[Okular-devel] Epub - webkit, getting text bounds

[Albert Astals Cid]

El Dimarts, 4 de juny de 2013, a les 20:00:51, Jaydeep Solanki va escriure:
> On Mon, Jun 3, 2013 at 2:43 AM, Albert Astals Cid <aacid at kde.org> wrote:
> > El Dilluns, 3 de juny de 2013, a les 01:52:04, Jaydeep Solanki va 
escriure:
> > > Hi,
> > > While working on getting text bounds work I discovered that
> > > QWebFrame::hitTestContent(QPoint()) hits the outermost element, inside
> > 
> > body.
> > 
> > > Consider the below HTML,
> > > 
> > > <section>
> > > <p id="p1">some text...</p>
> > > <div>...</div>
> > > <p id="p2">some other text..</p>
> > > </section>
> > > 
> > > Now we have two QPoints;
> > > QPoint pt1 => which points somewhere within p1
> > > QPoint pt2 => which points somewhere within p2
> > > 
> > > var ht1 = QWebFrame::hitTestContent(pt1);
> > > var ht2 = QWebFrame::hitTestContent(pt2);
> > 
> > Why are you using hitTestContent to get the data? Isn't there something
> > better? What's your plan? call hitTestContent for all the points or?
> 
> Yes, I agree traversing the DOM is a better idea.
> 
> I googled a bit & found that we cannot get the bounding rect of text from
> webkit
> (source<http://comments.gmane.org/gmane.os.opendarwin.webkit.qt/1130>), but
> we can get the bounding box of the HTML element. I don't get it, why it
> isn't possible, because in QWebView when we select any text, it gets
> highlighted, which is basically filling color in the bounding box of the
> text, which indirectly means that Webview knows the bounding rects. Do I
> make sense ?
> Please comment on this.

What about the suggestion in that very same url of using qwebelement?

Cheers,
  Albert

> 
> & if everything fails, QFontMetrics may be of some use. We can get the font
> metrics, & using it + the bounding box of the HTML element, we can predict
> the bounding rects.
> 
> Cheers,
> Jaydeep
> 
> > Cheers,
> > 
> >   Albert
> >   
> > > Analysing ht1 & ht2 turns out that both of them point to the section
> > > element, which seems to be a little problem. I'm searching for other
> > > ways
> > > to do it. If you have any idea to get it work, please share.
> > > 
> > > Cheers,
> > > Jaydeep
> > 
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