Re: HTMLtoIMAGE_v100
Yeah the whole page is generated by Java. I guess I was expecting too much. Bob S > On Dec 17, 2018, at 10:13 , hh via use-livecode > wrote: > >> Bob S. wrote: >> I tried this on a copier web portal. It produced a 0 kbyte file with no >> image. > > So the imagedata of the canvas was empty. > Thus a pdf created from the DOM will also not work with such pages. > It will have to rely on the print-layout of the portal: Can you print it > correctly from a desktop browser? > > What we could try is to scroll the widget down in appropriate pieces and make > ordinary LC-snapshots from it. > > This is from the html2canvas library docs: > > Limitations > All the images that the script uses need to reside under the same origin for > it to be able to read them without the assistance of a proxy. Similarly, if > you have other canvas elements on the page, which have been tainted with > cross-origin content, they will become dirty and no longer readable by > html2canvas. > The script doesn't render plugin content such as Flash or Java applets. > > Portals (and livecode.com) use often WordPress or similar with lots of > plugins... > > > ___ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: HTMLtoIMAGE_v100
> Bob S. wrote: > I tried this on a copier web portal. It produced a 0 kbyte file with no > image. So the imagedata of the canvas was empty. Thus a pdf created from the DOM will also not work with such pages. It will have to rely on the print-layout of the portal: Can you print it correctly from a desktop browser? What we could try is to scroll the widget down in appropriate pieces and make ordinary LC-snapshots from it. This is from the html2canvas library docs: Limitations All the images that the script uses need to reside under the same origin for it to be able to read them without the assistance of a proxy. Similarly, if you have other canvas elements on the page, which have been tainted with cross-origin content, they will become dirty and no longer readable by html2canvas. The script doesn't render plugin content such as Flash or Java applets. Portals (and livecode.com) use often WordPress or similar with lots of plugins... ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: HTMLtoIMAGE_v100
I tried this on a copier web portal. It produced a 0kbyte file with no image. Bob S > On Dec 17, 2018, at 08:19 , hh via use-livecode > wrote: > > HTMLtoIMAGE > makes an image of the *whole* HTML content of a browser widget > (while waiting for printToPdf from the browser widget in 9.x). > The image may have a height of several thousands pixels. > > Download from "Sample Stacks" or > http://livecodeshare.runrev.com/stack/919/ > > The stack is based on the library from > https://html2canvas.hertzen.com (MIT licensed). > > This javaScript library takes "screenshots" of webpages based on > the DOM, and as such may not be 100% accurate to the real > representation as it does not make an actual screenshot, but > builds the screenshot based on the information available on the > page. > Then it saves the data to a canvas. [(With movies) "Overlayed" > pages as livecode.com are only partially saved, just try.] > > We don't display this HTML5-canvas in a browser but catch with > a javascriptHandler the imagedata and save it to a local image. > You can set options: > • the image format: JPEG with quality level or PNG, > • an image scale (percentage). > > The javaScript library is included in the stack (please watch > its license). > ___ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
HTMLtoIMAGE_v100
HTMLtoIMAGE makes an image of the *whole* HTML content of a browser widget (while waiting for printToPdf from the browser widget in 9.x). The image may have a height of several thousands pixels. Download from "Sample Stacks" or http://livecodeshare.runrev.com/stack/919/ The stack is based on the library from https://html2canvas.hertzen.com (MIT licensed). This javaScript library takes "screenshots" of webpages based on the DOM, and as such may not be 100% accurate to the real representation as it does not make an actual screenshot, but builds the screenshot based on the information available on the page. Then it saves the data to a canvas. [(With movies) "Overlayed" pages as livecode.com are only partially saved, just try.] We don't display this HTML5-canvas in a browser but catch with a javascriptHandler the imagedata and save it to a local image. You can set options: • the image format: JPEG with quality level or PNG, • an image scale (percentage). The javaScript library is included in the stack (please watch its license). ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
