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==Okular 是什麽？==
==Okular 是什麽？==


{|class="tablecenter vertical=centered" width=85%
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.
|[[Image:Okular.png|left|]]|| '''Okular 是 KDE SC 4.x 的通用文件檢視器'''
|}


您可以看[http://okular.kde.org/ 首頁]來檢視這個專案的開發狀況。
您可以看[http://okular.kde.org/ 首頁]來檢視這個專案的開發狀況。


==背景==
Its development began as part of Google's Summer of Code program. The description of the project can be found at [https://web.archive.org/web/20080921165821/https://developer.kde.org/summerofcode/okular.html KDE Developer's Corner].


==背景==
'''Okular''' combines the excellent functionalities of [[Special:myLanguage/KPDF|KPDF]] with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.


它的開發最初是作為 Google 夏日程式碼大賽的一部分。專案的敘述可以在[http://developer.kde.org/summerofcode/okular.html KDE 開發者角落]找到。
The [https://okular.kde.org/formats.php document format handlers page] has a chart describing in more detail the supported formats and the features supported in each of them.


Okular 將支援多種不同類型的文件，像是 PDF，Postscript，DjVu，CHM 和多種不同類型的文件與 [[Special:myLanguage/KPDF|KPDF]] 的優秀功能相結合。
[[Image:Okular-annotations.png|thumb|300px|center|Annotations in Okular, which can be saved within the PDF file]]


[http://okular.kde.org/formats.php 文件格式操作頁面] 有一份圖表描述支援格式的詳細細節和每種格式支援的功能。
As well as supporting many formats, '''Okular''' offers such features as text selection, annotation, extraction of files embedded within a document, and many other surprises.  Screenshots of '''Okular''' in action can be seen [https://okular.kde.org/screenshots.php here].


你可以在 irc.freenode.org 的[irc://irc.kde.org/#okular #okular] 頻道與開發者和其他使用者交流。


[[Image:Okular-annotations.png|thumb|300px|center|Okular 的註釋功能]]
If you are interested in contributing to '''Okular''', please [https://okular.kde.org/contact.php contact the team]. Programmers and non-coders are welcome all the same.


== Mobile Version ==


除了支援多種格式外，'''Okular''' 也提供像是文字選取，註釋，解壓縮嵌入文件內的檔案這樣的功能，還有其他很多驚人的功能。執行 '''Okular''' 的螢幕截圖可以在[http://okular.kde.org/screenshots.php 這裡]找到。
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>.


你可以在 irc.freenode.org 的[irc://irc.kde.org/#okular #okular] 頻道與開發者和其他使用者交流。
The mobile version doesn't support all features from the desktop version, but provide better touch support and a mobile interface.  


如果你有興趣為 Okular 做貢獻，請點選[http://okular.kde.org/contact.php 這裡]聯絡團隊。程式設計師和非程式設計師都一樣歡迎。
[[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]]. A nightly android version is also available at the KDE [https://binary-factory.kde.org/view/Android/job/Okular_android/ binary factory].


==提示和技巧==
==提示和技巧==


=== 列印 ===
=== Reviewing Documents / Annotations ===
 
Double-clicking on either one of the '''Review''' tools (<keycap>F6</keycap>) 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 <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 follows 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>. The choice was then [https://tsdgeos.blogspot.com/2009/06/okular-pdf-and-drm.html explained] by an 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 a new signature. See the [https://tsdgeos.blogspot.com/2019/01/okular-pdf-signature-certificate.html release note] for more information.


在[http://forum.kde.org/viewtopic.php?f=20&t=85805&p=147758#p147758 這個論壇貼文中]有一個使用者回報 Okular 無法列印 PDF。這個問題是源自錯誤的 ~/.cups/lpoptions檔案。重命名這個檔案以便 Okular 重建它，此後該使用者的 PDF 列印恢復正常。
== More Information ==


=== 回顧文件 ===
* [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]


在任意一個 '''回顧''' 工具上雙擊 (<keycap>F6</keycap>) 讓您可以在第一次啟動後不需要重新啟動工具就可以作出多個註釋。
== References ==


[[Category:圖形/zh-tw]]
[[Category:圖形/zh-tw]]

Latest revision as of 10:30, 22 February 2019

Other languages:

Okular 是什麽？

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.

您可以看首頁來檢視這個專案的開發狀況。

背景

Its development began as part of Google's Summer of Code program. The description of the project can be found at KDE Developer's Corner.

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

The document format handlers page has a chart describing in more detail the supported formats and the features supported in each of them.

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

As well as supporting many formats, Okular offers such features as text selection, annotation, extraction of files embedded within a document, and many other surprises. Screenshots of Okular in action can be seen here.

你可以在 irc.freenode.org 的#okular 頻道與開發者和其他使用者交流。

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 from the 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. A nightly android version is also available at the KDE binary factory.

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 follows 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]. The choice was then explained by an Okular/KPdf developer[6].

PDF Signature and certificate

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

More Information

References

  1. ↑ Release information
  2. ↑ Commit port mobile version from plasma-framework to kirigami
  3. ↑ Commit port 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
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