1 | import { getNodeKeyForPreboot } from '../common/get-node-key';
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2 | /**
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3 | * Called right away to initialize preboot
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4 | *
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5 | * @param opts All the preboot options
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6 | * @param win
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7 | */
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8 | export function initAll(opts, win) {
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9 | const theWindow = (win || window);
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10 | // Add the preboot options to the preboot data and then add the data to
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11 | // the window so it can be used later by the client.
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12 | // Only set new options if they're not already set - we may have multiple app roots
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13 | // and each of them invokes the init function separately.
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14 | const data = (theWindow.prebootData = {
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15 | opts: opts,
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16 | apps: [],
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17 | listeners: []
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18 | });
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19 | return () => start(data, theWindow);
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20 | }
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21 | /**
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22 | * Start up preboot by going through each app and assigning the appropriate
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23 | * handlers. Normally this wouldn't be called directly, but we have set it up so
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24 | * that it can for older versions of Universal.
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25 | *
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26 | * @param prebootData Global preboot data object that contains options and will
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27 | * have events
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28 | * @param win Optional param to pass in mock window for testing purposes
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29 | */
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30 | export function start(prebootData, win) {
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31 | const theWindow = (win || window);
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32 | const _document = (theWindow.document || {});
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33 | // Remove the current script from the DOM so that child indexes match
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34 | // between the client & the server. The script is already running so it
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35 | // doesn't affect it.
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36 | const currentScript = _document.currentScript ||
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37 | // Support: IE 9-11 only
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38 | // IE doesn't support document.currentScript. Since the script is invoked
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39 | // synchronously, though, the current running script is just the last one
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40 | // currently in the document.
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41 | [].slice.call(_document.getElementsByTagName('script'), -1)[0];
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42 | if (!currentScript) {
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43 | console.error('Preboot initialization failed, no currentScript has been detected.');
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44 | return;
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45 | }
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46 | let serverNode = currentScript.parentNode;
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47 | if (!serverNode) {
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48 | console.error('Preboot initialization failed, the script is detached');
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49 | return;
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50 | }
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51 | serverNode.removeChild(currentScript);
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52 | const opts = prebootData.opts || {};
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53 | let eventSelectors = opts.eventSelectors || [];
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54 | // get the root info
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55 | const appRoot = prebootData.opts ? getAppRoot(_document, prebootData.opts, serverNode) : null;
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56 | // we track all events for each app in the prebootData object which is on
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57 | // the global scope; each `start` invocation adds data for one app only.
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58 | const appData = { root: appRoot, events: [] };
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59 | if (prebootData.apps) {
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60 | prebootData.apps.push(appData);
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61 | }
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62 | eventSelectors = eventSelectors.map(eventSelector => {
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63 | if (!eventSelector.hasOwnProperty('replay')) {
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64 | eventSelector.replay = true;
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65 | }
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66 | return eventSelector;
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67 | });
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68 | // loop through all the eventSelectors and create event handlers
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69 | eventSelectors.forEach(eventSelector => handleEvents(_document, prebootData, appData, eventSelector));
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70 | }
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71 | /**
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72 | * Create an overlay div and add it to the DOM so it can be used
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73 | * if a freeze event occurs
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74 | *
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75 | * @param _document The global document object (passed in for testing purposes)
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76 | * @returns Element The overlay node is returned
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77 | */
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78 | export function createOverlay(_document) {
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79 | let overlay = _document.createElement('div');
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80 | overlay.setAttribute('id', 'prebootOverlay');
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81 | overlay.setAttribute('style', 'display:none;position:absolute;left:0;' +
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82 | 'top:0;width:100%;height:100%;z-index:999999;background:black;opacity:.3');
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83 | _document.documentElement.appendChild(overlay);
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84 | return overlay;
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85 | }
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86 | /**
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87 | * Get references to the current app root node based on input options. Users can
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88 | * initialize preboot either by specifying appRoot which is just one or more
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89 | * selectors for apps. This section option is useful for people that are doing their own
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90 | * buffering (i.e. they have their own client and server view)
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91 | *
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92 | * @param _document The global document object used to attach the overlay
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93 | * @param opts Options passed in by the user to init()
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94 | * @param serverNode The server node serving as application root
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95 | * @returns ServerClientRoot An array of root info for the current app
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96 | */
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97 | export function getAppRoot(_document, opts, serverNode) {
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98 | const root = { serverNode };
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99 | // if we are doing buffering, we need to create the buffer for the client
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100 | // else the client root is the same as the server
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101 | root.clientNode = opts.buffer ? createBuffer(root) : root.serverNode;
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102 | // create an overlay if not disabled ,that can be used later if a freeze event occurs
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103 | if (!opts.disableOverlay) {
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104 | root.overlay = createOverlay(_document);
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105 | }
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106 | return root;
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107 | }
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108 | /**
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109 | * Under given server root, for given selector, record events
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110 | *
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111 | * @param _document
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112 | * @param prebootData
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113 | * @param appData
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114 | * @param eventSelector
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115 | */
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116 | export function handleEvents(_document, prebootData, appData, eventSelector) {
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117 | const serverRoot = appData.root.serverNode;
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118 | // don't do anything if no server root
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119 | if (!serverRoot) {
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120 | return;
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121 | }
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122 | // Attach delegated event listeners for each event selector.
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123 | // We need to use delegated events as only the top level server node
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124 | // exists at this point.
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125 | eventSelector.events.forEach((eventName) => {
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126 | // get the appropriate handler and add it as an event listener
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127 | const handler = createListenHandler(_document, prebootData, eventSelector, appData);
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128 | // attach the handler in the capture phase so that it fires even if
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129 | // one of the handlers below calls stopPropagation()
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130 | serverRoot.addEventListener(eventName, handler, true);
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131 | // need to keep track of listeners so we can do node.removeEventListener()
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132 | // when preboot done
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133 | if (prebootData.listeners) {
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134 | prebootData.listeners.push({
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135 | node: serverRoot,
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136 | eventName,
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137 | handler
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138 | });
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139 | }
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140 | });
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141 | }
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142 | /**
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143 | * Create handler for events that we will record
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144 | */
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145 | export function createListenHandler(_document, prebootData, eventSelector, appData) {
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146 | const CARET_EVENTS = ['keyup', 'keydown', 'focusin', 'mouseup', 'mousedown'];
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147 | const CARET_NODES = ['INPUT', 'TEXTAREA'];
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148 | // Support: IE 9-11 only
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149 | // IE uses a prefixed `matches` version
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150 | const matches = _document.documentElement.matches ||
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151 | _document.documentElement.msMatchesSelector;
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152 | const opts = prebootData.opts;
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153 | return function (event) {
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154 | const node = event.target;
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155 | // a delegated handlers on document is used so we need to check if
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156 | // event target matches a desired selector
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157 | if (!matches.call(node, eventSelector.selector)) {
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158 | return;
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159 | }
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160 | const root = appData.root;
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161 | const eventName = event.type;
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162 | // if no node or no event name, just return
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163 | if (!node || !eventName) {
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164 | return;
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165 | }
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166 | // if key codes set for eventSelector, then don't do anything if event
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167 | // doesn't include key
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168 | const keyCodes = eventSelector.keyCodes;
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169 | if (keyCodes && keyCodes.length) {
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170 | const matchingKeyCodes = keyCodes.filter(keyCode => event.which === keyCode);
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171 | // if there are not matches (i.e. key entered NOT one of the key codes)
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172 | // then don't do anything
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173 | if (!matchingKeyCodes.length) {
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174 | return;
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175 | }
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176 | }
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177 | // if for a given set of events we are preventing default, do that
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178 | if (eventSelector.preventDefault) {
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179 | event.preventDefault();
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180 | }
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181 | // if an action handler passed in, use that
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182 | if (eventSelector.action) {
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183 | eventSelector.action(node, event);
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184 | }
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185 | // get the node key for a given node
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186 | const nodeKey = getNodeKeyForPreboot({ root: root, node: node });
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187 | // record active node
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188 | if (CARET_EVENTS.indexOf(eventName) >= 0) {
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189 | // if it's an caret node, get the selection for the active node
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190 | const isCaretNode = CARET_NODES.indexOf(node.tagName ? node.tagName : '') >= 0;
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191 | prebootData.activeNode = {
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192 | root: root,
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193 | node: node,
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194 | nodeKey: nodeKey,
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195 | selection: isCaretNode ? getSelection(node) : undefined
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196 | };
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197 | }
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198 | else if (eventName !== 'change' && eventName !== 'focusout') {
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199 | prebootData.activeNode = undefined;
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200 | }
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201 | // if overlay is not disabled and we are freezing the UI
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202 | if (opts && !opts.disableOverlay && eventSelector.freeze) {
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203 | const overlay = root.overlay;
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204 | // show the overlay
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205 | overlay.style.display = 'block';
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206 | // hide the overlay after 10 seconds just in case preboot.complete() never
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207 | // called
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208 | setTimeout(() => {
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209 | overlay.style.display = 'none';
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210 | }, 10000);
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211 | }
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212 | // we will record events for later replay unless explicitly marked as
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213 | // doNotReplay
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214 | if (eventSelector.replay) {
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215 | appData.events.push({
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216 | node,
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217 | nodeKey,
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218 | event,
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219 | name: eventName
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220 | });
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221 | }
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222 | };
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223 | }
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224 | /**
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225 | * Get the selection data that is later used to set the cursor after client view
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226 | * is active
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227 | */
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228 | export function getSelection(node) {
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229 | node = node || {};
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230 | const nodeValue = node.value || '';
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231 | const selection = {
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232 | start: nodeValue.length,
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233 | end: nodeValue.length,
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234 | direction: 'forward'
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235 | };
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236 | // if browser support selectionStart on node (Chrome, FireFox, IE9+)
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237 | try {
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238 | if (node.selectionStart || node.selectionStart === 0) {
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239 | selection.start = node.selectionStart;
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240 | selection.end = node.selectionEnd ? node.selectionEnd : 0;
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241 | selection.direction = node.selectionDirection ?
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242 | node.selectionDirection : 'none';
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243 | }
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244 | }
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245 | catch (ex) { }
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246 | return selection;
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247 | }
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248 | /**
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249 | * Create buffer for a given node
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250 | *
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251 | * @param root All the data related to a particular app
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252 | * @returns Returns the root client node.
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253 | */
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254 | export function createBuffer(root) {
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255 | const serverNode = root.serverNode;
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256 | // if no rootServerNode OR the selector is on the entire html doc or the body
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257 | // OR no parentNode, don't buffer
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258 | if (!serverNode || !serverNode.parentNode ||
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259 | serverNode === document.documentElement || serverNode === document.body) {
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260 | return serverNode;
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261 | }
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262 | // create shallow clone of server root
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263 | const rootClientNode = serverNode.cloneNode(false);
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264 | // we want the client to write to a hidden div until the time for switching
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265 | // the buffers
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266 | rootClientNode.style.display = 'none';
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267 | // insert the client node before the server and return it
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268 | serverNode.parentNode.insertBefore(rootClientNode, serverNode);
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269 | // mark server node as not to be touched by AngularJS - needed for ngUpgrade
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270 | serverNode.setAttribute('ng-non-bindable', '');
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271 | // return the rootClientNode
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272 | return rootClientNode;
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273 | }
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {\n  EventSelector,\n  PrebootOptions,\n  PrebootAppData,\n  PrebootData,\n  DomEvent,\n  PrebootWindow,\n  ServerClientRoot,\n  PrebootSelection,\n  PrebootSelectionDirection,\n} from '../common/preboot.interfaces';\nimport {getNodeKeyForPreboot} from '../common/get-node-key';\n\n/**\n * Called right away to initialize preboot\n *\n * @param opts All the preboot options\n * @param win\n */\nexport function initAll(opts: PrebootOptions, win?: PrebootWindow) {\n  const theWindow = <PrebootWindow>(win || window);\n\n  // Add the preboot options to the preboot data and then add the data to\n  // the window so it can be used later by the client.\n  // Only set new options if they're not already set - we may have multiple app roots\n  // and each of them invokes the init function 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Normally this wouldn't be called directly, but we have set it up so\n * that it can for older versions of Universal.\n *\n * @param prebootData Global preboot data object that contains options and will\n * have events\n * @param win Optional param to pass in mock window for testing purposes\n */\nexport function start(prebootData: PrebootData, win?: PrebootWindow) {\n  const theWindow = <PrebootWindow>(win || window);\n  const _document = <Document>(theWindow.document || {});\n\n  // Remove the current script from the DOM so that child indexes match\n  // between the client & the server. The script is already running so it\n  // doesn't affect it.\n  const currentScript = _document.currentScript ||\n    // Support: IE 9-11 only\n    // IE doesn't support document.currentScript. Since the script is invoked\n    // synchronously, though, the current running script is just the last one\n    // currently in the document.\n    [].slice.call(_document.getElementsByTagName('script'), -1)[0];\n\n  if (!currentScript) {\n    console.error('Preboot initialization failed, no currentScript has been detected.');\n    return;\n  }\n\n  let serverNode = currentScript.parentNode;\n  if (!serverNode) {\n    console.error('Preboot initialization failed, the script is detached');\n    return;\n  }\n\n  serverNode.removeChild(currentScript);\n\n  const opts = prebootData.opts || ({} as PrebootOptions);\n  let eventSelectors = opts.eventSelectors || [];\n\n  // get the root info\n  const appRoot = prebootData.opts ? getAppRoot(_document, prebootData.opts, serverNode) : null;\n\n  // we track all events for each app in the prebootData object which is on\n  // the global scope; each `start` invocation adds data for one app only.\n  const appData = <PrebootAppData>{ root: appRoot, events: [] };\n  if (prebootData.apps) {\n    prebootData.apps.push(appData);\n  }\n\n  eventSelectors = eventSelectors.map(eventSelector => {\n    if (!eventSelector.hasOwnProperty('replay')) {\n      eventSelector.replay = true;\n    }\n    return eventSelector;\n  });\n\n  // loop through all the eventSelectors and create event handlers\n  eventSelectors.forEach(eventSelector =>\n    handleEvents(_document, prebootData, appData, eventSelector));\n}\n\n/**\n * Create an overlay div and add it to the DOM so it can be used\n * if a freeze event occurs\n *\n * @param _document The global document object (passed in for testing purposes)\n * @returns Element The overlay node is returned\n */\nexport function createOverlay(_document: Document): HTMLElement | undefined {\n  let overlay = _document.createElement('div');\n  overlay.setAttribute('id', 'prebootOverlay');\n  overlay.setAttribute(\n    'style',\n    'display:none;position:absolute;left:0;' +\n    'top:0;width:100%;height:100%;z-index:999999;background:black;opacity:.3'\n  );\n  _document.documentElement.appendChild(overlay);\n\n  return overlay;\n}\n\n/**\n * Get references to the current app root node based on input options. Users can\n * initialize preboot either by specifying appRoot which is just one or more\n * selectors for apps. This section option is useful for people that are doing their own\n * buffering (i.e. they have their own client and server view)\n *\n * @param _document The global document object used to attach the overlay\n * @param opts Options passed in by the user to init()\n * @param serverNode The server node serving as application root\n * @returns ServerClientRoot An array of root info for the current app\n */\nexport function getAppRoot(\n  _document: Document,\n  opts: PrebootOptions,\n  serverNode: HTMLElement\n): ServerClientRoot {\n  const root: ServerClientRoot = {serverNode};\n\n  // if we are doing buffering, we need to create the buffer for the client\n  // else the client root is the same as the server\n  root.clientNode = opts.buffer ? createBuffer(root) : root.serverNode;\n\n  // create an overlay if not disabled ,that can be used later if a freeze event occurs\n  if (!opts.disableOverlay) {\n    root.overlay = createOverlay(_document);\n  }\n\n  return root;\n}\n\n/**\n * Under given server root, for given selector, record events\n *\n * @param _document\n * @param prebootData\n * @param appData\n * @param eventSelector\n */\nexport function handleEvents(_document: Document,\n                             prebootData: PrebootData,\n                             appData: PrebootAppData,\n                             eventSelector: EventSelector) {\n  const serverRoot = appData.root.serverNode;\n\n  // don't do anything if no server root\n  if (!serverRoot) {\n    return;\n  }\n\n  // Attach delegated event listeners for each event selector.\n  // We need to use delegated events as only the top level server node\n  // exists at this point.\n  eventSelector.events.forEach((eventName: string) => {\n    // get the appropriate handler and add it as an event listener\n    const handler = createListenHandler(_document, prebootData, eventSelector, appData);\n    // attach the handler in the capture phase so that it fires even if\n    // one of the handlers below calls stopPropagation()\n    serverRoot.addEventListener(eventName, handler, true);\n\n    // need to keep track of listeners so we can do node.removeEventListener()\n    // when preboot done\n    if (prebootData.listeners) {\n      prebootData.listeners.push({\n        node: serverRoot,\n        eventName,\n        handler\n      });\n    }\n  });\n}\n\n/**\n * Create handler for events that we will record\n */\nexport function createListenHandler(\n  _document: Document,\n  prebootData: PrebootData,\n  eventSelector: EventSelector,\n  appData: PrebootAppData\n): EventListener {\n  const CARET_EVENTS = ['keyup', 'keydown', 'focusin', 'mouseup', 'mousedown'];\n  const CARET_NODES = ['INPUT', 'TEXTAREA'];\n\n  // Support: IE 9-11 only\n  // IE uses a prefixed `matches` version\n  const matches = _document.documentElement.matches ||\n    (_document.documentElement as any).msMatchesSelector;\n  const opts = prebootData.opts;\n\n  return function(event: DomEvent) {\n    const node: Element = event.target;\n\n    // a delegated handlers on document is used so we need to check if\n    // event target matches a desired selector\n    if (!matches.call(node, eventSelector.selector)) {\n      return;\n    }\n\n    const root = appData.root;\n    const eventName = event.type;\n\n    // if no node or no event name, just return\n    if (!node || !eventName) {\n      return;\n    }\n\n    // if key codes set for eventSelector, then don't do anything if event\n    // doesn't include key\n    const keyCodes = eventSelector.keyCodes;\n    if (keyCodes && keyCodes.length) {\n      const matchingKeyCodes = keyCodes.filter(keyCode => event.which === keyCode);\n\n      // if there are not matches (i.e. key entered NOT one of the key codes)\n      // then don't do anything\n      if (!matchingKeyCodes.length) {\n        return;\n      }\n    }\n\n    // if for a given set of events we are preventing default, do that\n    if (eventSelector.preventDefault) {\n      event.preventDefault();\n    }\n\n    // if an action handler passed in, use that\n    if (eventSelector.action) {\n      eventSelector.action(node, event);\n    }\n\n    // get the node key for a given node\n    const nodeKey = getNodeKeyForPreboot({ root: root, node: node });\n\n    // record active node\n    if (CARET_EVENTS.indexOf(eventName) >= 0) {\n      // if it's an caret node, get the selection for the active node\n      const isCaretNode = CARET_NODES.indexOf(node.tagName ? node.tagName : '') >= 0;\n\n      prebootData.activeNode = {\n        root: root,\n        node: node,\n        nodeKey: nodeKey,\n        selection: isCaretNode ? getSelection(node as HTMLInputElement) : undefined\n      };\n    } else if (eventName !== 'change' && eventName !== 'focusout') {\n      prebootData.activeNode = undefined;\n    }\n\n    // if overlay is not disabled and we are freezing the UI\n    if (opts && !opts.disableOverlay && eventSelector.freeze) {\n      const overlay = root.overlay as HTMLElement;\n\n      // show the overlay\n      overlay.style.display = 'block';\n\n      // hide the overlay after 10 seconds just in case preboot.complete() never\n      // called\n      setTimeout(() => {\n        overlay.style.display = 'none';\n      }, 10000);\n    }\n\n    // we will record events for later replay unless explicitly marked as\n    // doNotReplay\n    if (eventSelector.replay) {\n      appData.events.push({\n        node,\n        nodeKey,\n        event,\n        name: eventName\n      });\n    }\n  };\n}\n\n/**\n * Get the selection data that is later used to set the cursor after client view\n * is active\n */\nexport function getSelection(node: HTMLInputElement): PrebootSelection {\n  node = node || {} as HTMLInputElement;\n\n  const nodeValue = node.value || '';\n  const selection: PrebootSelection = {\n    start: nodeValue.length,\n    end: nodeValue.length,\n    direction: 'forward'\n  };\n\n  // if browser support selectionStart on node (Chrome, FireFox, IE9+)\n  try {\n    if (node.selectionStart || node.selectionStart === 0) {\n      selection.start = node.selectionStart;\n      selection.end = node.selectionEnd ? node.selectionEnd : 0;\n      selection.direction = node.selectionDirection ?\n        node.selectionDirection as PrebootSelectionDirection : 'none';\n    }\n  } catch (ex) {}\n\n  return selection;\n}\n\n/**\n * Create buffer for a given node\n *\n * @param root All the data related to a particular app\n * @returns Returns the root client node.\n */\nexport function createBuffer(root: ServerClientRoot): HTMLElement {\n  const serverNode = root.serverNode;\n\n  // if no rootServerNode OR the selector is on the entire html doc or the body\n  // OR no parentNode, don't buffer\n  if (!serverNode || !serverNode.parentNode ||\n    serverNode === document.documentElement || serverNode === document.body) {\n    return serverNode as HTMLElement;\n  }\n\n  // create shallow clone of server root\n  const rootClientNode = serverNode.cloneNode(false) as HTMLElement;\n  // we want the client to write to a hidden div until the time for switching\n  // the buffers\n  rootClientNode.style.display = 'none';\n\n  // insert the client node before the server and return it\n  serverNode.parentNode.insertBefore(rootClientNode, serverNode);\n\n  // mark server node as not to be touched by AngularJS - needed for ngUpgrade\n  serverNode.setAttribute('ng-non-bindable', '');\n\n  // return the rootClientNode\n  return rootClientNode;\n}\n"]} |
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