[webkit-dev] Duplicate page: Implementing Print Preview

Sverrir Á. Berg sverrir at chromium.org
Wed May 27 11:05:44 PDT 2009

Interesting idea.  I see two downsides to that though.  Firstly I think need
some kind of PDF library since only Mac's have native support and when the
user needs to change the layout of the page (margins, portrait/landscape) I
would need to re-create the PDF again?


On Wed, May 27, 2009 at 1:03 PM, David Hyatt <hyatt at apple.com> wrote:

> Can you render the page to PDF and display the PDF?  Maybe you could render
> the page into bitmaps if you aren't able to support PDF.
> dave
> (hyatt at apple.com)
> On May 27, 2009, at 11:53 AM, Sverrir Á. Berg wrote:
> Hi all,
> I'm working on Google Chrome and trying to come up with a way to implement
> print preview.  To be able to display it in a separate tab we need to be
> able to duplicate the current page in memory so the user can continue to
> interact with the original page.  Javacript, animations etc should continue
> on the original page but be frozen in the print preview version.
> What I've tried so far is to select everything on the page
> (Frame::selection()->SelectAll()) and Frame::GetSelection(true) but the HTML
> does not fully describe the page and this has the downside of modifying the
> users selection on the page.
> I've poked around in WebKit a bit and as far as I can tell the document,
> rendertree and the views are fairly integrated and not easy to take a
> snapshot of the full state of the document.  I would appreciate any insights
> on this though since I might have missed something obvious.
> If nothing existing can be reused then adding this functionality should
> benefit all ports.  But again I need your insights on how this can be done
> (if at all).
> Sverrir
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