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Merge pull request #8488 from mukulmishra18/streams-getTextContent

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Streams get text content
This commit is contained in:
Yury Delendik 2017-06-23 12:52:13 -05:00 • committed by GitHub
commit e2ca894fec
8 changed files with 275 additions and 114 deletions
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44
src/display/api.js
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@ -954,6 +954,24 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
return intentState.opListReadCapability.promise;
},
/**
* @param {getTextContentParameters} params - getTextContent parameters.
* @return {ReadableStream} ReadableStream to read textContent chunks.
*/
streamTextContent(params = {}) {
const TEXT_CONTENT_CHUNK_SIZE = 100;
return this.transport.messageHandler.sendWithStream('GetTextContent', {
pageIndex: this.pageNumber - 1,
normalizeWhitespace: (params.normalizeWhitespace === true),
combineTextItems: (params.disableCombineTextItems !== true),
}, {
highWaterMark: TEXT_CONTENT_CHUNK_SIZE,
size(textContent) {
return textContent.items.length;
},
});
},
/**
* @param {getTextContentParameters} params - getTextContent parameters.
* @return {Promise} That is resolved a {@link TextContent}
@ -961,10 +979,28 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
*/
getTextContent: function PDFPageProxy_getTextContent(params) {
params = params || {};
return this.transport.messageHandler.sendWithPromise('GetTextContent', {
pageIndex: this.pageNumber - 1,
normalizeWhitespace: (params.normalizeWhitespace === true),
combineTextItems: (params.disableCombineTextItems !== true),
let readableStream = this.streamTextContent(params);
return new Promise(function(resolve, reject) {
function pump() {
reader.read().then(function({ value, done, }) {
if (done) {
resolve(textContent);
return;
}
Util.extendObj(textContent.styles, value.styles);
Util.appendToArray(textContent.items, value.items);
pump();
}, reject);
}
let reader = readableStream.getReader();
let textContent = {
items: [],
styles: Object.create(null),
};
pump();
});
},