801186 - Handle viewport meta tag

Status: RESOLVED INCOMPLETE

(Firefox for Metro Graveyard :: Browser, defect, P2)

Description

[Allison Naaktgeboren :ally]

depends on viewport panning/zooming

Comment 1

[Matt Brubeck (:mbrubeck)]

Marking this as P3 for now because I don't think it's 100% critical on the large-screen (10" and larger) devices that Windows 8 is currently targeting.  However, it is definitely an improvement in web compatibility in portrait mode for tablets, and is a parity feature for IE10 and for other mobile platforms.  This might increase in priority based on testing and feedback.

Comment 2

[Tim Abraldes [:TimAbraldes] [:tabraldes]]

This blocks a [block28] blocker, but is marked as P3. Do we want to treat this bug as a [block28] blocker as well?

Comment 3

[Tim Abraldes [:TimAbraldes] [:tabraldes]]

Marking for triage to address the above question

Comment 4

[Jim Mathies [:jimm]]

Anyone remember which bug we ripped the original viewport stuff out in?

Comment 5

[Jim Mathies [:jimm]]

(In reply to Jim Mathies [:jimm] from comment #4)
> Anyone remember which bug we ripped the original viewport stuff out in?

found it - bug 922337

Comment 6

[Milan Sreckovic [:milan] (needinfo for best results)]

This is now handled for b2g, if it helps.

Comment 7

[Patrick H. Lauke]

IE10/IE11 in snap mode use CSS device adaptation, rather than meta viewport, to decide if a snapped view should auto-zoom or use nominal device-width. (see two attached screenshots)

@-ms-viewport { width: device-width; }

Is this also covered by this bug? i.e. if a site does start to include @viewport to support snap mode (assuming it also includes it non-vendor-prefixed, which is possibly a stretch of the imagination...), will Firefox in snap mode react to that too?

Comment 8

[Patrick H. Lauke]

Attachment: IE11 in quarter-screen snap mode sets a viewport of 1024px width and auto-scales it down.

Comment 9

[Patrick H. Lauke]

Attachment: IE11 in quarter-screen snap mode with -ms-viewport directive uses actual device resolution, with no auto-scaling

Comment 10

[Patrick H. Lauke]

Attachment: Firefox Aurora in quarter-screen snap mode uses device resolution with no auto-scaling/zooming

Comment 11

[Matt Brubeck (:mbrubeck)]

(In reply to Patrick H. Lauke from comment #7)
> IE10/IE11 in snap mode use CSS device adaptation, rather than meta viewport,
> to decide if a snapped view should auto-zoom or use nominal device-width.

<meta name=viewport> and @viewport are both part of CSS Device Adaptation.  Currently Gecko supports only the <meta> syntax.  We'd like to support the @viewport syntax too, but haven't started work on it yet (bug 747754).

Comment 12

[Patrick H. Lauke]

ah, thanks for clarifying. last time i checked, CSS Device Adaptation only included a short reference to the meta and how @viewport would map against it. latest version http://dev.w3.org/csswg/css-device-adapt/#viewport-meta seems to effectively retrospectively spec Apple's behavior...good stuff.

Comment 13

[Firefox Bug Husbandry Bot]

Mass close of bugs in obsolete product https://bugzilla.mozilla.org/show_bug.cgi?id=1350354