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Public Member Functions | List of all members
PDFPageBatchProcessor Class Reference
PDF

The PDFPageBatchProcessor class controls the `start`, `flush`, and `end` cycles of a batch processor, and calling property update methods within the batch processor declaration cycle can greatly improve performance. More...

## Public Member Functions
Promise< void > | end ()
| End this bacth processor, and flush all cached operations. This method must be called within the finally block of `try{}finally{}`. More...
Promise< void > | flush ()
| Flush all cached operations before ending. More...
Promise< void > | start ()
| Start this batch procesor, after starting we can update the properties of the PDF object. More...

## Detailed Description

The PDFPageBatchProcessor class controls the `start`, `flush`, and `end` cycles of a batch processor, and calling property update methods within the batch processor declaration cycle can greatly improve performance.

Note
  Currently this APIs is only available for GraphicsObject.

Since
  9.0.0 Example:
  async function updateAllTextObjects(pageIndex) {
  const curDoc = await pdfui.getCurrentPDFDoc();
  const page = await curDoc.getPageByIndex(pageIndex);
  const graphicsObjectCount = await page.getGraphicsObjectsCount();
  const batch = page.getBatchProcessor();
  try {
  batch.start();
  for (let i = 0; i < graphicsObjectCount; i++) {
  const pageObj = await page.getGraphicsObjectByIndex(i);
  if(!pageObj) {
  continue;
  }
  var objType = pageObj.getType();
  if (objType == 1) { // Text Object
  await pageObj.setOpacity(1);
  await pageObj.setFillColor(0xFF000000 | Math.floor(0xFFFFFF * Math.random()));
  }
  }
  } finally {
  batch.end();
  }
  }

## Member Function Documentation

## ◆ end()

Promise<void> PDFPageBatchProcessor::end | ( |  | ) |

End this bacth processor, and flush all cached operations. This method must be called within the finally block of `try{}finally{}`.

Since
  9.0.0

Returns
  Promise<void> -

## ◆ flush()

Promise<void> PDFPageBatchProcessor::flush | ( |  | ) |

Flush all cached operations before ending.

Since
  9.0.0

Returns
  Promise<void> -

## ◆ start()

Promise<void> PDFPageBatchProcessor::start | ( |  | ) |

Start this batch procesor, after starting we can update the properties of the PDF object.

Since
  9.0.0

Returns
  Promise<void> -

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