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  212. <a name='L147'></a><a href='#L147'>147</a>
    213. 

  213. <a name='L148'></a><a href='#L148'>148</a>
    214. 

  214. <a name='L149'></a><a href='#L149'>149</a>
    215. 

  215. <a name='L150'></a><a href='#L150'>150</a>
    216. 

  216. <a name='L151'></a><a href='#L151'>151</a>
    217. 

  217. <a name='L152'></a><a href='#L152'>152</a>
    218. 

  218. <a name='L153'></a><a href='#L153'>153</a>
    219. 

  219. <a name='L154'></a><a href='#L154'>154</a>
    220. 

  220. <a name='L155'></a><a href='#L155'>155</a>
    221. 

  221. <a name='L156'></a><a href='#L156'>156</a>
    222. 

  222. <a name='L157'></a><a href='#L157'>157</a>
    223. 

  223. <a name='L158'></a><a href='#L158'>158</a>
    224. 

  224. <a name='L159'></a><a href='#L159'>159</a>
    225. 

  225. <a name='L160'></a><a href='#L160'>160</a>
    226. 

  226. <a name='L161'></a><a href='#L161'>161</a>
    227. 

  227. <a name='L162'></a><a href='#L162'>162</a>
    228. 

  228. <a name='L163'></a><a href='#L163'>163</a>
    229. 

  229. <a name='L164'></a><a href='#L164'>164</a>
    230. 

  230. <a name='L165'></a><a href='#L165'>165</a>
    231. 

  231. <a name='L166'></a><a href='#L166'>166</a>
    232. 

  232. <a name='L167'></a><a href='#L167'>167</a>
    233. 

  233. <a name='L168'></a><a href='#L168'>168</a>
    234. 

  234. <a name='L169'></a><a href='#L169'>169</a>
    235. 

  235. <a name='L170'></a><a href='#L170'>170</a>
    236. 

  236. <a name='L171'></a><a href='#L171'>171</a>
    237. 

  237. <a name='L172'></a><a href='#L172'>172</a>
    238. 

  238. <a name='L173'></a><a href='#L173'>173</a>
    239. 

  239. <a name='L174'></a><a href='#L174'>174</a>
    240. 

  240. <a name='L175'></a><a href='#L175'>175</a>
    241. 

  241. <a name='L176'></a><a href='#L176'>176</a>
    242. 

  242. <a name='L177'></a><a href='#L177'>177</a>
    243. 

  243. <a name='L178'></a><a href='#L178'>178</a>
    244. 

  244. <a name='L179'></a><a href='#L179'>179</a>
    245. 

  245. <a name='L180'></a><a href='#L180'>180</a>
    246. 

  246. <a name='L181'></a><a href='#L181'>181</a>
    247. 

  247. <a name='L182'></a><a href='#L182'>182</a>
    248. 

  248. <a name='L183'></a><a href='#L183'>183</a>
    249. 

  249. <a name='L184'></a><a href='#L184'>184</a>
    250. 

  250. <a name='L185'></a><a href='#L185'>185</a>
    251. 

  251. <a name='L186'></a><a href='#L186'>186</a>
    252. 

  252. <a name='L187'></a><a href='#L187'>187</a>
    253. 

  253. <a name='L188'></a><a href='#L188'>188</a>
    254. 

  254. <a name='L189'></a><a href='#L189'>189</a>
    255. 

  255. <a name='L190'></a><a href='#L190'>190</a>
    256. 

  256. <a name='L191'></a><a href='#L191'>191</a>
    257. 

  257. <a name='L192'></a><a href='#L192'>192</a>
    258. 

  258. <a name='L193'></a><a href='#L193'>193</a>
    259. 

  259. <a name='L194'></a><a href='#L194'>194</a>
    260. 

  260. <a name='L195'></a><a href='#L195'>195</a>
    261. 

  261. <a name='L196'></a><a href='#L196'>196</a>
    262. 

  262. <a name='L197'></a><a href='#L197'>197</a>
    263. 

  263. <a name='L198'></a><a href='#L198'>198</a>
    264. 

  264. <a name='L199'></a><a href='#L199'>199</a>
    265. 

  265. <a name='L200'></a><a href='#L200'>200</a>
    266. 

  266. <a name='L201'></a><a href='#L201'>201</a>
    267. 

  267. <a name='L202'></a><a href='#L202'>202</a>
    268. 

  268. <a name='L203'></a><a href='#L203'>203</a>
    269. 

  269. <a name='L204'></a><a href='#L204'>204</a>
    270. 

  270. <a name='L205'></a><a href='#L205'>205</a>
    271. 

  271. <a name='L206'></a><a href='#L206'>206</a>
    272. 

  272. <a name='L207'></a><a href='#L207'>207</a>
    273. 

  273. <a name='L208'></a><a href='#L208'>208</a>
    274. 

  274. <a name='L209'></a><a href='#L209'>209</a>
    275. 

  275. <a name='L210'></a><a href='#L210'>210</a>
    276. 

  276. <a name='L211'></a><a href='#L211'>211</a>
    277. 

  277. <a name='L212'></a><a href='#L212'>212</a>
    278. 

  278. <a name='L213'></a><a href='#L213'>213</a>
    279. 

  279. <a name='L214'></a><a href='#L214'>214</a>
    280. 

  280. <a name='L215'></a><a href='#L215'>215</a>
    281. 

  281. <a name='L216'></a><a href='#L216'>216</a>
    282. 

  282. <a name='L217'></a><a href='#L217'>217</a>
    283. 

  283. <a name='L218'></a><a href='#L218'>218</a>
    284. 

  284. <a name='L219'></a><a href='#L219'>219</a>
    285. 

  285. <a name='L220'></a><a href='#L220'>220</a>
    286. 

  286. <a name='L221'></a><a href='#L221'>221</a>
    287. 

  287. <a name='L222'></a><a href='#L222'>222</a>
    288. 

  288. <a name='L223'></a><a href='#L223'>223</a>
    289. 

  289. <a name='L224'></a><a href='#L224'>224</a>
    290. 

  290. <a name='L225'></a><a href='#L225'>225</a>
    291. 

  291. <a name='L226'></a><a href='#L226'>226</a>
    292. 

  292. <a name='L227'></a><a href='#L227'>227</a>
    293. 

  293. <a name='L228'></a><a href='#L228'>228</a>
    294. 

  294. <a name='L229'></a><a href='#L229'>229</a>
    295. 

  295. <a name='L230'></a><a href='#L230'>230</a>
    296. 

  296. <a name='L231'></a><a href='#L231'>231</a>
    297. 

  297. <a name='L232'></a><a href='#L232'>232</a>
    298. 

  298. <a name='L233'></a><a href='#L233'>233</a>
    299. 

  299. <a name='L234'></a><a href='#L234'>234</a>
    300. 

  300. <a name='L235'></a><a href='#L235'>235</a>
    301. 

  301. <a name='L236'></a><a href='#L236'>236</a>
    302. 

  302. <a name='L237'></a><a href='#L237'>237</a>
    303. 

  303. <a name='L238'></a><a href='#L238'>238</a>
    304. 

  304. <a name='L239'></a><a href='#L239'>239</a>
    305. 

  305. <a name='L240'></a><a href='#L240'>240</a>
    306. 

  306. <a name='L241'></a><a href='#L241'>241</a>
    307. 

  307. <a name='L242'></a><a href='#L242'>242</a>
    308. 

  308. <a name='L243'></a><a href='#L243'>243</a>
    309. 

  309. <a name='L244'></a><a href='#L244'>244</a>
    310. 

  310. <a name='L245'></a><a href='#L245'>245</a>
    311. 

  311. <a name='L246'></a><a href='#L246'>246</a>
    312. 

  312. <a name='L247'></a><a href='#L247'>247</a>
    313. 

  313. <a name='L248'></a><a href='#L248'>248</a>
    314. 

  314. <a name='L249'></a><a href='#L249'>249</a>
    315. 

  315. <a name='L250'></a><a href='#L250'>250</a>
    316. 

  316. <a name='L251'></a><a href='#L251'>251</a>
    317. 

  317. <a name='L252'></a><a href='#L252'>252</a>
    318. 

  318. <a name='L253'></a><a href='#L253'>253</a>
    319. 

  319. <a name='L254'></a><a href='#L254'>254</a>
    320. 

  320. <a name='L255'></a><a href='#L255'>255</a>
    321. 

  321. <a name='L256'></a><a href='#L256'>256</a>
    322. 

  322. <a name='L257'></a><a href='#L257'>257</a>
    323. 

  323. <a name='L258'></a><a href='#L258'>258</a>
    324. 

  324. <a name='L259'></a><a href='#L259'>259</a>
    325. 

  325. <a name='L260'></a><a href='#L260'>260</a>
    326. 

  326. <a name='L261'></a><a href='#L261'>261</a>
    327. 

  327. <a name='L262'></a><a href='#L262'>262</a>
    328. 

  328. <a name='L263'></a><a href='#L263'>263</a>
    329. 

  329. <a name='L264'></a><a href='#L264'>264</a>
    330. 

  330. <a name='L265'></a><a href='#L265'>265</a>
    331. 

  331. <a name='L266'></a><a href='#L266'>266</a>
    332. 

  332. <a name='L267'></a><a href='#L267'>267</a>
    333. 

  333. <a name='L268'></a><a href='#L268'>268</a>
    334. 

  334. <a name='L269'></a><a href='#L269'>269</a>
    335. 

  335. <a name='L270'></a><a href='#L270'>270</a>
    336. 

  336. <a name='L271'></a><a href='#L271'>271</a>
    337. 

  337. <a name='L272'></a><a href='#L272'>272</a>
    338. 

  338. <a name='L273'></a><a href='#L273'>273</a>
    339. 

  339. <a name='L274'></a><a href='#L274'>274</a>
    340. 

  340. <a name='L275'></a><a href='#L275'>275</a>
    341. 

  341. <a name='L276'></a><a href='#L276'>276</a>
    342. 

  342. <a name='L277'></a><a href='#L277'>277</a>
    343. 

  343. <a name='L278'></a><a href='#L278'>278</a>
    344. 

  344. <a name='L279'></a><a href='#L279'>279</a>
    345. 

  345. <a name='L280'></a><a href='#L280'>280</a>
    346. 

  346. <a name='L281'></a><a href='#L281'>281</a>
    347. 

  347. <a name='L282'></a><a href='#L282'>282</a>
    348. 

  348. <a name='L283'></a><a href='#L283'>283</a>
    349. 

  349. <a name='L284'></a><a href='#L284'>284</a>
    350. 

  350. <a name='L285'></a><a href='#L285'>285</a>
    351. 

  351. <a name='L286'></a><a href='#L286'>286</a>
    352. 

  352. <a name='L287'></a><a href='#L287'>287</a>
    353. 

  353. <a name='L288'></a><a href='#L288'>288</a>
    354. 

  354. <a name='L289'></a><a href='#L289'>289</a>
    355. 

  355. <a name='L290'></a><a href='#L290'>290</a>
    356. 

  356. <a name='L291'></a><a href='#L291'>291</a>
    357. 

  357. <a name='L292'></a><a href='#L292'>292</a>
    358. 

  358. <a name='L293'></a><a href='#L293'>293</a>
    359. 

  359. <a name='L294'></a><a href='#L294'>294</a>
    360. 

  360. <a name='L295'></a><a href='#L295'>295</a>
    361. 

  361. <a name='L296'></a><a href='#L296'>296</a>
    362. 

  362. <a name='L297'></a><a href='#L297'>297</a>
    363. 

  363. <a name='L298'></a><a href='#L298'>298</a>
    364. 

  364. <a name='L299'></a><a href='#L299'>299</a>
    365. 

  365. <a name='L300'></a><a href='#L300'>300</a>
    366. 

  366. <a name='L301'></a><a href='#L301'>301</a>
    367. 

  367. <a name='L302'></a><a href='#L302'>302</a>
    368. 

  368. <a name='L303'></a><a href='#L303'>303</a>
    369. 

  369. <a name='L304'></a><a href='#L304'>304</a>
    370. 

  370. <a name='L305'></a><a href='#L305'>305</a>
    371. 

  371. <a name='L306'></a><a href='#L306'>306</a>
    372. 

  372. <a name='L307'></a><a href='#L307'>307</a>
    373. 

  373. <a name='L308'></a><a href='#L308'>308</a>
    374. 

  374. <a name='L309'></a><a href='#L309'>309</a>
    375. 

  375. <a name='L310'></a><a href='#L310'>310</a>
    376. 

  376. <a name='L311'></a><a href='#L311'>311</a>
    377. 

  377. <a name='L312'></a><a href='#L312'>312</a>
    378. 

  378. <a name='L313'></a><a href='#L313'>313</a>
    379. 

  379. <a name='L314'></a><a href='#L314'>314</a>
    380. 

  380. <a name='L315'></a><a href='#L315'>315</a>
    381. 

  381. <a name='L316'></a><a href='#L316'>316</a>
    382. 

  382. <a name='L317'></a><a href='#L317'>317</a>
    383. 

  383. <a name='L318'></a><a href='#L318'>318</a>
    384. 

  384. <a name='L319'></a><a href='#L319'>319</a>
    385. 

  385. <a name='L320'></a><a href='#L320'>320</a>
    386. 

  386. <a name='L321'></a><a href='#L321'>321</a>
    387. 

  387. <a name='L322'></a><a href='#L322'>322</a>
    388. 

  388. <a name='L323'></a><a href='#L323'>323</a>
    389. 

  389. <a name='L324'></a><a href='#L324'>324</a>
    390. 

  390. <a name='L325'></a><a href='#L325'>325</a>
    391. 

  391. <a name='L326'></a><a href='#L326'>326</a>
    392. 

  392. <a name='L327'></a><a href='#L327'>327</a>
    393. 

  393. <a name='L328'></a><a href='#L328'>328</a>
    394. 

  394. <a name='L329'></a><a href='#L329'>329</a>
    395. 

  395. <a name='L330'></a><a href='#L330'>330</a>
    396. 

  396. <a name='L331'></a><a href='#L331'>331</a>
    397. 

  397. <a name='L332'></a><a href='#L332'>332</a>
    398. 

  398. <a name='L333'></a><a href='#L333'>333</a>
    399. 

  399. <a name='L334'></a><a href='#L334'>334</a>
    400. 

  400. <a name='L335'></a><a href='#L335'>335</a>
    401. 

  401. <a name='L336'></a><a href='#L336'>336</a>
    402. 

  402. <a name='L337'></a><a href='#L337'>337</a>
    403. 

  403. <a name='L338'></a><a href='#L338'>338</a>
    404. 

  404. <a name='L339'></a><a href='#L339'>339</a>
    405. 

  405. <a name='L340'></a><a href='#L340'>340</a>
    406. 

  406. <a name='L341'></a><a href='#L341'>341</a>
    407. 

  407. <a name='L342'></a><a href='#L342'>342</a>
    408. 

  408. <a name='L343'></a><a href='#L343'>343</a>
    409. 

  409. <a name='L344'></a><a href='#L344'>344</a>
    410. 

  410. <a name='L345'></a><a href='#L345'>345</a>
    411. 

  411. <a name='L346'></a><a href='#L346'>346</a>
    412. 

  412. <a name='L347'></a><a href='#L347'>347</a>
    413. 

  413. <a name='L348'></a><a href='#L348'>348</a>
    414. 

  414. <a name='L349'></a><a href='#L349'>349</a>
    415. 

  415. <a name='L350'></a><a href='#L350'>350</a>
    416. 

  416. <a name='L351'></a><a href='#L351'>351</a>
    417. 

  417. <a name='L352'></a><a href='#L352'>352</a>
    418. 

  418. <a name='L353'></a><a href='#L353'>353</a>
    419. 

  419. <a name='L354'></a><a href='#L354'>354</a>
    420. 

  420. <a name='L355'></a><a href='#L355'>355</a>
    421. 

  421. <a name='L356'></a><a href='#L356'>356</a>
    422. 

  422. <a name='L357'></a><a href='#L357'>357</a>
    423. 

  423. <a name='L358'></a><a href='#L358'>358</a>
    424. 

  424. <a name='L359'></a><a href='#L359'>359</a>
    425. 

  425. <a name='L360'></a><a href='#L360'>360</a>
    426. 

  426. <a name='L361'></a><a href='#L361'>361</a>
    427. 

  427. <a name='L362'></a><a href='#L362'>362</a>
    428. 

  428. <a name='L363'></a><a href='#L363'>363</a>
    429. 

  429. <a name='L364'></a><a href='#L364'>364</a>
    430. 

  430. <a name='L365'></a><a href='#L365'>365</a>
    431. 

  431. <a name='L366'></a><a href='#L366'>366</a>
    432. 

  432. <a name='L367'></a><a href='#L367'>367</a>
    433. 

  433. <a name='L368'></a><a href='#L368'>368</a>
    434. 

  434. <a name='L369'></a><a href='#L369'>369</a>
    435. 

  435. <a name='L370'></a><a href='#L370'>370</a>
    436. 

  436. <a name='L371'></a><a href='#L371'>371</a>
    437. 

  437. <a name='L372'></a><a href='#L372'>372</a>
    438. 

  438. <a name='L373'></a><a href='#L373'>373</a>
    439. 

  439. <a name='L374'></a><a href='#L374'>374</a>
    440. 

  440. <a name='L375'></a><a href='#L375'>375</a>
    441. 

  441. <a name='L376'></a><a href='#L376'>376</a>
    442. 

  442. <a name='L377'></a><a href='#L377'>377</a>
    443. 

  443. <a name='L378'></a><a href='#L378'>378</a>
    444. 

  444. <a name='L379'></a><a href='#L379'>379</a>
    445. 

  445. <a name='L380'></a><a href='#L380'>380</a>
    446. 

  446. <a name='L381'></a><a href='#L381'>381</a>
    447. 

  447. <a name='L382'></a><a href='#L382'>382</a>
    448. 

  448. <a name='L383'></a><a href='#L383'>383</a>
    449. 

  449. <a name='L384'></a><a href='#L384'>384</a>
    450. 

  450. <a name='L385'></a><a href='#L385'>385</a>
    451. 

  451. <a name='L386'></a><a href='#L386'>386</a>
    452. 

  452. <a name='L387'></a><a href='#L387'>387</a>
    453. 

  453. <a name='L388'></a><a href='#L388'>388</a>
    454. 

  454. <a name='L389'></a><a href='#L389'>389</a>
    455. 

  455. <a name='L390'></a><a href='#L390'>390</a>
    456. 

  456. <a name='L391'></a><a href='#L391'>391</a>
    457. 

  457. <a name='L392'></a><a href='#L392'>392</a>
    458. 

  458. <a name='L393'></a><a href='#L393'>393</a>
    459. 

  459. <a name='L394'></a><a href='#L394'>394</a>
    460. 

  460. <a name='L395'></a><a href='#L395'>395</a>
    461. 

  461. <a name='L396'></a><a href='#L396'>396</a>
    462. 

  462. <a name='L397'></a><a href='#L397'>397</a>
    463. 

  463. <a name='L398'></a><a href='#L398'>398</a>
    464. 

  464. <a name='L399'></a><a href='#L399'>399</a>
    465. 

  465. <a name='L400'></a><a href='#L400'>400</a>
    466. 

  466. <a name='L401'></a><a href='#L401'>401</a>
    467. 

  467. <a name='L402'></a><a href='#L402'>402</a>
    468. 

  468. <a name='L403'></a><a href='#L403'>403</a>
    469. 

  469. <a name='L404'></a><a href='#L404'>404</a>
    470. 

  470. <a name='L405'></a><a href='#L405'>405</a>
    471. 

  471. <a name='L406'></a><a href='#L406'>406</a>
    472. 

  472. <a name='L407'></a><a href='#L407'>407</a>
    473. 

  473. <a name='L408'></a><a href='#L408'>408</a>
    474. 

  474. <a name='L409'></a><a href='#L409'>409</a>
    475. 

  475. <a name='L410'></a><a href='#L410'>410</a>
    476. 

  476. <a name='L411'></a><a href='#L411'>411</a>
    477. 

  477. <a name='L412'></a><a href='#L412'>412</a>
    478. 

  478. <a name='L413'></a><a href='#L413'>413</a>
    479. 

  479. <a name='L414'></a><a href='#L414'>414</a>
    480. 

  480. <a name='L415'></a><a href='#L415'>415</a>
    481. 

  481. <a name='L416'></a><a href='#L416'>416</a>
    482. 

  482. <a name='L417'></a><a href='#L417'>417</a>
    483. 

  483. <a name='L418'></a><a href='#L418'>418</a>
    484. 

  484. <a name='L419'></a><a href='#L419'>419</a>
    485. 

  485. <a name='L420'></a><a href='#L420'>420</a>
    486. 

  486. <a name='L421'></a><a href='#L421'>421</a>
    487. 

  487. <a name='L422'></a><a href='#L422'>422</a>
    488. 

  488. <a name='L423'></a><a href='#L423'>423</a>
    489. 

  489. <a name='L424'></a><a href='#L424'>424</a>
    490. 

  490. <a name='L425'></a><a href='#L425'>425</a>
    491. 

  491. <a name='L426'></a><a href='#L426'>426</a>
    492. 

  492. <a name='L427'></a><a href='#L427'>427</a>
    493. 

  493. <a name='L428'></a><a href='#L428'>428</a>
    494. 

  494. <a name='L429'></a><a href='#L429'>429</a>
    495. 

  495. <a name='L430'></a><a href='#L430'>430</a>
    496. 

  496. <a name='L431'></a><a href='#L431'>431</a>
    497. 

  497. <a name='L432'></a><a href='#L432'>432</a>
    498. 

  498. <a name='L433'></a><a href='#L433'>433</a>
    499. 

  499. <a name='L434'></a><a href='#L434'>434</a>
    500. 

  500. <a name='L435'></a><a href='#L435'>435</a>
    501. 

  501. <a name='L436'></a><a href='#L436'>436</a>
    502. 

  502. <a name='L437'></a><a href='#L437'>437</a>
    503. 

  503. <a name='L438'></a><a href='#L438'>438</a>
    504. 

  504. <a name='L439'></a><a href='#L439'>439</a>
    505. 

  505. <a name='L440'></a><a href='#L440'>440</a>
    506. 

  506. <a name='L441'></a><a href='#L441'>441</a>
    507. 

  507. <a name='L442'></a><a href='#L442'>442</a>
    508. 

  508. <a name='L443'></a><a href='#L443'>443</a>
    509. 

  509. <a name='L444'></a><a href='#L444'>444</a>
    510. 

  510. <a name='L445'></a><a href='#L445'>445</a>
    511. 

  511. <a name='L446'></a><a href='#L446'>446</a>
    512. 

  512. <a name='L447'></a><a href='#L447'>447</a>
    513. 

  513. <a name='L448'></a><a href='#L448'>448</a>
    514. 

  514. <a name='L449'></a><a href='#L449'>449</a>
    515. 

  515. <a name='L450'></a><a href='#L450'>450</a>
    516. 

  516. <a name='L451'></a><a href='#L451'>451</a>
    517. 

  517. <a name='L452'></a><a href='#L452'>452</a>
    518. 

  518. <a name='L453'></a><a href='#L453'>453</a>
    519. 

  519. <a name='L454'></a><a href='#L454'>454</a>
    520. 

  520. <a name='L455'></a><a href='#L455'>455</a>
    521. 

  521. <a name='L456'></a><a href='#L456'>456</a>
    522. 

  522. <a name='L457'></a><a href='#L457'>457</a>
    523. 

  523. <a name='L458'></a><a href='#L458'>458</a>
    524. 

  524. <a name='L459'></a><a href='#L459'>459</a>
    525. 

  525. <a name='L460'></a><a href='#L460'>460</a>
    526. 

  526. <a name='L461'></a><a href='#L461'>461</a>
    527. 

  527. <a name='L462'></a><a href='#L462'>462</a>
    528. 

  528. <a name='L463'></a><a href='#L463'>463</a>
    529. 

  529. <a name='L464'></a><a href='#L464'>464</a>
    530. 

  530. <a name='L465'></a><a href='#L465'>465</a>
    531. 

  531. <a name='L466'></a><a href='#L466'>466</a>
    532. 

  532. <a name='L467'></a><a href='#L467'>467</a>
    533. 

  533. <a name='L468'></a><a href='#L468'>468</a>
    534. 

  534. <a name='L469'></a><a href='#L469'>469</a>
    535. 

  535. <a name='L470'></a><a href='#L470'>470</a>
    536. 

  536. <a name='L471'></a><a href='#L471'>471</a>
    537. 

  537. <a name='L472'></a><a href='#L472'>472</a>
    538. 

  538. <a name='L473'></a><a href='#L473'>473</a>
    539. 

  539. <a name='L474'></a><a href='#L474'>474</a>
    540. 

  540. <a name='L475'></a><a href='#L475'>475</a>
    541. 

  541. <a name='L476'></a><a href='#L476'>476</a>
    542. 

  542. <a name='L477'></a><a href='#L477'>477</a>
    543. 

  543. <a name='L478'></a><a href='#L478'>478</a>
    544. 

  544. <a name='L479'></a><a href='#L479'>479</a>
    545. 

  545. <a name='L480'></a><a href='#L480'>480</a>
    546. 

  546. <a name='L481'></a><a href='#L481'>481</a>
    547. 

  547. <a name='L482'></a><a href='#L482'>482</a>
    548. 

  548. <a name='L483'></a><a href='#L483'>483</a>
    549. 

  549. <a name='L484'></a><a href='#L484'>484</a>
    550. 

  550. <a name='L485'></a><a href='#L485'>485</a>
    551. 

  551. <a name='L486'></a><a href='#L486'>486</a>
    552. 

  552. <a name='L487'></a><a href='#L487'>487</a>
    553. 

  553. <a name='L488'></a><a href='#L488'>488</a>
    554. 

  554. <a name='L489'></a><a href='#L489'>489</a>
    555. 

  555. <a name='L490'></a><a href='#L490'>490</a>
    556. 

  556. <a name='L491'></a><a href='#L491'>491</a>
    557. 

  557. <a name='L492'></a><a href='#L492'>492</a>
    558. 

  558. <a name='L493'></a><a href='#L493'>493</a>
    559. 

  559. <a name='L494'></a><a href='#L494'>494</a>
    560. 

  560. <a name='L495'></a><a href='#L495'>495</a>
    561. 

  561. <a name='L496'></a><a href='#L496'>496</a>
    562. 

  562. <a name='L497'></a><a href='#L497'>497</a>
    563. 

  563. <a name='L498'></a><a href='#L498'>498</a>
    564. 

  564. <a name='L499'></a><a href='#L499'>499</a>
    565. 

  565. <a name='L500'></a><a href='#L500'>500</a>
    566. 

  566. <a name='L501'></a><a href='#L501'>501</a>
    567. 

  567. <a name='L502'></a><a href='#L502'>502</a>
    568. 

  568. <a name='L503'></a><a href='#L503'>503</a>
    569. 

  569. <a name='L504'></a><a href='#L504'>504</a>
    570. 

  570. <a name='L505'></a><a href='#L505'>505</a></td><td class="line-coverage quiet"><span class="cline-any cline-no">&nbsp;</span>
    571. 

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  1069. <span class="cline-any cline-no">&nbsp;</span>
    1070. 

  1070. <span class="cline-any cline-no">&nbsp;</span>
    1071. 

  1071. <span class="cline-any cline-no">&nbsp;</span>
    1072. 

  1072. <span class="cline-any cline-no">&nbsp;</span>
    1073. 

  1073. <span class="cline-any cline-neutral">&nbsp;</span>
    1074. 

  1074. <span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >/**<span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" ></span></span></span>
    1075. 

  1075. <span class="cstat-no" title="statement not covered" > * 批量渲染器</span>
    1076. 

  1076. <span class="cstat-no" title="statement not covered" > * </span>
    1077. 

  1077. <span class="cstat-no" title="statement not covered" > * @description 优化大量元素的渲染性能</span>
    1078. 

  1078. <span class="cstat-no" title="statement not covered" > * </span>
    1079. 

  1079. <span class="cstat-no" title="statement not covered" > * 优化策略：</span>
    1080. 

  1080. <span class="cstat-no" title="statement not covered" > * 1. 使用 DocumentFragment 减少DOM重绘</span>
    1081. 

  1081. <span class="cstat-no" title="statement not covered" > * 2. 批量处理音符渲染</span>
    1082. 

  1082. <span class="cstat-no" title="statement not covered" > * 3. 支持可视区域渲染（虚拟化）</span>
    1083. 

  1083. <span class="cstat-no" title="statement not covered" > * 4. 提供渲染进度回调</span>
    1084. 

  1084. <span class="cstat-no" title="statement not covered" > */</span>
    1085. 

  1085. <span class="cstat-no" title="statement not covered" ></span>
    1086. 

  1086. <span class="cstat-no" title="statement not covered" >import { JianpuNote } from '../models/JianpuNote';</span>
    1087. 

  1087. <span class="cstat-no" title="statement not covered" >import { JianpuMeasure } from '../models/JianpuMeasure';</span>
    1088. 

  1088. <span class="cstat-no" title="statement not covered" >import { NoteDrawer } from '../core/drawer/NoteDrawer';</span>
    1089. 

  1089. <span class="cstat-no" title="statement not covered" >import { LineDrawer } from '../core/drawer/LineDrawer';</span>
    1090. 

  1090. <span class="cstat-no" title="statement not covered" >import { LyricDrawer } from '../core/drawer/LyricDrawer';</span>
    1091. 

  1091. <span class="cstat-no" title="statement not covered" ></span>
    1092. 

  1092. <span class="cstat-no" title="statement not covered" >// ==================== 类型定义 ====================</span>
    1093. 

  1093. <span class="cstat-no" title="statement not covered" ></span>
    1094. 

  1094. <span class="cstat-no" title="statement not covered" >/** 批量渲染配置 */</span>
    1095. 

  1095. <span class="cstat-no" title="statement not covered" >export interface BatchRendererConfig {</span>
    1096. 

  1096. <span class="cstat-no" title="statement not covered" >  /** 音符字体大小 */</span>
    1097. 

  1097. <span class="cstat-no" title="statement not covered" >  noteFontSize: number;</span>
    1098. 

  1098. <span class="cstat-no" title="statement not covered" >  /** 字体族 */</span>
    1099. 

  1099. <span class="cstat-no" title="statement not covered" >  fontFamily: string;</span>
    1100. 

  1100. <span class="cstat-no" title="statement not covered" >  /** 音符颜色 */</span>
    1101. 

  1101. <span class="cstat-no" title="statement not covered" >  noteColor: string;</span>
    1102. 

  1102. <span class="cstat-no" title="statement not covered" >  /** 四分音符间距 */</span>
    1103. 

  1103. <span class="cstat-no" title="statement not covered" >  quarterNoteSpacing: number;</span>
    1104. 

  1104. <span class="cstat-no" title="statement not covered" >  /** 线条颜色 */</span>
    1105. 

  1105. <span class="cstat-no" title="statement not covered" >  lineColor?: string;</span>
    1106. 

  1106. <span class="cstat-no" title="statement not covered" >  /** 歌词字体大小 */</span>
    1107. 

  1107. <span class="cstat-no" title="statement not covered" >  lyricFontSize?: number;</span>
    1108. 

  1108. <span class="cstat-no" title="statement not covered" >  /** 歌词颜色 */</span>
    1109. 

  1109. <span class="cstat-no" title="statement not covered" >  lyricColor?: string;</span>
    1110. 

  1110. <span class="cstat-no" title="statement not covered" >  /** 批次大小（每批处理的音符数量） */</span>
    1111. 

  1111. <span class="cstat-no" title="statement not covered" >  batchSize?: number;</span>
    1112. 

  1112. <span class="cstat-no" title="statement not covered" >  /** 是否渲染时值线 */</span>
    1113. 

  1113. <span class="cstat-no" title="statement not covered" >  renderDurationLines?: boolean;</span>
    1114. 

  1114. <span class="cstat-no" title="statement not covered" >  /** 是否渲染歌词 */</span>
    1115. 

  1115. <span class="cstat-no" title="statement not covered" >  renderLyrics?: boolean;</span>
    1116. 

  1116. <span class="cstat-no" title="statement not covered" >}</span>
    1117. 

  1117. <span class="cstat-no" title="statement not covered" ></span>
    1118. 

  1118. <span class="cstat-no" title="statement not covered" >/** 渲染进度回调 */</span>
    1119. 

  1119. <span class="cstat-no" title="statement not covered" >export type RenderProgressCallback = (progress: {</span>
    1120. 

  1120. <span class="cstat-no" title="statement not covered" >  current: number;</span>
    1121. 

  1121. <span class="cstat-no" title="statement not covered" >  total: number;</span>
    1122. 

  1122. <span class="cstat-no" title="statement not covered" >  percentage: number;</span>
    1123. 

  1123. <span class="cstat-no" title="statement not covered" >}) =&gt; void;</span>
    1124. 

  1124. <span class="cstat-no" title="statement not covered" ></span>
    1125. 

  1125. <span class="cstat-no" title="statement not covered" >/** 可视区域定义 */</span>
    1126. 

  1126. <span class="cstat-no" title="statement not covered" >export interface ViewportRect {</span>
    1127. 

  1127. <span class="cstat-no" title="statement not covered" >  x: number;</span>
    1128. 

  1128. <span class="cstat-no" title="statement not covered" >  y: number;</span>
    1129. 

  1129. <span class="cstat-no" title="statement not covered" >  width: number;</span>
    1130. 

  1130. <span class="cstat-no" title="statement not covered" >  height: number;</span>
    1131. 

  1131. <span class="cstat-no" title="statement not covered" >}</span>
    1132. 

  1132. <span class="cstat-no" title="statement not covered" ></span>
    1133. 

  1133. <span class="cstat-no" title="statement not covered" >/** 渲染结果 */</span>
    1134. 

  1134. <span class="cstat-no" title="statement not covered" >export interface BatchRenderResult {</span>
    1135. 

  1135. <span class="cstat-no" title="statement not covered" >  /** 渲染的DocumentFragment */</span>
    1136. 

  1136. <span class="cstat-no" title="statement not covered" >  fragment: DocumentFragment;</span>
    1137. 

  1137. <span class="cstat-no" title="statement not covered" >  /** 渲染的音符数量 */</span>
    1138. 

  1138. <span class="cstat-no" title="statement not covered" >  noteCount: number;</span>
    1139. 

  1139. <span class="cstat-no" title="statement not covered" >  /** 渲染耗时（毫秒） */</span>
    1140. 

  1140. <span class="cstat-no" title="statement not covered" >  duration: number;</span>
    1141. 

  1141. <span class="cstat-no" title="statement not covered" >  /** 创建的DOM节点数量 */</span>
    1142. 

  1142. <span class="cstat-no" title="statement not covered" >  nodeCount: number;</span>
    1143. 

  1143. <span class="cstat-no" title="statement not covered" >}</span>
    1144. 

  1144. <span class="cstat-no" title="statement not covered" ></span>
    1145. 

  1145. <span class="cstat-no" title="statement not covered" >// ==================== 默认配置 ====================</span>
    1146. 

  1146. <span class="cstat-no" title="statement not covered" ></span>
    1147. 

  1147. <span class="cstat-no" title="statement not covered" >const DEFAULT_CONFIG: BatchRendererConfig = {</span>
    1148. 

  1148. <span class="cstat-no" title="statement not covered" >  noteFontSize: 20,</span>
    1149. 

  1149. <span class="cstat-no" title="statement not covered" >  fontFamily: 'Arial, sans-serif',</span>
    1150. 

  1150. <span class="cstat-no" title="statement not covered" >  noteColor: '#000000',</span>
    1151. 

  1151. <span class="cstat-no" title="statement not covered" >  quarterNoteSpacing: 50,</span>
    1152. 

  1152. <span class="cstat-no" title="statement not covered" >  lineColor: '#000000',</span>
    1153. 

  1153. <span class="cstat-no" title="statement not covered" >  lyricFontSize: 14,</span>
    1154. 

  1154. <span class="cstat-no" title="statement not covered" >  lyricColor: '#333333',</span>
    1155. 

  1155. <span class="cstat-no" title="statement not covered" >  batchSize: 100,</span>
    1156. 

  1156. <span class="cstat-no" title="statement not covered" >  renderDurationLines: true,</span>
    1157. 

  1157. <span class="cstat-no" title="statement not covered" >  renderLyrics: true,</span>
    1158. 

  1158. <span class="cstat-no" title="statement not covered" >};</span>
    1159. 

  1159. <span class="cstat-no" title="statement not covered" ></span>
    1160. 

  1160. <span class="cstat-no" title="statement not covered" >// ==================== 主类 ====================</span>
    1161. 

  1161. <span class="cstat-no" title="statement not covered" ></span>
    1162. 

  1162. <span class="cstat-no" title="statement not covered" >/**</span>
    1163. 

  1163. <span class="cstat-no" title="statement not covered" > * 批量渲染器</span>
    1164. 

  1164. <span class="cstat-no" title="statement not covered" > */</span>
    1165. 

  1165. <span class="cstat-no" title="statement not covered" >export class BatchRenderer {</span>
    1166. 

  1166. <span class="cstat-no" title="statement not covered" >  /** 配置 */</span>
    1167. 

  1167. <span class="cstat-no" title="statement not covered" >  private config: Required&lt;BatchRendererConfig&gt;;</span>
    1168. 

  1168. <span class="cstat-no" title="statement not covered" >  </span>
    1169. 

  1169. <span class="cstat-no" title="statement not covered" >  /** 音符绘制器 */</span>
    1170. 

  1170. <span class="cstat-no" title="statement not covered" >  private noteDrawer: NoteDrawer;</span>
    1171. 

  1171. <span class="cstat-no" title="statement not covered" >  </span>
    1172. 

  1172. <span class="cstat-no" title="statement not covered" >  /** 线条绘制器 */</span>
    1173. 

  1173. <span class="cstat-no" title="statement not covered" >  private lineDrawer: LineDrawer;</span>
    1174. 

  1174. <span class="cstat-no" title="statement not covered" >  </span>
    1175. 

  1175. <span class="cstat-no" title="statement not covered" >  /** 歌词绘制器 */</span>
    1176. 

  1176. <span class="cstat-no" title="statement not covered" >  private lyricDrawer: LyricDrawer;</span>
    1177. 

  1177. <span class="cstat-no" title="statement not covered" >  </span>
    1178. 

  1178. <span class="cstat-no" title="statement not covered" >  /** 渲染统计 */</span>
    1179. 

  1179. <span class="cstat-no" title="statement not covered" >  private stats = {</span>
    1180. 

  1180. <span class="cstat-no" title="statement not covered" >    totalNotesRendered: 0,</span>
    1181. 

  1181. <span class="cstat-no" title="statement not covered" >    totalTimeSpent: 0,</span>
    1182. 

  1182. <span class="cstat-no" title="statement not covered" >    lastRenderDuration: 0,</span>
    1183. 

  1183. <span class="cstat-no" title="statement not covered" >  };</span>
    1184. 

  1184. <span class="cstat-no" title="statement not covered" ></span>
    1185. 

  1185. <span class="cstat-no" title="statement not covered" >  /**</span>
    1186. 

  1186. <span class="cstat-no" title="statement not covered" >   * 构造函数</span>
    1187. 

  1187. <span class="cstat-no" title="statement not covered" >   * @param config 配置选项</span>
    1188. 

  1188. <span class="cstat-no" title="statement not covered" >   */</span>
    1189. 

  1189. <span class="cstat-no" title="statement not covered" >  constructor(config: Partial&lt;BatchRendererConfig&gt; = {}) {</span>
    1190. 

  1190. <span class="cstat-no" title="statement not covered" >    this.config = { ...DEFAULT_CONFIG, ...config } as Required&lt;BatchRendererConfig&gt;;</span>
    1191. 

  1191. <span class="cstat-no" title="statement not covered" >    </span>
    1192. 

  1192. <span class="cstat-no" title="statement not covered" >    // 初始化绘制器</span>
    1193. 

  1193. <span class="cstat-no" title="statement not covered" >    this.noteDrawer = new NoteDrawer({</span>
    1194. 

  1194. <span class="cstat-no" title="statement not covered" >      noteFontSize: this.config.noteFontSize,</span>
    1195. 

  1195. <span class="cstat-no" title="statement not covered" >      fontFamily: this.config.fontFamily,</span>
    1196. 

  1196. <span class="cstat-no" title="statement not covered" >      noteColor: this.config.noteColor,</span>
    1197. 

  1197. <span class="cstat-no" title="statement not covered" >    });</span>
    1198. 

  1198. <span class="cstat-no" title="statement not covered" >    </span>
    1199. 

  1199. <span class="cstat-no" title="statement not covered" >    this.lineDrawer = new LineDrawer({</span>
    1200. 

  1200. <span class="cstat-no" title="statement not covered" >      quarterNoteSpacing: this.config.quarterNoteSpacing,</span>
    1201. 

  1201. <span class="cstat-no" title="statement not covered" >      noteFontSize: this.config.noteFontSize,</span>
    1202. 

  1202. <span class="cstat-no" title="statement not covered" >      lineColor: this.config.lineColor,</span>
    1203. 

  1203. <span class="cstat-no" title="statement not covered" >    });</span>
    1204. 

  1204. <span class="cstat-no" title="statement not covered" >    </span>
    1205. 

  1205. <span class="cstat-no" title="statement not covered" >    this.lyricDrawer = new LyricDrawer({</span>
    1206. 

  1206. <span class="cstat-no" title="statement not covered" >      fontSize: this.config.lyricFontSize,</span>
    1207. 

  1207. <span class="cstat-no" title="statement not covered" >      fontFamily: this.config.fontFamily,</span>
    1208. 

  1208. <span class="cstat-no" title="statement not covered" >      lyricColor: this.config.lyricColor,</span>
    1209. 

  1209. <span class="cstat-no" title="statement not covered" >    });</span>
    1210. 

  1210. <span class="cstat-no" title="statement not covered" >  }</span>
    1211. 

  1211. <span class="cstat-no" title="statement not covered" ></span>
    1212. 

  1212. <span class="cstat-no" title="statement not covered" >  /**</span>
    1213. 

  1213. <span class="cstat-no" title="statement not covered" >   * 批量渲染音符</span>
    1214. 

  1214. <span class="cstat-no" title="statement not covered" >   * </span>
    1215. 

  1215. <span class="cstat-no" title="statement not covered" >   * @param notes 音符数组</span>
    1216. 

  1216. <span class="cstat-no" title="statement not covered" >   * @param onProgress 进度回调（可选）</span>
    1217. 

  1217. <span class="cstat-no" title="statement not covered" >   * @returns DocumentFragment</span>
    1218. 

  1218. <span class="cstat-no" title="statement not covered" >   */</span>
    1219. 

  1219. <span class="cstat-no" title="statement not covered" >  renderNotes(notes: JianpuNote[], onProgress?: RenderProgressCallback): DocumentFragment {</span>
    1220. 

  1220. <span class="cstat-no" title="statement not covered" >    const startTime = performance.now();</span>
    1221. 

  1221. <span class="cstat-no" title="statement not covered" >    const fragment = document.createDocumentFragment();</span>
    1222. 

  1222. <span class="cstat-no" title="statement not covered" >    const total = notes.length;</span>
    1223. 

  1223. <span class="cstat-no" title="statement not covered" >    </span>
    1224. 

  1224. <span class="cstat-no" title="statement not covered" >    for (let i = 0; i &lt; notes.length; i++) {</span>
    1225. 

  1225. <span class="cstat-no" title="statement not covered" >      const note = notes[i];</span>
    1226. 

  1226. <span class="cstat-no" title="statement not covered" >      </span>
    1227. 

  1227. <span class="cstat-no" title="statement not covered" >      // 渲染音符</span>
    1228. 

  1228. <span class="cstat-no" title="statement not covered" >      const noteGroup = this.noteDrawer.drawNote(note);</span>
    1229. 

  1229. <span class="cstat-no" title="statement not covered" >      fragment.appendChild(noteGroup);</span>
    1230. 

  1230. <span class="cstat-no" title="statement not covered" >      </span>
    1231. 

  1231. <span class="cstat-no" title="statement not covered" >      // 渲染时值线（增时线或减时线）</span>
    1232. 

  1232. <span class="cstat-no" title="statement not covered" >      if (this.config.renderDurationLines) {</span>
    1233. 

  1233. <span class="cstat-no" title="statement not covered" >        const lineGroup = this.lineDrawer.drawDurationLines(note, this.config.quarterNoteSpacing);</span>
    1234. 

  1234. <span class="cstat-no" title="statement not covered" >        if (lineGroup.childNodes.length &gt; 0) {</span>
    1235. 

  1235. <span class="cstat-no" title="statement not covered" >          fragment.appendChild(lineGroup);</span>
    1236. 

  1236. <span class="cstat-no" title="statement not covered" >        }</span>
    1237. 

  1237. <span class="cstat-no" title="statement not covered" >      }</span>
    1238. 

  1238. <span class="cstat-no" title="statement not covered" >      </span>
    1239. 

  1239. <span class="cstat-no" title="statement not covered" >      // 渲染歌词</span>
    1240. 

  1240. <span class="cstat-no" title="statement not covered" >      if (this.config.renderLyrics &amp;&amp; note.lyrics &amp;&amp; note.lyrics.length &gt; 0) {</span>
    1241. 

  1241. <span class="cstat-no" title="statement not covered" >        const lyricGroup = this.lyricDrawer.drawLyricsForNote(note);</span>
    1242. 

  1242. <span class="cstat-no" title="statement not covered" >        if (lyricGroup) {</span>
    1243. 

  1243. <span class="cstat-no" title="statement not covered" >          fragment.appendChild(lyricGroup);</span>
    1244. 

  1244. <span class="cstat-no" title="statement not covered" >        }</span>
    1245. 

  1245. <span class="cstat-no" title="statement not covered" >      }</span>
    1246. 

  1246. <span class="cstat-no" title="statement not covered" >      </span>
    1247. 

  1247. <span class="cstat-no" title="statement not covered" >      // 进度回调</span>
    1248. 

  1248. <span class="cstat-no" title="statement not covered" >      if (onProgress &amp;&amp; (i % this.config.batchSize === 0 || i === notes.length - 1)) {</span>
    1249. 

  1249. <span class="cstat-no" title="statement not covered" >        onProgress({</span>
    1250. 

  1250. <span class="cstat-no" title="statement not covered" >          current: i + 1,</span>
    1251. 

  1251. <span class="cstat-no" title="statement not covered" >          total,</span>
    1252. 

  1252. <span class="cstat-no" title="statement not covered" >          percentage: ((i + 1) / total) * 100,</span>
    1253. 

  1253. <span class="cstat-no" title="statement not covered" >        });</span>
    1254. 

  1254. <span class="cstat-no" title="statement not covered" >      }</span>
    1255. 

  1255. <span class="cstat-no" title="statement not covered" >    }</span>
    1256. 

  1256. <span class="cstat-no" title="statement not covered" >    </span>
    1257. 

  1257. <span class="cstat-no" title="statement not covered" >    const duration = performance.now() - startTime;</span>
    1258. 

  1258. <span class="cstat-no" title="statement not covered" >    this.updateStats(notes.length, duration);</span>
    1259. 

  1259. <span class="cstat-no" title="statement not covered" >    </span>
    1260. 

  1260. <span class="cstat-no" title="statement not covered" >    return fragment;</span>
    1261. 

  1261. <span class="cstat-no" title="statement not covered" >  }</span>
    1262. 

  1262. <span class="cstat-no" title="statement not covered" ></span>
    1263. 

  1263. <span class="cstat-no" title="statement not covered" >  /**</span>
    1264. 

  1264. <span class="cstat-no" title="statement not covered" >   * 批量渲染小节</span>
    1265. 

  1265. <span class="cstat-no" title="statement not covered" >   * </span>
    1266. 

  1266. <span class="cstat-no" title="statement not covered" >   * @param measures 小节数组</span>
    1267. 

  1267. <span class="cstat-no" title="statement not covered" >   * @param onProgress 进度回调（可选）</span>
    1268. 

  1268. <span class="cstat-no" title="statement not covered" >   * @returns DocumentFragment</span>
    1269. 

  1269. <span class="cstat-no" title="statement not covered" >   */</span>
    1270. 

  1270. <span class="cstat-no" title="statement not covered" >  renderMeasures(measures: JianpuMeasure[], onProgress?: RenderProgressCallback): DocumentFragment {</span>
    1271. 

  1271. <span class="cstat-no" title="statement not covered" >    // 收集所有音符</span>
    1272. 

  1272. <span class="cstat-no" title="statement not covered" >    const allNotes: JianpuNote[] = [];</span>
    1273. 

  1273. <span class="cstat-no" title="statement not covered" >    for (const measure of measures) {</span>
    1274. 

  1274. <span class="cstat-no" title="statement not covered" >      for (const voice of measure.voices) {</span>
    1275. 

  1275. <span class="cstat-no" title="statement not covered" >        allNotes.push(...voice);</span>
    1276. 

  1276. <span class="cstat-no" title="statement not covered" >      }</span>
    1277. 

  1277. <span class="cstat-no" title="statement not covered" >    }</span>
    1278. 

  1278. <span class="cstat-no" title="statement not covered" >    </span>
    1279. 

  1279. <span class="cstat-no" title="statement not covered" >    return this.renderNotes(allNotes, onProgress);</span>
    1280. 

  1280. <span class="cstat-no" title="statement not covered" >  }</span>
    1281. 

  1281. <span class="cstat-no" title="statement not covered" ></span>
    1282. 

  1282. <span class="cstat-no" title="statement not covered" >  /**</span>
    1283. 

  1283. <span class="cstat-no" title="statement not covered" >   * 渲染可视区域内的音符（虚拟化渲染）</span>
    1284. 

  1284. <span class="cstat-no" title="statement not covered" >   * </span>
    1285. 

  1285. <span class="cstat-no" title="statement not covered" >   * @param notes 所有音符</span>
    1286. 

  1286. <span class="cstat-no" title="statement not covered" >   * @param viewport 可视区域</span>
    1287. 

  1287. <span class="cstat-no" title="statement not covered" >   * @param padding 额外渲染的边距（像素）</span>
    1288. 

  1288. <span class="cstat-no" title="statement not covered" >   * @returns 渲染结果</span>
    1289. 

  1289. <span class="cstat-no" title="statement not covered" >   */</span>
    1290. 

  1290. <span class="cstat-no" title="statement not covered" >  renderViewport(</span>
    1291. 

  1291. <span class="cstat-no" title="statement not covered" >    notes: JianpuNote[],</span>
    1292. 

  1292. <span class="cstat-no" title="statement not covered" >    viewport: ViewportRect,</span>
    1293. 

  1293. <span class="cstat-no" title="statement not covered" >    padding: number = 100</span>
    1294. 

  1294. <span class="cstat-no" title="statement not covered" >  ): BatchRenderResult {</span>
    1295. 

  1295. <span class="cstat-no" title="statement not covered" >    const startTime = performance.now();</span>
    1296. 

  1296. <span class="cstat-no" title="statement not covered" >    </span>
    1297. 

  1297. <span class="cstat-no" title="statement not covered" >    // 扩展可视区域（添加边距以预渲染即将可见的音符）</span>
    1298. 

  1298. <span class="cstat-no" title="statement not covered" >    const expandedViewport: ViewportRect = {</span>
    1299. 

  1299. <span class="cstat-no" title="statement not covered" >      x: viewport.x - padding,</span>
    1300. 

  1300. <span class="cstat-no" title="statement not covered" >      y: viewport.y - padding,</span>
    1301. 

  1301. <span class="cstat-no" title="statement not covered" >      width: viewport.width + padding * 2,</span>
    1302. 

  1302. <span class="cstat-no" title="statement not covered" >      height: viewport.height + padding * 2,</span>
    1303. 

  1303. <span class="cstat-no" title="statement not covered" >    };</span>
    1304. 

  1304. <span class="cstat-no" title="statement not covered" >    </span>
    1305. 

  1305. <span class="cstat-no" title="statement not covered" >    // 筛选可视区域内的音符</span>
    1306. 

  1306. <span class="cstat-no" title="statement not covered" >    const visibleNotes = notes.filter(note =&gt; this.isNoteInViewport(note, expandedViewport));</span>
    1307. 

  1307. <span class="cstat-no" title="statement not covered" >    </span>
    1308. 

  1308. <span class="cstat-no" title="statement not covered" >    // 渲染可见音符</span>
    1309. 

  1309. <span class="cstat-no" title="statement not covered" >    const fragment = this.renderNotes(visibleNotes);</span>
    1310. 

  1310. <span class="cstat-no" title="statement not covered" >    </span>
    1311. 

  1311. <span class="cstat-no" title="statement not covered" >    const duration = performance.now() - startTime;</span>
    1312. 

  1312. <span class="cstat-no" title="statement not covered" >    </span>
    1313. 

  1313. <span class="cstat-no" title="statement not covered" >    return {</span>
    1314. 

  1314. <span class="cstat-no" title="statement not covered" >      fragment,</span>
    1315. 

  1315. <span class="cstat-no" title="statement not covered" >      noteCount: visibleNotes.length,</span>
    1316. 

  1316. <span class="cstat-no" title="statement not covered" >      duration,</span>
    1317. 

  1317. <span class="cstat-no" title="statement not covered" >      nodeCount: this.countNodes(fragment),</span>
    1318. 

  1318. <span class="cstat-no" title="statement not covered" >    };</span>
    1319. 

  1319. <span class="cstat-no" title="statement not covered" >  }</span>
    1320. 

  1320. <span class="cstat-no" title="statement not covered" ></span>
    1321. 

  1321. <span class="cstat-no" title="statement not covered" >  /**</span>
    1322. 

  1322. <span class="cstat-no" title="statement not covered" >   * 检查音符是否在可视区域内</span>
    1323. 

  1323. <span class="cstat-no" title="statement not covered" >   * </span>
    1324. 

  1324. <span class="cstat-no" title="statement not covered" >   * @param note 音符</span>
    1325. 

  1325. <span class="cstat-no" title="statement not covered" >   * @param viewport 可视区域</span>
    1326. 

  1326. <span class="cstat-no" title="statement not covered" >   * @returns 是否可见</span>
    1327. 

  1327. <span class="cstat-no" title="statement not covered" >   */</span>
    1328. 

  1328. <span class="cstat-no" title="statement not covered" >  private isNoteInViewport(note: JianpuNote, viewport: ViewportRect): boolean {</span>
    1329. 

  1329. <span class="cstat-no" title="statement not covered" >    const noteWidth = note.width || 30;</span>
    1330. 

  1330. <span class="cstat-no" title="statement not covered" >    const noteHeight = note.height || 50;</span>
    1331. 

  1331. <span class="cstat-no" title="statement not covered" >    </span>
    1332. 

  1332. <span class="cstat-no" title="statement not covered" >    return (</span>
    1333. 

  1333. <span class="cstat-no" title="statement not covered" >      note.x + noteWidth &gt;= viewport.x &amp;&amp;</span>
    1334. 

  1334. <span class="cstat-no" title="statement not covered" >      note.x &lt;= viewport.x + viewport.width &amp;&amp;</span>
    1335. 

  1335. <span class="cstat-no" title="statement not covered" >      note.y + noteHeight &gt;= viewport.y &amp;&amp;</span>
    1336. 

  1336. <span class="cstat-no" title="statement not covered" >      note.y &lt;= viewport.y + viewport.height</span>
    1337. 

  1337. <span class="cstat-no" title="statement not covered" >    );</span>
    1338. 

  1338. <span class="cstat-no" title="statement not covered" >  }</span>
    1339. 

  1339. <span class="cstat-no" title="statement not covered" ></span>
    1340. 

  1340. <span class="cstat-no" title="statement not covered" >  /**</span>
    1341. 

  1341. <span class="cstat-no" title="statement not covered" >   * 计算DocumentFragment中的节点数量</span>
    1342. 

  1342. <span class="cstat-no" title="statement not covered" >   */</span>
    1343. 

  1343. <span class="cstat-no" title="statement not covered" >  private countNodes(fragment: DocumentFragment): number {</span>
    1344. 

  1344. <span class="cstat-no" title="statement not covered" >    let count = 0;</span>
    1345. 

  1345. <span class="cstat-no" title="statement not covered" >    const countChildren = (node: Node) =&gt; {</span>
    1346. 

  1346. <span class="cstat-no" title="statement not covered" >      count++;</span>
    1347. 

  1347. <span class="cstat-no" title="statement not covered" >      for (const child of Array.from(node.childNodes)) {</span>
    1348. 

  1348. <span class="cstat-no" title="statement not covered" >        countChildren(child);</span>
    1349. 

  1349. <span class="cstat-no" title="statement not covered" >      }</span>
    1350. 

  1350. <span class="cstat-no" title="statement not covered" >    };</span>
    1351. 

  1351. <span class="cstat-no" title="statement not covered" >    </span>
    1352. 

  1352. <span class="cstat-no" title="statement not covered" >    for (const child of Array.from(fragment.childNodes)) {</span>
    1353. 

  1353. <span class="cstat-no" title="statement not covered" >      countChildren(child);</span>
    1354. 

  1354. <span class="cstat-no" title="statement not covered" >    }</span>
    1355. 

  1355. <span class="cstat-no" title="statement not covered" >    </span>
    1356. 

  1356. <span class="cstat-no" title="statement not covered" >    return count;</span>
    1357. 

  1357. <span class="cstat-no" title="statement not covered" >  }</span>
    1358. 

  1358. <span class="cstat-no" title="statement not covered" ></span>
    1359. 

  1359. <span class="cstat-no" title="statement not covered" >  /**</span>
    1360. 

  1360. <span class="cstat-no" title="statement not covered" >   * 更新渲染统计</span>
    1361. 

  1361. <span class="cstat-no" title="statement not covered" >   */</span>
    1362. 

  1362. <span class="cstat-no" title="statement not covered" >  private updateStats(noteCount: number, duration: number): void {</span>
    1363. 

  1363. <span class="cstat-no" title="statement not covered" >    this.stats.totalNotesRendered += noteCount;</span>
    1364. 

  1364. <span class="cstat-no" title="statement not covered" >    this.stats.totalTimeSpent += duration;</span>
    1365. 

  1365. <span class="cstat-no" title="statement not covered" >    this.stats.lastRenderDuration = duration;</span>
    1366. 

  1366. <span class="cstat-no" title="statement not covered" >  }</span>
    1367. 

  1367. <span class="cstat-no" title="statement not covered" ></span>
    1368. 

  1368. <span class="cstat-no" title="statement not covered" >  /**</span>
    1369. 

  1369. <span class="cstat-no" title="statement not covered" >   * 获取渲染统计</span>
    1370. 

  1370. <span class="cstat-no" title="statement not covered" >   */</span>
    1371. 

  1371. <span class="cstat-no" title="statement not covered" >  getStats(): {</span>
    1372. 

  1372. <span class="cstat-no" title="statement not covered" >    totalNotesRendered: number;</span>
    1373. 

  1373. <span class="cstat-no" title="statement not covered" >    totalTimeSpent: number;</span>
    1374. 

  1374. <span class="cstat-no" title="statement not covered" >    lastRenderDuration: number;</span>
    1375. 

  1375. <span class="cstat-no" title="statement not covered" >    averageRenderTime: number;</span>
    1376. 

  1376. <span class="cstat-no" title="statement not covered" >  } {</span>
    1377. 

  1377. <span class="cstat-no" title="statement not covered" >    return {</span>
    1378. 

  1378. <span class="cstat-no" title="statement not covered" >      ...this.stats,</span>
    1379. 

  1379. <span class="cstat-no" title="statement not covered" >      averageRenderTime: this.stats.totalNotesRendered &gt; 0</span>
    1380. 

  1380. <span class="cstat-no" title="statement not covered" >        ? this.stats.totalTimeSpent / this.stats.totalNotesRendered</span>
    1381. 

  1381. <span class="cstat-no" title="statement not covered" >        : 0,</span>
    1382. 

  1382. <span class="cstat-no" title="statement not covered" >    };</span>
    1383. 

  1383. <span class="cstat-no" title="statement not covered" >  }</span>
    1384. 

  1384. <span class="cstat-no" title="statement not covered" ></span>
    1385. 

  1385. <span class="cstat-no" title="statement not covered" >  /**</span>
    1386. 

  1386. <span class="cstat-no" title="statement not covered" >   * 重置统计</span>
    1387. 

  1387. <span class="cstat-no" title="statement not covered" >   */</span>
    1388. 

  1388. <span class="cstat-no" title="statement not covered" >  resetStats(): void {</span>
    1389. 

  1389. <span class="cstat-no" title="statement not covered" >    this.stats = {</span>
    1390. 

  1390. <span class="cstat-no" title="statement not covered" >      totalNotesRendered: 0,</span>
    1391. 

  1391. <span class="cstat-no" title="statement not covered" >      totalTimeSpent: 0,</span>
    1392. 

  1392. <span class="cstat-no" title="statement not covered" >      lastRenderDuration: 0,</span>
    1393. 

  1393. <span class="cstat-no" title="statement not covered" >    };</span>
    1394. 

  1394. <span class="cstat-no" title="statement not covered" >  }</span>
    1395. 

  1395. <span class="cstat-no" title="statement not covered" ></span>
    1396. 

  1396. <span class="cstat-no" title="statement not covered" >  /**</span>
    1397. 

  1397. <span class="cstat-no" title="statement not covered" >   * 获取配置</span>
    1398. 

  1398. <span class="cstat-no" title="statement not covered" >   */</span>
    1399. 

  1399. <span class="cstat-no" title="statement not covered" >  getConfig(): Required&lt;BatchRendererConfig&gt; {</span>
    1400. 

  1400. <span class="cstat-no" title="statement not covered" >    return { ...this.config };</span>
    1401. 

  1401. <span class="cstat-no" title="statement not covered" >  }</span>
    1402. 

  1402. <span class="cstat-no" title="statement not covered" ></span>
    1403. 

  1403. <span class="cstat-no" title="statement not covered" >  /**</span>
    1404. 

  1404. <span class="cstat-no" title="statement not covered" >   * 更新配置</span>
    1405. 

  1405. <span class="cstat-no" title="statement not covered" >   */</span>
    1406. 

  1406. <span class="cstat-no" title="statement not covered" >  updateConfig(config: Partial&lt;BatchRendererConfig&gt;): void {</span>
    1407. 

  1407. <span class="cstat-no" title="statement not covered" >    Object.assign(this.config, config);</span>
    1408. 

  1408. <span class="cstat-no" title="statement not covered" >    </span>
    1409. 

  1409. <span class="cstat-no" title="statement not covered" >    // 重新初始化绘制器</span>
    1410. 

  1410. <span class="cstat-no" title="statement not covered" >    if (config.noteFontSize || config.fontFamily || config.noteColor) {</span>
    1411. 

  1411. <span class="cstat-no" title="statement not covered" >      this.noteDrawer = new NoteDrawer({</span>
    1412. 

  1412. <span class="cstat-no" title="statement not covered" >        noteFontSize: this.config.noteFontSize,</span>
    1413. 

  1413. <span class="cstat-no" title="statement not covered" >        fontFamily: this.config.fontFamily,</span>
    1414. 

  1414. <span class="cstat-no" title="statement not covered" >        noteColor: this.config.noteColor,</span>
    1415. 

  1415. <span class="cstat-no" title="statement not covered" >      });</span>
    1416. 

  1416. <span class="cstat-no" title="statement not covered" >    }</span>
    1417. 

  1417. <span class="cstat-no" title="statement not covered" >    </span>
    1418. 

  1418. <span class="cstat-no" title="statement not covered" >    if (config.quarterNoteSpacing || config.lineColor || config.noteFontSize) {</span>
    1419. 

  1419. <span class="cstat-no" title="statement not covered" >      this.lineDrawer = new LineDrawer({</span>
    1420. 

  1420. <span class="cstat-no" title="statement not covered" >        quarterNoteSpacing: this.config.quarterNoteSpacing,</span>
    1421. 

  1421. <span class="cstat-no" title="statement not covered" >        noteFontSize: this.config.noteFontSize,</span>
    1422. 

  1422. <span class="cstat-no" title="statement not covered" >        lineColor: this.config.lineColor,</span>
    1423. 

  1423. <span class="cstat-no" title="statement not covered" >      });</span>
    1424. 

  1424. <span class="cstat-no" title="statement not covered" >    }</span>
    1425. 

  1425. <span class="cstat-no" title="statement not covered" >    </span>
    1426. 

  1426. <span class="cstat-no" title="statement not covered" >    if (config.lyricFontSize || config.fontFamily || config.lyricColor) {</span>
    1427. 

  1427. <span class="cstat-no" title="statement not covered" >      this.lyricDrawer = new LyricDrawer({</span>
    1428. 

  1428. <span class="cstat-no" title="statement not covered" >        fontSize: this.config.lyricFontSize,</span>
    1429. 

  1429. <span class="cstat-no" title="statement not covered" >        fontFamily: this.config.fontFamily,</span>
    1430. 

  1430. <span class="cstat-no" title="statement not covered" >        lyricColor: this.config.lyricColor,</span>
    1431. 

  1431. <span class="cstat-no" title="statement not covered" >      });</span>
    1432. 

  1432. <span class="cstat-no" title="statement not covered" >    }</span>
    1433. 

  1433. <span class="cstat-no" title="statement not covered" >  }</span>
    1434. 

  1434. <span class="cstat-no" title="statement not covered" >}</span>
    1435. 

  1435. <span class="cstat-no" title="statement not covered" ></span>
    1436. 

  1436. <span class="cstat-no" title="statement not covered" >// ==================== 工厂函数 ====================</span>
    1437. 

  1437. <span class="cstat-no" title="statement not covered" ></span>
    1438. 

  1438. <span class="cstat-no" title="statement not covered" >/**</span>
    1439. 

  1439. <span class="cstat-no" title="statement not covered" > * 创建批量渲染器实例</span>
    1440. 

  1440. <span class="cstat-no" title="statement not covered" > * @param config 配置选项</span>
    1441. 

  1441. <span class="cstat-no" title="statement not covered" > * @returns BatchRenderer实例</span>
    1442. 

  1442. <span class="cstat-no" title="statement not covered" > */</span>
    1443. 

  1443. <span class="cstat-no" title="statement not covered" >export function createBatchRenderer(config?: Partial&lt;BatchRendererConfig&gt;): BatchRenderer {</span>
    1444. 

  1444. <span class="cstat-no" title="statement not covered" >  return new BatchRenderer(config);</span>
    1445. 

  1445. <span class="cstat-no" title="statement not covered" >}</span>
    1446. 

  1446. <span class="cstat-no" title="statement not covered" ></span>
    1447. 

  1447. <span class="cstat-no" title="statement not covered" >// ==================== 工具函数 ====================</span>
    1448. 

  1448. <span class="cstat-no" title="statement not covered" ></span>
    1449. 

  1449. <span class="cstat-no" title="statement not covered" >/**</span>
    1450. 

  1450. <span class="cstat-no" title="statement not covered" > * 快速批量渲染音符</span>
    1451. 

  1451. <span class="cstat-no" title="statement not covered" > * </span>
    1452. 

  1452. <span class="cstat-no" title="statement not covered" > * @param notes 音符数组</span>
    1453. 

  1453. <span class="cstat-no" title="statement not covered" > * @param config 配置选项</span>
    1454. 

  1454. <span class="cstat-no" title="statement not covered" > * @returns DocumentFragment</span>
    1455. 

  1455. <span class="cstat-no" title="statement not covered" > */</span>
    1456. 

  1456. <span class="cstat-no" title="statement not covered" >export function batchRenderNotes(</span>
    1457. 

  1457. <span class="cstat-no" title="statement not covered" >  notes: JianpuNote[],</span>
    1458. 

  1458. <span class="cstat-no" title="statement not covered" >  config?: Partial&lt;BatchRendererConfig&gt;</span>
    1459. 

  1459. <span class="cstat-no" title="statement not covered" >): DocumentFragment {</span>
    1460. 

  1460. <span class="cstat-no" title="statement not covered" >  const renderer = new BatchRenderer(config);</span>
    1461. 

  1461. <span class="cstat-no" title="statement not covered" >  return renderer.renderNotes(notes);</span>
    1462. 

  1462. <span class="cstat-no" title="statement not covered" >}</span>
    1463. 

  1463. <span class="cstat-no" title="statement not covered" ></span>
    1464. 

  1464. <span class="cstat-no" title="statement not covered" >/**</span>
    1465. 

  1465. <span class="cstat-no" title="statement not covered" > * 快速批量渲染小节</span>
    1466. 

  1466. <span class="cstat-no" title="statement not covered" > * </span>
    1467. 

  1467. <span class="cstat-no" title="statement not covered" > * @param measures 小节数组</span>
    1468. 

  1468. <span class="cstat-no" title="statement not covered" > * @param config 配置选项</span>
    1469. 

  1469. <span class="cstat-no" title="statement not covered" > * @returns DocumentFragment</span>
    1470. 

  1470. <span class="cstat-no" title="statement not covered" > */</span>
    1471. 

  1471. <span class="cstat-no" title="statement not covered" >export function batchRenderMeasures(</span>
    1472. 

  1472. <span class="cstat-no" title="statement not covered" >  measures: JianpuMeasure[],</span>
    1473. 

  1473. <span class="cstat-no" title="statement not covered" >  config?: Partial&lt;BatchRendererConfig&gt;</span>
    1474. 

  1474. <span class="cstat-no" title="statement not covered" >): DocumentFragment {</span>
    1475. 

  1475. <span class="cstat-no" title="statement not covered" >  const renderer = new BatchRenderer(config);</span>
    1476. 

  1476. <span class="cstat-no" title="statement not covered" >  return renderer.renderMeasures(measures);</span>
    1477. 

  1477. <span class="cstat-no" title="statement not covered" >}</span>
    1478. 

  1478. <span class="cstat-no" title="statement not covered" ></span>
    1479. 

  1479. <span class="cstat-no" title="statement not covered" >/**</span>
    1480. 

  1480. <span class="cstat-no" title="statement not covered" > * 分批渲染（用于大量音符，避免阻塞UI）</span>
    1481. 

  1481. <span class="cstat-no" title="statement not covered" > * </span>
    1482. 

  1482. <span class="cstat-no" title="statement not covered" > * @param notes 音符数组</span>
    1483. 

  1483. <span class="cstat-no" title="statement not covered" > * @param container 目标容器</span>
    1484. 

  1484. <span class="cstat-no" title="statement not covered" > * @param config 配置选项</span>
    1485. 

  1485. <span class="cstat-no" title="statement not covered" > * @param onProgress 进度回调</span>
    1486. 

  1486. <span class="cstat-no" title="statement not covered" > * @returns Promise，完成时resolve</span>
    1487. 

  1487. <span class="cstat-no" title="statement not covered" > */</span>
    1488. 

  1488. <span class="cstat-no" title="statement not covered" >export async function renderInBatches(</span>
    1489. 

  1489. <span class="cstat-no" title="statement not covered" >  notes: JianpuNote[],</span>
    1490. 

  1490. <span class="cstat-no" title="statement not covered" >  container: Element,</span>
    1491. 

  1491. <span class="cstat-no" title="statement not covered" >  config?: Partial&lt;BatchRendererConfig&gt;,</span>
    1492. 

  1492. <span class="cstat-no" title="statement not covered" >  onProgress?: RenderProgressCallback</span>
    1493. 

  1493. <span class="cstat-no" title="statement not covered" >): Promise&lt;void&gt; {</span>
    1494. 

  1494. <span class="cstat-no" title="statement not covered" >  const renderer = new BatchRenderer(config);</span>
    1495. 

  1495. <span class="cstat-no" title="statement not covered" >  const batchSize = config?.batchSize || 100;</span>
    1496. 

  1496. <span class="cstat-no" title="statement not covered" >  const total = notes.length;</span>
    1497. 

  1497. <span class="cstat-no" title="statement not covered" >  </span>
    1498. 

  1498. <span class="cstat-no" title="statement not covered" >  for (let i = 0; i &lt; notes.length; i += batchSize) {</span>
    1499. 

  1499. <span class="cstat-no" title="statement not covered" >    const batch = notes.slice(i, Math.min(i + batchSize, notes.length));</span>
    1500. 

  1500. <span class="cstat-no" title="statement not covered" >    const fragment = renderer.renderNotes(batch);</span>
    1501. 

  1501. <span class="cstat-no" title="statement not covered" >    container.appendChild(fragment);</span>
    1502. 

  1502. <span class="cstat-no" title="statement not covered" >    </span>
    1503. 

  1503. <span class="cstat-no" title="statement not covered" >    // 进度回调</span>
    1504. 

  1504. <span class="cstat-no" title="statement not covered" >    if (onProgress) {</span>
    1505. 

  1505. <span class="cstat-no" title="statement not covered" >      onProgress({</span>
    1506. 

  1506. <span class="cstat-no" title="statement not covered" >        current: Math.min(i + batchSize, total),</span>
    1507. 

  1507. <span class="cstat-no" title="statement not covered" >        total,</span>
    1508. 

  1508. <span class="cstat-no" title="statement not covered" >        percentage: (Math.min(i + batchSize, total) / total) * 100,</span>
    1509. 

  1509. <span class="cstat-no" title="statement not covered" >      });</span>
    1510. 

  1510. <span class="cstat-no" title="statement not covered" >    }</span>
    1511. 

  1511. <span class="cstat-no" title="statement not covered" >    </span>
    1512. 

  1512. <span class="cstat-no" title="statement not covered" >    // 让出执行权，避免阻塞UI</span>
    1513. 

  1513. <span class="cstat-no" title="statement not covered" >    await new Promise(resolve =&gt; setTimeout(resolve, 0));</span>
    1514. 

  1514. <span class="cstat-no" title="statement not covered" >  }</span>
    1515. 

  1515. <span class="cstat-no" title="statement not covered" >}</span>
    1516. 

  1516. <span class="cstat-no" title="statement not covered" ></span>
    1517. 

  1517. <span class="cstat-no" title="statement not covered" >/**</span>
    1518. 

  1518. <span class="cstat-no" title="statement not covered" > * 虚拟化渲染工具类</span>
    1519. 

  1519. <span class="cstat-no" title="statement not covered" > * </span>
    1520. 

  1520. <span class="cstat-no" title="statement not covered" > * 用于实现大列表的虚拟滚动渲染</span>
    1521. 

  1521. <span class="cstat-no" title="statement not covered" > */</span>
    1522. 

  1522. <span class="cstat-no" title="statement not covered" >export class VirtualizedRenderer {</span>
    1523. 

  1523. <span class="cstat-no" title="statement not covered" >  private renderer: BatchRenderer;</span>
    1524. 

  1524. <span class="cstat-no" title="statement not covered" >  private allNotes: JianpuNote[] = [];</span>
    1525. 

  1525. <span class="cstat-no" title="statement not covered" >  private renderedRange: { start: number; end: number } = { start: 0, end: 0 };</span>
    1526. 

  1526. <span class="cstat-no" title="statement not covered" >  private container: Element | null = null;</span>
    1527. 

  1527. <span class="cstat-no" title="statement not covered" >  </span>
    1528. 

  1528. <span class="cstat-no" title="statement not covered" >  constructor(config?: Partial&lt;BatchRendererConfig&gt;) {</span>
    1529. 

  1529. <span class="cstat-no" title="statement not covered" >    this.renderer = new BatchRenderer(config);</span>
    1530. 

  1530. <span class="cstat-no" title="statement not covered" >  }</span>
    1531. 

  1531. <span class="cstat-no" title="statement not covered" >  </span>
    1532. 

  1532. <span class="cstat-no" title="statement not covered" >  /**</span>
    1533. 

  1533. <span class="cstat-no" title="statement not covered" >   * 设置所有音符</span>
    1534. 

  1534. <span class="cstat-no" title="statement not covered" >   */</span>
    1535. 

  1535. <span class="cstat-no" title="statement not covered" >  setNotes(notes: JianpuNote[]): void {</span>
    1536. 

  1536. <span class="cstat-no" title="statement not covered" >    this.allNotes = notes;</span>
    1537. 

  1537. <span class="cstat-no" title="statement not covered" >    this.renderedRange = { start: 0, end: 0 };</span>
    1538. 

  1538. <span class="cstat-no" title="statement not covered" >  }</span>
    1539. 

  1539. <span class="cstat-no" title="statement not covered" >  </span>
    1540. 

  1540. <span class="cstat-no" title="statement not covered" >  /**</span>
    1541. 

  1541. <span class="cstat-no" title="statement not covered" >   * 设置渲染容器</span>
    1542. 

  1542. <span class="cstat-no" title="statement not covered" >   */</span>
    1543. 

  1543. <span class="cstat-no" title="statement not covered" >  setContainer(container: Element): void {</span>
    1544. 

  1544. <span class="cstat-no" title="statement not covered" >    this.container = container;</span>
    1545. 

  1545. <span class="cstat-no" title="statement not covered" >  }</span>
    1546. 

  1546. <span class="cstat-no" title="statement not covered" >  </span>
    1547. 

  1547. <span class="cstat-no" title="statement not covered" >  /**</span>
    1548. 

  1548. <span class="cstat-no" title="statement not covered" >   * 更新可视区域</span>
    1549. 

  1549. <span class="cstat-no" title="statement not covered" >   */</span>
    1550. 

  1550. <span class="cstat-no" title="statement not covered" >  updateViewport(viewport: ViewportRect, padding: number = 100): void {</span>
    1551. 

  1551. <span class="cstat-no" title="statement not covered" >    if (!this.container) return;</span>
    1552. 

  1552. <span class="cstat-no" title="statement not covered" >    </span>
    1553. 

  1553. <span class="cstat-no" title="statement not covered" >    const result = this.renderer.renderViewport(this.allNotes, viewport, padding);</span>
    1554. 

  1554. <span class="cstat-no" title="statement not covered" >    </span>
    1555. 

  1555. <span class="cstat-no" title="statement not covered" >    // 清空容器并添加新内容</span>
    1556. 

  1556. <span class="cstat-no" title="statement not covered" >    this.container.innerHTML = '';</span>
    1557. 

  1557. <span class="cstat-no" title="statement not covered" >    this.container.appendChild(result.fragment);</span>
    1558. 

  1558. <span class="cstat-no" title="statement not covered" >  }</span>
    1559. 

  1559. <span class="cstat-no" title="statement not covered" >  </span>
    1560. 

  1560. <span class="cstat-no" title="statement not covered" >  /**</span>
    1561. 

  1561. <span class="cstat-no" title="statement not covered" >   * 获取统计信息</span>
    1562. 

  1562. <span class="cstat-no" title="statement not covered" >   */</span>
    1563. 

  1563. <span class="cstat-no" title="statement not covered" >  getStats() {</span>
    1564. 

  1564. <span class="cstat-no" title="statement not covered" >    return {</span>
    1565. 

  1565. <span class="cstat-no" title="statement not covered" >      totalNotes: this.allNotes.length,</span>
    1566. 

  1566. <span class="cstat-no" title="statement not covered" >      ...this.renderer.getStats(),</span>
    1567. 

  1567. <span class="cstat-no" title="statement not covered" >    };</span>
    1568. 

  1568. <span class="cstat-no" title="statement not covered" >  }</span>
    1569. 

  1569. <span class="cstat-no" title="statement not covered" >}</span>
    1570. 

  1570. <span class="cstat-no" title="statement not covered" ></span>
    1571. 

  1571. <span class="cstat-no" title="statement not covered" >/**</span>
    1572. 

  1572. <span class="cstat-no" title="statement not covered" > * 创建虚拟化渲染器</span>
    1573. 

  1573. <span class="cstat-no" title="statement not covered" > */</span>
    1574. 

  1574. <span class="cstat-no" title="statement not covered" >export function createVirtualizedRenderer(config?: Partial&lt;BatchRendererConfig&gt;): VirtualizedRenderer {</span>
    1575. 

  1575. <span class="cstat-no" title="statement not covered" >  return new VirtualizedRenderer(config);</span>
    1576. 

  1576. <span class="cstat-no" title="statement not covered" >}</span>
    1577. 

  1577. &nbsp;
    1578. 

  1578. &nbsp;</pre></td></tr></table></pre>
    1579. 

  1579. 

  1580.                 <div class='push'></div><!-- for sticky footer -->
    1581. 

  1581.             </div><!-- /wrapper -->
    1582. 

  1582.             <div class='footer quiet pad2 space-top1 center small'>
    1583. 

  1583.                 Code coverage generated by
    1584. 

  1584.                 <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
    1585. 

  1585.                 at 2026-01-30T13:40:00.128Z
    1586. 

  1586.             </div>
    1587. 

  1587.         <script src="../../prettify.js"></script>
    1588. 

  1588.         <script>
    1589. 

  1589.             window.onload = function () {
    1590. 

  1590.                 prettyPrint();
    1591. 

  1591.             };
    1592. 

  1592.         </script>
    1593. 

  1593.         <script src="../../sorter.js"></script>
    1594. 

  1594.         <script src="../../block-navigation.js"></script>
    1595. 

  1595.     </body>
    1596. 

  1596. </html>
    1597. 

  1597.     
    1598.