var el = element;
// force layout so move/resize events will fire
el.runtimeStyle.zoom = 1;
// Create the style infos and renderers
styleInfos = {
backgroundInfo: new PIE.BackgroundStyleInfo( el ),
borderInfo: new PIE.BorderStyleInfo( el ),
borderImageInfo: new PIE.BorderImageStyleInfo( el ),
borderRadiusInfo: new PIE.BorderRadiusStyleInfo( el ),
boxShadowInfo: new PIE.BoxShadowStyleInfo( el ),
visibilityInfo: new PIE.VisibilityStyleInfo( el )
};
var rootRenderer = new PIE.RootRenderer( el, styleInfos );
renderers = [
rootRenderer,
new PIE.BoxShadowOutsetRenderer( el, styleInfos, rootRenderer ),
new PIE.BackgroundRenderer( el, styleInfos, rootRenderer ),
new PIE.BoxShadowInsetRenderer( el, styleInfos, rootRenderer ),
new PIE.BorderRenderer( el, styleInfos, rootRenderer ),
new PIE.BorderImageRenderer( el, styleInfos, rootRenderer )
];
// Add property change listeners to ancestors if requested
initAncestorPropChangeListeners();
// Add to list of polled elements in IE8
if( PIE.ie8DocMode === 8 ) {
PIE.ie8Poller.add( update );
}
}
}
if( element.readyState === 'complete' ) {
update();
}
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