1 | // Copyright (c) Jupyter Development Team.
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2 | // Distributed under the terms of the Modified BSD License.
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3 | import { sessionContextDialogs } from '@jupyterlab/apputils';
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4 | import { PathExt } from '@jupyterlab/coreutils';
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5 | import { Context } from '@jupyterlab/docregistry';
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6 | import { nullTranslator } from '@jupyterlab/translation';
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7 | import { ArrayExt, find } from '@lumino/algorithm';
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8 | import { UUID } from '@lumino/coreutils';
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9 | import { AttachedProperty } from '@lumino/properties';
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10 | import { Signal } from '@lumino/signaling';
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11 | import { SaveHandler } from './savehandler';
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12 | import { DocumentWidgetManager } from './widgetmanager';
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13 | /**
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14 | * The document manager.
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15 | *
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16 | * #### Notes
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17 | * The document manager is used to register model and widget creators,
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18 | * and the file browser uses the document manager to create widgets. The
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19 | * document manager maintains a context for each path and model type that is
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20 | * open, and a list of widgets for each context. The document manager is in
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21 | * control of the proper closing and disposal of the widgets and contexts.
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22 | */
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23 | export class DocumentManager {
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24 | /**
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25 | * Construct a new document manager.
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26 | */
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27 | constructor(options) {
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28 | this._activateRequested = new Signal(this);
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29 | this._contexts = [];
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30 | this._isDisposed = false;
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31 | this._autosave = true;
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32 | this._autosaveInterval = 120;
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33 | this._lastModifiedCheckMargin = 500;
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34 | this.translator = options.translator || nullTranslator;
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35 | this.registry = options.registry;
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36 | this.services = options.manager;
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37 | this._collaborative = !!options.collaborative;
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38 | this._dialogs = options.sessionDialogs || sessionContextDialogs;
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39 | this._docProviderFactory = options.docProviderFactory;
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40 | this._opener = options.opener;
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41 | this._when = options.when || options.manager.ready;
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42 | const widgetManager = new DocumentWidgetManager({
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43 | registry: this.registry,
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44 | translator: this.translator
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45 | });
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46 | widgetManager.activateRequested.connect(this._onActivateRequested, this);
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47 | this._widgetManager = widgetManager;
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48 | this._setBusy = options.setBusy;
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49 | }
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50 | /**
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51 | * A signal emitted when one of the documents is activated.
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52 | */
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53 | get activateRequested() {
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54 | return this._activateRequested;
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55 | }
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56 | /**
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57 | * Whether to autosave documents.
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58 | */
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59 | get autosave() {
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60 | return this._autosave;
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61 | }
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62 | set autosave(value) {
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63 | this._autosave = value;
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64 | // For each existing context, start/stop the autosave handler as needed.
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65 | this._contexts.forEach(context => {
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66 | const handler = Private.saveHandlerProperty.get(context);
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67 | if (!handler) {
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68 | return;
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69 | }
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70 | if (value === true && !handler.isActive) {
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71 | handler.start();
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72 | }
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73 | else if (value === false && handler.isActive) {
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74 | handler.stop();
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75 | }
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76 | });
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77 | }
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78 | /**
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79 | * Determines the time interval for autosave in seconds.
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80 | */
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81 | get autosaveInterval() {
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82 | return this._autosaveInterval;
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83 | }
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84 | set autosaveInterval(value) {
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85 | this._autosaveInterval = value;
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86 | // For each existing context, set the save interval as needed.
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87 | this._contexts.forEach(context => {
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88 | const handler = Private.saveHandlerProperty.get(context);
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89 | if (!handler) {
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90 | return;
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91 | }
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92 | handler.saveInterval = value || 120;
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93 | });
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94 | }
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95 | /**
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96 | * Defines max acceptable difference, in milliseconds, between last modified timestamps on disk and client
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97 | */
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98 | get lastModifiedCheckMargin() {
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99 | return this._lastModifiedCheckMargin;
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100 | }
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101 | set lastModifiedCheckMargin(value) {
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102 | this._lastModifiedCheckMargin = value;
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103 | // For each existing context, update the margin value.
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104 | this._contexts.forEach(context => {
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105 | context.lastModifiedCheckMargin = value;
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106 | });
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107 | }
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108 | /**
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109 | * Get whether the document manager has been disposed.
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110 | */
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111 | get isDisposed() {
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112 | return this._isDisposed;
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113 | }
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114 | /**
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115 | * Dispose of the resources held by the document manager.
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116 | */
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117 | dispose() {
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118 | if (this.isDisposed) {
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119 | return;
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120 | }
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121 | this._isDisposed = true;
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122 | // Clear any listeners for our signals.
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123 | Signal.clearData(this);
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124 | // Close all the widgets for our contexts and dispose the widget manager.
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125 | this._contexts.forEach(context => {
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126 | return this._widgetManager.closeWidgets(context);
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127 | });
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128 | this._widgetManager.dispose();
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129 | // Clear the context list.
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130 | this._contexts.length = 0;
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131 | }
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132 | /**
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133 | * Clone a widget.
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134 | *
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135 | * @param widget - The source widget.
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136 | *
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137 | * @returns A new widget or `undefined`.
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138 | *
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139 | * #### Notes
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140 | * Uses the same widget factory and context as the source, or returns
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141 | * `undefined` if the source widget is not managed by this manager.
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142 | */
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143 | cloneWidget(widget) {
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144 | return this._widgetManager.cloneWidget(widget);
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145 | }
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146 | /**
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147 | * Close all of the open documents.
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148 | *
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149 | * @returns A promise resolving when the widgets are closed.
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150 | */
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151 | closeAll() {
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152 | return Promise.all(this._contexts.map(context => this._widgetManager.closeWidgets(context))).then(() => undefined);
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153 | }
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154 | /**
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155 | * Close the widgets associated with a given path.
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156 | *
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157 | * @param path - The target path.
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158 | *
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159 | * @returns A promise resolving when the widgets are closed.
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160 | */
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161 | closeFile(path) {
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162 | const close = this._contextsForPath(path).map(c => this._widgetManager.closeWidgets(c));
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163 | return Promise.all(close).then(x => undefined);
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164 | }
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165 | /**
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166 | * Get the document context for a widget.
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167 | *
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168 | * @param widget - The widget of interest.
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169 | *
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170 | * @returns The context associated with the widget, or `undefined` if no such
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171 | * context exists.
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172 | */
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173 | contextForWidget(widget) {
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174 | return this._widgetManager.contextForWidget(widget);
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175 | }
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176 | /**
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177 | * Copy a file.
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178 | *
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179 | * @param fromFile - The full path of the original file.
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180 | *
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181 | * @param toDir - The full path to the target directory.
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182 | *
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183 | * @returns A promise which resolves to the contents of the file.
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184 | */
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185 | copy(fromFile, toDir) {
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186 | return this.services.contents.copy(fromFile, toDir);
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187 | }
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188 | /**
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189 | * Create a new file and return the widget used to view it.
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190 | *
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191 | * @param path - The file path to create.
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192 | *
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193 | * @param widgetName - The name of the widget factory to use. 'default' will use the default widget.
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194 | *
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195 | * @param kernel - An optional kernel name/id to override the default.
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196 | *
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197 | * @returns The created widget, or `undefined`.
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198 | *
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199 | * #### Notes
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200 | * This function will return `undefined` if a valid widget factory
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201 | * cannot be found.
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202 | */
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203 | createNew(path, widgetName = 'default', kernel) {
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204 | return this._createOrOpenDocument('create', path, widgetName, kernel);
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205 | }
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206 | /**
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207 | * Delete a file.
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208 | *
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209 | * @param path - The full path to the file to be deleted.
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210 | *
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211 | * @returns A promise which resolves when the file is deleted.
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212 | *
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213 | * #### Notes
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214 | * If there is a running session associated with the file and no other
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215 | * sessions are using the kernel, the session will be shut down.
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216 | */
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217 | deleteFile(path) {
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218 | return this.services.sessions
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219 | .stopIfNeeded(path)
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220 | .then(() => {
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221 | return this.services.contents.delete(path);
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222 | })
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223 | .then(() => {
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224 | this._contextsForPath(path).forEach(context => this._widgetManager.deleteWidgets(context));
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225 | return Promise.resolve(void 0);
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226 | });
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227 | }
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228 | /**
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229 | * See if a widget already exists for the given path and widget name.
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230 | *
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231 | * @param path - The file path to use.
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232 | *
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233 | * @param widgetName - The name of the widget factory to use. 'default' will use the default widget.
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234 | *
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235 | * @returns The found widget, or `undefined`.
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236 | *
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237 | * #### Notes
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238 | * This can be used to find an existing widget instead of opening
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239 | * a new widget.
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240 | */
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241 | findWidget(path, widgetName = 'default') {
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242 | const newPath = PathExt.normalize(path);
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243 | let widgetNames = [widgetName];
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244 | if (widgetName === 'default') {
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245 | const factory = this.registry.defaultWidgetFactory(newPath);
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246 | if (!factory) {
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247 | return undefined;
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248 | }
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249 | widgetNames = [factory.name];
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250 | }
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251 | else if (widgetName === null) {
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252 | widgetNames = this.registry
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253 | .preferredWidgetFactories(newPath)
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254 | .map(f => f.name);
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255 | }
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256 | for (const context of this._contextsForPath(newPath)) {
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257 | for (const widgetName of widgetNames) {
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258 | if (widgetName !== null) {
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259 | const widget = this._widgetManager.findWidget(context, widgetName);
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260 | if (widget) {
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261 | return widget;
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262 | }
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263 | }
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264 | }
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265 | }
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266 | return undefined;
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267 | }
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268 | /**
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269 | * Create a new untitled file.
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270 | *
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271 | * @param options - The file content creation options.
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272 | */
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273 | newUntitled(options) {
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274 | if (options.type === 'file') {
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275 | options.ext = options.ext || '.txt';
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276 | }
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277 | return this.services.contents.newUntitled(options);
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278 | }
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279 | /**
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280 | * Open a file and return the widget used to view it.
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281 | *
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282 | * @param path - The file path to open.
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283 | *
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284 | * @param widgetName - The name of the widget factory to use. 'default' will use the default widget.
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285 | *
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286 | * @param kernel - An optional kernel name/id to override the default.
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287 | *
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288 | * @returns The created widget, or `undefined`.
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289 | *
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290 | * #### Notes
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291 | * This function will return `undefined` if a valid widget factory
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292 | * cannot be found.
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293 | */
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294 | open(path, widgetName = 'default', kernel, options) {
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295 | return this._createOrOpenDocument('open', path, widgetName, kernel, options);
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296 | }
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297 | /**
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298 | * Open a file and return the widget used to view it.
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299 | * Reveals an already existing editor.
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300 | *
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301 | * @param path - The file path to open.
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302 | *
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303 | * @param widgetName - The name of the widget factory to use. 'default' will use the default widget.
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304 | *
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305 | * @param kernel - An optional kernel name/id to override the default.
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306 | *
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307 | * @returns The created widget, or `undefined`.
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308 | *
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309 | * #### Notes
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310 | * This function will return `undefined` if a valid widget factory
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311 | * cannot be found.
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312 | */
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313 | openOrReveal(path, widgetName = 'default', kernel, options) {
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314 | const widget = this.findWidget(path, widgetName);
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315 | if (widget) {
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316 | this._opener.open(widget, options || {});
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317 | return widget;
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318 | }
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319 | return this.open(path, widgetName, kernel, options || {});
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320 | }
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321 | /**
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322 | * Overwrite a file.
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323 | *
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324 | * @param oldPath - The full path to the original file.
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325 | *
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326 | * @param newPath - The full path to the new file.
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327 | *
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328 | * @returns A promise containing the new file contents model.
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329 | */
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330 | overwrite(oldPath, newPath) {
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331 | // Cleanly overwrite the file by moving it, making sure the original does
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332 | // not exist, and then renaming to the new path.
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333 | const tempPath = `${newPath}.${UUID.uuid4()}`;
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334 | const cb = () => this.rename(tempPath, newPath);
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335 | return this.rename(oldPath, tempPath)
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336 | .then(() => {
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337 | return this.deleteFile(newPath);
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338 | })
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339 | .then(cb, cb);
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340 | }
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341 | /**
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342 | * Rename a file or directory.
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343 | *
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344 | * @param oldPath - The full path to the original file.
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345 | *
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346 | * @param newPath - The full path to the new file.
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347 | *
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348 | * @returns A promise containing the new file contents model. The promise
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349 | * will reject if the newPath already exists. Use [[overwrite]] to overwrite
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350 | * a file.
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351 | */
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352 | rename(oldPath, newPath) {
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353 | return this.services.contents.rename(oldPath, newPath);
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354 | }
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355 | /**
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356 | * Find a context for a given path and factory name.
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357 | */
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358 | _findContext(path, factoryName) {
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359 | const normalizedPath = this.services.contents.normalize(path);
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360 | return find(this._contexts, context => {
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361 | return (context.path === normalizedPath && context.factoryName === factoryName);
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362 | });
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363 | }
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364 | /**
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365 | * Get the contexts for a given path.
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366 | *
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367 | * #### Notes
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368 | * There may be more than one context for a given path if the path is open
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369 | * with multiple model factories (for example, a notebook can be open with a
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370 | * notebook model factory and a text model factory).
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371 | */
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372 | _contextsForPath(path) {
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373 | const normalizedPath = this.services.contents.normalize(path);
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374 | return this._contexts.filter(context => context.path === normalizedPath);
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375 | }
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376 | /**
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377 | * Create a context from a path and a model factory.
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378 | */
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379 | _createContext(path, factory, kernelPreference) {
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380 | // TODO: Make it impossible to open two different contexts for the same
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381 | // path. Or at least prompt the closing of all widgets associated with the
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382 | // old context before opening the new context. This will make things much
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383 | // more consistent for the users, at the cost of some confusion about what
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384 | // models are and why sometimes they cannot open the same file in different
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385 | // widgets that have different models.
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386 | // Allow options to be passed when adding a sibling.
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387 | const adopter = (widget, options) => {
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388 | this._widgetManager.adoptWidget(context, widget);
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389 | this._opener.open(widget, options);
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390 | };
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391 | const modelDBFactory = this.services.contents.getModelDBFactory(path) || undefined;
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392 | const context = new Context({
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393 | opener: adopter,
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394 | manager: this.services,
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395 | factory,
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396 | path,
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397 | kernelPreference,
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398 | modelDBFactory,
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399 | setBusy: this._setBusy,
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400 | sessionDialogs: this._dialogs,
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401 | collaborative: this._collaborative,
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402 | docProviderFactory: this._docProviderFactory,
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403 | lastModifiedCheckMargin: this._lastModifiedCheckMargin,
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404 | translator: this.translator
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405 | });
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406 | const handler = new SaveHandler({
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407 | context,
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408 | saveInterval: this.autosaveInterval
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409 | });
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410 | Private.saveHandlerProperty.set(context, handler);
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411 | void context.ready.then(() => {
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412 | if (this.autosave) {
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413 | handler.start();
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414 | }
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415 | });
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416 | context.disposed.connect(this._onContextDisposed, this);
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417 | this._contexts.push(context);
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418 | return context;
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419 | }
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420 | /**
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421 | * Handle a context disposal.
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422 | */
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423 | _onContextDisposed(context) {
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424 | ArrayExt.removeFirstOf(this._contexts, context);
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425 | }
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426 | /**
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427 | * Get the widget factory for a given widget name.
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428 | */
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429 | _widgetFactoryFor(path, widgetName) {
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430 | const { registry } = this;
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431 | if (widgetName === 'default') {
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432 | const factory = registry.defaultWidgetFactory(path);
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433 | if (!factory) {
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434 | return undefined;
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435 | }
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436 | widgetName = factory.name;
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437 | }
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438 | return registry.getWidgetFactory(widgetName);
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439 | }
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440 | /**
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441 | * Creates a new document, or loads one from disk, depending on the `which` argument.
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442 | * If `which==='create'`, then it creates a new document. If `which==='open'`,
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443 | * then it loads the document from disk.
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444 | *
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445 | * The two cases differ in how the document context is handled, but the creation
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446 | * of the widget and launching of the kernel are identical.
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447 | */
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448 | _createOrOpenDocument(which, path, widgetName = 'default', kernel, options) {
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449 | const widgetFactory = this._widgetFactoryFor(path, widgetName);
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450 | if (!widgetFactory) {
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451 | return undefined;
|
452 | }
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453 | const modelName = widgetFactory.modelName || 'text';
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454 | const factory = this.registry.getModelFactory(modelName);
|
455 | if (!factory) {
|
456 | return undefined;
|
457 | }
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458 | // Handle the kernel preference.
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459 | const preference = this.registry.getKernelPreference(path, widgetFactory.name, kernel);
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460 | let context;
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461 | let ready = Promise.resolve(undefined);
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462 | // Handle the load-from-disk case
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463 | if (which === 'open') {
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464 | // Use an existing context if available.
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465 | context = this._findContext(path, factory.name) || null;
|
466 | if (!context) {
|
467 | context = this._createContext(path, factory, preference);
|
468 | // Populate the model, either from disk or a
|
469 | // model backend.
|
470 | ready = this._when.then(() => context.initialize(false));
|
471 | }
|
472 | }
|
473 | else if (which === 'create') {
|
474 | context = this._createContext(path, factory, preference);
|
475 | // Immediately save the contents to disk.
|
476 | ready = this._when.then(() => context.initialize(true));
|
477 | }
|
478 | else {
|
479 | throw new Error(`Invalid argument 'which': ${which}`);
|
480 | }
|
481 | const widget = this._widgetManager.createWidget(widgetFactory, context);
|
482 | this._opener.open(widget, options || {});
|
483 | // If the initial opening of the context fails, dispose of the widget.
|
484 | ready.catch(err => {
|
485 | console.error(`Failed to initialize the context with '${factory.name}' for ${path}`, err);
|
486 | widget.close();
|
487 | });
|
488 | return widget;
|
489 | }
|
490 | /**
|
491 | * Handle an activateRequested signal from the widget manager.
|
492 | */
|
493 | _onActivateRequested(sender, args) {
|
494 | this._activateRequested.emit(args);
|
495 | }
|
496 | }
|
497 | /**
|
498 | * A namespace for private data.
|
499 | */
|
500 | var Private;
|
501 | (function (Private) {
|
502 | /**
|
503 | * An attached property for a context save handler.
|
504 | */
|
505 | Private.saveHandlerProperty = new AttachedProperty({
|
506 | name: 'saveHandler',
|
507 | create: () => undefined
|
508 | });
|
509 | })(Private || (Private = {}));
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510 | //# sourceMappingURL=manager.js.map |
\ | No newline at end of file |