blocks|key|1803400|text|在chrome+(v18%2B)中，我们有--kiosk+--kiosk-printing开关。用户可以自动打印到默认打印机，而无需确认打印。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1803401|你可以从这段视频中看到http://www.youtube.com/watch?v=D6UHjuvI7IE|1803402|entityMap|0|LINK|mutability|MUTABLE|url|http://www.youtube.com/watch?v=D6UHjuvI7IE^0|J|O|0|B|16|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@]|D|@$9|T|A|U|1|V]]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

In chrome (v18+) we have the <code>--kiosk --kiosk-printing</code> switches. One can print automatically to default printer without print confirmation.

You can see it from this video <a href="http://www.youtube.com/watch?v=D6UHjuvI7IE" rel="noreferrer">http://www.youtube.com/watch?v=D6UHjuvI7IE</a>

blocks|key|5893530|text|由于NPAPI允许您创建可通过对象标记(可以从扩展使用)与之交互的原生C%2B%2B插件，因此这可能是实现此目的的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5893531|棘手的一点是，我不知道一个好的方法来获得打印页面的位。我认识的唯一一个做过类似事情的人实际上得到了浏览器的窗口句柄(可以通过NPAPI获得)，并把它的一小部分刮下来以这种方式打印，但这不会考虑打印样式表或其他任何东西。您也可以尝试使用自动化事件来尝试控制打印对话框，但我不知道这是否有效。|5893532|在设计上，浏览器尽量不让你做这样的事情，因为如果任何网站在没有确认的情况下就开始向你的打印机打印东西，它可能会打开一些严重的漏洞……|5893533|无论如何，如果你找到了使用C%2B%2B的方法，你可以使用FireBreath来简化NPAPI插件的创建。|offset|length|5893534|entityMap|0|LINK|mutability|MUTABLE|url|http://www.firebreath.org/^0|0|0|0|P|A|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@$H|V|I|W|1|X]]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

Since NPAPI allows you to create native C++ plugins that you can interact with through an object tag (which you can use from an extension), that would probably be the way to do it.

The tricky bit is that I don't know of a good way to get the bits for printing the page. The only person I know of who has done something similar to this actually got the window handle for the browser (available through NPAPI) and scraped the bits off of it to print that way, but that won't take into account print stylesheets or anything. You could also try using automation events to try to control the print dialog, but I have no idea if that would work or not.

By design, the browsers try not to let you do something like this, as it could open some serious vulnerabilities if any website could just start printing things to your printer without confirmation...

Anyway, if you find a way to do it with C++ you can use <a href="http://www.firebreath.org" rel="nofollow">FireBreath</a> to ease the creation of the NPAPI plugin.

blocks|key|2365206|text|有各种扩展程序可以拍摄当前网页的快照(例如，this+one)；您可以调整一个扩展程序，以便通过NPAPI插件将图像发送到打印机。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2365207|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/chrome-screen-capture/^0|M|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

There are various extensions that take snapshots of the current web page (for example, <a href="http://code.google.com/p/chrome-screen-capture/" rel="nofollow">this one</a>); you could adapt one to send the image to a printer via an NPAPI plugin.

blocks|key|5893599|text|我最近一直在寻找类似的功能，似乎使用Chrome的新原生消息api是很有可能的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5893600|https://developer.chrome.com/extensions/nativeMessaging|offset|length|5893601|在C#中有很多这样的例子，但这里有一个用基本的C#应用排除Chrome原生消息故障的快速例子|5893602|Native+messaging+from+chrome+extension+to+native+host+written+in+C#|5893603|我意识到这可能晚了一天，少了一美元，但如果有人遇到这个问题，这就是对我有效的解决方案。在C#应用程序内部，您可以使用PrintDocument类直接打印到已安装的打印机。如果您找到了获取页面图像的方法，这将比使用firebreath或NPAPI容易得多。|style|CODE|5893604|entityMap|0|LINK|mutability|MUTABLE|url|1|https://stackoverflow.com/questions/27643892/native-messaging-from-chrome-extension-to-native-host-written-in-c-sharp^0|0|0|1J|0|0|0|0|1V|1|0|1M|D|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|12|8|@]|9|@$D|13|E|14|1|15]]|A|$]]|$1|J|3|K|5|6|7|16|8|@$D|17|E|18|L|M]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|C]]|U|$5|Q|R|S|A|$T|V]]]]

I've recently been looking for a similar ability, and it seems like it would be quite possible using Chrome's new native messaging api. 

<a href="https://developer.chrome.com/extensions/nativeMessaging" rel="nofollow noreferrer">https://developer.chrome.com/extensions/nativeMessaging</a>

There are plenty of examples of this with C#, but here is one quick example of troubleshooting Chrome native messaging with a basic C# application

<a href="https://stackoverflow.com/questions/27643892/native-messaging-from-chrome-extension-to-native-host-written-in-c-sharp">Native messaging from chrome extension to native host written in C#</a>

I realize this may be a day late and a dollar short, but in case anyone else comes across this question, this is the solution that worked for me. From inside a C# app, you can directly print to installed printers using the <code>PrintDocument</code> class. If you figured out a way to get the page image, this would be far easier than using firebreath or NPAPI.

blocks|key|1803444|text|在Mac上禁用Google+Chrome中的打印预览|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1803445|1803446|在你的苹果电脑上退出谷歌浏览器|ordered-list-item|1803447|启动终端。(使用搜索框搜索“终端”)|1803448|类型默认值写入com.google.Chrome+DisablePrintPreview+-bool+true|1803449|关闭终端并打开|1803450|+Chrome|1803451|在Windows上禁用Google+Chrome中的打印预览|1803452|从桌面上关闭|1803453|1803454|，右键单击Google+Chrome|1803455|预览单击Properties|1803456|In对话框，在目标字段末尾添加‘-disable-print-|1803457|’删除撇号(请确保包括-前的空格)|1803458|单击Apply|1803459|<>G225|1803460|在Mac上禁用Firefox中的打印预览|1803461|1803462|在地址栏中键入“about:config”并按Enter。|unordered-list-item|1803463|右键单击页面，将鼠标悬停在“新建”上，然后单击“”print.always_print_silent“”作为首选项名称，然后单击“”OK“”|1803464|单击“”true“”并单击“”OK“”。|1803465|关闭“about:config”窗口。|1803466|1803467|在上禁用Firefox中的打印预览|1803468|1803469|1803470|右键单击页面，将鼠标悬停在“新建”上，然后单击“Boolean”Type|1803471|‘print.always_print_silent‘作为首选项名称，然后单击“确定”|1803472|单击“true”并单击“OK”。|1803473|关闭about:config窗口。|1803474|1803475|https://support.dryfta.com/how-to-disable-print-preview-in-chrome-firefox-on-windows-mac/|1803476|entityMap|0|LINK|mutability|MUTABLE|url^0|0|4|0|0|0|0|0|0|0|0|8|0|0|0|0|0|0|0|0|0|0|4|0|0|0|0|0|0|0|0|1|0|0|0|0|0|0|0|0|0|2H|0|0^^$0|@$1|2|3|4|5|6|7|27|8|@$9|28|A|29|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|2A|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|2B|8|@]|D|@]|E|$]]|$1|J|3|K|5|I|7|2C|8|@]|D|@]|E|$]]|$1|L|3|M|5|I|7|2D|8|@]|D|@]|E|$]]|$1|N|3|O|5|I|7|2E|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|2F|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|2G|8|@$9|2H|A|2I|B|C]]|D|@]|E|$]]|$1|T|3|U|5|6|7|2J|8|@]|D|@]|E|$]]|$1|V|3|-4|5|I|7|2K|8|@]|D|@]|E|$]]|$1|W|3|X|5|I|7|2L|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|6|7|2M|8|@]|D|@]|E|$]]|$1|10|3|11|5|I|7|2N|8|@]|D|@]|E|$]]|$1|12|3|13|5|I|7|2O|8|@]|D|@]|E|$]]|$1|14|3|15|5|I|7|2P|8|@]|D|@]|E|$]]|$1|16|3|17|5|6|7|2Q|8|@]|D|@]|E|$]]|$1|18|3|19|5|6|7|2R|8|@$9|2S|A|2T|B|C]]|D|@]|E|$]]|$1|1A|3|-4|5|6|7|2U|8|@]|D|@]|E|$]]|$1|1B|3|1C|5|1D|7|2V|8|@]|D|@]|E|$]]|$1|1E|3|1F|5|1D|7|2W|8|@]|D|@]|E|$]]|$1|1G|3|1H|5|1D|7|2X|8|@]|D|@]|E|$]]|$1|1I|3|1J|5|1D|7|2Y|8|@]|D|@]|E|$]]|$1|1K|3|-4|5|6|7|2Z|8|@]|D|@]|E|$]]|$1|1L|3|1M|5|6|7|30|8|@$9|31|A|32|B|C]]|D|@]|E|$]]|$1|1N|3|-4|5|6|7|33|8|@]|D|@]|E|$]]|$1|1O|3|1C|5|I|7|34|8|@]|D|@]|E|$]]|$1|1P|3|1Q|5|I|7|35|8|@]|D|@]|E|$]]|$1|1R|3|1S|5|I|7|36|8|@]|D|@]|E|$]]|$1|1T|3|1U|5|I|7|37|8|@]|D|@]|E|$]]|$1|1V|3|1W|5|I|7|38|8|@]|D|@]|E|$]]|$1|1X|3|-4|5|6|7|39|8|@]|D|@]|E|$]]|$1|1Y|3|1Z|5|6|7|3A|8|@]|D|@$9|3B|A|3C|1|3D]]|E|$]]|$1|20|3|-4|5|6|7|3E|8|@]|D|@]|E|$]]]|21|$22|$5|23|24|25|E|$26|1Z]]]]

Disable print preview in Google Chrome on Mac
<ol>
<li>Quit Google Chrome</li>
<li>Launch Terminal on your Mac. (Search “Terminal” using the Search box)</li>
<li>Type defaults write com.google.Chrome DisablePrintPreview -bool true</li>
<li>Close Terminal and open Google Chrome</li>
</ol>
Disable print preview in Google Chrome on Windows
<ol>
<li>Close Google Chrome</li>
<li>From your desktop, right click Google Chrome</li>
<li>Click Properties</li>
<li>In the dialog box, add ‘ –disable-print-preview‘ at the end of the Target field sans the apostrophe (make sure to include the space before –)</li>
<li>Click Apply</li>
</ol>
Disable print preview in Firefox on Mac
<ul>
<li>In the address bar type “about:config” and press Enter.</li>
<li>Right click on the page, hover over ‘New’ and click on ‘Boolean’</li>
<li>Type ‘print.always_print_silent’ as the preference name and click ‘OK’</li>
<li>Click on ‘true’ and click ‘OK’.</li>
<li>Close the about:config window.</li>
</ul>
Disable print preview in Firefox on Windows
<ol>
<li>In the address bar type “about:config” and press Enter.</li>
<li>Right click on the page, hover over ‘New’ and click on ‘Boolean’ Type</li>
<li>‘print.always_print_silent‘ as the preference name and click ‘OK’</li>
<li>Click on ‘true’ and click ‘OK’.</li>
<li>Close the about:config window.</li>
</ol>
<a href="https://support.dryfta.com/how-to-disable-print-preview-in-chrome-firefox-on-windows-mac/" rel="nofollow noreferrer">https://support.dryfta.com/how-to-disable-print-preview-in-chrome-firefox-on-windows-mac/</a>

I'm developing an internal Google Chrome Extension that needs a way to initiate print the current page to the printer. I do not want the default Print dialog to come up (so, javascript:window.print() is out of question). 

As far as I understand, this is not possible just with the JS + HTML plug-in, so I'm also open to using the NPAPI plugin also (with a dummy mime-type). And I'm concerned for Windows platform only.

I'm also open for various hacks / workarounds if possible, though a standard solution would be nice.

If you think this is not possible, let me know if you know any feature request logged for it?

Any suggestions/clarifications are welcome..

Google Chrome Extension: Print the page silently

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在开发一个内部Google Chrome扩展，它需要一种方法来启动将当前页面打印到打印机。我不希望出现默认的打印对话框(所以，javascript:window.print()是不成问题的)。据我所知，仅使用JS + HTML插件是不可能的，所以我也愿意使用NPAPI插件(使用虚拟mime类型)。我只关心Windows平台。如果可能的话，我也对各种hack/变通方法持开放态度，尽管一个标准的解

问Google Chrome扩展:静默打印页面
EN

回答 5

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