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/*! | |
* Farbtastic: jQuery color picker plug-in v1.3u | |
* https://github.com/mattfarina/farbtastic | |
* | |
* Licensed under the GPL license: | |
* http://www.gnu.org/licenses/gpl.html | |
*/ | |
/** | |
* Modified for WordPress: replaced deprecated jQuery methods. | |
* See https://core.trac.wordpress.org/ticket/57946. | |
*/ | |
(function($) { | |
$.fn.farbtastic = function (options) { | |
$.farbtastic(this, options); | |
return this; | |
}; | |
$.farbtastic = function (container, callback) { | |
var container = $(container).get(0); | |
return container.farbtastic || (container.farbtastic = new $._farbtastic(container, callback)); | |
}; | |
$._farbtastic = function (container, callback) { | |
// Store farbtastic object | |
var fb = this; | |
// Insert markup | |
$(container).html('<div class="farbtastic"><div class="color"></div><div class="wheel"></div><div class="overlay"></div><div class="h-marker marker"></div><div class="sl-marker marker"></div></div>'); | |
var e = $('.farbtastic', container); | |
fb.wheel = $('.wheel', container).get(0); | |
// Dimensions | |
fb.radius = 84; | |
fb.square = 100; | |
fb.width = 194; | |
// Fix background PNGs in IE6 | |
if (navigator.appVersion.match(/MSIE [0-6]\./)) { | |
$('*', e).each(function () { | |
if (this.currentStyle.backgroundImage != 'none') { | |
var image = this.currentStyle.backgroundImage; | |
image = this.currentStyle.backgroundImage.substring(5, image.length - 2); | |
$(this).css({ | |
'backgroundImage': 'none', | |
'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')" | |
}); | |
} | |
}); | |
} | |
/** | |
* Link to the given element(s) or callback. | |
*/ | |
fb.linkTo = function (callback) { | |
// Unbind previous nodes | |
if (typeof fb.callback == 'object') { | |
$(fb.callback).off('keyup', fb.updateValue); | |
} | |
// Reset color | |
fb.color = null; | |
// Bind callback or elements | |
if (typeof callback == 'function') { | |
fb.callback = callback; | |
} | |
else if (typeof callback == 'object' || typeof callback == 'string') { | |
fb.callback = $(callback); | |
fb.callback.on('keyup', fb.updateValue); | |
if (fb.callback.get(0).value) { | |
fb.setColor(fb.callback.get(0).value); | |
} | |
} | |
return this; | |
}; | |
fb.updateValue = function (event) { | |
if (this.value && this.value != fb.color) { | |
fb.setColor(this.value); | |
} | |
}; | |
/** | |
* Change color with HTML syntax #123456 | |
*/ | |
fb.setColor = function (color) { | |
var unpack = fb.unpack(color); | |
if (fb.color != color && unpack) { | |
fb.color = color; | |
fb.rgb = unpack; | |
fb.hsl = fb.RGBToHSL(fb.rgb); | |
fb.updateDisplay(); | |
} | |
return this; | |
}; | |
/** | |
* Change color with HSL triplet [0..1, 0..1, 0..1] | |
*/ | |
fb.setHSL = function (hsl) { | |
fb.hsl = hsl; | |
fb.rgb = fb.HSLToRGB(hsl); | |
fb.color = fb.pack(fb.rgb); | |
fb.updateDisplay(); | |
return this; | |
}; | |
///////////////////////////////////////////////////// | |
/** | |
* Retrieve the coordinates of the given event relative to the center | |
* of the widget. | |
*/ | |
fb.widgetCoords = function (event) { | |
var offset = $(fb.wheel).offset(); | |
return { x: (event.pageX - offset.left) - fb.width / 2, y: (event.pageY - offset.top) - fb.width / 2 }; | |
}; | |
/** | |
* Mousedown handler | |
*/ | |
fb.mousedown = function (event) { | |
// Capture mouse | |
if (!document.dragging) { | |
$(document).on('mousemove', fb.mousemove).on('mouseup', fb.mouseup); | |
document.dragging = true; | |
} | |
// Check which area is being dragged | |
var pos = fb.widgetCoords(event); | |
fb.circleDrag = Math.max(Math.abs(pos.x), Math.abs(pos.y)) * 2 > fb.square; | |
// Process | |
fb.mousemove(event); | |
return false; | |
}; | |
/** | |
* Mousemove handler | |
*/ | |
fb.mousemove = function (event) { | |
// Get coordinates relative to color picker center | |
var pos = fb.widgetCoords(event); | |
// Set new HSL parameters | |
if (fb.circleDrag) { | |
var hue = Math.atan2(pos.x, -pos.y) / 6.28; | |
if (hue < 0) hue += 1; | |
fb.setHSL([hue, fb.hsl[1], fb.hsl[2]]); | |
} | |
else { | |
var sat = Math.max(0, Math.min(1, -(pos.x / fb.square) + .5)); | |
var lum = Math.max(0, Math.min(1, -(pos.y / fb.square) + .5)); | |
fb.setHSL([fb.hsl[0], sat, lum]); | |
} | |
return false; | |
}; | |
/** | |
* Mouseup handler | |
*/ | |
fb.mouseup = function () { | |
// Uncapture mouse | |
$(document).off('mousemove', fb.mousemove); | |
$(document).off('mouseup', fb.mouseup); | |
document.dragging = false; | |
}; | |
/** | |
* Update the markers and styles | |
*/ | |
fb.updateDisplay = function () { | |
// Markers | |
var angle = fb.hsl[0] * 6.28; | |
$('.h-marker', e).css({ | |
left: Math.round(Math.sin(angle) * fb.radius + fb.width / 2) + 'px', | |
top: Math.round(-Math.cos(angle) * fb.radius + fb.width / 2) + 'px' | |
}); | |
$('.sl-marker', e).css({ | |
left: Math.round(fb.square * (.5 - fb.hsl[1]) + fb.width / 2) + 'px', | |
top: Math.round(fb.square * (.5 - fb.hsl[2]) + fb.width / 2) + 'px' | |
}); | |
// Saturation/Luminance gradient | |
$('.color', e).css('backgroundColor', fb.pack(fb.HSLToRGB([fb.hsl[0], 1, 0.5]))); | |
// Linked elements or callback | |
if (typeof fb.callback == 'object') { | |
// Set background/foreground color | |
$(fb.callback).css({ | |
backgroundColor: fb.color, | |
color: fb.hsl[2] > 0.5 ? '#000' : '#fff' | |
}); | |
// Change linked value | |
$(fb.callback).each(function() { | |
if (this.value && this.value != fb.color) { | |
this.value = fb.color; | |
} | |
}); | |
} | |
else if (typeof fb.callback == 'function') { | |
fb.callback.call(fb, fb.color); | |
} | |
}; | |
/* Various color utility functions */ | |
fb.pack = function (rgb) { | |
var r = Math.round(rgb[0] * 255); | |
var g = Math.round(rgb[1] * 255); | |
var b = Math.round(rgb[2] * 255); | |
return '#' + (r < 16 ? '0' : '') + r.toString(16) + | |
(g < 16 ? '0' : '') + g.toString(16) + | |
(b < 16 ? '0' : '') + b.toString(16); | |
}; | |
fb.unpack = function (color) { | |
if (color.length == 7) { | |
return [parseInt('0x' + color.substring(1, 3)) / 255, | |
parseInt('0x' + color.substring(3, 5)) / 255, | |
parseInt('0x' + color.substring(5, 7)) / 255]; | |
} | |
else if (color.length == 4) { | |
return [parseInt('0x' + color.substring(1, 2)) / 15, | |
parseInt('0x' + color.substring(2, 3)) / 15, | |
parseInt('0x' + color.substring(3, 4)) / 15]; | |
} | |
}; | |
fb.HSLToRGB = function (hsl) { | |
var m1, m2, r, g, b; | |
var h = hsl[0], s = hsl[1], l = hsl[2]; | |
m2 = (l <= 0.5) ? l * (s + 1) : l + s - l*s; | |
m1 = l * 2 - m2; | |
return [this.hueToRGB(m1, m2, h+0.33333), | |
this.hueToRGB(m1, m2, h), | |
this.hueToRGB(m1, m2, h-0.33333)]; | |
}; | |
fb.hueToRGB = function (m1, m2, h) { | |
h = (h < 0) ? h + 1 : ((h > 1) ? h - 1 : h); | |
if (h * 6 < 1) return m1 + (m2 - m1) * h * 6; | |
if (h * 2 < 1) return m2; | |
if (h * 3 < 2) return m1 + (m2 - m1) * (0.66666 - h) * 6; | |
return m1; | |
}; | |
fb.RGBToHSL = function (rgb) { | |
var min, max, delta, h, s, l; | |
var r = rgb[0], g = rgb[1], b = rgb[2]; | |
min = Math.min(r, Math.min(g, b)); | |
max = Math.max(r, Math.max(g, b)); | |
delta = max - min; | |
l = (min + max) / 2; | |
s = 0; | |
if (l > 0 && l < 1) { | |
s = delta / (l < 0.5 ? (2 * l) : (2 - 2 * l)); | |
} | |
h = 0; | |
if (delta > 0) { | |
if (max == r && max != g) h += (g - b) / delta; | |
if (max == g && max != b) h += (2 + (b - r) / delta); | |
if (max == b && max != r) h += (4 + (r - g) / delta); | |
h /= 6; | |
} | |
return [h, s, l]; | |
}; | |
// Install mousedown handler (the others are set on the document on-demand) | |
$('*', e).on('mousedown', fb.mousedown); | |
// Init color | |
fb.setColor('#000000'); | |
// Set linked elements/callback | |
if (callback) { | |
fb.linkTo(callback); | |
} | |
}; | |
})(jQuery); |