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| -rw-r--r-- | js/farbtastic/farbtastic.js | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/js/farbtastic/farbtastic.js b/js/farbtastic/farbtastic.js new file mode 100644 index 000000000..d8b5ad9cd --- /dev/null +++ b/js/farbtastic/farbtastic.js @@ -0,0 +1,345 @@ +/** + * Farbtastic Color Picker 1.2 + * © 2008 Steven Wittens + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +jQuery.fn.farbtastic = function (callback) { + $.farbtastic(this, callback); + return this; +}; + +jQuery.farbtastic = function (container, callback) { + var container = $(container).get(0); + return container.farbtastic || (container.farbtastic = new jQuery._farbtastic(container, callback)); +} + +jQuery._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).unbind('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.bind('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 x, y; + var el = event.target || event.srcElement; + var reference = fb.wheel; + + if (typeof event.offsetX != 'undefined') { + // Use offset coordinates and find common offsetParent + var pos = { x: event.offsetX, y: event.offsetY }; + + // Send the coordinates upwards through the offsetParent chain. + var e = el; + while (e) { + e.mouseX = pos.x; + e.mouseY = pos.y; + pos.x += e.offsetLeft; + pos.y += e.offsetTop; + e = e.offsetParent; + } + + // Look for the coordinates starting from the wheel widget. + var e = reference; + var offset = { x: 0, y: 0 } + while (e) { + if (typeof e.mouseX != 'undefined') { + x = e.mouseX - offset.x; + y = e.mouseY - offset.y; + break; + } + offset.x += e.offsetLeft; + offset.y += e.offsetTop; + e = e.offsetParent; + } + + // Reset stored coordinates + e = el; + while (e) { + e.mouseX = undefined; + e.mouseY = undefined; + e = e.offsetParent; + } + } + else { + // Use absolute coordinates + var pos = fb.absolutePosition(reference); + x = (event.pageX || 0*(event.clientX + $('html').get(0).scrollLeft)) - pos.x; + y = (event.pageY || 0*(event.clientY + $('html').get(0).scrollTop)) - pos.y; + } + // Subtract distance to middle + return { x: x - fb.width / 2, y: y - fb.width / 2 }; + } + + /** + * Mousedown handler + */ + fb.mousedown = function (event) { + // Capture mouse + if (!document.dragging) { + $(document).bind('mousemove', fb.mousemove).bind('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).unbind('mousemove', fb.mousemove); + $(document).unbind('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); + } + } + + /** + * Get absolute position of element + */ + fb.absolutePosition = function (el) { + var r = { x: el.offsetLeft, y: el.offsetTop }; + // Resolve relative to offsetParent + if (el.offsetParent) { + var tmp = fb.absolutePosition(el.offsetParent); + r.x += tmp.x; + r.y += tmp.y; + } + return r; + }; + + /* 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).mousedown(fb.mousedown); + + // Init color + fb.setColor('#000000'); + + // Set linked elements/callback + if (callback) { + fb.linkTo(callback); + } +}
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