Okular/zh-cn: Difference between revisions

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Okular 是神马？

Okular is a universal document viewer developed by KDE. Okular works on multiple platforms, including but not limited to Linux, Windows, Mac OS X, *BSD, etc.

关注 Okular 的开发进展？请移步至Okular 主页。

背景

Okular 的开发起初是 Google编程之夏活动的一部分，项目描述可以在 KDE 开发角找到。

Okular combines the excellent functionalities of KPDF with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.

文档格式操作页面有份图表，详细描述了支持格式以及每种格式支持的功能。

Annotations in Okular, which can be saved within the PDF file

除了支持多种格式外，Okular 也提供像是文本选择、注释、提取嵌入文档里的文件，和其他很多惊讶的特性。Okular 的截图可以在这里找到。

在 irc.freenode.org 的#okular 频道，您能和开发者和其他用户交流。

If you are interested in contributing to Okular, please contact the team. Programmers and non-coders are welcome all the same.

Mobile Version

Okular has a mobile version since version 0.16 release in February 2013 ^[1]. The first version was based on the active framework. The mobile viewer was then ported to Kirigami in 2016 by Marco Martin^[2] and finally to Kirigami2 in 2017^[3].

The mobile version doesn't support all features form desktop version, but provide better touch support and a mobile interface.

You can test the mobile version in your PC by entering

okularkirigami

in your terminal.

提示和技巧

Reviewing Documents / Annotations

Double clicking on either one of the Review tools (F6) allows you to make multiple annotations without having to reactivate the tool after the first time.

How to keep the annotations you made to the PDF file:

By default, Okular saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing File -> Save As..., so they can be seen in other PDF viewers. Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.

DRM

By default, Okular follow the PDF specification and don't allow copying text from DRM protected files. However, there is an option in the settings to disable DRM limitations in Settings -> General -> Program Features -> Obey DRM limitations

There was a small controversy in the Debian bug tracker a long time ago, about the default choice to Obey DRM limitations^[4]^[5]. This was then justified by a Okular/KPdf developer^[6].

PDF Signature and certificate

Okular can verify if a PDF certificate is valid. But you can not yet create new signature. See release note for more information.

More Information

References

[1] Release information

[2] rt mobile version from plasma-framework to kirigami

[3] rt mobile version from kirigami to kirigami2

[4] DRM and Okular in Debian bug tracker

[5] DRM and Okular in LWM

[6] Okular, PDF and file permissions

[1]

[2]

[3]

[4]

[5]

[6]

@@ Line 21: / Line 21: @@
 If you are interested in contributing to '''Okular''', please [http://okular.kde.org/contact.php contact the team]. Programmers and non-coders are welcome all the same.
+== Mobile Version ==
+Okular has a mobile version since version 0.16 release in February 2013 <ref>[https://okular.kde.org/news.php Release information]</ref>. The first version was based on the [https://community.kde.org/Plasma/Active active] framework. The mobile viewer was then ported to Kirigami in 2016 by Marco Martin<ref>[https://phabricator.kde.org/R223:eb1f73800e83b11e4a5ae93ac069893aa88f0eaa|Commit port mobile version from plasma-framework to kirigami]</ref> and finally to Kirigami2 in 2017<ref>[https://phabricator.kde.org/R223:caf8820cf773316ce41d9a8c1f7357b3ffc3ef86|Commit port mobile version from kirigami to kirigami2]</ref>.
+The mobile version doesn't support all features form desktop version, but provide better touch support and a mobile interface.
+[[File:Okular_mobile_pdf_view.png|250px]]
+[[File:Okular_mobile_toc.png|250px]]
+[[File:Okular_mobile_thumbmails.png|250px]]
+You can test the mobile version in your PC by entering {{Input|1=okularkirigami}} in your [[Special:myLanguage/Tutorials/Open a console|terminal]].
 ==提示和技巧==
@@ Line 32: / Line 44: @@
 By default, '''Okular''' saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing <menuchoice>File -> Save As...</menuchoice>, so they can be seen in other PDF viewers.
 Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.
+=== DRM ===
+By default, Okular follow the PDF specification and don't allow copying text from DRM protected files. However, there is an option in the settings to disable DRM limitations in <menuchoice>Settings -> General -> Program Features  -> Obey DRM limitations</menuchoice>
+There was a small controversy in the Debian bug tracker a long time ago, about the default choice to Obey DRM limitations<ref>[https://lists.debian.org/debian-devel/2009/05/msg00879.html DRM and Okular in Debian bug tracker]</ref><ref>[https://lwn.net/Articles/335415/ DRM and Okular in LWM]</ref>. This was then [https://tsdgeos.blogspot.com/2009/06/okular-pdf-and-drm.html justified] by a Okular/KPdf developer<ref>[https://tsdgeos.blogspot.com/2009/06/okular-pdf-and-drm.html Okular, PDF and file permissions]</ref>.
+=== PDF Signature and certificate ===
+Okular can verify if a PDF certificate is valid. But you can not yet create new signature. See [https://tsdgeos.blogspot.com/2019/01/okular-pdf-signature-certificate.html release note] for more information.
+== More Information ==
+* [https://docs.kde.org/trunk5/en/kdegraphics/okular/index.html Official KDE documentation]
+* [https://okular.kde.org/ Okular website]
+* [https://api.kde.org/okular/html/index.html Okular API documentation]
+* [https://phabricator.kde.org/project/view/158/ Okular phabricator project]
+* [https://phabricator.kde.org/source/okular/ Okular git repository]
+== References ==
 [[Category:图形/zh-cn]]