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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 CodeMirror.defineExtension("addPanel", function (node, options) {
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13 options = options || {};
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14
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15 if (!this.state.panels) initPanels(this);
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16
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17 var info = this.state.panels;
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18 var wrapper = info.wrapper;
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19 var cmWrapper = this.getWrapperElement();
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20 var replace = options.replace instanceof Panel && !options.replace.cleared;
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21
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22 if (options.after instanceof Panel && !options.after.cleared) {
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23 wrapper.insertBefore(node, options.before.node.nextSibling);
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24 } else if (options.before instanceof Panel && !options.before.cleared) {
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25 wrapper.insertBefore(node, options.before.node);
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26 } else if (replace) {
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27 wrapper.insertBefore(node, options.replace.node);
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28 options.replace.clear(true);
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29 } else if (options.position == "bottom") {
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30 wrapper.appendChild(node);
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31 } else if (options.position == "before-bottom") {
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32 wrapper.insertBefore(node, cmWrapper.nextSibling);
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33 } else if (options.position == "after-top") {
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34 wrapper.insertBefore(node, cmWrapper);
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35 } else {
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36 wrapper.insertBefore(node, wrapper.firstChild);
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37 }
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38
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39 var height = (options && options.height) || node.offsetHeight;
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40
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41 var panel = new Panel(this, node, options, height);
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42 info.panels.push(panel);
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43
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44 this.setSize();
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45 if (options.stable && isAtTop(this, node))
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46 this.scrollTo(null, this.getScrollInfo().top + height);
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47
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48 return panel;
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49 });
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50
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51 function Panel(cm, node, options, height) {
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52 this.cm = cm;
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53 this.node = node;
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54 this.options = options;
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55 this.height = height;
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56 this.cleared = false;
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57 }
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58
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59 /* when skipRemove is true, clear() was called from addPanel().
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60 * Thus removePanels() should not be called (issue 5518) */
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61 Panel.prototype.clear = function (skipRemove) {
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62 if (this.cleared) return;
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63 this.cleared = true;
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64 var info = this.cm.state.panels;
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65 info.panels.splice(info.panels.indexOf(this), 1);
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66 this.cm.setSize();
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67 if (this.options.stable && isAtTop(this.cm, this.node))
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68 this.cm.scrollTo(null, this.cm.getScrollInfo().top - this.height)
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69 info.wrapper.removeChild(this.node);
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70 if (info.panels.length == 0 && !skipRemove) removePanels(this.cm);
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71 };
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72
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73 Panel.prototype.changed = function () {
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74 this.height = this.node.getBoundingClientRect().height;
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75 this.cm.setSize();
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76 };
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77
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78 function initPanels(cm) {
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79 var wrap = cm.getWrapperElement()
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80 var style = window.getComputedStyle ? window.getComputedStyle(wrap) : wrap.currentStyle;
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81 var height = parseInt(style.height);
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82 var info = cm.state.panels = {
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83 setHeight: wrap.style.height,
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84 panels: [],
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85 wrapper: document.createElement("div")
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86 };
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87 var hasFocus = cm.hasFocus(), scrollPos = cm.getScrollInfo()
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88 wrap.parentNode.insertBefore(info.wrapper, wrap);
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89 info.wrapper.appendChild(wrap);
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90 cm.scrollTo(scrollPos.left, scrollPos.top)
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91 if (hasFocus) cm.focus();
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92
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93 cm._setSize = cm.setSize;
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94 if (height != null) cm.setSize = function (width, newHeight) {
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95 if (!newHeight) newHeight = info.wrapper.offsetHeight;
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96 info.setHeight = newHeight;
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97 if (typeof newHeight != "number") {
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98 var px = /^(\d+\.?\d*)px$/.exec(newHeight);
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99 if (px) {
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100 newHeight = Number(px[1]);
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101 } else {
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102 info.wrapper.style.height = newHeight;
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103 newHeight = info.wrapper.offsetHeight;
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104 }
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105 }
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106 var editorheight = newHeight - info.panels
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107 .map(function (p) { return p.node.getBoundingClientRect().height; })
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108 .reduce(function (a, b) { return a + b; }, 0);
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109 cm._setSize(width, editorheight);
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110 height = newHeight;
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111 };
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112 }
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113
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114 function removePanels(cm) {
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115 var info = cm.state.panels;
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116 cm.state.panels = null;
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117
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118 var wrap = cm.getWrapperElement()
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119 var hasFocus = cm.hasFocus(), scrollPos = cm.getScrollInfo()
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120 info.wrapper.parentNode.replaceChild(wrap, info.wrapper);
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121 cm.scrollTo(scrollPos.left, scrollPos.top)
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122 if (hasFocus) cm.focus();
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123 wrap.style.height = info.setHeight;
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124 cm.setSize = cm._setSize;
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125 cm.setSize();
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126 }
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127
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128 function isAtTop(cm, dom) {
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129 for (var sibling = dom.nextSibling; sibling; sibling = sibling.nextSibling)
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130 if (sibling == cm.getWrapperElement()) return true
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131 return false
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132 }
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133 });
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