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https://issues.apache.org/jira/browse/PDFBOX-2400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14955126#comment-14955126
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Tilman Hausherr commented on PDFBOX-2400:
-----------------------------------------
My attempt at this:
{code}
/**
* Insert a page before another page within a page tree.
*
* @param nextPage the page that is to be after the new page.
* @param newPage the page to be inserted.
* @throws IllegalArgumentException if one attempts to insert a page that
isn't part of a page
* tree.
*/
public void insertBefore(PDPage nextPage, PDPage newPage)
{
COSDictionary nextPageDict = nextPage.getCOSObject();
COSDictionary parentDict = (COSDictionary)
nextPageDict.getDictionaryObject(COSName.PARENT);
COSArray kids = (COSArray) parentDict.getDictionaryObject(COSName.KIDS);
boolean found = false;
for (int i = 0; i < kids.size(); ++i)
{
COSDictionary pageDict = (COSDictionary) kids.getObject(i);
if (pageDict.equals(nextPage.getCOSObject()))
{
kids.add(i, newPage.getCOSObject());
newPage.getCOSObject().setItem(COSName.PARENT, parentDict);
found = true;
break;
}
}
if (!found)
{
throw new IllegalArgumentException("attempted to insert before
orphan page");
}
// now increase every parent
do
{
int cnt = parentDict.getInt(COSName.COUNT);
parentDict.setInt(COSName.COUNT, cnt + 1);
parentDict = (COSDictionary)
parentDict.getDictionaryObject(COSName.PARENT);
}
while (parentDict != null);
}
{code}
to test:
{code}
PDPage newPage = new PDPage();
PDPage nextPage = doc.getPage(23);
insertBefore(nextPage, newPage);
{code}
> Add insertPage() method
> -----------------------
>
> Key: PDFBOX-2400
> URL: https://issues.apache.org/jira/browse/PDFBOX-2400
> Project: PDFBox
> Issue Type: New Feature
> Components: PDModel
> Affects Versions: 1.8.7, 2.0.0
> Reporter: Patrick Tucker
> Priority: Minor
> Fix For: 2.1.0
>
>
> It would be nice if PDDocument had an insertPage function similar to addPage,
> but takes a number to indicate where to add the new page in the current set
> of pages.
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