<webview> printToPDF window content scales down in relation to page size if screen Display text/apps setting is greater than 100%

[midweststudios]

Using <webview>.printToPDF()

• Electron version: 1.6.5 (upgraded in case latest version fixed issue)
• Operating system: Windows 8 & Windows 10 (only when screen Display text/apps setting is scaled from 100%)

Expected behavior

PDF content fills entire height/width of print page size (i.e. ratio 1:1)

Actual behavior

Example for screen display scale set at 200% on a Windows Surface Pro 3:

• var options = {marginsType: 1, pageSize: "Letter"}
  • I also tried height and width in microns for the pageSize

PDF exports at correct Letter size (8.5in x 11in) but the target content is scaled down 50% (4.25in x 5.5in) on the page.

[midweststudios]

I think this can be resolved by making all of the key's assigned in const defaultPrintingSetting = {} available options within WebContents.prototype.printToPDF = function (options, callback) {...}. Then in my project file I can check for the screen's scaleFactor and/or it can be as simple as changing fitToPageEnabled: false to fitToPageEnabled: true. Won't know for sure until I run tests though.

Please reference: https://github.com/electron/electron/blob/master/lib/browser/api/web-contents.js

Note: I need to wrap up the project that's having this issue and would prefer just modifying the file from my local install, but I haven't been able to find the Electron .js source files. If anyone can point me in the right direction, I would greatly appreciated it!

[codebytere]

We are no longer implementing bugfixes for versions of Electron <= 1.7.x, so i'm going to close this issue but if it is still persisting in more recent versions of Electron we can certainly reopen it!

[Alecyrus]

I set page rule like this

@page { 
     size A4 portrait;

}

.content {
  background #fff
  box-shadow inset 0 0 1px 1px red
}

but every page of printed PDF by webContent.printToPDF always overflow. You can notice that the width of red edges is 1px, but the width of overflow part is smaller than 1px. Very strange.

Left corner

Right corner

And letter will be fine. A4、A5 always overflow, which will cause another blank page being printed

When I change the page size from A4 (210mm 297mm) to 212mm 296.994mm, the overflow parts disappears. but the bottom of page still overflow because of the blank page .

[Alecyrus]

Is fitToPageEnabled available ?, I can not find it in official document.

[Alecyrus]

#20436