Highlighter tool

[tajgarhwa]

When I enable the Highlighter tool (setHighlightColor and setTextHighlighterOn), highlighting works correctly. But when I touch the PDF screen, instead of selecting text, it behaves like freehand doodle/ink drawing.

Expected behavior:
When Highlighter mode is enabled, the user should only be able to select text and apply highlight. The ink/doodle mode should not be triggered automatically.

What I tried:

Set pdfViewer.cursorToolMode = TEXT_SELECT

Tried disabling ink and other tools via setInkOn(false), setFreeTextOn(false), setStampOn(false)
But still, on touch, the doodle behavior is triggered.

Question:
Is there any additional API call required to properly enable only Highlighter mode?
Or is this a bug where ink/doodle mode gets activated automatically?

[Bhuvaneshw]

Yep, this looks like bug. Is this what you are saying in #37 too?

[tajgarhwa]

Yes

[Bhuvaneshw]

You could have used the same issue! Anyway I'll look into it!

[Bhuvaneshw]

Checked with Pdf.js original distribution and this the default behavior.

When you start dragging from a point(staring point) which is not a text, then it behaves like free hand highlighting. Its not ink mode that gets activated.

[tajgarhwa]

Hi, thanks for your reply earlier.

I understand that in PDF.js the default behavior is: if the drag starts on a non-text area, it behaves like free-hand highlighting.

The problem we’re facing is that when free-hand highlighting starts, the PDF cannot be scrolled (because the drag gesture is consumed).

Is there any way to disable this free-hand highlighting behavior, so that dragging on non-text areas simply scrolls the page instead of starting highlight mode?

If there is no built-in API, could you please suggest a recommended workaround?

Thanks again for your help and for this great library!

[Bhuvaneshw]

I'll try to find a workaround, can't assure if it is possible!