1250348 - Tall <iframe> elements are truncated at page boundaries (instead of being split across pages, like tall images are)

Status: RESOLVED DUPLICATE of bug 1640197

(Core :: Printing: Output, defect, P3)

Description

[Daniel Holbert [:dholbert]]

STR:
 1. Load attached testcase; note that you can scroll down and see the "DO YOU SEE ME" text.
 2. Print or print-preview the page.

ACTUAL RESULTS:
Printed output is truncated to 1 page. "DO YOU SEE ME" text isn't visible.

EXPECTED RESULTS:
Full output should have been printed.

This is because we can't split tall <iframe> elements across pages, I believe. We do this for img elements, so we could in theory do it for <iframe> as well.

Comment 1

[Daniel Holbert [:dholbert]]

(This issue was originally reported on bug 1106301; I spun it off as this new bug, to start fresh without a backlog of diagnosis back-and-forth.)

Comment 2

[Glenn Linderman]

Just ran into this bug. In desperation, switched from <iframe> to <object>, to no avail. Not sure if tall <object> elements should be added to this bug, or a different bug created for tall <object> elements. Would be nice if there were some action on this bug.

Comment 3

[Mats Palmgren (inactive)]

1. Load attached testcase; note that you can scroll down and see the "DO YOU SEE ME" text.

It seems you forgot to attach the testcase...

Comment 4

[Mats Palmgren (inactive)]

Attachment: Testcase #1

I'm guessing it's something like this...

Comment 5

[Mats Palmgren (inactive)]

Somewhat related to bug 534182 although in this case with the additional complication that it'd be extremely hard to support real fragmentation in this case...

Comment 6

[Mats Palmgren (inactive)]

Attachment: Testcase #2

A test to show that Chrome doesn't fragment either, it just slices the rendering (mid-way through an "A").

Comment 7

[Mats Palmgren (inactive)]

Bug 1640197 / bug 1665214 should fix this when we enable it.

Comment 8

[Ting-Yu Lin [:TYLin] (PST, UTC-7)]

Testcase #1 and #2 look good when layout.display-list.improve-fragmentation=true (the default value). I can see the content loss in print-preview, i.e. only the first page shows, with layout.display-list.improve-fragmentation=false.