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| 1 | +require(['gitbook', 'jquery'], function(gitbook, $) { |
| 2 | + // Configuration |
| 3 | + var MAX_SIZE = 4, |
| 4 | + MIN_SIZE = 0, |
| 5 | + BUTTON_ID; |
| 6 | + |
| 7 | + // Current fontsettings state |
| 8 | + var fontState; |
| 9 | + |
| 10 | + // Default themes |
| 11 | + var THEMES = [ |
| 12 | + { |
| 13 | + config: 'white', |
| 14 | + text: 'White', |
| 15 | + id: 0 |
| 16 | + }, |
| 17 | + { |
| 18 | + config: 'sepia', |
| 19 | + text: 'Sepia', |
| 20 | + id: 1 |
| 21 | + }, |
| 22 | + { |
| 23 | + config: 'night', |
| 24 | + text: 'Night', |
| 25 | + id: 2 |
| 26 | + } |
| 27 | + ]; |
| 28 | + |
| 29 | + // Default font families |
| 30 | + var FAMILIES = [ |
| 31 | + { |
| 32 | + config: 'serif', |
| 33 | + text: 'Serif', |
| 34 | + id: 0 |
| 35 | + }, |
| 36 | + { |
| 37 | + config: 'sans', |
| 38 | + text: 'Sans', |
| 39 | + id: 1 |
| 40 | + } |
| 41 | + ]; |
| 42 | + |
| 43 | + // Return configured themes |
| 44 | + function getThemes() { |
| 45 | + return THEMES; |
| 46 | + } |
| 47 | + |
| 48 | + // Modify configured themes |
| 49 | + function setThemes(themes) { |
| 50 | + THEMES = themes; |
| 51 | + updateButtons(); |
| 52 | + } |
| 53 | + |
| 54 | + // Return configured font families |
| 55 | + function getFamilies() { |
| 56 | + return FAMILIES; |
| 57 | + } |
| 58 | + |
| 59 | + // Modify configured font families |
| 60 | + function setFamilies(families) { |
| 61 | + FAMILIES = families; |
| 62 | + updateButtons(); |
| 63 | + } |
| 64 | + |
| 65 | + // Save current font settings |
| 66 | + function saveFontSettings() { |
| 67 | + gitbook.storage.set('fontState', fontState); |
| 68 | + update(); |
| 69 | + } |
| 70 | + |
| 71 | + // Increase font size |
| 72 | + function enlargeFontSize(e) { |
| 73 | + e.preventDefault(); |
| 74 | + if (fontState.size >= MAX_SIZE) return; |
| 75 | + |
| 76 | + fontState.size++; |
| 77 | + saveFontSettings(); |
| 78 | + } |
| 79 | + |
| 80 | + // Decrease font size |
| 81 | + function reduceFontSize(e) { |
| 82 | + e.preventDefault(); |
| 83 | + if (fontState.size <= MIN_SIZE) return; |
| 84 | + |
| 85 | + fontState.size--; |
| 86 | + saveFontSettings(); |
| 87 | + } |
| 88 | + |
| 89 | + // Change font family |
| 90 | + function changeFontFamily(configName, e) { |
| 91 | + if (e && e instanceof Event) { |
| 92 | + e.preventDefault(); |
| 93 | + } |
| 94 | + |
| 95 | + var familyId = getFontFamilyId(configName); |
| 96 | + fontState.family = familyId; |
| 97 | + saveFontSettings(); |
| 98 | + } |
| 99 | + |
| 100 | + // Change type of color theme |
| 101 | + function changeColorTheme(configName, e) { |
| 102 | + if (e && e instanceof Event) { |
| 103 | + e.preventDefault(); |
| 104 | + } |
| 105 | + |
| 106 | + var $book = gitbook.state.$book; |
| 107 | + |
| 108 | + // Remove currently applied color theme |
| 109 | + if (fontState.theme !== 0) |
| 110 | + $book.removeClass('color-theme-'+fontState.theme); |
| 111 | + |
| 112 | + // Set new color theme |
| 113 | + var themeId = getThemeId(configName); |
| 114 | + fontState.theme = themeId; |
| 115 | + if (fontState.theme !== 0) |
| 116 | + $book.addClass('color-theme-'+fontState.theme); |
| 117 | + |
| 118 | + saveFontSettings(); |
| 119 | + } |
| 120 | + |
| 121 | + // Return the correct id for a font-family config key |
| 122 | + // Default to first font-family |
| 123 | + function getFontFamilyId(configName) { |
| 124 | + // Search for plugin configured font family |
| 125 | + var configFamily = $.grep(FAMILIES, function(family) { |
| 126 | + return family.config == configName; |
| 127 | + })[0]; |
| 128 | + // Fallback to default font family |
| 129 | + return (!!configFamily)? configFamily.id : 0; |
| 130 | + } |
| 131 | + |
| 132 | + // Return the correct id for a theme config key |
| 133 | + // Default to first theme |
| 134 | + function getThemeId(configName) { |
| 135 | + // Search for plugin configured theme |
| 136 | + var configTheme = $.grep(THEMES, function(theme) { |
| 137 | + return theme.config == configName; |
| 138 | + })[0]; |
| 139 | + // Fallback to default theme |
| 140 | + return (!!configTheme)? configTheme.id : 0; |
| 141 | + } |
| 142 | + |
| 143 | + function update() { |
| 144 | + var $book = gitbook.state.$book; |
| 145 | + |
| 146 | + $('.font-settings .font-family-list li').removeClass('active'); |
| 147 | + $('.font-settings .font-family-list li:nth-child('+(fontState.family+1)+')').addClass('active'); |
| 148 | + |
| 149 | + $book[0].className = $book[0].className.replace(/\bfont-\S+/g, ''); |
| 150 | + $book.addClass('font-size-'+fontState.size); |
| 151 | + $book.addClass('font-family-'+fontState.family); |
| 152 | + |
| 153 | + if(fontState.theme !== 0) { |
| 154 | + $book[0].className = $book[0].className.replace(/\bcolor-theme-\S+/g, ''); |
| 155 | + $book.addClass('color-theme-'+fontState.theme); |
| 156 | + } |
| 157 | + } |
| 158 | + |
| 159 | + function init(config) { |
| 160 | + // Search for plugin configured font family |
| 161 | + var configFamily = getFontFamilyId(config.family), |
| 162 | + configTheme = getThemeId(config.theme); |
| 163 | + |
| 164 | + // Instantiate font state object |
| 165 | + fontState = gitbook.storage.get('fontState', { |
| 166 | + size: config.size || 2, |
| 167 | + family: configFamily, |
| 168 | + theme: configTheme |
| 169 | + }); |
| 170 | + |
| 171 | + update(); |
| 172 | + } |
| 173 | + |
| 174 | + function updateButtons() { |
| 175 | + // Remove existing fontsettings buttons |
| 176 | + if (!!BUTTON_ID) { |
| 177 | + gitbook.toolbar.removeButton(BUTTON_ID); |
| 178 | + } |
| 179 | + |
| 180 | + // Create buttons in toolbar |
| 181 | + BUTTON_ID = gitbook.toolbar.createButton({ |
| 182 | + icon: 'fa fa-font', |
| 183 | + label: 'Font Settings', |
| 184 | + className: 'font-settings', |
| 185 | + dropdown: [ |
| 186 | + [ |
| 187 | + { |
| 188 | + text: 'A', |
| 189 | + className: 'font-reduce', |
| 190 | + onClick: reduceFontSize |
| 191 | + }, |
| 192 | + { |
| 193 | + text: 'A', |
| 194 | + className: 'font-enlarge', |
| 195 | + onClick: enlargeFontSize |
| 196 | + } |
| 197 | + ], |
| 198 | + $.map(FAMILIES, function(family) { |
| 199 | + family.onClick = function(e) { |
| 200 | + return changeFontFamily(family.config, e); |
| 201 | + }; |
| 202 | + |
| 203 | + return family; |
| 204 | + }), |
| 205 | + $.map(THEMES, function(theme) { |
| 206 | + theme.onClick = function(e) { |
| 207 | + return changeColorTheme(theme.config, e); |
| 208 | + }; |
| 209 | + |
| 210 | + return theme; |
| 211 | + }) |
| 212 | + ] |
| 213 | + }); |
| 214 | + } |
| 215 | + |
| 216 | + // Init configuration at start |
| 217 | + gitbook.events.bind('start', function(e, config) { |
| 218 | + var opts = config.fontsettings; |
| 219 | + |
| 220 | + // Generate buttons at start |
| 221 | + updateButtons(); |
| 222 | + |
| 223 | + // Init current settings |
| 224 | + init(opts); |
| 225 | + }); |
| 226 | + |
| 227 | + // Expose API |
| 228 | + gitbook.fontsettings = { |
| 229 | + enlargeFontSize: enlargeFontSize, |
| 230 | + reduceFontSize: reduceFontSize, |
| 231 | + setTheme: changeColorTheme, |
| 232 | + setFamily: changeFontFamily, |
| 233 | + getThemes: getThemes, |
| 234 | + setThemes: setThemes, |
| 235 | + getFamilies: getFamilies, |
| 236 | + setFamilies: setFamilies |
| 237 | + }; |
| 238 | +}); |
| 239 | + |
| 240 | + |
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