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XFA - Support text search in XFA documents.

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Moves the logic out of TextLayerBuilder to handle
highlighting matches into a new separate class `TextHighlighter`
that can be used with regular PDFs and XFA PDFs.

To mimic the current find functionality in XFA, two arrays
from the XFA rendering are created to get the text content
and map those to DOM nodes.

Fixes #13878
This commit is contained in:
Brendan Dahl 2021-08-18 17:02:29 -07:00
parent 3c8ee25e05
commit bb47128864
11 changed files with 531 additions and 238 deletions
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8
src/display/api.js
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@ -62,6 +62,7 @@ import { MessageHandler } from "../shared/message_handler.js";
import { Metadata } from "./metadata.js";
import { OptionalContentConfig } from "./optional_content_config.js";
import { PDFDataTransportStream } from "./transport_stream.js";
import { XfaText } from "./xfa_text.js";
const DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536
const RENDERING_CANCELLED_TIMEOUT = 100; // ms
@ -1561,6 +1562,13 @@ class PDFPageProxy {
* {@link TextContent} object that represents the page's text content.
*/
getTextContent(params = {}) {
if (this._transport._htmlForXfa) {
// TODO: We need to revisit this once the XFA foreground patch lands and
// only do this for non-foreground XFA.
return this.getXfa().then(xfa => {
return XfaText.textContent(xfa);
});
}
const readableStream = this.streamTextContent(params);
return new Promise(function (resolve, reject) {