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1 /*
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2 * tablesaw: A set of plugins for responsive tables
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3 * Swipe Toggle: swipe gesture (or buttons) to navigate which columns are shown.
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4 * Copyright (c) 2013 Filament Group, Inc.
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5 * MIT License
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6 */
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7
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8 (function() {
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9 var classes = {
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10 hideBtn: "disabled",
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11 persistWidths: "tablesaw-fix-persist",
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12 hiddenCol: "tablesaw-swipe-cellhidden",
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13 persistCol: "tablesaw-swipe-cellpersist",
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14 allColumnsVisible: "tablesaw-all-cols-visible"
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15 };
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16 var attrs = {
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17 disableTouchEvents: "data-tablesaw-no-touch",
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18 ignorerow: "data-tablesaw-ignorerow",
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19 subrow: "data-tablesaw-subrow"
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20 };
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21
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22 function createSwipeTable(tbl, $table) {
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23 var tblsaw = $table.data("tablesaw");
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24
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25 var $btns = $("<div class='tablesaw-advance'></div>");
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26 // TODO next major version: remove .btn
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27 var $prevBtn = $(
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28 "<a href='#' class='btn tablesaw-nav-btn tablesaw-btn btn-micro left'>" +
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29 Tablesaw.i18n.swipePreviousColumn +
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30 "</a>"
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31 ).appendTo($btns);
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32 // TODO next major version: remove .btn
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33 var $nextBtn = $(
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34 "<a href='#' class='btn tablesaw-nav-btn tablesaw-btn btn-micro right'>" +
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35 Tablesaw.i18n.swipeNextColumn +
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36 "</a>"
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37 ).appendTo($btns);
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38
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39 var $headerCells = tbl._getPrimaryHeaderCells();
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40 var $headerCellsNoPersist = $headerCells.not('[data-tablesaw-priority="persist"]');
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41 var headerWidths = [];
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42 var $head = $(document.head || "head");
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43 var tableId = $table.attr("id");
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44
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45 if (!$headerCells.length) {
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46 throw new Error("tablesaw swipe: no header cells found.");
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47 }
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48
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49 $table.addClass("tablesaw-swipe");
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50
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51 function initMinHeaderWidths() {
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52 $table.css({
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53 width: "1px"
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54 });
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55
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56 // remove any hidden columns
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57 $table.find("." + classes.hiddenCol).removeClass(classes.hiddenCol);
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58
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59 headerWidths = [];
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60 // Calculate initial widths
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61 $headerCells.each(function() {
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62 headerWidths.push(this.offsetWidth);
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63 });
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64
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65 // reset props
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66 $table.css({
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67 width: ""
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68 });
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69 }
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70
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71 initMinHeaderWidths();
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72
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73 $btns.appendTo(tblsaw.$toolbar);
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74
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75 if (!tableId) {
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76 tableId = "tableswipe-" + Math.round(Math.random() * 10000);
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77 $table.attr("id", tableId);
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78 }
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79
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80 function showColumn(headerCell) {
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81 tblsaw._$getCells(headerCell).removeClass(classes.hiddenCol);
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82 }
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83
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84 function hideColumn(headerCell) {
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85 tblsaw._$getCells(headerCell).addClass(classes.hiddenCol);
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86 }
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87
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88 function persistColumn(headerCell) {
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89 tblsaw._$getCells(headerCell).addClass(classes.persistCol);
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90 }
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91
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92 function isPersistent(headerCell) {
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93 return $(headerCell).is('[data-tablesaw-priority="persist"]');
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94 }
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95
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96 function unmaintainWidths() {
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97 $table.removeClass(classes.persistWidths);
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98 $("#" + tableId + "-persist").remove();
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99 }
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100
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101 function maintainWidths() {
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102 var prefix = "#" + tableId + ".tablesaw-swipe ",
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103 styles = [],
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104 tableWidth = $table.width(),
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105 hash = [],
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106 newHash;
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107
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108 // save persistent column widths (as long as they take up less than 75% of table width)
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109 $headerCells.each(function(index) {
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110 var width;
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111 if (isPersistent(this)) {
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112 width = this.offsetWidth;
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113
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114 if (width < tableWidth * 0.75) {
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115 hash.push(index + "-" + width);
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116 styles.push(
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117 prefix +
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118 " ." +
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119 classes.persistCol +
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120 ":nth-child(" +
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121 (index + 1) +
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122 ") { width: " +
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123 width +
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124 "px; }"
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125 );
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126 }
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127 }
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128 });
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129 newHash = hash.join("_");
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130
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131 if (styles.length) {
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132 $table.addClass(classes.persistWidths);
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133 var $style = $("#" + tableId + "-persist");
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134 // If style element not yet added OR if the widths have changed
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135 if (!$style.length || $style.data("tablesaw-hash") !== newHash) {
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136 // Remove existing
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137 $style.remove();
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138
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139 $("<style>" + styles.join("\n") + "</style>")
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140 .attr("id", tableId + "-persist")
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141 .data("tablesaw-hash", newHash)
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142 .appendTo($head);
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143 }
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144 }
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145 }
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146
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147 function getNext() {
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148 var next = [],
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149 checkFound;
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150
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151 $headerCellsNoPersist.each(function(i) {
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152 var $t = $(this),
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153 isHidden = $t.css("display") === "none" || $t.is("." + classes.hiddenCol);
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154
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155 if (!isHidden && !checkFound) {
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156 checkFound = true;
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157 next[0] = i;
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158 } else if (isHidden && checkFound) {
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159 next[1] = i;
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160
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161 return false;
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162 }
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163 });
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164
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165 return next;
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166 }
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167
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168 function getPrev() {
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169 var next = getNext();
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170 return [next[1] - 1, next[0] - 1];
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171 }
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172
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173 function nextpair(fwd) {
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174 return fwd ? getNext() : getPrev();
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175 }
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176
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177 function canAdvance(pair) {
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178 return pair[1] > -1 && pair[1] < $headerCellsNoPersist.length;
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179 }
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180
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181 function matchesMedia() {
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182 var matchMedia = $table.attr("data-tablesaw-swipe-media");
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183 return !matchMedia || ("matchMedia" in window && window.matchMedia(matchMedia).matches);
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184 }
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185
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186 function fakeBreakpoints() {
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187 if (!matchesMedia()) {
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188 return;
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189 }
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190
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191 var containerWidth = $table.parent().width(),
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192 persist = [],
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193 sum = 0,
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194 sums = [],
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195 visibleNonPersistantCount = $headerCells.length;
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196
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197 $headerCells.each(function(index) {
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198 var $t = $(this),
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199 isPersist = $t.is('[data-tablesaw-priority="persist"]');
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200
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201 persist.push(isPersist);
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202 sum += headerWidths[index];
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203 sums.push(sum);
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204
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205 // is persistent or is hidden
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206 if (isPersist || sum > containerWidth) {
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207 visibleNonPersistantCount--;
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208 }
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209 });
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210
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211 // We need at least one column to swipe.
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212 var needsNonPersistentColumn = visibleNonPersistantCount === 0;
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213
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214 $headerCells.each(function(index) {
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215 if (sums[index] > containerWidth) {
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216 hideColumn(this);
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217 }
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218 });
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219
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220 $headerCells.each(function(index) {
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221 if (persist[index]) {
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222 // for visual box-shadow
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223 persistColumn(this);
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224 return;
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225 }
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226
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227 if (sums[index] <= containerWidth || needsNonPersistentColumn) {
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228 needsNonPersistentColumn = false;
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229 showColumn(this);
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230 tblsaw.updateColspanCells(classes.hiddenCol, this, true);
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231 }
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232 });
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233
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234 unmaintainWidths();
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235
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236 $table.trigger("tablesawcolumns");
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237 }
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238
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239 function advance(fwd) {
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240 var pair = nextpair(fwd);
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241 if (canAdvance(pair)) {
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242 if (isNaN(pair[0])) {
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243 if (fwd) {
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244 pair[0] = 0;
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245 } else {
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246 pair[0] = $headerCellsNoPersist.length - 1;
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247 }
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248 }
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249
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250 // TODO just blindly hiding the previous column and showing the next column can result in
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251 // column content overflow
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252 maintainWidths();
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253 hideColumn($headerCellsNoPersist.get(pair[0]));
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254 tblsaw.updateColspanCells(classes.hiddenCol, $headerCellsNoPersist.get(pair[0]), false);
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255
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256 showColumn($headerCellsNoPersist.get(pair[1]));
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257 tblsaw.updateColspanCells(classes.hiddenCol, $headerCellsNoPersist.get(pair[1]), true);
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258
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259 $table.trigger("tablesawcolumns");
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260 }
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261 }
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262
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263 $prevBtn.add($nextBtn).on("click", function(e) {
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264 advance(!!$(e.target).closest($nextBtn).length);
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265 e.preventDefault();
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266 });
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267
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268 function getCoord(event, key) {
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269 return (event.touches || event.originalEvent.touches)[0][key];
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270 }
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271
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272 if (!$table.is("[" + attrs.disableTouchEvents + "]")) {
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273 $table.on("touchstart.swipetoggle", function(e) {
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274 var originX = getCoord(e, "pageX");
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275 var originY = getCoord(e, "pageY");
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276 var x;
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277 var y;
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278 var scrollTop = window.pageYOffset;
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279
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280 $(window).off(Tablesaw.events.resize, fakeBreakpoints);
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281
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282 $(this)
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283 .on("touchmove.swipetoggle", function(e) {
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284 x = getCoord(e, "pageX");
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285 y = getCoord(e, "pageY");
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286 })
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287 .on("touchend.swipetoggle", function() {
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288 var cfg = tbl.getConfig({
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289 swipeHorizontalThreshold: 30,
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290 swipeVerticalThreshold: 30
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291 });
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292
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293 // This config code is a little awkward because shoestring doesn’t support deep $.extend
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294 // Trying to work around when devs only override one of (not both) horizontalThreshold or
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295 // verticalThreshold in their TablesawConfig.
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296 // @TODO major version bump: remove cfg.swipe, move to just use the swipePrefix keys
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297 var verticalThreshold = cfg.swipe
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298 ? cfg.swipe.verticalThreshold
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299 : cfg.swipeVerticalThreshold;
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300 var horizontalThreshold = cfg.swipe
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301 ? cfg.swipe.horizontalThreshold
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302 : cfg.swipeHorizontalThreshold;
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303
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304 var isPageScrolled = Math.abs(window.pageYOffset - scrollTop) >= verticalThreshold;
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305 var isVerticalSwipe = Math.abs(y - originY) >= verticalThreshold;
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306
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307 if (!isVerticalSwipe && !isPageScrolled) {
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308 if (x - originX < -1 * horizontalThreshold) {
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309 advance(true);
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310 }
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311 if (x - originX > horizontalThreshold) {
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312 advance(false);
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313 }
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314 }
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315
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316 window.setTimeout(function() {
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317 $(window).on(Tablesaw.events.resize, fakeBreakpoints);
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318 }, 300);
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319
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320 $(this).off("touchmove.swipetoggle touchend.swipetoggle");
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321 });
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322 });
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323 }
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324
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325 $table
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326 .on("tablesawcolumns.swipetoggle", function() {
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327 var canGoPrev = canAdvance(getPrev());
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328 var canGoNext = canAdvance(getNext());
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329 $prevBtn[canGoPrev ? "removeClass" : "addClass"](classes.hideBtn);
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330 $nextBtn[canGoNext ? "removeClass" : "addClass"](classes.hideBtn);
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331
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332 tblsaw.$toolbar[!canGoPrev && !canGoNext ? "addClass" : "removeClass"](
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333 classes.allColumnsVisible
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334 );
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335 })
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336 .on("tablesawnext.swipetoggle", function() {
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337 advance(true);
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338 })
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339 .on("tablesawprev.swipetoggle", function() {
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340 advance(false);
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341 })
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342 .on(Tablesaw.events.destroy + ".swipetoggle", function() {
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343 var $t = $(this);
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344
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345 $t.removeClass("tablesaw-swipe");
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346 tblsaw.$toolbar.find(".tablesaw-advance").remove();
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347 $(window).off(Tablesaw.events.resize, fakeBreakpoints);
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348
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349 $t.off(".swipetoggle");
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350 })
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351 .on(Tablesaw.events.refresh, function() {
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352 unmaintainWidths();
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353 initMinHeaderWidths();
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354 fakeBreakpoints();
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355 });
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356
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357 fakeBreakpoints();
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358 $(window).on(Tablesaw.events.resize, fakeBreakpoints);
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359 }
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360
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361 // on tablecreate, init
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362 $(document).on(Tablesaw.events.create, function(e, tablesaw) {
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363 if (tablesaw.mode === "swipe") {
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364 createSwipeTable(tablesaw, tablesaw.$table);
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365 }
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366 });
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367
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368 // TODO OOP this and add to Tablesaw object
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369 })();
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