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16 |
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17 | const fs = require('fs');
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18 | const EventEmitter = require('events');
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19 | const {helper} = require('./helper');
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20 | const {ExecutionContext, JSHandle} = require('./ExecutionContext');
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21 | const ElementHandle = require('./ElementHandle');
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22 |
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23 | const readFileAsync = helper.promisify(fs.readFile);
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24 |
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25 | class FrameManager extends EventEmitter {
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26 | |
27 |
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28 |
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29 |
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30 |
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31 | constructor(client, frameTree, page) {
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32 | super();
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33 | this._client = client;
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34 | this._page = page;
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35 |
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36 | this._frames = new Map();
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37 |
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38 | this._contextIdToContext = new Map();
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39 |
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40 | this._client.on('Page.frameAttached', event => this._onFrameAttached(event.frameId, event.parentFrameId));
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41 | this._client.on('Page.frameNavigated', event => this._onFrameNavigated(event.frame));
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42 | this._client.on('Page.navigatedWithinDocument', event => this._onFrameNavigatedWithinDocument(event.frameId, event.url));
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43 | this._client.on('Page.frameDetached', event => this._onFrameDetached(event.frameId));
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44 | this._client.on('Page.frameStoppedLoading', event => this._onFrameStoppedLoading(event.frameId));
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45 | this._client.on('Runtime.executionContextCreated', event => this._onExecutionContextCreated(event.context));
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46 | this._client.on('Runtime.executionContextDestroyed', event => this._onExecutionContextDestroyed(event.executionContextId));
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47 | this._client.on('Runtime.executionContextsCleared', event => this._onExecutionContextsCleared());
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48 | this._client.on('Page.lifecycleEvent', event => this._onLifecycleEvent(event));
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49 |
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50 | this._handleFrameTree(frameTree);
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51 | }
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52 |
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53 | |
54 |
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55 |
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56 | _onLifecycleEvent(event) {
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57 | const frame = this._frames.get(event.frameId);
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58 | if (!frame)
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59 | return;
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60 | frame._onLifecycleEvent(event.loaderId, event.name);
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61 | this.emit(FrameManager.Events.LifecycleEvent, frame);
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62 | }
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63 |
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64 | |
65 |
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66 |
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67 | _onFrameStoppedLoading(frameId) {
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68 | const frame = this._frames.get(frameId);
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69 | if (!frame)
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70 | return;
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71 | frame._onLoadingStopped();
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72 | this.emit(FrameManager.Events.LifecycleEvent, frame);
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73 | }
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74 |
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75 | |
76 |
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77 |
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78 | _handleFrameTree(frameTree) {
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79 | if (frameTree.frame.parentId)
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80 | this._onFrameAttached(frameTree.frame.id, frameTree.frame.parentId);
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81 | this._onFrameNavigated(frameTree.frame);
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82 | if (!frameTree.childFrames)
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83 | return;
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84 |
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85 | for (const child of frameTree.childFrames)
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86 | this._handleFrameTree(child);
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87 | }
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88 |
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89 | |
90 |
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91 |
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92 | mainFrame() {
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93 | return this._mainFrame;
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94 | }
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95 |
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96 | |
97 |
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98 |
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99 | frames() {
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100 | return Array.from(this._frames.values());
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101 | }
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102 |
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103 | |
104 |
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105 |
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106 |
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107 | frame(frameId) {
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108 | return this._frames.get(frameId) || null;
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109 | }
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110 |
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111 | |
112 |
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113 |
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114 |
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115 |
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116 | _onFrameAttached(frameId, parentFrameId) {
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117 | if (this._frames.has(frameId))
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118 | return;
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119 | console.assert(parentFrameId);
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120 | const parentFrame = this._frames.get(parentFrameId);
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121 | const frame = new Frame(this._client, this._page, parentFrame, frameId);
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122 | this._frames.set(frame._id, frame);
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123 | this.emit(FrameManager.Events.FrameAttached, frame);
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124 | }
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125 |
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126 | |
127 |
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128 |
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129 | _onFrameNavigated(framePayload) {
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130 | const isMainFrame = !framePayload.parentId;
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131 | let frame = isMainFrame ? this._mainFrame : this._frames.get(framePayload.id);
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132 | console.assert(isMainFrame || frame, 'We either navigate top level or have old version of the navigated frame');
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133 |
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134 |
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135 | if (frame) {
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136 | for (const child of frame.childFrames())
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137 | this._removeFramesRecursively(child);
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138 | }
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139 |
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140 |
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141 | if (isMainFrame) {
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142 | if (frame) {
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143 |
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144 | this._frames.delete(frame._id);
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145 | frame._id = framePayload.id;
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146 | } else {
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147 |
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148 | frame = new Frame(this._client, this._page, null, framePayload.id);
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149 | }
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150 | this._frames.set(framePayload.id, frame);
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151 | this._mainFrame = frame;
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152 | }
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153 |
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154 |
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155 | frame._navigated(framePayload);
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156 |
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157 | this.emit(FrameManager.Events.FrameNavigated, frame);
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158 | }
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159 |
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160 | |
161 |
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162 |
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163 |
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164 | _onFrameNavigatedWithinDocument(frameId, url) {
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165 | const frame = this._frames.get(frameId);
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166 | if (!frame)
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167 | return;
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168 | frame._navigatedWithinDocument(url);
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169 | this.emit(FrameManager.Events.FrameNavigatedWithinDocument, frame);
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170 | this.emit(FrameManager.Events.FrameNavigated, frame);
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171 | }
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172 |
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173 | |
174 |
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175 |
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176 | _onFrameDetached(frameId) {
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177 | const frame = this._frames.get(frameId);
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178 | if (frame)
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179 | this._removeFramesRecursively(frame);
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180 | }
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181 |
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182 | _onExecutionContextCreated(contextPayload) {
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183 | const frameId = contextPayload.auxData && contextPayload.auxData.isDefault ? contextPayload.auxData.frameId : null;
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184 | const frame = frameId ? this._frames.get(frameId) : null;
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185 | const context = new ExecutionContext(this._client, contextPayload, this.createJSHandle.bind(this, contextPayload.id), frame);
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186 | this._contextIdToContext.set(contextPayload.id, context);
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187 | if (frame)
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188 | frame._setDefaultContext(context);
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189 | }
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190 |
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191 | |
192 |
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193 |
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194 | _removeContext(context) {
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195 | if (context.frame())
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196 | context.frame()._setDefaultContext(null);
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197 | }
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198 |
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199 | |
200 |
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201 |
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202 | _onExecutionContextDestroyed(executionContextId) {
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203 | const context = this._contextIdToContext.get(executionContextId);
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204 | if (!context)
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205 | return;
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206 | this._contextIdToContext.delete(executionContextId);
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207 | this._removeContext(context);
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208 | }
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209 |
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210 | _onExecutionContextsCleared() {
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211 | for (const context of this._contextIdToContext.values())
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212 | this._removeContext(context);
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213 | this._contextIdToContext.clear();
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214 | }
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215 |
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216 | |
217 |
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218 |
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219 |
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220 |
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221 | createJSHandle(contextId, remoteObject) {
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222 | const context = this._contextIdToContext.get(contextId);
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223 | console.assert(context, 'INTERNAL ERROR: missing context with id = ' + contextId);
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224 | if (remoteObject.subtype === 'node')
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225 | return new ElementHandle(context, this._client, remoteObject, this._page, this);
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226 | return new JSHandle(context, this._client, remoteObject);
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227 | }
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228 |
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229 | |
230 |
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231 |
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232 | _removeFramesRecursively(frame) {
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233 | for (const child of frame.childFrames())
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234 | this._removeFramesRecursively(child);
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235 | frame._detach();
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236 | this._frames.delete(frame._id);
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237 | this.emit(FrameManager.Events.FrameDetached, frame);
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238 | }
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239 | }
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240 |
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241 |
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242 | FrameManager.Events = {
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243 | FrameAttached: 'frameattached',
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244 | FrameNavigated: 'framenavigated',
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245 | FrameDetached: 'framedetached',
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246 | LifecycleEvent: 'lifecycleevent',
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247 | FrameNavigatedWithinDocument: 'framenavigatedwithindocument'
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248 | };
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249 |
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250 |
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251 |
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252 |
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253 | class Frame {
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254 | |
255 |
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256 |
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257 |
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258 |
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259 | constructor(client, page, parentFrame, frameId) {
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260 | this._client = client;
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261 | this._page = page;
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262 | this._parentFrame = parentFrame;
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263 | this._url = '';
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264 | this._id = frameId;
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265 |
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266 |
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267 | this._documentPromise = null;
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268 |
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269 | this._contextPromise = null;
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270 | this._contextResolveCallback = null;
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271 | this._setDefaultContext(null);
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272 |
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273 |
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274 | this._waitTasks = new Set();
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275 | this._loaderId = '';
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276 |
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277 | this._lifecycleEvents = new Set();
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278 |
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279 |
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280 | this._childFrames = new Set();
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281 | if (this._parentFrame)
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282 | this._parentFrame._childFrames.add(this);
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283 | }
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284 |
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285 | |
286 |
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287 |
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288 | _setDefaultContext(context) {
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289 | if (context) {
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290 | this._contextResolveCallback.call(null, context);
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291 | this._contextResolveCallback = null;
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292 | for (const waitTask of this._waitTasks)
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293 | waitTask.rerun();
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294 | } else {
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295 | this._documentPromise = null;
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296 | this._contextPromise = new Promise(fulfill => {
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297 | this._contextResolveCallback = fulfill;
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298 | });
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299 | }
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300 | }
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301 |
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302 | |
303 |
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304 |
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305 | executionContext() {
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306 | return this._contextPromise;
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307 | }
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308 |
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309 | |
310 |
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311 |
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312 |
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313 |
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314 | async evaluateHandle(pageFunction, ...args) {
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315 | const context = await this._contextPromise;
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316 | return context.evaluateHandle(pageFunction, ...args);
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317 | }
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318 |
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319 | |
320 |
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321 |
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322 |
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323 |
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324 | async evaluate(pageFunction, ...args) {
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325 | const context = await this._contextPromise;
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326 | return context.evaluate(pageFunction, ...args);
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327 | }
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328 |
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329 | |
330 |
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331 |
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332 |
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333 | async $(selector) {
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334 | const document = await this._document();
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335 | const value = await document.$(selector);
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336 | return value;
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337 | }
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338 |
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339 | |
340 |
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341 |
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342 | async _document() {
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343 | if (this._documentPromise)
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344 | return this._documentPromise;
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345 | this._documentPromise = this._contextPromise.then(async context => {
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346 | const document = await context.evaluateHandle('document');
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347 | return document.asElement();
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348 | });
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349 | return this._documentPromise;
|
350 | }
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351 |
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352 | |
353 |
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354 |
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355 |
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356 | async $x(expression) {
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357 | const document = await this._document();
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358 | const value = await document.$x(expression);
|
359 | return value;
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360 | }
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361 |
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362 | |
363 |
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364 |
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365 |
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366 |
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367 |
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368 | async $eval(selector, pageFunction, ...args) {
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369 | const elementHandle = await this.$(selector);
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370 | if (!elementHandle)
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371 | throw new Error(`Error: failed to find element matching selector "${selector}"`);
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372 | const result = await this.evaluate(pageFunction, elementHandle, ...args);
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373 | await elementHandle.dispose();
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374 | return result;
|
375 | }
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376 |
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377 | |
378 |
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379 |
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380 |
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381 |
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382 |
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383 | async $$eval(selector, pageFunction, ...args) {
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384 | const context = await this._contextPromise;
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385 | const arrayHandle = await context.evaluateHandle(selector => Array.from(document.querySelectorAll(selector)), selector);
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386 | const result = await this.evaluate(pageFunction, arrayHandle, ...args);
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387 | await arrayHandle.dispose();
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388 | return result;
|
389 | }
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390 |
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391 | |
392 |
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393 |
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394 |
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395 | async $$(selector) {
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396 | const document = await this._document();
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397 | const value = await document.$$(selector);
|
398 | return value;
|
399 | }
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400 |
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401 | |
402 |
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403 |
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404 | async content() {
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405 | return await this.evaluate(() => {
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406 | let retVal = '';
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407 | if (document.doctype)
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408 | retVal = new XMLSerializer().serializeToString(document.doctype);
|
409 | if (document.documentElement)
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410 | retVal += document.documentElement.outerHTML;
|
411 | return retVal;
|
412 | });
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413 | }
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414 |
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415 | |
416 |
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417 |
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418 | async setContent(html) {
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419 | await this.evaluate(html => {
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420 | document.open();
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421 | document.write(html);
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422 | document.close();
|
423 | }, html);
|
424 | }
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425 |
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426 | |
427 |
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428 |
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429 | name() {
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430 | return this._name || '';
|
431 | }
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432 |
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433 | |
434 |
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435 |
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436 | url() {
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437 | return this._url;
|
438 | }
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439 |
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440 | |
441 |
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442 |
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443 | parentFrame() {
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444 | return this._parentFrame;
|
445 | }
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446 |
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447 | |
448 |
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449 |
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450 | childFrames() {
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451 | return Array.from(this._childFrames);
|
452 | }
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453 |
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454 | |
455 |
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456 |
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457 | isDetached() {
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458 | return this._detached;
|
459 | }
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460 |
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461 | |
462 |
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463 |
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464 |
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465 | async addScriptTag(options) {
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466 | if (typeof options.url === 'string') {
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467 | const url = options.url;
|
468 | try {
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469 | const context = await this._contextPromise;
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470 | return (await context.evaluateHandle(addScriptUrl, url, options.type)).asElement();
|
471 | } catch (error) {
|
472 | throw new Error(`Loading script from ${url} failed`);
|
473 | }
|
474 | }
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475 |
|
476 | if (typeof options.path === 'string') {
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477 | let contents = await readFileAsync(options.path, 'utf8');
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478 | contents += '//# sourceURL=' + options.path.replace(/\n/g, '');
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479 | const context = await this._contextPromise;
|
480 | return (await context.evaluateHandle(addScriptContent, contents, options.type)).asElement();
|
481 | }
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482 |
|
483 | if (typeof options.content === 'string') {
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484 | const context = await this._contextPromise;
|
485 | return (await context.evaluateHandle(addScriptContent, options.content, options.type)).asElement();
|
486 | }
|
487 |
|
488 | throw new Error('Provide an object with a `url`, `path` or `content` property');
|
489 |
|
490 | |
491 |
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492 |
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493 |
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494 |
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495 | async function addScriptUrl(url, type) {
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496 | const script = document.createElement('script');
|
497 | script.src = url;
|
498 | if (type)
|
499 | script.type = type;
|
500 | const promise = new Promise((res, rej) => {
|
501 | script.onload = res;
|
502 | script.onerror = rej;
|
503 | });
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504 | document.head.appendChild(script);
|
505 | await promise;
|
506 | return script;
|
507 | }
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508 |
|
509 | |
510 |
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511 |
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512 |
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513 |
|
514 | function addScriptContent(content, type = 'text/javascript') {
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515 | const script = document.createElement('script');
|
516 | script.type = type;
|
517 | script.text = content;
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518 | let error = null;
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519 | script.onerror = e => error = e;
|
520 | document.head.appendChild(script);
|
521 | if (error)
|
522 | throw error;
|
523 | return script;
|
524 | }
|
525 | }
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526 |
|
527 | |
528 |
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529 |
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530 |
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531 | async addStyleTag(options) {
|
532 | if (typeof options.url === 'string') {
|
533 | const url = options.url;
|
534 | try {
|
535 | const context = await this._contextPromise;
|
536 | return (await context.evaluateHandle(addStyleUrl, url)).asElement();
|
537 | } catch (error) {
|
538 | throw new Error(`Loading style from ${url} failed`);
|
539 | }
|
540 | }
|
541 |
|
542 | if (typeof options.path === 'string') {
|
543 | let contents = await readFileAsync(options.path, 'utf8');
|
544 | contents += '/*# sourceURL=' + options.path.replace(/\n/g, '') + '*/';
|
545 | const context = await this._contextPromise;
|
546 | return (await context.evaluateHandle(addStyleContent, contents)).asElement();
|
547 | }
|
548 |
|
549 | if (typeof options.content === 'string') {
|
550 | const context = await this._contextPromise;
|
551 | return (await context.evaluateHandle(addStyleContent, options.content)).asElement();
|
552 | }
|
553 |
|
554 | throw new Error('Provide an object with a `url`, `path` or `content` property');
|
555 |
|
556 | |
557 |
|
558 |
|
559 |
|
560 | async function addStyleUrl(url) {
|
561 | const link = document.createElement('link');
|
562 | link.rel = 'stylesheet';
|
563 | link.href = url;
|
564 | const promise = new Promise((res, rej) => {
|
565 | link.onload = res;
|
566 | link.onerror = rej;
|
567 | });
|
568 | document.head.appendChild(link);
|
569 | await promise;
|
570 | return link;
|
571 | }
|
572 |
|
573 | |
574 |
|
575 |
|
576 |
|
577 | async function addStyleContent(content) {
|
578 | const style = document.createElement('style');
|
579 | style.type = 'text/css';
|
580 | style.appendChild(document.createTextNode(content));
|
581 | const promise = new Promise((res, rej) => {
|
582 | style.onload = res;
|
583 | style.onerror = rej;
|
584 | });
|
585 | document.head.appendChild(style);
|
586 | await promise;
|
587 | return style;
|
588 | }
|
589 | }
|
590 |
|
591 | |
592 |
|
593 |
|
594 |
|
595 | async click(selector, options = {}) {
|
596 | const handle = await this.$(selector);
|
597 | console.assert(handle, 'No node found for selector: ' + selector);
|
598 | await handle.click(options);
|
599 | await handle.dispose();
|
600 | }
|
601 |
|
602 | |
603 |
|
604 |
|
605 | async focus(selector) {
|
606 | const handle = await this.$(selector);
|
607 | console.assert(handle, 'No node found for selector: ' + selector);
|
608 | await handle.focus();
|
609 | await handle.dispose();
|
610 | }
|
611 |
|
612 | |
613 |
|
614 |
|
615 | async hover(selector) {
|
616 | const handle = await this.$(selector);
|
617 | console.assert(handle, 'No node found for selector: ' + selector);
|
618 | await handle.hover();
|
619 | await handle.dispose();
|
620 | }
|
621 |
|
622 | |
623 |
|
624 |
|
625 |
|
626 |
|
627 | select(selector, ...values){
|
628 | for (const value of values)
|
629 | console.assert(helper.isString(value), 'Values must be strings. Found value "' + value + '" of type "' + (typeof value) + '"');
|
630 | return this.$eval(selector, (element, values) => {
|
631 | if (element.nodeName.toLowerCase() !== 'select')
|
632 | throw new Error('Element is not a <select> element.');
|
633 |
|
634 | const options = Array.from(element.options);
|
635 | element.value = undefined;
|
636 | for (const option of options) {
|
637 | option.selected = values.includes(option.value);
|
638 | if (option.selected && !element.multiple)
|
639 | break;
|
640 | }
|
641 | element.dispatchEvent(new Event('input', { 'bubbles': true }));
|
642 | element.dispatchEvent(new Event('change', { 'bubbles': true }));
|
643 | return options.filter(option => option.selected).map(option => option.value);
|
644 | }, values);
|
645 | }
|
646 |
|
647 | |
648 |
|
649 |
|
650 | async tap(selector) {
|
651 | const handle = await this.$(selector);
|
652 | console.assert(handle, 'No node found for selector: ' + selector);
|
653 | await handle.tap();
|
654 | await handle.dispose();
|
655 | }
|
656 |
|
657 | |
658 |
|
659 |
|
660 |
|
661 |
|
662 | async type(selector, text, options) {
|
663 | const handle = await this.$(selector);
|
664 | console.assert(handle, 'No node found for selector: ' + selector);
|
665 | await handle.type(text, options);
|
666 | await handle.dispose();
|
667 | }
|
668 |
|
669 | |
670 |
|
671 |
|
672 |
|
673 |
|
674 |
|
675 | waitFor(selectorOrFunctionOrTimeout, options = {}, ...args) {
|
676 | const xPathPattern = '//';
|
677 |
|
678 | if (helper.isString(selectorOrFunctionOrTimeout)) {
|
679 | const string = (selectorOrFunctionOrTimeout);
|
680 | if (string.startsWith(xPathPattern))
|
681 | return this.waitForXPath(string, options);
|
682 | return this.waitForSelector(string, options);
|
683 | }
|
684 | if (helper.isNumber(selectorOrFunctionOrTimeout))
|
685 | return new Promise(fulfill => setTimeout(fulfill, selectorOrFunctionOrTimeout));
|
686 | if (typeof selectorOrFunctionOrTimeout === 'function')
|
687 | return this.waitForFunction(selectorOrFunctionOrTimeout, options, ...args);
|
688 | return Promise.reject(new Error('Unsupported target type: ' + (typeof selectorOrFunctionOrTimeout)));
|
689 | }
|
690 |
|
691 | |
692 |
|
693 |
|
694 |
|
695 |
|
696 | waitForSelector(selector, options = {}) {
|
697 | return this._waitForSelectorOrXPath(selector, false, options);
|
698 | }
|
699 |
|
700 | |
701 |
|
702 |
|
703 |
|
704 |
|
705 | waitForXPath(xpath, options = {}) {
|
706 | return this._waitForSelectorOrXPath(xpath, true, options);
|
707 | }
|
708 |
|
709 | |
710 |
|
711 |
|
712 |
|
713 |
|
714 | waitForFunction(pageFunction, options = {}, ...args) {
|
715 | const timeout = helper.isNumber(options.timeout) ? options.timeout : 30000;
|
716 | const polling = options.polling || 'raf';
|
717 | return new WaitTask(this, pageFunction, 'function', polling, timeout, ...args).promise;
|
718 | }
|
719 |
|
720 | |
721 |
|
722 |
|
723 | async title() {
|
724 | return this.evaluate(() => document.title);
|
725 | }
|
726 |
|
727 | |
728 |
|
729 |
|
730 |
|
731 |
|
732 |
|
733 | _waitForSelectorOrXPath(selectorOrXPath, isXPath, options = {}) {
|
734 | const waitForVisible = !!options.visible;
|
735 | const waitForHidden = !!options.hidden;
|
736 | const polling = waitForVisible || waitForHidden ? 'raf' : 'mutation';
|
737 | const timeout = helper.isNumber(options.timeout) ? options.timeout : 30000;
|
738 | return new WaitTask(this, predicate, `${isXPath ? 'XPath' : 'selector'} "${selectorOrXPath}"`, polling, timeout, selectorOrXPath, isXPath, waitForVisible, waitForHidden).promise;
|
739 |
|
740 | |
741 |
|
742 |
|
743 |
|
744 |
|
745 |
|
746 |
|
747 | function predicate(selectorOrXPath, isXPath, waitForVisible, waitForHidden) {
|
748 | const node = isXPath
|
749 | ? document.evaluate(selectorOrXPath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue
|
750 | : document.querySelector(selectorOrXPath);
|
751 | if (!node)
|
752 | return waitForHidden;
|
753 | if (!waitForVisible && !waitForHidden)
|
754 | return node;
|
755 | const element = (node.nodeType === Node.TEXT_NODE ? node.parentElement : node);
|
756 |
|
757 | const style = window.getComputedStyle(element);
|
758 | const isVisible = style && style.visibility !== 'hidden' && hasVisibleBoundingBox();
|
759 | const success = (waitForVisible === isVisible || waitForHidden === !isVisible);
|
760 | return success ? node : null;
|
761 |
|
762 | |
763 |
|
764 |
|
765 | function hasVisibleBoundingBox() {
|
766 | const rect = element.getBoundingClientRect();
|
767 | return !!(rect.top || rect.bottom || rect.width || rect.height);
|
768 | }
|
769 | }
|
770 | }
|
771 |
|
772 | |
773 |
|
774 |
|
775 | _navigated(framePayload) {
|
776 | this._name = framePayload.name;
|
777 | this._url = framePayload.url;
|
778 | }
|
779 |
|
780 | |
781 |
|
782 |
|
783 | _navigatedWithinDocument(url) {
|
784 | this._url = url;
|
785 | }
|
786 |
|
787 | |
788 |
|
789 |
|
790 |
|
791 | _onLifecycleEvent(loaderId, name) {
|
792 | if (name === 'init') {
|
793 | this._loaderId = loaderId;
|
794 | this._lifecycleEvents.clear();
|
795 | }
|
796 | this._lifecycleEvents.add(name);
|
797 | }
|
798 |
|
799 | _onLoadingStopped() {
|
800 | this._lifecycleEvents.add('DOMContentLoaded');
|
801 | this._lifecycleEvents.add('load');
|
802 | }
|
803 |
|
804 | _detach() {
|
805 | for (const waitTask of this._waitTasks)
|
806 | waitTask.terminate(new Error('waitForFunction failed: frame got detached.'));
|
807 | this._detached = true;
|
808 | if (this._parentFrame)
|
809 | this._parentFrame._childFrames.delete(this);
|
810 | this._parentFrame = null;
|
811 | }
|
812 | }
|
813 | helper.tracePublicAPI(Frame);
|
814 |
|
815 | class WaitTask {
|
816 | |
817 |
|
818 |
|
819 |
|
820 |
|
821 |
|
822 |
|
823 | constructor(frame, predicateBody, title, polling, timeout, ...args) {
|
824 | if (helper.isString(polling))
|
825 | console.assert(polling === 'raf' || polling === 'mutation', 'Unknown polling option: ' + polling);
|
826 | else if (helper.isNumber(polling))
|
827 | console.assert(polling > 0, 'Cannot poll with non-positive interval: ' + polling);
|
828 | else
|
829 | throw new Error('Unknown polling options: ' + polling);
|
830 |
|
831 | this._frame = frame;
|
832 | this._polling = polling;
|
833 | this._timeout = timeout;
|
834 | this._predicateBody = helper.isString(predicateBody) ? 'return ' + predicateBody : 'return (' + predicateBody + ')(...args)';
|
835 | this._args = args;
|
836 | this._runCount = 0;
|
837 | frame._waitTasks.add(this);
|
838 | this.promise = new Promise((resolve, reject) => {
|
839 | this._resolve = resolve;
|
840 | this._reject = reject;
|
841 | });
|
842 |
|
843 |
|
844 | if (timeout)
|
845 | this._timeoutTimer = setTimeout(() => this.terminate(new Error(`waiting for ${title} failed: timeout ${timeout}ms exceeded`)), timeout);
|
846 | this.rerun();
|
847 | }
|
848 |
|
849 | |
850 |
|
851 |
|
852 | terminate(error) {
|
853 | this._terminated = true;
|
854 | this._reject(error);
|
855 | this._cleanup();
|
856 | }
|
857 |
|
858 | async rerun() {
|
859 | const runCount = ++this._runCount;
|
860 |
|
861 | let success = null;
|
862 | let error = null;
|
863 | try {
|
864 | success = await (await this._frame.executionContext()).evaluateHandle(waitForPredicatePageFunction, this._predicateBody, this._polling, this._timeout, ...this._args);
|
865 | } catch (e) {
|
866 | error = e;
|
867 | }
|
868 |
|
869 | if (this._terminated || runCount !== this._runCount) {
|
870 | if (success)
|
871 | await success.dispose();
|
872 | return;
|
873 | }
|
874 |
|
875 |
|
876 | if (!error && await this._frame.evaluate(s => !s, success)) {
|
877 | await success.dispose();
|
878 | return;
|
879 | }
|
880 |
|
881 |
|
882 |
|
883 | if (error && error.message.includes('Execution context was destroyed'))
|
884 | return;
|
885 |
|
886 |
|
887 |
|
888 | if (error && error.message.includes('Cannot find context with specified id'))
|
889 | return;
|
890 |
|
891 | if (error)
|
892 | this._reject(error);
|
893 | else
|
894 | this._resolve(success);
|
895 |
|
896 | this._cleanup();
|
897 | }
|
898 |
|
899 | _cleanup() {
|
900 | clearTimeout(this._timeoutTimer);
|
901 | this._frame._waitTasks.delete(this);
|
902 | this._runningTask = null;
|
903 | }
|
904 | }
|
905 |
|
906 |
|
907 |
|
908 |
|
909 |
|
910 |
|
911 |
|
912 | async function waitForPredicatePageFunction(predicateBody, polling, timeout, ...args) {
|
913 | const predicate = new Function('...args', predicateBody);
|
914 | let timedOut = false;
|
915 | setTimeout(() => timedOut = true, timeout);
|
916 | if (polling === 'raf')
|
917 | return await pollRaf();
|
918 | if (polling === 'mutation')
|
919 | return await pollMutation();
|
920 | if (typeof polling === 'number')
|
921 | return await pollInterval(polling);
|
922 |
|
923 | |
924 |
|
925 |
|
926 | function pollMutation() {
|
927 | const success = predicate.apply(null, args);
|
928 | if (success)
|
929 | return Promise.resolve(success);
|
930 |
|
931 | let fulfill;
|
932 | const result = new Promise(x => fulfill = x);
|
933 | const observer = new MutationObserver(mutations => {
|
934 | if (timedOut) {
|
935 | observer.disconnect();
|
936 | fulfill();
|
937 | }
|
938 | const success = predicate.apply(null, args);
|
939 | if (success) {
|
940 | observer.disconnect();
|
941 | fulfill(success);
|
942 | }
|
943 | });
|
944 | observer.observe(document, {
|
945 | childList: true,
|
946 | subtree: true,
|
947 | attributes: true
|
948 | });
|
949 | return result;
|
950 | }
|
951 |
|
952 | |
953 |
|
954 |
|
955 | function pollRaf() {
|
956 | let fulfill;
|
957 | const result = new Promise(x => fulfill = x);
|
958 | onRaf();
|
959 | return result;
|
960 |
|
961 | function onRaf() {
|
962 | if (timedOut) {
|
963 | fulfill();
|
964 | return;
|
965 | }
|
966 | const success = predicate.apply(null, args);
|
967 | if (success)
|
968 | fulfill(success);
|
969 | else
|
970 | requestAnimationFrame(onRaf);
|
971 | }
|
972 | }
|
973 |
|
974 | |
975 |
|
976 |
|
977 |
|
978 | function pollInterval(pollInterval) {
|
979 | let fulfill;
|
980 | const result = new Promise(x => fulfill = x);
|
981 | onTimeout();
|
982 | return result;
|
983 |
|
984 | function onTimeout() {
|
985 | if (timedOut) {
|
986 | fulfill();
|
987 | return;
|
988 | }
|
989 | const success = predicate.apply(null, args);
|
990 | if (success)
|
991 | fulfill(success);
|
992 | else
|
993 | setTimeout(onTimeout, pollInterval);
|
994 | }
|
995 | }
|
996 | }
|
997 |
|
998 | module.exports = {FrameManager, Frame};
|