root / drupal7 / modules / color / color.js @ 01f36513
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/**
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* @file
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* Attaches the behaviors for the Color module.
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*/
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(function ($) { |
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Drupal.behaviors.color = { |
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attach: function (context, settings) { |
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var i, j, colors, field_name;
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// This behavior attaches by ID, so is only valid once on a page.
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var form = $('#system-theme-settings .color-form', context).once('color'); |
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if (form.length == 0) { |
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return;
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} |
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var inputs = [];
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var hooks = [];
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var locks = [];
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var focused = null; |
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// Add Farbtastic.
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$(form).prepend('<div id="placeholder"></div>').addClass('color-processed'); |
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var farb = $.farbtastic('#placeholder'); |
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// Decode reference colors to HSL.
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var reference = settings.color.reference;
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for (i in reference) { |
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reference[i] = farb.RGBToHSL(farb.unpack(reference[i])); |
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} |
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// Build a preview.
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var height = [];
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var width = [];
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// Loop through all defined gradients.
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for (i in settings.gradients) { |
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// Add element to display the gradient.
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$('#preview').once('color').append('<div id="gradient-' + i + '"></div>'); |
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var gradient = $('#preview #gradient-' + i); |
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// Add height of current gradient to the list (divided by 10).
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height.push(parseInt(gradient.css('height'), 10) / 10); |
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// Add width of current gradient to the list (divided by 10).
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width.push(parseInt(gradient.css('width'), 10) / 10); |
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// Add rows (or columns for horizontal gradients).
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// Each gradient line should have a height (or width for horizontal
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// gradients) of 10px (because we divided the height/width by 10 above).
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for (j = 0; j < (settings.gradients[i]['direction'] == 'vertical' ? height[i] : width[i]); ++j) { |
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gradient.append('<div class="gradient-line"></div>');
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} |
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} |
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// Fix preview background in IE6.
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if (navigator.appVersion.match(/MSIE [0-6]\./)) { |
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var e = $('#preview #img')[0]; |
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var image = e.currentStyle.backgroundImage;
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e.style.backgroundImage = 'none';
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e.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image.substring(5, image.length - 2) + "')"; |
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} |
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// Set up colorScheme selector.
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$('#edit-scheme', form).change(function () { |
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var schemes = settings.color.schemes, colorScheme = this.options[this.selectedIndex].value; |
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if (colorScheme != '' && schemes[colorScheme]) { |
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// Get colors of active scheme.
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colors = schemes[colorScheme]; |
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for (field_name in colors) { |
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callback($('#edit-palette-' + field_name), colors[field_name], false, true); |
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} |
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preview(); |
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} |
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}); |
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/**
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* Renders the preview.
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*/
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function preview() { |
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Drupal.color.callback(context, settings, form, farb, height, width); |
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} |
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/**
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* Shifts a given color, using a reference pair (ref in HSL).
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*
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* This algorithm ensures relative ordering on the saturation and luminance
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* axes is preserved, and performs a simple hue shift.
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*
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* It is also symmetrical. If: shift_color(c, a, b) == d, then
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* shift_color(d, b, a) == c.
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*/
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function shift_color(given, ref1, ref2) { |
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// Convert to HSL.
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given = farb.RGBToHSL(farb.unpack(given)); |
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// Hue: apply delta.
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given[0] += ref2[0] - ref1[0]; |
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// Saturation: interpolate.
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if (ref1[1] == 0 || ref2[1] == 0) { |
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given[1] = ref2[1]; |
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} |
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else {
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var d = ref1[1] / ref2[1]; |
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if (d > 1) { |
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given[1] /= d;
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} |
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else {
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given[1] = 1 - (1 - given[1]) * d; |
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} |
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} |
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// Luminance: interpolate.
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if (ref1[2] == 0 || ref2[2] == 0) { |
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given[2] = ref2[2]; |
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} |
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else {
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var d = ref1[2] / ref2[2]; |
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if (d > 1) { |
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given[2] /= d;
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} |
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else {
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given[2] = 1 - (1 - given[2]) * d; |
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} |
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} |
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return farb.pack(farb.HSLToRGB(given));
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} |
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/**
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* Callback for Farbtastic when a new color is chosen.
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*/
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function callback(input, color, propagate, colorScheme) { |
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var matched;
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// Set background/foreground colors.
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$(input).css({
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backgroundColor: color,
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'color': farb.RGBToHSL(farb.unpack(color))[2] > 0.5 ? '#000' : '#fff' |
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}); |
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// Change input value.
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if ($(input).val() && $(input).val() != color) { |
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$(input).val(color);
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// Update locked values.
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if (propagate) {
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i = input.i; |
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for (j = i + 1; ; ++j) { |
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if (!locks[j - 1] || $(locks[j - 1]).is('.unlocked')) break; |
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matched = shift_color(color, reference[input.key], reference[inputs[j].key]); |
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callback(inputs[j], matched, false);
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} |
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for (j = i - 1; ; --j) { |
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if (!locks[j] || $(locks[j]).is('.unlocked')) break; |
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matched = shift_color(color, reference[input.key], reference[inputs[j].key]); |
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callback(inputs[j], matched, false);
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} |
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// Update preview.
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preview(); |
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} |
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// Reset colorScheme selector.
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if (!colorScheme) {
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resetScheme(); |
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} |
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} |
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} |
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/**
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* Resets the color scheme selector.
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*/
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function resetScheme() { |
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$('#edit-scheme', form).each(function () { |
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this.selectedIndex = this.options.length - 1; |
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}); |
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} |
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/**
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* Focuses Farbtastic on a particular field.
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*/
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function focus() { |
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var input = this; |
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// Remove old bindings.
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focused && $(focused).unbind('keyup', farb.updateValue) |
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.unbind('keyup', preview).unbind('keyup', resetScheme) |
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.parent().removeClass('item-selected');
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// Add new bindings.
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focused = this;
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farb.linkTo(function (color) { callback(input, color, true, false); }); |
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farb.setColor(this.value);
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$(focused).keyup(farb.updateValue).keyup(preview).keyup(resetScheme)
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.parent().addClass('item-selected');
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} |
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// Initialize color fields.
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$('#palette input.form-text', form) |
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.each(function () {
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// Extract palette field name
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this.key = this.id.substring(13); |
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// Link to color picker temporarily to initialize.
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farb.linkTo(function () {}).setColor('#000').linkTo(this); |
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// Add lock.
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var i = inputs.length;
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if (inputs.length) {
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var lock = $('<div class="lock"></div>').toggle( |
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function () {
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$(this).addClass('unlocked'); |
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$(hooks[i - 1]).attr('class', |
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locks[i - 2] && $(locks[i - 2]).is(':not(.unlocked)') ? 'hook up' : 'hook' |
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); |
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$(hooks[i]).attr('class', |
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locks[i] && $(locks[i]).is(':not(.unlocked)') ? 'hook down' : 'hook' |
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); |
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}, |
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function () {
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$(this).removeClass('unlocked'); |
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$(hooks[i - 1]).attr('class', |
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locks[i - 2] && $(locks[i - 2]).is(':not(.unlocked)') ? 'hook both' : 'hook down' |
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); |
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$(hooks[i]).attr('class', |
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locks[i] && $(locks[i]).is(':not(.unlocked)') ? 'hook both' : 'hook up' |
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); |
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} |
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); |
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$(this).after(lock); |
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locks.push(lock); |
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}; |
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// Add hook.
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var hook = $('<div class="hook"></div>'); |
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$(this).after(hook); |
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hooks.push(hook); |
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$(this).parent().find('.lock').click(); |
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this.i = i;
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inputs.push(this);
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}) |
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.focus(focus); |
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$('#palette label', form); |
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// Focus first color.
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focus.call(inputs[0]);
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// Render preview.
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preview(); |
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} |
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}; |
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})(jQuery); |