| 词条 | Okular |
| 释义 |
| name = Okular | logo = Breezeicons-apps-48-okular.svg | logo size = 128px | screenshot = Okularkde4.png | caption = Okular showing a PDF in KDE SC 4 | author = Piotr Szymański | developer = The Okular Team | released = {{Start date and age|2005}}[1][2] | latest release version = 1.6[3] | latest release date = {{Start date and age|2018|12|13|df=yes/no}} | programming language = C++ | operating system = Linux, Unix-like | genre = Universal document viewer | license = GNU General Public License | website = {{URL|okular.kde.org}} }} Okular is the multiplatform document viewer developed by the KDE community and based on Qt and KDE Frameworks libraries. It is distributed as part of the KDE Applications bundle. It was originally based on KPDF and it replaced KPDF, KGhostView, KFax, KFaxview and KDVI in KDE 4. Its functionality can be easily embedded in other applications. HistoryOkular was started for the Google Summer of Code of 2005; Piotr Szymański was the accepted student.[1][2] Okular was identified as a success story of the 2007 Season of Usability.[4] In this season the Okular toolbar mockup was created based on an analysis of other popular document viewers and a usage survey. When it was ported to Qt 5 in December 2016, the version numbering jumped from 0.26 to 1.0.[5] FeaturesOkular's annotation features include commenting on PDF documents, highlighting and drawing lines, geometric shapes, adding textboxes, and stamps. Annotations are stored separately from the unmodified PDF file, or (since version 0.15 with Poppler 0.20[6]) can be saved in the document as standard PDF annotations. Text can be extracted to a text file. It is possible to select parts of the document and copy the text or image to the clipboard. Other features include reading text aloud using the Qt Speech module part of Qt since Qt 5 (previously using the Jovie,[7][8]), trimming of white page borders and setting of bookmarks. File format supportIt supports the following file formats:[9]
The official version obeys the DRM restrictions of PDF files by default, which may prevent copying, printing, or converting some PDF files. This can be turned off in the options under "Obey DRM limitations", however.[11][12][13][14] See also{{Portal|Free and open-source software}}
References1. ^1 KDE Developer's Corner - Google Summer of Code 2005 Projects {{webarchive|url=https://web.archive.org/web/20060628143503/http://developer.kde.org/summerofcode/soc2005.html |date=2006-06-28 }} 2. ^1 KDE Developer's Corner - Okular {{webarchive|url=https://web.archive.org/web/20051211001827/http://developer.kde.org/summerofcode/okular.html |date=2005-12-11 }} 3. ^https://okular.kde.org/news.php#itemOkular16released 4. ^Season of Usability Published on September 30th, 2007 by Ellen Reitmayr » Okular 5. ^https://okular.kde.org/news.php#itemOkular12released 6. ^{{cite web|title=Bug 151614 - store annotations with documents|url=https://bugs.kde.org/show_bug.cgi?id=151614|deadurl=yes|archiveurl=https://web.archive.org/web/20140819111812/https://bugs.kde.org/show_bug.cgi?id=151614|archivedate=2014-08-19|df=}} 7. ^{{Cite web|url=https://www.linux.com/news/3-alternatives-adobe-pdf-reader-linux|title=3 Alternatives to the Adobe PDF Reader on Linux|website=Linux.com {{!}} The source for Linux information|language=en|access-date=2018-09-14}} 8. ^[https://www.kde.org/applications/utilities/jovie/ Jovie on KDE.org] 9. ^Okular - Document format handlers status 10. ^[https://www.kde.org/announcements/fulllog_applications.php?version=17.12.0#okular KDE Applications 17.12.0 Full Log Page] 11. ^Okular and DRM 12. ^Okular, PDF and file permissions 13. ^[https://lwn.net/Articles/335415/ Okular, Debian, and copy restrictions] 14. ^Debian Bug report logs - #531221 okular: Arbitrarily enforces DRM by default External links{{Commons category}}
6 : Applications using D-Bus|EPUB readers|Free PDF readers|KDE Applications|Linux text-related software|PostScript |
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