[
https://issues.apache.org/jira/browse/PDFBOX-4252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xin Lin updated PDFBOX-4252:
----------------------------
Description:
There are several issues related to either PDListBox or PDComboBox that are
still not fixed in 2.0.10, I am going to put them in this one case, let me know
if they need to be broken into separate tickets. Thanks.
1. When I attempt to set value to a PDListBox whose 'Top Index' is greater than
0 (as in [^top index 3.pdf]), I always receive the following exception:
{noformat}
java.lang.IllegalStateException: Error: You must call beginText() before
calling endText.
at
org.apache.pdfbox.pdmodel.PDPageContentStream.endText(PDPageContentStream.java:381)
~[pdfbox-2.0.10.jar:2.0.10]
...
{noformat}
I tracked it down to a for loop at the end of the private method
insertGeneratedListboxAppearance in the class AppearanceGeneratorHelper:
{code:java}
for (int i = topIndex; i < numOptions; i++)
{
if (i == topIndex)
{
yTextPos = yTextPos - font.getFontDescriptor().getAscent() /
FONTSCALE * fontSize;
}
else
{
yTextPos = yTextPos - font.getBoundingBox().getHeight() /
FONTSCALE * fontSize;
contents.beginText();
}
contents.newLineAtOffset(contentRect.getLowerLeftX(), yTextPos);
contents.showText(options.get(i));
if (i - topIndex != (numOptions - 1))
{
contents.endText();
}
}
{code}
The last 'if' clause, when topIndex == 0, this makes sense, which is to NOT
call endText if we are at the last option because the private method
insertGeneratedAppearance which calls insertGeneratedListboxAppearance would
later call endText once again. If topIndex > 0, the condition in this 'if'
clause would never come true, as a result, endText is called every time in this
'for' loop, so after the method returns and the next endText is called, we
receive the exception. If I change that to
{code:java}
if (i != (numOptions - 1))
{
contents.endText();
}
{code}
things would start to work again.
2. a related issue, suppose I have a list box with top index equals to 0 and
too many options for the list box to show all of them at once (as in [^top
index 0.pdf]). When I select an option that is not visible with a top index of
0 (in order to see it, we need to scroll the list box down), unlike Acrobat
which would adjust the top index so the selected option would be visible,
PDFBox does not recalculate the top index and would stick with the initial
value of 0. This would make it useless if I flatten the document since there is
no way I can see the selected option (see [^top index 0 flattened.pdf]). It is
also next to impossible to see the selected index even if I do not flatten it
(see [^top index 0 with index 4 set as selected.pdf]). I would expect PDFBox
to recalculate the top index so that at least the first selected option is
visible (if there are additional selected options, show more options when
possible)
3. When flattening, drop down list or PDComboBox with options that have export
values only shows the export values instead of the label. This not a problem
for the list box. (e.g. form: [^test listbox and droplist export values.pdf],
after flattening: [^test listbox_and_droplist export values flattened.pdf]). I
would expect the drop down list to behave the same as list box (i.e. when
flattened, it should also show the label instead of the export value.)
was:
There are several issues related to either PDListBox or PDComboBox that are
still not fixed in 2.0.10, I am going to put them in this one case, let me know
if they need to be broken into separate tickets. Thanks.
1. When I attempt to set value to a PDListBox whose 'Top Index' is greater than
0 (as in [^top index 3.pdf]), I always receive the following exception:
{noformat}
java.lang.IllegalStateException: Error: You must call beginText() before
calling endText.
at
org.apache.pdfbox.pdmodel.PDPageContentStream.endText(PDPageContentStream.java:381)
~[pdfbox-2.0.10.jar:2.0.10]
...
{noformat}
I tracked it down to a for loop at the end of the private method
insertGeneratedListboxAppearance in the class AppearanceGeneratorHelper:
{code:java}
for (int i = topIndex; i < numOptions; i++)
{
if (i == topIndex)
{
yTextPos = yTextPos - font.getFontDescriptor().getAscent() /
FONTSCALE * fontSize;
}
else
{
yTextPos = yTextPos - font.getBoundingBox().getHeight() /
FONTSCALE * fontSize;
contents.beginText();
}
contents.newLineAtOffset(contentRect.getLowerLeftX(), yTextPos);
contents.showText(options.get(i));
if (i - topIndex != (numOptions - 1))
{
contents.endText();
}
}
{code}
The last 'if' clause, when topIndex == 0, this makes sense, which is to NOT
call endText if we are at the last option because the private method
insertGeneratedAppearance which calls insertGeneratedListboxAppearance would
later call endText once again. If topIndex > 0, the condition in this 'if'
clause would never come true, as a result, endText is called every time in this
'for' loop, so after the method returns and the next endText is called, we
receive the exception. If I change that to
{code:java}
if (i != (numOptions - 1))
{
contents.endText();
}
{code}
things would start to work again.
2. a related issue, suppose I have a list box with top index equals to 0 and
too many options for the list box to show all of them at once (as in [^top
index 0.pdf]). When I select an option needs to be scrolled down to see, unless
Acrobat which would adjust the top index so the selected option would be
visible, PDFBox does not recalculate the top index and would stick with the
initial value of 0. This would make it useless if I flatten the document since
there is no way I can see the selected option (see [^top index 0
flattened.pdf]). It is also next to impossible to see the selected index even
if I do not flatten it (see [^top index 0 with index 4 set as selected.pdf]).
I would expect PDFBox to recalculate the top index so that at least the first
selected option is visible (if there are additional selected options, show more
options when possible)
3. When flattening, drop down list or PDComboBox with options that have export
values only shows the export values instead of the label. This not a problem
for the list box. (e.g. form: [^test listbox and droplist export values.pdf],
after flattening: [^test listbox_and_droplist export values flattened.pdf]). I
would expect the drop down list when flattened also show the label instead of
the export value.
> PDChoice related bugs and issues
> --------------------------------
>
> Key: PDFBOX-4252
> URL: https://issues.apache.org/jira/browse/PDFBOX-4252
> Project: PDFBox
> Issue Type: Bug
> Components: AcroForm
> Reporter: Xin Lin
> Priority: Major
> Attachments: test listbox and droplist export values.pdf, test
> listbox_and_droplist export values flattened.pdf, top index 0 flattened.pdf,
> top index 0 with index 4 set as selected.pdf, top index 0.pdf, top index 3.pdf
>
>
> There are several issues related to either PDListBox or PDComboBox that are
> still not fixed in 2.0.10, I am going to put them in this one case, let me
> know if they need to be broken into separate tickets. Thanks.
> 1. When I attempt to set value to a PDListBox whose 'Top Index' is greater
> than 0 (as in [^top index 3.pdf]), I always receive the following exception:
> {noformat}
> java.lang.IllegalStateException: Error: You must call beginText() before
> calling endText.
> at
> org.apache.pdfbox.pdmodel.PDPageContentStream.endText(PDPageContentStream.java:381)
> ~[pdfbox-2.0.10.jar:2.0.10]
> ...
> {noformat}
> I tracked it down to a for loop at the end of the private method
> insertGeneratedListboxAppearance in the class AppearanceGeneratorHelper:
> {code:java}
> for (int i = topIndex; i < numOptions; i++)
> {
>
> if (i == topIndex)
> {
> yTextPos = yTextPos - font.getFontDescriptor().getAscent() /
> FONTSCALE * fontSize;
> }
> else
> {
> yTextPos = yTextPos - font.getBoundingBox().getHeight() /
> FONTSCALE * fontSize;
> contents.beginText();
> }
> contents.newLineAtOffset(contentRect.getLowerLeftX(), yTextPos);
> contents.showText(options.get(i));
> if (i - topIndex != (numOptions - 1))
> {
> contents.endText();
> }
> }
> {code}
> The last 'if' clause, when topIndex == 0, this makes sense, which is to NOT
> call endText if we are at the last option because the private method
> insertGeneratedAppearance which calls insertGeneratedListboxAppearance would
> later call endText once again. If topIndex > 0, the condition in this 'if'
> clause would never come true, as a result, endText is called every time in
> this 'for' loop, so after the method returns and the next endText is called,
> we receive the exception. If I change that to
> {code:java}
> if (i != (numOptions - 1))
> {
> contents.endText();
> }
> {code}
> things would start to work again.
> 2. a related issue, suppose I have a list box with top index equals to 0 and
> too many options for the list box to show all of them at once (as in [^top
> index 0.pdf]). When I select an option that is not visible with a top index
> of 0 (in order to see it, we need to scroll the list box down), unlike
> Acrobat which would adjust the top index so the selected option would be
> visible, PDFBox does not recalculate the top index and would stick with the
> initial value of 0. This would make it useless if I flatten the document
> since there is no way I can see the selected option (see [^top index 0
> flattened.pdf]). It is also next to impossible to see the selected index even
> if I do not flatten it (see [^top index 0 with index 4 set as
> selected.pdf]). I would expect PDFBox to recalculate the top index so that at
> least the first selected option is visible (if there are additional selected
> options, show more options when possible)
> 3. When flattening, drop down list or PDComboBox with options that have
> export values only shows the export values instead of the label. This not a
> problem for the list box. (e.g. form: [^test listbox and droplist export
> values.pdf], after flattening: [^test listbox_and_droplist export values
> flattened.pdf]). I would expect the drop down list to behave the same as list
> box (i.e. when flattened, it should also show the label instead of the export
> value.)
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