1 | |
---|
2 | Drupal.behaviors.color = function (context) { |
---|
3 | // This behavior attaches by ID, so is only valid once on a page. |
---|
4 | if ($('#color_scheme_form .color-form.color-processed').size()) { |
---|
5 | return; |
---|
6 | } |
---|
7 | var form = $('#color_scheme_form .color-form', context); |
---|
8 | var inputs = []; |
---|
9 | var hooks = []; |
---|
10 | var locks = []; |
---|
11 | var focused = null; |
---|
12 | |
---|
13 | // Add Farbtastic |
---|
14 | $(form).prepend('<div id="placeholder"></div>').addClass('color-processed'); |
---|
15 | var farb = $.farbtastic('#placeholder'); |
---|
16 | |
---|
17 | // Decode reference colors to HSL |
---|
18 | var reference = Drupal.settings.color.reference; |
---|
19 | for (i in reference) { |
---|
20 | reference[i] = farb.RGBToHSL(farb.unpack(reference[i])); |
---|
21 | } |
---|
22 | |
---|
23 | // Build preview |
---|
24 | $('#preview:not(.color-processed)') |
---|
25 | .append('<div id="gradient"></div>') |
---|
26 | .addClass('color-processed'); |
---|
27 | var gradient = $('#preview #gradient'); |
---|
28 | var h = parseInt(gradient.css('height')) / 10; |
---|
29 | for (i = 0; i < h; ++i) { |
---|
30 | gradient.append('<div class="gradient-line"></div>'); |
---|
31 | } |
---|
32 | |
---|
33 | // Fix preview background in IE6 |
---|
34 | if (navigator.appVersion.match(/MSIE [0-6]\./)) { |
---|
35 | var e = $('#preview #img')[0]; |
---|
36 | var image = e.currentStyle.backgroundImage; |
---|
37 | e.style.backgroundImage = 'none'; |
---|
38 | e.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image.substring(5, image.length - 2) + "')"; |
---|
39 | } |
---|
40 | |
---|
41 | // Set up colorscheme selector |
---|
42 | $('#edit-scheme', form).change(function () { |
---|
43 | var colors = this.options[this.selectedIndex].value; |
---|
44 | if (colors != '') { |
---|
45 | colors = colors.split(','); |
---|
46 | for (i in colors) { |
---|
47 | callback(inputs[i], colors[i], false, true); |
---|
48 | } |
---|
49 | preview(); |
---|
50 | } |
---|
51 | }); |
---|
52 | |
---|
53 | /** |
---|
54 | * Render the preview. |
---|
55 | */ |
---|
56 | function preview() { |
---|
57 | // Solid background |
---|
58 | $('#preview', form).css('backgroundColor', inputs[0].value); |
---|
59 | |
---|
60 | // Text preview |
---|
61 | $('#text', form).css('color', inputs[4].value); |
---|
62 | $('#text a, #text h2', form).css('color', inputs[1].value); |
---|
63 | |
---|
64 | // Set up gradient |
---|
65 | var top = farb.unpack(inputs[2].value); |
---|
66 | var bottom = farb.unpack(inputs[3].value); |
---|
67 | if (top && bottom) { |
---|
68 | var delta = []; |
---|
69 | for (i in top) { |
---|
70 | delta[i] = (bottom[i] - top[i]) / h; |
---|
71 | } |
---|
72 | var accum = top; |
---|
73 | |
---|
74 | // Render gradient lines |
---|
75 | $('#gradient > div', form).each(function () { |
---|
76 | for (i in accum) { |
---|
77 | accum[i] += delta[i]; |
---|
78 | } |
---|
79 | this.style.backgroundColor = farb.pack(accum); |
---|
80 | }); |
---|
81 | } |
---|
82 | } |
---|
83 | |
---|
84 | /** |
---|
85 | * Shift a given color, using a reference pair (ref in HSL). |
---|
86 | * |
---|
87 | * This algorithm ensures relative ordering on the saturation and luminance |
---|
88 | * axes is preserved, and performs a simple hue shift. |
---|
89 | * |
---|
90 | * It is also symmetrical. If: shift_color(c, a, b) == d, |
---|
91 | * then shift_color(d, b, a) == c. |
---|
92 | */ |
---|
93 | function shift_color(given, ref1, ref2) { |
---|
94 | // Convert to HSL |
---|
95 | given = farb.RGBToHSL(farb.unpack(given)); |
---|
96 | |
---|
97 | // Hue: apply delta |
---|
98 | given[0] += ref2[0] - ref1[0]; |
---|
99 | |
---|
100 | // Saturation: interpolate |
---|
101 | if (ref1[1] == 0 || ref2[1] == 0) { |
---|
102 | given[1] = ref2[1]; |
---|
103 | } |
---|
104 | else { |
---|
105 | var d = ref1[1] / ref2[1]; |
---|
106 | if (d > 1) { |
---|
107 | given[1] /= d; |
---|
108 | } |
---|
109 | else { |
---|
110 | given[1] = 1 - (1 - given[1]) * d; |
---|
111 | } |
---|
112 | } |
---|
113 | |
---|
114 | // Luminance: interpolate |
---|
115 | if (ref1[2] == 0 || ref2[2] == 0) { |
---|
116 | given[2] = ref2[2]; |
---|
117 | } |
---|
118 | else { |
---|
119 | var d = ref1[2] / ref2[2]; |
---|
120 | if (d > 1) { |
---|
121 | given[2] /= d; |
---|
122 | } |
---|
123 | else { |
---|
124 | given[2] = 1 - (1 - given[2]) * d; |
---|
125 | } |
---|
126 | } |
---|
127 | |
---|
128 | return farb.pack(farb.HSLToRGB(given)); |
---|
129 | } |
---|
130 | |
---|
131 | /** |
---|
132 | * Callback for Farbtastic when a new color is chosen. |
---|
133 | */ |
---|
134 | function callback(input, color, propagate, colorscheme) { |
---|
135 | // Set background/foreground color |
---|
136 | $(input).css({ |
---|
137 | backgroundColor: color, |
---|
138 | 'color': farb.RGBToHSL(farb.unpack(color))[2] > 0.5 ? '#000' : '#fff' |
---|
139 | }); |
---|
140 | |
---|
141 | // Change input value |
---|
142 | if (input.value && input.value != color) { |
---|
143 | input.value = color; |
---|
144 | |
---|
145 | // Update locked values |
---|
146 | if (propagate) { |
---|
147 | var i = input.i; |
---|
148 | for (j = i + 1; ; ++j) { |
---|
149 | if (!locks[j - 1] || $(locks[j - 1]).is('.unlocked')) break; |
---|
150 | var matched = shift_color(color, reference[input.key], reference[inputs[j].key]); |
---|
151 | callback(inputs[j], matched, false); |
---|
152 | } |
---|
153 | for (j = i - 1; ; --j) { |
---|
154 | if (!locks[j] || $(locks[j]).is('.unlocked')) break; |
---|
155 | var matched = shift_color(color, reference[input.key], reference[inputs[j].key]); |
---|
156 | callback(inputs[j], matched, false); |
---|
157 | } |
---|
158 | |
---|
159 | // Update preview |
---|
160 | preview(); |
---|
161 | } |
---|
162 | |
---|
163 | // Reset colorscheme selector |
---|
164 | if (!colorscheme) { |
---|
165 | resetScheme(); |
---|
166 | } |
---|
167 | } |
---|
168 | |
---|
169 | } |
---|
170 | |
---|
171 | /** |
---|
172 | * Reset the color scheme selector. |
---|
173 | */ |
---|
174 | function resetScheme() { |
---|
175 | $('#edit-scheme', form).each(function () { |
---|
176 | this.selectedIndex = this.options.length - 1; |
---|
177 | }); |
---|
178 | } |
---|
179 | |
---|
180 | // Focus the Farbtastic on a particular field. |
---|
181 | function focus() { |
---|
182 | var input = this; |
---|
183 | // Remove old bindings |
---|
184 | focused && $(focused).unbind('keyup', farb.updateValue) |
---|
185 | .unbind('keyup', preview).unbind('keyup', resetScheme) |
---|
186 | .parent().removeClass('item-selected'); |
---|
187 | |
---|
188 | // Add new bindings |
---|
189 | focused = this; |
---|
190 | farb.linkTo(function (color) { callback(input, color, true, false); }); |
---|
191 | farb.setColor(this.value); |
---|
192 | $(focused).keyup(farb.updateValue).keyup(preview).keyup(resetScheme) |
---|
193 | .parent().addClass('item-selected'); |
---|
194 | } |
---|
195 | |
---|
196 | // Initialize color fields |
---|
197 | $('#palette input.form-text', form) |
---|
198 | .each(function () { |
---|
199 | // Extract palette field name |
---|
200 | this.key = this.id.substring(13); |
---|
201 | |
---|
202 | // Link to color picker temporarily to initialize. |
---|
203 | farb.linkTo(function () {}).setColor('#000').linkTo(this); |
---|
204 | |
---|
205 | // Add lock |
---|
206 | var i = inputs.length; |
---|
207 | if (inputs.length) { |
---|
208 | var lock = $('<div class="lock"></div>').toggle( |
---|
209 | function () { |
---|
210 | $(this).addClass('unlocked'); |
---|
211 | $(hooks[i - 1]).attr('class', |
---|
212 | locks[i - 2] && $(locks[i - 2]).is(':not(.unlocked)') ? 'hook up' : 'hook' |
---|
213 | ); |
---|
214 | $(hooks[i]).attr('class', |
---|
215 | locks[i] && $(locks[i]).is(':not(.unlocked)') ? 'hook down' : 'hook' |
---|
216 | ); |
---|
217 | }, |
---|
218 | function () { |
---|
219 | $(this).removeClass('unlocked'); |
---|
220 | $(hooks[i - 1]).attr('class', |
---|
221 | locks[i - 2] && $(locks[i - 2]).is(':not(.unlocked)') ? 'hook both' : 'hook down' |
---|
222 | ); |
---|
223 | $(hooks[i]).attr('class', |
---|
224 | locks[i] && $(locks[i]).is(':not(.unlocked)') ? 'hook both' : 'hook up' |
---|
225 | ); |
---|
226 | } |
---|
227 | ); |
---|
228 | $(this).after(lock); |
---|
229 | locks.push(lock); |
---|
230 | }; |
---|
231 | |
---|
232 | // Add hook |
---|
233 | var hook = $('<div class="hook"></div>'); |
---|
234 | $(this).after(hook); |
---|
235 | hooks.push(hook); |
---|
236 | |
---|
237 | $(this).parent().find('.lock').click(); |
---|
238 | this.i = i; |
---|
239 | inputs.push(this); |
---|
240 | }) |
---|
241 | .focus(focus); |
---|
242 | |
---|
243 | $('#palette label', form); |
---|
244 | |
---|
245 | // Focus first color |
---|
246 | focus.call(inputs[0]); |
---|
247 | |
---|
248 | // Render preview |
---|
249 | preview(); |
---|
250 | }; |
---|