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1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
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2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
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3
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4 (function(mod) {
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5 if (typeof exports == "object" && typeof module == "object") // CommonJS
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6 mod(require("../../lib/codemirror"));
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../../lib/codemirror"], mod);
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9 else // Plain browser env
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10 mod(CodeMirror);
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11 })(function(CodeMirror) {
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12 "use strict";
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13
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14 function Bar(cls, orientation, scroll) {
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15 this.orientation = orientation;
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16 this.scroll = scroll;
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17 this.screen = this.total = this.size = 1;
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18 this.pos = 0;
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19
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20 this.node = document.createElement("div");
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21 this.node.className = cls + "-" + orientation;
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22 this.inner = this.node.appendChild(document.createElement("div"));
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23
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24 var self = this;
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25 CodeMirror.on(this.inner, "mousedown", function(e) {
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26 if (e.which != 1) return;
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27 CodeMirror.e_preventDefault(e);
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28 var axis = self.orientation == "horizontal" ? "pageX" : "pageY";
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29 var start = e[axis], startpos = self.pos;
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30 function done() {
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31 CodeMirror.off(document, "mousemove", move);
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32 CodeMirror.off(document, "mouseup", done);
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33 }
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34 function move(e) {
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35 if (e.which != 1) return done();
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36 self.moveTo(startpos + (e[axis] - start) * (self.total / self.size));
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37 }
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38 CodeMirror.on(document, "mousemove", move);
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39 CodeMirror.on(document, "mouseup", done);
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40 });
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41
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42 CodeMirror.on(this.node, "click", function(e) {
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43 CodeMirror.e_preventDefault(e);
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44 var innerBox = self.inner.getBoundingClientRect(), where;
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45 if (self.orientation == "horizontal")
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46 where = e.clientX < innerBox.left ? -1 : e.clientX > innerBox.right ? 1 : 0;
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47 else
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48 where = e.clientY < innerBox.top ? -1 : e.clientY > innerBox.bottom ? 1 : 0;
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49 self.moveTo(self.pos + where * self.screen);
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50 });
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51
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52 function onWheel(e) {
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53 var moved = CodeMirror.wheelEventPixels(e)[self.orientation == "horizontal" ? "x" : "y"];
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54 var oldPos = self.pos;
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55 self.moveTo(self.pos + moved);
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56 if (self.pos != oldPos) CodeMirror.e_preventDefault(e);
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57 }
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58 CodeMirror.on(this.node, "mousewheel", onWheel);
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59 CodeMirror.on(this.node, "DOMMouseScroll", onWheel);
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60 }
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61
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62 Bar.prototype.setPos = function(pos, force) {
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63 if (pos < 0) pos = 0;
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64 if (pos > this.total - this.screen) pos = this.total - this.screen;
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65 if (!force && pos == this.pos) return false;
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66 this.pos = pos;
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67 this.inner.style[this.orientation == "horizontal" ? "left" : "top"] =
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68 (pos * (this.size / this.total)) + "px";
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69 return true
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70 };
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71
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72 Bar.prototype.moveTo = function(pos) {
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73 if (this.setPos(pos)) this.scroll(pos, this.orientation);
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74 }
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75
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76 var minButtonSize = 10;
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77
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78 Bar.prototype.update = function(scrollSize, clientSize, barSize) {
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79 var sizeChanged = this.screen != clientSize || this.total != scrollSize || this.size != barSize
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80 if (sizeChanged) {
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81 this.screen = clientSize;
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82 this.total = scrollSize;
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83 this.size = barSize;
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84 }
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85
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86 var buttonSize = this.screen * (this.size / this.total);
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87 if (buttonSize < minButtonSize) {
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88 this.size -= minButtonSize - buttonSize;
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89 buttonSize = minButtonSize;
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90 }
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91 this.inner.style[this.orientation == "horizontal" ? "width" : "height"] =
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92 buttonSize + "px";
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93 this.setPos(this.pos, sizeChanged);
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94 };
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95
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96 function SimpleScrollbars(cls, place, scroll) {
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97 this.addClass = cls;
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98 this.horiz = new Bar(cls, "horizontal", scroll);
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99 place(this.horiz.node);
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100 this.vert = new Bar(cls, "vertical", scroll);
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101 place(this.vert.node);
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102 this.width = null;
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103 }
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104
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105 SimpleScrollbars.prototype.update = function(measure) {
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106 if (this.width == null) {
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107 var style = window.getComputedStyle ? window.getComputedStyle(this.horiz.node) : this.horiz.node.currentStyle;
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108 if (style) this.width = parseInt(style.height);
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109 }
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110 var width = this.width || 0;
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111
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112 var needsH = measure.scrollWidth > measure.clientWidth + 1;
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113 var needsV = measure.scrollHeight > measure.clientHeight + 1;
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114 this.vert.node.style.display = needsV ? "block" : "none";
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115 this.horiz.node.style.display = needsH ? "block" : "none";
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116
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117 if (needsV) {
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118 this.vert.update(measure.scrollHeight, measure.clientHeight,
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119 measure.viewHeight - (needsH ? width : 0));
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120 this.vert.node.style.bottom = needsH ? width + "px" : "0";
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121 }
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122 if (needsH) {
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123 this.horiz.update(measure.scrollWidth, measure.clientWidth,
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124 measure.viewWidth - (needsV ? width : 0) - measure.barLeft);
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125 this.horiz.node.style.right = needsV ? width + "px" : "0";
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126 this.horiz.node.style.left = measure.barLeft + "px";
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127 }
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128
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129 return {right: needsV ? width : 0, bottom: needsH ? width : 0};
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130 };
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131
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132 SimpleScrollbars.prototype.setScrollTop = function(pos) {
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133 this.vert.setPos(pos);
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134 };
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135
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136 SimpleScrollbars.prototype.setScrollLeft = function(pos) {
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137 this.horiz.setPos(pos);
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138 };
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139
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140 SimpleScrollbars.prototype.clear = function() {
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141 var parent = this.horiz.node.parentNode;
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142 parent.removeChild(this.horiz.node);
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143 parent.removeChild(this.vert.node);
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144 };
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145
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146 CodeMirror.scrollbarModel.simple = function(place, scroll) {
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147 return new SimpleScrollbars("CodeMirror-simplescroll", place, scroll);
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148 };
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149 CodeMirror.scrollbarModel.overlay = function(place, scroll) {
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150 return new SimpleScrollbars("CodeMirror-overlayscroll", place, scroll);
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151 };
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152 });
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