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PDF: use a map, not a hash, to write the dest roots name tree

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A PDF name tree is sorted, so just use a sorted data structure for that.
This simplifies the code.

This work has been kindly sponsored by the QGIS project
(https://qgis.org/).

Change-Id: Ib08b14aaf79c9180319efe7fefa9e797a4364d54
Reviewed-by: Albert Astals Cid <aacid@kde.org>
This commit is contained in:
Giuseppe D'Angelo 2024-05-16 21:32:31 +02:00
parent 2f9c72028d
commit 0dca6c40e1
1 changed files with 8 additions and 8 deletions
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16
src/gui/painting/qpdf.cpp
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@ -23,6 +23,8 @@
#include <qtimezone.h>
#include <quuid.h>
#include <map>
#ifndef QT_NO_COMPRESS
#include <zlib.h>
#endif
@ -1857,7 +1859,7 @@ void QPdfEnginePrivate::writeDestsRoot()
if (destCache.isEmpty())
return;
QHash<QString, int> destObjects;
std::map<QString, int> destObjects;
QByteArray xs, ys;
for (const DestInfo &destInfo : std::as_const(destCache)) {
int destObj = addXrefEntry(-1);
@ -1865,21 +1867,19 @@ void QPdfEnginePrivate::writeDestsRoot()
ys.setNum(static_cast<double>(destInfo.coords.y()), 'f');
xprintf("[%d 0 R /XYZ %s %s 0]\n", destInfo.pageObj, xs.constData(), ys.constData());
xprintf("endobj\n");
destObjects.insert(destInfo.anchor, destObj);
destObjects.insert_or_assign(destInfo.anchor, destObj);
}
// names
destsRoot = addXrefEntry(-1);
QStringList anchors = destObjects.keys();
anchors.sort();
xprintf("<<\n/Limits [");
printString(anchors.constFirst());
printString(destObjects.begin()->first);
xprintf(" ");
printString(anchors.constLast());
printString(destObjects.rbegin()->first);
xprintf("]\n/Names [\n");
for (const QString &anchor : std::as_const(anchors)) {
for (const auto &[anchor, destObject] : destObjects) {
printString(anchor);
xprintf(" %d 0 R\n", destObjects[anchor]);
xprintf(" %d 0 R\n", destObject);
}
xprintf("]\n>>\n"
"endobj\n");