deadcxap/liberama
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Улучшение конвертирования Pdf

Browse Source
This commit is contained in:
Book Pauk
2019-02-28 23:02:34 +07:00
parent b06e600946
commit c9b65a3c43
2 changed files with 30 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
server/core/BookConverter/ConvertHtml.js
View File

@@ -109,13 +109,20 @@ class ConvertHtml extends ConvertBase {
//подозрение на чистый текст, надо разбить на параграфы
if (isText || pars.length < buf.length/2000) {
let total = 0;
let max = 0;
for (let i = 0; i < spaceCounter.length; i++) {
total += (spaceCounter[i] ? spaceCounter[i] : 0);
const sc = (spaceCounter[i] ? spaceCounter[i] : 0);
max = (sc > max ? sc : max);
total += sc;
}
total /= 20;
let i = spaceCounter.length - 1;
while (i > 0 && (!spaceCounter[i] || spaceCounter[i] < total)) i--;
let i = 0;
//если разброс не слишком большой
if (total < max*2) {
total /= 20;
i = spaceCounter.length - 1;
while (i > 0 && (!spaceCounter[i] || spaceCounter[i] < total)) i--;
}
const parIndent = (i > 0 ? i : 0);

38
server/core/BookConverter/ConvertPdf.js
View File

@@ -22,16 +22,21 @@ class ConvertPdf extends ConvertHtml {
const outFile = `${inputFiles.fileListDir}/${utils.randomHexString(10)}.xml`;
//конвертируем в xml
await this.execConverter(this.pdfToHtmlPath, ['-c', '-s', '-xml', inputFiles.sourceFile, outFile]);
callback(50);
let perc = 0;
await this.execConverter(this.pdfToHtmlPath, ['-c', '-s', '-xml', inputFiles.sourceFile, outFile], () => {
perc = (perc < 80 ? perc + 10 : 40);
callback(perc);
});
callback(80);
const data = await fs.readFile(outFile);
callback(60);
callback(90);
//парсим xml
let lines = [];
let inText = false;
let title = '';
let prevTop = 0;
let i = -1;
const onTextNode = (text, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
@@ -48,16 +53,19 @@ class ConvertPdf extends ConvertHtml {
let attrs = sax.getAttrsSync(tail);
const line = {
text: '',
top: (attrs.top && attrs.top.value ? attrs.top.value : null),
left: (attrs.left && attrs.left.value ? attrs.left.value : null),
width: (attrs.width && attrs.width.value ? attrs.width.value : null),
height: (attrs.height && attrs.height.value ? attrs.height.value : null),
top: parseInt((attrs.top && attrs.top.value ? attrs.top.value : null), 10),
left: parseInt((attrs.left && attrs.left.value ? attrs.left.value : null), 10),
width: parseInt((attrs.width && attrs.width.value ? attrs.width.value : null), 10),
height: parseInt((attrs.height && attrs.height.value ? attrs.height.value : null), 10),
};
if (line.width !== '0' || line.height !== '0') {
inText = true;
i++;
lines[i] = line;
if (isNaN(line.top) || isNaN(prevTop) || (Math.abs(prevTop - line.top) > 3)) {
i++;
lines[i] = line;
}
prevTop = line.top;
}
}
}
@@ -76,16 +84,8 @@ class ConvertPdf extends ConvertHtml {
//найдем параграфы и отступы
const indents = [];
for (const line of lines) {
const top = parseInt(line.top);
const left = parseInt(line.left);
if (!isNaN(top)) {
line.top = top;
}
if (!isNaN(left)) {
indents[left] = 1;
line.left = left;
if (!isNaN(line.left)) {
indents[line.left] = 1;
}
}