[okular] [Bug 491459] New: Rotated pdf page: Highlighter and Text extractor fail

[Leonard Mada]

https://bugs.kde.org/show_bug.cgi?id=491459

            Bug ID: 491459
           Summary: Rotated pdf page: Highlighter and Text extractor fail
    Classification: Applications
           Product: okular
           Version: 23.08.1
          Platform: Other
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: leo.mada at syonic.eu
  Target Milestone: ---

Created attachment 172420
  --> https://bugs.kde.org/attachment.cgi?id=172420&action=edit
PDF document (zipped) with rotated page

Highlighter and Text extractor fail on rotated pdf-pages

SUMMARY
Some pdf documents include rotated pages (see attached pdf-file). The
Highlighter tool fails to properly highlight the corresponding text. The text
selection tool (including the Area selector) fail to properly select the
corresponding text.

Rotating clockwise does not correct the errors.

STEPS TO REPRODUCE
1. Open attached pdf file
2. Go to page 7, which is rotated
3.a. Select highlighter and try to highlight e.g. "Homo sapiens"
3.b. Select "Text selection" and try to copy the first peptide sequence
("KEFSEV...")
3.c. Select the "Area selection" and try to copy the same first sequence
4. Repeat the steps with the page rotated clockwise

OBSERVED RESULT
3.a. The highlighting is very wrong and very annoying.
3.b. Nothing useful is selected
3.c. If the area is narrow enough, then something usable can be selected.
However, the text is rebersed!
"V
 Y K E L D Q I R G E V  E  S   F  E  K "
=> should be "KEFSEV..."
Note: MS Edge is actually able to select the proper text: "KEFSEVEGRIQDLEKYV",
even without rotating the page!


EXPECTED RESULT
Highlighter should highlight the proper line. Text selection should select line
by line.

SOFTWARE/OS VERSIONS
Windows: 10

ADDITIONAL INFORMATION
Is partly related to:
https://bugs.kde.org/show_bug.cgi?id=334297
- but that bug does not mention the Text selection;
- the page in this bug is also slightly more complex;

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